JP2010170983A - Lighting fixture for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lighting fixture for vehicle capable of obtaining high reliability and improving miniaturization, without resulting in reduction of light-emitting amount and degradation of reliability due to heat. <P>SOLUTION: The lighting fixture for vehicle 10 includes, in a lamp chamber 14 defined with a front face cover 13 and a lamp body 11, an incandescent light bulb 15 and a first reflector 12 in which light-emitting light from the incandescent light bulb 15 is reflected toward the front face cover 13 side. Moreover, the lighting fixture for vehicle 10 includes an LED 16 of which light-emitting function is different from that of the incandescent light bulb 15 and which is arranged rearward the first reflector 12, and a second reflector 20 in which the light-emitting light of the LED 16 is reflected toward the front face cover 13 side. Moreover, the first reflector 12 includes a passing region 19 in order to make the reflected light pass through from the second reflector 20 of the LED 16 to the front face cover 13 side. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a vehicular lamp including a light source and a reflector that reflects light from the light source in a lamp chamber formed by a lamp body and a front cover.

  As an example of a conventional vehicular lamp, there is known a vehicular lamp in which a plurality of LEDs (light emitting diodes) serving as second light sources are arranged in front of an incandescent bulb serving as a first light source (see, for example, Patent Document 1). .

Japanese Patent Laid-Open No. 7-288011

However, in the vehicular lamp disclosed in Patent Document 1, when the incandescent light bulb is turned on, heat from the incandescent light bulb is propagated around the LED. For this reason, when the incandescent bulb and the plurality of LEDs are turned on simultaneously, the temperature of the LED is remarkably increased, which may cause a decrease in light emission amount and a decrease in reliability due to heat.
Moreover, in the vehicular lamp disclosed in Patent Document 1, since a plurality of LEDs are arranged in front of the incandescent light bulb, the overall depth dimension is increased, and it is difficult to reduce the size.

  SUMMARY OF THE INVENTION An object of the present invention is to solve the above-described problems, and provides a vehicle lamp that can achieve high reliability and can be reduced in size without causing a decrease in light emission amount or a decrease in reliability due to heat. It is to provide.

The object of the present invention is to reflect the first light source and the light from the first light source forward in a lamp chamber formed by a lamp body whose front is open and a front cover attached to the front opening. A vehicle lamp comprising a first reflector and a second light source disposed behind the first reflector,
The first light source and the second light source have different light emitting functions, and the first reflector includes a passage region for irradiating light from the second light source forward. Achieved by a vehicular lamp.

According to the vehicular lamp configured as described above, the first light source and the second light source have different light emitting functions, and the first reflector includes a passage region for irradiating light from the second light source forward. Therefore, the 2nd light source arrange | positioned behind a reflector irradiates emitted light to the front cover side through the passage area | region of a reflector.
Thereby, for example, even when an incandescent bulb is selected as the first light source and an LED is selected as the second light source, it is possible to secure the light emitting areas defined by the light emitting function of the first light source and the light emitting function of the second light source, respectively. it can.
In addition, a reduction in the amount of light emission associated with a rise in LED temperature and a decrease in reliability due to heat as in the conventional case are not caused, and a highly reliable vehicle lamp can be obtained.

  In the vehicular lamp configured as described above, the second light source is reflected forward by a second reflector disposed in the vicinity of the first reflector, and at least one of the first reflector or the second reflector is rearward. It is desirable to have a heat radiating member opened to the side, and the substrate is fixed to the heat radiating member.

  According to the vehicular lamp configured as described above, the radiant heat transmitted to the second light source and the substrate can be efficiently dissipated by the heat dissipating member, and heat dissipating performance can be improved.

  Further, in the vehicular lamp configured as described above, the first light source is a light source that transmits light through a colored tube or a colored cover, and the colored tube or the light source is between the second light source and the passage region. It is desirable that a light shielding part for shielding light from the second light source toward the coloring cover is formed.

  According to the vehicular lamp having the above configuration, the light from the second light source directed toward the colored tube or the colored cover of the first light source is surely shielded, so that it is affected by the colored tube or the colored cover of the first light source. The regular light from the second light source can be emitted from the front cover.

  In the vehicular lamp configured as described above, it is preferable that the first reflector includes an optical control member in the passage region.

  According to the vehicular lamp configured as described above, the direction of light from the second light source can be appropriately controlled by providing an optical control member (for example, a Fresnel lens) in the passage region.

  In the vehicular lamp configured as described above, it is preferable that only one of the first light source and the second light source is turned on.

According to the vehicular lamp configured as described above, for example, the first light source having the first light emission function is used as a turn signal lamp, and the second light source having the second light emission function is used as a daytime running lamp. In this case, the daytime running lamp is turned on during daytime running, and the daytime running lamp is turned off and the turn signal lamp is turned on when changing the course or turning right or left. When the course change is completed, the turn signal lamp is turned off and the daytime running lamp is automatically turned on.
Thus, by storing two light emitting functions in one lamp unit and lighting only one of them, the light emitting area defined by each light emitting function can be ensured reliably, and during daytime driving The reliability can be further improved.

According to the vehicular lamp according to the present invention, the first light source and the second light source have different light emitting functions, the second light source is disposed behind the first reflector, and the first reflector is the second light source. A passage region for irradiating light from the front is provided.
As a result, it is possible to secure a light emitting area defined by each light emitting function, and to exhibit high reliability without causing a decrease in light emission amount or a decrease in reliability due to heat, and downsizing Can be achieved.

1 is a partially broken external perspective view of a vehicular lamp 10 according to a first embodiment of the present invention. It is a front view of the vehicle lamp 10 of FIG. FIG. 3 is a cross-sectional view taken along line AA of the vehicular lamp 10 of FIG. 2. FIG. 3 is a cross-sectional view of the vehicular lamp 10 of FIG. 2 taken along the line BB. It is CC sectional view taken on the line of the vehicle lamp 10 of FIG. It is the DD sectional view taken on the line of the vehicle lamp 10 of FIG. It is sectional drawing of the vehicle lamp 30 which concerns on 2nd Embodiment of this invention. FIG. 6 is a cross-sectional view of a vehicle lamp 40 that is a modification of the vehicle lamp 30.

  Hereinafter, preferred embodiments of a vehicular lamp according to the present invention will be described in detail with reference to the accompanying drawings. First, 1st Embodiment of the vehicle lamp which concerns on this invention is described based on FIGS.

  As shown in FIG. 1, a vehicular lamp 10 according to a first embodiment of the present invention includes a resin lamp body 11 that is fixed to a vehicle body in a shape in which the front side of the vehicle is opened, and the front side of the lamp body 11. The front turn signal lamp unit includes a front cover 13 made of a transparent resin such as colorless or orange that is attached to the side opening.

  In addition, the vehicular lamp 10 includes an incandescent bulb 15 that is a first light source housed in a lamp chamber 14 that is partitioned by a lamp body 11 and a front cover 13, and light from the first light source toward the front cover 13. A first reflector 12 that reflects, a plurality of LEDs 16 that are second light sources assembled on the vehicle rear side of the first reflector 12, a second reflector 20 that reflects light from the second light source toward the front cover 13, and It has.

  The incandescent bulb 15 functions as a front turn signal lamp (FTSL) which is a first light emitting function. The LED 16 functions as a daytime running lamp (DRL) that is a second light emitting function that emits light independently of the turn signal lamp when the turn signal lamp is turned off. The incandescent bulb 15 may be a colored tube in which the bulb is colored white or amber, or a colorless bulb may be covered with a colored cover.

As shown in FIG. 2, the incandescent light bulb 15 is disposed in the center of the lamp body 11, and two LEDs 16 are disposed in the vertical direction on the left and right outer sides with the incandescent light bulb 15 as the center.
The first reflector 12 forms a first reflection region 17 for reflecting light from the incandescent bulb 15 around the incandescent bulb 15.

  The first reflection region 17 includes a pair of outer periphery reflections through a center reflection region 18a located in the vicinity of the incandescent bulb 15 and a pair of passage regions 19 which are vertically long spaces formed on both left and right sides of the center reflection region 18a. Region 18b.

The second reflector 20 forms four second reflection areas 21 for reflecting the light emitted from the LEDs 16 in the pair of passage areas 19. That is, the 2nd reflector 20 is arrange | positioned between the center part reflection area | region 18a and the outer peripheral part reflection area | region 18b, and forms the 2nd reflection area | region 21 for LED16.
The 2nd reflector 20 is a curved surface shape which makes the vehicle front side concave, and is comprised in the vertically long shape corresponding to each LED16 and the passage area | region 19 which are arrange | positioned by the left-right pair by 2 each vertical direction.

  The 1st reflector 12 which forms the 1st reflective area | region 17, and the 2nd reflector 20 which forms the 2nd reflective area | region 21 are integrated as a single component. Therefore, the first reflection area and the second reflection area 21 are arranged with high positional accuracy.

As shown in FIG. 3, the front cover 13 has a diffusion step 22 formed on the back surface thereof. Since this diffusion step 22 is formed of a plurality of uneven surfaces, it irradiates the front of the vehicle while diffusing light from the incandescent bulb 15 and the LED 16. The front cover 13 may cover the entire front surface of the front combination lamp, for example, instead of being attached only to the lamp body 11.
The lamp body 11 has a back plate 23 fixed to the vehicle rear side. Then, the incandescent bulb 15 attached to the socket 24 is fixed to the center portion of the back plate 23.

  As shown in FIG. 4, two LEDs 16 are arranged in the vertical direction on both sides of the central reflection region 18 a and at positions on the vehicle rear side of the outer peripheral reflection region 18 b. The LEDs 16 are respectively mounted on the LED substrate 25.

  As shown in FIG. 5, the LED 16 is disposed on the LED substrate 25 so that its optical axis Ax2 is substantially orthogonal to the optical axis Ax1 of the incandescent bulb 15. The LED board 25 on which the LEDs 16 are arranged is fixed to the heat radiating member 26 so that the radiant heat generated from the LEDs 16 can be radiated.

  The heat dissipating member 26 is a heat sink formed using a heat dissipating metal such as aluminum. The heat dissipating member 26 is opened to the vehicle rear side of the lamp body 11 and is fixed so as to be able to dissipate heat. Therefore, the emitted heat transferred to the LED 16 and the LED substrate 25 can be efficiently radiated.

  Next, the optical action of the vehicular lamp 10 will be described with reference to FIGS.

  When power for lighting the daytime running lamp is supplied from a vehicle battery (not shown), the LED 16 emits light as shown in FIG. The emitted light α1 of the LED 16 is reflected by the second reflector 20 that forms the second reflection region 21, and is emitted from the front region 13 toward the front of the vehicle while being diffused through the diffusion step 22 from the passage region 19. At this time, the incandescent bulb 15 is turned off.

  As shown in FIG. 6, when a turn signal switch (not shown) separate from the daytime running lamp system is turned on in accordance with a steering operation such as a course change, the incandescent bulb 15 is turned on. The emitted light α2 of the incandescent bulb 15 is reflected by the central reflection area 18a of the first reflection area 17 and reflected by the outer peripheral reflection area 18b, and is directed from the front cover 13 toward the front of the vehicle via the diffusion step 22. Irradiated. At this time, the LED 16 is turned off. That is, the incandescent bulb 15 and the LED 16 do not light up simultaneously during daytime running.

As described above, the vehicular lamp 10 of the present embodiment has a different light emitting function between the incandescent light bulb 15 that is the first light source and the LED 16 that is the second light source disposed behind the first reflector 12. In the 1st reflector 12, the 2nd reflector 20 which reflects the emitted light (alpha) 1 from LED16, and the passage area | region 19 for irradiating this reflected light (alpha) 1 to the front cover 13 side are provided. Thus, the emitted light α1 of the LED 16 is reflected by the second reflector 20 that forms the second reflection region 21, passes through the passage region 19, and is irradiated forward on the front cover 13 side. Therefore, the emitted light α1 of the LED 16 is efficiently reflected by the second reflector 20 and high light distribution performance can be obtained.
Therefore, even if the incandescent bulb 15 is selected as the first light source and the LED 16 is selected as the second light source, the light emitting areas defined by the light emitting function of the first light source and the light emitting function of the second light source can be ensured. In addition, a highly reliable vehicular lamp can be obtained without causing a decrease in the amount of light emission accompanying a rise in LED temperature or a decrease in performance due to heat.

The optical axis Ax2 of the LED 16 is arranged in a direction substantially orthogonal to the optical axis Ax1 of the incandescent bulb 15, and the emitted light α1 from the LED 16 is a second reflector arranged in the vicinity of the first reflector 12. 20 is reflected to the front cover 13 side.
Thereby, since LED16 is not arrange | positioned ahead of the incandescent bulb 15 like the past, it can prevent LED16 becoming high temperature by the infrared rays from the incandescent bulb 15. Further, since the incandescent bulb 15 and the LED 16 are disposed in the same lamp chamber, it is possible to share the light emitting area without interference of the light emitted from the both, thereby reducing the size. Also, the emitted light α1 from the LED 16 is efficiently reflected by the second reflector 20, and high light distribution performance can be obtained.

  The vehicular lamp 10 includes a heat radiating member 26 opened to the rear side of the first reflector 12. Thereby, since the LED board 25 is being fixed to the heat radiating member 26, the emitted light heat transmitted to LED16 and the LED board 25 can be efficiently radiated, and the heat radiation performance can be improved.

  The first reflector 12 has a first reflection region 17 located in the vicinity of the optical axis Ax1 of the incandescent bulb 15, and the second reflector 20 has a second reflection region 21 that reflects the emitted light α1 from the LED 16. The first reflector 12 and the second reflector 20 are integrated as a single component. Thereby, while being able to improve the positional accuracy of both the reflective areas 17 and 21, higher light distribution performance can be obtained.

Further, only one of the incandescent bulb 15 and the LED 16 is controlled to be lit. Thereby, for example, when the incandescent bulb 15 having the first light emitting function is used as the turn signal lamp and the LED 16 having the second light emitting function is used as the daytime running lamp, the daytime running lamp is lit during daytime running. . When the course is changed, the daytime running lamp is turned off with the steering operation, and the turn signal lamp is turned on. Thereafter, when the course change is completed, the turn signal lamp is turned off and the daytime running lamp is automatically turned on.
Thus, by storing two light emitting functions in one lamp unit and lighting only one of them, the light emitting area defined by each light emitting function can be ensured reliably, and during daytime driving The reliability can be further improved.

  Next, a second embodiment of the vehicular lamp according to the present invention will be described with reference to FIG. In addition, about the structure same as the said 1st Embodiment, description is simplified or abbreviate | omitted by attaching | subjecting the same code | symbol.

  As shown in FIG. 7, the vehicular lamp 30 according to the second embodiment of the present invention is different from the first embodiment in that the LED 16 has an optical axis substantially parallel to the optical axis Ax1 of the incandescent bulb 15. The LED substrate 25 is fixed on the heat radiating member 26 so as to become. Moreover, the structure equivalent to a 2nd reflector and a 2nd reflective area | region is not provided.

  The vehicular lamp 30 includes a Fresnel lens 31 that is an optical control member in the passage area 19 provided in the first reflector 12 that forms the first reflection area 17. The position of the Fresnel lens 31 is set so that the LED 16 is on the focal point of the Fresnel lens 31. The LED 16 is not necessarily arranged on the focal point of the Fresnel lens 31, and diffused light may be generated through the Fresnel lens 31.

  Further, the vehicular lamp 30 includes a light shielding wall 32 that is a light shielding portion that shields the emitted light α <b> 1 of the LED 16 toward the colored tube or colored cover of the incandescent bulb 15 between the LED 16 and the passage area 19. By providing the light shielding wall 32, the emitted light α1 can be prevented from being affected by the color of the incandescent bulb 15.

  The emitted light α1 of the LED 16 is irradiated from the front cover 13 to the front of the vehicle through the diffusion step 22 from the passage area 19 as substantially parallel light through the Fresnel lens 31. In addition, since the light shielding wall 32 is provided, it is not affected by the color of the incandescent bulb 15.

  As described above, the vehicular lamp 30 according to the present embodiment includes the light shielding wall 32 between the LED 16 and the passage area 19 for shielding the emitted light α1 of the LED 16 toward the colored tube or the colored cover of the incandescent bulb 15. . Thereby, the emitted light α1 can be prevented from being affected by the color of the incandescent bulb 15.

  The vehicular lamp 30 includes a Fresnel lens 31 in the passage area 19. Thereby, the direction of the emitted light α1 of the LED 16 can be appropriately controlled.

Next, a modification of the above-described second embodiment will be described.
As shown in FIG. 8, a vehicle lamp 40 that is a modification of the vehicle lamp 30 described above includes a second reflector 41 that forms a second reflection region 42 instead of the Fresnel lens. Further, the second reflector 41 includes a light shielding wall 43 that shields the emitted light α1 of the LED 16 toward the colored tube or colored cover of the incandescent bulb 15.

The emitted light α1 of the LED 16 is reflected by the second reflector 41 and is emitted from the passage area 19 through the diffusion step 22 toward the front of the vehicle from the front cover 13 and includes a light shielding wall 43. It is not affected by 15 colored colors.
An optical control member such as a Fresnel lens may be provided in the passage area 19. Further, the light shielding wall 43 may be provided with a light shielding member that is a separate member from the second reflector 41.

  In addition, this invention is not limited to embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably. In addition, the material, shape, dimension, numerical value, form, number, arrangement location, and the like of each component in the above-described embodiment are arbitrary and are not limited as long as the present invention can be achieved.

  For example, as a combination of the first light emitting function and the second light emitting function, a fog lamp, a clearance lamp, a tail lamp, a backup lamp, a rear fog lamp, and the like can be appropriately applied. Therefore, it goes without saying that the vehicular lamp can be applied to a rear combination lamp or the like instead of the front turn signal lamp unit.

10, 30, 40 Vehicle lamp 11 Lamp body 12 First reflector 13 Front cover 14 Light chamber 15 Incandescent light bulb (first light source)
16 LED (second light source)
17 1st reflection area 19 Passing area 20, 41 2nd reflector 21, 42 2nd reflection area 25 LED board (board | substrate)
26 Heat dissipation member 32, 43 Light shielding wall (light shielding part)

Claims (5)

In the lamp chamber formed by the lamp body with the front opening and the front cover attached to the front opening,
A first light source;
A first reflector that reflects light from the first light source forward;
A second light source disposed behind the first reflector;
A vehicular lamp comprising:
The first light source and the second light source have different light emitting functions,
The vehicular lamp according to claim 1, wherein the first reflector includes a passing area for irradiating light from the second light source forward. The second light source is reflected forward by a second reflector disposed in the vicinity of the first reflector,
2. The vehicular lamp according to claim 1, wherein at least one of the first reflector and the second reflector has a heat radiating member opened rearward, and the substrate is fixed to the heat radiating member. . The first light source is a light source that emits light through a colored tube or a colored cover,
3. The vehicle according to claim 2, wherein a light shielding portion that shields light from the second light source toward the colored tube or the colored cover is formed between the second light source and the passage region. Lamps.   The vehicular lamp according to any one of claims 1 to 3, wherein the first reflector includes an optical control member in the passage region. 5. The vehicular lamp according to claim 1, wherein only one of the first light source and the second light source is turned on.

Images