JPH0221275Y2 - - Google Patents

Description

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

Normally, a writing instrument cap has a clip attached to it, and many also have an inner tube fixed inside, which seals the pen body to prevent ink from evaporating and is fitted and held in the writing instrument body. Therefore, this type of cap tends to have a large number of parts and a complicated structure, but the clip has a particularly simple structure and is easy to assemble, and once assembled, it can withstand force in either direction. It is required that there is no wobbling and that it can be installed securely even if the However, it is quite difficult to satisfy these demands at the same time; products with a simple structure and easy to assemble are likely to cause looseness, and conversely, products that have a simple structure and are easy to assemble are prone to looseness, and conversely, products that need to be installed securely have a complicated structure and a large number of parts. However, there was a problem that the assembly work was complicated.

Therefore, the present invention aims to provide a cap structure for a writing instrument that has a simple structure, has a small number of parts, is easy to assemble, and does not cause rattling once assembled, and has a clip and an inner barrel. purpose. The structure is such that the base end is folded back into a groove or U-shape to form a mounting part via a stepped part, a clip with a locking window bored in the mounting part, and an inner flange in the opening at the top. The cap body has a notch for inserting the clip in the inner flange, a groove for inserting the clip is formed in the axial direction from the top, and an engaging protrusion is provided in this groove. Insert the mounting part into the notch and abut the stepped part against the inner flange, and abut the top surface of the inner cylinder inserted through the joint opening of the cap body against the inner flange. This feature is characterized in that the engaging protrusion is engaged with and fixed to the locking window in this state.

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

As shown in FIG. 3, the clip 1 is a band-shaped body whose width direction is slightly curved, and its upper base end is folded back in a U-shape to form a mounting portion 11 via a stepped portion 13. There is. Therefore, although the mounting portion 11 is also slightly curved in the lateral direction, its radius of curvature is approximately equal to that of the cap body 2. A locking window 12, which is a long hole, is bored in this mounting portion 11. The cap body 2 is made of a metal pipe, and as shown in FIG. A notch 22 for inserting a clip is provided.

Next, the middle cylinder 3 made of elastic synthetic resin has a cylindrical shape with a bottom, and serves to seal the pen body of the writing instrument and to fit and hold the writing instrument main body. As shown in the figure, a bag-shaped hole 35 is formed in the top surface 34, and the leg portion 51 of the head plug 5 is inserted into this hole 35.
is press-fitted and fixed. In this way, in this embodiment, the middle tube 3 and the head plug 5 are made into separate parts, but they may be integrally molded as one part. A groove 31 for inserting the clip extends from the top in the axial direction.
is formed, but the width and depth are different from the mounting part 1.
The width and thickness of the mounting portion 11 are equal to that of the mounting portion 11, so that no wobbling occurs when the mounting portion 11 is inserted. Further, an engaging protrusion 32 having the same size as the locking window 12 is protruded from the center of the groove 31, and this engages with the locking window 12 when the mounting portion 11 is inserted into the groove 31. A large diameter portion 36 equal to the inner diameter of the cap body 2 is formed directly below the groove 31.
Therefore, when the middle cylinder 3 is inserted into the cap body 2, no wobbling occurs in the radial direction.

The structure of the components of the writing instrument cap of the present invention is as described above, but in order to assemble it, first the mounting part 11 of the clip 1 is inserted into the notch 22 of the middle tube 2, and then The part 13 is the inner flange part 21
However, since the width of the notch 22 is equal to that of the mounting portion 11, the position of the mounting portion 11 within the cap body 2 is determined. Next, the middle cylinder 3 is inserted into the cap main body 2 through its lower abutment opening, and at this time, the groove 31 is fitted in phase with the phase of the clip. Therefore, the mounting portion 11 is attached to the groove 3.
1 , and the engagement protrusion 32 is engaged with the locking window 12 . At this time, the top surface 34 abuts against the inner flange 21, and the lower edge 12a of the locking window 12 and the lower edge 32a of the engagement protrusion 32 abut against each other. Therefore, the middle tube 3 has the inner flange 21 and the lower edge 1 of the locking window 12.
2a, and the clip 1 abuts against the lower edge 32a of the engagement protrusion 32 and the outer surface of the inner flange 21, so that the middle cylinder 3 and the clip 1 are prevented from wobbling in the axial direction. It is firmly fixed without forming.

In this way, the present invention has a simple structure with fewer components because the clip can be attached without using parts such as nuts. Furthermore, since it is only necessary to fit and insert the inner tube in phase with the clip inserted into the notch, the assembly work is simple and the attachment can be ensured. Therefore, according to the present invention, it is possible to provide a cap structure for a writing instrument having a simple structure, a small number of parts, an easy assembly operation, and a clip and an inner barrel that do not cause rattling once assembled. can do.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of an embodiment of the present invention, Fig. 2 is a perspective view of the cap body, Fig. 3 is a perspective view of the clip,
FIG. 4 shows a perspective view of the middle cylinder. DESCRIPTION OF SYMBOLS 1... Clip, 11... Mounting part, 12... Locking window, 13... Step part, 2... Cap body, 21
... Inner flange, 22 ... Notch, 3 ... Middle tube, 3
1...Groove, 32...Engaging protrusion, 34...Top surface.

Claims (1)

[Scope of utility model registration request] The proximal end is folded back into a groove or U-shape to form a stepped portion 13.
A mounting part 11 is formed through the mounting part 11.
The clip 1 has a locking window 12 formed therein, and an inner flange 21 is formed at the top opening.
A cap body 2 is provided with a notch 22 for inserting a clip, and a middle cylinder 3 is provided with a groove 31 for inserting a clip in the axial direction from the top and an engaging protrusion 32 provided in the groove 31. The mounting part 11 is inserted into the notch 22, the stepped part 13 is brought into contact with the inner flange 21, and the top surface 34 of the inner cylinder 3 inserted through the abutment opening of the cap body 2 is inserted into the inner flange. A cap structure of a writing instrument in which an engaging protrusion 32 is engaged with and fixed to a locking window 12 in a state where it is abutted with a locking window 12.