Patent ID: 7816888

Claim:
A system comprising a battery pack, a cordless power tool, and a device for locking said battery pack to said cordless power tool, the system comprising: a guide comprising a linear guide strip disposed on the cordless power tool and a linear guide slot disposed on the battery pack, the guide strip being slidably received within the guide slot and configured to guide the battery pack in a predetermined longitudinal movement direction as the battery pack moves between a locking position in which the guide strip is locked within the guide slot to lock the battery pack to the cordless power tool and a removal position in which the guide strip is removed from the guide slot to remove the battery pack from the cordless power tool; and at least one detent recess disposed on the battery pack and at least one mating latch disposed on the power tool, wherein in the locking position, the latch is brought into engagement with the detent recess to lock the battery pack to the cordless power tool, and wherein the latch in released from the detent recess to allow the battery pack to be moved to the removal position; said guide further comprising a break formed by at least one transverse projection or recess on or in the guide strip, respectively, in at least one location along the longitudinal length of the guide strip, such that when the battery pack moves from the locking position towards the removal position, at said location a force acting on the battery pack moves the guide strip within the guide slot transversely to said longitudinal direction into a safety position, in which said projection or recess in said guide strip engages a mating transverse recess or projection in the guide slot such that the guide strip is prevented from moving further along said guide slot into the removal position.