JP6511960B2 - Vehicle lamp - Google Patents

Description

  The present invention relates to a vehicular lamp including a light guide member and having a plurality of lamp functions.

  There are conventional vehicle lamps of this type (for example, Patent Document 1). Hereinafter, a conventional vehicle lamp will be described. The conventional vehicle lamp includes a first light source emitting light of different colors, for example, white light, a second light source emitting amber color light, and one light guide, and the light guide includes the first light source. A rod-like light guide, a second rod-like light guide, and a planar light guide connecting the first rod-like light guide and the second rod-like light guide are provided.

  In the conventional vehicle lamp, when the first light source is turned on, white light from the first light source enters the first rod-shaped light guide from one end face of the first rod-shaped light guide, and the first rod-shaped light guide A part of the white light incident in the inside was emitted forward from the front surface of the circumferential surface of the first rod-like light guide while being guided in the first rod-like light guide, and was incident into the first rod-like light guide The remainder of the white light is guided into the planar light guide and emerges forward from the front of the planar light guide, whereby the first rod-like light guide and the planar light guide appear white. . On the other hand, when the second light source is turned on, the amber light from the second light source enters the second rod-shaped light guide from one end face of the second rod-shaped light guide and enters the second rod-shaped light guide A portion of the colored light is emitted forward from the front of the circumferential surface of the second rod-shaped light guide while being guided through the second rod-shaped light guide, and the remainder of the amber light incident on the second rod-shaped light guide is The light is guided into the planar light guide and emitted forward from the front surface of the planar light guide, whereby the second rod-like light guide and the planar light guide appear to glow in an amber color. Furthermore, when the first light source and the second light source are simultaneously turned on, the first rod-like light guide appears to glow white, the second rod-like light guide appears to glow amber, and the planar light guide is white It looks like the color mixed with the amber color.

JP, 2014-116142, A

  However, in the conventional vehicle lamp, white light, which causes the first rod-like light guide and the planar light guide to glow in white, is emitted forward from the front of the circumferential surface of the second rod-like light guide, or In some cases, amber-colored light, which is shown by causing the second rod-shaped light guide and the planar light guide to glow in an amber color, may be emitted forward from the front surface of the circumferential surface of the first rod-shaped light guide. That is, from the rod-like light guide of a certain lamp function, light of a color of the lamp function different from the lamp function may be emitted (leaked).

  The problem to be solved by the present invention is that, in a conventional vehicle lamp, light having a lamp function different from the lamp function may be emitted (leaked) from a rod-like light guide of a certain lamp function. It is in.

  According to the present invention (the invention according to claim 1), the lamp housing and the lamp lens for partitioning the lamp chamber, and the first light source, the second light source, and the one light guide member disposed in the lamp chamber, The first light source and the second light source respectively have different lamp functions, and the light guide member is located between the first portion, the second portion, the first portion and the second portion, and the first portion And a third portion to which the second portion is connected, and the first portion includes a first incident surface through which light from the first light source is incident into the first portion, and a first incident surface A first emission surface for emitting the light incident in the first portion to the lamp lens side is provided, and the second portion receives the light from the second light source in the second portion. An incident surface, and a second emission surface for emitting light incident on the second portion from the second incident surface to the lamp lens side; The third portion has a first surface of the surface facing the lamp lens and a second surface of the back surface opposite to the first surface, and the first portion and the third portion are provided. The thickness between the first surface and the second surface in the connection portion with the portion is larger than the thickness between the first surface and the second surface in the connection portion with the second portion and the third portion There is an inclined surface in which the thickness between the first surface and the second surface gradually decreases from the first portion side to the second portion side on at least one of the first surface and the second surface. Are provided.

  According to the present invention (the invention according to claim 2), the light incident from the first light source through the first incident surface into the first portion is emitted light or diffused light, and the light from the second light source passes through the second incident surface. The light incident into the second portion is parallel light or substantially parallel light.

  The present invention (the invention according to claim 3) is characterized in that the light guide member has a substantially U-shaped cross section with one side, each of the first part, the second part, and the third part being one side. .

  This invention (the invention according to claim 4) is characterized in that the first emission surface, the second emission surface, and the first surface face the lamp lens side.

  In this invention (the invention according to claim 5), the second surface reflects the light from the first light source which has entered the third portion from the first portion to the first surface side, and from the first surface side One or more reflecting surfaces to be emitted to the lamp lens side are provided.

  According to the vehicle lamp of the present invention, since the inclined surface is provided on at least one of the first surface and the second surface of the third portion of the light guide member, the first portion to the third portion are provided. When light from the entered first light source is totally reflected at the first surface and the second surface of the third portion, the incident angle of the light from the first light source gradually becomes smaller at the inclined surface of the third portion and becomes critical Become less than a corner. Then, the light from the first light source is emitted from the second surface to the opposite side to the lamp lens. For this reason, the vehicle lamp of the present invention can prevent the light from the first light source, which enters the third portion from the first portion, from being emitted from the second emission surface to the lamp lens side. Thus, in the vehicle lamp according to the present invention, the light from the first light source of the lamp function different from the lamp function is emitted (leaks) from the second emission surface from which the light from the second light source of the lamp function is emitted. You can prevent that. That is, as in the conventional vehicle lamp, it is possible to prevent light having a lamp function different from the lamp function from being emitted (leakage) from the rod-like light guide portion (second exit surface) of the certain lamp function. .

FIG. 1 is a partial cross-sectional view (sectional view taken along line I-I in FIG. 2) showing an embodiment of a vehicle lamp according to the present invention. FIG. 2 is a front view showing a vehicle (not shown) equipped. FIG. 3 is a front view showing main components (a first light source, a second light source, a third light source, and a light guide member). FIG. 4 is a partial cross-sectional view (cross-sectional view taken along line IV-IV in FIG. 3) showing the light guide member and the reflection member of the main component. FIG. 5 is a front view showing light emission states of the tail lamp function, the stop lamp function, the tail lamp and the stop lamp function. FIG. 6 is a front view showing light emission states of the turn signal lamp function and the backup lamp function. FIG. 7 is a partial schematic cross-sectional explanatory view showing the light guide member of the main component and the light path in the light guide member.

  Hereinafter, an example of an embodiment of a vehicle lamp according to the present invention will be described in detail based on the drawings. The present invention is not limited by this embodiment. In this specification, front, back, top, bottom, left and right are front, back, top, bottom, left and right when the vehicle lamp according to the present invention is mounted on a vehicle. In addition, hatching of the cross section of the light guide member is omitted in FIGS. 4 and 7.

(Description of the configuration of the embodiment)
The configuration of the vehicle lamp according to this embodiment will be described below. In FIG. 1, the code | symbol 1 is a vehicle lamp concerning this embodiment. The vehicle lamp 1 is, for example, a rear combination lamp having a plurality of different lamp functions such as a tail lamp, a stop lamp, a tail stop lamp, a turn signal lamp, and a backup lamp. In FIG. 4, the symbol H-V is the direction in which the plurality of lamp function lights L 1, L 2 and L 3 emitted from the vehicle lamp 1 aim at the intersection of the horizontal line and the vertical line of the screen (not shown) (The direction indicated by the small black circle in FIG. 4). The direction H-V (hereinafter, referred to as "H-V direction") is parallel to or substantially parallel to an axis in the front-rear direction of the vehicle (number line in the front-rear direction).

(Description of the vehicle lamp 1)
The vehicle lamp 1 is mounted on the left and right sides of the rear of a vehicle (not shown). The design surfaces on the left and right sides of the rear of the vehicle are composed of three-dimensional curved surfaces. Hereinafter, the left vehicle lamp 1 mounted on the left side of the rear of the vehicle will be described. The right-hand vehicle lamp (not shown) mounted on the right of the rear of the vehicle has the same configuration as the left-hand vehicle lamp 1 with the other configuration substantially the same as that of the left-hand vehicle lamp 1, and therefore the description is omitted.

  As shown in FIG. 1, the vehicular lamp 1 includes a lamp housing 10, a lamp lens (outer lens, transparent lens) 11, an inner panel (inner housing) 12, a first light source 21, and a second light source. 220, 221, a third light source 23, one light guide rod (light guide) 24, one light guide member 3, a reflection member 4, and a Fresnel lens 40.

(Description of the lamp housing 10, the lamp lens 11, and the inner panel 12)
The lamp housing 10 is composed of a light impermeable member. The lamp housing 10 is open from the front to the side (the rear side to the side in this example, the left side in this example), and from the rear to the opposite side (the side from the front to the opposite side in the example to the right) And the lower surface (upper and lower sides of the vehicle) form a closed hollow shape.

  The lamp lens 11 is composed of a light transmitting member. The lamp lens 11 is open from the back surface to the side surface (the front side of the vehicle from the side in this example, to the right) and the upper and lower surfaces (the upper and lower surfaces of the vehicle) are open. The opposite side has a hollow shape closed towards the left). The design surface of the closed portion of the lamp lens 11 is formed of a three-dimensional curved surface along the left and right design surfaces of the rear of the vehicle.

  The opening edge of the lamp housing 10 and the opening edge of the lamp lens 11 are fixed. Thus, the lamp chamber 13 is partitioned. In the lamp chamber 13, the inner panel 12, the first light source 21, the second light source 220, 221, the third light source 23, the light guide bar 24, the light guide member 3, the reflection member 4, The Fresnel lenses 40 are respectively housed and arranged.

  The inner panel 12 is composed of a light impermeable member. The inner panel 12 is light from the first light source 21, the second light sources 220 and 221, the third light source 23, and the light guide rod 24, and is in the HV direction or substantially in the HV direction. The light (not shown) other than the lights L 1, L 2 and L 3 applied to the lamp is prevented from being emitted (leaked) from the lamp lens 11 to the outside. In the light chamber 13, a mounting member (a holding member) such as a mounting bracket (not shown), an inner lens, and other lamp units are housed and arranged.

  The inner panel 12, the first light source 21, the second light sources 220 and 221, the third light source 23, the light guide bar 24, the light guide member 3, the reflection member 4, the Fresnel lens 40, etc. The lamp housing 10 is mounted via a mounting member.

(Description of the first light source 21, the second light sources 220 and 221, and the third light source 23)
The first light source 21, the second light sources 220 and 221, and the third light source 23 are self-emitting semiconductor type light sources such as LEDs, OELs or OLEDs (organic EL) in this example. The light sources 21, 220, 221, and 23 each include a light emitting unit and a substrate. The light sources 21, 220, 221, 23 have different lamp functions.

  The first light source 21 is a light source having a tail lamp function. The first light sources 21 are disposed so as to be opposed to the incident surfaces 240 on both end surfaces of the light guide bar 24 one by one. The first light source 21 emits the white light L1 (see solid arrows in the figure). The first light source 21 may be disposed so as to face the light incident surface 240 at one end face of the light guide rod 24.

  The second light sources 220 and 221 are a light source having a turn signal lamp function and a light source having a backup lamp function. A plurality of the second light sources 220 of the turn signal lamp function are disposed to be opposed to each other in a plurality from the upper portion to the middle portion of the second incident surface 320 of the second portion 32 of the light guide member 3 in this example. The second light source 220 of the turn signal lamp function emits the amber-colored light L2 (see dashed-dotted arrow in the figure). The number of second light sources 220 is not particularly limited.

  A plurality of the second light sources 221 having a backup lamp function are disposed to face the lower portion of the second incident surface 320 of the second portion 32 of the light guide member 3 in the present embodiment. The second light source 221 of the backup lamp function is the white light L2 (in the figure, like the amber light L2 emitted from the second light source 220 of the turn signal lamp function, see the dashed dotted arrow) Emit The number of second light sources 221 is not particularly limited.

  The third light source 23 is a light source of a stop lamp function. A plurality of the third light sources 23 are disposed so as to face each other on the incident surface 400 on one surface of the Fresnel lens 40 in this example. The third light source 23 emits the white light L3 (see the broken arrow in the figure). The number of third light sources 23 is not particularly limited.

(Description of light guide bar 24)
The light guide rod 24 utilizes total internal reflection (internal reflection) inside of the light L1 from the first light source 21 to make the light incident surface 240 from the light incident surface 240 of one end surface to the light incident surface 240 of the other end surface. Leading to the In the example, the light guide rod 24 is made of a transparent resin material such as acrylic resin, PC (polycarbonate), PMMA (polymethyl methacrylate, methacrylic resin) or the like.

  As shown in FIGS. 1 and 3, the light guide bar 24 has a cross section that is equivalent or substantially equivalent from the light incident surface 240 of one end face to the light incident surface 240 of the other end face (longitudinal direction of the light guide bar 24 A cross section perpendicular to or substantially perpendicular to the light guide direction) has a circular cylindrical shape, that is, a round bar shape. Further, as shown in FIG. 3, the light guide rod 24 has a substantially U-shape in a front view, which includes an upper horizontal portion, an intermediate vertical portion and a lower horizontal portion.

  The light incident surfaces 240 are respectively provided on both end surfaces of the light guide rod 24. On the side surface of the light guide bar 24, an emission surface 241 is provided for emitting the light L1 incident on the light guide bar 24 radially or diffusely from the inside of the light guide bar 24 to the outside. A reflective surface 242 for reflecting the light L1 incident on the light guide bar 24 into the light guide bar 24 is provided on the side of the light guide bar 24 opposite to the light emitting surface 241. The light guide rod 24 is disposed such that the emission surface 241 of the light guide rod 24 faces the first incident surface 310 of the first portion 31 of the light guide member 3. The light guide rod 24 may be provided with the incident surface 240 at one end surface.

(Description of light guide member 3)
The light guide member 3 is a member for guiding the light L1 by utilizing total internal reflection (internal reflection) inside, and is a member for transmitting the lights L2 and L3. The light guide member 3 in this example is made of a transparent resin material such as acrylic resin, PC (polycarbonate), PMMA (polymethyl methacrylate, methacrylic resin) or the like. The light guide member 3 is, for example, a lens member.

  The light guide member 3 includes the first portion 31 having a plate shape, the second portion 32 having a plate shape, and the third portion 33 having a plate shape. The third portion 33 is located between the first portion 31 and the second portion 32, and the first portion 31 and the second portion 32 are respectively connected. The first portion 31 and the second portion 32 are inclined with respect to the third portion 33 so as to widen from the third portion 33 to the opposite side of the third portion 33.

  As shown in FIGS. 1, 4 and 7, the light guide member 3 has a substantially U-shaped cross section with the first portion 31, the second portion 32, and the third portion 33 as one side. It is eggplant. The first portion 31 is composed of an outer side wall portion facing the side surface of the lamp lens 11. The second portion 32 includes an inner side wall portion located on the side surface of the lamp lens 11, that is, the opposite side to the first portion 31. The third portion 33 comprises an intermediate front wall portion facing the front of the lamp lens 11.

  The first portion 31, the second portion 32, and the third portion 33 of the light guide member 3 are, as shown in FIG. 2, FIG. 3, FIG. 5, FIG. It has a substantially U-shape in a front view consisting of a lower horizontal portion. The light guide member 3 is a lens member formed of two colors of red transparent and white transparent (colorless transparent). That is, as shown in FIG. 1 and FIG. 4, it is a part from the front part to the middle part of the first part 31 and is opposed to the part from the front part to the middle part of the side surface of the lamp lens 11 The portion 311 and the portion 330 facing the front of the lamp lens 11 of the third portion 33 are red transparent portions. The portions other than the red transparent portions 311 and 330 are white transparent portions.

(Description of the first part 31)
The first portion 31 is provided with the first incident surface 310 and the first emission surface 312, respectively. The first incident surface 310 is provided on the end face of the rear surface of the plate-shaped first portion 31. As shown in FIG. 3, the first incident surface 310 has a substantially U-shape in a front view including an upper horizontal portion, an intermediate vertical portion, and a lower horizontal portion, similarly to the light guide rod 24. The emission surface 241 of the light guide bar 24 is opposed to the first incident surface 310. The first incident surface 310 causes the light L 1 from the first light source 21 to be incident on the first portion 31 via the light guide bar 24. Since the first incident surface 310 is a flat surface or substantially a flat surface, the light L1 emitted radially or diffused from the output surface 241 of the light guide rod 24 is slightly refracted and incident. Thereby, the light L1 from the first light source 21, which is incident on the first portion 31 through the first incident surface 310 via the light guide rod 24, is emitted light or Diffuse light.

  The first emission surface 312 is provided on the end face of the front portion of the plate-shaped first portion 31. The first exit surface 312 faces the front of the lamp lens 11. Similar to the first incident surface 310 and the light guide rod 24, as shown in FIG. 3, the first emission surface 312 has an upper horizontal portion, an intermediate vertical portion, and a lower horizontal portion as viewed from the front. Make a letter shape. On the first exit surface 312, a light diffusing element group, for example, a fisheye prism element group is provided. In FIG. 3, the fisheye prism element group is not shown. The first light emitting surface 312 emits the light L1 incident on the first portion 31 from the first light incident surface 310 toward the lamp lens 11 and in the HV direction or in the HV direction. It is a thing.

  A portion of the first emission surface 312 opposite to the third portion 33 of the first portion 31, that is, a corner portion between the first emission surface 312 and the side surface of the first portion 31 is reflected. A surface 313 is provided. The reflecting surface 313 reflects a part of the light L1 guided in the first portion 31 into the third portion 33 from the first portion 31.

(Description of the second part 32)
The second incident surface 320 and the second emission surface 321 are provided in the second portion 32, respectively. The second incident surface 320 is provided on the end face of the back surface of the plate-shaped second portion 32. As shown in FIG. 3, the second incident surface 320 has a substantially U-shape in a front view that includes an upper horizontal portion, an intermediate vertical portion, and a lower horizontal portion. The light source 220 having six turn signal lamp functions is opposed to a portion from the upper part to the middle part of the second incident surface 320. At the lower part of the second incident surface 320, the light sources 221 of three backup lamp functions are opposed.

  The second incident surface 320 includes the light L2 from the light source 220 of six turn signal lamp functions and the light L2 from the light source 221 of three backup lamp functions into the second portion 32. It is made to inject. Since the second incident surface 320 is formed of a paraboloid or a hyperbolic surface, the light L2 emitted from the light source 220 having six turn signal lamp functions and the three backup lamp functions may be used. The light L2 emitted from the light source 221 is refracted and incident. Accordingly, the light L2 from the light source 220 of the six turn signal lamp functions and the light L2 from the light source 221 of the three backup lamp functions via the second incident surface 320 The light L2 incident into the second portion 32 is parallel light or substantially parallel light. That is, the light L2 incident into the second portion 32 is parallel or substantially parallel to two planes of the plate-shaped second portion 32.

  The second emission surface 321 is provided on the end face of the front portion of the plate-shaped second portion 32. The second exit surface 321 faces the front of the lamp lens 11. As shown in FIG. 3, the second emission surface 321 has a substantially U-shape in a front view including an upper horizontal portion, an intermediate vertical portion, and a lower horizontal portion, like the second incident surface 320. The second exit surface 321 is provided with a light diffusing element group, for example, a fisheye prism element group. In FIG. 3, the fisheye prism element group is not shown. The second emission surface 321 emits the light L2 incident on the second portion 32 from the second incident surface 320 toward the lamp lens 11 and in the HV direction or in the HV direction. It is a thing.

(Description of the third part 33)
The plate-shaped third portion 33 has a first surface 331 of a surface (one of two planes) facing the lamp lens 11 and a back surface (two planes) opposite to the first surface 331. And the second surface 332 of the other one plane). The second surface 332 is the light L3 from the third light source 23, and is a parallel reflected light (the light L3) transmitted through the Fresnel lens 40 and the second portion 32 and reflected by the reflection member 4 Is made incident on the third portion 33. The third incident surface (hereinafter referred to as "third incident surface") 332, which is the second surface, is a flat surface or a substantially flat surface, so parallel reflected light (the light L3) reflected by the reflection member 4 The light is incident almost as it is. Accordingly, the light L3 reflected from the third light source 23 by the reflecting member 4 and incident on the third portion 33 through the third incident surface 332 is parallel light or substantially parallel light. That is, the light L3 incident into the third portion 33 is perpendicular or almost perpendicular to two planes of the plate-shaped third portion 33.

  The first surface 331 emits the light L3 incident on the third portion 33 from the third incident surface 332 toward the lamp lens 11 and in the HV direction or in the HV direction. 3 is the exit surface. The third emission surface (hereinafter, referred to as “third emission surface”) 331, which is the first surface, is disposed in front of the lamp lens 11 in the same manner as the first emission surface 312 and the second emission surface 321. I'm facing.

  As shown in FIGS. 1, 4 and 7 (E), the light from the first light source 21 which enters the third portion 33 from the inside of the first portion 31 is formed on the third incident surface 332. One or a plurality of reflecting surfaces 333 for reflecting L1 to the third emission surface 331 and emitting the light from the third emission surface 331 to the lamp lens 11 side are provided in the present embodiment. The reflecting surface 333 may not be provided as shown in FIGS. 7 (A), (B) and (D).

(Description of light leakage prevention structure)
The light leakage prevention structure will be described below with reference to FIG. FIG. 7 is a partially schematic cross-sectional explanatory view showing light paths (paths of the lights L1, L2, L3) in the light guiding member 3 and the light guiding member 3. As shown in FIG. In FIG. 7, the illustration of the fisheye prism element group on the first emission surface 312 and the second emission surface 321 is omitted. In FIG. 7 (A), (B), (C), (D), illustration of the said reflective surface 333 of the said 3rd part 33 is abbreviate | omitted.

  In the leak light prevention structure, as shown in FIG. 7C, the light L1 from the first light source 21 is emitted from the second emission surface 321 of the second portion 32 of the light guide member 3 ( To prevent leakage). As shown in FIG. 7B, the thickness T1 between the third emission surface 331 and the third incident surface 332 at the connection portion between the first portion 31 and the third portion 33 is the third thickness. The thickness T2 between the third light emitting surface 331 and the third light incident surface 332 at the connecting portion between the second portion 32 and the third portion 33 is larger.

  The third incident surface 332 is inclined such that the thickness between the third emission surface 331 and the third incident surface 332 gradually decreases from the first portion 31 side toward the second portion 32 side. A face is provided. The inclined surface may be provided on the third emission surface 331, or may be provided on both the third emission surface 331 and the third incident surface 332. The inclined surface may be provided on the entire surface of the third incident surface 332 and the third emission surface 331, or, as shown in FIG. 7E, the third incident surface 332 adjacent to the second portion 32. (The third incident surface 332 between the right reflecting surface 333 and the second portion 32) may be provided.

(Description of the Fresnel lens 40, the reflecting member 4 and the inner panel 12)
The Fresnel lens 40 is disposed between the three third light sources 23 and the second portion 32, as shown in FIG. 1, FIG. 3 and FIG. The incident surface 400 of the Fresnel lens 40 is opposed to the three third light sources 23. An exit surface 401 of the Fresnel lens 40 faces the second portion 32. The Fresnel lens 40 enters the light L 3 emitted from the three third light sources 23 into the Fresnel lens 40 from the incident surface 400 and is perpendicular to the output surface 401 from the output surface 401 or The light is emitted to the side of the second portion 32 as a substantially vertical parallel light.

  The reflection member 4 is disposed to face the third incident surface 332 of the second portion 32 and the third portion 33 as shown in FIGS. 1 and 4. A flat or substantially flat reflective surface 41 is provided on the surface of the second portion 32 of the reflective member 4 and the third incident surface 332 of the third portion 33 facing the third incident surface 332. The reflection surface 41 emits the light L3 as parallel light emitted from the emission surface 401 of the Fresnel lens 40 and transmitted through the second portion 32 as parallel light, and the third incident surface 332 of the third portion 33 Reflect to the side. The reflecting surface 41 has a rectangular shape. The long side of the reflecting surface 41 is slightly shorter than the length of the middle vertical portion of the light guide member 3 in a front view. The short side of the reflecting surface 41 is equal to or substantially the same as the width of the third portion 33 of the light guide member 3 in a front view. The reflecting member 4 and the three third light sources 23 face each other with the second portion 32 interposed therebetween.

  As shown in FIG. 1, the inner panel 12 has a white portion from the middle portion to the back portion of the side surface of the lamp lens 11 and the middle portion to the back portion of the first portion 31 of the light guide member 3. It is disposed between the transparent part. The inner panel 12 emits the light L1 from the first light source 21 which has entered the first portion 31 from the first incident surface 310 of the first portion 31 from the white transparent portion of the first portion 31. It prevents the lamp lens 11 from emitting (leaking) to the outside.

  As shown in FIG. 1, the inner panel 12 is disposed between a portion on the inner side of the vehicle than the light guide member 3 in front of the lamp lens 11 and the third light source 23 and the Fresnel lens 40. It is done. The inner panel 12 prevents the light L3 from the third light source 23 from being emitted (leaked) from the lamp lens 11 to the outside.

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

(Description of lighting of the tail lamp)
The two first light sources 21 are turned on. Then, the light L 1 emitted from the first light source 21 enters the light guide bar 24 from the incident surfaces 240 at both ends of the light guide bar 24. The light L1 incident on the light guide bar 24 passes through the light guide bar 24 from one incident surface 240 to the other incident surface 240, and conversely from the other incident surface 240 to the one incident surface 240, It is guided while repeating total reflection.

  The light L1 guided in the light guide rod 24 is reflected by the reflection surface 242 of the light guide rod 24 toward the emission surface 241 and emitted from the emission surface 241 to the outside, and the first portion of the light guide member 3 The light is incident on the first portion 31 from the first incident surface 310 of 31. The light L1 that has entered the first portion 31 is guided through the first portion 31 from the first incident surface 310 to the first exit surface 312 while being repeatedly totally reflected.

  Part of the light L1 guided in the first portion 31 is emitted from the first emission surface 312 of the red transparent portion 311 to the front side of the lamp lens 11 and in the HV direction or substantially the HV direction, The light is emitted from the front of the lamp lens 11 to the outside of the vehicle as red light. The rest of the light L1 guided in the first portion 31 is reflected by the reflective surface 313 of the first portion 31 toward the third portion 33 of the light guide member 3 and enters the third portion 33, or It directly enters the third portion 33.

  The light L1 incident into the third portion 33 is guided through the third portion 33 while repeating total reflection from the first portion 31 to the second portion 32 side. A part of the light L1 guided in the third portion 33 is reflected by the reflection surface 333 of the third portion 33 toward the third emission surface 331, and the lamp lens from the third emission surface 331 of the red transparent portion 330 The light is emitted to the front side of the lamp 11 and in the HV direction or substantially the HV direction, and is emitted from the front of the lamp lens 11 to the outside of the vehicle as red light. The remainder of the light L1 guided in the third portion 33 is emitted from the third incident surface 332 of the third portion 33 to the outside opposite to the lamp lens 11.

  Thereby, when the vehicle lamp 1 is viewed from the front (rear side of the vehicle), as shown in FIG. 5A, three U-shaped lines of red light of the tail lamp function (FIG. 5A) See the three shaded lines in the figure). The three U-shaped lines of red light correspond to one first emission surface 312 of the first portion 31 and two reflection surfaces 333 of the third portion 33.

(Description of lighting of stop lamp)
The three third light sources 23 are turned on. Then, the light L 3 emitted from the third light source 23 enters the Fresnel lens 40 from the incident surface 400 of the Fresnel lens 40. The light L3 that has entered into the Fresnel lens 40 exits from the exit surface 401 of the Fresnel lens 40 as parallel light.

  The light L3 emitted as parallel light from the exit surface 401 of the Fresnel lens 40 passes through the second portion 32 of the light guide member 3 as it is, and the third portion 33 of the light guide member 3 is reflected by the reflection surface 41 of the reflection member 4. It reflects as parallel light on the third incident surface 332 and the reflecting surface 333 side.

  The light L 3 reflected as parallel light by the reflecting surface 41 of the reflecting member 4 is incident on the third portion 33 from the third incident surface 332 and the reflecting surface 333 of the third portion 33. The light L3 incident into the third portion 33 is transmitted through the third portion 33 and is directed from the third emission surface 331 of the red transparent portion 330 of the third portion 33 to the front side of the lamp lens 11 and in the HV direction Alternatively, the light is emitted substantially in the H-V direction, and is emitted from the front of the lamp lens 11 to the outside of the vehicle as red light.

  Thereby, when the vehicle lamp 1 is viewed from the front (rear side of the vehicle), as shown in FIG. 5 (B), the grid line in the rectangular shaped surface of the red light of the stop lamp function (FIG. 5 (B) See the side where is applied). The rectangular surface of the red light corresponds to the reflection surface 41 of the reflection member 4.

(Description of lighting of the tail stop lamp)
The two first light sources 21 and the three third light sources 23 are simultaneously turned on. Then, as described above, the light L1 from the first light source 21 is transmitted from the first outgoing surface 312 of the red transparent portion 311 of the first portion 31 of the light guiding member 3 and the red transparent of the third portion 33 of the light guiding member 3 The light is emitted from the third emission surface 331 of the portion 330 as red light. The light L3 from the third light source 23 is emitted as red light from the third emission surface 331 of the red transparent portion 330 of the third portion 33 of the light guide member 3. Thereby, when the vehicle lamp 1 is viewed from the front (rear side of the vehicle), as shown in FIG. 5C, three U-shaped lines of red light of the tail lamp function (FIG. 5A) , (C) (see the three hatched lines) and the red light rectangular surface of the stop lamp function (Fig. 5 (B), (C) grid lines are applied See the same side).

(Description of lighting of the turn signal lamp)
The second light source 220 of the six turn signal lamp functions is turned on. Then, the amber light L 2 emitted from the second light source 220 is parallel light in the second portion 32 from the portion from the upper portion to the middle portion of the second incident surface 320 of the second portion 32 of the light guide member 3. Incident as. The light L2 incident into the second portion 32 passes through the second portion 32 as parallel light from the second incident surface 320 to the second exit surface 321 side. The light L2 transmitted through the second portion 32 is emitted from the upper portion to the middle portion of the second emission surface 321 to the front side of the lamp lens 11 and in the HV direction or substantially the HV direction. The light is emitted as amber light from the front of the lens 11 to the outside of the vehicle.

  As a result, when the vehicle lamp 1 is viewed from the front (rear side of the vehicle), as shown in FIG. 6A, the L-shaped line of the upside-down L shape of the amber color light of the turn signal lamp function (FIG. See the hatched line in). The upside-down L-shaped line of the amber light corresponds to the portion from the top to the middle of the second portion 32.

(Description of lighting of backup lamp)
The second light source 221 of the three backup lamp functions is turned on. Then, the white light L 2 emitted from the second light source 221 enters parallel to the second portion 32 from the lower portion of the second incident surface 320 of the second portion 32 of the light guide member 3. The light L2 incident into the second portion 32 passes through the second portion 32 as parallel light from the second incident surface 320 to the second exit surface 321 side. The light L 2 transmitted through the second portion 32 is emitted from the lower portion of the second emission surface 321 to the front side of the lamp lens 11 and in the HV direction or substantially the HV direction. It emits as white light to the outside of the vehicle.

  Thereby, when the vehicle lamp 1 is viewed from the front (rear side of the vehicle), as shown in FIG. 6B, the substantially L-shaped line of white light of the backup lamp function (FIG. 6B). See the hatched line). The substantially L-shaped line of white light corresponds to the lower portion of the second portion 32.

(Description of the effect of the embodiment)
The vehicular lamp 1 according to this embodiment has the above-described configuration and operation, and the advantages thereof will be described below.

  The vehicular lamp 1 according to this embodiment has a third exit surface 331 as a first surface and a third incident surface as a second surface at the connection portion between the first portion 31 and the third portion 33 of the light guide member 3. A thickness T1 between the second portion 32 and the third portion 33 is larger than a thickness T2 between the third emission surface 331 and the third incident surface 332 at the connection portion between the second portion 32 and the third portion 33, and the third The incident surface 332 is provided with an inclined surface in which the thickness between the third emission surface 331 and the third incident surface 332 gradually decreases from the first portion 31 side toward the second portion 32 side. .

  As a result, in the vehicle lamp 1 according to this embodiment, the light L1 from the first light source 21 which enters the third portion 33 from the first portion 31 of the light guide member 3 is the third emission of the third portion 33 When totally reflecting on the surface 331 and the third incident surface 332, the incident angle of the light L1 from the first light source 21 gradually decreases on the inclined surface of the third incident surface 332 of the third portion 33 and becomes less than the critical angle. Become. Then, as shown in FIG. 7B, the light L1 from the first light source 21 is emitted from the third incident surface 332 of the third portion 33 to the outside on the opposite side to the lamp lens 11.

  For this reason, in the vehicle lamp 1 according to this embodiment, the light L1 from the first light source 21 that has entered the third portion 33 from the first portion 31 of the light guide member 3 is the second of the second portion 32. It is possible to prevent emission from the emission surface 321 to the lamp lens 11 side. Thus, as shown in FIGS. 7A and 7B, the vehicle lamp 1 according to this embodiment can be a lamp function, that is, a light from the second light sources 220 and 221 of the turn signal lamp function and the backup lamp function. It is possible to prevent the light L1 from the first light source 21 having a lamp function different from the lamp function, that is, the tail lamp function from the second emission surface 321 of the second portion 32 which L2 emits (leaks). That is, as in the conventional vehicle lamp, it is possible to prevent light having a lamp function different from the lamp function from being emitted (leakage) from the rod-like light guide portion (second exit surface) of the certain lamp function. .

  Here, the thickness T3 between the third emission surface 331 and the third incident surface 332 at the connection portion between the first portion 31 and the third portion 33A of the light guide member 3A, the second portion 32 and the third portion The case where the thickness T4 between the third emission surface 331 and the third incident surface 332 in the connection portion with 33A is equal or approximately equal will be described with reference to FIG. 7C. In this case, as shown in FIG. 7C, the light L1 from the first light source 21 that has entered the third portion 33A from the first portion 31 of the light guiding member 3A is the third portion of the third portion 33A. The light may enter the second portion 32 from within the third portion 33A while being totally reflected by the emission surface 331 and the third incident surface 332 and emit from the second emission surface 321 of the second portion 32 toward the lamp lens 11 . That is, from the second emission surface 321 of the second portion 32 from which the light L2 from the second light source 220, 221 of a certain lamp function and the backup lamp function is emitted, the tail lamp function of the lamp function and different lamp function The light L1 from the first light source 21 of (1) is emitted (leaks).

  On the other hand, since the vehicular lamp 1 according to this embodiment is provided with the inclined surface on the third incident surface 332 of the third portion 33 of the light guide member 3, the first light source 21 is formed by the inclined surface. The incident angle of the light L1 from the light source gradually decreases and becomes less than the critical angle, and the light L1 from the first light source 21 is emitted from the third incident surface 332 to the outside on the opposite side to the lamp lens 11. As a result, the light L1 from the first light source 21 of the tail lamp function is emitted from the second emission surface 321 of the second portion 32 from which the light L2 from the second light source 220, 221 of the turn signal lamp function and the backup lamp function is emitted. It can prevent (leaking).

  In the vehicle lamp 1 according to this embodiment, the light L1 incident on the first portion 31 from the first light source 21 through the first incident surface 310 of the first portion 31 of the light guide member 3 is emitted light or diffused light It is. For this reason, the vehicle lamp 1 according to this embodiment emits the light L1 from the first light source 21 from the first emission surface 312 of the first portion 31 to the lamp lens 11 side, and the inside of the first portion 31 Can be introduced into the third portion 33 and used as light emitted from the third portion 33 to the lamp lens 11 side.

  The vehicle lamp 1 according to this embodiment, as shown in FIGS. 4 and 7A, passes from the second light sources 220 and 221 through the second incident surface 320 of the second portion 32 of the light guide member 3. The light L2 incident into the portion 32 is parallel light or substantially parallel light. For this reason, the vehicular lamp 1 according to this embodiment can emit all or substantially all of the light L2 as parallel light incident into the second portion 32 from the second emission surface 321 to the lamp lens 11 side. , Or all of the light L2 from the second light source 220, 221 can be effectively used.

  Moreover, in the vehicular lamp 1 according to this embodiment, the light L2 as parallel light incident in the second portion 32 is guided from the second portion 32 through the third portion 33 into the first portion 31. It is possible to prevent the radiation (leaking) from the first emission surface 312 of the first portion 31 to the lamp lens 11 side. Thus, the light L2 from the second light sources 220 and 221 of the turn signal lamp function and the backup lamp function is emitted from the first emission surface 312 of the first portion 31 from which the light L1 from the first light source 21 of the tail lamp function is emitted. It can prevent (leaking).

  As shown in FIG. 7D, the light L2 that has entered the second portion 32 from the second light source 220, 221 through the second incident surface 320 of the second portion 32 of the light guide member 3 is emitted light or It may be diffused light. In this case, due to the inclined surface of the third incident surface 332 of the third portion 33 of the light guide member 3, the light L2 from the second light source 220, 221 entering the third portion 33 from within the second portion 32 The incident angle of the light L 2 from the second light source 220, 221 is the inclination of the third incident surface 332 of the third portion 33 when totally reflecting on the third emission surface 331 and the third incident surface 332 of the third portion 33. In the plane, it gradually becomes larger than the critical angle. For this reason, even if the light L2 from the second light source 220, 221 is guided from the third portion 33 into the first portion 31, the light L2 is from the side of the first portion 31 to the side of the lamp lens 11. Can be prevented from being emitted (leaked) from the first emission surface 312 of the first portion 31 to the front side of the lamp lens 11. Thus, the light L2 from the second light sources 220 and 221 of the turn signal lamp function and the backup lamp function is emitted from the first emission surface 312 of the first portion 31 from which the light L1 from the first light source 21 of the tail lamp function is emitted. It can prevent (leaking).

  In the vehicle lamp 1 according to this embodiment, the light guide member 3 has a substantially U-shaped cross section in which the first portion 31, the second portion 32, and the third portion 33 each have one side, The part 31 is provided with a first emission surface 312 for emitting the red light L1 of the tail lamp function, and the second part 32 is the amber light L2 of the turn signal lamp function and the white light of the backup lamp function. A second emission surface 321 for emitting light L2 is provided, and the third portion 33 emits third light L1 for the red light of the tail lamp function and third light 33 for the red light L3 of the stop lamp function. A surface 331 is provided. For this reason, the vehicle lamp 1 according to this embodiment can house the tail lamp, the stop lamp, the tail / stop lamp, the turn signal lamp, and the backup lamp in a compact manner.

  In the vehicle lamp 1 according to this embodiment, the first exit surface 312 and the second exit surface 321 of the light guide member 3 and the third exit surface 331 of the first surface face the front side of the lamp lens 11. For this purpose, in the vehicle lamp 1 according to this embodiment, the light L1 from the first light source 21 of the tail lamp function is directed from the first exit surface 312 and the third exit surface 331 in the HV direction or substantially HV direction. In addition, the light L2 from the second light source 220, 221 of the turn signal lamp function and the backup lamp function is emitted from the second emission surface 321 in the H-V direction or the substantially H-V direction, and further the stop lamp function The light L3 from the third light source 23 is emitted from the third emission surface 331 in the H-V direction or in the substantially H-V direction. For this reason, in the vehicle lamp 1 according to this embodiment, it is easy to design a light distribution pattern of each lamp function, and furthermore, a predetermined light distribution pattern of each lamp function can be obtained.

  In the vehicular lamp 1 according to this embodiment, the third light entrance surface 332 of the second surface of the light guide member 3 receives the light L 1 from the first light source 21 that has entered the third portion 33 from within the first portion 31. One or a plurality of two reflecting surfaces 333 are provided in this example to reflect light from the third light emitting surface 331 to the front side of the lamp lens 11 by reflecting the light to the third light emitting surface 331 of the first surface. For this reason, the vehicular lamp 1 according to this embodiment can effectively utilize the light L1 from the first light source 21 which has entered the third portion 33 from the first portion 31.

  In the vehicle lamp 1 according to this embodiment, the light guide member 3 is formed into a substantially U-shape by two-color molding of red transparent and white transparent (colorless transparent), and the front portion of the first portion 31 of one side And a portion 330 of the front portion of the third portion 33 of one side as a red transparent portion. For this reason, the vehicular lamp 1 according to this embodiment is configured such that the portion 311 of the first portion 31 of the light guide member 3 is viewed from the front and the side of the lamp lens 11 when the first light source 21 and the third light source 23 are off. And the portion 330 of the third portion 33 can be seen, and the design at the time of non-lighting is improved. The light guide member 3 may be formed by forming a white transparent (colorless transparent) single color (single color). In this case, the light L1 from the first light source 21 and the light L3 from the third light source 23 are converted to red light directly or through a red filter.

  The vehicular lamp 1 according to this embodiment obtains the tail lamp function when the two first light sources 21 are lit, and obtains the turn signal lamp function when the six light sources 220 having the turn signal lamp function are lit. When the second light source 221 of the three backup lamp functions is turned on, the backup lamp function is obtained, and when the three third light sources 23 are turned on, the stop lamp function is obtained, and the two first light sources 21 and When the three third light sources 23 are lighted simultaneously, as described above, the tail stop lamp function is obtained. Thus, the vehicular lamp 1 according to this embodiment can obtain five lamp functions. Moreover, since the vehicle lamp 1 according to this embodiment can obtain five lamp functions by one light guide member 3, the number of parts can be reduced, and moreover, the manufacturing cost is low. And weight reduction can be achieved.

(Description of examples other than the embodiment)
In the above embodiment, the rear combination lamp has a tail lamp, a stop lamp, a tail stop lamp, a turn signal lamp, and a backup lamp. However, in the present invention, the lamp function is not particularly limited as long as it has a plurality of lamp functions. In addition, it can be applied to combination lamps such as front combination lamps other than rear combination lamps.

DESCRIPTION OF SYMBOLS 1 Vehicle lamp 10 Lamp housing 11 Lamp lens 12 Inner panel 13 Light room 21 1st light source 220, 221 2nd light source 23 3rd light source 24 Light guide bar 240 Incident surface 241 Output surface 242 Reflective surface 3, 3A Light guide member 31 First Part 310 First Incident Surface 311 Part 312 First Emitting Surface 313 Reflective Surface 32 Second Part 320 Second Incident Surface 321 Second Emitting Surface 33, 33A Third Part 330 Partial 331 Third Output Surface (First Surface)
332 Third entrance surface (second surface)
333 Reflective surface H-V direction L1 Light from the first light source L2 Light from the second light source L3 Light from the third light source T1, T2, T3, T4 Thickness

Claims (5)

A lamp housing and a lamp lens for partitioning the lamp chamber;
A first light source, a second light source, and one light guide member disposed in the lamp chamber;
Equipped with
The first light source and the second light source each have different lamp functions,
The light guide member is located between a first portion, a second portion, and the first portion and the second portion, and the third portion is connected to the first portion and the second portion. Have parts and
In the first portion, there is provided a first incident surface through which light from the first light source is made incident into the first portion, and light incident from the first incident surface into the first portion toward the lamp lens And a first emission surface to be emitted is provided,
In the second portion, a second incident surface for allowing light from the second light source to enter the second portion, and light incident in the second portion from the second incident surface to the lamp lens side And a second emission surface to be emitted is provided,
The third portion has a first surface of the surface facing the lamp lens, and a second surface of the back surface opposite to the first surface,
The thickness between the first surface and the second surface in the connection portion between the first portion and the third portion corresponds to the first surface in the connection portion between the second portion and the third portion Larger than the thickness between the second surface,
In at least one of the first surface and the second surface, the thickness between the first surface and the second surface is gradually increased from the first portion side toward the second portion side. An inclined surface that becomes smaller is provided,
A vehicle lamp characterized in that. The light that has entered the first portion from the first light source via the first incident surface is a radiated light or a diffused light,
The light incident on the second portion from the second light source via the second incident surface is parallel light or substantially parallel light.
The vehicle lamp according to claim 1, characterized in that: The light guide member has a substantially U-shaped cross section with one side of each of the first portion, the second portion, and the third portion.
The vehicle lamp according to claim 1 or 2, characterized in that: The first emission surface, the second emission surface, and the first surface face the lamp lens.
The vehicle lamp according to claim 3, characterized in that: The second surface reflects the light from the first light source that has entered the third portion from the first portion to the first surface side, and emits the light from the first surface side to the lamp lens side One or more reflecting surfaces are provided.
The vehicle lamp according to any one of claims 1 to 4, characterized in that:

Images