JP2597688Y2 - Caps for writing instruments - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cap such as a writing implement having a middle cap into which a tip shaft of a writing implement is inserted inside an outer cap.

[0002]

2. Description of the Related Art A cap of this type requires that a middle cap, in particular, completely fulfill a sealing function. By the way, in order to confirm whether or not the middle cap is completely fitted, it is preferable to click-fit the middle cap. However, if a ridge or the like for engagement is provided and click-fitted, the middle cap becomes difficult to detach and attach.In order to facilitate elastic deformation of the middle cap, a slit is generally provided in the middle cap. There are many. However, by providing the slit in the middle cap, the sealing function of the middle cap may be impaired. In order to solve this problem, for example, as shown in Japanese Utility Model Publication No. 4-15511, the range of the slit provided in the middle cap is limited, that is, the engagement portion such as a ridge from the opening edge of the middle cap. A cap has been proposed which limits the slit to a range not exceeding the engagement portion to the vicinity.

[0003]

[Problems to be solved by the present invention]
Restricting the range of the slit from the opening edge of the middle cap to the vicinity of the engaging portion to be click-fitted makes it difficult to determine the position of the end of the slit. When it is set near, it is difficult to form a slit, and despite the fact that the engaging part is thick due to ridges etc., there is no slit at the position of the engaging part, so the elastic deformation of the engaging part There is an adverse effect such that the attachment and detachment of the middle cap is not so easy because it is suppressed. In addition, even if a slit is provided in the middle cap as in the cap shown in Japanese Utility Model Application Laid-Open No. 63-145679, if the slit is located deeper than the engagement portion such as a ridge, the Since the portion where the engaging portion is provided is not easily elastically deformed, it is not easy to attach and detach the middle cap. Therefore, according to the present invention, the sealing function of the middle cap is complete, and the click fitting can be surely performed, and furthermore, the attachment and detachment of the middle cap can be facilitated,
Moreover, an object of the present invention is to provide a cap for a writing instrument or the like that does not have the above-mentioned adverse effects.

[0004]

In order to achieve the above object, a cap such as a writing instrument of the present invention is provided with a middle cap into which the tip of the writing instrument is inserted inside an outer cap, and an opening of the middle cap. A circumferential ridge is provided on the inner surface near the edge, and an axial slit is provided at a desired position on the circumference from the opening edge to a position beyond the position of the ridge, thereby engaging with the outer surface of the tip shaft portion of a writing instrument or the like. A click fitting portion is formed, and a tapered tapered portion is provided at a position deeper than the click fitting portion in the middle cap,
Said tapered reduced diameter between the clicking engagement portion seal fitting portion which is fitted to the outer surface and airtight tip end shaft portion of such a writing instrument in a position
The click engagement portion by passing through the part is characterized in that the separately provided clearly distinguished.

[0005]

The seal fitting portion is provided separately from the click fitting portion on the middle cap so that the seal fitting portion is not affected by the structure of the click fitting portion and the sealing function is completely achieved. In addition, the click fitting portion is not affected by the structure of the seal fitting portion, and the slit can be freely provided without limitation, so that the click fitting is ensured and the attachment / detachment of the middle cap is performed. Can be facilitated.

[0006]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 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 a middle cap 4 integrally molded therein.
A click fitting portion 5 is provided at a position near the opening edge of the cap 4, and a tapered reduced diameter portion is provided at a position deeper than the click fitting portion 5 .
Click the seal fitting part 6 at the position.
Click fitting portion 5 through the tapered reduced diameter portion of
Separately provided clearly distinguished from, the inner surface of the click fitting portion 5 provided with a circumferential ridge 7, the position of the ridge 7 from the opening edge to the required position on the circumference of the click fitting portion 5 The axial slits 8 are provided in a range exceeding. Further, the click fitting portion 5 has a larger inner diameter and a slightly smaller thickness than the seal fitting portion 6. The writing implement 2 has a thin shaft portion whose outer diameter changes in three stages at the tip of the shaft, and the cap 1 is attached to the thin shaft portion. And the first stage and 2
The fine shaft portion of the first stage is inserted into the middle cap 4, and the fine shaft portion 9 of the first stage and the seal fitting portion 6 of the middle cap 4 are fitted airtightly,
The circumferential groove 11 provided on the outer surface of the second-stage narrow shaft portion 10 engages with the ridge 7 of the click fitting portion 5 of the middle cap 4. The top surface 12 of the cap 1 is provided with a ventilation hole 13 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, the outer cap 3 and the middle cap 4 are integrally formed. However, in the cap 14 of the second embodiment, the outer cap 15 and the middle cap 16 are formed separately, 16 is press-fitted and locked inside the outer cap 15. Other structures are the same as those of the first embodiment.

[0008]

[Effects of the Invention] The present invention is as described above, and the seal fitting portion is provided separately from the click fitting portion on the middle cap so as to influence the seal fitting portion depending on the structure of the click fitting portion. The seal function can be fulfilled completely without being received, and the click fitting part is not affected by the structure of the seal fitting part, and the slit can be freely provided without limitation. There is an effect that the click fitting can be ensured and the attachment / detachment of the middle cap can be facilitated, and further, the disadvantages of the above-mentioned known example can be eliminated. Also, between the seal fitting part and the click fitting part
Sealed fitting with tapered reduced diameter part
Slits to clearly distinguish the
Area, that is, the position of the end of the slit can be easily determined.
And at the same time, the diameter of the writing implement
The tip shaft can be smoothly guided to the seal fitting part.
The effect that can be obtained is also obtained.

[Brief description of the drawings]

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

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

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 14 Cap 2 Writing implement 3, 15 Outer cap 4, 16 Middle cap 5 Click fitting part 6 Seal fitting part 7 Ridge 8 Slit 9 First stage thin shaft portion 10 Second stage thin shaft portion 11 Groove 12 Top 13 Vent

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-49-81128 (JP, A) JP-A-63-145679 (JP, U) JP-A-56-88583 (JP, U) JP-A-57-88583 193581 (JP, U) Japanese Utility Model 60-101190 (JP, U) Utility Model Registration 2537913 (JP, Y2) Utility Model Registration 2512102 (JP, Y2) Japanese Utility Model 61-19036 (JP, Y2) Japanese Utility Model 4 −15511 (JP, Y2) Jikken 61-34145 (JP, Y2) Jikku 36-7512 (JP, Y1) (58) Fields investigated (Int. Cl. ⁶ , DB name) B43K 23/12 B43K 3/00

Claims (1)

(57) [Scope of request for utility model registration] An inner cap into which a tip of a writing instrument or the like is inserted is provided inside an outer cap, and a circumferential ridge is provided on an inner surface near an opening edge of the inner cap, and a required position on the circumference is provided. By providing a slit in the axial direction beyond the position of the ridge from the opening edge, a click fitting portion that engages with the outer surface of the distal end shaft portion of a writing instrument or the like is configured. A tapered tapered part at the back
In addition to the above, a seal fitting part that fits airtightly with the outer surface of the tip shaft part of a writing instrument etc. at a position further back is click-fitted
A cap for a writing instrument or the like, wherein the cap is clearly provided separately from the click fitting portion by interposing the tapered reduced diameter portion between the cap and the portion.