| 摘要 |
PURPOSE: An opening and closing device of a breech mechanism and a cannon with the same are provided to maintain closed state of a breech mechanism after launching because a stopping projection of a second plunger is inserted into a stopping groove of a pressing unit in order that the second plunger is fixed the pressing unit. CONSTITUTION: An opening and closing device of a breech mechanism comprises a cam follower, a housing(120), first and second plungers(130,180), a rotating unit, a pressing unit(160), an open cam and a first elastic member(140). The cam follower rotates to open and close a breech mechanism. The first plunger is installed inside the housing and movably arranged in unidirection. The pressing unit is coupled to the rotating unit and inserted into the housing. The pressing unit is pressed the first plunger when the rotating unit rotates. The open cam moves between the first and second state by rotation of the rotating unit. In the first state, the open cam guides rotation of the cam follower and the open cam escapes from a moving path of the cam follower in the second state. The first elastic member supports the first plunger to apply returning force to the rotating unit. The second plunger supports the pressing unit in the second state by movement. |
