JP2015076249A - Vehicular lighting fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicular lighting fixture capable of achieving surface light-emission while using a point light-emitting source.SOLUTION: A fixed side tail lamp 16 includes a fixed side LED 30, a fixed side substrate 32 on which the fixed side LED 30 is mounted, a fixed side reflector 38 for reflecting light from the fixed side LED 30 toward the front of the lighting fixture, and a fixed side second inner lens 36 which transmits the reflected light from the fixed side reflector 38. The fixed side reflector 38 has a reflection surface formed with diffusion steps. The fixed side second inner lens 36 has an incident surface and/or an emission surface formed with diffusion steps with a pitch of 0.5 mm or less.

Description

  The present invention relates to a vehicular lamp, and more particularly to a vehicular lamp using a light source that emits light in the form of dots such as LEDs.

  Conventionally, a vehicular lamp using a semiconductor light emitting element such as an LED as a light source is known. For example, Patent Document 1 discloses a vehicular lamp including an LED and a lens that refracts light emitted from the LED and irradiates the light forward.

JP 2010-177064 A

  The LED usually has a particularly high intensity of light emitted in a direction perpendicular to the light emitting surface. Therefore, in general, a vehicular lamp using an LED has a so-called point light emission in which the LED emitting light in a spot shape is conspicuous. However, in recent years, there is an increasing demand for surface light emission that uniformly emits light on a light emitting surface even in a vehicular lamp using LEDs.

  The present invention has been made in view of such circumstances, and an object thereof is to provide a vehicular lamp that can realize surface light emission while using a point light source.

  In order to solve the above problems, a vehicular lamp according to an aspect of the present invention includes a light source mounting portion for mounting a light source, and a reflector that reflects light from the light source forward of the lamp, wherein a diffusion step is formed. A reflector having a reflecting surface, and an inner lens that transmits light reflected from the reflector and has an entrance surface and / or an exit surface on which a diffusion step having a pitch of 0.5 mm or less is formed. .

  The pitch of the diffusion steps formed on the reflector may be 2 mm or less.

  An additional reflector having a plurality of reflecting surfaces for guiding light from the light source to the reflector may be further provided. Each reflective surface of the additional reflector may be configured to irradiate reflected light to a different area of the reflector.

  An additional inner lens that transmits light directed from the light source to the reflector may be further included, and the additional inner lens may have an entrance surface and / or an exit surface on which a diffusion step having a pitch of 0.5 mm or less is formed.

  ADVANTAGE OF THE INVENTION According to this invention, the vehicle lamp which can implement | achieve surface light emission can be provided, using a point light source.

It is a schematic front view of the rear combination lamp which concerns on embodiment of this invention. It is a horizontal sectional view of the rear combination lamp shown in FIG. FIG. 2 is a vertical sectional view of the rear combination lamp shown in FIG. 1. It is a perspective view of a part of the entrance surface of the inner lens. FIG. 5A is a front view of a part of the inner lens, and FIG. 5B is a cross-sectional view of a part of the inner lens. It is a figure which shows the modification of the step formed in an inner lens.

  Hereinafter, a vehicular lamp according to an embodiment of the present invention will be described in detail with reference to the drawings. In the present specification, when terms indicating directions such as “up”, “down”, “front”, “back”, “left”, “right”, “inside”, “outside”, etc. are used, It means the direction in the posture when the vehicular lamp is mounted on the vehicle.

  FIG. 1 is a schematic front view of a rear combination lamp 100 according to an embodiment of the present invention. FIG. 2 is a horizontal sectional view (XX sectional view) of the rear combination lamp 100 shown in FIG. FIG. 3 is a vertical sectional view (YY sectional view) of the rear combination lamp 100 shown in FIG.

  The rear combination lamp 100 shown in FIG. 1 is disposed on the left and right of the rear part of the vehicle, and the structure is substantially the same on the left and right. Therefore, here, as a representative, the structure of the rear combination lamp disposed on the right side of the vehicle will be described.

  In the present embodiment, the rear combination lamp 100 is composed of a fixed-side lamp unit 102 mounted on the rear part of the vehicle body and a movable-side lamp unit 104 mounted on the trunk lid of the vehicle body. In a state where the rear combination lamp 100 is mounted on the vehicle, the fixed-side lamp unit 102 is fixed to the vehicle body, while the movable-side lamp unit 104 is fixed to the vehicle body as the trunk lid is opened and closed. It can move up and down.

  The fixed-side lamp unit 102 includes a fixed-side lamp body 10 and a fixed-side outer cover 12 that covers the front opening of the fixed-side lamp body 10. The fixed-side lamp body 10 and the fixed-side outer cover 12 form a fixed-side lamp chamber 14 of the fixed-side lamp unit 102. As shown in FIG. 1, a fixed tail lamp 16 and a turn signal lamp 18 are provided in the fixed lamp chamber 14.

  The movable lamp unit 104 includes a movable lamp body 20 and a movable outer cover 22 that covers the front opening of the movable lamp body 20. The movable lamp body 20 and the movable outer cover 22 form a movable lamp chamber 24 of the movable lamp unit 104. As shown in FIG. 1, a movable tail lamp 26 and a backup lamp 28 are provided in the movable lamp chamber 24.

  In the rear combination lamp 100, the structures of the turn signal lamp 18 and the backup lamp 28 are not particularly limited. For example, a reflector-type lamp that reflects light emitted from a light source such as a bulb or LED with a reflector can be used. 2 and 3, the turn signal lamp 18 and the backup lamp 28 are not shown.

  In the rear combination lamp 100 according to this embodiment, the tail lamp includes a fixed tail lamp 16 provided in the fixed lamp unit 102 and a movable tail lamp 26 provided in the movable lamp unit 104. The fixed lamp body 10 and the movable tail lamp 26 are configured as separate lamp units, but are turned on and off in synchronization. In the present embodiment, the fixed-side tail lamp 16 has an L-shaped light emitting surface in a front view, and the movable-side tail lamp 26 has a horizontally long rectangular light emitting surface in a front view. The fixed-side tail lamp 16 and the movable-side tail lamp 26 are arranged so that the light emitting surfaces are continuous in a state where the trunk lid of the vehicle is closed.

  First, the fixed-side tail lamp 16 will be described. The fixed tail lamp 16 includes four fixed LEDs 30 as light sources, a fixed substrate 32 on which the fixed LEDs 30 are mounted, a fixed first inner lens 34, a fixed second inner lens 36, and a fixed reflector. 38.

  In the present embodiment, as shown in FIG. 3, the fixed-side substrate 32 on which the fixed-side LED 30 is mounted is arranged so that the light emitting surface of the fixed-side LED 30 faces obliquely upward in the lower portion 10 a of the fixed-side lamp body 10. Has been placed. The fixed-side LED 30 irradiates light toward the fixed-side reflector 38 located at the rear portion in the fixed-side lamp chamber 14. The lower portion 10a of the fixed-side lamp body 10 is exposed from the fixed-side outer cover 12 in a front view as shown in FIG. 1, but is hidden inside the vehicle body when the vehicle is mounted.

  The fixed-side first inner lens 34 is disposed above the fixed-side LED 30 so that light traveling from the fixed-side LED 30 toward the fixed-side reflector 38 is transmitted. In the present embodiment, the fixed-side first inner lens 34 is arranged so that light from the fixed-side LED 30 is incident obliquely as shown in FIG. A diffusion step for diffusing transmitted light is formed on the incident surface 34 a and / or the emission surface 34 b of the fixed first inner lens 34. In this embodiment, this diffusion step has a pitch of 0.5 mm or less. The light transmitted through the fixed-side first inner lens 34 travels to the fixed-side reflector 38.

  As described above, the fixed-side reflector 38 is located at the rear portion in the fixed-side lamp chamber 14, and reflects light from the fixed-side first inner lens 34 to the front of the lamp. A diffusion step for diffusing reflected light is formed on the reflection surface 38 a of the fixed-side reflector 38. This diffusion step is composed of a grid-like step surface and has a pitch of 2 mm or less.

  The fixed-side second inner lens 36 is disposed in the front part in the fixed-side lamp chamber 14 so as to transmit the reflected light from the fixed-side reflector 38. A diffusion step for diffusing transmitted light is formed on the incident surface 36a and / or the emission surface 36b of the fixed second inner lens 36. In this embodiment, this diffusion step has a pitch of 0.5 mm or less. The light transmitted through the fixed-side second inner lens 36 is irradiated to the front of the lamp through the fixed-side outer cover 12.

  In the fixed-side lamp unit 102 configured as described above, the light emitted from the fixed-side LED 30 diffuses when passing through the fixed-side first inner lens 34. The light diffused by the fixed first inner lens 34 is further diffused when reflected by the fixed reflector 38. Then, the light reflected by the fixed-side reflector 38 is further diffused when passing through the fixed-side second inner lens 36 and is irradiated to the front of the lamp through the fixed-side outer cover 12. As described above, according to the fixed-side lamp unit 102 according to the present embodiment, point light emission by the fixed-side LED 30 is performed by using the fixed-side first inner lens 34, the fixed-side reflector 38, and the fixed-side second inner lens 36. It can be converted to surface emission.

  In the fixed-side lamp unit 102 according to the present embodiment, the fixed-side LED 30 is disposed so as to emit light obliquely upward and rearward of the lamp. Thereby, as shown in FIG. 3, the point light emission of fixed side LED30 cannot be visually recognized from a sight line direction. Further, an extension 40 may be provided above the fixed side LED 30 as shown in FIG. 3 so that the fixed side LED 30 itself cannot be directly recognized.

  Next, the movable side tail lamp 26 will be described. The movable side tail lamp 26 includes a movable first LED 42, a movable second LED 43, a movable first substrate 44 on which the movable first LED 42 is mounted, a movable second substrate 45 on which the movable second LED 43 is mounted, and a movable side. A first reflector 46, a movable second reflector 47, and a movable inner lens 48 are provided.

  In the present embodiment, the movable first substrate 44 on which the movable first LED 42 is mounted is disposed at the left rear end of the lamp in the movable lamp chamber 24 as shown in FIG. The movable second substrate 45 on which the movable second LED 43 is mounted is disposed in front of the lamp relative to the movable first substrate 44.

  The movable first reflector 46 has a plurality of reflecting surfaces. That is, the movable side first reflector 46 has a first reflecting surface 46 a for guiding the light from the movable side first LED 42 to the movable side second reflector 47 and the light from the movable side second LED 43 to the movable side second reflector 47. And a second reflecting surface 46b for guiding. The first reflecting surface 46 a and the second reflecting surface 46 b of the movable side first reflector 46 are configured such that the reflected light is irradiated to different regions of the reflecting surface of the movable side second reflector 47. That is, the first reflecting surface 46a is configured to irradiate light from the movable first LED 42 to the first region 47a close to the light source in the movable second reflector 47, while the second reflecting surface 46b is arranged on the movable side. The second region 47 b far from the light source in the second reflector 47 is configured to be irradiated with light from the movable second LED 43. Note that the first region 47a and the second region 47b may partially overlap each other. In order to realize such light irradiation, in the present embodiment, the first reflecting surface 46a and the second reflecting surface 46b are arranged in two layers in the depth direction of the lamp. That is, as shown in FIG. 2, the second reflective surface 46b is arranged in front of the lamp on the first reflective surface 46a.

  The movable second reflector 47 is located in the rear part of the movable lamp chamber 24 and reflects light from the movable first reflector 46 forward of the lamp. That is, the first region 47a of the reflecting surface of the movable second reflector 47 reflects light from the first reflecting surface 46a forward of the lamp, while the second region 47b of the reflecting surface of the movable second reflector 47 is The light from the second reflecting surface 46b is reflected forward of the lamp. A diffusion step for diffusing the reflected light is formed in the first region 47 a and the second region 47 b of the reflecting surface of the movable second reflector 47. This diffusion step is composed of a grid-like step surface and has a pitch of 2 mm or less.

  The movable inner lens 48 is disposed in the front part in the movable lamp chamber 24 so as to transmit the reflected light from the movable second reflector 47. A diffusion step for diffusing transmitted light is formed on the incident surface 48 a and / or the emission surface 48 b of the movable inner lens 48. In this embodiment, this diffusion step has a pitch of 0.5 mm or less. The light transmitted through the movable inner lens 48 is irradiated forward of the lamp through the movable outer cover 22.

  In the movable-side lamp unit 104 configured as described above, the light emitted from the movable-side first LED 42 and the movable-side second LED 43 is reflected by the first reflecting surface 46a and the second reflecting surface 46b of the movable-side first reflector 46. , Toward the movable side second reflector 47. Here, the light reflected by the first reflecting surface 46 a of the movable side first reflector 46 is applied to the first region 47 a of the movable side second reflector 47 and reflected by the second reflecting surface 46 b of the movable side first reflector 46. The irradiated light is applied to the second region 47 b of the movable second reflector 47. The light applied to the movable second reflector 47 is diffused when reflected by the movable second reflector 47. Then, the light reflected by the movable second reflector 47 is further diffused when passing through the movable inner lens 48, and is irradiated to the front of the lamp through the movable outer cover 22. Thus, according to the movable-side lamp unit 104 according to the present embodiment, point light emission by the movable-side first LED 42 and the movable-side second LED 43 is performed, and the movable-side first reflector 46, the movable-side second reflector 47, and the movable-side inner lens. 48 can be converted into surface emission.

  In the present embodiment, the first reflecting surface 46a and the second reflecting surface 46b of the movable side first reflector 46 are stacked in two stages, so that the reflected light from the first reflecting surface 46a of the movable side first reflector 46 is movable side first. The first region 47 a of the second reflector 47 is irradiated, and the reflected light from the second reflecting surface 46 b of the movable first reflector 46 is irradiated to the second region 47 b of the movable second reflector 47. Since each reflecting surface irradiates light to different areas of the movable side second reflector 47 in this manner, light can be reflected and diffused in a wide area of the movable side second reflector 47, so that the horizontally elongated surface light emission. Is possible. Moreover, in this embodiment, since the two reflective surfaces are stacked in the depth direction of the lamp, the size in the height direction of the lamp can be suppressed.

  Next, an example of diffusion steps formed on the fixed first inner lens 34, the fixed second inner lens 36, and the movable inner lens 48 will be described. FIG. 4 is a perspective view of a part of the incident surface 70 a of the inner lens 70. FIG. 5A is a front view of a part of the inner lens 70, and FIG. 5B is a cross-sectional view of a part of the inner lens 70.

  As shown in FIG. 4 and FIGS. 5A and 5B, a plurality of convex fish-eye steps 72 are formed in a lattice pattern on the incident surface 70 a of the inner lens 70. Each fisheye step 72 has a quadrangular shape in a front view and a convex curved surface in a cross-sectional view. The plurality of fish-eye steps 72 have a function of refracting and diffusing incident light. FIG. 5B shows light rays L1 and L2 that are incident on the incident surface 70a of the inner lens 70 and are emitted from the output surface 70b.

  In the inner lens of the present embodiment, the pitch P of the plurality of fisheye steps 72 is set to 0.5 mm or less. In this embodiment, the pitches in the two orthogonal arrangement directions are the same, but they may be different. By setting the pitch P of the fisheye step to 0.5 mm or less, the incident light to the inner lens can be suitably diffused, so that the conversion from point emission to surface emission can be suitably realized.

  FIG. 6 shows a modification of the steps formed on the inner lens. As shown in FIG. 6, a plurality of convex cylindrical steps 92 may be arranged in a predetermined direction on the incident surface 90 a of the inner lens 90. Alternatively, the concave cylindrical steps may be arranged side by side in a predetermined direction. Also in this case, the plurality of cylindrical steps 92 have a pitch P of 0.5 mm or less. Thereby, since the incident light to the inner lens can be suitably diffused, conversion from point light emission to surface light emission can be suitably realized. A cylindrical step may be formed on the exit surface 90b instead of or in addition to the entrance surface 90a.

  The present invention has been described above based on the embodiment. It should be understood by those skilled in the art that these embodiments are exemplifications, and that various modifications can be made to the combination of each component and each processing process, and such modifications are also within the scope of the present invention.

  DESCRIPTION OF SYMBOLS 10 Fixed side lamp body, 12 Fixed side outer cover, 14 Fixed side lamp chamber, 16 Fixed side tail lamp, 18 Turn signal lamp, 20 Movable side lamp body, 22 Movable side outer cover, 24 Movable side lamp chamber, 26 Movable side tail lamp , 28 Backup lamp, 30 Fixed side LED, 32 Fixed side substrate, 34 Fixed side first inner lens, 36 Fixed side second inner lens, 38 Fixed side reflector, 40 Extension, 42 Movable side first LED, 43 Movable side second LED , 44 Movable side first substrate, 45 Movable side second substrate, 46 Movable side first reflector, 47 Movable side second reflector, 48 Movable side inner lens, 100 Rear combination lamp, 102 Fixed side lamp unit, 104 Possible Side lamp unit.

Claims (4)

A light source mounting portion for mounting a light source;
A reflector that reflects light from the light source forward of the lamp, the reflector having a reflecting surface formed with a diffusion step;
An inner lens that transmits reflected light from the reflector, and an inner lens having an entrance surface and / or an exit surface on which a diffusion step having a pitch of 0.5 mm or less is formed;
A vehicular lamp characterized by comprising:   The vehicular lamp according to claim 1, wherein the pitch of the diffusion step formed on the reflector is 2 mm or less. An additional reflector having a plurality of reflective surfaces for directing light from the light source to the reflector;
3. The vehicular lamp according to claim 1, wherein each of the reflective surfaces of the additional reflector is configured to irradiate reflected light to a different area of the reflector. 4.   It further includes an additional inner lens that transmits light from the light source toward the reflector, and the additional inner lens has an entrance surface and / or an exit surface on which a diffusion step having a pitch of 0.5 mm or less is formed. The vehicular lamp according to any one of claims 1 to 3.

Images