Vehicle lamp

Abstract

A vehicle lamp is provided that is capable of enhancing flexibility of installation of air blowing means. A vehicle lamp (1) includes: a first unit (10) that includes a first light source (11) emitting light in a front direction, a first base member (13) as a plate material for mounting the first light source (11), and a first heat dissipation fin (14); and a second unit (20) that includes a second light source (21) emitting light in an upper direction, a second base member (24) as a plate material for mounting the second light source (21), and a second heat dissipation fin (26), the first unit (10) and the second unit (20) being arranged to be aligned, the second unit (20) further includes a third base member (25) as a plate material which is connected to the second base member (24) and extends in an extending direction of the first base member (13), the first heat dissipation fin (14) extends from the first base member (13) in a rear direction, and the second heat dissipation fin (26) extends from the third base member (25) along the first heat dissipation fin (14).

Description

[Technical Field]

[0001] The present invention relates to a vehicle lamp.[Background Art]

[0002] In related art, a vehicle lamp has been suggested that includes a first light source unit which has a first light source emitting light forward direction and a second light source unit which has a second light source emitting light upward such that light is emitted forward through a reflector (for example, see Patent Literature 1). In this vehicle lamp, the first light source unit and the second light source unit are adjacently arranged in a lateral direction. In the vehicle lamp, the first light source unit is of a direct emission type which emits light from the first light source directly forward, has the first light source mounted on a front surface of a base portion, and includes a heat dissipation fin which extends rearward from a rear surface of the base portion. Further, the second light source unit is of a projector type which reflects light from the second light source in a front direction by the reflector, has the second light source mounted on an upper surface of a base portion, and includes a heat dissipation fin which extends downward from a lower surface of the base portion.[Citation List][Patent Literature]

[0003] [Patent Literature 1] Japanese Patent No. 6736978[Summary of Invention][Technical Problem]

[0004] Here, in a vehicle lamp disclosed in Patent Literature 1, a heat dissipation fin protrudes rearward from a base portion in a first light source unit, and a heat dissipation fin protrudes downward from a base portion in a second light source unit. Thus, in a case where air blowing means for facilitating heat dissipation is installed, the air blowing means can be installed only in a position where an airflow becomes appropriate for both of the heat dissipation fin protruding rearward and the heat dissipation fin protruding downward, and flexibility about installation of the air blowing means has not been very high.

[0005] The present invention has been made to solve such a problem in related art, and an object thereof is to provide a vehicle lamp that is capable of enhancing flexibility of installation of air blowing means.[Solution to Problem]

[0006] A vehicle lamp according to the present disclosure is a vehicle lamp including: a first unit that includes a first light source emitting light in a first direction, a first base member as a plate material for mounting the first light source, and a first heat dissipation fin; and a second unit that includes a second light source emitting light in a second direction intersecting with the first direction, a second base member as a plate material for mounting the second light source, and a second heat dissipation fin, the first unit and the second unit being arranged to be aligned, in which the second unit further includes a third base member as a plate material which is connected to the second base member and extends in an extending direction of the first base member, the first heat dissipation fin extends from the first base member to an opposite side to the first direction, and the second heat dissipation fin extends from the third base member in an extending direction of the first heat dissipation fin.[Advantageous Effect of Invention]

[0007] The present disclosure can provide a vehicle lamp that is capable of enhancing flexibility of installation of air blowing means.[Brief Description of Drawings]

[0008] [Figure 1] Figure 1 is a front view illustrating a vehicle lamp according to the present embodiment. [Figure 2] Figure 2 is a front perspective view illustrating a part of a configuration in Figure 1. [Figure 3] Figure 3 is a front perspective view illustrating a part of a configuration in Figure 2. [Figure 4] Figure 4 is a rear perspective view illustrating a part of the configuration in Figure 2. [Figure 5] Figure 5 is a cross-sectional view along IV-IV in Figure 2. [Figure 6] Figure 6 is a perspective view illustrating a fan and a bracket which are illustrated in Figure 2. [Figure 7] Figure 7 is a cross-sectional view along VI-VI in Figure 2. [Description of Embodiment]

[0009] A vehicle lamp according to an embodiment of the present disclosure will hereinafter be described. The present invention is not limited to the embodiment and can appropriately be changed without departing from the scope of the gist of the present invention. Further, in the embodiment, there are sections in which illustrations and descriptions about a part of configurations are skipped, but it goes without saying that about details of techniques which are skipped, publicly known or well-known techniques are appropriately applied within the scope in which no contradiction occurs with the contents described hereinafter.

[0010] Figure 1 is a front view illustrating a vehicle lamp according to the present embodiment, and Figure 2 is a front perspective view illustrating a part of a configuration in Figure 1. Note that for convenience of easy understanding of an illustration, Figure 1 does not illustrate configurations such as an outer lens and a frame which are provided in front of the configuration illustrated in Figure 1.

[0011] A vehicle lamp 1 illustrated in Figure 1 is a headlight to be provided in a right front portion of a vehicle, for example, and includes a first unit 10, a second unit 20, and a projection lens 2 to be provided in front of those. The vehicle lamp 1 has a configuration in which the first unit 10 and the second unit 20 are arranged to be aligned in a lateral direction. The projection lens 2 receives light of a first light source (a reference numeral 11 described later) of the first unit 10 and light of a second light source (a reference numeral 21 described later) of the second unit 20 and emits the light so as to form a predetermined optical path.

[0012] As illustrated in Figure 2, the first unit 10 is a lighting device unit for forming so-called high beam light distribution and includes a circuit board CB1 on which a first light source 11 is mounted, a lens 12, and a first base member 13. The first light source 11 emits light in a front direction (first direction) of the vehicle. The first light source 11 is mounted on the circuit board CB1 which performs light emission control for the first light source 11. The circuit board CB1 is mounted on the first base member 13. The lens 12 is an optical lens for a high beam, which is provided in front of the first light source 11, and is fixed to the first base member 13 by screw members or the like via the circuit board CB1. The first base member 13 is a plate material formed of metal for mounting the first light source 11. The first base member 13 is provided such that a normal direction of the plate material is set to the front direction.

[0013] In such a first unit 10, the normal direction of the first base member 13 is set to the front direction, and the first light source 11 is mounted on the first base member 13 via the circuit board CB1. Thus, the first unit 10 is configured as a lighting device of a direct emission type which emits light from the first light source 11 in the front direction of the vehicle via the lens 12.

[0014] The second unit 20 is a lighting device unit for forming so-called low beam light distribution and includes a circuit board CB2 on which a second light source 21 is mounted, a reflector 22, a shade 23, and a second base member 24. The second light source 21 emits light in an upper direction (a second direction intersecting with the first direction) of the vehicle. The second light source 21 is mounted on the circuit board CB2 which performs light emission control for the second light source 21. The circuit board CB2 is mounted on the second base member 24. The reflector 22 has a reflection surface based on a rotary elliptical surface on an inner side surface and is arranged such that the reflector 22 covers an upper area of the second light source 21 and an open side of the rotary elliptical surface is directed in the front direction of the vehicle. The shade 23 forms a cut-off line for a low beam by a cutting portion 23a that cuts a part of light which is emitted from the second light source 21 and is reflected by the reflector 22. The shade 23 is provided to project upward from a front end portion of the second base member 24. The second base member 24 is a plate material formed of metal for mounting the second light source 21. The second base member 24 is provided such that a normal direction of the plate material is set to the upper direction.

[0015] In such a second unit 20, the normal direction of the second base member 24 is set to the upper direction, and the second light source 21 is mounted on the second base member 24 via the circuit board CB2. Further, the second unit 20 is installed such that the reflector 22 covers the upper area of the second light source 21 and the open side of the rotary elliptical surface is provided in the front direction of the vehicle. Thus, the second unit 20 is configured as a lighting device of a projector type which emits light from the second light source 21 in the front direction of the vehicle via the reflector 22.

[0016] Figure 3 is a front perspective view illustrating a part of a configuration in Figure 2, and Figure 4 is a rear perspective view illustrating a part of the configuration in Figure 2. Further, Figure 5 is a cross-sectional view along IV-IV in Figure 2.

[0017] The first base member 13 and the second base member 24, which are illustrated in Figure 3 and Figure 4, are continuous and integrated. Further, as illustrated in Figure 3 to Figure 5, the first unit 10 (see Figure 1) further includes first heat dissipation fins 14.

[0018] The first heat dissipation fins 14 are a plurality of plate materials formed of metal, which are integrally provided with the first base member 13. The first heat dissipation fin 14 is provided to extend rearward (an opposite side to the first direction) from the first base member 13. Note that the first heat dissipation fin 14 is formed to extend in the lateral direction (in detail, in parallel with the second base member 24) in which the first unit 10 and the second unit 20 are aligned but is not particularly limited to this and may have an angle with respect to the lateral direction.

[0019] In addition, as illustrated in Figure 4 and Figure 5, the second unit 20 (see Figure 1) includes a third base member 25 and second heat dissipation fins 26. The third base member 25 is a plate material, which is integrally connected to the second base member 24 and extends from the second base member 24 in an extending direction (up-down direction) of the first base member 13. Note that the third base member 25 is not limited to a case where it extends in parallel with the extending direction of the first base member 13 and may have a certain angle (for example, within approximately 20°) with respect to the parallel direction.

[0020] The second heat dissipation fins 26 are a plurality of plate materials formed of metal, which are integrally provided with the third base member 25. The second heat dissipation fin 26 is formed to extend from the third base member 25 in a rear direction which is the same direction as the first heat dissipation fin 14. Similarly to the first heat dissipation fin 14, the second heat dissipation fin 26 is also formed to extend in the lateral direction (in detail, in parallel with the second base member 24) in which the first unit 10 and the second unit 20 are aligned. However, the second heat dissipation fin 26 is not limited to this and may have an angle with respect to the lateral direction.

[0021] As described above, the vehicle lamp 1 according to the present embodiment has the units 10 and 20 of the direct emission type and the projector type, and the first light source 11 and the second light source 21 emit light in respectively different directions. Thus, as for the first base member 13 and the second base member 24 on which the light sources 11 and 21 are mounted, their normal directions are different. Thus, in a lighting device in which heat dissipation fins are formed simply on the base members 13 and 24, an extending direction of each of the heat dissipation fins becomes different. However, because the vehicle lamp 1 (see Figure 1) according to the present embodiment includes the third base member 25 which extends from the second base member 24 of the second unit 20 in the same direction as the extending direction of the first base member 13, the second heat dissipation fin 26 can be extended from the third base member 25. As a result, in the vehicle lamp 1, the first heat dissipation fin 14 extending from the first base member 13 and the second heat dissipation fin 26 extending from the third base member 25 can be set in the same direction.

[0022] Here, as illustrated in Figure 5, the third base member 25 is provided in the normal direction of the second base member 24 from the second light source 21. Thereby, the third base member 25 is provided directly below the second light source 21, for example. Accordingly, the vehicle lamp 1 can suppress lowering of heat dissipation by presence of the third base member 25 which is interposed between the second base member 24 and the second heat dissipation fins 26. Note that in an example illustrated in Figure 5, the whole third base member 25 is provided to agree with a normal direction of the second light source 21, but this is not restrictive, and a connection portion C between the second base member 24 and the third base member 25 may be provided in a position in the normal direction of the second light source 21.

[0023] In addition, as illustrated in Figure 4, it is preferable that pluralities of (at least one or more) first heat dissipation fins 14 and second heat dissipation fins 26 be continuous and integrated. Accordingly, a heat dissipation path provided between each other of the fins 14 and 26 becomes continuous, for example. Here, when the heat dissipation path between the first heat dissipation fin 14 and the second heat dissipation fin 26 is discontinuous, this can allow easy occurrence of retention of heat in a discontinuous portion and can become a cause of lowering of the heat dissipation. However, in the vehicle lamp 1 according to the present embodiment, because at least one or more first heat dissipation fins 14 and second heat dissipation fins 26 are continuous and integrated, at least one heat dissipation path becomes continuous. Thus, the vehicle lamp 1 includes a fin structure which contributes to reduction in a possibility of retention of heat.

[0024] In addition, as illustrated in Figure 3 and Figure 5, the second unit 20 includes a plurality of third heat dissipation fins 27 as plate materials formed of metal, which are integrally provided with the third base member 25. Here, the third heat dissipation fin 27 is provided to extend not in the rear direction but in the front direction of the third base member 25. As illustrated in Figure 3, in the present embodiment, the second light source 21 is positioned in the rear of the first light source 11. Further, as illustrated in Figure 5, the third base member 25 is provided directly below, for example, the second light source 21. Because of such a configuration, the third base member 25 is also positioned slightly in the rear, and a space is present in front of the third base member 25. By using this space, the third heat dissipation fin 27 is provided to extend in the front direction of the third base member 25. Note that in the present embodiment, the third heat dissipation fins 27 are formed such that a heat dissipation path is provided in the up-down direction. That is, the heat dissipation path of the third heat dissipation fins 27 intersects with (is orthogonal to) the heat dissipation path of the second heat dissipation fins 26.

[0025] Figure 2 is again referred to. The vehicle lamp 1 according to the present embodiment further includes a fan (air blowing means) 30 and a bracket 40. Figure 6 is a perspective view illustrating the fan 30 and the bracket 40 which are illustrated in Figure 2, and Figure 7 is a cross-sectional view along VI-VI in Figure 2. Note that a cross section along VI-VI is a cross section which is parallel with the first heat dissipation fins 14 and the second heat dissipation fins 26.

[0026] The fan 30 illustrated in Figure 6 and Figure 7 blows air to the first heat dissipation fins 14 (first base member 13) and the second heat dissipation fins 26 (third base member 25). The fan 30 is provided in a position in the rear of the first heat dissipation fins 14 and blows air forward.

[0027] The bracket 40 is interposed between the fan 30 and the first heat dissipation fins 14 and second heat dissipation fins 26. The bracket 40 includes a first guide portion (guide portion) 41, which guides an airflow from the fan 30 to the first heat dissipation fins 14, and a second guide portion (guide portion) 42, which guides the airflow from the fan 30 to the second heat dissipation fins 26, and guides the airflow to each of the heat dissipation fins 14 and 26.

[0028] As illustrated in Figure 6 and Figure 7, the first guide portion 41 is configured with an opening hole portion, which is positioned on one side of the fan 30, in the bracket 40. The first guide portion 41 is an opening hole portion having a generally semicircular shape. The first guide portion 41 has a one-side surface 41a and an other-side surface 41b which face an opening hole. In the one-side surface 41a, a distal end positioned in the front direction is inclined to another side. On the other hand, in the other-side surface 41b as well, a distal end positioned in the front direction is slightly inclined to the other side, but its inclination angle is smaller than that of the one-side surface 41a. Because of such a configuration, in the first guide portion 41, an opening hole area of an outlet is set smaller than an opening hole area of an inlet. Furthermore, an opening hole inlet and an opening hole outlet are generally parallel (for example, a difference between plane angles of both of those is within 20°). Thus, the airflow from the fan 30 is supplied to the first heat dissipation fins 14 in a state where a flow speed is increased by the first guide portion 41.

[0029] The second guide portion 42 is configured with an opening hole portion, which is positioned on the other side of the fan 30, in the bracket 40. In the second guide portion 42, an inlet side of the opening hole portion has a generally semicircular shape, and an outlet side of the opening hole portion has a rectangular shape. The second guide portion 42 has a one-side surface 42a which faces an opening hole. A front side of the one-side surface 42a is largely inclined to the other side. Thus, the airflow from the fan 30 is supplied to the second heat dissipation fins 26 by the second guide portion 42. Note that the second guide portion 42 has a flat plate 43 opposed to the one-side surface 42a. Here, in the second guide portion 42 as well, an area of an opening hole outlet is set smaller than an area of an opening hole inlet. Thus, the airflow from the fan 30 is supplied to the second heat dissipation fins 26 while the flow speed is also increased by the second guide portion 42. Note that because the opening hole inlet and the opening hole outlet of the first guide portion 41 are generally parallel, the flow speed is more easily increased. On the other hand, because the opening hole inlet and the opening hole outlet of the second guide portion 42 are not generally parallel, there is a possibility that an effect of increasing the flow speed becomes low compared to the first guide portion 41. However, this does not change the fact that the second guide portion 42 exhibits the effect of increasing the flow speed.

[0030] Here, as illustrated in the cross-sectional view in Figure 7, the third base member 25 has a structure which is inclined with respect to a surface 13a, in the first base member 13, on a mounting side of the first light source 11. An inclination direction is a direction along an air blowing direction to the second heat dissipation fins 26. That is, compared to the surface 13a, the third base member 25 has an inclination that is inclined in a direction in which a far side from the fan 30 is positioned further away from the fan 30.

[0031] In addition, as illustrated in the cross-sectional view in Figure 7, the first base member 13 includes an inclination portion 13b on the second base member 24 side (other side). The inclination portion 13b guides the airflow such that the airflow directed from the fan 30 to the first heat dissipation fins 14 reaches the first heat dissipation fins 14 and the airflow which has reached there is directed opposite to the second heat dissipation fins 26 side. The inclination portion 13b is formed by making thick a part of the first base member 13 on a rear side.

[0032] A description will be made more in detail. First, the one-side surface 41a of the first guide portion 41 produces an airflow A1 which flows in parallel with the one-side surface 41a. In the vehicle lamp 1, an angle formed between the airflow A1 and the inclination portion 13b (an angle formed on the one side) is equal to or greater than 90°. In addition, the other-side surface 41b of the first guide portion 41 produces an airflow A2 which flows in parallel with the other-side surface 41b. In the vehicle lamp 1, an angle formed between the airflow A2 and the inclination portion 13b (an angle formed on the one side) is equal to or greater than 90°. Thus, the airflow guided by the first guide portion 41 rebounds to the one side (an opposite side to the second heat dissipation fins 26) due to such an angle setting of the inclination portion 13b. As a result, the vehicle lamp 1 can reduce a possibility that the airflow flows to the second heat dissipation fins 26 side and is retained.

[0033] Next, a description will be made about an action of the vehicle lamp 1 according to the present embodiment. First, in the vehicle lamp 1, the third base member 25 is provided for the second base member 24, and the third base member 25 is provided in the extending direction of the first base member 13. Thus, in the vehicle lamp 1, the first heat dissipation fin 14 provided on the first base member 13 and the second heat dissipation fin 26 provided on the third base member 25 can be provided to extend in the same direction. Accordingly, the vehicle lamp 1 can be less subjected to constraints on an installation position of the fan 30 due to a difference between the extending directions of the heat dissipation fins.

[0034] In particular, in the vehicle lamp 1, because both of the heat dissipation fins 14 and 26 can be extended in the same direction, at least one of both of the heat dissipation fins 14 and 26 can integrally be formed to be continuous, and it also becomes possible to make the heat dissipation path become continuous.

[0035] Further, the third base member 25 is provided in the normal direction of the second base member 24 from a position of the second light source 21, that is, directly below the second light source 21. Thus, in the vehicle lamp 1, heat of the second light source 21 can quickly be transmitted to the third base member 25 and can thereby be dissipated from the second heat dissipation fins 26.

[0036] In addition, because the second light source 21 is provided in the rear of the first light source 11, the third base member 25 provided directly below the second light source 21 is also positioned slightly in the rear. Thus, in the vehicle lamp 1, the third heat dissipation fins 27 can be provided in front of the third base member 25.

[0037] In addition, the vehicle lamp 1 includes the bracket 40 which has the first guide portion 41 and the second guide portion 42 between the fan 30 and the first heat dissipation fins 14 and second heat dissipation fins 26. Thus, the vehicle lamp 1 can guide the airflow from the fan 30 by the first guide portion 41 and the second guide portion 42, is less subjected to restrictions on the installation position of the fan 30, and can improve flexibility of installation of the fan 30.

[0038] Further, because in each of the first guide portion 41 and the second guide portion 42, an outlet area of the opening hole is set smaller than an inlet area, the flow speed of the airflow toward the first heat dissipation fins 14 and the second heat dissipation fins 26 is increased.

[0039] Here, the first base member 13 has the inclination portion 13b in the part on the rear side. The inclination portion 13b has the angle setting which directs the airflow reaching there via the first guide portion 41 to the opposite side to the second heat dissipation fins 26. Thus, the airflow guided to the first heat dissipation fins 14 via the first guide portion 41 reaches the first base member 13 and thereafter smoothly flows in an opposite direction to the second heat dissipation fins 26.

[0040] On the other hand, the third base member 25 is inclined with respect to the surface 13a, of the first base member 13, on the mounting side of the first light source 11. This inclination is in such a direction that compared to the surface 13a, the far side, in the third base member 25, from the fan 30 is positioned farther from the fan 30. Thus, the airflow guided to the second heat dissipation fins 26 by the second guide portion 42 is rebounded by the third base member 25, but its rebounding amount becomes small. As a result, by the airflow rebounded by a close side of the third base member 25, the vehicle lamp 1 reduces a possibility that the airflow from the fan 30 is not delivered to a deep side of the third base member 25.

[0041] As described above, in the vehicle lamp 1 according to the present embodiment, the second unit 20 includes the third base member 25 which extends from the second base member 24 in the extending direction of the first base member 13. Thus, in the vehicle lamp 1, the respective heat dissipation fins 14 and 26 are provided on the first base member 13 and the third base member 26, and both of the heat dissipation fins 14 and 26 can thereby be extended in similar directions. Accordingly, in the vehicle lamp 1, constraints on the installation position of the fan 30 due to the difference between the extending directions of both of the heat dissipation fins can be eased, and flexibility of installation of the fan 30 can be enhanced.

[0042] Further, because the third base member 25 is provided in the normal direction of the second base member 24 from the second light source 21, heat produced by the second light source 21 is speedily transmitted to the third base member 25 through the second base member 24 and is dissipated. Consequently, the vehicle lamp 1 can contribute to enhancement of heat dissipation.

[0043] Further, because the first heat dissipation fin 14 and the second heat dissipation fin 26 are continuous and integrated, the heat dissipation path itself by the first heat dissipation fin 14 is continuous with the heat dissipation path of the second heat dissipation fin 26. Accordingly, the vehicle lamp 1 can suppress retention of heat due to discontinuity between each other of the heat dissipation paths.

[0044] Further, because the second light source 21 is positioned in the rear of the first light source 11, the third base member 25 is also positioned in the rear of the first light source 11. Accordingly, the vehicle lamp 1 has the space in front of the third base member 25. Thus, in the vehicle lamp 1, for example, the third heat dissipation fins 27 can further be provided in front of the third base member 25.

[0045] Further, the vehicle lamp 1 includes the bracket 40 between the fan 30 and both of the heat dissipation fins 14 and 26, and the bracket 40 has the guide portions 41 and 42 for respectively guiding the airflow of the fan 30 to the heat dissipation fins 14 and 26. Thus, the vehicle lamp 1 can distribute the airflow from the fan 30 respectively to the heat dissipation fins 14 and 26 by the guide portions 41 and 42, is less subjected to restrictions on the installation position of the fan 30, and can enhance flexibility of installation of the fan 30.

[0046] Further, the third base member 25 is inclined with respect to the first base member 13, and the inclination direction is set to the direction in which the far side from the fan 30 is positioned further away from the fan 30. Thus, the vehicle lamp 1 can decrease an air amount of the airflow from the fan 30 which contacts the third base member 25 and rebounds rearward. Accordingly, a possibility can be suppressed that the airflow from the fan 30 is not delivered to the deep side of the third base member 25 because of the airflow being blown to and rebounded by the close side of the third base member 25. Consequently, the vehicle lamp 1 can contribute to an improvement in heat dissipation performance.

[0047] Further, the vehicle lamp 1 has the inclination portion 13b that guides the airflow, which has reached the first heat dissipation fins 14, to be directed to the opposite side to the second heat dissipation fins 26 side and can thus reduce a possibility that the airflow is directed to the second heat dissipation fins 26 side and is retained.

[0048] Further, because the area of the opening hole outlet is set smaller than the area of the opening hole inlet for each of the first guide portion 41 and the second guide portion 42, the bracket 40 increases the flow speed of the airflow and can contribute to enhancement of heat dissipation.

[0049] In the foregoing, the present invention is described based on the embodiment; however, the present invention is not limited to the above embodiment, changes may be applied, and publicly known and well-known techniques may be combined, without departing from the scope of the gist of the present invention.

[0050] For example, in the present embodiment, the third base member 25 is provided vertically to the second base member 24 but is not particularly limited to vertical arrangement, and is not limited to vertical arrangement as long as the third base member 25 is provided in the extending direction of the first base member 13.

[0051] Further, the third base member 25 is provided in the position directly below the second light source 21 but is not particularly limited to this position and may slightly be deviated.

[0052] Further, as illustrated in Figure 5, the first heat dissipation fin 14 and the second heat dissipation fin 26 are integrated to form the same plane but are not particularly limited to the same plane. For example, in a case where the first heat dissipation fin 14 and the second heat dissipation fin 26 are integrated in a state where the first heat dissipation fin 14 extends in the lateral direction and the second heat dissipation fin 26 is slightly inclined with respect to the lateral direction, both of those may not form the same plane.

[0053] Further, the fan 30 is provided in the rear of the first heat dissipation fins 14 but is not particularly limited to this. For example, the fan 30 may be provided in another position such as the rear of the second heat dissipation fins 26 and may blow air to the respective heat dissipation fins 14 and 26 by using the guide portions 41 and 42 of the bracket 40. Note that in the vehicle lamp 1 according to the present embodiment, due to a condition where the second light source 21 is provided in the rear of the first light source 11, a space is present in the rear of the first light source 11 (that is, in the rear of the first heat dissipation fins 14). Thus, it can be considered that the fan 30 is preferably provided in the rear of the first heat dissipation fins 14.

[0054] Further, the vehicle lamp 1 according to the present embodiment is described by raising a headlight as an example but is not particularly limited to a headlight.[Reference Signs List]

[0055] 1vehicle lamp 10first unit 11first light source 13first base member 13asurface 13binclination portion 14first heat dissipation fin 20second unit 21second light source 24second base member 25third base member 26second heat dissipation fin 27third heat dissipation fin 30fan (air blowing means) 40bracket 41first guide portion (guide portion) 42second guide portion (guide portion)

Examples

Embodiment Construction

[0009]A vehicle lamp according to an embodiment of the present disclosure will hereinafter be described. The present invention is not limited to the embodiment and can appropriately be changed without departing from the scope of the gist of the present invention. Further, in the embodiment, there are sections in which illustrations and descriptions about a part of configurations are skipped, but it goes without saying that about details of techniques which are skipped, publicly known or well-known techniques are appropriately applied within the scope in which no contradiction occurs with the contents described hereinafter.

[0010]Figure 1 is a front view illustrating a vehicle lamp according to the present embodiment, and Figure 2 is a front perspective view illustrating a part of a configuration in Figure 1. Note that for convenience of easy understanding of an illustration, Figure 1 does not illustrate configurations such as an outer lens and a frame which are provided in front of t...

[Technical Field]

[0001] The present invention relates to a vehicle lamp.[Background Art]

[0002] In related art, a vehicle lamp has been suggested that includes a first light source unit which has a first light source emitting light forward direction and a second light source unit which has a second light source emitting light upward such that light is emitted forward through a reflector (for example, see Patent Literature 1). In this vehicle lamp, the first light source unit and the second light source unit are adjacently arranged in a lateral direction. In the vehicle lamp, the first light source unit is of a direct emission type which emits light from the first light source directly forward, has the first light source mounted on a front surface of a base portion, and includes a heat dissipation fin which extends rearward from a rear surface of the base portion. Further, the second light source unit is of a projector type which reflects light from the second light source in a front direction by the reflector, has the second light source mounted on an upper surface of a base portion, and includes a heat dissipation fin which extends downward from a lower surface of the base portion.[Citation List][Patent Literature]

[0003] [Patent Literature 1] Japanese Patent No. 6736978[Summary of Invention][Technical Problem]

[0004] Here, in a vehicle lamp disclosed in Patent Literature 1, a heat dissipation fin protrudes rearward from a base portion in a first light source unit, and a heat dissipation fin protrudes downward from a base portion in a second light source unit. Thus, in a case where air blowing means for facilitating heat dissipation is installed, the air blowing means can be installed only in a position where an airflow becomes appropriate for both of the heat dissipation fin protruding rearward and the heat dissipation fin protruding downward, and flexibility about installation of the air blowing means has not been very high.

[0005] The present invention has been made to solve such a problem in related art, and an object thereof is to provide a vehicle lamp that is capable of enhancing flexibility of installation of air blowing means.[Solution to Problem]

[0006] A vehicle lamp according to the present disclosure is a vehicle lamp including: a first unit that includes a first light source emitting light in a first direction, a first base member as a plate material for mounting the first light source, and a first heat dissipation fin; and a second unit that includes a second light source emitting light in a second direction intersecting with the first direction, a second base member as a plate material for mounting the second light source, and a second heat dissipation fin, the first unit and the second unit being arranged to be aligned, in which the second unit further includes a third base member as a plate material which is connected to the second base member and extends in an extending direction of the first base member, the first heat dissipation fin extends from the first base member to an opposite side to the first direction, and the second heat dissipation fin extends from the third base member in an extending direction of the first heat dissipation fin.[Advantageous Effect of Invention]

[0007] The present disclosure can provide a vehicle lamp that is capable of enhancing flexibility of installation of air blowing means.[Brief Description of Drawings]

[0008] [Figure 1] Figure 1 is a front view illustrating a vehicle lamp according to the present embodiment. [Figure 2] Figure 2 is a front perspective view illustrating a part of a configuration in Figure 1. [Figure 3] Figure 3 is a front perspective view illustrating a part of a configuration in Figure 2. [Figure 4] Figure 4 is a rear perspective view illustrating a part of the configuration in Figure 2. [Figure 5] Figure 5 is a cross-sectional view along IV-IV in Figure 2. [Figure 6] Figure 6 is a perspective view illustrating a fan and a bracket which are illustrated in Figure 2. [Figure 7] Figure 7 is a cross-sectional view along VI-VI in Figure 2. [Description of Embodiment]

[0009] A vehicle lamp according to an embodiment of the present disclosure will hereinafter be described. The present invention is not limited to the embodiment and can appropriately be changed without departing from the scope of the gist of the present invention. Further, in the embodiment, there are sections in which illustrations and descriptions about a part of configurations are skipped, but it goes without saying that about details of techniques which are skipped, publicly known or well-known techniques are appropriately applied within the scope in which no contradiction occurs with the contents described hereinafter.

[0010] Figure 1 is a front view illustrating a vehicle lamp according to the present embodiment, and Figure 2 is a front perspective view illustrating a part of a configuration in Figure 1. Note that for convenience of easy understanding of an illustration, Figure 1 does not illustrate configurations such as an outer lens and a frame which are provided in front of the configuration illustrated in Figure 1.

[0011] A vehicle lamp 1 illustrated in Figure 1 is a headlight to be provided in a right front portion of a vehicle, for example, and includes a first unit 10, a second unit 20, and a projection lens 2 to be provided in front of those. The vehicle lamp 1 has a configuration in which the first unit 10 and the second unit 20 are arranged to be aligned in a lateral direction. The projection lens 2 receives light of a first light source (a reference numeral 11 described later) of the first unit 10 and light of a second light source (a reference numeral 21 described later) of the second unit 20 and emits the light so as to form a predetermined optical path.

[0012] As illustrated in Figure 2, the first unit 10 is a lighting device unit for forming so-called high beam light distribution and includes a circuit board CB1 on which a first light source 11 is mounted, a lens 12, and a first base member 13. The first light source 11 emits light in a front direction (first direction) of the vehicle. The first light source 11 is mounted on the circuit board CB1 which performs light emission control for the first light source 11. The circuit board CB1 is mounted on the first base member 13. The lens 12 is an optical lens for a high beam, which is provided in front of the first light source 11, and is fixed to the first base member 13 by screw members or the like via the circuit board CB1. The first base member 13 is a plate material formed of metal for mounting the first light source 11. The first base member 13 is provided such that a normal direction of the plate material is set to the front direction.

[0013] In such a first unit 10, the normal direction of the first base member 13 is set to the front direction, and the first light source 11 is mounted on the first base member 13 via the circuit board CB1. Thus, the first unit 10 is configured as a lighting device of a direct emission type which emits light from the first light source 11 in the front direction of the vehicle via the lens 12.

[0014] The second unit 20 is a lighting device unit for forming so-called low beam light distribution and includes a circuit board CB2 on which a second light source 21 is mounted, a reflector 22, a shade 23, and a second base member 24. The second light source 21 emits light in an upper direction (a second direction intersecting with the first direction) of the vehicle. The second light source 21 is mounted on the circuit board CB2 which performs light emission control for the second light source 21. The circuit board CB2 is mounted on the second base member 24. The reflector 22 has a reflection surface based on a rotary elliptical surface on an inner side surface and is arranged such that the reflector 22 covers an upper area of the second light source 21 and an open side of the rotary elliptical surface is directed in the front direction of the vehicle. The shade 23 forms a cut-off line for a low beam by a cutting portion 23a that cuts a part of light which is emitted from the second light source 21 and is reflected by the reflector 22. The shade 23 is provided to project upward from a front end portion of the second base member 24. The second base member 24 is a plate material formed of metal for mounting the second light source 21. The second base member 24 is provided such that a normal direction of the plate material is set to the upper direction.

[0015] In such a second unit 20, the normal direction of the second base member 24 is set to the upper direction, and the second light source 21 is mounted on the second base member 24 via the circuit board CB2. Further, the second unit 20 is installed such that the reflector 22 covers the upper area of the second light source 21 and the open side of the rotary elliptical surface is provided in the front direction of the vehicle. Thus, the second unit 20 is configured as a lighting device of a projector type which emits light from the second light source 21 in the front direction of the vehicle via the reflector 22.

[0016] Figure 3 is a front perspective view illustrating a part of a configuration in Figure 2, and Figure 4 is a rear perspective view illustrating a part of the configuration in Figure 2. Further, Figure 5 is a cross-sectional view along IV-IV in Figure 2.

[0017] The first base member 13 and the second base member 24, which are illustrated in Figure 3 and Figure 4, are continuous and integrated. Further, as illustrated in Figure 3 to Figure 5, the first unit 10 (see Figure 1) further includes first heat dissipation fins 14.

[0018] The first heat dissipation fins 14 are a plurality of plate materials formed of metal, which are integrally provided with the first base member 13. The first heat dissipation fin 14 is provided to extend rearward (an opposite side to the first direction) from the first base member 13. Note that the first heat dissipation fin 14 is formed to extend in the lateral direction (in detail, in parallel with the second base member 24) in which the first unit 10 and the second unit 20 are aligned but is not particularly limited to this and may have an angle with respect to the lateral direction.

[0019] In addition, as illustrated in Figure 4 and Figure 5, the second unit 20 (see Figure 1) includes a third base member 25 and second heat dissipation fins 26. The third base member 25 is a plate material, which is integrally connected to the second base member 24 and extends from the second base member 24 in an extending direction (up-down direction) of the first base member 13. Note that the third base member 25 is not limited to a case where it extends in parallel with the extending direction of the first base member 13 and may have a certain angle (for example, within approximately 20°) with respect to the parallel direction.

[0020] The second heat dissipation fins 26 are a plurality of plate materials formed of metal, which are integrally provided with the third base member 25. The second heat dissipation fin 26 is formed to extend from the third base member 25 in a rear direction which is the same direction as the first heat dissipation fin 14. Similarly to the first heat dissipation fin 14, the second heat dissipation fin 26 is also formed to extend in the lateral direction (in detail, in parallel with the second base member 24) in which the first unit 10 and the second unit 20 are aligned. However, the second heat dissipation fin 26 is not limited to this and may have an angle with respect to the lateral direction.

[0021] As described above, the vehicle lamp 1 according to the present embodiment has the units 10 and 20 of the direct emission type and the projector type, and the first light source 11 and the second light source 21 emit light in respectively different directions. Thus, as for the first base member 13 and the second base member 24 on which the light sources 11 and 21 are mounted, their normal directions are different. Thus, in a lighting device in which heat dissipation fins are formed simply on the base members 13 and 24, an extending direction of each of the heat dissipation fins becomes different. However, because the vehicle lamp 1 (see Figure 1) according to the present embodiment includes the third base member 25 which extends from the second base member 24 of the second unit 20 in the same direction as the extending direction of the first base member 13, the second heat dissipation fin 26 can be extended from the third base member 25. As a result, in the vehicle lamp 1, the first heat dissipation fin 14 extending from the first base member 13 and the second heat dissipation fin 26 extending from the third base member 25 can be set in the same direction.

[0022] Here, as illustrated in Figure 5, the third base member 25 is provided in the normal direction of the second base member 24 from the second light source 21. Thereby, the third base member 25 is provided directly below the second light source 21, for example. Accordingly, the vehicle lamp 1 can suppress lowering of heat dissipation by presence of the third base member 25 which is interposed between the second base member 24 and the second heat dissipation fins 26. Note that in an example illustrated in Figure 5, the whole third base member 25 is provided to agree with a normal direction of the second light source 21, but this is not restrictive, and a connection portion C between the second base member 24 and the third base member 25 may be provided in a position in the normal direction of the second light source 21.

[0023] In addition, as illustrated in Figure 4, it is preferable that pluralities of (at least one or more) first heat dissipation fins 14 and second heat dissipation fins 26 be continuous and integrated. Accordingly, a heat dissipation path provided between each other of the fins 14 and 26 becomes continuous, for example. Here, when the heat dissipation path between the first heat dissipation fin 14 and the second heat dissipation fin 26 is discontinuous, this can allow easy occurrence of retention of heat in a discontinuous portion and can become a cause of lowering of the heat dissipation. However, in the vehicle lamp 1 according to the present embodiment, because at least one or more first heat dissipation fins 14 and second heat dissipation fins 26 are continuous and integrated, at least one heat dissipation path becomes continuous. Thus, the vehicle lamp 1 includes a fin structure which contributes to reduction in a possibility of retention of heat.

[0024] In addition, as illustrated in Figure 3 and Figure 5, the second unit 20 includes a plurality of third heat dissipation fins 27 as plate materials formed of metal, which are integrally provided with the third base member 25. Here, the third heat dissipation fin 27 is provided to extend not in the rear direction but in the front direction of the third base member 25. As illustrated in Figure 3, in the present embodiment, the second light source 21 is positioned in the rear of the first light source 11. Further, as illustrated in Figure 5, the third base member 25 is provided directly below, for example, the second light source 21. Because of such a configuration, the third base member 25 is also positioned slightly in the rear, and a space is present in front of the third base member 25. By using this space, the third heat dissipation fin 27 is provided to extend in the front direction of the third base member 25. Note that in the present embodiment, the third heat dissipation fins 27 are formed such that a heat dissipation path is provided in the up-down direction. That is, the heat dissipation path of the third heat dissipation fins 27 intersects with (is orthogonal to) the heat dissipation path of the second heat dissipation fins 26.

[0025] Figure 2 is again referred to. The vehicle lamp 1 according to the present embodiment further includes a fan (air blowing means) 30 and a bracket 40. Figure 6 is a perspective view illustrating the fan 30 and the bracket 40 which are illustrated in Figure 2, and Figure 7 is a cross-sectional view along VI-VI in Figure 2. Note that a cross section along VI-VI is a cross section which is parallel with the first heat dissipation fins 14 and the second heat dissipation fins 26.

[0026] The fan 30 illustrated in Figure 6 and Figure 7 blows air to the first heat dissipation fins 14 (first base member 13) and the second heat dissipation fins 26 (third base member 25). The fan 30 is provided in a position in the rear of the first heat dissipation fins 14 and blows air forward.

[0027] The bracket 40 is interposed between the fan 30 and the first heat dissipation fins 14 and second heat dissipation fins 26. The bracket 40 includes a first guide portion (guide portion) 41, which guides an airflow from the fan 30 to the first heat dissipation fins 14, and a second guide portion (guide portion) 42, which guides the airflow from the fan 30 to the second heat dissipation fins 26, and guides the airflow to each of the heat dissipation fins 14 and 26.

[0028] As illustrated in Figure 6 and Figure 7, the first guide portion 41 is configured with an opening hole portion, which is positioned on one side of the fan 30, in the bracket 40. The first guide portion 41 is an opening hole portion having a generally semicircular shape. The first guide portion 41 has a one-side surface 41a and an other-side surface 41b which face an opening hole. In the one-side surface 41a, a distal end positioned in the front direction is inclined to another side. On the other hand, in the other-side surface 41b as well, a distal end positioned in the front direction is slightly inclined to the other side, but its inclination angle is smaller than that of the one-side surface 41a. Because of such a configuration, in the first guide portion 41, an opening hole area of an outlet is set smaller than an opening hole area of an inlet. Furthermore, an opening hole inlet and an opening hole outlet are generally parallel (for example, a difference between plane angles of both of those is within 20°). Thus, the airflow from the fan 30 is supplied to the first heat dissipation fins 14 in a state where a flow speed is increased by the first guide portion 41.

[0029] The second guide portion 42 is configured with an opening hole portion, which is positioned on the other side of the fan 30, in the bracket 40. In the second guide portion 42, an inlet side of the opening hole portion has a generally semicircular shape, and an outlet side of the opening hole portion has a rectangular shape. The second guide portion 42 has a one-side surface 42a which faces an opening hole. A front side of the one-side surface 42a is largely inclined to the other side. Thus, the airflow from the fan 30 is supplied to the second heat dissipation fins 26 by the second guide portion 42. Note that the second guide portion 42 has a flat plate 43 opposed to the one-side surface 42a. Here, in the second guide portion 42 as well, an area of an opening hole outlet is set smaller than an area of an opening hole inlet. Thus, the airflow from the fan 30 is supplied to the second heat dissipation fins 26 while the flow speed is also increased by the second guide portion 42. Note that because the opening hole inlet and the opening hole outlet of the first guide portion 41 are generally parallel, the flow speed is more easily increased. On the other hand, because the opening hole inlet and the opening hole outlet of the second guide portion 42 are not generally parallel, there is a possibility that an effect of increasing the flow speed becomes low compared to the first guide portion 41. However, this does not change the fact that the second guide portion 42 exhibits the effect of increasing the flow speed.

[0030] Here, as illustrated in the cross-sectional view in Figure 7, the third base member 25 has a structure which is inclined with respect to a surface 13a, in the first base member 13, on a mounting side of the first light source 11. An inclination direction is a direction along an air blowing direction to the second heat dissipation fins 26. That is, compared to the surface 13a, the third base member 25 has an inclination that is inclined in a direction in which a far side from the fan 30 is positioned further away from the fan 30.

[0031] In addition, as illustrated in the cross-sectional view in Figure 7, the first base member 13 includes an inclination portion 13b on the second base member 24 side (other side). The inclination portion 13b guides the airflow such that the airflow directed from the fan 30 to the first heat dissipation fins 14 reaches the first heat dissipation fins 14 and the airflow which has reached there is directed opposite to the second heat dissipation fins 26 side. The inclination portion 13b is formed by making thick a part of the first base member 13 on a rear side.

[0032] A description will be made more in detail. First, the one-side surface 41a of the first guide portion 41 produces an airflow A1 which flows in parallel with the one-side surface 41a. In the vehicle lamp 1, an angle formed between the airflow A1 and the inclination portion 13b (an angle formed on the one side) is equal to or greater than 90°. In addition, the other-side surface 41b of the first guide portion 41 produces an airflow A2 which flows in parallel with the other-side surface 41b. In the vehicle lamp 1, an angle formed between the airflow A2 and the inclination portion 13b (an angle formed on the one side) is equal to or greater than 90°. Thus, the airflow guided by the first guide portion 41 rebounds to the one side (an opposite side to the second heat dissipation fins 26) due to such an angle setting of the inclination portion 13b. As a result, the vehicle lamp 1 can reduce a possibility that the airflow flows to the second heat dissipation fins 26 side and is retained.

[0033] Next, a description will be made about an action of the vehicle lamp 1 according to the present embodiment. First, in the vehicle lamp 1, the third base member 25 is provided for the second base member 24, and the third base member 25 is provided in the extending direction of the first base member 13. Thus, in the vehicle lamp 1, the first heat dissipation fin 14 provided on the first base member 13 and the second heat dissipation fin 26 provided on the third base member 25 can be provided to extend in the same direction. Accordingly, the vehicle lamp 1 can be less subjected to constraints on an installation position of the fan 30 due to a difference between the extending directions of the heat dissipation fins.

[0034] In particular, in the vehicle lamp 1, because both of the heat dissipation fins 14 and 26 can be extended in the same direction, at least one of both of the heat dissipation fins 14 and 26 can integrally be formed to be continuous, and it also becomes possible to make the heat dissipation path become continuous.

[0035] Further, the third base member 25 is provided in the normal direction of the second base member 24 from a position of the second light source 21, that is, directly below the second light source 21. Thus, in the vehicle lamp 1, heat of the second light source 21 can quickly be transmitted to the third base member 25 and can thereby be dissipated from the second heat dissipation fins 26.

[0036] In addition, because the second light source 21 is provided in the rear of the first light source 11, the third base member 25 provided directly below the second light source 21 is also positioned slightly in the rear. Thus, in the vehicle lamp 1, the third heat dissipation fins 27 can be provided in front of the third base member 25.

[0037] In addition, the vehicle lamp 1 includes the bracket 40 which has the first guide portion 41 and the second guide portion 42 between the fan 30 and the first heat dissipation fins 14 and second heat dissipation fins 26. Thus, the vehicle lamp 1 can guide the airflow from the fan 30 by the first guide portion 41 and the second guide portion 42, is less subjected to restrictions on the installation position of the fan 30, and can improve flexibility of installation of the fan 30.

[0038] Further, because in each of the first guide portion 41 and the second guide portion 42, an outlet area of the opening hole is set smaller than an inlet area, the flow speed of the airflow toward the first heat dissipation fins 14 and the second heat dissipation fins 26 is increased.

[0039] Here, the first base member 13 has the inclination portion 13b in the part on the rear side. The inclination portion 13b has the angle setting which directs the airflow reaching there via the first guide portion 41 to the opposite side to the second heat dissipation fins 26. Thus, the airflow guided to the first heat dissipation fins 14 via the first guide portion 41 reaches the first base member 13 and thereafter smoothly flows in an opposite direction to the second heat dissipation fins 26.

[0040] On the other hand, the third base member 25 is inclined with respect to the surface 13a, of the first base member 13, on the mounting side of the first light source 11. This inclination is in such a direction that compared to the surface 13a, the far side, in the third base member 25, from the fan 30 is positioned farther from the fan 30. Thus, the airflow guided to the second heat dissipation fins 26 by the second guide portion 42 is rebounded by the third base member 25, but its rebounding amount becomes small. As a result, by the airflow rebounded by a close side of the third base member 25, the vehicle lamp 1 reduces a possibility that the airflow from the fan 30 is not delivered to a deep side of the third base member 25.

[0041] As described above, in the vehicle lamp 1 according to the present embodiment, the second unit 20 includes the third base member 25 which extends from the second base member 24 in the extending direction of the first base member 13. Thus, in the vehicle lamp 1, the respective heat dissipation fins 14 and 26 are provided on the first base member 13 and the third base member 26, and both of the heat dissipation fins 14 and 26 can thereby be extended in similar directions. Accordingly, in the vehicle lamp 1, constraints on the installation position of the fan 30 due to the difference between the extending directions of both of the heat dissipation fins can be eased, and flexibility of installation of the fan 30 can be enhanced.

[0042] Further, because the third base member 25 is provided in the normal direction of the second base member 24 from the second light source 21, heat produced by the second light source 21 is speedily transmitted to the third base member 25 through the second base member 24 and is dissipated. Consequently, the vehicle lamp 1 can contribute to enhancement of heat dissipation.

[0043] Further, because the first heat dissipation fin 14 and the second heat dissipation fin 26 are continuous and integrated, the heat dissipation path itself by the first heat dissipation fin 14 is continuous with the heat dissipation path of the second heat dissipation fin 26. Accordingly, the vehicle lamp 1 can suppress retention of heat due to discontinuity between each other of the heat dissipation paths.

[0044] Further, because the second light source 21 is positioned in the rear of the first light source 11, the third base member 25 is also positioned in the rear of the first light source 11. Accordingly, the vehicle lamp 1 has the space in front of the third base member 25. Thus, in the vehicle lamp 1, for example, the third heat dissipation fins 27 can further be provided in front of the third base member 25.

[0045] Further, the vehicle lamp 1 includes the bracket 40 between the fan 30 and both of the heat dissipation fins 14 and 26, and the bracket 40 has the guide portions 41 and 42 for respectively guiding the airflow of the fan 30 to the heat dissipation fins 14 and 26. Thus, the vehicle lamp 1 can distribute the airflow from the fan 30 respectively to the heat dissipation fins 14 and 26 by the guide portions 41 and 42, is less subjected to restrictions on the installation position of the fan 30, and can enhance flexibility of installation of the fan 30.

[0046] Further, the third base member 25 is inclined with respect to the first base member 13, and the inclination direction is set to the direction in which the far side from the fan 30 is positioned further away from the fan 30. Thus, the vehicle lamp 1 can decrease an air amount of the airflow from the fan 30 which contacts the third base member 25 and rebounds rearward. Accordingly, a possibility can be suppressed that the airflow from the fan 30 is not delivered to the deep side of the third base member 25 because of the airflow being blown to and rebounded by the close side of the third base member 25. Consequently, the vehicle lamp 1 can contribute to an improvement in heat dissipation performance.

[0047] Further, the vehicle lamp 1 has the inclination portion 13b that guides the airflow, which has reached the first heat dissipation fins 14, to be directed to the opposite side to the second heat dissipation fins 26 side and can thus reduce a possibility that the airflow is directed to the second heat dissipation fins 26 side and is retained.

[0048] Further, because the area of the opening hole outlet is set smaller than the area of the opening hole inlet for each of the first guide portion 41 and the second guide portion 42, the bracket 40 increases the flow speed of the airflow and can contribute to enhancement of heat dissipation.

[0049] In the foregoing, the present invention is described based on the embodiment; however, the present invention is not limited to the above embodiment, changes may be applied, and publicly known and well-known techniques may be combined, without departing from the scope of the gist of the present invention.

[0050] For example, in the present embodiment, the third base member 25 is provided vertically to the second base member 24 but is not particularly limited to vertical arrangement, and is not limited to vertical arrangement as long as the third base member 25 is provided in the extending direction of the first base member 13.

[0051] Further, the third base member 25 is provided in the position directly below the second light source 21 but is not particularly limited to this position and may slightly be deviated.

[0052] Further, as illustrated in Figure 5, the first heat dissipation fin 14 and the second heat dissipation fin 26 are integrated to form the same plane but are not particularly limited to the same plane. For example, in a case where the first heat dissipation fin 14 and the second heat dissipation fin 26 are integrated in a state where the first heat dissipation fin 14 extends in the lateral direction and the second heat dissipation fin 26 is slightly inclined with respect to the lateral direction, both of those may not form the same plane.

[0053] Further, the fan 30 is provided in the rear of the first heat dissipation fins 14 but is not particularly limited to this. For example, the fan 30 may be provided in another position such as the rear of the second heat dissipation fins 26 and may blow air to the respective heat dissipation fins 14 and 26 by using the guide portions 41 and 42 of the bracket 40. Note that in the vehicle lamp 1 according to the present embodiment, due to a condition where the second light source 21 is provided in the rear of the first light source 11, a space is present in the rear of the first light source 11 (that is, in the rear of the first heat dissipation fins 14). Thus, it can be considered that the fan 30 is preferably provided in the rear of the first heat dissipation fins 14.

[0054] Further, the vehicle lamp 1 according to the present embodiment is described by raising a headlight as an example but is not particularly limited to a headlight.[Reference Signs List]

[0055] 1vehicle lamp 10first unit 11first light source 13first base member 13asurface 13binclination portion 14first heat dissipation fin 20second unit 21second light source 24second base member 25third base member 26second heat dissipation fin 27third heat dissipation fin 30fan (air blowing means) 40bracket 41first guide portion (guide portion) 42second guide portion (guide portion)

Examples

Embodiment Construction

[0009]A vehicle lamp according to an embodiment of the present disclosure will hereinafter be described. The present invention is not limited to the embodiment and can appropriately be changed without departing from the scope of the gist of the present invention. Further, in the embodiment, there are sections in which illustrations and descriptions about a part of configurations are skipped, but it goes without saying that about details of techniques which are skipped, publicly known or well-known techniques are appropriately applied within the scope in which no contradiction occurs with the contents described hereinafter.

[0010]Figure 1 is a front view illustrating a vehicle lamp according to the present embodiment, and Figure 2 is a front perspective view illustrating a part of a configuration in Figure 1. Note that for convenience of easy understanding of an illustration, Figure 1 does not illustrate configurations such as an outer lens and a frame which are provided in front of t...

Claims

1. A vehicle lamp comprising: a first unit that includes a first light source emitting light in a first direction, a first base member as a plate material for mounting the first light source, and a first heat dissipation fin; and a second unit that includes a second light source emitting light in a second direction intersecting with the first direction, a second base member as a plate material for mounting the second light source, and a second heat dissipation fin, the first unit and the second unit being arranged to be aligned, wherein the second unit further includes a third base member as a plate material which is connected to the second base member and extends in an extending direction of the first base member, the first heat dissipation fin extends from the first base member to an opposite side to the first direction, and the second heat dissipation fin extends from the third base member in an extending direction of the first heat dissipation fin.

2. The vehicle lamp according to claim 1, wherein the third base member is provided in a normal direction of the second base member from the second light source.

3. The vehicle lamp according to claim 1, wherein the first heat dissipation fin and the second heat dissipation fin are continuous and integrated.

4. The vehicle lamp according to claim 2, wherein the second light source is positioned on the opposite side to the first direction relative to the first light source.

5. The vehicle lamp according to claim 1, further comprising: air blowing means that blows air to the first heat dissipation fin and the second heat dissipation fin; and a bracket that is interposed between the first heat dissipation fin and the second heat dissipation fin and the air blowing means, wherein the bracket includes a guide portion which guides an airflow from the air blowing means to each of the first heat dissipation fin and the second heat dissipation fin.

6. The vehicle lamp according to claim 5, wherein the air blowing means is provided in a position on the opposite side to the first direction with respect to the first heat dissipation fin and blows air in the first direction, the guide portion of the bracket includes a portion which guides the airflow from the air blowing means provided in the position to a side of the second heat dissipation fin, the third base member is inclined with respect to a surface, of the first base member, on a mounting side of the first light source, and an inclination direction of the third base member is set to a direction in which a far side from the air blowing means is positioned further away from the air blowing means.

7. The vehicle lamp according to claim 5, wherein the first base member has, in a part of the first base member on the opposite side to the first direction, an inclination portion that guides an airflow such that an airflow directed from the air blowing means to the first heat dissipation fin reaches the first heat dissipation fin and the airflow, which already reaches the first heat dissipation fin, is directed to an opposite side to a side of the second heat dissipation fin.

8. The vehicle lamp according to claim 5, wherein in the bracket, an area of an opening hole outlet of the guide portion is set smaller than an area of an opening hole inlet.

Images