Bidirectional transmission lock box adaptive to extremely-narrow frame profile

The invention discloses a bidirectional transmission lock box adaptive to an extremely narrow frame profile, which comprises a sliding seat, a box body arranged in the middle of the sliding seat, a transmission assembly arranged in the box body in a sliding manner, a first transmission rod and a second transmission rod which are arranged in the box body in a sliding manner, and a locking assembly arranged on the first transmission rod and the second transmission rod, the first transmission rod and the second transmission rod synchronously and reversely slide along the sliding seat through a transmission assembly, and the transmission assembly comprises a lock shaft arranged on the box body in a penetrating mode, a driving gear arranged on the lock shaft, a first rack arranged at one end of the first transmission rod and a second rack arranged at one end of the second transmission rod. The first rack and the second rack are engaged with the upper side and the lower side of the driving gear correspondingly, and