JPS62297242A - Production of anti-fogging mirror - Google Patents

Abstract

PURPOSE:To produce an anti-fogging mirror having excellent heat-conductivity at a low cost without using glass fiber and preventing the peeling off of paint, by applying an electrically conductive paint to the reverse face of a mirror, attaching a pair of specific thin electrode plates to both ends of the paint layer and coating the conductive layer with a resin. CONSTITUTION:A silvering layer 3 is applied to the back face of a glass plate 2 and is covered with a backing layer 4 to form a mirror 1. The back face 5 of the mirror is coated with an electrically conductive paint composed of e.g. a mixture of granular or powdery carbon and an adhesive to form an electrically conductive paint layer 6 leaving a margin having a specific width at the periphery of the mirror. Thin electrode plates 7, 8 made of e.g. copper foil are attached to both oppositing edges of the layer 6 along the whole length and the ends of the electrodes are connected to feeding terminals 9, 10. The back face 5 of the mirror 1 is coated with a resin covering the exposed face of the layer 6 and the thin plates 7, 8 while leaving the terminals 9, 10 uncoated. The objective anti-fogging mirror 12 having a resin layer 11 over the whole back face can be produced by this procedure.

Description

DETAILED DESCRIPTION OF THE INVENTION 8. Detailed Description of the Invention Field of Industrial Application The present invention relates to a method of manufacturing an anti-condensation mirror to be installed, for example, in a washroom or bathroom.

2. Prior Art Conventionally, as a dew prevention mirror, for example,
As seen in Japanese Patent No. 166, a heating wire is attached to the back surface of the mirror, or as seen in Japanese Utility Model Application Laid-open No. 59-159376, a heater plate is attached to the back surface of the mirror. Here, as a heater plate, for example, as shown in FIG. It has a structure in which the power supply terminal (to) connected to plate 44 is exposed, both sides are hardened with 1 resin layer (to), and a protective film @4 is pasted on the surface of the resin layer (to). ing. Such a heater plate 4 is used by removing the protective film 4 and then attaching and fixing it to the back surface of the mirror.

Problems to be Solved by the Invention According to the above conventional configuration, glass fiber (1) is used to obtain the slackness of the heater plate, and a resin layer (1) is further formed on both sides for insulation. Therefore, it is expensive overall. In addition, when the heater plate @ is attached to the back of a mirror, it tends to lift up due to the uneven back surface or due to poor adhesion over time, resulting in poor heat conduction. Ta.

The purpose of the present invention is to provide a method for manufacturing a dew condensation prevention mirror that does not require the use of glass fibers (and only requires resin coating on one surface), and that can be fixed to the mirror surface without causing any lifting. It is in the point of providing.

Means for solving the problem and description In order to solve the problem, the method for manufacturing an anti-condensation mirror according to the present invention is to apply a conductive paint to the back surface of the mirror, and to connect a pair of electrodes to both ends of the conductive paint layer. A thin plate is provided to cover the exposed surfaces of the conductive paint and the electrode thin plate, and the mirror surface is coated with a resin, with the power supply terminal connected to the electrode thin plate exposed.

Operation According to the above configuration, by applying a power supply voltage to the electrode thin plate via the power supply terminal, a current flows in the conductive paint layer located between the two electrode thin plates.

The conductive paint layer generates heat due to its resistance value, warming the mirror.

EXAMPLE An example of the present invention will be described below with reference to FIGS. 1 to 4.

The mirror (1) is fζ as shown in Figure 1, and the glass plate (2) G
l) Layer the silver slippers (3) on the back side, and then add a backing layer (
4) is formed by laminating. First, the back side (5) of this mirror (1), that is, the exposed surface of the backing layer (4), is coated with conductive paint as shown in Figures 1 and 2 to form a conductive paint layer (6). form. This conductive paint is a mixture of, for example, powdered carbon and adhesive, and is applied over an area that resembles the shape of the gun (1) in a small size. Therefore, there is an unpainted area over the entire width of the periphery of the back surface (5). Next, as shown in FIGS. 1 and 8, electrode thin plates (7)+8) made of copper foil or the like are disposed at both ends of the conductive chamber material layer (6) over the entire length fζ. This casting is done in connection with the conductive paint layer (6) and glued to the back side (5). Both electrode thin plates (7) +8+ terminals have the same terminal (9)
II) is connected. Although this power supply terminal (9) is shown in the form of a plate, it may be in the form of a lead wire. Then the first
As shown in FIG. Tree 1 on the back side (5)
After that, coat it and laminate a resin layer (b) on the entire surface. As a result, a condensation-preventing mirror □□□ can be obtained.

A cord having a plug is connected to the power supply terminal (9) Of), and the connection portion thereof is suitably insulated and sealed. Note that a power supply method using a battery may also be used.

According to the embodiment described above, by applying the power supply voltage to the electrode thin plate (7) +8) via the head of the power supply terminal (9).

A current flows in the conductive paint layer (6) located between the two electrode thin plates (7) +8), and the conductive paint layer (6) generates heat due to the resistance value of the conductive paint layer (6). Te mirror (1)
(to warm up) to warm up. This prevents dew condensation on the surface of the mirror (1).

The resistance value, which is the basis of the heat generation temperature, is determined by the composition of the conductive paint, the size of the conductive φ material layer (6), etc.

Advantages of the Invention According to the present invention, it is possible to integrate a heat generating device made of a conductive paint layer and a thin electrode plate on the back surface of a mirror, and the integrated state can be firmly maintained by the resin coating.

Therefore, glass fibers can be made unnecessary, and a small amount of resin coating can be used on only one surface by utilizing the insulating properties of the mirror, making it possible to reduce the overall cost. Furthermore, by integrating the pressing shape with the resin coating, it is possible to prevent the conductive paint from peeling off (floating) on the mirror surface, and good heat transfer is always possible.

[Brief explanation of drawings]

1 to 4 show one embodiment of the present invention, in which FIG. 1 is a partially cutaway perspective view, FIGS. 2 to 4 are longitudinal sectional views of main parts showing the manufacturing step, and FIG. The figure is a partially cutaway perspective view showing a conventional example. (1)...Mirror, (2)...Glass plate, (3)-...
Silver coating layer, (4)...backing layer, (5)...back side,
Shout: Conductive material, (7) +83: Electrode thin plate, (9) αQ: Power supply terminal, αυ: Resin layer, (
6)...Anti-condensation mirror

Claims (1)

[Claims] 1. Apply conductive paint to the back of the mirror, arrange a pair of electrode thin plates connected to both ends of this conductive paint layer, cover the exposed surfaces of these conductive paint and electrode thin plates, and connect to the electrode thin plates. A method for manufacturing an anti-condensation mirror, characterized in that the reverse side of the mirror is coated with a resin, with a power supply terminal exposed.