| 摘要 |
PROBLEM TO BE SOLVED: To simplify operation, ensure locking and releasing operation and achieve miniaturization by providing a locking projection piece and a releasing projection piece so as to protrude in the direction of a locking side part. SOLUTION: A lid body 3 has a second locking side part 15 bent at a right angle on both sides thereof, and the part 15 is provided in the position where it is nearly brought into sliding contact with or made to come near to and face against the first locking side part 7 of a base body 2 on the inside when the body 3 is closed. Also, the locking arm part 15A and the releasing arm part 15B of the part 15 are provided in a nearly triangular form in which the opposed tip parts thereof are bent and at the same time a locking projection piece 16 and a releasing projection piece 17 respectively are protruded in the direction of the side. The releasing projection piece 17 provided in the position having a degree of freedom to be bent relative to the projection piece 16 is released by only lifting up the body 3 into the opened state. Therefore, the opening and closing of the body 3 respectively are performed by one operation, so that operation may be simplified and at the same time the locking into the closed state may be surely performed. |
