JPH10100585A - Cap setting structure of writing implement - Google Patents

Abstract

PROBLEM TO BE SOLVED: To set a cap to a writing implement main body smoothly and surly and to enable the prevention of leakage of ink,etc., in the writing implement by holding the airtightness of the cap of a direct liquid type writing implement in particular. SOLUTION: In the cap 1 of a writing implement, a vent 11 communicating with the outside and inside of an outer cylinder part 4 is formed in the bottom part of a ring-shaped recessed groove 9 which is formed between an inner cylinder part 2 and the outer cylinder part 4, on the wall surface of the outer cylinder part 4 communicating with the outside, by the deformation of the ring-shaped elastomer 20 of a writing implement main body 14 associated with the contact of a inner cylinder bottom part 3, in setting the cap, compressed and entrapped air is discharged surely from the vent so that resistance by air is eliminated and blocking can be done smoothly and surely, the airtightness of the cap is held by its sure setting to prevent the pen point from being dried, and the leakage of ink, etc., can be checked surely.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cap mounting structure for a direct writing pen such as a marker.

[0002]

2. Description of the Related Art Conventionally, a cap attached to a direct liquid type writing instrument such as a marker has an airtightness at the time of attaching the cap in order to prevent the ink inside the writing instrument main body from leaking due to drying of a pen tip and heat. Although emphasis is placed on airtightness when the cap is attached, excessive air is compressed and included in the cap as the cap is attached, causing backflow into the writing instrument and incomplete attachment of the cap. Because
In order to discharge air contained in the cap when the cap is mounted by any means, for example, an annular elastic body is mounted on the writing instrument body, and a through hole is formed in the cap, The air that is compressed and contained in the cap along with the attachment of the cap is discharged from the through hole, and the through hole is finally sealed with an annular elastic body to maintain the airtightness in the cap ( 4-107
No. 086) or by holding an elastic seal portion through a mounting portion and a telescopic portion in a cap having a vent hole at the top, so that when attached to this writing instrument, air compressed and contained in the cap is removed from the top of the cap. While discharging from the vents
Finally, the elastic seal part closes the air hole at the top of the cap, and closes and closes the pen tip of the writing instrument,
What prevents leakage of ink, etc. (Japanese Utility Model Laid-Open No. 6-457)
No. 79) has been proposed.

[0003]

However, in the case of Japanese Utility Model Application Laid-Open No. 4-107068, for example, the compression of air generated in the cap mounting process and the inclusion of the cap in the cap are inevitable. This is performed by discharging air through the through hole, and since the through hole itself is finally sealed by the annular elastic body, airtightness is maintained, but with the attachment of the cap, Since the generated compression and the discharge of the contained air are performed through the through holes formed in the cap, since the opening of the cap is not closed at the beginning of the mounting of the cap, it is easily compressed into the cap. However, the air contained therein is discharged, but at the time when the mounting of the cap is completed, the opening of the cap is already closed by the writing instrument main body, and the cap is compressed and included in the cap. Air cannot be discharged, the compressed air inside the cap cannot be discharged only from the through-hole of the cap, and the air contained in the cap cannot be discharged reliably. Because of the increased air resistance, it is easy for the cap to be incompletely attached due to the resistance of air generated to the cap, causing the pen tip to dry or leaking ink due to a decrease in airtightness in the cap, There are drawbacks that can be very inconvenient for the user.

[0004] In the case of Japanese Utility Model Laid-Open No. 6-45779, air compressed and contained in the cap is easily discharged from the vent hole provided at the top of the cap as the cap is mounted, and after the cap is mounted. Since the air hole at the top of the cap and the pen tip itself are sealed by an elastic seal portion disposed in the cap, it is possible to maintain airtightness in the cap and also prevent leakage of ink and the like, Since the mounting structure of the elastic seal portion for closing the air hole at the top of the cap and also closing the pen tip is complicated, the manufacturing cost of the cap used for the writing instrument is significantly increased, and the cap is sold at a low price. It is difficult to apply to the writing instrument itself, and the elastic seal that closes the top of the cap also covers the pen tip at the same time. By repeating, damaged by striking impact of the pen tip to be repeated elastic sealing portion itself is assumed likely to occur, there is also a problem that it is difficult to prevent leakage of such airtightness and ink in the cap.

Accordingly, the present invention is to solve the above-mentioned drawbacks of the prior art. With a simple structure, the cap is easily and securely attached to a writing instrument, and the ink inside the cap is maintained while maintaining the airtightness. Etc. can be prevented.

[0006]

For this purpose, an inner cylinder portion for accommodating the pen tip, an annular locking projection at an upper portion of an inner wall surface and an outer cylinder portion projecting a locking projection at a lower portion are provided. The cap has an opening formed in the bottom of an annular groove formed between the inner cylinder and the outer cylinder, and a ventilation hole communicating with the outer cylinder in the axial direction of the writing instrument. The inner wall of the unit has a bellows part that temporarily stores excess ink, and holds a writing part that supplies ink directly to the pen tip through a supply cylinder that communicates with the built-in ink storage part. An annular elastic body which is attached to the writing instrument main body and is deformed by the close contact of the bottom of the inner cylindrical portion is provided at the upper end edge of the writing instrument main body, so that the ventilation hole of the cap can be closed freely.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The cap mounting structure according to an embodiment of the present invention is configured as described above, and is constituted by an inner cylindrical portion and an outer cylindrical portion by mounting a writing instrument cap on a writing instrument body. The compression generated in the writing instrument cap, the air contained therein, in addition to the opening of the writing instrument cap, at the bottom of the annular groove formed between the inner cylinder part and the outer cylinder part, the outside and the outer cylinder part Can be efficiently discharged from the ventilation hole communicating with the writing instrument, so that there is no resistance due to the air in the cap, and the writing instrument cap can be smoothly attached to the writing instrument body.

Further, when the writing instrument cap is finally fitted to the writing instrument main body, that is, an annular locking projection is provided at the upper and lower portions of the inner wall surface of the outer cylindrical portion which constitutes the writing instrument cap together with the inner cylindrical portion. When the edge and the locking projection are engaged with the writing instrument main body, an annular elastic body that communicates with the outside on the wall surface of the outer cylindrical part to the end and is attached at the upper end edge of the writing instrument main body that holds the writing part. Since the compressed air contained in the writing instrument cap is discharged from the air hole that can be closed by the deformation due to the close contact of the bottom portion of the inner cylindrical portion with respect to the air, and no resistance due to air is generated,
The writing instrument cap can be securely fitted to the writing instrument main body, and at the same time, the ventilation hole of the outer cylindrical portion is provided at the upper end edge of the writing instrument main body holding the writing portion. Since the inner cylindrical portion is closed by deformation that occurs at the same time as the close contact of the bottom portion of the inner cylinder with the elastic body, airtightness in the writing instrument cap is reliably maintained, and leakage of ink or the like can be prevented.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. (1) is a writing instrument cap in the writing instrument cap mounting structure according to the embodiment of the present invention, and the writing instrument cap (1) is connected to the pen tip (1) of the writing instrument body (14).
9) an inner cylindrical portion (2) for accommodating the same, and a clip (5).
It is integrally formed with an outer cylindrical portion (4) having a locking projection (8) projecting therefrom.

The outer cylindrical portion is formed at the bottom (10) of an annular groove (9) formed between the inner cylindrical portion (2) and the outer cylindrical portion (4) constituting the writing instrument cap (1). (4) A ventilation hole (11) communicating the inside and the outside is formed in the axial direction of the writing implement, and a wall (12) of the outer cylindrical portion (4) is formed as shown in FIG.
As shown in FIG. 2, the writing implement body (14) is provided with a bellows part (16) which communicates with the outside and temporarily stores an excess supply of ink.
A writing portion (15) for directly supplying ink to a pen tip (19) through a supply tube (18) communicating with the writing device (7) is fixed, and an annular shape is attached to the upper end edge of the writing instrument main body (14). The elastic body (20) is capable of closing the ventilation hole (11) by deformation accompanying the close contact of the inner cylinder bottom part (3) of the cap (1).

Since the writing instrument cap (1) according to the embodiment of the present invention has the above-described configuration, when the writing instrument cap (1) is attached to the writing instrument body (14),
As the writing instrument cap (1) is attached to the writing instrument body (14), compressed and contained air generated in the writing instrument cap (1) composed of the inner cylindrical portion (2) and the outer cylindrical portion (4) is generated. In addition to the opening (21) of the writing instrument cap (1), the outer cylindrical portion of the bottom (10) of the concave groove (9) formed between the inner cylindrical portion (2) and the outer cylindrical portion (4). (4) Since the air can be efficiently discharged from the ventilation hole (11) communicating between the inside and the outside, there is no resistance due to air in the writing instrument cap (1), and the writing instrument cap ( The mounting of 1) can be performed lightly and smoothly.

Furthermore, when the writing instrument cap (1) is finally fitted to the writing instrument main body (14), that is, the outer cylinder section (4) comprising the writing instrument cap (1) together with the inner cylinder section (2). When engaging and fixing the annular locking projections (7) and the locking projections (8) projecting at the upper and lower portions of the inner wall surface (6) of the writing instrument body (14), the annular locking projections are used. (7) is located close to the opening of the inner cylinder part (2), and from the air hole (11) communicating with the outside to the cap (1) on the wall surface (12) of the outer cylinder part (4) to the end. )
Since the air compressed and contained in the cap (1) is discharged and the resistance of the air in the cap (1) does not occur, the writing instrument cap (1) is securely fitted to the writing instrument body (14). At the same time as the outer cylinder (4)
At the upper edge of the writing instrument main body (14) holding the writing section (15) having the pen tip (19), the ventilation hole (11) of the inner cylindrical section bottom (3) of the annular elastic body (20) to be mounted. )
As a result, the airtightness in the inner cylindrical portion (2) of the writing instrument cap (1) is reliably maintained, and leakage of ink or the like can be prevented. (See FIG. 2). The plurality of ribs (13) projecting inward from the opening edge of the inner cylindrical portion (2) abut on the upper edge of the writing instrument body (14) inserted into the cap (1) and serve as a stopper. In addition, the position of the annular elastic body (20) attached to the upper edge is aimed at, whereby the variation in the closing of the ventilation hole (11) by the annular elastic body (20) can be adjusted.

FIG. 4 shows a writing instrument cap (1 ') according to another embodiment of the present invention. Even if the cap (1 ') is clogged, it is possible to secure breathing without suffocation, and the inner cylinder (2) for accommodating the pen tip (19)
And a clip (5), and an annular locking protruding edge (7) is formed on the inner wall surface (6) at an upper portion, and an outer cylindrical portion (4) is formed integrally with the outer cylindrical portion (4) protruding a locking protrusion (8) at a lower portion. Is composed of
By supporting the inner cylindrical portion (2) with a vertical rib (22) formed between the inner cylindrical portion (2) and the outer cylindrical portion (4), an air flow passage (23) communicating between the inner and outer portions of the outer cylindrical portion (4) is formed. Corresponding to the pores (11)], and communicates with the outside on the wall surface (12) of the outer cylindrical portion (4) as in the above-described embodiment. A bellows portion (16) for temporarily storing ink is provided around, and ink is directly supplied to a pen tip (19) through a supply tube (18) communicating with a built-in ink storage portion (17). Deformation of the annular elastic body (20) attached to the bottom end (3) of the annular elastic body (20) attached to the upper end edge of the writing implement body (14) is fixed by the vertical rib (22). The rib (13) which is below and protrudes inward will be kept constant.

Since the writing instrument cap (1 ') in the cap mounting structure according to another embodiment of the present invention has the above-described configuration, the writing instrument main body is similar to the writing instrument cap (1) described in the above-described embodiment. When the writing instrument cap (1 ') is attached to (14), the air generated in the cap (1') due to the attachment of the cap (1 ') due to the compression and inclusion of the cap is essentially an infant In the event of accidental ingestion, etc., the air is reliably discharged from the air flow passage (23) and the opening (21) of the cap (1 '), which act to ensure respiration without suffocation even if the airway becomes blocked. The work can be performed lightly and smoothly, and finally the writing instrument cap (1 ') is attached to the writing instrument body (14).
When engaging and fixing the writing instrument cap, the compressed air contained in the cap (1 ') is reliably discharged from the air flow passage (23), and the cap for writing instrument (1') is attached. The writing implement body (14) at the bottom (3) of the inner cylinder part that is generated
Due to the close contact with the annular elastic body (20) attached to the upper end edge of and the deformation of the annular elastic body (20) due to this close contact,
The airtightness in the writing instrument cap (1 ') is maintained,
In addition to preventing leakage of ink and the like, even if the writing instrument cap (1 ') is clogged in the airway due to accidental ingestion of an infant or the like, the inner tube (2) and the outer tube (4) The air flow passage (23) formed between the outer and inner cylinders (3) constituting the writing instrument cap (1 ') can ensure the flow of air, so that breathing can be ensured without suffocation. Therefore, safety for infants and the like can be surely improved.

[0015]

As described above, the writing instrument cap mounting structure has the above-described writing instrument cap mounting structure, so that the writing instrument cap mounting operation can be performed lightly, smoothly, and securely. Preserving the airtightness inside the cap to prevent drying of the pen tip of direct liquid writing instruments,
In addition, it has an excellent effect of reliably preventing leakage of ink and the like.

[Brief description of the drawings]

FIG. 1 is a sectional view of a writing instrument cap in a writing instrument cap mounting structure according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of the cap mounting structure of the writing implement showing a state of being attached to the writing implement main body.

FIG. 3 is a front view from above of a writing instrument cap according to the embodiment of the present invention.

FIG. 4 is a sectional view of a writing instrument cap in a writing instrument cap mounting structure according to another embodiment of the present invention.

FIG. 5 is a cross-sectional view of a writing instrument cap attachment structure showing a state of attachment to the writing instrument body.

FIG. 6 is a front view from above of a writing instrument cap according to another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Writing instrument cap 1 'Writing instrument cap 2 Inner cylinder part 3 Inner cylinder bottom part 4 Outer cylinder part 5 Clip 6 Inner wall surface 7 Annular locking projection 8 Engagement projection 9 Recessed groove 10 Bottom part 11 Vent hole 12 Wall surface 13 Rib 14 Writing instrument main body 15 Writing section 16 Bellows section 17 Ink storage section 18 Supply cylinder 19 Nib 20 Annular elastic body 21 Opening 22 Vertical rib 23 Air flow passage

Claims (1)

[Claims] 1. A cap comprising: an inner cylinder portion for accommodating a pen tip; an outer cylinder portion having an annular locking projection on an upper portion of an inner wall surface and a locking projection projecting on a lower portion. A ventilation hole communicating with the inside of the outer cylinder portion is formed in the bottom of the annular groove formed between the portion and the outer cylinder portion in the axial direction of the writing implement, and the inner wall surface of the outer cylinder portion of the cap has a writing implement body. The writing instrument body has a bellows portion that temporarily stores excess ink, and a writing section that supplies ink directly to the pen tip through a supply cylinder that communicates with the built-in ink storage section. Hold on to
A cap mounting structure for a writing implement, wherein an annular elastic body which is deformed by the close contact of the bottom of the inner cylinder portion is provided at an upper end edge of the writing implement main body, whereby the ventilation hole of the cap can be closed freely.