Lighting apparatus
First Claim
Patent Images
1. A lighting apparatus comprising:
- a circular fluorescent lamp unit having inner and outer circular portions arranged coaxially with each other and having outer diameters different from each other, said inner circular portion having an outer diameter of 285 mm to 310 mm and comprising a first arc tube having a tube diameter of 15 mm to 21 mm and said outer circular portion having an outer diameter of 360 mm to 390 mm and comprising a second arc tube having a tube diameter of 15 to 21 mm;
an apparatus body to which said circular fluorescent lamp unit is assembled;
a light reflection member provided for the apparatus body for reflecting a light from the fluorescent lamp unit, said light reflection member including an outer circumferential reflection portion for reflecting a light from the outer circular portion of the fluorescent lamp unit in an outer circumferential direction and an inner central reflection portion for reflecting a light from the inner circular portion of the fluorescent lamp unit in a central downward direction of the apparatus body; and
a holder member for holding the fluorescent lamp unit and wherein said apparatus body is formed with a holder member fitting means for detachably mounting the holder member, said holder member fitting means being formed to said outer circumferential reflection portion.
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Abstract
A lighting apparatus comprises a circular fluorescent lamp having inner and outer circular portions arranged coaxially and having outer diameters different each other, the inner circular portion having an outer meter of 285 mm to 310 mm and comprising a first arc tube having a tube diameter of 15 mm to 21 mm and the outer circular portion having an outer diameter of 360 to 390 mm comprising a second arc tube having a tube diameter of 15 to 21 mm. The lighting apparatus further comprises an apparatus body to which the circular fluorescent lamp is assembled. The apparatus body is provided with light reflection member adapted to reflect a light from the fluorescent lamp means.
78 Citations
11 Claims
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1. A lighting apparatus comprising:
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a circular fluorescent lamp unit having inner and outer circular portions arranged coaxially with each other and having outer diameters different from each other, said inner circular portion having an outer diameter of 285 mm to 310 mm and comprising a first arc tube having a tube diameter of 15 mm to 21 mm and said outer circular portion having an outer diameter of 360 mm to 390 mm and comprising a second arc tube having a tube diameter of 15 to 21 mm; an apparatus body to which said circular fluorescent lamp unit is assembled; a light reflection member provided for the apparatus body for reflecting a light from the fluorescent lamp unit, said light reflection member including an outer circumferential reflection portion for reflecting a light from the outer circular portion of the fluorescent lamp unit in an outer circumferential direction and an inner central reflection portion for reflecting a light from the inner circular portion of the fluorescent lamp unit in a central downward direction of the apparatus body; and a holder member for holding the fluorescent lamp unit and wherein said apparatus body is formed with a holder member fitting means for detachably mounting the holder member, said holder member fitting means being formed to said outer circumferential reflection portion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification