JP2000231824A - Pendant circular fluorescent lamp luminaire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a shade from excessively approaching a circular fluorescent lamp and to reduce gloominess on the backside of a luminaire body. SOLUTION: A luminaire body 20 is provided to house, components of a lighting circuit. A suspending accessory 10 is provided for suspending the luminaire body 20 from the surface of the ceiling. A circular fluorescent lamp 40 is provided and horizontally disposed so as to surround the luminaire body 20 and to stand near the lower side thereof. The circular fluorescent lamp 40 is of a double ring type made up by concentrically disposing a smaller ring- diameter luminous tube 41 and a larger ring-diameter luminous tube 42 and linking them to each other. A shade 30 is provided and detachably mounted on the periphery of the luminaire body 20 for covering the circular fluorescent lamp 40 from the upper side thereof. Arm pieces 51 are provided and fixed to the luminaire body 20, and they extend toward the circular fluorescent lamp 40. A lamp holding piece 52 for detachably holding the circular fluorescent lamp 40 is formed on the lower surface side of each arm piece 51. An approach- preventing piece 53 is formed on each arm piece 51 for preventing the shade 30 from excessively approaching the circular fluorescent lamp 40.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hanging annular fluorescent lamp apparatus using a double annular annular fluorescent lamp.

[0002]

2. Description of the Related Art A double ring-shaped annular fluorescent lamp is of a high output type, and the temperature of a lamp tube wall, particularly a lamp filament portion, becomes high. For this reason, if the shade comes off and comes into contact with or comes in close proximity to the annular fluorescent lamp, the shade may be thermally deformed. In the conventional annular fluorescent lamp fixture, the fixture main body is set to be larger than the lamp ring diameter, and even if the shade drops, the fixture does not hit the annular fluorescent lamp and a required distance is secured.

[0003]

In the above conventional apparatus, since the outer periphery of the apparatus main body is large, light from the annular fluorescent lamp in the direction of the apparatus main body or the rear of the apparatus main body is almost blocked. Accordingly, a wide area of darkness occurs on the ceiling surface in that direction, which impairs the commercial value. SUMMARY OF THE INVENTION An object of the present invention is to prevent the shade and the annular fluorescent lamp from approaching too far, and to alleviate the darkness in the rear direction of the appliance body.

[0004]

SUMMARY OF THE INVENTION A hanging annular fluorescent lamp apparatus of the present invention includes an apparatus main body for housing lighting circuit components.
There is provided a suspending tool for suspending the device main body from a ceiling surface. An annular fluorescent lamp is provided so as to surround the apparatus main body and be horizontally arranged near a lower side thereof. The annular fluorescent lamp is of a double ring type in which a small ring diameter arc tube and a large diameter arc tube are concentrically arranged and connected. A shade is detachably attached to a peripheral edge of the apparatus main body and covers the annular fluorescent lamp from above. An arm piece fixed to the fixture body and extending therefrom in the direction of the annular fluorescent lamp.
A lamp holding piece for detachably holding the annular fluorescent lamp is formed on a lower surface side of the arm piece. An access preventing piece for preventing an excessive approach between the shade and the annular fluorescent lamp is formed on the arm. For example, the arm piece is appropriately extended outward, and the extended portion is used as an access prevention piece.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A description will be given with reference to FIGS. The illustrated hanging-type annular fluorescent lamp fixture according to the present invention includes a fixture main body 20 for storing a lighting circuit component (not shown). A hanging tool 10 for hanging the apparatus body 20 from a ceiling surface is provided. An annular fluorescent lamp 40 is provided so as to surround the apparatus main body 20 and be horizontally arranged near the lower side thereof. Annular fluorescent lamp 4
Numeral 0 denotes a double ring type in which the small ring diameter arc tube 41 and the large diameter arc tube 42 are concentrically arranged and connected. A shade (30) is detachably attached to the periphery of the device body (20) and covers the annular fluorescent lamp (40) from above. An arm piece 51 is provided which is fixed to the instrument body 20 and extends therefrom in the direction of the annular fluorescent lamp 40. On the lower surface side of the arm piece 51, a lamp holding piece 52 for detachably holding the annular fluorescent lamp 40 is formed. The arm 51 is provided with an access preventing piece 53 for preventing an excessive approach between the shade 30 and the annular fluorescent lamp 40. Supplementary information on structure, etc. The hanging tool 10 is a cord hanging type. The annular fluorescent lamp 40 that is horizontally arranged so as to surround the apparatus main body 20 and toward the lower side thereof is slightly larger than the surrounding apparatus main body 20. There are two arm pieces 51. A part of the arm piece 51 is extended outward, and the extended part is defined as an approach prevention piece 53. When the seed 30 falls off, it hits the approach preventing piece 53 and does not approach the annular fluorescent lamp 40 any more. The approach prevention piece 53 is like a kind of eaves.

The instrument body 20 includes a top plate 21 and a reflector 22 which also serves as an outer shell. The seed 30 is made of a synthetic resin.
The lamp holding piece 52 detachably holds the annular fluorescent lamp 40 mounted from below. The arm piece 51 has a size as large or small as is necessary for holding the lamp holding piece 52,
If the access preventing piece 53 is not provided, contact / over-approach between the shade 30 and the annular fluorescent lamp 40 may occur. FIG. 2 illustrates a typical falling form of the shade 30. FIG.
In addition to the above case, even if the shade 30 is further displaced, no contact or excessive approach between the shade 30 and the annular fluorescent lamp 40 occurs. A constant distance from the annular fluorescent lamp 40 is maintained by the eaves effect of the approach prevention piece 53. The appliance body 20 is extremely small, and the annular fluorescent lamp 40 is large. Therefore, the degree to which the annular fluorescent lamp 40 is blocked by the appliance body 20 is small, and the amount of light traveling toward the back side of the appliance body 20 is relatively increased.

[0007]

According to the present invention, a large amount of light is directed toward the instrument body, and the darkness generated in that direction can be reduced. Therefore, the commercial value is high. Further, since the shade does not approach the annular fluorescent lamp excessively, the shade is less likely to be thermally deformed, and the safety is improved.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a hanging-type annular fluorescent lamp apparatus according to the present invention.

FIG. 2 is an explanatory view showing the situation of shade drop.

[Explanation of symbols]

 Reference Signs List 10: Hanging device 20: Instrument body 21: Top plate 22: Reflector plate 30: Shade 40: Ring-shaped fluorescent lamp 41: Small ring-shaped light emitting tube 42: Large diameter light-emitting tube 51: Arm piece 52: Lamp holding piece 53: Access prevention piece

Claims (1)

[Claims] An apparatus body for storing a lighting circuit component is provided.
The apparatus main body is provided with a suspending tool for suspending the apparatus main body from a ceiling surface, and an annular fluorescent lamp is provided so as to surround the apparatus main body and be horizontally positioned toward a lower side thereof, and the annular fluorescent lamp is a small ring-shaped arc tube. A double-ring type in which large-diameter arc tubes are concentrically arranged and connected, the shade including a shade detachably mounted on a peripheral edge of the instrument body and covering the annular fluorescent lamp from above, and fixed to the instrument body. And an arm piece extending therefrom in the direction of the annular fluorescent lamp. A lamp holding piece for detachably holding the annular fluorescent lamp is formed on a lower surface side of the arm piece, and the shade / annular fluorescent light is provided on the arm. A suspended ring-shaped fluorescent lamp apparatus, wherein an approach preventing piece for preventing excessive approach between lamps is formed.