JP2895394B2 - Writing instrument cap - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a writing instrument cap in which an inner cylinder for sealing a pen body of a writing instrument body is disposed in an outer cylinder.

[0002]

2. Description of the Related Art A writing instrument cap using ink is
In many cases, an inner cylinder is arranged in an outer cylinder of a cap, and the pen body of the writing implement body is sealed with the inner cylinder to prevent evaporation of ink. In addition, the cap is not only an essential function such as prevention of ink evaporation, but also an important part in design, but in order to give a sense of quality, the overall length of the cap was lengthened to some extent, and the cap was attached to the writing implement body Sometimes it is necessary to balance the cap and the length of the writing implement body exposed from the cap.

[0003]

As described above, when the entire length of the cap is increased to some extent, in the case of a writing instrument in which the length of the pen body portion to be sealed is short, the length of the inner cylinder becomes shorter, and the inner cylinder becomes outer. It will be located in the deep part from the mouth of the cylinder.
On the other hand, when the writing instrument body is inserted and attached to the abutment side of the cap, at the beginning of the cap attaching operation, the axis of the cap held in one hand and the axis of the writing instrument body held in the other hand do not necessarily match. It is often inserted at a certain angle.

Therefore, when the short inner cylinder is positioned deeper from the abutment side of the outer cylinder, at the beginning of the cap mounting operation, the tip of the pen comes into contact with the inner wall of the outer cylinder. May come into contact with and be caught by the leading edge of the inner cylinder. For this reason, it is difficult to attach the cap, and there may be a problem that the pen body is damaged.

Accordingly, the present invention provides a writing instrument cap that can be easily attached to the writing instrument main body even when the short inner cylinder is disposed inside the long outer cylinder and does not cause damage to the pen body when attached. Aim.

[0006]

In order to achieve the above object, the present invention provides an inner cylinder for sealing a pen body of a writing instrument main body in an outer cylinder, and the inner cylinder engages with the outer cylinder when attached to the writing instrument main body. In a writing instrument cap in which a stop portion is engaged with a writing instrument main body, an inner cylinder is disposed so as to be able to move back and forth within an outer cylinder, and a first stopper and a second stopper are formed on an outer peripheral surface of the inner cylinder. A first projection and a second projection for lightly holding the inner cylinder are provided on the peripheral surface.
When the projection is formed and the writing instrument body is inserted into the cap and attached, the inner cylinder moves to the inner bottom side of the outer cylinder, and the second stopper contacts the annular step formed on the outer cylinder, and the inner cylinder moves to the rear of the outer cylinder. When the cap is removed at the bottom, the inner cylinder moves to the abutment side of the outer cylinder as the writing instrument body is pulled out, and
The stopper abuts against the annular step of the outer cylinder and stops, and is lightly held by the first projection.
When the holding of the inner cylinder by the projection is released, the inner cylinder becomes the second cylinder.
Be held lightly by the projections.

[0007]

In other words, when the cap is removed, the inner cylinder movably arranged in the outer cylinder moves to the abutment side of the outer cylinder with the withdrawal of the writing implement body and is held at the abutment side. A short inner cylinder is arranged in the outer cylinder, and at the beginning of the cap mounting operation, even if the axis of the cap and the axis of the writing instrument body have a large angle, the tip of the pen body does not immediately contact the inner wall of the outer cylinder. Get inside the inner cylinder. Therefore, the pen body can be easily attached to the writing instrument main body, and there is no possibility that the pen body will be damaged at the time of attachment.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to the embodiments shown in the drawings. FIG. 1 shows an example in which the cap of the present invention is attached to a writing instrument main body 3 which is a marker in which a pen body 31 is formed in a rod shape from a fibrous body or plastic. In FIG. , On the inside flank,
An annular step 11 having one tapered surface is formed.
And, on the inner wall of the outer cylinder 1, a locking projection 13, which is locked to the writing implement body 3 when the cap is attached, in order from the abutting side,
A second projection 14 for lightly holding the inner cylinder 2 and a first projection 12 for lightly holding the inner cylinder 2 moved to the abutment side.
Are formed.

On the other hand, although the inner cylinder 2 is a bottomed cylindrical body, it is not directly fixed to the outer cylinder 1 but is movably arranged in the outer cylinder 1. Inside the abutting side of the inner cylinder 2, there is a writing implement body 3
An annular projection 23 for tightly sealing the pen body 31 is formed in close contact with the outer peripheral surface of the front end 32 of the front end 32. A second projection is provided on the outside of the abutment side to prevent the inner cylinder 2 from coming off to the tail end side. A stopper 22 is formed. Further, a first stopper 21 for preventing the inner cylinder 2 from coming off to the abutment side is formed outside the tail end side of the inner cylinder 2.

When the writing instrument main body 3 is inserted and attached from the abutment side of the cap of the present invention, the annular projection 23 of the inner cylinder 2 comes into close contact with the outer peripheral surface of the front opening 32 of the writing instrument main body 3 so that the inner cylinder 2 becomes a pen. The body 31 is hermetically sealed, the second stopper 22 of the inner cylinder 2 comes into contact with the annular step 11 of the outer cylinder 1, and the locking projection 13 of the outer cylinder 1 presses against the outer peripheral surface of the writing instrument body 3. Locked.

In writing, when the writing implement main body 3 is pulled out from the cap, the annular projection 23 of the inner cylinder 2 is attached to the writing implement main body 3.
The inner cylinder 2 moves to the abutment side together with the writing instrument body 3 because the inner cylinder 2 is in close contact with the outer peripheral surface of the front end 32 of the inner cylinder 2, and as shown in FIG. Stops by contacting 11. That is, the inner cylinder 2 stops at a position near the abutment side of the outer cylinder 1. Therefore, the writing instrument main body 3 is pulled out from the cap and becomes writable, but at this time, the first stopper 21 of the inner cylinder 2 rides over the first projection 12 of the outer cylinder 1,
The first projections 12 of the outer cylinder 1 lightly hold the inner cylinder 2 at a position near the abutment side of the outer cylinder 1.

Next, when the writing is completed, the user holds the cap with one hand and holds the writing instrument body 3 with the other hand, and the inner cylinder 2 is positioned at a portion near the abutment side of the outer cylinder 1. Therefore, even if the axis of the cap and the axis of the writing instrument body 3 have a large angle, the pen body 3 immediately enters the inner cylinder 2 without hitting the inner wall of the outer cylinder 1. Then, when the writing instrument main body 3 is further inserted, the state shown in FIG. 1 is obtained, and the mounting is completed. Therefore, the tip of the pen body 31 does not come into contact with the tip edge of the inner cylinder 2, and the mounting of the writing instrument body 3 is easy,
Further, even if the pen body 31 is formed of a fibrous body or plastic into a rod shape and is weak, there is no risk of damage.

The cap of the present invention is a safety cap that does not suffocate even if the child swallows it by mistake. As shown in FIGS. 4 and 5, the first stopper 21 and the second stopper 22 have notches. 21a and notch 2
2a are formed, and a ventilation portion is formed between the outer cylinder 1 and the inner cylinder 2. Also, since the holding of the inner cylinder 2 by the first projections 12 of the outer cylinder 1 is light, the inner cylinder 2 may move due to vibration or impact, but as shown in FIG. The inner cylinder 2 is held. Therefore, even if the cap in the state shown in FIGS. 2 and 3 is accidentally swallowed, the inside of the outer cylinder 1 communicates from the abutment side to the tail end side and does not suffocate.

[0014]

As described above, in the writing instrument cap of the present invention, the inner cylinder movably disposed in the outer cylinder moves to the abutment side of the outer cylinder as the writing instrument body is pulled out, and Since it is held on the side, it is easy to attach to the writing instrument main body, and there is no risk of damaging the pen body when attaching.

[Brief description of the drawings]

FIG. 1 is a sectional view of an embodiment of the present invention.

FIG. 2 is an explanatory view when the writing instrument main body is removed from a cap.

FIG. 3 is an explanatory diagram when the writing instrument main body is removed from the cap.

FIG. 4 is a cross-sectional view taken along line AA of FIG.

FIG. 5 is a sectional view taken along line BB in FIG. 3;

[Explanation of symbols]

 Reference Signs List 1 outer cylinder 11 annular step 2 inner cylinder 21 first stopper 22 second stopper 3 writing implement main body 31 pen body 32 front end

Continuation of front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B43K 23/12 B43L 19/00

Claims (1)

(57) [Claims] 1. A writing instrument cap in which an inner cylinder for sealing a pen body of a writing instrument main body is disposed in an outer cylinder, and a locking portion of the outer cylinder is engaged with the writing instrument main body when attached to the writing instrument main body. The cylinder is disposed in the outer cylinder so as to be able to move back and forth, a first stopper and a second stopper are formed on an outer peripheral surface of the inner cylinder, and a first stopper for lightly holding the inner cylinder is formed on an inner peripheral surface of the outer cylinder. A projection and a second projection are formed, and when the writing instrument main body is inserted into the cap and mounted, the inner cylinder moves to the inner bottom side of the outer cylinder and the second stopper comes into contact with the annular step formed on the outer cylinder. When the cap is removed, the inner cylinder moves to the abutment side of the outer cylinder as the writing instrument body is pulled out, and the first stopper comes into contact with the annular step and stops. And the first projection is lightly held by the first projection. When the holding of the inner cylinder is released by the inner cylinder is a writing instrument cap, characterized in that it is lightly held by the second projection.