JP6758164B2 - Vehicle lighting - Google Patents

Description

The present invention relates to a vehicle lamp, and more particularly to a vehicle lamp capable of efficiently cooling a plurality of light source units.

Conventionally, a first light source unit having a first heat sink, a second light source unit having a second heat sink arranged below the first light source unit, and a cooling fan arranged behind the first light source unit and the second light source unit. A vehicle lamp equipped with, has been proposed (see, for example, Patent Document 1 (FIG. 1 and the like)).

In this vehicle lighting fixture, the air flow generated above the cooling fan passes through the heat radiation fins of the first heat sink and blows the outer lens, and then the outer lens, the top surface of the lighting chamber, and the lighting chamber. A first circulating flow that is guided in the order of the rear surface and returns to the cooling fan is created, and the air flow generated at the lower part passes through the heat radiation fins of the second heat sink and blows the outer lens, and then the outer lens and the lamp. A second circulating flow is created that is guided back to the cooling fan by being guided in the order of the bottom surface of the room and the rear surface of the lighting room.

Japanese Patent No. 5160992

However, in the vehicle lamps described in Patent Document 1, since the first circulating flow and the second circulating flow circulate in opposite directions, the respective circulating flows collide with each other and the respective circulating flows are weakened. There is a problem that each light source unit cannot be cooled efficiently.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a vehicle lamp capable of efficiently cooling a plurality of light source units.

In order to achieve the above object, one aspect of the present invention is a first light source unit arranged in the lamp chamber with a space between the lamp chamber and the bottom surface of the lamp chamber, and the lamp chamber and the first light source unit. A cooling fan located behind the light source unit and including an upper portion that generates a first air flow that blows the rear portion of the first light source unit and a lower portion that generates a second air flow that passes through the space. The space is arranged at a position where at least one second light source unit having a lower output than the first light source unit and the second air flow passing through the space are blown into the light room. A guide member that guides the second air flow that has passed upward is provided, and the second light source unit is the first air flow between the upper portion of the cooling fan and the rear portion of the first light source unit. Further, it is a vehicle lighting tool arranged at a position that does not block the second air flow between the lower portion of the cooling fan and the guide member.

According to this aspect, it is possible to provide a vehicle lamp capable of efficiently cooling a plurality of light source units.

This is because, firstly, the first air flow generated in the upper part of the cooling fan blows the rear part of the first light source unit, and then the rear part of the first light source unit, the top surface of the lighting chamber, and the rear surface of the lighting chamber. To create a circulating flow that creates an air flow for the entire lighting chamber that is guided in order and circulates to the suction port of the cooling fan, secondly, the second air flow generated at the bottom of the cooling fan is the first light source unit and the lamp. The guide member is sprayed through the space between the bottom of the chamber, and then the guide member, the top surface of the lamp chamber, and the rear surface of the lamp chamber are guided in this order and circulate to the suction port of the cooling fan. This is due to the creation of a circulating flow that produces an air flow, and thirdly, that all of the created circulating flows circulate in the same direction.

Further, in the above invention, a preferred embodiment is characterized in that the guide member is an extension.

Further, in the above invention, a preferred embodiment further includes an outer lens and a housing constituting the lamp chamber, the guide member is the outer lens and the extension, and the extension is the second one that has passed through the space. It is characterized in that a through hole is formed so that at least a part of the air flow passes through and blows the outer lens.

Further, in the above invention, a preferred embodiment further includes an outer lens and a housing constituting the lamp chamber, the guide member is the outer lens and the extension, and the extension is the second air that has passed through the space. It is characterized in that it is arranged in a state where a space is maintained between it and the bottom surface of the lamp chamber so that at least a part of the flow passes through and blows the outer lens.

Further, in the above invention, a preferred embodiment is to include the plurality of the second light source units, and among the plurality of the second light source units, the rear second light source unit is arranged above the front second light source unit. It is characterized by.

Further, in the above invention, a preferred embodiment further includes a holding member for holding the plurality of second light source units, each of the plurality of second light source units includes a heat radiation fin, and the holding member is the plurality of second light source units. It is characterized in that the plurality of second light source units are held in a state where the heat radiation fins of each light source unit are exposed.

Further, in the above invention, a preferred embodiment is to arrange a first light source unit arranged in the lamp chamber with a space between the lamp chamber and the bottom surface of the lamp chamber, and arrange the first light source unit in the lamp chamber and behind the first light source unit. A cooling fan including an upper portion that generates a first air flow that blows the rear portion of the first light source unit and a lower portion that generates a second air flow that passes through the space is arranged in the lamp chamber. An at least one second light source unit and a guide member arranged in the lighting chamber and at a position where the second air flow passing through the space is blown and guiding the second air flow passing through the space upward. The second light source unit is provided between the first air flow between the upper portion of the cooling fan and the rear portion of the first light source unit, and between the lower portion of the cooling fan and the guide member. The first light source unit and the second light source unit are arranged at a position that does not block the second air flow, and are characterized in that they have the same or substantially the same output.

It is a schematic perspective view of the vehicle lighting equipment 10. (A) is a schematic side view of the vehicle lighting equipment 10, (b) is a result of the simulation of FIG. 2 (a). (A) is a schematic top view of the vehicle lighting fixture 10, (b) is a result of the simulation of FIG. 3 (a). This is the result of the simulation of the first comparative example. This is the result of the simulation of the second comparative example. It is a schematic side view of the vehicle lighting equipment 10 (a modified example). It is a side surface of the bracket 60 and the second light source units 30A to 30D.

Hereinafter, a vehicle lamp 10 according to an embodiment of the present invention will be described with reference to the accompanying drawings. Corresponding components in each figure are designated by the same reference numerals, and duplicate description is omitted.

FIG. 1 is a schematic perspective view of a vehicle lighting tool 10. FIG. 2A is a schematic side view of the vehicle lighting fixture 10. FIG. 3A is a schematic top view of the vehicle lighting fixture 10.

The vehicle lighting fixture 10 shown in FIGS. 1, 2 (a), and 3 (a) is, for example, a vehicle headlight, and is mounted on the left side and the right side of the front end portion of the vehicle (not shown).

As shown in FIGS. 1, 2 (a), and 3 (a), the vehicle lamp 10 of the present embodiment includes a first light source unit 20, a plurality of second light source units 30A to 30D, a cooling fan 40, and an extension. 50, bracket 60 and the like are provided. The vehicle lighting fixture 10 is arranged in a lighting chamber 74 composed of an outer lens 70 and a housing 72, and is attached to the housing 72 or the like. Since the configurations of the second light source units 30A to 30D are common, the second light source unit will be represented by reference numeral 30 below.

The first light source unit 20 is, for example, a light source unit for a traveling beam, which includes a high-power light source (not shown) such as an LED or LD, a lens (not shown) arranged in front of the high-power light source, and a heat sink. It is a so-called direct projection type (also referred to as direct irradiation type) light source unit including 22.

The heat sink 22 includes a base 24 and heat dissipation fins 26. As the material of the heat sink 22, a metal such as aluminum or copper having high thermal conductivity, an alloy thereof, or an alloy such as magnesium having a small specific gravity is used. The heat sink 22 is manufactured by a manufacturing method such as cutting, extrusion, insertion, brazing, and die casting.

A substrate 28 on which a high-power light source is mounted is fixed to the front surface of the base 24. In order to improve the adhesion between the front surface of the base 24 and the substrate 28 and reduce the contact thermal resistance, thermal grease, a heat conductive sheet, a heat conductive adhesive, etc. are used between the front surface of the base 24 and the substrate 28. TIM (Thermal Interface Materials) is provided.

The first light source unit 20 is arranged in the light chamber 74 in a state where the space S1 is maintained between the first light source unit 20 and the bottom surface 74a of the light chamber 74 (see FIG. 2A).

The second light source unit 30 is, for example, a light source unit for a passing beam, and is a low-power light source (not shown) having a lower output than a high-power light source such as an LED or LD, and a lens arranged in front of the low-power light source. It is a so-called direct projection type (also referred to as direct irradiation type) light source unit including (not shown) and a heat sink 32.

The heat sink 32 includes a base 34 and heat dissipation fins 36. As the material of the heat sink 32, a metal such as aluminum or copper having high thermal conductivity, an alloy thereof, or an alloy such as magnesium having a small specific gravity is used. The heat sink 32 is manufactured by a manufacturing method such as cutting, extrusion, insertion, brazing, and die casting.

A substrate 38 on which a low-power light source is mounted is fixed to the front surface of the base 34. In order to improve the adhesion between the front surface of the base 34 and the substrate 38 and reduce the contact thermal resistance, thermal grease, a heat conductive sheet, a heat conductive adhesive, etc. are provided between the front surface of the base 34 and the substrate 38. TIM (Thermal Interface Materials) is provided.

The cooling fan 40 is arranged in the light chamber 74 and behind the first light source unit 20. The cooling fan 40 has an upper portion 42 that generates a first air flow A that blows the rear portion (radiation fin 26) of the first light source unit 20, and a lower portion 44 that generates a second air flow B that passes through the space S1. Including. As the cooling fan 40, an axial flow fan (also referred to as a propeller fan) that generates an air flow in the direction of the rotation axis may be used, or a centrifugal force that generates a swirling flow in a direction substantially perpendicular to the rotation axis by centrifugal force. A fan (also called a blower) may be used. The number of cooling fans 40 may be one or a plurality.

The extension 50 is arranged in the light chamber 74 at a position where the second air flow B that has passed through the space S1 is blown (see FIGS. 2A and 3A). A plurality of through holes 52 are formed in the extension 50 so that a part of the second air flow B (air flow B1) that has passed through the space S1 passes through and blows the outer lens 70 (front surface 74b in the light chamber 74). Is formed. Further, the extension 50 guides the second air flow B (air flow B2) that does not pass through the through hole 52 of the second air flow B that has passed through the space S1 upward (see FIG. 2A). As shown in FIGS. 1 and 2A, the upper portion of the extension 50 may be an inclined surface inclined rearward, or may be a surface other than the inclined surface (for example, a vertical surface). The extension 50 and the outer lens 70 correspond to the guide member of the present invention.

The second light source unit 30 includes a first air flow A between the upper portion 42 of the cooling fan 40 and the rear portion of the first light source unit 20, and a second air flow between the lower portion 44 of the cooling fan 40 and the extension 50. It is arranged at a position that does not block B (see FIG. 3A). Specifically, the second light source unit 30A and the second light source unit 30B are arranged in the space on the right side of the first light source unit 20 (on the right side when facing the front; in the upper middle of FIG. 3A). The second light source unit 30B is arranged behind the second light source unit 30A. Further, the second light source unit 30C and the second light source unit 30D are arranged in the space on the left side of the first light source unit 20 (the left side when facing the front; the middle lower side in FIG. 3A). The second light source unit 30D is arranged behind the second light source unit 30C.

The second light source unit 30B arranged at the rear is arranged above the second light source unit 30A arranged at the front, and the second light source unit 30D arranged at the rear is arranged at the front. 2 Arranged above the light source unit 30C (see FIG. 2A).

The bracket 60 holds the first light source unit 20 and the second light source unit 30 arranged as described above.

As shown in FIG. 1, the bracket 60 is provided with respect to the first holding portion 61 for holding the second light source unit 30A arranged in the space on the right side and in front of the first light source unit 20 and the first light source unit 20. A second holding portion 62 that holds the second light source unit 30B arranged in the space on the right side and rearward, and a first connecting portion 63 that connects the upper portion of the first holding portion 61 and the lower portion of the second holding portion 62. ,including. As the material of the bracket 60, metals such as aluminum and copper having high thermal conductivity, alloys thereof, alloys such as magnesium having a small specific gravity, and synthetic resins are used.

The first connecting portion 63 is arranged above the heat radiation fin 36 of the heat sink 32 of the second light source unit 30A arranged in the space on the right side and in front of the first light source unit 20. The first connecting portion 63 is provided with through holes 63a penetrating vertically in order to improve heat dissipation by the heat radiating fins 36. By providing the through hole 63a, the first circulating flow C1, the second circulating flow C2 and the like can be smoothly circulated without being hindered. In addition, the weight of the vehicle lighting tool 10 can be reduced. The through hole 63a may be omitted.

Further, as shown in FIG. 1, the bracket 60 includes a third holding portion 64 for holding the second light source unit 30C arranged in the space on the left side and in front of the first light source unit 20, and the first light source unit 20. A second connecting portion that connects the fourth holding portion 65 that holds the second light source unit 30D arranged in the space on the left side and the rear side, and the upper portion of the third holding portion 64 and the lower portion of the fourth holding portion 65. 66 and.

The second connecting portion 66 is arranged above the heat radiating fin 36 of the heat sink 32 of the second light source unit 30C arranged in the space on the left side and in front of the first light source unit 20. The second connecting portion 66 is provided with through holes 66a penetrating vertically in order to improve heat dissipation by the heat radiating fins 36. By providing the through hole 66a, the first circulating flow C1, the second circulating flow C2, and the like can be smoothly circulated without being hindered. In addition, the weight of the vehicle lighting tool 10 can be reduced. The through hole 66a may be omitted.

Further, the bracket 60 includes a fifth holding portion 67 that holds the first light source unit 20.

FIG. 7 is a side view of the bracket 60 and the second light source units 30A to 30D.

As shown in FIG. 7, the upper portion 61a (and the upper portion 64a of the third holding portion 64) of the first holding portion 61 of the bracket 60 extends upward from the upper end portion of the heat sink 32, and the air flow (circulating flow C1). Etc.) It plays a role as a spit guide. Further, the lower portion 61b of the first holding portion 61 of the bracket 60 (and the lower portion 64b of the third holding portion 64) extends downward from the lower end portion of the heat sink 32, and is an air flow (circulating flow C3 or the like) suction guide. It plays a role as.

In the vehicle lamp 10 having the above configuration, as shown in FIGS. 2A and 3A, the first air flow A generated in the upper portion 42 of the cooling fan 40 is the rear portion of the first light source unit 20 ( The heat radiating fins 26) are sprayed, and then the rear part of the first light source unit 20 (radiating fins 26), the top surface 74c in the light room 74, and the rear surface 74d in the light room 74 are guided in this order to suck in the cooling fan 40. It creates a first circulating flow C1 that creates an air flow across the light chamber 74 that circulates to (see FIG. 2A). This makes it possible to efficiently cool the first light source unit 20 mainly.

On the other hand, as shown in FIGS. 2A and 3A, the second air flow B generated in the lower portion 44 of the cooling fan 40 is between the first light source unit 20 and the bottom surface 74a of the lighting chamber 74. The extension 50 is blown through the space S1. Then, the second air flow B that blows the extension 50 passes through the through hole 52 and blows the outer lens 70 (front surface 74b in the light chamber 74), and then the outer lens 70 and the top surface in the light chamber 74. The extension 50 does not pass through the through hole 52 and the second circulating flow C2 that is guided in the order of 74c and the rear surface 74d in the light chamber 74 to generate an air flow in the entire light chamber 74 that circulates to the suction port of the cooling fan 40. , A third circulating flow C3 that is guided in the order of the top surface 74c in the light room 74 and the rear surface 74d in the light room 74 to generate an air flow in the entire light room 74 that circulates to the suction port of the cooling fan 40. (See FIG. 2 (a)).

At that time, as shown in FIG. 2A, the second light source unit 30B arranged at the rear is arranged above the second light source unit 30A arranged at the front, and the second light source unit 30B is arranged at the rear. Since the light source unit 30D is arranged above the second light source unit 30C arranged in the front, the second light source unit 30B arranged in the rear is arranged in the front as shown in FIG. 2C. The second circulating flow C2 is compared with the case where the second light source unit 30D arranged below the second light source unit 30A and arranged behind is arranged below the second light source unit 30C arranged in front. , The third circulating flow C3 and the like can be smoothly circulated without being hindered by the second light source units 30A and 30C arranged in front.

The second light source units 30A to 30D are mainly cooled by the overall circulation of the air in the lamp chamber 74 by the first to third circulating flows C1 to C3 created as described above. At that time, since the first to third circulating flows C1 to C3 all circulate in the same direction (see the arrows in FIG. 2A), the respective circulating flows C1 to C3 are not weakened, and the lighting chamber The air in 74 circulates efficiently. As a result, the second light source units 30A to 30D can be efficiently cooled.

Further, since the second circulating flow C2 passes through the outer lens 70 having a relatively low temperature, the second light source unit 30 can be cooled more efficiently.

The present inventor performed a simulation using the vehicle lamp 10 having the above configuration, and confirmed that one cooling fan 40 can efficiently cool a plurality of light source units 20, 30A to 30D to the extent that there is no practical problem. did.

2 (b) and 3 (b) are the results of the simulation. Each arrow in FIGS. 2B and 3B represents a flow velocity vector.

Next, a comparative example will be described.

FIG. 4 shows the result of the simulation of the first comparative example.

In the vehicle lighting fixture of the first comparative example, the second light source unit 30 is additionally arranged between the upper portion 42 of the cooling fan 40 and the rear portion of the first light source unit 20 as compared with the vehicle lighting fixture 10. The difference is that the first air flow A from the upper portion 42 of the cooling fan 40 is blocked by the second light source unit 30, and the second light source units 30C and 30D are omitted. Other than that, it has the same configuration as the vehicle lighting tool 10.

In the first comparative example, it was found that the performance of the first light source unit 20 was reduced by 10% and the performance of the second light source unit 30 was reduced by up to 5% as compared with the vehicle lamp 10.

This is because the first air flow A from the upper 42 of the cooling fan 40 is blocked by the second light source unit 30 additionally arranged, so that the first from the upper 42 of the cooling fan 40 covers the entire rear part of the first light source unit 20. This is because the air flow A does not hit.

FIG. 5 shows the result of the simulation of the second comparative example.

In the vehicle lighting fixture of the second comparative example, the second light source unit 30 is additionally arranged between the lower portion 44 of the cooling fan 40 and the extension 50 as compared with the vehicle lighting fixture 10, and the second light source unit 30 is additionally arranged. The difference is that the second air flow B from the lower portion 44 of the cooling fan 40 is blocked by the unit 30, and the second light source unit 30C is omitted. Other than that, it has the same configuration as the vehicle lighting tool 10.

In the second comparative example, it was found that the performance was lowered by up to 5% as compared with the vehicle lighting tool 10.

This is because the second air flow B from the lower portion 44 of the cooling fan 40 is blocked by the second light source unit 30 additionally arranged, so that the second air flow B (air flow B1) does not reach the outer lens 70. It is a thing. Further, a backflow occurs in the light chamber 74, and the second air flow B is disturbed.

As described above, according to the present embodiment, it is possible to provide a vehicle lamp 10 capable of efficiently cooling a plurality of light source units 20, 30A to 30D with one cooling fan 40.

This is because, as shown in FIG. 2A, first, the first air flow A generated in the upper portion 42 of the cooling fan 40 blows the rear portion (radiating fin 26) of the first light source unit 20, and then , The rear part of the first light source unit 20 (radiating fin 26), the top surface 74c in the light room 74, and the rear surface 74d in the light room 74 are guided in this order, and the air in the entire light room 74 circulates to the suction port of the cooling fan 40. Creating a first circulating flow C1 that creates a flow, secondly, an extension that occurs at the bottom 44 of the cooling fan 40 and passes through the space S1 between the first light source unit 20 and the bottom surface 74a of the light chamber 74. Of the second air flow B that blows 50, the air flow B1 that blows the outer lens 70 (front surface 74b in the light chamber 74) through the through hole 52 of the extension 50 is in the outer lens 70 and the light chamber 74. Creating a second circulating flow C2 that creates an air flow for the entire light chamber 74 that circulates to the suction port of the cooling fan 40, guided in the order of the top surface 74c and the rear surface 74d in the light chamber 74, thirdly, the cooling fan. It occurs in the lower part 44 of 40, passes through the space S1 between the first light source unit 20 and the bottom surface 74a of the light chamber 74, and passes through the through hole 52 of the extension 50 in the second air flow B that blows the extension 50. The air flow B2 that does not flow is guided in the order of the extension 50, the top surface 74c in the light room 74, and the rear surface 74d in the light room 74 to generate an air flow in the entire light room 74 that circulates to the suction port of the cooling fan 40. This is due to the creation of the three circulating flows C3, and fourthly, the first to third circulating flows C1 to C3 all circulate in the same direction (see each arrow in FIG. 2A).

Further, according to the present embodiment, the bracket 60 is in a state where the heat radiation fins 26 and 36 of the plurality of light source units 20 and 30A to 30D are exposed (that is, in a state where through holes 63a and 66a are provided). Since the plurality of light source units 20, 30A to 30D are held, the second circulating flow C2, the third circulating flow C3, and the like can be smoothly circulated.

Further, according to the present embodiment, since the wind flows inside the outer lens 70, the warmed air in the lamp chamber 74 is transferred to the outer lens 70, and the temperature of the outer lens 70 rises. It is possible to prevent snow melting and dew condensation.

Next, a modified example will be described.

In the above embodiment, the extension 50 is blown by a part of the second air flow B (air flow B1) that has passed through the space S1 and blows the outer lens 70 (front surface 74b in the light chamber 74). The example in which the through hole 52 is formed has been described, but the present invention is not limited to this. For example, the through hole 52 may be omitted. In this case, the extension 50 corresponds to the guide member of the present invention.

Also in this modification, it is possible to provide a vehicle lamp 10 capable of efficiently cooling a plurality of light source units 20, 30A to 30D with one cooling fan 40.

This is because, as shown in FIG. 2A, first, the first air flow A generated in the upper portion 42 of the cooling fan 40 blows the rear portion (radiating fin 26) of the first light source unit 20, and then , The rear part of the first light source unit 20 (radiating fin 26), the top surface 74c in the light room 74, and the rear surface 74d in the light room 74 are guided in this order, and the air in the entire light room 74 circulates to the suction port of the cooling fan 40. Creating a first circulating flow C1 that creates a flow, secondly, it occurs at the bottom 44 of the cooling fan 40 and passes through the space S1 between the first light source unit 20 and the bottom surface 74a of the light chamber 74 to extend. The second air flow B that blows 50 is guided in the order of the extension 50, the top surface 74c in the light room 74, and the rear surface 74d in the light room 74, and circulates to the suction port of the cooling fan 40. This is due to the creation of a third circulating flow C3 that produces a flow, and thirdly, that the first and third circulating flows C1 and C3 all circulate in the same direction.

As shown in FIG. 6, the extension 50 has a light chamber 74 so that at least a part (air flow B1) or all of the second air flow B that has passed through the space S1 passes through and blows the outer lens 70. It may be arranged in a state where the space S2 is maintained between the bottom surface 74a and the bottom surface 74a. This also makes it possible to create a second circulating flow C2.

Further, in the above embodiment, an example in which the first light source unit 20 having a higher output than the second light source unit 30 is used as the first light source unit 20 has been described, but the present invention is not limited to this, and is the same as or the same as the second light source unit 30. A light source unit having substantially the same output may be used. Similarly, an example in which a second light source unit 30 having a lower output than the first light source unit 20 is used as the second light source unit 30 has been described, but the present invention is not limited to this, and the output is the same as or substantially the same as that of the first light source unit 20. A light source unit may be used.

Further, in the above embodiment, an example in which a so-called direct projection type (also referred to as a direct irradiation type) light source unit is used as the light source units 20 and 30 has been described, but the present invention is not limited to this, and a reflector type light source unit may also be used. Alternatively, a projector type light source unit may be used.

Further, in the above embodiment, an example in which the light source units 20, 30A to 30D are held by one bracket 60 has been described, but the present invention is not limited to this. For example, the first light source unit 20 may be held by the first bracket (not shown), and the second light source units 30A to 30D may be held by the second bracket (not shown) separate from the first bracket. Good.

Further, in the above embodiment, for convenience of explanation, an example in which a box-shaped lamp chamber 74 composed of the outer lens 70 and the housing 72 is used (see FIG. 1 and the like) has been described. Not limited to this, various shapes can be used as the outer lens 70, the housing 72, and the lighting chamber 74.

Each numerical value shown in each of the above embodiments is an example, and it goes without saying that an appropriate numerical value different from this can be used.

Each of the above embodiments is merely an example in every respect. The present invention is not limitedly interpreted by the description of each of the above embodiments. The present invention can be practiced in various other forms without departing from its spirit or key features.

10 ... Vehicle lighting, 20 ... 1st light source unit, 22 ... Heat sink, 24 ... Base, 26 ... Heat dissipation fins, 28 ... Board, 30 (30A-30D) ... 2nd light source unit, 32 ... Heat sink, 34 ... Base, 36 ... heat sink, 38 ... board, 40 ... cooling fan, 42 ... top, 44 ... bottom, 50 ... extension, 52 ... through hole, 60 ... bracket, 61 ... first holding part, 61a ... top, 61b ... bottom, 62 ... 2nd holding part, 63 ... 1st connecting part, 63a ... through hole, 64 ... 3rd holding part, 64a ... upper part, 64b ... lower part, 65 ... 4th holding part, 66 ... second connecting part, 66a ... Through hole, 67 ... 5th holding part, 70 ... outer lens, 72 ... housing, 74 ... light room, 74a ... bottom surface, 74b ... front surface, 74c ... top surface, 74d ... rear surface, A ... first air flow, B ... 2nd air flow, B1 ... air flow, B2 ... air flow, C1 ... first circulation flow, C2 ... second circulation flow, C3 ... third circulation flow, S1, S2 ... space

Claims (8)

The first light source unit arranged in the lighting room with a space between it and the bottom surface of the lighting room, and
An upper part that is arranged in the lighting chamber and behind the first light source unit and generates a first air flow that blows the rear part of the first light source unit, and a lower part that generates a second air flow that passes through the space. With cooling fan, including
At least one second light source unit arranged in the lighting chamber and having a lower output than the first light source unit, and
A guide member arranged in the lamp chamber and at a position where the second air flow passing through the space is blown, and guiding the second air flow passing through the space upward.
With
The second light source unit includes the first air flow between the upper portion of the cooling fan and the rear portion of the first light source unit, and the second air flow between the lower portion of the cooling fan and the guide member. Vehicle lighting fixtures that are placed in a position that does not block the air flow. The vehicle lighting tool according to claim 1, wherein the guide member is an extension. Further provided with an outer lens and a housing constituting the lighting chamber,
The guide member is the outer lens and the extension.
The vehicle lamp according to claim 1, wherein a through hole is formed in the extension so that at least a part of the second air flow that has passed through the space passes through the extension and blows the outer lens. Further provided with an outer lens and a housing constituting the lighting chamber,
The guide member is the outer lens and the extension.
The extension is arranged in a state of maintaining a space between the extension and the bottom surface of the lamp chamber so that at least a part of the second air flow passing through the space passes through and blows the outer lens. The vehicle lighting equipment according to item 1. With a plurality of the second light source units,
The vehicle lighting fixture according to any one of claims 1 to 4, wherein the rear second light source unit is arranged above the front second light source unit among the plurality of second light source units. A holding member for holding the plurality of second light source units is further provided.
Each of the plurality of second light source units includes a heat radiation fin.
The vehicle lamp according to claim 5, wherein the holding member holds the plurality of second light source units in a state where the heat radiation fins of the plurality of second light source units are exposed. With the plurality of the second light source units,
A holding member for holding the plurality of second light source units is further provided.
Each of the plurality of second light source units includes a heat radiation fin.
The vehicle lamp according to any one of claims 1 to 4, wherein the holding member holds the plurality of second light source units in a state where the heat radiation fins of the plurality of second light source units are exposed. The first light source unit arranged in the lighting room with a space between it and the bottom surface of the lighting room, and
An upper part that is arranged in the lighting chamber and behind the first light source unit and generates a first air flow that blows the rear part of the first light source unit, and a lower part that generates a second air flow that passes through the space. With cooling fan, including
With at least one second light source unit arranged in the lighting chamber,
A guide member arranged in the lamp chamber and at a position where the second air flow passing through the space is blown, and guiding the second air flow passing through the space upward.
With
The second light source unit includes the first air flow between the upper portion of the cooling fan and the rear portion of the first light source unit, and the second air flow between the lower portion of the cooling fan and the guide member. Located in a position that does not block the air flow,
The first light source unit and the second light source unit are vehicle lamps having the same or substantially the same output.