EP1759078B1 - Motor vehicle door latch - Google Patents

Abstract

The invention concerns a motor vehicle door latch which comprises at least one actuating lever (1, 2, 3). An anti-theft system (4, 5, 6, 7) and a child-proof catch system (8) are also provided. According to the invention, the two security systems (4, 5, 6, 7, 8) mentioned can be impinged upon by means of a common control element (9, 10) .

Description

The invention relates to a motor vehicle door lock, with at least one actuating lever, further with an anti-theft device, and with a child safety device. The operating lever is usually an inside operating lever and an outside operating lever which can also operate on an operating main lever. This is not mandatory.

A motor vehicle door lock of the embodiment described above is known, including, for example, on the EP 0 826 855 A2 is referenced. Comparable goes the DE 199 56 674 A1 in front. The known devices have basically proven, but are structurally complicated and rely on a vielheblige mechanics and several drive motors back. That drives up the costs. This is where the invention starts.

The invention is based on the technical problem of further developing a motor vehicle door lock of the design described at the beginning in such a way that the construction is simplified as a whole and thus reduced production costs can be expected.

To solve this technical problem is a generic motor vehicle door lock in the invention by the characterizing features of claim 1.

It is understood that the motor vehicle door lock has a locking mechanism consisting essentially of catch and pawl, which with the aid of Inside operating lever and / or external actuating lever is opened by, for example, the associated lever with the interposition of a trigger lever lifts the pawl.

According to the general terminology, the child safety device designates a unit with the aid of which, in particular, locks or motor vehicle door closures arranged in the rear can not be opened from the inside. Nevertheless, an occupant is usually able to make an unlocking from the inside to z. B. to let an assistant open the door from the outside. The external operation works unchanged. The anti-theft device additionally sets the inner opener or the inner operating lever and the locking element (unlocking from inside and / or outside) out of action. As a result, it is not possible to transfer an associated motor vehicle door lock when the anti-theft device is in the unlocked state, even when the window is turned on. In general, the locking element is designed as a central locking element or part of a central locking unit.

The interacting both with the anti-theft device and the child safety device control according to the invention has a pivoting control lever, which has two interaction contours for engagement with a control drive. In detail, the control drive may have a drive motor, a gear unit and an eccentrically arranged control cam. The two interaction contours may be formed as recesses or fork contours and have at least two control surfaces, on the one hand for representing the child safety function and on the other hand for defining the anti-theft function. To be able to assume these functional positions, the control cam of the control drive engages the associated control surfaces or dives into the corresponding recesses.

The control preferably has and in addition to the control lever via a coupling element. The coupling element ensures that in the position of the control "child safety off" a continuous mechanical connection of the inner actuating lever or actuating lever is made to the locking mechanism. For this purpose, the internal control lever is formed in detail in two parts with (inside) operating handle lever and (inside) actuating trigger lever, which are coupled and decoupled by means of the coupling element.

In the "child safety off" position, the two aforementioned partial levers of the inner actuating lever are mechanically connected to one another, so that a continuous mechanical connecting chain to the locking mechanism is realized. On the other hand, the "child-lock on" position corresponds to the inner-operation-grip lever becoming empty with respect to the inside-operation release lever. The Innenbetätigungsauslösehebel is therefore not able to act on a triggering lever acting on it to open the locking mechanism.

The two previously discussed interaction contours are on the one hand designed as a child safety contour and on the other hand as anti-theft contour. In this case, the control is acted upon in each case only in one direction of rotation of the control drive and ensures in this one direction of rotation both that the position "child safety on" and "theft protection on" are taken by the pivoting control lever or the control in the whole. This contributes to the reliability, because the control drive always first the position "child safety on" and only then "theft protection a" can represent in this order. In this case, starting from the unloaded position of the control element or pivotable control lever, first the position "child safety lock on" is assumed during one revolution of the control cam, during the second revolution of the control cam, the control element is subsequently transferred to the "anti-theft position" position. In general, the actuating lever works on a locking element, which is additionally provided and whose position is changed by the already mentioned central locking unit or locking device.

The locking element is guided in a recess of the release lever and interacts with the external operating lever. As a result, the external actuating lever can open the release lever and consequently the locking mechanism via the aforementioned locking element or the clutch lever. If the motor vehicle door lock is "locked" in its position, the central locking unit and a central locking drive there ensure that the coupling lever or the locking element leaves the previously indicated position. As a result, the external operation lever can not (more) act on the release lever.

If now also the anti-theft device in their position "on" transferred by the control cam, the control or the control lever on his position "child safety on" also pivoted into the position "anti-theft on", so the locking element or the clutch lever is inoperative , Because any movements in the recess of the release lever are prevented by the pivoted into the trajectory control or the control lever.

Finally, at least two sensors are provided which serve on the one hand to query the control element and on the other hand the control drive. In this way, a sensor querying the sensors control system is informed at any time about the actual state of the motor vehicle door lock. Even if both sensors should fail, the control drive for the control without reversing the direction of the inserted anti-theft device Do not change position, because the control drive in befindlichem in theft prevailing position control lever at Bestromen to block. The associated increase in the current absorbed by the control drive or drive motor can be evaluated by the control system.

Finally, the central control lever may be equipped with a locking leg, which cooperates with an associated locking contour. In this way, the manual operation when inserting the child safety device is facilitated and a safe electromechanical triggering guaranteed.

As a result, the presented solution with the central control element or pivotable control lever with two interaction contours initially convinces by a simple and cost-effective construction. Because both for the operation of the child safety device and the anti-theft device, the presented teaching accesses the central control element, which in turn is acted upon by means of the control drive. In addition, the control drive operates in one direction of rotation to "on" the position of child safety and anti-theft device, which further simplifies the functional safety and the structure.

The positions "Child Lock On" and "Theft Lock On" are each taken with the help of the control cam, which abuts against control surfaces of the interaction contours or Gabelaufnahmen and so ensures the pivoting of the control lever. Both the child safety device and the anti-theft device can be manually operated beyond. In the former case, this provides an extension of the child safety lever, which engages in a recess on the central control lever. The manual operation of the anti-theft device may accomplish an external locking unit, e.g. B. a lock cylinder, which via an outside locking lever on the zen acts tral control lever, preferably via a cam on the central control lever acts on this.

As a result of the two sensors, a secure position detection is achieved, which informs the connected control system at any time on the position of the one hand, the control lever and on the other hand, the control drive. The control drive not only has the control cam, but in addition a control disk with an operating contour for the associated sensor. Here are the main benefits.

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

Fig. 1

den erfindungsgemäßen Kraftfahrzeugtürverschluss in der Position "Diebstahlsicherung aus" sowie "Kindersicherung aus" mit sämtlichen für die Erfindung relevanten Bauteilen,

Fig. 2 bis 5

den Übergang in die Stellung "Kindersicherung ein" sowie Diebstahlsicherung unverändert "aus",

Fig. 6

den Kraftfahrzeugtürverschluss in der Position "Kindersicherung ein",

Fig. 7

den Kraftfahrzeugtürverschluss nach Fig. 6 beim Übergang in die Stellung "verriegelt",

Fig. 8

den Kraftfahrzeugtürverschluss während der Einnahme der Position "Diebstahlsicherung ein",

Fig. 9

den Kraftfahrzeugtürverschluss in der Stellung "Diebstahlsicherung ein" und

Fig.10

den Kraftfahrzeugtürverschluss in der Position "'Diebstahlsicherung ein" bei ergänzend bestromtem Steuerantrieb.

Show it:

Fig. 1

the motor vehicle door lock according to the invention in the position "anti-theft device off" and "child safety device off" with all components relevant to the invention,

Fig. 2 to 5

the transition to the position "child protection on" and the theft protection unchanged "off",

Fig. 6

the motor vehicle door lock in the position "child safety lock on",

Fig. 7

the motor vehicle door lock after Fig. 6 at the transition to the position "locked",

Fig. 8

the motor vehicle door lock while taking the position "anti-theft device on",

Fig. 9

the motor vehicle door lock in the position "anti-theft device on" and

Figure 10

the motor vehicle door lock in the position "'anti-theft device on" with additionally energized control drive.

The figures show a motor vehicle door lock which has at least one internal operating lever 1, 2, an external actuating lever 3, an anti-theft device 4, 5, 6, 6 ', 6 ", 7 as well as a child safety device 8. According to the invention, both aforementioned safety devices can be used 4, 5, 6, 6 ', 6 ", 7; 8 act on by means of a common control element 9, 10, so that either the one operating lever 1, 2, the other operating lever 3 or both operating lever 1, 2, 3 go empty or a locking element 7 is inoperative. As part of the presentation, the control 9, 10 ensures at least for taking the position of child safety "on / off" and "theft protection on" and optionally "theft protection off". The states "unlocked" and "locked" additionally require a locking device 4, 5, 6, 6 'and 6 "as part of the anti-theft device 4, 5, 6, 6', 6", 7.

As usual, the empty movement of the inner actuating lever 1, 2 corresponds to the child-safety device 8 being in the "child-safety on" position, whereas both actuating levers 1, 2; 3 go empty when the motor vehicle door lock assumes its position "locked". If, in addition, there is still a locking element 7 of the anti-theft device 4, 5, 6, 6 ', 6 ", 7 without function, then the anti-theft device 4, 5, 6, 6', 6", 7 is in its position "anti-theft device on" ,

In particular, based on the Fig. 1 it can be seen that the control element 9, 10 has a pivotable about an axis A control lever 9, which has two interaction contours 11, 12 for engagement with a control drive 13, 14, 15, 16 has. The control drive 13, 14, 15, 16 is composed in detail of a drive motor 13, a worm 14 and a worm 14 meshing with the cam wheel 15, wherein the cam wheel 15 carries an eccentric cam or cam 16, which interacts with the interaction contours , 12 cooperates, as will be described in more detail below.

To the control element 9, 10 further includes a coupling element 10, which in the position "child safety off" the child safety device 8 ensures a continuous mechanical connection of the inner actuating lever 1, 2 to a locking mechanism, not shown. Actually, the inner operation lever 1, 2 is composed of an inner operation handle lever 1 and an inner operation release lever 2.

The inner operating handle lever 1 is with only one indicated (inner) handle 17 to its application in mechanical operative connection. The inner operation release lever 2 engages a release lever 18 when the inner operation lever 1, 2 is pivoted about its axis A in the clockwise direction. These movements correspond to pulling movements on the handle 17 to open the motor vehicle door lock. As a result, the release lever 18 is pivoted about its axis B in a clockwise direction and lifts the locking pawl, not shown, of the locking mechanism.

This succeeds only if the child safety device 8 is in the "child safety off" position and, moreover, the motor vehicle door lock is not locked or secured against theft. This condition can be recognized in the Fig. 1 to 4 , Then the inside operating handle lever 1 and the Innenbetätigungsauslösehebel 2 mechanically connected to each other, by the coupling element 10, which is controlled by the control lever 9. The coupling element 10 is rotatably mounted in the context of the embodiment and not limiting on the Innenbetätigungsauslösehebel 2.

If, on the other hand, the child safety device is to be inserted, the child safety device 8 must be transferred to its "child safety on" position, as described in US Pat Fig. 6 as the final state of the movement of the child safety device 8 - starting from the Fig. 2 - can be seen. For this purpose, in the starting position after Fig. 2 the control drive 13, 14, 15, 16 energized, in such a way that in the context of the embodiment of the associated control cam 16 at the transition from the Fig. 2 about the Fig. 3 and 4 right up to the Fig. 5 completed in about a full circle in a clockwise direction. At the same time receives in this process, a sensor 19 of two sensors 19, 20 an alternating and dependent on an actuating contour 21 on the back of the cam disk 15 signal.

In fact, the actuating contour 21 has two substantially opposite indentations 22, which enclose an angle α of approximately 120 ° between them. In the functional position to Fig. 3 the sensor 19 has reached the first indentation 22. This circumstance corresponds to the fact that the realized in this position microswitch 19 is turned off, whereas the operating contour 21 outside of the indentations 22 continuously holds closed to the respective sensor 19, 20 circuit. This has the consequence that a signal (except for when passing the bulges 22) to a controller, not shown on the part of the sensors 19, 20 is released and in this way any power interruptions are detected immediately. After re-commissioning leaves the position of the control drive 13, 14, 15, 16 and the control 9, 10 query safe.

It can be seen that the circuit described in the course of taking the position "child lock on" in the position after the Fig. 3 open at short notice and at the transition from the Fig. 4 to Fig. 5 is closed. The items "Parental lock on" and "Theft deterrent on" correspond to the Fig. 6 and 10 Respect in each case to that of the respective sensor 19, 20 belonging circuit is opened again and the power supply to the drive motor 13 is interrupted.

The control 9, 10 is initially acted upon only in one direction of rotation of the control drive 13, 14, 15, 16 and provides in this one direction of rotation both to take the position "child safety on" and the position "theft protection on". Actually, starting from the initial position, Fig. 2 reaches the position "child safety on" after a clockwise rotation of the control cam 16 and the position "anti-theft on" after another (the second) clockwise rotation of the control cam 16. The control cam 16 moves to take the position "child safety on" first in the right the two interaction contours 11, 12, which is logically referred to as parental control contour 11 and has a cooperating with the control cam 16 control surface. This can be seen in a comparative analysis of the Fig. 3 to 5 ,

By the engagement of the control cam 16 in the parental lock contour 11 of the control lever 9, the control lever 9 is also pivoted about its axis A in the clockwise direction by an angle α. This is indicated by corresponding arrows. This clockwise pivoting of the control lever 9 has two consequences. Firstly, the coupling element 10 is disengaged between the inside operating handle lever 1 and the inside operation tripping lever 2 brought, which therefore received no continuous mechanical connection more. On the other hand, the control lever 9 ensures that the child safety device 8 and the child safety lever 8, which engages with a pin 24 in a recess 23 of the control lever 9, is pivoted counterclockwise about its axis C.

This same pivoting sweeps over the parental control lever 8 even with a manual application, the in Fig. 2 is indicated by a corresponding arrow. At the end of this movement of the control drive 13, 14, 15, 16, the child safety device or the child safety lever 8 in the position "child safety on" is after Fig. 6 and the associated and the control drive 13, 14, 15, 16 querying sensor 19 and parental control sensor 19 receives a signal "off" due to the achieved bulge 22, so that the control drive 13, 14, 15, 16 is stopped.

Now the two partial levers 1, 2 are no longer connected to each other, because the control lever 9, the coupling element 10 by means of a pin 25 has pivoted out of engagement with the two partial levers 1, 2. Once the handle 17 is actuated inside the motor vehicle, such movements go empty because the Innenbetätigungsauslösehebel 2 experiences no admission and consequently the release lever 18 is not pivoted.

In contrast, an external operation is still possible, because the external actuating lever 3 can engage the locking element 7 or clutch lever 7, and this is followed by a pivoting of the release lever 18 about the axis B in the clockwise direction. Corresponding pivoting movements of the clutch lever 7 are in Fig. 4 indicated by an arrow.

The clutch lever 7 is guided in a recess 27 of the release lever 18 and can be from the anti-theft device 4, 5, 6, 6 ', 6 ", 7 to adjust, as in the transition from the Fig. 6 to Fig. 7 becomes clear. In fact, the anti-theft device drive 4, 5, 6, 6 ', 6 ", 7 via a motor 4, which operates via a screw 5 on a cam 6, the interposition of a transmission lever 6', 6" the clutch lever 7 in the recess 27th of the trigger lever 18 moves. As already described, the elements 4, 5, 6, 6 'and 6 "define the locking device 4, 5, 6, 6' and 6", thus being able to unlock the locking element 7 in the "unlocked" position (cf. Fig. 1 to 6 ) and "locked" (cf. Fig. 7 to 10 ).

When the clutch lever 7 the transition of its position from Fig. 6 to Fig. 7 performs, this transition corresponds to the fact that the motor vehicle door lock occupies the position "locked" overall. For now not only the internal operating lever 1, 2 is empty (because the child safety device 8 is inserted unchanged), but also the external operating lever 3 is no longer able to pivot the trigger lever 18 about its axis B in a clockwise direction. For this he lacks a stop 26 on the locking element or clutch lever 7 as an abutment. Rather, the external actuating lever 3 is in the position of the coupling lever 7 after the Fig. 7 to 10 empty. However, the clutch lever 7 could still be acted upon in the sense that the position "unlocked" is taken. It is conceivable here to have an outer lock on the locking element 7 to attack, to this in the recess 27 of the trigger lever 18 back down to the position corresponding to the Fig. 1 to 6 to convict. The same reaches the locking device 4, 5, 6, 6 ', 6 "with her arm 6", which the clutch lever 7 from the position Fig. 7 in the one accordingly Fig. 6 can convict.

In order to prevent this, the control drive 13, 14, 15, 16 ensures that the control lever 9 moves beyond its position Fig. 6 going further in the clockwise direction about its axis A is pivoted (angle β). In addition dives the Control cam 16 of the control drive 13, 14, 15 now in the second interaction contour or anti-theft contour 12, so that in this process in the transition from the Fig. 8 to Fig. 9 the control lever 9 undergoes the desired further pivoting.

Of this, the child safety device or the child safety lever 8 remains unaffected, because the pin 24 in the position "child safety on" after Fig. 6 has reached an arcuate portion of the recess 23 in the control lever 9, the movements of the control lever 9 in the position "anti-theft" allows, without the pin 24 on the child safety lever 8 learns a force from the control lever 9.

In the position "anti-theft device on" after the Fig. 9 and 10 is the clutch lever 7 not (more) able to pass the control lever 9 and accordingly functionless. Consequently, the vehicle door latch can not be transferred to its "unlocked" position. Of course, the anti-theft device can be motorized by the anti-theft device drive 4, 5, 6, 6 ', 6 "or cancel by a lock cylinder, which preferably acts on the central control lever 9 via a cam and this in the position Fig. 6 respectively. Fig. 2 swiveled back.

The second sensor 20 now registers the assumption of the position "anti-theft device on" by interrogating the associated actuating contour 28, which ensures a temporary actuation of the sensor 20 during the transition of the control lever 9.

Claims (9)

1. Motor vehicle door latch with at least one operating lever (1, 2, 3), a double-lock system (4, 5, 6, 7) and a child lock system (8), in which both said safety systems (4, 5, 6, 7; 8) are acted upon by a common control element (9, 10), characterized in that the control element (9, 10) contains a rotatable control lever (9), with two reciprocal action profiles (11, 12) into which a control drive can engage (13, 14, 15, 16).
2. Motor vehicle door latch according to claim 1, characterized in that the control element (9, 10) contains a coupling element (10) which in the position "child lock off" forms a continuous mechanical connection of the operating lever (1, 2, 3) to a locking mechanism.
3. Motor vehicle door latch according to one of the claims 1 to 2, characterized in that the two reciprocal action profiles (11, 12) are on one hand designed as a child-lock profile (11) and, on the other hand, as a double-lock profile (12).
4. Motor vehicle door latch according to one of the claims 1 to 3, characterized in that the control element (9, 10) is acted upon in a direction of rotation of the control drive (13, 14, 15, 16) in order to assume the "child-lock on" and "double-lock on" position.
5. Motor vehicle door latch according to one of the claims 1 to 4, characterized in that the operating lever (1, 2, 3) consists of two parts, an operating handle lever (1) and an operating release lever (2), which, with the aid of the coupling element (10), are coupled in position "child lock off" and are uncoupled in position "child lock on".
6. Motor vehicle door latch according to one of the claims 1 to 5, characterized in that the operating lever (1, 2, 3) acts upon the locking mechanism via a locking element (7), with the position of the locking element (7) being changed by a locking device (4, 5, 6, 6', 6").
7. Motor vehicle door latch according to claim 6, characterized in that the locking element (7) is guided in a recess (27) of a release lever (18).
8. Motor vehicle door latch according to one of the claims 1 to 7, characterized in that two sensors (19, 20) are provided for scanning the control element (9, 10) and for scanning the control drive (13, 14, 15, 16).
9. Motor vehicle door latch according to one of the claims 1 to 8, characterized in that the control drive (13, 14, 15, 16) with the control element (9, 10) in double lock position moves to block when energized.

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