JP2010125667A - Shaft body - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that a gripping part constituted so that a flexible material, a gelatinous substance and a gas are sealed optionally deforms thereby is not sturdy and too soft and gives poor writing feeling, and even if a sturdy gripping part having fine solid bodies arranged in the space is employed, further improvement is still required to satisfy personal favorite touch feeling. <P>SOLUTION: In the shaft body in which the gripping part is arranged and/or formed integrally, fine solid bodies and a viscous substance are arranged in the space provided between the shaft body and the gripping part and/or inside the gripping part and/or between the inner layer and the outer layer. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a shaft body provided with a grip portion. Examples of the shaft body include writing tools such as ballpoint pens and mechanical pencils, elongated containers such as lipsticks and eyeliners, tools such as fishing rods, door knobs, and drivers. Kind.

Various inventions have been made in order to provide the gripping portion with effects such as slip prevention and ease of gripping. As a non-slip material, a structure (grip) in which an elastic resin such as silicone or elastomer is arranged in the gripping part is adopted, and a flexible material, gel-like substance, gas, or fine solid is enclosed inside the gripping part. The grip part that is easy to hold is formed.
Japanese Patent No. 3431317 JP 2004-291612 A

  However, there is a drawback in that the gripping portion in which a flexible material, gel-like substance, or gas is sealed is arbitrarily deformed, so that it is not soft and is too soft. Moreover, even when a fine solid is disposed in the space and the gripping portion has a waist, there remains room for further improvement in deformability and shape retention.

  Accordingly, the present invention provides a shaft body in which at least an elastic resin is disposed and / or integrally provided in the grip portion of the shaft body, and a space is provided between the shaft body and the grip portion, and a fine solid and A shaft body characterized in that a sticky substance is arranged and the size of the fine solid is made smaller than the minimum width of the space is a first gist, and a space is formed inside the gripping portion. A second feature is a shaft body characterized in that a fine solid and an adhesive substance are arranged in this space, and the size of the fine solid is made smaller than the minimum width of the space. The gripping portion is provided with a space inside by providing at least an inner layer and an outer layer, a fine solid and a sticky substance are arranged in the space, and the size of the fine solid is determined by the minimum width of the space. The third gist is to make it smaller than

  The shaft body material may be any material that can form metal, resin, wood, stone, etc. If the material forming the gripping part has the strength to form the shaft body, the gripping part is made of that material. It can be formed in itself and is not particularly limited. These materials may be one kind or a mixture of two or more kinds.

  Resin and / or elastic resin can be used as the material of the shaft body and / or the grip portion. As the resin, polyvinyl chloride (PVC), polyvinylidene chloride (PVDC), polyethylene resin (PE), polypropylene resin (PP), polystyrene resin (PS), acrylonitrile styrene resin (AS), acrylonitrile styrene butadiene resin (ABS), Methacrylic resin (PMMA), polyacetal resin (POM), polyamide resin (PA), polycarbonate resin (PC), polyethylene terephthalate resin (PET), tetrafluoroethylene resin (PTFE), acrylic resin and silicone resin as elastic resin , Fluorine resin, vinyl chloride, urethane resin, polyurethane resin, polyethylene resin, elastomer gel, polyethylene gel, dimethyl silicone, methyl vinyl silicone, methyl phenyl vinyl silicone , Methyl fluoroalkyl silicone (fluorosilicone), fluoro-dimethyl copolymer silicone, urethane rubber, ethylene acrylic rubber, epichlorohydrin rubber, acrylic rubber, ethylene propylene rubber, chloroprene rubber, natural rubber, isoprene rubber, chlorinated polyethylene, nitrile rubber , Styrene elastomers, olefin elastomers, ester elastomers, urethane elastomers and the like, but are not particularly limited as long as the shape can be maintained. These resins and / or elastic resins may be one kind or a mixture of two or more kinds. In addition, it is possible to improve the anti-slip effect and the grip feeling by molding and painting an elastic resin on the surface of the grip portion formed of resin.

  The hardness of the elastic resin constituting the gripping portion may be appropriately selected within a hardness range of 0 to 90 degrees for Shore A or 0 to 90 degrees for Asker C, and is not particularly limited. In addition, the hardness and thickness of the outer layer greatly affect the feeling of touch. When the outer layer is formed of an elastic resin of 60 degrees with Shore A and 80 degrees or less with Asker C, the outer layer is soft, so that the amount of deformation when gripped is large and the deformability is improved, and the retention of the deformed shape is also improved. On the other hand, since it is difficult to return to the original shape, the shape recoverability is reduced. On the other hand, since the elastic resin of 60 degrees on Shore A and 80 degrees or more on Asker C is hard, the amount of deformation when gripped is reduced and the deformability and deformed shape retention are reduced. Shape recovery is improved. These deformability, deformed shape retainability, and shape recoverability include the elasticity of the elastic resin, the thickness of the outer layer, the size of the space provided inside the gripping part, the outer layer and the shaft, and / or the inner layer. It can be adjusted by the size of the space formed between the two. Further, the inner layer and the outer layer may be molded integrally with the same material or may be molded and assembled separately with materials having different hardness, and are not particularly limited.

  A substance having oil absorption and / or water absorption may be added to these resins and / or elastic resins. There are many types and shapes of oil-absorbing and / or water-absorbing substances, such as substances used in cosmetics, substances used for removing oil, and substances used for deodorization and cleaning in the home. is there. For example, natural materials such as wood, fiber, cork, charcoal and leather, adsorbent materials such as silica gel and activated carbon, inorganic minerals such as zeolite and diatomaceous earth, crosslinked polyacrylate, crosslinked polymethyl methacrylate, polyamide porous material Polymer oil absorbing / water absorbing agents such as spindle-shaped hollow porous silica, porous silica, porous silicone, calcium carbonate and magnesium carbonate, and porous ceramics. In addition, an oil absorbing property and / or a water absorbing function such as porous silica may be formed on the surface to exhibit and improve the oil absorbing property and / or water absorbing function of the substance. Inorganic minerals and inorganic compounds are particularly preferred because it is desirable that the size of these oil-absorbing and / or water-absorbing substances does not change upon oil absorption and / or water absorption. These oil-absorbing and / or water-absorbing substances may be one kind or a mixture of two or more kinds.

  A substance having oil absorption and / or water absorption is desirably added as fine particle powder in order to sufficiently exert its function. As the particle size is finer, the surface area per unit weight increases, so that an effect of increasing the absorption efficiency of oil and / or water can be expected. However, the particle size may be appropriately selected according to the shape and size of the gripping part. Further, by using an inorganic powder having oil absorption and / or water absorption, there is no change in volume even when oil and / or water is absorbed, and swelling and loosening of the gripping portion can be further prevented. The amount added to the resin may be appropriately selected according to the shape and size of the gripping part, but if the amount added is too small, a sufficient effect cannot be expected, and if it is too large, the strength is impaired. Therefore, it is desirable that the added amount is 0.001% to 50%, particularly 0.01% to 10% by weight. The addition amount to the elastic resin may be appropriately selected according to the shape and size of the gripping portion, but if the addition amount is too small, a sufficient effect cannot be expected, and if it is too large, the hardness of the elastic resin increases and elasticity is increased. Therefore, it is desirable that the addition amount is 0.001% to 50%, particularly 0.01% to 10% by weight with respect to the elastic resin.

These elastic resins provide powders, fine particles, and fine particles to improve functionality such as touch and fingertips, improved design such as coloring and patterns, antibacterial and sweat absorption and release, and self-cleaning by photocatalytic reactions. A foaming agent or the like may be included.
Specific examples of the powder include resin powder such as styrene, nylon, polyolefin, silicone, epoxy, polymethyl methacrylate, inorganic powder such as silica, alumina, zirconia, glass piece, metal piece, silk powder, Examples include powdered natural materials such as wood flour and cork flour. In addition, composite powders obtained by coating these powders with powder coatings such as acrylic, urethane, and epoxy resins, and resin powders using automatic mortars, ball mills, jet mills, atomizers, hybridizers, etc. Examples include those in which an inorganic powder smaller than the resin powder is adsorbed or driven into the body, and is not particularly limited. Further, the shape of the powder may be amorphous, spherical, plate-like, or needle-like, and is not particularly limited. These powders may be added alone or in combination.

  Specific examples of the fine particles include carbon black, graphite, oxides such as titanium oxide, tin oxide, and indium oxide, nitrides such as titanium nitride, chromium nitride, zirconium nitride, and tantalum nitride, titanium carbide, and zirconium carbide. , Carbides such as tantalum carbide, and borides such as titanium boride, zirconium boride, and tantalum boride. Further, the shape of the fine particles may be amorphous, scaly, spherical or fibrous. One kind or two or more kinds of these fine particles may be added.

As the foaming agent, a chemical foaming agent, a physical foaming agent, a thermally expandable microcapsule, or the like is used. Specific examples of the chemical foaming agent include organic pyrolytic foaming agents such as azo compounds, nitroso compounds, hydrazine derivatives, semicarbazide compounds, azide compounds, and triazole compounds, organic reactive foaming agents such as isocyanate compounds, bicarbonates, Examples thereof include inorganic pyrolytic foaming agents such as carbonates, sulfites and hydrides, and inorganic reactive foaming agents such as sodium bicarbonate + acid, hydrogen peroxide + yeast bacteria, zinc powder + acids, and the like.
Specific examples of the physical foaming agent include butane, pentane, hexane, dichloroethane, dichloromethane, chlorofluorocarbon, air, carbon dioxide gas, nitrogen gas and the like.
Specific examples of thermally expandable microcapsules are thermoplastics composed of copolymers of vinylidene chloride, acrylonitrile, acrylic acid esters, methacrylic acid esters, etc., with low-boiling hydrocarbons such as isobutane, pentane, petroleum ether, and hexane as the core material. A microcapsule using a resin as a wall material can be used and is not particularly limited. You may add these foaming agents 1 type, or 2 or more types.

  Further, the surface of the elastic resin constituting the grip portion can be formed into a smooth surface or a rough surface. To increase the frictional resistance and improve the fingertip surface catching, the surface should be smooth like a mirror surface. To reduce the frictional resistance and make it less susceptible to tactile sensation, dust and dirt, roughen the surface. Good. Furthermore, moderate unevenness may be formed on the surface of the elastic resin constituting the gripping portion.

  The gripping portion has a structure in which a space is provided between the shaft body and the gripping portion and / or inside the gripping portion and / or between the inner layer and the outer layer. Further, the inner layer and the outer layer may be integrated or separate, and a structure in which a part of the inner layer and the outer layer are connected may be used.

  Examples of the method for manufacturing the gripping portion include a method in which an elastic resin molded by a method such as compression molding, transfer molding, injection molding, extrusion molding, or vacuum casting is attached to a shaft body, or a method in which it is formed by insert molding. The manufacturing method is not particularly limited.

  The fine solid is disposed in a space provided between the shaft body and the grip portion and / or inside the grip portion and / or between the inner layer and the outer layer. Specific examples of fine solids include hard balls such as stainless steel, white and white, zirconia, and ruby balls, ores such as diamond, ruby, sapphire, agate, quartz, rocks such as granite and marble, polyethylene, polyethylene terephthalate, Resins such as vinyl chloride, ABS, AS, PMMA, polypropylene, polycarbonate, and foams thereof, acrylic resins, silicone resins, fluororesins, urethane resins, polyurethane resins, dimethyl silicones, methyl vinyl silicones, methyl phenyl vinyl silicones, Methyl fluoroalkyl silicone (fluoro silicone), fluoro-dimethyl copolymer silicone, urethane rubber, ethylene acrylic rubber, epichlorohydrin rubber, acrylic rubber, ethylene propylene rubber, chloroprene rubber, natural rubber Isoprene rubber, chlorinated polyethylene, nitrile rubber, styrene elastomer, olefin elastomer, ester elastomer, urethane elastomer and other elastic resins, nylon, silk, cotton and other fibers, etc. There is no particular limitation as long as it can be formed. These fine solids may be one kind or a mixture of two or more kinds.

  Various solid shapes such as particles, fibers, and irregular shapes can be used as fine solid shapes. When a fine solid having a shape close to a true sphere, such as a hard sphere or glass bead, is arranged, the deformation is fast when gripped, and the shape is restored quickly when released. When an irregularly shaped fine solid obtained by pulverizing rocks or glass is arranged, the gripping is slow, but there is a feeling of gripping, and the shape is remembered to some extent when released. The size of the fine solid is not particularly limited as long as it is smaller than the minimum width of the space provided between the shaft body and the grip portion and / or inside the grip portion.

  The space provided between the shaft body and the gripping part and / or the space inside the gripping part and / or between the inner layer and the outer layer assists the fluidity and shape retention of the fine solid in addition to the fine solid. In order to do so, a sticky substance is arranged. A sticky substance means that when a substance exists between at least two fine solids, if one fine solid is moved, the other fine solid also moves together. A substance that forms a dissociated state when pulled in another direction. The necessary tackiness differs depending on the size, weight, shape, and contact area of the fine solid, but the balance between deformability and shape retention can be adjusted by appropriately selecting the tack strength of the sticky substance. I can do it. Although the following are illustrated as a substance which has adhesiveness, it should just have the above characteristics, and is not specifically limited. Silicone oil such as KF96 (manufactured by Shin-Etsu Chemical Co., Ltd.), silicone oil compound such as tsk5370 (manufactured by Ge Toshiba Silicone Co., Ltd.), and petroleum grease such as Retinax Grease CL (manufactured by Showa Shell Sekiyu Co., Ltd.). GE-1052, sifel 827 (manufactured by Shin-Etsu Chemical Co., Ltd.), SE1885, Sylgard 527, CY52-286 (manufactured by Toray Dow Corning Co., Ltd.), Alpha Gel (manufactured by Geltech Co., Ltd.), WACKER Silgel 612 Examples include silicone gels (made by Asahi Kasei Wacker Silicone Co., Ltd.), urethane gels such as gels of human skin (made by Exeal Corporation), and synthetic rubbers such as Exgel (made by Kaji Co., Ltd.). In addition, these sticky substances may be one kind or a mixture of two or more kinds.

  A sticky substance is in a state of wrapping a plurality of fine solids, in a state of being about the same size as a fine solid and existing between fine solids, or in a liquid and attached state around a fine solid However, it may be arranged with a fine solid in a space provided between the shaft body and the gripping part and / or inside the gripping part and / or between the inner layer and the outer layer. Further, the gel-like substance is finely sheared by the movement of a fine solid and may change in size, but it is sufficient that the adhesiveness is maintained, and the size is not particularly limited.

  According to the present invention, a space is provided inside the gripping portion, and a gripping portion in which fine solids and sticky substances are disposed is disposed and / or integrally provided in this space, thereby deforming the gripping portion of the conventional elastic resin alone. The gripping portion improves the ability and has a lower waist than the gripping portion in which only a flexible material, a gel-like substance or gas is enclosed. When gripping, the gripping portion is deformed by moving a fine solid in the space according to the force of the fingertip. At this time, since a substance having adhesiveness is present, a slow deformation with a sense of resistance is caused at the time of deformation, and the position of a fine solid can be fixed after the deformation is completed, and the shape memory ability is exhibited.

  The present invention provides a fine solid and adhesive in a shaft body in which a space is provided inside the gripping portion, and a gripping portion in which a fine solid and a substance having adhesiveness are disposed is disposed and / or integrally provided in the space. The most important feature is to impart deformability and shape memory to the gripping part depending on the function of the substance. The grip part is deformed according to the shape of the gripped fingertip, and the purpose of improving the grip feeling is realized by holding the shape.

  FIG. 1 is a diagram of Example 1 in which the present invention is used for a grip portion of a writing instrument. 2 is a cross-sectional view taken along the line a-A ′ of FIG. FIG. 3 is a diagram in which FIG. 1 is deformed by gripping. A space was provided inside by providing an inner layer and an outer layer, and a fine solid and a sticky substance were arranged in this space. Reference numeral 1 is a shaft, reference numeral 2 is a gripping part, reference numeral 3 is an inner layer, reference numeral 4 is an outer layer, reference numeral 5 is a fine solid, and reference numeral 6 is a sticky substance.

  The shaft cylinder 1 was formed by injection molding using polyethylene and an elastomer (Actimer AE-2060S, manufactured by Riken Technos Co., Ltd., Shore A hardness: 60 °) as the grip portion 2. Between the inner layer and the outer layer, glass beads (Unibeads UB-2022L, manufactured by Union Co., Ltd.) as the fine solid 5 and silicone gel (KE-1052, manufactured by Shin-Etsu Chemical Co., Ltd.) as the sticky substance 6 are used. The grip portion 2 arranged in the space was attached to the shaft body 1. The silicone gel is arranged so as to fill the gap between the glass beads. One or more glass beads are aligned with respect to the radial cross section of the space, and the position is appropriately changed by the pressure when grasped. At this time, the silicone gel is deformed according to an external force while exhibiting a resistance feeling due to elasticity, and exhibits a shape retention ability due to adhesiveness after the deformation. Since the silicone gel is integrally arranged so as to fill the gaps between the glass beads, resistance to external force is large and deformation is difficult. In addition, since the outer layer is made of an elastic elastomer, two or more parts can be arranged or no part can be formed depending on the deformation, so that the grip part 2 is deformed into the shape of a grasped finger, and is easy to hold and slip. Demonstrate effects such as bitterness. The inner glass beads themselves are hard and elastic due to the silicone gel, so that they do not deform too much when grasped firmly, and a good feeling with a waist is obtained.

  FIG. 4 is a diagram of Example 2 in which the present invention is used for a grip portion of a writing instrument. FIG. 5 is a cross-sectional view taken along line a-A ′ of FIG. FIG. 6 is a diagram in which FIG. 4 is deformed by gripping. A space was provided inside by providing an inner layer and an outer layer, and a fine solid and a sticky substance were arranged in this space. Reference numeral 1 is a shaft, reference numeral 2 is a gripping part, reference numeral 3 is an inner layer, reference numeral 4 is an outer layer, reference numeral 5 is a fine solid, and reference numeral 6 is a sticky substance.

  The shaft cylinder 1 was formed by injection molding using polypropylene and an elastomer (Lavalon ME5302C, manufactured by Mitsubishi Chemical Corporation, Shore A hardness: 60 degrees) as the grip portion 2. Glass beads (Unibeads UB-1719LN, manufactured by Union Co., Ltd.) are arranged as fine solid 5 in the space between the inner layer and outer layer, and silicone gel (SE1885, manufactured by Toray Dow Corning Co., Ltd.) is filled in the gap. The grip portion 2 was attached to the shaft body 1. The silicone gel is arranged in a size that includes a plurality of glass beads. Two glass beads are aligned with respect to the radial cross section of the space, and the position is appropriately changed by the pressure when grasped. At this time, the silicone gel is deformed according to an external force while exhibiting a resistance feeling due to elasticity, and exhibits a shape retention ability due to adhesiveness after the deformation. Since the silicone gel is sized to include a plurality of glass beads, the resistance to external force is smaller than that in the case where the gel is integrated, and the silicone gel is easily deformed. In addition, since the outer layer is made of an elastic elastomer, two or more parts can be arranged or no part can be formed depending on the deformation, so that the grip part 2 is deformed into the shape of a grasped finger, and is easy to hold and slip. Demonstrate effects such as bitterness. Since the number of particles arranged on the cross section increases as the particle size decreases, it becomes possible to smoothly follow the gripped shape and deform. The inner glass beads themselves are hard and elastic due to the silicone gel, so that they do not deform too much when grasped firmly, and a good feeling with a waist is obtained.

  FIG. 7 is a diagram of Example 3 in which the present invention is used for a grip portion of a writing instrument. 8 is a cross-sectional view taken along the line a-A 'of FIG. FIG. 9 is a diagram in which FIG. 7 is deformed by gripping. A space was provided inside by providing an inner layer and an outer layer, and a fine solid and a sticky substance were arranged in this space. Reference numeral 1 is a shaft, reference numeral 2 is a gripping part, reference numeral 3 is an inner layer, reference numeral 4 is an outer layer, reference numeral 5 is a fine solid, and reference numeral 6 is a sticky substance.

  The shaft tube 1 was formed by injection molding using polypropylene and an elastomer (Lavalon ME6301C, manufactured by Mitsubishi Chemical Corporation, Shore A hardness: 60 degrees) as the grip portion 2. Glass beads (Unibeads UB-1416LN, manufactured by Union Co., Ltd.) as fine solid 5 are arranged in the space between the inner layer and outer layer, and silicone gel (CY52-286, manufactured by Toray Dow Corning Co., Ltd.) in the gap Is attached to the shaft body 1. After that, the silicone gel is finely sheared by repeatedly deforming the gripping part by applying external force such as partially pushing into the gripping part or rotating the gripping part together with the shaft cylinder in the pushed state, and glass with an unspecified shape. Arranged between the beads. However, each silicone gel has adhesiveness even in a sheared state. Three glass beads are arranged in the radial cross section of the space, and the position is appropriately changed by the pressure when grasped. At this time, the silicone gel is deformed according to an external force while exhibiting a resistance feeling due to elasticity, and exhibits a shape retention ability due to adhesiveness after the deformation. Silicone gel is finely sheared to a size that fits into the gap between the glass beads, and resistance to external force is smaller than when the gel is integrated and when the gel encloses a plurality of glass beads, and is easily deformed. In addition, since the outer layer is made of an elastic elastomer, there are five or more parts or parts that do not exist in accordance with the deformation, so that the grip part 2 is deformed into the shape of a grasped finger. Demonstrate effects such as bitterness. Since the number of particles arranged on the cross section increases as the particle size decreases, it becomes possible to smoothly follow the gripped shape and deform. The inner glass beads themselves are hard and elastic due to the silicone gel, so that they do not deform too much when grasped firmly, and a good feeling with a waist is obtained.

  FIG. 10 is a diagram of Example 4 in which the present invention is used for a grip portion of a writing instrument. 11 is a cross-sectional view taken along the line a-A ′ of FIG. FIG. 12 is a diagram in which FIG. 10 is deformed by gripping. A space was provided inside by providing an inner layer and an outer layer, and a fine solid and a sticky substance were arranged in this space. Reference numeral 1 is a shaft, reference numeral 2 is a gripping part, reference numeral 3 is an inner layer, reference numeral 4 is an outer layer, reference numeral 5 is a fine solid, and reference numeral 6 is a sticky substance.

The shaft tube 1 was formed by injection molding using polypropylene and an elastomer (Lavalon ME6301C, manufactured by Mitsubishi Chemical Corporation, Shore A hardness: 60 degrees) as the grip portion 2. Glass beads (Unibead UB-1416LN, manufactured by Union Co., Ltd.) are arranged as a fine solid 5 in the space between the inner layer and the outer layer, and silicone gel (CY52-286, manufactured by Toray Dow Corning Co., Ltd.) in the gap Is attached to the shaft body 1. After that, the silicone gel is finely sheared by repeating the deformation of the gripping part by applying external force such as partially pushing into the gripping part or rotating the gripping part together with the barrel in the pushed state, and the glass beads are in a liquid state. It is arranged in the gap. However, each of the silicone gels has adhesiveness even in a state of being sheared to become liquid.
Three glass beads are arranged in the radial cross section of the space, and the position is appropriately changed by the pressure when grasped. At this time, the silicone gel is deformed according to an external force while exhibiting a resistance feeling due to elasticity, and exhibits a shape retention ability due to adhesiveness after the deformation. Silicone gel is sheared finely to a size that fits into the gap between the glass beads like a liquid. Resistance to external force is such that the gel is in one piece, the gel contains multiple glass beads, and the gel is in an unspecified shape. Smaller than the state between glass beads and easily deformed. In addition, since the outer layer is made of an elastic elastomer, there are five or more parts or parts that do not exist according to the deformation, so the grip part 2 is deformed into the shape of a grasped finger, making it easy to hold and slip. Demonstrate effects such as bitterness. Since the number of particles arranged on the cross section increases as the particle size decreases, it becomes possible to smoothly follow the gripped shape and deform. The inner glass beads themselves are hard and elastic due to the silicone gel, so that they do not deform too much when gripped firmly, and a good feeling with a waist is obtained.

  Comparative Example 1 is the same as Example 1 except that the silicone gel is removed. Although the gripping portion can be deformed by the movement of the glass beads, since there is no silicone gel, the movement becomes a tactile sensation without a feeling of resistance or an appropriate lubrication. Moreover, since the adhesive fixation between the glass beads does not occur, the shape memory ability is also small.

  As Comparative Example 2, the one filled with non-adhesive water in place of the silicone gel in Example 2 is given. Although the gripping portion can be deformed by the movement of the glass beads, since the water is filled, the movement becomes a tactile sensation without a feeling of resistance or an appropriate lubrication. Moreover, since the adhesive fixation between the glass beads does not occur, the shape memory ability is small and the original shape is quickly restored.

  The present invention relates to a shaft body in which an elastic resin is provided on at least a portion of the shaft body that is to be gripped. Examples of shafts include writing instruments such as mechanical pencils, ballpoint pens, correction pens, tools such as cutters and engraving swords, drivers, input pens used in PDAs (personal digital assistance) and electronic notebooks, bicycle handles, etc. Wide range.

It is a figure of Example 1 which used this invention for the holding part of the writing instrument. It is a-A 'sectional drawing of FIG. It is a figure when FIG. 1 is hold | gripped. 2 is a diagram of Example 2. FIG. FIG. 5 is a cross-sectional view taken along a-A ′ in FIG. 4. FIG. 5 is a diagram when FIG. 4 is gripped. 10 is a diagram of Example 3. FIG. It is a-A 'sectional drawing of FIG. FIG. 8 is a diagram when FIG. 7 is gripped. FIG. 10 is a diagram of Example 4. It is a-A 'sectional drawing of FIG. It is a figure when FIG. 10 is hold | gripped.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Shaft body 2 Gripping part 3 Gripping part inner layer 4 Gripping part outer layer 5 Fine solid 6 Adhesive substance

Claims (10)

In a shaft body in which at least an elastic resin is disposed and / or integrally provided in the grip portion of the shaft body, a space is provided between the shaft body and the grip portion, and a substance having a fine solid and adhesiveness is provided in the space. The shaft body is characterized in that the size of the fine solid is made smaller than the minimum width of the space. In a shaft body in which at least an elastic resin is disposed and / or integrally provided in the grip portion of the shaft body, a space is provided inside the grip portion, and a fine solid and a sticky substance are arranged in the space, and the fine A shaft body characterized in that the size of a solid is smaller than the minimum width of the space. In a shaft body in which at least an elastic resin is disposed and / or integrally provided in the grip portion of the shaft body, the grip portion provides a space inside by providing at least an inner layer and an outer layer, and this space has a fine solid and adhesive property. A shaft body characterized in that a fine solid is arranged smaller than the minimum width of the space. The shaft body according to any one of claims 1 to 3, wherein the substance having adhesiveness has the same size as a fine solid. The shaft body according to claim 1, wherein a size of the adhesive substance is smaller than a fine solid. The shaft body according to claim 1, wherein the substance having adhesiveness is a liquid. The shaft body according to claim 1, wherein the sticky substance is a gel substance cured by heating and / or leaving a liquid substance. The shaft body according to claim 1, wherein the adhesive substance is a gel substance that is cured by mixing two or more liquids and heating and / or standing. The adhesive substance is a gel substance, wherein the gel substance is sheared by applying an external force to the gripping portion and deformed, and the gel substance is in a liquid state. The shaft body according to claim 8. The shaft according to claim 1, wherein the fine solid is spherical.

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