JP2007035371A - Lamp for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lamp for vehicle not requiring high precision for assembly and with great freedom in design. <P>SOLUTION: The lamp for the vehicle consists of one incandescent light bulb which is a light source, a reflector, an inner lens and a covering lens. The reflector is composed of a reflecting part in a position inserted into direct light from the incandescent light bulb and reflecting the light to a side in the irradiated direction by the lamp for the vehicle and a non-reflecting part provided in a position not reached by the direct light from the incandescent light bulb and not producing reflected light. The inner lens is provided with light emitting parts corresponding to each of the reflecting parts. The structure is simplified in the lamp for the vehicle so that the light from each of the light emitting parts are observed as independent points by being transmitted through the cover lens. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a vehicular lamp, and particularly relates to a configuration of a vehicular lamp for a signal that emits light in a relatively wide range.

  The configuration of the vehicular lamp 90 for obtaining a plurality of light emission patterns such as dots from a conventional incandescent light source includes those shown in FIG. 3 and FIG. In the reflecting mirror 92 located at the center, a spheroid ellipsoid O having the filament 91a of the incandescent bulb 91 as the first focal point and the second focal point in the vicinity of the light shielding film 93 is formed radially.

  A plurality of shapes are prepared for the spheroid O, and each of the spheroids has a second focal point f2 in the vicinity of the light-shielding film 93, but has a long axis Z approaching the light-shielding film 93. The inclination is different. By doing in this way, the transmitted light 93a is provided corresponding to the position of the second focal point provided in the vicinity of the light shielding film 93 of each major axis Z.

  Therefore, the image of the filament 91a formed at the second focal point passes through the transmitted light 93a and reaches the front lens 94, and is appropriately diffused by the lens cut 94a provided on the front lens 94 to be viewed by the viewer. Will be reached. This state is shown in FIG. 4, and the light from one incandescent light bulb is viewed by a viewer to see a novel lighting state having a pattern in which a plurality of point-like lights 95 are arranged substantially concentrically. It becomes possible to make it.

The vehicular lamp 90 is provided with two types of lighting methods, and the other lighting method includes an LED lamp that emits light upward in the center of the light shielding film 93, and further above it is approximately above. Light is diffused in a flat 360 ° range with a conical reflector and this light is directed to the irradiation direction with a substantially triangular reflector, but the light source is not an incandescent light bulb for this part. Therefore, the detailed description here is omitted.
JP 2001-307518 A

  However, in the vehicular lamp 90 having the above-described conventional configuration, the incandescent lamp 91 installed at the center is surrounded by a spheroid reflecting mirror having an open upper portion, so that the light flux supplement rate with respect to the filament 91a is reduced. In order to obtain a bright vehicular lamp, a bright incandescent light bulb with high power consumption must be adopted, which causes a problem that power consumption increases and heat generation also increases.

  In addition, considerable accuracy is required for the alignment between the second focal point and the transmitted light 93a provided on the light shielding film 93. If assembly is performed in a shifted state, the light is transmitted to the front lens 94 side. Since the amount of light to be reduced is drastically reduced, high accuracy is required for assembly work, which causes problems in productivity and cost.

  In addition, from the configuration described above, it is difficult to obtain an external shape of the vehicular lamp 90 other than a circular shape. For example, it may be a free shape according to the shape of the vehicle body of the current automobile. This is incompatible with the usual design flow, and there is a problem that the degree of freedom is insufficient even in the design aspect for realizing such various designs.

  The present invention is a vehicle lamp comprising a single incandescent bulb as a light source, a reflector, an inner lens, and a cover lens as specific means for solving the above-described conventional problems. A reflection portion provided at a position to be inserted into the direct light from the incandescent light bulb and appropriately converging and reflecting the light from the incandescent light bulb on the irradiation direction side of the vehicular lamp; and the direct light from the incandescent light bulb Non-reflective portions that are provided at positions where light does not reach or are parallel to the direct light and do not generate reflected light are alternately configured in a plurality of stages in the horizontal direction. The lens cut corresponding to each of the reflection parts is provided, and the light from the reflection part is radiated and viewed as an independent dot shape through the cover lens. By providing a vehicular lamp characterized by the fact that it does not require high accuracy for assembly, it solves the problem as a design with a high degree of freedom in design. .

  According to the present invention, for example, a tail lamp having a flexible shape in accordance with the shape of the vehicle body can be obtained by reflecting a plurality of light from one incandescent bulb in a row or the like in an irradiation direction at an arbitrary position using a reflector. As a result, the degree of freedom of design with respect to the design in the vehicle is increased, and a single incandescent bulb is sufficient. Therefore, it is possible to simplify the configuration, for example, by eliminating the trouble of wiring a large number of LED lamps at predetermined positions.

  Below, this invention is demonstrated in detail based on embodiment shown in a figure. 1 is a front view of a vehicular lamp 1 according to the present invention as seen from the light emitting surface side, and FIG. 2 is a cross-sectional view taken along the line AA of FIG. The cut surface is set so as to pass through the incandescent bulb 2.

  Here, in the vehicular lamp 1 of the present invention, as described above, in principle, one incandescent bulb 2 is adopted as the light source of one vehicular lamp 1, and this one incandescent lamp is used. As shown in the front view of FIG. 1, the light bulb 2 has a configuration in which a plurality of light-emitting points 4 that shine as dots are generated in, for example, vertical and horizontal rows on the surface of the lens 3 of the vehicular lamp 1.

  First, with reference to FIG. 2, an example of a configuration when the light emitting point 4 is formed will be described. First, for one incandescent bulb 2, a reflecting portion 5a and a non-reflecting portion 5b are formed. A reflector 5 is provided. The reflector 5 is formed on at least the inner surface side so as to be able to efficiently reflect the light from the incandescent bulb 2, that is, the filament 2a, by performing a mirror surface treatment such as aluminum vapor deposition. .

  Here, if the mutual relationship between the incandescent light bulb 2 and the reflecting portion 5a and the non-reflecting portion 5b is described, the incandescent light bulb 2 has the filament 2a, preferably set at a substantially central position of the reflector 5. Has been. And the part used as the reflection part 5a of the said reflector 5 is emitted from the said filament 2a, and reflects the light which reaches the said reflection part toward the irradiation direction of this vehicle lamp 1. As shown in FIG.

  On the other hand, the non-reflective portion 5b is formed in a direction parallel to the light emitted from the filament 2a or in a direction to open. Accordingly, the light emitted from the filament 2a does not come into contact with the non-reflecting surface 5b, and therefore the non-reflecting surface 5b does not generate reflected light.

  Therefore, if the reflecting portion 5a is formed on the reflector 5 so as to have a desired shape such as a vertical and horizontal shape, a round shape, a star shape, and the other portion is used as the non-reflecting portion 5b, the reflector 5 shines in a desired shape during lighting. The vehicular lamp 1 is obtained.

  Next, if the configuration of the reflecting portion 5a is described in more detail, as is clear from FIG. 2, each reflecting portion 5a exists at a different distance from the incandescent lamp 2 (filament 2a). Therefore, the reflected light is brighter as the reflecting portion 5a is closer to the incandescent bulb 2, but the image of the filament 2a projected on the other side is smaller, and conversely, the reflected light from the reflecting portion 5a far from the incandescent bulb 2 is reflected. Is dark, but the filament 2a image becomes larger.

  Therefore, in the present invention, the reflecting portion 5a located close to the incandescent bulb 2 is formed to have a small curvature, a short focal point in the case of an optical lens, and to set a magnification of the projected image to be large. The reflecting portion 5a located far from the incandescent bulb 2 is formed with a large curvature and is set so that the enlargement ratio of the projected image is small. As a whole, the filament 2a image of substantially the same size is formed on the reflector 5 It is supposed to be projected onto the covering inner lens 6.

  At the same time, the reflective portion 5a located near the incandescent bulb 2 is formed as a small area, and the reflective portion 5a located far from the incandescent bulb 2 is formed as a large (wide) area. When projected onto the inner lens 6 covering 5, the same brightness is obtained.

  Then, at a predetermined position on the inner lens 6 where the reflected light reaches the reflecting portion 5a of the reflector 5, for example, a polyhedral prism cut is applied to form a light emitting point 4, and the vehicle lamp 1 When the lighting is performed, the light emitting points 4 by the lighting are approximately uniform in size and shine as uniform brightness.

  Here, in the present invention, the incandescent bulb 2 also constitutes one of the light emitting points 4. In this case, the direct light from the filament in the irradiation direction reaches the light emitting point 4 of the inner lens 6 directly. For example, it is preferable to adjust the polyhedral prism cut applied to this portion to balance the brightness with other portions.

  Note that the above is only a description of means for forming the brightness of each light emitting point 4 to be uniform. For example, it is effective to change the brightness, size, etc. partially depending on the vehicle design. There may be cases. In such a case, the object can be achieved by providing brightness and darkness in the display by means opposite to the means for making uniform.

  By using the vehicular lamp 1 having the above-described configuration according to the present invention, there is provided a vehicular lamp in which a light emitting point 4 is arranged in a free shape and a light emitting pattern capable of giving a viewer a novel feeling is obtained. As in the prior art, it can be obtained by simply inserting and mounting a single lamp without wiring a large number of LED lamps, and the configuration can be simplified.

  In addition, according to the present invention, the reflector 5 is provided with the reflecting portion 5a and the non-reflecting portion 5b to form the light emitting point 4, so that each light emitting point can be adjusted by adjusting the curvature and area of each reflecting portion 5a. The brightness uniformity of 4 can be adjusted freely, and incandescent bulbs are not only light-emitting colors, but also have a wide range of choices for power consumption (brightness). It can be applied.

It is a front view showing an embodiment of a vehicular lamp according to the present invention. It is sectional drawing which follows the AA line of FIG. It is sectional drawing which shows the structure of a prior art example. It is explanatory drawing which shows the lighting state of a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Vehicle lamp 2 ... Incandescent light bulb 2a ... Filament 3 ... Lens 4 ... Light emission point 5 ... Reflector 5a ... Reflection part 5b ... Non-reflection part 6 ... Inner lens 7 ... Cover lens

Claims (4)

  A vehicle lamp comprising a single incandescent bulb as a light source, a reflector, an inner lens, and a cover lens. The reflector is provided at a position to be inserted into direct light from the incandescent bulb. A reflection part that appropriately converges and reflects the light from the light bulb on the irradiation direction side of the vehicle lamp, and a position where the direct light from the incandescent light bulb does not reach or a position parallel to the direct light. Non-reflective portions that do not generate reflected light are alternately configured in a plurality of stages in the horizontal direction, and the inner lens is provided with lens cuts corresponding to the respective reflective portions, and the cover A vehicular lamp characterized by having a configuration in which light from the reflection portion is shining and viewed as an independent point when transmitted through a lens.   The curvature of the reflection part is adjusted according to the distance from the light source, and the size of the image of the projected light source is set to be substantially the same as that from each reflection part. The vehicular lamp according to claim 1.   The area of the reflection part is adjusted according to the distance from the light source, and the amount of light projected in the irradiation direction is set so that the amount of light from each reflection part is substantially the same. The vehicular lamp according to claim 1, wherein the vehicular lamp is characterized by the following.   The lens cut is provided at a position corresponding to the light source of the inner lens so that direct light from the light source is viewed as a point substantially similar to the light reflected by the reflecting portion. The vehicular lamp according to any one of claims 1 to 3.

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