Manually resettable missile fin lock assembly

A fin lock assembly for locking fins of a missile when not in use, comprising:

• a movable fin;
• a housing;
• a lock shaft disposed partially within and extending from the housing, the lock shaft including lock shaft gear teeth and movable between a lock position, in which rotation of the movable fin is prevented, and an unlock position, in which rotation of the movable fin is allowed;
• a reset shaft disposed at least partially within the housing and spaced apart from the lock shaft, the reset shaft including reset shaft gear teeth and movable between a first position and a second position;
• a transfer gear disposed between the lock shaft and the reset shaft, the transfer gear meshing with the lock shaft gear teeth and the reset shaft gear teeth and configured to transfer motion between the lock shaft and the reset shaft;
• and
• a spring disposed within the housing and engaging the lock shaft, the spring supplying a spring force to the lock shaft that urges the lock shaft toward the unlock position,
• wherein:
• when the lock shaft moves from the lock position to the unlock position, the reset shaft is moved from the first position to the second position, and
• when the reset shaft moves from the second position to the first position, the lock shaft is moved from the unlock position to the lock position.

A missile, comprising:

• a fuselage;
• a plurality of movable fins disposed on, and rotatable relative to, the fuselage;
• a plurality of lock assemblies disposed on the fuselage, each of the lock assemblies associated with a different one of the moveable fins, each lock assembly comprising:
• a housing;
• a lock shaft disposed partially within and extending from the housing, the lock shaft movable between a lock position, in which rotation of the associated movable fin is prevented, and an unlock position, in which rotation of the associated movable fin is allowed;
• a reset shaft disposed at least partially within the housing and spaced apart from the lock shaft, the reset shaft movable between a first position and a second position;
• and
• a transfer gear disposed between, and engaging, the lock shaft and the reset shaft, the transfer gear configured to transfer motion between the lock shaft and the reset shaft,
• wherein:
• when the lock shaft moves from the lock position to the unlock position, the reset shaft is moved from the first position to the second position, and
• when the reset shaft moves from the second position to the first position, the lock shaft is moved from the unlock position to the lock position.