JPH0116636Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a clip attachment structure for a writing instrument.

Many structures for attaching a clip to the barrel or cap of a writing instrument have been proposed and put into practical use, but the structure for attaching a clip is simple;
At the same time, it is required to be installed reliably, and it is quite difficult to achieve both of these requirements. Particularly in the case of mass-produced, low-priced writing instruments, there is a strong need to improve the yield of clip materials.

By the way, as shown in FIG. 1, one of the devices that has a simple structure and can be installed reliably is a clip 1 with a locking cut 2 provided in the axial direction in the mounting portion 11 of the clip 1, which is formed by an annular groove in the tail plug. small diameter portion 32
is engaged with this locking notch 2, and this tail plug is inserted into the shaft cylinder 4.
However, with this structure, when the clip 1 is pulled, the arcuate edge 1 of the attachment part 11 cannot be pulled out.
This is because 1a is in contact with the inner circumferential surface of the shaft cylinder 4 and the like. Therefore, since the clip 1 requires an arcuate portion, there is a problem in that the yield of the material when manufacturing the clip 1 is low.

Therefore, the object of the present invention is to provide a writing instrument clip mounting structure that has a simple structure, can be mounted reliably, and can improve the material yield when manufacturing the clip. A locking notch is provided in the mounting portion of the clip, which is formed by bending a band-shaped plate material at right angles, from the side of the axis of the clip, and the small diameter portion formed by the annular groove of the tail plug is connected to the locking notch. The tail plug is fixed to the barrel or cap by engaging the clip with the clip attachment notch provided on the edge of the barrel or the cap, and the corner of the attachment part of the clip is attached to the barrel or the cap. It is characterized by being in contact with the inner peripheral surface of the cap.

The present invention will be specifically described below based on embodiments shown in the drawings.

As shown in FIG. 2, the clip 1 is made by punching out a plate into a belt shape, and the upper part thereof is bent at a right angle to form a mounting part 11. This mounting part 1
1 is provided with a locking notch 2 in a direction perpendicular to the axis of the clip 1, and the inner part of this locking notch 2 is semicircular, and its center is located on the axis. . The tail plug 3 is provided with an annular groove 31,
The outer diameter of the small diameter portion 32 formed by the annular groove 31 is equal to the semicircular inner diameter of the locking notch 2 . A clip attachment notch 41 having dimensions equal to the width and plate thickness of the attachment portion 11 is provided at the end edge of the shaft tube (or cap) 4.

After the small diameter portion 32 of the tail plug 3 is engaged with the locking notch 2, the attachment portion 11 of the clip 1 is engaged with the clip attachment notch 41, and the tail plug 3 is attached to the shaft tube 4.
The installation is completed by press-fitting or gluing it to the rear end. At this time, the corner portion 11b of the attachment portion 11 of the clip 1 is in contact with the inner circumferential surface of the shaft cylinder 4, as shown in FIG. Therefore, even if a force is applied to the clip 1 in either direction, it will not come off. In addition, a notch 4 for attaching the clip is provided to the attaching portion 11.
1, if a rotational force as shown by the arrow in FIG. 6 acts on the clip 1, it will try to rotate about the fulcrum A, but
Since the corner portion 11b is in contact with the inner circumferential surface of the shaft cylinder 4, almost no wobbling occurs. Furthermore, the seventh
As shown in the figure, the notch direction of the locking notch 2 may be made oblique and largely deviated from the tangential direction of the circumference centered on the fulcrum A. Also in this case, the attachment portion 11
The corner portion 11b is brought into contact with the inner circumferential surface of the shaft cylinder 4.

As explained above, according to the present invention, it is possible to attach the clip reliably with a simple structure, there is no need for an arcuate part with a diameter larger than the width of the clip, and the plate material can be punched out and formed into a belt shape. This simplifies the production of the clip and significantly improves the yield of material.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of the conventional example, Fig. 2 is a perspective view of the clip, Fig. 3 is a perspective view of the tail plug, Fig. 4 is a perspective view of the barrel, Fig. 5 is a sectional view, and Fig. 6 is a perspective view of the clip. Figure 5-
A cross-sectional view along the line, FIG. 7, is an explanatory view of another embodiment. 1... Clip, 2... Locking notch, 3...
Tail plug, 4...Shaft tube (cap), 11...Mounting part,
31... Annular groove, 32... Small diameter portion, 41... Notch for clip attachment.

Claims (1)

[Scope of utility model registration request] A locking notch is provided in the mounting portion of the clip, which is formed by bending a band-shaped plate material at right angles, from the side of the axis of the clip, and the small diameter portion formed by the annular groove of the tail plug is connected to the locking notch. The tail plug is fixed to the barrel or cap by engaging the clip with the clip attachment notch provided on the edge of the barrel or the cap, and the corner of the attachment part of the clip is attached to the barrel or the cap. A writing instrument clip mounting structure characterized in that the clip is brought into contact with the inner circumferential surface of a writing instrument or a cap.