EP1146186A2 - Motor vehicle lock with power assisted opening - Google Patents

Abstract

Lock has elements such as a lock catch (3) and locking pawl (4), a lock mechanism (5), a motorized theft protection drive (9) acting on a coupling lever (8), a motorized opening drive (12) acting on the locking pawl and a motorized central locking drive (13) for coupling/decoupling the outer door handle. The opening drive acts on the lever in an actuation direction and moves it into the coupled position when opening and raising the pawl.

Description

The invention relates to a motor vehicle lock, in particular a side door lock, but also a rear door lock or the like, with the features of the generic term of claim 1.

In the known motor vehicle lock from which the invention is based (DE 195 30 726 A1) are an electromotive theft protection actuator and an electromotive opening drive is provided. Next to the from the inside door handle operable inner lever can also be a an outer operating lever that can be actuated can be provided. However, this can also be dispensed with because of the electromotive Opening drive an opening takes place by motor. Only the Pawl-lifting inner operating lever is necessary to function to be able to open the motor vehicle door from the inside, even if the electromotive Opening drive should have failed.

In the known motor vehicle door lock, which was mentioned earlier is, the opening drive has a worm gear with worm and Worm wheel and eccentric release pin arranged on the worm wheel as an actuator. This control element acts on a release pin the pawl and lifts it out of the latch for the purpose of opening the door or main latch of the lock trap. Quite independently of the electromotive Opening drive is an electromotive theft protection actuator intended. This acts on a clutch lever. The clutch lever can take a first position, in which an inside door handle over a Internal operating lever is coupled to the pawl in terms of drive technology and pulling on the inside door handle thus lifts the pawl. In a second The functional position of the clutch lever is the inside operating lever disengaged from the pawl, so that pulling on the inner operating lever only leads to an idle stroke. This functional position is for the one hand purpose theft protection, on the other hand a child lock function ingested.

In the known motor vehicle lock explained above, there is a separate one electromotive central locking actuator not provided. The "Unlock" and "secure" functions of the central locking actuator are by means of a bistable electronically controllable by a control device Switch realizes the influence of the outside door handle on the electromotive opening drive allowed or prevented. Basically it is also possible here, an electromotive central locking actuator to provide independently, as is the case from the other Technology is known per se (EP 0 738 363 B1). And of course it is known prior art, the anti-theft actuator in to integrate the central locking actuator, i.e. in the central locking actuator an additional function "theft-proof" to be set up (GB 2 222 203 A).

In practice it has been shown that in the functional position "theft-proof" in the known motor vehicle lock explained above, the following unpleasant situation can occur. The motor vehicle lock is from Activated on the outside, the electromotive opening drive starts and lifts the Pawl off. Since the start of the electromotive opening drive should be done as quickly as possible so that you as a user can delay the time if possible not noticing, the lock mechanism can this Follow the pawl lifting process with a time delay. Even the electromotive The anti-theft actuator can only delay the function consequences. If the anti-theft actuator falls into this, however If the moment stops or does not start, the lock mechanism remains in the Functional position "theft-proof". The unsuspecting user gets in the vehicle slams in, slams the door shut, and then realizes that he's going through the door Pulling on the inside door handle can no longer open.

To avoid the problematic situation explained above, is in the booth the technology through the control electronics of the locking system as a whole ensured that the position of the anti-theft actuator and / or Clutch lever is queried by microswitches or sensors and a Deployment of the pawl is prevented as long as the control electronics does not signal that the "unlocked" function position has been reached Has. DE 299 21 946 U1 deals with a similar problem, but from a slightly different perspective.

The teaching is based on the problem, the previously explained safety function to achieve in a simpler and safer way.

The above task is with a motor vehicle lock Features of the preamble of claim 1 by the features of the characterizing Part of claim 1 solved. Advantageous configurations and Further training is the subject of the subclaims.

According to the invention, the electronic locking of the electromotive Anti-theft actuator or the clutch lever with dispense with the electromotive opening drive and corresponding microswitches or save sensors by using the clutch lever itself mechanically is ejected as soon as the pawl is opened by the opening mechanism is excavated. This ensures in a mechanical manner that that the problematic containment situation for the user cannot occur.

Fig. 1

ein bevorzugtes Ausführungsbeispiel eines erfindungsgemäßen Kraftfahrzeugschlosses in Form eines Seitentürschlosses in Funktionsstellung "diebstahlgesichert" und

Fig. 2

ausschnittweise das Kraftfahrzeugschloß aus Fig. 1 in Funktionsstellung "geöffnet, entsichert".

In the following, the invention will be explained in more detail with reference to a drawing showing only one exemplary embodiment. In the drawing shows

Fig. 1

a preferred embodiment of a motor vehicle lock according to the invention in the form of a side door lock in the functional position "theft-proof" and

Fig. 2

Detail of the motor vehicle lock from FIG. 1 in the functional position "opened, unlocked".

The motor vehicle lock shown in Fig. 1 is designed as a side door lock drawn. The invention is also in a rear door lock or a flap lock can be used in the same way in principle.

This motor vehicle lock initially shows an angular one Base plate 1 with an inlet slot 2 for a striker or the like. That regularly intended so-called "catch camp", mostly as a plastic part is omitted here for the sake of clarity.

On the base plate 1 you can first see locking elements, namely here a lock latch 3 and a lock latch 3 holding in the closed position Pawl 4. A lock mechanism is also provided. This has one can be operated by an inner door handle, the pawl 4 lifting inner operating lever 5 on. The inner operating lever 5 is in FIG. 1 on the back of the base plate 1. The soul of a Bowden cable engages it whose jacket is hung on a support of the base plate 1.

The inner operating lever 5 acts via a pawl actuator 6 and a pawl lever 7 on the pawl 4, the pawl lever 7 with the pawl 4 in one direction, in the other Direction is only non-positively coupled via a spring, so that the pawl 4 can remain raised, even if the pawl lever 7 in returns to its original position.

Between the inner operating lever 5 and the pawl 4, shown in Embodiment between the inner operating lever 5 and the Pawl actuator 6 is a coupling or uncoupling this Clutch lever 8 provided. This clutch lever 8 is in the in the functional position shown in Fig. 1 "uncoupled" what the functional position "theft-proof" of the motor vehicle lock as a whole corresponds. In this case, the inner operating lever 5 is in the idle stroke actuatable.

In principle, it is also possible in the "anti-theft" function position to block the inner operating lever 5 and the inner door handle then keep empty actuated against spring force of a return spring.

A motorized, in the illustrated embodiment, acts on the clutch lever 8 electromotive anti-theft device 9. This is in the illustrated and preferred embodiment as a worm gear drive with worm 10 and worm wheel 11. Other embodiments are known from the prior art. Using the anti-theft actuator 9, the clutch lever 8 from the clutch in the uncoupling position to achieve the "anti-theft" position be relocated.

There is also provided a motorized embodiment, which is shown and preferred in the exemplary embodiment electromotive opening drive 12. This can from Actuate internal operating lever 5 independently directly on the pawl 4 and dig it out.

The illustrated embodiment finally shows a special one Embodiment provided as a third electromotive drive here is, namely a central locking actuator 13. This is used for Coupling or uncoupling of an outside door handle not shown in FIG. 1 or an external operating lever connected to such an external door handle. The illustrated embodiment shows the central locking actuator 13 equipped with a worm gear Worm 14 and worm wheel 15 and two offset by 180 ° to each other arranged driver pin 16 on the worm wheel 15.

A pivot lever can be operated by means of the central locking actuator 13 17 of the lock mechanism 5 from the functional position shown in Fig. 1 "secured" in a functional position "unlocked" and vice versa. In the rest position shown in Fig. 1, the pivot lever 17th also mechanically knock over from a lock nut 18, which in turn from the outside of the door, for example, from a key-operated locking cylinder can be actuated from.

The above construction is only shown and preferred Embodiment realized so. Are from the prior art Many other design variants are known to have the corresponding functions can realize the motor vehicle lock.

With regard to the actuators, it should be noted that not only electromotive Actuators come into question, but especially pneumatic Actuators, possibly also hydraulic actuators, but also electromagnetic ones Actuators.

The problem of the anti-theft actuator "running" after the opening drive 12 9 in the event of the theft protection actuator failing 9 has been explained in the general part of the description. This problem becomes mechanical in the motor vehicle lock shown Way, without additional microswitches and without additional control technology Measures in the control electronics solved in that the Opening drive 12 also in an actuation direction on the clutch lever 8 acts, namely when opening and lifting the Pawl 4 shifted the clutch lever 8 into the coupling position.

Fig. 1 shows the functional position "theft-proof", Fig. 2 then shows the Function position "not protected against theft". The opening drive 12 has started and has the clutch lever 8 clockwise, that is in Fig. 1st to the right, thus pivoted up so that the clutch lever 8 already the coupling position for coupling the inner operating lever 5 has reached the pawl 4 or the pawl lever 7. On mechanical This ensures that the functional position is "theft-proof" has definitely been left when the opening drive 12 the pawl has been lifted and the motor vehicle door has been opened is.

The teaching of the invention can be mechanical in any constructive way Kind of realize. It only has to be that explained in claim 1 Function can be achieved. The illustrated and preferred embodiment shows so far a solution in which the opening drive 12 to one Inner opening lever 19 acts on the one hand with the pawl 4, in the illustrated Embodiment via the pawl lever 7 and a transmission lever 20, is coupled, on the other hand in an operating direction on Clutch lever 8 comes to rest. The latter succeeds here in that the Inner opening lever 19 has a correspondingly contoured actuating lug 21 has, which at an end of the clutch lever 8 this comes to the system moving.

The illustrated and preferred embodiment also shows the opening drive 12 as worm gear drive with worm 22, worm gear 23 and eccentric pin as an actuator 24 on the worm wheel 23. A Rotation of the worm wheel 23 from FIG. 1 clockwise into the position of Fig. 2 leads to the desired opening function and displacement of the clutch lever 8 in the functional position "not protected against theft".

It is noticeable that in the illustrated embodiment also in Fig. 2, the central locking actuator 13 or its pivot lever 17 further in Functional position "secured" stands. This is not critical because it is only the opening affects the motor vehicle door from the outside. With appropriate control the central locking can of course be changed again.

However, the exemplary embodiment shown and preferred in this respect shows a special coupling of the central locking actuator 13 with the clutch lever 8 as provided that the central locking actuator 13 also in an actuation direction on the clutch lever 8 acts, namely when unlocking the clutch lever 8 in the coupling position is shifted. This is shown in the preferred and preferred Embodiment a control lever 25 which at the lower end of the Swivel lever 17 is articulated and blunt on an actuating arm 26 on Clutch lever 8 pushes.

The function explained above provides additional security in such a way that in the functional position "unlocked" despite different engines it is ensured that the functional position "theft-proof" is not inserted is.

The illustrated embodiment shows the motor, in particular electromotive central locking actuator 13 separately from the motorized, in particular electromotive theft protection actuator 9. The prior art explained in the general part of the description shows also integrated actuators that combine both functions in one actuator.

The illustrated embodiment shows only as shown Theft-proof function, not the child-proof function. This can in the illustrated embodiment of a motor vehicle lock may also be mechanically set up by an additional mechanical Decoupling possibility for the inner operating lever 5 independently from the functional position "unlocked" and "secured".

Claims (5)

Motor vehicle lock, especially a side door lock, with locking elements such as a lock latch (3) and a pawl (4) holding the lock latch (3) in the closed position, with a lock mechanism (5) which has at least one inner actuating lever (5) which can be actuated by an inner door handle and which lifts the pawl (4) and a clutch lever (8) which couples the inner actuating lever (5) to the pawl (4) or uncouples it, with a motorized, in particular electromotive, anti-theft security actuator (9) which acts on the clutch lever (8), with a motorized, in particular electromotive opening drive (12) which acts independently of the inner actuating lever (5) directly on the pawl (4) and lifts it out and if necessary with a motorized, in particular electromotive, central locking actuator (13) for coupling or uncoupling an outside door handle, characterized in that the opening drive (12) also acts in one direction of actuation on the clutch lever (8), namely when the opening is actuated and the pawl (4) is lifted, the clutch lever (8) is shifted into the coupling position. Motor vehicle lock according to claim 1, characterized in that the opening drive (12) acts on an inner opening lever (19) which, on the one hand, is coupled to the pawl (4) and, on the other hand, comes into contact with the coupling lever (8) in an actuating direction. Motor vehicle lock according to claim 1 or 2, characterized in that the opening drive (12) has a worm gear (22, 23) with an eccentric adjusting element (24). Motor vehicle lock according to one of claims 1 to 3, characterized in that the central locking actuator (13) also acts in one actuation direction on the clutch lever (8), namely when the release mechanism is actuated, the clutch lever (8) is shifted into the clutched position. Motor vehicle lock according to one of claims 1 to 4, characterized in that the anti-theft actuator (9) is integrated with the central locking actuator (13).

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