JPH0683480U - Vehicle interior light - Google Patents

Abstract

(57) [Abstract] [Purpose] It is an object to propose a surface-emission type interior light for a vehicle, which has dimming and color-adjusting functions. [Structure] Light from a light source is reflected by a reflector 28, and reflected light is incident on a light guide 27 via one of a diffusion filter 31 and one of rotary filters 32 to 40. The incident light is diffused and reflected by the diffuse reflection layer 26, and the incident light smaller than the critical angle θ is emitted through the outer lens 24 to form a surface-emission type indoor lamp. Filter 32
Rotate ~ 40 and dimm using the desired filter,
The toning function can be exerted.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an interior light, and more particularly to improvement of an interior light for a vehicle such as an automobile.

[0002]

[Prior art]

 2. Description of the Related Art Conventionally, so-called direct-illumination lamps in which a diffuse translucent plate such as an outer lens is arranged in front of a light source are often used for vehicle interior lights.

The above-mentioned direct-lighting type interior light is arranged in a narrow vehicle compartment, and since the light of the ultra-high brightness portion of the light source itself is directly radiated, it has a drawback that it causes glare. Another problem is that the lens surface becomes hot because the light source is located near the outer lens.

Therefore, the present inventor previously applied for Japanese Patent Application No. 4-19045, and proposed a vehicle interior light that eliminates glare due to the presence of a light source and can obtain substantially uniform surface emission.

8 to 11 show a configuration example of the vehicle interior light of the above-mentioned prior application. In the figure, reference numeral 1 denotes a rectangular box-shaped body made of a material such as synthetic resin, which is integrally formed with a frame 2 surrounding the outside thereof. The front of the box-shaped body 1 serves as a light emitting portion 3, a light incident portion 4 is formed on one side surface of the box, and a light source 5 is provided inside the frame outside the light incident portion 4. As the light source 5, an incandescent bulb, a discharge tube, an LED or the like is used.

A diffuse reflection layer 6 is formed on the inner surface of the surrounding portion of the box-shaped body 1 excluding the light emitting portion 3 and the light incident portion 4. The diffuse reflection layer 6 is formed of a white paint, a white resin, a honing metallic luster surface, or the like.

An outer lens 7 is provided on the light emitting portion 3 of the box-shaped body 1. Between the light incident part 4 of the box-shaped body 1 and the light source 5, there is provided a planar fan-shaped reflector 8 for introducing the light of the light source 5 from the light incident part 4 into the box-shaped body 1 as direct light and reflected light. ing. Further, a light diffusion filter 9 is arranged in the light incident section 4.

According to the interior lamp having the above-described structure, as shown in FIGS. 10 to 11, the light from the light source 5 enters the box-shaped body 1 through the reflector 8 and is incident on the inner surface of the box-shaped body 1 in the enclosed portion. The light is reflected by the formed diffuse reflection layer 6, and the reflected light is further diffused by the outer lens 7 and emitted as uniform surface emission. In this case, according to the box-shaped body 1 provided with the light diffusion filter 9 on the light-incident part 4, the light incident on the inner surface of the box-shaped body is uniformly diffused. It is further enhanced.

FIG. 12 shows another configuration example. Reference numeral 10 is a box-shaped body, and a transparent resin plate is used for the box-shaped body 10, and a diffuse reflection layer 11 is formed on the outer surface other than the light emitting portion and the light incident portion. The diffuse reflection layer 11 is formed, for example, by applying light diffusion coating or by covering with a light diffusion reflection plate.

In the above configuration, the light guide body 10 having the diffuse reflection layer 11 on the outer surface functions as a light guide plate generally called and can utilize total reflection, so that the light diffusion uniformity is increased. In the configuration of FIG. 12, even if the outer lens is omitted, uniform surface emission can be obtained as in the example of FIG. 8, but if the outer lens is used, the effect of uniform surface emission can be further enhanced.

[0011]

[Problems to be solved by the device]

 According to the configuration of the prior application described above, (1) a relatively thin configuration is possible. (2) Since the surface emitting light is uniform, the degree of freedom in designing the outer lens is large. (3) The uniform surface emission does not cause unpleasant dazzling. (4) Since the light is indirect light, heat generation on the outer lens surface is small. (5) The uniform surface emission source has a unique design effect. It is possible to obtain a vehicle interior light having effects such as the above.

However, even the vehicle interior light of the prior application does not have the light control and color control functions. P. Light corresponding to O cannot be obtained, and there is still room for improvement in this respect.

An object of the present invention is to provide a vehicle interior light that retains the effects of the above-mentioned prior application and further has dimming and color-adjusting functions.

[0014]

[Means for Solving the Problems]

 In order to achieve the above object, the vehicle interior light of the present invention includes a light source part having a reflector for reflecting the light emitted from the light source, a light emitting part having a diffuse reflection layer inside, and a light emitting part surrounding the above light emitting part. And a filter section that is rotatably provided and guides light from the light source section to the light emitting section, and the filter section is composed of a plurality of or filters having a dimming or toning function of gradation. .

[0015]

[Action]

 In the vehicle interior light of the present invention, the light from the light source unit enters the light emitting unit through the filter unit, is reflected by the diffuse reflection layer, and the reflected light is surface-emitted and the filter unit is appropriately rotated. Light control and color control.

[0016]

【Example】

 An embodiment of the present invention shown in the drawings will be described below. FIG. 1 shows an embodiment of a vehicle interior light of the present invention. In the figure, 21 is an outer housing (cover), 22 is a base portion thereof, 23 is a rotary knob, 24 is an outer lens, 25 is an annular light emitting portion of the outer housing, and a diffuse reflection layer 26 is formed on a part of the inner wall surface thereof. And a circular light guide 27 made of a transparent material is housed and held. Reference numeral 28 is a reflector, 29 is a light source, 30 is a ball type rotary holding unit, 31 is a diffusion filter, and 32 to 40 are annular rotary type light control and color control filters.

The light emitting portion 25, the diffuse reflection layer 26, and the light guide body 27 of the outer housing are assembled as shown in FIG. 2, for example, to form a circular surface light emitting portion 41. It has a section 42.

The filters 32 to 40 are formed on the entire outer circumference of the light emitting unit 25 at equal angles as shown in FIG. 3. For example, the filters 32 to 40 are formed integrally with the outer lens 24, and the bottom surface thereof is a holding unit. Since it is rotatably held by 30, a desired filter can be selectively used by the rotary knob 23 formed on the outer lens.

As these filters, for example, the filters 32, 33, 34, 35 and 36 are color temperature filters having color temperatures of 2600K, 300K, 3400K, 3800K and 4200K, and the filters 37, 38, 39 and 40 are respectively. Use a transmittance filter with a colorless transmittance of 75%, 50%, and 25%. In this way, each filter is of a different type, the number of which is arbitrary, and any suitable method such as printing, printing, sticking, molding, etc. can be used as the method for making it. It is possible to use a dimming and toning function that is close to stepless.

Further, although these filters are provided on the rib portion integrally with the outer lens, they may be provided separately or independently.

The surface emitting action of the above-mentioned interior light is as shown in FIG. 4, and the light from the light source 9 is reflected by the reflector 28, and one of the diffusion filter 31, the dimming filter, and the toning filters 32 to 40. The light is guided to the light guide body 27 via the, and further diffused and reflected by the diffuse reflection layer 26 as shown in the partially enlarged view A, and emitted through the outer lens 24.

In this case, the light incident on the light guide 27 is not emitted unless it is smaller than the critical angle θ, so that internal diffusion progresses and more uniform surface emission is achieved.

Even if the outer lens 24 and the diffusion filter 31 are not provided, the uniformity will be slightly lowered, but there is no practical problem. The diffuse reflection layer 26 may be provided on the light guide 27, or the light emitting section 25 may be formed of a diffuse reflection material. Further, the surface light emitting portion does not necessarily have to be circular, and may have a polygonal shape, for example.

FIGS. 5 and 6 show another embodiment of the present invention in which the light guide 27 is not used, and only the structure of a portion different from FIGS. 1 to 4 is shown. In this embodiment, as shown in FIG. 7, the light transmitted through the filter is only diffusely reflected by the surface emitting portion.

[0025]

[Effect of device]

 As described above, according to the present invention, the following effects can be obtained in addition to the effects of the prior application. (1) Due to the dimming and toning effects of the rotary filter, P. Light corresponding to O is obtained. (2) It is possible to obtain an interior lamp having a dimming and color-adjusting function with a relatively simple, low-cost and highly reliable structure. (3) Since a filter is provided around the light emitting portion, it is possible to use various types of filters. (4) The overall structure can be made relatively thin.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of the present invention and its A-
It is an A line sectional view.

FIG. 2 is a perspective view showing an outline of a surface light emitting unit in the above embodiment.

FIG. 3 is a plan view showing an outline of an annular rotary filter in the embodiment and a side view seen from a direction B thereof.

FIG. 4 is an explanatory view of a surface emitting action in the above embodiment.

FIG. 5 is a plan view and AA showing another embodiment of the present invention.
It is a line sectional view.

FIG. 6 is a perspective view showing an outline of a surface light emitting unit in the embodiment of FIG.

7A and 7B are explanatory views of the surface emitting action in the embodiment of FIG.

FIG. 8 is a plan view of a vehicle interior light showing a configuration example of the prior application.

9 is a cross-sectional view of FIG.

FIG. 10 is an explanatory diagram of a surface emitting action of an interior light.

FIG. 11 is an explanatory diagram of diffuse reflection of the structural portion A of the interior light.

FIG. 12 is a perspective view of a box-shaped body showing another configuration example of the prior application.

[Explanation of symbols]

 21 Outer Housing (Cover) 22 Outer Housing (Base) 23 Rotation Knob 24 Outer Lens 25 Outer Housing (Light Emitting Part) 26 Diffuse Reflecting Layer 27 Light Guide 28 Reflector 29 Light Source 30 Ball-type Rotation Holding Part 31 Diffusion Holder 32-40 Light control, color control filter

Claims (4)

[Scope of utility model registration request] 1. A light source section having a reflector for reflecting light emitted from a light source, a light emitting section having a diffuse reflection layer inside, and a light source section provided rotatably around the light emitting section. A vehicle interior light, comprising: a filter section that guides light to the light emitting section, wherein the filter section is composed of a filter having a plurality of or gradational dimming and toning functions. 2. A light guide member is provided inside the light emitting portion, and the diffuse reflection layer is formed on the light guide member.
Vehicle interior light described in. 3. The vehicle interior light according to claim 1, wherein the light from the light source unit is configured to be guided to the filter unit via a diffusion filter. 4. The vehicle interior light according to claim 2, wherein the light emitting unit has an outer lens, and is configured to emit the reflected light from the diffuse reflection layer through the outer lens. .