JPH085865Y2 - High mount stop lamp for automobile - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a stop lamp used in an automobile,
Particularly, it relates to a high mount stop lamp using an optical fiber.

[Conventional technology]

In recent automobiles, from the perspective of traffic safety, the vehicle slows down,
In order to clearly notify the following vehicle of the stopped state, many vehicles are equipped with a second stop lamp, a so-called high-mount stop lamp, at a relatively high position of the vehicle. This type of stop lamp has a configuration in which it is lit in a line shape due to the requirements of the vehicle design, the space in which it is installed, and the like. For example, a configuration in which light emitting diodes are arranged in a line is adopted.

[Problems to be solved by the device]

In the high mount stop lamp described above, the light emitting diodes are used as the light source, but a lamp in which the light emitting diodes are arranged in a row outputs a relatively thick line-shaped light beam. For this reason, it is not possible to satisfy the design requirement for obtaining an extremely thin line-shaped light beam.
Further, in order to arrange a large number of light emitting diodes in a row, a supporting circuit board is required, and the lamp becomes large,
In particular, there is a problem that the size in the vertical direction becomes large and the appearance becomes poor.

Also, when the light emitting diode deteriorates with time,
Replacing individual light emitting diodes is extremely difficult in terms of work, and therefore it is necessary to replace the entire light emitting diodes, which is also expensive.

In addition, there is a problem in that the brightness (brightness) of the light emitting diode is limited, and it is difficult to form a bright stop lamp.

An object of the present invention is to provide a high mount stop lamp for automobiles which has a thin line shape and high brightness.

[Means for solving the problem]

The high mount stop lamp of the present invention has a plurality of optical fibers, one end of which is arranged in a line and the other end of which is bundled, and the one end of the optical fiber, which is arranged so as to face each other. And a light source provided at the other end of the optical fiber for introducing light into each optical fiber.

[Action]

High-intensity light from the light source is transmitted from the other end of the optical fiber to one end arranged in a line, and emitted from this as thin line-shaped light.

〔Example〕

 Next, the present invention will be described with reference to the drawings.

FIG. 3 shows an embodiment in which the present invention is applied to a passenger vehicle, and a high mount stop lamp 3 is provided at a position above a rear window glass 2 in a vehicle interior of the vehicle 1. FIG. 1 is a longitudinal sectional view thereof, and FIG. 2 is a transverse sectional view thereof. In these drawings, reference numeral 11 denotes a lamp body, which is made of resin or the like and formed in a horizontally long box shape, and a front portion thereof is opened to form a window portion 11a. A mounting piece 12 is integrally provided on the rear surface of the lamp body 11 so as to face upward.
Is fixed to the inner panel 4 of the vehicle body supporting the rear windshield 2 with screws 15a, and the front window portion 11a is directed to the rear windshield 2 side. A rubber material 13 is fitted around the window 11a, and the lamp body 11 is elastically brought into contact with the rear window glass 2 to support the lamp body 11 itself on the rear window glass 2.

A lens holder 14 is fixed in the lamp body 11 at both ends in the lengthwise direction with screws 15b, and one end portion (emission portion) 16 of a plurality of optical fibers 16 is attached to the lens holder 14.
It holds a and the inner lens 17. Optical fiber 16
Are arranged in a line in the horizontal direction. The inner lens 17 is formed of a cylindrical lens, and its axis is aligned with the alignment direction of the optical fibers 16 at a position where the peripheral surface is separated from the one end 16a of the optical fiber 16 by a minute distance. Further, an outer lens 18 integrally formed with a cylindrical lens is integrally fixed to the front surface of the lens holder 14 in order to diffuse light in the left-right direction.

On the other hand, the other end portion of the optical fiber 16 is guided to the back of the lens holding body 14, and the other end portion of the entire optical fiber
16 are bundled in a cylindrical shape. Then, it is connected to a light source section 20 arranged in a space inside the lamp body 11 behind the lens holder 14. As shown in FIG. 4, the light source unit 20 has a transparent fiber holder 21 having a substantially spherical surface connected and supporting the other end portion (incident portion) 16b of each optical fiber 16. in this case,
The fiber holder 21 is made of heat-resistant glass, and the other end 16b of the optical fiber 16 is brought into contact with the inner surface of the fiber holder 21 while being heated, whereby the optical fiber 16 and the fiber holder 21 can be integrally welded. . In this case, it is preferable that the optical fibers 16 are bundled by a binding band 22, and the end faces of the other end portions of all the optical fibers 16 are previously machined into a shape close to a spherical surface.

L-shaped attachment pieces on both ends of the fiber holder 21.
23 is integrally provided, and the fiber holder 21 is fixed to the opening of the reflecting mirror 24 with the screw 25 by the mounting piece 23. The reflecting mirror 24 is formed in a spheroidal shape, and a bulb (bulb) 27 serving as a light source is provided in a socket 26 having a bottom portion thereof penetratingly supported.
I am wearing. Then, the light emitted from the bulb 27 is reflected by the reflecting mirror 24 and then impinges on the spherical surface of the fiber holding body 21, and is introduced into the end surface of the other end portion 16b of each optical fiber 16 from a substantially vertical direction. .

High mount stop lamp 3 configured in this way
Then, the light from the bulb 27 of the light source unit 20 is reflected by the reflecting mirror 24 or directly irradiated on the fiber holding body 21, and the other end portion 16 of each optical fiber 16 passes through the fiber holding body 21.
It is introduced into b and transmitted inside the optical fiber 16 to
Guided up to 6a.

The light emitted from the end face of the one end 16a of the optical fiber 16 has a vertical width substantially equal to the diameter of the inner lens 17 because the inner lens 17 has a cylindrical shape as shown in FIG. The size of the ray, and the first
The outer lens 18 shown in the figure emits the light while spreading it to the left and right, and then emits it to the outside through the rear window glass 2.

Therefore, this high mount stop lamp can emit a line-shaped light beam having a width substantially equal to the diameter of the inner lens 17, and can be configured as an extremely thin line-shaped stop lamp.

Further, the optical fiber 16 does not deteriorate with time,
It becomes possible to use it permanently only by exchanging one valve 27.

In this embodiment, the optical fiber 16, the inner lens 17, the outer lens 18, and the light source unit 20 are integrated inside the lamp body 11, so that the structure can be stopped independently by connecting the structure to the power supply. It can be configured as a lamp and can be mounted anywhere on the vehicle.

On the other hand, a modified example of the light source section 20 is shown in FIG. In this example, the surface of the fiber holding portion 21A that holds the other end portion 16b of the optical fiber 16 is formed in a concave shape, and the light from the reflecting mirror 24 is once converged and then diverged at this fiber holding portion. 21A is provided. Therefore, the fiber holder 21A and the reflecting mirror 24 are provided with a lens barrel 28 and a supporting piece 29 having a required length.
Are connected via. Here, a halogen lamp 27A whose filament is parallel to the optical axis is used as the light source.

With this configuration also, the light from the halogen lamp 27A is reflected by the reflecting mirror 24 or is directly irradiated to the fiber holding portion 21A, and the end surface of the other end 16b of each optical fiber 16 is passed through the fiber holding body 21A. The light is incident substantially vertically on the other hand, and the light is efficiently transmitted.

7 (a) and 7 (b) are modified examples of the other end 16b of the optical fiber 16, in which the other end 16b of each optical fiber 16 is transparent with a larger cross section and a square cross section. The lens body 30 made of resin is integrally formed. Then, these lens bodies 30 are combined in a grid shape and bundled, and the end surfaces are cut into a spherical shape and the peripheral surface is cut into a circular shape, whereby an end surface having a large area can be formed for a small number of optical fibers. In this case, the optical refractive index of the lens body 30 is
If the refractive index is smaller than 16, the light incident on the end face of the lens body 30 is guided into each optical fiber 16 with high efficiency.

The lens body 30 may be formed of transparent rubber as a separate body.

Needless to say, various configurations can be applied to the lens holder, the inner lens, and the outer lens provided on one end side of the optical fiber 16. Further, it goes without saying that various configurations can be adopted for the fiber holder, the reflecting mirror, the bulb, and the like that constitute the light source section 20 provided on the other end side of the optical fiber.

Further, as shown in FIG. 8, an optical fiber 16 is extended below the rear sunshade 5 of the automobile, one end of which is arranged at the rear end of the rear sunshade 5 together with the lens portion 40, and the other end of which is arranged. A high mount stop lamp can be constructed by connecting to the light source section 50 arranged below the rear sunshade 5. Even in this case, needless to say, the lens part 40 provided at one end of the optical fiber and the light source part 50 provided at the other end may have the configuration of each of the above-described embodiments or other configurations. .

Further, when the optical fiber can be extended long, it is possible to reduce the size of the lamp exposed to the outside by disposing the light source section at a hidden place inside the vehicle.

[Effect of device]

As described above, according to the present invention, since the stop lamp is constructed by using the optical fibers whose one end is arranged in a line, the thin lamp corresponding to the diameter dimension of the cylindrical lens arranged facing the one end of the optical fiber is provided. A line-shaped stop lamp can be constructed, and since the thickness of the cylindrical lens in the light emitting direction is large, it is possible to make uniform the light intensity in the array direction of the one end of the optical fiber by diffusing light in the length direction. Especially, even when the arrangement interval of the one end of the optical fiber is increased, it is possible to prevent the unevenness of the light intensity in the arrangement direction, and it is effective in constructing a long-sized high mount stop lamp with a small number of optical fibers. Further, since the light from the light source section is transmitted through the optical fiber and then emitted from one end, a high-luminance stop lamp can be easily constructed by using a high-luminance bulb for the light source section. Furthermore, if the bulb of the light source section is replaced, it can be used permanently.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention, which is a vertical cross-sectional view taken along the line AA of FIG. 3, FIG. 2 is a cross-sectional view of the configuration of FIG. 1, and FIG. 3 is the configuration of FIG. FIG. 4 is a cross-sectional view of the light source unit, FIG. 5 is a schematic cross-sectional view of one end of the optical fiber, and FIG. 6 is a cross-sectional view showing a different modification of the light source unit. FIGS. 8A and 8B are a side view and a front view showing a modified example of the terminal treatment structure at the other end of the optical fiber, and FIG. 8 is a sectional view of another embodiment of the present invention. 1 ... Automobile, 2 ... Rear windshield, 3 ... High mount stop lamp, 4 ... Inner panel, 5 ... Rear sunshade, 11 ... Lamp body, 12 ... Mounting piece, 13 ... Rubber material, 14,14A ... Lens holder, 15a, 15b ... Screw, 16 ... Optical fiber, 16a ... One end, 16b ... Other end, 17 ... Inner lens, 18, 18A ... Outer lens, 20 ... Light source part, 21, 21A ... Fiber holder, 22 ... Bundling Band, 23 ... Mounting piece, 24 ... Reflecting mirror, 25 ... Screw, 26 ... Socket, 27, 27A ... Bulb (light source), 28 ... Lens barrel, 29 ... Supporting piece, 30 ... Lens body, 40 ... Lens section, 50 … Light source.

Claims (1)

[Scope of utility model registration request] 1. A plurality of optical fibers, one end of which is arranged in a line and the other end of which is bundled, and a plurality of optical fibers which are arranged so as to face one end of the optical fiber and extend along the arrangement direction of the one end. A high mount stop lamp for an automobile, comprising a cylindrical lens provided and a light source provided at the other end of the optical fiber to introduce light into each optical fiber.