JP2014102903A - Lighting fixture for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a compact lighting fixture for a vehicle which does not increase the width in a direction intersecting the optical axis of a lens even when being provided with at least three light emission elements.SOLUTION: A lighting fixture for a vehicle includes: a substrate; a first light emission element, a second light emission element and a third light emission element arranged on the substrate; a first reflector which reflects light of the first light emission element to the lens side; a second reflector which reflects light of the second light emission element to the lens side; and a third reflector which reflects light of the third light emission to the lens side. The second light emission element, the first light emission element and the third light emission element are arranged in a second direction vertical to a first direction in the order, the second light emission element and the third light emission element are arranged on the rear side in the first direction with respect to the first light emission element, and the first reflector, the second reflector and the third reflector are respectively arranged such that the optical axis of the first reflector, the optical axis of the second reflector and the optical axis of the third reflector intersect one another in the near side of the lens.

Description

  The present invention relates to a vehicular lamp, and more particularly to a vehicular lamp in which a light source is configured by mounting three or more light emitting elements on a substrate.

As a vehicular lamp in which a light source is configured by mounting two light emitting elements on a substrate, for example, a lamp described in Patent Document 1 below is known.
In the vehicular lamp described in Patent Document 1, two light emitting elements are mounted on a substrate on a straight line orthogonal to the irradiation direction, and two reflectors covering each light emitting element have their optical axes. It is configured to be arranged so as to intersect in front of the lens. In this case, the reflecting surface of each reflector is constituted by a part of an elliptical shape, the light emitting element is arranged at one focal point, and the intersection point of the optical axis of each reflector is positioned at the other focal point.

JP 2006-114275 A

However, in the case where the number of light emitting elements is increased from two to three based on the configuration of the vehicle lamp described in Patent Document 1, one light emitting element is disposed on the central axis of the lens. In both cases, the other two light emitting elements are arranged on both sides of the central axis so as to be arranged in a straight line with the light emitting elements.
In this case, each light emitting element is individually provided with a reflector for reflecting the light from the light emitting element in the direction of the lens, so that the width of the vehicular lamp (in the direction intersecting the optical axis of the lens). This has the disadvantage that the dimension of (width) becomes significantly large.

  The present invention has been made based on such circumstances, and the object thereof is a compact that does not increase the width in the direction intersecting the optical axis of the lens even if three or more light emitting elements are provided. Is to provide a vehicular lamp.

  In order to achieve such an object, the present invention provides three or more light emitting elements arranged behind the lens, and the three light emitting elements are arranged in parallel in a direction crossing the optical axis of the lens. Of these, the light emitting elements on both sides are arranged rearward with respect to the middle light emitting element. With this configuration, it is not necessary to increase the width in the direction intersecting the optical axis of the lens. For this reason, a compact vehicular lamp can be obtained.

The present invention is grasped by the following composition.
(1) A vehicular lamp according to the present invention is a vehicular lamp that irradiates light in a first direction through a lens, and includes a substrate, a first light-emitting element, a second light-emitting element disposed on the substrate, And a third light emitting element, a first reflector for reflecting the light of the first light emitting element toward the lens, a second reflector for reflecting and emitting the light of the second light emitting element toward the lens, and the third A third reflector that reflects the light of the light emitting element toward the lens, and the second light emitting element, the first light emitting element, and the third light emitting element are in this order, the second orthogonal to the first direction. The second light emitting element and the third light emitting element are arranged behind the first light emitting element in the first direction, the first reflector, the second reflector, and the third reflector. Respectively of the first reflector The optical axis, the optical axis of the second reflector, and the optical axis of the third reflector are arranged so as to intersect with each other in front of the lens.
(2) The vehicular lamp according to the present invention is characterized in that, in the configuration of (1), the first reflector has a reflecting surface area smaller than the second reflector and the third reflector. To do.
(3) The vehicular lamp according to the present invention is the configuration of (1), wherein the first reflector, the second reflector, and the third reflector have reflecting surfaces that are a first light emitting element, a second light emitting element, The third light-emitting element is a part of an approximately elliptical shape with the focal point positioned.
(4) The vehicular lamp according to the present invention has the configuration (1) in which the optical axis of the second reflector and the optical axis of the third reflector are within 35 ° with respect to the optical axis of the first reflector. It intersects at an angle of.

  The vehicular lamp configured as described above can be configured compactly without increasing the width in the direction intersecting the optical axis of the lens, even if three or more light emitting elements are provided.

It is a perspective view which shows the external appearance of Embodiment 1 of the vehicle lamp of this invention. It is the perspective view which decomposed | disassembled the vehicle lamp shown in FIG. It is the top view which showed the outline of the arrangement | positioning relationship of the light emitting element and reflector of the vehicle lamp of this invention. It is the figure which extracted and showed the reflective surface of each reflector in the figure shown in FIG. It is the figure which showed the light distribution pattern of Embodiment 1 of the vehicle lamp of this invention. It is the figure which showed the light distribution pattern of Embodiment 2 of the vehicle lamp of this invention.

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. Note that the same number is assigned to the same element throughout the description of the embodiment.
(Embodiment 1)
FIG. 1 is a perspective view showing an appearance of a first embodiment of a vehicular lamp according to the present invention, and FIG. 2 is an exploded perspective view of the vehicular lamp.

1 and 2 show a vehicular lamp 10 mounted, for example, in front of the vehicle. The vehicular lamp 10 is, for example, a cornering lamp disposed on the right side when viewed from the front of the vehicle, and its optical axis is normally set with an inclination of approximately 50 ° with respect to the front of the vehicle. In the figure, the x direction is in a direction inclined approximately 50 ° to the right side with respect to the vehicle front direction F, the y direction is in the direction perpendicular to the x direction in the horizontal direction of the vehicle, and the z direction is in the vehicle height direction Matched.
1 and 2, first, there is a frame 12, and this frame 12 is provided in front of the vehicular lamp 10, and in front of the x direction in the drawing (sometimes referred to as the first direction in this specification). For example, a lens 14 made of a cylindrical lens is attached.

The frame 12 is a flat surface having a stepped portion (a height h that is approximately ½ of the height H of the lens 14 in the z direction in the drawing) with respect to the mounting surface 12A of the lens 14 at the rear in the x direction in the drawing. 12B is formed, and for example, a circuit board 18 is fixed to the flat surface 12B by a fastener 20.
A shade 16 is disposed at the stepped portion of the frame 12, and the shade 16 is light from a light emitting element (shown by reference numerals 301, 302, and 303 in the figure) irradiated from the rear in the x direction in the figure. A part of them is shielded from light.
On the surface of the circuit board 18, a light emitting element 301 (sometimes referred to as a first light emitting element in this specification), a light emitting element 302 (sometimes referred to as a second light emitting element in this specification), and a light emitting element 303. (May be referred to as a third light emitting element in this specification).

The light-emitting element 302, the light-emitting element 301, and the light-emitting element 303 are arranged in this order in the y direction in the drawing (sometimes referred to as a second direction in this specification), and the light-emitting element 302 and the light-emitting element 303 emit light. It is arranged behind the element 301 in the x direction in the figure.
In other words, on the surface of the circuit board 18, that is, on the same plane, a triangle is assumed in which a virtual line extending substantially parallel to the y direction in the figure is the base and a vertex on the virtual line in the x direction is the apex angle. In this case, the light emitting element 301 (first light emitting element) is arranged at the apex of the apex angle, and the light emitting element 302 (second light emitting element) and the light emitting element 303 (third light emitting element) are arranged at the apexes at the end of the base. Element) is arranged.

These light emitting elements 301, 302, and 303 are formed of pellet-shaped semiconductor elements, and a light irradiation region is provided on the upper surface thereof. Thereby, each light emitting element 301, 302, 303 mounted on the circuit board 18 is irradiated with light above the circuit board 18 (z direction in the figure).
The light emitting elements 301, 302, and 303 are electrically connected in series, and an electric power (not shown) from the outside is necessary for these series bodies to emit light through the drive circuit 32 on the circuit board 18. Is to be supplied.

Further, the circuit board 18 includes a reflector 361 (sometimes referred to as a first reflector in this specification), a reflector 362 (sometimes referred to as a second reflector in this specification), and a reflector 363 (in this specification, a first reflector). The reflective member 36 in which the three reflectors are sometimes integrated is fixed.
The reflecting member 36 is arranged on the circuit board 18 so that the reflector 361 covers the light emitting element 301, the reflector 362 covers the light emitting element 302, and the reflector 363 covers the light emitting element 303.
Here, FIG. 3 is a plan view showing an optical positional relationship among the light emitting element 301, the light emitting element 302, the light emitting element 303, the reflector 361, the reflector 362, the reflector 363, the shade 16, and the lens 14.

  In FIG. 3, the reflector 361 constitutes a part of a substantially elliptical shape, and the light emitting element 301 is disposed at the focal point of the reflecting surface. Can pass through. Similarly, the reflector 362 constitutes a part of a substantially elliptical shape, and the light emitting element 302 is disposed at the focal point of the reflecting surface, and the optical axis 382 has a central point P in front of the shade 16 and the lens 14. It can be passed. Similarly, the reflector 363 constitutes a part of an approximately elliptical shape, and the light emitting element 303 is disposed at the focal point of the reflecting surface, and the optical axis 383 has a central point P in front of the shade 16 and the lens 14. It can be passed. In this case, the optical axis 382 of the reflector 362 and the optical axis 383 of the reflector 363 intersect at an angle α with respect to the optical axis 381 of the reflector 361 so that α is an angle within 35 °. ing. As a result, the size of the lens 14 in the width direction (y direction in the figure) can be reduced.

Since the reflector 361, the reflector 362, and the reflector 363 are arranged in accordance with the arrangement of the light emitting element 301, the light emitting element 302, and the light emitting element 303, the reflector 302, the reflector 301, and the reflector 303 are illustrated in this order. The reflector 302 and the reflector 303 are arranged in parallel in the middle y direction (sometimes referred to as the second direction in this specification), and are arranged behind the reflector 301 in the x direction in the figure.
Thus, the reflector 362 and the reflector 363 can be arranged close to each other without being affected by the presence of the reflector 361. For this reason, it becomes possible to provide a compact vehicular lamp that does not increase the width in the direction intersecting the optical axis of the lens 14 (the y direction in the figure).

  Here, the reflector 362 closer to the lens 14 side than the reflector 362 and the reflector 363 is configured by a part of an elliptical shape having the reflecting surface of the reflector 361 as the focal point at the point P on the light emitting element 301 and the shade 16. it can. In the reflector 362, the reflection surface is formed of a part of an elliptical shape with the points P on the light emitting element 302 and the shade 16 as focal points, and the reflector 363 also has the reflection surface as the light emitting element 303 and the shade 16 It consists of a part of an elliptical shape with the upper point P as each focal point. Thereby, for example, compared with the case where the reflector 361 is arranged in the same row as the other reflectors 362 and 363 (in the y direction in the figure), the reflective surface of the reflector 361 is made more than the reflective surfaces of the other reflectors 362 and 363. Can be made smaller.

Thereby, compared with the case where the reflector 361 is arranged in the same row as the other reflectors 362 and 363 (y direction in the figure), the area occupied by the reflector 361 can be reduced, and the reflector 362 and the reflector 363 can be reduced. They can be arranged close to each other without being greatly affected by the presence of 361.
FIG. 4 shows a configuration substantially similar to FIG. 4 is different from FIG. 3 in that a part of the center side of the reflectors 362 and 363 is cut in the x direction, and the reflectors 361, 362, and 363 are integrated to form the reflecting member 36. In FIG. 4 is a diagram showing the reflection surface 361R of the reflector 361, the reflection surface 362R of the reflector 362, and the reflection surface 363R of the reflector 363 in relation to the shade 16 and the lens 14, in particular.

  As is clear from FIG. 4, the reflecting surface 361R of the reflector 361 is significantly smaller than the reflecting surface 362R of the reflector 362 and the reflecting surface 363R of the reflector 363, and the light emitting element 302 via the reflector 362. Most of the light from the light-emitting element 303 through the reflector 363 passes through the lens 14 through the point P on the shade 16 and the vicinity thereof without being blocked by the reflector 361. It has become.

The reflecting member 36 includes a cover 401 that covers the light radiated from the reflector 361 to the lens 14 side, and a reflector 362 that covers the light radiated from the reflector 362 to the lens 14 side. However, the reflector 363 is provided with a cover 403 that covers the light emitted from the reflector 363 to the lens 14 side.
The reflection member 36 is provided with a stopper receiver 40 for locking the fastener 20 inserted into the frame 12 and the circuit board 18. As a result, the frame, the circuit board 18, and the reflection member 36 can be integrated by the fastener 20.

FIG. 5A shows a light distribution obtained on the screen when a screen is disposed in front of the vehicular lamp 10 having the above-described configuration and the light emitting elements 301 to 303 of the vehicular lamp are turned on. It is the figure which showed pattern DL. Note that the HH line and the VV line in FIG. 5A correspond to the horizontal direction and the vertical direction, respectively. Here, since the vehicular lamp shown in the first embodiment is a right cornering lamp as viewed from the front of the vehicle, the VV line is inclined at a position approximately 50 ° from the front of the vehicle to the horizontal right side.
FIG. 5B shows a light distribution pattern DL2 on the screen when only the light emitting element 302 is turned on under the same conditions as in FIG. FIG. 5C is a diagram showing a light distribution pattern DL1 on the screen when only the light emitting element 301 is turned on under the same conditions as FIG. Further, FIG. 5D shows a light distribution pattern DL3 on the screen when only the light emitting element 303 is turned on under the same conditions as FIG.

  The light distribution pattern DL shown in FIG. 5A is formed as a pattern obtained by synthesizing the light distribution patterns DL2, DL1, and DL3 in FIGS. 5B, 5C, and 5D. It has become. Therefore, it can be distributed over a wide range with substantially uniform illuminance in the horizontal direction.

(Embodiment 2)
In Embodiment 1, the vehicular lamp 10 of the present invention is configured as a cornering lamp. However, the present invention is not limited to this. For example, it can be configured as a low beam lamp.
In this case, by cutting off the upper surface of the shade 16 into a predetermined shape, a light distribution pattern DL1 having a cutoff line CL is obtained by the light from the reflector 361 as shown in the light distribution pattern of FIG. The light distribution pattern DL2 is obtained by the light and the light distribution pattern DL3 is obtained by the light from the reflector 363.

(Embodiment 3)
The vehicular lamp according to each of the embodiments described above has been described as including the shade 16, but it goes without saying that the present invention can also be applied to a vehicular lamp that does not include a shade.
As mentioned above, although this invention was demonstrated using embodiment, it cannot be overemphasized that the technical scope of this invention is not limited to the range as described in the said embodiment. It will be apparent to those skilled in the art that various modifications or improvements can be added to the above-described embodiments. Further, it is apparent from the description of the scope of claims that embodiments with such changes or improvements can also be included in the technical scope of the present invention.

DESCRIPTION OF SYMBOLS 10 ... Vehicle lamp, 12 ... Frame, 12A ... Lens mounting surface, 12B ... Flat surface, 14 ... Lens, 16 ... Shade, 18 ... Circuit board, 20 ... Fastener, 32 ... ... Driving circuit 36... Reflecting member 301... Light emitting element (first light emitting element) 302... Light emitting element (second light emitting element) 303 ....... Light emitting element (third light emitting element) 361. (First reflector), 361R: reflective surface (of reflector 361), 362R: reflective surface (of reflector 362), 363R: reflective surface (of reflector 363), 362: reflector (second reflector), 363 ...... Reflector (third reflector), 381 ...... Optical axis (of reflector 361), 382 ...... Optical axis (of reflector 362), 383 ...... Optical axis (of reflector 363), 401, 4 2,403 ...... cover.

Claims (4)

A vehicle lamp that emits light in a first direction through a lens,
A substrate, a first light emitting element, a second light emitting element, and a third light emitting element disposed on the substrate; a first reflector that reflects light of the first light emitting element toward the lens; and the second light emitting element A second reflector that reflects and emits light from the element toward the lens; and a third reflector that reflects light from the third light emitting element toward the lens;
The second light emitting element, the first light emitting element, and the third light emitting element are arranged in parallel in a second direction orthogonal to the first direction in this order,
The second light emitting element and the third light emitting element are disposed behind the first light emitting element in the first direction,
In the first reflector, the second reflector, and the third reflector, the optical axis of the first reflector, the optical axis of the second reflector, and the optical axis of the third reflector intersect with each other in front of the lens, respectively. A vehicular lamp characterized by being arranged as described above.   2. The vehicular lamp according to claim 1, wherein the first reflector has a reflecting surface area smaller than that of the second reflector and the third reflector.   Each of the first reflector, the second reflector, and the third reflector has a reflecting surface that is a part of a substantially elliptical shape with the first light emitting element, the second light emitting element, and the third light emitting element positioned at the focal point. The vehicular lamp according to claim 1, wherein the vehicular lamp is provided. The optical axis of the second reflector and the optical axis of the third reflector intersect with the optical axis of the first reflector at an angle of 35 ° or less. Vehicle lamp.

Images