JP2021185558A - Vehicle lamp and lens body - Google Patents

Abstract

To provide a vehicle lamp capable of evenly emitting light from a wedge-shaped lens part (being visually recognized as if it emits light evenly).SOLUTION: A vehicle lamp 10 comprises a light source 20, and a lens body 30 including a first light guide part 31, a second light guide part 32 and a wedge-shaped lens part 33. The first light guide part 31 includes a light input part 31a, and a first total reflection surface 31b. The second light guide part 32 includes a second total reflection surface 32a and a third total reflection surface 32b. The wedge-shaped lens part 33 includes a light emission surface 33a, and a fourth total reflection surface 33b. The light from the light source 20 collimated by the light input part 31a is totally reflected in order of the first total reflection surface 31b, the second total reflection surface 32a, the third total reflection surface 32b and the fourth total reflection surface 33b (plural structures 33e), and then emitted from the light emission surface 33a.SELECTED DRAWING: Figure 2

Description

The present invention relates to a vehicle lamp and a lens body, and more particularly to a vehicle lamp and a lens body capable of uniformly emitting light from a wedge-shaped lens portion (visually appearing to emit light uniformly).

FIG. 8 is a cross-sectional view of the vehicle lamp 1 described in Patent Document 1.

As shown in FIG. 8, the light input surface 3 arranged in front of the light source 2, the total reflection surface 4 that totally reflects the light from the light source 2 that enters from the light input surface 3, and the total reflection surface 4 are all. For example, Patent Document 1 describes a vehicle lighting tool 1 using a lens body 6 provided with a light emitting unit 5 into which light from a reflected light source 2 enters.

In the vehicle lighting tool 1 described in Patent Document 1, the light Ray from the light source 2 that receives light from the light entering surface 3 and is totally reflected by the total reflection surface 4 enters the light emitting unit 5 and enters the light emitting unit 5. It is totally reflected by the total reflection surface 5a provided and emits light from the light emitting surface 5b provided in the light emitting unit 5. As a result, the light emitting unit 5 emits light.

On the other hand, as shown in FIG. 9, the present inventors collimate the light (collimated light) from the light source 103 that is collimated by the light input unit 101 and totally reflected by the first total reflection surface 102 into the wedge-shaped lens unit 104. The wedge-shaped lens portion 104 is made to emit light by receiving light from the investigated. FIG. 9 is a cross-sectional view of a vehicle lamp using a lens body including a wedge-shaped lens portion 104 examined by the present inventors.

Japanese Unexamined Patent Publication No. 2017-228440

However, as a result of examination by the present inventors, in the wedge-shaped lens portion, light having a weak relative intensity (light in _{a wide angle direction with respect to the optical axis AX 103} of the light source 103 (for example, light Ray 1 shown in FIG. 9)) is emitted. Light having a strong relative intensity while reaching the tip of the wedge-shaped lens portion (light in _{a narrow angle direction with respect to the optical axis AX 103} of the light source 103 (for example, light Rays 2 and 3 shown in FIG. 9)) has a wedge shape. Since it does not reach the tip of the lens (it reaches only the middle of the wedge-shaped lens), the tip becomes relatively dark and the wedge-shaped lens is made to emit light uniformly (it is visually recognized as if it is emitting uniformly). ) Turned out to be difficult.

INDUSTRIAL APPLICABILITY The present invention has been made to solve such a problem, and provides a vehicle lamp capable of uniformly emitting light from a wedge-shaped lens portion (visually as if the wedge-shaped lens portion emits light uniformly). With the goal.

The vehicle lighting equipment according to the present invention has a light source, a first light guide portion arranged in front of the light source, and an end portion of the first light guide portion on the anti-light source side with respect to the light irradiation direction of the light source. A lens including a second light guide portion extending in an oblique direction and a wedge-shaped lens portion extending from the tip end portion of the second light guide portion to the anti-second light guide portion side and in a direction intersecting the optical axis of the light source. The first light guide unit includes a light input unit and a first total reflection surface, and the second light guide unit includes a second total reflection surface and a third total reflection surface. The wedge-shaped lens portion includes a light emitting surface arranged on the anti-light source side and a fourth total reflecting surface arranged on the opposite side thereof, and the light emitting surface is directed toward the tip end portion of the wedge-shaped lens portion. It is a wedge-shaped lens portion in which the thickness between and the fourth total reflecting surface becomes thin, and the light input portion is arranged in front of the light source, and the light input portion enters the lens body from the light source. In the first total reflecting surface, the collimated light from the light input portion incident on the first total reflecting surface is totally reflected toward the second total reflecting surface. The second total reflecting surface is arranged on the optical path of the collimated light from the incoming light portion in such an inclined state, and the second total reflecting surface is from the first total reflecting surface incident on the second total reflecting surface. The reflected light is arranged on the optical path of the reflected light from the first total reflection surface in a state of being inclined so as to be totally reflected toward the third total reflection surface, and the third total reflection surface is The second total is in a state where the reflected light from the second total reflecting surface incident on the third total reflecting surface is inclined so as to travel in the wedge-shaped lens portion toward the tip end portion of the wedge-shaped lens portion. The fourth total reflecting surface is arranged on the optical path of the reflected light from the reflecting surface, and the fourth total reflecting surface includes a plurality of structures arranged on the optical path of the reflected light from the third total reflecting surface, and the plurality of said. The structure is configured such that the reflected light from the third total reflecting surface incident on the plurality of structures is totally reflected toward the light emitting surface and emitted from the light emitting surface.

With such a configuration, it is possible to provide a vehicle lamp capable of uniformly emitting light from the wedge-shaped lens portion (visually as if the wedge-shaped lens portion emits light uniformly).

This is mainly due to the provision of the second light guide section (second total reflection surface and third total reflection surface), so that light with strong relative intensity (light in the narrow angle direction with respect to the optical axis of the light source) can be emitted. This is due to reaching the tip of the wedge-shaped lens portion or its vicinity.

In the vehicle lighting equipment, two sets of a combination of the second light guide portion and the wedge-shaped lens portion are provided, one combination of the second light guide portion and the wedge-shaped lens portion, the second light guide portion, and the said. The other combination with the wedge-shaped lens portion may be arranged rotationally symmetrically with respect to the optical axis of the light source.

Further, in the vehicle lamp, a plurality of combinations of the light source and the lens body are provided, and the combination of the light source and the lens body is arranged in parallel, and each of the lenses arranged in parallel is arranged in parallel. The body may be integrally molded.

Further, in the vehicle lighting equipment, when the width of the second light guide portion in the intersecting direction is W1 and the width of the first light guide portion in the intersecting direction is W2, W1: W2 is 1: It may be 6 or more.

Further, in the vehicle lighting equipment, at least the light from the light source having a strong relative intensity is totally reflected in this order by the first total reflection surface, the second total reflection surface, and the third total reflection surface. , It may reach the tip end portion of the wedge-shaped lens portion or its vicinity, be totally reflected by the fourth total reflection surface, and emit light from the light emission surface.

The lens body according to the present invention extends from the first light guide portion arranged in front of the light source and the end portion of the first light guide portion on the anti-light source side in an oblique direction with respect to the light irradiation direction of the light source. The first light guide includes the two light guides and a wedge-shaped lens portion extending from the tip of the second light guide to the anti-second light guide side and in a direction intersecting the optical axis of the light source. The unit includes a light input unit and a first total reflection surface, the second light guide unit includes a second total reflection surface and a third total reflection surface, and the wedge-shaped lens unit is on the anti-light source side. A light emitting surface to be arranged and a fourth total reflecting surface arranged on the opposite side thereof are included, and between the light emitting surface and the fourth total reflecting surface toward the tip of the wedge-shaped lens portion. It is a wedge-shaped lens portion having a thin thickness, and the light input portion is an incoming light portion that is arranged in front of the light source and collimates the light from the light source that enters the light from the light input portion. The reflective surface is in a state of being inclined so that the collimated light from the light input portion incident on the first total reflective surface is totally reflected toward the second total reflective surface, and the collimated light from the incoming portion. The second total reflecting surface is arranged on the optical path of light, and the reflected light from the first total reflecting surface incident on the second total reflecting surface is totally reflected toward the third total reflecting surface. The third total reflection surface is arranged on the optical path of the light reflected from the first total reflection surface in a state of being inclined so as to be tilted so that the third total reflection surface is the second total reflection incident on the third total reflection surface. The reflected light from the surface is arranged on the optical path of the reflected light from the second total reflecting surface in a state of being inclined so as to travel in the wedge-shaped lens portion toward the tip end portion of the wedge-shaped lens portion. The fourth total reflecting surface includes a plurality of structures arranged on an optical path of light reflected from the third total reflecting surface, and the plurality of structures are incident on the plurality of structures. The light reflected from all the reflecting surfaces is configured to be totally reflected toward the light emitting surface and emitted from the light emitting surface.

INDUSTRIAL APPLICABILITY According to the present invention, it is possible to provide a lighting fixture for a vehicle capable of uniformly emitting light from a wedge-shaped lens portion (visually as if the wedge-shaped lens portion emits light uniformly).

It is a perspective view of a vehicle lamp 10. (A) is a cross-sectional view of a vehicle lamp 10 in a plane parallel to the XY plane, and (b) is an enlarged view in a circle C. (A) A front view of a vehicle lamp 10 (lens body 30), (b) a luminance distribution in a cross section taken along the line AA of FIG. 3 (a). It is a table which shows the maximum luminance / minimum luminance (MAX / MIN) of each of Comparative Examples 1-5. This is a modification of the vehicle lamp 10. It is another modification of the vehicle lamp 10. It is another modification of the vehicle lamp 10. It is sectional drawing of the vehicle lamp 1 described in Patent Document 1. FIG. It is sectional drawing of the lamp for a vehicle which used the lens body including the wedge-shaped lens part which the present inventor examined.

Hereinafter, a vehicle lamp 10 according to an embodiment of the present invention will be described with reference to the accompanying drawings. Corresponding components in each figure are designated by the same reference numerals, and duplicate description is omitted.

FIG. 1 is a perspective view of a vehicle lamp 10. FIG. 2A is a cross-sectional view of the vehicle lamp 10 in a plane parallel to the XY plane.

The vehicle lighting equipment 10 shown in FIGS. 1 and 2 can be applied to vehicle signal lighting equipment such as a tail lamp, a stop lamp, a turn lamp, a DRL lamp, or a position lamp. Although not shown, the vehicle lighting fixture 10 is arranged in a lighting chamber composed of an outer lens and a housing, and is attached to the housing or the like. Hereinafter, for convenience of explanation, the XYZ axes are defined as shown in FIGS. 1 and 2 (a). The X-axis extends in the front-rear direction of the vehicle. The Y-axis extends, for example, in the vehicle width direction. The Z-axis extends, for example, in the vertical direction.

As shown in FIGS. 1 and 2A, the vehicle lamp 10 includes a light source 20 and a lens body 30.

The light source 20 is a semiconductor light emitting element such as an LED. As shown in FIG. 2A, the light source 20 includes a light emitting surface 20a. The light emitting surface 20a is, for example, a rectangular light emitting surface of 1 mm square. Optical axis _{AX 20} of the light source 20 passes through the center of the light emitting surface 20a, and extends in a direction (X axis direction) perpendicular to the light emitting surface 20a.

A lens body 30 is arranged in front of the light source 20.

The lens body 30 is made of a transparent resin such as acrylic or polycarbonate, and as shown in FIG. 2A, the first light source 31 arranged in front of the light source 20 and the anti-light source of the first light source 31. A second light guide portion 32 extending diagonally from the end on the side with respect to the light irradiation direction of the light source 20 (middle and upper direction in FIG. 2A), and an anti-second guide from the tip of the second light guide portion 32. including a direction intersecting the optical axis AX ₂₀ of the optical unit side and the light source 20 (e.g., a direction perpendicular to) the wedge-shaped lens portion 33 extending, the. The lens body 30 is integrally molded by, for example, injection molding.

The first light guide unit 31 includes a light input unit 31a and a first total reflection surface 31b.

The light input unit 31a is arranged in front of the light source 20 and collimates the light from the light source 20 that enters the lens body 30 (first light guide unit 31) from the light input unit 31a (optical axis AX of the light source 20). It is an incoming light unit (which converts light parallel to _20). For example, the light entry unit 31a includes a lens surface 31a1 that is convex toward the light source 20 and whose focal point is located near the light source 20 (for example, the center of the light emitting surface 20a). Not limited to this, the light input unit 31a may have any configuration as long as it can collimate the light from the light source 20.

The first total reflection surface 31b is, for example, a plane reflection surface, and the collimated light from the light input portion 31a incident on the first total reflection surface 31b is provided on the second total reflection surface 32 by the second total reflection surface. in an inclined 45 degrees to the optical axis AX ₂₀ of the light source 20 so as to be totally reflected toward the 32a, is disposed on the optical path of the collimated light from the light input portion 31a.

The second light guide unit 32 includes a second total reflection surface 32a and a third total reflection surface 32b. The first total reflection surface 31b, the second total reflection surface 32a, and the third total reflection surface 32b are, for example, parallel to each other.

The second total reflection surface 32a is, for example, a plane reflection surface, and the reflected light from the first total reflection surface 31b incident on the second total reflection surface 32a is provided on the second light guide unit 32. The reflected light from the first total reflecting surface 31b is tilted 45 degrees with respect to the Y axis (incident direction of the reflected light from the first total reflecting surface 31b) so as to be fully reflected toward the reflecting surface 32b. It is located on the optical path.

In the third total reflecting surface 32b, the reflected light from the second total reflecting surface 32a incident on the third total reflecting surface 32b enters the wedge-shaped lens portion 33 and travels toward the tip portion 33d thereof. It is arranged on the optical path of the reflected light from the second total reflecting surface 32a in a state of being inclined by 45 degrees with respect to the X axis (incident direction of the reflected light from the second total reflecting surface 32a). The third total reflection surface 32b is arranged adjacent to the first total reflection surface 31b provided in the first light guide unit 31, for example, in the same surface as the first total reflection surface 31b.

The wedge-shaped lens portion 33 includes an emission surface 33a arranged on the anti-light source side and a fourth total reflection surface 33b arranged on the opposite side thereof, and is a tip from a base end portion 33c of the wedge-shaped lens portion 33. It is a wedge-shaped lens portion in which the thickness between the emission surface 33a and the fourth total reflection surface 33b becomes thinner toward the portion 33d.

The light emitting surface 33a is, for example, a plane parallel to the YZ plane.

The fourth total reflection surface 33b is, for example, a plane reflection surface, and the thickness between the light emitting surface 33a and the fourth total reflection surface 33b decreases from the base end portion 33c of the wedge-shaped lens portion 33 toward the tip end portion 33d. It is arranged in an inclined state.

Fourth total reflection surface 33b includes a plurality of structures _33e 1 _{~33e n.} As shown in FIG. 2 (a), the plurality of structures _33e 1 _{~33e n,} second total reflecting surface 32a and the third total reflecting surface 32b by the total reflection reflected light in this order Ray2~Ray4 and first The reflected light Ray1 reflected by the total reflection surface 31b is incident.

Next, configuration examples of a plurality of structures _33e 1 _{~33e n.}

FIG. 2B is an enlarged view of the inside of the circle C in FIG. 2A.

For example, the plurality of structures _33e 1 _{~33e n,} as shown in FIG. 2 (b), a plurality of total reflection surfaces which are arranged in a staircase pattern from the base end portion 33c of the wedge-shaped lens portion 33 toward the tip portion 33d Is. Hereinafter referred to as total reflection surface _33e 1 _{~33e n.} Total reflection surface _33e 1 _{~33e n} are each, for example, a flat reflective surface of the elongated in the Z-axis direction. Total reflection surface _33e 1 _{~33e n} is from the third light reflected from the total reflection surface 32 b (e.g., reflected light Ray2～Ray4) and the first total reflection surface 31b to be incident on the total reflection surface _33e 1 _{~33e n} Arranged in a state of being inclined by 45 degrees with respect to, for example, the X axis (the incident direction of the reflected light from the third total reflecting surface 32b) so that the reflected light (for example, the reflected light Ray1) is totally reflected toward the light emitting surface 33a. Has been done.

In the vehicle lighting tool 10 having the above configuration, the light from the light source 20 that enters the lens body 30 from the light input unit 31a is the first total reflection surface 31b provided in the first light guide unit 31 and the second light guide. The second total reflection surface 32a and the third total reflection surface 32b provided in the portion 32, and the fourth total reflection surface 33b provided in the wedge-shaped lens portion 33 are totally reflected in this order, and finally the wedge-shaped lens portion 33 is provided. Light is emitted from the emitted light emitting surface 33a. As a result, the wedge-shaped lens portion 33 emits light.

That is, in the vehicle lamp 10 having the above configuration, when the light source 20 is turned on, as shown in FIG. 2A, the light from the light source 20 enters the lens body 30 from the light input unit 31a. At that time, the light from the light source 20 is collimated _{by the light input unit 31a to the light parallel to the optical axis AX 20 of the light source 20.} The collimated light Rays 1 to 4 are totally reflected in this order by the first total reflection surface 31b, the second total reflection surface 32a, and the third total reflection surface 32b, and enter the wedge-shaped lens portion 33, and the tip portion 33d thereof. proceeds towards, incident on the total reflection surface _33e 1 _{~33e n.}

Total reflection surface _33e 1 _{~33e n} is a collimated light Ray1~4 incident on the total reflection surface _33e 1 _{~33e n} is totally reflected toward the Idemitsumen 33a.

Collimated light Ray1~4 being totally reflected by the total reflection surface _33e 1 _{~33e n} each is exiting from the light exit surface 33a provided on the wedge-shaped lens portion 33. As a result, the wedge-shaped lens portion 33 emits light.

Next, the conditions under which the wedge-shaped lens portion 33 emits light uniformly (it is visually recognized as if it emits light uniformly) will be described with reference to comparative examples.

The present inventors performed simulations on the first to fifth comparative examples in order to obtain the conditions under which the wedge-shaped lens portion 33 emits light uniformly (it is visually recognized as if the wedge-shaped lens portion 33 emits light uniformly). As a result, the folded width W1 (the width of the second light guide unit 32 in the Y-axis direction; see FIG. 3A): the light input portion width W2 (the width of the first light guide unit 31 in the Y-axis direction). It was confirmed that when a) was set to 1: 2 <W1: W2 ≦ 1: 6, almost satisfactory results were obtained. Hereinafter, this point will be described with reference to FIGS. 3 and 4.

The first comparative example is a vehicle lamp 1 having the configuration shown in FIG.

The second comparative example is a vehicle lamp 10 having the configuration shown in FIG. 3A, in which the folding width W1 is 1 mm, the light entering portion width W2 is 6 mm, and W1: W2 is 1: 6.

A third comparative example is a vehicle lamp 10 having the configuration shown in FIG. 3A, in which the folding width W1 is 2 mm, the light entering portion width W2 is 6 mm, and W1: W2 is 1: 3.

The fourth comparative example is a vehicle lamp 10 having the configuration shown in FIG. 3A, in which the folding width W1 is 2.5 mm, the light entering portion width W2 is 6 mm, and W1: W2 is 1: 2.4.

A fifth comparative example is a vehicle lamp 10 having the configuration shown in FIG. 3A, in which the folding width W1 is 3 mm, the light entering portion width W2 is 6 mm, and W1: W2 is 1: 2.

FIG. 3A is a front view of the vehicle lamp 10 (lens body 30), and FIG. 3B is a luminance distribution in the AA cross section of FIG. 3A.

The straight line (solid line) indicated by the reference numeral LA in FIG. 3B is an approximate straight line of graphs L1 to L5. In FIG. 3B, the straight line LA is drawn downward to the right. Further, the dotted line indicated by the reference numeral LB in FIG. 3B is a straight line representing a luminance of + 5% with respect to the straight line LA. Further, the dotted line indicated by the reference numeral LC in FIG. 3B is a straight line representing a luminance of −5% with respect to the straight line LA.

The graph indicated by the reference numeral L1 in FIG. 3B represents the luminance distribution in the cross section corresponding to the AA cross section of the first comparative example. The graph indicated by the reference numeral L2 in FIG. 3B represents the luminance distribution in the AA cross section of the second comparative example. The graph indicated by the reference numeral L3 in FIG. 3B represents the luminance distribution in the AA cross section of the third comparative example. The graph indicated by the reference numeral L4 in FIG. 3B represents the luminance distribution in the AA cross section of the fourth comparative example. The graph indicated by reference numeral L5 in FIG. 3B represents the luminance distribution in the AA cross section of the fifth comparative example.

Referring to FIG. 3B, in Comparative Examples 2 to 5, the luminance of the light emitting surface 33a between the base end portion 33c and the tip end portion 33d of the wedge-shaped lens portion 33 is between the dotted line LB and the dotted line LC. , Almost uniform.

FIG. 4 is a table showing the maximum luminance / minimum luminance (MAX / MIN) of each of Comparative Examples 1 to 5. The smaller the maximum brightness / minimum brightness (MAX / MIN), the more uniformly the light is emitted (it is visually recognized as if the light is uniformly emitted).

Referring to FIG. 4, the maximum luminance / minimum luminance (MAX / MIN) of Comparative Example 1 is 2.03, whereas the maximum luminance / minimum luminance (MAX / MIN) of Comparative Examples 2 to 5 is 1. It is 77 or less. That is, Comparative Examples 2 to 5 emit light more uniformly than Comparative Example 1 (it is visually recognized as if they emit light uniformly).

From the above, by setting the folding width W1: the light input portion width W2 to 1: 2 <W1: W2 ≦ 1: 6, the wedge-shaped lens portion 33 emits light uniformly (as if it emits light uniformly). It can be seen).

As described above, according to the present embodiment, it is possible to provide a vehicle lamp 10 capable of uniformly emitting light from the wedge-shaped lens portion 33 (visually as if the wedge-shaped lens portion 33 is emitting light uniformly).

This is mainly due to the provision of the second light guide unit 32 (the second total reflection surface 32a and the third total reflection surface 32b), so that the light has a strong relative intensity (narrower than _{the optical axis AX 20 of the light source 20).} Light in the angular direction (for example, light Ray2, 3) shown in FIG. 2A) is totally reflected by the second total reflection surface 32a and the third total reflection surface 32b in this order, and the tip portion 33d of the wedge-shaped lens portion 33 or This is due to reaching the vicinity thereof and emitting light from the tip portion 33d of the wedge-shaped lens portion 33 or its vicinity among the light emitting surfaces 33a provided on the wedge-shaped lens portion 33.

Further, according to the present embodiment, for light having a weak relative intensity (light in the _{wide angle direction with respect to the optical axis AX 20} of the light source 20), for example, Ray 1 shown in FIG. 2 (a), the first total reflection surface 31b. (and total reflection surface _33e 1 _{~33e n)} exits out the total reflection by the base end portion 33c of the wedge lens 33 of the light exit surface 33a provided on the wedge-shaped lens portion 33. Moreover, (the light of a wide-angle direction with respect to the optical axis _{AX 20} of the light source 20) relative intensity weak light, for example, for Ray4 shown in FIG. 2 (a), the second total reflection surface 32a and the third total reflecting surface 32b (and total reflection surface _33e 1 _{~33e n)} to the light exit from the proximal end 33c near the wedge lens portion 33 of Idemitsu surface 33a provided in the total reflection wedge lens portion 33 in this order.

As described above, the light having a weak relative intensity (for example, Rays 1 and 4 shown in FIG. 2A) has a lens body as compared with the light having a strong relative intensity (for example, the Rays 2 and 3 shown in FIG. 2A). Since the optical path length in 30 is short, the attenuation of light intensity due to absorption in the lens body 30 (Lambert-Beer's law) is suppressed. Further, for light having a weak relative intensity (for example, Ray 1 shown in FIG. 2A), the number of total reflections is smaller than that of Rays 2 to 4, so that the attenuation of the luminous intensity in the lens body 30 is suppressed.

As described above, the fourth total reflection surface 33b (total reflection surface _33e 1 _{~33e n)} to the second total reflection surface 32a and the third total reflecting surface 32b is totally reflected in this order in the reflected light Ray2~Ray4 and first By incident the reflected light Ray1 reflected by the all reflecting surfaces 31b, the wedge-shaped lens portion 33 can be made to emit light uniformly (visually appear to be emitted uniformly).

Next, a modification will be described.

FIG. 5 is a modified example of the vehicle lamp 10.

In the above embodiment, an example in which a combination of the second light guide unit 32 and the wedge-shaped lens unit 33 is used has been described, but the present invention is not limited to this.

For example, as shown in FIG. 5, two sets of a combination of the second light guide unit 32 and the wedge-shaped lens unit 33 may be used. In this case, one combination of the second light guide unit 32 and the wedge-shaped lens unit 33 and the other combination of the second light guide unit 32 and the wedge-shaped lens unit 33 are rotationally symmetric with respect to _{the optical axis AX 20 of the light source 20.} Is placed in.

FIG. 6 is another modification of the vehicle lamp 10.

In the above embodiment, an example using a combination of the light source 20 and the lens body 30 has been described, but the present invention is not limited to this.

For example, as shown in FIG. 6, a plurality of combinations of the light source 20 and the lens body 30 may be used. In this case, the combination of the light source 20 and the lens body 30 may be arranged in parallel. Then, each of the lens bodies 30 arranged in parallel may be integrally molded.

Further, in the above embodiment, the example in which the LED is used as the light source 20 has been described, but the present invention is not limited to this, and a light source other than the LED may be used.

Further, in the above embodiment, the example in which the first total reflection surface 31b or the like is tilted by 45 degrees has been described, but the present invention is not limited to this, and the first total reflection surface 31b or the like may be tilted at an angle other than 45 degrees.

Further, in the above embodiment, the example in which the first total reflection surface 31b or the like is tilted by 45 degrees has been described, but the present invention is not limited to this, and the first total reflection surface 31b or the like may be tilted at an angle other than 45 degrees.

Further, in the above embodiment, the light having a strong relative intensity in the second light guide unit 32 (light in the _{narrow angle direction with respect to the optical axis AX 20} of the light source 20 (for example, light Rays 2 and 3 shown in FIG. 2A)). ) Has been described as an example of total reflection twice, but the present invention is not limited to this, and total reflection may be performed three or more times.

FIG. 7 is another modification of the vehicle lamp 10.

For example, as shown in FIG. 7, by adding a combination of the first total reflection surface 31b, the second total reflection surface 32a, and the third total reflection surface 32b, light having a strong relative intensity (optical axis AX _{20 of the light source 20) is added.} (Light in the narrow angle direction) may be further (for example, three times or more) totally reflected. In this way, the shape of the lens body 30 can be freely deformed according to the installation space of the vehicle lamp 10.

Further, in the above embodiment, an example in which the vehicle lamp of the present invention is applied to a vehicle signal lamp such as a tail lamp, a stop lamp, a turn lamp, a DRL lamp or a position lamp has been described, but the present invention is not limited to this. For example, the vehicle lighting equipment of the present invention is applied to other vehicle signal lighting equipment such as headlamps (for high beam and low beam), rear fog lamps, accessory lamps, inner lenses for general vehicle lighting equipment, and inner lenses for general lighting. You may.

All the numerical values shown in the above embodiments are examples, and it goes without saying that appropriate numerical values different from these can be used.

The above embodiments are merely exemplary in all respects. The present invention is not limitedly construed by the description of the above embodiment. The present invention can be practiced in various other forms without departing from its spirit or key features.

10 ... Vehicle lighting equipment, 20 ... Light source, 20a ... Light emitting surface, 30 ... Lens body, 31 ... First light guide unit, 31a ... Light input unit, 31a1 ... Lens surface, 31b ... First total reflection surface, 32 ... 2 light guide unit, 32a ... 2nd total reflection surface, 32b ... 3rd total reflection surface, 33 ... wedge-shaped lens unit, 33a ... light emission surface, 33b ... 4th total reflection surface, 33c ... base end portion, 33d ... tip portion , 33e1 ... Total reflection surface (structure), AX ₂₀ ... Optical axis, W1 ... Folded width, W2 ... Light entrance width

Claims (8)

Light source and
The first light guide portion arranged in front of the light source, the second light guide portion extending diagonally from the end portion of the first light source portion on the anti-light source side with respect to the light irradiation direction of the light source, and the above. A lens body including a wedge-shaped lens portion extending from the tip end portion of the second light guide portion to the anti-second light guide portion side and in a direction intersecting the optical axis of the light source.
The first light guide portion includes a light input portion and a first total reflection surface.
The second light guide portion includes a second total reflection surface and a third total reflection surface.
The wedge-shaped lens portion includes a light emitting surface arranged on the anti-light source side and a fourth total reflection surface arranged on the opposite side thereof, and becomes the light emitting surface toward the tip end portion of the wedge-shaped lens portion. It is a wedge-shaped lens portion having a thin thickness between the fourth total reflection surface and the above-mentioned total internal reflection surface.
The light input unit is a light input unit that is arranged in front of the light source and collimates the light from the light source that enters the lens body from the light input unit.
The first total reflection surface is in a state of being inclined so that the collimated light incident on the first total reflection surface is totally reflected toward the second total reflection surface. It is placed on the optical path of the collimated light from the part,
The second total reflection surface is in a state of being inclined so that the reflected light from the first total reflection surface incident on the second total reflection surface is totally reflected toward the third total reflection surface. It is arranged on the optical path of the reflected light from the first total reflecting surface,
The third total reflection surface is inclined so that the reflected light from the second total reflection surface incident on the third total reflection surface travels in the wedge-shaped lens portion toward the tip end portion of the wedge-shaped lens portion. In the state, it is arranged on the optical path of the light reflected from the second total reflection surface.
The fourth total reflection surface includes a plurality of structures arranged on the optical path of the light reflected from the third total reflection surface.
The plurality of structures are configured such that the reflected light from the third total reflecting surface incident on the plurality of structures is totally reflected toward the light emitting surface and emitted from the light emitting surface. Lighting equipment. Two sets of combinations of the second light guide portion and the wedge-shaped lens portion are provided.
One combination of the second light guide portion and the wedge-shaped lens portion and the other combination of the second light guide portion and the wedge-shaped lens portion are arranged rotationally symmetrically with respect to the optical axis of the light source. The vehicle lighting device according to claim 1. A plurality of combinations of the light source and the lens body are provided.
The combination of the light source and the lens body is arranged in parallel.
The vehicle lamp according to claim 1, wherein each of the lens bodies arranged in parallel is integrally molded. When the width of the second light guide unit in the intersecting direction is W1 and the width of the first light guide unit in the intersecting direction is W2, the claim is 1: 2 <W1: W2 ≦ 1: 6. The vehicle lighting fixture according to any one of Items 1 to 3. At least the light from the light source having a high relative intensity is totally reflected by the first total reflection surface, the second total reflection surface, and the third total reflection surface in this order, and the tip of the wedge-shaped lens portion or The vehicle lighting tool according to any one of claims 1 to 4, which reaches the vicinity thereof, is totally reflected by the fourth total reflection surface, and emits light from the light emitting surface. Light source and
At least, an incoming light portion that collimates the light from the light source, a first total reflecting surface on which the light from the light source collimated by the incoming light unit is incident, and a reflected light from the first total reflecting surface are incident. The second total reflecting surface, the third total reflecting surface to which the reflected light from the second total reflecting surface is incident, the fourth total reflecting surface to which the reflected light from the third total reflecting surface is incident, and the first. 4 A lens body including a light emitting surface from which reflected light from all reflecting surfaces is emitted is provided.
The fourth total reflection surface and the light emission surface form a wedge-shaped lens portion in which the thickness between the light emission surface and the fourth total reflection surface decreases from the base end portion toward the tip end portion.
The fourth total reflection surface includes a plurality of structures and contains a plurality of structures.
The light source enters the lens body from at least the light input portion, is collimated at the light input portion, and is in this order on the first total reflection surface, the second total reflection surface, and the third total reflection surface. The narrow angle direction in which light is emitted from the light emitting surface by being fully reflected and reaching the tip of the wedge-shaped lens portion or its vicinity, and being totally reflected by the plurality of structures provided on the fourth total reflection surface. Lights for vehicles that emit the light of. The light source further enters the lens body from the light input portion, is collimated by the light input portion, and is totally reflected by the first total reflection surface to the tip portion of the wedge-shaped lens portion or its vicinity. A wide angle in which the optical path length in the wedge-shaped lens portion is shorter than the light in the narrow angle direction, which is emitted from the light emitting surface by being totally reflected by the plurality of structures provided on the fourth total reflecting surface before reaching. The vehicle lighting device according to claim 6, which emits light in a direction. A first light guide portion arranged in front of the light source, a second light guide portion extending diagonally from the end of the first light source portion on the anti-light source side with respect to the light irradiation direction of the light source, and the first light source portion. 2 Includes a wedge-shaped lens portion extending from the tip end portion of the light guide portion to the anti-second light guide portion side and in a direction intersecting the optical axis of the light source.
The first light guide portion includes a light input portion and a first total reflection surface.
The second light guide portion includes a second total reflection surface and a third total reflection surface.
The wedge-shaped lens portion includes a light emitting surface arranged on the anti-light source side and a fourth total reflection surface arranged on the opposite side thereof, and becomes the light emitting surface toward the tip end portion of the wedge-shaped lens portion. It is a wedge-shaped lens portion having a thin thickness between the fourth total reflection surface and the above-mentioned total internal reflection surface.
The light input unit is a light input unit that is arranged in front of the light source and collimates the light from the light source that enters from the light source.
The first total reflection surface is in a state of being inclined so that the collimated light incident on the first total reflection surface is totally reflected toward the second total reflection surface. It is placed on the optical path of the collimated light from the part,
The second total reflection surface is in a state of being inclined so that the reflected light from the first total reflection surface incident on the second total reflection surface is totally reflected toward the third total reflection surface. It is arranged on the optical path of the reflected light from the first total reflecting surface,
The third total reflection surface is inclined so that the reflected light from the second total reflection surface incident on the third total reflection surface travels in the wedge-shaped lens portion toward the tip end portion of the wedge-shaped lens portion. In the state, it is arranged on the optical path of the light reflected from the second total reflection surface.
The fourth total reflection surface includes a plurality of structures arranged on the optical path of the light reflected from the third total reflection surface.
The plurality of structures are lenses configured such that the reflected light from the third total reflecting surface incident on the plurality of structures is totally reflected toward the light emitting surface and emitted from the light emitting surface. body.

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