JP2023034925A - Vehicle lamp unit and vehicle lamp device - Google Patents

Abstract

To provide a vehicle lamp unit capable of reducing the number of components and reducing its thickness and space, and a vehicle lamp device.SOLUTION: A vehicle lamp unit comprises a substrate 2, a light source 3 and a lens member 4. The lens member 4 has an incident part 40, an incident-side reflection part 41, an emission-side reflection part 42, and an emission part 43. An emission direction of light L0 from the light source 3 and an emission direction of emission light L8 from the emission part 43 of the lens member 4 are from front to back and are the same or substantially the same direction. As a result, the number of components can be reduced, and a thickness and a space can be reduced.SELECTED DRAWING: Figure 2

Description

The present invention relates to a vehicle lamp unit. The present invention also relates to a vehicle lamp device.

As a vehicle lamp unit and a vehicle lamp device that form a light emitting surface of an arbitrary design surface, there is, for example, one disclosed in Patent Document 1. Patent Document 1 will be described below.

The vehicle lamp disclosed in Patent Document 1 includes a light source and an inner lens. The light source is composed of a light emitting portion and a substrate portion. The inner lens is provided with an incident surface, a reflective surface, and an exit surface.

The operation of the vehicle lamp of Patent Document 1 is as follows. That is, the light from the light emitting portion enters the inner lens through the incident surface as parallel light or nearly parallel light. The incident parallel light or nearly parallel light is reflected by the reflecting surface and emitted to the outside from the exit surface. As a result, an arbitrary designed light emitting surface is formed on the output surface.

JP 2013-161656 A

Such a vehicle lamp is required to be thin and space-saving by reducing the thickness of the vehicle lamp (the width in the direction in which light is emitted from the emission surface in the vehicle lamp of Patent Document 1). On the other hand, in such a vehicle lamp, as the number of mounted light sources (the light source portion in the vehicle lamp of Patent Document 1) and electronic control parts for controlling the lighting and extinguishing of the light source increases, the substrate (the above-mentioned In the vehicle lamp disclosed in Patent Document 1, the area of the mounting surface of the substrate portion tends to increase.

However, in the vehicle lamp of Patent Document 1, the direction of light emission from the light emitting portion and the direction of light emission from the emission surface are perpendicular or substantially perpendicular, and the direction of light emission from the light emitting portion and the substrate The surface direction of the mounting surface of the part is perpendicular or substantially perpendicular. Therefore, in the vehicle lamp of Patent Document 1, the surface direction of the mounting surface of the substrate portion and the light emitting direction from the light emitting surface are parallel or substantially parallel. As a result, when the area of the mounting surface of the substrate portion of the vehicle lamp of Patent Document 1 becomes large, the thickness of the vehicle lamp increases, making it difficult to reduce the thickness of the vehicle lamp and save space.

Here, in the vehicle lamp of Patent Document 1, the substrate portion is divided into a plurality of pieces, the light source portion is mounted on one substrate portion, and the remaining substrate portions are arranged parallel or substantially parallel to the emission surface. There is also a means for making the mounting surface of the remaining substrate portion perpendicular or nearly perpendicular to the direction of emission of light from the emission surface, thereby reducing the thickness of the vehicle lamp to save space. However, in the case of this means, it is necessary to divide the substrate into a plurality of parts, so the number of parts increases.

In this way, it is important for such a vehicle lamp to be able to reduce the number of parts and to achieve a thin and space-saving design.

SUMMARY OF THE INVENTION An object of the present invention is to provide a vehicle lamp unit and a vehicle lamp device that can reduce the number of parts and achieve a thin and space-saving design.

The vehicle lighting unit of the present invention comprises a substrate having a mounting surface, a light source mounted on one side of the mounting surface and emitting light perpendicularly or substantially perpendicularly to the direction of the mounting surface, and and a lens member arranged to face the light source, the lens member being provided on one side facing the light source, and provided on the one side with an incident portion through which the light from the light source is incident as incident light. , an incident-side reflecting portion that reflects incident light from one side to the other side, and an incident-side reflecting portion that is provided from the middle facing the mounting surface to the other side to reflect the reflected light from the incident-side reflecting portion toward the mounting surface. and an output-side reflecting portion that reflects light to the opposite side from the mounting surface. and an emitting portion that emits the light in the same direction or substantially the same direction as the light emitting direction to form a light emitting surface of an arbitrary design surface.

In the vehicle lamp unit of the present invention, the incident portion has an incident portion optical axis that is perpendicular or substantially perpendicular to the mounting surface, and at least part of the light from the light source is parallel or nearly parallel to the incident portion optical axis. The first incident side reflecting surface reflects part of the parallel incident light toward the output side reflecting section, and the rest of the parallel incident light is directed to the mounting surface. and a third incident-side reflecting surface for reflecting the reflected light from the second incident-side reflecting surface to the output-side reflecting section side, and an output-side The reflecting section has an output-side reflecting surface that reflects the reflected light from the first incident-side reflecting surface and the reflected light from the third incident-side reflecting surface toward the output section. It is preferable to have an emission surface that emits the reflected light of the above to the outside as emitted light to form a light emitting surface.

In the vehicle lamp unit of the present invention, at least part of the emission surface is composed of a light diffusion surface group that diffuses and emits reflected light from the emission side reflection surface to the outside as diffuse emission light, and the light diffusion surface group , forming a light-emitting surface.

In the vehicle lamp unit of the present invention, it is preferable that the emission-side reflecting surface and the group of light diffusing surfaces face each other.

A vehicle lighting device according to the present invention includes a lamp lens and a lamp housing forming a lamp chamber, and a vehicle lighting unit according to the present invention arranged in the lamp chamber.

INDUSTRIAL APPLICABILITY The vehicle lamp unit and the vehicle lamp device of the present invention can reduce the number of parts, and can be thin and space-saving.

FIG. 1 is a front view of a vehicle lamp unit and a vehicle lamp apparatus according to an embodiment of the present invention, showing the state of use. FIG. 2 is a vertical cross-sectional view (a cross-sectional view along the line II-II in FIG. 1 and a cross-sectional view along the line II-II in FIG. 3) showing the state of use. FIG. 3 is a front view (a view taken along line III-III in FIG. 2) showing the main part. FIG. 4 is a cross-sectional view (enlarged cross-sectional view taken along line IV-IV in FIG. 3) showing the main part. FIG. 5 is a partial perspective view showing the incident-side reflecting section. FIG. 6 is a partial vertical cross-sectional view showing the output-side reflecting section and the output section. FIG. 7 is a front view (a front view corresponding to FIG. 3) of a main portion showing Modification 1 of the light emitting surface. FIG. 8 is a vertical cross-sectional view of a main part showing Modification 1 of the light emitting surface. FIG. 8A is a cross-sectional view along line VIIIA-VIIIA in FIG. FIG. 8A is a cross-sectional view taken along line VIIIB--VIIIB in FIG. FIG. 9 is a front view (a front view corresponding to FIGS. 3 and 7) of a main part showing Modification 2 of the light emitting surface. FIG. 10 is a vertical cross-sectional view (cross-sectional view taken along the line XX in FIG. 9) of a main portion showing Modification 2 of the light emitting surface.

Hereinafter, one example of an embodiment (example) of a vehicle lamp according to the present invention will be described in detail with reference to the drawings.

In this specification, front, rear, top, bottom, left, and right refer to front, rear, top, bottom, left, and right when a vehicle is equipped with the vehicle lamp according to the present invention. In the drawings, the symbol "F" is "front", "B" is "rear", "U" is up, "D" is "down", "L" is "left", and "R" is "right". be. Here, the front view means viewing the front from the rear of the vehicle. Moreover, a planar view means looking down from above the vehicle.

Since the drawings are schematic diagrams showing the vehicle lamp according to the present invention, the main parts of the vehicle lamp according to the invention are illustrated, and the illustration of parts other than the main parts is omitted. Also, part of the hatching is omitted.

(Explanation of configuration of embodiment)
Hereinafter, a vehicle lamp unit 1U according to this embodiment (hereinafter referred to as "vehicle lamp unit 1U") and a vehicle lighting device 100 according to this embodiment (hereinafter referred to as "vehicle lighting device 100") ) will be described.

(Description of vehicle lighting device 100)
The vehicle lamp devices 100 are installed on the left and right sides of the rear part of a vehicle (automobile) not shown. The vehicle lighting device 100 is a rear combination lamp in this example.

As shown in FIGS. 1 and 2, the vehicle lighting device 100 includes a lamp housing 101, a lamp lens 102, and a vehicle lighting unit 1U.

The lamp housing 101 is made of a light-impermeable resin member. The lamp lens 102 is made of a light-transmissive resin member or glass. The lamp lens 102 is an outer lens or outer cover. The lamp lens 102 is along the design surface of the vehicle.

A lamp chamber 103 is formed by the lamp housing 101 and the lamp lens 102 . In the lamp chamber 103, a vehicle lamp unit 1U, one or a plurality of other vehicle lamp units (not shown), an inner panel (not shown), and the like are arranged.

(Description of vehicle lamp unit 1U)
The vehicle lamp unit 1U is a tail lamp, a stop lamp, or a tail/stop lamp in this example. The vehicle lamp unit 1U includes a substrate 2, a light source 3, a lens member 4, and an inner housing 5, as shown in FIGS.

(Description of substrate 2)
The substrate 2 has a rectangular plate shape, as shown in FIGS. One surface of substrate 2 (the surface facing lamp lens 102 ) forms mounting surface 20 . The surface direction of the mounting surface 20 is the vertical direction or the horizontal direction in this example.

A light source 3 is mounted on one side (lower side) of the mounting surface 20 . Electronic control components (not shown) are mounted on the mounting surface 20 . The electronic control component controls the lighting and extinguishing of the light source 3 . Electronic control components may also be mounted on the surface opposite to the mounting surface 20 of the substrate 2 .

The area of the mounting surface 20 of the substrate 2 tends to increase as the number of light sources 3 and electronic control components mounted increases. In this example, four light sources 3 are mounted.

(Explanation of light source 3)
In this example, the light source 3 is a self-luminous semiconductor light emitting device (semiconductor light emitting device) type light source such as LED, OEL or OLED (organic EL). The four light sources 3 are mounted on one side (lower piece) of the mounting surface 20 of the substrate 2, as shown in FIGS. The light source 3 has a light emitting element 30 on the surface opposite to the mounting surface 20 .

When electric power (current) is supplied to the light source 3 via the electronic control component, the light emitting element 30 emits light and emits the light L0 radially forward from behind.

(Description of lens member 4)
The lens member 4 is a light-transmissive member (resin member or the like), and in this example is made of a colorless and transparent resin material such as acrylic resin, PC (polycarbonate), PMMA (polymethyl methacrylate, methacrylic resin).

The lens member 4 is arranged to face the mounting surface 20 of the substrate 2, as shown in FIGS. The front view shape of the lens member 4 is rectangular (see FIGS. 1 and 3). The rectangular shape of the lens member 4 when viewed from the front and the rectangular shape of the substrate 2 when viewed from the front have substantially the same shape and size.

The lens member 4 has an incident portion 40 , an incident-side reflecting portion 41 , an exit-side reflecting portion 42 , and an exit portion 43 .

(Explanation of incident part 40)
The incident part 40 is provided on one side (lower piece) of the lens member 4 and on one surface of the lens member 4 (the surface facing the mounting surface 20 of the substrate 2). Four incident portions 40 are provided corresponding to the four light sources 3 . The four incident portions 40 are aligned in the horizontal direction.

The incident portion 40 has an incident portion optical axis Z. As shown in FIG. The incident portion optical axis Z is perpendicular or nearly perpendicular to the surface direction of the mounting surface 20 of the substrate 2 . The incident part 40 causes the light L0 from the light emitting element 30 of the light source 3 to enter as parallel incident lights L1 and L3 parallel or substantially parallel to the optical axis Z of the incident part.

The incident section 40 has a reflecting surface 400, a first incident surface 401 and a second incident surface 402, as shown in FIG. The incident portion optical axis Z passes through the centers of the reflecting surface 400 , the first incident surface 401 and the second incident surface 402 of the incident portion 40 . The first incident surface 401 and the second incident surface 402 are concave with respect to the reflecting surface 400 .

The first incident surface 401 refracts the light L0 from the light emitting element 30 of the light source 3 at a predetermined solid angle with the center of the light emitting element 30 as the first incident light L1. This is the surface on which light is incident. The first incident light L1 is parallel light that is parallel or substantially parallel to the optical axis Z of the incident part. That is, it is the parallel incident light L1. The first incident surface 401 is provided facing the light emitting element 30 of the light source 3 . The first incident surface 401 is a refracting surface of a hyperboloid of revolution formed by rotating a hyperbola with a focal point at or near the center of the light emitting element 30 about the main axis of the hyperbola (incident portion optical axis Z).

The second incident surface 402 receives the light L0 from the light emitting element 30 of the light source 3 within a predetermined solid angle range with the center of the light emitting element 30 as the point (apex of the angle) as the second incident light L2. This is the surface for refracting and incident light. The second incident surface 402 is a side wall surface on the outer periphery of the first incident surface 401 . The second incident surface 402 is a refracting surface of a rotating surface formed by rotating a straight line or a curved line about the incident portion optical axis Z as a rotating axis. The second incident surface 402 is a refracting surface that is inclined with respect to the incident portion optical axis Z direction by at least the draft angle (not shown) of the molding die (not shown) of the lens member 4 .

The reflecting surface 400 is a surface that totally reflects the second incident light L2 incident from the second incident surface 402 as reflected light L3 parallel or substantially parallel to the optical axis Z of the incident part, that is, parallel incident light L3.

(Description of incident-side reflecting portion 41)
The incident-side reflecting portion 41 is provided on one side (lower piece) of the lens member 4 and on the other surface of the lens member 4 (the surface opposite to the surface facing the mounting surface 20 of the substrate 2). . Four incident-side reflecting portions 41 are provided corresponding to the four incident portions 40 . The four incident-side reflecting portions 41 are aligned in the left-right direction. The four incident-side reflecting portions 41 reflect incident light, that is, parallel incident light L1 and L3 from one side of the lens member 4 to the other side of the lens member 4, respectively.

Each of the four incident-side reflecting portions 41 has a first incident-side reflecting surface 411, a second incident-side reflecting surface 412, and a third incident-side reflecting surface 413, as shown in FIG.

The first incident-side reflecting surface 411 is provided above the optical axis Z of the incident portion. As shown in FIG. 2, the first incident-side reflecting surface 411 is inclined from bottom to top as it goes from front to back. The tilt angle is, in this example, about 45° up with respect to the fore-aft direction (or back with respect to the up-down direction).

The first incident-side reflecting surface 411 converts part of the parallel incident lights L1 and L3 (parallel incident lights L1 and L3 above the incident part optical axis Z) into first incident-side reflected light L4 by total reflection, The light is reflected toward the output-side reflecting portion 42 side.

The second incident-side reflecting surface 412 is provided below the optical axis Z of the incident section. As shown in FIG. 4, the shape of the second incident-side reflecting surface 412 in plan view is a V-shape that is open to the left and right from the front to the rear. The second incident-side reflecting surface 412 consists of two surfaces, left and right. In this example, the inclination angles of the two left and right surfaces of the second incident-side reflecting surface 412 are about 45° left and right with respect to the front-rear direction.

The second incident-side reflecting surface 412 converts the rest of the parallel incident lights L1 and L3 (parallel incident lights L1 and L3 below the optical axis Z of the incident part) into the second incident-side reflected light L5 by total reflection. The light is reflected toward the third incident-side reflecting surface 413 side.

The third incident-side reflecting surface 413 is provided below the optical axis Z of the incident portion. As shown in FIG. 3, the shape of the third incident-side reflecting surface 413 when viewed from the front is a shape that opens left and right from the bottom to the top. The third incident-side reflecting surface 413 consists of two surfaces, left and right. The left and right third incident side reflecting surfaces 413 face the left and right second incident side reflecting surfaces 412 respectively. In this example, the angle of inclination of the left and right surfaces of the third incident-side reflecting surface 413 is about 45° left and right with respect to the vertical direction.

The third incident-side reflecting surface 413 reflects the second incident-side reflected light L5 from the second incident-side reflecting surface 412 toward the output-side reflecting section 42 as third incident-side reflected light L6 by total reflection. .

(Description of the output-side reflecting portion 42)
The exit-side reflecting portion 42 is provided from the middle to the other side (upper side) of one surface of the lens member 4 (the surface facing the mounting surface 20 of the substrate 2). The output-side reflecting section 42 receives the reflected light from the incident-side reflecting section 41, that is, the first incident-side reflected light L4 from the first incident-side reflecting surface 411 and the third incident-side reflected light from the third incident-side reflecting surface 413. The light L6 is reflected to the other surface of the lens member 4 (the surface opposite to the mounting surface 20 of the substrate 2).

The exit-side reflecting portion 42 has an exit-side reflecting surface 420 and a connecting surface 421, as shown in FIGS. The exit-side reflecting surface 420 and the connecting surface 421 are alternately provided in the vertical direction.

The exit-side reflecting surface 420 is inclined from bottom to top as it goes from front to back. The tilt angle is, in this example, about 45° up with respect to the fore-aft direction (or back with respect to the up-down direction). The output-side reflecting surface 420 receives reflected light from the incident-side reflecting section 41 (the first incident-side reflected light L4 from the first incident-side reflecting surface 411 and the third incident-side reflected light L6 from the third incident-side reflecting surface 413). ) is reflected as the reflected light L7 toward the other surface of the lens member 4, that is, toward the exit portion 43 side.

The connecting surface 421 is parallel or substantially parallel to the vertical direction. The connecting surface 421 is arranged between the upper and lower output-side reflecting surfaces 420 and connects the upper and lower output-side reflecting surfaces 420 .

(Description of the emitting portion 43)
The emitting portion 43 is provided from the middle to the other side (upper side) of the other surface of the lens member 4 (the surface opposite to the mounting surface 20 of the substrate 2). The emitting portion 43 emits the reflected light L7 from the emitting-side reflecting portion 42 to the outside as emitted light L8.

The emitting direction of the light L0 from the light emitting element 30 of the light source 3 and the emitting direction of the emitted light L8 from the emitting portion 43 are the same or substantially the same.

The emitting portion 43 forms a light emitting surface 430 . The light emitting surface 430 is an arbitrary designed surface, in this example, a laterally elongated rectangular designed surface indicated by thick solid lines and lattice patterns in FIG. The output portion 43 has an output surface 431 as shown in FIGS. 2, 3 and 6 .

The output surface 431 faces the output side reflecting surface 420 of the output side reflecting section 42 . The output surface 431 forms the light emitting surface 430 by outputting the reflected light L7 from the output side reflecting surface 420 of the output side reflecting portion 42 to the outside as the output light L8. That is, the exit surface 431 and the light emission surface 430 are the same surface.

The exit surface 431 is composed of a group of light diffusing surfaces that diffuse and emit the reflected light L7 from the exit-side reflecting surface 420 to the outside as diffuse emitted light L8. As a result, the emission surface 431 and the group of light diffusing surfaces are the same, so the group of light diffusing surfaces, which is the emission surface 431 , forms the light emitting surface 430 . The exit-side reflective surface 420 and the light diffusion surface group, which is the exit surface 431, face each other. A light-diffusion surface consists of a part of spherical surface in this example.

(Explanation of inner housing 5)
The inner housing 5 is made of a light-impermeable resin member in this example. The inner housing 5 accommodates the lens member 4 . The inner housing 5 blocks uncontrolled light (leakage light) from the lens member 4 from leaking into the lamp chamber 103 or through the lamp lens 102 to the outside.

An opening 50 is provided on one surface of the inner housing 5 (the surface of the lens member 4 facing the incident-side reflecting portion 41 and the emitting portion 43). Four windows 51 are provided on one side of the other surface of the inner housing 5 (the surface facing the incident portion 40 and the exit-side reflecting portion 42 of the lens member 4). are provided corresponding to

(Description of the action of the embodiment)
The vehicle lamp unit 1U and the vehicle lamp device 100 according to this embodiment are configured as described above, and the operation thereof will be described below.

Electric power (current) is also supplied to the light source 3 mounted on the board 2 via electronic control parts mounted on the board 2 to cause the light emitting element 30 to light up and emit light. Then, the light L0 is emitted from the light emitting element 30 of the light source 3 radially forward from behind.

The light L0 from the light source 3 passes through the first incident surface 401, the second incident surface 402 and the reflecting surface 400 of the incident portion 40 of the lens member 4 and enters the lens member 4 as parallel incident lights L1 and L3.

Some of the parallel incident lights L1 and L3 are reflected toward the output side reflecting section 42 by the first incident side reflecting surface 411 of the incident side reflecting section 41 .

The rest of the parallel incident lights L1 and L3 are reflected by the second incident side reflecting surface 412 of the incident side reflecting section 41 toward the third incident side reflecting surface 413 as the second incident side reflected light L5. The second incident-side reflected light L5 is reflected by the third incident-side reflecting surface 413 toward the output-side reflecting section 42 as third incident-side reflected light L6.

The first incident-side reflected light L4 and the third incident-side reflected light L6 are reflected by the output-side reflecting surface 420 of the output-side reflecting section 42 toward the output section 43 as reflected light L7.

The reflected light L7 is emitted from the emission surface 431 of the emission portion 43 to the outside as emitted light L8. The emitted light L8 is diffused and emitted to the outside by the group of light diffusion surfaces of the emission surface 431 . As a result, the exit surface 431 emits light as the light emitting surface 430 . The light emitting surface 430 emits light as a horizontally long rectangular design surface.

(Description of effects of the embodiment)
The vehicle lighting unit 1U and the vehicle lighting device 100 according to this embodiment have the above-described configuration and operation, and the effects thereof will be described below.

In the vehicle lamp unit 1U and the vehicle lamp device 100 according to this embodiment, the emission direction of the light L0 from the light source 3 and the emission direction of the emission light L8 from the emission portion 43 of the lens member 4 are different from the front to the rear. directional, co-directional or nearly co-directional. In addition, the vehicle lamp unit 1U and the vehicle lamp device 100 according to this embodiment are arranged such that the direction of emission of the light L0 from the light source 3 (the front-rear direction) and the mounting surface 20 of the substrate 2 on which the light source 3 is mounted. The direction (up-down direction or left-right direction) is vertical or nearly vertical. For this reason, the vehicle lamp unit 1U and the vehicle lamp device 100 according to this embodiment are configured so that the direction of the mounting surface 20 of the substrate 2 on which the light source 3 is mounted and the emitted light from the emitting portion 43 of the lens member 4 are different. The emission direction of L8 is perpendicular or nearly perpendicular. As a result, the vehicle lamp unit 1U and the vehicle lamp device 100 according to this embodiment can suppress the thickness of the vehicle lamp even if the area of the mounting surface 20 of the substrate 2 is increased, and the thickness can be reduced. Spacing is possible.

In addition, the vehicle lamp unit 1U and the vehicle lamp device 100 according to this embodiment require only one substrate 2 even if the area of the mounting surface 20 is increased, so that the number of parts is not increased and the number of parts is suppressed. Is possible.

As described above, the vehicle lamp unit 1U and the vehicle lamp device 100 according to this embodiment can reduce the number of parts, and can be thin and space-saving.

In the vehicle lighting unit 1U and the vehicle lighting device 100 according to this embodiment, the incident side reflecting section 41 converts part of the parallel incident lights L1 and L3 from the incident section 40 into the first incident side reflected light L4. A first incident-side reflecting surface 411 that reflects toward the output-side reflecting portion 42 side, and a second reflecting surface 411 that reflects the rest of the parallel incident light beams L1 and L3 from the incident portion 40 parallel or substantially parallel to the mounting surface 20 of the substrate 2 . The second incident side reflecting surface 412 and the third incident side reflecting surface that reflects the second incident side reflected light L5 from the second incident side reflecting surface 412 toward the output side reflecting section 42 side as the third incident side reflected light L6. 413 and .

Further, in the vehicle lamp unit 1U and the vehicle lamp device 100 according to this embodiment, the emission side reflection portion 42 is configured to reflect the first incidence side reflected light L4 from the first incidence side reflection surface 411 of the incidence side reflection portion 41 and It has an output side reflecting surface 420 that reflects the third incident side reflected light L6 from the third incident side reflecting surface 413 of the incident side reflecting section 41 toward the output section 43 side as the reflected light L7.

Further, in the vehicle lamp unit 1U and the vehicle lamp device 100 according to this embodiment, the emission section 43 emits the reflected light L7 from the emission side reflection surface 420 of the emission side reflection section 42 to the outside as the emission light L8. It has an output surface 431 forming a light emitting surface.

As a result, the vehicle lighting unit 1U and the vehicle lighting device 100 according to this embodiment transmit the light L0 from the light source 3 through the incident portion 40, the incident side reflecting portion 41, the emitting side reflecting portion 42, and the emitting side reflecting portion 42 of the lens member 4. The portion 43 allows the emitted light L8 to be emitted with high efficiency.

In the vehicle lamp unit 1U and the vehicle lamp device 100 according to this embodiment, the emission surface 431 of the emission portion 43 emits the reflected light L7 from the emission side reflection surface 420 of the emission side reflection portion 42 as diffuse emission light L8 to the outside. The light diffusing surface group, which is the emission surface 431 , forms the light emitting surface 430 .

As a result, in the vehicle lamp unit 1U and the vehicle lamp device 100 according to this embodiment, the diffuse emission light L8 is diffusely emitted from the light emitting surface 430 to the outside, so that the light emitting surface 430 can be visually recognized from multiple directions. The design effect of the light emitting surface 430 is improved.

(Description of Modification 1)
7 and 8 show Modification 1 of the light emitting surface 432. FIG. 7 and 8, the same reference numerals as in FIGS. 1 to 6 denote the same items.

The light emitting surface 430 has a horizontally long rectangular shape. The light-emitting surface 432 according to Modification 1 forms a checkered pattern indicated by thick solid lines and lattice patterns in FIG. The checkered light-emitting surface 432 is formed from a group of light diffusing surfaces, which is the output surface 433 .

The exit-side reflection surface 422 of the exit-side reflection part 42 and the light diffusion surface group, which is the exit surface 433 forming the light-emitting surface 432, face each other. That is, the output-side reflecting surface 422 of the output-side reflecting section 42 forms a checkered pattern corresponding to the checkered pattern of the light emitting surface 432 .

The vehicle lighting unit 1U and the vehicle lighting device 100 having the light emitting surface 432 according to Modification 1 achieve the same effects as the vehicle lighting unit 1U and the vehicle lighting device 100 having the light emitting surface 430 described above. be able to.

In particular, the vehicle lighting unit 1U and the vehicle lighting device 100 having the light emitting surface 432 according to Modification 1 have a light diffusing surface group, which is the output surface 433 forming the light emitting surface 432 in checkered pattern with the output side reflecting surface 422. and are facing each other. As a result, in the vehicle lighting unit 1U and the vehicle lighting device 100 having the light emitting surface 432 according to Modification 1, the reflected light L7 from the emission side reflecting surface 422 is reliably reflected toward the checkered light emitting surface 432 side. be. As a result, the vehicle lighting unit 1U and the vehicle lighting device 100 having the light emitting surface 432 according to Modification 1 can reliably obtain the checkered light emitting surface 432 .

(Description of modification 2)
9 and 10 show Modification 2 of the light emitting surface 434. FIG. 9 and 10, the same reference numerals as in FIGS. 1 to 8 denote the same items.

The light emitting surface 430 has a horizontally long rectangular shape, and the light emitting surface 432 according to Modification 1 has a checkered pattern. The light-emitting surface 434 according to Modification 2 has a horizontal line pattern of four upper and lower lines indicated by thick solid lines and a grid pattern in FIG. The light-emitting surface 434 forming a horizontal line pattern of four upper and lower lines is formed from a group of light diffusing surfaces, which is the emission surface 435 .

The exit-side reflection surface 423 of the exit-side reflection part 42 and the light diffusion surface group, which is the exit surface 435 forming the light-emitting surface 434, face each other. That is, the emission-side reflection surface 423 of the emission-side reflection portion 42 forms a pattern of four vertical lines corresponding to the pattern of four horizontal lines on the light-emitting surface 434 .

The vehicle lighting unit 1U and the vehicle lighting device 100 having the light emitting surface 434 according to Modification 2 are the vehicle lighting unit 1U and the vehicle lighting device 100 having the light emitting surface 430 described above and the vehicle lighting device 100 according to Modification 1. The same effects as those of the vehicle lamp unit 1U having the light emitting surface 432 and the vehicle lamp device 100 can be achieved.

In particular, the vehicle lighting unit 1U and the vehicle lighting device 100 having the light emitting surface 434 according to Modification 2 have the output side reflection surface 423 and the output surface 435 forming the light emitting surface 434 with four horizontal lines on the upper and lower sides. A group of light diffusing surfaces are facing each other. As a result, in the vehicle lamp unit 1U and the vehicle lamp device 100 having the light emitting surface 434 according to Modification 2, the reflected light L7 from the emission-side reflecting surface 423 is reliably reflected on the light emitting surface of four vertical horizontal lines. It is reflected to the 434 side. As a result, the vehicle lighting unit 1U and the vehicle lighting device 100 having the light emitting surface 434 according to Modification 2 can reliably obtain the light emitting surface 434 having four vertical horizontal lines.

(Description of examples other than the embodiment)
In the above-described embodiment, the vehicle lamp device 100 is described as a rear combination lamp. However, in the present invention, the vehicular lighting device 100 can be applied to, for example, a front combination lamp as well as the rear combination lamp.

In the above-described embodiment, the vehicle lamp unit 1U is used as a tail lamp, a stop lamp, or a tail/stop lamp. However, in the present invention, the vehicle lamp unit 1U may be used as a tail lamp, a stop lamp, or a turn signal lamp, a backup lamp, a decorative lamp, etc. other than the tail/stop lamp. It may also be used for day running lamps, clearance lamps, turn signal lamps, etc. of front combination lamps.

Furthermore, in the above-described embodiment, the light L0 from the light emitting element 30 of the light source 3 is incident on the incident portion 40 as parallel incident light beams L1 and L3 parallel or substantially parallel to the optical axis Z of the incident portion. be. However, in this invention, part of the light L0 from the light emitting element 30 of the light source 3 may be incident on the incident portion 40 as parallel incident light L3, or all of the incident portion optical axis It may be incident as incident light parallel or not substantially parallel to Z.

In addition, this invention is not limited by the said embodiment. For example, the shape of the substrate 2, the number of light sources 3, the reflecting surface 400, the first incident surface 401, the second incident surface 402, the first incident side reflecting surface 411, the second incident side reflecting surface 412, the second 3 The shapes of the entrance-side reflecting surface 413, the exit-side reflecting surfaces 420, 422, 423, the light-emitting surfaces 430, 432, 434, and the exit surfaces 431, 433, 435 are not limited.

1U vehicle lamp unit 2 substrate 20 mounting surface 3 light source 30 light emitting element 4 lens member 40 incident part 400 reflecting surface 401 first incident surface 402 second incident surface 41 incident side reflecting part 411 first incident side reflecting surface 412 second incident Side reflecting surface 413 Third incident side reflecting surface 42 Output side reflecting portion 420 Output side reflecting surface 421 Connection surface 422 Output side reflecting surface 423 Output side reflecting surface 43 Output portion 430 Light emitting surface 431 Output surface 432 Light emitting surface 433 Output surface 434 Light emission Surface 435 Output surface 5 Inner housing 50 Opening 51 Window 100 Vehicle lighting device 101 Lamp housing 102 Lamp lens 103 Lamp chamber B Rear D Bottom F Front L Left L0 Light (light from light source)
L1 first incident light (parallel incident light)
L2 Second incident light L3 Reflected light (parallel incident light)
L4 First incident side reflected light L5 Second incident side reflected light L6 Third incident side reflected light L7 Reflected light L8 Output light (diffuse output light)
R Right U Top Z Entrance optical axis

Claims (5)

a substrate having a mounting surface;
a light source mounted on one side of the mounting surface for emitting light perpendicularly or substantially perpendicularly to the surface direction of the mounting surface;
a lens member arranged to face the mounting surface;
with
The lens member is
an incident portion provided on one side facing the light source and for allowing the light from the light source to enter as incident light;
an incident-side reflecting portion provided on one side for reflecting the incident light from one side to the other side;
an output-side reflector provided from a middle side facing the mounting surface to the other side for reflecting light reflected from the incident-side reflector to the side opposite to the mounting surface;
provided from the middle of the opposite side to the other side with respect to the mounting surface, and the reflected light from the output-side reflecting portion is emitted to the outside in the same direction as or substantially the same direction as the light emitted from the light source. an emission part that emits light in the same direction to form a light emitting surface of an arbitrary design surface;
having
A vehicle lamp unit characterized by: The incident part has an incident part optical axis that is perpendicular or substantially perpendicular to the mounting surface, and converts at least part of the light from the light source into parallel incident light that is parallel or almost parallel to the incident part optical axis. is incident as
The incident-side reflecting section is
a first incident-side reflecting surface that reflects part of the parallel incident light toward the output-side reflecting section;
a second incident-side reflecting surface that reflects the remainder of the parallel incident light parallel or substantially parallel to the mounting surface;
a third incident-side reflecting surface that reflects light reflected from the second incident-side reflecting surface toward the output-side reflecting portion;
has
The output-side reflecting section has an output-side reflecting surface that reflects reflected light from the first incident-side reflecting surface and reflected light from the third incident-side reflecting surface to the output section side,
The emitting part has an emitting surface that emits reflected light from the emitting-side reflecting surface to the outside as the emitting light to form the emitting surface,
The vehicle lamp unit according to claim 1, characterized in that: At least a part of the exit surface is composed of a group of light diffusing surfaces for diffusing the reflected light from the exit-side reflecting surface to the outside as diffused exit light,
the light diffusing surface population forms the light emitting surface;
3. The vehicle lamp unit according to claim 2, wherein: the exit-side reflecting surface and the group of light diffusing surfaces face each other;
4. The vehicle lamp unit according to claim 3, wherein: a lamp lens and a lamp housing forming a lamp chamber;
a vehicle lamp unit according to any one of claims 1 to 4, which is arranged in the lamp chamber;
comprising
A vehicle lamp device characterized by:

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