JP2013149355A - Vehicular lamp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicular lamp that can easily secure heat radiation without enlarging the dimensions of the lamp.SOLUTION: In a vehicular lamp including a first light source 3, a lens member 30 arranged in front of the first light source 3 and irradiating light from the first light source 3 toward front of a vehicle, and a second light source 4, the lens member 30 is partly formed as a reflection part 32 for reflecting the light irradiated from the front toward front of the vehicle, and the second light source 4 is arranged in front of the reflection part 32.

Description

  The present invention relates to a vehicular lamp.

  In a vehicular lamp using a planar light emitting element such as a semiconductor light emitting element, the light source can be handled as a point light source, and the degree of freedom in lamp layout is increased compared to the case of using a bulb-type light source. Can do. As such a vehicular lamp, for example, those shown in Patent Document 1 and Patent Document 2 are known.

JP 2006-302713 A JP 2005-108554 A

  In general, in a vehicle lamp, it is necessary to simultaneously form both a low beam light distribution pattern and a high beam light distribution pattern. For this reason, the lamp of Patent Document 1 has a configuration in which a low beam projector type lamp unit and a high beam reflection type lamp unit are formed separately and arranged vertically. However, in such a structure, the size of the lamp when viewed from the front of the vehicle increases in size up and down.

  On the other hand, the lamp of Patent Document 2 has a configuration in which two light sources are arranged back to back, and reflectors are arranged on the top and bottom, respectively, so that reflected light from these upper and lower reflectors passes through the same lens. . According to such a configuration, the vertical dimension of the lamp can be reduced by irradiating light from the two light sources forward from the same lens. However, in this case, since the two semiconductor light sources are arranged close to each other, it is difficult to ensure heat dissipation.

  Then, this invention makes it a subject to provide the vehicle lamp which can ensure heat dissipation easily without the dimension of a lamp being enlarged.

In order to achieve the above object, according to the present invention,
A first light source;
A lens member disposed in front of the first light source and irradiating light from the first light source forward of the vehicle;
A second light source,
A part of the lens member is formed as a reflection part for reflecting light emitted from the front toward the front of the vehicle,
The vehicular lamp is provided in which the second light source is disposed in front of the reflecting portion.

In the vehicle lamp according to the present invention,
The reflection part may be formed by projecting a part of the lens member rearward.

In the vehicle lamp according to the present invention,
The second light source may be formed of a planar light emitting element, disposed on a substantially horizontal plane, and disposed opposite to the reflecting portion.

In the vehicle lamp according to the present invention,
You may further provide the reflector which reflects the irradiation light from said 1st light source toward the said lens member.

In the vehicle lamp according to the present invention,
The reflector may be provided behind the reflecting portion.

In the vehicle lamp according to the present invention,
The reflection portion may be subjected to a reflection surface treatment on a part of the surface of the lens member.

  According to the vehicular lamp according to the present invention, it is possible to form a light distribution pattern for a high beam and a low beam using a single lens member and the respective emitted lights from the first and second light sources. In this case, since a single lens member is used, the size of the lamp when viewed from the front of the lamp does not increase. In addition, since the first and second light sources can be arranged apart from the front and back of the lens member, heat dissipation can be ensured.

It is sectional drawing of the vehicle lamp which concerns on embodiment of this invention. It is the side view and front view of a lens member of the vehicle lamp shown in FIG. It is a schematic diagram which shows the path | route of the light from the 1st light source and 2nd light source of the vehicle lamp shown in FIG. It is sectional drawing of the vehicle lamp which concerns on a reference example.

  Hereinafter, an embodiment in which a vehicular lamp according to the present invention is applied to a vehicular headlamp will be described with reference to FIGS. 1 to 3.

  FIG. 1 is a cross-sectional view of a vehicle headlamp. As shown in FIG. 1, the vehicle headlamp includes a lamp body 1 having an opening opening in front of the lamp and an outer cover 2 made of a transparent resin. The outer cover 2 is disposed so as to close the opening of the lamp body 1 from the front, and forms a lamp chamber S with the lamp body 1. A lamp unit 10 is disposed in the lamp chamber S. In the following description, the arrow X1 shown in FIG. 1 is referred to as the front, and the arrow Y1 is referred to as the upward.

  The lamp unit 10 includes a metal support member 20 on which the first light source 3 and the second light source 4 are mounted, a lens member 30 made of transparent resin, and the front surface of the lens member 30 being exposed forward of the vehicle. And an extension 5 for shielding members inside the lamp chamber S. The support member 20 includes a reflector 40 provided so as to cover the first light source 3 from above, a shade member 50 capable of forming a light distribution pattern by blocking part of the reflected light from the reflector 40, and a lens member. 30 is attached.

  The support member 20 includes a plate-like base portion 21 extending in the vertical direction, a first mounting portion 22 provided so as to protrude forward in the vicinity of the center of the base portion 21, and from the upper portion of the base portion 21 toward the front. And a plate-like second mounting portion 23 that protrudes. The base portion 21 is attached to the lamp body 1 via the aiming screw 6. By adjusting the aiming screw 6, the optical axis of the vehicular lamp can be adjusted.

  The first light source 3 and the second light source 4 are planar light emitting elements made of a semiconductor such as an LED or an LD. The first light source 3 is mounted on the upper surface of the first mounting portion 22 with the light emitting surface facing upward. The second light source 4 is provided in front of the first light source 3 and is disposed on the lower surface of the second mounting portion 23 with the light emitting surface facing downward. The first light source 3 employs a light emitting element capable of irradiating a low beam light distribution pattern, and the second light source 4 employs a light emitting element capable of irradiating a high beam light distribution pattern.

  Further, the lower surface of the second mounting portion 23 on which the second light source 4 is disposed is formed so as to form a substantially horizontal plane. Thereby, when the vehicle lamp is viewed from the front, the second light source 4 can be arranged at a position that is difficult to see from the outside.

  Moreover, the 1st radiation fin 24 and the 2nd radiation fin 25 are provided in the rear surface of the 1st mounting part 22, and the upper surface of the 2nd mounting part 23, respectively. The heat generated from the first light source 3 is radiated through the first radiation fins 24, and the heat generated from the second light source 4 is radiated through the second radiation fins 25.

  The reflector 40 is provided above the first mounting portion 22 and is arranged so that the spheroid surface of the reflector 40 covers the first light source 3 from above. The position of the reflector 40 is adjusted so that the first focal point of the spheroidal surface is in the vicinity of the light emitting surface of the first light source 3. Thereby, the reflector 40 reflects the light from the first light source 3 to the front side of the lamp.

  The shade member 50 is fixed to the front surface of the first mounting portion 22 with screws 51. On the upper surface of the shade member 50, a ridgeline 52 formed in a shape corresponding to the cut-off line of the low beam light distribution pattern is provided.

  The lens member 30 is a member formed by injection molding a transparent resin, and the rear surface of the lower end thereof is fixed to the front end surface of the shade member 50 by vibration welding. The lens member 30 is disposed in front of the first light source 3 and irradiates light from the first light source 3 toward the front of the vehicle.

  FIG. 2 is an enlarged view showing the lens member 30, (a) is a side view, and (b) is a front view. As shown in FIG. 2, the lower half of the lens member 30 is formed as a lens portion 31, and the upper half of the lens member 30 is a concave shape formed so as to protrude obliquely rearward from the upper end portion of the lens portion 31. The reflection part 32 is formed. The reflection portion 32 constitutes the upper half of the lens member 30 and is disposed behind the second light source 4 and ahead of the reflector 40 (see FIG. 1).

  The lens part 31 and the reflection part 32 are integrally formed. In addition, a reflective surface 33 is formed on the front surface of the reflective portion 32. The reflecting surface 33 is formed by metal vapor deposition using a metal such as aluminum, and is a paraboloid as shown in FIG. The reflecting surface 33 is formed so that the focal point thereof is in the vicinity of the second light source 4 and the axis thereof is slightly inclined upward. Thereby, the light emitted from the second light source 4 is reflected by the reflecting surface 33 of the reflecting portion 32 and is emitted as substantially parallel light obliquely forward of the lamp.

  On the other hand, the lens unit 31 is a plano-convex lens in which the rear surface 31a is a flat surface and the front surface 31b is a convex surface. The rear focal point of the lens unit 31 is adjusted to be near the second focal point F2 (see FIG. 1) of the reflector 40. Thereby, the light reflected by the reflector 40 from the first light source 3 is emitted from the lens unit 31 to the front side of the lamp as substantially parallel light.

The light path in the vehicular lamp configured as described above will be described with reference to FIG.
As shown in the figure, the light emitted from the first light source 3 is reflected by the reflector 40 so as to be condensed toward the second focal point F2. The reflected light from the reflector 40 further enters the lens portion 31 of the lens member 30 and is emitted parallel to the front of the lamp. Here, a part of the reflected light from the reflector 40 is blocked by the ridgeline 52 of the shade member 50 located in the vicinity of the second focal point F <b> 2 of the reflector 40. Thereby, the light emitted in front of the lamp forms a light distribution pattern for low beam having a cut-off line.

  Further, as shown in FIG. 3, the light emitted from the second light source 4 disposed in front of the reflecting portion 32 is reflected by the reflecting surface 33 of the lens member 30 that is a paraboloid of revolution, and is slightly forward of the lamp. Are emitted upward to form a light distribution pattern for a high beam.

  Thus, the vehicular lamp according to the present embodiment can simultaneously form both the low beam light distribution pattern and the high beam light distribution pattern with the single lamp unit 10. Further, when the vehicular lamp is viewed from the front of the lamp, high beam light is emitted from the upper half of the single lens member 30, and low beam light is emitted from the lower half. That is, a compact structure is realized by sharing the function of the single lens member 30 up and down.

  That is, when the vehicular lamp according to the present embodiment is compared with a general projector-type vehicular lamp 100 as shown in FIG. 4, the vehicular lamp 100 has most of light L2 emitted from the light emitting element 103. Is reflected by the reflector 40 covering the light emitting element 103 from above and is incident on the lower half of the projection lens 130, so that the upper half of the projection lens 130 is not effectively used.

  On the other hand, in the vehicular lamp according to the present embodiment, it is possible to configure different optical systems in the upper half and the lower half of the single lens member 30 by adopting the above-described configuration. Even though the single lens member 30 is used, the light distribution patterns for the high beam and the low beam can be formed by using the light emitted from the first light source 3 and the second light source 4. . Therefore, according to the vehicular lamp according to the present embodiment, the size of the lamp when viewed from the front of the vehicle is not increased, and the lamp can be configured compactly.

  In the vehicular lamp according to the present embodiment, the first light source 3 and the second light source 4 are provided at positions separated in the front-rear direction across the lens member 30, and the light emitting surfaces face each other. Has been placed. For this reason, the heat generated in the first light source 3 and the second light source 4 is divided by the lens member 30 and does not merge.

  Thereby, the heat generated in the first light source 3 is radiated toward the rear of the lamp through the first heat radiation fin 24, and the heat generated in the second light source 4 is radiated toward the upper side of the lamp through the second heat radiation fin 25. Therefore, the first light source 3 and the second light source 4 can be efficiently cooled. Therefore, each of the first light source 3 and the second light source 4 is hardly affected by heat, and a vehicular lamp having a long life can be realized.

  Moreover, when the vehicle lamp provided with the 1st light source 3 and the 2nd light source 4 is comprised compactly, the heat | fever generate | occur | produced from both light sources tends to have a bad influence mutually. However, in the vehicular lamp according to the present embodiment, the heat radiation paths can be configured not to merge with each other, so that adverse effects due to heat can be further reduced.

  Further, in the vehicular lamp according to the present embodiment, since the reflecting portion 32 is formed by projecting a part of the lens member 30 rearward, the second light source on the front side has a simple structure. The structure which reflects the irradiation light from 4 ahead can be implement | achieved. Thereby, the lens member 30 can be easily manufactured by resin molding or the like.

  Furthermore, in this case, since the second light source 4 is formed by a planar light emitting element and is disposed on the horizontal plane (the lower surface of the second mounting portion 23) facing the reflecting portion 32, the second light source 4 is a vehicle. It will be arrange | positioned in the position which is hard to see from the front, and the outstanding external design can be implement | achieved.

  In the present embodiment, since the reflector 40 that reflects the irradiation light from the first light source 3 toward the lens member 30 is provided, the position of the first light source 3 can be determined relatively freely. It is possible to improve the degree of freedom of design.

  Further, since the reflector 40 is provided behind the reflecting portion 32, the reflector 40 is not visually exposed when viewed from the front of the lamp. Thereby, the designability can be further improved. In addition, since the reflector 40 reflects light toward the lens unit 31 provided below the reflecting surface 33, even if the reflector 40 is disposed behind the reflecting unit 32, the functions of each other do not interfere with each other. The space inside the lamp room can be used effectively.

  Furthermore, since the reflection part 32 is implement | achieved by giving a reflective surface process to a part of surface of the lens member 30, and forming the reflective surface 33, it is possible to form the reflection part 32 easily, and to manufacture. Is easy.

  In the above-described embodiment, an example in which the light distribution pattern for low beam is formed by the first light source 3 and the light distribution pattern for high beam is formed by the second light source 4 has been described. Not limited.

  For example, the first light source 3 may form a high beam light distribution pattern, and the second light source 4 may form a low beam light distribution pattern. In this case, the lens unit 31 may be formed so that the light emitted from the lens unit 31 faces slightly upward.

  Alternatively, the first light source 3 may form a low beam light distribution pattern, and the second light source 4 may form a fog lamp, a daytime line-up lamp, a turn signal lamp, or the like. Or, conversely, the first light source 3 may form a fog lamp, a daytime line-up lamp, a turn signal lamp or the like, and the second light source 4 may form a low beam light distribution pattern. When the first light source 3 forms a light distribution pattern other than the low beam distribution pattern, the above-described shade member 50 is not necessary.

  Moreover, you may make it employ | adopt the structure which reversed the above-mentioned embodiment upside down. That is, the first light source 3 is disposed downward, the reflector 40 is disposed so as to cover the first light source 3 from below, the second light source 4 is disposed upward, and the upper half of the lens member 30 is disposed in the lens portion. 31 and the lower half may be the reflecting portion 32.

  Moreover, it is preferable that the first light source 3 is arranged so that its emission axis is inclined rearward. Thereby, the light emitted from the first light source 3 can be efficiently incident on the reflector 40.

  Furthermore, in the above-described embodiment, the example in which the reflecting surface 33 is formed on the lens member 30 by metal vapor deposition has been described. However, the present invention is not limited to this, and other reflecting surface treatments are adopted. May be. For example, the total reflection surface 33 may be formed by forming a minute reflection step on the rear surface of the reflection portion 32 of the lens member 30. Alternatively, the reflecting surface 33 may be formed by attaching a metal plate having a mirror surface to the front surface of the reflecting portion 32.

  Moreover, although the above-mentioned embodiment demonstrated the example which applied this invention to the vehicle headlamp, you may apply this invention to a vehicle marker lamp, without being limited to this.

  Further, the vehicular lamp according to the present embodiment can be applied to a four-wheel vehicle, and can also be applied to a three-wheel or two-wheel vehicle.

1: lamp body, 2: outer cover, 3: first light source, 4: second light source, 5: extension, 6: aiming screw, 10: lamp unit, 20: support member, 21: base part, 22: 1st mounting surface, 23: 2nd mounting surface, 24: 1st radiation fin, 25: 2nd radiation fin, 30: lens member, 31: lens part, 32: reflection part, 33: reflection surface, 40: reflector, F2: Second focus, 50: Shade member, 51: Ridge line, S: Lamp chamber

Claims (6)

A first light source;
A lens member disposed in front of the first light source and irradiating light from the first light source forward of the vehicle;
A second light source,
A part of the lens member is formed as a reflection part for reflecting light emitted from the front toward the front of the vehicle,
The vehicular lamp, wherein the second light source is disposed in front of the reflecting portion.   The vehicular lamp according to claim 1, wherein the reflecting portion is formed by projecting a part of the lens member rearward.   3. The vehicular lamp according to claim 1, wherein the second light source is formed by a planar light emitting element, is disposed on a substantially horizontal plane, and is disposed to face the reflecting portion.   The vehicular lamp according to any one of claims 1 to 3, further comprising a reflector that reflects the irradiation light from the first light source toward the lens member.   The vehicular lamp according to claim 4, wherein the reflector is provided behind the reflecting portion. 6. The vehicular lamp according to claim 1, wherein the reflecting portion is formed by subjecting a part of the surface of the lens member to a reflecting surface treatment. 6.

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