CN110370841B - Mechanical pencil with core protection function - Google Patents

Abstract

The invention relates to an automatic pencil with a lead protecting function, which comprises a penholder component and a pencil lead component arranged in the penholder component, wherein a holding sleeve for holding by a hand during writing is arranged outside the penholder component, the holding sleeve can axially move in a certain range relative to the penholder component, the front end of the penholder component is provided with a pencil lead sheath, and the pencil lead sheath and the holding sleeve have a linkage structure. The invention utilizes the writing pressure acting on the holding sleeve during writing to make the holding sleeve move downwards, and the pen core protecting sleeve can be driven to move downwards through the linkage structure, so that the exposed length of the pen core is shortened, and the aim of protecting the pen core from being broken easily is fulfilled.

Description

Mechanical pencil with core protecting function

Technical Field

The invention relates to a mechanical pencil with a core protecting function.

Background

When writing with a mechanical pencil, people are often used to hold the pencil shaft obliquely. Therefore, the pen core at the front end of the pen holder assembly is easily broken under the condition of more exposed pen cores.

In order to solve the above problems, chinese patent CN104742576A is an improvement on the basis of the conventional mechanical pencil, the front end of the pencil lead sheath is arranged in a spindle shape, and the opening at the front end of the pencil holder assembly is in contact with the surface of the spindle-shaped pencil lead sheath to make the pencil lead sheath extend out to the front end during writing, thereby shortening the exposed length of the pencil lead and achieving the purpose of protecting the pencil lead during writing.

However, the mechanical pencil with the above structure also needs a complex mechanism to make the whole pencil lead assembly deflect, shift the pencil holder, make writing unstable, and make the stroke length difficult to control, so the structure is complex and the manufacturing cost is high.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provide the mechanical pencil with the core protecting function, which has a simple structure.

The pen comprises a pen holder component and a pen core component arranged in the pen holder component, and the technical scheme is that a holding sleeve for holding by a hand during writing is arranged outside the pen holder component, the holding sleeve can axially move in a certain range relative to the pen holder component, a pen core sheath is arranged at the front end of the pen holder component, and the pen core sheath and the holding sleeve have a linkage structure.

The structure utilizes the writing pressure acting on the holding sleeve during writing to enable the holding sleeve to move downwards, and the linkage structure can drive the pencil lead sheath to move downwards, so that the exposed length of the pencil lead is shortened, and the aim of protecting the pencil lead from being broken easily is fulfilled.

The invention further adopts the technical scheme that a linkage piece is arranged in the pen holder assembly, the lower end of the linkage piece is abutted against the pen core sheath, and the linkage piece is linked with the holding sleeve.

The further technical proposal of the invention is that a lug extending into the penholder assembly is arranged on the holding sleeve and is propped against the linkage piece, so that the linkage piece is pushed by the lug to move downwards when writing pressure is applied to the holding sleeve; in addition, a reset mechanism is arranged, and the reset mechanism can enable the linkage piece to move upwards when the writing pressure on the holding sleeve is relieved.

The further technical scheme of the invention is that the number of the linkage parts is two, the lugs are arranged in pairs, and the linkage parts and the lugs are symmetrically distributed relative to the axis.

Therefore, the acting force of the convex block on the pen core sheath can be balanced, and the transmission of motion is more facilitated.

The further technical proposal of the invention is that the resetting mechanism acts on the pen core sheath to lead the pen core sheath to move upwards.

The further technical solution of the present invention is that the pen-holder assembly is provided with an axial slot at a position corresponding to the protrusion, the slot can accommodate the protrusion to enter or pass through the slot, and meanwhile, the slot has a certain axial space, which can allow the protrusion to axially move in the slot within a certain range.

The axial fluting on the one hand leads the removal of lug, and on the other hand can carry out spacing to the removal of lug.

A further technical solution of the present invention is to provide a grip sleeve locking mechanism that can lock and unlock the axial movement of the grip sleeve.

The further technical scheme of the invention is that the grip sleeve locking mechanism comprises an operating part and a locking block, wherein the operating part can control the locking block to enter and move out of an axial groove on the penholder assembly.

Thus, when the grip sleeve is locked, the grip sleeve cannot move axially, and the mechanical pencil is used as a general mechanical pencil. This gives the user the opportunity to select when the user does not want to use the lead guard of the mechanical pencil to lock the grip.

Drawings

The specific contents of the present invention will be further explained below with reference to the drawings and examples.

FIG. 1: the invention is a schematic outline structure.

FIG. 2: a partial structural schematic diagram of a first structural scheme of example 1.

FIG. 3: fig. 2 is a partially enlarged schematic structural view of the writing tip.

FIG. 4: fig. 2 is a perspective view of a linkage.

FIG. 5: fig. 2 is a sectional view a-a.

FIG. 6: a partial structural schematic diagram of a second structural scheme of example 1.

FIG. 7: fig. 6 is a sectional view taken along line B-B.

FIG. 8: the structure ofembodiment 2 is schematically shown.

FIG. 9: schematic structural diagram of example 3.

FIG. 10: the structure of the grip sleeve locking mechanism after the outer grip sleeve is removed is shown schematically.

Detailed Description

As shown in the figure, the pen comprises apen holder component 1 and apen core component 2 arranged in thepen holder component 1, wherein aholding sleeve 4 which is held by a hand during writing is arranged outside thepen holder component 1, theholding sleeve 4 can axially move in a certain range relative to thepen holder component 1, apen core sheath 5 is arranged at the front end of thepen holder component 1, and thepen core sheath 5 and theholding sleeve 4 have a linkage structure.

Example 1: in this embodiment, alinkage member 6 is arranged in thepen holder assembly 1, thelinkage member 6 axially extends to the lower end of thepen holder assembly 1, the number of thelinkage member 6 is two, the two linkage members are respectively located at symmetrical positions at two sides of thecartridge assembly 2, anaxial groove 7 matched with thelinkage member 6 in shape is arranged in the inner cavity of thepen holder assembly 1 corresponding to the position of thelinkage member 6, and thelinkage member 6 is sunk in theaxial groove 7. The lower end of thelink 6 abuts against thecartridge sheath 5. Thelinks 6 at both sides are integrally connected by an annular connectingportion 61, and theannular connecting portion 61 surrounds the outer circumference of thecartridge assembly 2. Thus, thelink 6 is guided by theaxial groove 7, and the portions on both sides act simultaneously, and pressure can be applied uniformly to thecartridge sheath 5.

Alug 41 extending into the penholder assembly is arranged on theholding sleeve 4, and thelug 41 is abutted against thelinkage piece 6, so that thelinkage piece 6 is pushed by thelug 41 to move thelinkage piece 6 downwards when writing pressure is applied to theholding sleeve 4. Thecartridge sheath 5 extends into thepen holder assembly 1 to form asheath seat 51, and meanwhile, in consideration of the problems of assembly, material performance and manufacturing, thesheath seat 51 and thecartridge sheath 5 are arranged into two independent parts which are connected into an integral structure through tight fit. Thelinkage 6 is abutted against the end face of thesheath seat 51. Acompression spring 55 is arranged between thesheath seat 51 and thepenholder assembly 1, and thecompression spring 55 can enable thecartridge sheath 5 to move upwards when the writing pressure on theholding sleeve 4 is relieved and drive thelinkage piece 6 and theholding sleeve 4 to move upwards.

Theprojections 41 are arranged in pairs, and the pairs ofprojections 41 are symmetrically distributed with respect to the axis corresponding to the position of thelink member 6. Likewise, the force of theprojection 41 on thelinkage 5 is balanced, and the transmission of the movement is facilitated.

Anaxial slot 11 is formed on thebarrel assembly 1 at a position corresponding to theprojection 41, theslot 11 can accommodate theprojection 41 to enter or pass through theslot 11, and meanwhile, theslot 11 has a certain axial space which can allow theprojection 41 to axially move in theslot 11 within a certain range.

Wherein, the structural scheme ofrecess 7 and fluting 11 is: thegroove 7 on thepenholder component 1 penetrates through the inner wall of thewhole penholder component 1, and thegroove 7 and theopen slot 11 are positioned at the upper side and the lower side of the same position and are mutually connected to form a continuous slot. This construction makes the construction of the barrel assembly easier to manufacture.

Wherein, thegroove 7 and the structural scheme of theslot 11 are that: thegroove 7 on thepenholder component 1 does not penetrate through the inner wall of thewhole penholder component 1, thegroove 7 and theslot 11 are also positioned at the upper side and the lower side of the same position, the lowest end of theslot 11 is the inner wall of thepenholder component 1 outside thegroove 7, and the inner wall of thepenholder component 1 can limit the movement limit position of thelug 41 positioned in theslot 11.

Example 2: in the embodiment, alinkage 6 is arranged in thepen holder assembly 1, the linkage is annular, and the lower end of thelinkage 6 abuts against thepen core sheath 5. Theholding sleeve 4 is provided with at least two or more than twolugs 41 extending into the penholder assembly, thelugs 41 are uniformly distributed along the circumference, and thelugs 41 penetrate through the axialopen slot 11 on thepenholder assembly 1 and extend into corresponding radial holes on thelinkage piece 6.

Example 3: in this embodiment, thegrip 4 is provided with aprotrusion 41 extending into the barrel assembly, and theprotrusion 41 is directly abutted against thecartridge sheath 5. Thebumps 41 are at least two or more and are uniformly distributed along the circumference.

In the invention, a holding sleeve locking mechanism can be arranged, and the holding sleeve locking mechanism can lock and unlock the axial movement of the holding sleeve. Thus, when the grip sleeve is locked, the grip sleeve cannot move axially, and the mechanical pencil is used as a common mechanical pencil without a core protecting function. This gives the user the opportunity to select when the user does not want to use the lead protecting function of the mechanical pencil to lock the grip.

The grip sleeve locking mechanism can be as follows: comprises anoperating part 81 and alocking block 82, wherein theoperating part 81 can control thelocking block 82 to enter and move out of theaxial slot 11 on the penholder assembly.

Fig. 10 shows a grip lock mechanism of a simple structure in which an opening needs to be opened in thegrip 4 to expose themanipulation portion 81 outside thegrip 4. Of course, a more complicated structure may be provided such that the manipulatingportion 81 is not located within the position of thegrip sleeve 4, thereby eliminating the need for an opening on thegrip sleeve 4.

The holding sleeve locking mechanism can also have other various structural forms, can be locked on the end surface of the holding sleeve, can also be locked in the middle of the holding sleeve, and can also be arranged on the holding sleeve to be locked on the penholder assembly.

In the present invention, directional means that the axial direction of the mechanical pencil is toward one end of the cap, and directional means that the axial direction of the mechanical pencil is toward one end of the writing end.

Claims (7)

1. The utility model provides a propelling pencil with protect core function, includes pen-holder subassembly and sets up the refill subassembly in the pen-holder subassembly, its characterized in that: a holding sleeve for holding by a hand during writing is arranged outside the pen holder component, the holding sleeve can axially move in a certain range relative to the pen holder component, and the front end of the pen holder component is provided with a cartridge sheath; a linkage piece is arranged in the pen holder component, the lower end of the linkage piece is abutted against the pen core sheath, and the linkage piece is linked with the holding sleeve; the holding sleeve is provided with a lug extending into the penholder assembly, and the lug abuts against the linkage piece, so that the linkage piece is pushed by the lug to move downwards when writing pressure is applied to the holding sleeve; in addition, a reset mechanism is arranged, the reset mechanism can enable the linkage piece to move upwards when the writing pressure on the holding sleeve is relieved, and the reset mechanism is a compression spring.

2. The mechanical pencil with a lead protecting function according to claim 1, wherein: the number of the linkage parts is two, the lugs are arranged in pairs, and the linkage parts and the lugs are symmetrically distributed relative to the axis.

3. The mechanical pencil with a lead protecting function according to claim 2, wherein: the linkage members at both sides are connected integrally by an annular connecting portion surrounding an outer ring of the cartridge assembly.

4. The mechanical pencil with a lead protecting function according to claim 1, wherein: the reset mechanism acts on the pen core sheath to enable the pen core sheath to move upwards.

5. The mechanical pencil having a lead protecting function according to claim 1, 2, 3 or 4, wherein: the pen holder assembly is provided with an axial slot corresponding to the position of the lug, the slot can accommodate the lug to enter or pass through the slot, and meanwhile, the slot has a certain axial space and can allow the lug to axially move in the slot within a certain range.

6. The mechanical pencil having a lead protecting function according to claim 5, wherein: a grip sleeve locking mechanism is provided which is capable of locking and unlocking the axial movement of the grip sleeve.

7. The mechanical pencil having a lead protecting function according to claim 6, wherein: the grip sleeve locking mechanism comprises an operating part and a locking block, wherein the operating part can control the locking block to enter and move out of the axial groove on the pen holder assembly.

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