| 摘要 |
PURPOSE: To complete the hooking function of a latch only when both tongue- like pieces are inserted inside by providing a pair of plastic false hooking preventing members in the cavity of a latch main body. CONSTITUTION: When a tongue-like piece bar 103 is inserted into a cavity 15 while a tongue-like piece bar 104 is outside a latch, the round end 140 of the tongue-like piece bar 103 is engaged with a leg part 153 having an inclined angle in the lower side of hooking and, lastly, a hole 105 is positioned directly above a projection 151. Simultaneously, the tongue-like piece bar 103 is engaged with a recessed surface 144, a false hooking preventing member 136 is moved backward and thereby projections 148 and 149 are moved to be separated from hooks 17. However, the projections 148 and 149 of a member 137 are left in the upper sides of the hooks 17, hooks are prevented from being moved upward by the forces of helical springs 20 and 21 and thus an upright hooking part 151 is prevented from entering an opening part 105. The upper end 199 of the recessed surface 146 is disposed in the upper side of the top surface of the tongue-like piece bar 103. |
