WO2023189905A1

WO2023189905A1 - Vehicle lamp

Info

Publication number: WO2023189905A1
Application number: PCT/JP2023/011130
Authority: WO
Inventors: 憲一本村; 梢太花見
Original assignee: 株式会社小糸製作所
Priority date: 2022-03-31
Filing date: 2023-03-22
Publication date: 2023-10-05
Also published as: JP2023151430A

Abstract

Provided is a vehicle lamp that exhibits excellent visibility during lighting and non-lighting. This vehicle lamp comprises a lamp space S formed by a lamp body 10 and an outer lens 20. The lamp space S has disposed therein a light source 42 and an inner lens 30 that is a light guide member including a light diffusion material R and emits light as a result of light-guiding of light source light having entered the end edge of the light guide member. The inner lens 30 is layered on the outer lens 20 which has a long narrow shape. A light entry part 32b for receiving entry of light source light is formed at at least one of the short-direction end edges 31b, 31c of the inner lens 30 facing the rear side in the lamp space S. The light of the light source 42, having entered the light entry part 32b and having been guided in the lens 30, is diffused and reflected by the light diffusion material R, and the resulting light is emitted from the entire area, of the inner lens 30, layered on the outer lens 20.

Description

Vehicle lights

The present invention relates to a vehicle lamp.

Conventional vehicle lighting equipment includes an inner lens consisting of a light guide with a reflective step on the back inside the lamp chamber formed by a lamp body and a transparent outer lens. There is a lamp that emits light by transmitting it through an outer lens (for example, Patent Document 1).

Furthermore, instead of an inner lens provided with a reflection step, there is a lamp in which the inner lens is configured with a light guide containing a light diffusing material, and the light emitted from the inner lens is transmitted through the outer lens to emit light (for example, Patent Document 2 ).

Unexamined Japanese Patent Publication No. 2016-12460 JP2017-147145A (Patent No. 6704263)

However, in Patent Document 1, when the lamp is not lit, the reflective step of the inner lens can be seen through the outer lens in white, so the appearance (visibility) is poor when the lamp is not lit.

Furthermore, in both of the lamps disclosed in Patent Documents 1 and 2, when the lamp is turned on, the outer lens itself does not emit light, but the light emitted from the inner lens inside the outer lens is visible through the outer lens, so the outer lens itself Compared to lamps that emit light, the appearance (visibility) is poor.

Furthermore, since the light source is arranged so that the light source light enters the edge of the inner lens, which is arranged parallel to the outer lens, when the lamp is turned on, the area of the outer lens that is not laminated with the inner lens (light source placement area) does not emit light, and the light emitting area of the outer lens is small, resulting in poor appearance (visibility).

The present invention was proposed in order to solve the above-mentioned problems, and its purpose is to provide a vehicle lamp with excellent appearance (visibility) when lit and when not lit. .

In order to solve the above problems, a vehicle lamp according to an aspect of the present invention has the following features:
A lamp chamber is formed by sealing the peripheral edge of a translucent outer lens to the opening peripheral edge of a container-shaped lamp body. A vehicle lamp in which a translucent inner lens is disposed that emits light by guiding the light from the light source that enters a light entrance portion formed at an edge,
The inner lens is laminated on at least a portion of the outer lens, which has a narrow and elongated shape when viewed from the front, and has a structure in which light from the light source enters at least one of the edges in the short direction of the inner lens facing the rear of the lamp chamber. A light part is formed,
It is characterized in that the light from the light source that has entered the light input portion is guided within the lens and is diffusely reflected by the light diffusing material and exits from the outer lens as diffused light.

(Function) In this aspect, when the lamp is turned on, the light from the light source that enters the light input section is diffusely reflected by the light diffusing material contained in the inner lens, and the outer lens is laminated on the inner lens. The outer lens itself emits light by emitting diffused light from its surface. Therefore, the light emission of the inner lens is not visible through the outer lens, but the light emission of the outer lens itself laminated to the inner lens is visible, so that the visibility of the lamp when lit is improved.

In particular, since the outer lens (inner lens) is formed into an elongated shape with a narrow width in front view, the light source light incident on the light entrance part formed at one end edge in the short direction of the inner lens is guided inside the lens. The light is easily guided to the other end edge of the inner lens in the short direction, and the outer lens emits light to the opposite side in the short direction from the light entrance portion forming side of the inner lens.

When the light is turned on, the light emitted from the inner lens is not visible through the outer lens, but the light emitted from the entire area where the inner lenses of the outer lens are laminated can be seen directly, and the light (outer lens) is arranged horizontally (in the horizontal direction) relative to the vehicle body. In this case, the upper part of the front surface, which is the designed surface of the outer lens, which is easily visible to drivers and pedestrians, emits light particularly brightly, so the lamp has excellent visibility when turned on, especially at a distance. For this reason, in a configuration in which the lamp (outer lens) is arranged horizontally (in the left-right direction) with respect to the vehicle body, even if the inner lens is laminated only in the area corresponding to the upper part of the front surface, which is the design surface of the outer lens, it will not turn on. The visibility of the lamp will not deteriorate at any time.

In addition, even if you do not actively provide a reflective step on the inner lens, the outer lens itself emits light when the lamp is on, so when the lamp is off, the reflective step on the inner lens looks white and cloudy through the outer lens. The sense of depth in the light chamber is ensured through the outer lens, and the visibility of the light fixture when not lit is also excellent.

Furthermore, the outer lens and the inner lens, which are laminated together, are configured as one member that is in close contact with each other at the interface, thereby reducing the number of component parts of the lamp.

Furthermore, in the above aspect,
A region of the outer lens where the inner lens is laminated is formed into a shape that is bent or curved and bulges forward,
It is also preferable that a light entrance portion for the light source light is formed also at the other end edge in the short direction of the inner lens.

(Function) In general, the further away from the light incident part forming side of the inner lens, the weaker the strength of the light guided within the inner lens, which is diffused and reflected by the light diffusing material within the inner lens and exits from the front surface of the outer lens. The amount of light (the amount of light emitted from the outer lens) decreases. In particular, if the outer lens (inner lens) has a bent or curved area, the light source entering the light input area may be affected by the long light guide path within the inner lens or by light leakage at the bent or curved area. The light is not sufficiently guided to the tip side of the light guide path in the lens, and the amount of light emitted by the outer lens corresponding to the side where the light entrance part of the inner lens is formed is lower than that of the outer lens corresponding to the side where the light entrance part of the inner lens is formed. The amount of light emitted by the lens is poor.

However, in this aspect, since the light source light also enters the light entrance part (second light entrance part) formed at the other end edge of the inner lens in the short direction, The intensity of light guiding on the edge side increases, and the amount of light emitted by the outer lens corresponding to the other edge side in the short direction of the inner lens is ensured. That is, the entire outer lens, which is bent or curved and bulges forward, emits light uniformly.

Furthermore, in the above aspect,
A region of the outer lens where the inner lens is laminated is formed into a shape that is bent or curved and bulges forward,
a first light source is disposed above the lamp chamber, and a second light source is disposed below the lamp chamber,
forming a first light incident part through which the first light source light enters at one end edge of the inner lens in the short direction;
It is also preferable to form a second light entrance portion into which the second light source light enters, at the other edge of the inner lens in the short direction.

(Function) In this aspect, a first light source and a second light source are provided in the lamp chamber, and the first light source entering the first light incident portion formed at one end edge in the short direction of the inner lens. The outer lens emits light when the light source light is guided, and the outer lens also emits light when the second light source light that enters the second light incident part is formed at the other edge of the inner lens in the short direction. Therefore, the amount of light emitted by the outer lens is correspondingly large.

Furthermore, in the above aspect,
It is also preferable that a second light guide member for guiding the light from the light source to the light input portion is disposed within the lamp chamber.

(Function) The light source is, for example, a structure in which light emitting elements such as light emitting diodes (LEDs) are mounted and integrated in a line at equal intervals on a light source board, and the light emitted from the light emitting elements is directional. The light source light (light from a plurality of light emitting elements) that directly enters the light entrance portion of the inner lens and the respective light guides within the inner lens are also affected by the directivity, and there is a risk that uneven light emission may occur in the outer lens.

However, in this aspect, the directional light source light (light emitted from each of the plurality of light emitting elements) is guided through the second light guide member, so that the directional influence is alleviated, and the light is emitted from the inner light source. Since the light enters the light incident part of the lens, the directivity of the light emitting element does not become apparent in the light guided within the inner lens, and uneven light emission does not occur on the outer lens.

Also, considering the incidence efficiency of the light source light to the light entrance part of the inner lens, it is desirable to arrange the light source so that it directly faces the light entrance part of the inner lens. Even if the light source light is not directly opposed to the inner lens, by using the second light guiding member, the light source light can be made to enter the light incident part of the inner lens as a directly facing light source light.

For example, a part of the light source light (downward light emission) is transmitted between the light source, which is placed facing downward in the upper part of the lamp chamber, and the light entrance part formed at one edge in the short direction of the inner lens. By arranging the second light guide member that allows the light to enter the light input section, the light source light can be made to enter the light input section of the inner lens as directly facing light source light, even if the light source is not placed so as to directly face the light input section. can. That is, the degree of freedom in the posture (orientation) and position of the light source placed in the lamp room increases.

Furthermore, in the above aspect,
the light source is disposed upward in the lamp chamber facing downward;
A region of the outer lens where the inner lens is laminated is formed into a shape that is bent or curved and bulges forward,
forming a light entrance portion for the light source light at each edge in the short direction of the inner lens facing the rear of the lamp chamber;
A part of the light source light is transmitted between the light source and one edge of the inner lens in the short direction into the light input section (first light input section) formed at one edge of the inner lens. arranging a second light guide member to guide the light;
Below the light source in the lamp chamber, there is a reflector that guides a part of the light source light to the light input section (second light input section) formed on the other edge of the inner lens and the entire back surface of the inner lens. Place the
If necessary, it is also preferable to arrange a second inner lens in front of the reflector to diffuse the light reflected by the reflector and directed toward the entire back surface of the inner lens.

(Function) In this aspect, with only the light source disposed above the lamp chamber, the light source light incident on the first and second light entrances is guided in the inner lens and diffusely reflected by the light diffusing material on the outer lens. The light emitted from the light source and the light emitted from the outer lens when the reflected light (left and right diffused light) of the light source light from the reflector is transmitted through the inner lens and the outer lens overlap, and the entire outer lens emits light uniformly and brightly.

According to the present invention, when the light is on, the area of the outer lens where the inner lens is laminated emits light, and a predetermined area of the outer lens that is particularly easily visible to drivers and pedestrians emits bright light, and when the light is off, the outer lens Since a sense of depth is created in the lamp chamber through the lens, the visibility of the lamp is improved both when it is lit and when it is not lit.

In addition, since the outer lens and the inner lens are constructed as a single component, the number of component parts of the lamp is small, and the lamp structure is simplified.

1 is a front view of a vehicle lamp according to a first embodiment of the present invention. FIG. 2 is a longitudinal cross-sectional view of the lamp (a cross-sectional view taken along line II-II in FIG. 1). FIG. 3 is an exploded perspective view of the lamp. FIG. 3 is an enlarged perspective view showing the shape of a reflective surface of a reflector. FIG. 3 is a front view of a vehicle lamp according to a second embodiment of the present invention. FIG. 6 is a longitudinal cross-sectional view of the lamp (a cross-sectional view taken along line VI-VI in FIG. 5).

Hereinafter, the present invention will be explained based on preferred embodiments with reference to the drawings. Identical or equivalent components, members, and processes shown in each drawing are designated by the same reference numerals, and redundant explanations will be omitted as appropriate. Further, the embodiments are illustrative rather than limiting the invention, and all features and combinations thereof described in the embodiments are not necessarily essential to the invention.

1 to 4 show a vehicle lamp 100 according to a first embodiment of the present invention, FIG. 1 is a front view of the lamp 100, and FIG. 2 is a longitudinal cross-sectional view of the lamp 100 (Fig. 3 is an exploded perspective view of the lamp 100, and FIG. 4 is an enlarged perspective view showing the shape of the reflective surface 51 of the reflector 50 disposed in the lamp chamber S. .

The lamp 100 is, for example, a tail and stop lamp attached to the rear of a vehicle, and as shown in FIG. 1, it is formed into an elongated shape that is elongated from side to side when viewed from the front, and whose vertical dimensions are smaller than its horizontal dimensions. There is. The lamp 100 is fixed to a recess formed in the rear panel 102 using fixing means 104 such as fastening screws and nuts (see FIG. 2). Note that in FIG. 1, the vicinity of the substantially central portion in the left-right direction of the lamp 100 is omitted.

As shown in FIGS. 2 and 3, the lamp 100 includes an outer lens 20 at the opening periphery of a rectangular container-shaped lamp body 10 which is elongated from side to side and which opens at the front, and an outer lens 20 which is formed from a rectangular container-like form which is elongated from side to side and opens to the rear. is installed, thereby forming a horizontally long lamp chamber S that is rectangular in front view.

The outer lens 20 is formed into an elongated shape with a narrow width when viewed from the front, and a flange portion 22 on which a seal leg 24 extending rearward is formed is formed at the peripheral edge of the outer lens 20 . A flange portion 12 corresponding to the seal leg 24 of the outer lens 20 is formed at the portion. The seal leg 24 of the outer lens 20 is welded to the flange portion 12 of the lamp body 10, thereby sealing the mounting portion between the outer lens 20 and the lamp body 10.

In addition, the outer lens 20 has side walls 20b to 20e on the upper, lower, left and right sides bent at a substantially right angle with respect to the front wall 20a, and

side walls

20b, 20c, 20d, and 20e on the upper, lower, left and right sides adjacent to the circumferential direction are also bent at a substantially right angle. A design surface 21 (see FIG. 2) that bulges out in a horizontally long rectangular shape is formed in front of the flange portion 22.

An inner lens 30 is laminated inside the front bulging region of the outer lens 20 forming the design surface 21, and the inner lens 30 also follows the shape of the outer lens 20 (the design surface 21 thereof). It is formed into an elongated shape with a narrow visual width.

Specifically, the outer lens 20 is made of a red translucent acrylic resin, while the inner lens 30 is made of a clear translucent polycarbonate resin containing titanium dioxide particles R as a light diffusing material. . The outer lens 20 and the inner lens 30 are configured as a single piece integrated by injection molding, for example. Note that both

lenses

20 and 30 may be integrated by adhesive.

The light diffusing material R contained in the inner lens 30 is, for example, titanium dioxide particles with an average particle diameter of 170 to 450 nm, and the content of the light diffusing material R is, for example, 0.1 to 100 ppm by mass, with a plate thickness of 4 mm. The visible light transmittance in the normal direction (thickness direction) of at least a portion of the surface side of the inner lens 30 (the side in close contact with the outer lens 20) is, for example, 60% or more and 92% or less.

Furthermore, the haze value in the normal direction (thickness direction) of at least a portion of the surface side (the side in close contact with the outer lens 20) of the inner lens 30 having a plate thickness of 4 mm is, for example, 1.1 or more and 50% or less.

In the inner lens 30, the light source light that enters the lens 30 through the

light entrance portions

32b and 32c formed on the

edge portions

31b and 31c, which will be described later, is diffusely reflected by the diffusing material R, and this diffusely reflected light is is emitted from the surface side of the inner lens 30 (the side in close contact with the outer lens 20), and the inner lens 30 itself has high translucency.

Furthermore, since the refractive index of acrylic resin is smaller than that of polycarbonate resin, among the light guided within the inner lens 20, the light that enters the outer lens 20 at a relatively small angle of incidence is transmitted to the interface between the

lenses

30 and 20. Totally reflected. Therefore, the amount of light that enters the outer lens 20 from the inner lens 30 is small, and therefore, most of the light source light that enters the

light entrance portions

32b and 32c (described later) of the inner lens 30 is guided inside the inner lens 30. Since the light is diffusely reflected by the light diffusing material R dispersed within the inner lens 30, the amount of light emitted as diffused light from the designed surface 21 of the outer lens 20 increases accordingly, and the amount of light emitted from the outer lens 20 increases.

Further, as shown in FIG. 2, the inner lens 30 is laminated and formed inside the front wall 20a of the outer lens 20 and the upper, lower, left, and right side walls 20b to 20e. , an end edge 31 (see FIG. 1) of the inner lens 30 extending in a thin string-like manner in the inner circumferential direction along the inner circumferential surface of the side walls 20b to 20e of the outer lens 20 is exposed to the rear inside the lamp chamber S. are doing.

When viewed from inside the lamp chamber S, the end edge portion 31 of the inner lens 30 extends endlessly in the inner circumferential direction of the side walls 20b to 20e of the outer lens 20. First and

second edge portions

31b and 31c in the short direction (vertical direction in FIG. 1) of the inner lens 30, which are regions extending parallel to the direction of

Light entrance portions

32b and 32c (areas indicated by diagonal lines in FIG. 1) are formed.

On the other hand, in the upper part of the light chamber S, a light source board 40 on which a light emitting element 42 such as a light emitting diode (LED) serving as a light source is mounted is arranged with the light emitting element mounting surface (light emitting surface) facing downward. . The light source substrate 40 is formed in a horizontally long rectangular shape with a length that approximately matches the horizontal width of the design surface 21 of the outer lens 20, and a large number of light emitting elements 42 that emit white light are arranged at equal intervals in the longitudinal direction on the substrate 40. has been done.

Further, between the light emitting element 42 mounted on the light source board 40 in the upper part of the lamp chamber S and the first light entrance part 32b formed on the first edge part 31b of the inner lens 30, the light emitting element 42 A light guiding member 60 is arranged to guide part La of the emitted light (outgoing light) to the first light incident part 32b of the inner lens 30.

The light guide member 60 is formed into a plate shape with a rectangular cross section and has a light exit surface 60b that matches the area of the first light entrance part 32b formed at the end edge 31b of the inner lens 30. On the rear end side, there is an inclined entrance surface 60a that directly faces the light emitting element 42 and on which part of the light emitted from the light emitting element 42 La enters, and on the front end side of the light guiding member 60, there is a first light entrance surface 60a of the inner lens 30. A light emitting surface 60b is formed to directly face each portion 32b. A cylindrical step 61 (see FIG. 3) that diffuses the emitted light in the left-right direction is formed on the light emitting surface 60b.

Further, at the rear of the lamp chamber S and directly below the light source board 40, there is a reflecting surface 51 having a size that substantially matches the size of the inner lens 30, which reflects the downward light emitted from the light emitting element 42 toward the front. A reflector 50 is arranged.

As shown in FIG. 4, the reflective surface 51 of the reflector 50 includes cylindrical step elements 51s that are vertically rectangular when viewed from the front and are arranged at equal intervals in the left and right direction, and have a concave arc shape in the vertical section and a convex arc shape in the horizontal section. In this structure, the distance d between adjacent

light emitting elements

42, 42, the width d of each step element 51s forming the reflective surface 51 of the reflector 50, and the pitch d of the left and right arrangement of the step elements 51s are the same. For example, one light emitting element 42 is arranged to correspond to one step element 51s.

As a result, the downward light emitted from the light emitting element 42 disposed above inside the light chamber S is reflected by the reflective surface 51 of the reflector 50 and becomes light Lb that is parallel to the vertical direction and diffused in the left and right direction, and is converted into light Lb that is parallel to the vertical direction and is diffused in the left and right direction. Head inside S and forward.

In addition, in front of the reflector 50 in the lamp chamber S, a second inner lens 70 having a grain or a micro-diffusion step formed on its front side is arranged.

Most of the left and right diffused light reflected by the reflector 50 passes through the second inner lens 70 and becomes light Lb that is further diffused in the vertical and horizontal directions, and enters the entire back side of the inner lens 30. On the other hand, the left and right diffused light Lc reflected near the front edge of the reflector 50 enters the second light incident part 32c formed at the second end edge 31c of the inner lens 30 in the short direction.

The light source board 40, the light guide member 60, the reflector 50, and the second inner lens 70 are integrated into a bracket (not shown) as a light source/reflector unit U, so that they are held in mutually positioned positions. , is arranged at a predetermined position in the lamp chamber S by being fixed to the lamp body 10 by a fixing means (not shown).

Reference numeral 26 in FIG. 2 is a light shielding member assembled on the back side of the flange portion 22 of the outer lens 20 in order to prevent light leakage from the lamp chamber S. Note that instead of the light shielding member 26, a light shielding coating may be applied.

Furthermore, a colored layer 90 made of black polycarbonate resin is laminated on the surface side of the flange portion 22, so that when the lamp is turned on, light emission from the flange portion 22 due to the light guided within the outer lens 20 is suppressed, and when the lamp is not lit. Sometimes, the seal leg 24 is not visible and the boundary between the design surface 21 of the outer lens 20 and the rear panel 102 constituting the vehicle body can be clearly recognized. Therefore, the red translucent outer lens 30, the clear inner lens 20, and the colored layer 90 are integrated by, for example, three-color molding.

Furthermore, the lamp 100 functions as a tail-and-stop lamp by controlling the amount of power supplied to the light emitting element 42 so that the brightness of the light emitted from the outer lens 20 changes. That is, when the amount of power supplied to the light emitting element 42 is small, the outer lens 20 functions as a tail lamp that emits light weakly and uniformly, and when the amount of power supplied to the light emitting element 42 is large, the outer lens 20 functions as a stop lamp that emits strong and bright light. Function.

Hereinafter, the functions and effects of the vehicle lamp 100 according to the first embodiment will be explained.

A part of the light emitted from the light emitting element 42, which is disposed facing downward in the upper part of the lamp chamber S, is transmitted through the light guide member 60 to the first input formed on the first end edge 31b of the inner lens 30 in the short direction. The light entering the light section 32b and guided inside the inner lens 30 is diffusely reflected by the light diffusing material R dispersed within the lens 30, and is emitted as diffused light from the surface of the outer lens 20 laminated on the inner lens 30. The outer lens 20 emits light.

Further, a part of the light emitted from the light emitting element 42 is reflected by the reflector 50 and enters the second light incident part 32c formed at the second end edge 31c of the inner lens 30 in the short direction, and enters the second light incident part 32c of the inner lens 30. The light guided within the lens 30 is diffusely reflected by the light diffusing material R dispersed within the lens 30, and is emitted as diffused light from the surface of the outer lens 20 laminated on the inner lens 30, so that the outer lens 20 emits light.

Further, a part (most) of the light emitted from the light emitting elements 42 of the light source board 40 is reflected by the reflector 50, transmitted through the second inner lens 70, and further transmitted through the inner lens 30 and the outer lens 20 before being emitted. Then, the outer lens 20 emits light.

This will be explained in detail below. A part of the light emitted from the light emitting element 42 that enters the first light incident part 32b is guided from the upper wall 30b of the inner lens 30 to the front wall 30a and the lower wall 30c, but there is a bent part in the middle of the light guide path. At the same time, the strength of the light guide becomes weaker in the front wall 30a and the lower wall 30c where the light guide path from the light entrance part 32b becomes longer.

A part of the light emitted from the light emitting element 42 that has entered the second light incident part 32b is guided from the lower wall 30c of the inner lens 30 to the front wall 30a and the upper wall 30b, but there is a bent part in the middle. In the front wall 30a and the top wall 30b, where the light guide path from the light entrance part 32c becomes longer, the strength of the light guide becomes weaker.

Similarly, regarding the left and right side walls 30d and 30e of the inner lens 30, a portion of the light emitted from the light emitting element 42 that has entered the first light entrance portion 32b and the second light entrance portion 32c, respectively, is transmitted from the top wall 30b to the left and right side walls 30d and 30e. The light is guided from the bottom wall 30c to the left and right side walls 30d, 30e, respectively, but since there is a bend in the middle of each light guide path, the strength of the guided light is each becomes weaker. Note that illustration of the right side wall 30e of the inner lens 30 is omitted.

Therefore, compared to the intensity of light emitted from the upper wall 20b and lower wall 20c of the outer lens 20, the light source light incident on the first light entrance section 32b and the second light entrance section 32c is not enough to reach the front wall 20a or the left and right sides. The intensity of light emitted from the

side walls

20d and 20e is somewhat weak.

However, in the lamp 100, most of the downward light emitted from the light emitting element 42 disposed in the upper part of the lamp chamber S is reflected by the reflective surface 51 of the reflector 50 and becomes left and right diffused light. By transmitting the light, the light becomes diffused in the vertical and horizontal directions, and is guided to the entire inside of the inner lens 30, including the left and right side walls 30d and 30e of the inner lens 30, and is directed to the front wall 20a of the outer lens 20 and the left and right side walls 20d. , 20e.

That is, in the lamp 100, light emission from the outer lens 20 (first light emission), and light emission (second light emission) of the outer lens 20 due to light guide of the light source light that has entered the second light incident portion 32b formed on the second edge portion 31c of the inner lens 30 within the lens 30. Then, most of the light source light is reflected by the reflector 50 and further transmitted through the second inner lens 70 to become vertically and horizontally diffused light, and the outer lens 20 emits light by transmitting this vertically and horizontally diffused light through the inner lens 30 and the outer lens 20. (Third light emission) is polymerized, so that the entire designed surface 21 of the outer lens 20 emits light uniformly and brightly.

Additionally, the vehicle lamp 100 also provides the following actions and effects.

A part of the light emitted from the light emitting element 42 is guided to the first light entrance portion 32b of the inner lens 30 via the light guide member 60, thereby suppressing the occurrence of uneven light emission in the outer lens 20.

That is, it is not possible to make a part of the light emitted from the light emitting element 42 directly enter the first light incident part 32b formed at the first edge part 31b of the inner lens 30 without intervening the light guide member 60. However, since the light emitted from the light emitting element 42 is directional, the light source light (light from the plurality of light emitting elements 42) that directly enters the light entrance part 32b of the inner lens 30 and the respective light guides inside the inner lens 30 The outer lens 30 may also be affected by the directivity, and uneven light emission may occur in the outer lens 30.

However, in the lamp 100, the directional light source light (light emitted from each of the plurality of light emitting elements 42) is guided through the light guide member 60, so that the influence of the directivity is alleviated, and the light is transmitted through the inner lens. 30, the directivity of the light emitting element 42 does not become apparent in the light guide of the light source light (light emitted from each of the plurality of light emitting elements 42) within the inner lens 30, and the light emitted from the light emitting element 42 enters the outer lens 20. No uneven lighting occurs.

Moreover, since the inner lens 30 is not provided with any reflective step elements, the sense of depth of the lamp chamber S becomes apparent through the design surface 21 of the outer lens 20 when the lamp is not lit, resulting in a good appearance.

In addition, when making only a part of the outer lens 20 emit strong light, or when ensuring a predetermined intensity of light distribution on the side of the vehicle (for visibility angle), a reflective step is formed at a predetermined position of the inner lens 30. However, since the reflective step formation range is small, there is no problem that the reflective step looks white when the lamp is not lit, and the sense of depth of the lamp room S is not obstructed.

Further, in the embodiment described above, the lamp 100 is described as a tail-and-stop lamp, but the lamp 100 controls the on/off of power supply to the light emitting elements 42 arranged at equal pitches in the left and right direction for each light emitting element 42. Firstly, it can be used as a sequential lamp in which the blinking area of the outer lens 20 moves in the left and right direction when turned on. Second, it can also be used as a so-called "hospitality lamp" that is turned on when a user such as a driver or passenger of a car approaches his or her parked vehicle or when getting on or off the vehicle.

Furthermore, in the light fixture 100, if the outer lens 20 is made of clear resin, it can be used as a side marker lamp or a daytime running lamp, and if the outer lens 20 is made of amber-colored resin, it can be used as a turn signal lamp. Available.

Furthermore, even if the light emitting element 42 that emits light in amber color is used and the outer lens 20 is made of clear resin, it can be used as a turn signal lamp.

5 and 6 show a vehicle lamp 100A according to a second embodiment of the present invention, FIG. 5 is a front view of the lamp 100A, and FIG. 6 is a longitudinal cross-sectional view of the lamp 100A (FIG. 5). (A cross-sectional view taken along line VI-VI). Note that in FIG. 5, the vicinity of the substantially central portion in the left-right direction of the lamp 100A is omitted.

In the lamp 100 according to the first embodiment described above, the front bulging region of the outer lens 20 that forms the design surface 21 (the region in which the inner lens 30 is laminated) has a small radius of curvature (a region with a small radius of curvature). Since the bent portion (large) is formed, if only a portion of the light emitted from the light emitting element 42 enters the

light incident portions

32b and 32c formed at the

short edge portions

31b and 31c of the inner lens 30, The amount of light guided at the front wall 30a and left and right side walls 30d and 30e of the inner lens 30 is small, and the amount of light emitted at the front wall 20a and left and

right side walls

20d and 20e of the outer lens 20 is small. Therefore, in the lamp 100, a reflector 50 is disposed in the lamp chamber S to guide most of the light emitted from the light emitting element 42 as diffused light to the entire back surface of the inner lens 30. Efforts have been made to increase the amount of light emitted from the

walls

20d and 20e.

On the other hand, the lamp 100A according to the second embodiment also includes titanium dioxide particles R, which are light diffusing materials, in the outer lens 20A, which is made of a red translucent acrylic resin and has a narrow and elongated shape when viewed from the front. The lamp 100 is characterized in that the inner lens 30A made of clear translucent polycarbonate resin is laminated, and the inner lens 30A is also formed into a narrow and elongated shape in front view that follows the front view shape of the outer lens 20A. have in common.

Furthermore, the visible light transmittance in the normal direction (thickness direction) and the haze value in the normal direction (thickness direction) of the inner lens 30A are the same as the visible light transmittance of the inner lens 30A used in the first embodiment. This is the same as the transmittance and haze value, and a duplicate explanation thereof will be omitted.

However, in the lamp 100A, the entire front bulging region of the outer lens 20A forming the design surface 21A (the front wall 20Aa of the outer lens on which the inner lens 30A is laminated) is a smooth convex curved surface with a relatively small curvature. It is formed of. Therefore, the interface between the outer lens 20A and the inner lens 30A and the back surface of the inner lens 30A are also formed of smooth convex curved surfaces with relatively small curvature.

As a result, as will be described in detail later, the edges 31Ab and 31Ac in the short direction of the inner lens 30A laminated on the outer lens 20A face rearward in the lamp chamber SA; The light source light that has entered the light entrance portions 32Ab and 32Ac formed in the inner lens 31Ac is characterized in that the light can be guided smoothly through the inner lens 30A without leaking light.

Specifically, like the lamp 100 of the first embodiment, the lamp 100A is, for example, a tail-and-stop lamp attached to the rear of the vehicle, and is formed in an elongated shape from side to side when viewed from the front.

In the lamp 100A, the periphery of a container-shaped outer lens 20A that is open to the rear and long to the left and right is attached to the opening periphery of the container-shaped lamp body 10A that is open to the front and is long to the left and right. A horizontally long lamp chamber SA is formed with arcuate sides.

That is, in the lamp 100A, the left and right side walls of the lamp body 10A and the left and right sides of the front wall 20Aa of the outer lens 20A are each formed into an arc shape when viewed from the front, and are formed in a region in front of the flange portion 22 of the outer lens 20A. As described above, the design surface 21A is formed of a convex curved surface with a small curvature that is largely curved forward.

Further, as shown in FIG. 6, the inner lens 30A is laminated inside the curved front wall 20Aa of the outer lens 20A, so that the front wall of the outer lens 20A is formed inside the flange portion 22 of the outer lens 20A. An edge portion 31A of the inner lens 30A, which extends endlessly in the inner circumferential direction along the inner circumferential surface of the inner lens 20Aa in a thin string shape, is exposed to the rear inside the lamp chamber SA.

When viewed from inside the lamp chamber SA, the end edge 31A of the inner lens 30A extends endlessly in the inner circumferential direction of the front wall 20Aa of the outer lens 20A. First and second incident light for the light source light is applied to the first and second edge portions 31Ab and 31Ac in the short direction (vertical direction in FIG. 5) of the inner lens 30A, which are areas extending in parallel. Portions 32Ab and 32Ac (shaded areas in FIG. 5) are formed.

Furthermore, the edge portion 31A of the inner lens 30A facing the rear inside the lamp chamber SA is formed at a position P2 offset rearward within the lamp chamber SA by d1 from the position P1 corresponding to the base of the flange portion 22, and The area of the light incident portions 32Ab and 32Ac formed on the edge portion 31A of the inner lens 30A, which constitute the incident surface of the light emitted from the inner lens 30A, is increased, and the incident efficiency of the light source light is increased.

Further, in the upper part of the light chamber SA, a light source board 40A on which a light emitting element 42 that emits white light is mounted is arranged with the light emitting element mounting surface (light emitting surface) facing forward, and in the lower part of the light room SA, A light source board 40B on which a light emitting element 42 that emits white light is mounted is arranged with the light emitting element mounting surface (light emitting surface) facing forward. The light source substrates 40A and 40B are each formed in a horizontally long rectangular shape with a length approximately equal to the length in the left-right direction of the light entrance portions 32Ab and 32Ac of the inner lens 30A, and the light emitting element 42 is mounted on the substrates 40A and 40B, with the light emitting element 42 extending along the longitudinal direction of the substrate. A large number of them are arranged at equal intervals in each direction.

Further, the light source boards 40A and 40B on which the light emitting element 42 is mounted are each fixed to the inside of the flange part 12 of the lamp body 10A by a bracket 44, so that the optical axis of the light emitting element 42 is aligned with the light entrance part 32Ab of the inner lens 30, 32Ac so as to directly face each other.

Further, the lamp 100A according to the second embodiment can also function as a tail and stop lamp by controlling the amount of power supplied to the light emitting element 42 so that the brightness of the light emitted from the outer lens 30A changes. , is the same as the lamp 100 according to the first embodiment.

The lamp 100A according to the second embodiment has the following functions and effects.

Generally, on the opposite side of the inner lens, which is far from the side where the light entrance part is formed, the strength of the light guiding inside the inner lens is weaker, so the light is diffusely reflected by the light diffusing material inside the inner lens. The amount of diffused light emitted from the front surface of the laminated outer lenses (the amount of light emitted from the outer lenses) decreases.

In particular, if the outer lens 20A (inner lens 30A) has a large curved region as in this embodiment, the light guide path within the lens 30A is long, and furthermore, light leakage at the curved portion may cause light to enter. The light source light incident on the light section is not sufficiently guided to the tip side of the light guide path in the lens 30A, and the amount of light emitted from the outer lens 20A corresponding to the light entrance section formation side of the inner lens 30A is smaller than that of the light entrance section formation side. There is a possibility that the amount of light emitted by the outer lens 30A corresponding to the opposite side in the circumferential direction is inferior.

However, in the lamp 100A, firstly, the inner lens 30A is laminated on the back side thereof, and the front area 20Aa of the outer lens 20A forming the design surface 21A is formed of a convex curved surface with a relatively small curvature. Therefore, the inner lens 30A is also formed of a convex curved surface with a relatively small curvature. Therefore, most of the light source light that has entered the light entrance portions 32Ab and 32Ac of the inner lens 30A does not leak from the inner lens 30A, which is the light guide path, and the entire inner lens 30A including both left and right ends of the inner lens 30A. guided by. That is, the entire designed surface 21A of the outer lens 20A emits light uniformly and brightly because there is less light leakage during light guiding.

Second, when viewing the inner lens 30A from the front, the light from the light emitting element 42 of the first light source substrate 40A enters the light entrance portion 32Aa formed at the first edge 31Ab of the inner lens 30A. Since the light from the light emitting element 42 of the second light source substrate 40B is incident on the light incident part 32Ac formed on the second edge 31Ac of the inner lens 30A, the intensity of light guiding in the entire inner lens 30A is increased accordingly. increases, and the amount of diffused light emitted from the front wall 20Aa (design surface 21A) of the outer lens 20A (the amount of light emitted from the outer lens 20A) increases accordingly. In other words, the entire design surface 21A of the outer lens 20A, which bulges out to the front, emits light uniformly and brightly.

Third, since the inner lens 30A is not provided with any reflective step elements, the sense of depth of the lamp chamber SA becomes apparent through the front area 20Aa of the outer lens 20A when not lit, resulting in a good appearance.

In addition, when making only a part of the outer lens 20A emit strong light, or when ensuring a predetermined intensity of light distribution on the side of the vehicle (for visibility angle), a reflective step is formed at a predetermined position of the inner lens 30A. However, since the reflective step formation range is small, there is no problem that the reflective step looks white when the lamp is not lit, and the sense of depth of the lamp room SA is not obstructed.

In addition, in this embodiment, the light emission of the light emitting element 42 which is a light source of the 1st and 2nd light source board|substrate 40A, 40B is comprised so that it may directly enter into the light entrance part 32Ab (32Ac) of the inner lens 30A, respectively. However, the fixing positions of the first and second light source boards 40A and 40B are shifted to the rear inside the light chamber SA, and the light guiding member 60 as used in the first embodiment is fixed to the light entrance part 32Ab of the inner lens 30A ( 32Ac) and the light emitting element 42, and the light emitted from the light emitting element 42 of the first and second light source substrates 40A and 40B is directed to the light entrance part 32Ab (32Ac) of the inner lens 30A through the light guiding member 60. ) may be configured so that the light is incident on each of them.

With this configuration, the directional light source light (light emitted from each of the plurality of light emitting elements 42) is guided through the light guide member 60, and becomes light with the influence of the directionality alleviated, and is transmitted to the inner Since the light enters the light entrance portion 32Ab (32Ac) of the lens 30A, it is possible to reliably suppress the occurrence of uneven light emission in the outer lens 20A.

Furthermore, in the embodiment described above, the lamp 100A has been described as a tail-and-stop lamp, but the lamp 100A controls the on/off of power supply to the light emitting elements 42 arranged at equal pitches in the left and right direction for each light emitting element 42. Firstly, it can be used as a sequential lamp in which the flashing area of the outer lens 20A moves in the left and right direction when turned on. Secondly, it can also be used as a so-called "hospitality lamp" that is turned on when a user such as a driver or passenger of a car approaches his or her parked vehicle or when getting on or off the vehicle.

In addition, in the lamp 100A, if the outer lens 20A is made of clear resin, it can be used as a side marker lamp or a daytime running lamp, and if the outer lens 20A is made of amber-colored resin, it can be used as a turn signal lamp. Available.

Furthermore, even if the light emitting element 42 that emits light in amber color is used and the outer lens 20A is made of clear resin, it can be used as a turn signal lamp.

Furthermore, the design surfaces 21, 21A of the

outer lenses

20, 20A of the

lamps

100, 100A in the embodiments described above are formed in a shape that bulges out greatly forward, but the shape is not limited to a shape that bulges out a lot forward. Instead, it may have a planar shape that does not bulge out to the front.

Furthermore, although the

lamps

100 and 100A of the embodiments described above are arranged linearly in the left and right direction on the flat area of the rear panel 102, the

lamps

100 and 100A are arranged vertically or diagonally on the flat area of the rear panel 102. It may be arranged linearly in the direction.

Furthermore, although the

light fixtures

100 and 100A of the above-described embodiments are described as having a horizontal cross section formed linearly in the left-right direction and being attached to a flat area of the rear panel 102, the

light fixtures

100 and 100A of the embodiments described above are light fixtures that are attached to a flat area of the rear panel 102. It may be an attached light (a light that goes around from the rear of the vehicle body to the side), and in this light that goes around from the rear of the vehicle body to the side, the horizontal section of the light 100, 100A is similar to the curved shape (horizontal) of the rear panel that constitutes the corner of the vehicle body. It has a curved shape that bulges outward so as to imitate the shape whose cross section is curved in a convex shape.

This international application claims priority based on Japanese patent application No. 2022-061031, which is a Japanese patent application filed on March 31, 2022. The entire contents of No. 1 are incorporated by reference into this international application.

The above descriptions of specific embodiments of the invention have been presented for purposes of illustration. They are not intended to be exhaustive or to limit the invention to the precise forms described. It will be obvious to those skilled in the art that many modifications and variations are possible in light of the above description.

100,100A

Lamp

10,10A Lamp body 12

Flange portion

20,20A Outer lens 20a, 20Aa Front wall of outer lens 20b Top wall of outer lens 20c Bottom wall of outer lens 20d Left side wall of outer lens 20e Right side wall of

outer lens

21 , 21A Design surface of the outer lens 22 Flange portion 24 Seal leg S,

SA Lamp chamber

30, 30A Inner lens R

Light diffusing material

31, 31A Edge portion of the inner lens facing the rear of the lamp chamber 31b, 31Ab Short direction of the inner lens First edge portion 31c, 31Ac Second edge portion in the short direction of the inner lens 32b, 32Ab First light incident portion for light source light incidence 32c, 32Ac Second light incident portion for light source

light incidence

40 , 40A, 40B Light source board 42 Light emitting element as a light source 50 Reflector 51 Reflective surface 51s cylindrical step element 60 Light guide member 61 Diffusion step 70 Second inner lens

Claims

A lamp chamber is formed by sealing the peripheral edge of a translucent outer lens to the opening peripheral edge of a container-shaped lamp body. A vehicle lamp in which a translucent inner lens is disposed that emits light by guiding the light from the light source that enters a light entrance portion formed at an edge,
The inner lens is laminated on at least a portion of the outer lens, which has a narrow and elongated shape when viewed from the front, and has a structure in which light from the light source enters at least one of the edges in the short direction of the inner lens facing the rear of the lamp chamber. A light part is formed,
A vehicular lamp characterized in that the light from the light source that has entered the light input portion is guided within a lens and is diffusely reflected by the light diffusing material and exits from the outer lens as diffused light.
A region of the outer lens on which the inner lens is laminated is formed in a shape that is bent or curved and bulges forward,
The vehicular lamp according to claim 1, wherein a light entrance portion for the light source light is also formed at the other end edge in the short direction of the inner lens.
A region of the outer lens on which the inner lens is laminated is formed in a shape that is bent or curved and bulges forward,
A first light source is disposed above the lamp chamber, and a second light source is disposed below the lamp chamber,
A first light incident part through which the first light source light enters is formed at one end edge of the inner lens in the short direction,
A second light entrance portion into which the second light source light enters is formed at the other end edge of the inner lens in the short direction;
The vehicular lamp according to claim 1, characterized in that:
The vehicular lamp according to any one of claims 1 to 3, characterized in that a second light guide member for guiding the light from the light source to the light input portion is arranged in the lamp chamber.
The light source is disposed upwardly and downwardly in the lamp chamber,
A region of the outer lens on which the inner lens is laminated is formed in a shape that is bent or curved and bulges forward,
A light entrance portion for the light source light is formed at each end edge in the short direction of the inner lens facing the rear of the lamp chamber,
A part of the light source light is transmitted between the light source and one edge of the inner lens in the short direction into the light input section (first light input section) formed at one edge of the inner lens. A second light guiding member is arranged to guide the
Below the light source in the lamp chamber, there is a reflector that guides a part of the light source light to the light input section (second light input section) formed on the other edge of the inner lens and the entire back surface of the inner lens. was placed,
The vehicular lamp according to claim 1, characterized in that:
A second inner lens is arranged in front of the reflector to diffuse the light reflected by the reflector and directed toward the entire back surface of the inner lens.
The vehicular lamp according to claim 5, characterized in that: