JPH063684U - Caps for writing instruments - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide a cap such as a writing instrument which has a complete sealing function of a middle cap, can be securely click-fitted, and can be easily attached and detached. [Structure] An outer cap is provided with an inner cap into which a tip of a writing instrument or the like is inserted, and an axial slit is formed in a part of a peripheral wall of the inner cap near an opening edge of the inner cap to provide a tip shaft portion of the writing instrument or the like. A click-fitting portion that engages with the outer surface is provided, and a seal-fitting portion that airtightly fits with the outer surface of the tip shaft portion of a writing instrument, etc. at a position deeper than the click-fitting portion in the middle cap is used as the click-fitting portion. Are separately provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a cap for a writing instrument or the like having an inner cap into which the tip shaft portion of the writing instrument or the like is inserted inside an outer cap.

[0002]

[Prior art]

 In this type of cap, it is particularly required that the middle cap has a complete sealing function. By the way, in order to confirm whether the middle cap is completely fitted, it is better to click-fit the middle cap. However, if a ridge or the like for engaging is provided and click-fitted, it becomes difficult to attach and detach the middle cap.Therefore, in general, a slit is provided in the middle cap to facilitate elastic deformation of the middle cap. Often. However, providing the slit in the middle cap may impair the sealing function of the middle cap. In order to solve this problem, for example, as disclosed in Japanese Utility Model Publication No. 4-15511, the range of the slit provided in the middle cap is limited, that is, from the opening edge of the middle cap to the engaging portion such as a ridge. A cap has been proposed in which the slit is limited to a range that does not exceed the engagement part to the vicinity.

[0003]

[Problems to be solved by the device]

 If the range of the slit is limited from the opening edge of the middle cap to the vicinity of the click-fitting engaging portion as in the above-mentioned known example, it becomes difficult to determine the position of the end of the slit and the engagement of the middle cap. When the position of the engaging part is set very close to the opening edge, it is difficult to provide a slit, and even though the engaging part is thick due to ridges, etc., there is a slit at the position of the engaging part. Since it is not provided, elastic deformation of the engaging portion is suppressed, and there is a problem that the attachment and detachment of the middle cap is not so easy. Therefore, the present invention provides a cap for writing implements, etc., which has a complete sealing function for the middle cap, can be securely click-fitted, and can easily attach and detach the middle cap. With the goal.

[0004]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the cap of the writing instrument or the like of the present invention is provided with an inner cap into which the tip of the writing instrument or the like is inserted in the inner portion of the outer cap, and one of the peripheral walls of the inner cap near the opening edge. In addition to providing a click-fitting part that has an axial slit in the part and engages with the outer surface of the tip shaft part of a writing instrument, etc., the tip shaft part of the writing instrument, etc. It is characterized in that a seal fitting portion that is airtightly fitted to the outer surface is provided separately from the click fitting portion.

By providing the seal fitting portion on the middle cap separately from the click fitting portion, the seal fitting portion is not affected by the structure of the click fitting portion and the seal function is provided. It can be achieved completely, and the click-fitting part is not affected by the structure of the seal-fitting part, and the slits can be freely provided without restriction, so that click-fitting can be ensured and The cap can be easily attached and detached.

[0006]

【Example】

 Hereinafter, embodiments will be described in detail with reference to the drawings. First, FIGS. 1 and 2 show a first embodiment. The cap 1 is attached to and detached from a writing instrument 2 such as a marker. The cap 1 is made of resin and has an outer cap 3 and an inner cap 4 integrally formed therein, and a click fitting portion 5 is provided at a position near the opening edge of the inner cap 4 and a click fit is performed. The seal fitting portion 6 is provided at a position deeper than the joint portion 5 separately from the click fitting portion 5, and the projection 7 extending in the circumferential direction is provided on the inner surface of the click fitting portion 5 and the click fitting portion 5 is provided. An axial slit 8 is provided at a required position on the circumference of the joint 5 in a range beyond the position of the protrusion 7 from the opening edge. Further, the click fitting portion 5 has a larger inner diameter and a slightly smaller thickness than the seal fitting portion 6. The writing instrument 2 has a thin shaft portion whose outer diameter changes in three steps at the tip of the shaft, and the cap 1 is attached to this thin shaft portion. Then, the thin shaft portions of the first and second stages are inserted into the middle cap 4, the thin shaft portion 9 of the first stage and the seal fitting portion 6 of the middle cap 4 are air-tightly fitted, and the second stage The circumferential groove 11 provided on the outer surface of the fine shaft portion 10 of the eye is engaged with the ridge 7 of the click fitting portion 5 of the middle cap 4. A vent hole 13 is provided on the top surface 12 of the cap 1 to prevent suffocation when an infant or the like accidentally swallows it.

Next, FIG. 3 shows a second embodiment. In the cap 1 of the first embodiment described above, the outer cap 3 and the middle cap 4 are integrally molded, but in the cap 14 of the second embodiment, the outer cap 15 and the middle cap 16 are molded separately to form the middle cap. 16 is fixed to the inside of the outer cap 15 by press fitting and locking. The other structure is the same as that of the first embodiment.

[0008]

[Effect of device]

 The present invention is as described above. By providing the seal fitting portion on the middle cap separately from the click fitting portion, the structure of the click fitting portion does not affect the seal fitting portion. The seal function can be fully achieved, the click fitting part is not affected by the structure of the seal fitting part, and the slit can be freely installed without limitation, so click fitting is possible. There is an effect that it is possible to securely and easily attach / detach the middle cap, and further, the adverse effects of the above-mentioned known examples can be eliminated.

[Brief description of drawings]

FIG. 1 is a sectional view showing a first embodiment.

FIG. 2 is a cross-sectional view showing a state in which the cap of the first embodiment is attached to a writing instrument.

FIG. 3 is a cross-sectional view showing a state in which the cap of the second embodiment is attached to a writing instrument.

[Explanation of symbols]

 1,14 Cap 2 Writing instrument 3,15 Outer cap 4,16 Middle cap 5 Click fitting part 6 Seal fitting part 7 Protrusion 8 Slit 9 1st stage thin shaft part 10 2nd stage thin shaft part 11 Groove 12 Top surface 13 vents

Claims (1)

[Scope of utility model registration request] 1. A tip of a writing instrument or the like having an inner cap into which the tip of a writing instrument or the like is inserted inside the outer cap, and having an axial slit in a part of its peripheral wall near the opening edge of the middle cap. A click-fitting part that engages with the outer surface of the shaft part is provided, and a click-fitting seal-fitting part that fits airtightly with the outer surface of the tip shaft part of a writing instrument, etc. A cap for a writing instrument or the like, which is provided separately from the mating part.