JP2018045940A - Vehicle optical member and vehicle lamp provided with vehicle optical member - Google Patents

Abstract

An optical member for a vehicle and a vehicular lamp that can obtain a light-emitting surface that emits light with uniform or substantially uniform illuminance (brightness). The present invention relates to an incident surface 41, 42, 43, a first exit surface 50, two divided reflecting surfaces 60U, 60D, and two (two sets) modified reflecting surfaces 71L, 71R, 72L, 72R, 73L, 73R and two second exit surfaces 80L, 80R. At least a part of the incident surfaces 41, 42, 43 and a part of the first emission surface 50 face each other. As a result, the present invention can provide the light guide members 3 and 3A and the lamp 1 that can obtain a light emitting surface that emits light with uniform or substantially uniform illuminance (brightness). [Selection] Figure 1

Description

  The present invention relates to an optical member for a vehicle. The present invention also relates to a vehicular lamp provided with a vehicular optical member.

  2. Description of the Related Art Conventionally, a vehicular optical member and a vehicular lamp including the vehicular optical member (hereinafter simply referred to as “a vehicular optical member, a vehicular lamp”) have been conventionally used (for example, Patent Document 1). Hereinafter, conventional vehicle optical members (light guide lenses) and vehicle lamps (lamps) will be described. A conventional vehicular lamp includes a vehicular optical member, a light source, and an outer lens. A conventional vehicle optical member includes an incident surface, a side reflecting surface located in a region facing the incident surface and close to the optical axis, a front reflecting surface, and an emitting surface located in another region. It is.

  In the conventional vehicle optical member and vehicle lamp, when the light source is turned on, the light from the light source is incident on the vehicle optical member from the incident surface, and the incident light is reflected to the left and right sides by the side reflection surface. The reflected light on both sides is reflected forward by the front reflecting surface, the front reflected light is emitted from the emitting surface, and the emitted light is irradiated to the outside through the outer lens.

  Conventional vehicular optical members and vehicular lamps irradiate an area close to the optical axis with light emitted from a wide area, so there is no difference in the amount of light between the area close to the optical axis and other areas, and uniform irradiation is achieved. It can be carried out.

JP 2014-154522 A

  However, the conventional vehicular optical member and vehicular lamp reflect incident light to the left and right sides of the side reflecting surface, and reflects the reflected light of both the left and right sides forward to the front reflecting surface and emits it from the exit surface. Is. For this reason, the conventional vehicle optical member and vehicle lamp cannot emit part of the incident light from the side reflecting surface, so that the side facing the incident surface and located in the region close to the optical axis. There is a difference between the amount of light on the reflecting surface and the amount of light on the exit surface located in other areas. Thereby, the conventional vehicular optical member and vehicular lamp may not be able to obtain uniform irradiation, that is, a uniform light emitting surface, between the side reflection surface and the exit surface.

  An object of the present invention is to provide a vehicular optical member and a vehicular lamp that can obtain a light emitting surface that emits light with uniform or almost uniform illuminance (brightness).

  An optical member for a vehicle according to the present invention includes an incident surface on which light from a light source is incident, a first emission surface that emits a part of incident light, and the remaining incident light, respectively, and a path of the remaining incident light. A plurality of divided reflection surfaces for dividing the plurality of divided reflected light, a plurality of changed reflection surfaces for respectively changing the paths of the plurality of divided reflected lights, and a plurality of changed reflected lights respectively. A plurality of second emission surfaces, and at least a part of the incidence surface and a part of the first emission surface are opposed to each other.

  In the optical member for a vehicle according to the present invention, the first emission surface has a rectangular shape or a substantially rectangular shape when viewed from the front, and two divided reflection surfaces are disposed on both sides of the first emission surface in the short direction. The incident light is reflected in the longitudinal direction of the first emission surface and opposite to each other to divide the path of the incident light into two, and the two second emission surfaces each have a rectangular shape in front view. Alternatively, it has a substantially rectangular shape and is arranged on both sides in the longitudinal direction of the first exit surface so that the longitudinal direction of the two second exit surfaces and the longitudinal direction of the first exit surface match or substantially match, The two modified reflecting surfaces are respectively composed of a first modified reflecting surface, a second modified reflecting surface, and a third modified reflecting surface, and are disposed between the two divided reflecting surfaces and the two second emitting surfaces. It is characterized by that.

  In the optical member for a vehicle according to the present invention, the first emission surface has a rectangular shape or a substantially rectangular shape when viewed from the front, and two divided reflection surfaces are disposed on both sides of the first emission surface in the short direction. The incident light is reflected in the longitudinal direction of the first emission surface and opposite to each other to divide the path of the incident light into two, and the two second emission surfaces each have a rectangular shape in front view. Alternatively, it has a substantially rectangular shape and is arranged on the reflection direction side of the two split reflection surfaces so that the longitudinal direction of the two second emission surfaces and the longitudinal direction of the first emission surface are parallel or substantially parallel. The two modified reflecting surfaces are arranged between the two divided reflecting surfaces and the two second emitting surfaces.

  A vehicular lamp according to the present invention includes a lamp housing and a lamp lens that define a lamp chamber, a light source disposed in the lamp chamber, and the optical member for a vehicle according to each of the present invention, and an incident surface serving as a light source. The first and second emission surfaces face each other, and the lamp lens faces the lamp lens.

  A vehicular lamp according to the present invention includes a lamp housing and a lamp lens that define a lamp chamber, a plurality of light sources disposed in the lamp chamber, and the vehicular optical member according to the present invention. The incident surface of the optical member for a vehicle faces a plurality of light sources, and the first emission surface and the second emission surface of the plurality of optical members for a vehicle respectively face a lamp lens.

  The vehicular lamp according to the present invention is characterized in that an inner lens is disposed between the first emission surface and the second emission surface and the lamp lens.

  The vehicular optical member and vehicular lamp of the present invention can provide the vehicular optical member and vehicular lamp that can obtain a light emitting surface that emits light with uniform or substantially uniform illuminance (brightness).

FIG. 1 is a front view showing a first embodiment of a vehicular optical member and vehicular lamp according to the present invention. FIG. 2 is a longitudinal sectional view (sectional view taken along line II-II in FIG. 1) showing the vehicular lamp. FIG. 3 is a front view (a view taken along the line III-III in FIG. 2) showing the optical member for a vehicle. FIG. 4 is a bottom view (an arrow IV view in FIG. 3) showing the vehicle optical member. FIG. 5 is an explanatory diagram showing an optical path (light path) in the vehicle optical member. FIG. 5A is an explanatory diagram (an explanatory diagram corresponding to the bottom view of FIG. 6B) showing an optical path in the incident part and the first emission part. FIG. 5B is an explanatory view showing an optical path in the incident portion, the lower divided reflection portion, the left modified reflection portion, and the left second emission portion (an explanatory view corresponding to the bottom view of FIG. 6C). ). FIG. 5C is an explanatory view showing an optical path in the incident portion, the upper divided reflection portion, the right modified reflection portion, and the right second emission portion (an explanatory view corresponding to the bottom view of FIG. 6D). It is. FIG. 6 is a perspective view showing an optical member for a vehicle. FIG. 6A is a perspective view showing the entire optical member for a vehicle. FIG. 6B is a perspective view showing the incident portion and the first emitting portion of the vehicle optical member. FIG. 6C is a perspective view showing an incident portion, a lower divided reflection portion, a left change reflection portion, and a left second emission portion of the vehicle optical member. FIG. 6D is a perspective view showing the incident portion, the upper divided reflection portion, the right modified reflection portion, and the right second emission portion of the vehicle optical member. FIG. 7 is a front view of a vehicular optical member showing a second embodiment of the vehicular optical member and the vehicular lamp according to the present invention. FIG. 8 is a bottom view (viewed along arrow VIII in FIG. 7) showing the optical member for a vehicle.

  Hereinafter, two examples of embodiments (examples) of a vehicle optical member and a vehicle lamp according to the present invention will be described in detail with reference to the drawings. In this specification, front, rear, upper, lower, left, and right are front, rear, upper, lower, left, and right when the vehicle optical member and the vehicle lamp according to the present invention are mounted on the vehicle. .

  In the figure, “F” is “front”, “B” is “rear”, “U” is upper, “D” is “lower”, “L” is “left”, “R” is “right” is there. 3 to 5, 7, and 8, arrows and small black circles in the drawings indicate optical paths. In FIGS. 3, 6B to 7D, and 7, optical elements such as prisms are not shown.

(Description of Configuration of Embodiment 1)
1 to 6 show Embodiment 1 of an optical member for a vehicle and a lamp for a vehicle according to the present invention. Hereinafter, the configuration of the vehicular optical member and vehicular lamp according to the first embodiment will be described. In the figure, reference numeral 1 denotes a vehicular lamp according to the first embodiment.

(Description of vehicle lamp 1)
A vehicular lamp (hereinafter, simply referred to as “lamp”) 1 is a rear combination lamp in this example. The lamp 1 is mounted on each of the left and right sides of the rear portion of the vehicle (not shown). The vehicular lamp 1 includes a lamp housing 10, a lamp lens (for example, a transparent outer cover, an outer lens, etc.) 11, an inner lens 13, a bracket 14, a light source 2, and the vehicular optical according to the first embodiment. A member (lens member, light guide lens, light guide, light guide, light guide member, etc.) 3.

  A plurality (three in this example) of light sources 2 and vehicle optical members (hereinafter simply referred to as “light guide members”) 3 are provided. In this example, the three light sources 2 and the light guide member 3 constitute a tail / stop lamp unit of a rear combination lamp.

(Description of the lamp housing 10 and the lamp lens 11)
The lamp housing 10 is composed of, for example, a light impermeable member (such as a resin member). The lamp housing 10 has a shape in which a rear portion of the vehicle is opened and a front portion of the vehicle is closed.

  The lamp lens 11 is made of, for example, a light transmissive member (such as a resin member). The lamp lens 11 has a shape in which a front portion of the vehicle is open and a rear portion of the vehicle is closed. The design surface of the closed portion of the lamp lens 11 is along the design surface of the rear portion of the vehicle.

  The opening edge of the lamp housing 10 and the opening edge of the lamp lens 11 are fixed. Thereby, the lamp chamber 12 is partitioned. In the lamp chamber 12, a tail / stop lamp unit including three light sources 2 and a light guide member 3, an inner lens 13, and a bracket 14 are arranged.

  The inner lens 13 is disposed so as to face the lamp lens 11. The inner lens 13 is attached to the lamp housing 10 via a bracket 14 as an attachment member. The inner lens 13 diffuses light from the light guide member 3 (first outgoing light L5, second outgoing light L8L, L8R) vertically and horizontally (particularly horizontally). The inner lens 13 is provided with optical elements such as a prism (fisheye prism, cylindrical prism, etc.) and a textured process.

  In the lamp chamber 12, other lamp units (not shown), for example, a backup lamp, a turn signal lamp, and the like may be arranged. In the lamp chamber 12, an inner panel, an inner housing, an extension, or the like (not shown) may be disposed.

(Description of light source 2)
The light source 2 includes a light emitting unit 20 and a substrate 21. The substrate 21 is attached to the lamp housing 10 via a bracket 14 as an attachment member. Thus, the three light sources 2 are respectively arranged in the lamp chamber 12.

  In this example, the light emitting unit 20 includes one or more self-emitting semiconductor type light emitting elements (semiconductor light emitting elements) such as LEDs, OELs, or OLEDs (organic ELs). The light emitting surface of the light emitting unit 20 is on the lamp lens 11 side and faces the light guide member 3 side.

  The light source 2 has an optical axis Z. The optical axis Z passes through the center or substantially the center of the light emitting surface of the light emitting unit 20 and is perpendicular or substantially perpendicular to the light emitting surface of the light emitting unit 20. Light from the light source 2 and emitted from the light source 2 (hereinafter referred to as “light source light”) L1 is red in this example. For this reason, the light irradiated from the lamp lens 11 through the light guide member 3 and the inner lens 13 is red. Accordingly, the tail / stop lamp has a function of emitting red light. If the light emitted from the lamp lens 11 is finally red, the light source light L1 may be white light or the like.

(Description of the light guide member 3)
In this example, the light guide member 3 is made of a colorless transparent resin material such as acrylic resin, PC (polycarbonate), or PMMA (polymethyl methacrylate, methacrylic resin). The light guide member 3 is colorless and transparent or red and transparent.

  The light guide member 3 is attached to the lamp housing 10 via a bracket 14 as an attachment member. Thereby, the three light guide members 3 are respectively arranged in the lamp chamber 12. The light guide member 3 is disposed between the light source 2 side and the lamp lens 11 and inner lens 13 side.

  The light guide member 3 includes one (one set) incident surfaces 41 and 42, one parallel light reflecting surface 43, one first emitting surface 50, two divided reflecting surfaces 60U and 60D, and two. (2 sets) of change reflecting surfaces 71L, 71R, 72L, 72R, 73L, 73R and two second exit surfaces 80L, 80R are provided.

  The light guide member 3 includes one incident portion 4, one first emission portion 5, two divided reflection portions 6U and 6D, two change reflection portions 7L and 7R, two second emission portions 8L, 8R. The incident portion 4, the first emitting portion 5, the divided reflecting portions 6U and 6D, the modified reflecting portions 7L and 7R, and the second emitting portions 8L and 8R have an integral structure.

(Description of the incident part 4)
The incident part 4 has a partial shape of a rotating paraboloid formed by rotating a parabola around the optical axis Z. The incident portion 4 has a circular shape centered on the optical axis Z when viewed from the front. Here, the front view means that the vehicle is viewed from the rear side to the front side. Therefore, the rear surface of the incident portion 4 has a circular shape.

(Description of the first incident surface 41, the second incident surface 42, and the parallel light reflecting surface 43)
The incident portion 4 is provided with incident surfaces 41 and 42 and a parallel light reflecting surface 43. The incident surface includes a first incident surface 41 and a second incident surface 42. The first incident surface 41 and the second incident surface 42 face the light emitting surface of the light emitting unit 20 of the light source 2.

  The first entrance surface 41 is a convex lens surface having a focal point F1 on the optical axis Z and positioned at or near the center of the light emitting surface of the light emitting unit 20 of the light source 2 (by rotating the hyperbola of the focal point F1 around the optical axis Z). Rotating hyperboloid etc.). For this purpose, the first incident surface 41 causes a part of the light source light L1 to be incident in the backward direction as incident parallel light L2 that is parallel or substantially parallel to the optical axis Z.

  The second incident surface 42 is a conical surface that is rotated about the optical axis Z as a central axis. For this purpose, the second incident surface 42 causes a part of the light source light L1 to be incident obliquely backward as incident refracted light L3. The cross-sectional line of the second incident surface 42 may be a straight line or a curved line.

  The parallel light reflecting surface 43 rotates a parabola whose focal point (not shown) is located on the optical axis Z and located closer to the first incident surface 41 than the focal point F1 of the first incident surface 41 around the optical axis Z. It consists of a rotating paraboloid. For this reason, the parallel light reflecting surface 43 reflects the incident refracted light L3 in the backward direction as reflected parallel light L4 that is parallel or substantially parallel to the optical axis Z. The reflected parallel light L4 is incident light, similar to the incident parallel light L2. The parallel light reflecting surface 43 is an incident surface, like the first incident surface 41 and the second incident surface 42.

(Description of the first emitting portion 5)
The first emitting portion 5 has a substantially rectangular parallelepiped shape. The 1st output part 5 is the circular rear surface of the incident part 4, Comprising: It is integrally provided in the center part divided | segmented into the upper part, the middle part, and the lower part into 3 parts. That is, the front surface of the first emitting unit 5 and the rear surface of the incident unit 4 are integrated.

(Description of the first emission surface 50)
A first emission surface 50 is provided on the rear surface of the first emission unit 5. The first emission surface 50 has a substantially rectangular shape in which the front view shape is long in the left-right direction. Note that the left and right short sides form part of a circular arc on the rear surface of the incident portion 4. Here, the longitudinal direction of the first emission surface 50 is the left-right direction. Moreover, the short side direction of the 1st output surface 50 is an up-down direction.

  The first emission surface 50 faces the inner lens 13. The first emission surface 50 causes the incident light, that is, a part of the incident parallel light L2 and the reflected parallel light L4 to be emitted to the outside in the backward direction as the first emission light L5. The first emission surface 50 is provided with an optical element (such as a prism or a graining process) that diffuses the first emission light L5 in the left-right direction.

  At least a part of the incident surfaces 41, 42, 43 and a part of the first emission surface 50 are opposed to each other. That is, among the first incident surface 41, the second incident surface 42, and the parallel light reflecting surface 43, the central portion of the circular rear surface of the incident portion 4 and the first emission surface 50 face each other.

(Explanation of the split reflection portions 6U and 6D)
The two divided reflecting portions 6U and 6D each have a triangular prism shape (triangular plate shape). The two split reflection parts 6U and 6D are integrally provided on the upper and lower parts of the circular rear surface of the incident part 4, which are divided into three or almost three equal parts in the upper, middle and lower parts. Yes. That is, the front surface of the upper divided reflection portion 6U and the rear surface of the upper portion of the incident portion 4 are integrated. Further, the front surface of the lower divided reflecting portion 6D and the rear surface of the lower portion of the incident portion 4 are integrated.

  In addition, the two divided reflecting portions 6U and 6D are integrally provided on the upper surface and the lower surface of the first emitting portion 5. That is, the lower surface of the upper divided reflecting portion 6U and the upper surface of the first emitting portion 5 are integrated. Further, the upper surface of the lower divided reflecting portion 6D and the lower surface of the first emitting portion 5 are integrated.

(Explanation of split reflection surfaces 60U and 60D)
The two split reflection portions 6U and 6D are provided with two split reflection surfaces 60U and 60D. The upper divided reflection surface 60U is provided on the left inclined surface of the upper divided reflection portion 6U. The lower divided reflection surface 60D is provided on the right inclined surface of the lower divided reflection portion 6D.

  The two split reflection surfaces 60U and 60D are disposed on both sides of the first emission surface 50 in the short direction (up and down both sides in the vertical direction). The two split reflection surfaces 60U and 60D are configured so that the remaining incident light, that is, the incident parallel light L2 and the reflected parallel light L4 are divided and reflected light L6L and L6R in the longitudinal direction of the first emission surface 50, respectively. Reflect in the opposite direction (left and right).

  That is, the upper split reflection surface 60U reflects the upper incident parallel light L2 and the reflected parallel light L4 in the right direction as the right split reflected light L6R. The lower divided reflection surface 60D reflects the lower incident parallel light L2 and the reflected parallel light L4 in the left direction as the left divided reflected light L6L. The two divided reflection surfaces 60U and 60D divide the path of the remaining incident parallel light L2 and reflected parallel light L4 into two in the left-right direction.

  The two split reflection surfaces 60U and 60D are shifted in the vertical direction or the substantially vertical direction (short direction of the first emission surface 50) with respect to the reflection direction (longitudinal direction of the first emission surface 50). That is, the two divided reflection surfaces 60U and 60D are shifted in the vertical direction.

(Explanation of the modified reflecting portions 7L and 7R)
The two change reflecting portions 7L and 7R each have a parallelepiped shape. The two change reflection parts 7L and 7R are integrally provided in the two divided reflection parts 6U and 6D. That is, the right side surface of the left side change reflecting portion 7L and the left side surface of the lower divided reflecting portion 6D are integrated. The left side surface of the right modified reflecting portion 7R and the right side surface of the upper divided reflecting portion 6U are integrated.

(Explanation of second emission parts 8L and 8R)
The two second emitting portions 8L and 8R each have a triangular prism shape (triangular plate shape). The two second emitting portions 8L and 8R are provided integrally with the two modified reflecting portions 7L and 7R. That is, the right side surface of the left second emission portion 8L and the left side surface of the left modified reflection portion 7L are integrated. The left side surface of the right second emitting portion 8R and the right side surface of the right modified reflecting portion 7R are integrated.

(Description of the modified reflecting surfaces 71L, 71R, 72L, 72R, 73L, 73R)
Two (two sets) of modified reflective surfaces 71L, 71R, 72L, 72R, 73L, and 73R are provided in the two modified reflective units 7L and 7R and the two second emitting units 8L and 8R. That is, the left modified reflecting portion 7L and the second emitting portion 8L are provided with a left modified first reflecting surface 71L, a left modified second reflecting surface 72L, and a left modified third reflecting surface 73L. The right modified reflecting portion 7R and the second emitting portion 8R are provided with a right first modified reflecting surface 71R, a right second modified reflecting surface 72R, and a right third modified reflecting surface 73R.

  The two first modified reflecting surfaces 71L and 71R, the two second modified reflecting surfaces 72L and 72R, the two third modified reflecting surfaces 73L and 73R are divided into two divided reflecting surfaces 60U and 60D and two second emitting surfaces 80L. , 80R.

  The left first modified reflecting surface 71L is provided on the lower inclined surface of the left modified reflecting portion 7L, and reflects the left divided reflected light L6L as the left first modified reflected light L71L in the upward direction. The left second modified reflection surface 72L is provided on the upper inclined surface of the left modified reflection portion 7L, and the left first modified reflected light L71L is reflected in the left direction as the second modified reflected light L72L on the left side. Let The left third modified reflecting surface 73L is provided on the rear inclined surface of the left second emitting portion 8L, and the left second modified reflected light L72L is defined as the left third modified reflected light L73L in the rearward direction. Reflect.

  The right first modified reflecting surface 71R is provided on the upper inclined surface of the right modified reflecting portion 7R, and reflects the right divided reflected light L6R in the downward direction as the right first modified reflected light L71R. The right second modified reflecting surface 72R is provided on the lower inclined surface of the right modified reflecting portion 7R, and the right first modified reflected light L71R is reflected in the right direction as the right second modified reflected light L72R. Let The right third modified reflecting surface 73R is provided on the rear inclined surface of the right second emitting portion 8R, and the right second modified reflected light L72L is used as the right third modified reflected light L73R in the rearward direction. Reflect.

(Description of second emission surfaces 80L and 80R)
Two second exit surfaces 80L and 80R are provided on the rear surfaces of the two second exit portions 8L and 8R. The two second emission surfaces 80L and 80R each have a rectangular shape or a substantially rectangular shape when viewed from the front.

  The two second emission surfaces 80L and 80R are disposed on both sides in the longitudinal direction of the first emission surface 50 (both left and right sides in the left-right direction). Further, the two second emission surfaces 80L and 80R are arranged so that the longitudinal direction of the two second emission surfaces 80L and 80R and the longitudinal direction of the first emission surface 50 match or substantially match.

  Further, the three light guide members 3 in the lamp chamber 12 are arranged so that the longitudinal direction of the first emission surface 50 and the longitudinal directions of the two second emission surfaces 80L and 80R match or substantially match. Yes. Thereby, as shown in FIG. 1, in the three light guide members 3 in the lamp chamber 12, the middle first emission surface 50 and the two second emission surfaces 80L, 80R on the left and right sides are long in the left-right direction. One band-like (line-like) light emitting surface is formed.

  The two second emission surfaces 80L and 80R are opposed to the inner lens 13. The two second emission surfaces 80L and 80R emit the left and right third modified reflected lights L73L and L73R to the outside in the backward direction as the second emitted lights L8L and L8R. The two second emission surfaces 80L and 80R are provided with optical elements (such as prisms and embossing) that diffuse the second emission lights L8L and L8R in the left-right direction.

(Description of the operation of the first embodiment)
The light guide member 3 and the lamp 1 according to the first embodiment are configured as described above, and the operation thereof will be described below.

  The light emitting units 20 of the three light sources 2 are turned on. Then, the light source light L1 from the light emitting units 20 of the three light sources 2 becomes the incident parallel light L2 and the incident refracted light L3, the first incident surface 41 and the second incident light of the incident portions 4 of the three light guide members 3. The light enters from the surface 42 into the incident portion 4 of the light guide member 3.

  The incident parallel light L2 travels as it is as parallel light from the incident part 4 into the first emission part 5 and the upper and lower divided reflection parts 6U and 6D. On the other hand, the incident refracted light L3 is reflected by the parallel light reflecting surface 43 as reflected parallel light L4. The reflected parallel light L4 travels as parallel light from the entrance 4 to the first exit 5 and the upper and lower divided reflectors 6U and 6D.

  Part of the incident parallel light L2 and the reflected parallel light L4, which are incident light, passes through the incident part 4 and the first emission part 5, and then passes through the first emission surface 50 as the first emission light L5 in the backward direction. Directly exits.

  The remaining incident light, that is, incident parallel light L2 and reflected parallel light L4, passes through the incident portion 4 and the upper and lower divided reflection portions 6U and 6D, and is divided into left and right two divided reflection surfaces 60U and 60D. The reflected lights L6L and L6R are reflected leftward and rightward. Thereby, the path | route of the incident parallel light L2 and reflected parallel light L4 which are the remaining incident lights is divided | segmented into right and left two.

  The left divided reflected light L6L travels from the lower divided reflector 6D into the left modified reflector 7L. The left divided reflected light L6L is reflected upward by the left first modified reflecting surface 71L as the left first modified reflected light L71L. The left first modified reflected light L71L is reflected leftward as the second modified reflected light L72L on the left by the second modified reflective surface 72L on the left.

  The left second modified reflected light L72L travels from the left modified reflecting portion 7L to the left second emitting portion 8L. The second changed reflected light L72L on the left side is reflected backward as the third changed reflected light L73L on the left side by the third changed reflected surface 73L on the left side. The third modified reflected light L73L on the left side passes through the left second emission part 8L, and is emitted to the outside in the backward direction as the second emission light L8L on the left side from the second emission surface 80L on the left side.

  Further, the right divided reflected light L6R travels from the upper divided reflective portion 6U into the right modified reflective portion 7R. The right divided reflected light L6R is reflected downward as the first changed reflected light L71R on the right by the first changed reflected surface 71R on the right. The first modified reflected light L71R on the right side is reflected in the right direction as the second modified reflected light L72R on the right side by the second modified reflecting surface 72R on the right side.

  The right second modified reflected light L72R travels from the right modified reflecting portion 7R into the right second emitting portion 8R. The second changed reflected light L72R on the right side is reflected backward by the third changed reflecting surface 73R on the right side as the third changed reflected light L73R on the right side. The third modified reflected light L73R on the right side passes through the right second emission part 8R, and is emitted to the outside in the rearward direction as the second emission light L8R on the right side from the second emission surface 80R on the right side.

  The middle first emitted light L5 and the left and right second emitted lights L8L and L8R are emitted from the three light guide members 3 through the inner lens 13 and the lamp lens 11 as red light in the rearward direction of the vehicle. . Thereby, the light guide member 3 and the lamp 1 according to the first embodiment can perform the tail / stop lamp function.

  At this time, as shown in FIG. 1, the first light exit surface 50 on the inner side of the three light guide members 3 in the lamp chamber 12 and the two second light exit surfaces 80L and 80R on the left and right sides are long in the left-right direction. Light is emitted as a single band-shaped (line-shaped) light-emitting surface. Moreover, the band-shaped (line-shaped) light emitting surface emits light uniformly or almost uniformly.

(Description of the effect of Embodiment 1)
The light guide member 3 and the lamp 1 according to the first embodiment are configured and operated as described above, and the effects thereof will be described below.

  The light guide member 3 and the lamp 1 according to the first embodiment emit a part of incident parallel light L2 and reflected parallel light L4 as incident light from the first first emission surface 50 as first emission light L5, The remaining incident light, incident parallel light L2 and reflected parallel light L4, pass through two upper and lower divided reflecting surfaces 60U and 60D and two right and left (two sets) modified reflecting surfaces 71L, 71R, 72L, 72R, 73L, and 73R. The two second outgoing lights L8L and L8R are emitted from the two right and left second outgoing faces 80L and 80R, respectively. Here, in the light guide member 3 and the lamp 1 according to the first embodiment, at least a part of the incident surfaces 41, 42, 43 and a part of the first emission surface 50, that is, the first incident surface 41, Of the second incident surface 42 and the parallel light reflecting surface 43, the central portion of the circular rear surface of the incident portion 4 and the first emission surface 50 face each other, so that the incident light from the incident surfaces 41, 42, 43 A part of the incident parallel light L2 and the reflected parallel light L4 can be directly emitted from the first emission surface 50. Therefore, in the light guide member 3 and the lamp 1 according to the first embodiment, the light amount on the first emission surface 50 (first emission light L5) and the two right and left second emission surfaces 80L and 80R (second emission light L8L). , L8R) can be eliminated or reduced. As a result, the light guide member 3 and the lamp 1 according to the first embodiment emit light with uniform or substantially uniform illuminance (brightness) (the first emission surface 50 on the middle side and the two second sides on the left and right sides). The emission surfaces 80L and 80R) can be obtained.

  In the light guide member 3 and the lamp 1 according to the first embodiment, the first emission surface 50 on the inner side and the second emission surfaces 80L and 80R on the left and right sides each have a rectangular shape or a substantially rectangular shape in front view, In addition, the longitudinal direction of the first first emission surface 50 on the middle side and the longitudinal directions of the two second emission surfaces 80L and 80R on both the left and right sides match or substantially match. For this reason, the light guide member 3 and the lamp 1 according to the first embodiment can obtain a single belt-like (line-like) light emitting surface that is long in the left-right direction and emits light uniformly or substantially uniformly.

  In particular, in the light guide member 3 and the lamp 1 according to the first embodiment, the three light sources 2 and the light guide member 3 are arranged in the lamp chamber 12, and The longitudinal direction of one outgoing surface 50 and the longitudinal directions of the two second outgoing surfaces 80L and 80R on the left and right sides are matched or substantially matched. Therefore, as shown in FIG. 1, the light guide member 3 and the lamp 1 according to the first embodiment have a single strip-shaped (line-shaped) light-emitting surface that emits light uniformly or substantially uniformly. It is done.

  In the light guide member 3 and the lamp 1 according to the first embodiment, the inner lens 13 is disposed between the first emission surface 50 and the two second emission surfaces 80 </ b> L and 80 </ b> R and the lamp lens 11. For this reason, the light guide member 3 and the lamp 1 according to the first embodiment include the first outgoing light L5 from the first outgoing surface 50 and the two left and right second outgoing beams from the left and right second outgoing surfaces 80L and 80R. The incident lights L8L and L8R can be further diffused. Thereby, the light guide member 3 and the lamp 1 according to the first embodiment further have a light emitting surface that emits light with uniform or almost uniform illuminance (brightness) (the first light emitting surface 50 on the inner side and the two on the left and right sides). The second emission surfaces 80L and 80R) can be obtained.

(Description of Embodiment 2)
7 and 8 show Embodiment 2 of the vehicle optical member and the vehicle lamp according to the present invention. Hereinafter, the vehicle optical member and the vehicle lamp according to the second embodiment will be described. In the figure, the same reference numerals as those in FIGS. 1 to 6 denote the same components.

  In the second embodiment, the structure of the optical member for vehicles according to the second embodiment (hereinafter referred to as “light guide member 3A”) is different from the structure of the light guide member 3 in the first embodiment. However, the structure of the vehicular lamp according to the second embodiment (hereinafter referred to as “lamp”) and the structure of the lamp 1 in the first embodiment are the same or substantially the same. For this reason, in the second embodiment, the description of the structure of the lamp 1 shown in FIGS. 1 and 2 in the first embodiment is omitted.

  The lamp 1 and the light guide member 3 according to the first embodiment include the change reflecting portions 7L and 7R provided with the first change reflection surfaces 71L and 71R and the second change reflection surfaces 72L and 72R. On the other hand, the lamp and the light guide member 3A according to the second embodiment omit the change reflection portions 7L and 7R provided with the first change reflection surfaces 71L and 71R and the second change reflection surfaces 72L and 72R. It is. That is, the lamp and the light guide member 3A according to the second embodiment are provided by directly providing the two left and right second emission portions 8L and 8R on the upper and lower divided reflection portions 6U and 6D.

  Thereby, as for the lamp and light guide member 3A of this Embodiment 2, two right and left 2nd output surfaces 80L and 80R have shifted | deviated to the up-down direction similarly to the upper and lower two division | segmentation reflective surfaces 60U and 60D. That is, the two right and left second emission surfaces 80L and 80R are arranged on the reflection direction side (left direction and right direction) of the upper and lower divided reflection surfaces 60U and 60D, and the longitudinal direction of the middle first emission surface 50 and both the left and right sides. In this case, the upper and lower second emission surfaces 80L and 80R are arranged so that the longitudinal directions thereof are parallel or substantially parallel.

  In the three light guide members 3A in the lamp chamber (12), the longitudinal directions of the first first exit surfaces 50 on the inner side match or substantially match each other, and two upper and lower second exit surfaces 80L on the left and right sides. The longitudinal directions of 80R are matched or substantially matched, and the longitudinal direction of the middle first emission surface 50 is parallel to the longitudinal direction of the upper and lower second emission surfaces 80L and 80R on both the left and right sides. It arrange | positions so that it may become substantially parallel.

  Further, the lamp and the light guide member 3A according to the second embodiment include two modified reflection surfaces 70L and 70R (the modified reflection corresponding to the two third modified reflection surfaces 73L and 73R of the light guide member 3 according to the first embodiment). Surface) is disposed between the two split reflection surfaces 60U and 60D and the two second emission surfaces 80L and 80R. The two changed reflective surfaces 70L and 70R reflect the two divided reflected lights L6L and L6R in the backward direction as the two changed reflected lights L70L and L70R.

  Since the lamp and light guide member 3A of the second embodiment are configured as described above, the same or substantially the same effect as the lamp 1 and the light guide member 3 of the first embodiment can be achieved. In particular, in the lamp and light guide member 3A according to the second embodiment, the middle first emission surface 50, the left second emission surface 80L, and the right second emission surface 80R are displaced up and down. Compared to the light emitting surface of the lamp 1 and the light guide member 3, a light emitting surface that is wider in the vertical direction is obtained. Moreover, in the lamp and light guide member 3A of the second embodiment, the number of reflections of the second emitted lights L8L and L8R is the number of reflections of the second emitted lights L8L and L8R of the lamp 1 and the light guide member 3 of the first embodiment. Therefore, the light loss of the light source 2 can be reduced.

(Description of examples other than Embodiments 1 and 2)
In the first and second embodiments, the tail / stop lamp of the rear combination lamp will be described. However, the present invention can be applied to lamps other than the rear combination lamp tail / stop lamp. For example, the present invention can also be applied to a rear combination lamp backup lamp, turn signal lamp, license plate lamp, or front combination lamp turn signal lamp, clearance lamp, side marker lamp, daytime running lamp, and the like.

  In the first and second embodiments, the vertical width of the first emission surface 50 and the vertical width of the two second emission surfaces 80L and 80R are equal or substantially equal. However, in the present invention, the vertical width of the first emission surface 50 may be made smaller than the vertical width of the two second emission surfaces 80L and 80R. Thereby, the light quantity of the 1st emitted light L5 from the 1st output surface 50 with a strong light close to the optical axis Z is decreased, and two right and left 2nd output surfaces 80L and 80R which are separated from the optical axis Z and whose light is weak. The light quantity of the 2nd emitted light L8L from L8L, L8R can be increased. As a result, the difference between the light quantity at the first emission surface 50 (first emission light L5) and the light quantity at the two left and right second emission surfaces 80L and 80R (second emission light L8L, L8R) is eliminated or reduced. can do.

  In the first and second embodiments, the incident surface includes the first incident surface 41, the second incident surface 42, and the parallel light reflecting surface 43, and the incident light is incident parallel light L2, incident refracted light L3, and reflected parallel light. It consists of light L4. However, in the present invention, the incident surface may be an incident surface other than the first incident surface 41, the second incident surface 42, and the parallel light reflecting surface 43, and the incident light may be incident parallel. It may be composed of incident light other than the light L2, the incident refracted light L3, and the reflected parallel light L4.

  The present invention is not limited to the first and second embodiments.

1 Vehicle lamps (lamps)
DESCRIPTION OF SYMBOLS 10 Lamp housing 11 Lamp lens 12 Lamp chamber 13 Inner lens 14 Bracket 2 Light source 20 Light emission part 21 Board | substrate 3, 3A Optical member for vehicles (light guide member)
4 incident portion 41 first incident surface 42 second incident surface 43 parallel light reflecting surface 5 first emitting portion 50, 51U, 51D first emitting surface 6U, 6D divided reflecting portion 60U, 60D divided reflecting surface 7L, 7R modified reflecting portion 70L, 70R Modified reflecting surface 71L, 71R First modified reflecting surface 72L, 72R Second modified reflecting surface 73L, 73R Third modified reflecting surface 8L, 8R Second emitting part 80L, 80R Second emitting surface B After D Below F Before F1 focus L left L1 light source light L2 incident parallel light (incident light)
L3 Incident refracted light (incident light)
L4 Reflected parallel light (incident light)
L5, L5U, L5D First outgoing light L6L, L6R Split reflected light L70L, L70R Modified reflected light L71L, L71R First modified reflected light L72L, L72R Second modified reflected light L73L, L73R Third modified reflected light L8L, L8R Second Outgoing light R Right U Up Z Optical axis

Claims (6)

An incident surface on which light from a light source is incident;
A first exit surface that emits a portion of incident light;
A plurality of split reflecting surfaces that respectively reflect the remaining incident light and divide the path of the remaining incident light into a plurality of parts;
A plurality of change reflection surfaces that respectively reflect a plurality of divided reflected lights and change paths of the plurality of divided reflected lights respectively;
A plurality of second emission surfaces that respectively emit a plurality of modified reflected lights;
With
At least a part of the incident surface and a part of the first emission surface are opposed to each other.
An optical member for a vehicle characterized by the above. The first emission surface has a rectangular shape or a substantially rectangular shape in front view,
The two split reflecting surfaces are arranged on both sides in the short direction of the first exit surface, and reflect the incident light in the longitudinal direction of the first exit surface and in opposite directions to each other, Dividing the path of the incident light into two,
Each of the two second emission surfaces has a rectangular shape or a substantially rectangular shape when viewed from the front, and on both sides in the longitudinal direction of the first emission surface, the longitudinal direction of the two second emission surfaces and the first emission surface. It is arranged so that it matches or almost matches the longitudinal direction of the surface,
The two modified reflecting surfaces are each composed of a first modified reflecting surface, a second modified reflecting surface, and a third modified reflecting surface, and between the two divided reflecting surfaces and the two second emitting surfaces. Located in the
The optical member for vehicles according to claim 1 characterized by things. The first emission surface has a rectangular shape or a substantially rectangular shape in front view,
The two split reflecting surfaces are arranged on both sides in the short direction of the first exit surface, and reflect the incident light in the longitudinal direction of the first exit surface and in opposite directions to each other, Dividing the path of the incident light into two,
Each of the two second emission surfaces has a rectangular shape or a substantially rectangular shape when viewed from the front, and on the reflection direction side of the two divided reflection surfaces, the longitudinal direction of the two second emission surfaces and the first emission surface. It is arranged so that the longitudinal direction of the surface is parallel or almost parallel,
The two modified reflecting surfaces are disposed between the two divided reflecting surfaces and the two second emitting surfaces,
The optical member for vehicles according to claim 1 characterized by things. A lamp housing and a lamp lens that partition the lamp chamber;
The light source disposed in the lamp chamber and the vehicle optical member according to any one of claims 1 to 3,
With
The incident surface faces the light source;
The first emission surface and the second emission surface are opposed to the lamp lens;
A vehicular lamp characterized by the above. A lamp housing and a lamp lens that partition the lamp chamber;
A plurality of light sources arranged in the lamp chamber and the vehicle optical member according to claim 2 or 3,
With
The incident surfaces of the plurality of vehicle optical members are opposed to the plurality of light sources,
The first emission surface and the second emission surface of the plurality of optical members for a vehicle respectively face the lamp lens;
A vehicular lamp characterized by the above. An inner lens is disposed between the first and second emission surfaces and the lamp lens.
The vehicular lamp according to claim 4 or 5, wherein the vehicular lamp is provided.

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