| 摘要 |
PURPOSE: A fluorescent bar lamp is provided to stably maintain air tightness inside a lamp tube by freely changing an external diameter of each air tightening ring according to tightness of a compression adjustment screw nut for the air tightening ring. CONSTITUTION: A socket member(120) and a finishing member are installed to both ends of a lamp tube(110). Air tightening rings(124,134) closely attach an inner surface of the lamp tube by compression and expansion. The socket member is connected to a power line. A maintenance rounded rim(122) is formed at the leading end of the socket member. An air tightening ring expansion control screwnut(126) is combined with a screw thread(123) formed on the outer circumference of a body(121). The air tightening ring is compressed and expanded by controlling the air tightening ring expansion control screwnut at the outside of the body. A pressing ring(125) is connected to an air tightening ring compression adjustment screwnut at the outside of the body. The air tightening ring expansion control screwnut is coupled with the screw thread of the body. |
