JPH0219277Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a cap for a writing instrument to which a clip or the like can be easily attached.

Conventionally, the method of attaching clips, etc. to the cap body was to clamp and fix each part by screwing a nut inside the inner cylinder onto the male screw of the head plug that was inserted through the hole in the cap body, clip, and inner cylinder. , or
In some cases, the male threads of the stopper inserted through the holes in the cap body and the clip were screwed into the female threads provided in the inner cylinder, thereby clamping and fixing each part.

However, the former method is not easy to assemble because it involves tightening nuts at the bottom of a long and narrow cylinder, while the latter method is easy to assemble, but the screws may loosen or rattle after repeated use. Both caps were inadequate as caps for low-cost writing instruments, and assembly was difficult to automate.

The present invention improves these drawbacks and provides a cap that is easy to assemble, does not loosen or come off, and can securely fix each component. In other words, the cap body has a notch at one end and an annular protrusion inward, a clip has a hollow space inside the mounting part, and a small diameter part protruding from the bottom has a protruding or concave shape in the radial direction. An annular projecting piece consisting of an inner cylinder provided with a formed engaging part, and a head plug having a head and a shaft part, and an engaging part provided on the shaft part that can be engaged with the engaging part of the inner cylinder. The clip engaged with the notch and the inner cylinder are brought into contact with each other on both sides of the
Press the head of the head plug against the top of the clip attachment part,
This is a cap for a writing instrument in which the engaging part of the head plug is engaged with the engaging part of the inner cylinder within the cavity of the clip, and the clip and the annular protrusion are clamped and fixed between the head plug and the inner cylinder.

The feature of the present invention is that the upper surface of the clip that is engaged with the notch in the cap body is directly pressed by the head of the head plug, and the uneven engagement portions of the head plug and the inner cylinder are brought together within the cavity of the clip. The structure is such that the cap body and clip are fixed by the head plug and inner cylinder. Therefore, the structure of each part has become simple, and assembly is as simple as stacking them in the axial direction and pressing them together, making it possible to securely attach each part without wobbling or coming off.

In the present invention, the respective engaging portions of the head plug and the inner cylinder may be a combination of a concave shape and a protrusion shape, either in a forward or reverse direction.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

In the embodiment shown in FIGS. 1 and 2, a cap body 1 made of a cylinder made of synthetic resin has an inward annular protrusion 2 at one end, and a side part slightly larger than the attachment part 4 of the clip 3. A notch 5 is provided with a width that reaches the annular projection piece 2 from one end.

The clip 3 made of synthetic resin has a mounting portion 4 bent at right angles, and the mounting portion 4 can be inserted into the notch 5 and the cap body 1, and has a length that is the same as or slightly longer than the notch 5. Thick leg portion 6
A space 7 is provided in the leg portion 6.

The inner cylinder 8 made of elastic synthetic resin is inserted from the other end of the cap main body 1, and the bottom surface is inserted into the annular protrusion 2.
It is formed so that it can be fitted into the cap body 1 in this state, and a rod-shaped small diameter part 9 is provided on the outer bottom surface to protrude along the axis, and the small diameter part has an engaging part that projects in the radial direction. 10 is provided protrudingly in an annular shape.

The head plug 11 made of elastic synthetic resin consists of a head 12 having the same outer diameter as the cap body 1 and a shaft 13 that can be inserted into the cavity 7.The shaft 13 is provided with a shaft hole 14. , the shaft hole 14 has the engaging portion 1 of the inner cylinder 8.
A radial concave engaging portion 15 that can be engaged with
It is arranged in a ring.

To assemble the cap, insert the attachment part 4 of the clip 3 into one end of the cap body 1 while engaging the notch 5 so that it comes into contact with one side of the annular protrusion 2, and at the same time The inner cylinder 8 is inserted from the end and fitted with the bottom surface of the inner cylinder 8 in contact with the other surface of the annular protrusion 2.

Next, attach the head plug 11 to the top surface of the attachment part 4 of the clip 3.
When the engaging part 10 of the inner cylinder 8 is inserted into the shaft hole 14 of the head stopper 11 while being placed and pressed while deforming the engaging part 10 of the inner cylinder 8, the protruding engaging part 10 and the concave engaging part 10 are inserted. The engaging portion 15 of the clip 3 engages within the cavity 7 of the clip 3. At this time, the head plug 11 and the inner cylinder 8 firmly sandwich and fix the attachment part 4 of the clip 3 and the annular protrusion 2 of the cap body 1.

In this way, the attachment part 4 of the clip 3 and the annular protrusion 2 of the cap body 1 are sandwiched between the head plug 11 and the inner cylinder 8, and all parts are securely fixed.

In the embodiments shown in FIGS. 3 and 4, the legs 6 of the clip 3 are shaped like ring-shaped glasses, and the head plug 1
1, the engaging part 15 of the inner cylinder 8 is convex, and the engaging part 10 of the inner cylinder 8 is concave. This is the same as the previous embodiment.

The engaging portions may be annular or intermittent, and the elasticity of the engaging portions may be the elasticity of the material itself, or may be made deformable by providing elasticity by providing slits.

In the present invention, as described above, the upper surface of the clip inserted from one end of the cap body is pressed directly with the head plug, and the head plug and the inner cylinder are engaged, thereby sandwiching the annular protrusion of the cap body and the clip. Since it is attached and fixed, the structure is simple, and assembly can be automated by simply stacking them in the axial direction and pressing them together.It also allows for reliable fixation without the risk of loosening or coming off even after repeated use. Summer. Furthermore, since the head plug and the inner cylinder can be engaged within the attachment portion of the clip, the number of parts can be reduced, and short caps can also be formed.

Therefore, the present invention has become optimal as a cap for use in low-cost writing instruments.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional view showing an embodiment of the present invention, Fig. 2 is a cross-sectional view taken along the - line in Fig. 1, Fig. 3 is a longitudinal sectional view showing another embodiment, and Fig. 4 is a longitudinal sectional view of Fig. 3. - line cross-sectional view. DESCRIPTION OF SYMBOLS 1... Cap body, 2... Annular projection piece, 3... Clip, 4... Mounting part, 5... Notch, 7... Hole, 8... Inner cylinder, 9... Small diameter part, 10... Engaging part of inner cylinder, 11 ... head plug, 12 ... head, 13 ... shaft part, 15 ... engagement part of head plug.

Claims (1)

[Scope of utility model registration request] A cap body 1 having a notch 5 and an inward annular protrusion 2 at one end, a clip 3 having a cavity 7 inside the mounting part 4, and a small diameter part 9 protruding from the bottom surface.
It has an inner cylinder 8 provided with an engaging part 10 formed in a protruding or concave shape in the radial direction, a head 12 and a shaft part 13, and the shaft part 13 engages with the engaging part 10 of the inner cylinder 8. It consists of a head plug 11 provided with a possible engagement part 15, and the clip 3 engaged in the notch 5 and the inner cylinder 8 are brought into contact with both sides of the annular projection piece 2, and the upper surface of the attachment part 4 of the clip 3 is brought into contact with the inner cylinder 8. Press the head 12 of the head plug 11 to engage the engaging portion 15 of the head plug 11 with the engaging portion 10 of the inner cylinder 8 within the cavity 7 of the clip 3, thereby connecting the head plug 11 and the inner cylinder. A cap of a writing instrument in which a clip 3 and an annular protrusion 2 are clamped and fixed at 8.