JPH0663436U - Vehicle interior light - Google Patents

Abstract

(57) [Abstract] [Purpose] To reduce the thickness of vehicle interior lights while ensuring uniform illuminance, and to eliminate problems caused by heat generated by bulbs. [Structure] Bulbs 4A and 4B are arranged at both ends of a shallow lamp-shaped lamp housing 1, and light from the bulbs 4A and 4B is reflected by a reflector 5 to a front lens 2 arranged in a front opening of the lamp housing. The front lens 2 is provided with a control step 25 for refracting the reflected light from the reflector 5 in a direction perpendicular to the front lens. The axes of the bulbs 4A and 4B are inclined with respect to the longitudinal direction of the lamp housing 1 to make the interior lamp thinner and to secure an illumination area. Bulbs 4A, 4B and inner surface of lamp housing 1 and front lens 2
The heat shields 8 and 9A are interposed between and to improve heat resistance.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an interior light used to illuminate the interior of a vehicle such as an automobile.

[0002]

[Prior art]

 Various types of interior lights have been proposed in the past for illuminating the interior of an automobile, but in particular the interior lights placed on the ceiling of the interior of the vehicle have been made thinner in order to secure a space inside the interior. On the other hand, the illuminance is higher. For this reason, in the conventional indoor lamp, the lamp housing is formed flat, and a plurality of bulbs (light bulbs) are arranged in the lamp housing to achieve a thin structure and high illuminance.

[0003]

[Problems to be solved by the device]

 However, in the conventional room lamp, since the lamp housing is flat, it is unavoidable that the arrangement of the bulb to be installed and the shape of the reflector are limited, and therefore the light emitted from the bulb is made uniform. It becomes difficult to reflect the light and irradiate it from the front lens, resulting in uneven illuminance distribution, which makes it difficult to obtain uniform illuminance. In addition, since the lamp housing is flat, the heat of the bulb easily affects the lamp housing and the front lens, and this heat may cause problems such as deformation and melting. It is an object of the present invention to provide a vehicle interior light that is thin and secures a uniform illuminance, and further eliminates a problem caused by heat generated by a bulb.

[0004]

[Means for Solving the Problems]

 According to the present invention, bulbs are arranged at both ends of a shallow dish-shaped lamp housing, and light from these bulbs is reflected by a reflector toward the front opening direction of the lamp housing and is attached to the front opening. The lens has a control step for refracting the light reflected from the reflector in a direction perpendicular to the front lens. Further, the axis of the bulb is inclined with respect to the longitudinal direction of the lamp housing. Further, a heat shield plate is interposed between the bulb and the inner surface of the lamp housing and the front lens.

[0005]

【Example】

 Next, the present invention will be described with reference to the drawings. FIG. 1 is a partially exploded perspective view of an embodiment of the interior light of the present invention, FIG. 2 is a plan view of the assembled state, and FIG. 3 is a vertical cross section taken along the line AA when assembled in a vehicle. It is a figure. The lamp housing 1 is formed by resin molding or the like into a shallow dish shape having an oval shape, and a front lens 2 formed of a light transmissive resin is fitted and attached to the front opening. The lamp housing 1 has a bottom portion inserted into an oval hole provided in a vehicle ceiling interior material 3, and then a mounting hole 11 (see FIG. 5) provided on a bottom surface of the vehicle housing interior 3 is used to attach the lamp housing 1 to the vehicle ceiling. It is attached to the inner panel 31 etc. A flange 12 is provided on the peripheral surface of the lamp housing 1 so as to cover the boundary between the hole of the interior material 3 and the lamp housing 1.

In the lamp housing 1, bulbs 4A and 4B are arranged inside both ends in the longitudinal direction, and a reflector 5 is arranged at an inner bottom portion of the lamp housing 1 between these bulbs 4A and 4B. . Among the bulbs, one bulb 4A is supported by the socket 6A attached to the lamp housing 1, and the other bulb 4B is supported by the socket 6B attached to the circuit board 7 supported by the lamp housing 1. . The sockets 6A and 6B are oriented substantially parallel to each other along the inner bottom surface of the lamp housing 1, but the plane directions of the sockets 6A and 6B are obliquely arranged in directions different from each other. The supported bulbs 4A, 4B are constructed so that their axes are oriented obliquely to the longitudinal direction of the lamp housing 1. Further, the reflector 5 is composed of two curved reflecting surfaces 5A and 5B which are arranged so that the middle portion in the longitudinal direction of the lamp housing is the highest, and the reflecting surfaces 5A and 5B are the respective bulbs 4A and 4B. It is configured to reflect the light from the light source toward the front opening of the lamp housing 1.

As shown in FIG. 4A, the socket 6A of the one valve 4A is integrally formed with a heat shield plate 8 formed of a heat-resistant metal plate. The lamp is fixed to the housing 1 with screws 81. The heat shield plate 8 is bent into a substantially U shape so that the front face portion 82 and the bottom face portion 83 cover the front face side and the bottom face side of the valve 4A, and the heat generated by the valve 4A heats the front lens 2. Is prevented and the inner bottom surface of the lamp housing 1 is not directly heated. In this case, a hole 17 is opened at a position corresponding to the bulb 4A on the inner bottom surface of the lamp housing 1, and the bottom portion 83 of the heat shield plate 8 is exposed to the bottom side of the lamp housing 1 through the hole 17. The exposed portion is configured to dissipate heat.

Further, the socket 6B of the other valve 4B is mounted on a circuit board 7 as shown in FIG. 4 (b), and this circuit board 7 is formed of a heat resistant resin as a main material. In addition, a heat shield plate 9 and a heat shield wall 91 for preventing the heat of the valve from affecting the front and side circuit boards 7 of the valve 4A are integrally supported in a part thereof. . The heat shield plate 9 is for protecting the front lens 2 located on the front side of the valve 4B from heat, like the heat shield plate 8 of the one valve 4A, and the heat shield wall 91 is a circuit board. This is for protecting various electronic parts 71 mounted on the vehicle 7 from heat. Further, black paint 72 is applied to the surface of the circuit board 7 facing the bulb 4B, and the green coating film provided on the circuit board 7 prevents the bulb light from exhibiting a green color. A main switch 73 and a dimmer switch 74 having a rotary switch structure are provided on the circuit boards 7 on both sides of the bulb 4B. Further, semi-annular caps 41A and 41B are arranged at the front positions of the valves 4A and 4B, respectively. The caps 41A and 41B are made of a light-transmissive resin, and a diffusing step is formed on the arcuate surface of the caps 41A and 41B to diffuse the light from the bulbs 4A and 4B.

On the other hand, the front lens 2 has its peripheral edge portion fitted into the opening of the lamp housing, and the lance 21 provided on the peripheral surface thereof is fitted into the recess 13 provided on the inner peripheral surface of the lamp housing 1. It is attached by letting it. Further, circular holes 22 and 23 through which the main switch 73 and the light control switch 74 are inserted are provided in a part of the front lens 2. At both ends of the inner surface of the front lens 2, light-shielding paint for preventing the bulbs from being seen through from the outside and also preventing the direct light of the bulbs from being radiated to the outside through the front lens. 24 is applied in a strip shape in the lateral direction.

A control step 25 is formed on the inner surface of the front lens 2 for accurately refracting the light reflected by the reflector 5 in a direction perpendicular to the plane direction of the front lens. As will be described later, the control step 25 has a conical shape projecting toward the inner surface, and is arranged so that the apex angle is gradually reduced from both ends of the front lens toward the central portion. . A partition wall 26 is projected at the center of the inner surface of the front lens 2 along the boundary between the two reflecting surfaces 5A and 5B of the reflector 5. The partition wall 26 is for preventing the light of the bulbs 4 and 4B from interfering with each other in the intermediate portion. Here, the partition wall 26 is projected integrally with the front lens 2 and the light is projected onto the surface thereof. A non-transparent paint is applied. The partition 26 does not transmit light, but instead has a reflection step for regulating the reflection angle so that the light from each bulb does not enter the front lens, as will be described later. Good.

On the other hand, as shown in FIG. 5, an outer wall portion 14 is formed on the bottom surface of the lamp housing so as to surround the periphery of the bottom surface, and an outer wall portion 14 is formed. The tongue piece 15 is provided with a lance 16. Then, the cord C electrically connected to the circuit board 7 and the bulbs 4A and 4B is inserted between the bottom surface and the outer wall portion 14, and the cord C is attached to the lamp housing by the elastic force of the tongue piece 15 and the engagement of the lance 16. It is supported by 1.

According to the interior light of this configuration, the light emitted by the bulbs 4A, 4B is reflected toward the front side by the reflection surfaces 5A, 5B of the reflector 5 as shown in FIG. 6A. Is radiated into the vehicle compartment through the front lens 2. At this time, caps 41A and 41B having, for example, a cylindrical diffusion step are arranged at the front positions of the valves 4A and 4B, so that the light from the valves 4A and 4B is emitted as shown in FIG. 6B. Is diffused in the lateral direction of the room light, and makes the illuminance and brightness in this direction uniform. In particular, when a halogen bulb is used as the bulb, unevenness in luminance occurs due to the distorted shape of the tip of the bulb, but this unevenness in luminance is alleviated by diffusion of the cap. Further, since the conical control step 25 is formed on the front lens 2, as shown in FIG. 6C, the reflected light at the central portion is reflected on the front lens due to the surface shape of the reflecting surface of the reflector 5. Even if it is difficult to be perpendicular to the front lens 2, the reflected light is made perpendicular to the front lens 2 by refraction in the control step 25. In this case, the control step 25 has a cone-shaped apex angle smaller in the central portion than in both end portions, so that the effect is enhanced. Note that instead of the control step 25 provided in the front lens 2, a frost process (not shown) is applied to the front surface of the front lens 2, and this frost process spreads the bulb light to obtain a room with uniform illuminance and brightness. It may be configured as a lamp.

Further, in the central portion of the front lens 2, it is difficult for the light from the bulbs 4A and 4B to be perpendicular to the front lens 2, and the light from the bulbs interferes with each other to form a unique illuminance distribution. However, as shown in FIG. 7A, the partition wall 26 provided in the center of the front lens is configured to be non-transmissive to prevent each light from leaking to the opposite side. Light interference is prevented. In this case, instead of constructing the partition wall 26 as a light non-transmissive structure, a partition wall 26A having steps with a triangular cross section is provided as shown in FIG. It is also possible to prevent the light from being refracted in one direction and enter the front lens 2 and prevent mutual interference. Further, since the light-shielding paint 24 that covers the bulbs 4A and 4B is applied to both ends of the front lens 2, the light from the bulbs 4A and 4B is not directly radiated through the front lens 2 into the vehicle interior, The illuminance of the lamp and the brightness of the lens are not too high to cause glare. When the interior light is arranged in the front-rear direction of the vehicle, as shown in FIG. 9, if only the valve located in front of the vehicle, for example, the valve 4B is turned on while the vehicle is traveling, it is possible to operate the vehicle from the valve. Even when the light is emitted toward the opposite side to some extent, the illumination light can be prevented from entering the eyes of the driving vehicle D, which is preferable in terms of safe driving.

On the other hand, FIG. 8A shows a comparison between the case where the bulbs 4A and 4B are inclined with respect to the longitudinal direction of the lamp housing 1 as in this embodiment and the case where they are arranged in parallel. In addition, since the bulb is inclined with respect to the longitudinal direction of the lamp housing, the length dimension of the light-shielding paint 24 formed to cover the bulb is smaller than that when the bulb is arranged parallel to the longitudinal direction. The area can be shortened, and the area S1 of the present embodiment can be increased by comparing the areas S1 and S2 of the irradiation surfaces of the front lenses. Further, FIG. 8B shows a case where the bulb is parallel to the plane direction and inclined in the longitudinal direction of the lamp housing as in the above embodiment, and a case where the bulb is arranged in a vertical position in the lamp housing. Comparing the height dimensions H1 and H2 of the respective lamp housings, the height dimension H1 of the present embodiment can be shortened as compared with the case where the bulbs are arranged vertically, which is advantageous for thinning.

[0015]

[Effect of device]

 As described above, according to the present invention, since the front lens attached to the front opening of the shallow lamp housing is provided with the control step for refracting the reflected light from the reflector in the direction perpendicular to the front lens. Further, the front lens can be uniformly illuminated with the light from the bulb, and good illumination can be performed without unevenness in illuminance and unevenness in the brightness of the lens. In addition, by inclining the axis of the bulb with respect to the longitudinal direction of the lamp housing, it is possible to reduce the thickness of the interior lamp, and at the same time, increase the illumination area to achieve highly effective illumination. Furthermore, by interposing a heat shield plate between the bulb and the lamp housing and front lens, it is possible to alleviate the influence of heat generated by the bulb on the lamp housing and front lens, and improve the heat resistance of the indoor lamp. There is an effect that can be.

[Brief description of drawings]

FIG. 1 is a partially exploded perspective view of an embodiment of an interior lamp of the present invention.

FIG. 2 is a plan view in which a part of the interior light of FIG. 1 is cut away.

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

FIG. 4 is a perspective view showing a configuration near each valve.

FIG. 5 is a perspective view of the bottom surface of the interior lamp.

FIG. 6 is a diagram showing a light irradiation state of an interior light.

FIG. 7 is a diagram showing a state of light in a central portion of a front lens.

FIG. 8 is a diagram comparing valve mounting directions.

FIG. 9 is a schematic diagram showing an example of selectively lighting a bulb.

[Explanation of symbols]

 1 Lamp Housing 2 Front Lens 4A, 4B Valve 5 Reflector 7 Circuit Board 8 Heat Shield 9 Heat Shield 24 Light Shielding Paint 25 Control Step 26 Partition 41A, 41B Cap

Claims (3)

[Scope of utility model registration request] 1. A lamp housing in the shape of a shallow dish, bulbs respectively arranged at both ends of the lamp housing, and light disposed between the bulbs and directed from the bulbs toward a front opening direction of the lamp housing. An interior light including a reflector for reflecting light by a front lens and a front lens attached to the front opening, wherein the front lens is provided with a control step of refracting light reflected from the reflector in a direction perpendicular to the front lens, or A vehicle interior light that has been frosted. 2. The vehicle interior light according to claim 1, wherein the axis of the bulb is inclined with respect to the longitudinal direction of the lamp housing. 3. A heat shield plate is interposed between the bulb and the inner surface of the lamp housing and the front lens.
Vehicle interior light.