JPS6144870Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to an improvement of the fixing device for the inner sheath in a writing instrument sheath, and its purpose is to provide an easy and reliable attachment of the inner sheath to the outer sheath. be.

Conventionally, the inner sheath is attached to the outer sheath by tightening the inner sheath from the top of the outer sheath using a crown screw and a nut (Fig. 6), or by using screws on the inner sheath. There was something that had to be rotated and tightened on the top nut. The disadvantage of these methods is that the distance from the opening end of the outer sheath to the inner sheath mounting position cannot be controlled due to shrinkage when the outer sheath is made of synthetic resin, cutting errors when made of metal, etc. The problem was that it was difficult and the assembly was troublesome.

According to the present invention, these drawbacks are eliminated, and the structure is easy to manufacture and assemble, thereby ensuring reliable fitting with the writing instrument main body.

Next, embodiments will be described with reference to the drawings.

The structure of this device is an outer sheath 1, an inner sheath 2, and an elastic thin plate 3.
These are a clip 11, a screw 4, a washer 9, and a nut 10 that fasten the clip 11.
A top hole 15 for attaching the clip 11 and a side hole 16 for preventing rotation of the clip 11 are bored in the top surface 14 of the outer sheath 1. That sky hole 15
and the side hole 16, insert the clip 11,
Tighten the clip 11 using the washer 9 and nut 10 using the screw 4. In order to make the tip surface 4' of the minimum diameter stepped part of the crown screw 4 the inserting and abutting surface of the inner sheath 2, the crown screw 4 is
The minimum diameter step portion 17 is formed long. On the other hand, a flange-shaped elastic thin plate 3 having a notch 5 formed on the circumferential edge is fitted onto the outer circumferential surface 18 of the zenith portion of the inner sheath 2. The outer diameter of this peripheral edge is set to be slightly larger than the inner diameter of outer sheath 1, and the outer diameter of inner sheath 2 is set to be slightly smaller than the inner diameter of outer sheath 1. The inner sheath 2 and the elastic thin plate 3 can be fitted directly onto the outer circumferential surface 18 of the top part of the inner sheath 2, or by using a separate lid 7 with a bottom as shown in FIG. Of course, the thin plate 3' may be clamped and fixed to the inner sheath 2. With the inner sheath 2 and elastic thin plate 3 fitted, from the open end of the mouth of the outer sheath 1, with the side of the inner sheath 2 where the elastic thin plate 3 is fitted facing forward, use a pushing jig (not shown). , the upper surface 19 of the inner sheath is the tip surface 4' of the minimum diameter stepped portion of the crown screw 4.
When the inner sheath 2 is pushed in until it hits the inner sheath 2, the inner sheath 2 is fitted into the predetermined position. Further, there is no problem in making the lower surface of the nut 10 a butt limit. Therefore, when inserting the inner sheath 2, the inner sheath 2 is simply pushed straight in without rotating it. When the inner sheath 2 is fitted into a predetermined position, the elastic thin plate 3 deforms as shown in FIG. It has a shape that bites into the surface, creating a strong force against sliding friction. On the other hand, when the writing instrument body (not shown) is fitted into the inner sheath 2, a force is applied to the inner sheath 2 toward the ceiling of the outer sheath 1. The resistance against the pushing force is the clip 11
The tip surface 4' of the minimum diameter step of the top screw 4 that is tightening the
However, it has no effect on the fastening of the clip 11. Limit the pushing depth of the inner sheath 2 with the screw 4
Although the minimum diameter of the stepped part tip surface 4' is
For attaching a clip without using a clip, use the clip fixing piece 2 that fixes the clip as shown in Fig.
1 lower side 12 or lower side 13 of the clip
You can also limit the depth by pushing until it hits the .

The inner sheath 2 fitted in a predetermined position serves to prevent the pen tip of the writing instrument body (not shown) from drying out, and to fit and lock the writing instrument body to the inner sheath. The shape of the elastic thin plate 3 may be formed into a flange shape and a notch 5 is made in the peripheral edge 22 thereof, or the elastic thin plate 3 may be formed as a thin elastic plate (as shown in FIG. 4) and a notch may be made in the V-shape 5' to expose an edge 24. However, the circumferential surface 6' may be left.

With the above structure, by fitting the elastic thin plate 3 to the outer circumferential surface 18 of the zenith part of the inner sheath 2 and pushing the inner sheath 2 to a predetermined position from the open end of the outer sheath 1,
Due to the elasticity of the elastic thin plate 3 fitted to the inner sheath 2, it can be strongly fitted to the inner circumferential surface of the outer sheath 1.

Therefore, it is possible to achieve the intended purpose.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view of the inner sheath attached, Fig. 2 is an exploded perspective view of the same, Fig. 3 is a longitudinal sectional view of the inner sheath and thin plate integrated into one body using a separate lid with a bottom. Fig. 4 is a perspective view showing an embodiment of the elastic thin plate, Fig. 5 is a vertical cross-sectional view showing the abutting depth limit of the inner sheath using a clip fixing piece, and Fig. 6 is a longitudinal cross-sectional view showing the state in which the inner sheath is installed in the vertical direction. Surface diagram. 1... Outer sheath, 2... Inner sheath, 3... Elastic thin plate,
3'... Flat elastic thin plate, 301... Elastic deformation part, 4... Ceiling screw, 4'... Minimum diameter step part tip surface,
5...Circular notch, 5'...V-shaped notch, 6,
6'... Circumferential surface, 7... Separate bottomed lid body, 8... Latching protrusion, 9... Washer, 10... Nut,
11...Clip, 12...Lower surface of clip fixing piece, 13...Lower surface of clip foot, 14...Top surface of outer sheath, 15...Top hole, 16...Side hole, 17...
...Minimum diameter stepped portion of crown screw, 18...Top outer circumferential surface of inner sheath, 19...Top surface of inner sheath, 20...Inner circumferential surface of outer sheath,
21... Clip fixing piece, 22... Peripheral edge of elastic thin plate, 24... Edge of elastic thin plate.

Claims (1)

[Scope of utility model registration request] Inside the outer sheath 1, a thin plate 3 having an outer diameter slightly larger than the inner diameter of the outer sheath and having elasticity is directly fitted to the inner sheath 2, or the inner sheath 2 and the thin plate 3 are combined with a separate lid with a bottom. The inner sheath 2 is fitted into the outer sheath 1 in a state where the body 7 is integrated into one body, and the inner sheath 2 is fitted into a predetermined position within the outer sheath 1 due to the elastic deformation of the thin plate 3 during the insertion. A device for fixing an inner sheath 2 in a sheath for a writing instrument.