JPH056534U - Lighting equipment - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To provide a lighting device having a simple structure and a small size, which can suppress the temperature rise of a ballast to a low level. [Structure] A lighting device main body is arranged with a gap inside a tubular cover whose upper and lower surfaces are opened, and a ballast box is provided at the upper end of the tubular cover, and a ballast box A part of the surface corresponding to the ballast is provided with holes.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improvement of a lighting device.

[0002]

[Prior Art]

 In the past, in buildings with high ceilings such as theaters, public halls, and arenas, lighting devices for raising and lowering are used for replacing lamps or for maintenance and inspection of lighting devices. Recently, in order to emphasize aesthetics, the lighting device is covered with a cover so that the details of the lighting device are not visible.

[0003]

[Problems to be solved by the device]

 By the way, according to the lighting device with the above structure, the ballast used to light the high-pressure discharge lamp is relatively heavy, so either place it on the ceiling of the building or store it inside the ballast storage box. However, it is configured to be supported by a part of the cover of the lighting device. However, when the ballast is placed above the ceiling of the building, when the ballast fails, it takes time to identify the failed ballast, and the ceiling must be opened. There is a drawback that it is troublesome. In addition, the structure in which the ballast is housed inside the ballast housing box has a drawback that the surface temperature of the ballast becomes high due to heat from the high-pressure discharge lamp and self-heating of the ballast, making it unusable.

The present invention has been made in view of the above points, and provides a lighting device that is simple and small in size, can suppress the temperature rise of a ballast to a low level, and can easily perform maintenance and inspection of the ballast and the like. The purpose is to

[0005]

[Means for Solving the Problems]

 The present invention has the following configuration to solve the above problems. In other words, the lighting device main body is arranged inside the tubular cover whose upper and lower surfaces are opened with a gap between the tubular cover and the inner wall of the tubular cover. A ballast will be placed at the top of the tubular cover with a gap inside the ballast box. Further, the ballast box has a hole in a part of the surface corresponding to the ballast.

[0006]

[Action]

 According to the lighting device having the above-described structure, the ballast box located at the upper end of the tubular cover has a hole in a part of the corresponding surface of the ballast box. Outside air flows from the outer wall between the ballast box and the ballast, and the temperature rise of the ballast is low even if it is made small. Also, by opening a part of the ballast box, maintenance and inspection of the ballast can be performed easily.

[0007]

【Example】

 The present invention will be described below with reference to FIGS. In the figure, reference numeral 1 denotes a cylindrical cover having an opened upper and lower surface, which is constituted by combining cylindrical bodies of different sizes in two stages. In addition to the cylindrical body, the hexagonal shape or the quadrangular shape may be used. Reference numeral 2 denotes a main body of the lighting device having a gap 3 inside the tubular cover 1, and is constituted by using, for example, a lighting fixture 4 for raising and lowering. Reference numeral 5 is a ballast box arranged at the upper end of the tubular cover 1, and is formed by arranging a ballast 7 with a gap 6 inside. Further, the ballast box 5 has a hole 8 in a part of the surface corresponding to the ballast. Reference numeral 9 is a supporting arm that is supported by the stabilizer box 5.

According to the above lighting device, the outside air flows between the ballast box and the ballast through the outer wall of the ballast box, and the temperature rise of the ballast can be suppressed to a low level. For example, if a 400 watt high-pressure discharge lamp is housed inside the luminaire 4 and the ballast box 5 is not provided with holes 8, the maximum ballast surface temperature will be 49 ° C. It has been confirmed as a result of an experiment that the maximum surface temperature of the ballast becomes 46 ° C when the hole 8 is provided in the figure.

[0009]

[Effect of the device]

 As described above, the present invention arranges the lighting device main body with a gap inside the cylindrical cover, and also has a hole at a part of the upper end of the cylindrical cover that corresponds to the ballast box. Since it is configured in such a way, the outside air flows between the ballast boxes from the outer wall of the ballast box, and the temperature rise of the ballast can be kept low even if the ballast box is made compact. Have a significant effect. Also, by opening a part of the ballast box, maintenance and inspection of the ballast can be performed easily, and since the lighting fixture is covered by the tubular cover, the desired aesthetic appearance can be obtained. Have.

[Brief description of drawings]

FIG. 1 is a perspective view according to the present invention.

FIG. 2 is a front view of the lighting device of FIG.

FIG. 3 is a plan view of FIG.

[Explanation of symbols]

 1 Cylindrical cover 2 Lighting device body 3 Hole 4 Lighting fixture 5 Ballast box 7 Ballast 8 Hole 9 Support arm

Claims (1)

[Claims for utility model registration] [Claim 1] Inside a cylindrical cover having upper and lower surfaces opened,
The lighting device main body is arranged with a gap between it and the inner wall of the tubular cover, and the ballast is arranged at the upper end of the tubular cover with a gap inside the ballast box. Further, the lighting device is characterized in that a hole is formed in a part of a surface of the ballast box corresponding to the ballast.