JP2015090762A - Vehicle lighting appliance - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem that, in a conventional vehicle lighting appliance, a warp and a white cloud are generated sometime in a portion corresponding to a gate out of a reflection face of a reflection mirror.SOLUTION: A vehicle lighting appliance comprises a reflector 4. The reflector 4 is constituted of a reflector main body 400, a first extension part 43, and a second extension part 44. The reflector main body 400 has a main reflection face 40. The first extension part 43 extends so as to be vertical or substantially vertical to the main reflection face 40 from a face at a side opposite to the main reflection face 40 of the reflector main body 400. The second extension part 44 extends so as to be vertical or substantially vertical to the first extension part 43 between the first extension part 43 and a gate 45. As a result, the vehicle lighting appliance can prevent a warp and a white cloud at a point corresponding to the gate 45 out of the main reflection face 40 of the reflector main body 400.

Description

  The present invention relates to a vehicular lamp including a reflector having a reflecting surface that reflects light from a light source.

  This type of vehicular lamp is conventionally known (for example, Patent Document 1). A conventional vehicular lamp uses a reflecting mirror formed by injecting resin from a gate into a mold space. This reflecting mirror is provided with a reflecting surface. This reflecting surface reflects light from the light source.

JP 2007-323914 A

  However, the vehicular lamp uses a reflecting mirror formed by injecting resin from a gate into a mold space. For this reason, the resin injected into the mold space from the gate hits the reflection surface of the immediate reflection mirror. As a result, distortion or white clouding may occur in a portion of the reflecting surface of the reflecting mirror corresponding to the gate. In this case, it becomes difficult to accurately reflect the light from the light source.

  The problem to be solved by the present invention is that in a conventional vehicular lamp, distortion or white clouding may occur in a portion corresponding to the gate of the reflecting surface of the reflecting mirror.

  This invention (invention according to claim 1) is provided with a reflector having a reflecting surface for reflecting light from a light source, and the reflector is molded by filling a resin from a gate into a mold space. A reflector body having a reflecting surface, a first extension extending perpendicularly or substantially perpendicularly to the reflecting surface from a surface opposite to the reflecting surface of the reflector body; It is characterized by comprising a second extension extending perpendicularly or substantially perpendicular to the first extension between the first extension and the gate.

  In the vehicular lamp of the present invention, the resin filled in the mold space from the gate reaches the reflector body through the second extension and the first extension. For this reason, the resin does not immediately hit the reflecting surface of the reflector body due to the damper (buffer) action of the second extension portion and the first extension portion. That is, when the resin passes through the second extension portion and the first extension portion, the heat and filling speed of the resin are reduced, and the resin in that state only hits the reflecting surface of the reflector body. Thereby, the distortion and white clouding in the location corresponding to a gate among the reflective surfaces of a reflector main body can be prevented. As a result, distortion and white clouding do not affect the reflecting surface of the reflector body, and light from the light source can be accurately reflected.

FIG. 1 is a plan view of a lamp unit showing an embodiment of a vehicular lamp according to the present invention. FIG. 2 is a perspective view of the reflector. FIG. 3 is a longitudinal sectional view of the reflector (a sectional view taken along line III-III in FIG. 2). 4 is a longitudinal sectional view of the lamp unit (a sectional view taken along line IV-IV in FIG. 1). FIG. 5 is a longitudinal sectional view of the lamp unit (a sectional view taken along line VV in FIG. 1).

  Hereinafter, an example of an embodiment (example) of a vehicular lamp according to the present invention will be described in detail with reference to the drawings. In addition, this invention is not limited by this embodiment. In FIG. 4, hatching of the projection lens is omitted. In this specification, front, rear, upper, lower, left, and right are front, rear, upper, lower, left, and right when the vehicle lamp according to the present invention is mounted on a vehicle.

(Description of Configuration of Embodiment)
Hereinafter, the configuration of the vehicular lamp in this embodiment will be described. In this example, for example, a headlamp of an automotive headlamp will be described.

(Description of vehicle lamp 1)
In FIG. 1, the code | symbol 1 is a vehicle lamp in this embodiment. The vehicle lamp 1 is mounted on both the left and right sides of the front portion of the vehicle. As shown in FIG. 1, the vehicular lamp 1 includes a lamp housing (not shown), a lamp lens (not shown), a semiconductor light source 2, a projection lens 3, a reflector 4, and a heat radiating member. Heat sink member 5.

  The lamp housing and the lamp lens (for example, a transparent outer lens) define a lamp chamber (not shown). The semiconductor-type light source 2, the projection lens 3, the reflector 4, and the heat sink member 5 constitute a projector-type lamp unit. The lamp units 2, 3, 4, and 5 are disposed in the lamp chamber, and are provided with a vertical optical axis adjustment mechanism (not shown) and a horizontal optical axis adjustment mechanism (not shown). Are attached to the lamp housing.

(Description of heat sink member 5)
The heat sink member 5 is made of a material having high thermal conductivity such as resin or metal die casting (aluminum die casting). The semiconductor light source 2, the projection lens 3, and the reflector 4 are attached to the heat sink member 5. The heat sink member 5 serves as both a heat radiating member and a mounting member. The heat sink member 5 includes a plate portion 50 and a plurality of upper fin portions 56 and lower fin portions 57.

  The plate portion 50 includes a first horizontal plate portion 51, a second horizontal plate portion 52, a vertical plate portion 53, a ring plate portion 54, and an oblique plate portion 55. The vertical plate portion 53 is integrally provided between the front side of the first horizontal plate portion 51 and the rear side of the second horizontal plate portion 52. The ring plate portion 54 is integrally provided on the front side of the second horizontal plate portion 52. The oblique plate portion 55 is integrally provided on the rear side of the first horizontal plate portion 51.

  On one surface of the first horizontal plate portion 51 and one surface of the oblique plate portion 55, a plurality of the upper fin portions 56 are integrally provided in the front-rear direction and in parallel or substantially in parallel. On one surface of the second horizontal plate portion 52 and one surface of the vertical plate portion 53, a plurality of the upper fin portions 56 are integrally provided in the front-rear direction and in parallel or substantially in parallel. On the other surface of the first horizontal plate portion 51, the other surface of the second horizontal plate portion 52, the other surface of the vertical plate portion 53, and the other surface of the oblique plate portion 55, a plurality of sheets in this example, nine sheets The lower fin portion 57 is integrally provided in the front-rear direction and in parallel or substantially in parallel. As shown in FIG. 5, the nine lower fin portions 57 have a substantially bilaterally symmetric shape.

(Description of reflector 4)
The reflector 4 is made of, for example, a highly heat-resistant and light-impermeable material such as a resin member. The reflector 4 is attached to the first horizontal plate portion 51 of the heat sink member 5 with a screw 42. The reflector 4 is composed of a synthetic resin mold product formed by filling a resin (not shown) with a synthetic resin from a gate 45 into a mold (not shown). The reflector 4 includes a reflector main body 400, a first extension portion 43, and a second extension portion 44.

  The reflector main body 400 has a hollow shape in which a front side portion and a lower side portion are opened, and a rear side portion, an upper side portion, and left and right side portions are closed. On the concave inner surface of the closed portion of the reflector main body 400, a main reflection surface (convergent reflection surface) 40 and an additional reflection surface 41 are provided, which are free-form surfaces based on a spheroid (ellipse). ing.

  The main reflecting surface 40 is composed of a free-form surface and has a first focal point and a second focal point (or a second focal line) and an optical axis. The main reflection surface 40 reflects a part of light from the semiconductor-type light source 2 to the projection lens 3 side as reflected light. The additional reflection surface 41 is disposed on the projection lens 3 side with respect to the main reflection surface 40. The additional reflection surface 41 reflects a part of light from the semiconductor-type light source 2 as reflected light to the projection lens 3 side and an additional reflection surface portion side of a metal plate member (not shown).

  The gate 45 is located at an intermediate portion of the lower opening of the rear portion of the reflector body 400. The first extension 43 is integrally extended perpendicularly or substantially perpendicularly to the main reflection surface 40 from the surface of the reflector body 400 opposite to the main reflection surface 40. The second extension 44 extends integrally from the first extension 43 to the gate 45 vertically or substantially perpendicularly to the first extension 43. The resin filled in the mold space from the gate 45 reaches the reflector body 400 through the second extension 44 and the first extension 43.

(Description of the semiconductor-type light source 2)
The semiconductor-type light source 2 is a self-luminous semiconductor-type light source such as an LED, an OEL, or an OLED (organic EL). The semiconductor-type light source 2 includes a package (LED package) in which a light-emitting chip (LED chip) having a light-emitting surface that emits light is sealed with a sealing resin member. The package is mounted on a substrate. A current from a power source (battery) is supplied to the light emitting chip through a circuit or the like via a connector attached to the substrate.

  The semiconductor light source 2 is mounted on the heat sink member 5 and attached to the first horizontal plate portion 51 of the heat sink member 5 via a holder 20. The holder 20 is attached to the first horizontal plate portion 51 of the heat sink member 5 with a screw 21. The light emitting surface of the semiconductor-type light source 2 is located at or near the first focal point of the main reflecting surface 40 of the reflector 4. The light emitting surface of the semiconductor light source 2 faces the main reflection surface 40 and the additional reflection surface 41 of the reflector 4.

(Description of the projection lens 3)
The projection lens 3 is made of a resin lens such as a PC material, a PMMA material, or a PCO material. That is, since the light emitted from the semiconductor light source 2 does not have high heat, a resin lens can be used as the projection lens 3. The projection lens 3 is attached to the ring plate portion 54 of the heat sink member 5. The projection lens 3 may be attached to the heat sink member 5 using a holder separate from the heat sink member 5 instead of the ring plate portion 54.

  The projection lens 3 is light from the semiconductor-type light source 2, and the reflected light from the main reflection surface 40 and the additional reflection surface 41 is converted into a predetermined light distribution pattern, in this example, a low beam light distribution pattern and others. The light distribution pattern (for example, additional light distribution pattern, overhead sign light distribution pattern, auxiliary light distribution pattern) is irradiated to the outside, that is, the front of the vehicle. The projection lens 3 is a projection lens based on an aspherical surface. The projection lens 3 includes a rear entrance surface 30 and a front exit surface 31. The incident surface 30 faces the main reflecting surface 40 of the reflector 4. The incident surface 30 is substantially flat or aspherical (convex or concave with respect to the main reflecting surface 40). The exit surface 31 is an aspherical convex surface.

  The lens focal point of the projection lens 3 (the meridional image plane that is the focal plane on the object space side) coincides with or substantially coincides with the second focal point of the main reflecting surface 40. A metal plate member as a light-impermeable member may be disposed between the projection lens 3 and the reflector 4 and the semiconductor light source 2 in some cases. The metal plate member is attached to the heat sink member 5. The metal plate member is light remaining from the semiconductor-type light source 2 and remaining reflected light that is not cut off by cutting off a part of the reflected light reflected by the main reflecting surface 40 of the reflector 4. A low beam light distribution pattern is formed. Further, the metal plate member may form the other light distribution pattern.

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

  The semiconductor light source 2 is turned on and emitted. Then, a part of the light emitted from the semiconductor-type light source 2 is reflected to the projection lens 3 side by the main reflection surface 40 and the additional reflection surface 41 of the reflector 4. The reflected light is transmitted through the projection lens 3, and a predetermined light distribution pattern, in this example, a low beam light distribution pattern and other light distribution patterns (for example, an additional light distribution pattern, an overhead sign light distribution pattern, an auxiliary light distribution pattern). As shown in FIG.

  On the other hand, heat generated in the semiconductor light source 2 is released to the outside through the heat sink member 5. That is, the heat generated in the semiconductor light source 2 is conducted to the first horizontal plate portion 51 of the heat sink member 5. The heat conducted to the first horizontal plate portion 51 is transferred from the first horizontal plate portion 51 to other portions (other portions of the first horizontal plate portion 51, the vertical plate portion 53, the second horizontal plate portion 52, It is conducted to the ring plate portion 54, the oblique plate portion 55) and the plurality of fin portions (the plurality of upper fin portions 56 and the nine lower fin portions 57). The heat transmitted to the first horizontal plate portion 51 and the heat transmitted from the first horizontal plate portion 51 to other portions and the plurality of fin portions are the first horizontal plate portion 51 and other portions and the plurality of pieces. From the surface of the fin part to the outside (in the atmosphere) by convection and radiation.

(Explanation of effect of embodiment)
The vehicular lamp 1 according to this embodiment has the above-described configuration and operation, and the effects thereof will be described below.

  In the vehicle lamp 1 in this embodiment, the resin filled in the mold space from the gate 45 passes through the second extension 44 and the first extension 43 to reach the reflector main body 400. For this reason, the resin does not immediately hit the main reflecting surface 40 of the reflector main body 400 due to the damper (buffer) action of the second extension 44 and the first extension 43. That is, when the resin passes through the second extension 44 and the first extension 43, the heat and filling speed of the resin are reduced, and the resin in that state only hits the main reflecting surface 40 of the reflector body 400. Thereby, the distortion and white clouding in the location corresponding to the gate 45 among the main reflective surfaces 40 of the reflector main body 400 can be prevented. As a result, distortion and white clouding do not affect the main reflection surface 40 of the reflector body 400, and the light from the semiconductor-type light source 2 can be accurately reflected.

(Description of example other than embodiment)
In this embodiment, a projector-type vehicular lamp (lamp units 2, 3, 4, 5) will be described. However, in the present invention, light from a vehicle lamp (lamp unit) other than the projector-type vehicle lamp (lamp units 2, 3, 4, 5), for example, light from a semiconductor-type light source is reflected by the reflecting surface of the reflector. Also, it can be used for a vehicle lamp (lamp unit) of a reflecting surface (reflector) type that emits the reflected light through a lens.

  In this embodiment, the semiconductor light source 2 is used as the light source. However, in the present invention, a light source other than the semiconductor light source 2, such as a discharge lamp, a halogen lamp, an incandescent lamp, etc., may be used as the light source.

DESCRIPTION OF SYMBOLS 1 Vehicle lamp 2 Semiconductor type light source 20 Holder 21 Screw 3 Projection lens 30 Incident surface 31 Output surface 4 Reflector 40 Main reflective surface 41 Additional reflective surface 42 Screw 43 1st extension part 44 2nd extension part 45 Gate 400 Reflector main body 5 Heat sink Member (Heat dissipation member)
50 plate portion 51 first horizontal plate portion 52 second horizontal plate portion 53 vertical plate portion 54 ring plate portion 55 oblique plate portion 56 upper fin portion 57 lower fin portion

Claims (1)

A reflector having a reflecting surface for reflecting light from the light source;
The reflector is
It is composed of a synthetic resin mold molded product filled with synthetic resin from the gate into the mold space,
A reflector body having the reflective surface;
A first extension extending perpendicularly or substantially perpendicularly to the reflective surface from a surface opposite to the reflective surface of the reflector body;
A second extension extending perpendicularly or substantially perpendicularly to the first extension between the first extension and the gate;
Composed of,
A vehicular lamp characterized by the above.

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