Blocking device for a motor vehicle door

Details Blocking device for a motor vehicle door Blocking device for a motor vehicle door

1995-01-11

1997-10-14

Gall, Lloyd A.

Locks

Special application

For closures

70149, 70218, 70264, 292201, 2923363, 292DIG27, E05B 1310

Patent

active

056760035

DESCRIPTION:

BRIEF SUMMARY
BACKGROUND OF THE INVENTION

The present invention is related to a blocking device. A door lock for a motor vehicle door is known from DE, 31 50 620 A1. In this door lock, which is driven by an electric motor, a rotatable latch is brought into its locked position via a crank mechanism and a knee lever arrangement. This construction requires high motor output and a large number of separate component parts. Moreover, a door which is locked by this device via a motor cannot be opened again in the event of failure of the motor.


SUMMARY OF THE INVENTION

Accordingly, it is an object of the present invention to provide a blocking device for a motor vehicle door, which avoids the disadvantages of the prior art.
In keeping with these objects and with others which will become apparent hereinafter, one feature of the present invention resides, briefly stated in a central locking system for motor vehicles which has all of the opening and closing functions occurring in normal operations also in the event of failure of individual components, when necessary a vehicle provided with the system can be opened and locked when the door lock motors are out of operation, and when the vehicle is locked the outer door handles can be pulled without meeting resistance, for which purpose a control cam lifts an actuating arm so that a door handle lever can be actuated without the actuating arm being grasped.
Compared with the prior art, the blocking device according to the invention has the advantage of a large number of functions, a simple construction and lightly loaded structural component parts. The individual locks of the blocking device are accordingly lighter and smaller and the power to be applied by the motor is reduced to a minimum. In addition, the blocking device is so designed that the vehicle can also be opened and locked mechanically in a conventional manner in the absence of the central locking function in the event of failure of an electrical component.
The construction according to the invention has the additional advantage that the door handles serving to open the doors can be pulled without encountering a load when the vehicle is locked and no forces are exerted on the inner structural component parts of the lock. In this way, the risk of breakage of the structural members in question, which would otherwise be present, is avoided.
Another modification of the inventive blocking device has the additional advantage that the motor need only apply the force required for actuating one of the two unblocking levers at one time. Accordingly, the motor power is reduced by half compared with a simultaneous actuation of both levers.
In a particularly advantageous manner, movable drivers which are preferably arranged at bendable actuating arms are attached to the unblocking levers. These actuating arms can be moved by control segments of the control member into two different positions in which they can either be grasped by door handle levers connected with the door handles or can pass the drivers without effect. The actuating arms have the advantage that they are very light so that only low motor power is required.
The advantage in arranging unblocking levers and door handle levers on a common axle consists in that no additional friction occurs between the unblocking levers and door handle levers when opening the door. This ensures reliable operation of the lock and minimizes the needed force applied by the driver at the door handle.
Thanks to the emergency locking and unlocking levers, the door in question can be opened and closed also if a motor fails or is defective.
The novel features which are considered as characteristic for the present invention are set forth in particular in the appended claims. The invention itself, however, both as to its construction and its method of operation, together with additional objects and advantages thereof, will be best understood from the following description of specific embodiments when read in connection with the accompanying drawings.
FIG. 1 shows an internal view of a lock in whic

REFERENCES:
patent: 4904006 (1990-02-01), Hayakawa et al.
patent: 5066054 (1991-11-01), Ingenhoven

Affiliated with

Also associated with

Rating

Blocking device for a motor vehicle door does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Blocking device for a motor vehicle door, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Blocking device for a motor vehicle door will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1547431