JPH057537U - Automotive stuppl - Google Patents

Abstract

(57) [Summary] [Purpose] To make the stop lamp attached to the rear windshield of an automobile thin and compact, and to be able to handle all shapes of rear windshield. [Structure] In the stop lamp 1, a reflective LED unit 5 is fitted in a spherical concave portion 4 formed on one surface of a resin molded body 3. In this reflection type LED unit 5, the back surface of the substantially hemispherical transparent resin body 6 is used as a parabolic reflection surface, the LED chip 7 is arranged at a substantially focal position of this reflection surface, and the reflection type LED unit 5 is exposed. A linear Fresnel lens 8 is arranged on the inner surface of the rear window glass 2 facing the light surface, and parallel light is incident on the rear window glass 2 in a direction orthogonal to the rear window glass 2 and is refracted in the horizontal direction to emit light rearward. To do.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

  The present invention relates to a vehicle stop lamp that lights up in association with a brake operation.

[0002]

[Prior art]

  In addition to the usual stop lamps, an optional accessory is provided on the upper side of the rear windshield. The one equipped with all the stop lamps is proposed as No. 61-129631 Has been done. This stop lamp has multiple shell-shaped LED lamps installed inside the case. The light emitted from this LED lamp is collimated by the lens plate and emitted backward. It was done like this.

[0003]

[Problems to be solved by the device]

  In the above-mentioned conventional stop lamp, the light emitted from the shell-shaped LED lamp Is emitted as parallel light to the rear, so it is placed at a position separated by the focal length from the LED lamp. It is necessary to arrange the lens plate, which increases the thickness of the stop lamp. , Obstructing the rear view, hitting a part of the body when getting on and off the back seat, etc. There is a disadvantage.

[0004]   Also, the case of the stop lamp is made of resin such as polycarbonate, When exposed to direct sunlight, there is a large difference in thermal expansion from the glass, and excessive force is applied to the mounting part. It may be damaged and lead to damage.

[0005]   Furthermore, resins such as polycarbonate are relatively hard and cannot be easily bent. , If you make a case of a stop lamp according to the windshield of a specific model, It cannot be applied to the model windshield, which causes cost increase.

[0006]

[Means for Solving the Problems]

  In order to solve the above problems, the stop lamp according to the first invention of the present application is a resin molded body. The reflective LED unit is fitted into the formed recesses, and the reflective LED unit is mounted. A reflective LED unit between the light emitting surface of the knit and the interior side surface of the rear window glass A Fresnel lens that refracts light from the rearward direction is interposed.

[0007]   The stop lamp according to the second invention of the present application is provided with a plurality of recesses formed in a resin molding. Fit the LED unit in the part and supply power to the LED unit inside the resin molded body. A printed wiring board for embedding is embedded, and the resin molding is performed as this printed wiring board. The coefficient of thermal expansion was closer to that of glass than that of the body.

[0008]   Further, the stop lamp according to the third invention of the present application is provided with a plurality of recesses formed in a resin molding. The LED unit is fitted inside the part, and power is supplied to the LED unit inside the resin molded body. And a printed wiring board that has a thermal expansion coefficient closer to glass than the resin molding pair. The thermal expansion suppressing plate was embedded.

[0009]

[Action]

  Parallel light is emitted from the reflective LED, and the parallel light is refracted by the Fresnel lens. Then, the light passes through the glass and is emitted backward.

[0010]

【Example】

  Embodiments of the present invention will be described below with reference to the accompanying drawings. Here, Fig. 1 shows the present invention. Fig. 2 is a side view of the rear part of an automobile to which such a stop lamp is applied. 2 is a vertical sectional view, FIG. 3 is a sectional view taken along the line AA of FIG. 2, and FIG. 4 is an enlarged sectional view of an essential part of FIG. .

[0011]   The stop lamp 1 is the interior side of the upper side of the rear window glass 2 of the inclined vehicle. It is fixed to the surface with screws or adhesive, and its thickness dimension (thickness in the same direction as the glass thickness) is The width dimension in the vertical direction is about 5 mm and is 20 mm or less.

[0012]   The stop lamp 1 is made of silicone resin, PVC, urethane resin or ethylene resin. A spherical concave portion 4 is formed on one surface of a soft resin molding 3 such as ropylene rubber. The reflection type LED unit 5 is fitted in the portion 4.

[0013]   The reflective LED unit 5 is a substantially hemispherical transparent resin body made of epoxy resin or the like. The rear surface of 6 is mirror-finished and then aluminum-deposited into a parabolic reflective surface. The LED chip 7 is placed at the substantially focal point of and the light from the LED chip 7 is reflected on the back surface. And becomes parallel light, which is emitted from the flat light emitting surface facing the rear window glass 2. I am trying.

[0014]   The inside of the rear window glass 2 facing the light emitting surface of the reflective LED unit 5 A linear Fresnel lens 8 is placed on the surface to make parallel light and rear window glass. The light incident from the direction orthogonal to 2 is refracted in the horizontal direction and emitted backward. I have to.

[0015]   A printed wiring board is provided on the rear side of the LED unit 5 in the resin molding 3. 9 and the thermal expansion suppressing plate 10 are embedded, and these are fastened together with the screw 11, and printed wiring The board 9 is connected to a fixed terminal 12 provided on the inner surface of the rear window glass 2. ing.

[0016]   Here, the printed wiring board 9 is made of an epoxy resin containing glass fiber or the like. Select a glass with a coefficient of thermal expansion similar to that of the rear window glass 2 and Similarly, for the tension suppressing plate 10, thermal expansion of stainless steel, titanium, tungsten, or the like is performed. Select one with a tension coefficient similar to that of glass. By doing this, the stop Even if the pump is exposed to direct sunlight, the expansion of the resin molding 3 can be suppressed, so Unreasonable force is applied to the fixed part of the rear lamp glass 2 of the lamp 1 Can be prevented.

[0017]   Further, the Fresnel lens 8, the printed wiring board 9 and the thermal expansion suppressing plate 10 are Each of the divided bodies 8a, 9a, 10a is composed of a plurality of divided bodies. The split body 9a is electrically connected by a connecting line 13.

[0018]   In this way, the Fresnel lens 8, the printed wiring board 9, and the thermal expansion suppressing plate 10 are combined. The stop lamp 1 as a whole can be made flexible by dividing it into several pieces. The deep wind-shaped rear window glass can be fixed without gaps. It is also possible to deal with various types of rear window glass.

[0019]   In the illustrated example, the Fresnel lens should be attached to the rear window glass. Even if the tilt angle of the rear window glass changes, it is necessary to replace the Fresnel lens only. The Fresnel lens may be adhered to the light emitting surface of the LED unit. . Moreover, nothing is interposed between the Fresnel lens and the light emitting surface of the LED unit. However, the space may be filled with resin or the like. In this case the refractive index is different Therefore, select a Fresnel lens according to it.

[0020]   FIG. 5 is a view similar to FIG. 2 showing another embodiment, and in this embodiment, Fresnel Instead of a lens, a transparent hologram film 20 is used to release the reflection type LED unit 5. It is interposed between the light surface and the indoor side surface of the rear window glass 2. This hologram The film 20 bends the light from the reflective LED unit 5 backwards. Interference fringes are recorded. The hologram film 20 is provided between the laminated glasses. May be.

[0021]   The interference fringes were recorded at the same angle as the tilt angle of the rear window glass, as shown in Fig. 6. Set the hologram film 20 and set the hologram film 20 in the A direction (water Exposing laser light from the horizontal direction and the B direction (the direction orthogonal to the hologram film) By doing. In the hologram film 20 on which the interference fringes are formed in this way When the light of the same wavelength as the laser light is applied from the reflection type LED unit 5 in the B direction, Light is bent in the C direction (backward) and goes out.

[0022]

[Effect of device]   As described above, according to the present invention, the plurality of recesses formed in the resin molding are The reflective LED unit is fitted, and the light emitting surface and rear Direct the light from the reflective LED unit to the back of the interior surface of the Indian glass. Since a Fresnel lens that refracts is interposed, the stop lamp is significantly larger than before. It can be made very thin, it does not obstruct the rear view and it is an obstacle when getting on and off the back seat. Never be.

[0023]   In addition, a resin molded body made of a material having a coefficient of thermal expansion closer to that of glass than the resin molded body is used. Since a printed wiring board or thermal expansion suppression plate is embedded, it can be used in direct sunlight. Even if there is a large difference in thermal expansion between the glass and the stop lamp, this can be suppressed. You can

[0024]   Further, divide the Fresnel lens, the printed wiring board or the thermal expansion suppressing plate into multiple parts. This makes it possible to apply one type of stop lamp to multiple types of rear window glass, Leads to a downdown.

[0025]   Also, instead of the Fresnel lens, the light emitting surface and the rear window of the reflective LED unit are used. Light from the reflective LED unit is refracted backwards between the glass and the interior surface of the room. If a hologram film is inserted, the stop lamp thickness Can be made thin (3-5 mm).

[Brief description of drawings]

FIG. 1 is a rear side view of an automobile to which a stop lamp according to the present invention is applied.

FIG. 2 is a vertical sectional view of the stop lamp.

FIG. 3 is a sectional view taken along line AA of FIG.

FIG. 4 is an enlarged cross-sectional view of the main part of FIG.

FIG. 5 is a view similar to FIG. 2 showing another embodiment.

FIG. 6 is a diagram illustrating an exposure process on a hologram film.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Stop lamp, 2 ... Rear window glass, 3 ... Resin molding, 5 ... Reflective LED unit, 7 ... LED chip, 8 ... Fresnel lens, 9 ... Printed wiring board, 10
... Thermal expansion suppressing plate, 20 ... Holographic film.

Claims (5)

[Scope of utility model registration request] 1. A stop lamp directly attached to an inner surface of a rear window glass of an automobile, wherein the stop lamp has reflection-type LED units fitted in a plurality of recesses formed in a resin molding, and the reflection-type LED units are exposed. A stop lamp for a vehicle, characterized in that a Fresnel lens for refracting light from a reflective LED unit backward is interposed between the light surface and the interior side surface of the rear window glass. 2. A stop lamp directly attached to an inner surface of a rear window glass of an automobile, wherein the stop lamp is LE in a plurality of recesses formed in a resin molded body.
The D unit is fitted, and a printed wiring board for supplying power to the LED unit is embedded in the resin molded body, and one having a coefficient of thermal expansion closer to that of glass than the resin molded body is selected as the printed wiring board. Stop lamps for automobiles. 3. A stop lamp directly attached to an inner surface of a rear window glass of an automobile, wherein the stop lamp is LE in a plurality of recesses formed in a resin molding.
A D wiring unit is fitted, and a printed wiring board for supplying power to the LED unit and a thermal expansion suppressing plate having a coefficient of thermal expansion closer to that of glass than the resin molded body are embedded in the resin molded body. Stop lamp. 4. The stop lamp for an automobile according to claim 1, wherein the Fresnel lens, the printed wiring board or the thermal expansion suppressing plate is divided into a plurality of parts. 5. A stop lamp directly attached to an inner surface of a rear window glass of an automobile, wherein the stop lamp is LE in a plurality of recesses formed in a resin molded body.
The D unit is fitted, and the reflection type L unit is inserted between the light emitting surface of the reflection type LED unit and the indoor side surface of the rear window glass.
A stop lamp for an automobile, characterized in that a hologram film for refracting light from the ED unit backward is interposed.