JP2542037Y2 - Writing unit haunting device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a retractable device of a writing portion of a writing instrument such as a ball-point pen.

[0002]

2. Description of the Related Art Conventionally, in a writing instrument such as a ball-point pen, a knock button is provided separately from a clip, and a writing section is made to protrude and retract through the knock button. In some cases, when the writing portion is immersed, the engagement between the clip and the locking portion is released, and the clip returns to the storage position by the action of the spring.

[0003]

However, in the above-described conventional writing and retracting device, it is necessary to form a knock button separately from the clip, and similarly, it is necessary to provide a locking portion separately from the clip. In addition, the number of parts and the number of manufacturing steps constituting the writing implement itself are extra, and there is a drawback that it is difficult to sufficiently reduce the cost.

In view of the above, the present invention has been made to improve the above-mentioned drawbacks of the prior art. In addition to using the clip and the knock button together and forming a locking portion between the clip and the barrel, the number of parts and the number of steps are reduced. In order to further reduce prices.

[0005]

For this purpose, at the rear end of the barrel, there is provided a groove extending in the axial direction toward the front from an appropriate position, and a clip shaft for supporting a clip in a narrow portion of the groove. , And a resilient writing portion holder that slides in the shaft cylinder integrally with the clip shaft is inserted, and the holder is a front locking projection that is axially parallel to the side of the clip shaft.
And the rear locking projection , the front locking projection is the rear locking projection
The height of the projections is further increased, and locking portions for engaging with these locking projections are provided on the side of the narrow portion of the groove on the inner wall of the shaft cylinder. The spring is provided with elasticity to open outward by a spring.

[0006]

With the above construction, when the clip is slid forward with respect to the barrel, the writing tool holder integrated with the clip shaft moves forward in the barrel and resists the spring in the barrel. The writing portion protrudes from the distal end of the barrel, and at the same time, the locking projection on the front of the holder extends beyond the locking portion on the inner wall of the barrel, and the locking projection on the rear locks on the front end of the locking portion. At the end of writing, the engaging state due to the elasticity of the holder is released by pressing the clip, and the writing unit is retracted until the front projection is locked by the locking unit. It functions to accommodate, and a predetermined structure is possible by a simple structure. Further, when elasticity is given to the holding body by a leaf spring, the locking projection of the holding body can easily engage with the groove of the barrel, so that there is no need to particularly provide a locking portion on the inner wall of the barrel.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. (1) is a writing instrument according to the present invention, and (2) is a shaft cylinder provided with a groove (3) in the axial direction from the rear end. The groove (3) has a narrow portion (4) on the rear end side of the barrel (2) and a wide portion (5) on the front side thereof, and further has a narrow portion (4). From about the center of
With the width of the wide portion (5), a locking portion (6) is formed which is inclined rearward inside the barrel (2), and its front end constitutes a locking edge. (7) is a clip, (8) is a clip shaft that supports the clip (7), and slides by fitting into the narrow portion (4) of the barrel (2). (9) is a holder for the writing portion, which is a V-shaped cutout portion (1) opened to the rear end side.
0) is formed, and the cutout (10) imparts elasticity to the holder (9). This portion may be given elasticity by a leaf spring (11) if necessary. This leaf spring (1
Since the holding body (9) is provided with the outward elasticity by the method (1), in this case, the groove (3) of the shaft cylinder (2) can be provided without providing the locking portion (6) particularly on the inner wall of the shaft cylinder (2). The holding projection of the holding body (9) can be locked. A lid (12) is integrally formed at the rear end of the cutout (10). On the other hand, the resection (1
0) The other side is joined with the clip shaft (8),
Two projections, a rear locking projection (13) and a front locking projection (14), are provided in the side direction of the clip shaft (8). Both are inclined toward the front surface, and particularly, the rear locking projections (13)
Has a slope corresponding to the locking portion (6). The front locking projection (14) has a higher projection height than the rear locking projection (13), and is formed in a substantially trapezoidal shape. (15) is a writing portion, (16) is a spring, and (17) is a spring locking projection provided at an appropriate position of the writing portion (15).

[0008] In this manner, when the clip (7) is pressed into the groove (3), the spring (16)
And the holding body (9) are pressed, and the front locking projection (14) is engaged with the rear end of the wide portion (5) of the groove (3), that is, the front edge of the locking portion (6). At this time, the lid (12) integrated with the writing portion holder (9) covers the rearmost end of the barrel (2), and the inclined surface of the rear locking projection (13) is formed by the groove (3). (4) is in contact with the locking portion (6) provided inside the peripheral edge. Thus, the writing unit (15) is in a state of being housed in the barrel (2). When the clip (7) is further pressed forward of the barrel (2), the contact surface slides,
The rear locking projection (13) is engaged with the rear end of the wide portion (5) of the groove (3). That is, the writing section holder (9) is moved forward by the separation distance (g) by the above operation, and the writing section (15) protrudes from the barrel (2) to be in a usable state. Next, when the clip (7) is pressed toward the barrel (2) near the clip shaft (8), the rear locking projection (1) is pressed.
3) and the wide end (5) of the groove (3), the rear end of the groove (3), that is, the engagement with the front end of the locking portion (6) is released, and the spring (1) is released.
Due to the repulsive force of 6), the holding body (9) is turned into the barrel (2).
It is pressed toward the rear end and moves. However, the holder (9)
By the repulsive force of the cutout (10) of the rear, the rear locking projection (1)
When 3) comes close to the surface of the barrel (2) along the locking portion (6), the front locking projection (14), which is higher than the rear locking projection (13), becomes a locking portion. The rearward movement of the holder (9) is stopped and fixed by engaging with the front edge of (6).

[0009]

[Effect of the Invention] With the above-described configuration, the number of parts required for the writing unit retracting device can be reduced, and since the configuration is simple, the number of manufacturing steps can be greatly reduced. It has an excellent effect that the price can be reduced.

[Brief description of the drawings]

FIG. 1 is a vertical cross-sectional view of a writing instrument having a writing unit retracting device according to the present invention.

FIG. 2 is a plan view of a groove portion of the barrel.

FIG. 3 is an exploded perspective view of the clip, the holding body, and the barrel.

FIG. 4 is a cross-sectional view of the clip and the holding portion taken along line II ′ of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Writing implement 2 Shaft cylinder 3 Groove 4 Narrow part 5 Wide part 6 Locking part 7 Clip 8 Clip shaft 9 Writing part holder 10 Cutting part 11 Leaf spring 12 Lid 13 Rear locking projection 14 Front locking projection 15 Writing Part 16 Spring 17 Spring locking projection

Claims (2)

(57) [Scope of request for utility model registration] 1. A writing instrument in which a writing portion is made to protrude and retract by moving a clip in the axial direction of a barrel, wherein a groove is formed in a rear end portion of the barrel, which extends forward from an appropriate position in an axial direction. and fitting the clip axis narrow portion, the front locking the clip axis and integral fitting insert the holding member having an elastic body which slides inside the barrel, the retaining member is arranged in parallel in the axial direction to the clip axis side Form projections and rear locking projections , front
When the locking projection is higher than the rear locking projection,
A writing portion which is provided with a locking portion for engaging with the locking projection on a side of the narrow portion of the groove on the inner wall of the shaft cylinder. 2. The writing and retracting device according to claim 1, wherein a leaf spring is housed in a cutout portion of the holding body instead of the locking portion of the inner wall of the shaft cylinder which engages with the locking projection.