To prevent a movable contact point from deforming by external force without fear of electric shock by touching fingertips to a fixing contact point at changing of lamp, and with a stability of contact of the movable contact point and the fixing contact point.
The lighting fixture is such that a straight tube fluorescent lamp is kept in a cylinder, a socket 7 electrically connecting the lamp to a socket holder arranged at both ends of the cylinder is slid and stored inside a socket holder 6, and the lamp can be changed from one openable and closable end of the socket holder. Electric connection of the socket 7 and the socket holder is made from a sliding contact of a fixing contact point provided on an inner surface of the socket holder with a movable contact point 9 with elasticity provided on a socket side, and also, the fixing contact point is on a bottom surface of a recess made of an insulation material, and the movable contact point 9 has a protrusion 17 contacting to the fixing contact point. Since the fixing contact point is protected by the insulation material of the recess, an unprepared contact (shock) to the fixing contact point can be prevented. Also, a contact part of the contact point is protected by the insulation material of the recess of the fixing contact point side.
COPYRIGHT: (C)2006,JPO&NCIPI
Takunobu Sagawa
Matsushita Electric Works Interior Lighting Co., Ltd.
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Makoto Ito