JP7176961B2 - rear combination lamp - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rear combination lamp provided at a rear portion of a vehicle and integrally combining a plurality of lamps.

Patent Document 1 describes a vehicle lighting fixture for a truck, which is a multiple rear combination lamp in which three lamp bodies, a tail and stop lamp lighting fixture, a turn signal lamp lighting fixture, and a stop lamp lighting fixture, are integrated. there is Tail lamps and stop lamps using LEDs (light emitting diodes) as light sources have also been known.

Japanese Patent Application Laid-Open No. 2002-200000 describes a triple-type vehicle lamp provided with a replaceable decorative plate between a light source and a lens in response to the demand for fashionable elements.

JP-A-6-262977 Utility Model Registration No. 3186630

In the vehicle lamp of Patent Document 1, three lamp bodies each having a light source are attached below a substrate, and one back cover is provided so as to cover the back surfaces of the three lamp bodies. made up the lamp.

In the vehicular lamp of Patent Document 2, the LED is reflected in the order of the first reflecting surface and the second reflecting surface provided with the light source in a case provided with an opening hole having a size corresponding to each tail lens. The depth dimension of the vehicle lamp was made compact. In addition, by using diffuse reflection surfaces as the first reflection surface and the second reflection surface, uneven brightness due to a plurality of LEDs has been alleviated.

However, the invention described in Patent Document 1 consists of three lamp bodies each having a light bulb light source attached to a plate-like substrate, and lenses attached to these lamp bodies so as to cover their front openings. Since this lamp is attached, its design is lacking. In addition, it is difficult to reduce the depth of the lamp because the lamps are attached separately, and the electric components must be individually fixed to the rear surface of the lamp body. . Furthermore, the manufacturing and assembly work of the lamps for making the three connections is complicated.

In the invention described in Patent Document 2, a plurality of LEDs are installed so that their emitting directions are oriented rearward from the front side of the vehicle lamp. Therefore, since the LEDs are installed on the emission surface side of the vehicle lamp, it is necessary to cover the plurality of LEDs with a shielding member so that the LEDs cannot be directly seen when the vehicle lamp is viewed from the irradiation direction. And there is a problem that a large space is required on the emission surface side for installation of the LED.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a rear combination lamp with a compact depth and improved visibility when the tail lamp is lit.

In order to achieve the above object, the invention according to claim 1,
A rear combination lamp in which a plurality of lamps using LEDs as light sources are accommodated in a rectangular housing opening forward,
The housing includes a first accommodation part that accommodates a tail lamp (tail light) and a stop lamp (braking light), and a second accommodation part that accommodates at least one of a turn signal lamp (direction indicator light) and a backup lamp (reversing light). and
A plurality of tail lamp light emitting regions functioning as the tail lamps and a plurality of stop lamp light emitting regions functioning as the stop lamps are provided in the first housing portion,
The second accommodation portion is positioned above or below the first accommodation portion,
The stop lamps constituting the stop lamp light emitting region include a first LED light source group composed of a plurality of LEDs provided on a substrate, and reflect light from the first LED light source group toward the emission direction of the lamps. a reflector having a reflective surface that
The reflective surface of the stop lamp includes a plurality of peripheral reflective surfaces surrounding each of the first LED light source groups, and a front side reflective surface positioned between adjacent peripheral reflective surfaces among the plurality of peripheral reflective surfaces. having a face and
The tail lamps constituting the tail lamp light-emitting area are provided on the substrate by a second LED light source group composed of a plurality of LEDs and at least two LED light source groups positioned in front of the second LED light source group. An inner lens and a cover member covering the outermost surface and sides of the inner lens,
The first LED light source group and the second LED light source group are mounted on the front side surface of the substrate so that the direction of emission from each LED is the normal direction of the substrate,
The reflector is integrally formed with an inner lens fixing frame for fixing the two inner lenses,
The inner lens fixing frame has a partition wall that partitions the tail lamp emission region and the stop lamp emission region, and a support portion positioned above or below the first housing portion,
The support portion includes a first support portion that supports an inner lens located on the rear side of the two inner lenses, and a support portion that is located on the front side of the first support portion and supports the inner lens on the front side. The second support portion is formed with steps,
When the rear inner lens is supported by the first supporting portion, the front surface of the rear inner lens is at the same height as the front end of the partition wall. or the position of the rear surface of the rear inner lens is positioned at the same height as the position of the front end of the partition wall,
In the rear inner lens, semi-columnar convex or concave prisms extending in directions orthogonal to each other are formed on the front side surface and the rear side surface, and the semi-columnar convex prisms or concave prisms are formed in the extending direction. Forming a multi-stage shape consisting of a plurality of straight lines that bend in orthogonal cross sections,
In the front inner lens, semi-columnar convex or concave prisms extending in directions perpendicular to each other are formed on the front side surface and the rear side surface. Forming a multi-stage shape consisting of a plurality of straight lines that bend in orthogonal cross sections,
The extending direction of the semi-columnar convex or concave prism formed on the front surface of the rear inner lens is relative to the extending direction of the semi-columnar convex or concave prism formed on the front surface of the front inner lens. is between 30 and 60 degrees,
The peripheral reflecting surface is characterized by being composed of a composite reflecting surface composed of a plurality of reflecting surfaces in vertical and horizontal directions.

The invention according to claim 2 is the rear combination lamp according to claim 1,
The stop lamp light emitting region and the tail lamp light emitting region each include at least two spaced apart light emitting regions, and the tail lamp light emitting regions and the stop lamp light emitting regions are alternately arranged in a horizontal direction. do.

The invention according to claim 3 is the rear combination lamp according to claim 1 or claim 2,
The inner lens is composed of two inner lenses made of a translucent resin material,
The extending direction of the semi-columnar convex or concave prism formed on the front surface of the rear inner lens is relative to the extending direction of the semi-columnar convex or concave prism formed on the front surface of the front inner lens. is 45 degrees.

The invention according to claim 4 is the rear combination lamp according to any one of claims 1 to 3,
The extending direction of the semi-columnar convex prism or concave prism formed on the front surface of the rear inner lens is 45 degrees with respect to the horizontal center line of the first accommodation section. do.

The invention according to claim 5 is the rear combination lamp according to any one of claims 1 to 4,
A semi-columnar diffusion cut extending in the front-rear direction is formed on a side surface of the cover member of the tail lamp.

The invention according to claim 6 is the rear combination lamp according to claim 2,
The rear combination lamp further comprises a control device for independently controlling lighting of the first LED light source group and the second LED light source group,
The reflector is
A reflector having a first design form in which the stop lamp light emitting regions and the tail lamp light emitting regions are alternately arranged in a horizontal direction, and the arrangement of the stop lamp light emitting regions and the tail lamp light emitting regions is different from that of the first design member. The reflector of the second design form is configured to be replaceable without changing the substrate used in the first design form,
The control device is characterized by comprising a changing unit that changes the lighting conditions of the first LED light source group and the lighting conditions of the second LED light source group between the first design form and the second design form. and

The invention according to claim 7 is the rear combination lamp according to any one of claims 1 to 6,
The rear combination lamps are provided on both left and right sides of the rear portion of the truck.

According to the first aspect of the invention, all the LEDs, which are the light sources, can be provided on the same surface side of the substrate, that is, on the surface on the emission direction side of the rear combination lamp. In addition, the assembly can be performed by installing the board on which the LED is mounted, the frame body provided with the reflector, the inner lens, and the outer cover in order from the emission direction side of the rear combination lamp, and the manufacturing cost can be reduced.
In addition, inner lenses provided with semi-columnar prisms extending in a predetermined direction are arranged separately in the emission direction, a tail lamp provided with a cover member covering them, and a stop lamp adjacent to the tail lamp are provided on the inner lens. By providing a predetermined reflective surface having a predetermined relationship with respect to height, it is possible to satisfy the light distribution standard for tail lamps and improve the visibility of the rear combination lamps from an oblique direction.
As a result, it is possible to provide a rear combination lamp in which the depth dimension is made compact and the luminance unevenness of the light distribution characteristics of the tail lamp and the stop lamp is suppressed.

According to the invention of claim 2, the stop lamp light emitting region and the tail lamp light emitting region each include at least two spaced light emitting regions, and the tail lamp light emitting region and the stop lamp light emitting region alternate. Since the lamps are arranged in the horizontal direction, the leakage light reflected by the reflectors of the stop lamps arranged in the horizontal direction through the cover member of the tail lamp can be effectively used to improve the visibility in the oblique direction.

According to the configurations of the third to fifth aspects of the invention described above, it is possible to irradiate diffused light with a large number of minute bright spots instead of simple diffused light emitted by the tail lamp. As a result, it is possible to obtain a light-emitting region with a sense of depth.

According to the sixth aspect of the invention, the stop lamp light emitting region and the tail lamp light emitting region are made of two different designs by using the same housing and LED light source and changing the frame with the position of the reflector changed. Lamps can be manufactured.

1 is a front view of a rear combination lamp according to one embodiment; FIG. FIG. 2 is a schematic perspective view showing an exploded rear combination lamp of FIG. 1; FIG. 2 is a perspective view of a light source substrate used in the light emitting region of the tail and stop lamp of the rear combination lamp of FIG. 1; FIG. 2 is a schematic perspective view showing an exploded tail and stop lamp portion in the rear combination lamp of FIG. 1; It is a schematic perspective view which expands and shows the A section of FIG. FIG. 5 is a plan view of the inner lens used in the tail and stop lamp portion of FIG. 4 when viewed from the emission direction side; FIG. 5 is a plan view of the inner lens used in the tail and stop lamp portion of FIG. 4 when viewed from the side opposite to the emission direction; FIG. 7 is a cross-sectional view of the inner lens of FIG. 6 taken along the line BB. FIG. 5 is an explanatory diagram showing a state when two inner lenses used in the tail-and-stop lamp section of FIG. 4 are superimposed and extending directions of prisms formed in the respective inner lenses are viewed from the output direction side. . 2 is a light distribution diagram showing light distribution characteristics when tail lamps in the rear combination lamp of FIG. 1 are turned on; FIG. FIG. 5 is a front view of a rear combination lamp according to another embodiment; FIG. 11 is a front view showing a modification of the rear combination lamp according to another embodiment;

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings.
The rear combination lamps 10 are provided at both left and right ends of the rear of a vehicle such as an automobile, and are used to indicate the direction of a following vehicle toward the rear of the vehicle (turn), reverse (reverse), brake (stop), and the like. A signal lamp that emits signals of a plurality of functions in order to notify behavior, and emits light toward the rear side of the vehicle. Therefore, in the following description, the terms "front", "rear", "left", "right", "upper", and "lower" refer to directions viewed from the rear combination lamp 10 when installed at the rear of the vehicle. . Therefore, the "front" corresponds to the rear side of the vehicle (backward direction of the vehicle), which is the main irradiation direction of the light from the rear combination lamp 10, and the "rear" corresponds to the front side of the vehicle (the running direction of the vehicle). "Left" corresponds to the right side with respect to the traveling direction of the vehicle.

The rear combination lamp 10 is installed at the rear left end portion of the vehicle (not shown). A rear combination lamp having the same configuration and having a laterally symmetrical shape is installed at the rear right end portion of the vehicle. do. FIG. 1 is a front (front) view of a vehicle lamp (rear combination lamp) 10 according to the present embodiment, and FIG. 2 is a schematic perspective view showing the rear combination lamp in FIG. 1 in an exploded manner.

As shown in FIGS. 1 and 2, the rear combination lamp 10 has a first accommodating portion 5, a second accommodating portion 6 and a third accommodating portion 7 within a horizontally long rectangular housing 11. As shown in FIG. A lamp unit functioning as the tail and stop lamp 2 is positioned in the first housing portion 5, a lamp unit functioning as the back lamp 3 and the turn lamp 1 are positioned in the second housing portion 6, and a third housing portion. A retroreflective portion 4 is provided at 7 . A back lamp 3 and a turn lamp 1 are positioned side by side in the left-right direction below the tail and stop lamp 2, and a retroreflective portion 4 is positioned on the left side of the tail and stop lamp 2. - 特許庁The front side of the housing 11 is covered with a transparent transparent outer cover 19 . In the tail and stop lamp 2, tail lamp units 2 and stop lamp units 2 are alternately arranged.

The housing 11 is made of a light-blocking resin member and has a horizontally long box shape with an opening facing forward. A plurality of vehicle body mounting holes 11a are provided in the upper portion of the housing 11, and the housing 11 is mounted to the rear of the vehicle body (not shown) using screws (not shown). An outer cover 19 is provided on the front side of the housing 11 to cover the tail and stop lamp 2, the back lamp 3, the turn lamp 1, and the retroreflector 4, thereby sealing the outer cover 19 and the housing 11. ing.

The tail-and-stop lamp 2 positioned in the first accommodating portion 5 includes a tail-and-stop lamp light source board 14c on which a plurality of tail-and-stop lamp LEDs 13c, 13c . - It has a reflector frame 15 provided in front of the stop lamp light source board 14c, two inner lenses 17, and a lens cover . The reflector frame 15 has an integral structure divided into portions corresponding to the first accommodation portion 5 , the second accommodation portion 6 and the third accommodation portion 7 . A turn lamp opening 15a, a stop lamp opening 15b, and a reflector 15c are formed in a portion corresponding to the first accommodating portion 5. As shown in FIG. The reflector frame 15 is integrally formed using a resin member such as polycarbonate, and an aluminum reflective film is formed on the front surface. The tail and stop lamp light source board 14 c and the reflector frame 15 are fixed to the housing 11 , and the two inner lenses 17 and the lens cover 18 are fixed to the reflector frame 15 . Reference numeral 21 denotes a tail lamp emission area, and reference numeral 22 denotes a stop lamp emission area. Details of the tail and stop lamp 2 will be described later with reference to FIGS. 3 to 8. FIG.

The turn lamp 1 has a light source substrate 14a on which a plurality of turn lamp LEDs 13a, 13a, . The turn lamp light guide member 13a1 has a rear end surface serving as an incident surface facing the turn lamp LED 13a. emit.

The back lamp 3 has a light source substrate 14a on which a plurality of back lamp LEDs 13b, 13b . . . are mounted, and a light guide member 13b1 provided in front of the light source substrate 14a. The back lamp light guide member 13b1 has a rear end surface that is an incident surface facing the back lamp LED 13b. emit.

The light source substrate 14a is shared by the back lamp 3 and the turn lamp 1, and a plurality of turn lamp LEDs 13a, 13a . . . , 13b . . . The reflector frame 15 has two turn lamp and back lamp openings 15a, 15a of sizes corresponding to the front end surfaces of the turn lamp light guide members 13a1, 13a1, and the front end surface of the back lamp light guide member 13b1. One turn lamp and back lamp opening 15a having a size corresponding to that of the rear lamp is formed. In the present embodiment, the size of the front end surface of the turn lamp light guide member 13a1 and the size of the front end surface of the back lamp light guide member 13b1 are made the same, so that when the rear combination lamp 10 is viewed from the front, The back lamp 3 and the turn lamp 1 have the same design shape so that a sense of unity can be obtained. In FIG. 2, reference numeral 8 denotes a cable for electrically connecting the rear combination lamp 10 and the vehicle, and reference numeral 12 denotes a control board for converting the power supplied from the power supply into a voltage suitable for lighting the LEDs. is.

Next, details of the tail and stop lamp 2 will be described with reference to FIGS. 3 to 8. FIG.

FIG. 3 is a perspective view of the tail and stop lamp light source board 14c used for the tail and stop lamp 2 of the rear combination lamp 10 of FIG. The tail and stop lamp light source board 14c is a printed circuit board made of glass epoxy resin, and is provided with wiring (not shown) for lighting the tail and stop lamp LEDs 13c. The plurality of tail-and-stop lamp LEDs 13c, 13c, . The first LED light source group 21 a corresponds to the tail lamp emission region 21 , and the second LED light source group 22 a corresponds to the stop lamp emission region 22 . The tail lamp light emitting regions 21 and the stop lamp light emitting regions 22 are alternately arranged side by side in the horizontal direction as shown in FIG. In the present embodiment, the first LED light source groups 21a corresponding to the tail lamp light emitting regions 21 are arranged at four locations corresponding to the four light emitting regions. Similarly, the second LED light source group 22a corresponding to the stop lamp light emitting region 22 is arranged at three locations apart from each other. In FIG. 2, the first LED light source group 21a is surrounded by a dotted line, and the second LED light source group 22a is surrounded by a broken line. The plurality of tail and stop lamp LEDs 13c, 13c, .

FIG. 4 is an exploded perspective view showing parts of the reflector frame 15, the inner lens 17 and the lens cover 18 used for the tail and stop lamp 2. FIG. FIG. 5 is a schematic perspective view showing an enlarged view of part A in FIG. A reflector 15c is formed in a region of the reflector frame 15 where the stop lamp light emitting region 22 is formed. The reflector 15c is arranged to cover the front surface of the tail and stop lamp light source board 14c. The reflector 15c is provided with an opening having a size corresponding to each of the tail and stop lamp LEDs 13c constituting the first LED light source group 21a, and a peripheral reflecting surface 27 is formed around the opening. . The peripheral reflecting surface 27 corresponds to the inner lens fixing frame in the present invention. The peripheral reflecting surface 27 is a composite reflecting surface having a multi-stage sawtooth-shaped cross section centered on each tail-and-stop lamp LED 13c that constitutes the first LED light source group 21a. It is divided into a plurality of corresponding areas. Furthermore, at the boundary with the tail lamp light emitting region 21 and the boundary in the left-right direction, a reflecting surface having a multi-stage sawtooth-shaped cross section having a design similar to a composite reflecting surface not provided at the center of each LED 13c is provided. The uniformity of the design of the entire light emitting area 22 is enhanced. A front reflecting surface 28 is formed between each of the partitioned peripheral reflecting surfaces 27 . The front-side reflecting surface 28 is a wall surface having a height that protrudes forward from the surrounding reflecting surface 27, and is also a boundary portion that separates the respective sections.

The region forming the tail lamp light emitting region 21 of the reflector frame 15 is provided adjacent to the stop lamp light emitting region 22, and an opening 15f corresponding to the plurality of LEDs 13c is provided in the center. The opening 15f is surrounded by a surrounding wall surface 15e that defines the stop lamp light emitting area 22. As shown in FIG. The peripheral wall surface 15e is composed of a partition wall 23 positioned in the horizontal direction of the opening 15f and serving as a boundary with the stop lamp light emitting region 22, and a support portion 24 positioned in the vertical direction and supporting the inner lens 17. As shown in FIG.

The support portion 24 is provided with a stepped portion for positioning and fixing the two inner lenses 17 . The first inner lens 17a on the rear side is mounted on the first support portion 24a with a height h1, and the second inner lens 17b on the front side is mounted on the second support portion 24b with a height h3. be placed on. As a result, the first inner lens 17a positioned on the rear side and the second inner lens 17b positioned on the front side are spaced apart by a distance of [h3-h1]. As shown in FIG. 6, the first inner lens 17a has convex portions corresponding to the first supporting portions 24a at its upper and lower ends, and the second inner lens 17b has convex portions corresponding to the first supporting portions 24b at its upper and lower ends. Corresponding ridges are formed. Although only the lower support portion 24 is shown in FIG. 5, the upper support portion is formed in the same manner as the lower side.

When the first inner lens 17a is placed on the first support portion 24a, the height to the front side surface of the first inner lens 17a is the same as the height h2 of the step of this support portion. , the height h1 of the first support portion 24a and the thickness of the inner lens are set. Similarly, the height h4 of the second support portion 24b and the thickness of the inner lens are set so that the height to the front surface of the second inner lens 17b is the same as the height h5 of the step of the support portion. It is Moreover, the height h5 of the partition wall 23 is the same as the height h1 of the first support portion 24a. The height h5 of the partition wall 23 is such that both the left and right edges of the first inner lens 17a are placed on the partition wall 23 at the same time when the first inner lens 17a is placed on the first support portion 24a. is formed to Thus, when the first LED light source group 21a positioned in the tail lamp light emitting region 21 is turned on, all the light from each LED 13a passes through the first inner lens 17a and travels forward. The lens cover 18 is fixed to the reflector frame by a hook structure so as to cover the surrounding wall surface 15e from the upper surface (front side surface) of the second inner lens 17b.

The lowest part of the peripheral wall surface 15e that partitions the stop lamp emission region 22 is the first support portion 24a with a height h1 and the partition wall 23 with a height h5, and the reflector of the stop lamp emission region 22 15c is located at a position lower than the heights h1 and h5, that is, on the rear side. Therefore, when the first LED light source group 21a positioned in the tail lamp light emitting region 21 is turned on, part of the light that has passed through the first inner lens 17a is reflected by the second inner lens 17b, and is reflected on the front side of the partition wall 23. The light is emitted from the side surface 18a of the lens cover 18 covering between the end portion and the second inner lens 17b and directed to the surrounding reflecting surface 27 and the front reflecting surface 28. As shown in FIG. As a result, the light leaking from the lens cover side surface 18a is reflected by the peripheral reflecting surface 27 and the front reflecting surface 28, and diffuses toward the front side of the lamp. Therefore, when the first LED light source group 21a corresponding to the tail lamp light emitting region 21 is turned on, reflected light is emitted not only from the tail lamp light emitting region 21 but also from the reflector, which is the stop lamp light emitting region 22, and is effectively utilized. be. On the side surface 18a of the lens cover, a plurality of so-called flute cut lens elements having a semi-cylindrical cross section are formed. It is designed to emit diffused light.

FIG. 10 shows illuminance measurement data showing light distribution characteristics when only the tail lamp unit 2a is lit. (A) shows the light distribution characteristics when only the first LED light source group 21a located in the tail lamp light emitting region 21 is turned on. In the drawing, the horizontal axis indicates the angle when the center of the rear combination lamp 10 is 0 degrees, and the vertical axis indicates the vertical angle when the center of the rear combination lamp 10 is 0 degrees. The shading indicates isolux areas. (B) shows measurement data obtained by replacing the second inner lens 17b with a black paper member having a rough surface in the same tail lamp unit 2a as in (A). It corresponds to the luminous intensity distribution characteristic of (C) is the same tail lamp unit 2a as in (A), and is measurement data obtained by inserting a black paper member having a rough surface inside the lens cover side surface 18a in contact with the inner surface of the lens cover. It corresponds to the light distribution characteristic of light other than the side surface. Therefore, the light distribution characteristic of (A) roughly corresponds to the combined value of the light distribution characteristic of (B) and the light distribution characteristic of (C). Comparing (A) and (C), the left side (L) is the same up to about 50 degrees, but in (C) the illuminance decreases from about 55 degrees, but in (A) the illuminance decreases from about 60 degrees. It can be seen that there is light leaking from the lens cover side surface 18a. As can be seen from the illuminance curve of the light leaking from the lens cover side surface 18a as shown in (B), a large amount of light leaks from the side surface and is then reflected by the reflector 15c and emitted.

In this embodiment, the first inner lens 17a and the second inner lens 17b are separated from each other, and the heights of the respective lenses and the height of the surrounding wall surface 15e and the reflector are in a predetermined relationship, so that the light leaks from the lens cover side surface 18a. The light is actively used. That is, when the tail lamp unit 2a is turned on, the light leaking from the lens cover side surface 18a is reflected by the reflector of the stop lamp light emitting area 22, in particular, the surrounding reflection surface 27, which is a composite reflection surface that is an aggregate of reflection surfaces in various directions. By reflecting the light, the light distribution characteristic is improved and the visibility of the rear combination lamp 10 as a whole is improved.

FIG. 6 is a plan view showing the shape of each of the inner lenses 17 used in the tail lamp unit 2a of this embodiment when viewed from the emission direction side. A plurality of prism lens cuts are provided on the surface on the emission direction side of the first inner lens 17a, that is, on the front surface. The plurality of prism lens cuts are semi-columnar convex prisms extending in the extending direction 261a as shown in FIG. As shown in FIG. 8, each prism lens cut has a multi-stage shape composed of a plurality of bent straight lines in a cross section orthogonal to the extending direction 261a, and forms a plane in the extending direction 261a. By providing multiple stages, the shape as a whole approximates a semi-columnar convex prism. A plurality of prism lens cuts are also provided on the surface of the second inner lens 17b on the emission direction side, that is, on the front surface. The plurality of prism lens cuts are semi-columnar convex prisms extending in the extending direction 262a, and are the same as the plurality of multi-stage prism lens cuts provided in the first inner lens 17a except that the extending directions are different.

FIG. 7 is a plan view showing the shape of each of the inner lenses 17 used in the tail lamp unit 2a of this embodiment when viewed from the side opposite to the emission direction. A plurality of prism lens cuts are provided on the surface on the emission direction side of the first inner lens 17a, that is, on the front surface. Prism lens cuts formed in the first inner lens 17a and the second inner lens 17b are 262b and 261b, respectively.

FIG. 9 illustrates the relationship between the extending directions of the prism lens cuts formed on the first inner lens 17a and the second inner lens 17b. It shows the relationship between the extension directions when viewed from the front side. The extending directions of the front surface and the rear surface of the first inner lens 17a are orthogonal to each other. Similarly, the extending directions of the front surface and the rear surface of the second inner lens 17b are orthogonal to each other. Further, the extending direction of the first inner lens 17a and the extending direction of the second inner lens 17b have a relationship of 45 degrees. By doing so, it is possible to form a light-emitting surface on which a large number of minute bright spots can be observed by forming inflection points at the intersections of the multi-stage prism lenses. The crossing angle between the extending direction of the first inner lens 17a and the extending direction of the second inner lens 17b is not limited to 45 degrees, and may be between 30 degrees and 60 degrees. This is because when the angle is less than 30 degrees or greater than 60 degrees, it becomes difficult to observe minute bright spots. Also, by providing a plurality of prism lenses in a plurality of directions, it is possible to enhance diffusion. As a result, uneven brightness in the light distribution characteristics of the tail lamp can be suppressed.

The first accommodating portion 5 in which the tail and stop lamp 2 is provided has a horizontally long rectangular shape, and the extending directions 261a and 262b are positioned at 45 degrees with respect to the center line in the horizontal direction. ing. By setting the angle at 45 degrees with respect to the center line, there is a high probability that light leaking from the lens cover side surface 18a when the tail lamp is turned on is emitted at an angle to the horizontal direction, and is reflected by the stop lamp light emitting region 22. Ultimately, the visibility from the oblique rear of the vehicle equipped with the rear combination lamp 10 is improved. The extending directions 261a and 262b of the prism lens cuts provided on the front side surface and the rear side surface of the second inner lens 17b are set to 45 degrees. It is presumed that the effect of

Further, in the present embodiment, a convex prism lens is used, but a concave prism lens may be used. Furthermore, although the first inner lens 17a and the second inner lens 17b are each formed on four surfaces in total, it is sufficient if they are formed on a total of three surfaces. For example, the rear surface of the second inner lens 17b, that is, the surface on the first inner lens side may be a smooth surface without a prism lens. By making the surface smooth, it is possible to increase the amount of light that is partly reflected without entering the inside of the second inner lens 17b, thereby increasing the amount of light that leaks from the lens cover side surface 18a.

The rear combination lamp of this embodiment uses LEDs for all the light sources as described above, and is divided into the first accommodation portion 5, the second accommodation portion 6 and the third accommodation portion 7 having different lamp functions by the reflector frame 15. can be manufactured by assembling from the front side of the housing. As a result, it is possible to reduce the thickness of the rear combination lamp and reduce the size of the lamp as a whole. Furthermore, it is possible to reduce the number of parts and simplify the manufacturing process.

In addition, in the stop lamp light emitting region, since a large number of peripheral reflection surfaces 27 each having a composite reflection surface are formed, it is possible to suppress luminance unevenness in the light distribution characteristics of the stop lamp. Furthermore, by providing the surrounding reflective surface 27 and the front side reflective surface, when the headlights of the following vehicle are illuminated in the off state, the light reflected toward the driver of the following vehicle is reduced. and can be scattered. In particular, when the rear combination lamp of this embodiment is installed on a truck, the installation position tends to be higher than that of a passenger car. In this case, it is possible to prevent the light emitted from the headlamps of the following vehicle from reflecting off the rear combination lamps and causing dazzling light to the driver of the following vehicle.

Next, a rear combination lamp of another embodiment will be described with reference to FIGS. 11 and 12. FIG. The same reference numerals are assigned to the same configurations as those of the rear combination lamp described above, and the description thereof will be omitted here.

FIG. 11 is a front view of a rear combination lamp 30 according to another embodiment, and FIG. 12 is a front view showing a modification of the rear combination lamp according to another embodiment. In the rear combination lamp 30 of FIG. 11 and the rear combination lamp 40 of FIG. 12, the design of the reflector frame in the first accommodation portion 5 that accommodates the tail and stop lamp is the same as that of the tail and stop lamp of the above embodiment. different.

In the rear combination lamp 30 of FIG. 11, the design of the reflector frame consists of reflectors 31 in three regions forming stop lamp light emitting regions and openings 33 in two regions forming tail lamp light emitting regions. It is

On the other hand, in the rear combination lamp 40 of FIG. 12, the design of the reflector frame consists of reflectors 32 in two regions forming stop lamp light emitting regions and openings 34 in three regions forming tail lamp light emitting regions. It is considered a design. The reflector 32 in FIG. 12 has a shape corresponding to the opening 33 in FIG. 11, and the opening 33 in FIG. 12 has a shape corresponding to the reflector 31 in FIG. That is, the rear combination lamp 30 shown in FIG. 11 and the rear combination lamp 30 shown in FIG. 12 are designed to have the same arrangement in the first accommodating portion 5 that accommodates the tail and stop lamps with different lamp functions.

In order to enable such a design change, in the embodiment of FIGS. 11 and 12, two types of reflector frames are created in which the relationship between the reflector and the opening is reversed, and other members, that is, The housing, LED light source, light source substrate, turn lamp, back lamp, retroreflector, and outer cover are all common members. Since the inner lens and the lens cover have different shapes, they are shaped to correspond to two different designs. Reference numeral 30 denotes a rear combination lamp lighting control device, and reference numeral 35 denotes a tail and stop lamp control portion, which is a control portion for changing the signals sent to the LED group to be lit in the case of FIG. 11 and the case of FIG. 12. is. Reference numeral 36 is a power supply. The tail and stop lamp control unit 35 selects the light emission state shown in FIG. 11 or the light emission state shown in FIG. 12, specifically, whether to function as a tail lamp or as a stop lamp, depending on the area. This is the part that is controlled to be dynamically changeable. Thereby, the same rear combination lamp lighting control device 37 can be used.

Although the embodiments of the present invention and their modifications have been described above, the above embodiments and modifications are merely examples in all respects. The present invention is not limitedly interpreted by these descriptions. Various other additions, omissions, substitutions and other modifications are possible without departing from the spirit of the present invention. For example, the light source substrate for the tail and stop lamps and the light source substrate for the turn lamps and back lamps may be the same substrate.

DESCRIPTION OF SYMBOLS 1... Turn lamp 2... Tail and stop lamp 2a... Tail lamp unit 2b... Stop lamp unit 3... Back lamp 4... Retroreflection part (RR)
5 First housing portion 6 Second housing portion 7 Third housing portion 10 Vehicle lamp (rear combination lamp)
11... Housing 12... Control board 13... Light source (LED)
13c... LED for tail and stop lamp
DESCRIPTION OF SYMBOLS 14... Light source board 15... Reflector frame 16... Retroreflection element 17... Inner lens 18... Lens cover (cover member)
REFERENCE SIGNS LIST 19: Outer cover 21: Tail lamp emission region 22: Stop lamp emission region 23: Partition wall 24: Supporting portion 25: Semi-columnar prism 27: Peripheral reflecting surface 28: Front side reflecting surfaces 30, 40: Rear combination lamp 37: Rear combination Lamp lighting controller

Claims (7)

A rear combination lamp in which a plurality of lamps using LEDs as light sources are accommodated in a rectangular housing opening forward,
The housing includes a first accommodation portion that accommodates a tail lamp and a stop lamp, and a second accommodation portion that accommodates at least one of a turn signal lamp and a backup lamp,
A plurality of tail lamp light emitting regions functioning as the tail lamps and a plurality of stop lamp light emitting regions functioning as the stop lamps are provided in the first housing portion,
The second accommodation portion is positioned above or below the first accommodation portion,
The stop lamps constituting the stop lamp light emitting region include a first LED light source group composed of a plurality of LEDs provided on a substrate, and reflect light from the first LED light source group toward the emission direction of the lamps. a reflector having a reflective surface that
The reflective surface of the stop lamp includes a plurality of peripheral reflective surfaces surrounding each of the first LED light source groups, and a front side reflective surface positioned between adjacent peripheral reflective surfaces among the plurality of peripheral reflective surfaces. having a face and
The tail lamps constituting the tail lamp light-emitting area are provided on the substrate by a second LED light source group composed of a plurality of LEDs and at least two LED light source groups positioned in front of the second LED light source group. An inner lens and a cover member covering the outermost surface and sides of the inner lens,
The first LED light source group and the second LED light source group are mounted on the front side surface of the substrate so that the direction of emission from each LED is the normal direction of the substrate,
The reflector is integrally formed with an inner lens fixing frame for fixing the two inner lenses,
The inner lens fixing frame has a partition wall that partitions the tail lamp emission region and the stop lamp emission region, and a support portion positioned above or below the first housing portion,
The support portion includes a first support portion that supports an inner lens located on the rear side of the two inner lenses, and a support portion that is located on the front side of the first support portion and supports the inner lens on the front side. The second support portion is formed with steps,
When the rear inner lens is supported by the first supporting portion, the front surface of the rear inner lens is at the same height as the front end of the partition wall. or the position of the rear surface of the rear inner lens is positioned at the same height as the position of the front end of the partition wall,
In the rear inner lens, semi-columnar convex or concave prisms extending in directions orthogonal to each other are formed on the front side surface and the rear side surface, and the semi-columnar convex prisms or concave prisms are formed in the extending direction. Forming a multi-stage shape consisting of a plurality of straight lines that bend in orthogonal cross sections,
In the front inner lens, semi-columnar convex or concave prisms extending in directions perpendicular to each other are formed on the front side surface and the rear side surface, and the semi-columnar convex prisms or concave prisms are formed in the extending direction. Forming a multi-stage shape consisting of a plurality of straight lines that bend in orthogonal cross sections,
The extending direction of the semi-columnar convex or concave prism formed on the front surface of the rear inner lens is relative to the extending direction of the semi-columnar convex or concave prism formed on the front surface of the front inner lens. is between 30 and 60 degrees,
A rear combination lamp according to claim 1, wherein said peripheral reflecting surface comprises a composite reflecting surface comprising a plurality of reflecting surfaces in vertical and horizontal directions. The stop lamp light emitting region and the tail lamp light emitting region each include at least two spaced apart light emitting regions, and the tail lamp light emitting regions and the stop lamp light emitting regions are alternately arranged in a horizontal direction. The rear combination lamp according to claim 1. The inner lens is composed of two inner lenses made of a translucent resin material,
The extending direction of the semi-columnar convex or concave prism formed on the front surface of the rear inner lens is relative to the extending direction of the semi-columnar convex or concave prism formed on the front surface of the front inner lens. 3. The rear combination lamp according to claim 1, wherein the angle is 45 degrees. The first housing portion has a horizontally long rectangular shape,
The extending direction of the semi-columnar convex prism or concave prism formed on the front surface of the rear inner lens is 45 degrees with respect to the horizontal center line of the first accommodation section. The rear combination lamp according to any one of claims 1 to 3. 5. The rear combination lamp according to claim 1, wherein a side surface of the cover member of the tail lamp is formed with a semi-columnar diffusion cut extending in the front-rear direction. The rear combination lamp further comprises a control device for independently controlling lighting of the first LED light source group and the second LED light source group,
The reflector is
A reflector having a first design form in which the stop lamp light emitting regions and the tail lamp light emitting regions are alternately arranged in a horizontal direction, and the arrangement of the stop lamp light emitting regions and the tail lamp light emitting regions is different from that of the first design member. The reflector of the second design form is configured to be replaceable without changing the substrate used in the first design form,
The control device is characterized by comprising a changing unit that changes the lighting conditions of the first LED light source group and the lighting conditions of the second LED light source group between the first design form and the second design form. 3. The rear combination lamp according to claim 2. 7. The rear combination lamp according to claim 1, wherein the rear combination lamp is provided on both left and right sides of the rear portion of the truck.

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