JP2013001011A - Shaft tube of writing utensil - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a writing utensil having a simple structure which is easy to assemble and has a grip that can be changed by a user according to user's taste.SOLUTION: A shaft tube of the writing utensil includes a grip portion configured with a double structure grip composed of an inner grip made of a soft material and an outer grip made of a soft material covering the inner grip. The inner grip consists of a plurality of grip pieces that are fitted to and removed from the grip portion freely. The plurality of grip pieces are fitted at the outside of the grip portion such that individual grip pieces rotate freely relative to the grip portion.

Description

  The present invention relates to an axial tube of a writing instrument in which a grip is provided in a grip portion of the writing instrument.

  2. Description of the Related Art Conventionally, a writing instrument shaft tube in which a grip is disposed in a gripping part of a writing instrument is well known. In such a writing tool shaft, the present applicant has disclosed a writing tool shaft tube in which a grip has a two-layer structure of an inner layer and an outer layer in Japanese Patent No. 4602250, “Shaft Tool Shaft”.

  By the way, there are various user preferences such as desired color, shape, ball diameter, etc. In order to answer such user requests, it is necessary to prepare multiple types of writing colors and shaft tube colors even in the same form. is there. In particular, in recent years, a writing instrument that can be changed by a user according to his / her preference is also disclosed depending on parts.

  Similarly, in the writing tool shaft, Japanese Utility Model Publication No. 6-50884 “Shaft tube in writing tool” discloses a writing tool in which a plurality of grip bodies having different outer surface treatments are detachably arranged in accordance with the user's preference. ing.

Japanese Patent No. 4602250 Japanese Utility Model Publication No. 6-50884

  However, if a plurality of grip bodies such as Patent Document 2 are simply detachably disposed, if the grip is directly gripped during writing or the like, the grip body may be inadvertently rotated due to writing pressure or the like. In view of these problems, it is conceivable to increase the mounting force between the grip and the gripping portion of the shaft tube and to provide a rotation prevention mechanism so as not to rotate easily.

  The present invention has been made in view of these prior arts, and it is an object of the present invention to provide a writing instrument having a simple structure that has a good assembling property and has a grip that can be changed according to user's preference.

  In order to solve the above-mentioned problem, the present invention is arranged such that a grip composed of a two-layer structure of an inner grip made of a soft material and an outer grip made of a soft material covering the inner grip is disposed on the grip portion of the writing instrument. In the writing instrument shaft, the inner grip includes a plurality of grip bodies that are detachably disposed on the grip portion, and the plurality of grip bodies are individually rotatable with respect to the grip portion. It is characterized by being externally fitted.

  Further, the grip body is characterized by chamfering the outer edge portions of the front end surface and the rear end surface.

  Furthermore, the other grip adjacent to the front of the one grip body, wherein one grip body located at the rear end of the grip portion of the plurality of grip bodies is externally fitted to the grip portion by press-fitting. A body is press-fitted or loosely fitted into the grip portion, and the other grip body is externally fitted to be rotatable with a smaller rotational force than the one grip body.

  The outer grip is detachably and rotatably fitted to the grip portion, and the outer diameters of the plurality of inner grips are smaller than the inner diameters of the opposing outer grips. .

  According to the configuration of claim 1 of the present invention, a grip composed of a two-layer structure of an inner grip made of a soft material and an outer grip made of a soft material covering the inner grip is arranged in the grip portion of the writing instrument. In the writing instrument shaft, the inner grip includes a plurality of grip bodies that are detachably disposed on the grip portion, and the plurality of grip bodies are individually rotatable with respect to the grip portion. Therefore, the user can easily place the plurality of grip bodies on the grip portion, and can prevent the grip bodies from being twisted during placement.

  In addition, for example, when the grip body is decorated with letters, patterns, etc., and the inner grip is in one form, the user does not care about the position in the rotation direction, and the grip body is gripped by the shaft tube. After the outer fitting to the part, the grip body can be rotated to a desired position in a stable state.

  According to the configuration of claim 2 of the present invention, since the grip body is chamfered on the outer edge of the front end surface and the rear end surface, even if the grip bodies contact each other, Since the contact area can be reduced, the rotation resistance can be reduced as a result.

  The chamfering shape to be applied to the grip body is not particularly limited, such as C chamfering and R chamfering. However, by adopting R chamfering, even if the end surfaces of the gripping body are deformed and contacted, the resistance force is easily dispersed and the grip R chamfering is preferred because it is difficult to inhibit the rotation of the body.

  According to the configuration of claim 3 of the present invention, one grip body located at the rearmost side of the grip portion of the plurality of grip bodies is disposed by press-fitting into the grip portion, and the one grip The other grip body adjacent in front of the body is press-fitted or loosely fitted into the grip portion, and the other grip body is fitted so that the other grip body can rotate with a smaller rotational force than the one grip body. Thus, after the rearmost grip body is disposed, the other grip body can be externally fitted and only the other grip body can be easily rotated.

  According to the configuration of claim 4 of the present invention, the outer grip is detachably and rotatably fitted to the grip portion so that the outer grip and the inner grip are mutually attached to the grip portion of the shaft tube. This is preferable because it can be rotated and, for example, a character or pattern provided on the outer grip and a decoration such as a character or pattern provided on the inner grip can form one form. In addition, since the outer diameters of the plurality of grip bodies are smaller than the inner diameters of the opposing outer grips, when the outer grips are rotated, the inner grips are difficult to rotate. can do.

  The soft material of the present invention includes a rubber elastically deformable silicone rubber, natural rubber, butyl rubber, fluorine rubber, vinyl chloride resin, butadiene rubber, urethane rubber, polyethylene resin, other synthetic rubber, thermoplastic elastomer, etc. The inner grip and the outer grip may be formed of the same type or different types.

  In the present invention, since the inner grip can be visually recognized from the outside by disposing the transparent or translucent outer grip, compared with the case where the inner grip having the common outer shape and / or color pattern is disposed, At least, the decorative effect can be improved by changing the outer shape and / or the color pattern of the inner grip adjacent in the axial direction, which is preferable. If the outer grip is formed of a transparent or translucent soft material and the inner grip is formed of a transparent or translucent soft material, the gripping portion of the shaft tube can be seen through, and a new appearance can be expressed.

Further, in the present invention, in order to rotatably fit the plurality of inner grips to the grip portion of the shaft tube, the inner diameter of the inner grip is preferably larger than the outer diameter of the grip portion of the shaft tube. However, you may arrange | position by press-fitting in the holding part of a shaft cylinder. However, in order to allow the user to easily rotate, the force required to rotate the grip body is preferably 300 gf · cm or less, more preferably 250 gf · cm or less. The force for rotating the grip body can be measured using a torque meter manufactured by Tohnichi Corporation.

  In addition, the plurality of grip bodies may be a plurality of grip bodies having the same shape or different outer shapes, but it is preferable to form one form or pattern by arranging the grip bodies in series.

  The object of the present invention is to provide a writing instrument with a simple structure that has a good assembly and a grip that can be changed by the user according to preference.

FIG. 3 is an external view showing a shaft tube of the writing instrument of Example 1. It is a principal part expanded sectional view in which a part was omitted in FIG. It is the figure made into the partial cross section which shows the state which removed the inner grip and the outer grip in FIG. It is a figure which shows the arrangement | positioning state of the inner grip and outer grip in FIG. It is AA sectional drawing in FIG.

  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 embodiments.

Example 1
The shaft cylinder 1 of the writing instrument of the first embodiment shown in FIGS. 1 to 5 can be expanded by dividing the head into a plurality of parts within a shaft cylinder body obtained by screwing the front shaft 2 and the rear shaft 3. The formed chuck 10, the fastening ring 11 that is externally fitted to the head of the chuck 10, the pipe-shaped core tank 12 that is press-fitted and fixed to the rear part of the chuck 10, the washer 13 that receives the fastening ring 11, the washer 13, and the core tank The mechanism part which consists of the spring 14 stretched between 12 comprises, and the shaft cylinder main body is shaken to a longitudinal direction, and the gravity of the weight body 13 acts to the front-end | tip opening part direction of the front shaft 2, or the rear shaft 3 This is a mechanical pencil barrel that allows a lead core (not shown) to be drawn out by pressing the knock body 8 projecting from. An outer cylinder 4 is disposed on the rear shaft 3, and a rotation stopper 9 is formed on the outer cylinder 4.

  The front shaft 2 has a grip portion 2a having a small diameter. The grip portion 2a has a cylindrical shape made of silicone rubber colored in different colors, and has the same shape and grip bodies of different colors of blue, yellow, and red. 7 a, 7 b, 7 c are arranged in series, and the inner grip 7 is externally fitted to the grip portion 2 a of the front shaft 2, and a semi-transparent silicone rubber is formed outside the inner grip 7. The outer grip 6 is also rotatably fitted to the grip portion 2a of the front shaft 2, and the outer grip 6 and the inner grip 7 are laminated. In addition, the external thread 6 and the internal grip 7 are disposed on the grip 2a of the front shaft 2 by detachably attaching the female thread of the base 5 to the external thread 2b formed at the tip of the front shaft 2. A shaft cylinder 1 is obtained. Further, by arranging three grip bodies 7a, 7b, 7c in series, one pattern is formed in which display portions provided on the outer surfaces of the grip bodies 7a, 7b, 7c are continuous.

  Specifically, the small-diameter gripping portion 2a is formed in a tapered shape that increases the rear end outer diameter H with respect to the front end outer diameter G and increases the diameter toward the rear, and includes a plurality of grip bodies 7a, The inner diameter L of 7b, 7c is substantially the same from the front end to the rear end. The grip bodies 7a, 7b, and 7c have an R-shaped chamfered portion R1 at the outer edge of one end surface and the other end surface, and an R-shaped chamfered portion at the inner edge at the other end surface. R2 is provided to further reduce the rotational resistance.

  Further, since the inner diameter L of the grip bodies 7a, 7b, 7c is smaller than the outer diameter H of the rear end portion of the grip portion 2a, one grip body 7c located at the rear end is press-fitted into the grip portion 2a. It is fitted by. Further, since the inner diameter L of the other grip body 7b adjacent to the front side of the one grip body 7c is larger than the outer diameter of the gripping portion 2a of the opposing shaft cylinder, it is not press-fitted into the gripping portion 2a. It is fitted externally. Further, the other grip body 7a adjacent to the front side of the other grip body 7b is not press-fitted into the gripping portion 2a of the shaft tube and is externally fitted in a loose fit like the other grip body 7b.

  When one grip body 7c is disposed and fitted from the front of the grip portion 2a, the one grip body 7c can be smoothly fitted to the tip and the center of the grip portion 2a, and the rear of the grip portion 2a. It is press-fitted at the end and is externally fitted rotatably.

  Further, since the inner diameter L of the other grip body 7b is larger than the outer diameter of the gripping portion 2a of the opposite shaft cylinder, the outer gripping portion 2a is rotatably fitted to the gripping portion 2a of the shaft cylinder. It is. Therefore, the other grip body 7b externally fitted in a loose fit can be rotated with a smaller rotational force than the one grip body 7c externally fitted by press-fitting, and only the other grip body 7b can be easily rotated. it can.

  The force required for the rotation of the grip body is 230 gf · cm for one grip body 7c, and 100 gf · cm because the other grip body 7b and the other grip body 7a are loosely fitted. The grip body 7a and the gripping portion 2a are in contact with each other at the time of rotation because the other grip body 7a has a larger gap with the gripping portion 2a of the shaft cylinder than the grip body 7b. It is difficult to rotate than the other grip body 7b.

  Further, when the base 5 is screwed, the outer grip 6 is sandwiched between the rear end of the base 5 and the outer stage 2 c of the front shaft 2, and the other grip body 7 a which is the foremost is held by the inner flange 6 a of the outer grip 6. The outer grip 6 is compressed and sandwiched with the rear end surface of one grip body 7c in contact with the outer stage 2c of the front shaft 2 in contact with the outer end 2c of the front shaft 2. For example, the inner grip 7 and the outer grip 6 are prevented from rotating carelessly.

  In order to rotate or replace the inner grip 7, the outer grip 6 is removed after the base 5 is removed. In this state, the desired one grip body 7a, the other grip body 7b, or the other grip body 7c is rotated. Alternatively, the inner grip 7 can be removed and replaced with a new one or a new grip body (not shown).

  Also, before the base 5 is screwed, the outer grip 6 can be rotatably fitted on the front shaft 2 to enhance the decorative effect with the inner grip 7. In addition, since the outer grip 6 is fitted after the inner grip 7 is fitted, the outer grip 6 is configured such that the outer diameter M of the plurality of inner grips 7 is smaller than the inner diameter N of the opposing outer grip 6. It is preferable that the inner grip 7 is difficult to rotate when rotating.

  Furthermore, the inner surface of the outer grip 6 is formed in a taper shape that increases in diameter toward the outside, and the outer surface of the inner grip 7 is formed into a slate shape having a substantially constant outer diameter. The gap with the outer surface becomes non-uniform in the longitudinal direction, and the grip feeling can be changed by the difference in the longitudinal direction.

  In the above embodiment, the inner grip 7 has a cylindrical shape, but various shapes are conceivable, such as a triangular cross-sectional shape and an arbitrarily changed thickness. Furthermore, a plurality of protrusions may be formed on the outer surface of the inner grip of the present invention. Moreover, the number of grip bodies is not limited to three, and can be selected and used as appropriate, such as two or four.

  Furthermore, it is conceivable that the grip body has a hardness (JIS A) 10, 30, 50, 70, etc., and a plurality of the same hardness or a combination of different hardnesses to form an inner grip. As the outer grip to be combined with these inner grips, various soft grips such as hardness (JIS A) 10, 30, 50, 70, etc., the same hardness as the inner grip, or a combination of different hardnesses are used. It becomes possible.

  Further, in this embodiment, for convenience, one grip body which is the rearmost is disposed in the grip portion of the shaft cylinder by press-fitting, and the other grip body adjacent in front of the grip body is externally fitted in a loose fit. As long as the other grip body can be rotated with a small rotational force as compared with the rearmost grip body, the grip body may be disposed by weak press-fitting as compared with the rearmost grip body. Furthermore, it is most preferable that the other grip body adjacent in front of the other grip body can be rotated with a smaller rotational force.

  Further, in this embodiment, when the base is attached, the outer grip that is rotatably fitted is compressed by the outer end of the base and the outer stage of the front shaft, and the outer grip is easily rotated. However, the outer grip may be easily rotatable after the base is mounted.

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

DESCRIPTION OF SYMBOLS 1 Writing instrument shaft 2 Front shaft 3 Rear shaft 4 Rear shaft 5 Base 6 Outer grip 7 Inner grip 7a, 7b, 7c Grip body

Claims (4)

In a writing instrument shaft cylinder in which a grip composed of a two-layer structure of an inner grip made of a soft material and an outer grip made of a soft material covering the inner grip is disposed in a grip portion of the writing tool, the inner grip is A writing instrument comprising a plurality of grip bodies detachably arranged on the gripping portion, and the plurality of grip bodies are individually rotatably fitted to the gripping portion. Shaft cylinder. 2. The shaft cylinder of a writing instrument according to claim 1, wherein the grip body is chamfered at outer edge portions of a front end surface and a rear end surface. One grip body located at the end of the grip portion of the plurality of grip bodies is externally fitted to the grip portion by press-fitting, and the other grip body adjacent to the front of the one grip body is 3. The outer gripping part is press-fitted or loosely fitted into the grip part, and the other grip body is externally fitted so as to be rotatable with a smaller rotational force than the one grip body. The writing tube of the writing instrument described in 1. The outer grip is detachably and rotatably fitted to the grip portion, and the outer diameters of the plurality of inner grips are smaller than the inner diameters of the opposing outer grips. The shaft cylinder of the writing instrument according to any one of 1 to 3.

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