Device for locking a power tool to a battery pack, and battery pack

1. A device for locking a power tool to a battery pack, comprising at least one movable locking bar mountable on the power tool and upon locking engaging a detent recess of the battery pack; and at least one unlocking device for manually disengaging said locking bar from said detent recess, said unlocking device being mountable on said battery pack and acting on said locking bar of said power tool.

2. A device as defined in claim 1 , wherein said unlocking device has a contact-pressure face which upon disengagement of said locking bar is pressed against said locking bar and with said locking bar disengaged is located between two diametrically opposed guide faces of the battery pack.

3. A device as defined in claim 1 , wherein said unlocking device has a contact-pressure face which upon disengagement of said locking bar is pressed against said locking bar and with said rocking bar disengaged is aligned with one of two diametrically opposed guide faces of the battery pack.

4. A device as defined in claim 1 , wherein said unlocking device has an unlocking button which is movable in the detent recess.

5. A device in claim 1 , wherein said unlocking device has an unlocking button which is diametrically opposite a part of said locking bar that engages said detent recess.

6. A device as defined in claim 1 ; and further comprising an elastically deformable element which upon a manual actuation of said unlocking device for disengaging said locking bar is elastically deformed and which has a restoring force moving said unlocking device back into an outset position.

7. A device as defined in claim 6 , wherein said elastically deformable element has an elastomer material and connects said unlocking device to a housing of the battery pack.

8. A device as defined in claim 6 , wherein elastically deformable element has an elastically deformable plastic material and is integrated with a housing of the battery pack and acts on said unlocking device.

9. A device as defined in claim 5 , wherein said elastically deformable element has an elastically deformable plastic material and is integrated with said unlocking device and acts on a housing of the battery pack.

10. A battery pack for locking to a power tool, comprising at least one detent recess which is engaged upon locking by a movable locking bar of the power tool; and an unlocking device mounted on the battery pack for manually disengaging said looking bar from said detent recess, said unlocking device being mounted on the battery pack and acting on said locking bar of said power tool.

11. A power tool system, comprising a power tool having a movable locking bar, a battery pack provided for said power tool and having at least one detent recess configured so that upon locking said at least one detent recess is engaged by said movable locking bar of said power tool; and at least one unlocking device mounted on said battery pack for manually disengaging said locking bar from said detent recess, said at least one unlocking device being mounted on said battery pack and acting on said locking bar of said power tool.