JPH02117001A - Diffusing-type alarm lamp - Google Patents

Abstract

PURPOSE:To obtain a diffusing-type alarm lamp reduced in size and having small air resistance during traveling by constituting a diffusing radiating portion of a rotary elliptic reflecting surface, a light source placed at the first focus of the surface and a projection lens whose focus is positioned at a second focus of the rotary elliptic reflecting surface. CONSTITUTION:A reflecting mirror 9 fixed on a base 8 is opened forward, with its reflecting surface 10 exhibiting a rotary ellipse. A lamp 11 is supported at a rear summit of the reflecting mirror, and a filament 12 is located at a first focus F1 of the reflecting surface 10. Light 13, 13,... emitted from the filament 12 and reflected by the reflecting mirror 10 is therefore focused at a second focus F2 of the reflecting surface 10. A projection lens 14 supported on the base 8 so that it is located in front of the reflecting mirror 9 is formed like a fresnel lens, and the focus Fc of the projection lens 14 is located at the second focus F2 of the reflecting mirror 10. This permits a lamp to be reduced in size and air resistance during traveling without decreasing the number of utilized light beams.

Description

Detailed Description of the Invention The diffused light warning lamp of the present invention will be explained in accordance with the following items A. Field of use in business B0 Summary of the invention C0 Prior art [Figures 8 and 9] D6 Problems to be solved by the invention [Figures 8 and 9] E2 Means F for solving the problem, Example [Figures 1 to 7] F-1, First embodiment [Figures 1 to 3] a, Globe, base, etc., diffuser unit F-2, second embodiment [Figs. 4 to 7] G3 Effects of the invention (A, industrial application field) The present invention relates to a novel diffuser type warning light. Specifically, the present invention aims to provide a novel diffused light warning light that can be made smaller in overall shape, particularly in the height direction, and that reduces air resistance during high-speed driving.

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(B. Summary of the Invention) The diffused light type warning light of the present invention includes a diffused light irradiation unit, a spheroidal reflecting surface, a light source disposed at its first focal point, and a spheroidal reflecting surface arranged on the opening side of the spheroidal reflecting surface, the focal point being rotated. It is constructed by combining an elliptical reflective surface with a projection lens located at the second focal point. Therefore, the usable solid angle of the light source is increased compared to the aperture of the reflective surface, and the luminous flux is the same as that of the conventional method. If the number is ensured, the diameter of the reflecting surface becomes smaller, which makes it possible to make the overall shape smaller, especially in the height direction, and to reduce air resistance.

(C, Prior Art) [Figs. 8 and 9] Figs. 8 and 9 show an example a of a conventional diffused light warning light.

b is a glove mounted on the roof of an automobile, and is formed into a cylindrical shape from transparent synthetic resin.

C is a light scattering unit placed inside the globe b.

d is a reflecting section, and two reflecting mirrors a and e are connected back to back. The reflecting surfaces f, f of these reflecting mirrors e, e have a paraboloid of revolution shape, and are connected so that their focal points are at a common point.

g is a light bulb, and its filament h is the reflective surface f,
It is located at the focal point of f. Therefore, the light emitted from the filament h and reflected by the reflecting surfaces f and f is irradiated as a parallel beam of light.

i is a rotating plate, and the reflecting portion d is placed on the rotating plate 1. Therefore, when the rotating plate i rotates, the reflecting part d
rotates and the orientation of the openings of its reflective surfaces f, f sequentially changes in the rotational direction, so the light irradiated by the diffuser unit C rotates and is visible to those around the diffuser warning light a. can do.

(D. Problem to be Solved by the Invention) [Figures 8 and 9] Even in the above-mentioned conventional diffused-light warning light a, the cross section of the outer shape taken along the running direction of the automobile is long in the front and rear direction. The elliptical shape is designed to minimize the height of the vehicle's protrusion from the roof of the vehicle to reduce air resistance during driving.

However, there is a strong demand for further reducing air resistance during high-speed running.

Therefore, it is conceivable to further reduce the height of the glove b to reduce the air resistance during running.

However, if the diameter of the aperture is made small using the conventional paraboloid-shaped reflecting surfaces f and f, the solid angle used by the light source will be significantly reduced, the number of luminous fluxes used will be reduced, and the warning effect due to diffused light will be reduced. The problem is that it is decreasing.

(E. Means for Solving the Problems) In order to solve the above-mentioned problems, the diffused warning light of the present invention has a reflecting mirror disposed inside the globe whose reflecting surface is shaped like a spheroid, and the reflecting surface has a circular shape. A light source is disposed at one focal point, and a light projecting lens whose focal point is located at the second focal point of the spheroidal reflecting surface is further provided.

Therefore, in the present invention, since the usable solid angle of the light source can be greatly increased, the number of usable luminous flux does not decrease even when downsized, and the air resistance while driving is reduced. A small diffused warning light can be provided.

(F. Embodiment) [FIGS. 1 to 7] Details of the diffused light warning lamp of the present invention will be described below according to the illustrated embodiments.

(F-1, First Embodiment) [Figs. 1 to 3] Figs. 1 to 3 show the first embodiment 1 of the diffused light type warning light of the present invention.

(a, glove, base, etc.) 2 is a base, and the base 2 is fixed to the roof of the automobile.

A glove 3.3 is made of a transparent synthetic resin and is fixed on the base 2. These gloves 3.3 have a substantially elliptical cylindrical shape with long elliptical sleeves extending in the front-rear direction, and both ends thereof are closed.

4.4 is a speaker attached between two gloves 3 and 3 on the base 2, and is covered by a cover 6 in which a large number of sound emitting holes 5.5, . . . are formed.

(b, Diffusion Unit) 7 is a light scattering unit disposed within the globe 3, and a similar light scattering unit is disposed within the other globe 3 as well.

Reference numeral 8 denotes a substrate detachably supported within the glove 3 by means not shown.

Reference numeral 9 denotes a reflecting mirror fixed on the substrate 8, and is open toward the front. The reflecting surface 10 of the reflecting mirror 9 has a spheroidal shape.

A light bulb 11 is supported at the rear top of the reflecting mirror 9, and its filament 12 is located at the first focal point F1 of the reflecting surface 10. Therefore, the light 13.13, which is emitted from the filament 12 and reflected by the reflective surface 10,...
is condensed at the second focal point F2 of the reflective surface 10.

Reference numeral 14 denotes a light projecting lens supported by the substrate 8 so as to be disposed in front of the reflector 1j9, and is formed in the shape of a Fresnel lens. The focal point FC of the light projection lens 14 is located at the second focal point F2 of the reflective surface 10.

Therefore, the above-mentioned light 13.13, . . .
The beam is irradiated forward as a substantially parallel beam of light.

Incidentally, the reflecting mirror 9 and the projection lens 14 may be provided with a rotary plate that rotates with respect to the substrate 8, and placed on the rotary plate.

(F-2, Second Embodiment) [Figs. 4 to 7] Figs. 4 to 7 show a second embodiment 15 of the diffused light type warning light of the present invention.

The second embodiment 15 differs from the first embodiment 1 only in the light scattering unit, and the other parts are different from the first embodiment 1.
Since this part is the same as that in the first embodiment, the same reference numerals as those given to similar parts in the first embodiment will be given to this part, and the explanation thereof will be omitted.

16 is a light scattering unit, and 17 is its substrate. The substrate 17 is detachably mounted inside the glove 3.

18 is a rotating plate, and an insertion hole 19 is formed in the center thereof. The rotating plate 18 is rotatably supported by the substrate 17.

Reference numeral 20 denotes a motor with a speed reducer fixed to the substrate 17, and a friction wheel 21 is fixed to the output shaft 20a of the motor 20, and the outer peripheral surface of the friction wheel 21 is pressed against the outer peripheral surface of the rotating plate 18. ing. Therefore, when the motor 20 rotates, the rotation is received via the friction wheel 21 and the rotating plate 18 is rotated.

Reference numeral 22 denotes a reflecting section, which is made up of two reflecting mirrors 23, 23 connected back to back. Each reflector 23.23 is provided with a spheroidal reflecting surface 24.24, and each reflector 23.2
The rear apex of 3 is cut off, and the rear opening edges formed by the ribs are joined together in a butt-like manner, and each reflective surface 24.2
The first focal points of the four lenses are arranged at a common point F1.

An insertion hole 25 is formed at the lower end of the connecting portion of the two reflecting mirrors 23.23 of the reflection section 22.
The reflecting portion 22 is fixed to the upper surface of the rotary plate 18 in a state where it faces the insertion hole 19 of the rotary plate 18 from above.

Reference numeral 26 denotes a light bulb, which is supported by a light bulb support part 27 that is erected from the substrate 17 and inserted through the insertion hole 19 of the rotating plate 18.The light bulb 26 is also inserted into the insertion hole 25 of the reflection part 22 so that its filament 28 are located at a common first focus Fl of the reflective surfaces 24.24.

2 and 29 are projecting lenses that cover the openings of the two reflecting mirrors 23.23, and are formed in the shape of Fresnel lenses, and their focal points Fc and Fc are the second focal points F2 and F of the reflecting surfaces 24.24.
2 are located separately.

Thus, all of the light 30.30, . Focus on F2,
Further, the light is emitted as a parallel light beam by the projecting lenses 29 and 29.

It is possible to provide a diffused warning light that does not reduce the number of luminous fluxes used, is miniaturized, and has low air resistance while driving.

In addition, in the above-mentioned embodiment, only a diffuser unit was provided inside the glove, but this does not mean that the diffuser type warning light of the present invention is limited to such a type; Something other than the light scattering unit may be provided.

(G. Effects of the Invention) As is clear from the above description, the diffused warning light of the present invention includes a light-transmitting globe mounted on the roof of a vehicle, and a rotating elliptical shape disposed within the globe. a reflective surface,
A light source disposed at a first focal point of the spheroidal reflecting surface; and a light projection lens disposed on the opening side of the spheroidal reflecting surface and having a focal point located at a second focal point of the spheroidal reflecting surface. It is characterized by

Therefore, in the present invention, since the usable solid angle of the light source can be increased, even if the light source is miniaturized,

[Brief explanation of the drawing]

1 to 3 show a first embodiment of the diffused light warning lamp of the present invention, in which FIG. 1 is a perspective view, FIG. 2 is an exploded perspective view,
Figure 3 is an enlarged sectional view of the main parts, Figures 4 to 7 show a second embodiment of the diffused warning light of the present invention, Figure 4 is an exploded perspective view, and Figure 5 is the main parts. Fig. 6 is an enlarged longitudinal sectional view of the main part, Fig. 7 is an enlarged horizontal sectional view of the main part, and Figs. 8 and 9 show an example of a conventional diffused warning light. , FIG. 8 is a perspective view, and FIG. 9 is an enlarged sectional view of the main part. Explanation of symbols 1...Diffuse warning light, 3...Glove, 10.
...Spheroidal reflecting surface, 12...Light source, 14...Light projection lens, F,...
・First focal point of the spheroidal reflecting surface, F2...Second focal point of the spheroidal reflecting surface, FC...Focus of the projection lens, ]5...Diffusion warning light, 24...Rotation elliptical reflective surface, 28... light source, 29... light projection lens, F,
...First focal point of the spheroidal reflecting surface, F2 ...Second focal point of the spheroidal reflecting surface, FC...Focus of the projection lens Figure (conventional fil) Figure

Claims (1)

[Scope of Claims] A translucent globe mounted on the roof of a vehicle; a spheroidal reflective surface disposed within the globe; and a light source disposed at a first focal point of the spheroidal reflective surface. , a diffused light warning light comprising: a projection lens disposed on the opening side of the spheroidal reflecting surface and having a focal point located at a second focal point of the spheroidal reflecting surface;