CN102475958A

Movatterモバイル変換

Info

Publication number: CN102475958A
Application number: CN2011102398715A
Authority: CN
Inventors: 伊藤洋正; 中岛义文; 竹地隆晴
Original assignee: Bridgestone Corp
Current assignee: Bridgestone Corp
Priority date: 2010-11-22
Filing date: 2011-08-19
Publication date: 2012-05-30
Also published as: US20120129624A1

Abstract

Translated fromChinese

本发明的第1目的在于，提供一种高尔夫球杆用握把，采用该握把，能够实现配重平衡，提高挥杆性能，防止球杆头的面部与球相撞时的角度偏差，制造容易且抓握感觉良好。为达到这样的目的，本发明的高尔夫球杆用握把，为具有内侧部件与外侧部件这样的双层结构，所述内侧部件为筒状且由比重比较大的橡胶组成物构成，所述外侧部件由比所述内侧部件比重小的橡胶组成物构成，所述内侧部件的长度比所述外侧部件的长度短。

The first object of the present invention is to provide a grip for golf clubs, which can achieve counterweight balance, improve swing performance, and prevent angular deviation when the face of the club head collides with the ball. Easy and feels good to hold. To achieve such an object, the golf club grip of the present invention has a double-layer structure of an inner member and an outer member, the inner member is cylindrical and made of a rubber composition with a relatively large specific gravity, and the outer The member is made of a rubber composition having a lower specific gravity than the inner member, and the length of the inner member is shorter than that of the outer member.

Description

Handle for golf club

Technical field

The present invention relates to a kind of handle for golf club.

Background technology

Generally speaking, golf clubs is made up of club head, bar portion and handle.In the prior art, handle is made up of the material of for example rubber or silicones etc.Through using such material to constitute handle, the person has good grasping sensation when the grasping golf clubs thereby can make the golf ball-batting, and can improve skidproof effect, thereby can prevent in addition the service life of the aging raising of handle handle.In addition, in order to improve the sensation that square stance swings, generally can adjust in the prior art the weight of handle.

Recently, because new exploitation of club head material and lightening of bar portion weight make the overall weight of golf clubs also become lighter.Using lighter golf clubs can improve striking speed increases the flying distance of the ball that hits; Yet; The golf clubs of kicking up is being waved following time,, thereby can move it track and occur deviation easily because it is lighter; Thereby make that the batting track is unstable, thereby cause the relatively poor such problem of ball-hitting quality.

In order to improve such problem, in the prior art, on the handle of golf clubs, weight being installed is weight member.Such weight member can be the thin plate of plumbous system; The position that is used to handle is installed that this lead sheeting is twisted in bar portion is near the handle cardinal extremity, afterwards common employed handle parts is entrenched in from the top that twists in the plumbous sheeting in the bar portion in the bar portion and realizes fixing with binding agent etc.Or, the miscellaneous part (the open communique spy of Japanese patent of invention opens flat 6-142244) that contains counterweight is installed at the cardinal extremity of handle parts.At this moment, install before the weight member with after installing and compare, golf clubs be that the moment of inertia of basic point does not change with the handle, thereby, even the very little striker of strength also can the bigger golf clubs of operating weight.That is, for the striker, even the bigger golf clubs of operating weight, the same hitting distance in the time of also can obtaining to use lighter golf clubs.In addition,, can bat, thereby can prevent ball-hitting quality relatively poor (hitting partially) with correct and stable track owing to increased the whole weight of golf clubs.

Yet, if be employed in the such method of weight member is installed on the handle, when grasping, can feel uncomfortable, and the outward appearance of handle is also relatively poor.Thereby proposing in the prior art has a kind of like this technology,, in handle itself, adds the auxiliary material (Japanese patent of invention disclose communique spy open put down 11-319172) of metal dust etc. that is.This method mainly is applicable to elastomers such as rubber; After the half member of the semicircle tubular of the part (rear side part) that the half member of the semicircle tubular of the part (club head side sections) in the formation bar portion central axis outside is inboard with constituting bar portion central axis is formed separately; Dock each other and bond together, behind the joint, the composition surface of halved body parts is the plane through central axis; A half member is a club head side halfbody, and another is the rear side halfbody that is positioned at its back side.And, constitute the metal material that contains forms such as metal dust in the half member of inside part, thus its weight ratio to constitute the half member of Outboard Sections big, and about roughly big 5～30g.In addition, can make the half member that constitutes inside part contain metal dust, also can make it contain metallic fiber or metallic plate.And,, can wherein, preferably use tungsten for tungsten, titanium, aluminium, nickel, boron, Ti-Ni alloy, lead, copper, silver, gold and mild steel etc. as employed metal.

In patent documentation 3 (the clear 62-9476 of the real hope of Japanese Utility Model patent application), disclose a kind of like this golf club handle; Promptly; Be installed in the double-decker of handle in the bar portion for constituting by internal layer parts and outer component; The whole length of the length of internal layer parts and handle is suitable, and is made up of the material softer than outer component.In patent documentation 4 (the clear 62-82066 of the real hope of Japanese Utility Model patent application), disclose a kind of like this golf club handle; Promptly; The whole length of the length of internal layer parts and handle is suitable, and is made up of the material harder than outer component, thereby can improve the grasping sensation of handle.

General striker with its axle center as square stance, holds the head end of handle with another with a cardinal extremity (near the end of hand) that holds handle when holding the handle of golf clubs, experienced the sensation of batting by this palm of holding the hand of head end.Thereby; If the handle quality is softer, then be difficult to impression batting sensation, if the harder words of handle quality then can feel uncomfortable; And, on hand wrist and ancon are caused adverse effect thereby have the another that stronger vibration too much is delivered to as the axle center of square stance.

The handle thatpatent documentation 3 is put down in writing has that the hand of holding its head end is difficult catches batting and feel that such shortcoming,patent documentation 4 disclosed handles have the feel of holding cardinal extremity and have bigger vibration to discomfort and square stance and be passed to such shortcomings such as ancon.

In addition, be very important to the grip of the handle of golf clubs to height, the distance of flight and the control of heading of batting.And; In the grip of handle; No matter Vardon grip, interlocking-type holding rod method etc., be any if being arranged, holding the cardinal extremity of holding handle in hand with one and under the situation as the axle center of square stance; Thereby the thumb of this hand is by the stability that on handle, keeps golf clubs, and the direction of definite golf clubs.

And, a kind of like this handle (with reference to patent documentation 5) has also been proposed, promptly in the prior art; Adopt this handle; The hand of head end that can enough grasping handles captures the sensation of batting preferably, and the hand of holding the cardinal extremity of handle has comfortable sensation, and does not have wrist or ancon etc. that stronger vibration is delivered to this hand; In addition, thus can prevent Draw and the miss that square stance produces energetically through supporting to the finger tripe of thumb.The structure of the handle of such golf clubs does; This handle is made up of internal layer parts and outer component; The position that the internal layer parts are positioned at the base end side of this handle is formed by the material softer than outer component, and the position of the head end side that is positioned at handle of internal layer parts is formed by the material harder than outer portion.

In addition, be not only the handle of rubber system, record is the handle of silicones system in the patent documentation 4.Angular deviation when face and the ball that adopts this handle can suppress club head bumps against.Thought in the past that the deviation of direction of stroke mainly was the generation of reversing owing to bar portion.Yet, also depart from the direction that the striker estimates sometimes even improve the torsional rigid direction of stroke of this bar portion.When this phenomenon of research produces reason; Noticed the handle that constitutes golf clubs than the especially high resilience of bar portion, that is, though the impulsive force that square stance produces can make bar portion produce torsional deflection; Yet; Angular deviation when the face of club head and ball bump against has much relations with the handle strain that the impulsive force that is produced by square stance causes, and according to such result of study, proposes the golf club handle that has patent documentation 6 to be put down in writing.

The glof club head that patent documentation 6 is put down in writing has tubular inner part and tubular outside parts with handle; The tubular inner part is formed by the 1st resin; Tubular outside parts are formed by the 2nd low resin of hardness ratio the 1st resin; And tubular outside parts serve as to insert inserts with the tubular inner part, coat the tubular inner part outside through injection mo(u)lding.In addition, on the outer peripheral face of tubular inner part, be formed with the engaging protrusion that fastens with tubular outside parts, engaging protrusion is provided with a plurality of, and in the 1st spacing setting of upwards being separated by in week, the 2nd spacing setting of being separated by in the longitudinal direction.

The prior art document

Patent documentation

Patent documentation 1: the open communique spy of Japanese patent of invention opens flat 6-142244

Patent documentation 2: the open communique spy of Japanese patent of invention opens flat 11-319172

Patent documentation 3: the clear 62-9476 of the special hope of Japanese Utility Model patent application

Patent documentation 4: the clear 62-82066 of the special hope of Japanese Utility Model patent application

Patent documentation 5: No. the 2533541st, Japanese Utility Model license communique

Patent documentation 6: the open communique spy of Japanese patent of invention opens 2010-188019

Invent technical problem to be solved

The invention of adoptingpatent documentation 2 to be put down in writing; The half member that constitutes bar portion central axis inside part is heavier than the part (club head side sections) that constitutes the bar portion central axis outside; Thereby produce weight difference at the two; This weight difference is about 5～30g, preferably about 10～25g, through setting weight smaller that such weight difference can make outside portion and the inside portion of the whole bar portion central axis of golf clubs; The stability of square stance is better, thereby has improved the operability of club, the stability of batting.If above-mentioned weight difference less than 5g, then can not obtain preferable effect, thereby if surpass the excessive balance that influences the integral body of golf clubs of weight that 30g then can make handle.

In this prior art constructions; In the half member that metal dust (for example tungsten powder) is added into the rubber system that constitutes inside part; With mix rub metal dust the thing vulcanization forming to elastomeric material, thereby the shaping thing that obtains like this is connected the handle that forms tubular on the half member in the outside, yet; When carrying out vulcanization forming, need metallic fiber correctly be arranged in the mould, and this needs spended time.

So; Because the torsional rigid of the half member in inboard and the outside is also inequality; Thereby very different in the torsional deflection of square stance handle in inboard half part and half part place, the outside, this might cause the striker not bat to the direction of being estimated, in addition; Grasping sensation on each half member is also inequality, thereby the striker who has can feel uncomfortable.

The handle ofpatent documentation 5 records can solve the deficiency that handle had that

patent documentation

3,4 is put down in writing; The hand (right-handed person is left hand) that is used as the axle center of batting is held the cardinal extremity of handle; Because the inner part that is formed by soft material is easy to generate distortion, thereby handle is lived in grasping effectively, and the sensation of grasping is better; In addition; Batting sensation can be well through on the hand (right hand) that is passed to the head end of holding handle on the inner part that is formed by hard material, yet the grasping sensation of the handle that thispatent documentation 5 is put down in writing and the accuracy of direction of stroke also need further raising.

The handle that patent documentation 6 is put down in writing not is a rubber system, but silicones makes, with comparing of rubber system; Has better torsional rigid; Yet,, the solvent (white gas) of usefulness is installed and is not easy volatilization if when being installed in the bar portion; Cut off handle and observe itself and the connecting portion of bar portion in that one week of handle back is installed, find that the inner peripheral surface of handle remains moisture state (solvent fully volatilizees).Thereby bar portion and silicones make and are difficult to have preferable bonding force between the handle.

In addition, sell on the market that outward appearance is arranged is the handle of multiple color, mix (influence mutually) easily mutually in the junction color of the rubber part of different colours; Thereby make the color of intersection fuzzyyer, the handle that the boundary of two kinds of colors is done does not very clearly also occur, therefore; Hope to have a kind of different rubber of color that uses; Can easily do the boundary of two kinds of colors very clearly demarcated, and effect that can clear and definite right-hand man, the handle that has improved its aesthetic property in addition occurs.

Summary of the invention

In view of this, the 1st purpose of the present invention is, a kind of handle for golf club is provided, and adopts this handle, can realize counterweigh, improves the performance that swings, the angular deviation of the face that prevents club head during with the ball collision, and easy to manufacture and grasping is felt good.

The 2nd purpose of the present invention is, provides a kind of and can improve the engaging force of accuracy, reinforcement and the bar portion of grasping sensation and direction of stroke, the very clearly demarcated handle for golf club in boundary of color.

In order to achieve the above object; The handle for golf club that the present invention the 1st aspect relates to is to have inner part and the such double-decker of outside parts; Said inner part is tubular and is made up of the bigger rubber composition of proportion; Said outside parts are by constituting than the little rubber composition of said inner part proportion, and the length of said inner part is shorter than the length of said outside parts.

In addition; In order to achieve the above object; The handle for golf club that the present invention the 2nd aspect relates to is inner part and the such double-decker of outside parts with cylindric rubber system, and the tungsten sheet that thickness is 0.2～2.0mm (sheet material of tungstenic) is installed between said inner part and the said outside parts.Self-evident, the tungsten sheet not only can be installed in back side portion, also can be installed in upper surface.In addition, the present invention is preferred, and said tungsten sheet uses is that tungsten powder is sneaked into the proportion that forms behind the thermoplastic resin material at the product more than 8.

Also have; In order to achieve the above object; The handle for golf club that the present invention the 4th aspect relates to covers the double-decker that forms on the higher rubber system tubular inner part of hardness for the tubular outside parts by rubber system; The length of said tubular inner part is than the long 1～4mm of half length of handle total length, and said tubular inner part is harder than said tubular outside parts.On the periphery of said tubular inner part, form a plurality of vertically prominent muscle vertically from base end side, these a plurality of vertically prominent muscle are upwards separated by a certain interval in week, and its length be said inner part total length 70%～80%.Form at these vertically prominent muscle of covering of said tubular outside parts and separated by a certain intervally vertically on the outer peripheral face of part of positions be formed with a plurality of circumferential slots.The said axial groove of ratio of parts more is formed with a plurality of cannelures on the outer peripheral face near the head end side in the said tubular outside.

[effect of invention]

The handle for golf club that the 1st aspect relates to; For having inner part and the such double-decker of outside parts; Said inner part is tubular and is made up of the bigger rubber composition of proportion that said outside parts are by constituting than the little rubber composition of said inner part proportion.

The length of said inner part is shorter than the length of said outside parts in addition.Said inner part contains barium sulfate and metal dust, and its proportion is 1.3～1.6.Thereby; The inside portion constitutes the weight member the same with prior art; Even also becoming, the golf clubs that weight is lighter swings easily, and the feeling good of grasping, can prevent that the torsional deflection that square stance produces from making the facial collision angle of ball and batting produce deviation.

The handle for golf club that adopts the 2nd aspect to relate to; Make on the so double-deck handle of inner part and outside parts having rubber cylindraceous; Because between inner part and the outside parts tungsten sheet that thickness is 0.2～2.0mm is installed, thereby by, constitute the weight member the same by this tungsten sheet with prior art; Even also becoming, the golf clubs that weight is lighter swings easily; And outward appearance is also better, thereby the protuberance that the back side portion of installation tungsten sheet can produce to a certain degree has anti-skidding function, can prevent that square stance from making the facial collision angle generation deviation of ball and batting because of handle produces torsional deflection.In addition, in the prior art, use dusty material to form weight member, before vulcanizing, processing is sneaked into and formed to powder, then powder can produce and disperse and not mixing fully.And in the present invention, use be the tungsten sheet, thereby can be easily according to the rules weight add in the handle, thereby make the change (deviation) of handle weight less (for a plurality of handles of manufacturing).In addition, because the tungsten sheet uses thermoplastic resin, thereby when vulcanizing rubber being heated to about 120 ℃～160 ℃, the tungsten sheet can produce suitable distortion (bending) according to the shape of mould between rubber.

The handle for golf club that adopts the present invention the 3rd aspect to relate to, this handle covers the double-decker that forms on the higher rubber system tubular inner part of hardness for the tubular outside parts by rubber system.The length of said tubular inner part is than the long 1～4mm of half length of handle total length.On the periphery of said tubular inner part, form a plurality of vertically prominent muscle vertically from base end side, these a plurality of vertically prominent muscle are upwards separated by a certain interval in week, and its length be said inner part total length 70%～80%.Head end side edge in the part that forms these vertically prominent muscle circumferentially is formed with annular projection.Be formed with a plurality of circumferential slots on the outer peripheral face of the 1st tubular outside parts in the zone between covering the part that forms these vertically prominent muscle and being formed on from the cardinal extremity to the annular projection, these a plurality of circumferential slots are separated by a certain interval in the axial direction.Said tubular outside parts also comprise the 2nd tubular outside parts, and said the 2nd tubular outside parts cover the head end sidepiece from annular projection of said tubular inner part, and are formed up to the head end of handle from said annular projection.On the outer peripheral face of said the 2nd tubular outside parts, be formed with a plurality of cannelures.Said the 1st tubular outside parts are different with the color of said the 2nd tubular outside parts.Thereby, can prevent that by the circumferential slot and the vertical combination of prominent muscle whole handle from twisting, and because the existence of circumferential slot, thereby can offset by the counter-force on the base end side at the centrifugal force that the square stance club head produces.Thereby; The grasping sense of handle base end side (right-handed person's words are the part of left hand grasping) is harder than the grasping sense of head end side (part that the right hand is being held); The torsional deflection of the part (cardinal extremity) of the left hand institute grasping in the axle center of formation square stance is less; Can guarantee the accuracy of direction of stroke, and because tubular outside parts are softer, thereby be difficult to make batting vibration deleterious impact.In addition; The tubular inner part is that rubber makes; When using general installation to be fixed on handle in the bar portion with solvent (white gas) with double faced adhesive tape, solvent is promptly volatilizable at short notice, with roughly realizing making bar portion and handle to fix with the interior time half a day.In addition; Because the both sides of the annular projection of parts coat different the 1st tubular outside parts of color and the 2nd tubular outside parts in the tubular outside; Thereby the boundary of two kinds of colors is clearly demarcated, has improved aesthetic property, makes the people recognize that consumingly left hand shares different effects respectively with the right hand.

The handle for golf club that adopts the present invention the 4th aspect to relate to, this handle covers the double-decker that forms on the higher rubber system tubular inner part of hardness for the tubular outside parts by rubber system.The length of said tubular inner part is than the long 1～4mm of half length of handle total length, and said tubular inner part is harder than said tubular outside parts.On the periphery of said tubular inner part, form a plurality of vertically prominent muscle vertically from base end side, these a plurality of vertically prominent muscle are upwards separated by a certain interval in week, and its length be said inner part total length 70%～80%.Form at these vertically prominent muscle of covering of said tubular outside parts and separated by a certain intervally vertically on the outer peripheral face of part of positions be formed with a plurality of circumferential slots.The said axial groove of ratio of parts more is formed with a plurality of cannelures on the outer peripheral face near the head end side in the said tubular outside.Thereby, can prevent reversing of whole handle by circumferential slot and vertical combination of dashing forward muscle, and because the existence of circumferential slot, thereby can be by the counter-force counteracting at base end side at the centrifugal force of square stance club head generation.Thereby; The grasping sense of handle base end side (right-handed person's words are the part of left hand grasping) is harder than the grasping sense of head end side (part that the right hand is being held); The torsional deflection of the part (cardinal extremity) of the left hand institute grasping in the axle center of formation square stance is less; Can guarantee the accuracy of direction of stroke, and because tubular outside parts are softer, thereby be difficult to make batting vibration deleterious impact.In addition; The tubular inner part is a rubber system; When using general installation to be fixed on handle in the bar portion with solvent (white gas) with double faced adhesive tape, solvent is promptly volatilizable at short notice, with roughly realizing making bar portion and handle to fix with the interior time half a day.

Description of drawings

Fig. 1 is the longitudinal sectional view of the structure of expression the 1st embodiment of the present invention;

Fig. 2 is the cutaway view of A-A line among Fig. 1;

Fig. 3 is the topology view of expression inner part and outside parts;

Fig. 4 is the topology view of the variation of the 1st embodiment;

Fig. 5 is the longitudinal sectional view of the completion article of structure among Fig. 4;

The key diagram that Fig. 6 is shaped and processes for handle;

Fig. 7 is the topology view of the present invention's the 2nd embodiment;

Fig. 8 is the longitudinal sectional drawing through handle back side portion;

Fig. 9 is the topology view of the variation of the 2nd embodiment;

Figure 10 is the key diagram of vulcanization forming processing;

Figure 11 is the accompanying drawing of the manufacturing approach of explanation tungsten sheet;

The tubular outside parts that Figure 12 relates to for expression the 3rd embodiment and the oblique view of tubular inner part;

Figure 13 is the front view of tubular outside parts;

Figure 14 is for making the cutaway view of the handle of accomplishing;

The cutaway view of Figure 15 for processing for the shaping that tubular outside parts are described;

The tubular outside parts that Figure 16 relates to for expression the 4th embodiment and the oblique view of tubular inner part;

Figure 17 is the front view of the tubular inner part of this embodiment;

Figure 18 is the cutaway view of the handle accomplished of the manufacturing of this embodiment;

Description of reference numerals

1 inner part; 2 outside parts; 20 barium sulfate, metal dust; 11 inner part; 12 outside parts; 120 tungsten sheets; 21 tubular inner part; 22 tubulars outside parts; 22A the 1st tubular outside parts; 22B the 2nd tubular outside parts; 24 vertically prominent muscle; 26 circumferential slots; 26 cannelures; 210 annular projections; 31 tubular inner part; 32 tubulars outside parts; 34 vertically prominent muscle; 36 circumferential slots; 38 cannelures.

The specific embodiment

Specific embodiments of the invention is carried out detailed explanation with reference to the accompanying drawings.

The 1st embodiment

Like Fig. 1～shown in Figure 3, golf club handle has inner part 1 cylindraceous and outside parts 2, and inner part 1 is a rubber part with outside parts 2.About manufacturing process, for example, when initial shaping inner part 1, with barium sulfate 20 (with/or metal dust 20) mix and rub in the rubber composition and sulfuration forms inner part 1, that is, form the bigger rubber composition of proportion.The outside parts 2 that are shaped afterwards make it be coated on the outside of inner part 1.Independent inner part 1 has been shown among Fig. 3 and on inner part 1, has formed outside parts 2 these two kinds of structures, this is for the convenience on explaining.In actual conditions, thus outside parts 2 in a single day be formed will be coated on constitute on the inner part 1 as a whole.In addition, Fig. 2 is along the cutaway view of A-A line among Fig. 1, and bar portion 21 has been shown among the figure.Inner part is the bigger rubber composition of proportion; Outside parts are the less rubber composition of proportion, owing to added barium sulfate or metal dust in the rubber composition of formation inner part, thereby its rubber composition is more crisp; Sense of touch is relatively poor, thereby it is configured in the inboard.In addition, inner part 1 all is before sulfuration, to form sheet component with outside parts 2, and these sheet components are shaped through compression molding simultaneously.

Rubber as moulding material; Its main component is natural rubber (NR); For example; Can get NR80～100 weight portions, EPDM 0～20 weight portion, antiaging agent 1 weight portion, stearic acid 1 weight portion, carbon black 10～30 weight portions, softening agent 5～10 weight portions, processing aid 2 weight portions, zinc oxide 5 weight portions, vulcanization accelerator 1～2 weight portion, vulcanization accelerator auxiliary agent 0.5 weight portion, sulphur 1～2 weight portion and obtain rubber composition after being combined together, mix to rub in this rubber composition and carry out vulcanization forming and form handle shape thereby afterwards 15 weight portions are got barium sulfate 20.In inner part 1 and outside parts 2, thereby can make inner part 1 form firmlyer through the composition that changes rubber composition.Outside parts 2 preferably; Rubber composition by containing diene rubber 45～90 weight portions, ethylene-propylene bipolymer and ethylene-propylene-diene terpolymers 5～30 weight portions, chlorinated scoline 5～25 weight portions forms, and it is at least a that diene rubber is preferably selected from natural rubber, isoprene rubber, SBR styrene butadiene rubbers, nitrile butadiene rubber and chloroprene rubber.Use such rubber composition (sheet rubber 15 among Fig. 6 also is like this) thus make outside parts 2 according to carry out compression molding identically with method shown in Figure 6, the outside parts 2 that obtain like this can be anti-skidding and be had good wearability and an ageing resistance.In addition, in inner part 1, mix and rub into tungsten powder 20, form outside parts 2 above that thereby afterwards resulting product is inserted can vulcanize in the curing metal mold.In addition,, can use silica or talcum etc. to replace carbon black as reinforcing agent about the formation of handle cardinal extremity 3, thereby and add pigment colouring.In addition, in order to improve hardness, also can add styrene-content is the resin of SBR (High styrene butadiene-styrene rubber) 5～20 weight portions more than 50%.Except tungsten powder 20, also can use the metal dust of copper or lead etc.

In above-mentionedinner part 1, sneaked intobarium sulfate 20 andmetal dust 20, and the cooperation ratio of not sneaking into the complex of these materials is that basic cooperation ratio is illustrated in the table 1.Embodiment 1-embodiment 7 is illustrated respectively in the table 2-table 8.The weight of the handle ofembodiment 1 is about 50g.

Table 1

Unit in the last table 1 is a weight portion, also is like this in following embodiment.About the evaluation to " rubber mixes the transaction capabilities of rubbing ", " ◎ " is very good, and " zero " is that better " △ " is poor for slightly.

[embodiment 1]

Table 2

The compounding ingredient of rubber composition	Match ratio
		Natural rubber (NR)	85
Ethylene propylene diene rubber (EPDM)	15
		Antiaging agent	1
Stearic acid	1
		Carbon black	15
Silica (SiO₂)	0
		Barium sulfate	25
Softening agent	10
		Processing aid	2
Zinc oxide	5
		Vulcanization accelerator	1.5
Vulcanization accelerator additive	0.5
		Sulphur	1.8
Proportion	1.6
		Rubber mixes the transaction capabilities of rubbing	△
The increase of handle weight	Increase 10g approximately

[embodiment 2]

Table 3

The compounding ingredient of rubber composition	Match ratio
		Natural rubber (NR)	85
Ethylene propylene diene rubber (EPDM)	15
		Antiaging agent	1
Stearic acid	1
		Carbon black	15
Silica (SiO₂)	0
		Barium sulfate	20
Softening agent	10
		Processing aid	2
Zinc oxide	5
		Vulcanization accelerator	1.5
Vulcanization accelerator additive	0.5
		Sulphur	1.8
Proportion	1.5
		Rubber mixes the transaction capabilities of rubbing	○
The increase of handle weight	Increase 8g approximately

[embodiment 3]

Table 4

The compounding ingredient of rubber composition	Match ratio
		Natural rubber (NR)	85
Ethylene propylene diene rubber (EPDM)	15
		Antiaging agent	1
Stearic acid	1
		Carbon black	15
Silica (SiO₂)	5
		Barium sulfate	15
Softening agent	10
		Processing aid	2
Zinc oxide	5
		Vulcanization accelerator	1.5
Vulcanization accelerator additive	0.5
		Sulphur	1.8
Proportion	1.4
		Rubber mixes the transaction capabilities of rubbing	○
The increase of handle weight	Increase 7g approximately

[embodiment 4]

Table 5

The compounding ingredient of rubber composition	Match ratio
		Natural rubber (NR)	85
Ethylene propylene diene rubber (EPDM)	15
		Antiaging agent	1
Stearic acid	1
		Carbon black	15
Silica (SiO₂)	5
		Barium sulfate	10
Softening agent	10
		Processing aid	2
Zinc oxide	5
		Vulcanization accelerator	1.5
Vulcanization accelerator additive	0.5
		Sulphur	1.8
Proportion	1.3
		Rubber mixes the transaction capabilities of rubbing	○
The increase of handle weight	Increase 5g approximately

[embodiment 5]

Table 6

The compounding ingredient of rubber composition	Match ratio
		Natural rubber (NR)	85
Ethylene propylene diene rubber (EPDM)	15
		Antiaging agent	1
Stearic acid	1
		Carbon black	15
Silica (SiO₂)	5
		Barium sulfate	5
Softening agent	10
		Processing aid	2
Zinc oxide	5
		Vulcanization accelerator	1.5
Vulcanization accelerator additive	0.5
		Sulphur	1.8
Proportion	1.2
		Rubber mixes the transaction capabilities of rubbing	◎
The increase of handle weight	Increase 2g approximately

[embodiment 6]

Table 7

The compounding ingredient of rubber composition	Match ratio
		Natural rubber (NR)	85
Ethylene propylene diene rubber (EPDM)	15
		Antiaging agent	1
Stearic acid	1
		Carbon black	15
Silica (SiO₂)	5
		Barium sulfate	5
Tungsten powder	2
		Softening agent	10
Processing aid	2
		Zinc oxide	5
Vulcanization accelerator	1.5
		Vulcanization accelerator additive	0.5
Sulphur	1.8
		Proportion	1.5
Rubber mixes the transaction capabilities of rubbing	○
		The increase of handle weight	Increase 8g approximately

[embodiment 7]

Table 8

The compounding ingredient of rubber composition	Match ratio
		Natural rubber (NR)	85
Ethylene propylene diene rubber (EPDM)	15
		Antiaging agent	1
Stearic acid	1
		Carbon black	15
Silica (SiO₂)	5
		Barium sulfate	5
Tungsten powder	1
		Softening agent	10
Processing aid	2
		Zinc oxide	5
Vulcanization accelerator	1.5
		Vulcanization accelerator additive	0.5
Sulphur	1.8
		Proportion	1.4
Rubber mixes the transaction capabilities of rubbing	○
		The increase of handle weight	Increase 5g approximately

Above-mentionedbarium sulfate 20 is comprised in the white filler, uses its purpose to be, improves the performance of rubber, for example improves the rerum natura of vulcanized rubber and does not have the processing characteristics through the rubber of over cure, is used in addition reduce cost and gain in weight.As the black filler, use be carbon black.Employed barium sulfate is precipitable barium sulfate, and its particle does not have constant shape, and is very thin and softer, and proportion is 4.3.In addition, be 1.8 as the proportion of the carbon black of filler, silica (SiO₂) proportion be 2.1, the proportion of calcium carbonate is 2.6, the proportion of tungsten powder is 19.3.In the related embodiment of table 7 and table 8, can only sneak into the compatibility of rubber preferablybarium sulfate 20 realize increasing the weight of handle as filler, yet, also can sneak into a spot of tungsten powder and gain in weight.In addition, tungsten powder (metal dust 20) uses be couplingization processing to be used for preventing oxidation.

On above-mentionedinner part 1, on outer peripheral face, be formed with a plurality of verticallyprominent muscle 4 near handle base endpart 3 one sides, this length of vertically dashing forwardmuscle 4 is 8～11mm, and thickness (rising height) is 0.2～0.6mm, and width is 0.6～1.5mm.And adjacent two verticallyprominent muscle 4 are at the 3mm that is spaced apart of handle base endpart 3 one sides.Above-mentioned handle base endpart 3 is by forming thaninner part 1 hard rubber composition, thus be connected withinner part 1 constitute as a whole.In addition, be formed withprominent muscle 5 in the head end side of inner part 1 (occupying 1/4th to 1/5th length of the total length of inner part 1).

Be formed with a plurality of circumferential slots 6 on the outer peripheral face in the zone of the part that is formed with verticallyprominent muscle 4 of the above-mentionedinner part 1 of coating of outside parts 2.These circumferential slots 6 are thinner, and its groove width is about 0.1～0.3mm, the spacing parallel arranging setting about 1.5mm of being separated by in the axial direction.Be formed with a plurality of oblique grooves 7 with these circumferential slots 6 with intersecting.These grooves 6 and 7 are used for anti-skidding, and in addition, circumferential slot 6 also is used on the handle part, being easy to produce the action of centrifugal force power that is used to offset club head at square stance.In addition, the ratio circumferential slot 6 ofside component 2 more is formed with a plurality of cannelures 8 on the outer peripheral face near the head end side outside, and is formed withoblique groove 9 with these cannelures 8 with intersecting.

The total length of above-mentionedinner part 1 will be lacked 250mm than the total length (comprising handle base end part 3) of handle.In addition, the part of half the length 4cm that surpasses the handle total length ofinner part 1 is thin more the closer to head end side (peristome side) wall thickness of handle, and this is in order to make whole parts be difficult to be split up into two-layer.In addition, eveninner part 1 forms necessary above length, the function of handle can not be improved again.

The gap S that between the circumferential slot 6 ofinner part 2 and cannelure 8, has a little₂, this S₂Corresponding to the gap S1 that forms near its head end side on theinner part 1, S in the gap₂Both sides up and down (left and right sides among Fig. 3) be formed withcannelure 10.

Shown in Figure 4 is a variation of the 1st embodiment; Wherein, Structure same as described above adopts identical sign flag; As shown in Figure 4, the part that is formed with vertically prominent muscle 4 the 1st outside parts 2A, that coat above-mentioned inner part 1, promptly be formed with a plurality of circumferential slots 6 on the outer peripheral face in the zone of the part except handle base end part 3 and annular projection 1110.These circumferential slots 6 are thinner, and its groove width is about 0.1～0.3mm, the spacing parallel arranging setting about 1.5mm of being separated by in the axial direction.Be formed with a plurality of oblique grooves 7 with these circumferential slots 6 with intersecting.These grooves 6 and 7 are used for anti-skidding, and in addition, circumferential slot 6 also is used on the handle part, being easy to produce the action of centrifugal force power that is used to offset club head at square stance.In addition, more be formed with a plurality of cannelures 8 on the outer peripheral face near the head end side at the annular projection 1110 of the ratio inner part 1 of the 2nd outside parts 2B, and be formed with oblique groove 9 with intersecting with these cannelures 8.The 1st outside parts 2A and the 2nd outside parts 2B that are separated by annular projection 1110 use color rubber inequality.

Rely on various colors can differentiate out the 1st outsideparts 2A and the 2nd outside parts 2B clearly, and the rubber hardness of the two also form differently atannular projection 10 places.Preferably make the 2nd outside parts 2B (the head end side) harder than the 1stoutside parts 2A (base end side).The wall thickness of the 2nd inner part 2B is thinner, and its hardness can be 45～55, and preferably 35～45, like this when grasping, can feel the verticallyprominent muscle 4 of inner part 1.And implementation method for example can be higher thanoutside parts 2 for the match ratio of the carbon black that makesinner part 1 and silica.

Above-mentioned handle base endpart 3 is different with main part (part except the handle base end part 3) color ofinner part 1, forms with the sulfuration of color material different, and then its meeting of having a common boundary produces the change as ripple, is difficult to do clearly thereby have a common boundary.

The generation type of the different colours of above-mentioned the 1st outsideparts 2A and the 2nd outside parts 2B does; Earlier forminner part 1 through injection molded; Be specially, thereby injected plastics material forms hollow bulb oninner part 1 aroundmandrel 11, and;Mandrel 11 is not extracted after the shaping, but theinner part 1 that will have amandrel 11 is inserted in the space that is surrounded bypatrix 12 and counterdie 13.At this moment, place tungsten sheet (not shown) in the place of the rear side that is positioned at inner part 1.And, as shown in Figure 6, be boundary withannular projection 10, the

different sheet rubber

14 and 15 of color on handle base end side and handle head end side volume.Make patrix 12 andcounterdie 13 matched moulds,

sheet rubber

14 and 15 is carried out compression molding processing, makesheet rubber 14 form the 1st outsideparts 2A,sheet rubber 15 forms the 2nd outside parts 2B.

With reference to the accompanying drawings the present invention's the 2nd embodiment is carried out detailed explanation.

Inner part cylindraceous 11 andoutside parts 12 andtungsten sheet 120 have been shown, andinner part 11 andoutside parts 12 are rubber system in Fig. 7.About manufacturing process, for example, after the first shapinginner part 11, the parts that are placed withtungsten sheet 120 are configured in the mould as insertion parts and are positioned at the back side ofinner part 11, theoutside parts 12 that are shaped afterwards make it be coated on the outside of inner part 11.Independentinner part 11 has been shown among Fig. 7 and oninner part 11, has formed outsideparts 12 these two kinds of structures.In addition, also can between the inner part of over cure (before the unshaped) is with rubber and the sheet rubber of outside parts with rubber, not put intotungsten sheet 120, the use compression molding is carried out vulcanization forming with mould.So, thustungsten sheet 120 is embedded in constitute between theoutside parts 12 and theinner part 11 as a whole.

Rubber as moulding material; Its main component is natural rubber (NR); For example; Can get NR80～100 weight portions, SBR (butadiene-styrene rubber) or EPDM0～20 weight portions, antiaging agent 1 weight portion, stearic acid 1 weight portion, carbon black 10～30 weight portions, softening agent 5～10 weight portions, processing aid 2 weight portions, zinc oxide 5 weight portions, vulcanization accelerator 1～2 weight portion, vulcanization accelerator auxiliary agent 0.5 weight portion, sulphur 1～2 weight portion obtains rubber composition after being combined together, and forms handle thereby afterwards this rubber composition is carried out vulcanization forming.In inner part 11 and outside parts 12, can change the composition of rubber composition.Can make inner part 11 form firmlyer this moment.Thereby it is the SBR more than 50% that inner part 11 can be used styrene-content.Outside parts 12 preferably; Rubber composition by containing diene rubber 45～90 weight portions, ethylene-propylene bipolymer and ethylene-propylene-diene terpolymers 5～30 weight portions, chlorinated scoline 5～25 weight portions forms, and it is at least a that diene rubber is preferably selected from natural rubber, isoprene rubber, SBR styrene butadiene rubbers, nitrile butadiene rubber and chloroprene rubber.Use such rubber composition (sheet rubber 115 among Figure 10 also is like this) thus according to method shown in Figure 10 carry out identically compression molding make the outside parts 12; The outside parts 12 that obtain like this have the higher coefficient of kinetic friction; Can be anti-skidding and have good wearability and ageing resistance, thereby its durability better can have long service life.In addition, lower temperature resistance is also better, and temperature is also less to each Effect on Performance, the difficult generation phenomenon that is clamminess, thus grasping has good grasping sense tightly.In addition, for the inner part 11 that disposes tungsten sheet 120 is carried out vulcanization forming, can be with after component configuration be in mould, above that with outside parts 2 vulcanization formings.In addition,, can use silica or talcum etc. to replace carbon black as reinforcing agent about the formation of handle cardinal extremity 13, thereby and add pigment colouring.In addition, in order to improve hardness, also can add styrene-content is SBR (High styrene butadiene-styrene rubber) 5～20 weight portions more than 50%.

On above-mentionedinner part 11, on outer peripheral face, be formed with a plurality of verticallyprominent muscle 14 near handle base endpart 13 1 sides, this length of vertically dashing forwardmuscle 14 is 8～11mm, and thickness (rising height) is 0.2～0.6mm, and width is 0.6～1.5mm.And, two the be spaced apart 3mms ofmuscle 14 that vertically dash forward in handle base endpart 13 1 sides.Above-mentioned handle base endpart 13 is by forming thaninner part 11 hard rubber compositions, thus be connected withinner part 11 constitute as a whole.In addition, be formed withprominent muscle 15 in the head end side of inner part 11 (occupying 1/4th to 1/5th length of the total length of inner part 11).

Above-mentioned tungsten sheet 120 is sneaked into tungsten powder by granular thermoplastic resin material and is formed processing (injection moulding) and form, and its thickness is 0.2～2.0mm, and proportion is 8～13.For example, thickness is that 2mm, width are that 5mm, length are that the proportion of the tungsten sheet 120 of 100mm is 12, and weight is 12g.In addition, as same proportion, with the tungsten sheet 120 of weight, also can be thickness 1mm, width 10mm, length is 100mm's.Preferably use proportion to be used as weight member at the such tungsten sheet 120 more than 11.In addition, use such tungsten sheet 120, can obtain the same or, but need use, abandon management needn't be when using lead than its good counterweight performance with lead.In addition, the softness of such tungsten sheet 120 can freely bend, and can be close to curved surface or complex-shaped position (being the position (position with concaveconvex shape) that is formed with vertically prominent muscle 4 of inner part 11 in this embodiment).In addition, such tungsten sheet 120 can be processed by enough scissors, and is thermoplastic, thereby thereby can it matched with complicated shape through heating.Employed thermoplastic resin preferably, vinyl resin, carbolic acid are resin, polyethylene-based resin, olefin-based elastomer, styrene series elastomer.In addition, on tungsten sheet 120, form porose 120A and joint-cutting 120B, tungsten sheet 120 more firmly is fixed between inner part 11 and the outside parts 12.Certainly, also can adopt the tungsten sheet that porose 120A and joint-cutting 120 are not set that the side's in porose 120A and the joint-cutting 120 tungsten sheet 120. perhaps only is set

The hardness of the JIS K 6253 formula A of above-mentioned handle base end part 13 (below be all the JIS standard) is 65～75, and the hardness ofinner part 11 is 65～75, and the hardness ofoutside parts 12 is 40～50.Such hardness number does not have particular determination, can makeoutside portion part 12 thaninner part 11 softnesses.

Be formed with a plurality ofcircumferential slots 16 on the outer peripheral face in the zone of the part that is formed with verticallyprominent muscle 14 of the above-mentionedinner part 11 of coating of outside parts 12.Thesecircumferential slots 16 are thinner, and its groove width is about 0.1～0.3mm, the spacing parallel arranging setting about 1.5mm of being separated by in the axial direction.Be formed with a plurality ofoblique grooves 17 with thesecircumferential slots 16 with intersecting.These

grooves

16 and 17 are used for anti-skidding, and in addition,circumferential slot 16 also is used on the handle part, being easy to produce the action of centrifugal force power that is used to offset club head at square stance.In addition, theratio circumferential slot 16 ofside component 12 more is formed with a plurality ofcannelures 18 on the outer peripheral face near the head end side outside, and is formed withoblique groove 19 with thesecannelures 18 with intersecting.

The total length of above-mentionedinner part 11 will be lacked 250mm than the total length (comprising handle base end part 13) of handle.In addition, the part of half the length 4cm that surpasses the handle total length ofinner part 11 can increase the whole weight of handle.In addition, eveninner part 1 forms necessary above length, the function of handle can not be improved again.

The gap S that between thecircumferential slot 16 ofinner part 12 andcannelure 18, has a little₁₂, this S₁₂Corresponding to the gap S that forms near its head end side on theinner part 11₁₁, S in the gap₁₂Both sides up and down be formed withcannelure 110.

Shown in Figure 9 is a variation of the 2nd embodiment; Wherein, Structure same as described above adopts identical sign flag; As shown in Figure 9, the part that is formed with vertically prominent muscle 14 the 1st outside parts 12A, that coat above-mentioned inner part 11, promptly be formed with a plurality of circumferential slots 16 on the outer peripheral face in the zone of the part except handle base end part 13 and annular projection 110.These circumferential slots 16 are thinner, and its groove width is about 0.1～0.3mm, the spacing parallel arranging setting about 1.5mm of being separated by in the axial direction.Be formed with a plurality of oblique grooves 17 with these circumferential slots 16 with intersecting.These grooves 16 and 17 are used for anti-skidding, and in addition, circumferential slot 16 also is used on the handle part, being easy to produce the action of centrifugal force power that is used to offset club head at square stance.In addition, more be formed with a plurality of cannelures 18 on the outer peripheral face near the head end side at the annular projection 110 of the ratio inner part 11 of the 2nd outside parts 12B, and be formed with oblique groove 19 with intersecting with these cannelures 18.The 1st outside parts 2A and the 2nd outside parts 2B that are separated by annular protrusion 110 use color rubber inequality.

Rely on various colors can differentiate out the 1st outsideparts 12A and the 2nd outside parts 12B clearly, and the rubber hardness of the two also form differently atannular projection 110 places.Preferably make the 2nd outside parts 12B (the head end side) harder than the 1stoutside parts 12A (base end side).The wall thickness of the 2nd inner part 12B is thinner, and its hardness can be 45～55, and preferably 35～45, like this when grasping, can feel the verticallyprominent muscle 14 of inner part 11.And implementation method for example can be higher thanoutside parts 12 for the match ratio of the carbon black that makesinner part 11 and silica.

Above-mentioned handle base endpart 13 is different with main part (part except the handle base end part 13) color ofinner part 11, forms with the sulfuration of color material different, and then its meeting of having a common boundary produces the change as ripple, thereby is difficult to differentiate.

The generation type of the different colours of above-mentioned the 1st outsideparts 12A and the 2nd outside parts 12B does; Earlier forminner part 11 through injection molded; Be specially, thereby injected plastics material forms hollow bulb oninner part 11 aroundmandrel 111, and;Mandrel 111 is not extracted after the shaping, but theinner part 11 that will have amandrel 111 is inserted in the space that is surrounded bypatrix 112 and counterdie 113.At this moment,place tungsten sheet 120 in the place of the rear side that is positioned at inner part 11.And, shown in 10, be boundary withannular projection 110, the

different sheet rubber

114 and 115 of color on handle base end side and handle head end side volume.Make patrix 112 andcounterdie 113 matched moulds,

sheet rubber

114 and 115 is carried out compression molding processing, makesheet rubber 114 form the 1st outsideparts 12A,sheet rubber 115 forms the 2nd outside parts 12B.

Figure 11 is the accompanying drawing that is used to explain the manufacturing approach oftungsten sheet 20, as an example, the tungsten powder raw material is mixed with ratio more than the 90 weight % and thermoplastic elastomer (TPE) rub together, and can make its proportion is 8～13.Can form sheet through extrusion modling or injection mo(u)lding afterwards.

With reference to the accompanying drawings the present invention's the 3rd embodiment is carried out detailed explanation.

Tubularinner part 21 and tubularoutside parts 22 have been shown among Figure 12, and the two is all rubber part.About manufacturing process; For example; After initial shaping tubularinner part 21, this tubularinner part 21 is configured in the mould as insertion parts, thereby the 1st tubularoutside parts 22A and this tubularinner part 21 of the 2nd tubular outsideparts 22B coating are formed.Independent tubularinner part 21 has been shown among Figure 12 and oninner part 21, has formed tubularoutside parts 22 these two kinds of structures, this is for the convenience on explaining.In actual conditions, in a single day tubularoutside parts 2 are formed the tubularinner part 1 that will be coated on exceptannular projection 210.

Rubber as moulding material; Its main component is natural rubber (NR); For example; Can get NR80～100 weight portions, EPDM 0～20 weight portion, antiaging agent 1 weight portion, stearic acid 1 weight portion, carbon black 10～30 weight portions, softening agent 5～10 weight portions, processing aid 2 weight portions, zinc oxide 5 weight portions, vulcanization accelerator 1～2 weight portion, vulcanization accelerator auxiliary agent 0.5 weight portion, sulphur 1～2 weight portion and obtain rubber composition after being combined together, mix to rub in this rubber composition and carry out vulcanization forming and form handle thereby afterwards 15 weight portions are got barium sulfate 20.In tubular inner part 21 and tubular outside parts 22, thereby can make tubular inner part 21 form firmlyer through the composition that changes rubber composition.Outside parts 22 preferably; Rubber composition by containing diene rubber 45～90 weight portions, ethylene-propylene bipolymer and ethylene-propylene-diene terpolymers 5～30 weight portions, chlorinated scoline 5～25 weight portions forms, and it is at least a that diene rubber is preferably selected from natural rubber, isoprene rubber, SBR styrene butadiene rubbers, nitrile butadiene rubber and chloroprene rubber.Use such rubber composition, can have the higher coefficient of kinetic friction, can be anti-skidding and have good wearability and ageing resistance, thereby have long service life.In addition, in addition, lower temperature resistance is also better, and temperature is also less to each Effect on Performance, the difficult generation phenomenon that is clamminess, thus grasping has good grasping sense tightly.In addition,, can use silica or talcum etc. to replace carbon black as reinforcing agent about the formation of handle base end part 23, thereby and add pigment colouring.In addition, in order to improve hardness, also can add styrene-content is SBR (High styrene butadiene-styrene rubber) 5～20 weight portions more than 50%.

Shown in figure 13; On above-mentioned tubularinner part 21, on outer peripheral face, be formed with a plurality of verticallyprominent muscle 24 near handle base endpart 23 1 sides, this length of vertically dashing forwardmuscle 24 is 8～11mm; Thickness (rising height) is 0.2～0.6mm, and width is 0.6～1.5mm.And adjacent two verticallyprominent muscle 24 are at the 3mm that is spaced apart of handle base endpart 23 1 sides.Above-mentioned handle base endpart 23 is by forming thaninner part 21 hard rubber compositions, thus be connected withinner part 21 constitute as a whole.In addition, be formed withprominent muscle 25 in the head end side of inner part 21 (occupying 1/4th to 1/5th length of the total length ofinner part 21).Between the head end of the cardinal extremity of themuscle 25 of dashing forward and themuscle 24 of vertically dashing forward,, be formed with thick ring part 10A, the 10B of thickness (rising height) of verticallyprominent muscle 4 of wall ratio andprominent muscle 5 respectively in the both sides of thisprojection 210 along circumferentially being formed with annular projection 210.Annular projection 10 is bigger than the thickness of ring part 10A, 10B.

The hardness of the JIS K 6253 formula A of above-mentioned handle base end part 23 (below be all the JIS standard) is 65～75, and the hardness ofinner part 21 is 65～75, and the hardness ofoutside parts 22 is 40～50.Such hardness number does not have particular determination, can makeoutside portion part 22 thaninner part 21 softnesses.

The part that is formed with verticallyprominent muscle 24 the 1st outsideparts 22A, that coat above-mentioned tubularinner part 21, promptly be formed with a plurality ofcircumferential slots 26 on the outer peripheral face in the zone of the part except handlebase end part 23 and annular projection 210.Thesecircumferential slots 26 are thinner, and its groove width is about 0.1～0.3mm, the spacing parallel arranging setting about 1.5mm of being separated by in the axial direction.Be formed with a plurality ofoblique grooves 27 with thesecircumferential slots 26 with intersecting.These

grooves

26 and 27 are used for anti-skidding, and in addition,circumferential slot 26 also is used on the handle part, being easy to produce the action of centrifugal force power that is used to offset club head at square stance.In addition, more be formed with a plurality ofcannelures 28 on the outer peripheral face near the head end side at theannular projection 210 of the ratioinner part 21 of the 2ndoutside parts 22B, and be formed withoblique groove 29 with intersecting with these cannelures 28.The 1st outsideparts 22A and the 2ndoutside parts 22B that are separated byannular projection 210 use color rubber inequality.

The total length of above-mentionedinner part 21 will be grown 1～4cm than half of handle total length (comprising handle base endpart 23).In addition, the part of half the length 4cm that surpasses the handle total length ofinner part 1 can increase the whole weight of handle.In addition, eveninner part 21 forms necessary above length, the function of handle can not be improved again.

Rely on various colors can differentiate out the 1st outsideparts 22A and the 2ndoutside parts 22B clearly, and the rubber hardness of the two also form differently atannular projection 210 places.Preferably make the 2ndoutside parts 22B (the head end side) harder than the 1stoutside parts 22A (base end side).The wall thickness of the 2ndinner part 22B is thinner, and its hardness can be 45～55, and preferably 35～45, like this when grasping, can feel the verticallyprominent muscle 24 ofinner part 21.

Shown in figure 14, on handle base endpart 23, be formed withfitting portion 3A andflange part 3B,fitting portion 3A is chimeric and be fixed on the rear end of tubular inner part 21.The external diameter offlange part 3B is identical with the base end side external diameter of tubular outside parts 22.In hollow bulb that theinwall 21A by tubularinner part 21 surrounds and the hollow bulb that surrounds by theinwall 22C of the 2nd tubular outsideparts 22B, be inserted with unshowned bar portion, handle is installed in the bar portion.Fixedly being achieved in that promptly between bar portion and the handle sticked double faced adhesive tape in bar portion, on the internal face of this double faced adhesive tape and bar portion, coat to install and use solvent, promptly bar portion inserted in the hollow bulb of handle.After 10 hours, cut handle, can see that handle internal face and adhesive tape are all drying regime.

About tubularinner part 21 and tubularoutside parts 22 wall thickness separately, make the wall thickness of part of coating tubularinner part 21 of wall ratio tubularoutside parts 22 of tubularinner part 21 big at least.The impulsive force that striker's square stance produces can make handle produce torsional deflection, yet it receives the influence of the distortion of soft tubularoutside parts 22 to a greater degree.Yet, owing to coat hard and the thicker tubularinner part 21 of wall thickness by the tubularoutside parts 22 thin than softness and wall thickness, thereby can improve the whole torsional rigid of handle.In addition, the verticallyprominent muscle 24 that is formed on the tubularinner part 21 also can make the torsional rigid of handle be improved.Improved torsional rigid, then the accuracy of direction of stroke can be guaranteed.

Above-mentioned handle base endpart 23 is different with main part (part except the handle base end part 23) color of tubularinner part 21, forms with the sulfuration of color material different, and then its meeting of having a common boundary produces the change as ripple, thereby is difficult to differentiate.

The generation type of the different colours of above-mentioned the 1st outsideparts 22A and the 2ndoutside parts 22B does; Earlier form tubularinner part 21 through injection molded; Be specially, thereby injected plastics material forms hollow bulb on tubularinner part 21 around mandrel 211, and; Mandrel 211 is not extracted after the shaping, but the tubularinner part 21 that will have a mandrel 211 is inserted in the space that is surrounded by patrix 212 and counterdie 213.And, shown in figure 15, be boundary withannular projection 210, the different sheet rubber 214 and 215 of color on handle base end side and handle head end side volume.Make patrix 212 and counterdie 213 matched moulds, sheet rubber 214 and 215 is carried out compression molding processing, make sheet rubber 214 form the 1st outsideparts 22A, sheet rubber 215 forms the 2ndoutside parts 22B.

With reference to the accompanying drawings the present invention's the 4th embodiment is carried out detailed explanation.

Tubularinner part 31 and tubularoutside parts 32 have been shown among Figure 16, and the two is all rubber part.About manufacturing process, for example, after initial shaping tubularinner part 31, this tubularinner part 31 is configured in the mould as insertion parts, form thereby make tubularoutside parts 32 coat these tubularinner part 31 afterwards.Independent tubularinner part 31 has been shown among Figure 16 and oninner part 31, has formed tubularoutside parts 32 these two kinds of structures, this is for the convenience on explaining.In actual conditions, in a single day tubularoutside parts 32 are formed and will coat tubularinner part 31.

Rubber as moulding material; Its main component is natural rubber (NR); For example; Can get NR80～100 weight portions, EPDM 0～20 weight portion, antiaging agent 1 weight portion, stearic acid 1 weight portion, carbon black 10～30 weight portions, softening agent 5～10 weight portions, processing aid 2 weight portions, zinc oxide 5 weight portions, vulcanization accelerator 1～2 weight portion, vulcanization accelerator auxiliary agent 0.5 weight portion, sulphur 1～2 weight portion and obtain rubber composition after being combined together, form handle thereby afterwards this rubber composition is carried out vulcanization forming.In tubular inner part 31 and tubular outside parts 32, thereby can make tubular inner part 31 form firmlyer through the composition that changes rubber composition.Thereby it is the SBR more than 50% that tubular inner part 31 can be used styrene-content.Tubular outside parts 32 preferably; Rubber composition by containing diene rubber 45～90 weight portions, ethylene-propylene bipolymer and ethylene-propylene-diene terpolymers 5～30 weight portions, chlorinated scoline 5～25 weight portions forms, and it is at least a that diene rubber is preferably selected from natural rubber, isoprene rubber, SBR styrene butadiene rubbers, nitrile butadiene rubber and chloroprene rubber.Use such rubber composition, can have the higher coefficient of kinetic friction, can be anti-skidding and have good wearability and ageing resistance, thereby have long service life.In addition, in addition, lower temperature resistance is also better, and temperature is also less to each Effect on Performance, the difficult generation phenomenon that is clamminess, thus grasping has good grasping sense tightly.In addition,, can use silica or talcum etc. to replace carbon black as reinforcing agent about the formation of handle base end part 33, thereby and add pigment colouring.In addition, in order to improve hardness, also can add styrene-content is SBR (High styrene butadiene-styrene rubber) 5～20 weight portions more than 50%.

Shown in figure 17; On above-mentioned tubularinner part 31, on outer peripheral face, be formed with a plurality of verticallyprominent muscle 34 near handle base endpart 33 1 sides, this length of vertically dashing forwardmuscle 34 is 8～11mm; Thickness (rising height) is 0.2～0.6mm, and width is 0.6～1.5mm.And adjacent two verticallyprominent muscle 34 are at the 3mm that is spaced apart of handle base endpart 33 1 sides.Above-mentioned handle base endpart 33 is by forming thaninner part 31 hard rubber compositions, thus be connected withinner part 31 constitute as a whole.In addition, be formed withprominent muscle 35 in the head end side of tubular inner part 31 (occupying 1/4th to 1/5th length of the total length of tubular inner part 31).

The hardness of the JIS K 6253 formula A of above-mentioned handle base end part 33 (below be all the JIS standard) is 65～75, and the hardness of tubularinner part 31 is 65～75, and the hardness of tubularoutside parts 32 is 40～50.Such hardness number does not have particular determination, can make tubularoutside parts 32 than tubularinner part 31 softnesses.

Be formed with a plurality ofcircumferential slots 36 on the outer peripheral face in the zone of the part that is formed with verticallyprominent muscle 34 tubularoutside parts 32, that coat above-mentioned tubular inner part 31.Thesecircumferential slots 36 are thinner, and its groove width is about 0.1～0.3mm, the spacing parallel arranging setting about 1.5mm of being separated by in the axial direction.Be formed with a plurality ofoblique grooves 37 with thesecircumferential slots 36 with intersecting.These

grooves

36 and 37 are used for anti-skidding, and in addition,circumferential slot 36 also is used on the handle part, being easy to produce the action of centrifugal force power that is used to offset club head at square stance.In addition, on the outer peripheral face than the head end side of tubularinner part 31 of tubularoutside parts 32, be formed with a plurality ofcannelures 38, and be formed withoblique groove 39 with intersecting with thesecannelures 38.

The total length of above-mentioned tubularinner part 31 will be grown 1～4cm than half of handle total length (comprising handle base endpart 33).In addition, the part of half the length 4cm that surpasses the handle total length of tubularinner part 31 can increase the whole weight of handle.In addition, even tubularinner part 31 forms necessary above length, the function of handle can not be improved again.

Shown in figure 18, on handle base endpart 33, be formed with fitting portion 33A and flange part 33B, fitting portion 33A is chimeric and be fixed on the rear end of tubular inner part 31.The external diameter of flange part 33B is identical with the base end side external diameter of tubular outside parts 32.In hollow bulb that the inwall 31A by tubularinner part 31 surrounds and the hollow bulb that surrounds by the inwall 32C of the 2nd tubular outside parts 32B, be inserted with unshowned bar portion, handle is installed in the bar portion.Fixedly being achieved in that promptly between bar portion and the handle sticked double faced adhesive tape in bar portion, on the internal face of this double faced adhesive tape and bar portion, coat to install and use solvent, promptly bar portion inserted in the hollow bulb of handle.After 10 hours, cut handle, can see that handle internal face and adhesive tape are all drying regime.

About tubularinner part 31 and tubularoutside parts 32 wall thickness separately, make the wall thickness of part of coating tubularinner part 31 of wall ratio tubularoutside parts 32 of tubularinner part 31 big at least.The impulsive force that striker's square stance produces can make handle produce torsional deflection, yet it receives the influence of the distortion of soft tubularoutside parts 32 to a greater degree.Yet, owing to coat hard and the thicker tubularinner part 31 of wall thickness by the tubularoutside parts 32 thin than softness and wall thickness, thereby can improve the torsional rigid of whole handle.In addition, the verticallyprominent muscle 34 that is formed on the tubularinner part 31 also can make the torsional rigid of handle be improved.Improved torsional rigid, then the accuracy of direction of stroke can be guaranteed.