| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem that, when an external force is received in a conventional pin terminal connection structure, the risk of fall of a connection body increases.SOLUTION: A safe lock structure is obtained in which a cartridge type case adding other functions to straight-tube LED lamps each having a pin terminal, can be handled just like one straight-tube LED lamp by connections in the pin terminals. The cartridge type case 3 includes a deep cylindrical cover 9 which is longer than the pin terminal 5. A lock structure 12 is provided for locking by means of protrusions which are provided either in end parts 2 including the pin terminals of the straight-tube LED lamps 1 or in the deep cylindrical cover, or for mutually threading with the end parts including the pin terminals by means of ring screws 11 held in the deep cylindrical cover. |
