DE9110643U1 - Safety lock for vehicle door locks - Google Patents

Description

FRANZ SCHMIDT, Dipl.-lng. &Ggr;*% "· .'Fn&senlusstraBeii

■ &igr;.,: PO Box 45

'" 6384Schmitten 1 Tel.:06084-2515 3135

Safety lock for vehicle door locks

Safety locks for vehicle door locks, especially for automatic and quiet door locks, have the task of keeping the vehicle doors securely closed in the event of major deformations on the doors or the body. However, in the event of small changes in the distance between the door lock and the bracket, changes - caused by twisting of the body, changes due to temperature differences or minor collisions, etc. - the safety lock is not effective and does not affect normal door operation.

Devices for appropriate security are used on or in conventional vehicle door locks. The problem and the practical solutions for conventional locks are known.

These known security options are not applicable for quiet and automatic door locks.

For example, a safety lock is described below in connection with the patent DE 3 6 3 9 530 C 2 (low-noise lock, especially for motor vehicle doors).

Fig. 1 Longitudinal section through the door lock with bracket on the door frame

Fig. 2 horizontal section through the door lock with bracket

Fig. 3 Section A-B of the bracket

All images assume a closed front door (left), view from inside the vehicle.

In the longitudinal section (Fig. 1), the safety part 1 (21), firmly connected to the cam disc (1), is shown in the locked position. By turning the cam disc (1) to the left with the safety part (21), the cam disc (1) is brought into the open position of the door lock. At the same time, the safety part (21) runs through a certain angle of rotation. The end position (open) of the safety part (21) is shown in dashed lines in Fig. 1.

If the locking process is initiated by turning the cam disc (1) to the right when the door lock is open, the curved part of the cam disc (1) first closes the door, and only when the cam disc (1) begins to lock can the safety part (21) leave the lock housing (6). This sequence of movements means that the safety part (21) comes into premature contact with the holder (2) and still allows the safety part (21) to enter the holder (2 and 2a) unhindered.

In the locking position (Fig. 1, 2 and 3), the locking part (2) and the safety part (21) are arranged in such a way that small changes in the distance between the door lock and the holder are possible without affecting the function. If, for example, the locking part is moved further to the left, this movement is absorbed by the head part (21a) of the safety part (21) and the locking segment (2a) (see Fig. 2 and 3). A compression between the holder and the lock can be absorbed by a fixed distance between the cam disc (1) and the adapted curves (R) in the holder (2). Large forces in the direction mentioned cause the holder and the lock to be pressed together.

The length of the head part (21a) on the securing part (21) and the height of the locking segment (2a) are dimensioned so that even in the event of major deformations on the sides of a vehicle, the head part (21a) cannot be forced out of the holder. The necessary clearance (Fig. 2) between the securing part (21) and the locking segment (2a) is made possible by the cam disk (1) being positioned in the front part of the holder (2).

The safety part (21) - preferably made of high-quality steel - must be firmly connected to the curved part (1). For example, the safety part (21) can be embedded in the curved part (1) made of a suitable plastic. Fig. 2 shows a possible design and connection of these two parts. The holding part (21b) absorbs any forces that may occur. In addition, the axle bolt (7), the bearing and spacer sleeve (7a) and the mounting plate (7b) can hold the safety part.

The cam disc and safety part can also consist of one piece, whereby the protruding remainder of the safety part and the head part must have sufficient bending and tensile strength.

Claims (3)

FRANZ SCHMIDT, Dipl.-Ing. Freceniusstrasse 11 PO Box 45 638-3 Schmitten 1 Tel.:06084-2515 3135 Protection claims 1. Safety lock for vehicle door locks, characterized in that a safety lock (21), firmly connected to the cam disc (1), is intended to prevent unintentional door opening due to major deformations on the doors or the body, in that the safety lock (21) with its head part (21a) - the radius of the head part (21a) corresponds to the diameter of the cam disc (1) - can be moved unhindered into the holder (2) with the locking segment (2a) during the locking movement of the cam disc (1) until the door is completely closed and in this normal position has no contact with the locking segment (2a). 2. Safety lock for vehicle door locks, according to claim 1, characterized in that there is a clearance and movement space between the safety lock (21) and the locking segment (2a), this clearance is secured by the cam disc (1) in the front part of the holder (2), the head part (2a) cannot be forced out of the holder, even by strong deformations on the doors and the body, but if the lock and the holder are pushed together, the two curves (R) in the holder (2) can stop this movement via the cam disc. 3. Safety lock for vehicle door locks, according to claims 1 and 3, characterized in that the cam disc (1) and the securing part (21) can be made from one piece.