EP1198652B1 - Door lock for a motor vehicle - Google Patents

Abstract

The invention relates to a door lock for a motor vehicle. The principal design of the inventive door lock comprises a rotary lock (1), a lock pawl (2) an actuation lever system (3), a latching lever system (5) and a central locking drive (10a, 10b, 11) for a central locking element (8). The central locking element (8) comprises, in addition to the first forked arm (13), at least one second forked arm (14). Both forked arms (13, 14) project at least partially into the arc of rotation of an eccentric control pin (12) of the central locking drive (10a, 10b).

Description

• Drehfalle und Sperrklinke, ferner mit
• einem Betätigungshebelsystem und einem Verriegelungshebelsystem, und mit
• einem Zentralverriegelungsantrieb für ein Zentralverriegelungselement, wobei

der Zentralverriegelungsantrieb zumindest einen exzentrischen Steuerzapfen aufweist, welcher einen Umlaufbogen beschreibt und dabei in wenigstens eine erste Gabelaufnahme des Zentralverriegelungselementes zur Darstellung der Funktionsstellungen "entriegelt" und "verriegelt" steuernd eingreift, und wobei der Steuerzapfen zusätzlich in eine Funktionsstellung "diebstahlgesichert" steuerbar ist. Das Verriegelungshebelsystem umfasst üblicherweise eine Außenverriegelung und eine Innenverriegelung. Die Außenverriegelung ist regelmäßig mit einem Schließzylinder sowie Schlossnuss ausgerüstet. Zu der Innenverriegelung gehört zumindest ein Innenverriegelungshebel. Das Betätigungshebelsystem beinhaltet im allgemeinen einen Türaußengriff sowie einen Türinnengriff.The invention relates to a motor vehicle door lock, with

• Catch and pawl, also with
• an operating lever system and a locking lever system, and with
• a central locking drive for a central locking element, wherein

the central locking drive has at least one eccentric control pin, which describes a circular arc and thereby engages in at least one first fork receptacle of the central locking element to represent the functional positions "unlocked" and "locked", and wherein the control pin is also controllable in a functional position "theft-proof". The locking lever system usually includes an external lock and an internal lock. The external locking system is regularly equipped with a locking cylinder and lock nut. The inner lock includes at least one inner lock lever. The operating lever system generally includes an outside door handle and an inside door handle.

In a motor vehicle door lock that described above Design is done so that an additional Clutch lever is provided, which locks central lever connects with the operating lever system. In the "anti-theft" function position, the Control pin the clutch lever via an additional anti-theft device on the clutch lever. - Such Procedure has generally proven itself, but it is because of the aforementioned separate anti-theft device structurally complex (see. DE-C-195 33 199).

In a similar embodiment is a Y-like recess provided in the central locking element. Within control recesses are realized in this recess, against which a control pin strikes and in this way the central locking element is pivoted. In the anti-theft position, as shown in FIG. 1 is shown, the central locking element with With the help of the well-known central locking drive clamped. Consequently, mechanical unlocking is required not easily realizable from the outside (cf. US-A 5 240 296).

The invention is based on the technical problem Motor vehicle door lock of the design described in the introduction to continue to educate that with perfect functioning with the least possible design effort is worked.

a) verriegeln;

b) entriegeln (von "verriegelt" aus);

c) diebstahlsichern und

d) entriegeln (von "diebstahlgesichert" aus).

• Selbstverständlich können auch mehr als vier Steuerflächen verwirklicht werden, wenn beispielsweise noch eine dritte Gabelaufnahme hinzutritt.

To achieve this object, the invention proposes - starting from a generic motor vehicle door lock - that the central locking element has, in addition to the first fork receptacle, at least one further second fork receptacle, both of the aforementioned fork receptacles at least partially protruding into the circular arc of the control pin. According to a preferred embodiment, the two fork receptacles are arranged on a common circular arc of an arc segment of the central locking element. In total, the two fork mounts have four control surfaces to be able to display the following control commands:

a) lock;

b) unlock (from "locked");

c) theft-proof and

d) unlock (from "theft-proof").

• Of course, more than four control surfaces can also be realized if, for example, a third fork holder is added.

The central locking element can be a central locking pin have, which together with the central locking element the positions "unlocked", "locked" and "theft-proof". So that can be done Central locking element with the help of the central locking drive swivel into the three aforementioned positions. There is a fixation in these different Positions usually realized in such a way that the central locking element in the three aforementioned Functional positions through end stops in the housing and / or is determined by detents.

The locking lever system preferably already has the addressed interior locking lever, which with the central locking element only in the positions "unlocked" and "locked" is in operative connection. With in other words, the functional position corresponds to "theft-proof" to the interior locking lever and Central locking element - as usual - not with each other are connected, i.e. an otherwise existing connection is interrupted. This is accomplished in detail that the interior locking lever in general a locking contour and an unlocking contour has. The unlocking contour acts on the central locking pin for unlocking and the locking contour on the central locking pin for locking. Both the unlocking contour and the locking contour can with pivoting movements of the internal locking lever each describe a contour arc, namely about an associated axis of the inner locking lever.

The central locking pin also defines when swiveling the central locking element about its axis a circular arc, specifically a cone circular arc. there is the topology of the central locking pin on the other hand unlocking and locking contour so chosen that each respective circular arc and peg circular arc each other for unlocking and locking - and only then - cut. In contrast, the two contour arcs run in the "anti-theft" position at a distance from the central locking pin, so that an operative connection between the central locking element and the internal locking lever does not exist in this functional position. As a result, pivoting movements of the inner lock lever are practiced no influence on the central locking element out.

Otherwise, the axes of the central locking element and the interior locking lever usually arranged parallel to each other, both of the aforementioned Components (i.e. central locking element and internal locking lever) lie in different levels and themselves partially cover, so that the desired active connection and with it a cutting of cone arcs and respective contour arc can be represented, and only for locking or unlocking.

In the context of the invention is not only the DE-C-195 33 199 known anti-theft device but also without an internal locking button. With others Words, the interior locking lever takes over at the same time its function. This can be done in such a way that the interior locking lever is spring-supported after each actuation takes its rest position. Otherwise, the Internal locking lever regularly by means of an operating rod or an actuating bowden cable to a ' Inner door handle connected, unlocking or locking the motor vehicle door lock a double actuation of the inside door handle required. As part of a The first stroke of the double-stroke internal actuation will be Door lock - "locked" based on its position - unlocked. As part of the second stroke of the inside door handle the door lock is opened in the same way Direction. This is with reference to the figure description to be explained in more detail.

Overall, with the motor vehicle door lock shown the three positions "unlocked", "locked" and "theft-proof" extremely simple and functional represent. First of all, that only one drive, namely the central locking drive, is used, and an im State of the art also provided separate anti-theft drive eliminated. This also applies to the DE-C-195 33 199 Mandatory anti-theft device. Consequently, a construction is realized using extremely few functional elements because overall two fork mounts on the central locking element below Definition of four control surfaces are realized. By the coupling described between the internal locking lever and central locking lever only for unlocking or Can lock on a blockage of the central locking element waived in the anti-theft position as it considers US-A-5 240 296 to be indispensable. Consequently, the motor vehicle door lock described can in the "anti-theft" position without further ado by means of a locking cylinder (to be operated from the outside) open with lock nut. Nevertheless, it is guaranteed that in this function position an opening of the associated Motor vehicle door - even with the window broken - does not succeed because of the inside handle and consequently the Empty the interior locking lever. Here are the. To see essential advantages of the invention.

Fig. 1

den erfindungsgemäßen Kraftfahrzeugtürverschluss mit Zentralverriegelungselement und Innenverriegelungshebel,

Fig. 2

einen vergrößerten Ausschnitt aus Fig. 1 im Bereich des Zentralverriegelungszapfens und

Fig. 3

die zum Kraftfahrzeugtürverschluss nach Fig. 1 gehörige Schlossmechanik, welche rechtwinklig zu den in Fig. 1 dargestellten Elementen angeordnet ist.

In the following, the invention is explained in more detail with reference to a drawing that shows only one exemplary embodiment; show it:

Fig. 1

the motor vehicle door lock according to the invention with a central locking element and an internal locking lever,

Fig. 2

an enlarged section of FIG. 1 in the area of the central locking pin and

Fig. 3

1 belonging to the motor vehicle door lock according to FIG. 1, which is arranged at right angles to the elements shown in FIG. 1.

A motor vehicle door lock is shown in the figures, which in the usual way can be seen in FIG Has catch 1 with pawl 2. According to the embodiment it is an electric motor driven pawl, as they are basically in the German patent application 196 50 826 is described on which is expressly referred to. Of course is also a purely mechanical trigger at this point Pawl conceivable.

In addition, the basic structure includes an operating lever system, which in the present case has an inside door handle 3 with connected operating rod 4 or operating bowden cable includes. About this operating rod 4 or the actuating bowden cable acts on the inside door handle 3 an internal locking lever 5 or a pin there. 6. In addition to the drawn inside door handle 3 can of course also an outside door handle expressly not shown be realized.

The inner locking lever 5 belongs to the locking lever system, to which also a not explicitly drawn Lock cylinder with lock nut 7 is to be expected. This Lock nut 7 is directly over the lock cylinder or actuated a key inserted there. Rotations of the Locknut 7 correspond directly to pivoting movements a central locking element 8, present a central locking lever 8. This can be done on it return that the lock nut 7 with the central locking element or central locking lever 8 via a tooth connection 9 meshes. Consequently, the central locking lever 8 via the external locking or the lock nut 7 can be removed or removed at any time and regardless of position lock because he (the central locking lever 8) constantly in active connection with the lock nut 7 via the Tooth connection 9 is.

Next to it is a central locking drive 10a, 10b, 11 shown with motor 10a and output shaft 10b, which via an output disk 11 with an eccentric control pin 12 works on the central locking element 8. A Control of the motor 10a or the central locking drive 10a, 10b, 11 leads to the control pin 12 describes a circulation sheet, which iw Fig. 1 by a Double arrow is indicated. In this way, the Control pin 12 in fork seats 13, 14 of the central locking lever 8 a. With these fork mounts 13, 14 it is a first fork receptacle 13 and second fork receptacle 14, both on a common Circular arc R of a circular arc segment 8a of the central locking lever 8 are arranged. This common Circular arc R is shown in broken lines in Fig. 1.

a) verriegeln,

b) entriegeln (von "verriegelt" aus),

c) diebstahlsichern und

d) entriegeln (von "diebstahlgesichert" aus).

With the help of the two fork receptacles 13, 14, a total of four control surfaces for the control pin 12 can be represented, which are designated by a), b), c) and d). The aforementioned control surfaces a) to d) correspond to the following control commands to be executed:

a) lock,

b) unlock (from "locked"),

c) theft-proof and

d) unlock (from "theft-proof").

In any case, both fork mounts 13, 14 protrude at least partly in the indicated circular arc of the control pin 12, so that the aforementioned four control surfaces a) to d) in the manner described by means of the control pin 12 can be applied accordingly.

Overall, this ensures that the central locking element or the central locking lever 8 the Positions "unlocked", "locked" and "theft-proof" takes, as in Fig. 2 based on the detail can be seen particularly well. The same applies to a central locking pin arranged on the central locking element 15, which in the aforementioned pictorial Illustration is drawn enlarged and one Zäpfenkreisbogen Z1 describes about an axis 20. The left corresponds to the outer position of the central locking pin 15 the position "unlocked" ENT while the right outer position to the position "theft-proof" DS corresponds. The central position of the central locking pin 15 in contrast represents the "locked" Condition VER. So the above positions of the central locking pin 15 and thus the central locking lever 8 are taken precisely End stops provided in the housing According to the embodiment the central locking lever 8 has a catch 16, which with a locking counter element 17 on or in the housing for appropriate fixing of the central locking lever 8 interacts.

Finally, there is an unlocking contour 18 and a locking contour 19 on the inner locking lever 5, which in the manner described below and Attack the way on the central locking pin 15. The Unlocking contour 18 and the locking contour 19 also describe arcs, so-called contour arcs K1, K2, specifically around an axis 21 (see FIG. 2). Spigot arc Z1 and respective contour arc K1, K2 differ for unlocking or locking (i.e. in Position ENT or VER of the central locking pin 15), while in the anti-theft position DS the contour arcs K1, K2 at a distance from the aforementioned pin 15 run.

The way it works is as follows. 1 is the Motor vehicle door lock in the "locked" position shown. As already described, can be done with the help the external locking via the lock nut 7 a position-independent unlocking (and also a setting of the state "secured against theft"). Regardless of this, the central locking lever can of course 8 with the central locking drive 10 with Control pin 12 the aforementioned functional positions a) to d) take when the control pin 12 on his Circulation sheet abuts against the corresponding control surfaces.

In general, this control pin 12 of the driven pulley 11 after each actuation in the shown in Fig. 1 Starting position stopped. This stopping can for example accomplished by a switch, not shown be, which with the driven pulley 11th interacts. In any case, the control pin 12 engages starting from the starting position shown in Fig. 1 about half a turn depending on the direction of rotation (of the reversibly operated motor 10a) in the Fork 13 or fork 14 and runs against one of the Control surfaces, for example on the one hand c) or b), on the other hand a) or d). This will make the central locking lever 8 to take the relevant functional positions pivoted.

In order to enable unlocking and locking via the inner door handle 3, the axes 20 and 21, on the one hand of the central locking lever 8 and on the other hand of the inner locking lever 5, are arranged axially parallel to one another. Furthermore, the two aforementioned levers 8, 5 are placed in different planes with an overlap with one another, as can be seen in FIG. 1. According to the embodiment, the inner locking lever 5 is above the central locking lever 8, although an inverted arrangement is also possible. In any case, actuation of the inner door handle 3 via the actuating rod 4 leads to the fact that the inner locking lever 5 - starting in the locking position shown in FIG. 1 - is pivoted counterclockwise in the direction of unlocking or opening, as is indicated by the dashed position of the pin 6. This first actuation of the inner door handle 3 corresponds to an idle stroke or idle travel of the lock mechanism shown in FIG. 3. In contrast, the unlocking contour 18 initially sweeps a free path F ₁ with respect to the central locking pin 15. Following the sweep of the free path F ₁ , the unlocking contour 18 drives the central locking pin 15, so that the central locking element 8, possibly supported by the latching receptacle 16 or the latching counter element 17, assumes the ENT position.

It is different with the second stroke of the inside door handle 3. Because now the inner locking lever 5 leads as it were Free travel out because the central locking pin 15 in the position ENT and thus outside the contour arc K2 or outside the actuation angle of the unlocking contour 18 is located. The lock mechanism according to FIG. 3, which is also in the ENT position triggered so that the lock is opened.

For locking in the direction VER, only a single stroke of the inner door handle 3 is carried out, namely the locking stroke. In this context, the locking contour 19 drives the central locking pin 15 from its ENT position to the VER position. A free path F ₂ is again covered. There is no counterpart to the opening stroke because the door is closed by the vehicle user who slams the door shut.

As a result of the free path F ₁ between the unlocking contour 18 and the central locking pin 15 in its position VER, it is ensured that the central locking pin 15 does not abut the unlocking contour 18 when the central locking element 8 and thus the central locking pin 15 is pivoted into the position DS.

In the event that the motor vehicle door lock shown in position "anti-theft on", DS, or "theft-proof", neither the unlocking still locking contour 18, 19 on the central locking pin 15 attack, so that the central locking pin 15 outside the scope of the two aforementioned contours 18, 19 of the inner locking lever 5 and therefore not in alignment with the contour arcs K1 and K2 is located. Hence are in this position Interior locking lever 5 and central locking lever 8 decouples so that - even with the window pane broken - An associated motor vehicle door is not opened can be.

Claims (13)

1. A vehicle door lock, with

   rotary latch (1) and locking pawl (2), further with

   an operating lever system (3, 4) and a locking lever system (5), and with

   a central locking drive (10a, 10b, 11) for a central locking element (8),

      whereby the central locking drive (10a, 10b, 11) has at least one eccentric steering pin (12), which describes a peripheral arc and thereby engages in a steering fashion in at least a first fork-like seating (13) of the central locking element (8) in order to produce the functional positions "unlocked" and "locked", and
      whereby the steering pin (12) can additionally be steered into a functional position "theft-secured",
      characterised in that
      the central locking element (8) has, in addition to the first fork-like seating (13), at least one further second fork-like seating (14), whereby both fork-like seatings (13, 14) project at least partially into the peripheral arc of the steering pin (12).
2. The vehicle door lock according to claim 1, characterised in that the two fork-like seatings (13, 14) are arranged on a common arc of circle (R) of a circular-arc segment (8a) of the central locking element (8).
3. The vehicle door lock according to claim 1 or 2, characterised in that the two fork-like seatings (13, 14) have four steering faces (a, b, c and d) .
4. The vehicle door lock according to any one of claims 1 to 3, characterised in that the central locking element (8) has a central locking pin (15), which together with the central locking element (8) assumes the positions "unlocked", "locked" and "theft-secured".
5. The vehicle door lock according to any one of claims 1 to 4, characterised in that the central locking element (8) is fixed in the three positions "unlocked", "locked" and "theft-secured" by end stops in the housing and/or by notches (16, 17).
6. The vehicle door lock according to any one of claims 1 to 5, characterised in that the locking lever system (5) has an interior locking lever (5) in an active connection with the central locking element (8) in the positions "unlocked", "locked" and "theft-secured".
7. The vehicle door lock according to any one of claims 1 to 6, characterised in that the interior locking lever (5) has an unlocking contour (18) and a locking contour (19), whereby the unlocking counter (18) acts on the central locking pin (5) for the unlocking and the locking contour (19) acts on the central locking pin (15) for the locking.
8. The vehicle door lock according to any one of claims 1 to 7, characterised in that the unlocking contour (18) and the locking contour (19) describe, in the presence of swivelling motions of the interior locking lever (5), in each case a contour circular arc (K1, K2) about an axis (21) of the interior locking lever (5) .
9. The vehicle door lock according to any one of claims 1 to 8, characterised in that the central locking pin (15) describes a pin circular arc (Z1) in the presence of swivelling motions of the central locking element (8) about its axis (20), whereby respective contour circular arc (K1, K2) and pin circular arc (Z1) intersect one another for the unlocking and locking, whilst the contour circular arcs (K1, K2) run into position "theft-secured" at a distance from the central locking pin (15).
10. The vehicle door lock according to any one of claims 1 to 9, characterised in that the axis (20) of the central locking element (8) and the axis (21) of the interior locking lever (5) are arranged parallel to one another, whereby central locking element (8) and interior locking lever (5) lie in different planes and partially overlap one another.
11. The vehicle door lock according to any one of claims 1 to 10, characterised in that the interior locking lever (5), after each operation, assumes its rest position again in a spring-supported manner.
12. The vehicle door lock according to any one of claims 1 to 11, characterised in that the interior locking lever (5) is affixed to an interior door handle (3) by means of an operating rod (4) or an operating Bowden cable.
13. The vehicle door lock according to any one of claims 1 to 12, characterised in that unlocking or locking of the vehicle door lock requires a double operation of the interior door handle (3).

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