JPH04124201U - Thin indoor lighting for vehicles - Google Patents

Abstract

(57) [Summary] [Purpose] The present invention relates to an interior lighting lamp for a vehicle, and its purpose is to provide an interior lighting lamp for a vehicle that can provide uniform illumination over a certain area and that can be formed to be thin. . [Structure] A tubular lamp is installed at the cutout end of the prism plate to allow lamp light to enter the prism plate in a direction perpendicular to the thickness direction of the prism plate to which the light diffusing plate is attached, and on the back side of the prism plate. The illumination lamp, in which the light reflection layer is formed so that the density becomes higher as the distance from the lamp position increases, is disposed at an appropriate position such as a roof portion or a pillar portion in a vehicle interior.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a vehicle interior lighting lamp that illuminates the interior of a vehicle.

0002

[Conventional technology]

Generally, vehicles are equipped with interior lights to illuminate the interior of the vehicle. By operating the specified switch, you can use the The interior of the vehicle is illuminated either automatically or automatically.

0003

[Problem that the idea aims to solve]

However, the conventional lighting lamps are similar to spotlights. The area near where the lighting lamp is installed is bright, and the distance from this installation location is The brightness was uneven, getting darker over time.

0004 Additionally, there is a limit to the thickness of the vehicle casing, especially in the ceiling area. is thin, and lighting lights installed in this area inevitably protrude into the room. It didn't look very nice.

[0005] The present invention was devised in view of the above-mentioned problems, and is designed to cover a certain area inside the vehicle interior. Thin design that allows for even lighting across the room and minimizes protrusions into the room The purpose of the present invention is to provide a vehicle interior lighting lamp that can

[0006]

[Means to solve the problem]

In order to solve the above-mentioned problems, this invention aims to improve the thickness of the prism plate to which the light diffusing plate is attached. In order to let the lamp light enter in the direction perpendicular to the viewing direction, the notched end of this prism plate is In addition to arranging a tubular lamp, a light reflecting layer is placed on the back side of this prism plate. Lighting lamps are installed at appropriate locations in the vehicle interior so that the density increases as they move away from the vehicle interior. The structure is such that it can be attached to a certain position.

[0007]

[Effect]

The operation of the present invention will be explained based on FIGS. 1(A) and 1(B).

[0008] Figures 1 (A) and (B) are for explaining the principle of lighting lamp 1 used in the present invention. This is a diagram. Of these, figure (A) is a partial cross-sectional view, and figure (B) is the configuration and operation. It is an exploded perspective view which is disassembled and drawn three-dimensionally to explain the function in an easy-to-understand manner. In the figure, 2 is a prism plate, and dots are arranged on the top surface of this prism plate 2. A light reflecting layer 3 is formed. This light reflecting layer 3 is located at the notched end of the prism plate 2. In the drawing, the light entering from the tubular lamp 4 arranged at 2' is reflected downward. The radiation becomes denser as the distance from the lamp 4 mounting position increases. It is arranged so that In this case, the higher the density, the higher the light reflectance.

[0009] 5 is a light diffusing plate, the lower surface 5' of which is formed with minute irregularities in a satin pattern; The light from the lamp 4 reflected by the light reflection layer is diffused by the light diffusion plate 5, and It is emitted as uniform light. The middle part of this light diffusing plate 5, the position of the lamp 4 A lamp cover 6 is placed directly below to prevent the area near the lamp 4 from getting too bright. The amount of light is being adjusted. Furthermore, the upper surfaces of the prism plate 2 and the lamp 4 are It is covered by a back cover 7 which also serves as a heating plate.

0010 In such a configuration, the radiation light emitted by the lamp 4 is transmitted to the notched end of the prism plate 2. 2', it advances in the direction perpendicular to the thickness direction of this prism plate 2 (in the direction of the arrow 4'). go The light intensity decreases as the distance from the lamp 4 increases. The light travels toward the other end while being diffusely reflected by the light reflecting layer 3. However, as mentioned above The light reflecting layer 3 is arranged so that the density becomes higher as the distance from the lamp 4 increases. The result is that as the light intensity of lamp 4 decreases, the reflectance of light increases. The light from the lamp 4 becomes uniform light over the entire surface of the prism plate 2 and passes through the light diffusing plate 5. The light is radiated downward in the drawing. The light diffusing plate 5 emits illumination light. In addition to having the effect of diffusing the light, it also has the effect of protecting the illumination lamp 1 as a whole.

[0011] In addition, a small diameter tubular lamp is used as the lamp 4, and this lamp is attached to the prism plate 2. Arranged at the notch end and configured to guide this light into the prism plate 2 for illumination. Therefore, it is possible to make the entire illumination lamp 1 extremely thin.

0012

【Example】

Embodiments of the present invention will be described based on the drawings.

[0013] Figure 2 shows a first embodiment of the indoor lighting used in the present invention. A) is a front view, and FIG. 2(B) is a central sectional view in the longitudinal direction. Figure 2 (C ) is the arrangement density of the above-mentioned light reflecting layer arranged on the prism plate 2 of this indoor lighting lamp 1. FIG. 4 is a diagram showing the arrangement of lamps 4. FIG. This figure is drawn horizontally.

In the figure, 4a _, 4b is a lamp, and in this embodiment, two lamps are used to constitute the illumination light 1. These lamps 4a _and 4b Although a small-diameter tubular incandescent light bulb is used, the present invention is not limited to this, and any suitable lamp can be used. Illustrations of the lamp socket and power supply line are omitted.

Reference numeral 2 denotes a prism plate formed of a transparent plate-like body made of synthetic resin such as acrylic resin or glass, and lamps 4a _, 4b The light emitted by the cutout end 2' enters the light from the end surface of the cutout end 2' and travels to the other end. On the back surface of this prism plate 2, a light reflecting layer 3 is formed by screen printing with ink having a high light reflectance in the form of dots and lamps 4a _, 4b, as shown in FIG. 2(C). They are arranged so that the density increases as the distance from the mounting position increases. That is, the dots are printed so that the diameter and number of dots are changed to gradually increase the distribution density per unit area. This light reflecting layer 3 may be formed in a linear format other than a dot format.

Lamp covers 6a and 6b are arranged to cover the lamps 4a _and 4b, and adjust the amount of light so that the illuminance does not become too high only in the vicinity of the lamps 4a _and 4b. Reference numeral 5 designates a light diffusing plate having fine irregularities formed on its surface and serving as a case for the entire illumination lamp, and is integrally molded into a box shape with only the upper surface open, and the lamps 4a _, 4b are placed inside this box. , prism plate 2, and lamp covers 6a and 6b are housed therein, and the opening is covered by a back cover 7 which also serves as a heat sink. In this case, the back cover 7 and the light diffusing plate 5 formed on the box body are engaged with their respective engaging convex portions 8a and engaging concave portions 8b, so that the lighting lamp 1 can be attached to the vehicle housing. ing.

[0017] Figures 3 (A) and (B) show the lighting lamp 1 configured as described above installed inside the vehicle interior. In FIG. 3(A), the roof portion 9' of the driver's seat 9 is (B) shows a state where it is attached to the center pillar portion 10. but However, it is not limited to this, and for example, it can be attached to the roof of the rear seat or the rear pillar. You can leave it.

[0018] With the above configuration, as detailed in the operation section above, the lamps 4a, 4b (FIG. The light emitted by each of the prism plate 2 enters from the notched end 2' of the prism plate 2 and is directed to the other end. Go ahead. In this case, the light weakens as it moves away from the positions of lamps 4a and 4b. On the contrary, the light reflecting layers are arranged in sequence with high density as the distance from the lamps 4a and 4b increases. As a result of being reflected more by 3, the light becomes uniform over the entire surface of the prism plate 2. The light is emitted while being diffused by the light diffusing plate 5. The lighting light 1 configured in this way is installed in a car. Install it at an appropriate location such as the roof or pillar in both rooms. For this installation Then, attach the back cover 7 to the lighting lamp mounting pedestal (not shown) provided on the vehicle casing with screws 11. The prism plate 2 is fixed to the engagement protrusion 8a of the back cover 7 fixed to the vehicle case. , the lamp 4, and the lamp cover 6 are housed in the engaging recess 8b of the light diffusing plate 5 of the box. They are designed to be installed together.

[0019] FIGS. 4 and 5 show a second embodiment and a third embodiment of the illumination lamp configuration, and the prism The arrangement of the light reflecting layer 3 and the lamp 4 with respect to the plate 2 is shown.

[0020] In FIG. 4, lamps 4 are arranged at both ends of the prism plate 2 in this embodiment. The structure is such that the incident light travels toward the center of the prism plate 2 from both directions. Ru. Therefore, the light reflecting layer 3 is formed sparsely at both ends of the prism plate 2, and at its center. They are closely spaced. This is an effective configuration when you want to increase the illuminance of lighting lights. Ru. A light diffuser in which the prism plate 2 on which the light reflecting layer 3 is formed and the lamp 4 are housed. The configuration in which the plate 5 is engaged with the back cover 7 attached to the vehicle casing by screwing is as follows. This is the same as the first embodiment described above.

[0021] In FIG. 5, in this embodiment, a lamp is attached to one end of the longitudinal direction of the prism plate 2. The light reflecting layer 3 is arranged on the prism plate 2 on which the lamp 4 is arranged. They are arranged sparsely at one end and becoming denser toward the other end. long run Since it uses P4, it can be configured into a relatively small lighting casing while maintaining a constant illuminance. It is Noh. A light in which the prism plate 2 on which the light reflection layer 3 is arranged and the lamp 4 are housed A structure in which the diffuser plate 5 is engaged with a back cover 7 attached to the vehicle casing by screwing. The structure is the same as that of the first embodiment.

[0022]

[Effect of the idea]

As explained above, according to the present invention, the notch of the prism plate to which the light diffusing plate is attached A tubular lamp is arranged at the end, and the lamp light is guided into the prism plate. The lamp light is reflected over the entire surface of the prism plate by the action of the light-reflecting layer arranged sparsely and densely on the back surface. Since the structure is configured to uniformly illuminate the entire area, evenly illuminating a certain area is possible. It can be used as a vehicle interior lighting lamp that can be used as an extremely thin vehicle interior light. It becomes possible to configure it as an indoor lighting lamp.

[Brief explanation of drawings]

[Figure 1] Figures (A) and (B) are diagrams for explaining the principle of the illumination lamp used in the present invention, where Figure (A) is a partial cross-sectional view and Figure (B) is the configuration. FIG. 2 is an exploded perspective view that is disassembled and drawn three-dimensionally to explain the operation in an easy-to-understand manner.

[Fig. 2] Fig. 2 is a diagram showing a first embodiment of the illumination lamp used in the present invention, in which figure (A) is a front view, figure (B) is a longitudinal cross-sectional view, and figure (C) is arranged on a prism plate. FIG. 4 is a diagram showing the arrangement density state of the light reflecting layer and the arrangement state of the lamps.

[Figure 3] Figures (A) and (B) are external views of the illumination lights installed inside the vehicle, with Figure (A) installed on the driver's seat roof and Figure (B) installed on the center pillar. It shows the condition.

FIG. 4 shows a second embodiment of the illumination lamp configuration of the present invention, and shows the arrangement of a light reflecting layer and a lamp with respect to a prism plate.

FIG. 5 shows a third embodiment of the illumination lamp configuration of the present invention, and shows the arrangement of the light reflection layer and the lamp with respect to the prism plate.

[Explanation of symbols]

1. Lighting light 2. Prism plate 2'・Notch end 3. Light reflective layer 4. Lamp 4a/lamp 4b lamp 5. Light diffusion plate 6a・Lamp cover 6b・Lamp cover 7. Back cover 8a・Interlocking convex part 8b/engaging recess 9. Driver's seat 10. Center pillar 11.Screw

Claims (1)

[Scope of utility model registration request] Claim 1: A tubular lamp is disposed at the notched end of the prism plate to allow lamp light to enter the prism plate in a direction perpendicular to the thickness direction of the prism plate to which the light diffusing plate is attached, and 1. A thin interior lighting lamp for a vehicle, characterized in that the lighting lamp has a light reflecting layer on the back surface and the lighting density is increased as the distance from the lamp position increases, and the lighting lamp is attached at an appropriate position for illuminating the interior of the vehicle.