| 摘要 |
<p>PURPOSE:To improve the operability of opening and closing by constituting a frame- body locking mechanism so as to maximize operating physical force including the time of an overstroke immediately before a second frame body is closed and locked to a first frame body. CONSTITUTION:When extruding force by an extruding member 7a is represented by W1L, extruding force by the extruding member 7a at a time when an engaging member 5 is displaced up to the end section of an overstroke by W1max, and maximum force at a position immediately before the engaging member 5 is locked by a locking member 6c by W2max, the relationship of W1max-W1L<W2max holds in the extruding force of the engaging member 5 by the locking member 6c and the extruding member 7a. When a second frame body 3 is pushed down in order to be closed and locked to a first frame body 1, the engaging member 5 pushes out the locking member 6c in the right direction along the inclined section of the locking member 6c, and pushes down the extruding member 7a to a lower section. When the second frame body 3 is pushed down, a fixed quantity of the overstroke of the engaging member 5 is conducted to the lower section of the locking member 6c while the locking member 6c is returned to an original position by the energizing of a pushing spring 6e.</p> |
