JP7100530B2 - Vehicle lighting - Google Patents

Description

The present invention relates to a technical field of a vehicle lamp having a light guide body that guides light incident from an incident surface.

In a vehicle lamp, a light source and a light guide are arranged inside a lamp outer housing composed of a cover and a lamp housing, and the light emitted from the light source is guided by the light guide to the outside from the emission surface of the light guide. There is a type that is irradiated toward.

The light guide body is generally formed in a shape extending in a predetermined direction. A light source is placed at a position facing the incident surface of the light guide, the light emitted from the light source is incident from the incident surface, and the incident light is internally reflected (totally reflected) by the reflection step to form the light guide. At least a part of the light guided in the extending direction and reflected on the inner surface is emitted from the emitting surface.

Such a light guide body is formed in various shapes according to the shape of the vehicle or the lamp for the vehicle (see, for example, Patent Document 1 and Patent Document 2).

Japanese Unexamined Patent Publication No. 2018-45895 Japanese Unexamined Patent Publication No. 2017-4636

By the way, in the case of a vehicle lamp having a light guide as described above, for example, the position of the light guide with respect to the outer casing of the light is limited to a limited position from the viewpoint of ensuring design restrictions and miniaturization. May be done. In such a case, the emission range (light emission range) of the light from the light guide is also limited, which may hinder the improvement of visibility and the improvement of the design regarding the emission of light.

On the other hand, if the shape of the light guide body is changed or a means for blocking a part of the light emitted from the light guide body is added in order to improve the visibility and the design, the vehicle is correspondingly. The manufacturing cost of lighting equipment will rise.

Therefore, it is an object of the present invention to overcome the above-mentioned problems and to improve the visibility and the design without increasing the manufacturing cost.

First, the vehicle lighting fixture according to the present invention is composed of a lamp housing having an opening and a cover attached to the lamp housing with the opening closed, and an internal space is formed as an arrangement space. And a light guide body that is arranged in the arrangement space and guides the light incident from the incident surface in a predetermined direction, and the outer casing of the lamp has a shape in which the vertical width becomes smaller toward the inside of the vehicle in the left-right direction. The light guide body is formed and has a base portion on which the incident surface is formed, a first bifurcated branch portion and a second bifurcated portion, and the first bifurcated portion is the second bifurcated portion. The first branch portion is located on the outer peripheral side of the lamp outer casing and is arranged along the outer peripheral portion of the lamp outer casing, and the first branch portion has a plurality of reflection steps arranged in the light guide direction. The inner surface reflecting portion and the first emitting surface that emits the light reflected internally by the first inner reflecting portion are formed, and the second branching portion has a plurality of reflecting steps arranged in the light guide direction. A second inner surface reflecting portion and a second emitting surface for emitting light internally reflected by the second inner reflecting portion are formed, and the second inner reflecting portion is formed in the vertical direction of the second branch portion. The first inner surface reflecting portion is located on the incident surface side, and is displaced toward the outer peripheral side of the lamp outer casing as it goes to the inside of the vehicle in the left-right direction, and the displacement light emitting portion. It is located on the opposite side of the incident surface and has a central light emitting portion formed in the central portion in the vertical direction of the first branch portion.

As a result, light is emitted from the displacement light emitting portion and the central light emitting portion of the first branch portion arranged along the outer peripheral portion of the vehicle in different ranges in the directions orthogonal to the light guide direction.

Secondly, in the vehicle lamp according to the present invention described above, it is desirable that the width of the first inner surface reflecting portion in the vertical direction is widened as it is separated from the incident surface in the light guide direction.

As a result, the width of the first inner surface reflecting portion increases and the width of the portion where light is reflected increases toward the tip side in the light guiding direction in which the amount of light guide decreases.

Thirdly, in the vehicle lamp according to the present invention described above, the first branch portion is non-formed so that the portion including the end portion on the incident surface side in the light guide direction does not have the first inner surface reflection portion. It is desirable to be provided as a part.

As a result, there is a portion where light is emitted and a portion where light is not emitted in the first branch portion.

According to the present invention, light is emitted in different ranges from the displacement light emitting portion and the central light emitting portion of the first branch portion arranged along the outer peripheral portion of the vehicle in the direction orthogonal to the light guide direction. The light is emitted in a different range according to the emission position of the first branch portion without changing the shape of the optical body or adding a means for blocking a part of the light emitted from the light guide body, and the manufacturing cost. It is possible to improve the visibility and the design without causing the soaring price.

2 to 9 show an embodiment of the vehicle lamp of the present invention, and this figure is an exploded perspective view of the vehicle lamp. It is a rear view which shows the internal structure of the lamp for a vehicle. It is sectional drawing which shows the state which the light guide body is arranged in the reflector. It is a perspective view of a light guide body. It is a perspective view of the light guide body which shows the state seen from the direction different from FIG. Along with FIGS. 7 and 8, the emission range of the light reflected by the first internal reflection portion is shown, and this figure is a conceptual diagram showing the emission range of the light reflected by the central light emitting portion. It is a conceptual diagram which shows the emission range of the light reflected by the displacement light emitting part. It is a conceptual diagram which shows the emission range of the light reflected at another position of the displacement light emitting part. It is a conceptual diagram which shows the emission state of the light emitted from the 1st branch part.

Hereinafter, embodiments for implementing the vehicle lamp of the present invention will be described with reference to the accompanying drawings.

In the embodiment shown below, the vehicle lamp of the present invention is applied to a tail lamp. The scope of application of the present invention is not limited to tail lamps, such as head lamps, clearance lamps, turn signal lamps, stop lamps, daytime running lamps, cornering lamps, hazard lamps, position lamps, back lamps, fog lamps, etc. It can be widely applied to various vehicle lamps such as combination lamps which are a combination of the above.

The vehicle lamps 1 are attached and arranged at both left and right ends of the rear end of the vehicle body, respectively.

The vehicle lamp 1 includes a lamp housing 2 having an opening at the rear end and a cover 3 attached to the lamp housing 2 with the opening of the lamp housing 2 closed (see FIG. 1). The lamp housing 2 and the cover 3 form a lamp outer housing 4, and the internal space of the lamp outer housing 4 is formed as an arrangement space 5.

The lamp housing 2 has an arrangement base 6 and a side surface portion 7 (see FIGS. 1 and 2). The arrangement base 6 is formed in a shape in which the vertical width becomes smaller toward the inside X1 of the vehicle in the left-right direction. The side surface portion 7 projects rearward from the end portion of the outer side X2 of the vehicle in the arrangement base 6 in the left-right direction. The side surface portion 7 is formed in a plate shape that faces substantially the left-right direction.

A mounting hole 8 is formed in the substantially central portion of the arrangement base 6 so as to be penetrated in the front-rear direction. A light emitting unit (not shown) is attached to the arrangement base 6 with at least a part inserted through the mounting hole 8, and the light emitting unit is provided with a lamp bulb.

A reflector 9 is attached to the rear surface of the arrangement base 6. The outer shape of the reflector 9 is substantially the same as the outer shape of the placement base 6, and the size of the reflector 9 is one size smaller than the size of the placement base 6. The reflector 9 is provided with a portion excluding the upper and lower ends as a center function portion 10, an upper end portion as an upper function portion 11, and a lower end portion as a lower function portion 12.

An arrangement hole 10a is formed in the center function portion 10 so as to be penetrated in the front-rear direction, and a lamp bulb of a light emitting unit is arranged in the arrangement hole 10a. The rear surface of the center function portion 10 is formed as a reflecting surface 10b, and the light emitted from the lamp bulb is reflected rearward by the reflecting surface 10b.

The upper functional portion 11 is provided with a concave end-side arranging portion 13 opened rearward, a first arranging portion 14, and a second arranging portion 15, respectively (see FIGS. 1 and 3). The end side arrangement portion 13 is located at the end portion of the inner side X1 in the left-right direction, and has a light transmission hole 13a. The first arrangement portion 14 and the second arrangement portion 15 are vertically separated from each other, and the first arrangement portion 14 and the second arrangement portion 15 are continuous at one end, respectively. The end-side arrangement portion 13, the first arrangement portion 14, and the second arrangement portion 15 are formed in a concave shape that is opened rearward. Each surface forming the recesses of the first arrangement portion 14 and the second arrangement portion 15 is formed as a reflection surface 14a and a reflection surface 15a, respectively.

A reflection band 12a is formed on the rear surface of the lower functional portion 12. The reflection band 12a is formed, for example, by arranging a plurality of steps side by side.

The first inner lens 16 is attached to the upper function unit 11 from the rear, and the second inner lens 17 is attached to the lower function unit 12 from the rear. The first inner lens 16 and the second inner lens 17 are each formed with a diffusion step formed by, for example, embossing or the like.

An extension 18 is attached to the arrangement base 6 of the lamp housing 2 from the rear. The extension 18 has an outer shape and size substantially the same as the outer shape and size of the arrangement base 6, and has a frame-shaped outer peripheral portion 19 and bridge portions 20 and 21 connecting the outer peripheral portions 19 to each other. Watanabe 20 and 21 are formed in a substantially straight line extending in the left-right direction and are positioned vertically separated from each other.

The extension 18 has an upper opening 18a surrounded by a part of the outer peripheral portion 19 and a bridging portion 20, a middle opening 18b surrounded by a part of the outer peripheral portion 19 and the bridging portions 20, 21 and an outer peripheral portion 19. A part and a lower opening 18c surrounded by the bridge portion 21 are formed in order from the upper side. With the extension 18 attached to the placement base 6, the rear end of the first inner lens 16 is inserted and positioned in the upper opening 18a, and the rear end of the second inner lens 17 is inserted in the lower opening 18c. It is inserted and positioned, and the center function portion 10 of the reflector 9 is located behind the inner opening 18b.

A light guide 22 is arranged in the upper function portion 11 of the reflector 9. The light guide body 22 is composed of a base portion 23, a mounted portion 24, a first branch portion 25, and a second branch portion 26 (see FIGS. 4 and 5). The light guide body 22 has a substantially circular cross-sectional shape orthogonal to the light guide direction except for the attached portion 24.

One end surface of the base portion 23 is formed as an incident surface 23a. The attached portion 24 is projected from a portion near one end of the base portion 23. The first branch portion 25 and the second branch portion 26 are bifurcated.

The first branch portion 25 is inclined so as to be displaced upward as it is separated from the base portion 23. A first internal reflection portion 27 is formed on the front surface side of the first branch portion 25, and the first internal reflection portion 27 has a plurality of reflection steps 27a, 27a, ... Is formed by. The first internal reflection portion 27 is formed in a substantially half portion of the first branch portion 25 opposite to the base portion 23. Therefore, in the first inner surface reflecting portion 27, a substantially half portion on the base portion 23 side is provided as a non-forming portion 28 in which the first inner surface reflecting portion 27 does not exist, and a substantially half portion on the opposite side to the base portion 23 is the first. It is provided as a forming portion 29 in which the inner surface reflecting portion 27 of 1 is present.

The range of the non-forming portion 28 in the first branch portion 25 is not limited to the substantially half portion of the first branch portion 25, and includes the end portion of the first branch portion 25 on the base portion 23 side. It may be a part.

The width of the first inner surface reflecting portion 27 in the vertical direction is reduced as the width approaches the incident surface 23a. The first internal reflection unit 27 is composed of a displacement light emitting unit 31 and a central light emitting unit 32. The displacement light emitting unit 31 is located on the incident surface 23a side and is formed so as to be displaced toward the outer peripheral side (upper side) of the lamp outer casing 4 toward the inner side X1 in the left-right direction. The central light emitting portion 32 is located on the tip end side of the first branch portion 25 and is formed in the central portion in the vertical direction of the first branch portion 25. At least a part of the rear surface of the first branch portion 25 is formed as the first emission surface 25a.

The second branch portion 26 is continuous with the other end of the base portion 23 and is formed in a shape extending substantially in the left-right direction. A second inner surface reflecting portion 30 is formed on the front surface side of the second branch portion 26, and the second inner surface reflecting portion 30 is formed by a plurality of reflection steps 30a, 30a, ... There is. The second inner surface reflecting portion 30 is formed at a central portion in the vertical direction of the second branch portion 26 in substantially the entire second branch portion 26. The width of the second inner surface reflecting portion 30 in the vertical direction of the end portion on the base portion 23 side is reduced as the width approaches the incident surface 23a. At least a part of the rear surface of the second branch portion 26 is formed as the second exit surface 26a.

As with the first internal reflection unit 27, the second internal reflection unit 30 may be provided as a displacement light emitting unit in which a part thereof is displaced upward or downward as it goes to the left or right.

In the light guide body 22, the base portion 23 is arranged in the end side arrangement portion 13, the first branch portion 25 is arranged in the first arrangement portion 14, and the second branch portion 26 is arranged in the second arrangement portion 15. Arranged (see FIGS. 2 and 3). The first branch portion 25 is located on the outer peripheral side of the lamp outer casing 4 from the second branch portion 26, and is arranged along the outer peripheral portion of the lamp outer casing 4.

In the light guide body 22, the attached portion 24 is attached to a part of the reflector 9, and the incident surface 23a of the base portion 23 is positioned corresponding to the insertion hole 13a of the reflector 9. A light source 33 is arranged at a position facing the incident surface 23a, and as the light source 33, for example, a light emitting diode (LED) is used.

The base portion 23, the first branch portion 25, and the second branch portion 26 are inserted into the concave end side arrangement portion 13, the first arrangement portion 14, and the second arrangement portion 15, respectively, from the rear. It is arranged in a vertical state and is covered with the first inner lens 16 from the rear side.

In the vehicle lamp 1 configured as described above, when light is emitted from the light source 33, the emitted light is incident on the light guide 22 from the incident surface 23a, and the incident light is first from the base portion 23. It is guided toward the branch portion 25 and the second branch portion 26 of the above.

The light guided to the first branch portion 25 is internally reflected by the reflection steps 27a, 27a, ... Of the first inner surface reflecting portion 27, is emitted from the first emitting surface 25a, and is emitted from the first inner lens 16. And the cover 3 are sequentially transmitted and irradiated to the outside. The light guided to the second branch portion 26 is internally reflected by the reflection steps 30a, 30a, ... Of the second inner surface reflecting portion 30, emitted from the second emitting surface 26a, and is emitted from the first inner lens 16. And the cover 3 are sequentially transmitted and irradiated to the outside. At this time, a part of the light emitted from the first emission surface 25a and the light emitted from the second emission surface 26a may be shielded by the outer peripheral portion 19 of the extension 18 or the bridging portion 20.

A part of the light emitted from the first emission surface 25a is reflected by the reflection surface 14a of the first arrangement portion 14 of the reflector 9, heads toward the first inner lens 16, and is emitted from the second emission surface 26a. A part of the light is reflected by the reflecting surface 15a of the second arrangement portion 15 of the reflector 9 and directed to the first inner lens 16.

The light emitted from the first branch portion 25 and the second branch portion 26 is diffused by the diffusion step of the first inner lens 16, is transmitted through the cover 3 as diffused light, and is irradiated to the outside.

As described above, a reflection band 12a that functions as a diffusion step is formed on the rear surface of the lower function portion 12 of the reflector 9, and the external light incident on the lower function portion 12 is reflected by the reflection band 12a. At the same time, it is diffused by the diffusion step of the second inner lens 17, and when the lower function unit 12 is visually recognized from the outside, the lower function unit 12 is visually recognized in a glittering state.

Further, when the light is emitted from the light source 33, for example, the light is also emitted from the lamp bulb at the same time. The light emitted from the lamp bulb is reflected rearward by the reflecting surface 10b, is transmitted through the cover 3, and is irradiated outward.

As described above, when light is emitted from the first inner surface reflecting portion 27 of the first branch portion 25, the displacement light emitting portion 31 and the central light emitting portion 32 are formed on the first inner surface reflecting portion 27. The emission range (light emission range) of the light from the emission surface 25a in the vertical direction is changed according to the emission position (see FIGS. 6 to 8).

For example, the emission range A in the vertical direction of the light reflected by the central light emitting unit 32 and emitted from the emission surface 25a is the whole in the vertical direction of the first branch portion 25 (see FIG. 6).

Further, for example, the emission ranges B and C in the vertical direction of the light reflected by the displacement light emitting unit 31 and emitted from the emission surface 25a are the emission ranges A of the light reflected by the central light emitting unit 32 and emitted from the emission surface 25a. It becomes smaller (see FIGS. 7 and 8). At this time, as the formation position of the central light emitting portion 32 in the first branch portion 25 in the vertical direction is displaced in the vertical direction, the emission range of the light emitted from the emission surface 25a becomes smaller. For example, the emission range C is made smaller than the emission range B.

When light is emitted from the emission surface 25a in this way, the emission range in the vertical direction changes according to the position where the light is emitted. Therefore, the emission state of the light emitted from the emission surface 25a is, for example, the incident surface 23a side. The emission state is such that the end of the light is tapered (the emission range is shown by diagonal lines in FIG. 9).

As described above, in the vehicle lighting tool 1, the first branch portion 25 is arranged along the outer peripheral portion of the lighting tool outer casing 4, and the second inner surface reflecting portion 30 is above and below the second branch portion 26. A displacement light emitting unit 31 and a displacement light emitting unit 31 are formed in the central portion in the direction, and the first inner surface reflecting portion 27 is located on the incident surface 23a side and is displaced toward the outer peripheral side of the lamp outer casing 4 as it goes to the inner X1 in the left-right direction. It has a central light emitting portion 32 formed in the central portion in the vertical direction of the first branch portion 25, which is located on the opposite side of the incident surface 23a so as to sandwich the first branch portion 25.

Therefore, the light is emitted in different ranges from the displacement light emitting portion 31 and the central light emitting portion 32 of the first branch portion 25 arranged along the outer peripheral portion of the vehicle in the direction orthogonal to the light guide direction. The light is emitted in a different range according to the emission position of the first branch portion 25 without changing the shape of the body or adding a means for blocking a part of the light emitted from the light guide body. It is possible to improve visibility and design without causing a rise in cost.

Further, the width of the first inner surface reflecting portion 27 is widened as it is separated from the incident surface 23a in the light guide direction.

Therefore, the width of the first inner surface reflecting portion 27 increases and the width of the portion where the light is reflected increases as the light guide amount decreases toward the tip side in the light guide direction, so that the light on the first emission surface 25a becomes larger. The amount of light emitted is made uniform at each position in the light guide direction, and the occurrence of light unevenness of the light emitted from the first branch portion 25 can be suppressed.

Further, the first branch portion 25 is provided with a portion including an end portion on the incident surface 23a side in the light guide direction as a non-forming portion 28 in which the first inner surface reflecting portion 27 does not exist.

Therefore, since there is a portion where light is emitted and a portion where light is not emitted in the first branch portion 25, it is possible to improve the degree of freedom in design regarding the emission of light.

1 ... Vehicle lighting, 2 ... Lamp housing, 3 ... Cover, 4 ... Lighting outer housing, 5 ... Arrangement space, 22 ... Light guide, 23 ... Base, 23a ... Incident surface, 25 ... First branch, 26 ... 2nd branch, 27 ... 1st internal reflection, 27a ... reflection step, 28 ... non-forming part, 30 ... second internal reflection, 30a ... reflection step, 31 ... displacement light emitting part, 32 ... Central light emitting part

Claims (3)

A lamp housing having an opening and a lamp outer housing having an internal space formed as an arrangement space, which is composed of a lamp housing having an opening and a cover attached to the lamp housing with the opening closed.
It is provided with a light guide body arranged in the arrangement space and guiding the light incident from the incident surface in a predetermined direction.
The outer case of the lamp is formed in a shape in which the vertical width becomes smaller toward the inside of the vehicle in the left-right direction.
The light guide body has a base portion on which the incident surface is formed, a first bifurcated portion, and a second bifurcated portion.
The first branch portion is located on the outer peripheral side of the lamp outer casing from the second branch portion and is arranged along the outer peripheral portion of the lamp outer casing.
The first branch portion is formed with a first inner surface reflection portion having a plurality of reflection steps arranged in the light guide direction and a first emission surface that emits light internally reflected by the first inner surface reflection portion. Being done
The second branch portion is formed with a second inner reflection portion having a plurality of reflection steps arranged in the light guide direction and a second emission surface that emits light internally reflected by the second inner reflection portion. Being done
The second inner surface reflecting portion is formed at the central portion in the vertical direction of the second branch portion.
The first inner surface reflecting portion is located on the incident surface side and is displaced toward the outer peripheral side of the lamp outer casing as it goes to the inside of the vehicle in the left-right direction. A vehicle lamp having a central light emitting portion formed on the opposite side and formed in the central portion in the vertical direction of the first branch portion. The vehicle lamp according to claim 1, wherein the width of the first inner surface reflecting portion in the vertical direction is widened as the width in the light guide direction is increased away from the incident surface. The vehicle according to claim 1 or 2, wherein the first branch portion includes a portion including an end portion on the incident surface side in the light guide direction as a non-forming portion in which the first inner surface reflection portion does not exist. Lighting equipment.

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