JP3394397B2 - Clip mounting structure for writing implement - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clip mounting structure for a writing instrument. 2. Description of the Related Art A writing instrument clip is an important part for a writing instrument in terms of both its function and appearance, but it has a simple mounting structure and can be securely attached without rattling. Requested. However, these two requirements have conflicting properties, and it is very difficult to completely satisfy both. FIG. 4 shows an example of a simple clip mounting structure which does not require an auxiliary part for clip mounting and has a simple structure, and is widely used. The clip 2 having such a clip mounting structure is formed of a metal plate having a high elasticity. As shown in FIG. 5, a box-shaped mounting portion 22 is formed at the tail end side, and a pressure contact is made from the mounting portion 22 to the distal end side. A piece 23 extends. Further, a step portion 24 is formed on the tail end side of the mounting portion 22. Therefore, a portion of the mounting portion 22 below the step portion 24 is a portion to be inserted into the square hole 11 of the shaft body 1. [0004] Thus, the mounting portion 22 of the clip 2 is provided.
6 is inserted into the square hole 11 of the shaft 1 as shown in FIG. 6, but at this time, the ball 2 at the tip of the clip 2 is pressed against the surface of the shaft 1 and the clip 2 is inserted in a warped state. You. When the insertion is completed, as shown in FIG.
Abuts against the edge of the square hole 11, and the pressure contact piece 23 presses against the inner surface of the shaft 1. At the same time, the pressing edge 25 following the step portion 24 and the spherical portion 21 at the tip are pressed against the surface of the shaft 1. In other words, the three points of the pressing edge 25, the ball 21 and the pressing piece 23 of the clip 2 are pressed against the front and back of the shaft 1, and the step 2
Since the clip 2 is held by contacting the edge of the square hole 11 with the 4, there is an advantage that an auxiliary part for attaching the clip is not required and the structure is extremely simple. However, in such a clip mounting structure, if the step 24 of the clip 2 is small, the step 24 and the edge of the square hole 11 are not easily caught, and
Since the clip 2 may come off, the step portion 24 needs to be enlarged to some extent. On the other hand, when the step portion 24 is enlarged, the portion of the mounting portion 22 inserted into the square hole 11 of the shaft body 1 becomes large. Therefore, it is necessary to largely warp the clip 2 in the mounting process shown in FIG. Therefore,
The attachment operation is very difficult, and the greatly warped clip 2 may be deformed. When the shaft 1 is made of a synthetic resin, the wall thickness is large. In this case, too, the portion of the mounting portion 22 of the clip 2 inserted into the square hole 11 of the shaft 1 becomes large. Problem arises. Therefore, there is a problem that the shaft body 1 having such a clip mounting structure is limited to a metal having a small thickness.
Further, since the tail end surface 26 of the clip 2 comes into contact with the peripheral surface of the shaft 1, a step of processing the edge of the tail end surface 26 into a shape along the peripheral surface of the shaft 1 is required. End face 2
A slight gap is formed between the peripheral edge of the shaft body 1 and the edge of the shaft 6, which is not preferable in appearance. Therefore, the present invention provides a clip mounting structure for a writing instrument which has a simple mounting structure, can be securely mounted, can be easily mounted, and can be applied to a shaft made of synthetic resin. The purpose is to provide. [0008] In order to achieve the above object, a clip mounting structure for a writing instrument according to the present invention has a notch formed at the opening edge of the tail end and a square hole formed near the tail end. With the shaft body, having a spherical portion at the tip pressed against the surface of the shaft body, having a box-shaped mounting portion inserted into the square hole on the tail end side,
A clip that extends from the mounting portion toward the distal end and presses against the inner surface of the shaft, and a clip formed with a locking piece fitted into the notch at the tail end; and a notch that is fitted into the tail end opening of the shaft. And a cap to fix the locking piece fitted into the part. Embodiments of the present invention will be specifically described below with reference to the drawings. The clip 2 is formed of a metal plate. As shown in FIG. 1, a box-shaped mounting portion 22 is formed at the tail end of the clip 2, and a press-contacting piece 23 extends from the mounting portion 22 to the distal end. A locking piece 27 is continuously provided in the radial direction from the tail end face 26, and an edge between the locking piece 27 and the mounting portion 22 is a press contact edge 25. A ball 21 is formed at the tip of the clip 2 as shown in FIG. The shaft 1 is, for example, a shaft cylinder of a knock-type writing instrument, and may be made of metal or synthetic resin. As shown in FIG. 2, a clip 2
The notch 12 having the same size as the locking piece 27 is formed. In the vicinity of the tail end of the shaft body 1, a square hole 11 into which the mounting portion 22 of the clip 2 is inserted is formed. The width of the square hole 11 is equal to the width of the mounting part 22, and it is necessary to prevent a gap when the mounting part 22 is inserted into the square hole 11. 2
The length may be larger than the length from the tail end of No. 2 to the tip of the pressure contact piece 23, so long as the pressure contact piece 23 presses against the inner surface of the shaft body 1 when the locking piece 27 is fitted into the notch 12. . Although the mounting portion 22 is inserted into the square hole 11, the width of the square hole 11 in the axial direction is larger than the length from the tail end of the mounting portion 22 to the tip of the pressure contact piece 23, so that the mounting can be easily performed. . At this time, before the pressure contact piece 23 completely enters the shaft 1, the spherical portion 21 and the pressure contact edge 25 come into contact with the surface of the shaft 1. Therefore, the clip 2 is pressed and slightly warped by the fingertip, and the pressing piece 23 is completely inserted into the shaft 1 with the ball portion 21 and the pressing edge 25 pressed against the surface of the shaft 1. Then, in this state, the clip 2 is moved to the distal end side, the locking piece 27 is fitted into the notch 12, and the pressing piece 23 is attached to the shaft 1.
Is pressed against the inner surface of And then, as shown in FIG.
Press the crown 3 having the flange 31 into the opening at the tail end of the shaft 1,
The retaining piece 27 is pressed by the flange portion 31 so that the clip 2 does not move in the axial direction. As described above, the mounting operation of the clip 2 is very simple, but the locking piece 2 fitted into the notch 12 is provided.
7 is pressed by the flange 31 of the crown 3, so that the clip 2 does not move in the axial direction, and the rectangular hole 1 has the same width.
Since the mounting portion 22 is inserted into the first member 1, it does not move in the lateral direction. Then, the ball portion 21, the press contact edge 25 and the press contact piece 2
Since the three points 3 are pressed against the shaft body 1, it functions as a clip and does not rattle back and forth, left and right, and although the cap 3 is required as an auxiliary part, it can be securely attached with a simple structure. . Further, although it can be easily assembled regardless of the thickness of the shaft body 1, the locking piece 27 is notched.
2, the step of processing the edge of the tail end surface 26 equally to the peripheral surface of the shaft body 1 as in the conventional example is unnecessary, and the edge of the tail end surface 26 and the peripheral surface of the shaft body 1 are unnecessary. There is no gap between them. As described above, the clip mounting structure for a writing instrument according to the present invention is characterized in that a notch is formed at the opening edge of the tail end and a square body is formed near the tail end. It has a ball portion at the tip that presses against the surface of the shaft, and has a box-shaped mounting portion that is inserted into the square hole at the tail end, and extends from the mounting portion to the tip and presses against the inner surface of the shaft. Consisting of a clip formed on one end and a tail end with a locking piece fitted into the notch, and a cap fitted on the tail end opening of the shaft body and fixing the locking piece fitted into the notch. Therefore, a clip attachment structure for a writing instrument that has a simple attachment structure, can be securely attached, can be easily attached, and can be applied to a shaft made of synthetic resin.

[Brief description of the drawings] FIG. 1 is a perspective view of a clip of the present invention. FIG. 2 is a front view of the shaft of the present invention. FIG. 3 is a sectional view of an embodiment of the present invention. FIG. 4 is an explanatory diagram of a conventional example. FIG. 5 is a perspective view of a conventional clip. FIG. 6 is an explanatory view of an assembling process of a conventional example. [Explanation of symbols] 1 shaft 11 Shaft hole 12 Notch of shaft 2 clips 21 sphere 22 Mounting part 23 Pressure contact piece 24 steps 25 crimping edge 26 tail end 27 Locking piece 3 caps 31 Tsubabe

Claims (1)

(57) [Claims 1] A shaft body having a notch formed at the opening edge of the tail end and a square hole formed near the tail end, and a sphere pressed against the surface of the shaft body at the tip. And a box-shaped mounting portion to be inserted into the square hole on the tail end side, a pressing piece extending from the mounting portion to the front end side and pressing against the inner surface of the shaft body, and the notch on the tail end. A clip formed with a locking piece to be fitted into the portion, and a cap that is fitted to the tail end opening of the shaft body and fixes the locking piece fitted into the notch. Clip mounting structure for writing utensils.