JPH11195345A - Push button - Google Patents

Abstract

PROBLEM TO BE SOLVED: To decompose contamination substance such as sweat and fat attached to the surface of a push button, and function (activate) photocatalyst even when illumination is disconnected to be dark. SOLUTION: A resin layer mixed with photocatalyst 5 is provided to be laminated on a resin layer mixed with a luminous member 6 on the surface of a push button 1, so that luminous member 6 self-emits light to function the photocatalyst 5 for a specified time after illumination is disconnected. The photocatalyst 5 comprises titanium oxide particles in the form of an anatase crystal form, and liquid of water and/or organic solvent, acrylic resin, alkyd melamine resin, vinyl acetate resin, fluorine resin, silicone resin, epoxy resin, urethane resin, etc., is applied.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a push button provided with at least two kinds of functional members of a light storage member, a photocatalyst and an antibacterial member, and more particularly to a push button constituting an input device such as a keyboard and a remote control switch.

[0002]

2. Description of the Related Art As a push button for a switch having a light-storing member on its surface, for example, Japanese Patent Application Laid-Open No. 8-329766 proposes a configuration in which a button made of a light-storing member is put on an operation button. In Japanese Patent Application Laid-Open No. 9-134637, a display portion is formed on a first resin layer obtained by adding a light-storing material to a light-transmitting resin, and a light-shielding portion is formed on the first resin layer except for the display portion. A configuration of covering with two resin layers has been proposed.

For example, Japanese Patent Application Laid-Open No. 9-46055 proposes a configuration in which an antibacterial member is mixed in a molding material of an operation button as a push button provided with an antibacterial member constituting a switch.

[0004]

Heretofore, there has been proposed a configuration in which one functional member such as an antibacterial member and a phosphorescent member is provided on the surface of a base material constituting a push button. However, no configuration has been proposed in which at least two functional members are combined on the surface of the base material of the push button. For example, a push button for various uses including a light storage member and a photocatalyst, and a light storage member and an antibacterial member has not been proposed.

[0005] Even if an unspecified number of users use the switch, the pushbutton provided with the antibacterial member sterilizes various bacteria adhered to the surface by the antibacterial member and keeps the pushbutton surface clean. However, contaminants such as sweat and hand oil attached to the surface of the push button are not decomposed.

The present invention provides a push button provided with a functional member comprising at least two kinds of combinations of a photocatalyst, a phosphorescent member (referred to as a phosphorescent phosphor, a phosphorescent paint, a fluorescent paint, etc.) and an antibacterial member on the surface. The purpose is to do. By providing at least two types of functional members, a plurality of functions such as decomposition of contaminants, sterilization, mold prevention, and provision of luminous properties can be exerted together. In addition, a push button provided with a photocatalyst and a light storage member receives light from the light storage member and activates (activates) the photocatalyst even when the illumination is cut off and darkened. Furthermore, even when only the photocatalyst is provided, functions such as decomposition of contaminants, sterilization, and fungicide can be exhibited.

[0007]

In order to solve the above-mentioned problems, a push button according to the present invention comprises: (1) at least two of a light storage member, an antibacterial member, and a photocatalyst;
A push button having a surface coated with a liquid material obtained by mixing functional members of various combinations was used. (2) A push button provided with a photocatalyst layer overlaid on the phosphorescent member layer. (3) A light-storing member is mixed therein, and a film sheet provided with a photocatalyst on the surface is attached to the top of the push button by means such as in-mold molding. (4) After applying the liquid member on the surface of the base material,
Among the antibacterial members and the photocatalyst, at least two types of functional members were sprayed to form push buttons fixed to the base material surface.

In the above arrangement, one of the means for disposing the above-mentioned various functional members on the surface of the base material is such that the functional members are mixed and applied to a liquid material. For example, when a photocatalyst is provided, the photocatalyst is formed of titanium oxide particles in the form of anatase crystal, and the titanium oxide particles are suspended or suspended in water and / or an organic solvent, or a slurry is applied. As the organic solvent, propanol, alcohol, ester, ether, amine, hydrocarbon, a mixture thereof, a member obtained by adding hydrochloric acid, nitric acid, or the like to water, or the like was used. The addition of a silane coupling agent or a titanium coupling agent to the titania sol solution, or the addition of a surfactant to the solvent may be arbitrarily performed.

As another liquid material for mixing the functional members, acrylic resin, alkyd melamine resin,
Vinyl acetate resin, fluorine resin, silicon resin,
Epoxy resin, urethane resin, siloxane resin, U
V resin (ultraviolet curing resin), natural rubber, butyl rubber, vinyl chloride resin, phenol resin, ABS resin, PS
Resin, styrenic resin, polyamide resin, inorganic glass (glaze), PVA (polyvinyl alcohol / povar), or the like. For example, a fluororesin compound / fluoropolymer (for example, Cytop / trade name of Asahi Glass Co., Ltd.) may be used.

[0010] It is desirable that the liquid mixed with the photocatalyst or the phosphorescent member has a light transmitting property to receive near ultraviolet rays. However, this does not apply when the photocatalyst or the phosphorescent member is impregnated with water or aniline. As means for arranging the functional member on the push button (substrate), in addition to the above-described coating method, sputtering, vapor deposition, CVD, PVD,
It goes without saying that any means such as electrodeposition may be used.

In the above configuration of the present invention, the functional member is an antibacterial member, a luminous member, a photocatalyst or the like. As the combination, a phosphorescent member and a photocatalyst, a phosphorescent member and an antibacterial member, and the like were used. Of course, any other combination of functional members is possible.

The form of the antibacterial member provided on the base material is one of a powder particle form and a liquid form. In addition, the outer dimensions of the antibacterial member in the form of powder particles are about 0.05.
It was about μm to about 20 μm. 0.5% by weight
To about 10%. By disposing the antimicrobial member on the surface of the substrate, the survival environment of bacteria attached to the substrate is cut off.

The antibacterial member is made of any one of zeolite (antibacterial metal ion / silver, copper, zinc), chitosan, mugwort, hinoki (hinokitiol), hiba and the like. Zeolites are antibacterial ceramics that contain germicidal substances such as silver, copper, and zinc. Chitosan is a natural polysaccharide often contained in crab shells and shrimp shells, and has antibacterial and antifungal properties. The ratio of the powder particles embedded in the surface of the push button, mixed in the adhesive, or mixed in the solution or water is sufficient at a weight ratio of about 0.3% to about several%, and is a fine powder having a particle size of about 5 μm or less.

The mugwort has a tannin contained in the mugwort, which has an antiallergic and antipruritic effect, and chlorophyll (chlorophyll) has a sterilizing and bacteriostatic effect. What is necessary is just to embed or apply as a microcapsule and fix it on the surface of the object. The cypress plays a role of a preservative to prevent tropilone contained in the cypress from attracting bacteria, mold, etc., and may be used as microcapsules having a particle size of several micrometers as in other antibacterial members.

As the liquid antibacterial member, cypress or cypress essential oil (essential oil) or metronidazole, or silver acetate or silver nitrate is dissolved in pure water, and K ↓ 2SO ↓ 3 and K ↓ 2S ↓ are added to the solution. 2O ↓ 3 is sequentially added to obtain a solution containing at least one of a silver thiosulfato complex salt and a silver salt. Further, an antibacterial complex in which at least one of a silver thiosulfato complex salt or a silver salt is supported and adsorbed on hydrated amorphous silicon dioxide, and a shell coating layer is further formed on the outer surface thereof, or an organic arsenic binazine or the like. It may be mixed at a ratio of about 0.5% to about 10% by weight.

In addition to the above, as an antibacterial member, iodoform, silver silica gel antibacterial agent particles, diphenyl ether based or silicon quaternary ammonium salt (trade name AC)
P-20, TK-520), a mixture of zirconium phosphate and silver oxide, a compound in which isothiocyanate is used as an antibacterial component and is included in cyclodextrin, or the like.

Any member may be used as the photocatalyst.
For example, fine powder particles of a photocatalyst made of titanium dioxide or a mixture of titanium dioxide and activated carbon were used. Powder particles of the photocatalyst or liquid containing the photocatalyst (any one of forms such as a solvent, a vehicle, a paint, and an adhesive)
By disposing the thin film on the surface of the object, the surface can be prevented from being stained, bacteria on the surface can be killed, and the attached odor can be removed. That is, 300 nm to 400 nm such as sunlight and fluorescent light.
The photocatalyst which has received near-ultraviolet light is activated to oxidize and decompose organic substances (acetaldehyde, ammonia, etc.), nitrogen oxides, chlorine compounds and the like.

The fine powder particles of the photocatalyst comprising titanium dioxide or a mixture of titanium dioxide and activated carbon have an outer shape of several nm to several tens μm. In addition, the content of the liquid may be about 0.1% by weight to about 10% by weight. The coating thickness may be arbitrarily determined according to the purpose of use. For example, it may be applied to a thickness of 0.1 μm to several μm. The application to the substrate is performed by dipping, spraying, printing (screen printing, gravure printing electrostatic printing, ink jet, tampo printing, etc.). Titanium dioxide may be formed by any means, such as vacuum deposition, CVD, and sputtering, in addition to the above coating method.

The titanium dioxide is preferably an anatase type, but may be a rutile type titanium dioxide metallized with copper, silver, platinum or other metals. Also, W
A photocatalyst may be formed of a semiconductor such as O ↓ 2, Cds, SrTiO ↓ 2, and MoS ↓ 2.

Further, it is the same that the photocatalyst may be impregnated with water or an organic solvent (such as aniline). The photocatalyst impregnated with water or an organic solvent may be mixed with a liquid material such as an arbitrary inorganic or organic binder, vehicle, paint, adhesive or the like, and applied to the surface of the target member. Water or an organic solvent evaporates during the heating and drying process of the liquid material to form pores in the photocatalyst holding film, thereby enabling the photocatalyst to be directly irradiated with near ultraviolet rays.

When there is a risk of decomposing the carrier of the photocatalyst, a structure in which the surface of the titanium oxide particles is covered with a photoinactive substance, a structure in which the surface of the titanium dioxide particles is covered with a porous wall made of a photoinactive substance, or ceramics Any one of the configurations, such as a configuration in which the surface of the titanium dioxide particles is covered with apatite, may be used. The photo-inactive substance was any one of silicon, aluminum, zirconium, calcium, barium, strontium, magnesium, zinc, niobium and the like, or a combination thereof. By coating the surface of the titanium dioxide with a photoinactive substance, a porous wall made of the photoinactive substance, apatite, etc., deterioration of the photocatalyst carrier (holding member) such as resin, glass, etc. can be reduced.

As the luminous substance, for example,
N night light or SrAl ↓ 2O ↓ 4: Eu (emission peak wavelength 520 nm, afterglow luminance 300 mcd / m ↑ 2 (20
20 minutes after irradiation with 0 LX for 4 minutes), afterglow time 20
00 minutes or more (time required to decay to 0.32 mcd / m ↑ 2)) or ZNs: Cu, or ZnS, C
Any member such as one or two kinds of sulfide phosphorescent materials such as dS, CaS, and (ZnCd) S may be used. The applied thickness of the liquid containing the phosphorescent substance (any one of a solvent, a vehicle, a paint, and an adhesive or a combination thereof) is 0.1.
It was about 1 μm to 10 μm. The mixing ratio of the luminous substance to be mixed with the liquid material was in the range of about 0.1% by weight to 10% by weight.

It goes without saying that the push button may be made of any member such as a resin member or a rubber member and of any shape. When the push button substrate is made of a resin, for example, acrylic resin, epoxy resin, polycarbonate, vinyl chloride, vinylidene chloride, styrene, polyacetal, ABS, PS,
PP, urethane, etc.

The push button of the present invention can be provided with at least two kinds of photocatalysts, antibacterial members, luminous substances and the like by the above-mentioned structure. The antibacterial member prevents the growth of mold and bacteria, and the photocatalyst decomposes pollutants adhering to the atmosphere or to the surface. In addition, the luminous substance absorbs and accumulates the light of sunlight and fluorescent lamps, can maintain the brightness for a certain period of time even if the lighting is interrupted and dark, illuminates the surrounding area, facilitates the operation of electronic devices, etc., and activates the photocatalyst Function.

[0025]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A first invention according to the present invention is directed to a push button wherein a liquid material in which at least two types of functional members are mixed among a phosphorescent member, an antibacterial member, and a photocatalyst is applied to a surface thereof. The antibacterial member prevents the growth of mold and bacteria, and the photocatalyst decomposes pollutants attached to the air or on the surface. Further, the luminous substance has a function of illuminating the surroundings for a certain period of time and activating the photocatalyst even if the illumination is interrupted and dark.

Further, the second invention is a push button characterized in that a photocatalyst layer is provided so as to overlap the light storage member layer, and the photocatalyst decomposes pollutants adhering to the atmosphere or to the surface. The luminous substance illuminates the surrounding area for a certain period of time even when the illumination is interrupted and becomes dark, activates the photocatalyst, and decomposes pollutants.

Further, a third invention is a push button characterized in that a phosphorescent member is mixed therein and a film sheet provided with a photocatalyst on the surface is adhered (attached). It can be prepared in another process in advance. In addition, a film sheet is arranged in a mold to enable in-mold molding.

Further, according to a fourth aspect of the present invention, after the liquid member is applied to the surface of the base material, the light-storing member, the antibacterial member, and the photocatalyst are applied.
At least two types of functional members were sprayed, and the push button was fixed to the base material surface.The antibacterial member prevented the growth of mold and bacteria, and the photocatalyst adhered to the atmosphere or to the surface. Break down pollutants. Further, the luminous substance has a function of illuminating the surroundings for a certain period of time and activating the photocatalyst even if the illumination is interrupted and dark.

Hereinafter, a push button according to an embodiment of the present invention will be described with reference to FIGS.

(Embodiment 1) FIG. 1 is a sectional view showing a main part of a switch device using a push button according to Embodiment 1 of the present invention. In FIG. 1, reference numeral 1 denotes a push button (substrate), 2 denotes a liquid material, 3 denotes a case (cabinet) constituting various electronic devices such as a remote controller and a mobile phone, and 4 denotes printed wiring provided with various electronic components and a wiring pattern. The substrate 5 is a photocatalyst, 6 is a light storage member, and 10 is a switch device.

As shown in FIG. 1, the switch device 10 comprises:
First, a first functional member (light-storing member) is applied to the outer surface (surface) of the push button (substrate) 1, and then the second functional member (light-storing member) is superimposed on the first functional member (light-storing member). (A photocatalyst or an antibacterial member). First
By arbitrarily selecting a combination of the functional member and the second functional member, at least two types of functional members such as a photocatalyst, an antibacterial member, and a luminous substance can be easily disposed on the surface of the base material. it can.

When the particulate functional member is disposed,
The particle size is in the range of 0.1 μm to several μm, and mixed and kneaded in a liquid material such as a transparent acrylic resin, an epoxy resin, a resin member such as vinyl chloride in the range of several weight% to several tens weight%, respectively. It becomes. The coating thickness of each layer is 0.1 μm
To several μm. The application means was any one of spray, electrostatic printing, ink jet, dipping, screen printing and the like. Of course, any other means may be used.

The means for disposing the functional members is not necessarily limited to using a resin-based liquid. The solvent for dispersing the functional member is water or / and an organic solvent such as an alcohol,
Alternatively, it may be a slurry.

The photocatalyst particles are crystalline anatase, and particles having a size in the range of 0.001 μm to several μm are treated with water or / and water.
And a suspension or a slurry in an organic solvent applied in a thickness of 0.01 μm to several μm, and a suspension in propylene glycol with a particle diameter in a range of several μm to several tens μm. It may be carried out arbitrarily, for example, in the case of applying an adhesive. Further, in addition to mixing and applying the liquid material as described above, evaporation, sputtering, CVD, PV
D, welding or the like may be used. Furthermore, it goes without saying that the coating thickness of the functional member may be different for each functional member. Any size may be set according to the purpose. FIG. 5 is a perspective view of a main part of a remote control transmitter using a push button according to the present invention. It goes without saying that the push button of the present invention can also constitute any electronic device such as a keyboard portion of a mobile phone, a personal computer or the like.

The push button according to the first embodiment illuminates the surroundings for a certain period of time even in a dark place by means of the light storage member, and activates the photocatalyst attached thereto. The antibacterial member prevents the growth of mold and bacteria, and the photocatalyst oxidizes and decomposes organic substances, nitrogen oxides, chlorine compounds, and the like. As a result, mold prevention of the push button, decomposition of contaminants, and the like can be achieved. In particular, the phosphorescent member 6 as the first functional member
In the case where the photocatalyst 5 is disposed as a second functional member, the photocatalyst 5 is activated by the light storage member even in a dark state where the light is cut off, and the decomposition of the contaminants attached to the push button can be continued. .

(Embodiment 2) FIG. 2 is a sectional view showing a main part of a switch device using a push button according to Embodiment 2 of the present invention. In FIG. 2, reference numeral 20 denotes a switch device, 21 denotes a push button, and 22 denotes a liquid material. Others are the same as FIG.

As shown in FIG. 2, the push button 21 is characterized in that a liquid material obtained by mixing at least two types of functional members, such as a phosphorescent member, an antibacterial member, and a photocatalyst, is applied to the surface. In this case, the photocatalyst was titanium oxide particles in the form of anatase crystals. Further, a configuration in which the liquid material is water and / or an organic solvent and the functional member is suspended (or slurry) and applied, or the functional member is formed of an acrylic resin, an alkyd melamine resin, a vinyl acetate resin, a fluororesin, Silicone resin, epoxy resin,
Knead into any one of urethane resin, UV resin (ultraviolet curing resin), natural rubber, butyl rubber, vinyl chloride resin, phenol resin, ABS resin, PS resin, styrene resin, polyamide resin and inorganic glass The composition was applied.

By arbitrarily selecting a combination of the first functional member and the second functional member, at least two or more types of functional members such as a photocatalyst, an antibacterial member, and a luminous substance can be easily pressed. Can be installed on the surface.

The amount of each functional member mixed into the liquid was in the range of several weight% to 10 weight%. The coating thickness was in the range of 0.01 μm to several μm. The application means, the dispersion medium, the type of the functional member, the means for disposing the functional member, and the like may be implemented in the same manner as in the first embodiment. The second embodiment also has the same operation and effects as the first embodiment. Further, the time required for mixing with the liquid material, the time required for applying to the base material, and the like are approximately １ ／ of those in the first embodiment.

(Embodiment 3) FIG. 3 is a sectional view showing a main part of a switch device using a push button according to Embodiment 3 of the present invention. In FIG. 3, reference numeral 7 denotes a film sheet, 30 denotes a switch device, 31 denotes a push button, and 32 denotes a liquid material. Others are the same as FIG. In this case, the push button 31 is a film sheet formed by mixing the light storage member 6 inside the translucent film sheet 7 and having one of a photocatalyst and an antibacterial member on the surface of the translucent film sheet 7. The member is attached to (adhered to) the surface of the push button 31.

The translucent film sheet 7 is made of PET resin, PS resin, polyimide, vinyl chloride, nylon,
It is made of a material such as styrene resin and has a thickness of several μm
The range was about 100 μm. On one surface of the translucent film sheet 7 shown in FIG. 3, a photocatalyst 5 mixed with a liquid material is provided in a predetermined manner. The type of the photocatalyst 5, the liquid to be mixed, the coating means, the coating film thickness, and the like may be performed in the same manner as in Embodiment 1. The third embodiment has the same operation and effect as the first embodiment. Further, various film sheets are prepared in advance in different steps, or a film sheet having a plurality of functional members is set in a mold to enable in-mold molding of a resin member and a rubber member.

(Embodiment 4) FIG. 4 is a sectional view showing a main part near the surface of a push button according to Embodiment 4 of the present invention. FIG.
In the figure, reference numeral 41 denotes a push button (substrate), reference numeral 42 denotes a liquid member, and other configurations are the same as those in FIG.

In this case, the push button is formed by first applying a liquid member 42 to the surface of the push button 41 and then using a means such as a sieve vibrating mechanism to combine at least two types of functional members out of the phosphorescent member, the antibacterial member and the photocatalyst. The liquid member 42 is sprayed and fixed to the surface of the liquid member 42. Further, the sprayed functional member is pressed by a plate, a roller, or the like as necessary, and at least a part of the functional member is embedded in the surface of the liquid member.

The liquid member 42 is coated with a general adhesive, paint, vehicle or the like to a thickness of several μm to several μm, and sprays a functional member while the surface is wettable (adhesive). did.
As a matter of course, the liquid (not including the functional member) used in Embodiment 1 may be applied. That is, any member such as various resin members, water and / or an organic solvent may be used. The type and particle size of the functional member may be the same as in the first embodiment. After spraying and pressing the functional member, the liquid member is heated at a temperature of 150 degrees
What is necessary is just to harden and to fix the said functional member.

The push button according to the fourth embodiment has the same effect as that of FIG. 1, and also has the effect that a functional member can be easily disposed on the surface of the push button having an arbitrary shape.

In the first to fourth embodiments, 2
Although the configuration in which three functional members are arranged on the surface of the push button has been described,
It goes without saying that the function to be provided may be two or more arbitrary functional members. Further, it is the same that the function of only one photocatalyst may be provided. When only the photocatalyst is provided, the layer including the light storage member is not formed in the configuration of FIG. Similarly, in the configuration of FIG. 2, the light storage member is not mixed into the liquid material. Similarly, in the configuration of FIG. 3, the light storage member is not mixed in the film sheet. Similarly, in the configuration of FIG. 4, the light storage member is not scattered.

[0047]

As described above, according to the present invention, at least two types of functional members, such as a phosphorescent member, a photocatalyst, and an antibacterial member, can be easily disposed on the surface of the push button. The antibacterial member prevents the growth of mold and bacteria, and the photocatalyst decomposes contaminants (such as sweat and hand oil) attached to the surface of the card. This makes it possible to prevent the push button from mold and fog. The phosphorescent substance emits light for a certain period of time even after the light is turned off, and illuminates the surroundings to function as a photocatalyst.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of a switch device using a push button according to a first embodiment of the present invention.

FIG. 2 is a sectional view of a main part of a switch device using a push button according to a second embodiment of the present invention.

FIG. 3 is a sectional view of an essential part of a switch device using a push button according to a third embodiment of the present invention.

FIG. 4 is a cross-sectional view of a main part near the surface of a push button according to a fourth embodiment of the present invention.

FIG. 5 is a perspective view of a main part of a remote control transmitter using the push button of the present invention.

[Explanation of symbols]

 1, 21, 31, 41 push button (substrate) 2 liquid material 3 case 4 printed wiring board 5 photocatalyst 6 light storage member 7 film sheet 10, 20, 30, 40 switch device 51 remote controller 52 solar cell 53 push button switch

Claims (24)

[Claims] 1. A push button having a surface coated with a liquid material in which at least two types of functional members are combined among a light storage member, a photocatalyst, and an antibacterial member. 2. The push button according to claim 1, wherein the photocatalyst is titanium oxide particles in anatase crystal form. Wood. 3. The push button according to claim 2, wherein the liquid material is water and / or an organic solvent. 4. A liquid material comprising acrylic resin, alkyd melamine resin, vinyl acetate resin, fluorine resin, silicon resin, epoxy resin, urethane resin, UV resin (ultraviolet curable resin), natural rubber, butyl rubber, 3. The push button according to claim 2, wherein the push button is any one of a vinyl chloride resin, a phenol resin, an ABS resin, a PS resin, a styrene resin, a polyamide resin, and an inorganic glass. 5. A push button provided with at least two types of functional members out of a phosphorescent member, a photocatalyst, and an antibacterial member on the surface of a base material. 6. A push button comprising a photocatalyst layer superimposed on a light storage member layer. 7. A push button comprising: a phosphorescent member mixed therein; and a film sheet provided with either a photocatalyst or an antibacterial member on the surface. 8. A push button wherein a liquid member is applied to the surface of a base material, and then at least two types of functional members among a light storage member, a photocatalyst, and an antibacterial member are dispersed and fixed to the base material surface. . 9. The push button according to claim 8, wherein the functional member is pressed and at least a part is embedded in the surface of the liquid member. 10. The push button according to claim 5, wherein the photocatalyst is titanium oxide particles in anatase crystal form. 11. The photocatalyst particle according to claim 5, wherein the surface of the photocatalyst particles is covered with any one of a photoinactive substance, a porous wall made of the photoinactive substance, and apatite of ceramics. Or the push button according to item 1. 12. The method according to claim 1, wherein the photoinert substance is any one of silicon, aluminum, zirconium, calcium, barium, strontium, magnesium, zinc, and niobium, or a combination thereof.
The pushbutton according to 1. 13. A push button, wherein a liquid material mixed with a photocatalyst is applied to the surface. 14. The push button according to claim 13, wherein the photocatalyst is titanium oxide particles in anatase crystal form.
Wood. 15. The push button according to claim 14, wherein the liquid material is water and / or an organic solvent. 16. A liquid material comprising an acrylic resin, an alkyd melamine resin, a vinyl acetate resin, a fluorine resin, a silicone resin, an epoxy resin, a urethane resin, and UV.
15. A resin (ultraviolet curing resin), natural rubber, butyl rubber, vinyl chloride resin, phenol resin, ABS resin, PS resin, styrene resin, polyamide resin, or inorganic glass. The push button described. 17. The push button according to claim 14, wherein the surface of the photocatalyst particles is covered with any one of a photoinactive substance, a porous wall made of the photoinactive substance, and apatite of ceramics. 18. The method according to claim 1, wherein the photoinert substance is any one of silicon, aluminum, zirconium, calcium, barium, strontium, magnesium, zinc and niobium or a combination thereof.
7. The push button according to 7. 19. A push button comprising a film sheet provided with a photocatalyst on its surface. 20. A push button, wherein a liquid member is applied to the surface of a base material, and then photocatalyst particles are sprayed on the liquid member and fixed to the surface of the base material. 21. The photocatalyst particles are pressed and at least a portion is embedded in the surface of the liquid member.
The push button described. 22. The push button according to claim 19, wherein the photocatalyst is titanium oxide particles in anatase crystal form. 23. The push button according to claim 22, wherein the surface of the photocatalyst particles is covered with any one of a photoinactive substance, a porous wall made of the photoinactive substance, and apatite of ceramics. 24. The photo-inert substance is any one of silicon, aluminum, zirconium, calcium, barium, strontium, magnesium, zinc and niobium or a combination thereof.
3. The push button according to 3.