JP5630360B2 - Vehicle lighting - Google Patents

Description

  The present invention relates to a vehicular lamp using a semiconductor-type light source as a light source.

  This type of vehicular lamp is conventionally known (for example, Patent Document 1). Hereinafter, a conventional vehicle lamp will be described. A conventional vehicular lamp includes an LED lamp and a reflection surface that reflects light from the LED lamp in a predetermined direction.

  In such a vehicular lamp, it is important to prevent light from the LED lamp from entering a portion (part) other than the reflecting surface.

JP 2003-123517 A

  The problem to be solved by the present invention is that it is important to prevent the light from the semiconductor-type light source from entering a portion (part) other than the reflecting surface.

The present invention (the invention according to claim 1) includes a semiconductor light source, a heat radiating member to which the semiconductor light source is attached, and a reflection that is attached to the heat radiating member and reflects light from the semiconductor light source in a predetermined direction. A reflector having a surface and a light incident range control member having an opening for allowing light from the semiconductor-type light source to enter the reflecting surface, the opening being light emitted from the semiconductor-type light source, the reflecting surface None the size and shape to shield the light incident on portions other than the light incidence range control member is positioned above side than the semiconductor-type light source, the semiconductor-type light source, than the opening of the light incidence range controlling member It is located on the lower side .

The present invention (invention according to claim 2), the front surface of the reflector, though opening is provided, the semiconductor-type light source, than the center of the opening of the light incidence range control member, the front side of the reflector It is characterized by being located.

The present invention (the invention according to claim 3) is characterized in that the reflector and the light incident range control member form an integral structure or a separate structure.

  The vehicular lamp of the present invention (the invention according to claim 1) is light emitted from a semiconductor-type light source, and light passing through the opening of the light incident range control member is incident on the reflecting surface of the reflector. On the other hand, the vehicular lamp according to the present invention (the invention according to claim 1) is light emitted from a semiconductor-type light source, and light that enters a portion (part) other than the reflecting surface of the reflector is a light incident range. It is shielded by the control member. As a result, the vehicular lamp of the present invention (the invention according to claim 1) can reliably prevent the light from the semiconductor-type light source from entering the portion (part) other than the reflecting surface. It is possible to surely prevent stray light from entering the portion (part) other than the reflecting surface.

  In addition, the vehicular lamp according to the present invention (the invention according to claim 1) can be hidden by covering the periphery of the light emitting portion of the semiconductor light source with the peripheral portion of the opening of the light incident range control member. Can be improved.

In the vehicular lamp according to the present invention (the invention according to claim 3 ), the reflector and the light incident range control member have an integral structure, so that the number of parts and the number of assembling steps can be reduced. It can be made cheap.

  In the vehicular lamp according to the present invention (the invention according to claim 3), since the reflector and the light incident range control member have a separate structure, the reflector and the light incident range control member can be easily designed in color and shape. It can be changed and the degree of freedom in design is increased. Moreover, in the vehicular lamp according to the present invention (the invention according to claim 3), the reflector and the light incident range control member have a separate structure, so that different materials can be easily used, and the manufacturing cost can be reduced. It can be made cheap.

FIG. 1 is a perspective view of an essential part in an assembled state showing a first embodiment of a vehicular lamp according to the present invention. FIG. 2 is an exploded perspective view showing the main part of the semiconductor light source, the heat radiating member, the reflector, and the light incident range control member. 3 is also a cross-sectional view taken along line III-III in FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. FIG. 5 is a perspective view of an essential part in an assembled state showing a vehicle lamp according to a second embodiment of the present invention. FIG. 6 is an exploded perspective view showing the main part of the semiconductor-type light source, the heat radiating member, the reflector, and the light incident range control member. FIG. 7 is a sectional view taken along line VII-VII in FIG. FIG. 8 is a longitudinal sectional view (vertical sectional view, sectional view corresponding to FIG. 3 and FIG. 7) of an essential part showing Embodiment 3 of the vehicular lamp according to the present invention. FIG. 9 is a longitudinal sectional view (vertical sectional view, a sectional view corresponding to FIGS. 3 and 7) showing a main part of a vehicle lamp according to a fourth embodiment of the present invention.

  Hereinafter, four examples of embodiments of a vehicular lamp according to the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Description of configuration)
1 to 4 show Embodiment 1 of a vehicular lamp according to the present invention. Hereinafter, the configuration of the vehicular lamp in the first embodiment will be described. In the figure, reference numeral 1 denotes a vehicular lamp in the first embodiment (for example, a vehicle headlamp such as a headlamp or a fog lamp, a front combination lamp, a rear combination lamp, a daytime running lamp, an overhead sign lamp, etc. Lamp).

  The vehicular lamp 1 includes a semiconductor light source 2, a heat radiating member (heat sink member) 3, a reflector 4, a light incident range control member 5, a lamp housing (not shown), and a lamp lens (not shown). And is composed of. The semiconductor light source 2, the heat radiating member 3, the reflector 4, and the light incident range control member 5 constitute a lamp unit. The lamp units 2, 3, 4, 5 are arranged in a lamp chamber (not shown) defined by the lamp housing and the lamp lens via, for example, an optical axis adjusting mechanism (not shown). Yes. In addition to the lamp units 2, 3, 4, and 5, other lamp units such as a fog lamp, a cornering lamp, a clearance lamp, and a turn signal lamp may be disposed in the lamp chamber.

  The semiconductor light source 2 includes a substrate (not shown), a light emitting chip (not shown) provided on the substrate, and a thin rectangular parallelepiped sealing resin member (not shown) for sealing the light emitting chip. ) And. The light emitting chip is formed by arranging a plurality of square chips in the horizontal axis direction. A single rectangular chip may be used.

  The semiconductor light source 2 is mounted on a holder member (base member) 20. The holder member 20 has a connector portion (not shown), and supplies current to the semiconductor-type light source 2 through the connector portion. The holder member 20 is made of a member having insulating properties and high thermal conductivity.

  The heat radiating member 3 is made of, for example, aluminum die casting (aluminum die casting). The heat dissipation member 3 includes an upper horizontal portion 30 and a vertical fin portion 31 extending from the middle portion to the lower portion.

  The semiconductor-type light source 2 is attached to the center of the upper surface of the horizontal portion 30 of the heat radiating member 3 with a screw 6 via the holder member 20. That is, both left and right end portions of the holder member 20 are attached to the upper surface of the horizontal portion 30 of the heat radiating member 3 by the screws 6. Heat generated in the semiconductor-type light source 2 is radiated (emitted) to the outside through the holder member 20 and the heat dissipation member 3.

  The reflector 4 is made of a light impermeable member such as a synthetic resin. The reflector 4 has a shape in which the front surface (front surface) is open and the other surfaces (rear surface (rear surface), flat surface (upper surface), bottom surface (lower surface), and left and right side surfaces) are closed. An opening 40 is provided on the front surface of the reflector 4. A reflector 41 is provided from the flat surface to the back surface of the reflector 4. A bottom portion 42 is provided on the bottom surface of the reflector 4. On both the left and right side surfaces of the reflector 4, left and right standing wall portions 43 are provided.

  On the inner surface of the reflecting portion 41 of the reflector 4, a reflecting surface 44 that reflects light emitted from the semiconductor light source 2 with a predetermined light distribution pattern (not shown) is provided. The reflection surface 44 is an arbitrary surface (free curved surface, paraboloid, hyperboloid, ellipsoid, etc.) that forms a predetermined light distribution pattern, and is subjected to aluminum vapor deposition or silver coating.

  The inner surface of the bottom portion 42 and the inner surface of the standing wall portion 43 of the reflector 4 may be subjected to aluminum vapor deposition or silver coating in the same manner as the reflection surface 44 of the reflection portion 41, or low reflection such as black coating. A layer may be applied, or a light diffusion (light irregular reflection, light dispersion) layer such as knurl or grain may be applied.

  A convex portion 45 is integrally provided on the lower surface of the standing wall portion 43 of the reflector 4. By mounting the convex portion 45 of the reflector 4 on the upper surface of the horizontal portion 30 of the heat radiating member 3, the space between the lower surface of the bottom portion 42 of the reflector 4 and the upper surface of the horizontal portion 30 of the heat radiating member 3. A gap is formed. The height of the gap is substantially equal to or slightly larger than the height of the semiconductor light source 2.

  Attachment piece portions 46 are integrally provided at the left and right end portions of the lower edge portion of the opening 40 on the front surface of the reflector 4 and the rear portion of the reflector 4. The attachment piece 46 of the reflector 4 is attached to the heat radiating member 3 with a screw 6. Thereby, the reflector 4 is attached to the heat radiating member 3.

  The light incident range control member 5 has an integral structure with the reflector 4. That is, the light incident range control member 5 is integral with the bottom portion 42 of the reflector 4. The light incident range control member 5 is provided with an opening 50 through which the light L from the semiconductor light source 2 is incident on the reflection surface 44 of the reflector 4. The opening 50 is light L emitted from the semiconductor-type light source 2 and shields light incident on a portion (part) other than the reflecting surface 44 of the reflector 4, for example, the inner surface of the standing wall 43. In addition, the semiconductor light source 2 has a size and a shape that cover the mounting portions of the screw 6 at both ends of the holder member 20 of the semiconductor light source 2. The light incident range control member 5 integrated with the bottom 42 of the reflector 4 is located above the semiconductor-type light source 2 (on the light emission direction side of the semiconductor-type light source 2). The incident range of light from the light source 2 can be controlled, and the periphery of the semiconductor-type light source 2 can be covered.

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

  The semiconductor-type light source 2 of the vehicular lamp 1 is turned on to emit light. Then, light L is emitted from the semiconductor-type light source 2. The light L passes through the opening 50 of the light incident range control member 5 integrally formed with the bottom 42 of the reflector 4 and enters the reflection surface 44 of the reflector 4. The light L incident on the reflecting surface 44 of the reflector 4 is reflected by the reflecting surface 44. The reflected light L1 is irradiated to the outside of the vehicle with a predetermined light distribution pattern.

  On the other hand, of the light emitted from the semiconductor-type light source 2, the light incident on a portion (part) other than the reflecting surface 44, for example, the standing wall 43 of the reflector 4, is an integrated light incident range with the bottom 42 of the reflector 4. The peripheral edge of the opening 50 of the control member 5 is shielded (cut).

  The heat generated by the light emission of the semiconductor light source 2 is radiated (released) from the semiconductor light source 2 through the holder member 20 to the outside through the horizontal portion 30 and the fin portion 31 of the heat radiating member 3.

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

  The vehicular lamp 1 according to the first embodiment is light emitted from the semiconductor light source 2, and light L passing through the opening 50 of the light incident range control member 5 is incident on the reflection surface 44 of the reflector 4. On the other hand, the vehicular lamp 1 according to the first embodiment is light emitted from the semiconductor-type light source 2, and light that enters the portion (part) other than the reflecting surface 44 of the reflector 4 is a light incident range control member. 5 is shielded. As a result, the vehicular lamp 1 according to the first embodiment can reliably prevent the light from the semiconductor-type light source 2 from being incident on a portion (part) other than the reflection surface 44. It is possible to reliably prevent the light from entering the portion (part) other than the reflection surface 44 and becoming stray light.

  In addition, the vehicular lamp 1 according to the first embodiment is provided around the semiconductor light source 2 by the peripheral edge of the opening 50 of the light incident range control member 5, and the attachment portions of the screws 6 at both ends of the holder member 20. Since it can be covered and blindfolded, the appearance can be improved. That is, as shown by the broken line arrow in FIG. 3, even when the interior of the vehicle lamp 1 in the first embodiment obliquely below the eye point E obliquely above is viewed, the opening 50 of the light incident range control member 5 Since the peripheral portion can cover and cover the mounting portion of the screw 6 of the holder member 20 of the semiconductor-type light source 2, the appearance can be improved.

  In addition, the vehicular lamp 1 according to the first embodiment is configured such that the inner surface of the bottom portion 42 and the inner surface of the standing wall portion 43 of the reflector 4 integrated with the light incident range control member 5 are formed as a low reflection layer such as black paint, or By using a light diffusion (light diffuse reflection, light dispersion) layer such as knurling or grain, light from the semiconductor light source 2 passes through the opening 50 of the light incident range control member 5 and the inner surface of the bottom 42 of the reflector 4 and Even if the light enters the inner surface of the standing wall 43, stray light can be suppressed as much as possible.

  In the vehicular lamp 1 according to the first embodiment, since the bottom portion 42 of the reflector 4 and the light incident range control member 5 form an integral structure, the number of parts and the number of assembling steps can be reduced. It can be made cheap.

(Description of Example 2)
FIGS. 5-7 shows Example 2 of the vehicle lamp concerning this invention. Hereinafter, the vehicular lamp in the second embodiment will be described. In the figure, the same reference numerals as those in FIGS. 1 to 4 denote the same components.

  In the vehicular lamp 1 according to the first embodiment, the bottom portion 42 of the reflector 4 and the light incident range control member 5 form an integral structure. In the vehicle lamp 100 according to the second embodiment, the bottom 42 of the reflector 4 and the light incident range control member 5 form a separate structure. That is, the vehicular lamp 100 of the second embodiment has the same structure of the semiconductor light source 2 and the heat radiating member 3 as the vehicular lamp 1 of the first embodiment, and the reflector 4 and the light incident range control. The structure of the member 5 is different.

  Since the bottom portion 42 of the reflector 4 has a separate structure from the light incident range control member 5, the reflector 42 is positioned above the semiconductor light source 2 to control the incident range of light from the semiconductor light source 2. And it is not necessary to cover the periphery of the semiconductor light source 2. For this purpose, the convex portion 45 of the reflector 4 is eliminated, and the lower surface of the bottom portion 42 of the reflector 4 is directly placed on the upper surface of the horizontal portion 30 of the heat radiating member 3.

  Since the bottom portion 42 of the reflector 4 is directly placed on the horizontal portion 30 of the heat radiating member 3, a window portion 47 is provided in a portion corresponding to the semiconductor light source 2 and the holder member 20 in the bottom portion 42. ing. The semiconductor-type light source 2 and the holder member 20 are exposed from the window portion 47.

  At the left and right ends of the front side (front side) edge of the light incident range control member 5 having a separate structure from the bottom portion 42 of the reflector 4, attachment piece portions 51 are attachment pieces on the front side of the reflector 4. Corresponding to the part 46, it is provided integrally. The attachment piece portion 51 of the light incident range control member 5 is attached to the heat radiating member 3 by a screw 6 together with the attachment piece portion 46 of the reflector 4. Thereby, the reflector 4 and the light incident range control member 5 having a separate structure are attached to the heat radiating member 3.

  Reference numeral “500” in FIGS. 6 and 7 represents a modification of the light incident range control member. The light incident range control member 500 of this modification is narrower than the light incident range control member 5 so that the width can cover and hide the semiconductor light source 2 and the holder member 20. The streamline-shaped convex part designed in (front side) is formed. The light incident range control member 500 of this modification is integrally provided with the mounting piece 51. The light incident range control member 500 of this modification is attached to the heat radiating member 3 together with the reflector 4 via the attachment piece 51.

  Since the vehicular lamp 100 according to the second embodiment is configured as described above, it is possible to achieve substantially the same operational effects as the vehicular lamp 1 according to the first embodiment. In the vehicular lamp 100 according to the second embodiment, the reflector 4 and the light incident range control members 5 and 500 have a separate structure. Therefore, the reflector 4 and the light incident range control members 5 and 500 have a design such as color and shape. Can be easily changed, and the degree of freedom in design is increased. Moreover, in the vehicle lamp 100 of the second embodiment, the reflector 4 and the light incident range control members 5 and 500 have a separate structure, so that different materials can be easily used, and the manufacturing cost is low. Can be.

(Description of Example 3)
FIG. 8 shows Embodiment 3 of the vehicular lamp according to the present invention. Hereinafter, the vehicular lamp in the second embodiment will be described. In the figure, the same reference numerals as those in FIGS. 1 to 7 denote the same components.

  In the vehicular lamp 1 according to the first embodiment, the semiconductor light source 2 is located on the lower side, while the reflecting surface 44 of the reflector 4 is located on the upper side. In the vehicular lamp 101 of the third embodiment, the semiconductor-type light source 2 is located on the upper side, while the reflecting surface 44 of the reflector 4 is located on the lower side.

  Since the vehicular lamp 101 of the third embodiment is configured as described above, it is possible to achieve substantially the same operational effects as the vehicular lamp 1 of the first embodiment. That is, even if the vehicular lamp 101 according to the third embodiment is viewed obliquely below the vehicular lamp 101 according to the third embodiment from the diagonally upper eye point E, as indicated by a broken line arrow in FIG. On the reflection surface 44 of the reflector 4, the bottom surface (top portion) of the reflector 4 and the lower surface (front surface) of the light incident range control member 5, the opening 50, and the semiconductor light source 2 are imprinted. However, the peripheral portion of the opening 50 of the light incident range control member 5 can be covered with the mounting portion of the screw 6 of the holder member 20 of the semiconductor light source 2 so as to be blindfolded, thereby improving the appearance. it can.

  Further, in the vehicular lamp 101 of the third embodiment, the lower surface of the light incident range control member 5 is imprinted on the reflecting surface 44 of the reflector 4, so that the lower surface of the light incident range control member 5 is the same as the reflecting surface 44. Design uniformity can be achieved as aluminum vapor deposition or silver coating, and the degree of freedom in design is increased by applying a different surface treatment such as color and shape to the reflective surface 44.

(Description of Example 4)
FIG. 9 shows Embodiment 4 of a vehicle lamp according to the present invention. Hereinafter, the vehicular lamp in the fourth embodiment will be described. In the figure, the same reference numerals as those in FIGS. 1 to 8 denote the same components.

  In the vehicular lamp 100 according to the second embodiment, the semiconductor-type light source 2 is located on the lower side, while the reflecting surface 44 of the reflector 4 is located on the upper side. In the vehicular lamp 102 of the fourth embodiment, the semiconductor-type light source 2 is positioned on the upper side, while the reflecting surface 44 of the reflector 4 is positioned on the lower side.

  Since the vehicular lamp 102 according to the fourth embodiment is configured as described above, the vehicle lamp 100 according to the second embodiment and the vehicular lamp 101 according to the third embodiment achieve substantially the same operational effects. Can do.

DESCRIPTION OF SYMBOLS 1,100,101,102 Vehicle lamp 2 Semiconductor type light source 20 Holder member 3 Heat radiating member (Heat sink member 30 Horizontal part 31 Fin part 4 Reflector 40 Opening part 41 Reflecting part 42 Bottom part (top part)
43 Standing wall portion 44 Reflecting surface 45 Convex portion 46 Mounting piece portion 47 Window portion 5, 500 Light incident range control member 50 Opening portion 51 Mounting piece portion 6 Screw L Light from semiconductor light source L1 Reflected light from reflection surface E Eye point

Claims (3)

In a vehicular lamp using a semiconductor-type light source as a light source,
A semiconductor light source;
A heat dissipating member to which the semiconductor light source is attached;
A reflector attached to the heat dissipating member and having a reflecting surface that reflects light from the semiconductor-type light source in a predetermined direction;
A light incident range control member having an opening for allowing light from the semiconductor-type light source to enter the reflecting surface;
With
The opening is light emitted from the semiconductor-type light source and has a size and shape that shields light incident on a portion other than the reflective surface.
The light incident range control member is positioned above side of the semiconductor-type light source,
The semiconductor light source is located below the opening of the light incident range control member .
A vehicular lamp characterized by the above. The front of the reflector, an opening is provided,
The semiconductor-type light source is located on the front side of the reflector from the center of the opening of the light incident range control member.
The vehicular lamp according to claim 1. The reflector and the light incident range control member have an integral structure or a separate structure.
The vehicular lamp according to claim 1 or 2 .

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