Motor vehicle lock

Abstract

The invention relates to a lock (1) for a motor vehicle, in particular a side door lock, comprising a locking mechanism (7), a triggering lever (6), an actuating lever (2) and a coupling lever (3), wherein the triggering lever (6) can be coupled to the actuating lever (2) by means of the coupling lever (3), and a means for controlling the coupling lever (3), wherein the coupling lever (3) can be guided by means of a control cam (11).

Claims

1. A lock for a side door lock of a motor vehicle, the lock comprising: a locking mechanism; a triggering lever engageable with the locking mechanism; an actuating lever; a coupling lever pivotably accommodated in the actuating lever; a control lever configured to guide the coupling lever; and a mass inertia lever having a control contour for guiding the control lever, wherein the triggering lever is coupled to the actuating lever by the coupling lever, wherein the coupling lever is guided by a control cam of the control lever, and wherein the control lever has an extension configured to disengage the coupling lever from the triggering lever during an excessive speed of the actuating lever.

2. The lock for a motor vehicle according to claim 1, wherein the control lever is accommodated relative to the actuating lever on a joint axis.

3. The lock according to claim 1, wherein the extension is electrically operated.

4. The lock for a motor vehicle according to claim 1, wherein at least one section of the coupling lever protrudes into an aperture of the actuating lever and is guided into the aperture.

5. The lock for a motor vehicle according to claim 1, wherein the actuating lever, the control lever and the triggering lever are accommodated on a joint axis and/or a guide.

Description

BRIEF DESCRIPTION OF DRAWINGS

(1) The following are shown:

(2) FIG. 1 a front view on a section of a lock of a motor vehicle with crucial components to explain the invention. The front view shows the functional unit in a starting position, i.e. in the unoperated state,

(3) FIG. 2 the rear view of the functional unit according to FIG. 1 in the unoperated state, i.e. a starting position,

(4) FIG. 3 a front view on the functional unit of the lock during normal operation of the actuating lever to trigger the locking mechanism, and

(5) FIG. 4 a front view of the functional unit with greatly accelerated movement of the actuating lever, in which the mass inertia element prevents triggering of the locking mechanism.

DETAILED DESCRIPTION

(6) A front view on a lock 1 of a motor vehicle is reproduced in FIG. 1. The lock is only indicated as a broken line. The lock 1 encompasses an actuating lever 2, a coupling lever 3, a control lever 4, a mass inertia lever 5, a triggering lever 6 and a locking mechanism 7. The locking mechanism 7 only indicated in dashes can consist of a pawl 7, for example, onto which the triggering lever 6 directly engages. The further component of the lock 1 is dispensed with for the sake of clarity, so that only the crucial components of the lock 1 are reproduced to explain the function of the invention.

(7) FIG. 1 shows the functional unit 8 of the lock 1 in an unoperated state. In order to operate the actuating lever 2, the actuating lever is operated, for example, by means of a Bowden cable in the direction of the arrow P1 in a clockwise direction. During operation of the actuating lever 2 the coupling lever accommodated in the actuating lever 2 is moved via its axis 9 accommodated in the actuating lever 2. The coupling lever 3 in turn has a tap 10 which is more clearly visible in FIG. 2, with which the coupling lever 3 engages into the control cam 11 of the control lever 54. The actuating lever 2 takes along the control lever 4 in operation of the actuating lever 2 in the direction of the arrow P1. A spring element 12 acts between the actuating lever 2 and the control lever 4. The spring element 12 holds the control lever 4 in its starting position so that the spring element acts with a relative force between the control lever 4 and the actuating lever 2 to a relative movement between the actuating lever 2 and the control lever 4. The spring force of the spring element, which can be a spiral spring in particular, must be overcome in order to create a relative movement between the actuating lever 2 and the control lever 4.

(8) If the pin 10 of the coupling lever 3 interacts with the control lever 4, the control lever 4 in turn thus interacts with the mass inertia lever 5 by means of a guide pin 13. For this purpose, the guide pin 13 engages into a control cam 14 of the mass inertia lever 5. As is clearly apparent in FIG. 2, the guide pin 13 can be guided radially externally in the control cam. The mass inertia lever 5 is accommodated pivotably in the lock 1 around its axis 15. The mass inertia lever 5 preferably has a mass distribution which is in equilibrium in relation to the axis 15. In other words, the mass inertia lever 5 is offset in mass around the axis 15. An offset mass balance in relation to the axis 15 offers the advantage that no natural oscillations can arise due to vibrations in the motor vehicle or can be largely prevented.

(9) During operation of the actuating lever 2 the coupling lever 3 is consequently operated and where the actuating lever is operated with normal speed, the control lever 4 follows the movement of the actuating lever 2. The consequence of this is that the coupling lever 3 maintains its orientation in the functional unit 8. A radial end 16 of the coupling lever 3 then engages with a stop edge 17 of the triggering lever 6. Such an engagement between the radial end 16 of the coupling lever 3 and the stop edge 17 is reproduced as a normal operation of the lock in FIG. 3. During operation of the triggering lever 6, as illustrated in FIG. 3, the triggering lever 6 executes a movement in the direction of the arrow P2, wherein a triggering arm 18 engages with the pawl 7, for example. The pawl 7 is then moved in the direction of the arrow P3 so that the locking mechanism can be unlocked.

(10) The case is now illustrated in FIG. 4 in which the actuating lever 2 is rotated with excess speed in the direction of the arrow P1 around the axis 9a in a clockwise direction. Excess speed which leads to excessively quick movement of the actuating lever 2 above a limit speed leads, on the one hand, to the spring element 12 being deflectable and simultaneously that the mass inertia element cannot follow the accelerated movement of the actuating lever 2. The coupling lever 3 is accommodated in the actuating lever 2 and must follow the movement of the actuating lever 2. However, as the control lever 4 remains in its starting position, the pin 10 of the coupling lever 3 is guided in the control cam 11 of the control lever 4. The coupling lever 3 thus pivots in FIG. 4 in an anti-clockwise direction and disengages with the triggering lever 6. As is clearly apparent in FIG. 4, the radial end 16 of the coupling lever 3 disengages with the stop edge 17 of the triggering lever 6. The triggering lever 6 remains in its starting position so that the triggering arm 18 cannot be brought into contact with the locking mechanism 7. In this movement, a section 3a of the coupling lever 3 protrudes in the aperture 19 of the actuating lever 2 and also moves in the aperture 19 of the actuating lever 2.

(11) In order to disengage the coupling lever 3 with the triggering lever 6, the control lever 4 furthermore has an engagement means 20 which is formed as an extension 20 in this embodiment. If a non-illustrated lever is engaged with the extension 20 in the lock 1, for example, wherein the non-illustrated lever exerts a force F on the extension 20, the control lever 4 thus also remains in its starting position. The remaining of the control lever 4 in its starting position causes the coupling lever 3 to be guided in the control cam 11 of the control lever 4 during operation of the actuating lever 2 and thus the coupling lever 3 disengages with the triggering lever 6. The lock 1 can thus be bolted.

(12) As is clearly apparent in the exemplary embodiment, a multitude of advantages are attained by the exemplary embodiment, whereby only the least possible spatial requirements are necessary, whereby the highest level of security can be attained by the construction, in particular the insertion of a control cam into the control lever.

LIST OF REFERENCE SYMBOLS

(13) 1 Lock 2 Actuating lever 3 Coupling lever 4 Control lever 5 Mass inertia lever 6 Triggering lever 7 Locking mechanism, pawl 8 Functional unit 9 Axis 10 Pin 11 Control cam 12 Spring element 13 Guide pin 14 Control cam 15 Axis 16 Radial end 17 Stop edge 18 Triggering arm 19 Aperture 20 Engagement means, extension P1, P2, P3, P4 Arrow F Force