JP2007229966A - Shaft body - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a more flexible tactile feeling by increasing the amount of air circulation of a gripping part and suppressing sweating of fingertips. <P>SOLUTION: In a shaft body in which the gripping part 2 is provided on the outer periphery of a shaft cylinder 1, a space part 4 is provided between the gripping part and the shaft cylinder, and an opening part 5 communicating the outside space of the gripping part with the space formed between the gripping part and the shaft cylinder is provided in the gripping part. <P>COPYRIGHT: (C)2007,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 give the gripping portion an effect such as slip prevention and easy gripping. As the anti-slip, a configuration (grip) in which an elastic resin such as silicone or elastomer is disposed in the gripping portion is adopted, and a gripping portion that is easy to hold is formed by changing the shape and hardness of the elastic resin. As a method for improving the softness, a method using a low-hardness elastic resin, a method of arranging a plurality of hollow portions penetrating in the axial direction of the gripping portion, a method of encapsulating gas inside a bag of elastic resin, etc. There is.
JP2003-285589A. Japanese Patent No. 2854084. Japanese Patent No. 36474791. Japanese Patent No. 3431317.

However, since the low-hardness elastic resin has a large surface stickiness, when used in the gripping part, the gripping feeling is soft but the tactile feeling is poor. In addition, the gripping part with multiple penetrating hollow parts arranged in parallel is soft, but the area where the fingertip comes into contact with the gripping part increases due to deformation, making it easier to sweat the fingertip. There was a problem of swelling.
In addition, it is difficult to manufacture a gripping portion that encloses a gas having no pillars or protrusions, and there is a problem with durability.

  Therefore, the present invention provides a shaft body provided with a gripping portion on the outer periphery of a shaft tube, and provides a space portion between the gripping portion and the shaft tube, and also provides an external space of the gripping portion, a gripping portion and a shaft tube in the gripping portion. The gist of the invention is that an opening communicating with the space formed between the two is provided.

  The material of the shaft body may be any material that can be molded as a shaft body such as metal, resin, wood, stone, etc. If the material forming the grip portion has the strength to form the shaft body, the grip portion can be made of that material. Can be formed on the shaft body itself, and is not particularly limited. These materials may be one kind or a mixture of two or more kinds.

  The grip portion has a structure in which a space portion is provided between the grip portion and the shaft tube, and an opening portion is provided in the grip portion so as to communicate an external space of the grip portion and a space portion formed between the grip portion and the shaft tube. It has become. The thickness of the gripping portion is not particularly limited, but may be any hardness that can be deformed by gripping, and varies depending on the material and shape. The space formed between the gripping portion and the shaft tube may be set as appropriate according to the thickness of the gripping portion and the outer diameter of the shaft tube, but in order to deform and soften when gripped, the gripping portion It is desirable that the difference between the inner diameter and the outer diameter of the shaft cylinder is larger than the difference between the inner diameter of the gripping portion and the outer diameter. Further, for the purpose of improving strength and manufacturing advantages, a shape in which the gripping portion and a part of the shaft cylinder are connected may be used. Circumferential connection at the end face and / or intermediate part of the gripping part and the shaft tube and connection such that a plurality of communication holes are provided in the axial direction between the gripping part and the shaft tube can be mentioned. Is not particularly limited as long as it is connected to at least one point.

  The grip portion is provided with an opening that communicates the external space of the grip portion with a space portion formed between the grip portion and the shaft tube. Examples of the shape of the opening include a pattern in which a certain shape is repeated in the circumferential direction and / or the axial direction, a pattern in which the shape is continuously changed in the circumferential direction and / or the axial direction, and the like. There is no particular limitation as long as the external space communicates with the space formed between the gripping portion and the shaft tube. Even if it is a hard material by an opening part, it becomes easy to deform | transform, and since there is also a space part formed between a holding part and a shaft cylinder, a softer tactile sensation is obtained.

  Resin and / or elastic resin can be used as the material for the shaft tube and / or the gripping 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. However, since the elastic resin of 60 degrees at Shore A and 80 degrees or more at Asker C becomes hard and less sticky and swells on the surface, it is an elastic resin at 60 degrees or less at Shore A and 80 degrees or less at Asker C. It is desirable.

  As a manufacturing method of the shaft tube and / or the gripping part, a method of integrally forming the gripping part and the shaft tube by injection molding, a method of constituting and inserting with separate members, a method of coating an elastic resin on the surface of the shaft tube, Or the method of integrally forming by 2 color molding or insert molding, etc. are mentioned, However, The manufacturing method is not specifically 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 substances having oil absorption and / or water absorption may be one kind or a mixture of two or more kinds.

  It is desirable to add a substance having oil absorption and / or water absorption as a 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 added amount is 0.001% to 50%, particularly 0.01% to 10% by weight with respect to the elastic resin.

To give these resins and / or elastic resins functionalities such as improved touch comfort and fingertip fit, improved design such as coloring and patterns, absorption and release of antibacterial and sweat, and self-cleaning by photocatalytic reaction Powders, fine particles, foaming agents and 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 oxides such as carbon black, graphite, titanium oxide, tin oxide, and indium oxide, nitrides such as titanium nitride, chromium nitride, zirconium nitride, and tantalum nitride, titanium carbide, zirconium carbide, Carbides such as tantalum carbide, borides such as titanium boride, zirconium boride, and tantalum boride are exemplified, and are not particularly limited. 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 chemical foaming agents 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 and the like. Examples 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, and zinc powder + acid.
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 consisting of copolymers of vinylidene chloride, acrylonitrile, acrylic esters, methacrylic 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.

  Moreover, a metal is mentioned as a material which forms a shaft cylinder and / or a holding part. Examples of the metal material include stainless steel, gold, silver, copper, tin, brass, titanium, aluminum, and alloys thereof. However, it is sufficient that the material can be formed by processing such as weaving or knitting, punching, or molding a material that has been thinned into a fibrous shape. There is no particular limitation. Further, the metal may be subjected to decoration such as plating, painting, oxidation treatment, and anticorrosion treatment. These metals may be one kind or a mixture of two or more kinds.

  The present invention provides a shaft body having a gripping portion provided on an outer periphery of a shaft tube, and a space portion is provided between the gripping portion and the shaft tube, and the gripping portion has an external space between the gripping portion and the gripping portion and the shaft tube. Since the opening part which connects with the space formed in this is provided, while increasing the air circulation amount of a holding part, sweating of a fingertip can be suppressed and a softer tactile sensation can be provided. In the past, when soft and easy to hold, there was a problem that stickiness occurred, the contact area between the gripping part and the fingertip increased, and it was easy to sweat on the fingertip, and the slipping due to sweat and the gripping part swelled. In addition, by generating air circulation in the gripping portion by deformation due to gripping or the communicating opening, it is possible to always keep the fingertip in use in a comfortable state and to prevent swelling of the elastic resin. Furthermore, additional functions such as antibacterial and sweat absorption / release, heat retention, cooling, and self-cleaning by photocatalytic reaction can be easily provided by adding functional materials to resin and elastic resin, two-color molding, and painting. I can do it.

  According to the present invention, a space is provided between the gripping portion and the shaft tube, and an opening for communicating the external space of the gripping portion and the space portion formed between the gripping portion and the shaft tube is provided in the gripping portion. Is the most important feature. The purpose of preventing the sticking and swelling of the gripping part was realized by creatively inventing the shape of the opening and forming the opening by forming a fiber, resin, elastic resin, metal material or mesh shape.

Example 1
FIG. 1 is a perspective view of parts in Example 1 in which the present invention is used for a gripping part of a writing instrument, and FIG. 2 is a side view thereof. 3 is a cross-sectional view taken along line AA in FIG. Reference numeral 1 is a shaft cylinder, reference numeral 2 is a gripping part, reference numeral 3 is an elastic resin, reference numeral 4 is a space provided between the gripping part and the shaft cylinder, and reference numeral 5 is an opening. This will be specifically described. A space (space portion 4) is provided on the outer periphery of the shaft tube 1 so as to surround the grip portion 2 (space portion 4). The shaft tube 1 and the grip portion 2 are provided with a ring-shaped connecting portion 6 at the rear end. Are linked. That is, the shaft tube 1 and the grip portion 2 are integrally formed of an elastic resin 3, and the front portion of the connecting portion 6 is the space portion 4. In addition, a rhombus-shaped opening 5 is formed in the grip 2, and the opening 5 communicates with the space 4.

  The shaft tube 1 and the grip portion 2 are formed of polyethylene, and an elastomer (actimer AE-2040S, manufactured by Riken Technos Co., Ltd., Shore A hardness: 40 degrees) is formed as an elastic resin 3 on the surface of the grip portion 2. Specifically, it was molded in the manner of two-color molding. Although it is originally a hard polyethylene, the softness comes out by the moderate thickness, the space 4 provided between the gripping part and the shaft tube, and the opening part 5 of the gripping part, and the elastic resin 3 on the surface makes it more slippery. Realized. Further, since there is a space 4 and an opening 5 provided between the gripping part and the shaft cylinder, air flow occurs along with the deformation of the gripping part when gripping, so that the contact area with the fingertip is increased by the deformation of the gripping part. Even if it increases, it is hard to sweat and it is possible to continue comfortable gripping.

Example 2
FIG. 4 is a component diagram of Example 2 in which the present invention is used for a grip portion of a writing instrument. 5 is a cross-sectional view taken along line BB in FIG. 4, and FIG. 6 is a cross-sectional view taken along line bb in FIG. Reference numeral 1 is a shaft cylinder, reference numeral 2 is a gripping part, reference numeral 4 is a space provided between the gripping part and the shaft cylinder, and reference numeral 5 is an opening. This will be specifically described. The outer periphery of the shaft tube 1 is provided with a gap (space portion 4) so that the grip portion 2 surrounds the shaft tube 1, and the shaft tube 1 and the grip portion 2 are connected in a ring shape formed in an intermediate portion. They are connected at part 6. That is, the shaft tube 1 and the grip portion 2 are integrally formed of an elastic resin 3, and the front-rear direction is the space portion 4 with the connecting portion 6 as a boundary. In addition, an elliptical penetrating opening 5 is formed in the grip 2, and the opening 5 communicates with the space 4.

  The shaft cylinder 1 and the grip portion 2 were molded by injection molding using polypropylene. Although it is originally a hard polypropylene, the softness comes out by moderate thickness, the space 4 provided between the holding part and the shaft cylinder, and the opening part 5 of the holding part. Further, since there is a space 4 and an opening 5 provided between the gripping part and the shaft cylinder, air flow occurs along with the deformation of the gripping part when gripping, so that the contact area with the fingertip is increased by the deformation of the gripping part. Even if it increases, it is hard to sweat and it is possible to continue comfortable gripping.

Example 3
FIG. 7 is a component 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 CC of FIG. 7, and FIG. 9 is a cross-sectional view taken along the line cc of FIG. Reference numeral 1 is a shaft cylinder, reference numeral 2 is a gripping part, reference numeral 4 is a space provided between the gripping part and the shaft cylinder, and reference numeral 5 is an opening. This will be specifically described. The outer periphery of the shaft tube 1 is provided with a gap (a space portion 4) so that the grip portion 2 surrounds the shaft tube 1, but the shaft tube 1 and the grip portion 2 are partially formed in the axial direction. In the part 6, it is connected (in this example, four connecting parts 6). That is, the shaft cylinder 1 and the grip portion 2 are integrally formed of an elastic resin 3, and the circumferential direction is a space portion 4 with the connecting portion 6 as a boundary. That is, the 1/4 arc-shaped space 4 is formed in the axial direction. In addition, an opening 5 that extends in the axial direction is formed in the grip portion 2, and the opening 5 communicates with the space portion 4.

  The shaft cylinder 1 and the grip portion 2 were formed by injection molding using an elastomer (Lavalon MJ3701c, manufactured by Mitsubishi Chemical Corporation, Shore A hardness: 70 degrees). Although it is an elastomer having a high hardness, the softness comes out due to the moderate thickness, the space 4 provided between the grip portion and the shaft tube, and the opening portion 5 of the grip portion. Further, since there is a space 4 and an opening 5 provided between the gripping part and the shaft cylinder, air flow occurs along with the deformation of the gripping part when gripping, so that the contact area with the fingertip is increased by the deformation of the gripping part. Even if it increases, it is hard to sweat and it is possible to continue comfortable gripping.

Example 4
FIG. 10 is a component diagram of the fourth embodiment in which the present invention is used for the grip portion of the writing instrument, and is a view corresponding to FIG. 8 of the third embodiment. Reference numeral 1 is a shaft cylinder, reference numeral 2 is a gripping part, reference numeral 4 is a space provided between the gripping part and the shaft cylinder, and reference numeral 5 is an opening. This will be specifically described. A space (space portion 4) is provided on the outer periphery of the shaft tube 1 so as to surround the grip portion 2, but the shaft tube 1 and the grip portion 2 are formed of different members. And the leg part 7 is formed in the inner surface of the holding | grip part 2, and is contact | abutting to the outer peripheral surface of the said axial cylinder 1 (in this example, four leg parts 7). That is, the space portion 4 is formed by the leg portion 7. Further, the holding part 2 is formed with a through-opening part 5 extending in the axial direction as in the third embodiment, and the opening part 5 communicates with the space part 4. A mechanical pencil lead-out mechanism, a ballpoint pen fill, and the like are inserted into the shaft tube 1. That is, the shaft tube in this example is a main body portion of the writing instrument.

  The shaft cylinder 1 is formed by injection molding using polypropylene having a high hardness, but the grip portion 2 is formed by injection molding using an elastomer (Lavalon MJ3701c, manufactured by Mitsubishi Chemical Corporation, Shore A hardness: 70 degrees). Molded. Although it is an elastomer having a high hardness, the softness comes out due to the moderate thickness, the space 4 provided between the grip portion and the shaft tube, and the opening portion 5 of the grip portion. Further, since there is a space 4 and an opening 5 provided between the gripping part and the shaft cylinder, air flow occurs along with the deformation of the gripping part when gripping, so that the contact area with the fingertip is increased by the deformation of the gripping part. Even if it increases, it is hard to sweat and it is possible to continue comfortable gripping.

Comparative Example 1
FIG. 11 is a component diagram of Comparative Example 1 in which the present invention is used for a grip portion of a writing instrument. 12 is a cross-sectional view taken along the line DD of FIG. Reference numeral 1 is a shaft cylinder, reference numeral 2 is a gripping part, and reference numeral 4 is a space provided between the gripping part and the shaft cylinder.

  The shaft cylinder 1 and the grip portion 2 were molded by injection molding using an elastomer (Actimer AE-2040S, manufactured by Riken Technos Co., Ltd., Shore A hardness: 40 degrees) as the elastic resin 3. A moderate thickness and a space 4 provided between the gripping part and the shaft cylinder achieves a soft tactile sensation, but when gripping, the deformation of the gripping part increases the contact area with the fingertip, making it easy to sweat. When I kept holding it, it became slippery with sweat.

  The present invention relates to a shaft body provided with a grip portion. 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 component perspective view of Example 1 which used this invention for the holding part of the writing instrument. It is a side half sectional view of FIG. It is the aA expanded sectional view of FIG. It is component drawing of Example 2 which used this invention for the holding part of the writing instrument. FIG. 5 is an enlarged sectional view taken along line BB in FIG. 4. FIG. 5 is an enlarged sectional view taken along line bb in FIG. 4. It is component drawing of Example 3 which used this invention for the holding part of the writing instrument. FIG. 8 is an enlarged cross-sectional view taken along line CC in FIG. 7. FIG. 10 is a cross-sectional view taken along the line cc of FIG. 8. It is component drawing (FIG. 8 equivalent figure) of Example 4 which used this invention for the holding part of the writing instrument. It is component drawing which shows a comparative example. FIG. 12 is an enlarged sectional view taken along line D-D in FIG. 11.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Shaft cylinder 2 Gripping part 3 Elastic resin 4 Space part provided between the grip part and the shaft cylinder 5 Opening part 6 Connection part 7 Leg part

Claims (6)

In a shaft body provided with a grip portion on the outer periphery of the shaft tube, a space portion is provided between the grip portion and the shaft tube, and the grip portion is formed between an external space of the grip portion and the grip portion and the shaft tube. A shaft having an opening communicating with a space. The shaft body according to claim 1, wherein the shaft tube and the grip portion are integrally formed. The shaft body according to claim 1, wherein the shaft cylinder and the grip portion are formed of different members. The shaft body according to claim 1 or 2, wherein the shaft cylinder and the grip portion are partially connected to each other. The shaft body according to any one of claims 1 to 4, wherein the shaft cylinder and / or the grip portion is made of resin and / or elastic resin. The shaft body according to any one of claims 1 to 5, wherein the shaft cylinder and / or the grip portion is made of metal.

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