JP2006221848A - Vehicular lighting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicular lighting device that has a structure in which a desired light distribution characteristic can be obtained easily and a bulb and its socket part are not exposed, while a clear lens is adopted. <P>SOLUTION: The reflector 4 includes a first reflector part 41 in which a light emitting bulb 3 is arranged at the center and which has a single paraboloid shaped reflecting face at the circumference of the center, and a second reflector part 42 which has reflecting faces at the circumference of the first reflector part 41, wherein the second reflector part 42 is a multi-reflector provided with a light distribution function including numerous cut faces. An intermediate lens 5 that is applied with lens cut is supported by a pair of right and left arm members 6 at a position opposing to the first reflector part 41 between a clear lens 2 and the light emitting bulb 3. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a vehicular lamp, and more particularly to a vehicular lamp suitable for a headlamp.

  The vehicle is equipped with various lighting devices such as a headlight, a taillight, a brake light, and a direction indicator light, and these vehicle lighting devices are required to have an excellent aesthetics with high light projecting efficiency and visibility. In Patent Document 1, the lens of the direction indicator lamp (winker lamp) is a clear lens only at the central part facing the bulb, and a lens cut is performed around the lens to provide a blinding function as well as a scattering function, thereby achieving high light projection efficiency. And a technique that balances aesthetics.

On the other hand, since the headlamp is mounted on the front of the vehicle, it not only has a great influence on aesthetics and design, but also requires sufficient consideration for the light distribution characteristics due to the large amount of light. In conventional headlamps, the reflector (reflector) has a single parabolic shape, and the front lens is processed to adjust the light distribution characteristics. On the other hand, a structure in which a front lens is a clear lens and a multi-reflector having a large number of cut surfaces and free-form surfaces is adopted as a reflector to adjust the light distribution characteristics has been proposed.
Japanese Patent Publication No. 3580516

  However, in a conventional headlamp configured by combining a clear lens and a multi-reflector, the light distribution characteristic must be adjusted only by the cut surface and curvature of the multi-reflector, so that a desired light distribution characteristic can be obtained. was difficult. Moreover, in the above-mentioned conventional headlamp, since the bulb and the socket portion thereof are exposed, there is a technical problem that the aesthetic appearance is impaired.

  The object of the present invention is to solve the above-mentioned problems of the prior art, easily obtain a desired light distribution characteristic while adopting a clear lens, and the bulb and its socket part are not exposed, and it is aesthetically pleasing. The object is to provide a vehicular lamp having an excellent structure.

In order to achieve the above-described object, the present invention is characterized in that the following measures are taken in a vehicle lighting device including a light emitting bulb, a reflector, and a lens.
(1) The reflector includes a first reflector portion having a reflective surface around a light emitting bulb, and a second reflector portion having a reflective surface around the first reflector portion, and the second reflector portion is a multi-reflector. And the lens includes a first lens part that transmits the reflected light of the first reflector part and a second lens part that transmits the reflected light of the second reflector part, and the lens cut is formed in the first lens part. It is characterized by being given.
(2) The lens is configured by stacking a first lens portion on the inner side and a second lens portion on the outer side in the optical axis direction, and the second lens portion is a clear lens.
(3) The lens has a single structure, and a second lens portion is formed around the first lens portion.
(4) The first lens is further supported by its left and right ends, and further includes an arm member substantially parallel to the optical axis.
(5) A blindfold panel is arranged around the second reflector, and the blindfold panel and the arm member are fastened together with the reflector.

According to the present invention, the following effects are achieved.
(1) According to the first aspect of the present invention, the light distribution formed by the reflecting surface of the second reflector (multi-reflector) and the light incident on the first lens (cut lens) through the first reflector are formed. Since the light distribution characteristics from the light source can be adjusted separately by the light distribution, the adjustment range of the light distribution as a whole lamp is widened, and as a result, appropriate light distribution adjustment according to the desired light distribution characteristics can be easily performed become.
(2) According to the invention of claim 2, it is possible to adjust the light distribution independently of the light distribution characteristic by the second reflector by simply replacing the first lens (cut lens). That is, according to the present invention, for example, the main light distribution characteristic is formed by the second reflector, and fine light distribution adjustment that is difficult to be performed by the second reflector can be performed by the light distribution characteristic of the first lens. . In the present invention, the first lens is disposed in front of the light source in the optical axis direction and at a position facing the light source. For this reason, according to the present invention, the light emitting bulb can be blinded (not easily visible from the outside) while adopting a clear lens that is not subjected to lens cutting.
(3) According to the invention of claim 3, the number of parts can be reduced because a single lens that forms different light distributions can be formed.
(4) According to the invention of claim 4, the arm portion for supporting the first lens at the left and right ends is made substantially parallel to the optical axis (so as to be thin when viewed from the direction orthogonal to the irradiation direction). ing. Therefore, according to the present invention, the amount of light shielded by the arm member that indicates the first lens can be minimized.
(5) According to the invention of claim 5, the number of fixing members can be reduced and the number of assembling steps can be reduced as compared with the case where the blindfold panel and the arm member are separately fixed.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. 1 is a perspective view of a first embodiment of a headlamp to which the present invention is applied, FIG. 2 is a front view thereof, FIG. 3 is a sectional view taken along line AA in FIG. 2, and FIG. FIG.

  The headlamp 1 according to the present invention mainly includes a clear lens 2, a light emitting bulb 3, and a reflector 4 that are not subjected to lens cutting, and the periphery thereof is surrounded by a front cowl 10. The reflector 4 includes a first reflector 41 having a single parabolic reflecting surface around the light emitting bulb 3 and a reflecting surface around the first reflector 41. 2 reflector portions 42. The second reflector portion 42 is a multi-reflector having a light distribution function in which a large number of cut surfaces or free-form surfaces are formed.

  Between the clear lens 2 and the light emitting bulb 3, an intermediate lens 5 with a lens cut is supported by a pair of left and right arm members 6 at a position facing the first reflector portion 41. That is, the lens according to the present embodiment is configured by overlapping the intermediate lens 5 on the inner side (light source side) and the clear lens 2 on the outer side (irradiation direction side) in the optical axis direction. In the present embodiment, since the arm member 6 supports the intermediate lens 5 in a substantially parallel posture along the optical axis, the amount of light shielded by providing the intermediate lens 5 can be minimized.

  In the headlamp 1, a position lamp 7 is disposed at a position below the light emitting bulb 3 of the second reflector portion 42. In the present embodiment, when the headlamp 1 is viewed from the front, the inner shape of the headlamp 1 and the shape of the second reflector portion 42 do not match, so the blindfold panel 8 for concealing the gap between the two is provided in the first embodiment. 2 It is arrange | positioned at the left-right upper part of the reflector part 42. As shown in FIG.

  FIG. 5 is a cross-sectional view for explaining the function of the first reflector portion 41, and the same reference numerals as those described above represent the same or equivalent portions.

  As described above, in the present embodiment, the reflector 4 is composed of two parts, and the solid angle can be freely set. Therefore, particularly with respect to the first reflector portion 41, as shown in FIG. 5, by taking a large solid angle, more reflected light can be incident on the intermediate lens 5.

  As shown in FIGS. 3 and 4, a groove 4 a formed by processing the vicinity of the edge of the reflector 4 is annularly arranged on the outer periphery of the headlamp 1. An elastic sealing member (for example, an O-ring) 91 having a substantially concave cross section is inserted into the groove 4 a, and the end 2 a of the clear lens 2 is inserted into the groove 4 a and is inserted into the sealing member 91. The sealing member 91 is in contact with the liquid and is sealed in a liquid-tight manner.

  6 is a cross-sectional view taken along line CC of FIG. 2, and the same reference numerals as those described above represent the same or equivalent parts. In the present embodiment, a rib 2c is provided on the inner side in the vicinity of the end of the clear glass 2, and a step part 4c is provided on the inner side of the reflector 4 at a position facing the rib 2c of the clear glass 2. The periphery of the blindfold panel 8 is sandwiched between the rib 2c and the stepped portion 4c.

  7 is a cross-sectional view taken along the line DD in FIG. 2, and the same reference numerals as those described above represent the same or equivalent parts. The end portions of the blindfold panel 8 and the arm member 6 are fastened and fixed together with screws 92 to the reflector 4 in a region sealed by the sealing member 91. Thus, in this embodiment, since the blindfold panel 8 and the arm member 6 are fastened together with the reflector 4, the number of fixing members is smaller than when the blindfold panel 8 and the arm member 6 are separately fixed. The number of assembly steps can be reduced.

  In the headlamp 1 having such a configuration, a part of the light beam emitted from the light emitting bulb 3 is reflected by the first reflector unit 41 and enters the intermediate lens 5, and is controlled to a desired light distribution by the intermediate lens 5. After that, the light passes through the clear lens 2 and is irradiated forward. Further, another part of the light beam emitted from the light emitting bulb 3 is controlled to a desired light distribution by the second reflector unit 42 and then enters the clear lens 2, and is transmitted through the lens as it is and irradiated forward. .

  According to the present embodiment, the light distribution characteristics can be adjusted separately by the multi-reflector 42 and the intermediate lens 5 (cut lens), so that the adjustment range of the light distribution is widened. As a result, the light distribution that matches the desired light distribution characteristics Adjustment is possible. Further, it is possible not only to adjust the light distribution by simply replacing the intermediate lens 5 but also to blind the light emitting bulb 3 and its socket portion while adopting a clear lens.

  Next, a second embodiment of the present invention will be described. In the first embodiment described above, two lenses are provided, and the two are overlapped with the intermediate lens 5 on the inner side and the clear lens 2 on the outer side in the optical axis direction. However, the present invention is limited to this. Instead, as shown in an example in the perspective view of FIG. 8, the intermediate lens 9 may be integrally formed at the center of the clear lens 2 disposed on the outside. According to the present embodiment, the number of lenses can be reduced as compared with the first embodiment described above.

It is a perspective view of 1st Embodiment of the headlamp to which this invention is applied. It is a front view of the headlamp shown in FIG. FIG. 3 is a sectional view taken along line AA in FIG. 2. It is BB sectional drawing of FIG. FIG. 6 is a cross-sectional view for explaining the function of the first reflector section 41. It is CC sectional view taken on the line of FIG. FIG. 3 is a sectional view taken along the line DD in FIG. 2. It is a perspective view of 2nd Embodiment of the headlamp to which this invention is applied.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Headlamp, 2 ... Clear lens, 2c ... Rib, 3 ... Light emission bulb, 4 ... Reflector, 4a ... Recessed part, 4c ... Step part, 5 ... Intermediate lens, 6 ... Arm member, 7 ... Position lamp, 8 ... Blindfold panel, 41 ... 1st reflector part, 42 ... 2nd reflector part, 91 ... Elastic sealing member

Claims (5)

In a vehicle lighting device composed of a light emitting bulb, a reflector and a lens,
The reflector is
A first reflector portion having a reflective surface around the light emitting bulb;
A second reflector part having a reflective surface around the first reflector part,
The second reflector portion is a multi-reflector;
The lens is
A first lens unit that transmits the reflected light of the first reflector unit;
A second lens part that transmits the reflected light of the second reflector part,
A vehicle lighting device, wherein a lens cut is applied to the first lens portion.   2. The vehicle according to claim 1, wherein the lens is configured by overlapping a first lens portion on an inner side and a second lens portion on an outer side in an optical axis direction, and the second lens portion is a clear lens. Light fixture.   2. The vehicle lighting device according to claim 1, wherein the lens has a single structure, and a second lens portion is formed around the first lens portion. 3.   The vehicle lighting device according to claim 2, further comprising an arm member that supports the first lens at its left and right ends and is substantially parallel to the optical axis. A blindfold panel is disposed around the second reflector,
The vehicle lighting device according to claim 4, wherein the blindfold panel and the arm member are fastened together with the reflector.

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