Cable-controlled window winder with a guiding track

Details Cable-controlled window winder with a guiding track Cable-controlled window winder with a guiding track

1999-04-15

2000-04-18

Redman, Jerry

Movable or removable closures

With operator for movably mounted closure

Drive within closure housing

E05F 1148

Patent

active

060500298

DESCRIPTION:

BRIEF SUMMARY
FIELD OF THE INVENTION

The invention relates to a cable window lifter with a guide rail.


BACKGROUND OF THE INVENTION

With window lifters of this kind, the window pane is fixed on one or two followers which are each guided on a guide rail and which can be displaced along the guide rail by means of a cable loop in active connection with a drive for raising and lowering the window.
From DE 31 44 496 C2, a window lifter of the generic kind is known which has a hand or motor driven displacement drive and which prevents automatic movement of the window pane when the displacement drive is stationary. This is achieved in that a brake device is attached to the follower, which when the displacement drive is stationary, presses a brake block against a side face of the guide rail. When the displacement drive is running, the guide rail is again released in that a resetting member mounted movable on the follower moves the brake block into a release position.


SUMMARY OF THE INVENTION

The object of the invention is to further develop a window lifter of the kind already mentioned so that a window can be held as securely as possible in the closed position or another defined position with the minimum structural expense.
This is achieved according to the invention through a cable window lifter for motor vehicles having a guide rail; a follower having a swivel mounted blocking element with a swivel axis; a cable loop which is guided along the guide rail; and a friction element of the follower that causes the swivel movement. The follower is mounted displaceable on the guide rail and is in connection with a window pane. The swivel axis of the blocking element runs across the extension direction of the guide rail. The cable loop is in active connection through guide pulley elements with a drive unit and transfers the drive force to the follower. The friction element is in active connection with the guide rail and is mounted outside of a draw axis of the cable loop.
The blocking element of the follower has a support area, preferably a support edge. This support area is movable from a first position spaced along the draw axis of the cable loop from a support element provided on the guide rail to a swiveled position that is in positive locking engagement with the support element provided on the guide rail through swivel action of the follower which is connected, for articulated movement, with the window pane. The support area of the follower is spaced from the support element along the draw axis of the cable loop. The support element is mounted underneath the friction element.
By friction element is meant a structural element which, during displacement of the follower along the guide rail, experiences a friction force.
With the design of a cable window lifter, according to the invention, the uncontrolled opening of a closed window through external forces which can occur, for example, when travelling over uneven roads or in the event of an unauthorized attempt to break into the vehicle, is prevented.
When an external force is exerted on the window pane which attempts to lower the window pane, a corresponding force also acts on the follower connected to the window pane. Because the swivel mounted follower is in friction connection with the guide rail or another locally fixed component part of the window lifter through a friction element, it does not simply follow the external force but it additionally executes a swivel movement about the axis which is defined by the friction element.
Because the friction element is preferably fixedly connected to the follower, it is not a question of a locally fixed swivel axis. Rather the friction element and, thus also, the swivel axis follow the movement of the follower (time-dependent momentary swivel axis).
As a result of its swivel movement, the follower, during lowering of the window pane, comes to a stop with the support element which is mounted at a suitable point in the area of the guide rail. A further lowering of the window pane is then avoided through the alternating (positive) en

REFERENCES:
patent: 4759653 (1988-07-01), Maekawa et al.
patent: 5528861 (1996-06-01), Beyerlein
patent: 5673515 (1997-10-01), Weber et al.
patent: 5970658 (1999-10-01), Smpth

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