JP2008037023A - Grip of writing utensil - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a grip of a writing utensil which can be easily held by allowing the elastic deformation of projections 1A of an inner grip 1 and an outer grip 2 when the outer grip 2 is held, by forming an appropriate space between the inner surface of the inner grip 1 and the surface of a barrel 8. <P>SOLUTION: The grip to be fitted to a writing utensil holding part, is of a double layer structure made up of the inner grip 1 of a soft material and the outer grip 2 of likewise a soft material. In addition, the projections 1A are formed on the inner surface of the inner grip 1 and an appropriate space is formed between the inner surface of the inner grip 1 and the surface of the barrel 8. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a grip attached to a portion that holds a writing instrument.

Conventionally, a grip attached to a portion for holding a writing instrument is formed of a soft material laminated on the upper and lower layers of an inner layer and a surface layer, and the Shore hardness of the inner layer is Hs (JIS A) 5 to 30, There is known a grip of a writing instrument in which a layer has a Shore hardness of Hs (JIS A) 40 or more. (See Patent Document 1)
JP 2000-355185 A

However, the grip of the writing instrument described above has no space between the inner layer and the surface layer, and sufficient elastic deformation cannot be obtained when gripped by hand.
An object of the present invention is to provide a grip for a writing instrument that solves the above-described problems.

  The present invention provides a grip attached to a portion for holding a writing instrument, wherein the grip has a two-layer structure of an inner grip made of a soft material and an outer grip made of a soft material, and a protrusion is formed on the inner surface of the inner grip. The first gist is that an appropriate space is formed between the inner surface of the inner grip and the surface of the shaft cylinder.

  A second gist is that a number of columnar protrusions are formed on the inner surface of the inner grip, and an appropriate space is formed between the inner surface of the inner grip and the surface of the shaft tube.

  Furthermore, a third gist is that a plurality of circumferentially extending protrusions are formed on the inner surface of the inner grip, and an appropriate space is formed between the inner surface of the inner grip and the surface of the shaft tube.

  Furthermore, the fourth gist is that the outer grip is made of a soft material having transparency.

  In the present invention, by forming a protrusion on the inner surface of the inner grip and forming an appropriate space between the inner surface of the inner grip and the surface of the shaft tube, the inner grip can be sufficiently elastically deformed. Moreover, since the protrusions are formed on the inner surface of the inner grip, even if the protrusions are pushed and inclined when the inner grip is pressed, the distance between the protrusions does not change beyond the expansion and contraction of the inner grip. The force with which the inner grip is pressed is reliably distributed to the plurality of protrusions, and a soft feel is obtained as a whole. Furthermore, since the inner grip is covered with the outer grip and has a two-layer structure, the force pressed by the hand is first dispersed by the outer grip and transmitted to the inner grip. The effect that it is easy to hold is exhibited.

  An appropriate space is formed between the inner surface of the inner grip and the surface of the shaft cylinder, and the grip is configured in a two-layer structure of the inner grip and the outer grip, so that when the outer grip is gripped by hand, Since the inner grip is elastically deformed sufficiently, a writing instrument grip that is very easy to grip has been realized.

  Hereinafter, based on FIG.1 and FIG.2, the grip of the writing instrument of Example 1 in this invention is demonstrated. First, a large number of quadrangular prism-shaped protrusions 1A are formed at equal intervals on the inner surface of the inner grip 1 made of a soft material. Further, an inner collar 1B is formed at the front end and the rear end of the inner grip 1. Next, an inner collar 2A is formed at the front end of the outer grip 2 made of a soft material. Further, the outer shape of the outer grip 2 is gradually reduced in diameter from both ends toward the middle portion. The outer grip 2 is put on the inner grip 1 to constitute a writing instrument grip.

  Next, an example in which the grip of the writing instrument of the present invention is provided in a knock mechanical pencil will be described with reference to FIG. First, the head 3A of the chuck 3 is divided into a plurality of parts so as to be spreadable, and a tapered surface is formed on the head 3A. A fastening ring 4 is fitted on the head 3A of the chuck 3 and a pipe-shaped core tank 5 is press-fitted and fixed to the rear part of the chuck 3. Further, a spring 7 is stretched between the washer 6 for receiving the tightening ring 4 and the core tank 5, and the taper surface of the chuck 3 is pressed against the tightening ring 4 to constitute a mechanism portion.

  A front portion 8A of the shaft cylinder 8 is formed with a small diameter, and the inner grip 1 is fitted on the front portion 8A. Next, the outer grip 2 is fitted on the inner grip 1. Then, the inner collar 1 </ b> B and the protrusion 1 </ b> A of the inner grip 1 come into contact with the surface of the shaft cylinder 8, and an appropriate space is formed between the inner surface of the inner grip 1 and the surface of the shaft cylinder 8.

  After the mechanism portion is inserted from the front side of the shaft tube 8, the base 9 is screwed into the shaft tube 8, and the washer 6 is held between the inner stage 9 </ b> A of the base 9 and the front end of the shaft tube 8. Further, when the base 9 is screwed together, the outer grip 2 is clamped by the rear end of the base 9 and the outer stage 8B of the shaft cylinder 8, and by the inner flange 2A of the outer grip 2 and the front outer stage 8C of the shaft cylinder 8. The inner grip 1 is clamped.

  In the first embodiment, when the outer grip 2 is gripped by hand, the force pressed by the hand is dispersed by the outer grip 2 and transmitted to the inner grip 1. In addition, since the space is formed between the inner surface of the inner grip 1 and the surface of the shaft tube 8, the inner grip 1 has a shape that is easily elastically deformed. Moreover, even if the inner grip 1 is pushed and the protrusions 1A are inclined, the distance between the protrusions 1A does not change more than the amount of deformation by which the inner grip 1 expands and contracts. It is reliably dispersed in the portion 1A and an overall soft feel is obtained.

  FIG. 4 shows the grip of the writing instrument of Example 2 according to the present invention. The inner grip 11B is formed at the front end and the rear end of the inner grip 11, and a plurality of protrusions 11A extending in the circumferential direction at equal intervals are formed on the inner surface of the inner grip 11. The inner grip 11 is covered with the outer grip 2 to constitute a writing instrument grip. In the case of Example 2, a slightly harder feel than that of Example 1 can be obtained.

  As the inner grip, silicon rubber having a hardness (JIS A) 10, 30, or 50, or an elastomer having a hardness (JIS A) 30, 50, or 70 can be considered. As the outer grip combined with these inner grips, various soft grips can be set by using silicon rubber having a hardness (JIS A) of 50.

  In addition, the grip of the writing instrument of the present invention may be formed of a soft material colored on the inner grip, and the outer grip may be formed of a transparent soft material, or the inner grip and the outer grip may be formed of a transparent soft material. It is done.

  Furthermore, the grip of the writing instrument of the present invention is not limited to a knock-type mechanical pencil, but can be used for various writing instruments such as a ballpoint pen.

  When the grip of the writing instrument is gripped by hand, the pressed force is dispersed throughout, and a soft feel can be set as a whole.

It is sectional drawing which shows the grip of the writing instrument of Example 1 of this invention. (Example 1) It is sectional drawing which shows the AA line of FIG. (Example 1) It is principal part sectional drawing which shows the knock type mechanical pencil which provided the grip of the writing instrument of Example 1. FIG. (Example 1) It is sectional drawing which shows the grip of the writing instrument of Example 2 of this invention. (Example 2)

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Inner grip 1A Inner grip 1 protrusion 2 Outer grip 8 Shaft cylinder 11 Inner grip 11A Inner grip 11 protrusion

Claims (4)

  In the grip attached to the part that holds the writing instrument, the grip is composed of a two-layer structure consisting of an inner grip made of soft material and an outer grip made of soft material, and a protrusion is formed on the inner surface of the inner grip. A grip for a writing instrument, wherein an appropriate space is formed between the inner surface of the tube and the surface of the shaft tube.   2. The grip for a writing instrument according to claim 1, wherein a plurality of columnar protrusions are formed on the inner surface of the inner grip, and an appropriate space is formed between the inner surface of the inner grip and the surface of the shaft tube.   2. A grip for a writing instrument according to claim 1, wherein a plurality of circumferentially extending protrusions are formed on the inner surface of the inner grip, and an appropriate space is formed between the inner surface of the inner grip and the surface of the shaft tube. .   The writing instrument grip according to any one of claims 1 to 3, wherein the outer grip is made of a soft material having transparency.

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