JP2007144700A - Shaft tube of writing implement - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a shaft tube of a writing implement which makes it possible to obtain various feels of holding, by a simple structure. <P>SOLUTION: The shaft tube of the writing implement has a constitution wherein a holding part having a diameter smaller than the outside diameter of the other part of the shaft tube is formed on the main body of the shaft tube and a transparent or semitransparent grip member formed of a soft material is fitted on the holding part. A plurality of incontinuous recesses are formed on the circumference at different positions in the axial direction, and the recesses are also different in shapes from those on one side and/or both sides thereof provided adjacently thereto in the axial direction. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a shaft tube of a writing instrument in which a grip portion having a diameter smaller than the outer diameter of another shaft tube is formed in a shaft tube main body, and a grip member made of a soft material is attached to the grip portion.

  2. Description of the Related Art Conventionally, a shaft cylinder is known in which a grip portion having a smaller diameter than the outer diameter of another shaft tube is formed on the shaft tube main body, and a grip member made of a soft material is attached to the grip portion.

In such a writing instrument shaft cylinder, in Japanese Utility Model Laid-Open No. 7-15373 “shaft grip” and Japanese Utility Model 7-37680 “shaft grip device”, a gap is formed between the grip member and the shaft cylinder. However, a shaft cylinder of a writing instrument is disclosed that has a structure in which the grip member bends inward when gripped, and can obtain elasticity.
“Japanese Utility Model Publication No. 7-15373” "Japanese Utility Model Publication No. 7-37680"

  Certainly, the shaft cylinder of the writing instrument disclosed in Patent Documents 1 and 2 is such that when the grip member is gripped, the thumb and / or the middle finger comes into contact with each other, and the grip member is deformed inward by the gripping force. It is possible to change.

  However, there are various preferences for the user, such as a person who likes a hard grip feel and a person who likes a soft grip feel. However, in Patent Documents 1 and 2 described above, there are two types of grips: a soft grip feel and a hard grip feel. I could only get a feel.

  An object of the present invention is to provide a shaft of a writing instrument that can obtain various gripping feelings with a simple structure.

  The present invention provides a shaft cylinder for a writing instrument in which a grip portion having a diameter smaller than the outer diameter of another shaft tube is formed on the shaft body, and a transparent or translucent grip member made of a soft material is attached to the grip portion. In the inner wall of the grip member and / or the outer wall of the gripping portion, a plurality of non-continuous concave portions are formed on the circumference at different positions in the axial direction, and the concave portions are adjacent in the axial direction. One and / or both of the recesses are different in shape.

  The concave portions are formed at different positions in the circumferential direction, and the concave portions are different in shape from one and / or both of the concave portions adjacent to each other in the circumferential direction.

  Further, the concave portion is formed point-symmetrically with respect to a point on the axial center of the shaft cylinder main body.

  Moreover, the said recessed part is a character and / or a figure, It is characterized by the above-mentioned.

  The soft material of the present invention is generally used as a grip member for writing instruments such as elastically deformable silicone rubber, natural rubber, butyl rubber, fluorine rubber, vinyl chloride resin, butadiene rubber, urethane rubber, polyethylene resin, other synthetic rubbers, thermoplastic elastomers, etc. What is necessary is just to select suitably from the elastic bodies known well.

  The shaft of a writing instrument that has a simple structure and can obtain various gripping feelings can be provided with a simple structure.

  Next, examples of the shaft cylinder of the writing instrument of the present invention will be described with reference to the drawings, but the present invention is not limited to the following examples.

  The shaft cylinder 1 of the writing instrument according to the first embodiment shown in FIGS. 1 to 6 is formed with a grip portion 3 having a smaller diameter than the outer diameter of the other shaft tube main body 2 in the shaft tube main body 2. A cylindrical grip member 6 made of silicone rubber is attached to obtain a writing cylinder 1. Further, a female screw part 9 of the base 7 is detachably screwed to a male screw part 8 formed at the tip of the shaft cylinder body 2.

  The small-diameter gripping portion 3 is formed with six recesses 4a, 4b, 4c, 4d, and 4e at positions different from each other in the axial direction on the circumference. The recesses (4a, 4b, 4c, 4d, 4e, 4f) have a shape in which the width of the recess gradually increases from the gripping portion front end 3a toward the rear end 3b. Further, six recesses (5a, 5b, 5c, 5d, 5e, 5f) are formed at different positions in the axial direction at different positions in the circumferential direction from the recess 4, and the width of the recess 5 is grasped. The shape gradually decreases from the front end 3a toward the rear end 3b. The recesses 4 and 5 are formed point-symmetrically with respect to a point T on the axis J of the shaft cylinder body.

  By forming a plurality of recesses 4 and 5 in a discontinuous and axial direction on the circumference, the grip member bends inward at the portion where the recesses 4 and 5 are formed in the grip portion 3 to obtain a soft grip feel. The grip feeling can be changed depending on the shape of the recesses 4 and 5.

  Specifically, in the axial direction, with the pressing force in the same direction (the direction of arrow P in FIG. 1), the amount of bending of the grip member gradually increases from the concave portion 4a having a small width toward the concave portion 4f having a large width. Depending on the difference in the amount of bending, it is possible to obtain different types of grip feelings from a hard grip feel to a soft grip feel.

  Further, by forming the concave portion 5 at a position different from the concave portion 4 in the circumferential direction and making the shape different from that of the concave portion 4, as shown in FIG. It is possible to obtain a feel, a grip feeling that is slightly softer in the direction of the arrow P than in the direction of the arrow R, and a grip feel that is harder in the directions of the other arrows Q and S than in the directions of the arrows P and R. A plurality of grip feelings can be obtained depending on the circumferential direction.

  Further, by making the recesses 4 and 5 point-symmetric with respect to the point T on the axial center of the shaft cylinder main body, the decorative effect is improved, and for example, in the front end portion and the rear end portion of the gripping portion, the axial direction Even if they are different, it is preferable because substantially the same grip feel can be obtained by changing the circumferential direction.

  In the present invention, since the transparent or translucent grip member is mounted, the concave portion can be visually recognized from the outside by the shadow, so that compared to the case where the common concave portion is formed, the axially adjacent one and It is preferable because the decorative effect can be improved by the difference in shape between the recesses.

  Further, by adopting a structure in which the width of the recesses 4 and 5 is enlarged or reduced from the front end side to the rear end side of the shaft cylinder, the gripping portion is moved by moving from the front end 3a side to the rear end 3b side. The touch can be sequentially changed from a soft touch to a hard touch, or from a hard touch to a soft touch.

  In the present embodiment, for the sake of convenience, the concave portion is formed on the outer wall of the grip portion, but the concave portion may be formed on the inner wall of the grip member. In the present embodiment, a writing body is not shown, but when used as a writing instrument, a writing body such as a ballpoint pen refill is disposed in the shaft tube. Although not shown, it is preferable to make the concave portion a character or a figure because a decorative effect can be further obtained.

  In addition, the shape of the recess is not particularly limited as long as the shape is different between one and / or both recesses adjacent in the axial direction, and the longitudinal cross-sectional shape and / or the cross-sectional shape of the recess, for example, the recess The shape of the recess may be changed by changing the depth in the axial direction.

  A cap type, knock type, etc. can be widely implemented as a writing cylinder, and can be implemented without being limited to the type of ink, such as a ballpoint pen or applicator.

It is the longitudinal cross-sectional view which abbreviate | omitted one part which shows the axial cylinder of the writing instrument of Example 1. FIG. FIG. 2 is an external view of the shaft cylinder main body partially omitted from FIG. FIG. 2 is an external view in which a part of a shaft cylinder main body is omitted from the R direction in FIG. 1. It is an AA expanded sectional view in FIG. It is BB expanded sectional drawing in FIG. It is CC sectional drawing in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Shaft cylinder of writing instrument 2 Shaft cylinder main body 3 Grasping part 4, 5 Concave part 6 Clip member 7 Base 8 Male thread part 9 Female thread part

Claims (4)

A shaft cylinder of a writing instrument in which a grip portion having a diameter smaller than the outer diameter of another shaft tube is formed in the shaft tube main body, and a transparent or translucent grip member made of a soft material is attached to the grip portion, The inner wall of the grip member and / or the outer wall of the grip portion are formed with a plurality of non-continuous recesses on the circumference at different positions in the axial direction, and the recesses are adjacent to each other in the axial direction and / or A shaft of a writing instrument, characterized in that the shape is different between both recesses. 2. The writing instrument according to claim 1, wherein the recesses are formed at different positions in the circumferential direction, and the recesses are different in shape from one and / or both recesses adjacent in the axial direction. Shaft cylinder. The shaft cylinder of a writing instrument according to claim 1 or 2, wherein the recess is formed symmetrically with respect to a point on the axis of the shaft cylinder body. The shaft cylinder of a writing instrument according to any one of claims 1 to 3, wherein the recess is a character and / or a figure.

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