EP2702218B1 - Motor vehicle door lock - Google Patents

Description

The invention relates to a motor vehicle door lock, with a locking mechanism, an actuating lever mechanism interacting with the locking mechanism, furthermore with a drive acting on the actuating lever mechanism, and with an anti-theft unit.

Such motor vehicle door locks are known in practice and are exemplified in the DE 10 2004 002 756 A1 described. In this case, the anti-theft unit serves, as is common practice, to make the actuating lever mechanism mechanically connected to the locking mechanism empty, both when the actuating lever mechanism is acted on by an internal operating lever and when actuated by an external operating lever. This ensures that even if, for example, a broken vehicle window, an unauthorized person can not open the motor vehicle door via the inside operating lever. This applies in the event that the anti-theft device is active. Then this is in the position "anti-theft device on".

If, on the other hand, the motor vehicle door lock assumes the position "anti-theft device", the associated motor vehicle door can be opened from the inside via the inside operating lever as well as from the outside via the external operating lever: this assumes, for example, that it is not a rear side door in which a possible parental control is inserted and can be. This has proven itself in principle.

In addition to motor vehicle door closures with such an anti-theft unit, those are known which additionally have a closing / opening device. Reference is made in this context to the utility model DE 20 2008 015 789 U1 , In addition, in the prior art opening devices by, for example, the DE 10 2004 052 599 A1 described, which act as opening aids. In the simplest case, such opening devices or opening aids are based on an electric drive which lifts a pawl from a catch of a closed locking mechanism. As a result, the catch can open spring-assisted and release a previously captured locking pin and consequently the associated motor vehicle door as a whole.

The prior art may not be satisfactory in all aspects.

The publication US 2011/0084505 A1 discloses a motor vehicle door lock with a locking mechanism and a lock mechanism that can assume different functional states, including the functional state "anti-theft".

The invention is based on the technical problem of further developing such a motor vehicle door lock so that operating safety is increased and malfunctions are avoided.

To solve this technical problem, a motor vehicle door lock comprises the features of patent claim 1.

In any case, the design is such that the buffer member is driven by the anti-theft device. If the locking mechanism to maintain its closed position, the buffer member is blocked by the anti-theft unit and can not work on the locking mechanism, if the operating lever mechanism is applied in an opening sense. If, on the other hand, the locking mechanism is to be opened, the anti-theft unit releases the buffer member. This can open the locking mechanism following an opening movement of the actuating lever mechanism. That is, the buffer member is controlled by the anti-theft device according to the desired functional position of the locking ("open" or "closed") accordingly.

Quite apart from this, the anti-theft device naturally follows its usual functionality already described in the introduction. That is, any actuations of the operating lever mechanism go empty with respect to the locking mechanism, as the anti-theft unit is in its "inserted" position. That is, in this functional position, the anti-theft unit consistently ensures that any movements of the operating lever mechanism via the buffer member are not transmitted to the locking mechanism. Rather, the buffer member learns in such a procedure, a more or less pronounced compression or deflection, and without this, the locking is affected in any way.

Only when the anti-theft device is transferred to its "designed" position, the operating lever mechanism can act on the locking mechanism in the opening direction. For in this case, for example, opening movements of the actuating lever mechanism are transmitted again to the buffer member, which transmits these movements due to the elimination of its blockade by the anti-theft unit on the locking mechanism to the opening. The interpretation will always be such that in the position "anti-theft device inserted" both a possible internal operating lever and an external operating lever with respect to the locking mechanism go empty.

According to the invention, an unlocking lever is assigned to the actuating lever mechanism. In most cases, the release lever is also associated with the addressed buffer member. In this case, a two-part embodiment of the buffer member has proven to be particularly favorable. In fact, the buffer member is usually composed of a tilt spring and a leg spring together.

The tipping spring generally ensures that the operating lever mechanism, depending on its position in the direction of "open" or in the direction of "keep closed" of the locking is applied. For this purpose, the tilt spring usually attacks the release lever. If this release lever has exceeded a certain position in comparison to the locking mechanism, then the tilt spring may act on the unlocking lever in the direction "open" of the locking mechanism. If, on the other hand, another position of the unlocking lever is present, the tilting spring ensures that the unlocking lever and with it the actuating lever mechanism are acted upon in the direction of "keeping closed" of the locking mechanism.

Regardless of the tipping spring is known to additionally implemented a leg spring. This leg spring interacts with one Clutch lever and on the other hand with the release lever and / or the anti-theft device. This is usually the one free leg of the leg spring on the clutch lever. Consequently, depending on the position of the clutch lever and / or an internal operating lever interacting with the clutch lever, this free leg experiences an action and can also follow this action. In contrast, the other fixed leg of the leg spring abuts against a pin of the unlocking lever. In addition, the anti-theft unit interacts with the leg of the leg of the leg in question.

For this purpose, the leg spring is advantageously mounted on the release lever. In this case, a substantially coaxial bearing to a rotational axis of the unlocking lever has proven to be particularly favorable. That is, the axis of the leg spring and the axis of rotation of the release lever generally coincide with each other.

The already mentioned and generally applied to the free leg of the leg spring clutch lever is typically mounted in at least one guide. Mostly two guides are used for the clutch lever. The two guides are usually provided in each adjacent levers. It has been proven that the one guide in an internal operating lever and the other guide are realized in the release lever. In this way, the clutch lever can easily slide along the free leg of the leg spring between its "ineffective" and "effective" positions.

If the clutch lever is "inoperative" in its position, this corresponds to the "locked" position of the motor vehicle door lock. The locking mechanism can only be opened via the inside operating lever - and not the external operating lever - if the anti-theft device additionally assumes its "off" position. On the other hand, if the clutch lever is positioned in its "operative" position, then the vehicle door latch is "unlocked" in its entirety. Also in this case, any movements of the operating lever mechanism are only transferred in an opening sense on the locking mechanism when the anti-theft unit assumes its position "designed". Otherwise, actuations of the actuating lever mechanism cause the operating lever mechanism to work in a deforming sense on the buffer member without the locking member experiencing an opening. In principle, the anti-theft device in this functional position "unlocked" can also be designed mechanically by the actuating lever mechanism operated in the opening direction.

Fig.1

den erfindungsgemäßen Kraftfahrzeugtürverschluss in einer Übersicht in der Stellung "entriegelt" sowie Diebstahlsicherungseinheit "ausgelegt",

Fig. 2

den Kraftfahrzeugtürverschluss nach Fig. 1 bei einem elektrischen Öffnungsvorgang,

Fig.3

den Kraftfahrzeugtürverschluss nach den Fig. 1 und 2 in verriegeltem Zustand mit eingelegter Diebstahlsicherungseinheit und

Fig.4

den Gegenstand nach den Fig. 1 bis 3 im Zuge eines mechanischen Öffnungsvorganges.

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

Fig.1

the motor vehicle door lock according to the invention in an overview in the position "unlocked" and anti-theft unit "designed",

Fig. 2

the motor vehicle door lock after Fig. 1 in an electric opening process,

Figure 3

the motor vehicle door lock after the Fig. 1 and 2 in locked state with inserted anti-theft unit and

Figure 4

the object according to the Fig. 1 to 3 in the course of a mechanical opening process.

In the Fig. 1 a motor vehicle door lock is shown, which is equipped with a merely indicated locking mechanism 1, 2. In fact, one recognizes consistently in the figures, a pawl 1, which interacts with a rotary latch 2 in the usual manner. Which is not expressly shown. For the pawl 1 and the rotary latch 2 are summarized placed in a plane perpendicular to each of the illustrated planes level. With the ratchet 1, 2 interacts an operating lever mechanism 3, 4, 16, which is composed in detail of a release lever 3, an internal operating lever 4 and coupling levers 16 and finally cooperates with a release lever 5 in the example. In principle, even more levers can be realized, for example, an external operating lever, another clutch lever, etc., which, however, are not shown and are irrelevant to the invention to be described. In addition, a drive 6 to 9 can be seen, which acts on the operating lever mechanism 3, 4, 16. Finally, the basic structure includes an anti-theft unit 10, 11.

In the context of the invention, the operating lever mechanism 3, 4, 16 and the release lever 5, a buffer member 12, 13 assigned. This buffer member 12, 13 is driven by the anti-theft unit 10, 11. This depends on the desired functional position of the locking mechanism 1, 2. In other words, the anti-theft unit 10, 11 releases or blocks the buffer member 12, 13. In the context of the embodiment, the buffer member 12, 13 is composed of a leg spring 12 and a tilt spring 13, so it is designed in two parts. Depending on the position of the unlocking lever 5 and consequently of the actuating lever mechanism 3, 4, 16, the tilting spring 13 as a whole ensures that the unlocking lever 5 is acted upon in the direction "open" or "keep closed" of the locking mechanism 1, 2.

If, for example, the unlocking lever 5 is in the "locked" position of the motor vehicle door lock Fig. 3 , so the tilt spring 13 acts on the release lever 5 so that it is acted upon in the indicated counterclockwise direction about its axis 14. On the other hand, takes the tilt spring 13 and the associated release lever 5 to the position Fig. 2 "Unlocks", so acted on the tilt spring 13, the release lever 5 such that it performs a rotation in the illustrated clockwise direction about its axis 14. As a result, the release lever 3 in the functional position after Fig. 2 when the "electric opening" shown there with the extension arm 15 to work on the pawl 1 and the pawl 1 in this process of the associated and not shown rotary catch 2 stand out. The ratchet 1, 2 is logically at the end of the movement shown Fig. 2 "electrically open" also open.

In contrast, the leg spring 12 interacts on the one hand with a clutch lever 16 and on the other hand with the release lever 5 and / or the anti-theft unit 10, 11. For this purpose, the one free leg 12a of the leg spring 12 abuts on the clutch lever 16, which on the free leg 12a in question the leg spring 12 predominantly linear along can slide. In contrast, the other fixed leg 12b of the leg spring 12 is supported on a stop 17 of the unlocking lever 5. In addition, this leg 12b of the leg spring 12, the anti-theft unit 10, 11 associated with its eccentric 11. Depending on the position of the anti-theft unit 10, 11, the eccentric 11 blocks the fixed leg 12b of the leg spring 12 and holds the leg spring 12 as it were. This applies to the position "anti-theft device inserted". If, on the other hand, the anti-theft unit 10, 11 is "designed" in its position, then the eccentric 11 releases the fixed leg 12b of the leg spring 12 in question.

The leg spring 12 is mounted substantially coaxially in comparison to the release lever 5 on this. That is, the axis of rotation of the leg spring 12 largely coincides with the axis of rotation 14 of the release lever 5. In addition, the design is usually made so that the previously already referred to drive 6 to 9 is designed as an opening drive. For this purpose, the drive 6 to 9 is composed of an electric motor 6 and an output screw 7 driven by the electric motor 6. The output worm 7 meshes with the outer peripheral side with a driven pulley 8, which in turn carries an eccentric 9. In this way, the drive 6 to 9 interact with the release lever 3.

The release lever 3 is in the position after the Fig. 3 , so the drive or opening drive 6 to 9 in the context of the electric opening passage after Fig. 2 First of all for the fact that the release lever 3 is transferred from its initial position shown in solid lines in the position shown in phantom (see. Fig. 2 ). This worried the eccentric 9, which abuts an arm of the release lever 3 and the release lever 3 is pivoted about its axis 18 in this case counterclockwise.

Through this process, the previously blocked clutch lever 16 is released. In fact, the coupling lever 16 in question is mounted in two guides 19, 20. In this case, there is a guide 19 for the clutch lever 16 in the inner operating lever 4, whereas the other guide 20 is realized in the release lever 5. The clutch lever 16 engages with a cam 21 in the guide 19 of the inner actuating lever 4 and is thereby held captive in the respective guide 19 of the inner actuating lever 4 and also the guide 20 in the release lever 5 and guided linearly.

It can be seen that the clutch lever 16 is further equipped with a pin 22 which slides on the free leg 12a of the leg spring 12 along. Goes the clutch lever 16 of his in the Fig. 2 shown right and "inoperative" position ("locked") in the left and "effective" position (unlocked) via, so slides the questionable pin 22 at the free end 12 a of the leg spring 12 in a radially outer position. As a result, the leg spring 12 experiences an increasing load. In addition, the clutch lever 16 is released with its cam 21 of the release lever 3 and moves in this regard in a recess 23 on the trigger lever 3 a.

The operation is as follows. In the Fig. 1 is the position (mechanically) "unlocked" and then the mechanical opening at "laid out" anti-theft device 10, 11 shown. It can be seen that, first of all, the release lever 3 moves counterclockwise about its axis 18, starting from the locked position Fig. 3 has performed. This transition of the trigger lever 3 from the position "locks" after Fig. 3 in the position "unlocked" according to the Fig. 1 can be initiated mechanically by the inner operating lever 4 slightly clockwise order its axis 18 is pivoted, as is an arrow in Fig. 3 suggests. In fact, the inner operating lever 4 and the release lever 3 are designed to be coaxially rotatable about the common axis 18.

This process causes the clutch lever 16 moves with its cam 21 in the recess 23 of the release lever 3. This process is supported by the fact that the tilt spring 13 in this case acts on the release lever 5 in a clockwise direction, as the Fig. 2 makes it clear. In any case, after this mechanical unlocking of the internal operating lever 4 with the clutch lever 16 and the cam 21 carried by the clutch lever 16 in abutment against the release lever 3 in the associated recess 23. As soon starting from this functional position Fig. 1 the inner operating lever 4 is pivoted about its axis 18 in the counterclockwise direction, as the Fig. 1 indicates, this takes the clutch lever 16 takes over the voltage applied to the free leg 12 a pin 22 that the leg spring 12 is acted upon.

Since the leg spring 12 with its fixed end 12b is not blocked by the anti-theft unit 10, 11 or its eccentric 11, because the anti-theft unit 10, 11 is in the "designed" state, the leg spring 12 takes the release lever 5 "in this process. With". For this purpose, the fixed leg 12b of the leg spring 12 engages the stop 17 of the unlocking lever 5. The unlocking lever 5 thus performs a pivoting movement in the clockwise direction about its axis 14, as they are already in the Fig. 2 and also in the Fig. 1 is indicated. As a result, the release lever 5 ensures that the pawl 1 can be lifted off the catch 2 via the operating lever mechanism 3, 4, 16. The locking mechanism 1, 2 has been mechanically opened.

A similar scenario will appear in the Fig. 2 observed. Here the process "electrical opening" is depicted. In this electric opening, the release lever 3 must first be "unlocked" by the drive or opening drive 6, 7, 8, 9, as in the Fig. 2 dash-dotted lines is shown. In contrast, the position "locked" corresponds to the release lever 3 to its solid position. In order to achieve this position change, the eccentric 9 of the drive 6, 7, 8, 9 strikes against an arm of the release lever 3 and ensures that the release lever 3 in the transition from the position shown in solid "locked" in the position shown in phantom a slight Counterclockwise movement corresponding to the direction of the arrow around its axis 18 performs while the pawl 1 lifts.

As a result, the clutch lever 16 can retract with its cam 21 in the recess 23 of the release lever 3. This process has the consequence that the leg spring 12 undergoes an increasing load on its free leg end 12a, because the clutch lever 16 is moved radially outwardly and the voltage applied to the clutch lever 16 pin 22, the free leg end 12 of the leg spring 12 increasingly applied with force , If the anti-theft unit 10, 11 is designed at the same time during this process (compare the arrow in FIG Fig. 2 ), so the unlocking lever 5 undergoes the indicated rotation in a clockwise direction about its axis 14, because the leg spring 12 is acted upon at its free leg end 12a. This is done either by the pin 22 or supplementarily in that the internal operating lever 4 about its axis 18 in the counterclockwise direction as shown Fig. 1 is pivoted. In any case, the application of the leg spring 12 at its free leg end 12a ensures that the fixed leg end 12b on the stop 17, the release lever 5 in the direction of rotation in the clockwise direction about the axis 14 entrains.

The process "anti-theft device 10, 11 interpret" can be made both electrically and mechanically. Either way, this process corresponds to the fact that the eccentric 11 "inserted" from the previously assumed position corresponding to Fig. 3 respectively after Fig. 2 is pivoted in the arrow direction and then the position "designed" according to the Fig. 4 or according to Fig. 1 occupies. As a result, the fixed leg end 12b of the leg spring 12 is released from the anti-theft unit 10, 11 or the eccentric 11 and the unlocking lever 5 can pivot around its axis 14 in the clockwise direction as described. As a consequence, the pawl 1, which is then acted upon by the release lever 3 via the actuating lever mechanism 3, 4, 16, is again lifted off the associated rotary latch 2.

In the functional position after the Fig. 3 the motor vehicle door lock is in the "locked" position. For the clutch lever 16 rests with its cam 21 on the release lever 3 and is blocked by the release lever 3. In addition, the anti-theft device 10, 11 is "inserted" in its functional position, so that the leg spring 12 is clamped on the one hand between the blocked clutch lever 16 and on the other hand the eccentric 11 of the anti-theft unit 10, 11. On this basis, an unlocking takes place only in the event that the internal operating lever 4 is pivoted slightly clockwise about its axis 18, as an arrow in the Fig. 3 indicates and at the transition from the Fig. 3 to Fig. 4 becomes clear. Because then, the clutch lever 16 can be moved with its cam 21 along the guide 19 in the inner operating lever 4 and the cam 21 of the clutch lever 16 is able to immerse in the recess 23 on the release lever 3. For this purpose, the clutch lever 16 acting in a corresponding sense acting and not explicitly illustrated spring responsible. An adjoining action on the inner actuating lever 4 in the opening sense by a counterclockwise movement about the axis 18 then starts, starting from the functional position Fig. 2 to the fact that the trigger lever 3 is taken, occupies its dash-dotted line position.

If the anti-theft device 10, 11 "designed" in this process, this process results in that the release lever 5 is pivoted about its axis 14 in the clockwise direction and the locking mechanism 1, 2 via the operating lever mechanism 3, 4, 16 by the release lever 3 in opening sense acted upon.

Claims (10)

1. Motor vehicle door lock, having a locking mechanism (1, 2), an actuating lever mechanism (3, 4, 16) interacting with the locking mechanism (1, 2), furthermore a drive (6, 7, 8, 9) acting on the actuating lever mechanism (3, 4, 16), and an anti-theft protection device (10, 11), wherein a buffer element (12, 13) is assigned to the actuating lever mechanism (3, 4, 16) and a unlocking lever (5) interacting with the actuating lever mechanism (3, 4, 16), the buffer element being controlled by the anti-theft protection device (10, 11) according to a desired functional position of the locking mechanism (1, 2), characterized in that the buffer element (12, 13) is formed two-part with a leg spring (12) and a tilt spring (13) such that the leg spring (12) interacts on the one hand with a coupling lever (16) and on the other hand with the unlocking lever (5), and that the one free leg (12a) of the leg spring (12) lies against the coupling lever (16) and the other fixed leg (12b) against a pin (17) of the unlocking lever (5).
2. Motor vehicle door lock according to claim 2, characterized in that the tilt spring (13) acts on the unlocking lever (5) depending on its position in direction "open" or "keep closed" of the locking mechanism (1, 2).
3. Motor vehicle door lock according to one of the claims 1 or 2, characterized in that the leg spring (12) is mounted on the unlocking lever (5) with substantially equal axis with its pivot axis (14).
4. Motor vehicle door lock according to one of the claims 1 to 3, characterized in that the drive (6, 7, 8, 9) is formed as opening drive (6, 7, 8, 9) and comprises an eccentric (9) for this being driven by an electric motor (6).
5. Motor vehicle door lock according to one of the claims 1 to 4, characterized in that the drive (6, 7, 8, 9) interacts with a release lever (3).
6. Motor vehicle door lock according to claims 1 to 5, characterized in that the unlocking lever (5), in the position "unlocked", releases the coupling lever (16), which was before blocked.
7. Motor vehicle door lock according to one of the claims 1 to 6, characterized in that the coupling lever (16) is mounted in at least one guiding (19, 20).
8. Motor vehicle door lock according to claim 7, characterized in that two guidings (19, 20) for the coupling lever (16) are provided, which are realized each in neighboring levers (4, 5).
9. Motor vehicle door lock according to claim 8, characterized in that the one guiding (19) is realized in an inner actuating lever (4) and the other guiding (20) in an unlocking lever (5).
10. Motor vehicle door lock according to one of the claims 1 to 9, characterized in that the anti-theft protection device (10, 11) is equipped with an motor (10) and an eccentric (11), on which the motor (10) acts on, for blockage of the fixed leg (12b) of the leg spring (12).

Images