Motor vehicle lock

Abstract

A locking device for a motor vehicle includes an actuating lever, a lock and at least one Bowden cable, which is arranged between the actuating lever and the lock, wherein the lock can be actuated by means of the actuating lever and with the help of the Bowden cable and a functional unit, which is arranged on the Bowden cable and has an electric drive, and wherein the lock can be actuated by means of the functional unit at least in an assisting manner or an actuation can be prevented.

Claims

1. A locking device for a motor vehicle comprising: an actuating lever; a lock; a Bowden cable which is arranged between the actuating lever and the lock, wherein the lock is configured to be actuated by the actuating lever and the Bowden cable; and a functional unit which is arranged on the Bowden cable and has an electric drive, wherein the lock is configured to be actuated by the functional unit, at least in an assisting manner, or an actuation of the lock is configured to be prevented by the functional unit, wherein the functional unit includes at least one deflection unit configured to deflect the Bowden cable, wherein the functional unit includes a drive element and a drive configured to activate the at least one deflection unit, wherein the drive is a gear stage connected between the electric drive and the drive element; wherein the at least one deflection unit includes a first deflection unit connected to a first part of the Bowden cable and a second deflection unit connected to a second part of the Bowden cable, wherein the first deflection unit and the second deflection unit are configured to be activated by the drive element; wherein the first deflection unit and the second deflection unit are rotatably mounted on a common central axle and are coupled by a coupling element, whereby the second deflection unit is actuated by rotation of the first deflection unit via the coupling element; and wherein the functional unit further includes a switching device that provides a control signal to the electric drive, wherein the second deflection unit includes a contour that actuates the switching device when the second deflection unit is actuated.

2. The locking device according to claim 1, wherein the drive element is made up of a gear segment.

3. The locking device according to claim 1, wherein the functional unit includes a control lever, whereby a movement of the at least one deflection unit is configured to be at least partially blocked by the control lever.

4. The locking device according to claim 1 further comprising an actuator and an additional actuating medium that works together with the actuator in such a way that a haptic acknowledgment is configured to be captured for an operator of the additional actuating medium.

5. The locking device according to claim 4, wherein the haptic acknowledgment is configured to be captured after or immediately during the actuation of the switching device.

6. The locking device according to claim 1 wherein: the first part of the Bowden cable is arranged between an activating lever and the functional unit; the second part of the Bowden cable is arranged between the functional unit and the lock; and a mechanical connection is arranged on the first part of the Bowden cable that is configured to be uncoupled from the second part of the Bowden cable.

7. The locking device according to claim 1 further comprising an actuator, wherein the at least one deflection unit is configured to be uncoupled from the actuator by the electric drive.

8. A locking device for a motor vehicle comprising: an actuating lever; a lock; a Bowden cable which is arranged between the actuating lever and the lock, wherein the lock is configured to be actuated by the actuating lever and the Bowden cable; and a functional unit which is arranged on the Bowden cable and has an electric drive, wherein the lock is configured to be actuated by the functional unit, at least in an assisting manner, or an actuation of the lock is configured to be prevented by the functional unit, wherein the functional unit includes at least one deflection unit configured to deflect the Bowden cable, wherein the functional unit includes a drive element and a drive configured to activate the at least one deflection unit, wherein the drive is a gear stage connected between the electric drive and the drive element; wherein the at least one deflection unit includes a first deflection unit connected to a first part of the Bowden cable and a second deflection unit connected to a second part of the Bowden cable, wherein the first deflection unit and the second deflection unit are configured to be activated by the drive element; wherein the first deflection unit and the second deflection unit are rotatably mounted on a common central axle and are coupled by a coupling element, whereby the second deflection unit is actuated by rotation of the first deflection unit via the coupling element; wherein the first part of the Bowden cable is arranged between an activating lever and the functional unit, the second part of the Bowden cable is arranged between the functional unit and the lock, and a mechanical connection is arranged on the first part of the Bowden cable that is configured to be uncoupled from the second part of the Bowden cable; and wherein uncoupling of the Bowden cable is configured to be performed by the electric drive.

9. The locking device according to claim 8 further comprising an actuator that is connected to the lock via the second part of the Bowden cable, and an actuating lever that works together with the actuator in such a way that a haptic acknowledgment is configured to be captured for an operator.

10. The locking device according to claim 9, wherein the functional unit has at least one switching device, wherein the switching device is arranged in the functional unit such that the haptic acknowledgment is configured to be captured after or immediately during the actuation of the switching device.

11. A locking device for a motor vehicle comprising: an actuating lever; a lock; a Bowden cable which is arranged between the actuating lever and the lock, wherein the lock is configured to be actuated by the actuating lever and the Bowden cable; and a functional unit which is arranged on the Bowden cable and has an electric drive, wherein the lock is configured to be actuated by the functional unit, at least in an assisting manner, or an actuation of the lock is configured to be prevented by the functional unit, wherein the functional unit includes at least one deflection unit configured to deflect the Bowden cable, wherein the functional unit includes a drive element and a drive configured to activate the at least one deflection unit, wherein the drive is a gear stage connected between the electric drive and the drive element; wherein the at least one deflection unit includes a first deflection unit connected to a first part of the Bowden cable and a second deflection unit connected to a second part of the Bowden cable, wherein the first deflection unit and the second deflection unit are configured to be activated by the drive element; wherein the first deflection unit and the second deflection unit are rotatably mounted on a common central axle and are coupled by a coupling element, whereby the second deflection unit is actuated by rotation of the first deflection unit via the coupling element; and further comprising: a first and second actuating medium; and a separate electric drive to uncouple the first and second actuating medium.

12. The locking device according to claim 11, wherein the at least one deflection unit works together with the first and second actuating medium; and wherein the functional unit includes a switching device, wherein the position of at least one of the first and second actuating medium is configured to be captured by the switching device.

13. The locking device according to claim 11 further comprising an actuator, wherein at least one of the first and second actuating medium works together with the actuator in such a way that a haptic acknowledgment is configured to be captured for an operator.

14. The locking device according to claim 13, wherein the actuator is positioned so as to be longitudinally displaceable in the functional unit.

Description

BRIEF DESCRIPTION OF DRAWINGS

(1) The invention is described in further detail below with reference to the attached drawings on the basis of a preferred exemplary embodiment. However, the principle applies that the execution example does not limit the invention, but only constitutes an advantageous execution form. The illustrated characteristics can be executed individually or in combination with other characteristics of the description.

DESCRIPTION OF DIAGRAMS

(2) Depicted are:

(3) FIG. 1A three-dimensional view of a functional module in the form of an opening module, whereby the opening module is arranged between two parts of a Bowden cable

(4) FIG. 2A top view of a functional unit in accordance with FIG. 1 with the connection of a first part of a Bowden cable to a first deflection unit, with dismount assistant

(5) FIG. 3 Another view of the functional unit with a second deflection unit that is connected to a second part of a Bowden cable

(6) FIG. 4A three-dimensional view of a functional unit with a drive element

(7) FIG. 5A general presentation of a functional unit with an actuating medium and a control unit as well as another medium to actuate the functional unit, whereby the functional unit is portrayed in conjunction with a motor vehicle lock

(8) FIG. 6A functional unit in accordance with FIG. 5 with a device for haptic feedback or a haptic acknowledgment for the operator

(9) FIG. 7A general presentation of a locking device for a motor vehicle with a coupling element integrated in the functional unit, that can be actuated electrically and

(10) FIG. 8 a general presentation of a locking device in accordance with FIG. 7 in an embodiment with a dismount assistant

(11) FIG. 9 a general view of a locking device for a motor vehicle with a functional unit, a motor vehicle lock, actuating media and a control unit

(12) FIG. 10 a general view of a locking device in accordance with FIG. 9 with an integrated dismount assistant

(13) FIG. 11 a general view of a locking device consisting of actuating media, a functional unit, control unit and motor vehicle lock

(14) FIG. 12 another schematic presentation of a locking device consisting of an actuating medium, functional unit and motor vehicle lock

(15) FIG. 13 a general presentation of a locking device in an alternative embodiment and

(16) FIG. 14 another embodiment of a locking device with another functionality.

DETAILED DESCRIPTION

(17) FIG. 1 shows a three-dimensional view of a functional unit 1, whereby the functional unit 1 is arranged between the first part of a Bowden cable 2 and the second part of a Bowden cable 3. The housing 4 can be mounted for example to a door module in a motor vehicle by means of elastic fastening elements 5. The functional unit 1 has a housing cover 6 which protects and seals the housing 4 of the functional unit 1. A jack 7 is arranged on the housing 4 for the electrical connection of the functional unit.

(18) The first part of the Bowden cable 2 is connected to an actuating lever 8, whereby the second part of the Bowden cable 3 is in operative connection with a lock 9. If the actuating lever 8 is actuated by an operator, whereby the first part of the Bowden cable 2 can be actuated in the direction of the arrow P1, then a movement of the Bowden cable core to the second part of the Bowden cable 3 is transferred via the functional unit 1, so that the Bowden cable core of the second part of the Bowden cable 3 is actuated in the direction of the arrow P2. The lock 9 can hereby be actuated by means of the actuating element 8 and via the Bowden cable 2, 3.

(19) FIG. 2 shows a top view of the housing 4 of the functional unit 1 without the housing cover 6. A first deflection unit 10 can be seen, which is connected with a first part of a Bowden cable core 11. A torsion spring 12 moves the first deflection unit 10 back to the starting position, when the first deflection unit 10 has been deflected anticlockwise following actuation by means of the first part of the Bowden cable core 11. The torsion spring 12 then moves the first deflection unit 10 back to its starting position, whereby the first deflection unit is moved clockwise during resetting. Where there is mention of clockwise in the description of the exemplary embodiment, this describes a movement of the first deflection unit 10 around the axle 13. There is also a coupling element 14 arranged on the first deflection unit 10 with which the first deflection unit 10 can work together with a second deflection unit.

(20) A control lever 16 is also shown that is spring-pretensioned in a clockwise direction around an axle 17. The control lever 16 hereby works together with a contour 18 on the first deflection unit 10, so that haptic feedback can be created for an operator.

(21) If the first part of a Bowden cable core 11 is actuated by means of the actuating element 8, then the first deflection unit 10 moves anticlockwise around the axle 13, until the first deflection unit makes contact with the contour 18 of the control lever 16. The operator of the motor vehicle hereby receives haptic feedback, so that it is clear to the operator that the actuating lever 8 has been sufficiently actuated to activate or initiate the functional unit 1. If however, in the event of a power cut and/or in an emergency situation, the first part of the Bowden cable core 11 continues to be actuated, then the control lever 16 will slide beyond the contour 18 and pivot anticlockwise around the axle 17. The mechanical opening of the lock 9 is thereby guaranteed at any given time.

(22) FIG. 3 shows the housing 4 of the functional unit 1, whereby a second deflection unit 15 is also placed on the axle 13. The second deflection unit 15 also has a control contour 19, whereby the control contour 19 works together with a switching device 20. A second part of a Bowden cable core 21 is connected to the second deflection unit 15, so that a rotational movement can be introduced to the second Bowden cable core 21.

(23) If the first deflection unit 10 is then actuated by means of the actuating element 8, then the first deflection unit moves anticlockwise around the axle 13, whereby the contour 18 comes against the control lever 16 to the system.

(24) The angle of rotation of the first deflection unit to reach the contour 18 on the control lever 16 is selected in such a way that the second deflection unit 15 has been twisted so far that the control contour 20 actuates the switching device 20. To move the second deflection unit 15 by means of the first deflection unit 10, the second deflection unit 15 has a positive connection that interacts with the coupling element 14. The positive fit preferably works only in an anticlockwise direction, so that the second deflection unit 15 can continue to be moved anticlockwise, without having to move the first deflection unit 10.

(25) FIG. 4 shows the functional unit 1 with a drive element 22. The drive unit 22 is hereby driven by means of a transmission stage 23 and the transmission stage 23 by means of a worm drive 24. The worm gear 24 in turn is connected directly to an electric drive 25 in the form of an electric motor. The electric drive 25 is retained in the housing 4 of the functional unit 1 by means of an elastic retaining tab 26. The drive element 22 is designed as one piece with a partially circular gear segment 27, so that a favorable torque is available to actuate the second part of the Bowden cable core 21.

(26) If the first Bowden cable core 11 is then actuated by means of the actuating element 8, then the second deflection unit 15 is actuated via the first deflection unit 10 and by means of the coupling element 14. Actuation of the second deflection unit 15 initializes the switch 20 designed as a microswitch by means of the control contour 19, so that the electric drive 25 receives a control signal and the drive element 27 is driven by means of the transmission stage 23. The drive element 22 hereby works with the second deflection unit 15, whereby the second deflection unit 15 can be driven anticlockwise. The operator comes against the contour 18 with the first deflection unit 10 and receives haptic feedback. The haptic feedback occurs exactly at the time when the switching signal is fed to the electric drive 25, so that as a result of the movement of the drive element 22 and via the second part of the Bowden cable core 21, the lock 9 is opened or unlocked or locked. The effect desired by the operator or the function desired by the operator takes place, so that there is no need to pull the operating element 8 again.

(27) If the functional unit is used for example between an inside operating lever as an actuating element 8 and a lock 9 in a motor vehicle side door, then the functional unit 1 can be initialized by pulling the actuating lever 8 and just briefly pulling the actuating lever 8, so that the lock 9 is opened. In this case, the functional unit 1 acts as a dismount assistant, whereby the dismount is made easier for the operator, thus increasing the comfort in the motor vehicle.

1st Embodiment: Procedure and Device to Electrically Open a Lock by Means of an Electric Opening Module (eÖFM)

(28) FIG. 5 shows a functional unit 28, a motor vehicle lock 29, an actuating element 30, 31 and a control unit 32. The actuating medium 30 is preferably an interior door handle which is connected to a first part of a Bowden cable 33 to a first deflection unit 34 in the functional unit 28. The first deflection unit 34 has a coupling element 35 that works together with a coupling element 36, so that the electric drive 39 can be moved. A switching device 38, for example in the form of a microswitch, is arranged on the actuator itself.

(29) If the interior door handle 30 is pulled, then the first deflection unit 34 is moved, so that the coupling element 35 engages with the coupling element 36. The first actuator 37 is hereby mobile. The movement of the first actuator 37 is detected by means of the switching device 38, so that the control unit 32 can transfer a control signal to the electric drive 39, so that for example a gear segment 40 can be activated, whereby the coupling elements 41, 42 engage and the first actuator 37 can be moved. The movement of the first actuator 37 causes the second part of the Bowden cable 43 to be actuated, so that the motor vehicle lock 29 can be unlocked and/or actuated.

(30) According to the invention, the electric drive 39 can however also be actuated via the actuating medium 31, for example an external door handle. The external door handle 31 hereby works together with a switching device 44 so that an electric signal can be transferred to the control unit 32. The control unit 32 hereby initializes and/or controls the electric drive 39 so that the first actuator 37 can be moved via the coupling elements 41,42.

(31) FIG. 6 essentially shows an embodiment according to FIG. 5. In addition to this, the functional unit 28 in FIG. 6 has a dismount assistant. The dismount assistant hereby consists of a control lever 45, which works against the first actuator 37 by means of a spring 46. The operator of the interior door handle 30 receives haptic feedback by means of the control lever45, so that actuation can be completed. The haptic feedback is arranged in such a way that the acknowledgment directly coincides with the switching of the actuator 38a or after the actuator 38a has been actuated. The electric drive 39 can then be activated by means of the actuator 38a via the control unit 32. The control lever 45, in conjunction with the spring element 46, sends feedback to the operator to inform him that the interior door handle 30 has been pulled sufficiently.

2nd Embodiment

(32) FIG. 7 shows a locking device 28, consisting of a functional unit 29, a motor vehicle lock 30, two actuating media 31, 32 and a control unit 33. The actuating element 31 is connected to a first part of a Bowden cable 34 to a deflection unit 35a in the functional unit 29. An actuator 36a is connected to the motor vehicle lock 30 via a second part of a Bowden cable 37a. A coupling element 38b that can be actuated electrically is arranged between the first deflection element 35a and the actuator 36a. Depending on the switching position of the coupling element 38b that can be actuated electrically, the actuator 36a can be moved or uncoupled from the actuator 36a by means of the actuating element 31. The electric drive 39 can be used advantageously to uncouple the first deflection unit 35a. To do so, the electric drive 39 is moved from a middle zero-position to an end position. This first end position then describes the uncoupled state of the first deflection unit.

(33) A switching device 40a is allocated to the actuating medium 32, for example an external door handle. By actuating the actuating element 32, the switching device 40a, for example a touch-sensitive sensor, can be actuated, so that a control signal 41a can be transferred to the control unit 33. The control unit 33 then initializes the electric drive 39, so that the actuator 36a is mobile and the actuator 36a can be activated for example via a gear segment 42a. The gear segment 42a hereby acts on a coupling element 43a, which in turn can work together with a coupling element 44a on the actuator 36a.

(34) If the coupling element 38b is closed, and if the actuating medium 31 is pulled, then the actuator 36a is moved which in turn can be detected by means of an actuator, so that a control signal can be transferred to the control unit 33 and the control unit 33 can act upon the electric drive 39, so that the motor vehicle door lock can be opened or actuated with electrical assistance or electrically.

(35) FIG. 8 essentially shows the locking device 28 according to FIG. 5. A control lever 46a is against the actuator 36a in a spring-pretensioned manner, in other words, by means of a spring element 47. The control lever 46a is used to give the operator haptic feedback or a haptic acknowledgment, to inform him that the actuating element 31 has been pulled sufficiently to actuate the switching device 45a. The electrical opening can now be initiated by means of the control unit 33. The haptic feedback by means of the control lever hereby allows a dismount assistant to be realized, whereby for example the interior door handle 31 only has to be actuated so far until the switching device 45a generates a signal and the electrical opening process can be started. This kind of activation enables the motor vehicle lock 30 to be opened with very little force and little stroke distance, which leads to a comfort function for the operator, since the motor vehicle lock 30 can be opened with as little as possible actuating forces on the actuating element 31.

3rd Embodiment

(36) FIG. 9 shows a locking device 28 with a functional unit 29, a motor vehicle lock 30, actuating media 31, 32 and a control unit 33. A first part of a Bowden cable 34 is arranged between the actuating medium 31 and a deflection unit 35a. An actuator 36a is connected to the motor vehicle lock 30 via a second part of a Bowden cable 37a. A coupling element 38b is provided between the deflection unit 35a and the actuator 36a, which can be switched by means of another electric drive 39.

(37) A switching device 40b is arranged on the deflection unit 35a and captures a movement between the first part of the Bowden cable 34. If the interior door handle 31 is hereby pulled, then the first part of the Bowden cable 34 is actuated, which can be captured and transferred as a switching signal to the control unit 33 via the switching device 40b. If the coupling element 38b is hereby coupled in, then a control signal is transferred to the electric drive via the control unit 33, which in turn activates, for example a gear segment 42a, so that the actuator 36a can be activated via the coupling elements 43a, 44a.

(38) Initialization of the electric drive 41c is also possible via the actuating medium 32. An switching device 45b is also allocated to the actuating medium 32, which in turn transfers a control signal 46b to the control unit 33, whereby the control unit 33 can in turn activate and actuate the electric drive 41c.

(39) As a result of the additional electric drive 39, the functional unit 29 is able to uncouple the first deflection unit 35a from the actuator 36a. By using the switching device 40b, it is hereby possible to capture the actuation of the actuating medium 31 and to release or uncouple the coupling 38b subject to the anti-theft lock or child safety lock that is installed. A child safety lock and anti-theft lock are hereby possible in the functional unit 29.

(40) FIG. 10 shows a general overview of a locking device 28, whereby the structure of the locking device 28 resembles that of the locking device 28 in accordance with the embodiment of FIG. 4. In addition to this, the locking device 28 in accordance with FIG. 10 has a dismount assistant. The dismount assistant hereby has a control lever 47a which works together with the actuator 36a via a spring element 48. If the actuating medium 31 is hereby actuated and the first part of the Bowden cable 34 moves the deflection unit 35a, then the operator of the actuating medium 31 receives haptic feedback, in other words, acknowledgment that the deflection unit 35a is moving against a control contour. This haptic acknowledgment occurs a time when the switching device is actuated.

(41) The control unit 33 is hereby sent a switching signal via the switching device 40b, that in turn is used to initialize electric drive 41c, so that the functional unit can actuate the lock 30. The operator hereby only has to actuate the actuating medium 31 very briefly, preferably the interior door handle, to actuate the lock 30. The actuation of the lock 30 is hereby assisted by means of the functional unit 29, so that an assistant system in the form of a comfort module can be created. The comfort is hereby increased in that manual actuation of the Bowden cable simply has to occur so that the switching device 40b in the functional unit 29 has to be actuated.

4th Embodiment

(42) FIG. 11 shows a locking device 28. This locking device 28 consists of a functional unit 29, a lock 30, a first actuating medium 31 and a second actuating medium 32 and a control unit 33. The actuating media 31, 32 are connected by a Bowden cable 34, 35c to the functional unit 29. Another Bowden cable 37a is arranged between the motor vehicle lock and an actuator 38c.

(43) In this embodiment, the actuating elements 31, 32 work together with one deflection unit respectively. In other words, the Bowden cable 35 is connected to the deflection unit 39a and the Bowden cable 36 is connected to the deflection unit 40c. The actuator 38c in the functional unit 29 is arranged between the deflection units 39a, 40c and connected to the actuator 38c by means of an electric coupling 41d, 42b. The coupling elements 41d, 42b are connected to the electric drives 43b, 44b and can be actuated or coupled or uncoupled by means of the electric drives 43b, 44b. A switching device 45c is arranged on the first deflection unit or in the actuating link of the Bowden cable 35c.

(44) The switching device in turn is connected electrically to the control unit 33, so that a control signal can be transferred from the control unit to the electric drive 43b. The control unit 33 in turn is connected electrically to the switching device 45c and the electric drives 43b, 44b.

(45) The locking device 28 allows a power lock, an anti-theft lock and a child safety lock to be mapped in the functional unit 29. The power lock can be inserted via the control unit 33, electric drive 44b and coupling element 42b. The Bowden cable 36b or the actuating medium 32 is hereby uncoupled from the actuator 38c. An anti-theft lock or a child safety lock can be mapped in the functional unit 29 by means of the control 33, electric drive 43b, coupling element 41d and switching device 45c.

(46) FIG. 12 shows a locking device 28 in accordance with FIG. 5, whereby an additional switching device 46c is arranged in the motor vehicle lock 30. The switching device 46c monitors the position of the catch. The design of the anti-theft lock can be controlled by surveying the catch switch 46c. A power lock and anti-theft lock can be mapped with a locking device 28 in accordance with FIG. 12.

(47) It is however important to mention that the functional unit 29 can also be developed with just an electric drive 43b, 44b, whereby an additional microswitch is needed though for the electric drive 43b, 44b, so that a middle zero-position of the electric drive 43b, 44b can be determined. Depending on the rotational movement of the electric drive, an anti-theft lock or power lock can then be mapped in the functional unit 29.

5th Embodiment

(48) FIG. 13 shows a locking device 28 with an external door handle 29, an interior door handle 30 as actuating medium, a functional unit 31, a motor vehicle lock 32 and a control unit 33. A Bowden cable 34 is arranged between the external door handle 29 and the motor vehicle lock 32. A first part of a Bowden cable 35d is in operative connection with a second part of a Bowden cable 36c via the functional unit 31. The functional unit 31 has a first actuator 37b that is connected with another second actuator 39b via a coupling element 38d. The coupling element 38d in this embodiment is designed as an electric coupling element 38d and can be uncoupled or coupled by means of the electric drive 40d. The motor vehicle lock also has another electric drive 41e that is used to uncouple the external door handle 29 from the motor vehicle lock 32.

(49) If the external door handle is connected for example to an external actuating lever in the motor vehicle lock 32 by means of the Bowden cable 34, then the motor vehicle lock 32 can for example be unlocked by means of the external door handle 29.

(50) Another option to unlock the motor vehicle lock 32 is to pull the interior door handle 30, whereby the first actuator 37b is moved via the first part of the Bowden cable 35d and, in the case of the coupled in coupling 38d, the second actuator 39b can be moved. The movement of the other actuator 39b then causes the Bowden cable core of the Bowden cable 36c to unlock the motor vehicle lock 32 for example.

(51) The Bowden cable 34 can be uncoupled from the motor vehicle lock by means of the electric drive 41e in the motor vehicle lock 32 and a power lock can be mapped in the locking device 28.

(52) The first actuator 37b can be uncoupled from the other actuator 39b by means of the electric drive 40d, so that for example an anti-theft lock can be mapped in the locking device 28.

(53) FIG. 14 shows a general view of a locking device 28, whereby the functional unit 31 also has a switching device 42c. Actuation of the first part of the Bowden cable 35d can be captured or detected by means of the switching device 42c. Actuation of the first part of the Bowden cable 35d by means of the interior door handle 31 causes the switching device 42c to generate a signal, which in turn can be captured by the control unit 33, so that for example a child safety lock can be mapped in the locking device 28.