JP2012206603A - Cabin light - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cabin light configured to prevent a size increase of its body and to suppress strength reduction.SOLUTION: The cabin light includes a housing 20 having a light-emitting diode substrate 40 and a substrate mounting surface 21 on which the light-emitting diode substrate 40 is mounted, and a lens 30 which is made of a translucent resin and is attached to the housing 20 to cover the light-emitting diode substrate 40. The substrate mounting surface 21 is provided with positioning ribs 23 formed into a projecting shape corresponding to the outline of the light-emitting diode substrate 40. Each of the positioning ribs 23 has a fastener receiving hole 24 bored thereon, which receives a fastener for fixing the housing 20 in a vehicle.

Description

  The present invention relates to an interior lamp that is a vehicular lamp provided in a room such as a passenger compartment or a luggage compartment of an automobile.

  Conventionally, various interior lights are used to illuminate the interior of an automobile. In the interior lamps, in addition to incandescent bulbs and fluorescent lamps, light emitting diodes have recently been used as light sources. By providing a substrate mounted with a light emitting diode inside the lamp body, it is possible to reduce power consumption and to make the lamp thinner than when a light bulb or a fluorescent lamp is used (for example, see Patent Document 1). reference).

JP 2006-306305 A

  However, if the lamp is made thin, the housing of the lamp becomes a thin box shape, so that the strength is lowered. If the fastener is tightened during installation, the housing may be distorted. In addition, if a reinforcing portion such as a three-dimensional rib is provided in order to increase the strength, the lamp may be increased in size or the accommodation of the substrate may be deteriorated.

  In view of the above circumstances, an object of the present invention is to provide an interior lamp that suppresses a decrease in strength while preventing an increase in size of a main body.

  The interior lamp of the present invention is formed of “a substrate on which a light-emitting diode is mounted, a housing having a substrate mounting surface to which the substrate is mounted, and a light-transmitting material. In the interior lamp comprising a covering lens, the board mounting surface is provided with positioning ribs protruding in a shape corresponding to the outer shape of the board, and fastening for fixing the housing in the car interior A fastener receiving hole for receiving a tool is formed in the positioning rib.

  According to the interior lamp of the present invention, since the positioning ribs that are the positioning structure of the board and increase the strength of the housing are projected on the board mounting surface inside the housing, the strength is increased without increasing the thickness of the main body. Can be increased. Further, since the fastener receiving hole is formed in the positioning rib, a force is applied to the positioning rib when the fastener is tightened, so that the housing is not easily deformed.

  As described above, according to the interior lamp of the present invention, the substrate positioning structure provided inside the lamp also serves as a structure that increases the strength of the housing, thereby preventing a decrease in strength while preventing an increase in the size of the main body. Can do.

The perspective view which shows the interior lamp which is one Embodiment of this invention. Six views of the interior light. The front view of the interior lamp which shows the state which removed the lens. Sectional drawing in A-A '. The perspective view which shows a housing from the board | substrate attachment surface side. The perspective view which shows a housing from the vehicle body attachment surface side. FIG. The perspective view which shows a lens. Six views of the lens.

  Hereinafter, the interior lamp 10 which is one Embodiment of this invention is demonstrated based on FIGS. 1A is a perspective view showing the interior lamp from the lens side, FIG. 1B is a perspective view showing the interior lamp from the vehicle body mounting surface side, and FIG. 2 is a six-view diagram of the interior lamp. FIG. 3 is a front view of the interior lamp with the lens removed, and FIG. 4 is a cross-sectional view taken along line AA ′ in FIG. 5 is a perspective view showing the housing from the board mounting surface side, FIG. 6 is a perspective view showing the housing from the vehicle body mounting surface side, and FIG. 7 is a six-side view of the housing. 8A is a perspective view showing the outer surface side of the lens, FIG. 8B is a perspective view showing the inner surface side of the lens, and FIG. 9 is a six-face view of the lens.

  As shown in FIGS. 1 to 4, the interior lamp 10 mainly includes a housing 20, a lens 30, and a light emitting diode substrate 40. The housing 20 is made of a resin such as ABS, and the lens 30 is made of a light-transmitting resin such as polycarbonate. The interior lamp 10 has a vehicle body mounting surface 22 brought into contact with an interior mounting surface (not shown) of the automobile, and is attached to the indoor mounting surface by a fastener (not shown) such as a screw passed through the fastener receiving hole 24. Fixed. As the installation location of the interior lamp 10, various locations in the vehicle can be appropriately selected as required, such as cabin ceiling, cargo compartment ceiling, trunk lid inner surface, trunk inner side surface, door inner side surface and the like. Here, the light emitting diode substrate 40 corresponds to the “substrate” of the present invention.

  In addition, about the direction of the interior lamp 10, since the orientation changes depending on the installation location, it is only relative, but in the following sentence, the upper, lower, left, and right directions of the interior lamp 10 are directions shown in the drawings to be referred to. Shall be followed. However, for the sake of convenience, the side of the lens 30 that emits light will be referred to as the front in the hexahedral view.

  As shown in FIGS. 5-7, the housing 20 is exhibiting the dish shape provided so that the frame-shaped edge part 26 might surround the baseplate part 20a. On the substrate mounting surface 21 of the bottom plate portion 20a, positioning ribs 23 are projected in a rectangular frame shape along the outer peripheral shape of the light emitting diode substrate 40 (see FIG. 3) inside the edge portion 26. 40 can be received inside. On the extension of the positioning rib 23, claw portions 27 for locking the light emitting diode substrate 40 are provided at four locations, and the positioning rib 23 is provided at the locations where the claw portions 27 are provided. Divided into 4 sections. The positioning rib 23 is provided with two boss portions 23e at positions corresponding to the diagonal lines, and fastening portion receiving holes 24 are formed in the boss portions 23e. A hole 25 through which a wiring can be inserted is formed in the central portion of the board mounting surface 21. Further, when the lens 30 is mounted, four nail receiving portions 28 are provided at the corners of the boundary between the bottom plate portion 20a and the edge portion 26 to engage with the locking claws 31 of the lens 30 and fix the lens 30. ing. A flat vehicle body mounting surface 22 is provided on the back side of the bottom plate portion 20ano substrate mounting surface 21.

  As shown in FIGS. 8 to 9, the lens 30 has a smooth curved dome shape on the outer surface side, and a lens shape for diffusing light on the inner surface side is formed. That is, a large number of bulging portions 33 swelled on the inner surface side like a convex lens are formed on the upper back side of the lens 30, and peaks and valleys are formed at a fine pitch on the inner surface side from the side surface of the lens 30 to the shoulder portion. The strip-shaped cut parts 32 formed alternately are formed. At the lower end of the lens 30, an insertion portion 34 having a small outer shape is provided so as to fit inside the edge portion 26 of the housing 20, and the above-described locking claw 31 is provided on the insertion portion 34. 28 are provided at positions corresponding to 28 respectively.

  As shown in FIGS. 3 to 4, the light emitting diode substrate 40 is equipped with four light emitting diodes 41 and elements such as resistors necessary for lighting the light emitting diodes 41 by power supplied from the vehicle body side. Has been. The light emitting diode substrate 40 is positioned by the positioning rib 23 of the housing 20, abuts on the substrate mounting surface 21, is locked by the four claw portions 27, and is held on the housing 20. Although illustration is omitted, the wiring for supplying power to the light emitting diode substrate 40 is drawn out to the vehicle body mounting surface 22 side through the hole 25 and connected to the power source on the vehicle body side.

  As described above, according to the interior lamp 1 according to the embodiment of the present invention, the positioning ribs 23 project from the board mounting surface 21 to form a positioning structure for the light emitting diode board 40 and increase the strength of the housing. Since the board mounting surface 21 is on the inner side of the interior lamp 1 and the positioning rib 23 is also provided on the inner side and does not protrude to the outside, the strength can be increased without increasing the thickness of the interior lamp 1. . In addition, since the fastener receiving hole 21 is formed in the boss portion 23e of the positioning rib 23, a force is applied to the boss portion 23e when the fastener is tightened for attachment to the vehicle body, so that the housing 20 is deformed. It becomes difficult.

  Moreover, since the edge part 26 and the positioning rib 23 are provided separately, the interior lamp 1 can reduce a possibility that stress concentrates on a specific location during assembly or maintenance. That is, the edge portion 26 bends outward when the lens 30 is attached / detached, and the positioning rib 23 bends outward when the light emitting diode substrate 40 is attached / detached. Compared with the case where the edge portion 26 and the positioning rib 23 are joined and integrally formed, the possibility that the claw portion for locking is damaged due to the stress concentration is reduced.

  In addition, embodiment of this invention is not limited to said structure, As shown below, it can change variously.

  That is, in the above embodiment, the lens 30 has a dome shape. However, the present invention is not limited to this, and the lens 30 may have a flat plate shape or a more complicated shape. There may be. Thereby, this invention is applicable to the lamp corresponding to various attachment locations and uses.

  Moreover, in said embodiment, although the boss | hub part 23e and the fastener acceptance hole 24 were provided in two places, you may provide in three or more places. The more the boss portion 23e and the fastener receiving hole 24 are provided, the higher the rigidity of the housing 20, so that the strength can be improved.

  DESCRIPTION OF SYMBOLS 10 ... Car interior light, 20 ... Housing, 21 ... Board mounting surface, 23 ... Positioning rib, 24 ... Fastener receiving hole, 30 ... Lens, 40 ... Light emitting diode board (board | substrate)

Claims (1)

A substrate mounted with a light emitting diode;
A housing having a substrate mounting surface to which the substrate is mounted;
A lens that is formed of a light-transmitting material, is mounted on the housing, and covers the substrate;
Interior lights with
The board mounting surface is provided with positioning ribs protruding in a shape corresponding to the outer shape of the board,
A vehicle interior light characterized in that a fastener receiving hole for receiving a fastener for fixing the housing in a vehicle is formed in the positioning rib.

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