JP5473059B2 - Vehicle lighting equipment - Google Patents

Description

  The present invention relates to a vehicular lighting fixture, and more particularly to a vehicular lighting fixture that is provided on a ceiling portion of a railway vehicle and that can effectively illuminate the interior of a passenger cabin with less energy.

  As shown in FIGS. 8 and 9, conventionally, as the vehicle lighting device 5 disposed in the railway vehicle 1, one that is disposed on the ceiling portion 2 along the longitudinal direction of the railway vehicle 1 is known. Yes. The vehicle lighting device 5 includes a straight tube fluorescent lamp 6 and a translucent cover that covers the entire straight tube fluorescent lamp 6. Since the light emitted from the straight tube type fluorescent lamp 6 is radiated substantially uniformly from the ceiling part 2 in all the downward directions, the interior of the railway vehicle 1 is not necessarily efficiently illuminated.

  That is, the vehicle lighting device needs to illuminate the interior of the vehicle with appropriate brightness in order to provide a comfortable space for passengers. On the other hand, when considering environmental issues in recent years, it is important to efficiently illuminate with as little energy as possible. The conventional vehicular lighting fixture 5 shown in FIGS. 8 and 9 emits light substantially evenly in all directions, and therefore illuminates a portion that does not necessarily require illumination. Since the light emitted toward a certain window leaks out of the vehicle, there is a problem that it is not efficient.

  Moreover, as an illuminating device that illuminates the inside of a railway vehicle by indirect illumination, the lamp cover is configured by three plate-like cover members extending along the longitudinal direction of the fluorescent lamp, thereby covering the fluorescent lamp and covering the fluorescent lamp. A railcar lamp is known in which light is reflected outside a fluorescent lamp through a gap between members to indirectly illuminate over a wide range (see, for example, Patent Document 1). In addition, a flat discharge tube is built into a casing having an inclined diffuse reflection surface to form a thin illuminating device that can be attached to the underside of the cargo rack, and the whole can be soft and relaxed while ensuring the illumination necessary for reading. An illuminating device that illuminates like this has been proposed (see, for example, Patent Document 2).

  The illumination devices described in Patent Documents 1 and 2 indirectly illuminate the entire vehicle by reflecting light with a cover member or a diffuse reflection surface. However, the light emitted from the luminaire toward the window leaks out of the vehicle and cannot be used effectively as illumination light, which may reduce illumination efficiency. In particular, in subway vehicles that travel in dark places and vehicles at night, there is a strong tendency for a decrease in lighting efficiency, and there is room for improvement.

JP 2008-149970 A JP 2007-302162 A

  The present invention has been made in view of the above circumstances, and provides a vehicle lighting device that can suppress illumination light leaking outside the vehicle, efficiently illuminate the interior of the vehicle with less energy, and improve illumination efficiency. For the purpose.

The present invention includes a ceiling portion, and a ceiling side wall portion continuous to the ceiling, and the wall opening, a vehicle lighting fixture to be attached provided the vehicle having a floor, and a light source unit, an optical system, The optical system is a reflecting plate disposed above the light source unit, and the reflecting plate is inclined upward as it goes toward the center in the left-right direction of the vehicle; A second reflecting portion extending from the first reflecting portion and inclined upward at a larger angle than the first reflecting portion .

  With this configuration, light leaking out of the vehicle from the wall opening can be suppressed, and the interior of the vehicle can be illuminated efficiently. This makes it possible to brighten the ceiling side wall and improve the overall brightness, and to improve the visibility of the display in the vehicle and the advertisement.

Further, it is possible to easily manufacture the optical system, it can be directed toward the light from the light source unit to the ceiling side wall and seat surface by cheap instruments.

Further, the present invention includes the above vehicle lighting device, wherein the light source unit is a linear light source.

  With this configuration, it is possible to efficiently and uniformly illuminate the entire interior of the vehicle by arranging the longitudinal direction of the light source unit in accordance with the longitudinal direction of the vehicle.

  ADVANTAGE OF THE INVENTION According to this invention, the illumination light which leaks out of a vehicle can be suppressed, the inside of a vehicle can be illuminated efficiently with little energy, and the lighting fixture for vehicles with high illumination efficiency can be provided.

1 is a perspective view of a vehicle in which the vehicle lighting device of Embodiment 1 according to the present invention is arranged. Partial sectional view of the vehicle lighting apparatus shown in FIG. The graph which shows the light distribution direction of the lighting fixture for vehicles shown in FIG. The perspective view which shows the illumination state in the vehicle by the vehicle lighting fixture shown in FIG. FIG. 3 is a perspective view of a vehicle in which the vehicular lighting fixture according to the second embodiment of the present invention is disposed. Sectional drawing of the vehicle lighting fixture shown in FIG. The graph which shows the light distribution direction of the lighting fixture for vehicles shown in FIG. Partial perspective view of a vehicle provided with a conventional vehicle lighting device Sectional drawing of the conventional vehicle lighting device shown in FIG.

Hereinafter, embodiments of a vehicle lighting device according to the present invention will be described in detail with reference to the drawings.
(Embodiment 1)
FIG. 1 is a perspective view of a vehicle provided with a vehicle lighting device according to Embodiment 1 of the present invention, and FIG. 2 is a partial cross-sectional view of the vehicle lighting device. As shown in FIG. 1, the railway vehicle 30 includes a ceiling portion 31, a ceiling side wall portion 32 that is continuous with both sides of the ceiling portion 31 in the left-right direction, and a window portion 33 that is a wall opening provided below the ceiling side wall portion 32. And a seat 34 provided between the floor portion 34 and the window portion 33 and the floor portion 34, and a space defined by these constitutes a cabin 36.

  The vehicle lighting device 10 according to the present embodiment is arranged in two rows on the ceiling portion 31 along the longitudinal direction of the railway vehicle 30, and illuminates the interior of the cabin 36. As shown in FIG. 2, the vehicular lighting fixture 10 includes a light source unit 11 and an optical system 12. The light source unit 11 is a linear light source in which, for example, light emitting diodes (hereinafter abbreviated as “LED”) are linearly arranged, and is mounted on a mounting substrate 13 fixed to a mounting base 14 made of sheet metal. Yes. The mounting base 14 is fixed to the ceiling portion 31 by mounting screws (not shown). In addition, the light source part 11 is not limited to LED, A straight tube | pipe type fluorescent lamp etc. may be sufficient.

  The optical system 12 is configured by a cover 12 having a substantially semicircular cross section that covers the front side (light emission side) of the light source unit 11, and the cover 12 is, for example, a nonflammable transparent resin having high translucency. It is molded with. A linear prism 15 is integrally formed on the inner surface 12a of the cover 12 in a symmetrical position with respect to the center line CL so as to be substantially parallel to the light source unit 11 that is a linear light source.

  The prism 15 controls the light distribution by refracting light emitted from the light source unit 11 and incident on the prism 15 in a predetermined direction. Specifically, as indicated by broken line arrows in the figure, the light emitted from the light source unit 11 toward the window 33 is refracted by being incident on the prism 15 and is emitted from the prism 15 toward the ceiling side wall 32. In addition, the position, size, and refraction angle of the prism 15 are set.

  An outer cover 16 having a substantially semicircular cross section is fixed to the outer side of the cover 12 by an outer cover fixture 18 via a packing 17. The outer cover 16 is formed of, for example, a non-flammable translucent resin, and softens the light emitted from the light source unit 11 to illuminate the cabin 36.

  In the vehicular lighting fixture 10 having such an optical system 12, as shown in FIG. 3, the light emitted from the light source unit 11 at an irradiation angle of approximately 50 ° to 70 ° and irradiated toward the window 33 is Then, the light enters the prism 15 and is refracted, and is emitted toward the ceiling side wall portion 32 at an irradiation angle of about 75 ° to 85 °. Further, light emitted from the light source unit 11 at an irradiation angle of approximately 0 ° to 40 ° and 75 ° to 85 ° passes through the transparent cover 12 without being incident on the prism 15, and is transmitted to the floor of the railway vehicle 30. The seat 35 and the ceiling side wall part 32 are illuminated from the part 34. Here, the irradiation angle is set to 0 ° in the downward direction from the light source unit 11 and 90 ° in the lateral direction.

  As shown in FIG. 4, the light emitted from the light source unit 11 toward the window 33 indicated by the broken-line arrow in the drawing (irradiation angle of about 50 ° to 70 °) is applied to the ceiling side wall by the prism 15. Since light is refracted in the direction of the portion 32 (irradiation angle is approximately 75 ° to 85 °), light leakage from the window portion 33 to the outside of the railway vehicle 30 is suppressed, and the ceiling side wall portion 32 is illuminated brightly.

  As described above, according to the vehicular lighting fixture 10 according to the embodiment of the present invention, the interior of the cabin 36 can be illuminated brightly compared to the conventional vehicular lighting fixture, and the overall brightness feeling can be improved. While improving, the visibility of the display thing and advertisement posted in the railroad vehicle 30 can be improved. Moreover, it can illuminate efficiently with little energy.

  The light distribution direction by the prism 15 is the light emitted from the light source unit 11 toward the window 33 (irradiation angle of about 50 ° to 70 °) and the range from the floor 34 to the seat 35 (irradiation angle of about 0 ° to about 30 °). (40 °) may be refracted.

(Embodiment 2)
Next, Embodiment 2 of the vehicle lighting device will be described with reference to FIGS. The vehicle lighting device 10 according to the second embodiment is disposed above the left and right luggage shelves 37 of the railway vehicle 30. In addition, in the following description, in order to make an understanding easy, as shown in FIG. 5, the vehicle lighting device 10 on one side will be described. That is, the vehicle lighting device 10 arranged on one side (right side in the figure) is arranged on the other side (left side in the figure) with respect to the center plane CF that bisects the railway vehicle 30 in a vertical section along the longitudinal direction. The ceiling side wall part 32, the floor part 34, and the seat 35 are illuminated.

  As shown in FIG. 6, the vehicular lighting fixture 10 includes, for example, a light source unit 11 that is a linear light source in which LEDs are linearly arranged, and a reflector plate 20 that is an optical system. The light source unit 11 is fixed to the mounting base 14 made of sheet metal with the light emission direction facing upward, and is fixed to the ceiling unit 31 above the luggage shelf 37.

  The reflection plate 20 is a metal plate that is formed in an approximately U shape in cross section and is disposed opposite to the upper side of the light source unit 11. The first reflection unit is slightly inclined upward toward the center in the left-right direction of the railway vehicle 30. 20a and a second reflecting portion 20b extending from the first reflecting portion 20a and inclined upward at an angle larger than that of the first reflecting portion 20a. The lower surfaces (surfaces facing the light source unit 11) of the first reflecting unit 20a and the second reflecting unit 20b are mirror surfaces that are reflecting surfaces, and efficiently reflect the light emitted from the light source unit 11.

The light source unit 11 and the reflection plate 20 are covered with a cover 21 disposed below. The cover 21 is formed of a nonflammable translucent resin, is emitted from the light source unit 11, and softens the reflected light from the reflection plate 20 to illuminate the interior of the cabin 36.

  As shown in FIG. 7, a part of the light emitted from the light source unit 11 is reflected by the reflection surface of the first reflection unit 20a within an irradiation angle range of approximately 10 ° to 40 °. Further, the remaining light is reflected by the reflecting surface of the second reflecting portion 20b within an irradiation angle range of approximately 70 ° to 85 °. Thus, the reflection angle of the reflection plate 20 is set so that the amount of light reflected in the irradiation angle range of approximately 50 ° to 70 ° is reduced.

  As shown in FIG. 5, light with an irradiation angle of approximately 50 ° to 70 ° is light that is irradiated toward the window 33, but the irradiation light in this direction is limited by the reflector 20 so as to be reduced. Therefore, light leakage from the window 33 to the outside of the railway vehicle 30 is suppressed, and the interior of the passenger compartment 36 can be efficiently illuminated. Further, since the light from the vehicle lighting devices 10 arranged on the left and right sides of the railroad vehicle 30 intersects in the vicinity of the center plane CF of the vehicle 30, the center of the railroad vehicle 30 (intermediate portion between the two vehicle lighting devices 10). Can be illuminated more brightly.

Further, the light from the light source unit 11 is reflected by the reflector 20 of the lighting fixture 10 disposed above the luggage shelf 37 to illuminate the interior of the passenger compartment 36, so that the light is emitted from the luggage shelf 37 in the vicinity of the vehicle lighting fixture 10. It can suppress that irradiation of light is inhibited.

  Since other parts are the same as those of the vehicle lighting device 10 according to the first embodiment of the present invention, the same parts are denoted by the same or corresponding reference numerals, and the description thereof will be simplified or omitted.

  The present invention is not limited to the above-described embodiments, and modifications, improvements, etc. can be made as appropriate.

10 Vehicle Lighting Equipment 11 Light Source (Linear Light Source)
12 Cover (optical system)
15 Prism 20 Reflector (optical system)
30 Railway vehicle 31 Ceiling part 32 Ceiling side wall part 33 Window part (wall opening part)
34 Floor 35 Seat CF Center plane

Claims (2)

A ceiling portion, said a ceiling side wall portion continuous to the ceiling, and the wall opening, a vehicle lighting fixture to be attached provided the vehicle having a floor, a
A light source unit and an optical system,
The optical system is a reflecting plate disposed to face above the light source unit,
The reflecting plate extends upward from the first reflecting portion, and is inclined upward at a larger angle than the first reflecting portion, the first reflecting portion being inclined upward toward the center in the left-right direction of the vehicle. A vehicle lighting device comprising: a second reflecting portion . The vehicle lighting device according to claim 1 ,
The said light source part is a vehicle lighting device which is a linear light source.

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