JP2007106214A - Indoor lighting for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce cost of lighting by making it compact and thin. <P>SOLUTION: A slit 12 is formed by leaving a bent part 11 of one side so as to surround an LED 6 mounted on an FPC 7 and is inclined so that illuminating light of the LED 6 is directed toward a target illuminating area 14 by raising a mounting part 9 of the LED 6 from a point of the slit 12 and bending it by the bent part 11 on the indoor lighting for a vehicle providing a flexible wiring substrate (EPC) 7 on which the LED 6 is mounted in a lamp housing and having a lamp cover attached thereon. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a vehicular interior lighting that projects and irradiates light from a light source LED as spot light.

As vehicle interior lighting using an LED as a light source, one capable of setting a light projecting direction of spot light in any direction in multiple directions is known. In this case, an LED is used as a light source, the LED is arranged in a lamp chamber covered with a lamp cover, a projection opening is provided in the lamp cover, and light from the LED is used as spot light from the projection opening. In a vehicle room lamp that performs projection irradiation, a projection opening is offset with respect to the axis of the lamp chamber (see Patent Document 1).
JP 2002-331868 (page 3, FIG. 1)

  In conventional lighting, a rigid board (printed circuit board) for directing directional LED light toward an object to be illuminated is inclined in the lamp housing, and the LEDs are vertically arranged at both ends of the board. Since it is fixed, the irradiation direction of the LED is determined by the inclination of the substrate. That is, conventionally, the illumination direction of the LED is a direction perpendicular to the substrate. Therefore, in the case of an application such as a map lamp that irradiates obliquely with respect to the axis of the lamp chamber, the substrate itself is inclined and attached. It was difficult to reduce the overall size and thickness, and there was a limit to cost reduction.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide vehicle interior lighting that can be freely tilted without making the LED irradiation direction perpendicular to the entire substrate, and can be reduced in size and thickness to reduce costs. To do.

  In order to achieve the above object, the present invention provides a flexible wiring board (FPC) on which LEDs are mounted on a lamp housing, and surrounds the LEDs mounted on the FPC in vehicle interior lighting with a lamp cover attached. In this way, a cut is formed while leaving one side of the bent portion, the LED mounting portion is raised from the cut portion, bent at the bent portion, and inclined so that the irradiation light of the LED is directed to the target irradiation range. .

  According to the present invention, a flexible wiring board (FPC) on which an LED is mounted on a lamp housing is provided, and in a vehicle interior lighting with a lamp cover attached, one side is bent so as to surround the LED mounted on the FPC. Since the LED mounting part was raised from the cut part and bent at the bent part so that the irradiation light of the LED was directed to the target irradiation range, the mounting position of the entire FPC was changed. In addition, the target irradiation range can be irradiated by freely adjusting the inclination of the portion where the LED is mounted. By using an FPC that is thin and flexible, and because the mounting position of the entire FPC is not tilted as in the past, the overall size of the device is reduced and the cost is reduced. Can be achieved. For example, when an LED is used as a map lamp for reading a map in a passenger compartment, a single objective illumination is used when a rigid substrate mounted with an LED having strong directivity is used to illuminate the target illumination range without using a lens. One rigid board is required for the range. Therefore, reliability increases due to an increase in the number of parts, and costs increase. When the present invention is applied, it is only necessary to tilt the LED mounting portion surrounded by the cut so as to illuminate the target irradiation range. Therefore, it is possible to contribute to improvement in reliability and cost reduction due to the small number of parts while maintaining the thinning.

  Preferred embodiments of the present invention will be described below with reference to the drawings.

  In FIG. 1, a base plate 1 having an inclined base 2 is used as a member constituting a part of the lamp housing, and a lamp cover 3 having a lid 4 and a cylinder 5 on the back surface thereof is used. The example which attached the flexible wiring board (FPC) 7 which mounted LED6 to the said base board 1 is shown. The tilt table 2 has a wedge shape having a predetermined tilt angle and has a mounting rod 8. A positioning hole 10 into which the mounting rod 8 is inserted is formed in a portion 9 on which the LED 6 of the FPC 7 attached to the inclined base 2 is mounted.

  FIG. 2 shows how the FPC 7 is attached to the base plate 1. Two LEDs 6 are mounted on the mounting portion 9 of the LED 6 of the FPC 7, and the mounting portion 9 is raised from the entire FPC 7 and attached to the tilting table 2 to set a predetermined tilt angle. A lamp cover 3 shown in FIG. 3 is attached to the base plate 1. On the back surface of the lamp cover 3, a lid body 4 that is fitted to the inclined base 2 of the base plate 1 is formed. The lamp cover 3 is attached to the base plate 1 by fitting the inclined base 2 into the lid 4. Two cylinders 5 are provided inside the lid 4, and these cylinders 5 cover the LEDs 6. The light of the LED 6 passes through these cylindrical bodies 5 and is irradiated from the light projection window 3 </ b> A of the lamp cover 3 to the target irradiation range 14. A lens is not provided at the position of the projection window 3A.

  FIG. 4 shows an example of the FPC 7 in which a notch 12 is formed so as to surround the mounted LED 6 while leaving a bent portion 11 on one side. Reference numeral 13 in the figure denotes a mounting portion for another functional component. Moreover, although the cut 12 was put in the U shape, it may be a shape such as a semicircle or an ellipse.

  FIG. 5 shows a state in which the mounting portion 9 of the LED 6 is raised from the position of the notch 12 and bent at the bent portion 11, and the bending angle is directed to the target irradiation range 14.

  FIG. 6 shows that when the target irradiation ranges 14 are separately in two directions, two portions 9 on which the LEDs 6 of the FPC 7 are mounted are provided, and the two mounting portions 9 are raised toward the respective target irradiation ranges 14. An example is shown.

  Although the tilting table 2 as shown in FIG. 1 is used as means for holding the rising of the mounting portion 9 at a predetermined angle, the tilting angle of the tilting table 2 can be adjusted. For example, the angle adjustment is performed by cutting and raising the tilt base 2 from the base plate 1 in the same structure as the mounting portion 9 and fixing the tilt base 2 by a means such as attaching a stick at a predetermined angle. Is also possible. Furthermore, a holder or the like may be applied to the back side of the mounting portion 9 without using the tilting table 2.

  As a specific application range of the present invention, indoor lighting (for example, a room lamp or a map lamp mounted on a ceiling, an overhead console) that includes a functional part such as a switch where an irradiation range is limited or thinned is required. Etc.). Moreover, the target irradiation range can be irradiated by the directivity characteristics of the LED without using a lens. The directivity characteristics of the LED were within 30 ° (2θdegree).

The perspective view which shows suitable embodiment of this invention. The perspective view of the state which attached FPC to the base board. The perspective view which shows the back side of a lamp cover. The perspective view of FPC. The perspective view of the state which raised the mounting part of FPC. The perspective view of FPC in case an irradiation direction is two directions.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Base plate 2 Inclined stand 3 Lamp cover 4 Lid body 5 Tube 6 LED
7 FPC
9 Mounting part 11 Bending part 12 Notch 14 Target irradiation range

Claims (3)

In the vehicle interior lighting provided with the flexible wiring board (FPC) on which the LED is mounted on the lamp housing and the lamp cover is attached,
Forming a cut so as to surround the LED mounted on the FPC, leaving a bent portion on one side,
An interior lighting for a vehicle, wherein an LED mounting portion is raised from a cut portion, bent at the bent portion, and tilted so that the irradiation light of the LED is directed to a target irradiation range.   2. A base plate having an inclined base inclined at a predetermined angle is used as a constituent member of the lamp housing, and the LED mounting portion is attached to the inclined base of the base plate along the inclination. The vehicle interior lighting described in 1.   The vehicle interior lighting according to claim 2, wherein a back surface of the lamp cover includes a lid body fitted to the inclined base and a cylinder body covering the LED provided in the lid body. .

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