JP2022150767A - Vehicular light guide body and vehicular lighting fixture - Google Patents

Abstract

To provide a vehicular light guide body and a vehicular lighting fixture capable of improving appearance.SOLUTION: A vehicular light guide body includes: a body part arranged in a state of extending in the left-to-right direction in a vehicle mounted state; an incident surface which is arranged at an end part inside the vehicle in the left-to-right direction of the body part, which is directed to the inside of the vehicle, and in which light from a light source enters; an internal reflection surface arranged on the back surface side of the body part, and for internally reflecting the light which has entered from the incident surface; a prism surface arranged on the back surface side of the body part, and for reflecting the light so that the light which has entered from the incident surface is emitted from the front side of the body part; a first emission surface arranged on the front side of the body part, for internally reflecting the light reflected on the internal reflection surface, and for transmitting the light reflected on the prism surface and emitting it; and a second emission surface arranged on the front side of the body part, and for emitting part of the light reflected on the internal reflection surface toward the outside of the vehicle.SELECTED DRAWING: Figure 1

Description

The present invention relates to a vehicle light guide and a vehicle lamp.

BACKGROUND ART A vehicle light guide that guides light from a light source and emits it in the front direction and the side direction is known as a vehicle lamp that is arranged in the rear part of a vehicle (see, for example, Patent Document 1).

JP 2018-185987 A

In the light guide for a vehicle as described above, the prism surface internally reflects to the front side in order to emit the light from the light source in the front direction, and the prism surface internally reflects to the side surface in order to emit the light from the light source in the side direction. In some cases, both prismatic surfaces are formed on the back surface. In this configuration, for example, when viewed from the front, the light reflected to the side may appear to be lacking.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a vehicular light guide and a vehicular lamp capable of improving appearance.

A light guide for a vehicle according to the present invention includes a main body portion arranged in a state of being extended in the left-right direction when mounted on a vehicle, and an end portion of the main body portion inside the vehicle in the left-right direction. an incident surface on which light from a light source is directed, an internal reflection surface arranged on the back side of the main body portion and internally reflecting the light incident from the incident surface, and an internal reflection surface arranged on the back side of the main body portion; a prism surface that reflects the light incident from the incident surface so that the light is emitted from the front side of the main body; a first emission surface that internally reflects the light reflected by the prism surface and emits the light; and a second emission surface that emits light toward.

In the vehicle light guide described above, the first emission surface and the second emission surface may be alternately arranged in the left-right direction.

Further, in the vehicle light guide described above, the main body portion may be curved toward the rear side from the vehicle inner side to the vehicle outer side.

A vehicular lamp according to the present invention includes a light source that emits light to the outside of a vehicle in a vehicle-mounted state, and the above-described light source that is arranged outside the vehicle with respect to the light source and arranged so that the incident surface faces the light source. and a vehicle light guide.

The vehicle lamp further includes a first inner lens that transmits the light emitted from the first emission surface, and a second inner lens that transmits the light emitted from the second emission surface. You may prepare.

ADVANTAGE OF THE INVENTION According to this invention, the light guide for vehicles and the vehicle lamp which can improve an appearance can be provided.

FIG. 1 is a diagram showing an example of a vehicle lamp according to this embodiment. FIG. 2 is a diagram showing the configuration along the AA cross section in FIG. FIG. 3 is a perspective view showing an example of a light guide according to this embodiment. FIG. 4 is an enlarged view showing a main part in FIG. 2. FIG. FIG. 5 is a diagram showing the configuration of part of the light guide according to this embodiment. FIG. 6 is a diagram showing an example of a pattern of light emitted from a light guide.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of a vehicle light guide and a vehicle lamp according to the present invention will be described with reference to the drawings. In addition, this invention is not limited by this embodiment. In addition, components in the following embodiments include components that can be easily replaced by those skilled in the art, or components that are substantially the same.

In the following description, it is assumed that the vehicle 1 is placed on the ground parallel to the horizontal plane, and the terms front, rear, top, bottom, left, and right are used with reference to the driver in the cab. will be described. The front-rear, up-down, and left-right directions are the directions in which the vehicle lamp is mounted in the vehicle, and indicate the directions when the traveling direction of the vehicle is viewed from the driver's seat. In this embodiment, the up-down direction is parallel to the vertical direction, and the front-rear direction and left-right direction are parallel to the horizontal direction.

FIG. 1 is a diagram showing an example of a vehicle lamp 100 according to this embodiment. FIG. 2 is a diagram showing the configuration along the AA cross section in FIG. In this embodiment, the vehicle lamps 100 are provided, for example, on the left and right sides of the rear portion of the vehicle. Therefore, the front side of the vehicle lamp 100 is defined as the rear side in the front-rear direction, and the rear side of the vehicle lamp 100 is defined as the front side in the front-rear direction. In this embodiment, for example, the vehicle lamp 100 mounted on the left side of the rear portion of the vehicle will be described as an example.

The vehicle lamp 100 has two functions: a tail lamp that is provided at the rear of the vehicle and is lit in conjunction with the lighting of the headlamps, and a rear side marker lamp that is provided at the rear of the vehicle and improves visibility from the side of the vehicle. A description will be given with an example of a configuration having the above.

A vehicle lamp 100 includes light sources 10 and 15 , a light guide (vehicle light guide) 20 , a housing 30 , and an inner lens 40 . The vehicle lamp 100 is accommodated, for example, in the lamp chamber LP. Other types of vehicle lamps may be arranged in the lamp chamber LP.

The light sources 10 and 15 are, for example, semiconductor light sources such as LEDs. The light sources 10 and 15 emit light toward the outside of the vehicle in the left-right direction and supply the light to the light guide 20 .

The light guide 20 guides light from the light sources 10 and 15 . FIG. 3 is a perspective view showing an example of a light guide according to this embodiment. As shown in FIGS. 2 and 3, the light guide 20 is formed in a substantially C shape along the upper, left and lower sides of the lamp chamber LP. The light guide 20 has an upper side portion (main body portion) 20A, an outer side portion 20B, and a lower side portion 20C. The upper side portion 20A is a portion that extends in the left-right direction along the upper side of the lamp chamber LP. The upper side portion 20</b>A is arranged so that the end surface on the inside of the vehicle faces the light emitting surface 11 of the light source 10 . The end surface serves as an incident surface 21 into which light from the light source 10 is incident.

The outer side portion 20B is a portion that is connected to the upper side portion and extends vertically along the vehicle outer side (left side) of the lamp chamber LP. The lower side portion 20C is a portion that is connected to the outer side portion 20B and extends in the left-right direction along the lower side of the lamp chamber LP. The lower side portion 20</b>C is formed such that the vehicle inner side end face faces the vehicle inner side. The end surface serves as an incident surface 26 into which light from the light source 15 is incident.

The upper side portion 20A curves rearward (forward) from the vehicle inner side to the vehicle outer side. The upper side portion 20</b>A has an entrance surface 21 , an internal reflection surface 22 , a prism surface 23 , a first exit surface 24 and a second exit surface 25 .

The incident surface 21 is arranged at the vehicle inner side end portion in the left-right direction of the upper side portion 20A. Light from the light source 10 is incident on the incident surface 21 .

The inner reflecting surface 22 is arranged on the back side (front side) of the upper side portion 20A. The internal reflecting surface 22 internally reflects the light incident from the incident surface 21 . The prism surface 23 is arranged on the back side of the upper side portion 20A. The prism surface 23 reflects light so that the light incident from the incident surface 21 is emitted from the front side (rear side) of the upper side portion 20A. The inner reflecting surfaces 22 and the prism surfaces 23 are alternately arranged in the horizontal direction.

The first emission surface 24 is arranged on the front side of the upper side portion 20A. The first emission surface 24 internally reflects the light reflected by the internal reflection surface 22 . Also, the first emission surface 24 transmits and emits the light reflected by the prism surface 23 . The second emission surface 25 is arranged on the front side of the upper side portion 20A. The second emission surface 25 emits part of the light reflected by the internal reflection surface 22 toward the outside of the vehicle. The first emission surfaces 24 and the second emission surfaces 25 are alternately arranged in the horizontal direction.

FIG. 4 is an enlarged view of the main part in FIG. 2, and schematically shows an example of the part near the light source 10 in the upper side part 20A. As shown in FIG. 4, the first emission surfaces 24 are arranged in a state of being shifted in the front-rear direction. In other words, the first emission surface 24 is arranged in a state shifted toward the back side from the inside of the vehicle to the outside of the vehicle. The second emission surface 25 is formed so as to connect between the first emission surfaces 24 that are displaced in the front-rear direction. The second emission surface 25 is formed so as to face the outside of the vehicle (left side in FIG. 4) in the left-right direction. Thus, the first emission surface 24 and the second emission surface 25 are formed stepwise from the vehicle inner side to the vehicle outer side. 5 is a diagram showing a main part in FIG. 3. As shown in FIG. As shown in FIGS. 3 and 5, the upper side portion 20A is formed such that the dimension of the second emission surface 25 in the front-rear direction gradually increases with increasing distance from the light source 10 side.

As shown in FIG. 2, the inner lens 40 includes a first inner lens 41 arranged on the front side (rear) of the light guide 20 and a first inner lens 41 arranged on the vehicle outer side (left) of the light guide 20. and a second inner lens 42 . The first inner lens 41 and the second inner lens 42 are each plate-shaped. The first inner lens 41 and the second inner lens 42 have entrance surfaces 41a and 42a directed toward the light guide 20 and exit surfaces 41b and 42b opposite to the entrance surfaces 41a and 42a.

Next, the operation of the vehicle lamp 100 configured as described above will be described. By performing a predetermined operation in the vehicle, the light source 10 is turned on, and light is emitted from the light emitting surface 11 of the light source 10 . Light emitted from the light emitting surface 11 enters the upper side portion 20A through the incident surface 21 and is internally reflected by the first emitting surface 24 and the internal reflecting surface 22 . Of this light, the light L1 that has reached the prism surface 23 is internally reflected by the prism surface 23 and emitted from the first emission surface 24 to the front side. Further, the light L2 that has reached the second emission surface 25 out of this light is emitted from the second emission surface 25 to the side surface side (outside of the vehicle). Therefore, part of the light emitted from the light source 10 (light L1) is emitted to the front side by the light guide 20, and part of the light (light L2) is emitted to the side surface side.

FIG. 6 is a diagram showing an example of a pattern of light emitted from the light guide 20. As shown in FIG. FIG. 6 shows the pattern irradiated on the virtual screens behind and on the sides of the vehicle. In FIG. 6, the VV line indicates the vertical line of the screen, and the HH line indicates the left and right horizontal lines of the screen. Also, here, the intersection of the vertical line and the horizontal line is assumed to be the reference position in the horizontal direction.

FIG. 6 shows a pattern P by the light guide 20 according to the present embodiment provided with the second emission surface 25 and a comparative pattern PA by the light guide without the second emission surface 25 provided. The pattern P formed by the light guide 20 is efficiently emitted toward the outside of the vehicle by providing the second emission surface 25 . For this reason, compared with the comparative pattern PA of the light guide, in which the second emission surface 25 is not provided, the light is emitted in a state in which it spreads further toward the outside of the vehicle.

The light L1 emitted from the light guide 20 to the front side passes through the first inner lens 41 of the inner lenses 40 and is emitted to the front side as red light. This light L1 is visually recognized, for example, as the light of a tail lamp. On the other hand, the light L2 emitted from the light guide 20 to the side faces passes through the second inner lens 42 of the inner lenses 40 and is emitted to the side faces (outside of the vehicle). This light L2 is visually recognized, for example, as the light of a rear side marker lamp. Thus, one light source 10 can realize two functions of a tail lamp and a rear side marker lamp.

As described above, the light guide body 20 according to the present embodiment includes the upper side portion 20A that is arranged to extend in the left-right direction when mounted on the vehicle, and the upper side portion 20A that is arranged at the inner end portion of the vehicle in the left-right direction. , an incident surface 21 directed toward the inside of the vehicle and onto which light from the light source 10 is incident; an internal reflecting surface 22 disposed on the back side of the upper side portion 20A and internally reflecting the light incident from the incident surface 21; and the upper side portion 20A. A prism surface 23 arranged on the back side of the incident surface 21 and reflecting the light so that the light is emitted from the front side of the upper side portion 20A, and an inner reflection surface arranged on the front side of the upper side portion 20A. A first emission surface 24 that internally reflects the light reflected by the prism surface 22 and transmits and emits the light reflected by the prism surface 23; and a second emission surface 25 that emits light toward the outside of the vehicle.

According to this configuration, the second emission surface 25 for emitting light in the lateral direction is formed on the front surface of the upper side portion 20A, so a prism surface corresponding to the second emission surface 25 is formed on the back surface of the upper side portion 20A. In comparison with the configuration, the lack of light when viewed from the front direction can be suppressed. This makes it possible to improve the appearance.

In the light guide 20 according to this embodiment, the first exit surface 24 and the second exit surface 25 may be alternately arranged in the horizontal direction. As a result, the light toward the front side and the light toward the outside of the vehicle are emitted substantially uniformly in the left-right direction.

In the light guide 20 according to this embodiment, the upper side portion 20A may be curved toward the rear side from the vehicle inner side to the vehicle outer side. This makes it easier to emit light to the outside of the vehicle.

The vehicular lamp 100 according to the present embodiment includes a light source 10 that emits light to the outside of the vehicle when it is mounted on the vehicle, and is arranged outside the vehicle with respect to the light source 10 such that the incident surface 21 faces the light source 10 . and the light guide 20 described above. Thus, the vehicle lamp 100 capable of improving the appearance is obtained.

The vehicle lamp 100 according to this embodiment includes a first inner lens 41 that transmits light emitted from the first emission surface 24 and a second inner lens 42 that transmits light emitted from the second emission surface 25 . may be further provided. Thereby, the light emitted from the first emission surface 24 and the light emitted from the second emission surface can be used separately.

The technical scope of the present invention is not limited to the above embodiments, and modifications can be made as appropriate without departing from the scope of the present invention. For example, in the above-described embodiment, the configuration in which the second emission surface 25 is provided on the upper side portion 20A of the light guide 20 has been described as an example, but the present invention is not limited to this. For example, a configuration in which a configuration similar to that of the second emission surface 25 is provided on the lower side portion 20C of the light guide 20 may be employed.

L1, L2...light, LP...light chamber, P...pattern, PA...comparative pattern, 1...vehicle, 10, 15...light source, 11...light emitting surface, 20...light guide, 20A...upper side, 20B...outer side Part 20C... Lower side part 21, 26, 41a, 42a... Entrance surface 22... Internal reflection surface 23... Prism surface 24... First emission surface 25... Second emission surface 30... Housing 40... Inner Lens 41... First inner lens 41b, 42b... Output surface 42... Second inner lens 100... Vehicle lamp

Claims (5)

a main body arranged in a state of being extended in the left-right direction in a vehicle-mounted state;
an incident surface disposed at an end portion of the main body portion on the inner side of the vehicle in the left-right direction, directed toward the inner side of the vehicle, and receiving light from a light source;
an internal reflecting surface arranged on the back side of the main body portion and internally reflecting the light incident from the incident surface;
a prism surface arranged on the back side of the main body portion and reflecting the light incident from the incident surface so that the light is emitted from the front side of the main body portion;
a first emission surface disposed on the front side of the main body portion, which internally reflects the light reflected by the internal reflection surface and transmits and emits the light reflected by the prism surface;
A light guide for a vehicle, comprising: a second emission surface disposed on the front side of the main body portion, the second emission surface emitting part of the light reflected by the internal reflection surface toward the outside of the vehicle. The vehicle light guide according to claim 1, wherein the first emission surface and the second emission surface are alternately arranged in the left-right direction. The vehicular light guide according to claim 1 or 2, wherein the main body portion is curved toward the rear side from the vehicle inner side to the vehicle outer side. a light source that emits light to the outside of the vehicle when mounted on the vehicle;
The vehicle light guide according to any one of claims 1 to 3, which is arranged outside the vehicle with respect to the light source, and arranged so that the incident surface faces the light source. lamp. a first inner lens that transmits the light emitted from the first emission surface;
The vehicle lamp according to claim 4, further comprising: a second inner lens that transmits the light emitted from the second emission surface.

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