JPH0221502A - Lighting apparatus for vehicle - Google Patents

Abstract

PURPOSE:To prevent the attachment of waterdrops and to improve the lighting effect by communicating the inside and the outside of a lighting unit with a communicating hole, and shielding the hole with a filter with the ventilation and waterproof properties. CONSTITUTION:At the rear side of a lighting body 15, a communicating hole 24 and a communicating pipe 25 to link the inside of a lighting unit 17 and the inside of a rear spoiler 11 are provided, and the pipe 25 is extended being bent downward at its tip. Since the inside of the lighting unit 17 is linked to the outside through the pipe 25 the ventilation of air is free, and temperature and the humidity can be maintained almost equal to the outside. A filter 26 is furnished at the opening of the inside of the pipe 25, that is, at the hole 24. By forming the filter 26 with a porous film of a fluorocarbox type or polyethylene type, it has a high ventilation property. Consequently, the generation of waterdrops by the turning on and off of a light-emitting diode is reduced or prevented, and the temperature rise and the pressure rise at the turning on and off of the light-emitting diode are also reduced.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention is applied to a stop lamp, etc., commonly called a no-mounted stop lamp, which is installed at the rear of an automobile body and warns following vehicles when the brake is applied. The present invention relates to a suitable vehicle lamp.

[Conventional technology]

In recent automobiles, as shown in Figs. 14 and 15, a stop lamp 3 is installed on the rear upper surface of the car body 1 and is incorporated into the rear protruding end of the rear spoiler 2, which is turned on together with the brake lamp when the brakes are operated. In this way, drivers of following vehicles are made to be more careful, thereby preventing rear-end collisions, etc. (Utility Model Application No. 61-190779, Utility Model Application No. 61-190780, etc.). The rear spoiler 2 reduces the lift force at the rear of the vehicle body during running and improves running performance, and is long in the left-right direction and has an airfoil-shaped cross-section. Therefore, the stop lamp 3 includes a lamp unit 7 formed in a band shape and consisting of a lamp body 5 and a front lens 6 so that it can be incorporated into an elongated notch 4 provided at the rear projecting end of the rear spoiler 2. A large number of light emitting diodes 8 are incorporated as light sources.

[Problem to be solved by the invention]

By the way, this type of high mount stop lamp 3 that generally uses a light emitting diode 8 as a light source has a completely sealed type lamp unit 7 formed by the lamp body 5 and front lens 6, so there is no need to worry about the inside of the lamp unit T when assembling the lamp. When moisture in the air sealed in the air becomes water droplets and adheres to the inner surface of the front lens 6 due to a decrease in ambient temperature, the amount of light that comes out from the light emitting diode 8 and passes through the front lens 6 decreases, reducing the lighting effect. There was a problem of lowering the

Next, the present invention solves the above-mentioned problems,
The object of the present invention is to provide a vehicular lamp that can prevent the generation of water droplets by communicating the interior of the lamp body with the outside while maintaining good waterproofness of the lamp body itself.

[Means to solve the problem]

In order to achieve the above-mentioned object, the present invention includes a lighting unit with a sealed structure, which includes a lighting body and a front lens, and in which a large number of light emitting diodes are arranged in parallel in the vehicle width direction at predetermined intervals. is assembled into a mounting body such as a spoiler installed on the vehicle body, the upper surface of the rear end of the vehicle body, or the roof, and the front lens is exposed to the outside from the rear protruding end of the mounting body, and the lamp unit is attached to the mounting body. A communicating hole is provided, which is covered with a waterproof and breathable filter.

[Effect]

In the present invention, since the filter does not allow water to pass through but only air, the temperature and humidity inside the lamp unit are made approximately equal to those outside. Therefore, generation of water droplets due to blinking of the light emitting diode is reduced and prevented. Furthermore, the temperature and pressure rises during lighting of the light-emitting diodes constituting the open-type lamp unit are also small.

〔Example〕

Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.

Fig. 1 is a sectional view taken along the line C--C in Fig. 2 showing an embodiment of the present invention applied to a stop lamp incorporated in a rear spoiler; Figure 3 is a sectional view taken along line C-C in Figure 2, Figure 4 is a sectional view taken along line C-C in Figure 2, Figure 5 is a sectional view taken along line C-C in Figure 2, and Figure 6 is a sectional view taken along line C-C in Figure 2.
7 is a sectional view taken along line C-C in FIG. 2, FIG. 8 is an enlarged perspective view of the light control section, FIG. 9 is a sectional view taken along line C-C in FIG. FIG. 2 is a sectional view taken along line C-C. Figure 1~
To explain the structure of the rear spoiler and stop lamp in FIG. 7, 10 is the rear upper surface of the vehicle body (FIG. 3), and 11 is a mounting body installed on the rear upper surface 10 of the vehicle body via a gasket 12 in the left-right direction. The long airfoil-shaped rear spoiler 13 is a strip-shaped stop lamp that is long in the left and right direction and is provided on the lower surface side of the longitudinal center of the rear projecting end of the rear spoiler 11, and is disposed in an elongated notch 14 having a predetermined length. . The stop lamp 13 includes a plate-shaped lamp body 15,
A lamp unit consisting of a front lens 16 having a substantially U-shaped vertical cross-sectional shape and opening toward the front of the vehicle body, the open end of which is fixed to the front surface of the lamp body 15 (the rear side of the vehicle body) by ultrasonic welding or the like. 1γ, and a printed circuit board 18 on which a large number of light emitting diodes 19 are mounted is disposed inside the lamp unit 17.

As shown in FIG. 1 and FIG. 5, a plurality of fixing pieces 20 are integrally provided on the rear surface of the lamp body 15 and protrude toward the front of the vehicle body, and these fixing pieces 20 are connected to the notch 14. It is firmly fixed to the ceiling surface of the building with bolts 21 and nuts 22. Further, the upper surface of the front lens 16 also has a notched recess 14.
It is fixed to the ceiling surface using double-sided adhesive tape 23 (FIG. 5), adhesive, or the like. A communication hole 24 and a communication pipe 25 (FIG. 1,
The communicating pipe 25 extends toward the front of the vehicle body, and its tip is bent downward to prevent rainwater from entering. Since the inside of the lamp unit 1T communicates with the outside via the communication pipe 25, air can freely circulate, and the temperature and humidity are made approximately equal to those of the outside. Therefore, generation of water droplets and fluctuations in temperature and pressure due to blinking of the light emitting diode 19 are reduced and prevented. A filter 26 (Figs. 1 and 6) is disposed at the inner open end of the communication pipe 25, that is, the communication hole 24, and this filter 26 is made of fluorine, polyethylene, ultra-high molecular polyethylene, acrylic, etc. It has high air permeability because it is formed from a porous film. Therefore, air circulation is free. However, it is waterproof by blocking the passage of water.

In the longitudinal center of the lamp body 15, a cord lead-out hole 29 (
1 and 9), and a rubber bushing 30 is fitted and fixed in this cord lead-out hole 29. One end of the cord 28 is connected to the electrical circuit of the printed circuit board 18, and the other end passes through the rear spoiler 11 and is connected to the upper rear part of the vehicle body. It is guided into the vehicle body through an insertion hole 32 (FIG. 3) provided in the hole 1. A plurality of circuit board bubble attachment parts 33 (FIGS. 1 and 4) are integrally protruded forward on the front surface of the lamp body 15, and the printed circuit board 18 is secured to the front end surface of the circuit board 18 by a set screw 34. It is fixed almost vertically.

The light emitting diodes 19 are arranged in parallel in a line at a predetermined interval in the left-right direction on the front surface of the printed circuit board 18, and their optical axes 47 (FIG. 3) are approximately horizontal and parallel to the center axis L in the left-right direction of the vehicle body.
(Fig. 1).

The front lens 16 is made of a translucent resin colored red, yellow, etc. and has a box-like shape long in the left and right direction, and its inner surface, that is, the surface 40 corresponding to the light emitting diode 19, is a third
As shown in FIGS. 7 to 7, it is inclined toward the rear of the vehicle body, and its lower end is curved with an appropriate curvature and is continuous with the bottom surface 41. However, as shown in FIG. 11, it may be inclined toward the front of the vehicle body. Further, a light control section 43 is formed at the upper end of the inner surface 40 corresponding to each light emitting diode 19, and a side step 44 is formed at the lower end.

The light control section 43 improves the visibility of the step lamp 13 from the rear of the vehicle body by guiding the incident light from the corresponding light emitting diode 19 toward the rear of the vehicle body, as shown in FIGS. 8 to 11. It is composed of a total of nine prism groups 45A to 45I, which are rectangular in the same size and arranged in three rows of three vertically and horizontally, and the center of the prism 45E located in the center is the center of the corresponding light emitting diode 19. They almost match. The central prism 45g is formed into a concave curved shape with an appropriate curvature (R□) as shown in FIGS. 9 and 10. Above and below the central prism 45E,
Four prisms 45B and 45D located on the left and right.

45F and 45T (have a stepped portion 46 by slightly protruding the inner end, that is, the side end touching the central prism 45E than the prism 45E, and the wall thickness becomes thinner from the inner end to the outer end. It is formed.

Finally, the two left and right prisms 45B and 45H are the ninth prisms.
As shown in the figure, the cross-sectional shape is a left-right symmetrical substantially triangular shape, and the vertical cross-sectional shape of the two upper and lower prisms 45D and 45F is also substantially triangular as shown in FIG. In the inclined prism 45F, the height of the stepped portion 46 of the lower prism 45F is set larger than that of the upper prism 45D.In the case of the inclined prism 45F shown in FIG. 11, the height is set to be the opposite. Furthermore, the height of the stepped portions 46 of the two left and right prisms 45B and 45T (as appropriately shown in FIG. 8) is higher than that of the upper prism 45D and lower than the stepped portion height of the lower prism 45F. , the four prisms 45B, 45D,
The surfaces of 45F and 457 (are formed into concave curved surfaces with appropriate curvature (R3)).

4 prisms 45A located at the four corners, 450.45
G, 45I are the four prisms 45B as shown in FIG.

45D, 45F, and 45H, the surface 49 has a stepped portion 48 by forming a protrusion that is one step higher than that of 45D, 45F, and 45H.
is formed into a concave curved surface with an appropriate curvature that slopes toward an inner corner 50 in contact with the central prism 45E and a corner 51 at a diagonal position. Therefore, the thickness of the four prisms 45A, 45C, 45G, and 451 is maximum at the inner corner 50 and minimum at the outer corner 51, and the vertical and cross-sectional shapes are substantially triangular.

Note that H is the reference thickness of the front lens 16.

As described above, the prisms 45A to 45I (excluding the central prism 45E) have a step height,
By changing the radius of curvature of the surface, the refraction angle and direction of light are different, and this makes the light emitting diode 1
The light 53 emitted from the lens 9 is refracted in the direction of the optical axis 47, and is emitted from the front lens 16 toward the rear of the vehicle body.

In this case, in this embodiment, the surfaces of each of the prisms 45A to 45I are formed into a concave shape with an appropriate curvature, but there is no limitation to this, and gentle changes are possible. As shown in FIGS. 12 and 13, prisms 45A~
All surfaces of 45I may be formed flat.

Although the above embodiment shows an example in which the stop lamp 13 is incorporated into the rear spoiler 11 installed on the upper surface of the rear end of the vehicle body, the stop lamp 13 may also be incorporated into an attachment body such as a spoiler installed on the roof of the vehicle body. Of course, it can be applied.

〔Effect of the invention〕

As described above, according to the vehicle lamp according to the present invention, the inside and outside of the lamp unit are communicated through the communication hole, and the communication hole is closed with a filter having breathability and waterproofness.
Air can freely flow in and out and the temperature inside and outside the lamp unit can be made almost equal. Therefore, unlike a sealed type, there is no risk that moisture inside the lamp will turn into water droplets and adhere to the inner surface of the lens due to a drop in outside temperature. Its effects are extremely significant, such as improved lighting effects with less water leakage, and highly reliable waterproofing as the filter prevents rainwater from entering even though it is an open type.

[Brief explanation of drawings]

1 is a sectional view taken along the line C-C in FIG. 2 showing an embodiment of the present invention applied to a stop lamp incorporated in a rear spoiler; FIG. The figure is a cross-sectional view taken along line C-C in figure 2, Figure 4 is a cross-sectional view taken along line C-C in figure 2, figure 5 is a cross-sectional view taken along line C-C in figure 2, and figure 6 is a cross-sectional view taken along line C-C in figure 2.
7 is a sectional view taken along line C-C in FIG. 2, FIG. 8 is an enlarged perspective view of the light control section, FIG. 9 is a sectional view taken along line C-C in FIG. FIG. 8 is a cross-sectional view taken along line T (-H; FIG. 11 is a cross-sectional view showing another embodiment of the front lens; FIGS. 12 and 13 are a cross-sectional view and a vertical cross-sectional view showing other embodiments of the light control unit. The top view, FIG. 14, and FIG. 15 are a perspective view and a sectional view of a rear spoiler incorporating a conventional stop lamp. 2. Rear spoiler, 3. Stop lamp,
5...Lighting body, 6...Front lens, γ...
・・Light unit, 8・・Light emitting diode, 11・
...Rear spoiler, 13...Stop lamp, 1
4...Notch, 15...Lamp body, 16...
...Front lens, 17...Light unit, 19...
...Light emitting diode, 24...Communication hole, 25...
・Communication pipe, 26...filter. Figure 6 Patent applicant Koito Manufacturing Co., Ltd.

Claims (1)

[Claims] It is equipped with a closed-structure lighting unit consisting of a lighting body and a front lens, in which a large number of light emitting diodes are arranged in parallel at predetermined intervals in the vehicle width direction. The front lens is assembled into a mounting body such as a spoiler installed above, and the front lens is exposed to the outside from the rear protruding end of the mounting body, and the lighting unit is provided with a communication hole that opens to the mounting body, and is made waterproof. A vehicle lamp characterized by being covered with a filter having air permeability.