JP2003300414A - On-vehicle device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an on-vehicle device capable of enhancing reliability of an action of an instrument by protecting the instrument from the heat ray and inhibiting raising of a temperature, even under a severe condition where, for example, an on-vehicle instrument such as a camera continuously receives irradiation of the heat ray (infrared) caused by the rays of the sun. <P>SOLUTION: In the on-vehicle device, the on-vehicle instrument 1 such as the camera is arranged at an inner side of a wind shield 4 of a vehicle. A heat ray reflection material 1a is provided on a surface part of a box body of the on-vehicle instrument 1 opposed to the wind shield 4. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an in-vehicle device in which an in-vehicle device such as a camera, a raindrop sensor, and a radar is arranged inside a front window glass of an automobile, and more particularly to an in-vehicle device in which the in-vehicle device is protected from heat rays (sun rays). Regarding the device.

[0002]

2. Description of the Related Art FIG. 5 is a side sectional view schematically showing a mounting example of a conventional vehicle-mounted device, and is an explanatory view of a camera mounted inside a front window glass of an automobile and photographing the front of the vehicle. In the figure, 1 is a camera body as an in-vehicle device, 2
Is a camera mounting member for fixing the camera body 1 to the ceiling portion 3 of the vehicle, and 4 is a windshield,
In this case, it is the front window glass of an automobile. Reference numeral 5 is a black ceramic applied on the inner surface of the windshield 4, and 6 is a sun ray (infrared ray) as a heat ray.

In the conventional vehicle-mounted device constructed as described above, the sun rays 6 pass through the windshield 4, but are blocked by the black ceramics 5 and do not reach the camera body 1. However, the black ceramic 5 absorbs heat rays (infrared rays) contained in the radiated sunlight rays 6, so that the temperature gradually rises and the heat rays are radiated to the surroundings.

[0004]

In the conventional device as described above, since sufficient heat countermeasures have not been taken,
The camera body 1 is heated by the heat rays (infrared rays) emitted from the black ceramics 5 that have been heated by the sun rays 6 and have become high
If the adverse temperature conditions rise due to factors such as the season, weather, ambient temperature, ventilation conditions, sunlight irradiation conditions, irradiation time, etc., the function may be impaired. there were.

The present invention has been made in order to solve the above-mentioned problems of the prior art, and protects the in-vehicle device such as a camera even when it is exposed to the heat rays of the sunlight under bad conditions, and the in-vehicle device is protected. It is an object of the present invention to provide an in-vehicle device that can improve the reliability of the operation of the.

[0006]

An in-vehicle device according to the present invention is an in-vehicle device in which an in-vehicle device is arranged inside a windshield of a vehicle. The heat ray reflector is provided.

Further, the on-vehicle device according to the present invention is a vehicle-mounted device in which the on-vehicle device is disposed inside a windshield of a vehicle, and a heat ray reflecting material is provided on a surface portion of the windshield facing the on-vehicle device. It is provided.

Further, the heat ray reflecting material is an infrared ray reflecting film.

Further, the in-vehicle device according to the present invention is an in-vehicle device in which the in-vehicle device is arranged inside a windshield of a vehicle, and the in-vehicle device is provided in a space between the windshield and the in-vehicle device. A heat ray reflector is provided so as to cover the vehicle and be fixed to the vehicle.

Further, the heat ray reflective material is at least one metal material selected from the group consisting of copper, aluminum having a glossy surface, and alloys using these metals.

Further, the surface on the side opposite to the windshield of the vehicle-mounted device is formed of a member having a high infrared emissivity.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiment 1. 1 is a side sectional view schematically showing an in-vehicle device according to Embodiment 1 of the present invention. In the figure, 1 is a camera body for forward monitoring as an in-vehicle device, and 1a is a heat ray reflective material attached to the surface of the casing of the camera body facing the windshield 4 of the camera body 1, and has a metallic glossy surface. Of a sheet of copper or aluminum. Reference numeral 2 is a camera mounting member for fixing the camera body 1 to the ceiling portion 3 of the vehicle. Reference numeral 5 is a black ceramic provided inside the upper portion of the windshield 4, and is composed of a coating film applied on the windshield 4. There is. Reference numeral 6 denotes sun rays (infrared rays) as heat rays.

Next, the first embodiment configured as described above
The operation of will be described. In fine weather, the sun rays 6 are applied to the entire surface of the windshield 4 of the vehicle, but are shielded from the camera body 1 by the black ceramic 5 and do not reach the camera body 1 directly. On the other hand, the black ceramic 5 absorbs heat rays (infrared rays) by being irradiated with the sun rays 6, the temperature gradually rises, and infrared rays are radiated to the surroundings.

However, since the heat ray reflecting material 1a made of a copper or aluminum sheet having a metallic luster surface is provided on the surface of the housing facing the windshield 4 of the camera body 1, the black ceramic 5 having a high temperature. Most of the infrared rays emitted from the infrared ray are reflected by the heat ray reflective material 1a on the surface of the housing of the camera body 1, and the temperature rise of the camera body 1 is suppressed.

In general, an object that absorbs infrared rays well is an object that hardly absorbs infrared rays, that is, an object having a low emissivity, according to Kirchhoff's law of radiating infrared rays well.
It is difficult to absorb infrared rays radiated from the high temperature black ceramic 5 and is suitable as a housing of an in-vehicle device that requires measures against heat rays. As a specific example, the emissivity of a metallic material is aluminum = 0.05, copper = 0.05 on a glossy surface,
Iron = 0.21, and a luster material such as aluminum or copper is suitable as an in-vehicle device casing or its surface material. Even in the result of the actual comparison test of the first embodiment shown in FIG. 1, it is found that the in-vehicle device to which the present invention is applied has a trouble in the operation of the device even under the bad condition of being exposed to the sunlight for a long time. There wasn't.

As described above, according to the first embodiment of the present invention, the heat ray reflector 1a made of a glossy surface of aluminum or copper is provided on the surface portion of the camera body 1 facing the windshield 4. , The infrared ray radiated from the high temperature black ceramic 5 is reflected by the heat ray reflection material 1a.
The temperature rise of the camera body 1 can be suppressed, and the reliability of the operation of the camera body 1 can be maintained even under adverse conditions of severe sunlight.

In the first embodiment, aluminum or copper is used as the heat ray reflective material 1a, but the heat ray reflective material 1a is not limited to these, and for example, an alloy material containing copper or aluminum metal may be used. . Further, the shape of the heat ray reflective material 1a is not particularly limited to a sheet, and examples thereof include a film, a plate material, or a material obtained by subjecting a metal to gloss plating, and an aluminum-containing coating film containing a powder of the metal. It may be a coating film having an infrared reflecting function, and the same effect can be expected.
Further, the casing surface material of the camera body 1 itself may be made of a heat ray reflective material made of a plate material of aluminum or copper having a metallic glossy surface.

As the heat ray reflecting material 1a, a sheet or film of aluminum or copper having a glossy surface is attached to the surface of the housing of the camera body 1 or the above-mentioned paint having an infrared reflecting function is applied. In this case, since the camera body 1 can be used as it is, it is possible to obtain the secondary effect of easy manufacture.

Further, although the heat ray reflecting material 1a is provided on the surface of the housing of the vehicle-mounted device such as the camera body 1, the surface of the black ceramic 5 facing the camera body 1 is coated with infrared reflecting paint, or an aluminum film or the like. The same effect can be expected even if the infrared reflection film of 1 is attached. further,
When the heat ray reflector 1a is provided on the surface of the housing of the camera body 1 and the surface of the black ceramic 5 facing the camera body 1 is coated with infrared reflection paint or an infrared reflection film such as an aluminum film is attached. Has a greater protection effect from heat rays.

Furthermore, the case where the black ceramic 5 is applied to the inner surface of the windshield 4 has been described. However, even if the black ceramic 5 is not provided, the heat ray reflecting material 1a provided on the surface of the housing of the vehicle-mounted device can be used. Since the sun rays 6 are reflected and go out, the same effect can be obtained.

Embodiment 2. 2 is a side sectional view schematically showing a main part of an in-vehicle device according to a second embodiment of the present invention. In the figure, reference numeral 1b denotes a lower surface portion that does not face the windshield 4 above the camera body 1, and is formed as a member having a high infrared emissivity by finishing a metal plate into a matte surface. In the second embodiment, no black ceramic coating film is provided. Other configurations are similar to those of the above-described first embodiment, and thus description thereof will be omitted.

In the second embodiment of the present invention configured as described above, most of the sun rays are reflected by the heat ray reflector 1a, and the temperature rise of the camera body 1 is suppressed. Even if the temperature of the camera body 1 is slightly higher than the ambient air temperature, the lower surface portion 1b of the housing of the camera body 1 is formed of a matte surface having a high infrared emissivity. Infrared radiation from the surface portion 1b becomes strong, works in the direction of lowering the temperature of the camera body 1, and the temperature rise can be suppressed.

In the second embodiment described above, the lower surface portion 1b of the camera body 1 is made of a metal plate having a matte finish and having a high infrared emissivity. The subsequent coating film may be formed of a material having a high emissivity of infrared rays. Further, although the case where the heat ray reflective material 1a is also provided on the upper surface of the camera body 1 has been described, the heat ray reflective material 1a may be omitted depending on required conditions.

Embodiment 3. FIG. 3 is a side sectional view schematically showing an in-vehicle device according to Embodiment 3 of the present invention.
In the figure, reference numeral 7 denotes an aluminum film having a glossy surface, which is a heat ray reflecting material attached to the inner surface portion of the windshield 4 facing the camera body 1. A conventional device is used as it is as the camera body 1. The other structure is similar to that of the first embodiment, and the description thereof is omitted.

In the third embodiment of the present invention configured as described above, since the aluminum film 7 is attached to the inner surface portion of the windshield 4 facing the camera body 1, the large amount of the sun rays 6 is large. The portion reflects on the surface of the aluminum film 7 toward the outside as shown by an arrow 6a. Therefore, the temperature rise of the aluminum film 7 itself is suppressed, and the infrared ray that does not abnormally raise the temperature of the camera body 1 provided in the vicinity thereof is not emitted from the aluminum film 7. Therefore, the problem that the operation of the vehicle-mounted device such as a camera becomes unstable does not occur.

Fourth Embodiment 4 is a side sectional view schematically showing an in-vehicle device according to Embodiment 4 of the present invention.
In the figure, 1c is a camera body 1 and a windshield 4.
An aluminum plate as a heat ray reflecting member that is provided so as to extend between the aluminum plate 1c and the camera body 1 and is fixed to the vehicle via the camera mounting member 2 is a holding member. The upper surface of the aluminum plate 1c, which faces the windshield 4 in the figure, has a metallic luster. The other structure is similar to that of the first embodiment, and the description thereof is omitted.

According to the fourth embodiment configured as described above, the infrared rays radiated from the black ceramic 5 are reflected by the aluminum plate 1c as the heat ray reflecting material,
The temperature rise of the camera body 1 is suppressed. Therefore, the camera body 1 does not malfunction even under severe conditions. In place of the aluminum plate 1c, for example, a copper plate, a copper or aluminum alloy plate, or a plate plated with a gloss made of a metal material thereof may be used, and the same effect can be expected.

In the above description of the embodiment, the case where the windshield 4 is the front window glass of an automobile has been described, but the present invention is not limited to this and may be another vehicle such as an electric vehicle. . Further, it may be a rear window glass or a side window glass, and the attachment position may be, for example, a lower portion of the front window glass, but it does not interfere, and the same effect can be expected.

The windshield 4 is not limited to glass, and the same effect can be expected even if it is a plastic plate such as a transparent acrylic plate. Further, the infrared reflecting paint is not limited to the one containing aluminum powder, and may be, for example, a ceramic particle-containing paint having the same function. When this ceramic particle-containing paint is used, the heat ray reflecting function and the heat insulating function can be expected together, so that it is more effective in preventing the temperature rise of the vehicle-mounted device such as the camera body 1.

Further, the example in which the present invention is applied to the case where the vehicle-mounted device is a camera has been described, but the invention is not limited to the camera, and a device similarly requiring measures against heat rays, such as a liquid crystal display, automatic charge collection. It can also be preferably used for information communication devices such as systems, and electronic devices such as various measuring devices. Further, when the configurations of the respective examples are combined, it can be expected that the heat ray protection effect is further increased.

[0031]

As described above, according to the present invention, the following effects can be obtained.

According to the first invention described in claim 1,
It is possible to provide an in-vehicle device that protects an in-vehicle device such as a camera from a heat ray even when it is irradiated with a heat ray (infrared ray) such as a sun ray and has improved operation reliability.

According to the second invention described in claim 2,
It is possible to provide an in-vehicle device that protects an in-vehicle device such as a camera from a heat ray even when it is irradiated with a heat ray (infrared ray) such as a sun ray and has improved operation reliability.

According to the third invention described in claim 3,
By using the infrared ray reflecting film as the heat ray reflecting material, in addition to the effect of the first aspect of the invention, it is possible to easily manufacture an existing vehicle-mounted device.

According to the fourth invention described in claim 4,
It is possible to provide an in-vehicle device that protects an in-vehicle device such as a camera from a heat ray even when it is irradiated with a heat ray (infrared ray) such as a sun ray and has improved operation reliability.

According to the fifth invention described in claim 5,
Copper having a metallic glossy surface as a heat ray reflective material, aluminum, and by using a metal material selected from the group consisting of these metal alloys, the heat rays such as sunlight rays are efficiently reflected to suppress the temperature rise, Protect your equipment more reliably,
The reliability of operation can be improved.

According to the sixth invention described in claim 6,
By forming the surface of the vehicle-mounted device on the side opposite to the windshield with a member having a high infrared emissivity, the temperature rise is further suppressed by the heat radiation effect from the vehicle-mounted device housing itself in addition to the effect of the first invention. .

[Brief description of drawings]

FIG. 1 is a side sectional view schematically showing an in-vehicle device according to a first embodiment.

FIG. 2 is a side sectional view schematically showing an in-vehicle device according to a second embodiment.

FIG. 3 is a side sectional view schematically showing an in-vehicle device according to a third embodiment.

FIG. 4 is a side sectional view schematically showing an in-vehicle device according to a fourth embodiment.

FIG. 5 is a side sectional view schematically showing an example of mounting a conventional vehicle-mounted device.

[Explanation of symbols]

1 In-vehicle equipment (camera body), 1a Heat ray reflective material,
1b lower surface part (matte surface), 1c heat ray reflection material (aluminum plate), 4 windshield (front window glass), 5 black ceramic, 6 heat rays (sun rays, infrared rays), 7 heat ray reflection material (aluminum film).

Claims (6)

[Claims] 1. An in-vehicle device in which an in-vehicle device is disposed inside a windshield of a vehicle, wherein a heat ray reflecting material is provided on a surface portion of a casing of the in-vehicle device facing the windshield. In-vehicle device. 2. An in-vehicle device in which an in-vehicle device is disposed inside a windshield of a vehicle, wherein a heat ray reflective material is provided on a surface portion of the windshield facing the in-vehicle device. In-vehicle device. 3. The vehicle-mounted device according to claim 1, wherein the heat ray reflective material is an infrared reflective film. 4. An in-vehicle device in which an in-vehicle device is arranged inside a windshield of a vehicle, wherein the in-vehicle device is interposed in a space between the windshield and the in-vehicle device so as to cover the in-vehicle device. An in-vehicle device, which is provided with a heat ray reflector fixed to the device. 5. The heat ray reflective material is at least one metal material selected from the group consisting of copper, aluminum, and an alloy using these metals, the surface of which has a glossy surface. The vehicle-mounted device according to claim 1, claim 2, or claim 4. 6. The in-vehicle device according to claim 1, wherein the surface of the in-vehicle device on the side opposite to the windshield is formed of a member having a high infrared emissivity.