JP2018045831A - Vehicular optical member and vehicular lighting fixture including vehicular optical member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent point light or a dark part due to a connection surface and a processing bent part from generating.SOLUTION: In this invention, a first functional portion 51 and a second functional portion 52 are integral. The first functional portion 51 includes an incident surface 53, an optical control part 54 and an emission surface 55. The second functional portion 52 includes an emission surface 520. The optical control part 54 is constituted by a wall surface of a space part 540 provided between the incident surface 53 and the emission surface 55. The optical control part 54 includes: a first optical control part comprising a refraction surface 544, a first re-incident surface 541 and a second re-incident surface 542; and a second optical control part comprising a reflection surface 543. As a result, this invention can prevent point light or a dark part due to a connection surface and a processing bent part from generating.SELECTED DRAWING: 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.

  Conventionally, a vehicular optical member and a vehicular lamp including the vehicular optical member (hereinafter simply referred to as “vehicle optical member, vehicular lamp”) have been conventionally used (for example, Patent Document 1). Hereinafter, a conventional light guide (vehicle optical member) and vehicle lamp will be described. A conventional vehicle lamp includes a lamp housing and a cover, a light source, and a light guide. The conventional light guide has an incident part and a light guide part. A light emitting part is formed in the light guide part. The incident portion is provided with a first guiding portion and a second guiding portion.

  Light from the light source enters the incident portion. The light incident on the incident part is guided to the light guiding part by the first guiding part and to the light emitting part by the second guiding part. The light guided to the light guide part is guided through the light guide part to the end opposite to the incident part, and is reflected by the light emitting part on the way, passes through the cover and is emitted to the outside. The light guided to the light emitting part is reflected by the light emitting part, passes through the cover, and is emitted to the outside.

  As described above, the conventional light guide and vehicle lamp guide the light incident on the incident portion to the light guide portion by the first guiding portion and to the light emitting portion by the second guiding portion, respectively. Therefore, it is possible to reduce the occurrence of unevenness of light and improve the light use efficiency.

JP 2014-229466 A

  However, conventional light guides and vehicle lamps have a connecting surface (extracted surface, inclined surface, step surface) between the first guiding portion (prism surface) and the second guiding portion (prism surface). A processed curved portion (processed R, processed curved surface) is formed at an angle formed between the surfaces. For this reason, in the conventional light guide and vehicle lamp, light leakage may occur due to the connecting surface and the processed curved portion, and spotlight may be generated, or a dark portion may be generated.

  The problem to be solved by the present invention is to provide a vehicular optical member and a vehicular lamp that can prevent generation of a spotlight or a dark portion due to a connecting surface or a processed curved portion.

  In the vehicle optical member of the present invention, the first functional portion and the second functional portion are integrated, the first functional portion is an incident surface on which light from the light source is incident, and the optical that optically controls the incident light. A control unit; and an emission surface for emitting optical control light. The second functional portion includes an emission surface for emitting optical control light. The optical control unit is provided between the incident surface and the emission surface. A first optical control unit configured to optically control a part of the incident light toward the exit surface of the first functional part, and at least a part of the remaining incident light to the second function. And a second optical control unit that performs optical control toward the part.

  In the vehicular optical member according to the present invention, a part of the incident surface is a parallel light incident surface on which light from the light source is incident as parallel light or substantially parallel light, and the second optical control unit has a focus on the second functional portion. The second optical control unit is an optical control surface that is a parabolic reflection surface that reflects incident parallel light toward the focal point.

  In the vehicular optical member of the present invention, the first functional part is composed of a plurality of blocks, and each of the plurality of blocks includes an entrance surface, an optical control unit, and an exit surface. Among the blocks, the focal point of the second optical control unit of the block far from the second functional part with respect to the block close to the second functional part is the optical control unit and the exit surface of the block close to the second functional part. It is located between.

  In the vehicular optical member according to the present invention, the incident surface that is another part of the incident surface and faces the second functional portion is a linear light incident surface that allows light from the light source to be incident as linear light or substantially linear light. It is characterized by that.

  The vehicular lamp according to the present invention includes a lamp housing and a lamp lens that define a lamp chamber, a light source disposed on the lamp housing side in the lamp chamber, and any one of the above disposed on the lamp lens side in the lamp chamber. Two optical members for a vehicle according to the present invention, wherein the emission surface of the first functional part and the emission surface of the second functional part are opposed to the lamp lens, and the incident surface of the first functional part is opposed to the light source. It is characterized by that.

  The vehicular optical member and vehicular lamp according to the present invention can prevent the generation of spotlights or dark portions due to the connecting surface or the processed curved portion.

FIG. 1 is an explanatory diagram (partially enlarged cross-sectional view taken along the line II in FIG. 4) of the optical path in the main part of the first embodiment of the vehicular optical member and vehicular lamp according to the present invention. FIG. 2 is a partially enlarged cross-sectional view (partially enlarged cross-sectional view taken along the line II in FIG. 4) showing the main part. FIG. 3 is an enlarged explanatory view showing an optical path in the main optical control unit. FIG. 4 is an explanatory diagram (a rear view of the vehicle) showing a use state. FIG. 5 is an explanatory diagram (a front view of a vehicular lamp) showing a lighting state. 6 is a cross-sectional view taken along line VI-VI in FIG. 7 is a cross-sectional view taken along line VII-VII in FIG. FIG. 8 is an explanatory view (enlarged explanatory view corresponding to FIG. 3) of the optical path in the main part showing Embodiment 2 of the vehicle optical member and the vehicle lamp according to the present invention.

  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. In the figure, hatching of a vehicle optical member, a light source, a bracket, and the like is omitted.

(Description of Configuration of Embodiment 1)
1 to 7 show Embodiment 1 of an optical member for a vehicle and a vehicle lamp according to the present invention. Hereinafter, the configuration of the vehicular optical member and vehicular lamp according to the first embodiment will be described. 4-7, the code | symbol 1 is a vehicle lamp concerning this Embodiment 1. FIG.

(Description of vehicle lamp 1)
In this example, the vehicular lamp 1 is a high-mount stop lamp. The vehicular lamp 1 is incorporated in a rear spoiler installed at the rear of the vehicle C (see FIG. 4). The vehicular lamp 1 and the rear spoiler are incorporated in the back door BD of the vehicle C. The vehicular lamp 1 is attached to a panel P (a part of the vehicle body, see FIGS. 6 and 7) constituting the back door BD with an attachment member (bolt nut or the like).

  Rear combination lamps 1L and 1R (see FIG. 4) are mounted on the left and right sides of the rear portion of the vehicle C, respectively. The rear combination lamps 1L and 1R include a stop lamp, a tail lamp, a turn signal lamp, a backup lamp, and the like. The vehicular lamp 1, which is a high-mount stop lamp, is disposed above the rear combination lamps 1L and 1R having a stop lamp.

  As shown in FIGS. 6 and 7, a vehicular lamp 1 includes a lamp housing 2, a lamp lens (for example, a transparent outer cover, an outer lens, etc.) 3, a light source 4, and a vehicle according to the first embodiment. A light guide member (light guide, light guide, inner lens) 5 as an optical member and a bracket 6 are provided.

  The light source 4 and the light guide member 5 are attached to the lamp housing 2 via a bracket 6. The lamp housing 2 is attached to the panel P by an attachment member. A space C1 (refer to FIG. 6) between the central portion of the light guide member 5 (corresponding to the central portion of the rear portion of the vehicle C) and the panel P is the left and right end portions of the light guide member 5 (left and right of the rear portion of the vehicle C It is larger than the space C2 (see FIG. 7) between the panel P and the panel P. For this reason, since the central part of the light guide member 5 has a space, the light source 4 can be disposed (see FIG. 6). On the other hand, since the left and right end portions of the light guide member 5 have no space, the light source 4 cannot be disposed (see FIG. 7).

(Description of the lamp housing 2 and the lamp lens 3)
The lamp housing 2 is made of, for example, a light impermeable member. The lamp housing 2 has a shape in which a rear portion of the vehicle C is open, while a front portion of the vehicle C is closed.

  The lamp lens 3 is made of, for example, a light transmissive member. The lamp lens 3 has a shape in which a front portion of the vehicle C is opened, while a rear portion of the vehicle C is closed.

  The opening edge of the lamp housing 2 and the opening edge of the lamp lens 3 are fixed. A lamp chamber 7 is defined by the lamp housing 2 and the lamp lens 3. In the lamp chamber 7, a light source 4, a light guide member 5, and a bracket 6 are arranged.

(Description of light source 4)
In this example, four light sources 4 are provided corresponding to the central portion of the light guide member 5. Each of the four light sources 4 includes a substrate 40 and a light emitting unit 41.

  The substrate 40 is attached to the lamp housing 2 via the bracket 6. The light source 4 is disposed on the lamp housing 2 side in the lamp chamber 7. In this example, the light emitting unit 41 is a self-luminous semiconductor light emitting element such as an LED, an OEL, or an OLED (organic EL), and faces the light guide member 5.

  The light source 4 has an optical axis Z. The optical axis Z passes through or substantially the center of the light emitting surface of the light emitting unit 41 and is perpendicular or substantially perpendicular to the light emitting surface of the light emitting unit 41.

(Description of the light guide member 5)
In this example, the light guide member 5 is made of a transparent resin material such as acrylic resin or PC (polycarbonate). The light guide member 5 is attached to the lamp housing 2 via the bracket 6. The light guide member 5 is disposed on the lamp lens 3 side in the lamp chamber 7.

  The light guide member 5 includes a first functional part 51 and a second functional part 52. The first functional part 51 and the second functional part 52 are integrated. The 1st functional part 51 is a center part of the light guide member 5, Comprising: It bears the light distribution function of a high mount stop lamp. The second functional portion 52 is the left and right end portions of the light guide member 5 and has a decoration (decoration) function.

(Description of the first functional part 51)
In this example, the first functional portion 51 is composed of four blocks 511, 512, 513, and 514 (hereinafter simply referred to as “511 to 514”) provided integrally and continuously on the left and right. Yes.

  Of the four blocks 511 to 514, the two blocks 511 and 514 at the left and right ends are blocks close to (that is, adjacent to) the second functional portion 52. Among the four blocks 511 to 514, two of the blocks 512 and 513 are blocks away from the second functional part 52 with respect to the two blocks 511 and 514 at the left and right ends.

  Each of the four blocks 511 to 514 includes an incident surface 53, an optical control unit 54, an exit surface 55, and a reflecting surface (hereinafter referred to as “parallel light reflecting surface”) 56. The four blocks 511 to 514 are paired with the four light sources 4 respectively. Hereinafter, the two blocks 513 and 514 on the right side will be described. Note that the configuration of the two blocks 511 and 512 on the left side is symmetric or substantially symmetric with respect to the configuration of the two blocks 513 and 514 on the right side. Therefore, the description of the two left blocks 511 and 512 is omitted.

(Description of the entrance surface 53)
The incident surface 53 of the inner block 513 (512) includes a first incident surface 531 and a second incident surface 532. The incident surface 53 of the right end block 514 (left end block 511) includes a first incident surface 531, a second incident surface 532, and a third incident surface 533.

  A first incident surface 531 which is a part of the incident surface 53 is a convex lens surface (having a hyperbola of the focal point F1 around the optical axis Z) in which the focal point F1 is on the optical axis Z and located at the center or substantially the center of the light emitting surface of the light source 4. Rotating hyperboloid etc.). Therefore, the first incident surface 531 causes the light source light L1 emitted from the light emitting unit 41 of the light source 4 to be incident as incident parallel light L2 that is parallel or substantially parallel to the optical axis Z. The first incident surface 531 is a parallel light incident surface.

  The second incident surface 532, which is a part of the incident surface 53, is a cylindrical inner surface that is rotated about the optical axis Z as a central axis. The second incident surface 532 causes the light source light L1 to be incident as incident refracted light L3. The second incident surface 532 is a refracted light incident surface.

  The third incident surface 533, which is another part of the incident surface 53, is made up of a part of a spherical surface with the center or substantially the center of the light emitting surface of the light source 4. For this reason, the third incident surface 533 causes the light source light L1 to be incident as linear light or substantially linear light (hereinafter referred to as “incident direct light”) L4. The third incident surface 533 is a linear light incident surface.

  The third incident surface 533 is an incident surface on the reflection direction side of the reflecting surface 543 of the optical control unit 54, and is an incident surface facing the second functional portion 52. Part of the incident direct light L4 from the third incident surface 533 is incident on the second functional portion 52 and is emitted as the emitted light L5 from the emission surface 520 of the second functional portion 52. The remaining part of the incident direct light L4 from the third incident surface 533 is reflected by the parallel light reflecting surface 56 as reflected parallel light L6 that is parallel or substantially parallel to the optical axis Z.

(Description of parallel light reflecting surface 56)
The parallel light reflecting surface 56 is composed of a plurality of stages of paraboloids whose focal points (not shown) are located on the optical axis Z and located closer to the first incident surface 531 than the focal point F1 of the first incident surface 531. Is. For this reason, the parallel light reflecting surface 56 reflects the remaining part of the incident refracted light L3 and the incident direct light L4 as reflected parallel light L6 that is parallel or substantially parallel to the optical axis Z.

(Description of the optical control unit 54)
The optical control unit 54 is a wall surface of the space portion 540 provided between the incident surface 53 and the emission surface 55, and is configured by a part of the optical control surface of the wall surface. The optical control unit 54 includes a reflecting surface 543, a refracting surface 544, a first re-incident surface 541, and a second re-incident surface 542. The refracting surface 544, the first re-incident surface 541, and the second re-incident surface 542 constitute a first optical control unit. The reflective surface 543 constitutes a second optical control unit.

(Description of reflective surface 543)
The reflection surface 543 is a reflection surface that reflects a part of the incident parallel light L2. That is, the reflection surface 543 is a reflection control surface that controls reflection of a part of the incident parallel light L2. The reflecting surface 543 is an optical control surface of a parabolic system (rotating paraboloid). The focal points F <b> 2 and F <b> 3 of the reflecting surface 543 are located between the incident surface 53 and the parallel light reflecting surface 56 and the emitting surface 55 and between the second functional portion 52 and the reflecting surface 543. For this reason, the reflecting surface 543 reflects a part of the incident parallel light L2 toward the focal points F2 and F3 as reflected light (converged reflected light) L7. The reflected light L7 is emitted from the focal points F2 and F3 and enters the second functional part 52. Accordingly, the focal points F2 and F3 function as a virtual light source.

  The focal point F2 of the reflecting surface 543 of the block 513 that is far from the second functional portion 52 with respect to the block 514 that is close to the second functional portion 52 is the optical control unit 54 and the exit surface 55 of the block 514 that are close to the second functional portion 52. Located between and. On the other hand, the focal point F3 of the block 514 close to the second functional portion 52 is located between the second functional portion 52 and the reflecting surface 543.

(Description of refractive surface 544)
The refracting surface 544 is adjacent to the reflecting surface 543 on the side opposite to the second functional portion 52. The refracting surface 544 is an optical control surface that refracts the remaining part of the incident parallel light L2 as the refracted light L8 toward the space 540 side. Further, the refracting surface 544 is incident on the first re-incident surface 541 and the second re-incident surface 542 as the first re-incident light L11 and the second re-incident light L12 as the refracted light L8 refracted toward the space 540 side. This is an optical control surface.

  In this example, the refractive surface 544 is an optical control surface composed of a series of free-form surfaces. The angle formed by the incident parallel light L2 and the refracting surface 544 changes so as to gradually decrease as it approaches the reflecting surface 543 side.

  For this reason, the refraction angle of the refracted light L8 on the refracting surface 544 gradually increases as it approaches the reflecting surface 543 side. Thereby, the refracting surface 544 distributes a part of the refracted light L8 on the reflecting surface 543 side from the first re-incident surface 541 facing the refracting surface 544 to the second re-incident surface 542 facing the reflecting surface 543. Can be incident.

  Here, the incident parallel light L2 and the optical axis Z of the light source 4 are parallel or substantially parallel. The angle and the incident angle of the incident parallel light L2 are in a complementary angle relationship with each other.

(Description of first re-incidence surface 541)
The first re-incidence surface 541 faces the refractive surface 544. The first re-incident surface 541 is an optical control surface of a diffusion system that re-enters a part of the refracted light L8 on the opposite side to the reflective surface 543 as diffused light, that is, first re-incident light L11. The first re-incident light L11 is diffused light that diffuses in the left-right direction with respect to the optical axis Z of the light source 4. Note that the first re-incident light L11 is illustrated in FIG. 1 parallel or substantially parallel to the optical axis Z of the light source 4.

  In this example, the first re-incidence surface 541 is a so-called vertical Kama prism composed of a part of a cylindrical inner surface having an axis in the vertical direction. The first re-incidence surface 541 may be a concave surface, a convex surface, or a continuous uneven surface.

(Description of second re-incident surface 542)
The second re-incident surface 542 faces the reflective surface 543. The second re-incident surface 542 is a refractive optical control surface that re-enters a part of the refracted light L8 on the reflective surface 543 side as refracted light, that is, second re-incident light L12. The second re-incident light L12 is refracted (corrected) in parallel or substantially parallel to the optical axis Z of the light source 4 (front direction or substantially front direction, or the same direction or substantially the same direction as the incident parallel light L2). Light. In this example, the second re-incidence surface 542 is formed of a series of surfaces (a single continuous surface) without a draft surface (an inclined surface or a step surface).

(Description of the exit surface 55)
The exit surface 55 is provided on the surface on the opposite side of the entrance surface 53 among the four blocks 511 to 514 of the first functional portion 51 of the light guide member 5. The exit surface 55 is light optically controlled by the optical control unit 54 (the first re-incident light L11 re-incident on the first re-incident surface 541 and the second re-incident light re-incident on the second re-incident surface 542). L12) and the reflected parallel light L6 reflected by the parallel light reflecting surface 56 are emitted to the outside (that is, the lamp lens 3 side and the rear side of the vehicle C) as the emitted light L9.

  In this example, the emission surface 55 is a so-called vertical Kama prism composed of a part of a cylindrical surface having an axis in the vertical direction. That is, the emission surface 55 is a concave surface, a convex surface, or a continuous uneven surface. Accordingly, the emitted light L9 diffuses in the left-right direction with respect to the optical axis Z of the light source 4. The emitted light L9 is shown in FIG. 1 in parallel or substantially parallel to the optical axis Z of the light source 4.

(Description of the second functional portion 52)
The second functional part 52 is integrally provided in the left-right direction at both left and right ends of the first functional part 51 of the light guide member 5. The second function portion 52 reflects the reflected light L7 reflected by the reflecting surface 543 of the optical control unit 54 of the first function portion 51 from the first function portion 51 of the second function portion 52 to the second function by total reflection. It leads to the left and right ends of the portion 52.

  That is, the 2nd functional part 52 is a light guide rod, a light guide, and a light guide. The second functional portion 52 has a circular or nearly circular cylindrical shape, that is, a round bar shape. The diameter (basic diameter) of the second functional portion 52 is about 5 to 8 mm in this example.

  An emission surface 520 is provided on the side surface of the second functional portion 52 facing the lamp lens 3 side. As shown in FIGS. 1 and 7, the emission surface 520 reflects a part of the light L7 reflected from the first functional portion 51 to the second functional portion 52 and guided into the second functional portion 52. The emitted light L10 is emitted to the outside (that is, the lamp lens 3 side and the rear side of the vehicle C). The exit surface 520 reflects the remainder of the reflected light L7 into the second functional portion 52 by a total reflection action.

  A reflection surface 521 and a step surface 522 are provided on the side surface of the second functional portion 52 and on the surface opposite to or substantially opposite to the emission surface 520. A large number of reflection surfaces 521 and step surfaces 522 are provided alternately in the direction of the center line O of the second functional portion 52. The reflection surface 521 reflects a part of the reflected light L7 to the emission surface 520 side as reflected light L13. The reflected light L13 is emitted to the outside as outgoing light L10 from the outgoing surface 520. One reflecting surface 521 and one step surface 522 constitute one prism.

(Description of light / dark difference mitigating portion 57)
As shown in FIGS. 1 and 5, the light guide member 5 is provided with a light / dark difference reducing portion 57. The brightness difference reducing portion 57 is provided from the boundary between the first functional portion 51 and the second functional portion 52 of the light guide member 5 to the first functional portion 51 and the second functional portion 52.

  As shown in FIGS. 1 and 5, the light / dark difference mitigating portion 57 is formed by the bright portion of the first functional portion 51 and the second functional portion 52 of the light guide member 5 by the incident direct light L4 from the third incident surface 533. This is to relieve the difference in brightness between dark areas. That is, the brightness increases from the bright part at the center of the first functional part 51 of the light guide member 5 to the dark part at the end part of the second functional part 52 through the bright part in the middle of the contrast difference reducing part 57. It is gradually changing. In FIG. 5, the portion where the black spots are dense is a bright portion. The portion where the black spots are sparse is a dark portion.

  Here, the brightness of the outgoing light L9 emitted from the outgoing surface 55 of the first functional part 51 and the outgoing lights L5 and L10 emitted from the outgoing surface 520 of the second functional part 52 will be described with reference to FIG. ,explain. In FIG. 1, the emitted lights L9, L5, and L10 are illustrated by solid arrows. When the solid line arrows are dense, the emitted light is bright. When the solid line arrow is sparse, the emitted light is dark.

  First, the light optically controlled by the optical control unit 54, that is, the first re-incident light L11 and the second re-incident light L12 are direct light from the light source 4 in the light source light L1. For this reason, the outgoing light L9 composed of the first re-incident light L11 and the second re-incident light L12 is bright.

  The reflected parallel light L6 reflected by the parallel light reflecting surface 56 is reflected light from the light source 4 in the light source light L1. For this reason, the outgoing light L9 made of the reflected parallel light L6 is darker than the outgoing light L9 made of the first re-incident light L11 and the second re-incident light L12.

  The reflected parallel light L6 includes reflected parallel light L6 in which incident refracted light L3 from the second incident surface 532 is reflected by the parallel light reflecting surface 56, and incident direct light L4 from the third incident surface 533 in the parallel light reflecting surface 56. And reflected parallel light L6 reflected by. Of the outgoing light L9 made of the reflected parallel light L6, the outgoing light L9 made of the reflected parallel light L6 of the incident direct light L4 is darker than the outgoing light L9 made of the reflected parallel light L6 of the incident refracted light L3.

  On the other hand, the outgoing light L5 that is the incident direct light L4 and is emitted from the outgoing surface 520 of the second functional portion 52 is darker than the outgoing light L9 that is the reflected parallel light L6 of the incident direct light L4.

  Further, the reflected light L7 that is reflected by the reflecting surface 521 of the second functional portion 52 and is emitted from the emitting surface 520 is the incident direct light L4 that is emitted from the emitting surface 520 of the second functional portion 52. It is darker than the outgoing light L5.

  In this way, from the bright outgoing light L9 at the central portion of the first functional portion 51 of the light guide member 5 through the bright outgoing lights L9 and L5 in the middle of the light / dark difference reducing portion 57, the end portion of the second functional portion 52 The brightness gradually changes to the dark emitted light L10.

(Description of the operation of the first embodiment)
The vehicular optical member (hereinafter referred to as “light guide member 5”) and the vehicular lamp 1 according to the first embodiment are configured as described above, and the operation thereof will be described below.

  The light emitting parts 41 of the four light sources 4 are turned on simultaneously. Then, the light source light L1 radiated from the light emitting unit 41 of the light source 4 is the incident parallel light L2, the incident refracted light L3, and the incident direct light L4, and the four blocks 511 to 511 of the first functional portion 51 of the light guide member 5. The light enters the light guide member 5 from the first incident surface 531, the second incident surface 532, and the third incident surface 533.

  A part of the incident parallel light L2 is reflected by the reflection surface 543 of the optical control unit 54 as reflected light L7 toward the focal points F2 and F3. The reflected light L7 converges once toward the focal points F2 and F3 and radiates from the focal points F2 and F3 into the second functional portion 52. That is, the reflected light L7 is emitted into the second functional portion 52 using the focal points F2 and F3 as virtual light sources.

  The remainder of the incident parallel light L2 is refracted to the space 540 side of the optical control unit 54 as refracted light L8 at the refractive surface 544 of the optical control unit 54. A part of the refracted light L8 re-enters the first re-incident surface 541 of the optical control unit 54 as the diffused first re-incident light L11. The remainder of the refracted light L8 reenters the second re-incident surface 542 of the optical control unit 54 as the second re-incident light L12 of the refracted light.

  The first re-incident light L11 and the second re-incident light L12 are irradiated to the rear side of the vehicle C to the outside through the lamp lens 3 as the brightest outgoing light L9 from the emission surface 55 of the first functional portion 51. .

  The incident refracted light L3 is reflected by the parallel light reflecting surface 56 as reflected parallel light L6. The reflected parallel light L6 is the second brightest outgoing light L9 from the outgoing surface 55 of the first functional part 51, and passes through the lamp lens 3 on the left and right sides or the left or right side of the brightest outgoing light L9. The back side is irradiated.

  Part of the incident direct light L4 is reflected by the parallel light reflecting surface 56 as reflected parallel light L6. The reflected parallel light L6 is the third brightest outgoing light L9 as the third brightest outgoing light L9 from the outgoing face 55 of the first functional part 51 adjacent to the second functional part 52, that is, the outgoing face 55 of the contrast difference reducing part 57. On the right side or the left side of the vehicle C, the light is irradiated to the rear side of the vehicle C through the lamp lens 3.

  The remainder of the incident direct light L4 is the third brightest outgoing light L5 as the fourth brightest outgoing light L5 from the outgoing surface 520 of the second functional part 52 adjacent to the first functional part 51, that is, the outgoing face 520 of the contrast difference reducing part 57. On the right side or the left side of the incident light L9, the light is irradiated to the rear side of the vehicle C through the lamp lens 3.

  The reflected light L7 radiated into the second functional part 52 using the focal points F2 and F3 as virtual light sources is transmitted from the first functional part 51 of the second functional part 52 to the second functional part 52 by total reflection in the second functional part 52. Guided to the left and right ends of the functional part 52. The reflected light L7 is reflected by the reflecting surface 521 as reflected light L13 in the middle of the second functional portion 52.

  The reflected light L13 is the fifth brightest outgoing light L10 from the outgoing surface 520 of the second functional portion 52, and passes through the lamp lens 3 on the right side or the left side of the fourth brightest outgoing light L5, and then to the rear side of the vehicle C. Is irradiated. The emitted light L <b> 10 gradually darkens from the brightness difference reducing portion 57 adjacent to the first functional portion 51 of the second functional portion 52 to the left and right ends of the second functional portion 52.

  As described above, as shown in FIGS. 1 and 5, the first functional portion 51 at the center portion of the vehicular lamp 1 is bright and bears the light distribution function of the high-mount stop lamp. Moreover, the 2nd functional part 52 of the right-and-left both ends part of the vehicle lamp 1 becomes dark gradually from the 1st functional part 51 to the left-right both ends, and bears a decoration (decoration) function. Further, a light / dark difference reducing portion 57 between the bright first functional portion 51 at the central portion and the second functional portion 52 gradually darkening at both left and right end portions relieves the light / dark difference.

(Description of the effect of Embodiment 1)
The light guide member 5 and the vehicular lamp 1 according to the first embodiment are configured and operated as described above, and the effects thereof will be described below.

  In the light guide member 5 and the vehicle lamp 1 according to the first embodiment, the refractive surface 544, which is the first optical control unit of the optical control unit 54, the first re-incident surface 541, and the second re-incident surface 542 are incident parallel light. A part of L2 is optically controlled toward the exit surface 55 of the first functional part 51, and the reflecting surface 543, which is the second optical control unit of the optical control unit 54, uses the remaining part of the incident parallel light L2 as the second function. Optical control is performed toward the portion 52. For this reason, the light guide member 5 and the vehicular lamp 1 according to the first embodiment can reduce the occurrence of unevenness of light as well as the use efficiency of the light, like the conventional light guide and vehicle lamp. Improvements can be made. Moreover, in the light guide member 5 and the vehicle lamp 1 according to the first embodiment, the optical control unit 54 is configured by the wall surface of the space portion 540 provided between the incident surface 53 and the output surface 55. Unlike conventional light guides and vehicle lamps, no connecting surface or processed curved portion is formed. As a result, in the light guide member 5 and the vehicle lamp 1 according to the first embodiment, light leakage occurs due to the connecting surface and the processed curved portion, and spotlight is generated or a dark portion is generated. Can be prevented.

  In the light guide member 5 and the vehicular lamp 1 according to the first embodiment, a part of the incident surface 53 is a first incident surface of a parallel light incident surface on which the light source light L1 from the light source 4 is incident as incident parallel light L2. is there. Further, in the light guide member 5 and the vehicle lamp 1 according to the first embodiment, the reflection surface 543 has the focal points F2 and F3 located between the incident surface 53 and the emission surface 55, and the incident parallel light L2 is focused on the focal point F2. , F3 is a parabolic optical control surface that reflects toward F3. For this reason, the light guide member 5 and the vehicle lamp 1 according to the first embodiment once converges the reflected light L7, which is a part of the incident parallel light L2 and reflected by the reflecting surface 543, at the focal points F2 and F3. And radiate from the focal points F2, F3. Thereby, the light guide member 5 and the vehicular lamp 1 according to the first embodiment can reliably enter the reflected light L7 into the second functional portion 52 using the focal points F2 and F3 as virtual light sources, and the reflected light. L7 can be effectively used for the decoration function of the second functional portion 52.

  In the light guide member 5 and the vehicular lamp 1 according to the first embodiment, the first functional part 51 includes a plurality of (four in this example) blocks 511 to 514, and the four blocks 511 to 514 includes an incident surface 53, an optical control unit 54, and an exit surface 55, respectively. Among the four blocks 511 to 514, the second block 511 and 514 is closer to the second functional part 52. The focal point F2 of the reflecting surface 543 that is the second optical control unit of the blocks 512 and 513 far from the functional part 52 is between the optical control unit 54 and the emission surface 55 of the blocks 511 and 514 that are close to the second functional part 52. Located in. For this reason, the light guide member 5 and the vehicular lamp 1 according to the first embodiment provide the second functional portion 52 with the reflected light L7 from the reflecting surface 543 of the blocks 512 and 513 separated from the second functional portion 52. It can pass between the optical control part 54 of the near blocks 511 and 514 and the output surface 55. Thereby, the light guide member 5 and the vehicular lamp 1 according to the first embodiment have the plurality of blocks 511 to 514 provided from the reflecting surface 543 of the blocks 512 and 513 apart from the second functional portion 52. The size between the optical control unit 54 and the exit surface 55 of the blocks 511 and 514 close to the second functional portion 52 can be reduced without hindering the passage of the reflected light L7. As a result, the depth of the light guide member 5 and the depth of the vehicular lamp 1 can be reduced.

  The light guide member 5 and the vehicular lamp 1 according to the first embodiment are the other part of the incident surface 53 and the third incident on the reflective direction side of the reflective surface 543, that is, the side facing the second functional portion 52. The surface 533 is a linear light incident surface on which the light source light L1 from the light source 4 is incident as the incident direct light L4. Therefore, in the light guide member 5 and the vehicle lamp 1 according to the first embodiment, a part of the incident direct light L4 from the third incident surface 533 is reflected as the reflected parallel light L6 by the parallel light reflecting surface 56, and The reflected parallel light L6 is emitted as outgoing light L9 from the outgoing surface 55 of the first functional part 51 near the second functional part 52. On the other hand, in the light guide member 5 and the vehicle lamp 1 according to the first embodiment, the remainder of the incident direct light L4 from the third incident surface 533 is from the emission surface 520 of the second functional portion 52 near the first functional portion 51. The light is emitted as outgoing light L5.

  Thereby, the light guide member 5 and the vehicular lamp 1 according to the first embodiment include the bright first functional portion 51 at the center portion of the light guide member 5 and the dark second functional portion at the left and right end portions of the light guide member 5. A light / dark difference reducing portion 57 having an intermediate brightness is formed between the first and second light sources. As a result, in the light guide member 5 and the vehicle lamp 1 according to the first embodiment, the brightness is reduced from the bright first functional portion 51 at the central portion of the light guide member 5 to the brightness difference reduction portion 57 having an intermediate brightness. After that, gradually changing illumination is obtained to the dark second functional portion 52 at the left and right end portions of the light guide member 5.

  In the light guide member 5 and the vehicle lamp 1 according to the first embodiment, in the optical control unit 54 between the entrance surface 53 and the exit surface 55, the reflection surface 543 reflects a part of the incident light (incident parallel light L2). The light is reflected, and the refracting surface 544 refracts the remaining part of the incident light (incident parallel light L2) toward the space 540 and re-enters the first re-incident surface 541 and the second re-incident surface 542, respectively. . That is, in the light guide member 5 and the vehicle lamp 1 according to the first embodiment, a part of the refracted light L8 from the refracting surface 544 can be reincident on the second re-incident surface 542 facing the reflecting surface 543. . For this reason, the light guide member 5 and the vehicular lamp 1 according to the first embodiment are the cases where the reflecting surface 543 is provided on the wall surface of the space portion 540 of the optical control unit 54, as shown in FIGS. However, it is possible to prevent the dark portion from being formed by the reflective surface 543.

  In the light guide member 5 and the vehicle lamp 1 according to the first embodiment, the angle formed by the optical axis Z of the light source 4 and the refractive surface 544 is such that the refractive angle of the refracted light L8 on the refractive surface 544 approaches the reflective surface 543 side. It is changing so that it grows larger. Therefore, in the light guide member 5 and the vehicle lamp 1 according to the first embodiment, a part of the refracted light L8 from the refracting surface 544 on the reflecting surface 543 side is opposed to the refracting surface 544. The light can be distributed and incident on the second re-incidence surface 542 facing the reflection surface 543 from 541. Thereby, the light guide member 5 and the vehicular lamp 1 according to the first embodiment can surely prevent the formation of a dark portion by the reflecting surface 543.

  In the light guide member 5 and the vehicle lamp 1 according to the first embodiment, the refractive surface 544 is an optical control surface formed of a series of free-form surfaces. Here, when a plurality of triangular prisms are continuously provided with a refracting surface, a dark portion is formed by a drawing surface (inclined surface, stepped surface) or a processing curved portion (processing R, processing curved surface). For this reason, the light guide member 5 and the vehicular lamp 1 according to the first embodiment ensure the formation of the dark portion by the cut surface and the processed curved portion, as compared with the case where the refractive surface is continuously provided with a plurality of triangular prisms. Can be prevented. Thereby, the light guide member 5 and the vehicular lamp 1 according to the first embodiment can more reliably prevent the dark portion from being formed by the reflecting surface 543.

  In the light guide member 5 and the vehicular lamp 1 according to the first embodiment, the first re-incident surface 541 has a part (L8) of the refracted light L8 opposite to the reflective surface 543 on the opposite side (L8). It is an optical control surface of a diffusion system that re-enters as re-incident light L11. Here, since the refracted light L8 refracted by the refracting surface 544 is located at or near the optical axis Z of the light source 4, the light beam is large (the amount of light is large) and the light is strong (the luminous intensity is high). Therefore, the light guide member 5 and the vehicular lamp 1 according to the first embodiment diffuse the refracted light L8 having a large luminous flux and strong light as the first re-incident light L11 on the first re-incident surface 541, and , And can be emitted from the emission surface 55 as emission light L9. Thereby, in the light guide member 5 and the vehicle lamp 1 according to the first embodiment, the light distribution function of the first functional portion 51 can obtain light distribution with equal or substantially uniform brightness.

  In the light guide member 5 and the vehicular lamp 1 according to the first embodiment, the second re-incidence surface 542 has a part of the refracted light L8 on the reflective surface 543 side that is parallel or substantially parallel to the optical axis Z. This is an optical control surface composed of a series of surfaces that are reincident as the second reincident light L12. Here, in the case where the second re-incidence surface is provided continuously by a plurality of triangular prisms, a dark portion is formed by a drawing surface (an inclined surface, a step surface) or a processing curved portion (processing R, processing curved surface). For this reason, in the light guide member 5 and the vehicle lamp 1 according to the first embodiment, compared to the case where the second re-incidence surface is provided by continuously connecting a plurality of triangular prisms, Formation can be reliably prevented. Thereby, the light guide member 5 and the vehicular lamp 1 according to the first embodiment can more reliably prevent the dark portion from being formed by the reflecting surface 543.

(Description of Modification of Refractive Surface 544)
Hereinafter, modified examples of the refractive surface 544 will be described.

  The light guide member 5 and the refracting surface 544 of the vehicular lamp 1 according to the first embodiment are optical control surfaces composed of a series of free-form surfaces. On the other hand, a refractive surface of an optical control surface composed of a plurality of triangular prisms provided alternately and continuously with the extraction surface 545 may be used. Further, it may be a refractive surface of an optical control surface in which a plurality of planes are continuously provided.

(Description of Embodiment 2)
FIG. 8 shows Embodiment 2 of the light guide member and vehicle lamp according to the present invention. Hereinafter, the light guide 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 7 denote the same components.

  As shown in FIGS. 1 to 3, the light guide member 5 and the vehicle lamp 1 according to the first embodiment are provided with a reflective surface 543 on one side, for example, the right side or the left side of the space portion 540 of the optical control unit 54. is there. On the other hand, the light guide member and the vehicular lamp of the second embodiment are provided with reflecting surfaces 543 on both sides of the space portion 540 of the optical control unit 54 as shown in FIG.

  Since the light guide member and the vehicular lamp of the second embodiment are configured as described above, it is possible to achieve the same or substantially the same effect as the light guide member 5 and the vehicular lamp 1 of the first embodiment. it can.

(Embodiments 1 and 2 and description of examples other than modified examples)
In the first embodiment, the first functional part 51 is composed of four blocks 511 to 514. On the other hand, in this invention, the 1st functional part 51 may consist of 1 to 3 blocks or 5 or more blocks. In the case of using one, it is preferable to use one provided with reflecting surfaces 543 on both sides of the space 540 of the optical control unit 54 of the second embodiment. In the case of an even number, it is preferable to use the one provided with the reflecting surface 543 on one side, for example, the right side or the left side of the space 540 of the optical control unit 54 of the first embodiment. Further, in the case of an odd number, the reflective surface 543 is provided on one side, for example, the right side or the left side of the space portion 540 of the optical control unit 54 of the first embodiment, and both sides of the space portion 540 of the optical control unit 54 of the second embodiment. It is preferable to use the one provided with the reflecting surface 543.

  Moreover, in the said Embodiment 1, 2 and a modification, it uses for the high mount stop lamp which has a light distribution function and a decoration (decoration) function. However, in this invention, you may use for lamps other than the high mount stop lamp which has a light distribution function and a decoration (decoration) function. It should be noted that the light source light L1 from the light source 4 is preferably used for a lamp that is distributed and used.

  Further, in the first and second embodiments and the modified examples, the first incident surface 531 is formed of a convex lens surface having the focal point F1 on the optical axis Z and located at the center of the light emitting surface of the light source 4 or substantially at the center. is there. However, in the present invention, the first incident surface may be a surface other than the convex lens surface. For example, it may be composed of a Fresnel lens surface whose focal point is on the optical axis Z and located at or near the center of the light emitting surface of the light source 4.

  In addition, this invention is not limited by the said Embodiment 1, 2 and a modification.

DESCRIPTION OF SYMBOLS 1 Vehicle lamp 1L, 1R Rear combination lamp 2 Lamp housing 3 Lamp lens 4 Light source 40 Board | substrate 41 Light emission part 5 Light guide member 51 1st function part 511, 512, 513, 514 Block 52 2nd function part 520 Output surface 521 Reflection Surface 522 Step surface 53 Incident surface 531 First incident surface 532 Second incident surface 533 Third incident surface 54 Optical control unit 540 Spatial portion 541 First reincident surface 542 Second reincident surface 543 Reflective surface 544 Refractive surface 545 Extraction surface 55 Outgoing surface 56 Parallel light reflecting surface 57 Brightness difference reducing part 6 Bracket 7 Light chamber B Rear BD Back door C Vehicle C1, C2 Space D Lower F Front F1, F2, F3 Focus L Left L1 Light source light L2 Incident parallel light L3 Incident Refracted light L4 Incident direct light L5 Outgoing light L6 Reflected parallel light L7 Reflected light L8 Refracted light 9 1. Re incident light L12 second re-incident light L13 emitted light outgoing light L10 reflected light L11 O centerline P panel R right U on the Z beam axis

Claims (5)

The first functional part and the second functional part are integrated,
The first functional part is:
An incident surface on which light from a light source is incident;
An optical control unit for optically controlling incident light;
An exit surface for emitting optical control light;
With
The second functional part is
An emission surface for emitting the optical control light;
The optical control unit
It is composed of a wall surface of a space provided between the incident surface and the exit surface,
A first optical control unit that optically controls a part of the incident light toward the emission surface of the first functional part;
A second optical control unit that optically controls at least a part of the remaining incident light toward the second functional part;
Having
An optical member for a vehicle characterized by the above. A part of the incident surface is a parallel light incident surface on which light from the light source is incident as parallel light or substantially parallel light,
The second optical control unit has a focal point located between the second functional part and the second optical control unit, and is an optical control surface composed of a parabolic reflecting surface that reflects incident parallel light toward the focal point. Is,
The optical member for vehicles according to claim 1 characterized by things. The first functional part is composed of a plurality of blocks,
Each of the plurality of blocks includes the entrance surface, the optical control unit, and the exit surface.
Of the plurality of blocks, the focal point of the second optical control unit of the block that is away from the second functional part with respect to the block that is close to the second functional part is close to the second functional part Located between the optical controller of the block and the exit surface,
The optical member for vehicles according to claim 2 characterized by things. The incident surface that is another part of the incident surface and faces the second functional portion is a linear light incident surface that allows light from a light source to be incident as linear light or substantially linear light.
The vehicular optical member according to claim 1, wherein the vehicular optical member is a vehicular optical member. A lamp housing and a lamp lens that partition the lamp chamber;
A light source disposed on the lamp housing side in the lamp chamber;
The vehicle optical member according to any one of claims 1 to 4, which is disposed on the lamp lens side in the lamp chamber;
With
The emission surface of the first functional part and the emission surface of the second functional part are opposed to the lamp lens,
The incident surface of the first functional portion faces the light source;
A vehicular lamp characterized by the above.

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