| 摘要 |
PROBLEM TO BE SOLVED: To easily and positively perform fixing of a horizontal jumping-up seat at its jumping-up position and at the same time positively perform drawing out of a leg body from the jumping-up position when used.SOLUTION: A lock mechanism 20 of a horizontal jumping-up seat 1 comprises a lock pin 22 that is moved between a jumping-up position of a horizontal jumping-up seat 1 where it can be engaged with an engaging means 12 and a locked-state releasing position where it is released from the engaging means 12, a coil spring 26 for biasing the lock pin 22 toward a locking position, and a connector means (comprising a wire 36, a hook plate 28 and a coil spring 34) arranged between a leg body 8 and the lock pin 22, allowing the lock pin 22 at a storage position of the leg body 8 to a seat body 2 to move toward the locking position, and allowing the lock pin 22 at the drawing-out position of the leg body 8 from the seat body 2 to move toward the locked-state releasing position. |
