LOCKING MECHANISM FOR A BATTERY PACK, QUICK-SWAP SUPPORT FRAME ASSEMBLY AND ELECTRIC VEHICLE

A locking mechanism (100) for use in a battery pack, comprising: a lock base (110), the lock base (110) being provided with an opening and a cavity (112) extending from the opening (111), the opening (111) being used for allowing a lock shaft (200) mounted on the battery pack to enter the cavity (112); a lock tongue (120), the lock tongue (120) being rotatable relative to the lock base (110) so as to shift between an unlocked state and a locked state, and when the lock tongue (120) is in the locked state, the lock tongue (120) can stop the lock shaft (200) from leaving the cavity (112) via the opening (111); and a resetting part (130), the resetting part (130) being provided on the lock base (110) and acting on the lock tongue (120), the resetting part (130) being capable of producing a flexible distension and used for allowing the lock tongue (120) to rotate in a locking direction so as to reset from the unlocked state to the locked state, thus facilitating the mounting and locking of the battery pack, improving the reliability of locking, and increasing safety. Also disclosed are a lock assembly comprising the locking mechanism, a quick-swap support frame assembly, and an electric vehicle.