JP2008100551A - Vehicle headlamp - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicle headlamp capable of being efficiently cooled even when a heat sink is arranged at a rear part of a housing. <P>SOLUTION: A cover 8 for flowing air from an opening 7 at a front part of a vehicle body 2 toward the heat sink 6 is provided above the housing 3, and a shape of the cover 8 is made corresponding to a shape of an upper part of the housing 3. Therefore, since the air flowing-in from the opening 7 at the front part of the vehicle body 2 is guided to the heat sink 6 by the cover 8 during traveling of the vehicle, much more amount of air can be flowed-in from the opening part 7 at the front part of the vehicle body 2 toward the heat sink 6, release of heat by the heat sink 6 is promoted, and the headlamp 1 is cooled. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a vehicle headlamp.

  2. Description of the Related Art Conventionally, a vehicle headlamp includes an LED as a light source housed in a housing (headlamp case), a lens provided at the front of the housing, and a heat sink disposed at the top of the housing. (For example, Patent Document 1).

In Patent Document 1, a headlamp is mounted between a bonnet and a bumper at the front of the vehicle body, and a heat sink and an LED are disposed on the upper portion of the housing, so that the headlamp is formed between the bonnet and the lens during traveling. The air flowing from the opening is brought into contact with the heat sink to dissipate heat to cool the headlamp.
JP 2005-63754 A

  However, in the conventional technology described above, when the heat sink is arranged at the rear part of the housing, air flowing from the opening of the front part of the vehicle body diffuses in the space formed between the bonnet and the housing. There is a problem that it is difficult for air to come into contact with the heat sink and to efficiently cool the headlamp.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to obtain a vehicle headlamp that can be efficiently cooled even when a heat sink is disposed at the rear portion of the housing.

  To achieve the above object, the invention of claim 1 includes a housing, a light source accommodated in the housing, a lens provided in a front portion of the housing, a heat sink disposed in a rear portion of the housing, In a vehicle headlamp attached to the front portion of the vehicle body so that an opening is formed between the front end of the vehicle body and the front end of the housing, between the vehicle body and the housing, A cover for guiding the air flowing in from the opening to the heat sink is interposed.

  According to a second aspect of the invention, in the first aspect of the invention, the cover is provided on at least one of the upper side and the lower side of the housing, and the shape of the cover is made to correspond to the shape of the housing.

  According to a third aspect of the invention, in the second aspect of the invention, the cover provided below the housing is inclined downward from the heat sink toward the opening.

  According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, a width direction of the vehicle body is provided on at least one of the opening side of the cover and the opening side of the housing. It was set as the structure which provided the rib extended to.

  The invention of claim 5 is the invention of claim 4, wherein the rib is divided into a plurality of parts and arranged in the width direction of the vehicle body.

  According to the first aspect of the present invention, when the cover is interposed between the vehicle body and the housing so as to guide the air flowing in from the opening at the front of the vehicle body to the heat sink while the vehicle is running, the cover is not interposed. Compared with the heat sink, more air flowing in from the opening can be brought into contact with the heat sink, so that heat radiation from the heat sink can be promoted. Thus, the headlamp can be efficiently cooled even when the heat sink is disposed at the rear of the housing.

  According to the invention of claim 2, since the shape of the cover provided on at least one of the upper and lower sides of the housing corresponds to the shape of the housing, air smoothly flows from the opening at the front of the vehicle body toward the heat sink. In this case, since air can be brought into contact with the surface of the housing, the headlamp can be cooled more efficiently.

  According to the invention of claim 3, since the cover provided below the housing is inclined downwardly from the heat sink toward the opening in the front part of the vehicle body, foreign matter enters the inside through the opening part in the front part of the vehicle body. In addition, when water flows in along with the air from the opening at the front of the vehicle body, the water can be smoothly discharged along the inclined cover.

  According to the fourth aspect of the present invention, the foreign matter is prevented from entering since it is blocked by the rib when the foreign matter enters through the opening of the front portion of the vehicle body with the inflow of air.

  According to the invention of claim 5, since the rib provided on at least one of the opening side of the cover and the opening side of the housing is divided into a plurality of parts and arranged in the width direction of the vehicle body, the vehicle body is viewed from the front. The appearance can be improved.

  Hereinafter, a vehicle headlamp according to an embodiment of the present invention will be described with reference to the drawings.

(First Embodiment) FIG. 1 is a perspective view showing a vehicular headlamp according to the present embodiment, FIG. 2 is a front view showing the vehicular headlamp, and FIG. 3 is taken along line AA in FIG. It is a longitudinal cross-sectional view. In FIG. 1, for the sake of explanation, a part of the cover is omitted. Moreover, the arrow of FIG. 3 has shown the flow of air.

  As shown in FIGS. 1 to 3, the headlamp 1 of the present embodiment is attached to the front portion of the vehicle body 2 to irradiate the front of the vehicle body 2. The headlamp 1 includes a housing 3, a light source 4 accommodated in the housing 3, a lens 5 provided at the front of the housing 3, a heat sink 6 disposed at the rear of the housing 3, a bonnet 11, And a cover 8 interposed between the fender 12 (vehicle body 2) and the housing 3.

  The upper portion of the housing 3 is inclined downward from the front end toward the rear heat sink 6, and the lower portion of the housing 3 is inclined upward from the front end toward the rear heat sink 6.

  The light source 4 is attached to the heat sink 6 via a support bracket 9, and the heat sink 6 has a plurality of heat radiation fins 10 protruding rearward.

  In the present embodiment, the headlamp 1 is attached to the vehicle body 2 so that the opening 7 is formed between the upper front end of the housing 3 and the front ends of the bonnet 11 and the fender 12. And the shape of the opening part 7 is carrying out the shape extended in the width direction of the vehicle body 2, as shown in FIG.

  Further, in the present embodiment, the shape of the cover 8 provided above the housing 3 is made to correspond to the shape of the upper portion of the housing 3 so that the air flowing from the opening 7 can be guided to the heat sink 6. Yes.

  In the present embodiment described above, the air flowing from the opening 7 at the front part of the vehicle body 2 is guided to the heat sink 6 by the cover 8 during traveling of the vehicle. As a result, more air can flow in toward the heat sink 6, and more air that flows in toward the heat sink 6 flows backward along the plurality of radiation fins 10. Thereby, the heat radiation by the radiation fin 10 is promoted, and the headlamp 1 is cooled.

  According to the present embodiment described above, the cover 8 that guides the air flowing from the opening 7 at the front portion of the vehicle body 2 to the heat sink 6 while the vehicle is running is interposed between the vehicle body 2 and the housing 3. Even when the heat sink 6 is arranged at the rear part of the housing 3, the headlamp 1 can be efficiently cooled.

  Further, according to the present embodiment, the shape of the cover 8 provided above the housing 3 corresponds to the shape of the upper portion of the housing 3, so that the smooth opening from the opening 7 at the front portion of the vehicle body 2 toward the heat sink 6 can be performed smoothly. Since air can be allowed to flow into the housing 3 and the air can be brought into contact with the surface of the housing 3 at that time, the headlamp 1 can be cooled more efficiently.

(Second Embodiment) FIG. 4 is a front view showing a vehicle headlamp according to this embodiment, and FIG. 5 is a longitudinal sectional view taken along line BB of FIG. 4 and 5, the same components as those shown in FIGS. 1 to 3 described above are denoted by the same reference numerals. Moreover, the arrow of FIG. 5 has shown the flow of air.

  As shown in FIGS. 4 and 5, the headlamp 21 of the present embodiment has a rib 22 extending in the width direction of the vehicle body 2 on the opening 7 side (front side) of the housing 3 as compared to the first embodiment. The difference is that the opening is formed above the rib 22 and the other configurations are basically the same.

  Even in the present embodiment, the air flowing from the opening 7 at the front of the vehicle body 2 is guided to the heat sink 6 by the cover 8 during traveling of the vehicle. Therefore, more air can flow in toward the heat sink 6, and more air that flows in toward the heat sink 6 flows backward along the plurality of radiation fins 10. Thereby, the heat radiation by the radiation fin 10 is promoted, and the headlamp 21 is cooled. Further, when the foreign matter 23 tries to enter with the inflow of air from the opening 7 in the front portion of the vehicle body 2, the entry of the foreign matter 23 is blocked by the rib 22.

  According to the present embodiment as described above, the same effect as in the first embodiment can be obtained.

  Furthermore, according to the present embodiment, the rib 22 extending in the width direction of the vehicle body 2 is provided on the opening 7 side (front side) of the housing 3, and the opening is formed above the rib 22. It is possible to suppress the intrusion of the foreign matter 23 without obstructing the inflow of air from the rib 22.

(Third Embodiment) FIG. 6 is a front view showing a vehicle headlamp according to this embodiment, and FIG. 7 is a longitudinal sectional view taken along the line CC of FIG. 6 and 7, the same components as those shown in FIGS. 1 to 5 described above are denoted by the same reference numerals. Moreover, the arrow of FIG. 7 has shown the flow of air.

  As shown in FIGS. 6 and 7, the headlamp 31 of the present embodiment has a cover 32 provided below the housing 3 as compared to the first embodiment, and the shape of the cover 32 is the same as that of the housing 3. It corresponds to the shape of the lower part and the opening 33 of the front part of the vehicle body 2 is different between the front bumper 34 and the lower part of the housing 3, and other configurations are different. Basically the same.

  Even in the present embodiment, the air flowing from the opening 33 at the front of the vehicle body 2 is guided to the heat sink 6 by the cover 32 during traveling of the vehicle. Therefore, more air can flow in toward the heat sink 6, and more air that flows in toward the heat sink 6 flows backward along the plurality of radiation fins 10. Thereby, the heat radiation by the radiation fin 10 is promoted, and the headlamp 31 is cooled.

  Further, in this embodiment, the cover 32 is provided below the housing 3 so that the shape of the cover 32 corresponds to the shape of the lower portion of the housing 3, so that the cover 32 is opened from the heat sink 6 to the front portion of the vehicle body 2. It will be provided so as to incline downward toward 33.

  According to the present embodiment as described above, the same effect as in the first embodiment can be obtained.

  Furthermore, according to the present embodiment, the cover 32 is inclined downward from the heat sink 6 toward the opening 33 at the front of the vehicle body 2, so that foreign matter enters the inside through the opening 33 at the front of the vehicle 3. In addition, when water flows in along with the inflow of air from the opening 33 at the front of the vehicle body 2, the water can be smoothly discharged along the inclined cover 32.

(Fourth Embodiment) FIG. 8 is a front view showing a vehicle headlamp according to this embodiment, and FIG. 9 is a longitudinal sectional view taken along the line DD of FIG. 8 and 9, the same components as those shown in FIGS. 1 to 7 described above are denoted by the same reference numerals. Moreover, the arrow of FIG. 9 has shown the flow of air.

  As shown in FIGS. 8 and 9, the headlamp 41 of the present embodiment has a rib 42 extending in the width direction of the vehicle body 2 on the opening 33 side (front side) of the cover 32 as compared to the third embodiment. The difference is that an opening is formed above the rib 42, and other configurations are basically the same.

  Even in the present embodiment, the air flowing from the opening 33 at the front of the vehicle body 2 is guided to the heat sink 6 by the cover 32 during traveling of the vehicle. Therefore, more air can flow in toward the heat sink 6, and more air that flows in toward the heat sink 6 flows backward along the plurality of radiation fins 10. Thereby, the heat radiation by the radiation fin 10 is promoted, and the headlamp 41 is cooled.

  Further, when the foreign matter 43 tries to enter through the opening 7 at the front portion of the vehicle body 2 with the inflow of air, the entry of the foreign matter 43 is blocked by the rib 42.

  In the present embodiment as described above, the same effect as in the third embodiment can be obtained. Furthermore, according to the present embodiment, the intrusion of the foreign matter 43 can be suppressed by the rib 42 without hindering the inflow of air from the opening 7 at the front portion of the vehicle body 2.

(Fifth Embodiment) FIG. 10 is a front view showing a vehicle headlamp according to this embodiment. 10, the same components as those shown in FIGS. 1 to 9 described above are denoted by the same reference numerals.

  As shown in FIG. 10, the headlamp 51 of this embodiment is different from the fourth embodiment in that the rib 52 is divided into a plurality of parts and arranged in the width direction of the vehicle body 2. The configuration is basically the same.

  Even in the present embodiment, the same effect as in the fourth embodiment can be obtained. Furthermore, in the present embodiment, by dividing the rib 52 into a plurality of parts and arranging them in the width direction of the vehicle body 2, it is possible to improve the appearance when the vehicle body 2 is viewed from the front.

  In the first and second embodiments, the case where the cover 8 is provided above the housing 3 is illustrated. In the third to fifth embodiments, the cover 32 is provided below the housing 3. However, the present invention is not limited to the above-described embodiment, and various embodiments can be employed without departing from the scope of the invention.

  For example, by providing a cover above and below the housing 3, it is possible to allow a larger amount of air to flow from the opening at the front of the vehicle body 2 toward the heat sink 6 while the vehicle is running. Furthermore, in the second embodiment, the case where the rib 22 extending in the width direction of the vehicle body 2 is provided on the opening 7 side of the housing 3 is illustrated. However, the rib 22 is divided into a plurality of portions in the width direction of the vehicle body 2. It can also be arranged.

1 is a perspective view showing a vehicle headlamp according to a first embodiment of the present invention. 1 is a front view showing a vehicle headlamp according to a first embodiment of the present invention. It is a longitudinal cross-sectional view which follows the AA line of FIG. It is a front view which shows the headlamp for vehicles concerning 2nd Embodiment of this invention. It is a longitudinal cross-sectional view which follows the BB line of FIG. It is a front view which shows the headlamp for vehicles concerning 3rd Embodiment of this invention. It is a longitudinal cross-sectional view which follows the CC line of FIG. It is a front view which shows the headlamp for vehicles concerning 4th Embodiment of this invention. It is a longitudinal cross-sectional view which follows the DD line | wire of FIG. It is a front view which shows the headlamp for vehicles concerning 5th Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Headlamp 2 Car body 3 Housing 4 Light source 5 Lens 6 Heat sink 7 Opening part 8 Cover 10 Radiation fin 21 Headlamp 22 Rib 23 Foreign material 31 Headlamp 32 Cover 33 Opening 41 Headlamp 42 Rib 43 Foreign object 51 Headlamp 52 Rib

Claims (5)

A housing, a light source housed in the housing, a lens provided at a front portion of the housing, and a heat sink disposed at a rear portion of the housing, and provided between a front end of a vehicle body and the front end of the housing In the vehicle headlamp attached to the front of the vehicle body so that the opening is formed,
A vehicle headlamp characterized in that a cover for guiding air flowing from the opening to the heat sink is interposed between the vehicle body and the housing.   2. The vehicle headlamp according to claim 1, wherein the cover is provided on at least one of the upper and lower sides of the housing, and the shape of the cover corresponds to the shape of the housing.   The vehicle headlamp according to claim 2, wherein the cover provided under the housing is inclined downward from the heat sink toward the opening.   The rib extended in the width direction of the said vehicle body was provided in at least one of the said opening part side of the said cover, and the said opening part side of the said housing, The any one of Claims 1-3 characterized by the above-mentioned. Vehicle headlamps.   The vehicle headlamp according to claim 4, wherein the rib is divided into a plurality of parts and arranged in the width direction of the vehicle body.

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