JPS62213002A - 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 stores generally use incandescent light bulbs such as Rogen lamps. Since this device does not require parts required for lighting such as a ballast, it can be made compact.

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

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

(Invention 75: %I!i' Problem to be resolved) However, although electronic ballasts can be made smaller and lighter, they are weak against heat and the temperature is strictly regulated, so a discharge lamp such as a metal halide lamp is installed. In order to install it inside a heated appliance, it is necessary to take measures such as making the appliance large and preventing excessive temperature rise.

The electronic ballast is attached to the chassis, and since the chassis is generally made of a metal plate, it may have a double insulation structure via an insulator. However, conventionally, a double structure is known in which a plate-shaped insulator is interposed between the electronic ballast and the chassis, but in this case, the chassis and the electronic ballast are in close proximity. There is a risk that the temperature will rise excessively due to the heat generated by the ballast itself.

The present invention was made in consideration of two circumstances: the electronic ballast is mounted on the main body of the device, the heat dissipation effect is good, and the electronic ballast is mounted on the chassis. To provide a lighting equipment which can effectively prevent an excessive temperature rise of a ballast when the ballast is heated, and can also provide a sufficient insulation distance.

[Structure of the invention]

(Means for Solving the Problems) The lighting equipment of the present invention has a main body that has a light emitting opening on the front and a discharge lamp arranged inside, a chassis made of a metal plate, and a discharge lamp that includes a heat generating part. This electronic ballast is equipped with the necessary parts for lighting and is mounted on the chassis.The electronic ballast is mounted on the chassis on the side, and the electronic ballast is attached to the chassis.

(Function) Since the electronic ballast of the electronic lighting device is mounted on the chassis, the radiant heat from the lamp is cut off by the ventilation path, and the heat transfer to the electronic ballast is cut off, as well as the heat generated by the electronic ballast itself is also vented. The heat is dissipated by the circuit and cools the electronic ballast.

Moreover, a sufficient insulation distance can be maintained between the chassis and the electronic ballast by a spacer made of an insulator, and there is no risk of insulation failure.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings. Reference numeral 1 denotes a device body, and this device body 1 has a light projection opening 2 on the front surface and is formed in the shape of a rectangular container. 3 is a discharge lamp,
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. Reference numeral 5 denotes an electronic lighting device, and the electronic lighting device 5 includes a chassis 6 made of a metal plate, and an electronic ballast equipped with lighting components (not shown) for the discharge tube 3 including heat-generating components such as semiconductor switching elements. 7. The electronic ballast 7 is mounted on the chassis by including a spacer 8 made of an insulator provided on the surface side and attached to the chassis 6 by forming a ventilation path A between the electronic ballast 7 and the chassis 6. 1 and a chassis 6 provided in the instrument body 1.
A hole 9 is provided on the plate surface for mounting a mounting screw 30 to be attached to the instrument main body 1, which will be described later, and a mounting piece 10 is provided upright on the edge. The spacer 8 has an elongated rod shape, and the spacer 8 has two recesses 11 in the middle part of which form a ventilation path A between the spacer 8 and the plate surface of the chassis 6. There is also a ventilation path A between these two spacers 8.
is formed. The electronic ballast 7 has both side ends of the spacer 8 connected to the mounting piece 10 of the chassis 6, and the electronic ballast 713 is a heat shield, and this heat shield 13 consists of three plates spaced apart from each other and facing each other. It is made up of a metal plate I4 and is interposed between the appliance main body 1 and the electronic lighting device 5.

The appliance main body 1, the heat shield 13, and the electronic lighting device 5 are fixed integrally with screws 30, separated from each other with a curler 15 interposed therebetween.

Reference numeral 16 denotes an arm for mounting, and the arm 16 is mounted so as to protrude from the upper surface of the case 12 of the electronic lighting device 5. 17
is a filter provided in the light emitting opening 2 of the device body 1, and this filter 17 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. In addition, the irradiated surface is prevented from discoloring.

Next, the operation of this embodiment will be explained.

When the discharge lamp 3 is lit, the heat generated from the lamp 3 is cut off by the heat shield 13 and the air passage A formed between the chassis 6 and the electronic ballast 7.
Heat transfer to is inhibited. In addition, although heat is generated from the heat-generating parts of the electronic ballast 7 that are required for lighting, excessive temperature rise of the electronic ballast 7 is prevented by ventilation to the ventilation path A formed between the chassis 6 and the electronic ballast 7. can be prevented. The electronic ballast 7 has a double insulation structure with the spacer 8, and can maintain a sufficient insulation distance3.In this embodiment, the spacer 8 is provided opposite the mounting screw 30, so The insulation distance is also sufficient.

The present invention is not limited to the embodiments described above, but allows various modifications. For example, the discharge lamp may be a mercury lamp. In fact, the spacers are not limited to rod shapes; for example, hook-shaped spacers may be provided at the four corners of the electronic ballast.

Furthermore, the heating element may be omitted.

〔Effect of the invention〕

According to the lighting device of the present invention, the heat generated from the lamp is cut off by the ventilation path formed between the chassis of the electronic lighting device and the electronic ballast, and the heat generated by the ballast itself is also blocked by ventilation. Cooling by the passage can effectively prevent the temperature of the ballast from rising too high, and the appliance main body and electronic lighting device can be placed close to each other, allowing for a compact configuration. Moreover, there is a sufficient insulation distance between the chassis and the electronic ballast, and there is no risk of insulation failure.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which Fig. 1 is a partially cutaway side view, Fig. 2 is a perspective view, Fig. 3 is an exploded perspective view of the electronic lighting device with the case removed, and Fig. 4 is an exploded perspective view. It is also a perspective view. 1. Fixture body 2. Light projection opening 3. Discharge lamp 5. Electronic lighting device 6. Chassis
7...Electronic ballast 8...Spacer A...
Air Channel Patent Applicant Toshiba Electric Materials Co., Ltd. Representative Patent Attorney Ono 1) Yoshi Hirotaka Commissioner of the Correction Office Tono 29 Name of Invention Lighting Equipment 3 Relationship to the Amendment Person Case Patent Applicant 1-4 Mita, Minato-ku, Tokyo No. 28 (375) Toshiba Electric Materials Corporation Representative Tsutomu Tsuruo 4, Representative 1-201-1 Funakoshi-cho, Yokosuka City, Kanagawa Prefecture 237 Toshiba Electric Materials Corporation Yokosuka Plant 5, Supplement 1 subject details and Drawing 6, Contents of amendment <1) The entire text of the specification is corrected as shown in the attached sheet (engraving, no change in content). (2) The drawings are corrected as shown in the attached sheet (engraving, no changes to the contents). that's all

Claims (1)

[Claims] (1) A device body that has a light projection opening on the front and a discharge lamp inside, a chassis made of a metal plate, and an electronic device that has lighting components for the discharge lamp including heat-generating components and is attached to the chassis. A ballast, provided on the main body of the device, including a spacer made of an insulating material, which is provided on the chassis mounting surface side of the electronic ballast and is attached to the chassis by forming a ventilation path between the electronic ballast and the chassis. A lighting fixture characterized by comprising: an electronic lighting device;