JP6790633B2 - Vehicle optics and vehicle lamps with vehicle optics - Google Patents

Description

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

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

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

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

Japanese Unexamined Patent Publication No. 2014-229466

However, conventional light guides and vehicle lamps have a connecting surface (pulled surface, inclined surface, stepped 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 body and the lamp for the vehicle, light leakage may occur due to the connecting surface or the processed curved portion to generate light, or a dark portion may be generated.

An object to be solved by the present invention is to provide an optical member for a vehicle and a lamp for a vehicle capable of preventing the occurrence of light spots or dark portions 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, and the first functional portion has an incident surface on which light from a light source is incident and optics for optically controlling the incident light. A control unit and an exit surface for emitting optical control light are provided, a second functional portion is provided with an exit surface for emitting optical control light, and a part of the incident surface is at or substantially centered on the light emitting surface of the light source. A parallel light incident surface that causes light emitted from the light source to be incident as incident parallel light that is parallel to or substantially parallel to the optical axis of the light source, and is a space in which an optical control unit is provided between the incident surface and the exit surface. It is composed from the wall parts, a first optical control unit which optically controls toward a portion of the incident parallel light output surface of the first functional part, the rest of the at least a portion of the second functional part of the incident parallel light It is characterized by having a second optical control unit that is optically controlled toward the surface.

In the vehicle optical member of the present invention , the second optical control unit has a focal point located between the second functional unit and the second optical control unit, and a parabolic reflecting surface that reflects incident parallel light toward the focal point. It is characterized in that it is an optical control surface composed of.

In the vehicle optical member of the present invention, the first functional portion is composed of a plurality of blocks, and the plurality of blocks each include an entrance surface, an optical control unit, and an emission surface. Of the blocks, the focus of the second optical control unit of the block that is far from the second functional portion with respect to the block that is close to the second functional portion is the optical control unit and the exit surface of the block that is close to the second functional portion. It is characterized by being located between.

The vehicle optical member of the present invention
Another part of the incident surface, the incident surface facing the second functional portion, is a linear light incident surface that causes the light source light to enter as linear light or substantially linear light.

The vehicle lamp of the present invention includes a lamp housing and a lamp lens for partitioning a lamp chamber, a light source arranged on the lamp housing side in the lamp chamber, and any one of the above arranged on the lamp lens side in the lamp chamber. The vehicle optical member of the present invention is provided, the emission surface of the first functional portion and the emission surface of the second functional portion face the lamp lens, and the incident surface of the first functional portion faces the light source. It is characterized by that.

The vehicle optical member and the vehicle lamp of the present invention can prevent the occurrence of light spots or dark parts due to the connecting surface or the processed curved portion.

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

Hereinafter, two examples of the vehicle optical member and the vehicle lamp according to the present invention will be described in detail with reference to the drawings. In this specification, front, rear, top, bottom, left, and right are front, rear, top, bottom, left, and right when the vehicle optical member and vehicle lamp according to the present invention are mounted on the vehicle. .. In the figure, the code "F" is "front", "B" is "rear", "U" is top, "D" is "bottom", "L" is "left", and "R" is "right". is there. In the figure, hatching of vehicle optical members, light sources, brackets, etc. is omitted.

(Explanation of the configuration of the first embodiment)
1 to 7 show the first embodiment of the vehicle optical member and the vehicle lamp according to the present invention. Hereinafter, the configurations of the vehicle optical member and the vehicle lamp according to the first embodiment will be described. In FIGS. 4 to 7, reference numeral 1 is a vehicle lamp according to the first embodiment.

(Explanation of vehicle lamp 1)
The vehicle lamp 1 is a high mount stop lamp in this example. The vehicle lamp 1 is incorporated in a rear spoiler installed at the rear of the vehicle C (see FIG. 4). The vehicle lamp 1 and the rear spoiler are incorporated in the back door BD of the vehicle C. The vehicle lamp 1 is attached to a panel P (a part of the vehicle body, see FIGS. 6 and 7) constituting the back door BD by 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 vehicle lamp 1 which is a high-mount stop lamp is arranged higher than the rear combination lamps 1L and 1R provided with the stop lamp.

As shown in FIGS. 6 and 7, the vehicle 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. It includes a light guide member (light guide, light guide body, inner lens) 5 as an optical member, and a bracket 6.

The light source 4 and the light guide member 5 are attached to the lamp housing 2 via the bracket 6. The lamp housing 2 is attached to the panel P by an attachment member. The space C1 (see 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 rear portions of the vehicle C). Larger than the space C2 (see FIG. 7) between (corresponding to both sides) and panel P. Therefore, since the central portion of the light guide member 5 has a spatial margin, the light source 4 can be arranged (see FIG. 6). On the other hand, since there is no space between the left and right ends of the light guide member 5, the light source 4 cannot be arranged (see FIG. 7).

(Explanation of Lamp Housing 2 and Lamp Lens 3)
The lamp housing 2 is composed of, for example, a light-impermeable member. The lamp housing 2 has a shape in which the rear portion of the vehicle C is open, while the front portion of the vehicle C is closed.

The lamp lens 3 is composed of, for example, a light-transmitting member. The lamp lens 3 has a shape in which the front portion of the vehicle C is open, while the 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. Further, the lamp chamber 7 is partitioned by the lamp housing 2 and the lamp lens 3. A light source 4, a light guide member 5, and a bracket 6 are arranged in the light chamber 7, respectively.

(Explanation 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 has 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 arranged on the lamp housing 2 side in the lamp chamber 7. In this example, the light emitting unit 41 is a self-luminous semiconductor type light emitting element such as an LED, OEL, or 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 the center 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.

(Explanation of 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 arranged on the lamp lens 3 side in the lamp chamber 7.

The light guide member 5 is composed of a first functional portion 51 and a second functional portion 52. The first functional portion 51 and the second functional portion 52 are integrated. The first functional portion 51 is a central portion of the light guide member 5 and is responsible for the light distribution function of the high mount stop lamp. The second functional portion 52 is both left and right end portions of the light guide member 5, and is responsible for a decoration function.

(Explanation of the first functional part 51)
In this example, the first functional portion 51 is composed of four blocks 511, 512, 513, 514 (hereinafter, simply referred to as "511-514") provided continuously on the left and right sides. There is.

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. Of the four blocks 511 to 514, the two blocks 512 and 513 are blocks that are separated from the second functional portion 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 emitted 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. The configuration of the two blocks 511 and 512 on the left side is symmetrical or substantially symmetrical with respect to the configuration of the two blocks 513 and 514 on the right side. Therefore, the description of the two blocks 511 and 512 on the left side will be omitted.

(Explanation of Incident Surface 53)
The incident surface 53 of the block 513 (512) inside is composed of a first incident surface 531 and a second incident surface 532. The incident surface 53 of the rightmost block 514 (leftmost block 511) is composed of a first incident surface 531, a second incident surface 532, and a third incident surface 533.

The first incident surface 531 which is a part of the incident surface 53 is a convex lens surface whose focal point F1 is located on the optical axis Z and at the center or substantially the center of the light emitting surface of the light source 4 (the hyperbola of the focal point F1 is oriented around the optical axis Z). It consists of a rotating hyperboloid (such as a rotating hyperboloid). 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 parallel to 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 formed of a cylindrical inner surface formed by rotating the optical axis Z as a central axis. The second incident surface 532 causes the light source light L1 to be incident as the 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 formed of a part of a spherical surface centered on or substantially the center of the light emitting surface of the light source 4. Therefore, 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 straight light incident surface.

The third incident surface 533 is an incident surface on the reflection direction side of the reflective surface 543 of the optical control unit 54, and is an incident surface facing the second functional portion 52. A part of the incident direct light L4 from the third incident surface 533 is incident on the second functional portion 52 and emitted as the emitted light L5 from the exit 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 parallel to or substantially parallel to the optical axis Z.

(Explanation of parallel light reflecting surface 56)
The parallel light reflecting surface 56 is composed of a plurality of stages of rotating paraboloids whose focal point (not shown) is located on the optical axis Z and which is located closer to the first incident surface 531 than the focal point F1 of the first incident surface 531. It is a thing. Therefore, the parallel light reflecting surface 56 reflects the remaining part of the incident refracted light L3 and the incident direct light L4 as the reflected parallel light L6 parallel to or substantially parallel to the optical axis Z.

(Explanation of Optical Control Unit 54)
The optical control unit 54 is a wall surface of a space portion 540 provided between the entrance surface 53 and the exit surface 55, and is composed of a part of the optical control surface of the wall surface. The optical control unit 54 has a reflection surface 543, a refraction surface 544, a first re-incident surface 541, and a second re-incident surface 542. The refraction surface 544, the first re-incident surface 541, and the second re-incident surface 542 form a first optical control unit. The reflecting surface 543 constitutes a second optical control unit.

(Explanation of Reflective Surface 543)
The reflecting surface 543 is a reflecting surface that reflects a part of the incident parallel light L2. That is, the reflection surface 543 is a reflection control surface that reflects and controls a part of the incident parallel light L2. The reflecting surface 543 is an optical control surface of a parabolic system (rotating parabolic surface). The focal points F2 and F3 of the reflecting surface 543 are located between the incident surface 53, the parallel light reflecting surface 56, and the emitting surface 55, and between the second functional portion 52 and the reflecting surface 543. Therefore, the reflecting surface 543 reflects a part of the incident parallel light L2 as the reflected light (convergent reflected light) L7 toward the focal points F2 and F3. The reflected light L7 is emitted from the focal points F2 and F3 and is incident on the second functional portion 52. Therefore, the focal points F2 and F3 act as virtual light sources.

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

(Explanation of refracting surface 544)
The refracting surface 544 is adjacent to the reflecting surface 543 on the opposite side of 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 portion 540 side. Further, the refracting surface 544 is incident on the first re-incident surface 541 and the second re-incident surface 542, respectively, with the refracted light L8 refracted toward the space portion 540 side as the first re-incident light L11 and the second re-incident light L12. It is an optical control surface to be made to.

The refracting surface 544 is, in this example, an optical control surface composed of a series of free curved 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.

Therefore, the refraction angle of the refracted light L8 on the refracting surface 544 gradually increases as it approaches the reflecting surface 543 side. As a result, the refracting surface 544 distributes a part of the refracted light L8 on the reflecting surface 543 side from the first reincident surface 541 facing the refracting surface 544 to the second reincident 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. Further, the above-mentioned angle and the incident angle of the incident parallel light L2 have a complementary angle relationship with each other.

(Explanation of the first re-incident surface 541)
The first re-incident surface 541 faces the refraction surface 544. The first re-incident surface 541 is an optical control surface of a diffusion system in which a part of the refracted light L8 on the opposite side of the reflecting surface 543 is re-incident as diffused light, that is, the first re-incident light L11. The first re-incident light L11 is diffused light diffused in the left-right direction with respect to the optical axis Z of the light source 4. The first re-incident light L11 is shown in FIG. 1 in parallel with or substantially parallel to the optical axis Z of the light source 4.

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

(Explanation of the second re-incident surface 542)
The second re-incident surface 542 faces the reflection surface 543. The second re-incident surface 542 is an optical control surface of the refraction system that re-incidents a part of the refracted light L8 on the reflecting surface 543 side as the refracted light, that is, the 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). It is light. In this example, the second re-incident surface 542 is composed of a series of surfaces (one continuous surface) having no punched surface (inclined surface, stepped surface).

(Explanation of the exit surface 55)
The exit surface 55 is provided on the surface of the four blocks 511 to 514 of the first functional portion 51 of the light guide member 5 that is opposite to the incident surface 53. The exit surface 55 includes light optically controlled by the optical control unit 54 (first re-incident light L11 re-incident on the first re-incident surface 541 and 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 exit surface 55 is a so-called vertical prism that is formed of a part of a cylindrical surface having an axis in the vertical direction. That is, the exit surface 55 is a concave surface, a convex surface, and a continuous uneven surface. Therefore, the emitted light L9 is diffused 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 with or substantially parallel to the optical axis Z of the light source 4.

(Explanation of the second functional part 52)
The second functional portion 52 is integrally provided on the left and right ends of the first functional portion 51 of the light guide member 5 in the left-right direction. The second functional portion 52 causes the reflected light L7 reflected by the reflecting surface 543 of the optical control unit 54 of the first functional portion 51 to be totally reflected from the first functional portion 51 to the second function of the second functional portion 52. It leads to the left and right ends of the portion 52.

That is, the second functional portion 52 is a light guide rod, a light guide body, and a light guide. The second functional portion 52 has a circular or substantially 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 exit 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 exit surface 520 is the reflected light L7 reflected from the first functional portion 51 to the second functional portion 52, and is a part of the light 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 rest of the reflected light L7 into the second functional portion 52 by a total reflection action.

A reflecting surface 521 and a stepped surface 522 are provided on the side surface of the second functional portion 52, which is opposite to or substantially opposite to the exit surface 520. A large number of reflecting surfaces 521 and stepped surfaces 522 are alternately and continuously provided in the center line O direction of the second functional portion 52. The reflecting surface 521 reflects a part of the reflected light L7 as the reflected light L13 toward the emitting surface 520 side. The reflected light L13 is emitted to the outside as the emitted light L10 from the emitting surface 520. One reflecting surface 521 and one stepped surface 522 form one prism.

(Explanation of light-dark difference mitigation portion 57)
As shown in FIGS. 1 and 5, the light guide member 5 is provided with a light / dark difference mitigation portion 57. The light-dark difference mitigation 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 mitigation 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 due to the incident direct light L4 from the third incident surface 533. It alleviates the difference in brightness between the dark part and the dark part. That is, the brightness increases from the bright portion of the central portion of the first functional portion 51 of the light guide member 5 to the dark portion of the end portion of the second functional portion 52 through the bright portion in the middle of the light-dark difference mitigation portion 57. It is changing gradually. In FIG. 5, the portion where the black dots are dense is a bright portion. The part where the sunspots are sparse is the dark part.

Here, with reference to FIG. 1, the light and darkness of the emission light L9 emitted from the emission surface 55 of the first functional portion 51 and the emission lights L5 and L10 emitted from the emission surface 520 of the second functional portion 52. ,explain. In FIG. 1, the emitted lights L9, L5, and L10 are illustrated by solid arrows. When the solid arrow is dense, the emitted light is bright. If the solid 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 is the direct light from the light source 4 of the light source light L1. Therefore, the emitted light L9 composed of the first re-incident light L11 and the second re-incident light L12 is bright.

Further, the reflected parallel light L6 reflected by the parallel light reflecting surface 56 is the reflected light from the light source 4 of the light source light L1. Therefore, the emitted light L9 composed of the reflected parallel light L6 is darker than the emitted light L9 composed of the first re-incident light L11 and the second re-incident light L12.

In the reflected parallel light L6, the reflected parallel light L6 in which the incident refracted light L3 from the second incident surface 532 is reflected by the parallel light reflecting surface 56 and the incident direct light L4 from the third incident surface 533 are parallel light reflecting surfaces 56. It is composed of reflected parallel light L6 reflected by. Of the emitted light L9 composed of the reflected parallel light L6, the emitted light L9 composed of the reflected parallel light L6 of the incident direct light L4 is darker than the emitted light L9 composed of the reflected parallel light L6 of the incident refracted light L3.

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

Further, the emitted light L10 which is the reflected light L7 and is reflected by the reflecting surface 521 of the second functional portion 52 and emitted from the emitting surface 520 is the incident direct light L4 and is emitted from the emitting surface 520 of the second functional portion 52. It is darker than the emitted light L5.

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

(Explanation of operation of Embodiment 1)
The vehicle optical member (hereinafter, referred to as "light guide member 5") and the vehicle lamp 1 according to the first embodiment have the above-mentioned configurations, and the operation thereof will be described below.

The light emitting units 41 of the four light sources 4 are turned on at the same time. Then, the light source light L1 emitted 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 of the first functional portion 51 of the light guide member 5 It is incident on the light guide member 5 from the first incident surface 531 of 514, the second incident surface 532, and the third incident surface 533.

A part of the incident parallel light L2 is reflected toward the focal points F2 and F3 as the reflected light L7 by the reflecting surface 543 of the optical control unit 54. 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 radiates into the second functional portion 52 with the focal points F2 and F3 as virtual light sources.

The rest of the incident parallel light L2 is refracted as refracted light L8 at the refracting surface 544 of the optical control unit 54 toward the space portion 540 side of the optical control unit 54. A part of the refracted light L8 is re-incident on the first re-incident surface 541 of the optical control unit 54 as the first re-incident light L11 of the diffused light. The rest of the refracted light L8 is re-incident on 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 emitted to the outside through the lamp lens 3 as the brightest emitted light L9 from the emitting surface 55 of the first functional portion 51 to the rear side of the vehicle C. ..

The incident refracted light L3 is reflected by the parallel light reflecting surface 56 as the reflected parallel light L6. The reflected parallel light L6 is the second brightest emitted light L9 from the emitting surface 55 of the first functional portion 51, and the vehicle C is passed through the lamp lens 3 on both the left and right sides or the left or right side of the brightest emitted light L9. It is irradiated to the rear side.

A part of the incident direct light L4 is reflected by the parallel light reflecting surface 56 as the reflected parallel light L6. The reflected parallel light L6 is the second brightest emission light L9 as the third brightest emission light L9 from the emission surface 55 of the first function portion 51 adjacent to the second function portion 52, that is, the emission surface 55 of the light / dark difference mitigation portion 57. On the right side or the left side of the vehicle C, the rear side of the vehicle C is irradiated to the outside through the lamp lens 3.

The rest of the incident direct light L4 is the third brightest emission light L5 from the emission surface 520 of the second functional portion 52 adjacent to the first functional portion 51, that is, the emission surface 520 of the light / dark difference mitigation portion 57. On the right side or the left side of the light emission L9, the rear side of the vehicle C is irradiated to the outside through the lamp lens 3.

The reflected light L7 radiated into the second functional portion 52 with the focal points F2 and F3 as virtual light sources is totally reflected in the second functional portion 52 from the first functional portion 51 to the second of the second functional portion 52. It is guided to the left and right ends of the functional portion 52. Further, the reflected light L7 is reflected by the reflecting surface 521 as the reflected light L13 in the middle of the second functional portion 52.

The reflected light L13 is the fifth brightest emitted light L10 from the emitting surface 520 of the second functional portion 52, and is on the right side or the left side of the fourth brightest emitted light L5, passes through the lamp lens 3, and is externally rearward of the vehicle C. Is irradiated to. The emitted light L10 gradually darkens from the light / dark difference mitigation 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 of the central portion of the vehicle lighting fixture 1 is bright and bears the light distribution function of the high mount stop lamp. Further, the second functional portion 52 of the left and right end portions of the vehicle lamp 1 gradually becomes darker from the first functional portion 51 to the left and right end portions, and plays a decorative function. Further, the light-dark difference mitigation portion 57 of the portion between the bright first functional portion 51 in the central portion and the second functional portion 52 in the left and right end portions gradually darkens the light-dark difference.

(Explanation of Effect of Embodiment 1)
The light guide member 5 and the vehicle lamp 1 according to the first embodiment have the above-mentioned configuration and operation, and the effects thereof will be described below.

In the light guide member 5 and the vehicle lighting tool 1 according to the first embodiment, the refraction surface 544, the first re-incident surface 541, and the second re-incident surface 542, which are the first optical control units of the optical control unit 54, are incident parallel light. A part of L2 is optically controlled toward the exit surface 55 of the first function portion 51, and the reflection surface 543, which is the second optical control unit of the optical control unit 54, secondly functions the remaining part of the incident parallel light L2. Optical control is performed toward the portion 52. Therefore, the light guide member 5 and the vehicle lamp 1 according to the first embodiment can reduce the occurrence of light unevenness and improve the light utilization efficiency, similarly to the conventional light guide and the vehicle lamp. It can be improved. Moreover, since the light guide member 5 and the vehicle lamp 1 according to the first embodiment are composed of the wall surface of the space portion 540 in which the optical control unit 54 is provided between the entrance surface 53 and the exit 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 to generate light, or a dark portion is generated. Can be prevented.

In the light guide member 5 and the vehicle lamp 1 according to the first embodiment, a part of the incident surface 53 is a first incident surface of the parallel light incident surface on which the light source light L1 from the light source 4 is incident as the incident parallel light L2. is there. Further, in the light guide member 5 and the vehicle lighting tool 1 according to the first embodiment, the reflection surface 543 is located between the focal points F2 and F3 between the incident surface 53 and the exit surface 55, and the incident parallel light L2 is focused on the focal point F2. , A parabolic optical control surface that reflects toward F3. Therefore, the light guide member 5 and the vehicle lighting tool 1 according to the first embodiment are a part of the incident parallel light L2, and the reflected light L7 reflected by the reflecting surface 543 is once converged on the focal points F2 and F3. It is made to radiate from the focal points F2 and F3. As a result, the light guide member 5 and the vehicle lamp 1 according to the first embodiment can reliably incident the reflected light L7 into the second functional portion 52 with 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 vehicle lighting tool 1 according to the first embodiment, the first functional portion 51 is composed of a plurality of (four in this example) blocks 511 to 514, and the four blocks 511 to 511. The 514 has an incident surface 53, an optical control unit 54, and an exit surface 55, respectively, and is the second of the four blocks 511 to 514 with respect to the blocks 511 and 514 which are close to the second functional portion 52. The focal point F2 of the reflection surface 543, which is the second optical control unit of the blocks 512 and 513 away from the functional portion 52, is between the optical control unit 54 and the exit surface 55 of the blocks 511 and 514 near the second functional portion 52. Located in. Therefore, the light guide member 5 and the vehicle lamp 1 according to the first embodiment transfer the reflected light L7 from the reflecting surface 543 of the blocks 512 and 513 away from the second functional portion 52 to the second functional portion 52. It can be passed between the optical control unit 54 of the nearby blocks 511 and 514 and the exit surface 55. As a result, even if a plurality of blocks 511 to 514 are provided, the light guide member 5 and the vehicle lighting tool 1 according to the first embodiment are separated from the second functional portion 52 from the reflecting surface 543 of the blocks 512 and 513. The dimension between the optical control unit 54 and the exit surface 55 of the blocks 511 and 514 near the second functional portion 52 can be reduced without obstructing the passage of the reflected light L7. As a result, the depth of the light guide member 5 and the depth of the vehicle lamp 1 can be reduced.

The light guide member 5 and the vehicle lighting tool 1 according to the first embodiment are other parts of the incident surface 53, and are the third incident on the reflection direction side of the reflection 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 lighting tool 1 according to the first embodiment, a part of the incident direct light L4 from the third incident surface 533 is reflected by the parallel light reflecting surface 56 as the reflected parallel light L6. The reflected parallel light L6 is emitted as the emitted light L9 from the emitting surface 55 of the first functional portion 51 near the second functional portion 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 exit surface 520 of the second functional portion 52 closer to the first functional portion 51. It is emitted as emitted light L5.

As a result, the light guide member 5 and the vehicle lamp 1 according to the first embodiment have a bright first functional portion 51 in the central portion of the light guide member 5 and a dark second functional portion in the left and right end portions of the light guide member 5. A light-dark difference mitigation portion 57 having an intermediate brightness is formed between the light and the 52. As a result, in the light guide member 5 and the vehicle lighting fixture 1 according to the first embodiment, the brightness is from the bright first functional portion 51 in the central portion of the light guide member 5 to the light / dark difference mitigation portion 57 having an intermediate brightness. Then, 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 lighting tool 1 according to the first embodiment, in the optical control unit 54 between the incident surface 53 and the exit surface 55, the reflecting surface 543 emits a part of the incident light (incident parallel light L2). After being reflected, the refracting surface 544 refracts the remaining part of the incident light (incident parallel light L2) toward the space portion 540 and re-incidents the first re-incident surface 541 and the second re-incident surface 542, respectively. .. That is, the light guide member 5 and the vehicle lamp 1 according to the first embodiment can re-enter a part of the refracted light L8 from the refracting surface 544 to the second re-incident surface 542 facing the reflecting surface 543. .. Therefore, in the light guide member 5 and the vehicle lamp 1 according to the first embodiment, as shown in FIGS. 1 and 3, a reflection surface 543 is provided on the wall surface of the space portion 540 of the optical control unit 54. However, it is possible to prevent the dark portion from being formed by the reflecting 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 refraction surface 544 is closer to the refraction surface 543 side of the refraction light L8 on the refraction surface 544. It is changing so that it grows as it grows. 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 a first reincident surface facing the refracting surface 544. It can be distributed from 541 to the second re-incident surface 542 facing the reflection surface 543 to be incident. Thereby, the light guide member 5 and the vehicle lamp 1 according to the first embodiment can surely prevent the formation of the dark portion by the reflecting surface 543.

In the light guide member 5 and the vehicle lamp 1 according to the first embodiment, the refraction surface 544 is an optical control surface formed of a series of free curved surfaces. Here, when a plurality of triangular prisms are continuously provided with a refracting surface, a dark portion is formed by a punched surface (inclined surface, stepped surface) and a processed curved surface (processed R, processed curved surface). Therefore, the light guide member 5 and the vehicle lamp 1 according to the first embodiment ensure the formation of a dark portion by the punched surface and the processed curved portion, as compared with the case where a plurality of triangular prisms are continuously provided with a refracting surface. Can be prevented. As a result, the light guide member 5 and the vehicle lamp 1 according to the first embodiment can more reliably prevent the formation of a dark portion due to the reflecting surface 543.

In the light guide member 5 and the vehicle lamp 1 according to the first embodiment, the first re-incident surface 541 is the first part (L8) of the refracted light L8 on the opposite side to the reflecting surface 543 of the diffused light. This is an optical control surface of a diffusion system that is re-incident as the 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, it has a large luminous flux (a large amount of light) and a strong light (high luminous intensity). Therefore, in the light guide member 5 and the vehicle lamp 1 according to the first embodiment, the refracted light L8 having a large luminous flux and strong light is diffused as the first re-incident light L11 on the first re-incident surface 541. , It can be emitted as emitted light L9 from the emitting surface 55. As a result, the light guide member 5 and the vehicle lamp 1 according to the first embodiment can obtain light distribution of uniform or substantially uniform brightness in the light distribution function of the first functional portion 51.

In the light guide member 5 and the vehicle lighting tool 1 according to the first embodiment, the second re-incident surface 542 is a refracted light in which a part of the refracted light L8 on the reflecting surface 543 side is parallel to or substantially parallel to the optical axis Z. It is an optical control surface including a series of surfaces to be re-incident as the second re-incident light L12. Here, when a plurality of triangular prisms are continuously provided with a second re-incident surface, a dark portion is formed by a punched surface (inclined surface, stepped surface) and a processed curved surface (processed R, processed curved surface). Therefore, the light guide member 5 and the vehicle lamp 1 according to the first embodiment have a dark portion due to a punched surface or a processed curved portion, as compared with a case where a plurality of triangular prisms are continuously provided with a second re-incident surface. The formation can be reliably prevented. As a result, the light guide member 5 and the vehicle lamp 1 according to the first embodiment can more reliably prevent the formation of a dark portion due to the reflecting surface 543.

(Explanation of a modified example of the refracting surface 544)
Hereinafter, a modified example of the refracting surface 544 will be described.

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

(Explanation of Embodiment 2)
FIG. 8 shows a second embodiment of a light guide member and a 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 indicate the same ones.

As shown in FIGS. 1 to 3, the light guide member 5 and the vehicle lamp 1 of the first embodiment are provided with a reflecting 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, as shown in FIG. 8, the light guide member and the vehicle lamp of the second embodiment are provided with reflection surfaces 543 on both sides of the space portion 540 of the optical control unit 54, respectively.

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

(Explanation of Examples other than Embodiments 1 and 2 and Modified Examples)
In the first embodiment, the first functional portion 51 is composed of four blocks 511 to 514. On the other hand, in the present invention, the first functional portion 51 may be composed of 1 to 3 blocks or 5 or more blocks. In the case of one, it is preferable to use one in which reflection surfaces 543 are provided on both sides of the space portion 540 of the optical control unit 54 of the second embodiment. Further, in the case of an even number, it is preferable to use one having a reflecting 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 of the first embodiment. Further, in the case of an odd number, a reflection surface 543 is provided on one side of the space portion 540 of the optical control unit 54 of the first embodiment, for example, on the right side or the left side, and both sides of the space portion 540 of the optical control unit 54 of the second embodiment. It is preferable to use one provided with a reflecting surface 543 and the other provided with a reflecting surface 543.

Further, in the above-described first and second embodiments, the modified example is used for a high mount stop lamp having a light distribution function and a decoration (decoration) function. However, in the present invention, it may be used for a lamp other than the high mount stop lamp having a light distribution function and a decoration (decoration) function. In addition, it is preferable to use it for a lamp in which the light source light L1 from the light source 4 is distributed and used.

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

The present invention is not limited to the above-described first and second embodiments and modifications.

1 Vehicle lighting 1L, 1R Rear combination lamp 2 Lamp housing 3 Lamp lens 4 Light source 40 Board 41 Light emitting part 5 Light guide member 51 First functional part 511, 512, 513, 514 block 52 Second functional part 520 Exit 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 Space part 541 First reincident surface 542 Second reincident surface 543 Reflection surface 544 Refraction surface 545 Extraction surface 55 Emission surface 56 Parallel light reflection surface 57 Bright / dark difference mitigation part 6 Bracket 7 Light room B Rear BD Back door C Vehicle C1, C2 Space D Lower F Front F1, F2, F3 Focus L Left L1 Source light L2 Incident parallel light L3 Incident Refracted light L4 Incident direct light L5 Emitted light L6 Reflected parallel light L7 Reflected light L8 Refracted light L9 Emitted light L10 Reflected light L11 First re-incident light L12 Second re-incident light L13 Emitted light O Center line P panel R Right U Top Z optical axis

Claims (5)

The first functional part and the second functional part are integrated,
The first functional part is
The incident surface on which the light from the light source is incident and
An optical control unit that optically controls incident light,
An exit surface that emits optically controlled light,
With
The second functional part is
The light emitting surface for emitting the optical control light is provided.
A part of the incident surface is a parallel light incident surface that causes a light source light radiated from the center or substantially the center of the light emitting surface of the light source to be incident as incident parallel light parallel to or substantially parallel to the optical axis of the light source.
The optical control unit
It is composed of a wall surface of a space provided between the entrance surface and the exit surface.
A first optical control unit that optically controls a part of the incident parallel light toward the emission surface of the first functional portion,
A second optical control unit that optically controls at least a part of the remaining incident parallel light toward the second functional portion.
Have,
An optical member for a vehicle characterized by this. Before Stories second optical control unit, an optical focus is positioned between the second optical control unit and the second functional part consists of the reflecting surface of the parabolic type for reflecting the incident parallel light to the focal The control surface,
The vehicle optical member according to claim 1. The first functional portion is composed of a plurality of blocks.
Each of the plurality of blocks includes the incident surface, the optical control unit, and the exit surface.
Of the plurality of blocks, the focus of the second optical control unit of the block that is far from the second functional portion with respect to the block that is close to the second functional portion is close to the second functional portion. Located between the optical control unit of the block and the exit surface,
The vehicle optical member according to claim 2. The incident surface that is another part of the incident surface and faces the second functional portion is a linear light incident surface that causes the light source light to be incident as linear light or substantially linear light.
The vehicle optical member according to any one of claims 1 to 3. The lamp housing and lamp lens that partition the lamp room,
A light source arranged on the lamp housing side in the lamp chamber and
The vehicle optical member according to any one of claims 1 to 4, which is arranged on the lamp lens side in the lamp chamber.
With
The exit surface of the first functional portion and the exit surface of the second functional portion face the lamp lens.
The incident surface of the first functional portion faces the light source.
Vehicle lighting fixtures that feature this.

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