JP2016162589A - Vehicle lamp fitting - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle lamp fitting with improved light utilization efficiency.SOLUTION: A vehicle lamp fitting includes: an outer cover 3 forming a lamp chamber S with a housing 2; a light source 4 provided in the lamp chamber S; a projection lens 6; and an extension 10 which shields at least a part of the lamp chamber. At least a part of a light transmission area 22 which transmits light is provided in a position of the extension 10 which does not overlap with the projection lens 6 in a fore and aft direction when viewed from a front surface of the lamp fitting.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a vehicular lamp.

  From Japanese Patent Application Laid-Open No. H10-228561 and the like, a vehicular lamp provided with an extension that blocks light is known. Members around the light source unit are hidden by the extension, and the appearance design of the vehicular lamp is enhanced.

JP 2007-157624 A

  However, when the extension is provided, a part of the light emitted from the light source is blocked by the extension and is not emitted outside, so that the light use efficiency is lowered.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a vehicular lamp with improved light utilization efficiency.

The vehicular lamp according to the present invention is:
A housing and an outer cover forming a lamp chamber together with the housing;
A light source provided in the lamp chamber;
A projection lens provided in the lamp chamber for projecting light emitted from the light source;
An extension provided near the periphery of the projection lens in the lamp chamber,
The extension is formed with a light transmission region that transmits light, and at least a part of the light transmission region is provided at a position that does not overlap the projection lens in the front-rear direction when viewed from the front of the lamp.

  According to the vehicular lamp according to the present invention, since the light transmission region is provided in the extension, the light emitted from the light source can be emitted to the front of the lamp through the light transmission region. Further, since at least a part of the light transmission area is provided at a position that does not overlap the projection lens in the front-rear direction when viewed from the front of the lamp, the light transmission area passes light that is emitted from the light source and does not enter the projection lens And can be emitted forward of the lamp. For this reason, the vehicle lamp according to the present invention has higher light utilization efficiency than the vehicle lamp using an extension that does not have a light transmission region.

In the vehicle lamp according to the present invention,
A lens holder for holding the projection lens;
The light transmission region may be provided also in the lens holder.

  According to the vehicular lamp according to the present invention, the light blocked by the lens holder out of the light emitted from the light source can be emitted forward of the lamp. For this reason, the light use efficiency of the vehicular lamp is enhanced.

In the vehicle lamp according to the present invention,
At least a part of the extension is provided at a position where light emitted from the light source and traveling toward the outer cover without entering the projection lens passes.
A reflection member that reflects at least a part of the light emitted from the light source toward the light transmission region may be provided in the lamp chamber.

  According to the vehicular lamp according to the present invention, light that is not directly directed from the light source to the light transmission region can be emitted from the light transmission region to the front of the lamp by the reflecting member. Thereby, the utilization efficiency of light can further be improved. Further, at least a part of the extension blocks stray light that is emitted from the light source and is directed to the outer cover without entering the projection lens. According to the vehicular lamp according to the present invention, the light emitted from the light source can be controlled by the reflecting member so that the light can be emitted from the light transmission region to the front of the lamp so as not to be stray light. Light utilization efficiency can be increased.

In the vehicle lamp according to the present invention,
A reflector that reflects the light emitted from the light source toward the projection lens;
A beam shaper that is provided between the reflector and the projection lens and blocks a part of light reflected by the reflector and incident on the projection lens;
The light transmission region may be provided also in the beam shaper.

  According to the vehicular lamp according to the present invention, since the beam shaper is provided with the light transmitting region, the light emitted from the light source blocked by the beam shaper can be emitted forward of the lamp. For this reason, the light use efficiency of the vehicular lamp is enhanced.

In the vehicle lamp according to the present invention,
A reflector that reflects the light emitted from the light source toward the projection lens;
A beam shaper that is provided between the reflector and the projection lens and blocks a part of light reflected by the reflector and incident on the projection lens;
The beam shaper may include a reflection unit that reflects light emitted from the light source toward the light transmission region.

  According to the vehicular lamp according to the present invention, light that is not directly directed from the light source to the light transmission region can be reflected by the reflecting portion toward the light transmission region. Thereby, the utilization efficiency of light can further be improved.

In the vehicle lamp according to the present invention,
A reflector that reflects the light emitted from the light source toward the projection lens;
A beam shaper that is provided between the reflector and the projection lens and blocks a part of light reflected by the reflector and incident on the projection lens;
The beam shaper may include an incident portion on which light emitted from the light source is incident, and an emitting portion that emits light incident from the incident portion toward the light transmission region.

  According to the vehicular lamp according to the present invention, light that is not directly directed from the light source to the light transmission region can be guided to the light transmission region by the incident portion and the emission portion of the beam shaper. Thereby, the utilization efficiency of light can further be improved.

In the vehicle lamp according to the present invention,
The light transmission region may be constituted by a half vapor deposition film provided on a transparent member.

  According to the vehicular lamp according to the present invention, the appearance design of the vehicular lamp can be improved by using the light transmission region formed by the half vapor deposition film.

  ADVANTAGE OF THE INVENTION According to this invention, the vehicle lamp with the utilization efficiency of light improved is provided.

It is a sectional side view of the vehicular lamp which concerns on 1st embodiment of this invention. FIG. 2 is a view showing light rays different from those in FIG. 1 in the vehicle lamp shown in FIG. 1. It is a figure which shows the vehicle lamp which concerns on the modification of FIG. It is a figure which shows the vehicle lamp of 2nd embodiment of this invention. It is a figure which shows the vehicle lamp which concerns on the modification of the vehicle lamp shown in FIG. It is a figure which shows the vehicle lamp which concerns on 3rd embodiment of this invention.

  Hereinafter, an example of an embodiment of a vehicular lamp according to the present invention will be described with reference to the drawings.

<First embodiment>
FIG. 1 is a sectional view of a vehicular lamp 1 according to a first embodiment of the present invention. As shown in FIG. 1, the vehicular lamp 1 includes a housing 2 and an outer cover 3. A lamp chamber S is formed by the housing 2 and the outer cover 3.

  In the lamp chamber S, a light source 4, a light source holder 5, a projection lens 6, a lens holder 7, a reflector 8, a beam shaper 9, and an extension 10 are provided. In the present embodiment, the lens holder 7 and the beam shaper 9 are integrally formed of a transparent acrylic resin.

  The light source 4 is mounted on the light source holder 5. In the present embodiment, an LED (Light Emitting Diode) is mounted on the light source holder 5 with the light emitting surface facing upward as the light source 4. In addition to the LED, a filament bulb, a discharge bulb, an organic EL, an LD (Laser Diode), or the like may be used as the light source 4.

  A heat sink 11 is provided on the upper surface of the rear part of the light source holder 5. A heat radiating fin is provided at the rear of the heat sink 11. The heat sink 11 releases heat generated in the light source 4 into the lamp chamber S.

  The reflector 8 is attached to the light source holder 5 so as to cover the upper side of the light source 4. The reflector 8 reflects the light emitted from the light source 4 toward the projection lens 6. In the present embodiment, the reflector 8 includes a main reflection surface 81 made of a substantially spheroidal surface. The first focal point of the ellipse is located at the light source 4, and the second focal point is located at the ridgeline of the beam shaper 9. Further, an additional reflection surface 82 is provided at the front end of the main reflection surface 81.

  The projection lens 6 is provided in front of the light source 4. The projection lens 6 is supported by the lens holder 7. The projection lens 6 emits the reflected light from the reflector 8 toward the front of the lamp. The projection lens 6 is provided such that its rear focal point is located on the ridge line of the beam shaper 9.

The lens holder 7 is attached to the light source holder 5. The front portion of the lens holder 7 has a cylindrical shape and supports the projection lens 6. The lens holder 7 is made of a transparent resin. In the present embodiment, the entire lens holder 7 is a light transmission region 72 that transmits light. For example, the lens holder 7 can be made of a transparent resin such as an acrylic resin, or a transparent inorganic material such as glass or TiO ₂ .

  The beam shaper 9 is provided between the reflector 8 and the projection lens 6. The beam shaper 9 includes a transparent member such as a transparent acrylic resin and a metal deposition film 91 provided on the upper surface thereof. The vapor deposition film 91 blocks part of the light reflected from the reflector 8 toward the projection lens 6. Thereby, a part of the light projected from the projection lens 6 to the front of the lamp is missing, and a desired light distribution pattern is formed in front of the lamp.

The extension 10 is provided in the vicinity of the periphery of the projection lens 6 in the lamp chamber S. The extension 10 is made of a transparent resin. For example, the extension 10 can be made of a transparent resin such as an acrylic resin, or a transparent inorganic material such as glass or TiO ₂ .

  A light shielding element 21 is provided on a part of the surface of the extension 10. The light shielding element 21 of the extension 10 shields at least a part of the lamp chamber S. In the present embodiment, the light shielding element 21 shields the lower part of the light source holder 5 and the upper part of the housing 2 when viewed from the front of the lamp. In the present embodiment, the light shielding element 21 is a metal half-deposited film. The appearance design of the vehicular lamp 1 is enhanced by the half vapor deposition film.

  The extension 10 is provided with a light transmission region 22 that transmits light. In the present embodiment, a region that is not the light shielding element 21 in the extension 10 corresponds to the light transmission region 22. At least a part of the light transmission region 22 is provided at a position that does not overlap the projection lens 6 in the front-rear direction when viewed from the front of the lamp. In the present embodiment, when viewed from the front of the lamp, the light transmission region 22 is provided at a position overlapping with a part of the lower part of the light source holder 5 and a part of the upper part of the housing 2 in the front-rear direction.

Next, the optical path of the light emitted from the light source 4 will be described.
As described above, a part of the light emitted from the light source 4 is reflected toward the projection lens 6 by the reflector 8 and emitted from the projection lens 6 toward the front of the lamp. The beam shaper 9 blocks a part of the reflected light from the reflector 8 so that the light emitted from the projection lens 6 forms a desired light distribution pattern.
As described above, most of the light emitted from the light source 4 is emitted in front of the lamp via the projection lens 6 as described above, but a part of the light emitted from the light source 4 does not enter the projection lens 6. .

  As shown in FIG. 1, a part L1 of the light emitted from the light source 4 passes through the space between the beam shaper 9 and the reflector 8 and passes above the projection lens 6. Further, the light L1 passes through the light transmission region 22 of the extension 10 and is emitted to the front of the lamp through the outer cover 3.

  Further, as shown in FIG. 1, another part L <b> 2 of the light emitted from the light source 4 is incident on the additional reflection surface 82 of the reflector 8. The additional reflection surface 82 reflects incident light toward the light transmission region 22 of the extension 10. The light emitted from the light source 4 cannot directly reach the light transmission region 22 located below the projection lens 6. However, the additional reflection surface 82 can guide the light emitted from the light source 4 to the light transmission region 22 located below the projection lens 6. For this reason, the light use efficiency is enhanced by the additional reflection surface 82 that reflects the light emitted from the light source 4 toward the light transmission region 22 of the extension 10.

  FIG. 2 is a view showing a light beam L3 different from that in FIG. 1 in the vehicle lamp 1 shown in FIG. As shown in FIG. 2, a part L3 of the light emitted from the light source 4 passes through the space between the reflector 8 and the beam shaper 9, passes through the transparent lens holder 7, and passes through the space above the projection lens 6. To do. The light L3 is further reflected toward the heat sink 11 by the light shielding element 21 of the extension 10 provided above the projection lens 6. The light L3 is reflected by the front surface of the heat sink 11 and is emitted forward of the lamp through the lens holder 7, the light transmission region 22 of the extension 10, the projection lens 6, and the outer cover 3. In this way, the front surface of the heat sink 11 is irradiated with the light emitted from the light source 4 and the front surface of the heat sink 11 is visually recognized from the front of the lamp. For this reason, the designability of the vehicular lamp 1 at the time of lighting is enhanced.

  2 shows an example in which the light shielding element 21 of the extension 10 provided above the projection lens 6 reflects the light L3 emitted from the light source 4 toward the heat sink 11, but the present invention is not limited thereto. Absent. FIG. 3 is a diagram for explaining a modification of FIG. For example, as shown by a light beam L4 in FIG. 3, the light shielding element 21 of the extension 10 provided above the projection lens 6 may reflect the light L4 emitted from the light source 4 toward the front end surface of the reflector 8. Good. The light L4 enters the front end surface of the reflector 8, and at least a part of the light is emitted forward of the lamp through the lens holder 7 and the light transmission region 22 of the extension 10. Thus, the upper surface of the reflector 8 is irradiated with the light emitted from the light source 4, and the upper surface of the reflector 8 is visually recognized from the front of the lamp. For this reason, the designability of the vehicular lamp 1 at the time of lighting is enhanced.

<Effect>
As described above, according to the vehicular lamp 1 according to the present embodiment, since the light transmission region 22 is provided in the extension 10, the light emitted from the light source 4 is transmitted through the light transmission region 22 to the front of the lamp. Can be emitted. Further, since at least a part of the light transmission region 22 is provided at a position that does not overlap the projection lens 6 in the front-rear direction when viewed from the front of the lamp, the light transmission region 22 is emitted from the light source 4 and applied to the projection lens 6. Non-incident light can be transmitted and emitted forward of the lamp. For this reason, the vehicular lamp 1 according to the present embodiment has higher light utilization efficiency than a vehicular lamp that uses an extension that does not have a light transmission region.
Even during the daytime, the design of the vehicular lamp 1 is enhanced by allowing the light transmission region 22 to transmit sunlight to guide the sunlight into the lamp chamber S and to show the members in the lamp chamber S. .
Furthermore, according to the vehicular lamp 1 according to the present embodiment, light is emitted from the light transmission region 22 to the front of the lamp, so that light is emitted from other than the projection lens 6 when the vehicular lamp 1 is viewed from the front. Increased area. For this reason, the visibility of the vehicular lamp 1 from the surroundings can be enhanced.

  In the present embodiment, since the lens holder 7 is also made of a transparent resin, the lens holder 7 also has a light transmission region 72 through which light is transmitted. In the present embodiment, the entire lens holder 7 is a light transmission region 72. Unlike the case where the lens holder is formed of an opaque member unlike the present embodiment, according to the present embodiment, the light emitted from the light source 4 via the light transmission region 72 of the lens holder 7 is forwarded to the lamp. Can be emitted. For this reason, the light use efficiency of the vehicular lamp 1 is enhanced.

  In the present embodiment, the light shielding element 21 of the extension 10 is provided at least at a position where the light emitted from the light source 4 and entering the outer cover 3 without entering the projection lens 6 reaches. Further, an additional reflection surface 82 that reflects at least a part of the light emitted from the light source 4 toward the light transmission region 22 is provided in the lamp chamber S.

  The vehicular lamp 1 can also emit light that does not go directly from the light source 4 to the light transmission region 22 from the light transmission region 22 to the front of the lamp by a reflecting member (for example, the additional reflection surface 82). Thereby, the utilization efficiency of light can further be improved. In addition, the light shielding element 21 of the extension 10 blocks light traveling from the light source 4 toward the outer cover 3 without entering the projection lens 6. The light emitted from the light source 4 and entering the outer cover 3 without entering the projection lens 6 may become dazzling light for the driver of the oncoming vehicle. However, according to the vehicular lamp 1 according to the present embodiment, the light emitted from the light source 4 and directly entering the outer cover 3 can be controlled by the reflecting member. According to the vehicular lamp 1 according to the present embodiment, the light emitted from the light source 4 can be controlled by the reflecting member so that the light can be emitted forward from the light transmitting region 22 so as not to be dazzling light. The light utilization efficiency can be increased while blocking dazzling light.

<Second embodiment>
The shape, size, relative positional relationship, and the like of members such as the light source 4, the light source holder 5, the reflector 8, the projection lens 6, and the extension 10 are not limited to the above-described embodiments. For example, an extension having the shape shown in FIG. 4 can be employed. FIG. 4 shows a vehicular lamp 1A according to a second embodiment of the present invention.

  As shown in FIG. 4, in the vehicle lamp 1 </ b> A of the present embodiment, a transparent resin upper extension 10 </ b> A is provided above the projection lens 6, and a transparent resin lower extension 10 </ b> B is provided below the projection lens 6. ing. The upper extension 10A and the lower extension 10B are made of a transparent resin. The upper extension 10A is provided with a light shielding element 21A made of a vapor deposition film. The lower extension 10B is provided with a light shielding element 21B made of a vapor deposition film.

  Also in the vehicular lamp 1 </ b> A of the present embodiment, a part L <b> 5 of the light emitted from the light source 4 passes through the space between the reflector 8 and the beam shaper 9 and passes above the projection lens 6. Further, the light L5 is reflected by the light shielding element 21A of the upper extension 10A, passes through the light transmission region 22 of the upper extension 10A, and is emitted forward of the lamp.

  The other part L6 of the light emitted from the light source 4 is incident on the additional reflection surface 82 of the reflector 8. The additional reflection surface 82 reflects this light L6 toward the lower extension 10B. The light L6 passes below the projection lens 6, is reflected by the light shielding element 21B of the lower extension 10B, passes through the light transmission region 22 of the lower extension 10B, and is emitted forward of the lamp.

  As described above, also in the vehicular lamp 1A according to the present embodiment, the light emitted from the light source 4 is guided to the front of the lamp through the light transmission regions 22 of the upper extension 10A and the lower extension 10B. Has been increased.

  In FIG. 4, the example in which the light shielding element 21 </ b> B of the lower extension 10 </ b> B reflects the emitted light from the light source 4 toward the front of the lamp is described, but the present invention is not limited to this. FIG. 5 shows a vehicular lamp 1D according to a modification of the vehicular lamp 1A shown in FIG. As shown in FIG. 5, the light shielding element 21 </ b> D of the lower extension 10 </ b> D may be configured to reflect the light L <b> 7 emitted from the light source 4 and reflected by the additional reflection surface 82 toward the beam shaper 9. The beam shaper 9 is irradiated with the light L7 emitted from the light source 4. The beam shaper 9 reflects the light L7 toward the front of the lamp through the lens holder 7 and the transmission region 22 of the lower extension 10B. Thereby, the beam shaper 9 is visually recognized from the front of the lamp.

<Third embodiment>
In the above description, an example in which a light transmission region is provided in the extension and the lens holder has been described, but a light transmission region may be provided in the beam shaper. FIG. 6 is a view showing a vehicular lamp 1C according to the third embodiment of the present invention. As shown in FIG. 6, a vapor deposition film 91 that blocks light is formed on the ridgeline of the beam shaper 9 made of a transparent resin, and the other region of the beam shaper 9 is a light transmission region 92 that transmits light.

  The beam shaper 9 has an incident part 93 on which light emitted from the light source 4 is incident, and an emitting part 94 that emits light incident on the incident part 93. In the present embodiment, the front surface of the beam shaper 9 is an emission portion 94. The incident portion 93 is provided on the upper surface of the beam shaper 9. The upper surface of the beam shaper 9 has a step shape in which the front part is higher than the rear part. A step surface on the upper surface of the beam shaper 9 is an incident portion 93.

  The emission unit 94 of the beam shaper 9 emits the light guided inside the beam shaper 9 toward the light transmission region 22 of the projection lens 6 or the extension 10. The light emitting portion 94 may be provided with steps composed of a plurality of irregularities, wrinkles, and lens elements.

  Part of the light emitted from the light source 4 is reflected by the main reflection surface 81 of the reflector 8 and enters the incident portion 93 of the beam shaper 9. The light L8 incident on the beam shaper 9 is emitted from the emission unit 94 toward the front of the lamp while being guided inside the beam shaper 9. Thereby, the front surface of the beam shaper 9 can be illuminated, and the light use efficiency is enhanced.

  In this way, light that does not directly go from the light source 4 to the light transmission regions 22, 72, and 92 can be emitted from the light transmission region 22 to the front of the lamp by the incident portion 93 and the emission portion 94 of the beam shaper 9. Thereby, the light utilization efficiency of the vehicular lamp 1C is further enhanced.

  Further, in the vehicular lamp 1 </ b> C according to the present embodiment, the beam shaper 9 includes a reflection portion 95 that reflects a part L <b> 9 of the light emitted from the light source 4 toward the light transmission region 22 of the extension 10. Light that does not go directly from the light source 4 to the light transmission region 22 can also be emitted from the light transmission region 22 to the front of the lamp by the reflection unit 95. Thereby, the light utilization efficiency of the vehicular lamp 1C is further enhanced.

  Although the present invention has been described with reference to the first to third embodiments, the present invention is not limited to the above-described example. For example, in the above-described embodiment, the example in which the light transmission region is configured by the transparent resin has been described. However, the light transmission region may be configured as a hole provided in the extension 10, the lens holder 7, or the light source holder 5.

  Alternatively, the light transmission region may be provided in a region where the light emitted from the light source 4 does not reach. The light transmission region can enhance the design of the vehicular lamp by guiding sunlight into the lamp chamber and showing the interior of the lamp chamber S even when it is not lit.

  The light transmission region may have a transmittance of 90% or more. Or you may comprise a light transmissive area | region with the half vapor deposition film which has the transmittance | permeability of 30% or more. Alternatively, the light transmission region may transmit only light having a specific wavelength. The light transmission region referred to in the present invention refers to a region having a visible light transmittance lower than that of the light shielding element.

  In the above-described embodiment, an example in which the extension is made of a transparent resin has been described. However, the extension may be made of an opaque resin. A part of the extension made of an opaque resin may be made of a transparent resin, or a hole may be provided to provide a light transmission region.

  In the above-described embodiment, a so-called PES type vehicle lamp has been described as an example. However, the present invention can also be applied to a monofocus type vehicle lamp.

1, 1A, 1B, 1C Vehicle lamp 2 Housing 3 Outer cover 4 Light source 5 Light source holder 6 Projection lens 7 Lens holder 8 Reflector 9 Beam shaper 10 Extension 10A Upper extension 10B Lower extension 11 Heat sink 21 Light blocking element 22 Light transmitting area 72 Light transmitting area 72 81 Main Reflective Surface 82 Additional Reflective Surface 91 Deposition Film 92 Light Transmission Area 93 Incident Portion 94 Emitter Portion 95 Reflector Portion S Lamp Room

Claims (7)

A housing and an outer cover forming a lamp chamber together with the housing;
A light source provided in the lamp chamber;
A projection lens provided in the lamp chamber for projecting light emitted from the light source;
An extension provided near the periphery of the projection lens in the lamp chamber,
The extension includes a light transmission region that transmits light, and at least a part of the light transmission region is provided at a position that does not overlap the projection lens in the front-rear direction when viewed from the front of the lamp. . A lens holder for holding the projection lens;
The vehicular lamp according to claim 1, wherein the light transmission region is also provided in the lens holder. At least a part of the extension is provided at a position where light that is emitted from the light source and enters the outer cover without entering the projection lens reaches.
The vehicular lamp according to claim 1, wherein a reflection member that reflects at least a part of light emitted from the light source toward the light transmission region is provided in the lamp chamber. A reflector that reflects the light emitted from the light source toward the projection lens;
A beam shaper that is provided between the reflector and the projection lens and blocks a part of light reflected by the reflector and incident on the projection lens;
The vehicular lamp according to any one of claims 1 to 3, wherein the light transmission region is also provided in the beam shaper. A reflector that reflects the light emitted from the light source toward the projection lens;
A beam shaper that is provided between the reflector and the projection lens and blocks a part of light reflected by the reflector and incident on the projection lens;
5. The vehicular lamp according to claim 1, wherein the beam shaper includes a reflection portion that reflects light emitted from the light source toward the light transmission region. 6. A reflector that reflects the light emitted from the light source toward the projection lens;
A beam shaper that is provided between the reflector and the projection lens and blocks a part of light reflected by the reflector and incident on the projection lens;
6. The beam shaper according to claim 1, wherein the beam shaper includes an incident portion where light emitted from the light source is incident, and an emitting portion that emits light incident from the incident portion toward the light transmission region. The vehicle lamp according to one item.   The vehicular lamp according to any one of claims 1 to 6, wherein the light transmission region includes a half vapor deposition film provided on a transparent member.

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