| 摘要 |
PROBLEM TO BE SOLVED: To provide a lock mechanism in which operation performance on lock and lock release is excellent, and the lock is hardly released inadvertently when the mechanism is once locked. SOLUTION: A lock structure is equipped with two plate-like lock pieces 61, 71 which are adjoining arranged on an approximately same plane at a lock time, engaging slots 62, 72 which have openings in adjoining end faces 61a, 71a respectively facing the same direction of respective lock pieces 61, 71 and pass through in the plate thickness direction, and a square loop-like lock ring 80 which joins both lock pieces 61, 71 together by respectively inserting facing linear portions 81, 82 into the respective engaging slots 62, 72. The shapes of the engaging slots 62, 72 viewed in the plate thickness direction of the respective lock pieces 61, 71 are formed into L-shapes composed of introduction slot portions 62a, 72a and slide slot portions 62b, 72b, and on the introduction slot portions 62a, 72a and the slide slot portions 62b, 72b of the other lock piece, first hold portion 63 and second hold portion 64 which can hold the linear portions 81, 82 of the lock ring 80 are provided. |
