JP6442871B2 - Vehicle lighting - Google Patents

Description

  The present invention relates to a vehicular lamp.

  Conventionally, in a vehicular lamp, in the case of a vehicular lamp using a semiconductor type light source, it is necessary to dissipate heat generated from the semiconductor type light source in order to make the best use of the performance of the semiconductor type light source. It is known to change.

  In Patent Document 1, the shape of the flat fin provided on the back surface of the base portion of the heat sink member to which the semiconductor-type light source is attached is inclined with respect to the vertical direction to circulate the air in the housing, and from the light source. A vehicular lamp that efficiently dissipates heat is disclosed.

  However, in patent document 1, it was the vehicle lamp which inclined the flat plate fin in order to circulate the air in the whole inside of a housing | casing. As seen in recent years, in a so-called direct-type lamp unit in which a semiconductor-type light source is disposed facing an optical member such as a projection lens and direct light from the semiconductor-type light source is formed by a projection lens, By saving space in the front-rear direction, the space between the projection lens, the semiconductor light source and the heat sink member is reduced, air is likely to stay, and the semiconductor light source is not sufficiently dissipated. It has become.

JP 2009-266435 A

  The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to solve the problem that a semiconductor-type light source decreases luminous efficiency by heat by improving the heat dissipation efficiency of a vehicular lamp, and a semiconductor-type light source An object of the present invention is to provide a vehicular lamp that suppresses a decrease in luminous efficiency.

The present invention is grasped by the following composition.
(1) The vehicular lamp of the present invention includes a light source, a heat radiating member to which the light source is attached, and an optical member that irradiates direct light from the light source in a predetermined direction, and the heat radiating member A base plate portion erected in a direction, and a light source mounting surface for installing the light source is provided on the base plate portion, and the light source mounting surface is more than the other surface of the base plate portion on the optical member side. Is formed at a position spaced apart from the optical member.

  (2) The vehicular lamp according to the present invention is characterized in that the light source mounting surface extends from a lower end portion to an upper end portion of the base plate portion.

  (3) In the vehicular lamp according to the present invention, the base plate portion of the heat radiating member has an optical member mounting surface outside the light source mounting surface and closer to the optical member than the light source mounting surface. It is formed, The said optical member is attached to the said optical member attachment surface, It is characterized by the above-mentioned.

  (4) The vehicular lamp according to the present invention is characterized in that an opening through which a part of a power supply member for supplying electric power to the light source is inserted is provided in a part of the base plate part.

  (5) In the vehicular lamp of the present invention, the light source is installed such that the light emission optical axis is in the vehicle front direction, the optical member is installed so as to face the light source, and direct light from the light source is provided. It has the incident surface which injects.

  According to the present invention, the optical member and the light source mounting surface of the heat radiating member to which the light source is mounted are separated from the other surface to provide a space, so that the distance between the optical member and the light source is short. Also in the lamp, it is possible to form a flow of air from the lower side to the upper side in the vicinity of the light source, thereby improving the heat radiation efficiency of the heat from the light source and suppressing the decrease in the light emission efficiency of the light source.

It is the perspective view of the decomposition | disassembly state seen from the front side of the lamp unit which shows embodiment of the vehicle lamp which concerns on this invention. FIG. 2 is a perspective view of a state in which a lens and a lens holder in FIG. 1 are removed and a heat dissipation member is cut along line AA. It is a front view which shows the state which removed the lens and lens holder of the lamp unit. It is the state which removed the lens and lens holder in FIG. 1, and was a side view which cut | disconnected the heat radiating member along the AA line.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention (hereinafter referred to as “embodiments”) will be described in detail with reference to the accompanying drawings. In addition, this invention is not limited by this embodiment. In this specification, front, rear, upper, lower, left, and right are front, rear, upper, lower, left, and right when the vehicular lamp according to the present invention is mounted on a vehicle.
<The embodiment will be described below>

(Description of Configuration of Embodiment)
1 to 4 show an embodiment of a vehicular lamp according to the present invention. Hereinafter, the configuration of the vehicular lamp according to this embodiment will be described. In FIG. 1, reference numeral 1 denotes a vehicular lamp (for example, a headlamp or a fog lamp) according to this embodiment. The vehicular lamp 1 is mounted on both left and right ends of the front portion of the vehicle.

(Description of vehicle lamp 1)
The vehicular lamp 1 includes a semiconductor light source 2 as a light source and a lens 3 in a lamp chamber defined by a lamp housing (not shown) and an outer lens (not shown), as shown in FIG. And a lens holder 4 and a heat dissipation member 5. The semiconductor light source 2 is attached to a light source attachment surface 54 provided on the base plate portion 51 of the heat dissipation member 5 by the light source holder 21. The lens 3 and the lens holder 4 are attached to an optical member attachment surface 52 provided on the base plate portion 51 of the heat dissipation member 5.

(Explanation of lamp units 2, 3, 4, 5)
The semiconductor-type light source 2, the lens 3, the lens holder 4, and the heat radiating member 5 constitute a lamp unit, and the optical axis can be adjusted in the vertical and horizontal directions in a lamp chamber (not shown) defined by the lamp housing and the outer lens. Placed in.

(Description of the semiconductor-type light source 2)
As shown in FIG. 1, the semiconductor light source 2 is a self-luminous semiconductor light source such as an LED, OEL, or OLED (organic EL) in this example. The semiconductor type light source 2 includes a light emitting chip (LED chip) having a light emitting surface and a substrate 20. The semiconductor light source 2 is positioned and attached to the light source attachment portion 57 provided on the light source attachment surface 54 of the heat dissipation member 5 via the light source holder 21. The semiconductor light source 2 is arranged so that the light emission optical axis is in the vehicle front direction, and the light emitting surface of the light emitting chip is located near the rear focal point of the lens 3 and is arranged to face the vehicle front. Has been.

  The light source holder 21 is positioned and attached to the light source holder attaching portion 58 provided on the light source attaching surface 54 of the heat radiating member 5 by the screw 23. The light source holder 21 is provided with a holder portion 22 for holding the semiconductor-type light source 2 on the heat radiating member 5 and a power supply member 6 in which a terminal for supplying power to the semiconductor-type light source 2 and a connector for supplying power are formed. ing. The power feeding member 6 may be formed integrally with the light source holder 21 or may be formed as a separate member.

(Description of power supply member)
The power supply member 6 includes a power supply socket 60, a connector portion 61 inserted into the power supply socket 60, and a harness 62 that connects the connector portion 61 and a power source (not shown), and the power supply member 6 and the light source holder 21. Power is supplied to the semiconductor light source 2 via the terminal. As shown in FIGS. 1 and 4, the power supply member 6 is provided at a position that is an end portion of the light source holder 21 and is shifted to the back side of the base plate portion 51. In this embodiment, the semiconductor light source 2 is positioned and attached to the light source attachment surface 54 by the holder portion 22 of the light source holder 21, and the power supply member 6 is located at a position shifted to the rear side in the vehicle longitudinal direction of the light source attachment surface 54. Provided.

(Lens description)
As shown in FIG. 1, the lens 3 includes a lens portion 30 and a flange portion 31. The lens unit 30 includes an incident surface 32 on which outgoing light (direct light) from the semiconductor-type light source 2 is incident, and an output surface 33 that emits light incident on the incident surface 32 in a predetermined direction in front of the vehicle. The shape of the front view 30 is a non-circular shape. The lens 3 is made of a resin member.

  The lens unit 30 includes an incident surface 32 provided so as to face the light source 2 and an emission surface 33 located on the vehicle front side. The incident surface 32 forms a convex curved surface protruding toward the semiconductor-type light source 2, or a concave curved surface recessed toward the opposite side of the semiconductor-type light source 2, or a flat surface. The incident surface 32 includes a free-form surface, a quadratic surface, a composite quadratic surface, a combination surface, or a plane. The emission surface 33 forms a convex curved surface that protrudes on the opposite side to the semiconductor light source 2. The exit surface 33 is composed of a free-form surface, a quadric surface, a composite quadric surface, or a combination thereof, and may be composed of a plurality of surfaces.

  The flange portion 31 is integrally provided on the peripheral portion (entire periphery or part) of the lens portion 30. The back surface of the flange portion 31 is formed of a free curved surface or a flat surface continuous from the incident surface 32. The front surface of the flange portion 31 is a free curved surface or a flat surface that is continuous from the emission surface 33. The front view shape of the edge (end surface, outer surface) of the flange portion 31 is the same shape as the front view shape of the lens portion 30.

  The lens 3 is positioned and held on the lens holder 4 by the flange portion 31. The lens holder 4 is positioned and attached to the optical member attachment surface 52 of the heat dissipation member 5 while holding the flange portion 31.

(Description of lens holder)
The lens holder 4 is made of a resin member having a lower thermal conductivity (a higher thermal resistance) than that of the heat dissipation member 5. As shown in FIG. 1, the lens holder 4 has a cylindrical structure in which a lens portion 30 is disposed at the center. The lens holder 4 includes a holding cylinder portion 41, a holding edge portion 42, and a mounting base portion 43.

  The holding cylinder portion 41 of the lens holder 4 has a cylindrical shape and is formed between a holding edge portion 42 located at an end portion on the vehicle front side and a mounting base portion 43 located at an end portion on the heat dissipation member 5 side. Has been. The front view shape of the holding cylinder portion 41 is a non-circular shape like the front view shape of the lens 3, and the inner peripheral surface of the holding cylinder portion 41 is slightly larger than the outer peripheral surface of the edge of the flange portion 31 of the lens 3. I am doing.

  The holding edge portion 42 of the lens holder 4 has a flange shape, and is integrally provided from one end of the holding cylinder portion 41 (the end portion on the vehicle front side) to the inside of the holding cylinder portion 41. The shape of the inner peripheral surface of the holding edge portion 42 is a non-circular shape as in the front view shape of the lens portion 30 of the lens 3. The inner peripheral surface of the holding edge portion 42 is slightly smaller than the outer peripheral surface of the edge of the flange portion 31 of the lens 3 and is slightly larger than the boundary between the lens portion 30 and the flange portion 31. The holding edge portion 42 positions and holds the flange portion 31 of the lens 3.

  The mounting base portion 43 of the lens holder 4 has a plate shape, and is integrated with the upper outer side and the lower outer side of the holding cylinder portion 41 from the upper and lower ends of the other end of the holding cylinder portion 41 (the end portion on the heat radiation member 5 side). Is provided. The front view shape of the outer shape of the mounting base portion 43 is substantially rectangular. The mounting base portion 43 is provided to face the optical member mounting surface 52 of the heat radiating member 5, and is positioned and mounted on the optical member mounting surface 52. The optical member mounting surface 52 will be described later.

(Description of heat dissipation member)
The heat radiating member 5 has a semiconductor light source 2 and a lens holder 4 attached thereto, and a lens 3 is attached via the lens holder 4. The heat radiating member 5 radiates heat generated by the semiconductor light source 2 to the outside. The heat radiating member 5 is, for example, a heat sink member made of aluminum die casting or resin having thermal conductivity. As shown in FIG. 1, the heat dissipating member 5 includes a base plate portion 51 erected in the vertical direction (vehicle up-down direction) and a plurality of vertical plate-shaped fins integrally provided on one surface (back surface) of the base plate portion 51. Part 56.

  On the other surface (front surface) of the base plate portion 51 of the heat radiating member 5, a light source mounting surface 54 and an optical member mounting surface 52 are provided via a stepped portion 55. The light source mounting surface 54 is located on the center side of the base plate portion 51 in a front view from the front side of the vehicle, and a light source mounting portion 57 is formed at the center portion. The optical member mounting surface 52 is provided outside the light source mounting surface 54.

  The light source mounting surface 54 is provided at a position farther from the lens 3 than the optical member mounting surface 52 through the step portion 55. The light source mounting surface 54 extends in the vertical direction of the semiconductor-type light source 2 from the lower end portion 51 b to the upper end portion 51 a of the base plate portion 51 and extends in the left-right direction of the semiconductor-type light source 2. The light source attachment part 57 is provided in the center part. The light source attachment surface 54 is a surface on which the semiconductor light source 2 is attached to the light source attachment portion 57 via the light source holder 21. The light source mounting surface 54 does not necessarily have a cross shape. For example, it is good also as a shape provided in the center side of the baseplate part 51 via the level | step-difference part 55 of an up-down direction.

  The light source mounting surface 54 includes a housing portion 7 in which a part of the power supply member 6 is arranged in accordance with the shape of the power supply member 6 of the light source holder 21. The accommodating portion 7 has a concave shape on one surface (back surface) side of the base plate portion 51, and a space in which a part of the power feeding member 6 is disposed is formed. In that case, the opening part 59 is provided over a part of the accommodating part 7 and a part of the light source attachment surface 54.

  The accommodating portion 7 is provided on either the left or right side of the light source mounting surface 54. In the present embodiment, it is formed on the right side of the light source mounting surface 54 formed in a cross shape and larger than the connector portion 61 of the power supply member 6 of the light source holder 21. When the light source holder 21 is installed on the base plate portion 51, the power supply member 6 is stored in the storage portion 7. Further, in a state where the light source holder 21 is attached, a harness 62 that supplies power to the semiconductor light source 2 via the power supply member 6 and the light source holder 21 is inserted through the opening 59 and attached to the connector portion 61.

  The housing portion 7 is not limited to the concave shape provided on the light source mounting surface 54, and may have a shape including an opening 59 in which a position corresponding to the power supply member 6 of the light source mounting surface 54 is cut out. In this case, the opening 59 also serves as an opening through which the housing portion 7 of the power supply member 6 and a harness 62 that supplies power to the semiconductor light source 2 through the power supply member 6 and the light source holder 21 are inserted.

  On the other surface (front surface) of the base plate portion 51 of the heat radiating member 5, an optical member mounting surface 52 is provided outside the light source mounting surface 54 in a front view. The optical member mounting surface 52 is located outside (on the left and right sides) of the light source mounting surface 54, and the surface is set at a position closer to the lens 3 than the light source mounting surface 54 via the stepped portion 55. An attachment base portion 43 of the lens holder 4 is positioned and attached to the optical member attachment surface 52 while holding the lens 3.

  The step portion 55 is provided between the light source mounting surface 54 and the optical member mounting surface 52, and a surface connecting the light source mounting surface 54 and the optical member mounting surface 52 is formed. An opening 59 through which a part of the power supply member 6 of the light source holder 21 can be inserted may be provided in a part of the step part 55.

  The lens holder 4 is fixed to the optical member attachment surface 52 of the base plate portion 51 by an attachment structure (not shown) provided on the attachment base portion 43 of the lens holder 4. Since the lens holder 4 holds the lens 3, the lens holder 4 and the lens 3 are integrally attached and fixed to the optical member attachment surface 52. The optical member mounting surface 52 is provided on the other surface (front) side of the base plate portion 51 and at least at the corners. The mounting structure of the lens holder 4 is based on a hook structure or a mounting structure using screws.

(Description of the operation of the embodiment)
The vehicular lamp 1 according to this embodiment is configured as described above, and the operation thereof will be described below.

  First, the light emitting chip of the semiconductor light source 2 is turned on. Then, most of the light emitted from the light emitting chip directly enters the lens unit 30 from the incident surface 32 of the lens unit 30 of the lens 3. At this time, the light distribution of the incident light is controlled on the incident surface 32. Incident light that enters the lens unit 30 exits from the exit surface 33 of the lens unit 30. At this time, the emitted light is controlled on the emission surface 33, and the light emitted from the semiconductor light source 2 is light distribution controlled on the incident surface 32 and the emission surface 33. The emitted light is irradiated in front of the vehicle as a predetermined light distribution pattern (for example, a low beam distribution pattern, a high beam distribution pattern).

  The heat generated in the light emitting chip of the semiconductor light source 2 is radiated to the outside through the heat radiating member 5. At this time, since the light source mounting surface 54 of the base plate portion 51 is provided at least in the vertical cross section passing through the light source, the air in the lamp is formed between the lens 3 and the semiconductor-type light source 2. The created gap is convected from below to above.

(Explanation of effect of embodiment)
The vehicular lamp 1 according to this embodiment is configured and operated as described above, and the effects thereof will be described below.

  The vehicular lamp 1 according to this embodiment is a semiconductor that is a heat source by forming the lens 3 and the light source mounting surface 54 of the base plate portion 51 so as to be separated from the other surface even in a so-called direct-light type lamp unit. Since the distance between the mold light source 2 and the optical member 3 can be increased, even in the lamp unit in which the semiconductor light source 2 and the base plate portion 51 are provided close to each other, the optical member 3 and the base plate generated from the semiconductor light source 2 It can be made to function as a flow path for convection of air staying in the vicinity of the semiconductor-type light source 2 of the part 51. Therefore, the semiconductor light source 2 can be radiated efficiently. Thereby, the fall of the luminous efficiency of the semiconductor type light source 2 by a heat | fever can be suppressed.

  In addition, by providing an opening through which a part of the power supply member that supplies power to the semiconductor-type light source 2 is provided in a part of the base plate part, the power supply member 6, the harness 62, etc. Therefore, it is possible to avoid placing extra parts such as the harness 62 between the lens 3 and the semiconductor-type light source 2, and to secure a gap between the lens 3 and the semiconductor-type light source 2. For this reason, it is possible to secure a flow path for convection of the air remaining between the lens 3 and the semiconductor-type light source 2. As a result, even when convection occurs from the lower side to the upper side of the light source mounting surface 54, the semiconductor light source 2 can be efficiently radiated without hindering the air flow by the harness or the like. .

  In the present embodiment, the light source holder 21 and the power supply member 6 have been described as an integrated example. However, the present invention is not limited to this, and the light source holder 21 and the power supply member 6 may be changed according to the power supply method of the semiconductor light source 2. The light source holder 21 and the power feeding member 6 may be separate.

DESCRIPTION OF SYMBOLS 1 Vehicle lamp 2 Semiconductor type light source 20 Board | substrate 21 Light source holder 22 Holder part 23 Screw 3 Lens 30 Lens part 31 Flange part 32 Incidence surface 33 Outgoing surface 4 Lens holder 41 Holding cylinder part 42 Holding edge part 43 Mounting base part 5 Heat radiating member 51 Base plate portion 51a Upper end portion 51b Lower end portion 52 Optical member attachment surface 54 Light source attachment surface 55 Stepped portion 56 Fin 57 Light source attachment portion 58 Light source holder attachment portion 59 Opening portion 6 Power supply member 60 Power supply socket 61 Connector portion 62 Harness 7 Housing portion

Claims (4)

A light source, a heat radiating member to which the light source is attached, and an optical member that irradiates direct light from the light source in a predetermined direction, and the heat radiating member has a base plate portion erected in the vehicle vertical direction. The base plate portion is provided with a light source mounting surface for installing the light source, and the light source mounting surface is formed at a position farther from the optical member than the other surface of the base plate portion on the optical member side. And
The vehicular lamp, wherein the light source mounting surface extends from a lower end portion to an upper end portion of the base plate portion.   An optical member mounting surface is formed on the base plate portion of the heat radiating member at a position outside the light source mounting surface and closer to the optical member than the light source mounting surface. The vehicular lamp according to claim 1, wherein the vehicular lamp is mounted on a member mounting surface. 3. The vehicular lamp according to claim 1, wherein an opening for inserting a part of a power supply member that supplies power to the light source is provided in a part of the base plate part. 4. The light source is installed so that an outgoing optical axis of light is in a vehicle front direction, the optical member is installed to face the light source, and has an incident surface on which direct light from the light source is incident. The vehicle lamp according to any one of claims 1 to 3, wherein the vehicle lamp is provided.

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