JP2007144702A - 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 a difference in the feel of holding without changing a distance from a writing tip at which the position of holding of the writing implement is located, by a simple structure. <P>SOLUTION: In the shaft tube of the writing implement having 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 grip member formed of a soft material is fitted on the holding part, recesses are formed incontinuously in the circumferential direction and at different positions in the circumferential direction on the inner wall of the grip member or on the outer wall of the holding part, and also the recesses are different in shapes from those on one side and/or on both sides thereof provided adjacently thereto in the circumferential 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 the shaft of such a writing instrument, a plurality of annular protrusions are provided on the outer surface of the grip member on the “shaft” of JP-A-2005-41040, and the width of the annular protrusion and / or the width of the annular groove are made different. A shaft cylinder of a writing instrument that has a good grip feeling of the grip member is disclosed.

Japanese Utility Model Laid-Open No. 7-15373 “shaft grip” has a structure in which a gap is formed between the grip member and the shaft tube so that the grip member bends inward when gripped. A shaft of a writing instrument is disclosed.
"Japanese Patent Laid-Open No. 2005-41040" “Japanese Utility Model Publication No. 7-15373”

  Certainly, it is possible to change the grip feeling by deforming the grip member by the gripping force when the thumb and / or the middle finger abut when gripping. However, there are various preferences for users, such as those who prefer a hard grip feel and those who prefer a soft grip feel.

  By the way, the position where the writing instrument is gripped is determined by the distance between the person gripping the tip end side of the grip member, the person gripping the rear end side of the grip member and the tip end of the grip member. Depending on the type, there are currently different preferences depending on the person.

  In Patent Documents 1 and 2 described above, although depending on the gripping force, the amount of bending of the grip is substantially determined by the distance from the writing tip, and as a result, the grip feeling is also determined. Therefore, in order to change the grip feeling, it is necessary to change the position (distance from the writing tip) for holding the writing instrument.

  An object of the present invention is to provide an axial tube of a writing instrument that can obtain a difference in grip feeling without changing the distance from the writing tip, which is a position for gripping the writing instrument, with a simple structure.

  The present invention relates to 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 grip member made of a soft material is attached to the grip portion. In the outer wall of the gripping part or the outer wall of the gripping part, a concave part is formed at a position discontinuous in the circumferential direction and different in the circumferential direction, and the concave part is adjacent to one and / or both concave parts in the circumferential direction. The shape is different.

  The grip member may be transparent or translucent.

  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.

  It has been possible to provide a writing instrument shaft tube with a simple structure that can obtain a difference in grip feeling without changing the distance from the writing tip, which is a position for gripping the writing instrument.

  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 of Example 1 shown in FIGS. 1 to 4 is formed with a grip portion 3 having a smaller diameter than the outer diameter of another shaft tube body 2 in the shaft tube body 2, and the grip portion 3 is translucent. A cylindrical grip member 5 made of silicone is attached to obtain a writing cylinder 1. Further, a female screw portion 8 of the base 6 is detachably screwed to a male screw portion 7 formed at the tip of the shaft cylinder main body 2.

  The small-diameter gripping portion 13 is formed with two groove-shaped concave portions 4a and 4b that are discontinuous on the circumference and extend in the axial direction in the circumferential direction. The recesses 4a and 4b have different shapes depending on the width of the recesses. Specifically, the width M1 of the other recess 4b is made larger than the width L1 of one recess 4a. (L1 <M1)

  By forming groove-shaped recesses 4a and 4b which are discontinuous and extend in the axial direction on the circumference of the grip portion 3, from the grip portion front end 3a side to the rear end 3b side, the same direction, for example, an arrow in FIG. The grip feeling in the P direction can be made the same.

  In addition, as shown in FIG. 4, the shape of the recess is discontinuous on the circumference and adjacent to the recess in the circumferential direction, so that the grip member has a large amount of bending in the direction of arrow P, and a soft grip feel can be obtained. In the direction of arrow R, the amount of bending is slightly softer than in the direction of arrow P, and in the directions of other arrows Q and S, it is possible to obtain a feeling of gripping that is harder than in the directions of arrows P and R. Multiple grip feels can be obtained. (Grip member deflection, P> R> Q = S)

  The shaft cylinder 11 of the writing instrument of Example 2 shown in FIGS. 5 to 8 is formed with a grip portion 13 having a smaller diameter than the outer diameter of the other cylinder body in the shaft cylinder body 12 in the same manner as in Example 1. A cylindrical grip member 15 made of translucent silicone is attached to the gripping portion 13 to obtain a writing cylinder 11. Further, a female screw portion 18 of the base 16 is detachably screwed to a male screw portion 17 formed at the tip of the shaft cylinder main body 12.

  The small-diameter gripping portion 13 is formed with two groove-shaped concave portions 14a and 14b that are discontinuous on the circumference and extend in the axial direction in the circumferential direction. The recesses 14a and 14b have the same width (L2 = M2) and have different shapes depending on the depth of the recesses. Specifically, the width n of the other recess 4b is made smaller than the depth width N of the one recess 14a. (N> n)

  As shown in FIG. 8, the amount of deflection of the grip member inward in the direction of the arrow P as shown in FIG. 8 is different from the shape of the recesses that are discontinuous on the circumference and adjacent to each other in the circumferential direction. Many soft grip feelings, and in the direction of arrow R, the amount of bending of the grip member is smaller than in the direction of arrow P. A plurality of grip feelings can be obtained depending on the rotation direction. (Grip member deflection, P> R> Q = S)

  The shaft cylinder 21 of the writing instrument according to the third embodiment shown in FIGS. 9 to 13 is formed by forming a grip portion 23 having a smaller diameter than the outer diameter of the other cylinder main body in the shaft cylinder main body 22 as in the first and second embodiments. A cylindrical grip member 25 made of translucent silicone is attached to the grip portion 23 to obtain a shaft cylinder 21 of a writing instrument. In addition, a female screw portion 28 of a base 26 is detachably screwed to a male screw portion 27 formed at the distal end portion of the shaft tube main body 22.

  The small-diameter gripping portion 23 is formed with two groove-like recesses 24a and 24b that are discontinuous on the circumference and extend in the axial direction in the circumferential direction. The concave portion 24a is formed such that the width of the concave portion gradually increases (L2 <L3) from the gripping portion front end 23a toward the central portion of the gripping portion 23, and gradually increases from the center of the gripping portion 23 toward the gripping portion rear end 23b. The width is reduced (L3> L4). Further, the recess 24b is formed such that the width of the recess 24b is gradually reduced (M2> M3) from the gripping portion front end 23a toward the center of the gripping portion 23, and from the center of the gripping portion 23 to the gripping portion rear end 23b. The width is gradually increased (M3 <M4).

  As shown in FIG. 12, the shape of the recesses 24a and 24b that are discontinuous on the circumference and adjacent to each other in the circumferential direction are different, as shown in FIG. At the end, in the direction of arrow R, the grip member 25 has a large amount of bending inward and a soft grip feeling, and in the direction of arrow P, the amount of bending of the grip member 25 is smaller than in the direction of arrow R, so a slightly soft grip feeling, arrow Q In the S direction, it is possible to obtain a grip feeling harder than in the directions of the arrows P and R, and a plurality of grip feelings can be obtained depending on the rotation direction. (Grip member deflection, R> P> Q = S)

  In addition, each of the recesses 24a and 24b has a substantially target shape with the central portion of the gripping portion 23 as a reference, and the shapes of the recesses 24a and 24b are also substantially target shapes. In the direction of the arrow P, the grip member is bent inward in the direction of the arrow P, and the gripping feeling is soft. In the direction of the arrow R, the amount of bending of the grip member is smaller than that in the direction of the arrow P. In the S direction, the grip feel is harder than in the directions of the arrows P and R, and a plurality of grip feels can be obtained depending on the rotation direction, and the grip part 23 has a substantially equivalent grip feel at the front end portion, the central portion, and the rear end portion. Can be obtained. (Grip member deflection, P> R> Q = S)

  In the present embodiment, for the sake of convenience, a writing body is not shown, but when used as a writing instrument, a writing body such as a ballpoint pen refill is provided in the shaft cylinder.

  Further, the shape of the recess is not particularly limited as long as a plurality of recesses are formed at different positions in the circumferential direction and the shape is different between one and / or both of the recesses adjacent in the circumferential direction. By making the grip member transparent or semi-transparent and making the shape of the concave portion a character or a figure, it is preferable from the appearance that the concave portion is shaded and a decorative effect can be obtained.

  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 the longitudinal cross-sectional view which abbreviate | omitted one part which shows the axial cylinder of the writing instrument of Example 2. FIG. FIG. 6 is an external view in which a part of the shaft cylinder body is omitted from the P direction in FIG. 5. FIG. 6 is an external view in which a part of the shaft cylinder main body is omitted from the R direction in FIG. 5. It is BB expanded sectional drawing in FIG. It is the longitudinal cross-sectional view which abbreviate | omitted one part which shows the axial cylinder of the writing instrument of Example 2. FIG. FIG. 10 is an external view of the shaft cylinder main body partially omitted from the P direction in FIG. 9. FIG. 10 is an external view in which a part of the shaft cylinder main body is omitted from the R direction in FIG. 9. FIG. 10 is an enlarged cross-sectional view taken along the line CC in FIG. 9. It is DD expanded sectional drawing in FIG.

Explanation of symbols

1, 11, 21 Shaft cylinder of writing instrument 2, 12, 22 Shaft cylinder body 3, 13, 23 Grasping part 4a, 4b, 14a, 14b, 24a, 24b Recessed part 5, 15, 25 Clip member 6, 16, 26 Cap 7 , 17, 27 Male thread part 8, 18, 28 Female thread part

Claims (3)

In 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 grip member made of a soft material is attached to the grip portion, the inner wall or grip of the grip member A recess is formed on the outer wall of the part in a circumferential direction that is discontinuous and at a different position in the circumferential direction, and the shape of the recess is different between one and / or both of the recesses adjacent in the circumferential direction. A writing instrument shaft. The shaft cylinder of the writing instrument according to claim 1, wherein the grip member is made of transparent or translucent. The shaft cylinder of a writing instrument according to claim 2, wherein the recess is a character and / or a figure.

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