JP6793519B2 - Vehicle lighting - Google Patents

Description

The present invention relates to a vehicle lamp that uses an LED (light emitting diode) or the like as a light source.

In recent years, LEDs with high brightness and long life have been used as light sources for vehicle lamps such as headlamps and tail lamps. However, since the light emitted from these LEDs shows strong directivity, the light having strong directivity is used. Cannot be used as it is. For this reason, the light with strong directivity emitted from the LED is incident on the light guide body, reflected in the process of guiding the light inside the light guide body, and emitted to the outside, thereby causing the entire light guide body to emit light. ing. For example, Patent Document 1 proposes a vehicle lamp as shown in FIG.

That is, FIG. 8 is a plan sectional view of the vehicle lighting equipment proposed in Patent Document 1, and in the illustrated vehicle lighting equipment (tail & stop lamp) 101, the light emitted from the LED 105 as a light source is emitted from the light guide body 112. In the process of guiding the light incident on the light guide body 112 in the light guide body 112, the light is reflected in various directions, and the reflected light is emitted from the exit surface of the light guide body 112. The entire light guide body 112 is made to emit light.

However, in such a vehicle lamp 101, in addition to the need for the light guide 112, there is a problem that the vicinity of the LED 105 of the light guide 112 emits bright light and becomes darker as the distance from the LED 105 increases. Further, since the LED 105 is visible from the outside through the transparent transparent cover (outer lens) 103 when it is not lit, there is also a problem that the vehicle lamp 101 does not look good.

Further, Patent Document 2 proposes a vehicle lamp as shown in FIG. 9 which does not use a light guide.

That is, FIG. 9 is a vertical sectional view of the vehicle lamp (combination lamp) proposed in Patent Document 2. In the illustrated vehicle lamp 201, the LED 205, which is a light source, is expanded downward from the lamp body (housing) 202. It is arranged in the space formed by the protruding portion (lower portion) 202A, and the light emitted obliquely upward from the LED 205 is diffused and reflected in various directions by the diffusion step 206a formed on the reflecting surface of the reflector 206, and the light is reflected. Light is transmitted through the inner lens 209 and further diffused by the diffusion steps 209a and 209b formed on the front and back surfaces of the inner lens 209.

Japanese Unexamined Patent Publication No. 2004-103379 Japanese Unexamined Patent Publication No. 2015-076249

However, in the vehicle lamp 201 shown in FIG. 9 proposed in Patent Document 2, a bulging portion (lower portion) 202A is formed in the lower portion of the lamp body 201, and the LED 205 is arranged inside the bulging portion 202A. Therefore, there is a problem that the vehicle lamp 201 becomes large.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a vehicle lamp that can be made compact and compact while realizing uniform light emission without using a light guide. is there.

In order to achieve the above object, the invention according to claim 1 accommodates at least a light source and a reflector for reflecting light emitted from the light source in a lamp chamber defined by an outer lens covering the housing and the opening thereof. The light source is arranged within the light emitting range of the outer lens so that the light emitting direction is opposite to the light emitting direction from the outer lens, and the light source is reflected on the reflecting surface of the reflector. It is characterized by forming a reflection cut that reflects light once or twice depending on the angle of incidence of light on a surface.

The invention according to claim 2 is the invention according to claim 1, wherein the reflector is provided with the first to fourth reflecting surfaces, and the first reflecting surface of the light emitted from the light source is provided on the third reflecting surface. The light reflected by and incident on the third reflecting surface is reflected twice toward the outer lens, and the light reflected by the second reflecting surface and incident on the third reflecting surface is directed toward the fourth reflecting surface. It is characterized in that one kind of reflection cut having the same shape and the same size is formed to reflect once.

The invention according to claim 3 is characterized in that, in the invention according to claim 2, the fourth reflecting surface covering the light source from the front side is arranged in the lamp chamber.

The invention according to claim 4 is the invention according to any one of claims 1 to 3, characterized in that it has a light source mounting substrate provided with a mounting surface on which the light source is mounted, and the mounting surface is a reflective surface. And.

According to the first aspect of the present invention, since the light source is arranged within the light emitting range of the outer lens, the vehicle lamp can be made smaller and more compact. Further, since the reflection cut is formed on the reflection surface of the reflector to reflect the light once or twice depending on the angle of incidence of the light on the reflection surface, the light emitted from the light source is reflected and diffused in various directions by the reflection cut. It is possible to realize uniform light emission without using a light guide.

According to the invention of claim 2, one kind of reflection cut having the same shape and the same size is formed on the third reflecting surface, and the light incident on the third reflecting surface is reflected once according to the incident angle. Alternatively, since it is reflected twice and diffused, the reflection cut can be formed easily and with high accuracy at low cost.

According to the invention of claim 3, since the light source is hidden behind the fourth reflecting surface and cannot be seen from the front side when the lamp is not lit, the appearance of the vehicle lamp when the lamp is not lit is enhanced.

According to the invention of claim 4, the utilization efficiency of the light emitted from the light source can be enhanced by the reflecting surface formed on the mounting surface of the light source mounting substrate.

It is a front view of the state which removed the outer lens of the vehicle lamp according to this invention. FIG. 1 is a cross-sectional view taken along the line AA of FIG. It is an enlarged detailed view of part B of FIG. It is an enlarged detailed view of part C of FIG. It is an enlarged detailed view of part D of FIG. FIG. 5 is a cross-sectional view taken along the line EE of FIG. (A) is a diagram showing a vertical flute cut, and (b) is a diagram showing a horizontal flute cut. FIG. 5 is a plan sectional view of a vehicle lamp proposed in Patent Document 1. It is a vertical cross-sectional view of the vehicle lamp device proposed in Patent Document 2.

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a front view of the vehicle lamp according to the present invention with the outer lens removed, FIG. 2 is a sectional view taken along line AA of FIG. 1, FIG. 3 is an enlarged detailed view of part B of FIG. 2, and FIG. 4 is FIG. C part enlarged detailed view, FIG. 5 is an enlarged detailed view of D part of FIG. 2, FIG. 6 is a sectional view taken along line EE of FIG. 5, FIG. 7 (a) is a view showing a vertical flute cut, and FIG. 7 (b). Is a diagram showing a horizontal flute cut.

The vehicle lamp 1 according to the present embodiment functions as tail lamps arranged on the left and right rear parts of the vehicle, and the basic configurations of the left and right tail lamps are the same. Only illustrated and described.

The vehicle lamp 1 according to the present embodiment used as a tail lamp is a lamp chamber defined by a housing 2 (see FIG. 1) and a transparent outer lens 3 (see FIG. 2) covering the opening of the housing 2. In 4 (see FIG. 2), an LED 5 which is a light source, a first reflector 6 and a second reflector 7 and a third reflector 8 which reflect the light emitted from the LED 5, two transparent first inner lenses 9 and It is configured to accommodate the second inner lens 10 and the LED mounting substrate 11. The mounting surface of the LED mounting board 11 on which the LED 5 is mounted constitutes a reflective surface.

As shown in FIG. 2, the LED 5 is in the light emitting range of the vehicle lighting tool 1 (outer lens 3), and the light emitting direction thereof is opposite to the light emitting direction from the outer lens 3 (rear of the vehicle). It is arranged so as to be (above 2). The LED 5 is covered from the front side by the third reflector 8, and the LED 5 can be seen from the front through the outer lens 3 and the first and second inner lenses 9 and 10 when the vehicle lamp 1 is not lit. There is no such thing.

The first reflector 6 and the second reflector 7 are diagonally arranged along the vehicle width direction in a state of being connected to each other in the front direction of light emission from the LED 5 (upper side of FIG. 2), and the third reflector Reference numeral 8 is arranged obliquely along the vehicle width direction behind the vehicle (lower part of FIG. 2) with respect to the LED 5. The LED mounting board 11 is arranged between the third reflector 8 and the first reflector 6, and the LED 5 is arranged on a surface that cannot be seen from the front on the back side of the LED mounting board 11.

Here, the inner surface of the first reflector 6 constitutes a concave curved first reflecting surface 6a and a second reflecting surface 6b that bend at a substantially right angle, and each inner surface of the second reflector 7 and the third reflector 8 is concave. The curved third reflecting surface 7a and the fourth reflecting surface 8a are formed, respectively. The first to fourth reflecting surfaces 6a, 6b, 7a, and 8a are subjected to a reflection treatment such as aluminum vapor deposition to increase the reflectance, and the third reflecting surface 7a of the second reflector 7 is subjected to reflection treatment. As shown in FIGS. 3 and 4, one type of reflection cut 7a1 having the same shape (saw blade shape) and the same size that reflects the light incident on the light twice or once depending on the angle of incidence is applied to the entire surface. It is formed over.

Further, as shown in FIG. 5, a fisheye lens-shaped crosscut 9a that diffuses the light incident on the first inner lens 9 in the vertical and horizontal directions is formed on the back surface (rear surface) of the first inner lens 9. ing. Then, as shown in FIGS. 5 and 6, the surface (front surface) of the second inner lens 10 is shown in FIG. 7 (a) for diffusing the light incident on the second inner lens 10 in the left-right direction. The plurality of vertical flute cuts 10a shown are formed, and on the back surface (rear surface), a plurality of horizontal flute cuts 10b shown in FIG. 7B for diffusing the light emitted from the second inner lens 10 in the vertical direction are formed. It is formed.

Next, the operation of the vehicle lamp 1 configured as described above will be described.

When the LED 5, which is a light source, is activated at night or the like and emits light, as shown in FIG. 2, the light directed to the first reflecting surface 6a of the first reflector 6 is the first reflecting surface 6a. It reflects toward the third reflecting surface 7a of the second reflector 7. Then, as shown in FIG. 3, the reflected light is incident at a relatively large incident angle with respect to the third reflecting surface 7a, and is reflected twice by the reflection cut 7a1 formed on the third reflecting surface 7a. With the cross cut 9a formed on the back surface (rear surface) of the first inner lens 9 in the process of going to the first and second inner lenses 9 and 10 and transmitting through these first and second inner lenses 9 and 10. The vertical flute cut 10a and the horizontal flute cut 10b formed on the front and back surfaces (front and rear surfaces) of the second inner lens 10 diffuse the light in the vertical and horizontal directions. Then, the light diffused in the vertical and horizontal directions by the first and second inner lenses 9 and 10 finally passes through the outer lens 3 and is emitted to the outside. The relatively large incident angle refers to an angle (a large angle of about 1 ° to 10 °) larger than the angle formed by the first reflecting surface when reflecting twice.

Further, the light emitted from the LED 5 and directed toward the second reflecting surface 6b of the first reflector 6 is directed toward the third reflecting surface 7a of the second reflector 7 by the second reflecting surface 6b as shown in FIG. reflect. Then, as shown in FIG. 4, this reflected light is incident at a relatively small incident angle with respect to the third reflecting surface 7a, and is reflected once by the reflection cut 7a1 formed on the third reflecting surface 7a to obtain the third light. 3 Heads toward the fourth reflecting surface 8a of the reflector 8. Then, this light is reflected by the fourth reflecting surface 8a of the third reflector 8 and directed to the first and second inner lenses 9 and 10, and is transmitted through these first and second inner lenses 9 and 10. In the same manner as described above, the light diffuses in the vertical and horizontal directions, and finally passes through the outer lens 3 and is emitted to the outside. The relatively small angle means an angle smaller than the angle formed by the first reflecting surface when reflecting twice (a small angle of about 1 ° to 5 °).

As described above, in the vehicle lighting tool 1 according to the present embodiment, the light is reflected once or 2 on the third reflecting surface 7a of the second reflector 7 depending on the angle of incidence of the light on the third reflecting surface 7a. Since the reflection cut 7a1 to be reflected repeatedly is formed, the highly directional light emitted from the LED 5 can be reflected and diffused in various directions by the reflection cut 7a1, and the reflected light is reflected and diffused in the first and second inner lenses 9, 10. Since the light is further diffused in the vertical and horizontal directions, uniform light emission by the LED 5 can be realized without using a light guide. Here, since one type of reflection cut 7a1 having the same shape and the same size is formed on the third reflection surface 7a of the second reflector 7, the reflection cut 7a1 can be formed easily and with high accuracy at low cost.

Further, in the present embodiment, as shown in FIG. 2, since the LED 5 is arranged within the light emitting range of the vehicle lamp 1 (outer lens 3), the vehicle lamp 1 can be made compact and compact.

Further, in the present embodiment, since the third reflector 8 that covers the LED 5 from the front side is arranged in the lamp chamber 4, the LED 5 is hidden behind the third reflector 8 and cannot be seen from the front side when the lamp is not lit. It is also possible to obtain the effect of enhancing the appearance of the vehicle lamp 1 when it is not lit.

Further, in the present embodiment, there is also an effect that the utilization efficiency of the light emitted from the LED 5 can be enhanced by the reflecting surface formed on the mounting surface of the light source mounting substrate 11.

Although the embodiment in which the present invention is applied to a vehicle lamp used as a tail lamp has been described above, the present invention can be similarly applied to a vehicle lamp used for any other lamp. Of course.

Further, in the above embodiment, a red LED is used as the light source, and a transparent color is used for the first inner lens and the second inner lens, but the light source is a fiber light source or a laser depending on the function of the lamp. A light source or the like may be used, and the emission color of the light source and the color of the inner lens can be freely selected.

1 Vehicle lighting equipment 2 Housing 3 Outer lens 4 Lighting room 5 LED (light source)
6 1st reflector 6a 1st reflecting surface 6b 2nd reflecting surface 7 2nd reflector 7a 3rd reflecting surface 7a1 Reflecting cut 8 3rd reflector 8a 4th reflecting surface 9 1st inner lens 9a Crosscut 10 2nd inner lens 10a Vertical Flute cut 10b Horizontal flute cut 11 LED mounting board (light source mounting board)

Claims (4)

In a vehicle lamp, at least a light source and a reflector that reflects light emitted from the light source are housed in a lamp chamber defined by an outer lens that covers the housing and its opening.
The light source is arranged within the light emitting range of the outer lens so that the light emitting direction thereof is opposite to the light emitting direction from the outer lens, and the light is incident on the reflecting surface of the reflector. A vehicle lighting fixture characterized by forming a reflection cut that reflects light once or twice depending on the corner. The outer lens is provided with first to fourth reflecting surfaces on the reflector, and among the light emitted from the light source , the light reflected by the first reflecting surface and incident on the third reflecting surface is reflected on the third reflecting surface. One type of reflection cut of the same shape and size that reflects light twice toward the second reflecting surface and reflects the light incident on the third reflecting surface once toward the fourth reflecting surface. The vehicle lighting equipment according to claim 1, wherein the light fixture is formed. The vehicle lighting fixture according to claim 2, wherein the fourth reflecting surface that covers the light source from the front side is arranged in the lighting chamber. The vehicle lamp according to any one of claims 1 to 3, further comprising a light source mounting substrate provided with a mounting surface on which the light source is mounted, and having the mounting surface as a reflecting surface.

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