Lock for a vehicle door

Details Lock for a vehicle door Lock for a vehicle door

1999-11-23

2002-11-05

Luu, Teri Pham (Department: 3677)

Closure fasteners

Bolts

Swinging

C292S216000, C292SDIG002

Reexamination Certificate

active

06474704

ABSTRACT:

FIELD AND BACKGROUND OF THE INVENTION
The invention relates to a lock for a movable arrangement, such as a door, rear flap or the like of a vehicle, for the drive of a component.
DE 42 28 233 A1 discloses a lock having lock components, such as a rotary latch and detent pawl, in which the detent pawl arrests or releases the rotary latch. The release takes place as a function of instructions issued by an operator, if appropriate via a remote control, by the fact that an actuating drive, which moves the detent pawl, is set in operation, as a result of which the rotary latch is then released, so that the movable arrangement (such as, for example, a door, rear flap or the like opens or can be opened.
This lock actually functions satisfactorily but has the disadvantage that additional devices, by means of which a mechanical connection between a handle and a component of the lock is provided or can be produced in an emergency, are also required for safety reasons. In this connection, said known lock comprises a multiplicity of Bowden cables which transmit an actuation of the handle through the actuating drive or the detent pawl via a lifting mechanism in an emergency. This necessitates a multiplicity of additional components which require a disproportionately high outlay on installation, since the handle is generally arranged at a distance from the lock. The Bowden cables therefore have to be placed in the body of the door, in particular, which not only results in a high outlay on installation but also in high material costs.
SUMMARY OF THE INVENTION
The invention is therefore based on the object of providing a lock which, with the point of view of comfort taken into consideration, satisfies the required safety precaution such a manner that in the event of one actuating drive breaking down, there is always a further way of opening the movable arrangement.
According to the invention, provision is made for the multiplicity of components, which relate to the redundancy (such as Bowden cables, lever mechanism, etc.), from the abovementioned prior art to be replaced by a further actuating drive, which acts directly or indirectly on the component, in particular the detent pawl, of the lock. The direct drive is understood as the fact that whenever the first actuating drive is switched on, at the same time the further actuating drive is also always switched on, so that in the event of one actuating drive breaking down, a further actuating drive is still always available for the opening of the movable arrangement. The direct drive is further understood as the fact that the movement of the actuating drive is transmitted to the component without stepping down or stepping up and without changing the transmission movement. This is the case, for example, in an actuating drive which is designed as a solenoid with an actuating element and in which the linear movement of the actuating element is transmitted directly to the detent pawl.
An indirect drive is understood as the fact that it is normally always the first actuating drive which is actuated to effect an opening procedure, and only in the event of the first actuating drive being defective is the further actuating drive actuable—optionally with a time-delay. The indirect drive is further understood as the fact that the movement of an actuating drive or of both actuating drives is converted (for example from a linear movement into a rotational movement or vice versa) in a stepped-down or stepped-up manner. The freedom of design when configuring the lock as a function of the actuating drive used is thereby increased.


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