| 摘要 |
PROBLEM TO BE SOLVED: To prevent the thumb turn of a locking/unlocking device from illegally being operated by the hand inserted from outside by breaking a locked mailbox. SOLUTION: A housing 20 provided in an entrance door is fixed to the locking/unlocking device 10 and the housing 20 is provided with a vertically sliding door body 40. The door body 40 is provided with claws 45L in button holes 41a, 41c and claws 45R in button holes 41b, 41d, and urged in the horizontal direction reverse to the front face vertical center line of the door body 40, in a view from respective positions. When the door body 40 is set to the housing 20, the claws 45R, 45L receive the urging force of a spring 44, protrusions 26a, 26b, 26c and 26d form obstacles to give restriction to the sliding movement to the housing 20 of the door body 40. COPYRIGHT: (C)2004,JPO&NCIPI
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