| 摘要 |
PURPOSE: A bulb shaft connection device is provided to achieve improved reliability of transmission of rotating force and lengthen the useful life of the bulb by minimizing a partial side wear of the bulb shaft. CONSTITUTION: A bulb shaft connection device comprises a motor shaft assembly connected to a bulb motor(10), and which has an outer surface on which a male screw is formed; a bulb shaft(5b) connected to a bulb(5) and accommodated into the motor shaft assembly; a fixing nut(30) coupled to the motor shaft assembly, and which couples the motor shaft assembly and the bulb shaft; and an inner ring(40) interposed between the inner surface of the motor shaft assembly and the outer surface of the bulb shaft. The motor shaft assembly includes a motor shaft(15) connected to the bulb motor; and a connection member(20) coupled to the motor shaft so as to allow for an insertion of the bulb shaft.
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