Abstract
The invention relates to a motor vehicle lock (1) comprising a locking mechanism that includes a rotary latch (2), at least one pawl (3), a triggering lever (4) that allows the pawl (3) to disengage from the rotary latch (2), and a latching lever function that allows the triggering lever (4) which is actuated for disengaging the rotary latch (2) to be secured in an actuated position; the triggering lever can be guided by the rotary latch (2) only in some sections.
Claims
1. A motor vehicle latch comprising a locking mechanism with a catch and a pawl, and a triggering lever, wherein the triggering lever causes the pawl to be disengaged from the catch, thereby causing the catch to be in an open position, wherein the motor vehicle latch has a storage lever function whereby after the triggering lever is activated to an activated position to disengage the pawl from the catch, the triggering lever is fixed in the activated position, wherein the catch is movable from the open position to a pre-ratchet position and from the pre-ratchet position to a main ratchet position, the catch being configured to move the triggering lever only during movement of the catch from the open position to a pre-ratchet position to prevent the catch from moving the triggering lever into an undefined position, the triggering lever being held in a same position during movement of the catch from the pre-ratchet position to the main ratchet position, the pawl being movable by the catch during movement of the catch from the open position to the pre-ratchet position and during movement of the catch from the pre-ratchet position to the main catch position.
2. The motor vehicle latch according to claim 1, wherein the pawl lies adjacent to the catch in an opening state of the motor vehicle latch corresponding to the open position of the catch.
3. The motor vehicle latch according to claim 1, wherein the catch has a pre-ratchet portion and a main ratchet portion, and the pawl and the triggering lever are movable from corresponding opening positions, in which the pawl is disengaged from the catch, to corresponding pre-ratchet positions by the catch.
4. The motor vehicle latch according to claim 1, wherein the pawl is movable into a main ratchet position by the catch, and the triggering lever is held in the same position corresponding to a pre-ratchet position of the pawl.
5. The motor vehicle latch according to claim 1, wherein the pawl has an extension, whereby at least a switching means is switched by the extension.
6. The motor vehicle latch according to claim 1, wherein the triggering lever has a tappet contour, and the pawl is deflected by the tappet contour to cause the pawl to be disengaged from the catch.
7. The motor vehicle latch according to claim 1, wherein the pawl and the triggering lever have a common pivoting axis.
8. The motor vehicle latch according to claim 1, wherein the triggering lever is deflected by an electrical drive including an electrically activated control contour.
9. The motor vehicle latch according to claim 1, wherein the pawl at least partly comprises metal and plastic.
10. The motor vehicle latch according to claim 1, wherein the triggering lever is made of plastic.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
(1) The following are shown:
(2) FIG. 1 a top view on a motor vehicle latch, in particular a tailgate latch without a housing lid, whereby the locking mechanism is illustrated in an opening position of the catch,
(3) FIG. 2 corresponds to the motor vehicle latch according to FIG. 1, whereby the pre-ratchet position of the catch is reproduced here,
(4) FIG. 3 The motor vehicle latch branches in turn according to FIGS. 1 and 2, whereby the catch is illustrated in the position shortly before the pawl engages into the main ratchet position, and
(5) FIG. 4 the motor vehicle latch according to FIGS. 1 and 3, whereby the latch is reproduced in a main ratchet position of the pawl and thus in a closed state of the tailgate.
DETAILED DESCRIPTION
(6) FIG. 1 reproduces a motor vehicle latch 1 and in particular a tailgate latch 1, in a top view and without a latch lid. The motor vehicle latch 1 has a catch 2, a pawl 3, a triggering lever 4 and an electrical drive 5. The following are furthermore apparent.
(7) Switching means 6, 7, a latch housing 8 and a gearwheel 9 with a control contour 10. A wormgear 11 is arranged between the electrical drive 5, which is preferably an electromotor and the gearwheel 9, so that the gearwheel 9 can be electrically activated.
(8) The open position of the catch 2 is reproduced in FIG. 1. By means of closure of a door or flap, the motor vehicle latch 1 is moved against a non-illustrated latch holder so that the catch accomplishes a movement in the direction of the arrow P in a counterclockwise direction. In the opening position, the pawl 3 is adjacent on the adjacency contour 12 of the catch. The pawl 3 preferably lies adjacent in a spring pre-tensioned manner against the catch 2, whereby the pawl 3 is accommodated around the axis 13 in a pivotable manner in the latch housing 8. The triggering lever 4 is also pivotably accommodated around the axis 13 in this exemplary embodiment and also lies adjacent on a contour of the catch 2. The adjacency contour of the triggering lever 4 on the catch 2 is located in the view illustrated in FIG. 1 behind the catch 2. The triggering lever 4 is also adjacent against the catch 2 in a spring pre-tensioned manner.
(9) In FIG. 2, the motor vehicle latch 1 according to FIG. 1 is reproduced, whereby the catch 2 was pivoted in the direction of the arrow P in a counterclockwise direction and the pawl 3 engaged into a pre-ratchet 14 of the catch 2. The pawl 3 and the triggering lever 4 are conducted via a catch contour 15 on the catch 2 into the pre-ratchet positions illustrated in FIG. 2. It must be recorded that only the catch contour 15 is visible in FIG. 2 to conduct the pawl 3. An extension 16 is formed on the catch 3 which engages with the switching means 6 which can be a microswitch in particular. The switching means 6 can thus detect whether the catch 2 has engaged with the pawl 3. It can thus be detected by means of the extension 16 whether the locking mechanism is in a ratchet position. The pawl 3 and the triggering lever 4 have been pivoted in FIG. 2 in a clockwise direction around the axis 13. The triggering lever 4 engages with the control contour 10 of the gearwheel 9.
(10) In FIG. 3, the motor vehicle latch 1 is reproduced in turn, whereby the catch 2 was pivoted in turn in the direction of the arrow P and the pawl 3 is conducted by means of the catch contour 17. The extension 16 is connected to the pawl 3 in a torque-proof manner so that the extension 16 is reproduced lifted from the switching means 6. As is also apparent from FIG. 3, the triggering lever 4 continues to lie adjacent on the control contour 10 of the gearwheel 9 and remains in its position which thus corresponds to the pre-ratchet position. Due to the partial conducting of the triggering lever 4 during closure or the rotational movement of the catch in the direction of the arrow P the triggering lever 4 is not further acted on with an impulse or moment by the catch 2. It is hereby ensured that the triggering lever 4 is not unduly greatly accelerated by excessively quick movement of the catch 2 and is possibly moved into a position which corresponds to the snow load function. The snow load lever 18 is also apparent in FIG. 3, whereby the snow load lever 18 engages with an end area 19 of the triggering lever 4 in the case of the snow load function. Independent conducting by means of the catch 2 is enabled by the separation of the pawl 3 and the triggering lever 4. In particular, by means of excessively rapid activation of the catch 2 only the pawl 3 can be accelerated after attainment of the pre-ratchet position, whereby the pivoting movement of the pawl is limited by the buffer 20 in the clockwise direction. Engagement of the snow load function during closure of the catch 2 is thus effectively prevented.
(11) In FIG. 4 the motor vehicle latch 1 is reproduced in turn according to FIGS. 1 to 3. The closure position of the motor vehicle latch 1 is illustrated in which the catch 2 is located in a main ratchet position. The main ratchet 21 engages with the pawl 3. In turn, the extension 16 acts on the switching means 6, so that the position of the pawl 3 can be detected by means of the switching means 6. In addition, the catch 2 engages with the switching means 7 in the area of the adjacency contour 12, whereby a clear signal can be detected with which the closure state is electronically detected according to FIG. 4.
(12) During closure of the motor vehicle latch 1 from the opening position according to FIG. 1 into the closure position according to FIG. 4 according to the invention the pawl 3 is led completely by means of the adjacency contour 12 and the catch contour 15, 17 until the pawl 3 engages into the main ratchet 21. The triggering lever 4 is only conducted partly along a contour which is not visible in FIGS. 1 to 4 from the opening position of the catch 2 into a pre-ratchet position. This ensures that the triggering lever 4 is not excessively accelerated and engages into the snow load lever 18. The triggering lever 4 lies adjacent during movement of the catch 2 from the pre-ratchet position into the main ratchet position on the control contour 10.
(13) To open the locking mechanism the electrical drive 5 is activated, whereby the wormgear 11 is driven and the gearwheel 9 is moved. The gearwheel 9 is preferably moved in a counterclockwise direction so that the triggering lever 4 is moved and deflected along the control contour 10 namely deflected in a clockwise direction in such a way until the triggering lever 4 reaches the end position buffer 20, whereby on the one hand the end area 19 of the triggering lever 4 engages with the snow load lever 18 and whereby the pawl 3 is pivoted by means of the tappet 22 of the triggering lever 4 so far in a clockwise direction that the pawl 3 disengages with the catch 3. The catch 2 is released and can be moved into the opening position according to FIG. 1 in a spring-stressed manner and/or by means of the sealing pressure which acts on the motor vehicle latch 1.
LIST OF REFERENCE SYMBOLS
(14) 1 Motor vehicle latch, tailgate latch 2 Catch 3 Pawl 4 Triggering lever 5 Electrical drive 6, 7 Switching means 8 Latch housing 9 Gearwheel 10 Control contour 11 Worm gear 12 Adjacency contour 13 Axis 14 Pre-ratchet 15, 17 Catch contour 16 Extension 18 Snow load lever 19 End area 20 End position buffer 21 Main ratchet 22 Tappet P Arrow
