US20070004532A1 - Head assembly of golf club - Google Patents

Abstract

The head assembly of a golf club includes a sound generator or a vibration generator. The sound generator includes a sound hole formed in a head of a driver, a sound pipe attached to the head, and a sound generator attached to an iron. Using the head assembly, since the golfer slowly swings the golf club, improper rapid swing is prevented and head-up is also minimized.

Description

BACKGROUND OF THE INVENTION
• 1. Field of the Invention
• The present invention relates to a head assembly of golf clubs, and more particularly, to an improvement of a head of various golf clubs such as drivers, irons, and putters, and fairway woods to enable a golfer to improve their swing and to efficiently use the golf clubs.
• 2. Description of the Related Art
• Golf is often referred to as a “mind game”, and a golfer's state of mind is of primary importance in the game of golf. Since the golfer's personality influences their golf game, it is difficult to gain skill in golf. In particular, when novices swing a golf club they may become accustomed to an undesirable golf pose. As such most novices have difficulty in improving their swing.
• Generally, there are various important factors in playing golf, which golfers have difficulty in easily learning, as follows. First, a golf club must be slowly backswung so as to precisely drive a golf ball along a predetermined lie without disturbing swing when backswinging with the golf club. Second, cocking, i.e. striking the golf ball or swinging with a golf club only using the golfer's wrists must be minimized. The golfer's left shoulder must be slowly turned for slow swing while preventing the golfer's body from recoiling when starting the backswing (a motion of moving a golf club for a shot). Third, the downswing must be performed after pausing the head of the golf club at the peak of the backswing stroke. The lower part of the golfer's body must be prevented from vibrating when performing the backswing.
• Although novices consciously try to learn proper swing technique according to the various factors, since most novices is psychologically hasty and cannot visually concentrate the golfer's eyes upon a golf ball, goals, which the novices want to achieve, are not achieved. Moreover, since the novices cannot strike the golf ball as their wishes when the novices concentrate their efforts to improve their swings, the novice cannot swing according to the various factors.
SUMMARY OF THE INVENTION
• Therefore, the present invention has been made in view of the above problems, and it is an object of the present invention to provide a head assembly of golf clubs, such as putters, irons, drivers (including fairway woods), enabling a golfer to improve golf swing mentally influence, to aim a head of the golf club when swinging the golf club, to improve their grip of the golf club, to improve their swing, and to improve their drive.
• In accordance with the present invention, the above and other objects can be accomplished by the provision of a head assembly of a golf club including a sound generating device including one or a combination of at least two of the group of at least a single sound pipe for communicating a cavity formed in a body of a head of a driver with exterior, a sound slit formed in the sound pipe, and a sound hole formed in the head.
• Preferably, the cavity of the body of the head of the driver is divided by at least one partition.
• In accordance with the present invention, the above and other objects can be accomplished by the provision of a head assembly of a golf club including a sound generating device including at least one metal resonant wall for dividing a cavity formed in a body of a head of a driver, and regularly or irregularly arranged to divide a part or whole of the cavity.
• In accordance with the present invention, the above and other objects can be accomplished by the provision of a head assembly of a golf club including a sound generating device, the sound generating device including a connection shaft installed to a center of gravity toward the wall of the cavity in a cavity of a body of a head of a driver, and a vibration pipe or a vibration ball installed to an end of the connection shaft.
• In accordance with the present invention, the above and other objects can be accomplished by the provision of a head assembly of a golf club including a sound generating device, the sound generating device including a hollow sound device installed to a rear side of a face of a head of an iron and having various shapes such as a golf ball shape, at least one sound hole formed in the hollow sound device and having various shapes, and a sound slit.
• In accordance with the present invention, the above and other objects can be accomplished by the provision of a head assembly of a golf club including a sound generating device including an sighting plate extending from the upper surface of a head of a putter to the rear side thereof, and a sound generating device detachable to the lower side of the sighting plate and including a sound unit for accommodating a sound disc or a sound ball guided by a slope and colliding against the wall of the head to generate sound and vibration when the head is positioned at the peak of the backswing stroke.
• In accordance with the present invention, the above and other objects can be accomplished by the provision of a head assembly of a golf club including a sound generating device including a plurality of metal sound fins extending from the rear side of a head of a putter and installed at regular intervals to generate sound due to vibration.
• In accordance with the present invention, the above and other objects can be accomplished by the provision of a head assembly of a golf club including a sound generating device, the sound and vibration generating device including a hollow sensing pipe fixed to a bottom surface of a head in a cavity of a body of the head of a driver, closed by a cap, and having a closed end, and at least one sensing ball inserted into the hollow sensing pipe and colliding against the closed end to generate sound or vibration when the head is positioned at peak of the swing stroke.
• Since the head assembly of a golf club in accordance with the present invention includes a sound generating device or a vibration generating device installed to a head, the golfer can utilize their senses to improve their golf game. Thus, the golfer can accustom himself/herself to smoothly and slowly swinging the golf club. Moreover, the golfer can prevent improper swing, i.e. the backswing during the putter swing.
BRIEF DESCRIPTION OF THE DRAWINGS
• These and/or other objects and advantages of the present invention will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:
• FIG. 1ais a perspective view illustrating a head assembly of a golf club according to a first preferred embodiment of the present invention applied to a driver;
• FIG. 1bis a sectional view taken along the line A-A inFIG. 1a;
• FIG. 1cis a sectional view illustrating a first modification of the head assembly according to the first preferred embodiment of the present invention taken along the line A-A inFIG. 1a;
• FIG. 1dis a sectional view illustrating a second modification of the head assembly according to the first preferred embodiment of the present invention taken along the line A-A inFIG. 1a;
• FIG. 1eis a sectional perspective view illustrating a third modification of the head assembly according to the first preferred embodiment of the present invention;
• FIG. 1fis a sectional perspective view illustrating a fourth modification of the head assembly according to the first preferred embodiment of the present invention;
• FIG. 1gis a sectional perspective view illustrating a fifth modification of the head assembly according to the first preferred embodiment of the present invention;
• FIG. 1his a sectional perspective view illustrating a sixth modification of the head assembly according to the first preferred embodiment of the present invention;
• FIG. 1iis a sectional perspective view illustrating a seventh modification of the head assembly according to the first preferred embodiment of the present invention;
• FIG. 2ais a partially sectional perspective view illustrating a head assembly of a golf club according to a second preferred embodiment of the present invention applied to a driver;
• FIG. 2bis a partially sectional perspective view illustrating a first modification of the head assembly of a golf club according to the second preferred embodiment of the present invention;
• FIG. 2cis a partially sectional perspective view illustrating a second modification of the head assembly of a golf club according to the second preferred embodiment of the present invention;
• FIG. 2dis a partially sectional perspective view illustrating a third modification of the head assembly of a golf club according to the second preferred embodiment of the present invention;
• FIG. 2eis a partially sectional perspective view illustrating a fourth modification of the head assembly of a golf club according to the second preferred embodiment of the present invention;
• FIG. 2fis a partially sectional perspective view illustrating a fifth modification of the head assembly of a golf club according to the second preferred embodiment of the present invention;
• FIG. 3ais a perspective view illustrating the lower side of a head assembly of a golf club according to a third preferred embodiment of the present invention applied to a driver;
• FIG. 3bis a sectional view taken along the line B-B inFIG. 3a;
• FIG. 3cis a sectional view illustrating a first modification of the head assembly according to the third preferred embodiment of the present invention taken along line B-B inFIG. 3a;
• FIG. 4ais a perspective view illustrating a head assembly of a golf club according to a fourth preferred embodiment of the present invention applied to a putter;
• FIG. 4bis a perspective view illustrating a first modification of the head assembly according to the fourth preferred embodiment of the present invention applied to an iron;
• FIG. 4cis a perspective view illustrating a second modification of the head assembly according to the fourth preferred embodiment of the present invention applied to an iron;
• FIG. 5ais a rear-side perspective view illustrating a head assembly of a golf club according to a fifth preferred embodiment of the present invention applied to a putter;
• FIG. 5bis an exploded perspective view illustrating the head assembly of a golf club according to the fifth preferred embodiment of the present invention inFIG. 5a;
• FIG. 5cis a sectional view taken along line C-C inFIG. 5c;
• FIG. 5dis a sectional view illustrating a first modification of the head assembly according to the fifth preferred embodiment of the present invention;
• FIG. 6ais a perspective view illustrating a head assembly of a golf club according to a sixth preferred embodiment of the present invention applied to a putter;
• FIG. 6bis a sectional view taken along line D-D inFIG. 6a;
• FIG. 7ais a perspective view illustrating a head of a head assembly of a golf club according to a seventh preferred embodiment of the present invention, applied to a driver, with a cover removed;
• FIG. 7bis a lower-side exploded perspective view illustrating the head assembly of a golf club according to the seventh preferred embodiment of the present invention inFIG. 7a;
• FIG. 7cis a view illustrating a modification of the head assembly of a golf club according to the seventh preferred embodiment of the present invention;
• FIG. 7dis a sectional view illustrating a head before striking a golf ball with the head assembly of a golf club according to the seventh preferred embodiment of the present invention; and
• FIG. 7eis a sectional view illustrating a head after striking a golf ball with the head assembly of a golf club according to the seventh preferred embodiment of the present invention.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
• The structure and aspects of a head assembly of a golf club according to the present invention are applicable to all golf clubs. Hereinafter, the structure and operation of the head assembly of a golf club according to the preferred embodiments of the present invention and its modifications, applied to drivers (including irons) and putters, will be described in detail in conjunction with the accompanying drawings. Although the head assembly of the preferred embodiments of the present invention and the modifications are applied to different kinds of golf clubs, the same reference numerals are assigned to identical elements of a head.
Embodiment 1
• FIG. 1ashows a head assembly of a golf club according to a first preferred embodiment of the present invention applied to a head H of a driver D1. The head assembly, according to the first preferred embodiment of the present invention, is applied to the driver D1 having a cavity CV formed in the driver D1. The head assembly according to this embodiment includesplural sound pipes1,2, and3, which are extended from the back of a face F of the head H to the cavity CV of a body BD of the driver D1 and are fixed to the body BD.
• Moreover, as shown inFIG. 1billustrating a first modification of the head assembly of a golf club according to the first preferred embodiment of the present invention, thesound pipes1,2, and3 are integrally fixed to a wall H′ for forming the driver D1. The first modification of the head assembly further includes a partition P installed to the intermediate portion of the cavity CV and to divide the cavity CV into two spaces so as to separate the space where thesound pipes1,2, and3 are installed from the remainder of the cavity CV, thereby effectively generating sound.
• FIG. 1cshows various modifications of the sound pipes, employed in the first modification of the head assembly according to the first preferred embodiment of the present invention, in a single driver for the illustrative purpose.
• As shown in the drawing, asound pipe11 integrally formed with a wall H′ for forming the head H of a driver D2 and havingthreads11′ formed in the inner wall thereof, asound pipe12 fixed to the wall H′ of the head H of the driver D2 by a screw or by welding after press-fitting, asound pipe13 having aclosed end13′ and an inner wall without threads and fixed to the wall H′ for forming the head H of the driver D2, and asound pipe14 having a sound generating slit14′ for easily generating sound are installed to a single driver for illustrative purposes. However, when thesound pipes11,12,13, and14 are practically installed to the head H, one or more of thesound pipes11,12,13, and14 may be installed to the driver D2. The thread and the sound generating slit cause an air vortex which easily generates sound.
• FIG. 1dshows a second modification of the head assembly according to the first preferred embodiment of the present invention. As shown in the drawing, the second modification of the head assembly according to the first preferred embodiment of the present invention includes a plurality ofsound pipes21,22, and13 alternately installed to the wall H′ of the body BD for forming a head H of a driver D3.
• As shown inFIG. 1e,a third modification of the head assembly according to the first preferred embodiment of the present invention includes a plurality of longitudinal sound slits21,32,33, and34 formed in a wall H′ of a body BD of a driver D4 in the longitudinal direction. A fourth modification of the head assembly according to the first preferred embodiment of the present invention, as shown inFIG. 1f,includes a plurality ofsound holes41,42,43, and44 formed in a wall H′ of a body BD of a driver D5. A fifth modification of the head assembly according to the first preferred embodiment of the present invention, as shown inFIG. 1g,includes a plurality of star-shaped sound holes51,52,53, and54 formed in a body BD of a driver D6.
• If necessary, the head assembly of a golf club according to the first preferred embodiment of the present invention may include rubber or synthetic resin cap (not shown) for closing the sound slits and the sound holes so that a head employing the head assembly of a golf club according to the first preferred embodiment of the present invention may be used as a general head of a golf club.
• In addition, a sixth modification of the head assembly according to the first preferred embodiment of the present invention, as shown inFIG. 1h,includes a single long sound slit55 formed in a body BD of a driver D7 having a partition P. A seventh modification of the head assembly according to the first preferred embodiment of the present invention, as shown inFIG. 1i,includes a long sound slit56 formed in a streamlined concave side face F.
• As described above, the head assembly of a golf club according to the first preferred embodiment of the present invention can be applied to drivers having various configurations and structures, and its concept is to generate sound using friction between air and the sound slits or the sound holes generated when the head of the golf club is swung over a predetermined speed.
• In other words, according to the head assembly of a golf club according to the first preferred embodiment of the present invention, air generates sound due to rapid angular speed of the head assembly during the backswing when passing through the sound slits or the sound holes. Therefore, a golfer repeats motion of slowly swinging the golf club to prevent sound from being generated during the backswing so that the golfer accustoms himself/herself to a slow backswing.
Embodiment 2
• FIGS. 2ais a perspective view illustrating a head assembly of a golf club according to a second preferred embodiment of the present invention applied to a driver. The second preferred embodiment is described together with various modifications.
• A head H of a driver D9 includes a cavity CV formed in the head H, and a resonant wall W installed in the cavity CV of a body BD connected to a face F of the head to generate sound. The resonant wall W is a metal wall with a sufficient thin thickness for dividing the cavity CV into two hollow spaces G1 and G2. The resonant wall W is made of the same material as that of the head H of the driver D9 and is integrally formed with the head H or is separately made of a resonant metal plate and fixed in the cavity CV.
• As shownFIG. 2b,a driver D10 of a first modification of the head assembly of a golf club according to the second preferred embodiment of the present invention includes a plurality of resonant walls W1 and W2. As shown inFIG. 2c,a driver D11 of a second modification of the head assembly of a golf club according to the second preferred embodiment of the present invention includes a single partial resonant wall WP1 or at least two partial resonant walls WP1 and WP2, installed to a wall of the cavity CV.
• As shown inFIG. 2d,a driver D12 of a third modification of the head assembly of a golf club according to the second preferred embodiment of the present invention includes partial resonant walls WP3, WP4, and WP5, alternately arranged in the cavity CV.
• In the fourth and fifth modifications of the head assembly of a golf club according to the second preferred embodiment of the present invention shown inFIGS. 2eand2f,a driver D13 includes partial resonant walls WP6 and WP7 installed to the rear wall of the cavity CV, i.e. the inner wall opposite to the face F, a driver D14 includes partial resonant walls WP8 and WP9 crossing each other within the cavity CV.
• The resonant walls W, W1, and W2 . . . , and the partial resonant walls WP, WP1, and WP2 . . . are made of metal plates. Preferably, when the head H of the driver is vibrated by external impact, the resonant walls W, W1, and W2 . . . and the partial resonant walls WP, WP1, and WP2 . . . are made of materials and have thicknesses to generate sounds due to the vibration of the head H of the driver.
Embodiment 3
• Generally, drivers D are manufactured via mechanical processes such as molding, forging, or the like. As shown inFIG. 3s,a head H of a driver D15, employing a head assembly of a golf club according to a third preferred embodiment of the present invention, includes a face F and a body BD connected to the face F to form a cavity CV therein. The body BD is integrally formed with the face F or is fixed to the face F.
• The head assembly of a golf club according to the third preferred embodiment of the present invention further includes a vibration generating device R installed in the cavity CV. The vibration generating device R, as shown inFIG. 3b,includes anelastic connection rod60 such as a coil spring installed to a center of gravity G of the rear face of the face F in the cavity CV formed in the body BD, and a metal ball, such as a steel ball, fixed to a free end of theelastic connection rod60.
• The vibration generating device R of a modification of the head assembly of a golf club according to the third preferred embodiment of the present invention applied to a driver D16, as shown inFIG. 3c,includes aconnection shaft62 such as a steel plate, an elastic metal plate, or a fixing pipe instead of theelastic connection rod60, and avibration pipe63 fixed to a free end of theconnection shaft62, and its operation is identical to that of the vibration generating device R shown inFIG. 3b.
• In these structures, optimal weight of themetal ball61 and thevibration pipe63 can be obtained by repeating experiments like the operation and effect of the present invention described later. Moreover, since the optimal weight varies according to the kind of golf club and the manufacturer, detailed data will not be provided in the description.
• More preferably, as shown inFIGS. 3band3c,the face F has an outer portion with a thickness T greater than the thickness t of a central portion of the face F so that elasticity of the face F is increased to easily generate vibration.
• According to the second and third preferred embodiments of the present invention, when striking a golf ball (not shown) with the driver, specific sound or vibration is generated by the resonant walls W, W1, and W2 . . . , the partial resonant walls WP, WP1, and WP2 . . . of the second preferred embodiment of the present invention, or theball61 and thevibration pipe63 of the third preferred embodiment of the present invention in accordance with swing conditions.
• In other words, when proper swing is performed, normal sound is generated or vibration transmitted to the golfer's hands is generated. On the other hand, when the club is improperly swung, sound or vibration corresponding to the improper swing is generated. Thus, when the golfer trains using the golf clubs employing the head assembly according to the preferred embodiments, the golfer understands the sound generated when the optimal swing performed. Thus the golfer trains the golf swing to prevent the sound generated when improper swing is performed from being generated, thereby improving the golfer's improper swing.
Embodiment 4
• As shown inFIG. 4s,a head assembly of a golf club according to a fourth preferred embodiment of the present invention applied to an iron I1 includes a variously shapedhollow sound device70 installed to a rear surface of a face F.
• The sound device of a first modification of the head assembly of a golf club according the fourth preferred embodiment of the present invention applied to the iron I1, as shown inFIG. 4b,is made of various materials and has a golf ball shape or a hollow semispherical shape. Asound device80 of a second modification of the head assembly of a golf club according to the fourth preferred embodiment of the present invention, as shown inFIG. 4c,has quarter spherical shape and may be made of various materials.
• Thesesound devices70, as shown inFIG. 4a,have star-shaped sound holes71,72, and73, or sound slits74,75, and75 as shown inFIG. 4billustrating the first modification of the head assembly, and thesound device80, as shown inFIG. 4cillustrating the second modification of the head assembly, hascircular sound hole81,82, and83, so that a sound generating device can be structured.
• Operation and effects of the head assembly of a golf club according to the fourth preferred embodiment of the present invention are identical to those of the head assembly of a golf club according to the first preferred embodiment of the present invention.
Embodiment 5
• FIG. 5ashows a head assembly of a golf club according to a fifth preferred embodiment of the present invention applied to a putter P1. As shown in the drawing, preferably, a sound device of the putter P1 includes an sighting plate GP extending from an upper plate U of a head H backward and integrally formed with the upper plate U to help the golfer aim when putting a golf ball, and a cavity CP depressed from the rear central portion of a face F of the head H. The cavity CP, as shown inFIG. 5cdepicting a sectional view taken along the line C-C, is defined by the upper plate U, the face F, and a lower plate W of the head H.
• A sound generating device of the head assembly of a golf club according to the fifth preferred embodiment of the present invention includes a sound unit K installed between the cavity CP and the sighting plate GP or integrally formed with the sighting plate GP. The sound unit K includes an approximate box-shapedunit box100, made of metal or synthetic resin and fixed to the head H.
• Theunit box100 of the sound unit K, as shown inFIG. 5b,accommodates an integratedmetal sound disc110 with a predetermined diameter therein. Thesound disc110 includes anelastic ring110 inserted into the outer circumference of thesound disc110 to absorb shock and aguide groove112 formed in the outer circumference of thesound disc110 below the position of theelastic ring111.
• Thesound disc110 is accommodated in aguide channel121 upwardly slanted toward the face F of the head H andguide rails120 formed in theguide channel121 are inserted into aguide groove112 of thesound disc110, such that thesound disc110 freely slides along theguide channel121.
• Theunit box100, as shown inFIG. 5c,includes theguide rails120 downwardly slanted toward the rear side of the sighting plate P, and a slope a of the guide rails120 is determined by experimentation.
• Operation and effects of the head assembly of a golf club according to the fifth preferred embodiment of the present invention will be described as follows.
• When the golfer take an initial pose for putting with the putter P1 inFIG. 5c,the putter P1 is level with the ground, and thesound disc110 is positioned at the rear side of theunit box100 due to the slope a of the guide rails120.
• Under these conditions, if the golfer rapidly backswings the putter P1, a horizontal directional component force, greater than friction between thesound disc110 and theguide rails120, is generated due to the slope a, and thesound dis110 moves from the rear side of theunit box100 to the face F of the head H of the putter P1.
• At that time, thesound disc110 collides against the wall of theunit box100 to generate sound and vibration. Thus, the golfer understands that the golfer rapidly backswings, i.e. abnormally backswings.
• Moreover, during the downswing, the golfer putts to prevent the horizontal directional component force, greater than the friction due to the slope a of theunit box100, from being generated so that the golf can accustom himself/herself to a slowly downswing of the putter P1. Cocking (putting with the wrists) can also be prevented according to the same principle as illustrated above.
• A putter P2, as shown inFIG. 5d,includes aunit box140 having asound ball130 instead of thesound disc110 and aguide pipe141 instead of theguide channel121, and its operation and effect are identical to those of the putter P1.
Embodiment 6
• In a sixth preferred embodiment of the present invention, a sound generating device is installed to a head H of a putter P3.
• The putter P3 includes a sighting plate GP integrally extending from an upper plate U of the head H to help the golfer aim, and a cavity CP depressed from the rear central portion of a face F of the head H. As shown inFIG. 6bshowing a sectional view taken along the line D-D, the cavity CP is preferably defined by the upper plate U, the face F, and a lower plate W. A sound generating device of the head assembly of a golf club according to the sixth preferred embodiment of the present invention includes a plurality ofsound fins150,151, and152, fixed at regular intervals to a rear surface Hg of the head H, made of metal plates with a predetermined thickness sufficient to easily generate sound, and generating sound when swung.
Embodiment 7
• A head assembly of a golf club according to a seventh preferred embodiment of the present invention applied to a driver D17 will be described in detail with reference toFIGS. 7ato7e.
• As shown in the drawings, the head assembly of a golf club according to the seventh preferred embodiment of the present invention is depicted in the drawings by removing a crown, i.e. the upper side of the head H. Ahollow sensing pipe160 is fixed to a bottom surface OB of a cavity CV to have a slope b near a neck N, to which a shaft (not shown) is installed, and is made of various materials. Thehollow sensing pipe160 has an opened end connected to aninstallation hole162 of the bottom surface OB and a closed rear end. Moreover, as shown inFIG. 7b,theinstallation hole162 hasthreads162′ formed in the inner circumference thereof and acap163 couple with theinstallation hole162 is formed withthreads163′. Asensing ball161, having a slightly smaller diameter than the inner diameter of thehollow sensing pipe160, is inserted into theinstallation hole162 from alower surface164 of the head H, and thecap163 closes theinstallation hole162.
• A single ormore sensing ball161 is made of metal and inserted into theinstallation hole162.
• Thesensing ball161 is inserted into thesensing pipe160 to freely move within thehollow sensing pipe160. If necessary, withdrawing the sensing ball from thesensing pipe160 after opening thecap163, the head assembly of a golf club according to the seventh preferred embodiment of the present invention may be used as a general head of a golf club without thesensing ball161. The slope b can be variously determined by experiments and according to the kind and specifications of the driver D17 employing the head assembly of a golf club according to the seventh preferred embodiment of the present invention.
• As shown inFIG. 7dillustrating the driver D17 employing the head assembly of a golf club according to the seventh preferred embodiment of the present invention, since, in the head H of the driver D17 directly before a normal swing is performed, thesensing pipe160 is inclined to the neck B, i.e. the toe by the slope b, thesensing ball161 is stably accommodated near the neck N in thesensing pipe160.
• In this state, the golfer backswings, thesensing ball161 keeps its original position in thesensing pipe160 due to the stationary inertia of thesensing ball161 generated by backswing and the geometrical structure of thesensing pipe160 before the head H reaches the peak of the backswing stroke. However, when the head H reaches the peak of the backswing stroke, the angular speed of the head H is0 (zero) and the head H and thesensing pipe160 are turned over. At that time, thesensing ball161 loses the stationary inertia and rolls down along thesensing pipe160 due to gravity.
• Thesensing ball161 collides against the closed end of thesensing pipe160 to generate sound and vibration. The golfer feels the vibration transmitted to the golfer's hands gripping the golf club and hears the sound so that the golfer understands that the head H reaches the peak of the backswing stroke. Thus, after this, the golfer understands that the backswing must be paused at the peak for a while and downswing must be slowly performed.
• As shown inFIG. 7c,the installation angle and direction of thesensing pipe161 where the position of thesensing ball161 is turned over in thesensing pipe160 of the driver D17 at the peak of the backswing stroke are suggested. In other words, as shown inFIG. 7c,thesensing pipe160 may be installed to the driver D17 in the direction of A-A′ or B-B′.
• Thus, when training using the head employing the head assembly of a golf club according to this preferred embodiment of the present invention, the golfer can perfect their backswing, whereby the golfer correctly hits the golf ball with the golf club to lengthen the distance.
• When using the head employing the head assembly of the present invention, the golfer hears sound generated due to the various sound generating devices and air flowed by rapid change of angular speed of the head during the backswing and senses vibration generated by the vibration generating devices. Thus, since the golfer slowly swings the golf club to prevent the sound from being generated, rapid backswing that is apt to be the worst swing is corrected. Thus, the rapid swing is prevented and head-up that must be restricted is also minimized.
• Although the preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.

Claims (8)

1. A head assembly of a golf club comprising a sound generating device including one or a combination of at least two of the group of at least a single sound pipe for communicating a cavity formed in a body of a head of a driver with exterior, a sound slit formed in the sound pipe, and a sound hole formed in the head.

2. The head assembly of a golf club as set forth inclaim 1, wherein the cavity of the body of the head of the driver is divided by at least one partition.

3. A head assembly of a golf club comprising a sound generating device including at least one metal resonant wall for dividing a cavity formed in a body of a head of a driver, and regularly or irregularly arranged to divide a part or whole of the cavity.

4. A head assembly of a golf club comprising a sound generating device, the sound generating device comprising:

a connection shaft installed to a center of gravity toward the wall of the cavity in a cavity of a body of a head of a driver; and

a vibration pipe or a vibration ball installed to an end of the connection shaft.

5. A head assembly of a golf club comprising a sound generating device, the sound generating device comprising:

a hollow sound device installed to a rear side of a face of a head of an iron and having various shapes such as a golf ball shape;

at least one sound hole formed in the hollow sound device and having various shapes; and

a sound slit.

6. A head assembly of a golf club comprising a sound generating device comprising:

an sighting plate extending from the upper surface of a head of a putter to the rear side thereof; and

a sound generating device detachable to the lower side of the sighting plate and including a sound unit for accommodating a sound disc or a sound ball guided by a slope and colliding against the wall of the head to generate sound and vibration when the head is positioned at the peak of the backswing stroke.

7. A head assembly of a golf club comprising a sound generating device including a plurality of metal sound fins extending from the rear side of a head of a putter and installed at regular intervals to generate sound due to vibration.

8. A head assembly of a golf club comprising a sound generating device, the sound and vibration generating device comprising:

a hollow sensing pipe fixed to a bottom surface of a head in a cavity of a body of the head of a driver, closed by a cap, and having a closed end; and

at least one sensing ball inserted into the hollow sensing pipe and colliding against the closed end to generate sound or vibration when the head is positioned at peak of the swing stroke.

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