JP2008108517A - Lighting system, and luminaire using it - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lighting system capable of ensuring attachment strength of a body and a cover, and of providing a sufficient arrangement space for ensuring insulation distances among components constituting light emitting devices without increasing the size of the device, and to provide a luminaire. <P>SOLUTION: This lighting system A comprises: the body 2 formed into a nearly-cylindrical shape, and having a plurality of light emitting devices 1 mounted on one end surface in the axial direction in a form thermally coupled to one another; and the cover 3 attached to the one end surface of the body 2, and having light distribution parts 4 controlling the light emitted from the light emitting devices 1. In the lighting system, pins 30 arranged on the cover 3 are inserted into and welded to mounting holes 20 formed through the body 2, and lock parts 31 formed with circumferential edge of the cover 2 are locked over the whole circumferential edge of the body 2, whereby the cover 3 is mounted to the body 2. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a lighting device including a light emitting device using an LED chip and a lighting fixture using the lighting device.

  Conventionally, LED chips emit light by combining LED chips and wavelength conversion materials (for example, fluorescent pigments, fluorescent dyes, etc.) that are excited by light emitted from the LED chips and emit light of a different emission color from the LED chips. Research and development of light-emitting devices that emit light having a color different from that of color are being performed in various places (for example, see Patent Document 1). As this type of light-emitting device, for example, a white light-emitting device (generally called a white LED) that obtains white light (white light emission spectrum) by combining an LED chip that emits blue light or ultraviolet light and a phosphor. When such a white light emitting device is used for an application that requires a relatively large light output such as general illumination, a desired light output cannot be obtained with one white light emitting device. In general, an illuminating device in which a plurality of white light emitting devices are mounted on one wiring board is configured so that a desired light output is ensured in the entire illuminating device.

In an illuminating device in which a plurality of light emitting devices are mounted on one wiring board, although the amount of heat generated by each light emitting device is relatively small when each light emitting device is lit, heat is generated as the number of light emitting devices increases. Since the amount increases, heat tends to accumulate on the wiring board, and the temperature of the entire lighting device tends to rise. Therefore, for example, there is known an illumination device that efficiently dissipates heat generated by a light emitting device by mounting the light emitting device on one end surface of a substantially box body made of a heat sink made of aluminum die casting. Such an illuminating device includes a cover that has a light distribution unit that controls light emitted from the light emitting device and is attached to cover the body, and a plurality of pins that protrude from the surface of the cover facing the body The cover is attached to the one end surface of the body by being inserted into an attachment hole penetrating the one end surface of the body and thermally welded.
JP 2005-158963 A

  By the way, in the above conventional example, when the number of pins of the cover and the number of mounting holes of the body are small, there is a possibility that stress due to an external force concentrates on the pins and the cover is detached from the body. Therefore, in order to sufficiently secure the mounting strength of the body and the cover, it is necessary to increase the number of pins of the cover and the number of mounting holes of the body. However, when the number of mounting holes in the body is increased, the arrangement space for the light emitting device on the one end surface of the body is narrowed, and in order to obtain a sufficient arrangement space for securing the insulation distance between the components constituting the light emitting device. Had the problem that the lighting device had to be designed large.

  The present invention has been made in view of the above points, and is sufficient to ensure the mounting strength of the body and the cover, and to ensure the insulation distance between the components constituting the light emitting device without increasing the size of the device. An object of the present invention is to provide a lighting device and a lighting fixture capable of obtaining a sufficient arrangement space.

  In order to achieve the above object, the invention of claim 1 is mounted in a form in which one or a plurality of light emitting devices using LED chips and a light emitting device are thermally coupled to one end surface formed in a substantially box shape. A lighting device comprising a body and a cover attached to the one end surface of the body and having a light distribution part for controlling light emitted from the light emitting device, and the body and the cover are fixed to each other by heat welding The fixed portion and the fixed portion to be fixed are provided, respectively, and a locking portion for locking to the outer peripheral edge of the body is provided on the outer peripheral edge of the cover.

  According to a second aspect of the present invention, there is provided the lighting device according to the first aspect, and an appliance main body that houses the lighting device.

  According to the first aspect of the present invention, the cover is locked to the outer peripheral edge of the body by the locking portion provided on the outer peripheral edge of the cover, thereby reducing the stress applied to the fixed portion and the fixed portion by an external force. Therefore, the mounting strength of the body and the cover can be ensured even if the number of the fixing parts and the fixed parts is reduced, so that the insulation between the components constituting the light emitting device can be achieved without increasing the size of the apparatus. An arrangement space necessary for securing the distance can be obtained.

  According to invention of Claim 2, the lighting fixture using the illuminating device which has the effect of Claim 1 is realizable.

  Hereinafter, the lighting fixture of embodiment of this invention is demonstrated using drawing. In the present embodiment, as shown in FIG. 1, a plurality of (four in this embodiment) light emitting devices 1 are thermally coupled to one axial end surface (upper surface in FIG. 1). A lighting device A including a body 2 to be mounted and a cover 3 having a light distribution unit 4 that is attached to the one end surface of the body 2 and controls light emitted from the light emitting device 1, and the lighting device A are attached. An instrument body 5 and an arm 6 (see FIG. 3 (a)) having one end attached to a fixture body (not shown) attached to the ceiling and connected to the other end are provided with the arm 6 (see FIG. 3A). Yes. In addition, illustration of the light-emitting device 1 mentioned later is abbreviate | omitted in the same figure.

  As shown in FIG. 2B, the light emitting device 1 includes an LED chip (not shown), a mounting substrate 10 mounted on one surface side of the LED chip, and a mounting surface side of the LED chip in the mounting substrate 10. A frame (not shown) surrounding the LED chip, a sealing part (not shown) that is formed by filling the inside of the frame with a light-transmitting material and seals the LED chip, and is superimposed on the sealing part And a lens (not shown) arranged with a transparent material that is excited by light emitted from the LED chip and transmitted through the sealing portion to emit light of a color different from the emission color of the LED chip together with a transparent material It is a molded product and comprises a dome-shaped color conversion member 11 that covers the lens on the light emitting surface side of the lens and is disposed in such a manner that an air layer is formed between the light emitting surface and the frame.

  The LED chip is composed of a GaN-based blue LED chip that emits blue light, and the color conversion member 11 is excited by a light-transmitting material such as a silicone resin and blue light emitted from the LED chip and transmitted through the sealing portion. It is composed of a molded product of a mixture obtained by mixing particulate yellow phosphors emitting broad yellow light. Therefore, in the light emitting device 1 in the present embodiment, the blue light emitted from the LED chip and the light emitted from the yellow phosphor are emitted through the outer surface of the color conversion member 11, and white light can be obtained. . Note that the emission color of the LED chip is not limited to blue. For example, when an ultraviolet LED chip is used as the LED chip, a color conversion member 11 containing, for example, a red phosphor, a green phosphor and a blue phosphor is used. Thus, white light may be obtained.

  The body 2 is a heat sink made of aluminum die casting, and two substantially rectangular screwing portions 21 screwed to a bridge portion 52 described later are provided on the outer peripheral edge of the one end surface in FIG. Each of the screwing portions 21 has an insertion hole 21a having a substantially circular cross section that is overlapped with a female screw portion 52a of a bridge portion 52 to be described later and into which an assembly screw 54 is inserted. It is penetrated in the direction. Further, on the one end face of the body 2, attachment holes 20 having a substantially circular cross section are provided in the thickness direction in the vicinity of the inside of each bridge portion 52a, and a pin 30 of the cover 3 to be described later is inserted. Further, a substantially L-shaped wire insertion portion 23 through which a later-described electric wire B is inserted extends from approximately the center of the one end surface of the body 2 to the left side surface in FIG.

  The part provided with the attachment hole 20 is formed thinner than the other part of the body 2, and the lower side of the part in FIG. 1 is a recessed part 22 that is recessed in the thickness direction. Thus, when the pin 30 is inserted into the mounting hole 20, the tip of the pin 30 is exposed to the recess 22, and the cover 3 is attached to the body 2 by heat-welding the tip of the pin 30 to the body 2. It is attached (see FIG. 2 (c)).

  The cover 3 is formed in a bottomed cylindrical shape having an opening at the other end face, and four light distribution portions 4 each having a substantially bowl shape made of a translucent material are provided on the one end face (see FIG. 1). The light distribution unit 4 is disposed so as to face the corresponding light emitting device 1 in a state where the cover 3 is attached to the body 2, and controls light distribution from each light emitting device 1. A pair of rod-shaped pins 30 that are opposed to the mounting holes 20 of the body 2 and protrude downward in FIG.

  Here, the cover 3 is formed so that the inner diameter of the opening surface on the other end side is longer than the inner diameter of the one end surface, and the side surface of the cover 3 is inclined outward from the upper side to the lower side in FIG. It has become. Therefore, when the cover 3 is attached to the body 2, the outer peripheral edge of the cover 3 becomes the locking portion 31 and locks over the entire periphery of the outer peripheral edge of the body 2, so that force is applied to the lighting device from the outside. However, the stress applied to the pin 30 can be reduced by dispersing the stress due to the external force.

  The appliance body 5 is made of aluminum die-casting, and as shown in FIG. 3A, a device holding portion 50 that is formed in a bottomed cylindrical shape and houses the lighting device A, and an outer diameter larger than the device holding portion 50. A large-diameter cylindrical part 51 that is formed in a cylindrical shape and surrounds the outer periphery of the apparatus holding part 50 and is arranged concentrically with the apparatus holding part 50, and the apparatus holding part 50 and the large-diameter cylindrical part 51 are spaced apart from each other by a predetermined distance. It consists of four bridge portions 52 that are connected to each other and an arm coupling portion 55 that is attached to the upper side of the outer periphery of the large-diameter cylindrical portion 51 in FIG. In addition, four vent holes 53 penetrating in the axial direction are formed between the apparatus holding portion 50 excluding the bridge portion 52 and the large-diameter cylindrical portion 51, and air flows through the vent holes 53. By forming the path, the heat generated in the light emitting device 1 can be efficiently radiated.

  As shown in FIG. 3A, the bridge portion 52 is formed integrally with the device holding portion 50 and the large-diameter cylindrical portion 51. In the center of the left and right bridge portions 52 in FIG. A female screw portion 52a is provided for each. Thus, as shown in FIG. 3B, the screwing portion 21 of the body 2 is placed on the upper surface of the bridge portion 52 in FIG. 3B, and the assembly screw 54 is inserted through the insertion hole 21a. The body 2 of the lighting device A is attached and fixed to the fixture body 5 by screwing with the female screw portion 52a. A recess 32 having a diameter larger than the diameter of the head of the assembly screw 54 is provided in the vicinity of the bridge portion 52 and the screwing portion 21 on the side surface of the cover 3. Thus, by providing the recessed part 32 which avoids the assembly screw 54, the outer diameter of the large diameter cylindrical part 51 can be made small compared with the case where the recessed part 32 is not provided, Therefore Size reduction of the instrument main body 5 can be achieved.

  As shown in FIG. 1, the arm coupling portion 55 is led out from a bearing portion 55a through which a bearing hole through which a shaft screw (not shown) is inserted and a separate power supply unit (not shown). It consists of a notch 55b through which the electric wire B is inserted. The instrument body 5 is formed by superimposing the bearing holes of the bearing portion 55a and the bearing holes (not shown) provided at the lower end portion of the arm 6 in FIG. 3A, and inserting shaft screws into these bearing holes. By being stopped, it is coupled to the arm 6 so as to be rotatable about a shaft screw. Further, the electric wire B is connected to a power supply conductor pattern (not shown) provided on the mounting substrate 10 of the light emitting device 1 through the internal space of the arm 6, the cutout portion 55 b of the arm coupling portion 55, and the electric wire insertion hole 23 of the body 2. As a result, driving power is supplied to the light emitting device 1.

  As described above, when the cover 3 is fixed to the body 2, the locking portion 31 formed by the outer peripheral edge of the cover 3 is locked over the entire outer peripheral edge of the body 2, so that a force is applied to the lighting device from the outside. Even if added, stress due to external force can be dispersed and the stress applied to the pin 30 can be reduced, so that the mounting strength of the body 2 and the cover 3 can be reduced even if the number of pins 30 and mounting holes 20 is reduced. It can be secured sufficiently. In addition, since the number of mounting holes 20 can be reduced on the one end surface of the body 2, it is necessary to secure an insulation distance between components constituting the light emitting device 1 without increasing the size of the lighting device. A large arrangement space can be obtained.

It is a disassembled perspective view which shows a part of lighting fixture of embodiment of this invention. It is a figure which shows an illuminating device same as the above, (a) is the figure seen from the cover side, (b) is an AA 'sectional view taken on the line, (c) is a partially broken BB' sectional view It is an arrow view. It is the schematic same as the above, (a) is the figure seen from the cover side, (b) is the C-C 'sectional view taken on the line C-C' partially broken.

Explanation of symbols

1 Light Emitting Device 2 Body 20 Mounting Hole (Fixed Part)
3 Cover 30 pin (fixed part)
31 Locking part 4 Light distribution part

Claims (2)

  One or a plurality of light emitting devices using LED chips, a body formed in a substantially box shape and mounted in a form in which the light emitting device is thermally coupled to one end surface, and attached to the one end surface of the body from the light emitting device A lighting device comprising a cover having a light distribution unit for controlling emitted light, wherein the body and the cover are each provided with a fixed portion and a fixed portion that are fixed to each other by heat welding. An illuminating device characterized in that a locking portion for locking to the outer peripheral edge of the body is provided on the outer peripheral edge.   A lighting fixture comprising: the lighting device according to claim 1; and a fixture main body that houses the lighting device.

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