JPH09405A - Defogging surface mirror and its production - Google Patents

Abstract

PURPOSE: To obtain a defogging surface mirror having a well mirror finished surface without receiving the influence of heat by combining a reflection material coating consisting of a heat resistant material constituting the mirror finished surface and a colorless and transparent protective hard coating having the heat resistance to cover the entire surface thereof with the surface of planar glass. CONSTITUTION: Slender sheet-like electrodes 2a, 2b which are installed on the surface of a conductive film 7 apart prescribed intervals and to which electric power is supplied and the insulating coating 3 consisting of an inorg. raw material or org. raw material covering the entire surface of the conductive film 7 are formed on a mirror body member 1 formed with the thin film-like conductive film 7 by impregnation or film formation of the conductive material on one surface of the transparent planar glass 6. The reflection material coating 4 consisting of the heat resistant material formed in such a manner as to constitute the mirror finished surface and the colorless and transparent protective hard constituting 5 which is formed to cover the entire surface of this coating and has the heat resistance are formed in combination on the surface of the planar glass 6. As a result, the reflection material coating 4 on the surface is not affected by the heat at the time of electrode baking and the cleanly mirror finished surface is obtd.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention heats a surface of a mirror installed in a place with a large amount of water vapor, such as a bathroom or a washroom, or a place with a large change in environmental temperature. With respect to a defrosting mirror that is removed or prevented by the method described above, in particular, in the case of a surface mirror formed by subjecting the surface of the mirror body member to mirror surface processing, the back surface side of the mirror body member is directly heated, and fogging of the surface of the mirror body is performed in a short time. The present invention relates to a defrosting surface mirror that can be removed and can be removed uniformly, and a method for manufacturing the same.

[0002]

2. Description of the Related Art A conventional defrosting surface mirror of this type is formed of an insulating material into a plate shape, as proposed by the present inventors in Japanese Patent Application No. 7-84594. A mirror body member in which a conductive material is integrally formed over substantially the entire back surface, and an elongated body which is installed on the back surface of the mirror body member at a predetermined interval and is connected to the conductive material and is supplied with power from a power source. A combination of a thin plate electrode, a reflective material coat formed on the surface of the mirror body member so as to be a mirror surface, and a transparent and hard protective coat formed on the entire surface of the reflective material coat. The conductive material of the mirror body member is heated by heating the conductive material from the electrodes.

Here, the mirror body member is specifically
It is made of conductive glass in which a thin conductive film is integrally formed by impregnating or film-forming a conductive material on the back surface of a transparent glass plate having a thickness of about 3 to 8 mm. Also, the electrodes are
Power is supplied to the conductive film of the mirror body member, and is formed of a conductive material such as silver, copper, or aluminum in the shape of an elongated thin plate, and both ends of the conductive film are separated by a predetermined distance. It is installed in. Further, the reflective material coat is formed on the surface of the mirror body member and serves as a reflective surface of the mirror. For example, it is formed by coating a silver-based material such as silver nitrate in a film shape or depositing aluminum on a vapor deposition film. Has been done.

[0004]

However, in such a conventional defrosting surface mirror, the reflective material coat formed on the surface of the mirror main body member and serving as the reflecting surface of the mirror does not contain a silver-based material such as silver nitrate. Since it was formed by coating in a film form or by depositing aluminum on a vapor-deposited film, in order to install an electrode on the surface of the conductive film on the back surface of the mirror body member, the electrode material was heated at a high temperature of 400 ° C. or higher When baked in, the heat affected silver-based materials and aluminum, which are not very heat resistant. That is, on the reflective substance coat formed on the surface of the mirror body member, the reflective substance may be peeled off from the mirror body member due to high temperature, film cloud may be generated, or film spots having small irregularities on the film surface may be generated. there were. Therefore, the finish of the mirror surface, which is most important as a mirror, is not good, and it may not be practically used as a mirror.

Therefore, the present invention addresses such a problem, and even if the electrode material is baked at a high temperature on the back surface of the mirror body member having the reflecting substance coat and the protective hard coat formed on the surface, the reflection of the above-mentioned surface occurs. An object of the present invention is to provide a defoaming surface mirror in which the material coat and the protective hard coat are not affected by heat and the mirror finish of the surface is clean, and a method for producing the same.

[0006]

In order to achieve the above object, the defrosting surface mirror according to the first aspect of the present invention is a thin plate-shaped conductive glass obtained by impregnating or film-coating a transparent plate-shaped glass with a conductive material on one side. A mirror body member integrally formed with a film, an elongated thin plate electrode provided on the back surface of the mirror body member on the surface of the conductive film at a predetermined interval and supplied with power from a power source, and this electrode An insulating coat made of an inorganic material or an organic material formed by covering the entire surface of the conductive film on the back surface of the installed mirror body member, and a mirror surface on the surface of the plate-shaped glass on the surface of the mirror body member. The above-mentioned electrode is formed by combining a reflective material coat formed of a heat-resistant material as described above and a heat-resistant colorless transparent and hard protective hard coat formed over the entire surface of the reflective material coat. To the conductivity of the mirror body member It is obtained so as to heat the conductive film by energizing the.

The reflective material coat is made of chrome, nickel or titanium.

Further, an antireflection layer for suppressing irregular reflection of the reflective material coat is formed by coating a material having a different light refractive index between the reflective material coat and the protective hard coat or on the surface of the protective hard coat. Good.

In the method for manufacturing a defrosting surface mirror according to the second aspect of the present invention, a thin plate-like conductive film is integrally formed by impregnating or film-forming a conductive material on one surface of transparent plate glass. The mirror body member is placed in the chamber of the sputtering apparatus, and the surface of the plate-like glass on the opposite side of the mirror body member on which the conductive film is formed is coated with a heat-resistant reflective material and a heat-resistant material. A colorless and transparent protective hard coat with a hard coat and, if necessary, an antireflection layer is formed by a sputtering method, and then the mirror body member on which the above coats are formed is taken out from the chamber of the sputtering device and cut into various mirror sizes. Then, the thin and thin plate-like electrodes are arranged at a predetermined interval on the surface on which the conductive film is formed on the back surface of the mirror main body member cut into the individual mirror sizes, and the electrodes are baked at a high temperature to conduct the above-mentioned conductivity. The electrode is bonded and fixed, it consists in subsequently formed on the entire surface consisting of an inorganic material or an organic material insulating coating of the conductive film The electrode at the back surface of the installed mirror body member.

[0010]

The defrosting surface mirror thus constructed has a transparent plate-like glass on one side of which a conductive material is impregnated or formed into a film to integrally form a thin film-like conductive film on the back surface of the mirror body member. Is formed on the back surface side of the mirror body member by supplying electricity to the conductive film of the mirror body member from an electrode provided on the surface of the conductive film at a predetermined interval to heat the conductive film. The conductive film functions as a heater, and the combination of the above-mentioned mirror body member, a reflective material coat made of a heat-resistant material formed to be a mirror surface on the surface thereof, and a protective hard coat formed on the entire surface thereof It operates to heat the surface of the mirror. As a result, the back side of the mirror body member is directly heated, and the heat conducted through the mirror body member evaporates the dew condensation on the surface of the mirror in a short time to remove the fog and also uniformly remove the fog. You can
Moreover, there is no danger of electric shock and it is safe.

In the manufacture of the above defrosting surface mirror, since the reflecting substance coat and the protective hard coat on the surface of the mirror body member are made of a heat-resistant substance, the electrode material is coated on the back surface of the mirror body member at a high temperature. Even after baking, the reflecting substance coat and the protective hard coat on the surface are not affected by heat, and a defrosted surface mirror having a fine finish on the mirror surface can be provided.

[0012]

Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. FIG. 1 is a central cross-sectional view showing an embodiment of a defrosting surface mirror according to the first invention, and FIG. 2 is a perspective explanatory view showing a state seen from the back surface side. This defrosting surface mirror removes or prevents by heating the mirror installed in a place with a lot of water vapor such as a bathroom or a washroom or a place where the environmental temperature changes greatly, that the water vapor condenses on the surface and becomes cloudy. As shown in FIG. 1, the mirror body member 1 and the electrode 2
a, 2b, an insulating coat 3, a reflective material coat 4, and a protective hard coat 5 are combined.

The mirror main body member 1 serves as a main body of a defrosting front surface mirror and its back surface side functions as a heater. The back surface of a transparent glass plate 6 having a thickness of about 3 to 8 mm is impregnated with a conductive material. Or it is colorless and transparent and has a thickness of 0.
It is made of conductive glass integrally formed with a thin conductive film 7 having a thickness of 02 to 0.5 μm. Such a conductive glass may be obtained by pasting, on one surface of the plate-like glass 6, a conductive raw material such as tin (Sn) which is made into a fine powder and melted, or applied by spray coating, or the like. It is manufactured by forming the conductive film 7 by attaching it by a roll coating method.
Alternatively, in the plate glass manufacturing process, the plate glass 6 is formed by the CVD method (chemical vapor deposition method) in the process of continuously flowing the molten glass on the upper surface of the tin (Sn) water tank on the float line. Ultra-thin tin oxide film (SnOx) on one side
The conductive film 7 may be integrally formed and manufactured.
In this case, since the conductive film 7 made of the tin oxide film has a thickness of, for example, about 300 to 3000 Å, is almost transparent, and is stable and uniform, the mirror body member 1 of the present invention
The conductive glass as described above is preferably manufactured by the above-mentioned CVD method. The sheet resistance of the conductive film 7 of conductive glass manufactured by this CVD method is, for example, 10 to
It is 1000Ω / □. Therefore, when a current is passed through the conductive film 7 having such a sheet resistance, the conductive film 7 generates heat and functions as a heater.

Electrodes 2a and 2b are provided on the surface of the conductive film 7 on the back surface of the mirror body member 1. This electrode 2
Reference numerals a and 2b are for supplying electric power to the conductive film 7 of the mirror body member 1, and are formed in a thin thin plate shape with a conductive material such as silver, copper, or aluminum, and have a predetermined surface on the conductive film 7. As shown in FIG. 2, they are installed at both end portions with a space therebetween, and power is supplied from a power source (not shown). Therefore, as shown in FIG.
Lead wires 8a and 8b are respectively connected to the end portions of a and 2b, and the plugs 9 provided at the end portions of these lead wires 8a and 8b are connected to a commercial power source such as AC 100V or 240V. It has become. In addition, a switch 1 for turning on the power is provided in the middle of the lead wire 8a or 8b.
0 is provided. In addition, the lead wire 8a or 8b
In the middle of the step, a temperature control circuit having a thermostat may be added to keep the heating temperature of the conductive film 7 constant. Furthermore, a transformer may be inserted in the middle of the lead wires 8a and 8b to boost the power supply voltage without directly connecting to a commercial power supply such as AC 100V or 240V. Furthermore, a timer may be inserted in the middle of the lead wires 8a and 8b to limit the time of power supply.

As shown in FIG. 1, on the back surface of the mirror body member 1 on which the electrodes 2a and 2b are installed, on the surface of the conductive film 7, as shown in FIG.
An insulating coat 3 is provided. This insulation coat 3
In order to prevent electric shock due to the conductive film 7 of the mirror body member 1, one of the inventors of the present invention has proposed “Coating” in a patent application (reference number 070525A) filed on May 25, 1995. And a thin film (for example, 40 to 40 nm) made of an inorganic raw material such as a "composition" and covering the entire surface of the conductive film 7 and the electrodes 2a and 2b by a spray coating method or a roll coating method.
The thickness is 80 μm). Alternatively, the insulating coat 3 may be formed by laminating or physically assembling an insulating film. The insulation coat 3
Further, various insulating layers 12 made of an organic material or an inorganic material may be provided on the back surface side of the above in order to ensure the insulation when the film is attached to the installation surface 11 such as the attachment site of the mirror. The insulating layer 12 is, for example, an epoxy-based or acrylic-based organic paint or inorganic paint.

On the surface of the mirror body member 1, a plate-shaped glass 6 is formed.
The reflective material coat 4 is formed so as to be a mirror surface on the surface. The reflective material coat 4 is used for the mirror body member 1 described above.
It is formed on the surface of the mirror and becomes the reflection surface of the mirror.
It is made of a heat-resistant substance that can withstand a high temperature of 0 ° C. or higher, and is specifically made of a metal such as chrome (Cr) or nickel (Ni) or titanium (Ti). In order to coat the surface of the mirror body member 1 with this heat resistant substance, for example, a thin film may be formed on the surface of the plate glass 6 by using a sputtering method. By forming the reflective material coat 4 made of such a heat-resistant material, even if the electrodes 2a and 2b are baked on the back surface of the mirror body member 1 at a high temperature of 400 ° C. or more, they are not affected by the heat. .

The surface of the reflective material coat 4 formed on the surface of the mirror body member 1 has a heat-resistant property of 400 ° C. or more, for example, and is a transparent and hard protective hard coat 5 which is colorless and transparent.
Covered with. The protective hard coat 5 protects the reflective material coat 4 formed on the surface of the plate-shaped glass 6 from being peeled off or scratched. For example, silicon oxide (SiOx) or titanium oxide (TiOx) is used. Consists of
After forming a film having a thickness of, for example, about 0.2 to 1 μm on the reflective material coat 4, it is colorless and transparent and has a high hardness (for example, JIS K-54).
According to 00-8.4, it has a pencil hardness of 9H or more). The protective hard coat 5 need only be heat-resistant, colorless, transparent, and hard, and need not have insulating properties.

The defrosting surface mirror thus constructed is shown in FIG.
In the above, the insulating layer 12 faces the installation surface 11 such as a bathroom makeup unit or a toilet unit, an attachment site in a bathroom unit, or other appropriate attachment site, and a surface on which the reflective substance coat 4 and the protective hard coat 5 are formed. Is attached to the installation surface 11 so as to face the user side as shown by arrow A. In this case, when the safety of the installation surface 11 side can be ensured, the insulating coat 3
May be omitted.

In order to use the defoaming surface mirror configured as described above, for example, when the mirror surface is fogged by the use of warm water in a state where it is attached to the installation surface 11 such as a washbasin unit, in FIG. The switch 10 is turned on while the plug 9 is connected to a commercial power source (not shown). Then, electric power is supplied to the electrodes 2a, 2b via the lead wires 8a, 8b, and the conductive film 7 on the back surface side of the mirror body member 1 shown in FIG. 1 is energized from these electrodes 2a, 2b. As a result, a current flows through the entire surface of the conductive film 7, and the conductive film 7 generates heat and functions as a heater. Then, the reflective substance coat 4 and the protective hard coat 5 located on the surface of the mirror are heated at the temperature of the conductive film 7 to evaporate the dew condensation adhering to the surface in a short time to uniformly remove the fogging. it can. At this time, as is clear from FIG. 1, since the plate-shaped glass 6 side of the conductive glass as the mirror body member 1 faces the user side facing in the direction of the arrow A, it is temporarily contacted. However, there is no danger of electric shock and it is safe. If the switch 10 is turned on in advance and the conductive film 7 is always energized, it is possible to prevent the mirror surface from being fogged by the use of hot water or the like.

FIG. 3 shows the electrode 2 in the defrosting surface mirror of the present invention.
It is a back surface explanatory view showing the modification of the installation state of a and 2b.
FIG. 3A shows a state in which the electrodes 2a and 2b are installed on the upper side and the lower side of the mirror body member 1, respectively. FIG. 3 (b)
Shows a state in which the electrodes 2a and 2b are installed in a substantially L shape from both side portions of the mirror body member 1 to the upper side portion or the lower side portion. FIG. 3C shows a state in which one electrode 2a is installed so as to surround the periphery of the mirror body member 1 and the other electrode 2b is installed in the central portion of the mirror body member 1.
And FIG.3 (d) has shown an example at the time of applying to a large mirror about the same size as a door or a window,
1 shows a state in which the side portions in the longitudinal direction of the mirror body member 1 and electrodes 2a, 2b having a shape that enters the inside of the mirror body 1 at a right angle from the middle of the side portions are opposed to each other. By doing so, even with a large mirror, electric power can be effectively supplied to the entire surface of the conductive film 7.

FIG. 4 is a central cross-sectional view showing a modification of the embodiment shown in FIG. In this modification, the mirror body member 1 is used.
An insulating coat 3'is also formed on the side end surface of the so as to cover it. In this case, the insulation coat 3 '
Due to the electric insulation of the mirror, it is possible to prevent electric shock on the side end portion side of the mirror.

FIG. 5 is a central transverse sectional view showing a second embodiment of the present invention. In this embodiment, an antireflection layer 13 is formed between the reflective material coat 4 and the protective hard coat 5 on the surface side of the mirror body member 1. This antireflection layer 13
Is a material for suppressing diffused reflection on the surface of the reflective material coat 4 by coating a material having a different light refractive index. For example, silicon oxide (SiOx) or titanium oxide (Ti
Ox) and has high hardness. In this way, the antireflection layer 13 causes the reflective material coat 4
Since diffused reflection on the surface of the is suppressed, the reflectance as a mirror can be improved. The antireflection layer 1
Since No. 3 has high hardness, it is not limited to being between the reflective material coat 4 and the protective hard coat 5, and may be formed as the outermost layer on the surface of the protective hard coat 5. Also in the embodiment of FIG. 5, as in the case of FIG. 4, an insulating coat 3 ′ may be formed on the side end surface of the mirror body member 1 so as to cover it.

FIG. 6 is a central transverse sectional view showing a third embodiment of the present invention. In this embodiment, a plurality of antireflection layers 13a and 13b are formed between the reflective material coat 4 and the protective hard coat 5 on the front surface side of the mirror body member 1.
In this case, for example, silicon oxide (SiOx) or titanium oxide (TiOx) or the like may be formed into a plurality of layers by gradually changing the valence of oxygen ions to further improve the reflectance as a mirror. it can. The plurality of antireflection layers 13a and 13b are not limited to two layers and may be three or more layers. At this time, as a layer structure, SiOx and TiOx may be alternately arranged. Further, since the antireflection layers 13a and 13b have high hardness, the antireflection layers 13a and 13b are formed not only between the reflective material coat 4 and the protective hard coat 5 but also as the outermost layer on the surface of the protective hard coat 5. May be. In the embodiment of FIG. 6 as well, as in the case of FIG. 4, an insulating coat 3 ′ may be formed on the side end surface of the mirror body member 1 so as to cover it.

In the above description, the front surface shape of the mirror body member 1 is shown as a rectangular shape, but the shape is not limited to this and may be any shape such as triangular, polygonal or circular. Further, the mirror body member 1 is not limited to a flat plate shape, but may be a curved surface shape such as a convex curved surface or a concave curved surface, or a bent shape bent at an appropriate angle such as a right angle. Furthermore, the use of the mirror is not limited to that used in a bathroom or a washroom, but it can be used in an atmosphere with a large amount of water, as long as it is necessary to remove or prevent clouding due to condensation of water vapor. It can also be applied to a mirror for use.

FIG. 7 is an explanatory view showing the steps of a manufacturing method as a related invention of the defrosting surface mirror configured as described above. First, in a manufacturing process of a plate-shaped glass (not shown), a large-sized mirror body member 1'in which a thin film-shaped conductive film is integrally formed by impregnating or film-forming a conductive material on one surface of a transparent plate-shaped glass Is manufactured (see FIG. 7A). This is the original material that will be the mirror body member 1 shown in FIG. The mirror body member 1'has a width B of about 100 inches (about 2.54 m) and a length C of about 160 inches (about 4.06 m) according to the width of the chamber of the sputtering apparatus. There is.

Next, the large-sized mirror body member 1'manufactured as shown in FIG. 7A is placed in the chamber of a sputtering apparatus (not shown). Then, the inside of the chamber is evacuated to a predetermined pressure and discharged in this vacuum container to form a plate-like member on the opposite side of the mirror body member 1'on which the conductive film 7 (see FIG. 1) is formed. On the surface of the glass 6, a reflective material coat 4 made of a heat resistant material having a temperature of 400 ° C or higher is formed by the sputtering method, and 400 ° C is also formed on the upper surface thereof.
The transparent and hard protective hard coat 5 having the heat resistance described above is similarly formed by the sputtering method. Further, if necessary, the antireflection layer 13 shown in FIG. 5 or the plurality of antireflection layers 13a and 13b shown in FIG. 6 are formed by a sputtering method.

Then, the material having the coats 4 and 5 and the antireflection layers 13 or 13a and 13b formed on the surface of the mirror body member 1'as described above is taken out from the chamber of the sputtering apparatus, as shown in FIG. As shown in FIG. 7 (b), various mirror sizes 14a, 14b, 14 as products
Cut into c, 14d, and 14e, respectively. This is because it takes a large amount of money to form the reflective material coat 4 and the protective hard coat 5 on the surface of the mirror body member 1'by a sputtering apparatus by a sputtering method, and therefore the state of the large mirror body member 1 ' This is because the manufacturing cost is reduced by collectively forming with, and then cutting into individual mirror sizes 14a to 14e.

Next, the individual mirror sizes 14a to 14e described above.
As shown in FIG. 7C, with respect to the mirror body member cut into pieces, the thin and thin plate-shaped electrodes 2a and 2b are provided on the back surface of the size 14a of one mirror body member on which the conductive film 7 is formed. They are arranged at intervals, and are baked at a high temperature of 400 ° C. or higher, for example, and fixed to the conductive film 7 by adhesion. At this time,
Since the reflective material coat 4 and the protective hard coat 5 (see FIG. 1) formed on the surface of the member of the mirror size 14a are made of a heat resistant material of 400 ° C. or higher, they are not affected by the high temperature baking of the electrodes 2a and 2b. Absent. Such an electrode 2
a, 2b for the back surface of each mirror size 14a-14e,
Bake them individually and fix them with adhesive.

Then, as to the size 14a of the mirror body member on which the electrodes 2a and 2b are installed as described above, as shown in FIG.
As shown in (d), an insulating coat 3 made of an inorganic material or an organic material is spray-coated or roll-coated on the entire surface of the mirror body member 1 (14a) on which the conductive film 7 is formed. Formed into a thin film with about 16
Dry at 5 ° C. If necessary, the insulating coat 3
Various insulating layers 12 made of an organic material or an inorganic material may be provided on the back surface side of the. The insulating coat 3 and the insulating layer 12 are individually formed on the back surfaces of the mirror sizes 14a to 14e. By such a process, the defrosting surface mirror according to the first invention is manufactured. Then, according to such a manufacturing method, it is possible to provide a defoaming front surface mirror whose surface has a fine finish and whose manufacturing cost can be reduced.

Contrary to the steps of FIGS. 7 (a) and 7 (b) described above, first, the large-sized mirror body member 1'is attached to each individual mirror size 1
4a-14e, then cut into individual mirror sizes 14a-
The mirror body member 1 cut into 14e is put into the chamber of the sputtering apparatus, and the individual mirror sizes 14a to 14
The reflective substance coat 4 and the protective hard coat 5 may be formed on the surface of the plate glass 6 of the mirror body member 1 of item e by a sputtering method. When the increase in manufacturing cost can be ignored, the manufacturing may be performed in such a process. FIG.
In the step (d), the step of forming the insulating coat 3 may be omitted if the safety of the mirror installation surface 11 side can be secured.

[0031]

Since the present invention is constructed as described above,
A transparent plate-shaped glass is impregnated or film-coated with a conductive material on one side to integrally form a thin-film conductive film. The conductive film formed on the back surface of the mirror body member acts as a heater by heating the conductive film by heating the conductive film of the mirror body member from the electrodes, and the mirror body member and the mirror surface of the mirror body member have a mirror surface. It is possible to heat the surface of the mirror made of a combination of a reflective material coat made of a heat-resistant material and a protective hard coat formed so as to cover the entire surface. As a result, the back side of the mirror body member is directly heated, and the heat conducted through the mirror body member evaporates the dew condensation on the surface of the mirror in a short time to remove the fog and also uniformly remove the fog. It is safe and there is no risk of electric shock.

In the manufacture of the above defrosting surface mirror, since the reflective material coat and the protective hard coat on the surface of the mirror body member are made of a heat-resistant material, the electrode material is applied to the back surface of the mirror body member at a high temperature. Even after baking, the reflection substance coat and the protective hard coat on the surface are not affected by heat, and it is possible to prevent the generation of film cloud and film shavings as in the conventional case. In addition, formation of a reflective material coat or a protective hard coat on the surface of the mirror body member by the sputtering method,
Since the large mirror body member is collectively formed and then cut into individual mirror sizes, the cost of the sputtering method can be made efficient. Therefore, according to the manufacturing method of the present invention, it is possible to provide a defoaming surface mirror which has a beautiful finish on the mirror surface and can reduce the manufacturing cost.

[Brief description of drawings]

FIG. 1 is a central cross-sectional view showing an embodiment of a defrosting surface mirror according to the first invention.

FIG. 2 is a perspective explanatory view showing a state in which the defrosting front surface mirror is viewed from the back surface side.

FIG. 3 is a back surface explanatory view showing a modified example of an installation state of electrodes in the defrosting surface mirror.

FIG. 4 is a central transverse sectional view showing a modified example of the embodiment shown in FIG.

FIG. 5 is a central transverse sectional view showing a second embodiment of the present invention.

FIG. 6 is a central transverse sectional view showing a third embodiment of the present invention.

FIG. 7 is an explanatory view showing a step of a manufacturing method as a related invention of the defrosting surface mirror.

[Explanation of symbols]

 1, 1 '... Mirror body member 2a, 2b ... Electrode 3, 3' ... Insulating coat 4 ... Reflective substance coat 5 ... Protective hard coat 6 ... Plate glass 7 ... Conductive film 11 ... Installation surface 12 ... Insulating layer 13, 13a , 13b ... Antireflection layer

Claims (4)

[Claims] 1. A mirror body member integrally formed with a thin film-shaped conductive film by impregnating or film-forming a conductive material on one surface of transparent plate glass, and the conductive film on the back surface of the mirror body member. And a thin thin plate-shaped electrode which is installed on the surface of the electrode at a predetermined interval and is supplied with electric power from a power source, and an inorganic material formed by covering the entire surface of the conductive film with the back surface of the mirror body member on which the electrode is installed. An insulating coat made of a raw material or an organic raw material, a reflective substance coat made of a heat-resistant substance formed on the surface of the plate-like glass on the surface of the mirror body member so as to be a mirror surface, and a reflective substance coat on the surface of the reflective substance coat. It is made by combining a heat-resistant colorless transparent hard protective coat formed over the entire surface, and the conductive film of the mirror body member is heated by heating the conductive film from the electrode. Features defrosting table Surface mirror. 2. The defrosting surface mirror according to claim 1, wherein the reflective material coat is made of chrome, nickel or titanium. 3. An antireflection layer for suppressing diffused reflection of the reflective material coat is formed between the reflective material coat and the protective hard coat or on the surface of the protective hard coat by coating a material having a different light refractive index. The defrosting surface mirror according to claim 1 or 2. 4. A large-sized mirror body member integrally formed with a thin-film conductive film by impregnating or film-forming a conductive material on one surface of transparent plate glass is arranged in a chamber of a sputtering apparatus. , The surface of the plate-like glass on the side opposite to the side on which the conductive film of the mirror body member is formed, a reflective substance coat made of a heat-resistant substance, and a colorless and transparent protective hard coat having heat resistance and, if necessary, To form an antireflection layer by a sputtering method, and then take out the mirror body member on which the respective coats are formed from the chamber of the sputtering apparatus and cut into various mirror sizes. Elongated thin plate electrodes are arranged at a predetermined interval on the surface on which the conductive film is formed on the back surface, which is baked at a high temperature to bond and fix the electrode to the conductive film, and then this electrode is installed. A method for manufacturing a defrosting surface mirror, characterized in that an insulating coat made of an inorganic material or an organic material is formed on the entire surface of the conductive film on the back surface of the mirror body member.