JP2014182996A - Vehicular lighting fixture device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicular lighting fixture device that is unlikely to cause condensation with a simple structure.SOLUTION: A vehicular lighting fixture device 10 comprises a transparent lens 11, a housing 12, a light-emitting diode 13 that is a light-emitting body, a pump 15, and a valve 17. A case 3 having high density is formed by a front lens 11 and the housing 12. The pump 15 for removing air from the case 3 to reduce pressure is provided in an engine room 2, and the valve 17 for adjusting an amount of air is provided between the pump 15 and the case 3. When the pump 15 sucks air in the case 3, atmospheric pressure in the case 3 is reduced, and condensation is unlikely to occur.

Description

  The present invention relates to a vehicular lamp device such as an automobile headlamp.

  Conventionally, in a vehicular lamp device, there is a problem of dew condensation in a casing of the lamp. In the case of severe dew condensation, there is a possibility of affecting the illuminance, so a solution has been proposed. For example, in Patent Document 1, a technique for preventing condensation by providing an air inflow port for allowing external air to flow into the lamp chamber and ventilating the lamp chamber by making the lamp chamber negative by running wind. Is disclosed.

Japanese Utility Model Publication No. 5-73804

  In the technique of Patent Document 1, an air inflow port for letting outside air flow into the lamp chamber is provided, and the running wind is taken in to ventilate the lamp chamber. However, moisture easily enters with the wind. When traveling inside, there is a problem that condensation easily occurs.

  The present invention has been made in view of the above problems, and an example of the object thereof is to provide a vehicular lamp device that makes condensation more difficult with a simple configuration.

  In order to solve such a problem, a vehicular lamp device according to the present invention is formed with a high density, and communicates with a housing that radiates light from a light emitter provided inside, and the housing. A pump for sucking air in the housing and reducing the pressure is provided.

  Preferably, a valve is provided between the housing and the pump.

  Preferably, a tank individually communicating with both the housing and the pump is provided, and a valve is provided between at least one of the housing and the tank or between the tank and the pump.

  Preferably, the pump is a brake booster or a brake vacuum pump.

  Preferably, the tank is a negative pressure tank for braking.

  Preferably, a heater for heating the inside of the housing is provided.

  Preferably, the inside of the housing is decompressed by an electric pump.

  Preferably, the inside of the housing is decompressed by a mechanical pump.

  Preferably, the inside of the housing is gradually decompressed so as not to be saturated during decompression.

  Preferably, the light emitter is a light emitting diode.

  The vehicular lamp device of the present invention can be made more difficult to condense with a simple configuration.

1 is a partial cross-sectional view of a vehicle front portion including a vehicle lamp device according to a first embodiment of the present invention. It is a partial cross section figure of the vehicle front part containing the vehicle lamp device which concerns on 2nd Embodiment of this invention. It is a figure which shows the relationship between the atmospheric pressure in the tank of the vehicle lamp device which concerns on 2nd Embodiment of this invention, the atmospheric pressure in a housing | casing, and a brake timing.

  Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.

[First Embodiment]
FIG. 1 shows a first embodiment of the present invention. FIG. 1 is a partial cross-sectional view of a front portion of a vehicle including a vehicular lamp device according to a first embodiment of the present invention. The vehicle 1 has an engine room 2 at the front, and a vehicle lamp device 10 is provided on the front side of the engine room 2. The vehicular lamp device 10 includes a transparent front lens 11, a housing 12, a light emitting diode 13 that is a light emitter, a pump 15, and a bulb 17. The housing 3 includes a front lens 11 and a housing 12. A heater 14 is provided below the housing 12. A part of the housing 12 has a hole and is connected to the pump 15 through the first tube 16. A valve 17 for adjusting the amount of air is provided between the pump 15 and the housing 3. The valve 17 may be a one-way valve to control the atmospheric pressure in the housing.

  The housing 3 is formed with high density by the front lens 11 and the housing 12. The light emitting diode 13 is provided inside the housing 3 and radiates light to the outside. A pump 15 is provided in the engine room 2 for sucking air and depressurizing it from the housing 3 formed with high density. The pump 15 may be used in combination with, for example, a brake booster or a brake vacuum pump. Moreover, an electric pump or a mechanical pump may be used. If the pump 15 is, for example, an electric pump, the inside of the housing 3 can be gradually decompressed so that the air in the tank is gradually sucked and is not saturated during decompression.

  The housing 12 of the housing 3 includes a housing internal pressure sensor 21 that measures the pressure inside the housing 3. The in-casing pressure sensor 21 sends pressure information to the control unit 20. The control unit 20 controls the pump 15 and the valve 17 according to the atmospheric pressure information from the in-casing atmospheric pressure sensor 21.

  In the case where the pump 15 is a brake booster or a brake vacuum pump, the pump 15 operates according to the brake operation of the occupant, and the air in the housing 3 is sucked to lower the atmospheric pressure in the housing 3. As the atmospheric pressure in the housing 3 decreases, dew condensation is less likely to occur.

  When the pump 15 is an electric pump or a mechanical pump, the control unit 20 sends a control signal to the pump 15 according to the atmospheric pressure information from the in-casing atmospheric pressure sensor 21. In response to the control signal, the pump 15 operates, and the pump 15 sucks air in the housing 3 to lower the atmospheric pressure in the housing 3. As the atmospheric pressure in the housing 3 decreases, dew condensation is less likely to occur. Further, the temperature in the housing 3 can be controlled by the heater 14 provided at the lower portion of the housing 12.

  When the valve 17 is a normal valve, the air pressure in the housing 3 can be lowered by operating the valve 17 while suction is performed by the pump 15. On the other hand, when the valve 17 is a one-way valve, since suction can be performed according to the opening / closing operation of the valve 17, the atmospheric pressure in the housing 3 can be lowered according to the on / off of the pump 15.

[Second Embodiment]
2 and 3 show a second embodiment of the present invention. FIG. 2 is a partial cross-sectional view of the front portion of the vehicle including the vehicular lamp device according to the second embodiment of the present invention. In FIG. 2, the same components as those in FIG. 1 are denoted by the same reference numerals used in FIG.

  A tank 18 is provided between the housing 3 and the pump 15. The housing 3 is formed with high density by the front lens 11 and the housing 12. The tank 18 communicates with both the housing 3 and the pump 15 individually. A valve is provided between at least one of the housing 3 and the tank 18 or between the tank 18 and the pump 15. In the present embodiment, a valve 17 is provided between the housing 3 and the tank 18. A valve may be provided in the second tube 19 between the tank 18 and the pump 15. It can also be provided on both the first tube 16 and the second tube 19. The tank 18 may be a brake negative pressure tank. A tank internal pressure sensor 22 that measures the atmospheric pressure in the tank 18 is provided in the tank 18.

  The pump 15 connected to the tank 18 lowers the atmospheric pressure in the tank 18 by sucking the air in the tank 18. By lowering the air pressure in the tank 18, the air in the housing 3 formed with high density by the front lens 11 and the housing 12 is sucked, and the air pressure in the housing 3 is lowered. While the pump 15 is not operating, if the degree of vacuum of the tank 18 becomes a buffer for the casing 3 and the pressure in the tank 18 is smaller than the pressure in the casing 3, the air in the casing 3 is continuously sucked. The decompression in the housing 3 can be maintained. Next, how the atmospheric pressure is controlled by the presence of the tank 18 will be described.

  FIG. 3 is a diagram illustrating the relationship between the air pressure in the tank and the air pressure in the housing 3 and the brake timing of the vehicular lamp device according to the second embodiment of the present invention. The vertical axis of the graph (A) qualitatively shows the pressure in the tank, and the vertical axis of the graph (B) qualitatively shows the pressure inside the housing 3. The horizontal axis of the graph (A) and the horizontal axis of the graph (B) are time, and are synchronized in the upper and lower sides.

  The pump 15 is operated by the first brake, the air in the tank 18 is sucked, and the pressure in the tank 18 is lowered. At the same time, the air in the housing 3 connected to the tank 18 is sucked, and the atmospheric pressure in the housing 3 decreases. After the first brake is completed, the pressure in the tank 18 gradually increases, and the pressure in the housing 3 connected to the tank 18 also increases. The pump 15 is operated by the second brake, the air in the tank 18 is sucked, and the pressure in the tank 18 is lowered. At the same time, the air in the housing 3 connected to the tank 18 is sucked, and the atmospheric pressure in the housing 3 decreases. After the first brake is completed, the pressure in the tank 18 gradually increases, and the pressure in the housing 3 connected to the tank 18 also increases.

  In addition, for example, when the pump 15 is an electric pump, the air in the tank 18 can be gradually sucked and the inside of the housing 3 can be gradually depressurized. Further, the control unit 20 can control the operation of the pump 15 by comparing the value of the pressure sensor 21 in the casing 3 with the value of the tank pressure sensor 22 in the tank 18. Further, the control unit 20 can control the opening and closing of the valve 17 based on the value of the casing internal pressure sensor 21 and the value of the tank internal pressure sensor 22.

  For example, when the value of the casing internal pressure sensor 21 is smaller than the value of the tank internal pressure sensor 22, the valve is closed and the decompressed state in the casing 3 is maintained. On the other hand, when the value of the casing internal pressure sensor 21 is larger than the value of the tank internal pressure sensor 22, the valve is opened and the air in the casing 3 is sucked into the tank 18 so that the atmospheric pressure in the casing 3 is reduced. Lower.

<Configuration and Effect of Embodiment>

  The vehicular lamp device according to the present embodiment is formed with high density and communicates with a housing that radiates light from a light emitting body provided therein, and sucks air in the housing to reduce the pressure. Provide a pump.

  By being configured as described above, it is possible to reduce the atmospheric pressure in the housing formed with high density and to prevent condensation. For this reason, it is hard to condense even if it runs in fog.

  The vehicular lamp device in the present embodiment is provided with a valve between the housing and the pump.

  By comprising as mentioned above, the pressure-reduced state in the housing | casing formed in high density can be controlled and maintained with a valve | bulb, and it can make it hard to dew condensation.

  The vehicular lamp device according to the present embodiment includes a tank that individually communicates with both the housing and the pump, and a valve is provided between at least one of the housing and the tank or between the tank and the pump.

  With the configuration described above, the tank can stably maintain the atmospheric pressure in the housing formed at a high density at a low atmospheric pressure, and can prevent condensation.

  In the vehicle lamp device according to the present embodiment, the pump is a brake booster or a brake vacuum pump.

  By configuring as described above, by diverting the existing device of the vehicle, it is possible to reduce the atmospheric pressure in the casing formed with high density with a simple configuration and to prevent condensation. This eliminates the need for a dedicated pump.

  In the vehicle lamp device according to the present embodiment, the tank is a brake negative pressure tank.

  With the above-described configuration, it is possible to easily reduce the atmospheric pressure in the housing formed at a high density and to prevent condensation by diverting the existing device of the vehicle. This eliminates the need for a dedicated tank.

  The vehicle lamp device according to the present embodiment includes a heater that heats the inside of the housing.

  Constituting as described above can further prevent condensation.

  The vehicular lamp device in the present embodiment decompresses the inside of the housing with an electric pump.

  By being configured as described above, it is possible to reduce the atmospheric pressure in the housing formed with high density with a simple configuration and to prevent condensation. Moreover, it can operate with a vehicle-mounted battery.

  The vehicular lamp device in this embodiment depressurizes the inside of the housing with a mechanical pump.

  By being configured as described above, it is possible to reduce the atmospheric pressure in the housing formed with high density with a simple configuration and to prevent condensation.

  The vehicular lamp device in the present embodiment gradually depressurizes the inside of the housing so as not to be saturated during depressurization.

  By being configured as described above, it is possible to reduce the atmospheric pressure in the housing formed at high density and to make it more difficult for condensation to occur even during decompression. Therefore, it is difficult for condensation to occur even if a light emitting diode with a small amount of heat generation is used.

DESCRIPTION OF SYMBOLS 1 Vehicle 2 Engine room 3 Case 10 Vehicle lamp apparatus 11 Front lens 12 Housing 13 Light emitting diode 14 Heater 15 Pump 16 First tube 17 Valve 19 Second tube 20 Control part 21 In-case pressure sensor 22 In-tank pressure sensor

Claims (10)

A housing that is formed with high density and emits light from a light emitter provided inside,
A vehicular lamp device including a pump that communicates with the casing and sucks and decompresses air in the casing.   The vehicular lamp device according to claim 1, wherein a valve is provided between the housing and the pump.   2. The vehicle according to claim 1, further comprising a tank individually communicating with both the housing and the pump, wherein a valve is provided between at least one of the housing and the tank or between the tank and the pump. Lamp device.   The vehicle lamp device according to any one of claims 1 to 3, wherein the pump is a brake booster or a brake vacuum pump.   The vehicular lamp device according to claim 3, wherein the tank is a brake negative pressure tank.   The vehicular lamp device according to any one of claims 1 to 5, further comprising a heater for heating the inside of the housing.   The vehicular lamp device according to any one of claims 1 to 6, wherein the inside of the housing is decompressed by an electric pump.   The vehicular lamp device according to any one of claims 1 to 6, wherein the inside of the housing is decompressed by a mechanical pump.   The vehicular lamp device according to any one of claims 1 to 8, wherein the interior of the housing is gradually decompressed so as not to be saturated during decompression.   The vehicular lamp device according to any one of claims 1 to 9, wherein the light emitter is a light emitting diode.

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