JP3225277B2 - Heated mirror - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heater with a heater which is preferably used for bathroom mirrors, vehicle door mirrors and the like, and which removes water droplets, raindrops, dew, ice, etc. for anti-fog or on the mirror surface. About the mirror.

[0002]

2. Description of the Related Art When a vehicle travels during rainfall or snowfall in a cold region, water drops adhere to the rearview mirror or the like and freeze, so that the visibility behind the vehicle becomes insufficient and traveling safety is impaired. Various mirrors have been proposed that can be heated to remove water droplets, ice, and the like adhering to the mirror surface by heating them for the purpose of preventing such problems.

For example, Japanese Utility Model Publication No. 58-28937 discloses a vehicle back in which a heat equalizing plate having a high thermal conductivity is disposed in close contact with the back surface of a head plate, and a heating element is joined to the back surface of the heat equalizing plate. A mirror is disclosed. 62-33
Japanese Patent Publication No. 648 discloses a mirror with a heater in which a flat heater is fixed to the back surface of a mirror main body, and the pattern of the heater is made closer at the periphery of the mirror than at the center. Further, Japanese Utility Model Application Laid-Open No. 4-102599 discloses a planar heating element for a mirror in which a heating region is divided into a plurality of regions by electrodes.

[0004] In the above-mentioned mirror or the planar heating element for a mirror, an electric heating substrate on which a complicated heating resistor pattern or a complicated electrode pattern is formed in order to uniformly heat the entire surface of the mirror so that a good view can be obtained. A method such as fixation to the back surface of the mirror substrate has been adopted. However, in the method using an electric heating substrate separate from the mirror substrate, a complicated heating resistor pattern and an electrode pattern must be designed and manufactured, and there is a problem that the cost is increased. Further, since the mirror substrate is heated by heat conduction from the separate electric heating substrate, there is a problem that thermal efficiency is poor and it takes a long time to remove water droplets and the like. Therefore, as disclosed in Japanese Utility Model Laid-Open No. 5-13872, a mirror with a heater in which a reflecting film and a heating resistor are formed on the surface of a mirror substrate and an overcoat layer for insulation is provided on the surface of the reflecting film and the heating resistor. Has been proposed.

[0005]

However, when the reflection film and the heating resistor are formed on the mirror substrate surface, the thermal efficiency is improved, but the temperature of only the central portion of the mirror easily rises.
It takes a long time to remove water droplets and the like at the end. Further, in order to heat the entire surface of the mirror, each electrode wire is provided in the vicinity of a peripheral portion of the mirror substrate. In particular, a mirror for a vehicle is not a circular or rectangular mirror substrate. The one having a small inner angle portion (narrow angle portion) and a larger portion (wide angle portion) formed by the outer edge of the mirror substrate, such as a substantially parallelogram, a substantially trapezoid, a substantially elliptical shape, or a substantially diamond shape, is used. Therefore, the end of the electrode wire is located at the narrow angle portion or the wide angle portion. In such a case, particularly in the vicinity of the wide-angle portion is easily heated, and in order to quickly remove water droplets and the like in a narrow-angle portion that is difficult to be heated, a large amount of power must be supplied, and not only is efficiency inefficient, but also However, overheating of the wide-angle portion may cause disasters such as burning and deformation of peripheral parts such as a resin holder and burns due to human contact.

[0006]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems . First summary
A reflective film on a mirror substrate having a narrow-angle portion and a wide-angle portion.
Heating resistor film, or reflection film and heating resistor film are formed
And a plurality of electrodes for energizing and heating the heating resistor film.
In a mirror with heater provided with electrodes consisting of wires,
The electrode is opposed to at least the wide-angle side of one electrode wire.
Forming a convex portion toward the electrode line to be
Do not form a protrusion on the narrow angle side of the other electrode wire facing the protrusion.
Mirrors with heaters,
You. A second aspect is a mirror base having a narrow-angle portion and a wide-angle portion.
A reflective film and a heating resistor film, or a reflective film and a heating resistor
To form an antibody film and to heat and heat this heating resistor film
Mirror with heater provided with electrodes consisting of multiple electrode wires
Wherein the electrode has at least a wide angle of one electrode wire
When a convex portion facing the electrode line is formed on the
At the narrow-angle side of the other electrode wire facing the wide-angle side projection.
Protrusions are formed, and the opposing parts of both convexes are
The width of the wide-angle portion-side convex portion is linear, and the narrow-angle portion-side convex portion is
Characterized by being wider than the width of the heater
And The third aspect has a narrow-angle portion and a wide-angle portion.
A reflection film and a heating resistor film or a reflection film and a reflection film on a mirror substrate
And a heating resistor film, and heat and heat the heating resistor film
Heater provided with electrodes consisting of multiple electrode wires
In the mirror provided with, the electrode has at least one electrode line.
A convex portion facing the opposite electrode line is formed on the wide angle portion side.
And the narrow angle of the other electrode line facing the wide-angle portion side convex portion.
A convex portion is formed on the side of the convex portion, and both convex portions are opposed to each other.
The portion is curved, and the radius of the arc of the convex portion on the wide-angle portion side
Is larger than the radius of the arc of the narrow-angle-side convex part.
And a mirror with a heater. Fourth summary
A reflective film on a mirror substrate having a narrow-angle portion and a wide-angle portion.
Heating resistor film, or reflection film and heating resistor film are formed
And a plurality of electrodes for energizing and heating the heating resistor film.
In a mirror with heater provided with electrodes consisting of wires,
The electrode is opposed to at least the wide-angle side of one electrode wire.
Forming a convex portion toward the electrode line to be
A projection is formed on the narrow angle side of another electrode line facing the projection.
The opposite parts of both convex parts are curved and
The radii of the arcs are the same, and
Is the length from the end face of the convex part on the narrow angle part side to the vertex.
Mirrors with heaters,
I do. A fifth aspect is a mirror having a narrow-angle portion and a wide-angle portion.
Reflective film and heating resistor film on substrate, or reflective film and heat generation
A resistor film is formed, and the heating resistor film is energized and heated.
With heater provided with electrodes consisting of multiple electrode wires
In one embodiment, the electrode is at least wide of one electrode line.
Forming a protrusion toward the opposing electrode line on the corner side
At the narrow-angle side of the other electrode wire facing the wide-angle side projection.
A convex portion is formed, and the wide-angle portion side convex portion and the narrow-angle portion side convex portion are formed.
The portions facing each other are curved and straight, respectively.
The length from the end face to the vertex of the wide-angle part convex part is the narrow-angle part convex part.
Heater having a width larger than the width of the part
Mirror attached.

FIG. 1 is a rear view of a mirror with a heater used for a vehicle door mirror according to an embodiment of the present invention.
FIG. Reference numeral 1 denotes a substantially parallelogram mirror substrate made of a transparent material such as glass.
The four rounded corners of the mirror substrate 1 are portions where the inner angle formed by the outer edge of the mirror substrate 1 is larger than 90 degrees (wide-angle portion).
1a and 1d and small portions (narrow-angle portions) 1b and 1c. On the back surface of the mirror substrate 1, a reflection film / heating resistor film 2 is formed. The reflection film / heat generating resistor film 2 is formed by sputtering or vacuum deposition of a film of titanium, chromium, nichrome, or the like. In addition,
As the reflection film / heating resistor film 2, a configuration other than the case where the film formed on the back surface of the mirror substrate 1 serves as both the reflection film and the heating resistor film as in the present embodiment can be adopted. For example, a multi-layered film is formed, and each film has a function as a reflection film and a function as a heating resistor film, or an insulating layer is formed between the reflection film and the heating resistor film. However, a member formed so as not to be electrically connected can also be employed. In the case where a multilayer film is formed and the function as a reflection film and the function as a heating resistor film are overlapped on each film, the first layer is
Aluminum, chromium, nickel, nichrome-based alloy, nickel-phosphorus, etc. as the material, sputtering method,
The second layer is formed by a vacuum evaporation method or a plating method, and the like.
Using titanium, titanium silicide, chromium silicide, tantalum nitride, titanium carbide, tungsten carbide, niobium boride, an iron-chromium-aluminum-based alloy, or the like, it can be formed by a sputtering method, a vacuum evaporation method, a plating method, or the like. . In the case where an insulating layer is formed between the reflective film and the heating resistor film so as not to be electrically connected, the reflective film may be made of aluminum, chromium, nickel, a nichrome alloy, nickel-phosphorus. And the like, using a sputtering method, a vacuum deposition method, a plating method, or the like, using silica as an insulating layer, and using titanium, titanium silicide, chromium silicide, tantalum nitride, titanium carbide, titanium carbide, and tungsten carbide as a heating resistor film. , Niobium boride, an iron-chromium-aluminum alloy, or the like, and can be formed by a sputtering method, a vacuum evaporation method, a plating method, or the like.

Further, an electrode 3 composed of electrode wires 3a and 3b for supplying a current to the reflective film and heat generating resistor film 2 is provided on the back surface of the reflective film and heat generating resistor film 2. The lines 3 a and 3 b are formed so as to extend in both directions of the narrow-angle portion and the wide-angle portion of the mirror substrate 1. The opposed electrode wires 3a and 3b are arranged at the end portions of the electrode wires so that the interval between the electrode wires is narrower near the end portion than at the center portion so that heating at the end portion of the mirror substrate 1 is also improved. That is, the convex portions are provided at the positions of the narrow angle portion and the wide angle portion. here,
The wide-angle portion-side convex portion is formed so as to suppress current concentration in the wide-angle portion. The shape of the electrode wire for suppressing the current concentration at the wide-angle portion side convex portion is as follows:
It is necessary to satisfy at least one of the following. No convex portion is formed on the narrow-angle portion side opposite to the wide-angle portion-side convex portion. A convex portion is formed on the narrow-angle portion side opposite to the wide-angle portion side convex portion, and the portions of the both convex portions facing each other are linear , and the width of the convex portion formed at the wide-angle portion side electrode tip portion is The width is larger than the width of the convex portion formed at the tip of the narrow-angle portion-side electrode. And a convex portion is formed on the narrow angle portion side opposite to the wide-angle side convex part, one another of the two protrusions
The opposing portion is a curved, the radius of the arc of the convex portion formed on the wide angle portion side electrode tip, the arc of the larger radius of the convex portion formed on the narrow angle portion side electrode tip. And a convex portion is formed on the narrow angle portion side opposite to the wide-angle side convex part, each other of the two protrusions
The opposite part is curved and the radius of the arc of the convex part is equal
In addition, the length from the end face to the vertex of the convex portion formed at the tip of the wide-angle electrode is longer than the length from the end face to the vertex of the convex portion formed at the tip of the narrow-angle electrode. Facing the wide angle side convex
A convex portion is formed on the narrow angle side of the other
The opposing parts of the corner-side convex part and the narrow-corner-side convex part are
The shape is curved and straight, respectively, and the length from the end face to the vertex of the convex portion formed at the wide-angle portion-side electrode tip is larger than the width of the convex portion formed at the narrow-angle portion-side electrode tip. By making the shape of the end portion of the electrode wire as described above, the degree of current concentration flowing into the wide-angle portion, which is easily heated, is reduced, so that the entire mirror surface can be uniformly heated.

The electrode wires 3a and 3b can be formed by various methods. For example, using copper or silver paste to form a thin layer of copper or silver, soldering on it,
For example, a thin layer of nickel is formed by nickel plating. Also, in order to make uniform heating of the entire mirror,
By changing the material and thickness of the electrode wire, the electrode may have an uneven resistance value depending on the location.

Further, the back surface of the mirror is electrically insulated,
It is coated with an insulating material 4 such as resin or rubber having a low Young's modulus that does not cause cracks due to temperature changes. Reference numeral 5 is a lead wire for connecting the electrode wires 3a and 3b to a power supply circuit (not shown) by soldering or the like, and A1 and A2 are power supply points of the respective electrode wires. The number of power supply points in the electrode wire may be plural.

[0011]

In the mirror with heater according to the present invention, the entire surface including the wide-angle portion of the mirror substrate can be uniformly heated under the desired temperature control because the current flowing into the wide-angle portion, which has conventionally been easily overheated, By adjusting the shape of the electrode wires on the wide-angle side and the narrow-angle side, the current density on the wide-angle side is reduced to prevent overheating of the wide-angle section and efficiently cover the entire mirror substrate. This is because it became possible to warm.

[0012]

The present invention will be described below in more detail with reference to examples. Embodiment 1 FIG. 1 shows a vehicle door mirror according to Embodiment 1, which is a substantially parallelogram glass curved mirror substrate (R = 1400 mm).
1, a titanium film is formed by sputtering to a thickness of 0.1 μm.
A thick film was formed as the reflection film / heating resistor film 2. Further, an electrode 3 composed of electrode lines 3a and 3b for supplying electricity to the reflective film and heating resistor film 2 is provided on the back surface of the reflecting film and heating resistor film 2. 3b is
The mirror substrate 1 is formed so as to extend in both directions of the narrow-angle portion and the wide-angle portion. The lead wire 5 was connected to the feeding points A1 and A2 set to the electrode wires 3a and 3b of the electrode 3, thereby producing a mirror with a heater. The opposed electrode lines 3a, 3b
In order to enable heating at the end of the mirror substrate 1,
Protrusions are provided at the ends of the electrode wires such that the spacing between the electrode wires near the end is smaller than the spacing between the electrode wires at the center. In the electrode wire 3a, E2 indicates a convex portion at the end of the electrode wire on the narrow angle portion 1b side of the mirror substrate 1,
Reference numeral 1 denotes a convex portion at the end of the electrode wire on the wide-angle portion 1a side of the mirror substrate 1. In the electrode wire 3b, E4 indicates a convex portion at the end of the electrode line on the narrow-angle portion 1c side of the mirror substrate 1, and E3 indicates a convex portion on the end of the electrode line on the wide-angle portion 1d side of the mirror substrate 1. In the present embodiment, the protruding portions of these electrode wire end portions are formed such that the tips are substantially linear, and the width of the wide-angle portion-side convex portions E1 and E3 is equal to the width of the narrow-angle portion-side convex portions E2 and E4. It needs to be formed larger. This is because the entire surface of the mirror is uniformly heated by reducing the density of the current flowing into the wide-angle portion that is easily heated. The ratio of the width of the wide-angle portion to the width of the narrow-angle portion depends on the size of the mirror, the material and dimensions of the electrode wires, etc., but it is preferable to increase as the angle of the wide-angle portion increases. When the heating of the mirror with heater was controlled by a temperature control element (thermostat) 6, the temperature of the surface of the mirror substrate was reduced by 50 to 6
Control could be performed within the range of 5 ° C. as set.

Second Embodiment FIG. 3 shows a vehicle door mirror according to a second embodiment. In the first embodiment, the convex portion has a curved shape, and the wide-angle portion-side convex portion E in the first embodiment.
Mirrors with heaters were manufactured in the same manner as in Example 1, except that the radii of curvature of E1 and E3 were larger than the radii of curvature of the narrow-angle-side convex portions E2 and E4. The ratio of the radius of curvature of the wide-angle-portion-side convex portion to the radius of the narrow-angle-portion-side convex portion varies depending on the size of the mirror, the material and dimensions of the electrode wire, and the like, but it is preferable to increase as the angle of the wide-angle portion increases. . The heating of the mirror with heater is controlled by a temperature control element (thermostat) 6
The temperature of the mirror substrate surface by 50
Control could be performed within the range of ~ 65 ° C as set.

Comparative Example 1 FIG. 4 shows a vehicle door mirror according to Comparative Example 1, in which the widths of the wide-angle portion-side convex portions E1 and E3 and the narrow-angle portion-side convex portions E2 and E4 are different from those of the first embodiment. Except that they were formed in the same size,
A mirror with a heater was manufactured in the same manner as in Example 1. When the heating of the mirror with heater was controlled by a temperature control element (thermostat) 6, overheating occurred near the end of the wide-angle-part-side electrode wire, and the temperature of the surface of the mirror substrate became 40 to 40 ° C.
The temperature was 95 ° C., and the temperature could not be controlled within the set temperature range.

Embodiment 3 FIG. 5 shows a vehicle fender mirror according to Embodiment 3.
Substantially trapezoidal glass curved mirror substrate (R = 1000m
m) A titanium film is formed on 1 by sputtering at 0.1
A reflective film / heat generating resistor film 2 was formed to a thickness of μm. Further, on the back surface of the reflection film / heating resistor film 2, there are provided electrode wires 3a, 3b for supplying electricity to the reflection film / heating resistor film 2.
An electrode 3 is provided, and both end portions of the electrode line 3a extend to a narrow angle portion of the mirror substrate 1 and are connected to the electrode line 3b.
Is formed so as to extend to the wide-angle portion of the mirror substrate 1. Feeding point A set to electrode lines 3a and 3b of this electrode 3
1, a lead wire 5 was connected to A2 to prepare a mirror with a heater. The electrode wires 3b are arranged such that the interval between the electrode wires near the edge is smaller than the interval between the electrode wires at the center so that heating at the edge of the mirror substrate 1 is also possible. A curved convex portion is provided at the end. In the electrode wire 3b, E1 indicates a projection at the end of the electrode wire on the wide-angle portion 1a side of the mirror substrate 1, and E3 indicates a projection at the end of the electrode wire on the wide-angle portion 1d side of the mirror substrate 1. In addition, electrode wire 3
In a, e2 and e4 are the wide-angle-portion-side convex portions E1 and E3.
2 shows a portion of the narrow-angle electrode line opposed to FIG. In the present embodiment, these electrode wire ends have a convex portion at the wide-angle end, and no convex at the narrow-angle end, so that the density of the current flowing into the wide-angle portion is reduced. As a result, the entire mirror surface can be uniformly heated. When the heating of the mirror with heater was controlled by the temperature control element (thermostat) 6, the temperature of the surface of the mirror substrate could be controlled as set within a range of 55 to 65 ° C.

Embodiment 4 FIG. 6 shows a vehicle fender mirror according to Embodiment 4.
In the third embodiment, curved convex portions are formed at both ends of the electrode wire 3a extending to the narrow-angle portions 1b and 1c, and the curvature radii of the wide-angle portion-side convex portions E1 and E3 are changed to the narrow-angle portion-side convex portions. A mirror with a heater was manufactured in the same manner as in Example 3, except that the mirror was formed larger than E2 and E4. When the heating of the mirror with the heater was controlled by the temperature control element (thermostat) 6, the temperature of the surface of the mirror substrate could be controlled as set within the range of 50 to 65 ° C.

Embodiment 5 FIG. 7 shows a vehicle fender mirror of Embodiment 5.
In the third embodiment, at both ends of the electrode wire 3a extending to the narrow-angle portions 1b and 1c, convex portions E2 and E4 having substantially linear tips are formed, and the electrode wires 3b extending to the wide-angle portions 1a and 1d are formed. At the both ends of which are formed substantially convex protrusions E1 and E3, and
A mirror with a heater was manufactured in the same manner as in Example 3 except that the width of the wide-angle-side convex portion was larger than the width of the narrow-angle-side convex portion. When the heating of the mirror with the heater was controlled by the temperature control element (thermostat) 6, the temperature of the surface of the mirror substrate could be controlled as set within the range of 50 to 65 ° C.

Comparative Example 2 FIG. 8 shows a vehicle fender mirror of Comparative Example 2,
A mirror with a heater was manufactured in the same manner as in Example 3, except that the electrode wire 3b extending to the wide-angle portions 1a and 1d was changed to an electrode wire having no projection at both ends. When the heating of the mirror with a heater was controlled by a temperature control element (thermostat) 6, overheating occurred near the end of the wide-angle side electrode wire, and the temperature of the surface of the mirror substrate became 40 to 9
It was 5 ° C., and could not be controlled in the temperature range as set.

Embodiment 6 FIG. 9 shows a mirror for a large vehicle according to Embodiment 6, in which a nichrome film and a titanium film are sequentially formed on a substantially trapezoidal glass curved mirror substrate (R = 600 mm) 1 by a sputtering method. Thus, the reflective film and the heat generating resistor film 2 were formed to have a thickness of 0.05 μm and 0.1 μm, respectively. Further, on the back surface of the reflection film / heating resistor film 2, an electrode 3 composed of electrode wires 3a and 3b for supplying electricity to the reflection film / heating resistor film 2 is provided. Both end portions extend to a wide-angle portion of the mirror substrate 1, and the electrode lines 3 b are formed to extend to a narrow-angle portion of the mirror substrate 1. The electrode wire 3 of this electrode 3
The lead wire 5 was connected to the feeding points A1 and A2 set at a and 3b to produce a mirror with a heater. The opposing electrode lines 3a, 3b form projections at both ends and a center,
The electrode wire 3b is further provided with a convex portion connected to the convex portions at both ends. In the electrode wire 3a, E1 indicates a convex portion at the end of the electrode wire on the wide-angle portion 1a side of the mirror substrate 1, and E3 indicates a convex portion on the end of the electrode wire on the wide-angle portion 1d side of the mirror substrate 1. In the electrode wire 3a, E2 indicates a convex portion at the end of the electrode line on the narrow-angle portion 1b side of the mirror substrate 1, and E4 indicates a convex portion on the end portion of the electrode line on the narrow-angle portion 1c side of the mirror substrate 1. In the present embodiment, these convex portions are curved, but the distance from the end of the electrode wire to the vertex of the convex portion is such that the wide-angle portion-side convex portions E1 and E3 are narrower-angle convex portions E2 and E4. Since the length is longer, the density of the current flowing into the wide-angle portion decreases, and the entire mirror surface can be uniformly heated. When the heating of the mirror with the heater was controlled by the temperature control element (thermostat) 6, the temperature of the surface of the mirror substrate could be controlled as set within the range of 50 to 65 ° C. In this embodiment, since the mirror size is large, the convex portion is formed not only at both ends of the electrode wire but also at the central portion so that the mirror is uniformly heated.

FIG. 10 shows a mirror for a large vehicle according to a seventh embodiment. In the sixth embodiment, an electrode wire 3b extending to the narrow corners 1b and 1c is used.
A mirror with a heater was produced in the same manner as in Example 6, except that no convex portions were formed at both ends of the mirror. When the heating of the mirror with the heater is controlled by the temperature control element (thermostat) 6, the temperature of the mirror substrate surface is controlled as set within the range of 45 to 65 ° C. even though the temperature at the left and right ends is slightly lowered. Was completed.

Comparative Example 3 FIG. 11 shows a mirror for a large vehicle according to Comparative Example 3, which has a radius of curvature of the wide-angle portion side projections E1 and E3 in Example 6.
A mirror with a heater was manufactured in the same manner as in Example 6, except that the curvature radii of the narrow-angle-side convex portions E2 and E4 were equalized.
When the heating of the mirror with heater was controlled by a temperature control element (thermostat) 6, overheating occurred near the end of the wide-angle-part side electrode wire, and the temperature of the surface of the mirror substrate became 40 ° C.
９５95 ° C., and could not be controlled in the temperature range as set.

Eighth Embodiment FIG. 12 shows a mirror for a large vehicle according to an eighth embodiment, in which a Nichrome film and a titanium film are sequentially formed on a substantially trapezoidal glass curved mirror substrate (R = 600 mm) 1 by a sputtering method. Thus, the reflective film and the heat generating resistor film 2 were formed to have a thickness of 0.05 μm and 0.1 μm, respectively. Further, on the back surface of the reflection film / heating resistor film 2, an electrode 3 composed of electrode wires 3a and 3b for supplying electricity to the reflection film / heating resistor film 2 is provided. Both end portions extend to a wide-angle portion of the mirror substrate 1, and the electrode wire 3 b is formed such that its end is located slightly inside the narrow-angle portion of the mirror substrate 1 so as to be substantially equal in length to the electrode wire 3 a. are doing. Lead wires 5 are connected to feeding points A1 and A2 set to the electrode wires 3a and 3b of the electrode 3.
Was connected to produce a mirror with a heater. The electrode wire 3
In a, a convex portion is formed at both ends and a central portion, and a convex portion is formed continuously with the convex portions at both ends. On the other hand, electrode wire 3
In b, a projection corresponding to the projection at the center and the projection at both ends of the electrode wire 3a is formed. In the electrode line 3a, E1 indicates a convex portion at the end of the electrode wire on the wide-angle portion 1a side of the mirror substrate 1, and E3 indicates the wide-angle portion 1 of the mirror substrate 1.
The protrusion at the end of the d-side electrode wire is shown. In the electrode wire 3b, e2 and e4 indicate electrode wire portions facing the wide-angle-portion-side convex portions E1 and E3. In the present embodiment, these electrode wire ends have a convex portion at the wide-angle end, and no convex at the narrow-angle end, so that the density of the current flowing into the wide-angle portion is reduced. As a result, the entire mirror surface can be uniformly heated. When the heating of the mirror with heater is controlled by the temperature control element (thermostat) 6, the temperature of the mirror substrate surface is controlled as set within the range of 50 to 65 ° C. even though the temperature at the left and right ends is slightly lowered. Was completed.

Ninth Embodiment FIG. 13 shows a mirror for a large vehicle according to a ninth embodiment. In the eighth embodiment, the electrode wire 3b extends to the narrow corners 1b and 1c.
A mirror with a heater was manufactured in the same manner as in Example 8, except that the mirror was formed as described above. When the heating of the mirror with the heater was controlled by the temperature control element (thermostat) 6, the temperature of the surface of the mirror substrate could be controlled as set within the range of 50 to 65 ° C.

Embodiment 10 FIG. 14 shows a mirror for a large vehicle according to Embodiment 10, which is different from Embodiment 8 in that a central portion and a convex portion are formed on the electrode wire 3a, and a central portion and a convex portion are formed on the electrode wire 3b. Convex portions are formed at both ends and further at a plurality of places, and the wide-angle portion side curved convex portions E1, E
A mirror with a heater was manufactured in the same manner as in Example 8, except that the distance from the end to the apex of No. 3 was larger than the width of the linear projections E2 and E4 at the narrow-angle end. The heating of the mirror with heater is controlled by a temperature control element (thermostat) 6
The temperature of the mirror substrate surface by 50
Control could be performed within the range of ~ 65 ° C as set.

[0025]

The mirror with heater according to the present invention can prevent overheating due to current concentration in the wide-angle portion of the mirror substrate, so that uniform heating can be obtained over the entire mirror substrate, so that desired temperature control is possible. In addition, water droplets, ice, and the like adhering to the mirror surface can be quickly removed over the entire surface. Also, by applying a large current, it is possible to quickly remove raindrops adhered to the mirror during traveling during rainfall.

[Brief description of the drawings]

FIG. 1 is a rear view of a first embodiment of the present invention.

FIG. 2 is a schematic longitudinal sectional view of FIG.

FIG. 3 is a rear view of the second embodiment of the present invention.

FIG. 4 is a rear view of Comparative Example 1 of the present invention.

FIG. 5 is a rear view of the third embodiment of the present invention.

FIG. 6 is a rear view of the fourth embodiment of the present invention.

FIG. 7 is a rear view of the fifth embodiment of the present invention.

FIG. 8 is a rear view of Comparative Example 2 of the present invention.

FIG. 9 is a rear view of the sixth embodiment of the present invention.

FIG. 10 is a rear view of the seventh embodiment of the present invention.

FIG. 11 is a rear view of Comparative Example 3 of the present invention.

FIG. 12 is a rear view of the eighth embodiment of the present invention.

FIG. 13 is a rear view of the ninth embodiment of the present invention.

FIG. 14 is a rear view of the tenth embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Mirror substrate 2 Reflection film and heating resistor film 3 Electrode 3a, 3b Electrode wire 4 Insulating material 5 Lead wire 6 Temperature control element 1a, 1d Wide angle portion 1b, 1c Narrow angle portion A1, A2 Feeding point E1, E3 Wide angle side Narrow- angle electrode wire portions facing the convex portions E2, E4 at the electrode wire end portions and the convex portions e2, e4 E1, E3 at the narrow- angle portion-side electrode wire end portions.
Minute

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B60S 1/04-1/60 B60R 1/06

Claims (5)

(57) [Claims] 1. A method for forming a reflecting film and a heating resistor film, or a reflecting film and a heating resistor film on a mirror substrate having a narrow-angle portion and a wide-angle portion, and heating and heating the heating resistor film. Duplication
In a mirror with a heater provided with an electrode composed of a number of electrode wires , the electrode is at least on a wide-angle portion side of one electrode wire.
At the same time, forming a convex portion toward the opposing electrode line,
A projection is formed on the narrow-angle side of the other electrode wire facing the wide-angle side projection.
Miller with heater characterized by not being formed
- (2) On a mirror substrate having a narrow-angle part and a wide-angle part
A reflection film and a heating resistor film, or a reflection film and a heating resistor
A film for forming a film and heating and heating the heating resistor film.
Mirror with heater provided with electrodes consisting of a number of electrode wires.
And the electrode is at least on the wide angle side of one electrode wire.
At the same time, forming a convex portion toward the opposing electrode line,
A convex portion is formed on the narrow-angle portion side of the other electrode wire facing the wide-angle portion-side convex portion.
Are formed, and the opposing portions of the two convex portions are linear.
The width of the wide-angle portion-side protrusion is smaller than the width of the narrow-angle portion-side protrusion.
A mirror with heater characterized by being wider. (3) On a mirror substrate having a narrow-angle part and a wide-angle part
A reflection film and a heating resistor film, or a reflection film and a heating resistor
A film for forming a film and heating and heating the heating resistor film.
Mirror with heater provided with electrodes consisting of a number of electrode wires.
And the electrode is at least on the wide angle side of one electrode wire.
At the same time, forming a convex portion toward the opposing electrode line,
A convex portion is formed on the narrow-angle portion side of the other electrode wire facing the wide-angle portion-side convex portion.
Are formed, and the opposite parts of both projections are curved
Wherein the radius of the arc of the wide-angle portion side convex portion is the narrow-angle portion side convex portion.
Characterized by being larger than the radius of the arc of the part
Heated mirror. (4) On a mirror substrate having a narrow-angle part and a wide-angle part
A reflection film and a heating resistor film, or a reflection film and a heating resistor
A film for forming a film and heating and heating the heating resistor film.
Mirror with heater provided with electrodes consisting of a number of electrode wires.
And the electrode is at least on the wide angle side of one electrode wire.
At the same time, forming a convex portion toward the opposing electrode line,
A convex portion is formed on the narrow-angle portion side of the other electrode wire facing the wide-angle portion-side convex portion.
Formed And the opposite parts of both projections are curved
The radius of those arcs is equal, and the end face of the wide-angle part side convex part
From the end face of the convex part on the narrow angle side to the vertex
With a heater characterized by being longer than the length of
mirror. (5) On a mirror substrate having a narrow-angle part and a wide-angle part
A reflection film and a heating resistor film, or a reflection film and a heating resistor
A film for forming a film and heating and heating the heating resistor film.
Mirror with heater provided with electrodes consisting of a number of electrode wires.
And the electrode is at least on the wide angle side of one electrode wire.
At the same time, forming a convex portion toward the opposing electrode line,
A convex portion is formed on the narrow-angle portion side of the other electrode wire facing the wide-angle portion-side convex portion.
The wide-angle part side convex part and the narrow-angle part side convex part are formed
The opposing parts are curved and straight, respectively, and the wide-angle part
The length from the end face to the vertex of the side convex part is the width of the narrow-angle part side convex part.
Mira with heater characterized by being larger
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