JPH09123674A - Cap of writing instrument of the like - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively obtain an air flow passage for respiration even when a child erroneously swallows a cap while satisfying the original object of the cap. SOLUTION: A cover 3 is separated from an outer cap 1 by a coiled spring 4 in the state that a cap A is not mounted at a writing instrument body B, a vent hole 5 is opened, and the cover 3 blocks the hole 5 in a sealed state.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cap for a writing instrument or the like having a vent hole for suffocation formed on the top of a cap body.

[0002]

2. Description of the Related Art Heretofore, it has been known that writing instruments, applicators, etc. used by infants are provided with an air flow passage so as not to suffocate even if the cap is accidentally swallowed. There is. For example, the actual Kaihei 3-
No. 9879, Jitsukaihei 1-169385 and the like. In addition, it is actually fair that the cap has an air vent communicating with the inside of the cap and an elastic body that immerses and shields the tip of the writing instrument.
No. 5991.

[0003]

However, the cap is originally intended to prevent volatilization of contents such as ink from the pen tip of a writing instrument or an applicator or the application tip when it is not used, and to prevent the cap from penetrating. It is used to prevent the damage of the pen tip itself, etc. by contacting other objects with the contents attached thereto. Therefore, the formation of the holes in the cap itself may cause a disadvantageous situation in consideration of the original purpose of the cap.

[0004]

That is, according to the present invention, in a cap such as a writing instrument in which a vent for suffocation is formed on the top of the cap body, the vent can be closed on the top of the cap body. A lid member is provided, and the lid member is biased outward by an elastic member disposed between the lid body and the cap body, and has a fitting portion with respect to the body such as a writing instrument attached to the cap body. The gist is the cap of a writing instrument that is characteristic.

[0005]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
1 and 2 show the first embodiment of the present invention. FIG. 1 shows a state in which the cap A of the present invention is attached to a writing instrument body B, and FIG. 2 shows a state in which the cap A is removed from the writing instrument body B. Is shown. The cap A of this example includes an outer cap 1, an inner cap 2, a lid 3 and a coil spring 4. The outer cap 1 has a vent hole 5 for suffocation at the top, and has a plurality of inward projections 6 that fit with the writing instrument body B near the open end of the inner wall at equal intervals in the same circumference.

The inner cap 2 has a connecting portion 7 for the lid 3 on the top thereof, and the inner cap 2 and the lid 3 are connected and fixed by an appropriate method such as adhesion, fitting, and welding to integrally form a lid member. Further, the inner wall of the inner cap 2 has a writing instrument body B.
A circumferential inward projection 8 that airtightly abuts against the writing instrument body B is formed, and fitting projections 9 for the writing instrument body B are formed at equal intervals in the same circumferential direction. Further, the lid 3 is designed to keep the vent hole 5 of the outer cap 1 closed. Further, on the outer circumference of the inner cap 2, a plurality of ribs 10 that radially project are formed, and the ribs 10 slidably engage with the grooves 11 formed on the inner wall of the outer cap 1 so that the inner cap 2 can be slid in the radial direction. And the movement in the circumferential direction is restricted.

The lid 3 connected to the inner cap 2 is made of silicone rubber, butadiene rubber, nitrile rubber, butyl rubber,
It is made of synthetic rubber such as urethane rubber, and has a large diameter portion 12 for locking the coil spring 4 and a small diameter portion 13 for closing the vent hole 5 of the outer cap 1. The coil spring 4 is interposed between the top of the outer cap 1 and the large-diameter portion 12 of the lid 3, and biases the lid 3 outward (upward in the drawing) with respect to the outer cap 1. . The coil spring 4
Is smaller than or equal to the diameter of the small-diameter portion 13 of the lid 3, the lid 3 and the coil spring 4 can be engaged with each other, and the lid 3 and the coil spring 4 are integrated at the time of assembly to improve the ease of assembly. You can also

As shown in FIG. 2, when the cap A is not attached to the writing instrument body B, the fitting of the inner cap 2 integrally formed with the lid 3 to the writing instrument body B is released. The small diameter portion 13 of the lid 3 is separated from the vent hole 5 of the outer cap 1 by the elastic force of the coil spring 4 as an elastic member. That is, the ventilation hole 5 is in an open state, and the ventilation passage is secured as the cap A. In the drawings showing the state in which the cap A is removed from the writing instrument main body B, the flow of breathing through the ventilation passage for suffocation is indicated by an arrow I in the drawings.

When the cap A is attached to the writing instrument body B, first, the pen tip 14 of the writing instrument body B is inserted through the opening of the outer cap 1 and the inner projection 6 of the outer cap 1 is inserted into the fitting portion of the writing instrument body B. The outer cap 1 and the writing instrument main body B are fixed to each other by being fitted with the fixing member 15. Then the lid 3
Is pressed to close the vent hole 5 of the outer cap 1, and the fitting protrusion 9 of the inner cap 2 is fitted to the fitting portion 16 of the writing instrument body B to fix the positional relationship between the writing instrument body B and the lid 3. Then, the inward projection 8 is brought into contact with the writing instrument main body B in an airtight state. By the above operation, the internal space of the cap A in which the pen tip 14 exists is kept airtight.

The second embodiment shown in FIGS. 3 and 4 will be described. Similarly to the example shown in FIG. 1 and FIG. 2, the present example also shows a state in which FIG.
Shows the state of being separated from the writing instrument main body B. The cap A of this example is basically an outer cap 1, a lid 3 and a coil spring 4, and is an example of a so-called single cap in which there is no inner cap as in the examples shown in FIGS. 1 and 2. Is.

The outer cap 1 has a vent hole 5 for preventing suffocation at the top, and a plurality of inward projections 6 for fitting with the writing instrument main body B on the inner wall near the opening at the same circumference at equal intervals. Is similar to the above example, but a circumferential inner projection 8 is formed on the bottom side of the inner wall of the inner projection 6 for hermetically sealing the inner space of the cap.

The material of the lid 3 is different from that of the first embodiment, polyethylene, polypropylene, PET, PEB,
It is made of a synthetic resin such as AS, ABS, etc., and a coil spring 4 is interposed between the outer cap 1 and the top of the outer cap 1 to urge the lid 3 outward with respect to the outer cap 1. In addition, lid 3
Has a large diameter portion 12 that locks the coil spring 4 and a small diameter portion 13 that closes the vent hole 5 of the outer cap 1. Further, a fitting arm 17 is provided at the tip of the small-diameter portion 13 for fitting with the writing instrument main body B to position the lid 3 in a state where the vent hole of the outer cap 1 is closed. This fitting arm 1
A fitting ring 18 that fits into the fitting portion 16 of the writing instrument main body B is formed at the tip portion of 7. Here, in order to improve the airtightness of the lid 3 in the closed state with respect to the ventilation hole 5, an airtightness maintaining member made of an elastic material such as synthetic rubber is interposed between the two, or the lid 3 and / or the ventilation hole 5 are contacted with each other. The airtightness can be improved by subjecting the contacting portion to a surface treatment with a soft synthetic resin.

When the cap A is attached to the writing instrument body B, the relative positional relationship between the outer cap 1 and the writing instrument body B is first fixed in the same manner as in the first embodiment described above, and then the lid 3 is attached. The vent hole 5 of the outer cap 1 is closed by pressing and the fitting ring 18 of the fitting arm 17 is fitted to the fitting portion 16 of the writing instrument body B. Since the inner wall of the outer cap 1 is formed with a circumferential inner protrusion 8 for making the inner space of the cap airtight, the airtightness of the inner space of the cap is completed by closing the vent hole 5.

Further, when the cap A is removed from the writing instrument body B, the fitting between the outer cap 1 and the writing instrument body B is released, and at the same time, the engagement between the fitting ring 18 of the lid 3 and the writing instrument body B is released. The lid 3 biased by the coil spring 4 which is an elastic member immediately opens the vent hole 5. Therefore, it goes without saying that the vent hole 5 is always formed when the cap A and the writing instrument body B are separated from each other, and the vent hole 5 is opened at the same time when the pen tip 14 insertion port of the cap A is opened. Therefore, the space inside the cap can be instantly made equal to the atmospheric pressure, and the leakage of ink or the like due to the pressure change when the cap A is attached or detached can be suppressed as much as possible.

FIGS. 5 and 6 show modifications of those shown in FIGS. That is, similarly to the examples of FIGS. 3 and 4, there is no inner cap as an airtight holding member. Further, the outer cap 1 is also not formed with a circumferential inward projection 8 that hermetically seals the inner space of the cap. This is an example in which an airtight holding portion is formed on the lid 3 and is brought into direct contact with the pen tip 14 to suppress the volatilization of ink from the tip of the ballpoint pen tip. In the illustrated example, a part of the lid 3 formed of synthetic rubber which is an elastic material is used as the airtight contact portion 19 with the pen tip 14, but the airtight contact portion 19 may be attached as a separate member. By doing so, it can be said that it is preferable that the nib 14 can be surely sealed and that there is little space to be airtight, and that it is difficult for the nib 14 to be affected by the pressure change that occurs when the airtightness is released.

The third embodiment shown in FIGS. 7 and 8 will be described. The present example is different from the above-described examples in that a coil spring is not used as an elastic member for urging the lid 3. The cap A is an outer cap 1, an inner cap 2 and a lid 3.
And The outer cap 1 has a vent hole 5 for suffocation, a plurality of inward projections 6 that fit into the writing instrument body B in the inner hole at equal intervals in the same circumference, and an inner cap near the bottom. It has a plurality of ribs 10 that radially project inwardly and serve as sliding guides for the two. Furthermore, the inner cap 2 is
It has a connecting portion 7 for the lid 3, and the writing instrument body B is provided on the inner wall.
A circumferential inward projection 8 is formed so as to come into airtight contact with.

Here, the lid 3 has a mounting portion 20 for the outer cap 1, a closing portion 21 for closing the ventilation hole 5,
It comprises a pressing operation part 22 for inserting the lid member into the ventilation hole 5, and a joint part 23 that elastically extends to connect the closing part 21, the pressing operation part 22 and the mounting part 20. The mounting portion 20 is connected and fixed to the outer cap 1 at a position relatively outside of the vent hole 5 by an appropriate method such as adhesion, fitting, and welding. In addition, the joint 23 has a pressing operation portion 22.
A plurality of vent holes 24 are formed at radial positions with respect to. Although the joint portion 23 is in a free state in a state where the closing portion 21 does not close the ventilation hole 5 of the outer cap 1,
When the ventilation hole 5 is closed, the joint portion 23 is extended to close the ventilation hole 5. That is, when the lid 3 closes the vent hole 5 of the outer cap, the closing portion 21 and the pressing operation portion 22 are urged outward by the elasticity of the joint portion 23. As shown in FIG. 7, the closed portion 21 and the pressing operation portion 22 can maintain the closed state of the vent hole 5 because the inner cap 2 attached to the lid 3 is fitted to the writing instrument body B. As shown in FIG. 8, when the cap A is removed from the writing instrument body B, the vent hole 5 is opened by the urging force of the joint portion 23.

In addition to the above, various modifications can be made without departing from the gist of the present invention. As an example, the writing instrument main body B has been described by using the pen tip 14 as a ballpoint pen tip, but other than this, a felt pen, a synthetic resin pen tip having a communicating porosity, a fine rod nib, or the like may be used. Further, the lid 3 may be provided with functions such as ink color display and pen tip display by coloring, printing, attaching a sticker, or the like.

[0019]

EFFECT OF THE INVENTION The cap of the writing instrument of the present invention suppresses volatilization of the contents such as ink from the pen tip or the application tip of the writing instrument or the applicator, which is the original function of the cap, or the pen tip or the like. The risk of damaging the prevention of damage to the pen tip itself, etc. by contacting other objects with the contents of the pen, etc. is minimized, and even if a child accidentally swallows it, The air flow passage is effectively secured.

[Brief description of the drawings]

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

FIG. 2 is a sectional view showing the first embodiment.

FIG. 3 is a sectional view showing a second embodiment.

FIG. 4 is a sectional view showing a second embodiment.

FIG. 5 is a sectional view showing a modification of the second embodiment.

FIG. 6 is a sectional view showing a modification of the second embodiment.

FIG. 7 is a sectional view showing a third embodiment.

FIG. 8 is a sectional view showing a third embodiment.

[Explanation of symbols]

 A Cap B Writing instrument main body 1 Outer cap 2 Inner cap 3 Lid 4 Coil spring 5 Vent hole 6 Inner protrusion 7 Connection portion 8 Inner protrusion 9 Fitting protrusion 10 Rib 11 Groove 12 Large diameter portion 13 Small diameter portion 14 Pen tip 15 Fitting Joint part 16 Fitting part 17 Fitting arm 18 Fitting ring 19 Airtight abutting part 20 Mounting part 21 Closing part 22 Pressing operation part 23 Joint part 24 Vent hole

Claims (1)

[Claims] 1. A cap, such as a writing instrument, in which a vent hole for preventing suffocation is formed on the top of the cap body, a lid member capable of closing the vent hole is provided on the top of the cap body, and the lid member comprises: A cap for a writing instrument or the like, which is urged outward by an elastic member disposed between the cap body and a fitting portion for a body such as a writing instrument attached to the cap body.