JPS62213001A - Lighting fixture - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] [Purpose of the invention: [ (Industrial application field) The present invention relates to a lighting fixture equipped with an electronic lighting device.

(Prior Art) For example, spotlights that intensively illuminate paintings in museums or products in stores generally use incandescent light bulbs such as halogen lamps. Since this device does not require parts required for lighting such as a ballast, it can be made compact.

Recently, compact high-intensity discharge lamps such as metal halide lamps have been developed, and spotlights have been constructed using these discharge lamps, but these require a ballast.

As a ballast, a ballast with an electronic circuit was developed, and it is conceivable that the Spotlight i could be equipped with this electronic ballast to make it an integrated ballast.

(Problem to be solved by the invention) However, although electronic ballasts can be made small in size, they are sensitive to heat and the temperature is strictly regulated, so they cannot be installed internally in appliances equipped with discharge lamps such as metal halide lamps. To achieve this, measures must be taken such as making the equipment larger and preventing excessive temperature rises.

The present invention has been made in consideration of two circumstances, and an object of the present invention is to provide a lighting fixture that has a good heat dissipation effect and can be downsized while having an electronic ballast mounted on the fixture body.

[Structure of the invention]

(Failure to solve the problem) The lighting fixture of the present invention has a light projection opening on the front surface.

A device body with a discharge lamp inside, an electronic ballast with lighting components for the discharge lamp including heat-generating parts, and a case housing the electronic ballast with heat radiation holes on the bottom surface. The present invention is characterized in that the electronic lighting device including the electronic lighting device is disposed apart from the electronic lighting device with a heat shield interposed therebetween.

(Function) While the discharge lamp is lit, the heat shield prevents radiant heat from the lamp from being transferred to the electronic lighting device. However, the lighting components that make up the electronic ballast include heat-generating components such as semiconductor switching elements, which generate heat when the discharge lamp is lit.

The ballast is cooled by the tunnel effect in the heat radiation holes formed on the top and bottom surfaces of the cover.

(Example) Two examples of the present invention will be described below with reference to the drawings. Reference numeral 1 denotes a device main body, and this device main body 1 is formed into a rectangular container shape with a light projection opening 2 in front of the front surface of the rice bran.

ing. 3 is a discharge lamp, and this discharge lamp 3 can be a high-intensity discharge lamp such as a double-ended metal halide lamp. Reference numeral 4 represents a reflector disposed on the instrument main body 1. 5
is an electronic lighting device.

This electronic lighting device 5 includes an electronic ballast 6 equipped with lighting components (not shown) for the discharge lamp 3 including heat-generating components such as semiconductor switching elements, and an electronic ballast 6 equipped with heat dissipation holes 7 on the bottom surface. 6, and is arranged on the back side of the instrument main body 1 and spaced apart from the instrument main body 1.

The electronic ballast 6 is formed into a rectangular box shape.

- It is attached to the chassis 1o with an insulator 9 disposed on the side surface, and is covered with a case 8 having heat dissipation holes 7 on the upper and lower surfaces. The electronic ballast 6 is arranged within the case 8 apart from the upper and lower inner surfaces.

Reference numeral 11 denotes a heat shield, and the heat shield 11 is composed of three metal plates 12 spaced apart from each other, and is interposed between the appliance main body 1 and the electronic lighting device 5.

# The appliance main body I, the heat shield 11 and the electronic lighting device 5 are integrally fixed with screws 30 with a curler 13 interposed between them and separated from each other.

Reference numeral 14 is an additional arm, which protrudes from the top surface of the case 6 of the electronic lighting device 5, and has a plug 15 at its tip that connects to a power distribution track installed on the ceiling, etc. Configured to be installed.

Reference numeral 16 denotes a filter provided in the light emitting opening 2 of the device body I. This filter 16 has an ultraviolet blocking layer on one side of a transparent glass substrate and an infrared blocking layer on the other side to prevent excessive temperature rise on the irradiated surface. Prevent.

Moreover, it is designed to prevent discoloration of the irradiated surface.

Next, the effects of the two embodiments will be explained.

The lighting equipment is connected electrically and mechanically by attaching the plug 15 of the arm 14 to a power distribution track arranged on the ceiling or the like. When the discharge lamp 3 is lit in this state, the heat generated from the lamp 3 is blocked by the heat shield 11 and heat transfer to the electronic lighting device 5 is prevented. Although the electronic ballast 6 still generates heat from the heat-generating parts of the parts required for lighting, it is caused by the tunnel surroundings where air flows from the heat radiation holes 7 provided on the bottom of the case 8 to the heat radiation holes 7 provided on the two sides of the case. The electronic ballast 6 can be cooled and an excessive rise in temperature of the electronic ballast 6 can be effectively prevented.

The present invention is not limited to the embodiments described above, but allows for two various modifications. For example, the discharge lamp may be a mercury lamp. Further, the appliance main body and the electronic lighting device may have a shape other than a square, such as a round shape. Furthermore, the heat shield may be one heat shield plate, or may be four or more heat shield plates.

〔Effect of the invention〕

According to the lighting equipment of the present invention, the heat generated from the lamp is effectively prevented from occurring by the electronic ballast by the heat shield, and the heat generated by the ballast itself is also prevented by the heat shield provided on the top and bottom of the case. The heat dissipation holes effectively prevent the temperature of the ballast from rising excessively due to the channel effect, and the appliance main body and electronic lighting device can be placed close to each other, resulting in a compact structure. Moreover, since the electronic lighting device can be integrally constructed with a heat shield interposed in the main body of the device, the structure is simple, manufacturing is easy, and the device can be provided at low cost.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is a partially cutaway side view, FIG. 2 is a perspective view, and FIG. 3 is a perspective view of the electronic lighting with the case removed. 1... Appliance body 2... Light projection opening 3... Discharge lamp 5°°・Electronic lighting device 6...Electronic ballast 7...Radiation hole 8...Case 11・
... Heat shield patent applicant Toshiba Electric Materials Co., Ltd. Representative patent attorney Ono 1) Yoshihiro 3V

Claims (1)

[Claims] (1) A device body with a light projection opening on the front and a discharge lamp inside, an electronic ballast with the lighting parts for the discharge lamp including heat-generating parts, and heat radiation holes on the top and bottom surfaces. It is characterized by comprising: an electronic lighting device that includes a case that houses the electronic ballast and is spaced apart from the appliance body; and a heat shield that is interposed between the appliance body and the electronic lighting device. lighting equipment.