JPH0444393Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a writing instrument clip attachment device.

More specifically, the present invention relates to a writing instrument clip attachment device that securely and easily fixes the clip to the cap or barrel of the writing instrument.

BACKGROUND OF THE INVENTION Various proposals have been made for structures for attaching plate-shaped clips to caps.

They have a structure in which the clip leg part is press-fitted into the cap of the crown member to clamp and fix it (for example, Japanese Utility Model Application No. 56-83080, Japanese Utility Model Application No. 57-39283).
Publications, etc. ), or a structure in which it is fixed with screws.

Problems to be Solved by the Present Invention In the structure in which the clip is fixed by press-fitting the crown member, dimensional accuracy of each assembled part is required, and depending on the degree of variation, the clip may rattle, fall off, or Alternatively, the press-fitted portion of the cap may bulge in the outer circumferential direction, resulting in a poor yield of parts and products.

Further, assembly requires a large amount of force, and a press machine or the like is required.

On the other hand, in a structure in which the parts are fixed by screws, the screws tend to loosen over time or due to external force, which tends to cause various defects.

The present invention attempts to solve the above-mentioned conventional problems.

Means and Effects for Solving the Problems The present invention will be described in detail below with reference to embodiments shown in the accompanying drawings.

As is clear from FIG. 1, the present invention consists of the following parts: a cap or barrel 1, a crown member 2, a clip 3, a crimp ring 4, and a nut 5.

1 is a cap or barrel made of metal such as stainless steel, aluminum, brass, etc.
A pipe-shaped opening 11 is formed at one end, and a portion of the opening 11 has a clip-fitting notch 12.

Reference numeral 2 denotes a crown member, and a male threaded portion 21 that engages with the nut 5 is formed at the lower part.

3 is a plate-shaped clip made of metal or resin;
A mounting plate 32 bent at a substantially right angle is provided on the upper part, and a mounting hole 31 is formed in the mounting plate, into which the male threaded portion 21 of the crown member 2 is inserted.

4 is a crimp ring, inside which the crown member 2 is attached.
A hole 42 through which the male threaded portion 21 of the hole 42 is inserted, and a female tapered portion 41 are formed at the bottom of the hole 42, and there are one or more female tapered portions 41 (four in this embodiment).
It is divided by a slit 43.

Furthermore, a groove 44 may be formed on the outer periphery in order to make the female taper part 41 flexible.

Reference numeral 5 designates a nut, on the inside of which a female threaded portion 51 that engages with the male threaded portion 21 of the crown member 2 is formed; A groove 52 is formed on the bottom surface for rotation with a screwdriver or the like.

From the opening 11 of the cap or barrel 1, insert the male screw part 21 of the crown member 2 into the holes 31 and 42 of the clip 3 and the crimp ring 4, and then tighten the nut 5.
After slightly screwing the nut 5 into the female screw part 51 of the screwdriver and inserting each locked member and positioning the clip 3 and the crown member 2, the nut 5 is rotated using a screwdriver or the like using the groove 52. By tightening, the male tapered portion 53 of the nut 5 enters the female tapered portion 41 of the crimp ring 4.

As a result, the crimp ring 4 is pushed outward in the outer circumferential direction and comes into pressure contact with the inside of the cap or barrel, completing the fixation of the clip.

Effects of the invention Since the invention is constructed in this way, the dimensional accuracy of each part, such as the inner diameter of the cap or barrel, and the outer diameter of the crimp ring, may vary by about 1/10 mm. Since the clip fixing function can be maintained sufficiently, and the angles of the male and female taper parts do not require relatively high precision, the yield of parts and finished products can be improved, and assembly can be done with only a screwdriver. Yes, by setting the tightening torque with an electric screwdriver arm and performing assembly work, there will be no problem with the cap expanding outwards due to over-tightening.

Furthermore, since force is constantly applied to the screw part due to the reaction force at the tapered part, there is no need for an adhesive to prevent the screw from loosening.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of an embodiment of the present invention, FIG. 2 is an assembly diagram, and FIG. 3 is a longitudinal sectional view of another embodiment. 1... Cap or barrel, 11... Opening, 1
2... Clip insertion notch, 2... Crown member, 2
1...Male thread part, 3...Clip, 31...Mounting hole, 32...Mounting plate, 4...Crimp ring, 41...
...Female tapered portion, 42...hole, 43...slit, 44...groove, 5...nut, 51...female threaded portion, 52...groove, 53...male taper portion.

Claims (1)

[Scope of utility model registration request] For the metal cap or barrel of a writing instrument,
In the structure for attaching a plate-shaped clip made of metal or resin, one end of the cap or barrel 1 is a pipe-shaped opening 11, and the male threaded part 21 of the crown member 2 is attached to the opening 11 side of the clip 3. A male taper whose outer side has the same angle as the tapered shape of the crimp ring 4 is inserted into the mounting hole 31 of the crimping ring 4 and the hole 42 of the crimp ring 4 which has a female taper part 41 divided by one or more slits 43 on the inside. A clip attachment device for a writing instrument that fixes a clip 3 by screwing onto a nut 5 having a female screw portion 51 on the inside that engages with a male screw portion 21 of a crown member 2.