JP2940465B2 - Manufacturing methods for electronic devices and molded products - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of using a photocatalyst or an antibacterial member, and more particularly, to a method of using a photocatalyst or an antibacterial member on at least one surface of a housing or an image display, and attaching an organic substance (acetaldehyde or Electronic devices (such as audio / video equipment) that have the decomposing, disinfecting, and deodorizing effects of ammonia, dirt, oil smoke, cigarette smoke, etc.
About.

[0002]

2. Description of the Related Art Images such as display devices such as personal computers and computer terminals, television receivers using a CRT (cathode ray tube) or liquid crystal panel, and projection type television receivers for enlarging and projecting the image on a CRT or liquid crystal panel. Devices and measuring instruments, or audio devices such as FM character multiplex radio, stereo, boombox, MD (minidisc), and the like, dislike oil smoke, cigarette smoke, hand grease, or dust adhering to them.

[0003] The reason is that there is a possibility of causing a failure or poor electrical connection. In order to avoid these problems, it is desirable to reduce the number of openings as much as possible in order to protect the electronic circuit housed in the housing (cabinet), and to prevent the invasion of oily smoke, cigarette smoke and dust (dust). But,
A minimum heat radiating hole is required due to heat generation of a CRT, a video control circuit and the like housed inside. Oil smoke, cigarette smoke, dust and the like enter through the heat radiation holes. Also, it adheres to the surface of the CRT or the housing. Occasionally produces a stench.

Conventionally, dirt adhering to the surface of an image display such as a CRT or a casing has been manually wiped off with a detergent or the like.

[0005]

However, according to the above-mentioned method, dirt and foul odors such as organic substances adhering to the surface of the audio / video equipment are manually removed, and are not automatically decomposed and removed.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an audio / visual apparatus having a decomposing action, a disinfecting action, and a deodorizing action for oily smoke, cigarette smoke, organic matter, and scales attached to the surface of a CRT or a casing.

[0007]

In order to solve the above-mentioned problems, an electronic device such as an audio / visual device according to the present invention has a structure in which powder particles of a photocatalyst or an antibacterial member are provided on the surface of the audio / visual device. It is characterized by removing contaminants and odors attached to the surface by receiving ultraviolet rays, or preventing the growth of bacteria attached to the surface.

As an example of a specific means for providing a photocatalyst or an antibacterial member on the surface, an adhesive containing a photocatalyst or an antibacterial member is applied to the surface of an audio / video device.

As another means, in a process of molding a housing (cabinet) or an image display body, for example, an injection molding process, powder particles of a photocatalyst or an antibacterial member are applied to the surface of a molding material such as a resin member or a glass member. It is configured to be installed.

As an adhesive containing a photocatalyst or an antibacterial member, a thermosetting acrylic resin member (for example, acrylic melamine resin), an alkyd melamine resin member, a vinyl acetate type, a fluororesin type, a silicon resin type, or One of an organic binder such as an epoxy resin or a UV resin (ultraviolet curable resin) is used.

As the photocatalyst contained in the adhesive, any photocatalyst such as titanium dioxide or a mixture of titanium dioxide and activated carbon may be used.

The surface of the photocatalyst fixed to the surface of the audio / visual equipment is initially covered with the organic binder (eg, acrylic resin adhesive). However, the photocatalyst is 300
By receiving near-ultraviolet light of nm to 400 nm, the organic binder on the side that has received near-ultraviolet light (the surface side in contact with the atmosphere) is decomposed and removed, exposing the photocatalyst. And it functions as a photocatalyst.

By arranging a photocatalyst made of titanium dioxide or a mixture of titanium dioxide and activated carbon on the surface of an image device, it prevents surface dirt, kills surface bacteria, and removes smell.

That is, a photocatalyst that receives near-ultraviolet light of 300 nm to 400 nm from the sun, a fluorescent lamp, an ultraviolet lamp, or the like is activated to oxidize and decompose organic substances, nitrogen oxides, chlorine compounds, and the like.

The coating thickness of the adhesive containing the photocatalyst is set to a minimum of about 0.1 μm to 30 μm. The mixing ratio of the photocatalyst to be mixed with the adhesive is 0.5W
% To 20 W%, and the weight average particle size of the photocatalyst is in the range of 0.01 to 100 μm.

The structure of the photocatalyst is described in, for example,
No. 5853 has been proposed. Here, a highly active photocatalyst is formed by bringing a catalyst carrying a reducing catalytically active component and a photocatalyst carrying an oxidizing catalytically active component into contact with each other, and further contacting a water-repellent substance with one of them. doing.

As a specific example, a component having catalytic activity for a reduction reaction of carbon dioxide such as copper and mercury is supported on a conductive carrier such as carbon black. A component such as silver or platinum having a catalytic activity for oxidizing and oxidizing water is supported on a semiconductor such as titanium dioxide. Then, the two are brought into contact with each other, but recombination of charges is prevented because the active sites are separated. Further, since the water-repellent substance is brought into contact with any of them, the catalyst floats and is present on the surface layer of the aqueous solution to obtain a highly active photocatalyst.

The titanium alkoxide compound is dissolved in an equimolar amount of ethanol or the like, and hydrolyzed by adding hydrochloric acid or the like. The obtained titanium oxide can be formed into any shape without a binder.

The titanium dioxide is preferably an anatase type, but may be a rutile type titanium dioxide metallized with copper, silver, platinum or other metals.

Further, W0 ↓ 2, CdS, SrTiO ↓
2. A photocatalyst may be formed of a semiconductor such as MoS ↓ 2.

According to the present invention, with the above-described structure, it becomes possible to remove organic substances, odors and the like adhering to the surface of a video device without using a special device or manual operation.

That is, when the photocatalyst is exposed to near-ultraviolet rays such as sunlight or fluorescent light, organic substances and nitrogen oxides can be oxidized and captured on the photocatalyst. as a result,
Enable a healthy and comfortable life. In addition, the environment can be improved.

As the time elapses, the photocatalyst mainly covers the active portion of the surface with the product, and the ability to remove contaminants gradually decreases. However, the activity is recovered by wiping with a wet cloth or a chemical cloth.

The form of the antibacterial member included in the adhesive member is any one of a powder particle form and a liquid form. Approximately 0.05 external dimensions of antibacterial member in powder form
The range is from micron meter to about 100 micrometer. The amount added is about 0.5% to 10% by weight.
By disposing the antibacterial member on the surface of a molded article or the like, the survival environment of bacteria attached to the molded article 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 containing 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. A ratio of about 0.3% to about several% by weight is sufficient for embedding as a powder particle on the surface of a molded article, mixing into an adhesive member, or mixing into a solution or water, and a fine particle having a particle size of about 5 μm or less is sufficient. Powder.

The mugwort contains tannin contained in mugwort with antiallergic and antipruritic effects, and chlorophyll (chlorophyll) has fungicidal and bacteriostatic effects. It may be embedded or applied as a microcapsule of about 20 μm and fixed to the surface of the object.

The hinoki cypress plays a role of a preservative that tropilone contained in the hinoki does not attract 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, hinoki or cypress essential oil (essential oil) or metronidazole, or else, 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.

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 an outer shell coating layer is formed on the outer surface thereof, or an organic arsenic complex Vinazine and the like may be mixed at a weight ratio of about 0.5% to about 10%.

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 containing isothiocyanate as an antibacterial component and inclusion in cyclodextrin, or the like may be used arbitrarily.

[0033]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention is an electronic device comprising a photocatalyst and removing contaminants or odors attached to the surface by receiving near ultraviolet rays. The photocatalyst has an action of oxidizing and decomposing contaminants such as organic substances (acetaldehyde, ammonia, oil smoke, cigarette smoke, etc.), nitrogen oxides, chlorine compounds, etc. attached to the surface of the electronic device.

According to a second aspect of the present invention, a photocatalyst is provided on at least one of the housing and the image display, and contaminants or the like adhered to the surface of the housing or the image display by receiving near ultraviolet rays. The electronic device is characterized by removing odors, and has an effect of oxidizing and decomposing contaminants attached to the surface of the electronic device.

According to a third aspect of the present invention, there is provided an electronic apparatus characterized in that a photocatalyst is mixed with a compound to form a housing, and the photocatalyst can be applied to a molded article in a molding process. Has an action.

According to a fourth aspect of the present invention, a photocatalyst is provided on at least one surface of the housing or the image display, and contamination adhered to the surface of the housing or the image display by receiving near ultraviolet rays. An electronic device equipped with a photocatalyst characterized by removing substances or odors,
It has the effect of oxidizing and decomposing contaminants attached to the surface of electronic equipment.

According to a fifth aspect of the present invention, the image display is one of a CRT, a liquid crystal display, a plasma display, an electrochromic display, and a display using a light emitting diode. The electronic device according to claim 4, which has an effect of oxidizing and decomposing contaminants attached to the surface of the electronic device.

Next, according to a sixth aspect of the present invention, there is provided the photocatalyst according to the fifth aspect, wherein the photocatalyst is mainly composed of one of titanium dioxide and a mixture of titanium dioxide and activated carbon. The electronic device has a function of oxidizing and decomposing contaminants attached to the surface of the housing or the image display.

Next, the invention according to claim 7 is an electronic apparatus characterized in that an adhesive containing a photocatalyst is applied to at least one surface of a housing or an image display. It has an effect of oxidizing and decomposing contaminants attached to the surface of the housing or the image display.

Next, the invention according to claim 8 is an electronic apparatus characterized in that a photocatalyst is embedded in at least one of the surface of the housing and the image display. It has the effect of oxidizing and decomposing attached pollutants.

According to a ninth aspect of the present invention, there is provided an electronic device provided with a photocatalyst, wherein an adhesive containing the photocatalyst is applied to at least one surface of a housing or a screen. It has an effect of oxidizing and decomposing contaminants attached to the surface of the housing.

According to a tenth aspect of the present invention, there is provided an electronic device provided with a photocatalyst, wherein the photocatalyst is embedded in at least one surface of the housing or the screen. It has the effect of oxidizing and decomposing contaminants attached to the surface.

An eleventh aspect of the present invention is directed to an electronic apparatus characterized in that an antibacterial member is provided on the surface of the housing to prevent the propagation of bacteria. In comparison, it has the effect of reducing the amount of contamination and improving the bactericidal effect.

Next, an electronic device according to a twelfth aspect is an electronic apparatus characterized in that an adhesive containing an antibacterial member is applied to the surface of the housing, and the electronic device is attached to the surface of the housing. It has the effect of preventing the growth of bacteria.

Next, an invention according to a thirteenth aspect is an electronic apparatus characterized in that an antibacterial member is embedded in the surface of the housing, and prevents the propagation of bacteria attached to the surface of the housing. It has the effect of doing.

Hereinafter, an electronic apparatus according to an embodiment of the present invention will be described by way of an example in which a photocatalyst is provided to a television receiver using a CRT (cathode ray tube) and a projection type television receiver for enlarging and projecting an image on the CRT. This will be described with reference to FIGS.

(Embodiment 1) FIG. 1 is a perspective view of a television receiver 100 according to Embodiment 1 of the present invention. FIG. 2 is a cross-sectional view of a main part of FIG. 1 taken along a cutting line A-A.

The television receiver 100 according to the present invention is shown in FIG.
As shown in FIG. 2, a predetermined electronic circuit board 20 is provided in a housing 2 (cabinet), and a CRT (cathode ray tube) 1, a speaker body 4, and a speaker box 5 are housed in a predetermined manner.

The housing 2 is formed by injection molding a resin member such as polystyrene (PS) into a predetermined shape. Further, the housing 2 has a plurality of fine holes 3 having a diameter of 0.3 mm to 1 mm formed in at least one main surface, for example, the front surface and left and right side surfaces of the housing 2, and a speaker sound emission hole. We arrange area.

The CRT 1 has a photocatalyst 10 on at least one of the front surface, that is, the image display surface side and the inner surface side.
Of the powder particles. In the embodiment of FIG. 1, a CRT provided with a photocatalyst 10 only on the outer surface side on which an image is displayed.
And Of course, a configuration may be employed in which a photocatalyst is provided on the funnel surface other than the image display surface.

Similarly, the structure is such that the powder particles of the photocatalyst 10 are provided on both inner surfaces and outer surfaces of the housing 2. That is, the housing 2 is provided with photocatalysts on the outer surface and the inner surface of the four main surfaces of the top surface, the left and right side surfaces, and the front surface.

Further, a photocatalyst is also provided on both the inner surface and the outer surface of the back cover constituting the rear portion of the housing by screw fastening.

As a first means for providing a photocatalyst on the surface of the CRT 1 and the housing 2, an adhesive containing the photocatalyst is applied to the surface.

As described above, the adhesive containing the photocatalyst is a thermosetting acrylic resin member (for example, acrylic melamine resin), an alkyd melamine resin member, a vinyl acetate resin, a fluorine resin resin, a silicon resin resin, or It is made of any one of a synthetic resin member (or an organic binder) such as a urethane resin type, a polyester resin type, a phenol resin type, and a polyvinyl chloride type.

As the photocatalyst contained in the adhesive, for example, any photocatalyst such as titanium dioxide or a mixture of titanium dioxide and activated carbon may be used.

The coating thickness of the photocatalyst layer is at least about 0.3 μm to 30 μm.

The mixing ratio of the photocatalyst to be mixed with the adhesive is 0.5
W% to 20 W%, and the weight average particle size of the photocatalyst is 0.01%.
The range is from micron meter to 40 micrometer.

Preferably, the thickness is 20 μm to 40 μm, which also serves as antireflection. When a photocatalyst made of titanium dioxide is used also as an anti-reflection film, spray-coat titanium dioxide using alcohol as a solvent and apply
What is necessary is just to form irregularities on the image display surface of the RT.

In addition to the above adhesive, a method using an epoxy resin-based adhesive may be used as a method for supporting titanium dioxide particles. In this case, the titanium dioxide particles are impregnated with water, dispersed in an adhesive containing an epoxy resin, and then applied to the surface of a CRT and a housing constituting an image device. And
After primary drying at 30 to 50 degrees Celsius and evaporating the thinner, secondary drying is performed at 80 to 200 degrees Celsius to form a photocatalytic layer.

It goes without saying that any means such as dip coating, spray coating, electrostatic coating, powder coating, screen printing or tampo printing may be used as the coating method.

The same applies to the case where the titanium dioxide particles may be dispersed and applied to the portion corresponding to the dispersion medium of the pigment, that is, the portion (vehicle) corresponding to the transparent adhesive.

Furthermore, in addition to using the above-mentioned adhesive as a means for supporting the photocatalyst on the surface of the CRT and the housing, an organic adhesive or a water-soluble adhesive may be used for fixing. . Alternatively, the UV resin may contain powder particles of the photocatalyst and be applied to the surface of the CRT and the housing.

Further, as a second means for providing a photocatalyst on the outer surface of the housing 2, as shown in FIG. 5, a method of applying or embedding powder particles of the photocatalyst on the surface of a molded article in the process of injection molding is used. May be.

FIG. 5 is a sectional view of a main part showing the concept of an injection molding apparatus. In FIG. 5, after a resin for forming a housing is injected into a cavity of a pair of molds including a fixed mold 122 and a movable mold 123. Then, the movable mold 123 is retracted by a small amount (δ = several tens μm to several hundreds μm) to a position indicated by a two-dot chain line to provide a gap on the side constituting the inner surface of the housing (not shown). By injecting a gas containing powder particles of the photocatalyst from the photocatalyst injecting device 41D into the space, a photocatalyst coating layer is formed on the inner surface of the housing.

The particle diameter of the powder of the photocatalyst contained in the gas is 0.1.
The range is from 01 micrometer to 100 micrometer.

The timing of injecting the gas containing the photocatalyst into the inner surface of the gap is arbitrarily performed. For example, when a gas containing powder particles of a photocatalyst is injected, the injection is performed before the resin in the mold cavity is cooled and solidified.

As a matter of course, a gas containing a photocatalyst may be injected after the resin is cooled and solidified. In this case, a binder, an adhesive resin, a diluting solvent, or the like may be included in the gas so that the photocatalyst does not peel off from the adhesion surface.

When the high-pressure gas containing the photocatalyst does not contain the binder, the adhesive resin, or the diluting solvent, after the injection, the retreated mold is advanced again to press the photocatalyst-coated surface, and the photocatalyst layer is pressed. It may be embedded in the surface of the molded article or in the vicinity of the surface.

Further, the nozzle for injecting the photocatalyst is not limited to one, and may be arbitrarily arranged at a plurality of locations. As the solvent, any solvent such as alcohol, toluene, thinner, and acetone, and as the adhesive, epoxy resin, acrylic resin, vinyl chloride resin, ABS resin, PS resin, polyamide resin, polycarbonate resin, styrene resin, etc. A predetermined amount of any resin member may be included.

Further, as a member that can be injection-molded to constitute a molded product (housing), any member other than the above may be arbitrarily implemented.
For example, a resin member such as ABS, PS, PP, PE, or PET may be used. Of course, it may be a biodegradable plastic. For example, a denatured protein material such as gluten, a material obtained by kneading paper and denatured protein, an agar material, a material obtained by kneading potato starch with water, a natural polymer Novamont (trade name: Materby / Nippon Synthetic Chemical Industry), a microorganism-producing material Polyester-based ICI (trade name: Biopol / ICI Japan), chemically synthesized aliphatic polyester (trade name: Bionole / Showa Kobunshi), and the like may be used arbitrarily.

According to the present invention, the characteristics of the resin member used for injection molding are not changed by the above configuration. For example,
An arbitrary structure or a curved surface shape can be configured according to the variety of designs and the purpose of use without changing the molding characteristics of the resin member. Further, the quality of the molded product does not deteriorate.

Further, a coating layer of the photocatalyst can be formed in the process of injection molding, and the operation for forming the coating layer is not required. Therefore, the process can be simplified and the cost can be reduced.

The photocatalyst provided on the surface of the video equipment is activated by receiving near ultraviolet rays of 300 nm to 400 nm such as the sun, a fluorescent lamp and an ultraviolet lamp, and oxidizes and decomposes organic substances, nitrogen oxides, chlorine compounds and the like.

As the structure of the photocatalyst, for example,
No. 5853 has been proposed. Here, a highly active photocatalyst is formed by bringing a catalyst carrying a reducing catalytically active carbon component and a photocatalyst carrying an oxidizing catalytically active carbon component into contact with each other, and further contacting a water-repellent substance with one of them. doing.

As a specific example, a component having catalytic activity for the reduction reaction of carbon dioxide such as copper and mercury is carried on a conductive carrier such as carbon black. In addition, a component such as silver or platinum having a catalytic activity for oxidizing water is supported on a semiconductor such as titanium dioxide.

Then, the two are brought into contact with each other, but recombination of charges is prevented because the active sites are separated. Further, since the water-repellent substance is brought into contact with any of them, the catalyst floats and is present on the surface layer of the aqueous solution to obtain a highly active photocatalyst.

As the pressure fluid, other than compressed air, nitrogen gas, inert gas (for example, argon gas) or the like may be used arbitrarily.

As described above, the television receiver (video equipment) according to the first embodiment of the present invention removes organic substances, odors, and the like adhering to the surface of a CRT or a housing without using a special device or manual operation. Becomes possible.

(Embodiment 2) FIG. 3 is a vertical sectional view showing the concept of a projection television receiver 200 according to Embodiment 2 of the present invention. FIG. 4 is a sectional view of a main part of a CRT, an optical system, and a transmission screen 31 constituting the projection television receiver 200 of FIG.

In FIG. 3, reference numeral 31 denotes a transmission screen, 32 denotes a CRT, 33 denotes a lens optical system, 34 denotes a mirror, 35 denotes a housing, and 10 denotes a photocatalyst.

As shown in FIG. 4, the transmission type screen 31 used for the projection type television receiver 200 has a red light,
CRT32R as projector of green light and blue light, 3
A configuration composed of a total of two sheets: a condensed Fresnel lens sheet 41 for light emitted from 2G and 32B, and a lenticular lens sheet 42 for imaging the light from the Fresnel lens sheet 41 therein and diffusing it horizontally. A total of three components including the flat panel 43 is generally used.

In FIGS. 3 and 4, the housing 35 is provided with photocatalyst powder particles on at least one of the surface, that is, the outer surface and the inner surface. In the embodiment of FIG. 3, a photocatalyst is provided on each of the main surfaces on the outer surface side of the top surface, the front surface, the left and right side surfaces, and the rear surface.

The photocatalyst 10 is provided on the light incident side of the Fresnel lens sheet 41 constituting the transmissive screen and on both main surfaces of the flat panel 43.

The first means for providing a photocatalyst on the surfaces of the housing 35 and the transmission screen 31 is to apply an adhesive containing the photocatalyst.

Embodiment 1 as an adhesive containing a photocatalyst
As described in, a thermosetting acrylic resin member (for example, acrylic melamine resin) or an alkyd melamine resin member, or vinyl acetate, or a fluorine resin, or a silicone resin, or a urethane resin or a polyester resin, or It is made of any one of a synthetic resin member (or an organic binder) of a phenol resin type, a polyvinyl chloride type, or an epoxy resin type.

As a photocatalyst to be contained in the adhesive, any photocatalyst such as titanium dioxide or a mixture of titanium dioxide and activated carbon may be used.

The minimum thickness of the photocatalyst layer is about 0.3 μm to 30 μm.

The mixing ratio of the photocatalyst to be mixed with the adhesive is 0.5
W% to 20 W%, and the weight average particle size of the photocatalyst is 0.01%.
The range is from micron meter to 10 micrometer. These configurations are the same as in the first embodiment, and the same applies to the action of the photocatalyst.

That is, the case 35 and the transmissive screen 3
The photocatalyst provided on the surface of 1 is 300nm, such as the sun or fluorescent light
It is activated by receiving near-ultraviolet light of about 400 nm, and oxidizes and decomposes and removes offensive odors or pollutants such as organic substances, nitrogen oxides, chlorine compounds and the like attached to the surfaces of the casing 35 and the transmission screen 31.

Further, the housing 35 and the transmissive screen 31
As a second means for providing a photocatalyst on the surface of the molded article, as shown in FIG. 5, a method of applying or embedding powder particles of the photocatalyst on the surface of a molded article in the process of injection molding is used. Since the molding method has been described in the first embodiment, repeated description will be avoided.

It is needless to say that a photocatalyst may be provided on the inner surface side of the housing 35 in a predetermined manner. Further, a photocatalyst may be provided on the surface of the lenticular lens or the other main surface of the Fresnel lens sheet.

A projection type television receiver (video equipment) equipped with a photocatalyst is 300 nm to 400 nm such as the sun or a fluorescent lamp.
m, which is activated by receiving near ultraviolet rays, and oxidizes, decomposes and removes foul odors or pollutants such as organic substances, nitrogen oxides, chlorine compounds, etc. attached to the housing and the surface of the transmission screen.

It is needless to say that the electronic device may be of any shape and any device, in addition to a video device such as a television receiver using a CRT or a projection type television receiver. .

For example, the image display is any one of a liquid crystal display, a plasma display, an electrochromic display, and a display using a light emitting diode, and the image display and the image display are stored. The photocatalyst may be provided on the surface of the housing. Of course, the same applies to the case where the video device may be a measuring device that displays characters, waveforms, and various figures.

Further, a small liquid crystal television of 3 to 6 inches,
A video tape recorder (VTR) having a liquid crystal display,
The same applies to a video camera having a liquid crystal display, a compact camera having a liquid crystal display, a word processor, a notebook computer, and the like.

Further, not only video equipment but also audio equipment such as FM character multiplex radio, stereo, boombox, CD player (compact disc player), MD (mini disc), mobile phone, PHS (personal handy phone system), etc. The same is true for

Further, as a member provided in the electronic device,
It is the same that an antibacterial member may be used instead of the photocatalyst.

Alternatively, powder particles of a photocatalyst or an antibacterial member may be mixed with a compound and injection-molded. In this case, if the proportion of the photocatalyst or the antibacterial member exposed on the surface of the molded article is small, the functional efficiency is reduced.

[0099]

As described above, the electronic device according to the present invention oxidizes odors or pollutants, such as organic substances and nitrogen oxides, attached to the surface and captures them on the photocatalyst, and disassembles them without using any special device or manpower. , Can be removed. Further, it can be used for a long time in a cooking room where oil smoke is generated, a conference room where a large amount of cigarette smoke is generated, and the like. Also, the propagation of bacteria attached to the surface of the electronic device is prevented.

Further, compared with the case where the photocatalyst or the antibacterial member is provided only on the surface of the electronic device, the amount of use can be reduced, compared with the case where the photocatalyst or the antibacterial member is mixed only with the compound and the housing or the like is injection molded. Can be improved.

[Brief description of the drawings]

FIG. 1 is a perspective view of a television receiver according to Embodiment 1 of the present invention.

FIG. 2 is a cross-sectional view of a main part of FIG. 1 taken along a cutting line A-A.

FIG. 3 is a sectional view of a projection television receiver according to a second embodiment of the present invention.

FIG. 4 is a cross-sectional view of a main part of a CRT, an optical system, and a transmission screen that constitute FIG. 3;

FIG. 5 is a sectional view of a main part of a molding apparatus used for molding the first and second embodiments of the present invention.

[Explanation of symbols]

1, 32, 32R, 32G, 32B CRT (cathode ray tube) 2, 35 Housing (cabinet) 3 Microhole (sound emission hole for speaker) 4 Speaker body 5 Speaker box 10 Photocatalyst 31 Transmission screen 33 Lens optical system 34 Mirror 41D Photocatalyst injection device 100 Television receiver 121 Molded product 122 Fixed type 123 Movable type 124 Cylinder 150 Mold 200 Projection type television receiver

Continuation of the front page (51) Int.Cl. ⁶ identification symbol FI H04N 5/64 571 H04N 5/64 571Z // H05K 10/00 H05K 10/00 (58) Fields surveyed (Int.Cl. ⁶ , DB name ) H05K 5/02 A01N 55/02 B01J 21/06 B01J 35/02 G09F 9/00 H04N 5/64

Claims (3)

(57) [Claims] 1. A photocatalyst is provided on the surface of a molded article in the process of injection molding by injecting a gas containing powder particles of a photocatalyst after injecting a resin into a cavity of a mold. Characteristic method of manufacturing molded products. 2. The method according to claim 1, wherein one of the binder and the resin member is contained in the gas. 3. The molded product is any one of a Fresnel lens sheet, a lenticular lens sheet, and a flat panel forming a housing of an electronic device or a transmission screen. 2. The method for producing a molded article according to claim 1.