JPH0234722Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a turn signal lamp that is used by being attached to a corner of a vehicle such as an automobile.

[Prior Art] Generally, this type of lamp is often used adjacent to another head lamp or stop lamp, and its main structure is as follows:
It consists of a reflector having a paraboloid and one rising wall, a front lens, and a light source,
The lamp A having such a structure is attached to each corner of the vehicle B at the front and rear, as shown in FIG.

In the case of this type of turn signal lamp, it is necessary to light it in a manner that is most easily visible to other vehicles (particularly two-wheeled vehicles) for safe driving, so it is desirable to have a diffused light distribution that is as wide as possible. In Japan, the diffused light is required to spread 10 degrees vertically and 20 degrees horizontally, but in Europe, as shown in Figure 5 above, to
Since a spread of 45° and 80° is required, the front lens used must have a lens cut that requires a very large divergence angle.

[Problems to be Solved by the Invention] However, as described above, the diffused light distribution is achieved by the lens cut, but there is a problem in that it is difficult to make the lens cut wider than this. In addition, when used adjacent to a head lamp or stop lamp that uses a lens with a shallow lens cut or no lens cut at all, there is a problem in that there is no continuity between the two, creating a sense of discomfort and impairing the overall design of the vehicle. It also has points.

[Means for Solving the Problems] As a specific means for solving the above problems, the present invention provides a turn signal lamp comprising a reflector having a paraboloid and one rising wall, a front lens, and a light source. In the above, the paraboloid is a composite reflecting surface formed by a plurality of parabolic cylindrical surfaces that are divided along a substantially vertical direction and whose vertical cross section is a parabola, and the rising wall is divided along a substantially vertical direction and whose horizontal cross section is a circular arc. A turn signal lamp characterized in that it has a plurality of cylindrical reflective surfaces, and the composite reflective surface and the cylindrical reflective surface already diffuse the reflected light from the light source. Since the amount of light may be small or almost non-existent, sufficient diffused light can be obtained even with almost no lens cut on the front lens.

[Example] Next, the present invention will be described in more detail with reference to the illustrated embodiment. Reference numeral 1 is a turn signal lamp that is attached to a corner of a vehicle B such as an automobile, and other lamps such as a head lamp or a stop lamp are used. It is installed in a series adjacent to the lamp C. This turn signal lamp 1 includes a reflector 2, a front lens 3,
The reflector 2 is composed of a paraboloid 2a and a rising wall 2b with one side rising up.

A light bulb insertion hole 5 is provided approximately at the center of the paraboloid 2a constituting the reflector 2, and a light bulb 4 serving as a light source is attached to the insertion hole via a socket 6. Further, the inner side of the parabolic surface 2a, that is, the reflective surface side, is formed into a plurality of parabolic cylindrical surfaces 7 that are divided along the substantially vertical direction and whose vertical cross section is a parabola, and the reflective surface of the rising wall 2b is formed in the substantially vertical direction. It is formed into a plurality of cylindrical reflecting surfaces 8 which are divided along the horizontal cross section and have circular arcs. The full-surface lens 3 may be cut or uncut according to need or by cutting the lens of the adjacent lamp C.

[Function] In the turn signal lamp of the present invention having the above configuration, the state of reflection of light from the light source will be explained with reference to FIG. The irradiated direct light a and the parabolic cylindrical surface 7 of the parabolic surface 2a
There is a reflected light b that is reflected by the rising wall 2b, and a reflected light c that is reflected by the cylindrical reflective surface 8 of the rising wall 2b.The direct light a becomes irradiation light that spreads over the entire area of the front lens 3. If a lens cut for diffusion is provided, the direct light becomes irradiated light with further spread. Since the parabolic cylinder surface 7 has a vertical cross section of a parabola, the reflected light b reflected by the parabolic cylinder surface 7 is parallel light in the vertical direction and moderately diffused in the horizontal direction. The illuminance is increased by being irradiated almost to the front side and superimposed with the irradiation light directed toward the front side of the direct light a, and the reflected light c reflected by the cylindrical reflecting surface 8 of the rising wall 2b is reflected by the above-mentioned beam whose horizontal cross section is an arc. By reflecting on the cylindrical reflective surface 8,
The irradiation light is more strongly diffused in the horizontal direction and goes substantially toward the side, and is superimposed on the irradiation light that is irradiated on the side of the direct light a to increase its illuminance. Therefore, the light emitted from the light source is
A part of the light is emitted as direct light with an appropriate spread, and a part of the light is emitted as diffused light that has already been diffused inside by the reflector. The light is diffused over a wide angle, and the lamp has sufficient visibility even without a special lens cut for diffusion on the front lens 3. In this case, if the lamp C installed adjacent to the lamp has a lens cut on its front lens, an appropriate diffusion lens cut can be applied accordingly, and if the lens of lamp C does not have a lens cut. In such a case, the front lens 3 may be used without making any cuts. In any case, the required diffused light can easily be obtained even by using front lenses that match the adjacent lamps.

[Effect of the invention] As explained above, the turn signal lamp according to the invention uses a reflector having a rising wall with one side of a paraboloid raised up, and the paraboloid is divided along a substantially vertical direction. The light source is Since the reflected light is already diffused within the lamp by the composite reflecting surface and the cylindrical reflecting surface, there is no need for a large diffusion angle in the front lens, and a complicated lens cut for diffusion is not required. It has an excellent effect in that it does not require any additional treatment.

In addition, since there is no need for a lens cut to diffuse the irradiated light, any front lens can be used, and it can be selected appropriately to match the lenses of the adjacent lamps, giving a sense of unity to each other in the adjacent state. This has the excellent effect of not only making it possible to create a new design, but also eliminating any sense of incongruity in the overall design of the vehicle.

Furthermore, there is no need to make a special lens cut on the front lens, so even if the lens of a headlamp is tilted, for example, and the front lens is formed to match the tilted headlamp lens, there will be no need to cut the lens to the left or right, which normally occurs. Not only does the sagging phenomenon of light not occur at all, but it also has the excellent effect of being able to obtain a satisfactory and appropriate light distribution.

[Brief explanation of the drawing]

Fig. 1 is a partial perspective view showing the turn signal lamp of the present invention installed in a vehicle such as an automobile, Fig. 2 is an enlarged sectional view taken along the line ~ in Fig. 4 is a schematic sectional view showing the reflection state of the reflector used in the present invention, and FIG. 5 is a schematic sectional view of a vehicle showing the irradiation angle of a conventional turn signal lamp. FIG. 1... Turn signal lamp, 2... Reflector, 2a... Paraboloid, 2b... Rising wall,
3...Front lens, 4...Light bulb as a light source, 5...
...insertion hole, 6...socket, 7...parabolic cylinder surface, 8
...Cylindrical reflective surface.

Claims (1)

[Scope of utility model registration request] In a turn signal lamp consisting of a reflector having a paraboloid and one rising wall, a front lens, and a light source, the paraboloid is divided along a substantially vertical direction and has a plurality of parabolic columns whose vertical cross section is a parabola. A turn signal lamp characterized in that the rising wall is divided along a substantially vertical direction to form a plurality of cylindrical reflecting surfaces each having a horizontal cross section having a circular arc.