JP2006123337A - Cap for writing instrument - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cap for a writing instrument, which is equipped with a scratching member, which simplifies a mounting structure of the scratching member, which enables the securement of a sufficient air passage even if accidentally swallowed by an infant etc., and which enables the securement of the air passage even if the scratching member coming off from a cap body is swallowed. <P>SOLUTION: This cap 1 for the writing instrument is equipped with the scratching member 2 which is composed of an elastic material, and an opening, the front end of which is fitted with the scratching member 2 and the back end of which enables the attachment/detachment of a writing instrument body. An axially elongated through-hole 21 is formed inside the scratching member 2. The through-hole 21 and the inside of the cap body 3 communicate with each other so that ventilation can be provided. A mounting hole 31, where an outer peripheral surface of the scratching member 2 is pressed in and held, is provided. A locking wall part 32 is provided on the bottom part of the mounting hole 31. The locking wall part 32 abuts on and supports a back end of the scratching member 2 in such a manner as not to close a back-end opening of the through-hole 21 of the scratching member 2. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a writing instrument cap. More specifically, the present invention relates to a writing instrument cap provided with a rubbing member (for example, an eraser, a frictional discoloring tool, etc.) made of an elastic material at the front end portion of the cap body.

  Conventionally, in Patent Document 1, an air passage is formed between the outer surface of the eraser and the inner surface of the cap body in a writing instrument cap provided with an eraser at the front end of the cap body so that an infant or the like can breathe even if accidentally swallowed. A structure is disclosed.

  In the writing instrument cap of Patent Document 1, means for forming a rib on the inner surface of the mounting hole of the eraser or forming a rib on the outer surface of the eraser is used to form the air passage. This complicates the structure of the eraser mounting part and increases the manufacturing cost. In addition, since the gap between the outer surface of the eraser and the inner surface of the mounting hole is used as an air passage, it is difficult to obtain a sufficient air passage.

Special table 2001-504964

  The present invention solves the above-mentioned conventional problems, and is a writing instrument cap provided with a rubbing member, which has a simple mounting structure for the rubbing member and has a sufficient ventilation passage even if an infant or the like accidentally swallows it. An object of the present invention is to provide a writing instrument cap that can be secured and that can secure an air passage even if a rubbing member detached from the cap body is swallowed.

The present invention requires the following.

(Claim 1)
A scrubbing member made of an elastic material, and a scrubbing member cap that is attached to the front end portion and includes an opening in which the writing tool main body is detachable at the rear end portion, and extends axially into the scrubbing member. A writing instrument cap, wherein a through-hole is formed and the through-hole communicates with the inside of the cap body so as to allow air to flow.

(Claim 2)
A mounting hole in which the outer peripheral surface of the rubbing member is press-fitted and held is provided at the front end of the cap body, a locking wall portion is provided at the bottom of the mounting hole, and the locking wall portion is a hole of the through hole of the rubbing member. The writing instrument cap according to claim 1, wherein the rear end of the rubbing member is abutted and supported so as not to block the rear end opening.

(Claim 3)
The writing instrument cap according to claim 2, wherein the locking wall portion includes a vent hole in an axial center, and the inner diameter of the vent hole is set larger than the inner diameter of the through hole of the scraping member.

(Claim 4)
A plurality of axially extending ribs are formed on the inner peripheral surface of the cap body behind the locking wall, and the ribs press-hold and hold the outer peripheral surface of the pen tip seal member made of an elastic material. The front surface of the nib seal member and the rear surface of the locking wall portion are arranged in a non-contact state so as to prevent the sealing member from blocking the vent hole of the locking wall portion. The writing instrument cap according to claim 3, wherein the rear end opening of the cap body and the through hole communicate with each other through the space between the front surface of the pen tip seal member and the rear surface of the locking wall portion.

  According to the first aspect, it is possible to simplify the structure for attaching the rubbing member, and to suppress an increase in manufacturing cost. In addition, even if an infant or the like accidentally swallows it, a sufficient air passage can be secured. Furthermore, a sufficient air passage can be secured even if the rubbing member detached from the cap body is swallowed.

  According to the second aspect, the inside of the cap body and the through hole of the scraping member are reliably communicated with each other, so that a further sufficient air passage can be secured.

  According to the third aspect, it is possible to reliably avoid the locking wall portion from blocking the through hole.

  According to the fourth aspect of the present invention, a sufficient air passage can be secured even if the pen tip seal member is provided.

  The best mode for carrying out the present invention will be described.

[1] The present invention is a writing instrument cap 1 having a rubbing member 2 made of an elastic material, and an opening portion to which the rubbing member 2 is attached to the front end and the writing instrument main body is detachable at the rear end. It is a requirement that a through hole 21 extending in the axial direction is formed in the rubbing member 2 so that air can flow between the through hole 21 and the cap body 3 (Claim 1).

  Since the writing instrument cap 1 (Claim 1) is provided with the through-hole 21 in the rubbing member 2, the attachment structure of the rubbing member 2 can be simplified, and an increase in manufacturing cost can be suppressed. In addition, since the through hole 21 and the inside of the cap body 3 communicate with each other so that air can flow, a sufficient air passage can be secured even if an infant or the like accidentally swallows it. Furthermore, by providing the through hole 21 in the rubbing member 2, even if the rubbing member 2 detached from the cap body 3 is swallowed, a sufficient air passage can be secured.

[2] In the writing instrument cap 1 (Claim 1), the front end portion of the cap body 3 is provided with a mounting hole 31 in which the outer peripheral surface of the scraping member 2 is press-fitted and held at the bottom of the mounting hole 31. A wall portion 32 is provided, and the locking wall portion 32 abuts and supports the rear end of the rubbing member 2 so as not to block the rear end opening 34 of the through hole 21 of the rubbing member 2 (invention). Item 2) is preferred. Thereby, the inside of the cap main body 3 and the through-hole 21 of the scraping member 2 are reliably communicated, and a further sufficient air passage can be secured.

[3] In the writing instrument cap 1 (Claim 2), the locking wall portion 32 is provided with a vent hole 32a at the axial center, and the inner diameter of the vent hole 32a is set larger than the inner diameter of the through hole 21 of the scraping member 2. (Claim 3) is preferable. Thereby, it is possible to reliably avoid the locking wall 32 from blocking the through hole 21.

[4] In the writing instrument cap 1 (Claim 3), a plurality of axially extending ribs 33 are formed on the inner peripheral surface of the cap body 3 behind the locking wall 32, and the ribs 33 are elastic. The outer peripheral surface of the nib seal member 4 made of a material is pressed and held, and the pen tip seal member 4 and the front surface of the nib seal member 4 are prevented from blocking the vent hole 32a of the locking wall portion 32. The rear surface of the stop wall portion 32 is separated from the front and rear in a non-contact state, and between the ribs 33 and between the front surface of the pen point seal member 4 and the rear surface of the locking wall portion 32, It is preferable that the rear end opening 34 of the cap body 3 and the through hole 21 communicate with each other so as to allow air flow (claim 4).

  The writing instrument cap 1 (Claim 4) has a rear end opening of the cap body 3 between the ribs 33 and between the front surface of the pen point seal member 4 and the rear surface of the locking wall 32. An air passage from 34 to the through hole 21 is formed. Thereby, even if the nib seal member 4 is provided, a sufficient air passage can be secured.

1 to 5 show an embodiment of the present invention.
The writing instrument cap 1 according to the present embodiment includes a cap body 3, a rubbing member 2 attached to the front end of the cap body 3, and a nib seal member 4 attached to the cap body 3 behind the rubbing member 2. Consists of.

  The rubbing member 2 is a cylindrical body formed of an elastic material. The rubbing member 2 has a front end surface rounded into a curved surface and a rear end surface formed in a plane perpendicular to the axis. A through hole 21 is provided in the axial direction in the axial center of the rubbing member 2. The rubbing member 2 of the present embodiment may be a discoloring tool that discolors the thermochromic handwriting by frictional heat, or may be an eraser that removes the handwriting.

  The cap body 3 is a cylindrical body obtained by injection molding of synthetic resin. A clip 35 is integrally formed on the outer surface of the cap body 3.

  A mounting hole 31 is formed at the front end of the cap body 3. The outer peripheral surface of the scraping member 2 is press-fitted and fixed to the inner peripheral surface of the mounting hole 31. In order to obtain a smooth insertion property at the time of press-fitting of the rubbing member 2, an axially extending rib having a slight radial protrusion amount may be formed on the inner surface of the mounting hole 31.

  The bottom wall of the mounting hole 31 is integrally formed with a locking wall portion 32 projecting annularly inward in the radial direction. The rear end surface of the rubbing member 2 is brought into contact with the front surface of the locking wall portion 32 when the rubbing member 2 is press-fitted into the mounting hole 31. A vent hole 32a is formed in the axial center of the locking wall 32 in the axial direction. The inner diameter of the vent hole 32 a is set larger than the inner diameter of the rear end portion of the through hole 21 of the scraping member 2. As a result, even if the rear end surface of the scraping member 2 abuts against the locking wall portion 32, the locking wall portion 32 blocks the rear end opening 34 of the through hole 21 of the scratching member 2, and the air flow through the through hole 21 Will not be disturbed.

  A plurality (specifically, eight) of ribs 33 extending in the axial direction are integrally connected to the inner surface of the cap body 3 behind the rear surface of the locking wall portion 32. The rib 33 is press-fitted and held on the outer surface of the nib seal member 4 made of an elastic material. A step portion 33a is formed at the intermediate portion of each rib 33, and the front surface of the pen tip seal member 4 is brought into contact with the step portion 33a. Thereby, the front surface of the nib seal member 4 and the rear surface of the locking wall portion 32 are separated in the front-rear direction and arranged in a non-contact state. As a result, there is no possibility that the pen tip seal member 4 blocks the vent hole 32a of the locking wall portion 32. The pen tip seal member 4 is in close contact with the tip of a pen tip such as a ballpoint pen tip when the cap is mounted on the pen tip side of the writing instrument body, and seals the tip of the pen tip.

It is a longitudinal cross-sectional view of the Example of this invention. It is the sectional view on the AA line of FIG. It is the BB sectional view taken on the line of FIG. It is CC sectional view taken on the line of FIG. It is the DD sectional view taken on the line of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Writing instrument cap 2 Scraping member 21 Through-hole 3 Cap main body 31 Mounting hole 32 Locking wall part 32a Vent hole 33 Rib 33a Step part 34 Rear end opening part 35 Clip 4 Pen tip seal member

Claims (4)

A scrubbing member made of an elastic material, and a scrubbing member cap that is attached to the front end portion and includes an opening in which the writing tool main body is detachable at the rear end portion, and extends axially into the scrubbing member. A writing instrument cap, wherein a through-hole is formed and the through-hole communicates with the inside of the cap body so as to allow air to flow. A mounting hole in which the outer peripheral surface of the rubbing member is press-fitted and held is provided at the front end of the cap body, and a locking wall portion is provided at the bottom of the mounting hole. The writing instrument cap according to claim 1, wherein the rear end of the rubbing member is abutted and supported so as not to block the rear end opening. The writing instrument cap according to claim 2, wherein the locking wall portion includes a vent hole in an axial center, and the inner diameter of the vent hole is set larger than the inner diameter of the through hole of the scraping member. A plurality of axially extending ribs are formed on the inner peripheral surface of the cap body behind the locking wall, and the ribs press-hold and hold the outer peripheral surface of the pen tip seal member made of an elastic material. The front surface of the nib seal member and the rear surface of the locking wall portion are arranged in a non-contact state so as to prevent the sealing member from blocking the vent hole of the locking wall portion. The writing instrument cap according to claim 3, wherein the rear end opening of the cap body and the through hole communicate with each other through the space between the front surface of the pen tip seal member and the rear surface of the locking wall portion.

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