JP6901315B2 - Lamp unit and vehicle lamp - Google Patents

Description

The present invention relates to a vehicle lamp, and more particularly to a lamp unit including a light source unit including a plurality of light emitting elements, and a vehicle lamp using the same.

Conventionally, a vehicle lamp including a light source such as an LED, a reflector, and an inner lens for guiding the light from the light source to the reflector is known. For example, in Patent Document 1, the inner lens is provided with a reflecting surface that internally reflects (totally reflects) the light traveling in the lens, and the light reflected by this reflecting surface is incident on the reflector to irradiate the front of the lamp. Such vehicle lighting equipment is disclosed.

On the other hand, in recent years, in order to increase the amount of light, an LED socket having a plurality of light emitting elements as in Patent Document 2 has been used as a light source unit for a vehicle lamp.

Under such circumstances, there has been a demand for the development of a vehicle lamp having a new structure in which a light source unit having a plurality of light emitting elements is used and the light from the light source is guided to a reflector by an inner lens.

Japanese Unexamined Patent Publication No. 2015-225832 Japanese Unexamined Patent Publication No. 2015-217044

However, the inner lens of Patent Document 1 is configured to internally reflect (total reflection) the light emitted from the light emitting element arranged at the focal position on the total reflection surface and emit it toward the reflector. Therefore, when an attempt is made to apply a light source unit provided with a plurality of light emitting elements as a light source for a vehicle lamp using an inner lens, the light transmitted without being totally reflected by the total reflection surface becomes leakage light for the following reasons. However, there is a problem that the light is emitted from the vehicle lamp as uncontrolled light.

The inner lens of Patent Document 1 controls light as shown in FIG. FIG. 10A is a diagram corresponding to FIG. 7 of Patent Document 1. The light emitting element 2 (LED 24 in Patent Document 1) is arranged at the focal position of the inner lens 4 (the same lens 26). Of the light emitted from the light emitting element 2, the light having a relatively small emission angle is incident on the first incident surface 6a (the first incident surface 30a) and refracted so as to be parallel light. On the other hand, among the light emitted from the LED 2, the light having a relatively large emission angle is incident on the second incident surface 6b (the second incident surface 30b), and is parallel light on the lower side surface 7 (the lower side surface 36). It is internally reflected (total reflection) so that it becomes. The light that has become parallel light is totally reflected by the total reflection surface 8 (the reflection surface 32) toward the emission surface 9 (the emission surface 34).

However, when a light source unit including a plurality of light emitting elements is used as shown in FIG. 10B, if one light emitting element 2a is arranged at the focal position of the inner lens 4, the other light emitting elements 2b will be focused on the inner lens 4. It deviates from the position. As a result, as shown by the dotted and alternate long and short dash arrows in FIG. 10B, the light emitted from the light emitting element 2b is incident on the first incident surface 6a or the second incident surface 2b, but is combined with parallel light. It will also include things that are not controlled to be. Specifically, when the incident angle is smaller than the light emitted by the light emitting element 2a arranged at the focal length, the incident angle approaches the focal length as shown by the arrow of the alternate long and short dash line. When the light emitting element 2a arranged in the above is larger than the light emitted from the light emitting element 2a, the light emitting element 2a is controlled so as to move away from the axis line Ax as shown by the dotted arrow. Since the angle of incidence on the total reflection surface 8 of the light controlled to approach the axis Ax is smaller than the critical angle, the light is not totally reflected by the total reflection surface 8 and a part of the light is transmitted through the total reflection surface 8. Then, it becomes leaked light and is emitted from the vehicle lighting equipment as uncontrolled light.

The present invention has been made in view of the above circumstances, has a novel structure in which a light source unit including a plurality of light emitting elements is provided, and light from the light source is guided to a reflector by an inner lens, and is uncontrolled. An object of the present invention is to provide a vehicle lamp that prevents the emission of light.

In order to achieve the above object, the lamp unit according to one aspect of the present invention is a light source unit including a plurality of light emitting elements and an inner lens that reflects light incident from the light emitting elements, and is an incident portion. A lens light guide unit that guides the light incident on the incident portion toward the front of the lamp, a reflection unit having a total reflecting surface that reflects the light from the lens light guide unit, and the light reflected by the reflection unit in a predetermined direction. An inner lens having an exiting portion, a first reflector arranged in the predetermined direction, reflecting light incident from the inner lens and emitting light to the front of the lamp, and an inner lens arranged in front of the inner lens. It is characterized by including a shade that shields or diffuses and transmits leaked light that is incident on the entire reflecting surface and is transmitted without being reflected.

In the above aspect, it is also preferable that the second reflector is further provided, and the second reflector reflects the light incident from the first reflector and emits it to the front of the lamp.

In the above aspect, the first reflector includes a light guide incident portion, a reflector light guide portion, and a light guide exit portion, and a part of the light incident from the inner lens is for the light guide. It is also preferable that the light is incident on the incident portion, transmitted through the reflector light guide portion, and is emitted from the light guide exit portion to the front of the lamp.

In the above aspect, the shade is formed of a light-transmitting member and includes a shielding portion that shields the leaked light and a transmitting portion that diffuses and transmits the leaked light, and the shielding portion is the second. It is also preferable that the second reflector is provided with a reflector and the second reflector is formed by vapor deposition.

In the above aspect, it is also preferable to provide a plurality of diffusion steps on the incident surface of the transmission portion.

Further, the vehicle lamp according to one aspect of the present invention is characterized by including the lamp unit according to the above aspect.

As described above, the lighting unit and the vehicle lighting according to the preferred embodiment of the present invention have an inner lens in a configuration in which light from a plurality of light emitting elements is incident on the inner lens and totally reflected toward the reflector by using the inner lens. Since the shade is provided so that the leaked light transmitted without being totally reflected by the total reflection surface of the lens is shielded or diffused and transmitted, the leaked light of the inner lens is not emitted to the front of the lamp as uncontrolled light. As a result, it is possible to provide a vehicle lamp having a novel structure in which a light source unit having a plurality of light emitting elements is provided and the light from the light source is guided to a reflector by an inner lens, and the emission of uncontrolled light is prevented. Can be done.

It is a front view of the lamp fixture for a vehicle which concerns on one Example of this invention. It is an exploded perspective view of the lamp unit which concerns on the same Example. It is a perspective view of the assembled state of the lamp unit which concerns on the same Example. It is a figure which shows the arrangement of the light emitting element in the light source unit which concerns on the same Example. It is a figure which shows the structure of the inner lens which concerns on the same Example. (A) is a front view of the inner lens, (b) is a perspective view seen from the front, and (c) is a perspective view seen from the rear. It is sectional drawing which shows the structure of the inner lens which concerns on the same Example. (A) is a cross-sectional view taken along the VIA-VIA line of FIG. 5 (a), and (b) is a cross-sectional view taken along the VIB-VIB line of FIG. 5 (a). FIG. 5 is a cross-sectional view taken along the line VII-VII of FIG. 1 of the vehicle lamp according to the same embodiment. It is a front view of the vehicle lamp according to another embodiment of this invention. FIG. 5 is a cross-sectional view taken along the line IX-IX of FIG. 8 of the vehicle lamp according to the same embodiment. (A) is a figure which shows the light control of a conventional inner lens, and (b) is a figure which shows the light control of a conventional inner lens when a plurality of light emitting elements are used.

Hereinafter, the vehicle lamp according to the embodiment of the present invention will be described with reference to the drawings based on the examples. In the following description, terms indicating directions such as "up", "down", "front", and "rear" are used to irradiate the lamp in the posture when the vehicle lamp is mounted on the vehicle, unless otherwise specified. It shall indicate the direction with the direction forward. Further, in each embodiment, the same members are designated by the same reference numerals, and duplicate description will be omitted.

[Example 1]
FIG. 1 is a front view of a vehicle lamp 10 according to an embodiment of the present invention. The vehicle lighting fixture 10 is a tail-and-stop lamp mounted on the left and right rear of the vehicle.

As shown in FIG. 1, the vehicle lamp 10 includes a container-shaped lamp body 12 that opens to the front and a transparent front cover 14 that covers the opening on the front of the lamp body 12. The lamp body 12 and the front cover 14 define the lamp chamber 16. The lamp unit 18 is provided in the lamp chamber 16. As shown in the cross-sectional view of FIG. 7, the lamp unit 18 is inserted and held in the holder mounting hole 19 on the back surface of the lamp body 12 and fixed.

FIG. 2 is an exploded perspective view of the lamp unit 18, and FIG. 3 is a perspective view of the lamp unit 18 assembled. The lamp unit 18 includes a light source unit 20, a lens holder 22, an inner lens 24, a shade 26, and a first reflector 28. The light source unit 20, the lens holder 22, the inner lens 24, the shade 26, and the first reflector 28 are arranged in this order toward the front, and their central axes are the optical axes of the inner lens 24 shown in FIG. It is arranged so as to match the axis line Ax that matches.

The light source unit 20 includes a wiring board 30, a housing 31, a heat radiating portion 32, and a power connector portion 33 shown in a cross-sectional view in FIG. The wiring board 30 mounts a light emitting element 34. FIG. 4 is a diagram schematically showing the arrangement of the light emitting elements 34 on the wiring board 30. As shown in FIG. 4, the light emitting element 34 is arranged so that the four light emitting elements 34b are the vertices of a square with one light emitting element 34a as the center. As the light emitting element 34, for example, a light emitting diode (LED) is used. Further, in addition to the light emitting element 34, the wiring board 30 mounts an electronic component 35 such as a control circuit element for controlling the light emitting element 34 and a power receiving device for receiving electric power.

As shown in FIG. 2, the housing 31 accommodates the wiring board 30 so that the light emitting element 34 faces forward, that is, toward the inner lens 24. The housing 31 is provided with a locking projection 36 for locking to the lens holder 22 on the outer peripheral surface of the front end opening. The heat radiating unit 32 is composed of a plurality of heat radiating fins 37. The heat radiating fins 37 project rearward from the upper part of the back surface of the housing 31.

As shown in FIG. 7, the power connector portion 33 projects rearward from the lower part of the back surface of the housing 31 in a tubular shape that opens rearward. An insertion hole 38 for inserting into the power connector portion 33 is provided inside the housing 31, and a power receiving terminal 39 connected to the wiring board 30 projects from the insertion hole 38 into the power connector portion 33.

As shown in FIG. 2, the lens holder 22 is a resin cylindrical member. As shown in FIG. 7, the lens holder 22 includes a light source mounting portion 40 inside the rear end side. The light source mounting portion 40 has a donut disc shape with a circular opening, and includes a locking portion 44 corresponding to a locking projection 36 of the light source unit 20. The light source unit 20 is attached to the lens holder 22 by locking the locking projection 36 to the locking portion 44.

On the outer periphery of the lens holder 22 on the front end side, three rectangular windows 46 matching the three exit surfaces 66a, 66b, 66c of the inner lens 24 shown in FIGS. 5 (a) and 5 (b) are formed in the circumferential direction. They are provided at equal intervals. In front of each window 46, blades 48 for attaching the shade 26 project vertically from the outer periphery of the lens holder 22 toward the outside. Each blade 48 is provided with a screw hole 50.

Further, on the inner circumference of the lens holder 22, three grooves 52 for engaging the inner lens 24 are provided between the three windows 46 up to the same position as the rear end portion of the window 46 at equal intervals in the circumferential direction. It is provided at a distance. Further, a notch 54 for positioning the shade 26 is provided at the front end of the three grooves 52.

5A and 5B are views showing the configuration of the inner lens 24, FIG. 5A is a front view of the inner lens 24 as viewed from the front surface, FIG. 5B is a perspective view seen from the front surface, and FIG. Is a perspective view seen from the rear surface. 6 (a) is a cross-sectional view of the inner lens 24 along the VIA-VIA line of FIG. 5 (a), and FIG. 6 (b) is a cross-sectional view of the inner lens 24 along the VIB-VIB line of FIG. 5 (a). is there.

The inner lens 24 is made of a transparent resin material such as acrylic. As a whole, the inner lens 24 has a regular triangular prism 68 shown by a virtual line in FIG. 5 (a) as a bottom surface, and a regular triangular prism having a predetermined side length d shown in FIG. 5 (b) is combined with the bottom surface of the regular triangular prism. A shape obtained by hollowing out an inverted regular triangular pyramid having a height of a flat upper surface and a predetermined side surface length d, and cutting out three corners 68A, 68B, 68C of the regular triangular prism with surfaces 68a, 68b, 68c parallel to the opposite sides. Has.

As shown in FIGS. 5 and 6, the inner lens 24 guides the light from the light emitting element 34 to the incident portion 60 incident on the lens and the light incident on the incident portion 60 toward the front of the lamp. The unit 62 includes a reflection unit 64 that internally reflects (totally reflects) the light traveling through the lens light guide unit 62, and an exit unit 66 that emits the light reflected by the reflection unit 64 in a predetermined direction.

The inner lens 24 includes an incident portion 60 on the bottom surface side of the regular triangular prism, an emitting portion 66 on the side surface, and a reflecting portion 64 on the side hollowed out by the inverted regular triangular pyramid. As shown in FIG. 2, the inner lens 24 is arranged with the incident portion 60 facing rearward and the reflecting portion 64 facing forward.

A concentric triple Fresnel step 70 is formed in the incident portion 60.

As shown in FIG. 6B, in the incident portion 60, the optical axis of the inner lens 24 that matches the axis Ax is arranged at the center of the plurality of light emitting elements 34 provided in the light source unit 20. It is arranged at the focal position on the optical axis of 34a so as to face the light emitting element 34. Therefore, the other light emitting element 34b is arranged so as to deviate from the focal position of the inner lens 24.

The reflection unit 64 includes a first total reflection surface 64a, a second total reflection surface 64b, and a third total reflection surface 64c. The exit unit 66 includes a first exit surface 66a, a second exit surface 66b, and a third exit surface 66c. The first portion 24a of the inner lens 24 includes a first total reflection surface 64a and a first exit surface 66a. Further, the second portion 24b includes a first total reflection surface 64b and a first exit surface 66b. Further, the third portion 24c includes a third total reflection surface 64c and a first exit surface 66c. The first portion 24a, the second portion 24b, and the third portion 24c of the inner lens 24 are divided into three equal parts so as to be three times symmetrical about the axis Ax.

The total reflection surfaces 64a, 64b, 64c are configured to totally reflect the light traveling from the incident portion 60 as parallel light in the lens light guide portion 62 toward the exit surfaces 66a, 66b, 66c, respectively. There is.

A holder engaging surface 69 is formed between the exit surfaces 66a, 66b, and 66c provided on the side surface of the inner lens 24, respectively. The holder engaging surface 69 has a width consistent with the three grooves 52 of the lens holder 22. The inner lens 24 is attached to the lens holder 22 by fitting the holder engaging surface 69 with the groove 52 of the lens holder 22. As a result, the exit surfaces 66a, 66b, 66c of the inner lens 24 are exposed to the outside from the three windows 46 of the lens holder 22.

The holder engaging surface 69 is provided with an engaging lance (not shown) and is held in the front-rear direction by an appropriate means such as engaging with an engaging portion (not shown) provided in the groove 52 of the lens holder 22. There is.

Hereinafter, the light traveling in the inner lens 24 will be described with reference to FIG. 6B. The light emitted from the light emitting element is radiated in all directions (Lumbercyan). Further, since the first portion 24a, the second portion 24b, and the third portion 24c of the inner lens 24 have a three-fold symmetric relationship with respect to the axis Ax, only the first portion 24a will be described and overlapped. The description to be made is omitted.

When the light emitted from the light emitting element 64a arranged at the focal position of the inner lens 24 is incident on the incident portion 60, it is refracted or totally reflected as shown by the solid line arrow, and is parallel in the lens light guide portion 62. It is controlled to travel toward the front of the lamp as light.

On the other hand, when a part of the light emitted from the light emitting element 34b arranged so as to deviate from the focal position of the inner lens 24 is incident on the incident portion 60 like the light emitted from the light emitting element 34a, the lens guide is provided. The inside of the portion 62 is controlled to travel toward the front of the lamp as parallel light. However, as shown by the dotted arrow, the other part travels toward the front of the lamp without becoming parallel light in the lens light guide portion 62.

Light traveling toward the front of the lamp as parallel light in the lens light guide portion 62 is totally reflected (internal reflection) when it is incident on the total reflection surface 64a as shown by the solid line arrow. The light reflected by the total reflection surface 64a is emitted toward the emission surface 66a as parallel light, and is directed from the emission surface 66a in a predetermined direction in which the first reflection surface 86 of the first reflector 28, which will be described later, is arranged. It is emitted toward.

On the other hand, the light traveling toward the front of the lamp without becoming parallel light in the lens light guide portion 62 is incident on the total reflection surface 64a as shown by the dotted arrow, and a part of the light is internally reflected. It is incident on the exit surface 66a and is emitted from the exit surface 66a in a predetermined direction in which the first reflection surface 86 of the first reflector 28 is arranged. However, the other part is not reflected on the inner surface but is transmitted through the total reflection surface 64a and becomes leaked light emitted to the front of the inner lens 24.

Next, as shown in FIG. 2, the shade 26 includes three plate-shaped portions 71 having a logical product gate symbol-like shape. The plate-shaped portion 71 is curved in the axis Ax direction toward the axis Ax. The three plate-shaped portions 71 are formed so that the outer curved portion 72 of the plate-shaped portion 71 comes closest to the plate-shaped portion 71. The plate-shaped portion 71 has a wall 74 perpendicular to the curved surface from the outer straight portion of the plate-shaped portion 71. The walls 74 of each plate-shaped portion 71 are joined by a rectangular wall joint 75 having a surface parallel to the optical axis.

Further, as shown in FIG. 7, a substantially hemispherical dome portion 76 having the same diameter as the lens holder 22 is configured to abut on the inner peripheral surface of the outer curved portion 72 of the three plate-shaped portions 71. The front opening is closed.

A step 78 that engages with the outer edge of the blade 48 of the lens holder 22 is formed on the inner peripheral surface near the opening behind the shade 26. Further, inside the opening behind the shade 26, blades (not shown) projecting inward for attaching to the blades 48 of the lens holder 22 are provided on each plate-shaped portion 71. The blade of the plate-shaped portion 71 is provided with a mounting hole at a position consistent with the screw hole 50 of the lens holder 22.

As shown in FIGS. 2 and 3, the shade 26 is attached to the lens holder 22 as follows. First, with the inner lens 24 attached to the lens holder 22, the rear end 75a of the wall joint 75 provided in the adjacent plate-shaped portion 71 is engaged with the notch 54 of the lens holder 22 and the step 78. Is engaged with the blade 48 of the lens holder 22 for positioning. Next, the mounting holes (not shown) of the blades of the shade 26 and the screw holes 50 of the blades 48 of the lens holder 22 are aligned and screwed from the rear.

On the side surface of the shade 26, a second reflecting surface 92 that functions as a second reflector 88, which will be described later, is formed by thin-film aluminum deposition or the like.

The first reflector 28 includes a frame 80 that surrounds the shade 26. The frame 80 includes three dogleg-shaped members 82 having a front-view dogleg shape. The V-shaped member 82 has a bent portion 82a in which a surface parallel to the axis Ax direction is bent so as to project toward the axis Ax at the center, and an end having surfaces parallel to the axis Ax on both sides of the bent portion 82a. It is composed of a part 82b. In the V-shaped member 82, the front side in the axis Ax direction is curved toward the rear in the axis Ax direction, and the side behind the axis Ax direction is bent rearward in the axis Ax direction.

The frame 80 is made of, for example, resin or the like. The frame 80 is formed by three V-shaped members 82 arranged at equal intervals in the circumferential direction and three plate-shaped members 84 connecting the end portions 82b of the adjacent V-shaped members 82, and the shade 26. It is configured to surround the.

As shown in FIGS. 3 and 7, the first reflector 28 includes a first reflecting surface 86 formed by thin-film aluminum deposition or the like on the surface of the plate-shaped member 84 toward the shade 26. The first reflecting surface 86 is formed in a partially elliptical cross section. The plate-shaped portion 71 of the shade faces the same circumferential direction as the three exit surfaces 66a, 66b, 66c of the inner lens 24, respectively. Therefore, the three first reflection surfaces 86 of the first reflector 28 , The three exit surfaces 66a, 66b, 66c of the inner lens 24 are also arranged to face each other. The first reflector 28 is the first reflecting surface 86, which reflects the light emitted from the emitting surfaces 66a, 66b, 66c of the inner lens 24 and emits the light toward the second reflector 88. The front of the lamp is illuminated via the reflector 88.

In the first reflector, the rib 89 provided on the inner surface of the bent portion 82a at the center of each of the doglegged members 82 of the frame 80 is engaged with the outer surface of the three wall joints 75 of the shade 26 to be engaged with the shade 26. It is attached to. Since the dogleg shape of the dogleg member 82 and the shape formed by the wall 74 and the wall joint 75 are similar to each other, the first reflector 28 and the shade 26 are in close contact with each other. It is held around in the circumferential direction. Further, the frame 80 can be fixed in the front-rear direction by an appropriate means such as providing a separate rib in the vicinity of the rear end 75a of the wall joint portion 75 of the shade 26 and screwing it to the dogleg-shaped member 82.

Therefore, the vehicle lamp 10 is assembled as follows. First, the inner lens 24 is attached to the lens holder 22. Next, the shade 26 is positioned from the front and screwed to the lens holder 22. Further, the first reflector 28 is positioned from the front and fixed to the shade 26. Further, the light source unit 20 is inserted and attached from the rear of the lens holder 22. In this way, the lamp unit 18 assembled as shown in FIG. 3 is inserted into the holder mounting hole 19 on the back surface of the lamp body 12 and fixed by an appropriate means. Finally, the front cover 14 is attached to complete the assembly.

The second reflector 88 reflects the light from the first reflecting surface 86 of the first reflector 28 and illuminates the front of the lamp. The second reflector is not essential and may be configured to directly illuminate the front with the first reflective surface 86 of the first reflector 28.

However, if the second reflector 88 is provided and the light incident from the first reflector 28 is reflected to irradiate the front, the shape and area of the second reflector 88 can be appropriately set. The light emitting portion of the lamp unit 18 can be freely shaped and the area of the light emitting portion can be increased.

As a result, it is possible to provide vehicle lighting fixtures that have a high degree of freedom in design and meet various needs. Further, if the area of the light emitting portion is increased, the visibility of the vehicle lamp is improved, and the safety is improved.

In this embodiment, the second reflector 88 is integrally formed on the front surface of the shade 26, but the second reflector 88 can be configured separately from the shade 26.

A plurality of Y-shaped reflection steps 90 are provided on the surface of the second reflector 88. The reflection step 90 is not essential, but it is advantageous if the reflection step 90 is provided because the amount of light emitted to the front of the lamp increases. As a result, the visibility of the vehicle lamp 10 is improved, and the safety is improved. In this embodiment, the Y-shaped reflection step is provided, but any conventionally known reflection step such as a grid shape, a step shape, or a dot shape can be provided.

Next, a state of irradiating light from the vehicle lamp 10 will be described with reference to FIG. 7. FIG. 7 is a cross-sectional view of the vehicle lamp 10 along the line VII-VII of FIG. Further, as described above, the first portion 24a, the second portion 24b, and the third portion 24c of the inner lens 24 have a three-fold symmetric relationship with respect to the axis Ax, and thus the first portion shown in the drawing. The description of 24a shall also apply to other parts.

Most of the light emitted from the light emitting element 34 of the light source unit 20 is incident on the incident portion 60 of the inner lens 24 as shown by the solid line arrow, and the lens light guide portion 62 is directed to the front of the lamp as parallel light. Is guided. The light traveling toward the front of the lamp as parallel light in the lens light guide portion 62 is totally reflected (internal reflection) by the total reflection surfaces 64a, 64b, 64c. The light reflected by the total reflection surfaces 64a, 64b, 64c heads toward the exit surfaces 66a, 66b, 66c as parallel light.

The exit surfaces 66a, 66b, 66c emit light that has traveled as parallel light toward the first reflection surface 86 of the first reflector 28 that faces each other. The light from the exit surfaces 66a, 66b, 66c is reflected by the first reflecting surface 86 of the first reflector 28 toward the opposite second reflector 88. The second reflector 88 reflects the light from the first reflector 28 and irradiates the lamp forward.

A part of the light emitted from the light emitting element 34 of the light source unit 20 is incident on the incident portion 60 of the inner lens 24 as indicated by the dotted arrow, but the light guide portion 62 of the lens light guide portion 62 is not converted into parallel light. Guided toward the front of the lamp. The light traveling toward the front of the lamp without becoming parallel light in the lens light guide portion 62 is internally reflected by the total reflection surfaces 64a, 64b, 64c, but a part of the light is internally reflected by the total reflection surfaces 64a, 64b, 64b, It passes through 64c and becomes leaking light. The leaked light is emitted from the front surface of the total reflection surfaces 64a, 64b, 64c toward the front of the vehicle, but is shielded by the shade 26.

As described above, in the vehicle lamp 10 including the light source unit 20 including the plurality of light emitting elements 34, the shade 26 is attached to the front of the inner lens 24 (behind the inner lens 24 on the optical path) so as to cover the inner lens 24. Then, the reflecting portion 64 of the inner lens 24 shields the leaked light transmitted without being totally reflected. As a result, in the vehicle lamp 10 including the light source unit 20 including the plurality of light emitting elements 34, the leaked light of the inner lens 24 is prevented from being emitted to the front of the lamp as uncontrolled light.

[Example 2]
The lamp unit 118 of the vehicle lamp 100 according to the second embodiment is the lamp unit 18 of the vehicle lamp 10 of the first embodiment configured as described later, and the other configurations are the vehicle lamp 10 of the first embodiment. It is the same.

FIG. 8 is a front view of the vehicle lamp 100 according to the second embodiment, and FIG. 9 is a cross-sectional view of the vehicle lamp 100 along the IX-IX line of FIG. In the second embodiment, the plate-shaped member 184 of the first reflector 128 is composed of a light guide member. The plate-shaped member 184 is provided with a first reflecting surface 186 on the front end side of the surface on which light from the exit surfaces 66a, 66b, 66c of the inner lens 24 is incident, and a light guide incident portion 194 on the rear end side. Be prepared. Further, the plate-shaped member 184 is provided with a reflector light guide portion 197 inside, and is provided with a light guide exit portion 198 at the front end.

On the other hand, the shade 126 has the same shape as the shade 26 of the first embodiment, but is entirely composed of a translucent member. On the side surface of the shade 126, a second reflecting surface 192 that functions as a second reflector 188 is formed by thin-film aluminum deposition or the like. A plurality of Y-shaped reflection steps 190 are provided on the surface of the second reflection surface 192. Further, the dome portion 176 of the shade 126 is not vapor-deposited with aluminum, and a diffusion step 196 is formed on the inner incident surface. Therefore, in the second embodiment, the dome portion 176 functions as a transmission portion.

A state of irradiating light in the vehicle lamp 100 according to the second embodiment will be described. Most of the light emitted from the light emitting element 34 of the light source unit 20 is incident on the incident portion 60 of the inner lens 24 as shown by the solid line arrow, and the lens light guide portion 62 is directed to the front of the lamp as parallel light. Be guided. The light traveling toward the front of the lamp as parallel light in the lens light guide portion 62 is totally reflected (internal reflection) by the total reflection surface 64a. The light reflected by the total reflection surface 64a is emitted as parallel light toward the exit surface 66a, and is emitted from the emission surface 66a toward the first reflection surface 186 of the first reflector 128 facing each other. ..

A part of the light emitted from the exit surface 66a is reflected by the first reflection surface 186 of the first reflector 128 toward the opposite second reflector 188, as indicated by the dotted arrow. The second reflector 188 reflects the light from the first reflector 127 and irradiates it in front of the lamp as parallel light. The other part of the light emitted from the exit surface 66a is incident on the plate-shaped member 184 from the light guide incident portion 194 as indicated by the arrow of the alternate long and short dash line. The light incident on the plate-shaped member 184 is internally reflected from the reflector light guide unit 197 and travels forward, and is emitted from the light guide exit unit 198 toward the front of the lamp.

With this configuration, in addition to the second reflector 188 shown in FIG. 8, the front end surface 198 of the plate-shaped member 184 of the first reflector 128 shines. Therefore, the area of the light emitting portion in the vehicle lamp 100 increases. As a result, the visibility of the vehicle lamp 100 is improved, and the safety is improved.

On the other hand, among the light emitted from the plurality of light emitting elements 34 of the light source unit 20, the leaked light that is not internally reflected by the total reflection surface 64a of the inner lens 24 and is transmitted through the total reflection surface 64a is indicated by a dotted arrow. In addition, it is emitted from the front surface of the total reflection surface 64a toward the front of the vehicle. Next, the light transmitted from the front surface of the total reflection surface 64a enters the dome portion 176 while being diffused by the diffusion step inside the dome portion 176, passes through the dome portion 176, and irradiates from the front surface toward the front of the lamp. Will be done.

In this way, the dome portion 176 of the shade 126 is configured to diffuse and transmit the leaked light transmitted through the reflecting portion 64 of the inner lens 24 without being totally reflected, so that the light source unit 20 including the plurality of light emitting elements 34 is provided. In the vehicle lamp 100 provided with the above, it is possible to prevent the leaked light of the inner lens 24 from being emitted to the front of the lamp as uncontrolled light.

Further, with such a configuration, in addition to the second reflector 192 shown in FIG. 8, the dome portion 176 shines, so that the area of the light emitting portion in the vehicle lamp 100 is further increased. As a result, the visibility of the vehicle lamp 100 is further improved, and the safety is improved.

Although the preferred embodiments of the present invention have been described above, the above-described embodiment is an example of the present invention, and these can be combined based on the knowledge of those skilled in the art, and such embodiments are also described in the present invention. Included in the range.

For example, in the above embodiment, a vehicle lamp having a shape in which the first reflectors are arranged in three directions is illustrated, and the inner lens is designed to have three exit surfaces according to the example. The number of exit surfaces can be designed according to the shape. For example, the first reflector can be arranged in any direction such as four directions and five directions, and the exit surface of the inner lens can be designed to face the first reflector.

10 Vehicle lighting 18 Lighting unit 20 Light source unit 24 Inner lens 26 Shade 28 First reflector 34 Light emitting element 60 (Inner lens) Incident part 62 (Inner lens) Lens light guide part 64 (Inner lens) Reflector 64a , 64b, 64c Total reflecting surface 66 (inner lens) Ejecting part 88 Second reflector 118 Lamp unit 128 First reflector 176 Transmissive part (dome part)
188 Second reflector 194 Light guide incident part 196 Diffusion step 197 Reflector light guide part 198 Light guide exit part

Claims (6)

A light source unit equipped with multiple light emitting elements and
An inner lens that reflects light incident from the light emitting element.
Incident part,
Lens light guide that guides the light incident on the incident part toward the front of the lamp,
An inner lens including a reflecting portion having a total reflection surface that reflects light from the light guide portion of the lens and an exit portion that emits light reflected by the reflecting portion in a predetermined direction.
A first reflector, which is arranged in the predetermined direction, reflects the light incident from the inner lens, and emits the light to the front of the lamp.
Wherein disposed in front of the inner lens, the incident on the total reflection surface, the leaked light which passes through without reflection, a lamp unit Ru and a shade that blocks or diffuse transmission,
A lamp unit further comprising a second reflector, wherein the second reflector reflects the light incident from the first reflector and emits it to the front of the lamp. The first reflector includes a light guide incident portion, a reflector light guide portion, and a light guide exit portion, and a part of the light incident from the inner lens is incident on the light guide incident portion. Te, the reflector guide portion and the transmission, the lamp unit according to claim 1, wherein the emitted to the front of the lamp from the light-guiding emitting portion. The shade is formed of a light-transmitting member and includes a shielding portion that shields the leaked light and a transmitting portion that diffuses and transmits the leaked light, and the shielding portion includes the second reflector. The lamp unit according to claim 1 or 2 , wherein the second reflector is formed by vapor deposition. The lamp unit according to claim 3 , wherein the incident surface of the transmission portion is provided with a plurality of diffusion steps. A light source unit equipped with multiple light emitting elements and
An inner lens that reflects light incident from the light emitting element.
Incident part,
Lens light guide that guides the light incident on the incident part toward the front of the lamp,
A reflector having a total reflection surface that reflects light from the lens light guide, and a reflector.
An inner lens having an exit portion that emits light reflected by the reflection portion in a predetermined direction, and an inner lens.
A first reflector, which is arranged in the predetermined direction, reflects the light incident from the inner lens, and emits the light to the front of the lamp.
A lamp unit that is arranged in front of the inner lens and has a shade that shields or diffuses the leaked light that is incident on the total reflection surface and is transmitted without being reflected.
The first reflector includes a light guide incident portion, a reflector light guide portion, and a light guide exit portion, and a part of the light incident from the inner lens is incident on the light guide incident portion. The lamp unit is characterized in that the light is transmitted through the reflector light guide portion and is emitted from the light guide exit portion to the front of the lamp. A vehicle lamp comprising the lamp unit according to any one of claims 1 to 5.

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