JP2001071675A - Writing utensil - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain enough pinching force of a clip without hindering smooth installing properties of a cap. SOLUTION: A spherical part 41 is provided on the inner surface at the lower end part of a clip 4 made of a metal plate. The spherical part 41 is projected downward beyond the opening edge of a cap main body 3. A holding projection 31 is provided on the outer peripheral surface of the intermediate part of the cap main body 3. When the cap 2 is installed on the pen point side of a writing utensil main body 5, the holding projection 31 and the inner surface of the clip 4 are urged against each other and, at the same time, the outer surface of the writing utensil main body 5 and the spherical part 41 are set to be opposite to each other under a non-contact state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a writing instrument.
More specifically, the present invention relates to a writing implement in which a cap having a clip is detachably provided on a pen tip side of a writing implement main body. In the present invention, “upper” refers to the closed side of the cap, and “lower” refers to the open side of the cap.

[0002]

2. Description of the Related Art Conventionally, a clip made of an elastic piece such as a metal plate is attached to an outer surface of a cap body, and a lower end of the clip is projected below a lower end of the cap body. There has been known a writing implement having a clip structure in which a cap is attached to a pen tip side of a writing implement main body, and an object to be clamped is sandwiched between the ball portion and an outer surface of the writing implement main body.

[0003]

The above-mentioned conventional writing implement is
In order to obtain a sufficient pinching force between the ball portion of the clip and the outer surface of the writing instrument main body, it is preferable to apply tension to the clip inward in the radial direction in advance. Thereby, as shown in FIG. 5, when the cap 2a is attached to the pen tip side of the writing implement main body 5a, the ball portion 41a of the clip 4a and the writing implement main body 5a
a may come into contact with the outer surface and a smooth cap installation may be impaired. Therefore, conventionally, a large tension cannot be applied to the clip in advance, and a sufficient clamping force has not been obtained. In addition, in the case of the conventional structure in which the ball portion of the clip contacts the outer surface of the writing instrument body with a weak tension, the clip requires high dimensional accuracy.

[0004] The problem that the contact between the ball portion of the clip and the outer surface of the writing instrument body hinders the smooth mounting of the cap is, as shown in FIG. This is likely to occur when a non-slip grip portion 51a such as an uneven portion or a rubber grip is provided on the outer surface.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems, and does not require the dimensional accuracy of the clip, can obtain a sufficient clamping force of the clip, and impairs the smooth mounting of the cap. It is intended to provide a writing instrument that will never be used.

[0006]

Means for Solving the Problems [1] In the present invention, the cap 2 provided with the clip 4 is attached to the pen tip 52 of the writing implement body 5.
A writing instrument 1 detachably provided on the side, a ball portion 41 is provided on a lower inner surface of the clip 4, and the ball portion 41 is protruded downward from an opening end of the cap body 3 and an intermediate portion of the cap body 3. When the support projection 31 is provided on the outer peripheral surface and the cap 2 is mounted on the pen tip 52 side, the support projection 31 and the inner surface of the clip 4 are brought into pressure contact with each other, and
1 and the outer surface of the writing implement body 5 are opposed to each other (claim 1). (See FIGS. 1 and 2)

(Operation) Since the support projection 31 presses and supports the inner surface of the clip 4, a large radially inward tension can be applied to the clip 4 in advance.
As a result, the dimensional accuracy of the clip is not required and the ball 41
Sufficient clamping force is easily obtained between the writing tool main body 5 and the outer surface of the writing implement main body 5 or between the support projection 31 and the inner surface of the clip 4.

Further, since most of the radially inward biasing force of the clip 4 is supported by the support projection 31, even if the ball portion 41 comes into contact with the outer surface of the writing implement main body 5, the cap 2 The smooth mounting of the cap 2 is possible without hindering the smooth mounting of the cap 2.

[2] In the writing implement 1 of the first aspect,
When the cap 2 is mounted on the pen tip 52 side, the support projection 31 and the inner surface of the clip 4 are pressed against each other, and the ball 41 and the outer surface of the writing implement main body 5 are opposed to each other in a non-contact state. (Claim 2) is preferred. (See Fig. 1)

(Operation) The inner surface of the clip 4 is pressed and supported by the support projection 31, and when the cap 2 is attached to at least the pen tip 52 of the writing instrument main body 5, the outer surface of the writing instrument main body 5 and the ball 41 are connected to each other. Is in a non-contact state,
The cap 2 can be mounted more smoothly.

[3] In the writing instrument 1 of the second aspect,
A non-slip grip portion 51 is provided on the pen tip side outer surface of the writing instrument main body 5, and when the cap 2 is mounted on the pen tip 52 side, the non-slip grip portion 51 and the ball portion 41 face each other in a non-contact state. (Claim 3) is preferable.

(Operation) The non-slip grip portion 51 and the ball portion 4
1 is opposed to the non-contact state, so that the trouble caused by the contact between the non-slip grip portion 51 and the ball portion 41 (that is, a remarkable decrease in the capping property) is eliminated, and the cap is smoothly mounted. Becomes possible. Further, the object to be clamped is sufficiently held between the non-slip grip portion 51 and the ball portion 41, and the object to be clamped can be further prevented from falling off by the frictional force of the non-slip grip portion 51.

[4] In the writing instrument 1 of the first aspect,
When the cap 2 is mounted on the pen tip 52 side, the support projection 31 and the inner surface of the clip 4 are pressed against each other, and the ball portion 41 and the outer surface of the writing implement body 5 are pressed against each other. 4) is preferred. (See Fig. 2)

(Operation) Since the support projection 31 supports most of the radially inward biasing force of the clip 4, even if the ball portion 41 and the outer surface of the writing implement main body 5 come into contact with each other,
The smooth mounting of the cap 2 is not hindered, and the cap 2 can be smoothly mounted. In addition, since the ball portion 41 and the outer surface of the writing implement main body 5 are in pressure contact with each other, the held object can be stably held even if the object to be held is thin.

[5] In the writing instrument 1 of the fourth aspect,
A non-slip grip portion 51 made of an elastic material is provided on the outer surface of the writing tool main body 5 on the pen tip 52 side, and when the cap 2 is mounted on the pen tip 52 side, the non-slip grip portion 51 and the ball portion 41 are provided.
Are preferably pressed against each other (claim 5).

(Operation) By pressing the non-slip grip portion 51 and the ball portion 41 against each other, the object to be held is sufficiently held between the non-slip grip portion 51 and the ball portion 41, With the frictional force of the non-slip gripping portion 51, falling off of the held object can be further suppressed.

Further, since the non-slip grip 51 is made of an elastic material, it is possible to absorb variations in contact between the ball 41 and the non-slip grip 51. As a result, it is possible to sufficiently avoid a problem in which the ball portion 41 and the non-slip gripping portion 51 come into contact with each other and the support protrusion 31 and the inner surface of the clip 4 do not contact each other.
The pressure contact state between the support protrusion 31 and the inner surface of the clip 4 and the pressure contact state between the ball portion 41 and the non-slip grip portion 51 are maintained.

(Non-Slip Grip) The non-slip grip 51 according to claim 3 may be made of an elastic material such as synthetic rubber, or may be made of an uneven shape, or a combination thereof. Further, the non-slip grip portion 51 made of an elastic material according to the above-mentioned claim 5 may be made of synthetic rubber, thermoplastic elastomer, or the like.

(Ball portion) The ball portion 41 according to any one of claims 1 to 5 has a function of sandwiching between the outer surface of the writing implement main body 5 by facing the outer surface of the writing implement main body 5. Specifically, the ball portion 41 is formed integrally with the lower inner surface of the clip 4 by bending or the like, or the ball portion 41 formed of a separate member is fixed to the lower inner surface of the clip 4. There may be.

(Supporting protrusion) The supporting protrusion 31 according to any one of claims 1 to 5 is provided at an intermediate portion of the clip 4 (the mounting leg portion 4).
2 and an intermediate portion of the ball portion 41) have a pinching function between the inner surface and
Besides the ball 41 (first ball) at the lower part of the clip 4,
It constitutes a holding portion (second ball portion).

(Clip) The clip according to any one of claims 1 to 5 is made of an elastic piece (for example, a metal plate piece, a plastic plate piece, or the like).

[0022]

Embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows a first embodiment of a writing instrument 1 according to the present invention.

The writing implement 1 includes a writing implement main body 5 and a cap 2 that can be attached to the pen tip 52 side of the writing implement main body 5. The writing implement main body 5 has a pen tip 52 (for example, a ballpoint pen tip) at the tip. And the cap 2
Comprises a cap body 3 and a metal plate clip 4 attached to the upper end of the cap body 3.

The cap body 3 is a cylindrical body obtained by injection molding of a synthetic resin (for example, polypropylene resin or the like) having a closed upper end and an open lower end.

A mounting projection 32 is integrally provided on the outer peripheral surface of the upper end portion of the cap body 3, and a mounting hole 33 which opens upward is provided therein.

The mounting projection 32 of the cap body 3
A support protrusion 31 formed of a plate-like rib extending in the axial direction is integrally formed on the outer peripheral surface below the lower surface. The support projection 31
The lower surface has an inclined surface or a curved surface, and the top surface has a curved surface, thereby facilitating insertion of an object to be held (for example, a pocket of clothes, a notebook, etc.).

At the upper end of the clip 4, a mounting leg 42 is formed by inward bending into a U-shape, while at the lower end of the clip 4, an inwardly bent portion is formed. The ball portion 41 is formed by processing. The mounting leg 42 is press-fitted and fixed to the mounting hole 33 of the mounting projection 32 of the cap body 3. The support projection 31 is pressed against the inner surface of the intermediate portion of the clip 4 (that is, the intermediate portion between the mounting leg portion 42 and the ball portion 41).

A non-slip grip 51 made of an elastic material such as synthetic rubber or thermoplastic elastomer is provided on the outer surface of the writing implement main body 5 on the pen tip 51 side. Further, on the outer surface of the non-slip grip 51, an uneven pattern including a plurality of annular convex portions and annular concave portions is formed.

After the cap mounting process and after the cap mounting,
A gap 6 is formed between the non-slip grip portion 51 and the ball portion 41, and the non-slip grip portion 51 and the ball portion 41 are formed.
Non-contact state is maintained.

FIG. 2 shows a second embodiment of the writing instrument 1 according to the present invention. The difference from the first embodiment is that when the cap 2 is attached to the pen tip 52 of the writing instrument main body 5, the ball 41 at the lower end of the clip 4 is pressed against the non-slip grip 51 made of an elastic material, The inner end of the ball portion 41 is slightly buried in the grip portion 51. In addition, other configurations (for example, the cap body 3, the clip 4, the writing implement body 5, and the support protrusion 3)
The configuration in which 1 presses against the inner surface of the clip 4 is the same as that in the first embodiment, and a description thereof will be omitted.

FIGS. 3 and 4 show another example of the ball portion 41 of the clip 4. FIG. The ball portion 41 of the clip 4 in FIG. 3 is configured by projecting a lower portion (that is, near the lower end portion) of the clip 4 made of a metal plate into a C-shaped cross section by pressing inward. The ball portion 41 of the clip 4 in FIG. 4 is formed by slightly inclining the lower portion of the clip 4 made of a metal plate inward and bending the lower end portion of the clip 4 outward in a ring shape in cross section. Be composed.

The cap 2 of FIG. 3 and the cap 2 of FIG.
In the first embodiment (FIG. 1), the ball portion 41 and the outer surface of the writing instrument main body 5 (the outer surface of the non-slip grip portion 51) are in a non-contact state when attached to the pen tip side of the writing instrument main body 5. Alternatively, as in the second embodiment (FIG. 2), the ball portion 41 and the outer surface of the writing instrument main body 5 (the outer surface of the non-slip grip portion 51) may be in a pressure-contact state.

The other structures of the cap 2 of FIG. 3 and the cap 2 of FIG. 4 are the same as those of the first and second embodiments.

[0035]

According to the first aspect, a sufficient holding force of the clip can be easily obtained, and at the same time, the cap can be smoothly mounted.

According to the second aspect, the cap can be more smoothly mounted.

According to the third aspect, the cap can be mounted more smoothly. Further, the object to be clamped can be sufficiently sandwiched between the non-slip grip portion and the ball portion, and the falling of the object to be clamped can be further suppressed.

According to the fourth aspect of the present invention, the mountability of the cap is not hindered, and the held object can be stably held even if the object to be held is thin.

According to the fifth aspect, the object to be clamped is sufficiently held between the anti-slip grip portion and the ball portion, and the object to be clamped can be further prevented from falling off. Further, variations in contact between the ball portion and the non-slip grip portion can be absorbed, and the contact between the support protrusion and the inner surface of the clip is further maintained.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a first embodiment of the present invention.

FIG. 2 is a longitudinal sectional view showing a second embodiment of the present invention.

FIG. 3 is a longitudinal sectional view showing another example of a cap applied to the present invention.

FIG. 4 is a longitudinal sectional view showing another example of a cap applied to the present invention.

FIG. 5 is a diagram illustrating a conventional problem.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Writing implement 2 Cap 3 Cap main body 31 Support projection 32 Mounting convex part 33 Mounting hole 4 Clip 41 Ball part 42 Mounting leg part 5 Writing implement main body 51 Non-slip grip part 52 Pen tip 6 Clearance

Claims (5)

[Claims] 1. A writing instrument in which a cap having a clip is detachably provided on a pen tip side of a writing instrument body, wherein a ball portion is provided on an inner surface of a lower portion of the clip, and the ball portion is located below an opening end of the cap body. And a support projection is provided on the outer peripheral surface of the intermediate portion of the cap body, and when the cap is mounted on the pen tip side, the support projection and the inner surface of the clip are pressed against each other, and the ball portion and the A writing implement characterized in that the outer surface of the writing implement main body is opposed to the writing implement main body. 2. When the cap is mounted on the pen tip side, the support projection and the inner surface of the clip are brought into pressure contact with each other, and the ball portion and the outer surface of the writing implement main body are opposed to each other in a non-contact state. Item 3. The writing implement according to Item 1. 3. A non-slip grip portion is provided on the pen tip side outer surface of the writing instrument main body, and when the cap is mounted on the pen tip side, the non-slip grip portion and the ball portion face each other in a non-contact state. The writing implement according to claim 2. 4. The writing device according to claim 1, wherein when the cap is mounted on the pen tip side, the support projection and the inner surface of the clip are pressed against each other, and the ball portion and the outer surface of the writing implement body are pressed against each other. Writing implement. 5. A non-slip grip portion made of an elastic material is provided on an outer surface of a pen tip side of a writing instrument main body, and when the cap is mounted on the pen tip side, the non-slip grip portion and the ball portion are pressed against each other. The writing implement according to claim 4.