JPS6334950Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to an improved clip attachment device for a writing instrument, and its purpose is to attach the inner diameter of the barrel and the coaxial hole of the horizontal part of the clip that overlaps the upper end surface of the barrel. Also, one side of the fixed pipe expands into a flap shape, and the other side forms an annular bulge, and this bulge is firmly fitted into the inner periphery of the shaft cylinder, thereby fixing the clip and the shaft cylinder. The main feature is that it prevents movement and can be firmly fixed with a simple structure.

Below, to explain the drawings, 1 is a shaft cylinder, 2 is
is a clip, the clip 2 has a horizontal portion 2a formed by bending the upper part at right angles in one direction, and a mounting hole 2b is formed in the center of the horizontal portion 2a with approximately the same diameter as the center hole 1a of the shaft cylinder portion 1; It is fixed with a fixed pipe 3, and the fixed pipe 3 has one end formed with a flap-shaped part 4 whose diameter gradually increases, and the flap-shaped part 4 is connected to the mounting hole 2b of the clip 2.
A fitting portion 4a having a diameter slightly larger than the diameter of the flange-shaped portion 4 can be formed, and the opening edge of the flange-shaped portion 4 forms a flange 5 that is curled downward, that is, the flange-shaped portion 4 is expanded as shown in FIG. The fitting part 4a extending from the open base end 4b to the other end opening has a smaller diameter than the center hole 1a of the shaft tube 1,
It is formed to have a gap 6 between it and the inner surface of the center hole 1a, and the mounting hole 2b of the clip 2 is slightly expanded by the expansion flap-shaped part 4 near the collar 5 and fixed. or,
The center hole 1a of the shaft cylinder 1 is biased toward the lower side of the cylinder part 5.
The fixed pipe 3 has a bulging portion 7 that presses against the inner circumferential surface of the fixed pipe 3.The same effect can be obtained even if protruding portions are formed at regular intervals instead of the annular bulging portion 7.
The mounting hole 2b of the clip 2 is overlapped with the upper end of the shaft tube 1, and then inserted from the cylindrical portion 5, received by the fitting portion 4a of the flap-shaped portion 4, and the clip 2 is inserted into the mounting hole 2b of the clip 2.
b is slightly enlarged, and the bulging portion 7 is forcefully and frictionally press-fitted into the inner circumferential surface of the center hole 1a of the shaft tube 1 to fix it. That is, the flap-like portion 4 of the fixed pipe 3 As it is forcibly press-fitted into the mounting hole 2b,
The maximum diameter portion near the flange 5 comes into contact with the surface of the mounting hole 2b as elastically as possible to prevent rotation of the clip 2, and at the final stage of press-fitting, the horizontal portion 2a of the clip 2
is clamped and fixed between the collar 5 and the upper end surface of the barrel. In addition, after applying an appropriate adhesive to the surface of the center hole 1a of the shaft tube 1,
The fixed pipe 3 is fitted, and the collar 5 may be bent horizontally instead of being curled. Although the drawing shows the case where it is attached to the shaft cylinder 1, it can also be attached to the cap in the same way.

As described above, the present invention provides a flange-shaped part that widens toward the outer end on the opening side of one end of the fixed pipe, and a flange by bending the opening edge downward, and a shank tube below the cylindrical part of the other end. Providing a bulge that can be pressed against the center hole of the
This fixed pipe is forcibly press-fitted into the center hole of the shaft cylinder and the mounting hole of the clip mounted and connected to the upper end of the shaft cylinder, so when the fixed pipe finishes press-fitting into the clip mounting hole, it is fitted with maximum force and the mounting hole is fixed. This prevents the clip from rotating without creating a gap between the clip and the shaft, allowing for a robust installation.The bulge also presses strongly against the inner circumferential surface of the center hole of the shaft tube, making the clip and shaft tube strong. It is easy to install, has a simple configuration, and can be provided at low cost.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of the main part, and FIG. 2 is a longitudinal sectional view of the fixed pipe. DESCRIPTION OF SYMBOLS 1... Shaft tube, 2... Clip, 3... Fixed pipe, 4... Rapper-shaped part, 5... Tsuba, 7... Annular bulging part.

Claims (1)

[Scope of utility model registration request] A flange-like part 4 is formed by gradually enlarging one end of a fixed pipe 3 for fixing a clip 2 to the upper end surface of the shaft cylindrical part 1, and a flange 5 is formed by curving the upper end edge downward. A bulging part 7 which is biased downward and bulges out in an annular shape is provided on the same body, and the mounting hole 2b of the mounting part 2a of the clip 2 is overlapped with the upper end of the shaft tube 1, so that the fixed pipe 3 is A clip attachment device for a writing instrument, in which an annular protrusion 7 of a cylindrical portion 5 is frictionally inserted into the inner circumferential surface of a barrel 1, and a horizontal portion 2a of a clip 2 is fixed by pressure with a flange 5.