JP2502519Y2 - Writing instrument - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a writing instrument in which a writing-out mechanism of the writing instrument is assembled in a tip tool.

[Prior art]

For example, in a conventional ballpoint pen, a ballpoint pen refill is inserted into an outer cylinder, and a retraction spring is inserted between a receiving portion of the refill and a step portion provided on a tip of the outer cylinder.
A rotating cam mechanism consisting of a rotating cam, a cam bar, and a cam body is provided in the rear part of the outer cylinder, and by knocking the cam bar protruding from the rear end of the outer cylinder, the pen tip of the ball-point pen refill can be retracted. There is.

In this conventional ballpoint pen, when the cam bar is knocked against the retracting spring, the rotary cam meshed with the cam bar rotates a predetermined angle and engages with the cam body, so that the tip of the ball-point pen refill comes out of the tip of the outer cylinder. Is kept protruding,
Can write down. If you knock the cam bar again,
The rotation cam and the cam body are disengaged, the rotation cam, the cam bar, and the ball-point pen refill move rearward by the spring force of the retracting spring, and the pen tip retracts from the tip.

[Problems to be solved by the device]

However, in the above-mentioned conventional example, not only a short and compact small-sized writing instrument having a long axial direction cannot be obtained, but also writing instruments having different writing colors are attached to both ends of the outer cylinder. There is a problem that writing instruments cannot be provided.

[Means for solving the problem]

In order to solve the above problems, the writing instrument of the present invention accommodates a cam body 1, a rotary cam 2 that meshes with the cam body 1, a cam bar 3 that meshes with the cam body 3, and an elastic body 9 in a tip tool 6 as shown in the first illustration. Installed, the refill 5 is inserted into the through hole 4 provided in the rotary cam 2 and the cam bar 3, the tip 6 is attached to the outer cylinder 10, and the slide hole 11 is provided in the outer cylinder 10.
Further, the operation sleeve 12 is locked and the operation portion 13 of the operation sleeve 12 is slidably provided in the slide hole 11.

[Action]

When the operating portion 13 is moved forward along the slide hole 11, the cam bar 3 locked to the operating sleeve 12 of the operating portion 13
Is knocked against the elastic body 9, and the rotary cam 2 meshed with the elastic body 9 rotates by a required angle to engage with the cam body 1, and the tip 6
Further, the pen tip 5a of the refill 5 is maintained in a protruding state, and writing can be performed.

Move the operation part 13 forward along the slide hole 11,
When the cam bar 3 locked to the operation sleeve 12 of the operation portion 13 is knocked again, the rotation cam 2 and the cam body 1 are disengaged, and the rotation cam 2, the cam bar 3 and the refill 5 are elastic body 9.
The elastic force causes the pen tip 5a to be retracted from the tip tool 6 by moving backward.

Since the tip body 6 is attached to the cam body 1 containing the rotating cam 2 and the cam bar 2 with the elastic body 9 interposed therebetween, a compact and small writing instrument having a short axial length can be obtained. It will be.

〔Example〕

 An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view showing the construction of the first embodiment of the writing instrument of the present invention, in which 1 is a cam body, 2 is a rotary cam, 3 is a cam bar, and these constitute a known rotary cam mechanism. A rotary cam 2 and a cam bar 3 meshing with the rotary cam 2 are accommodated in the cam body 1 so as to protrude from a rear portion of the cam bar 3.

A refill 5 for a ballpoint pen is inserted through the through holes 4 of the rotary cam 2 and the cam bar 3. The cam body 1 is attached to a tip 6, and a retracting spring 9 is inserted between a step portion 7 of the tip 6 and a receiving portion 8 of the ball-point pen refill 5.

The front tool 6 is attached to an outer cylinder 10 having a closed end by screwing, fitting, or the like. A sliding hole 11 is provided in a front portion of the outer cylinder 10, and an operating sleeve 12 is provided at a rear end of the cam bar 3. The rear locking portion 15 is locked, and the operating portion 13 of the operating sleeve 12 is
Is slidably provided in the slide hole 11. Reference numeral 18 is a clip provided on the rear portion of the outer cylinder 10.

The cam body 1 is extended to a position directly below the operating portion 13, and when the operating portion 13 is operated, the operating sleeve 12 and the operating portion 13 are operated.
Are prevented from falling off.

In the first embodiment, the operation portion 13 is provided with a slide hole 11
When it is moved forward along the direction, the cam bar 3 locked to the locking portion 15 at the rear of the operation sleeve 12 that is integral with the operation portion 13 is knocked against the retracting spring 9 and meshes with the rotary cam. 2 rotates by a required angle and engages with the cam body 1, and the pen tip 5a of the ballpoint pen refill 5 is maintained to project from the tip tool 6 for writing.

When the operation portion 13 is moved along the slide hole 11 and the cam bar 3 is knocked again in the same manner as described above, the rotation cam 2 and the cam body 1 are disengaged, and the rotation cam 2, the cam bar 3 and the ball-point pen refill 5 are released. Is moved rearward by the spring force of the retracting spring 9, and the pen tip 5a is retracted from the tip tool 6.

Since the tip 6 is attached to the cam body 1 containing the rotating cam 2 and the cam bar 3 with the retracting spring 9 interposed, the axial length is short and a compact writing instrument can be obtained. Will be done.

FIG. 2 is a sectional view showing the structure of the second embodiment.
The embodiment is an inner sleeve made of metal that penetrates through the through holes 4 of the rotary cam 2 and the cam bar 3 and adheres closely to the ballpoint pen refill 5.
14 is provided, and the front and rear portions 16 and 17 of the inner sleeve 14 are attached to the end surface of the rotary cam 2 and the rear surface of the refill 5, respectively.
The structure is the same as that of the first embodiment shown in FIG.

According to the second embodiment, in addition to the function of the first embodiment shown in the first illustration, the inner sleeve 14 receives the writing pressure applied to the refill 5 by the writing tool and transmits the writing pressure to the rotary cam mechanism. .

FIG. 3 is a sectional view showing the structure of the third embodiment.
The embodiment is an example in which the rotary cam 2 and the inner sleeve 14 are integrally formed in the second embodiment of FIG. 2, and only the parts of the inner sleeve 14 are simpler than the second embodiment of FIG.

[Effect of device]

As described above, according to the present invention, the cam body 1,
A rotary cam 2 meshing with the cam body 1, a cam bar 3 meshing with the cam body 3 and an elastic body 9 are housed, and a refill 5 is inserted into a through hole 4 provided in the rotary cam 2 and the cam bar 3, The tool 6 is attached to the outer cylinder 10, the slide hole 11 is provided in the outer cylinder 10, the operation sleeve 12 is locked to the cam bar 3,
Since the operation portion 13 of the operation sleeve 12 is slidably provided in the slide hole 11, the axial length is short, and a compact and small writing instrument can be obtained.

[Brief description of drawings]

FIG. 1 is a sectional view showing the construction of a first embodiment of a writing instrument of the present invention, FIG. 2 is a sectional view of a second embodiment, and FIG. 3 is a sectional view of a third embodiment. 1 ... Cam body, 2 ... Rotating cam, 3 ... Cam bar, 4
…… Through hole, 5 …… (for ballpoint pen) refill, 5a…
… Pen tip, 6 …… Tip, 7 …… Step, 8 …… Receiving part, 9 ・ ・ ・
… (Retractable) elastic body (spring), 10 …… Outer cylinder, 11 ……
Hole for slide, 12 …… Operation sleeve, 13 …… Operation part, 14
…… Inner sleeve, 16,17 …… Front and rear.

Claims (5)

(57) [Scope of utility model registration request] 1. A cam body (1), a rotary cam (2) meshing with the cam body (1), a cam bar (3) meshing with the cam body (1) and an elastic body (9) are housed in a tip tool (6). Then, the refill (5) is inserted into the through hole (4) provided in the rotary cam (2) and the cam bar (3), and the tip tool (6) is attached to the outer cylinder (10).
The outer cylinder (10) is provided with a slide hole (11), and the operation sleeve (12) is locked to the cam bar (3).
Writing instrument in which the operating portion (13) of the operating sleeve (12) is slidably provided in the slide hole (11). 2. The writing instrument according to claim 1, wherein the cam body (1) is extended to a lower position of the operating portion (13). 3. A cam body (1) is attached to a tip (6), and a rotary cam (2) meshing with the cam body (1) and a cam bar (3) meshing with the cam body (1) are provided in the cam body (1). The rear part of (3) is housed so as to project, and an elastic body is provided between the step part (7) in the tip tool (6) and the receiving part (8) of the rotary cam (2) or the refill (5). The writing instrument according to any one of claims 1 and 2, wherein (9) is inserted. 4. An inner sleeve (14) made of metal, which penetrates through holes (4) of the rotary cam (2) and the cam bar (3) and is in close contact with the refill (5), is provided in front of the inner sleeve (14). The writing instrument according to any one of claims 1 to 3, wherein the rear portions (16, 17) are attached to the end surface of the rotary cam (2) and the rear surface of the refill (5), respectively. 5. The writing instrument according to claim 4, wherein the rotating cam (2) and the inner sleeve (14) are integrally formed.