JPH0561903U - Vehicle lighting - Google Patents

Abstract

(57) [Abstract] [Purpose] To reduce the amount of forward projection of a lamp by forming a multiple reflection surface diffuse reflector portion on the inner surface of a reflector located on the side of a vehicle. In a thin vehicular lamp constructed near a side portion of a vehicle body A of an automobile, a curved diffuse reflector portion 6 is formed on one side of the reflector 2 and a multiple reflection surface diffuse reflector portion 8 is formed on the other side. The amount of projection of the lamp on the side of the vehicle body A is reduced, and the shape is configured to match the external design of the vehicle body A.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a structure of a reflector of a vehicular lamp, and more particularly to a reflective structure of a reflective lamp in which a reflector is formed on an inner surface of a lamp body.

[0002]

[Prior Art]

 As shown in FIG. 6, a vehicle lighting device such as a turn signal lamp of an automobile, which is formed on the side of the vehicle body, is formed to be thin due to the design requirements of the vehicle body, and the reflector 50 is integrally formed on the inner surface. The light source 52 is arranged such that the filament 52a is located on the front center axis CL of the lamp body 51 formed by the above, and the front of the light source 52 is airtightly covered by the front lens 53 to form the lamp chamber 54. The inner surface of the reflector 50 has a structure in which a large number of cylindrical, for example, convex diffusion steps 55, 55 extending in a predetermined direction such as a horizontal direction or a vertical direction are formed over the entire inner surface of the paraboloid of revolution. There is. Each of the diffusion steps 55, 55 ... Is formed in parallel with a curved surface having a predetermined radius at an equal pitch, and a curved surface-shaped diffusion reflector 56 is formed as a whole.

When the light source 52 is turned on, the luminous flux reflected on the curved diffuse reflector 56 is respectively diffused by the convex steps 55, 55 ... Formed on the inner surface of the curved diffuse reflector 56. The structure is such that the light is reflected at a predetermined diffusion angle, transmitted through the front lens 53, and diffused and emitted to the front of the lamp.

[0004]

[Problems to be solved by the device]

 However, in the vehicular lamp having the above-described structure, a large number of diffusion steps 55, 55, etc., such as cylindrical projections, are formed over the entire inner surface of the lamp body 50 so as to extend in the lateral direction or the vertical direction. Since the curved diffuse reflector 56 is configured, in order to efficiently diffuse the emitted light of the bulb 52 to the outside of the front lens 53 in a predetermined irradiation pattern, the lamp body 51 itself has a predetermined depth W. However, there is a problem in that there are restrictions due to the structure of the vehicle body side such as the width of the installation space when mounting on the vehicle body, especially in such a thin vehicle lamp, There has been a demand for a vehicle lighting device that has a shape and size that corresponds to the shape and structure of the vehicle body while reducing the amount of protrusion.

The present invention has been made in view of the above problems, and the inner surface of the other side of the reflector that extends in the lateral direction of the vehicle body is continuous with the curved diffuse reflector portion formed on the inner surface of the one side of the reflector. In addition, multiple reflective segments are arranged in parallel with each other for each lighting bulb that serves as a light source, and a multi-reflecting planar diffuse reflector is formed on the surface of which a cylindrical diffuse step with a curved surface with a predetermined radius is formed. However, it is an object of the present invention to obtain a predetermined light distribution by both reflector portions and at the same time form an integral step pattern between both reflector portions to improve the appearance as a vehicular lamp.

[0006]

[Means for Solving the Problems]

 In order to achieve the above object, a vehicular lamp according to the present invention includes a light source for lighting in a lamp body integrally formed with a reflector on an inner surface thereof, and a front of the light source is covered with a front lens to provide a lamp chamber. In the vehicular lamp having the above construction, a rotary parabolic curved inner surface is formed on one side of the reflector and a large number of cylindrical diffusion steps extending in a predetermined direction on the inner surface and having a curved surface of a predetermined radius are arranged in parallel. To form a curved diffuser reflector portion, and a plurality of rectangular shapes are formed on the other side of the reflector on the inner surface of the inclined plane corresponding to the forming direction of the diffusion step formed on the curved diffuser reflector portion. In addition to forming the reflective segments of the above, we also constructed a multi-reflecting planar diffuse reflector part with a cylindrical diffusion step consisting of a curved surface with a predetermined radius on the surface of each reflective segment. It is an effect.

[0007]

[Action]

 According to the above configuration, the depth of the lamp body on the side of the vehicle body that constitutes the multiple reflection surface diffuse reflector portion or the protrusion amount of the front lens can be reduced, so that the vehicle lamp has a thin structure. It is possible to deal with the structure of the vehicle body side without impairing the light distribution performance of the front lens of the front side, and the diffusion step of the multiple reflection surface diffuse reflector part and the curved diffuse reflector part side. The shape and line of the diffusion step can be matched to improve the appearance of the lamp.

[0008]

【Example】

 Hereinafter, an embodiment of a thin vehicle lighting device according to the present invention will be described with reference to the drawings. Reference numeral 1 denotes a lamp body that has a substantially rectangular shape in the lateral direction H on the front side and integrally includes a reflector 2 continuous rearward. The opening surface of the lamp body 1 is airtightly covered by a front lens 3 to form a lamp chamber 4, and a lighting bulb 5 serving as a light source is introduced from the bottom of the lamp body 1 to the front center of the diffuse reflector 2. The filament 5a is supported so as to be located at the focal point F on the axis CL. The reflector 2 has a rotation parabolic curved surface a on one side located near the center of the vehicle body A of the automobile, and in the example shown in the figure, extends laterally inward in a convex shape in the vertical direction V and has a predetermined radius. A large number of cylindrical diffusion steps 6a, 6a, ... Having R are arranged in parallel to form the curved diffusion reflector portion 6, and the curved diffusion reflector portion 6 is provided on the other side of the vehicle body A located near the side portion. A plurality of reflection segments 7, 7 ... Which are continuous and have a rectangular shape in the vertical direction V are juxtaposed in parallel with the bulb 5 in an inclined staircase form a multiple reflection surface diffuse reflector portion 8. On the surface of each of the reflective segments 7, 7 ... Constituting the multiple reflection surface diffusion reflector section 8, convex and cylindrical diffusion steps 8a, 8a ... Having a predetermined radius R are formed. The irradiation light of the bulb 5 mounted so that the filament 5a is located at the focal point F is passed through the socket 9 fixed at the central axis CL position to the respective portions of the reflector 2, that is, the curved reflector portion 6 and the multiple reflection diffusion. It is configured so as to be diffused and reflected from the reflector portion 8 in the front horizontal direction.

In the present embodiment, the large number of convex diffusion steps 6a, 6a, ... Formed on the curved reflector portion 6 are formed in the same lateral direction on the inner surface of the reflector 2 indicated by the arrow B. It has a height h1 and is formed at a uniform pitch P1 by curved surfaces extending in the longitudinal direction with the same radius R. Also, regarding the diffusion steps 8a, 8a ... Formed on the surfaces of the respective reflection segments 7, 7 ... Of the multiple reflection surface-shaped diffusion reflector portion 8, the diffusion steps 6a, 6a formed on the curved surface-shaped diffusion reflector portion 6 are also performed. Similarly, the curved surfaces extending in the vertical direction with the same radius R are formed at substantially the same pitch P2, and have the same forming height h2. Therefore, the diffusion steps 6a, 6a, ..., 8a, 8a, 8a, 8a, 8a, 8a The diffusion surfaces of ... face each other at the same level, and each diffusion angle is made constant.

The surface of each of the diffusion steps 6a, 6a, ..., 8a, 8a ... Is subjected to bright light treatment such as aluminum vapor deposition.

The front surface of the front lens 3 which is fixed to the front end portion of the lamp body 1 and seals the lamp chamber 4 accommodating the bulb 5 has an inner surface of the front lens 3 and a curved diffuse reflector portion 6 and a multiple reflection surface of the reflector 2. , 8a, 8a ... Formed in the diffused reflector portion 8 are formed in a vertical direction V by a large number of convex cylindrical spreading steps 10, 10 ... Which are orthogonal to the forming direction of the diffused steps 6a, 6a. Are formed in parallel at substantially equal pitch P3.

Therefore, the irradiation light of the bulb 5 is diffused in a desired manner by the synergistic action of the diffusion steps 6a, 6a ..., 8a, 8a ... Formed on the inner surface of the reflector 2 and the diffusion steps 10, 10 ... of the front lens 3. The light distribution pattern is formed, and the light is emitted to the outside of the front lens 3 by a uniform light distribution, and the projection amount W1 (W1 + W2 = W) of the vehicle body A toward the front side is reduced, and the shape and structure of the vehicle body A side are reduced. Can correspond to.

In the above embodiment, the diffusion steps 6a, 6a ..., 8a, 8a ... Formed on the curved diffuse reflector portion 6 and the multiple reflection surface diffuse reflector portion 8 are formed in the vertical direction V. The present invention is not limited to this, and the diffusion steps 6a, 6a ..., 8a, 8a ... Can be formed so as to extend in the lateral direction H and other directions as appropriate. It does not have to be equal. Further, the diffusion steps 10, 10 ... Formed on the inner surface of the front lens 3 have been described with reference to the embodiment having a convex cylindrical shape. However, the shape of each diffusion step 10, 10, ... Is concave. Also exhibits the same effect, and it is needless to say that the front lens 3 side may have a structure that does not necessarily require the diffusion steps 10, 10 ...

[0014]

[Effect of the device]

 Since the vehicular lamp according to the present invention is configured as described above, the diffusion angle of the reflected light flux is substantially constant by each convex diffusion step formed on the inner surface of the reflector having the paraboloid of revolution and the multiple reflection surface. As well as making the distribution of the irradiation light emitted from the front lens uniform, the shape lines of both reflectors can be matched to improve the appearance of the lamp.

Further, when the vehicular lamp according to the present invention is embodied as a lamp device for various taillights and the like in which it is necessary to form the light distribution pattern to the front of the lamp in a substantially rectangular shape, Since a diffusion angle can be formed by the diffusion steps of both the reflectors and a predetermined light distribution pattern can be obtained, excellent operational effects such as improvement in design flexibility and formability for vehicle lighting can be achieved. Is.

[Brief description of drawings]

FIG. 1 is a front view of a vehicular lamp according to the present invention.

FIG. 2 is a plan sectional view of the same.

FIG. 3 is an enlarged plan sectional view of a main part of a reflector.

FIG. 4 is a vertical sectional view of the same.

FIG. 5 is an enlarged vertical cross-sectional view of the front lens.

FIG. 6 is a plan sectional view showing a conventional vehicle lamp.

[Explanation of symbols]

 1 Lamp body 2 Reflector 3 Front lens 5 Bulb 6 Curved diffusion reflector part 6a Diffusion step 7 Reflection segment 8 Multi-reflection diffusion reflector part 8a Diffusion step 10 Front lens diffusion step A Body a Rotating parabolic surface CL Central axis

Claims (1)

[Scope of utility model registration request] 1. A vehicular lamp in which a light source for lighting is provided in a lamp body formed by integrally molding a reflector on an inner surface, and a front lens is covered with a front lens to form a lamp chamber, wherein one side of the reflector is provided. On the inner surface of the parabolic curved surface, a plurality of cylindrical diffusing steps extending in a predetermined direction on the inner surface and having a curved surface of a predetermined radius are arranged in parallel to form a curved diffusive reflector portion, and On the other side of the reflector, a plurality of reflective segments extending in a rectangular shape are formed on the inner surface of the inclined plane corresponding to the forming direction of the diffusion step formed on the curved diffusion reflector portion, and on the surface of each reflection segment. A vehicular lamp comprising a multi-reflecting planar diffuse reflector portion having a cylindrical diffusing step having a curved surface with a predetermined radius.