JP2001310588A - Writing utensil - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase a degree of freedom of design for the turn working part and to enable the part to have a dihedral width function and a knurling function about the writing utensil with turn working part. SOLUTION: A plug 3 is fixed by means of screwing at the opening of a tube 2. A turn working part 31 is installed on the outer spherical surface of the plug 3 (tail plug or pen holder). The turn working part 31 consists of a dihedral width part where a spanner can be used. The dihedral width part consists of plural projection parts 31a arranged on the outer spherical surface of the plug 3 at a proper interval in the circular direction.

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 instrument in which a plug is screwed into an opening of a shaft cylinder and a rotation operation unit is provided on an outer peripheral surface of the plug. still,
In the present invention, “front” refers to the pen tip side, and “rear” refers to the tail plug side.

[0002]

2. Description of the Related Art Conventionally, in a writing instrument of this type, for example, Japanese Utility Model Laid-Open Publication No. Sho 56-110980 discloses a two-sided width portion which can be used with a spanner as a rotating operation portion of a pen tip holder.
Also disclosed is a knurled section which is directly picked and rotated by a finger. Further, in the publication, as the two-plane width portion,
A hexagonal flange and a flange having a circular shape in which opposing sides are cut off in parallel are illustrated.

[0003]

The shape of the conventional rotary operation unit is limited to a common one as described above.
There were design constraints in creating a highly creative shape.

In addition, in the case of the conventional rotary operation unit, it is not easy to directly rotate the finger with a finger in the case of a two-plane width portion, while it is not easy to apply a wrench in the case of a knurl portion. In other words, the conventional rotary operation unit can perform only one of a rotation operation using a spanner and a rotation operation directly with a finger in one rotation operation unit, and there is no choice in an operation method.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems, in which the degree of freedom in design of a rotary operation unit is increased, and the rotary operation unit has a function of a flat surface width and a function of a knurl. It is intended to provide a writing instrument capable of performing the following.

[0006]

Means for Solving the Problems [1] The present invention relates to a shaft cylinder 2
The plugs 3 and 4 are screwed into the openings of the plugs 3 and 4, and rotation operation units 31 and 41 are provided on the outer peripheral surface of the plugs 3 and 4.
Writing implements 1 and 41 each consisting of a two-sided width part that can be used with a spanner
And a plurality of convex portions 31 in which the two-plane width portions are dispersedly arranged on the outer peripheral surfaces of the plugs 3 and 4 at appropriate intervals in the circumferential direction.
a, 41a (claim 1).

When a wrench is applied to the width across flat surface, one side of the engagement inner surface of the wrench 5 has a pair of adjacent protrusions 31a.
31a, 41a, and 41a.
The opposite sides of the engagement inner surfaces of the projections 31a, 31a, 41a
a · a pair of adjacent convex portions 3 located on the opposite side of 41a
1a, 31a, 41a, 41a
Thereby, the rotation operation of the rotation operation units 31 and 41 becomes possible.
In other words, the engagement inner surface of the spanner engages with the two-plane width portion formed of the pair of adjacent protrusions 31a, 31a, 41a, 41a on the opposite side to the pair of adjacent protrusions 31a, 41a. , 41 can be operated. In addition, the protrusion 31
The rotating operation portions 31 and 41 formed of the a and 41a can obtain a higher frictional force than a conventional two-sided width portion such as a hexagonal shape, and can be easily rotated by directly picking with a finger.

That is, the rotary operation portions 31 and 41 composed of the convex portions 31a and 41a have a knurl function of directly picking and rotating with a finger, in addition to a two-sided width function. Thereby,
For users with strong finger power, there is no need to use a spanner,
An easy rotation operation with a finger is made possible, while a user with a weak finger force is made easy to operate with a spanner, and the user can be provided with two operation methods.

[0009] Further, the two-plane width portions are formed as convex portions 31a, 41a.
, The convex portions 31 having various shapes
a, 41a can be set, the variation in design of the rotary operation units 31, 41 can be expanded, and the appearance of the plugs 3, 4 can be made into a shape rich in creativity. The convex portions 31a,
As the 41a, for example, a vertical rib, a point-like projection, or the like can be given.

[2] In the writing implement 1 of the first aspect,
It is preferable that the two-sided width portion is composed of at least four and even-numbered convex portions 31a and 41a which are distributed and arranged at equal intervals in the circumferential direction on the outer peripheral surfaces of the plugs 3 and 4 (claim 2). .

As a result, a plurality of types of spanners can be hung, so that when the spanner is hung, the trouble of confirming the position of the width across flats of the plugs 3 and 4 can be omitted, and the hanger can be hung quickly.

In consideration of the strength of the width across flat portion, four, six, or eight convex portions 31a and 41a are provided in the circumferential direction.
It is preferable to provide them. That is, the protrusions 31a, 4
When 1a is 10 or more, the adjacent convex portions 31a and 31
The distance between a, 41a and 41a is reduced, and the strength of the width across flats may be insufficient.
If the number of 41a is less than four, the function of the width across flats is not performed.

[3] In the writing instrument 1 of the first or second aspect, it is preferable that the plug is a tail plug 3 screwed into a rear end opening of the barrel 2 (claim 3). Thereby, the tail plug 3 having the rotation operation unit 31 of claim 1 (that is, the rotation operation unit having the two-face width function and the knurl function and increasing the degree of freedom in design), or the rotation of claim 2 The tail plug 3 having the operation unit 31 (that is, the rotation operation unit that can be quickly wrenched) is obtained.

[4] In the writing implement 1 of the first or second aspect, the stopper is a pen point holder 4 which is screwed into a front end opening of the barrel 2 and holds a pen point 43a. 4) is preferred. Accordingly, the pen point holder 4 having the rotary operation unit 41 of claim 1 (that is, a rotary operation unit having a two-face width function and a knurl function, and increasing the degree of freedom in design), or the pen tip holder of claim 2 Rotation operation part 4
1 (that is, a rotary operation unit capable of quick spanner application) can be obtained.

The plugs 3 and 4 of the present invention are configured to be detachable from the opening of the barrel 2 so that they can be replaced or ink can be replenished from the opening of the barrel 2. Can be Further, the plugs 3 and 4 of the present invention can adjust the resilient force of the pen tip holder 4 that adjusts the pen tip extension length, the spring housed inside the barrel 2, and the air pressure inside the barrel 2. May be a tail plug 4 having a function of adjusting the temperature.

In the present invention, the adjacent convex portions 31a
31a, 41a and 41a (that is, recesses 31b, 4
1b) is preferably configured so as not to be in contact with the engagement inner surface of the wrench 5, but even if it is brought into contact with the engagement inner surface of the wrench 5, the adjacent convex portions 31a, 31a, 41a
-41a may be the structure which contacts the engagement inner surface of the spanner 5.

[0017]

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

(First Embodiment) FIGS. 1 and 2 show a first embodiment of a writing instrument 1 according to the present invention. The writing implement 1 includes a barrel 2 in which an ink occluding body 21 is accommodated, and a tail plug 3 (plug) that is detachably screwed into a rear end opening of the barrel 2.

The tail plug 3 projects from the rear end of the barrel 2 to the outside and is in contact with the rear end of the barrel 2.
And a screwed portion 32 that is screwed to the inner surface of the shaft cylinder 2 and is a bottomed cylindrical body obtained by molding a synthetic resin.

The rotary operation part 31 is constituted by six axially extending projections 31a arranged at equal intervals in the circumferential direction on the outer peripheral surface of the tail plug 3 protruding outside from the rear end of the shaft cylinder 2. Is done. Of the six convex portions 31a, a pair of adjacent convex portions 31a, 31a, and a pair of convex portions 31a, 31a at axially symmetric positions with the adjacent convex portions 31a, 31a form a two-plane width portion that can be used with a spanner. Is done. With the six convex portions 31a, three types of width across flats are obtained. The rotation operation unit 31 of the tail plug 3 includes:
Since it is constituted by the plurality of convex portions 31a, it does not have a common shape such as a hexagonal cross section and has a unique appearance.

An external thread portion is formed on the outer surface of the threaded portion 32, while an internal thread portion which can be screwed with the external thread portion is formed on the inner surface of the rear end opening of the barrel 2. You. The front end of the screwing portion 32 is in contact with the rear end of the ink storage body 21. A notch is provided at the front end of the screwing portion 32 so that the rear end surface of the ink occluding body 21 and the shaft cylinder 2 can be cut out.
The inside and the outside are made air circulation possible.

The ink occluding body 21 is a member made of a processed fiber bundle or a porous body and can be impregnated with ink. Ink can be supplied to the ink storage body 21 from the rear end opening of the barrel 2 from which the tail plug 3 is removed. Further, it is possible to take out the ink occluding body 21 from the inside of the barrel 2 and make the ink occluding body 21 refillable with ink, or replace it with a new ink occluding body 21.

(Second Embodiment) FIG. 3 shows a second embodiment of the writing instrument 1 of the present invention. This embodiment is a modification of the first embodiment, and is different from the first embodiment in that six concave portions 31b are provided at equal intervals in the circumferential direction on the outer peripheral surface of the tail plug 3 having a circular cross section. Six convex portions 31a are formed between the concave portions 31b,
The point lies in that the rotation operation unit 31 is constituted by the plurality of projections 31a. Other configurations, functions and effects are the same as those of the first embodiment.

(Third Embodiment) FIG. 4 shows a writing instrument 1 according to a third embodiment of the present invention. This embodiment is a modification of the first embodiment, and is different from the first embodiment in that the protrusions 31a formed of two point-like projections are provided at six places on the outer peripheral surface of the tail plug 3 having a circular cross section. Are formed at equal intervals in the circumferential direction, and the six convex portions 31a
In that the rotary operation unit 31 is constituted by Other configurations, functions and effects are the same as those of the first embodiment.

(Fourth Embodiment) FIGS. 5 and 6 show a fourth embodiment of the present invention. This embodiment is an example in which the same rotary operation unit 41 as the first embodiment is applied to the pen tip holder 4. The pen tip holder 4 has a tapered pen tip holding part 43 for holding a pen tip 43a (for example, a resin processed body of fiber), a rotary operation part 41 connected to the pen tip holder 4, and This is a tubular body obtained by molding a synthetic resin, which is provided with a threaded portion 42 connected to the operation portion 41 and screwed to the inner surface of the front end opening of the shaft cylinder 2.

The front end of the ink occluding body 2 has a pen tip 4
At the same time as being connected to the rear end of the pen tip holder 3a in a piercing manner, it is in axial contact with a rib 43b formed on the inner surface of the pen tip holder 43 of the pen tip holder 4.

The rotation operation section 41 is, as in the first embodiment,
Along the outer peripheral surface of the pen tip holder 4 protruding outward from the front end of the barrel 2, an axially extending 6 disposed at equal intervals in the circumferential direction.
It is composed of the convex portions 41a of the book.

The rotary operating section 41 is rotated by the spanner 5 to remove the pen point holder 4 together with the pen point 43a from the front end opening of the barrel 2. Then, the ink can be replenished to the front end of the ink occluding body 21 housed in the barrel 2. The other configuration, operation and effect are the same as in the first embodiment.

(Others) In the present invention, although not shown, the pair of adjacent convex portions 31a, 31a, 4
A projection that does not come into contact with the engagement inner surface of the spanner 5 when the spanner is hooked (that is, a projection that does not have the width across flats) may be provided between 1a and 41a (that is, the recesses 31b and 41b). Thereby, the knurl function can be improved at the same time as the decorative effect is increased.

[0030]

According to the first aspect of the present invention, the degree of freedom in design of the rotary operation unit is increased, and the rotary operation unit can simultaneously have the two-plane width function and the knurl function.

According to the second aspect of the present invention, a plurality of types of spanners can be hooked up. Therefore, when the spanner is hooked up, it is not necessary to check the position of the width across flat portion of the plug, and the spanner can be hooked up quickly.

According to the third aspect, a tail plug having a two-face width function and a knurling function and having a rotating operation part for increasing the degree of freedom in design, or a tail having a rotating operation part capable of quick spanner hanging. A stopper can be obtained.

According to the fourth aspect of the present invention, there is provided a nib holder having a two-sided width function and a knurling function and having a rotary operation part for increasing the degree of freedom in design, or a rotary operation part capable of quick spanner hanging. A nib holder can be obtained.

[Brief description of the drawings]

FIG. 1A is a plan view of a first embodiment of the present invention, and FIG.
FIG.

FIG. 2 is a longitudinal sectional view of a main part of FIG.

FIG. 3A is a plan view of a second embodiment of the present invention, and FIG.
FIG.

FIG. 4A is a plan view of a third embodiment of the present invention, and FIG.
FIG.

FIG. 5A is a plan view of a fourth embodiment of the present invention, and FIG.
FIG.

FIG. 6 is a longitudinal sectional view of a main part of FIG. 5;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Writing implement 2 Shaft cylinder 21 Ink occlusion body 3 Tail plug (plug) 31 Rotation operation part 31a Convex part 31b Depression 32 Screw part 4 Nib holder (plug) 41 Rotation operation part 41a Convex part 41b Depression 42 Screw part 43 Pen tip holder 43a Pen tip 43b Rib 5 Spanner

Claims (4)

[Claims] A plug (3, 4) is screwed into an opening of a shaft cylinder (2), and a rotation operation part (3) is attached to an outer peripheral surface of the plug (3, 4).
1, 41), wherein the rotary operation part (31, 41) is a writing instrument comprising a two-sided width portion capable of being wrenched, and the two-sided width portion is provided on the outer peripheral surface of the plug (3, 4). A plurality of protrusions (31a, 41) dispersed and arranged at appropriate intervals in the circumferential direction.
a writing implement characterized by comprising a). 2. The at least four and even-numbered convex portions (31a, 41a), which are distributed at regular intervals in the circumferential direction on the outer peripheral surface of the plug (3, 4). The writing implement according to claim 1. 3. The writing instrument according to claim 1, wherein the plug is a tail plug (3) screwed into a rear end opening of the barrel (2). 4. The writing instrument according to claim 1, wherein the stopper is a nib holder (4) which is screwed into a front end opening of the barrel (2) and holds a nib (43a).