Rotary latch closure

Abstract

Rotary latch (1) with a rotary latch (2) and a pawl (3), wherein the pawl (3) can be moved from a locking position holding the rotary latch (2) in a closed position to a release position by actuating a trigger (4), in which the rotary latch (2) can rotate into an open position driven by a force, in particular spring force, wherein the rotary latch (2) passes a pre-detent position when moving back from its open position to its closed position, in which the pawl (3) engages a pre-detent stage of the rotary latch (2), wherein a storage means is provided to hold the pawl (3) in its release position when the rotary latch (2) rotates from its closed position beyond passing the pre-detent position, characterized in that the storage means comprises a support section (24) associated with the trigger (4),which, when the trigger (4) is activated, moves in front of a storage stage (18) of the rotary latch (2) to reach the storage position and leaves it again after passing the pre-detent position.

Description

The invention relates to a rotary latch closure having a rotary latch and a pawl, wherein the pawl can be displaced by actuating a trigger from a pawl holding a rotary latch in a closed position into a release position in which the rotary latch can rotate driven by a force, in particular a spring force, into an open position, wherein the rotary latch, upon rearward displacement from its open position into its closed position, passes a pre-ratchet position in which the pawl precedes a pre-ratchet stage of the rotary latch, wherein a storage means is provided in order to hold the pawl in its release position when the rotary latch is rotated from its closed position until beyond a pass of the pre-ratchet position.DE 103 44 244 B4 describes a rotary latch lock with a worm mounted on a shaft rotatable by a drive motor, which worm displaces a pawl from a locking position into a release position as a trigger when the shaft is rotated. A pivot lever which holds the worm in its position holding the pawl is displaced during pivoting open of the rotary latch in such a way that the worm can be displaced back on the shaft.DE 199 02 561 A1 discloses a rotary latch lock in which a pawl can only be displaced from a blocking position into a release position if a blocking member has previously been moved from a blocking position into a reading position.DE 10 2005 015 515 A1 describes a rotary latch lock in which the pawl is held in a storage position by a leaf spring.A further rotary latch closure is known from DE 199 30 339 A1. The rotary latch closure consists of a rotary latch, a pawl, a release lever and a storage lever. When the release lever is triggered, the storage lever is displaced by a torsion torsion leg spring into a storage position. In this storage position, the storage lever holds the trigger in a release position. Furthermore, the release lever also holds the pawl in a release position. The storage lever abuts the circumferential contour of the rotary latch. If the rotary latch is now pivoted completely in the opening direction, it displaces the storage lever out of the storage position. For this purpose, the rotary latch has a cam. Only after complete displacement of the rotary latch in the opening direction can the rotary latch closure be closed again.The object of the invention is to improve a rotary latch closure of the generic type in terms of closing technology.The object is achieved by rotary latch closures having the features of claim 1 and also by rotary latch closures having in each case the features of dependent claims 17, 18 and 19.The invention is further developed by the features of the dependent claims.Claim 1 provides first and substantially that the storage means comprises a support section assigned to the trigger, which, when the trigger is actuated to reach the storage position, passes in front of a storage stage of the rotary latch and leaves it again after passing the pre-ratchet position.Preferably, the support portion is a tongue of the trigger. The storage stage is formed by a wide-side rib of the rotary latch. After leaving the storage rib, the support section abuts against a blocking rib. During a closing movement of the rotary latch from its open position into its closed position, the support section will slide along the blocking rib and, as a result of a transverse control, will be controlled past the storage rib. The support section is guided over the storage rib in a flank-controlled manner. The storage rib and / or the blocking rib run concentrically to the axis of rotation of the rotary latch. The pawl and the trigger are mounted on a housing of the rotary latch lock such that they can be pivoted about the same axis. These are spring-biased independently of one another in the direction of the rotary latch. The trigger is made of plastic and the pawl is made of steel. The pawl lies in a pocket of the trigger, wherein an extended pocket wall forms the tongue forming the support section. The pawl and the trigger can, however, also be designed as levers lying one above the other. According to a further development of the invention, the support section can also be formed by a pivot lever. It is in particular the end face of the pivot lever which can be supported on the storage rib or on the blocking rib. The pivot lever is mounted about a pivot axis which is fixedly connected to the trigger formed by a lever. The pivot lever is seated on the trigger in a spring-biased manner. In the closed position of the closure, the pivot lever is supported on a section of the blocking rib. It is preferably supported with a marginal edge of the end face. In this pivoted position, the locking extension of the locking pawl lies in the latching cutout of the rotary latch. If the trigger is pivoted, the portion of the pivot lever that bears against the blocking rib slides past the latter. In this case, the pivot position of the pivot lever relative to the trigger changes. This takes place as a result of the force of a spring acting on the pivot lever. The pivot lever can pivot as far as an end stop position. It abuts against a stop provided on the trigger lever. In this stop position, it forms an over-center position and can be supported with its end face on the storage rib. The rotary latch can be displaced in the opening direction. In this case, the release held in the pivoted position as a result of the pivoted lever supported on the blocking rib holds the pawl in a release position. When the rotary latch is rotated, the end face of the pivot lever slides off the side face of the storage rib first. In this case, the end face of the pivot lever also overflows a radial step, with which the storage rib merges into the blocking rib. This takes place when the locking extension of the locking pawl has passed over the pre-ratchet stage of the rotary latch. When the rotary latch is pivoted from the open position into the closed position, this step ensures that the pivot lever is returned from its over-center position, which has the consequence that the pawl can again approach the rotary latch in order to enter the pre-ratchet position or the main ratchet position.Furthermore, the invention relates to a motor drive of the trigger, which displaces the trigger for displacing the pawl from the blocking position into the release position and, when the storage position is reached, releases the trigger for the rearward displacement in such a way that the pawl can also be displaced from the pre-latching position or a partial locking position by motor-driven forward displacement of the trigger into the release position. As a result of this development of the prior art, the lock can be opened from any operating position. If a two-ratchet lock is involved, the pawl can be displaced by motor not only from the pre-ratchet but also from any position between the pre-ratchet and the main ratchet from the locked position. The lock can also be opened from a partial locking position in which the pawl has only partially engaged under the main ratchet. In this respect, the invention also relates to snap-in locks.Preferably, the motor drive forms a helical drive rib. This engages in a drive recess of the trigger. By rotating the helical drive rib, the trigger can be advanced. An end face of the helical drive rib abuts against a blocking surface of the trigger after the trigger is advanced. A clearance angle exists between the two end faces of the drive rib. This forms a rearward displacement path for the trigger. The motor drive is preferably blocked in both rotational directions of the motor when the support section is supported on the blocking rib. A contact flank of the trigger is opposed by a counter-contact flank of the rotary latch. The contact flank is slightly spaced apart from the counter-contact flank when the support section is supported on the blocking rib. The contact flank is supported on the counter-contact flank when the support section is raised above the storage rib. The drive rib of the motor drive can engage in the drive recess of the release when the contact flank lies in contact with the counter-contact flank. The measure according to the invention is provided not only on a ratchet lock but also on a ratchet lock.An alternative to the invention described above relates to a rotary latch lock having a lock housing supporting a rotary latch and a pawl, wherein the rotary latch has a fork mouth formed by two walls spaced apart from one another, and wherein the pawl in a locking position holds the rotary latch in a closed position, in which closed position a counter-locking part held in the fork mouth bears against the first wall of the fork mouth pointing in an opening direction and can be displaced into a release position, in which the rotary latch can be rotated by the force of a rotary latch spring into an open position, in which the counter-locking part can emerge from the fork mouth of the rotary latch, wherein the rotary latch released after displacement of the pawl into the release position holds the pawl in the release position after leaving its closed position.Such a closure is described in DE 102005015515. The lock described therein has a lock housing which is formed by a base plate on which a rotary latch and a pawl are rotatably mounted. The rotary latch has a fork mouth with two walls extending substantially parallel to one another. In the closed position of the rotary latch, the fork mouth or the walls of the fork mouth run transversely to the direction of extent of a capture slot for the counter-locking part formed by a striker. The extending direction of the one trapping slot defines an opening direction. The striker has a circular cross section, wherein the diameter of the striker substantially corresponds to the clear distance of the two walls, so that the striker is virtually rattle-free, but in any case is captive in the fork mouth with minimal play. The pawl, which is rotatable about an axis of rotation, is located in its locked position with a locking edge before a latching step of the rotary latch. If the pawl is displaced from the blocking position into a release position, the blocking edge moves from the latching step, so that the rotary latch can freely rotate in its open position. This is supported by a rotary latch spring. As soon as the rotary latch moves slightly from the closed position in the direction of the open position, a section of the rotary latch wall passes in front of a section of the pawl located in the release position, so that the pawl is prevented from pivoting back into the locking position until the rotary latch again assumes its closed position. In order to prevent the pawl from pivoting from the blocking position into the release position again when the counter-locking part is held in position, wherein the rotary latch would then be prevented from being displaced from its closed position into its open position, the solution described there provides a storage element that, when the pawl is pivoted into the release position, a supporting step of the pawl engages under it in order thus to hold the pawl in the release position, even if the counter-locking part is held in position.The invention is based on the further object of simplifying the closure described above.The object is achieved by rotary latch closures having the features of claim 1 and also by rotary latch closures having in each case the features of dependent claims 17, 18 and 19.The invention is further developed by the features of the dependent claims.It is firstly and substantially provided that the counter-locking part which bears against the first wall in the closed position is at a distance from the second wall of the fork mouth which lies opposite the first wall of the fork mouth which is sufficiently large that, when the counter-locking part is held in position, the released rotary latch pivots as far as into the rotary position which holds the pawl in the release position. The counter-locking part, which can also be a striker, is located in the mouth of the rotary latch with sufficient movement clearance for the rotary latch. If the pawl is displaced from its blocking position into the release position, the rotary latch is released. Regardless of whether the counter-closing part is held in position by other external forces, the rotary latch can pivot by a certain amount in the opening direction. The rotary latch can pivot at least until its second wall of the fork mouth abuts the counter-closing part. This pivoting movement is sufficient to displace a storage section of the rotary latch into the pivoting range of the pawl, so that the pawl spring thereof cannot be pivoted back into the blocking position, but rather rests on a storage stage of the rotary latch. If the external conditions which hold the counter-closing part in position are now eliminated, the closure can be opened. The closure is in particular suitable for detachably connecting backrests to the vehicle body, so that the backrest can be pivoted when the closure is released. The closure is also suitable for keeping case lids, flaps or doors of a motor vehicle closed. In case of case lids, loads resting on the case lid, in particular snow loads, can result in the force of the rotary latch spring not being sufficient to displace the mating closure part. The mating closure member is then held in position by gravity. However, as a result of the free movement of the rotary latch, the latter can nevertheless pivot after releasing the pawl into a position from which it can pivot into the fully open position even when the release actuation of the pawl is canceled. In a preferred development of the invention, it is provided that the counter-locking part is acted upon by a spring assigned to the lock housing. This spring urges the counter-closing part in the opening direction and causes the counter-closing part to bear against the first wall of the fork mouth facing in the opening direction in the closed position of the rotary latch. The force of this spring does not necessarily have to be overcome when closing the closure. This spring merely provides the force to maintain the mating closure member in a position in which it is spaced from the second wall of the fork mouth and abuts the first wall of the fork mouth. When closing the closure, which is arranged, for example, on a door, a flap or a backrest, further forces must generally be overcome, for example the forces required for compressing a rubber seal. Furthermore, when closing the closure, the counterforce of the rotary latch spring must be overcome, which is tensioned during the return pivoting movement of the rotary latch from its open position into its closed position. During this forced rotational displacement of the rotary latch, the second wall of the fork mouth of the rotary latch is acted upon by the counter-closing part. This then has the consequence that the counter-locking part has to be displaced beyond the normal closed position so that the rotary latch is pivoted into a pivoted position in which the pawl can pivot from its release position into its locked position. In closures in which this overstroke is required, the spring acting on the counter-closure part is designed such that it can yield at least by the amount of the distance when the closure is closed. The distance which the counter-closing part has in its contact position of a first wall with the second wall of the fork mouth lies approximately in the range between half and one millimeter. The spring acting on the mating closure part can be a leaf spring which crosses the capture slot for the mating closure part. The spring can, however, also be formed by a slide and in particular a wedge slide arrangement which is displaced during the opening movement in such a way that only a small spring force has to be overcome when closing the rotary latch in order to achieve the overstroke. Only when the rotary latch is held in its closed position by the pawl does the slide arrangement act to hold the counter-locking part on the first wall by means of a wedge.Exemplary embodiments of the inventions discussed above are explained below with reference to exemplary embodiments. The following are shown: FIG. 1 shows a simplified perspective illustration of the rotary latch closure in the open position, FIG. 2 is a plan view according to the viewing direction II from FIG. 1 with a lock housing shown schematically, FIG. 3 is a side view according to the viewing direction III from FIG. 2, FIG. 4 shows an intermediate position shortly before the pawl enters the pre-ratchet position, FIG. 5 is a sequential view of FIG. 4, but here the rotary latch is held in a pre-ratchet position, FIG. 6 is a sequential view of FIG. 5, with the rotary latch held in the closed position, FIG. 7 is a view similar to FIG. 2, but here the trigger is held in a release position, so that the rotary latch is in an open position, FIG. 8 shows the rotary latch between a closed position and an open position, as a result of which the trigger is held in a storage position, FIG. 9 shows an intermediate position, wherein the rotary latch can be displaced either into the open position (FIG. 2 ) or into the pre-ratchet position (FIG. 5 ) and into the closed position (FIG. 6 ), FIG. 10 shows the schematic illustration of a further exemplary embodiment of a rotary latch closure in a closed position, FIG. 11 is a view of the closure shown in FIG. 10 during closing, FIG. 12 shows an illustration of the closure according to FIG. 10 after the pivoting of the pawl into its release position, wherein the closing member is held in a position corresponding to the closed position, FIG. 13 shows a representation according to FIG. 10 of a further exemplary embodiment, FIG. 14 shows a representation according to FIG. 11 of the exemplary embodiment shown in FIG. 13, FIG. 15 shows a further exemplary embodiment of the invention in the closed position, FIG. 16 shows the exemplary embodiment according to FIG. 15 with the pawl pivoted into the storage position, FIG. 17 is a sequential view of FIG. 16, in which the rotary latch has reached its open position, FIG. 18 shows a further subsequent illustration in which the rotary latch is rotated from the open position in the direction of its closed position, FIG. 19 is a further sequential view of FIG. 18, in which the rotary latch has been pivoted further in the direction of its closed position.The rotary latch closure 1 essentially consists of a rotary latch 2, a pawl 3, a trigger 4 and a motor drive 5. This is only schematically shown.The rotary latch 2 is arranged rotatably in the housing 6 about a rotation axis 7. Starting from FIG. 2, the rotary latch 2 forms a projection 8 on its left-hand side (facing away from the pawl). The projection 8 forms with its outer contour a stop 9. On the right side of the stop 9, the rotary latch forms a fork mouth 10. The fork mouth 10 can capture a U-shaped mating closure part 11. The counter-closing part 11 is only schematically shown. This is usually hinged to the body of a motor vehicle. The rotary latch latch closure 1 is mounted, for example, on a trunk lid of a passenger car. In the counterclockwise direction (closed position in the rotational direction), the rotary latch 2 forms two latching cutouts 12, 13. Above the latching cutout 13, the rotary latch 2 forms with its outer contour a counter-contact flank 14. Approximately in the middle between the counter-contact flank 14 and the axis of rotation 7, a point of articulation 15 for a spring 16 is arranged. The spring 16 is only schematically shown. The other end of the spring 16 is fixed to a fulcrum 17 of the trigger 4. Concentrically to the axis of rotation 7 of the rotary latch 2, the latter forms a storage stage 18. The storage stage 18 is formed by broad-side ribs. These are divided into a storage rib 19 and a blocking rib 20. The blocking rib 20 is offset approximately by the width of the storage rib 19 in the direction of the axis of rotation 7 of the rotary latch 2. The storage rib 19 forms an inclined flank 21 at its end section facing the blocking rib. This increases in the clockwise direction in the direction transverse to the plane of rotation.The housing 6 forms a capture opening 22 for the mating closure part 11. As can be seen in FIG. 2, the housing 6 forms with its inner surface of the left wall a counterstop 23 for the stop 9 of the rotary latch 2. The counterstop 23 delimits the rotary latch 2 in the opening direction.Starting from FIG. 2, the pawl 3 and the trigger 4 are arranged to the right next to the rotary latch 2. Both are mounted in the housing 6 so as to be pivotable about a common axis 41. The trigger 4 forms the storage means. The storage means is formed by a support section 24. The support section 24 is a tongue of the trigger 4; the articulation point 17 for the spring 16 is arranged on the support section 24. The support section 24 forms at its free end a sloping flank 25 corresponding to the sloping flank 21. This can be seen in FIG. 1. The inclined flank 25 can cooperate with the inclined flank 21 of the storage rib 19. The free end of the trigger 4 is angled and forms a drive recess 26. The drive recess 26 is approximately matched in shape to the shape of a helical drive rib 27 of the motor drive 5. Furthermore, the free end of the trigger 4 forms a blocking surface 28 for an end surface 29 of the drive rib 27.As can be seen from FIG. 3, the helical drive rib 27 does not run completely around the motor drive 5. This forms a clearance angle α. Clearance angle α is formed by end face 29 and by a further end face 30. As can be seen, for example, from FIG. 3, the free end of the trigger 4 is substantially matched in shape to the clearance angle α between the two end faces 29, 30. The clearance angle α forms a rearward displacement path for the trigger 4. This can be seen well in FIGS. 1 and 3. The upper elongated pocket wall 32 forms the tongue for the support portion 24. The spring 16, which is tensioned between the rotary latch 2 and the trigger 4, urges the rotary latch 2 in the opening direction and the trigger 4 in a blocking position. The trigger 4 is preferably made of plastic.The pawl 3 is located in the pocket 31. This can be seen, for example, in FIGS. 1 and 3. The pawl 3 is preferably made of steel. The pawl 3 forms a locking extension 33. This is substantially matched in shape to the shape of the two latching cutouts 12, 13. Furthermore, the pawl 3 forms an arm 34 running parallel to the trigger 4. On its left-hand broad side, the arm 34 forms a contact surface 35. The abutment surface 35 can abut against an abutment surface 36 of the trigger 4. The pawl 3 is also spring-loaded in the direction of the rotary latch 2. The spring 37 is schematically shown here only with one arrow. Thus, the pawl 3 and the trigger 4 are spring-loaded independently of each other in the direction of the rotary latch 2.Furthermore, the release 4 forms a contact flank 38. The contact flank 38 is arranged above the support section 24 and can bear against the counter-contact flank 14 of the rotary latch 2.The motor drive 5 consists of a shaft 39 which is surrounded by the helical drive rib 27. On the left side of the drive rib 27, the drive 5 forms a gearwheel 40. An electric motor, not shown here, can engage on the gearwheel 40 in order to actuate the motor drive 5. The motor drive 5 is accommodated in a positionally fixed manner in the housing 6.The mode of operation of the exemplary embodiment described above is explained in more detail in the following part:In FIGS. 1, 2 to 3, the rotary latch closure 1 is in the open position. In this case, the rotary latch 2 is pivoted to such an extent that the stop 9 bears against the counterstop 23 of the housing 6. The motorized drive 5 is in the basic position. The trigger 4 is pivoted in the direction of the rotary latch 2 by the force of the spring 16 to such an extent that the support section 24 is supported on the blocking rib 20 of the rotary latch 2. As a result, the trigger 4 assumes a position relative to the motor drive 5 such that the drive rib 27 is displaced with its end face 29 against the blocking surface 28 upon confirmation and blocks the drive 5 (cf. FIG. 2 ). Independently of the trigger 4, the pawl 3 is urged by the spring 37 in the direction of the rotary latch 2. In this case, the blocking extension 33 of the pawl 3 abuts against the counter-contact flank 14 of the rotary latch 2; if the rotary latch closure 1 is now actuated from the open position (FIG. 2 ) into the pre-latching position (FIG. 5 ), the support section 24 travels over the inclined flank 21 of the storage rib 19 and rests on it (FIG. 4 ). The support section 24 is extended transversely to the plane of rotation of the rotary latch 2 or the pawl 3. Starting from FIG. 4, the rotary latch closure 1 could be moved back into the open position before the pre-latching position (FIG. 5 ) has been reached. In this position, the locking extension 33 of the locking pawl 3 abuts against the counter-abutment flank 14 of the rotary latch 2. If, however, the rotary latch 2 is pivoted further in the direction of the counter-locking part 11 by displacing the rotary latch closure 1, the counter-locking part 11 enters the capture opening 22 and then against the inner wall of the fork mouth 10 of the rotary latch 2. the rotary latch 2 is displaced into the pre-ratchet position (FIG. 5 ) and is blocked against pivoting of the rotary latch 2 in the opening direction by entering the blocking extension 33 of the pawl 3 into the latching cutout 13. The run-on of the support section 24 is simplified in this case by the support section 24 and the storage rib 19 each forming an inclined flank 21, 25. After the supporting section 24 has run up, the release 4 is displaced in the direction of the rotary latch 2; the contact flank 38 now bears against the counter-contact flank 14 of the rotary latch 2. The support section 24 lies on the broad side flank of the rib 19. the pawl 3 is displaced in the direction of the rotary latch 2 by the spring 37 in such a way that the locking extension 33 engages into the locking cutout 13 and locks the rotary latch 2 in the opening direction. The drive recess 26 of the trigger 4 is now arranged relative to the motor drive 5 in such a way that the helical drive rib 27 can engage in the latter. Opening of the rotary latch closure 1 by the motor drive 5 would be possible. The rotary latch 2 would then release the counter-closing part 11 again.If the trunk lid is now closed further, the counter-closing part 11 displaces the rotary latch 2 further counter-clockwise about the axis of rotation 7. Likewise, the contact flank 38 again abuts the counter-contact flank 14. As can be seen from FIGS. 4, 5 to 6, the drive recess 26 lies flush with the drive rib 27; opening of the rotary latch closure 1 by the motor drive 5 is possible. The rib 27 then dips into the recess 26. As can be seen in FIG. 6, the pawl 3 is now displaced relative to the trigger 4 in such a way that the contact surface 35 of the arm 34 bears against the counter-contact surface 36 of the trigger 4.In the operating position shown in FIG. 7, the trigger 4 together with the pawl 3 has been displaced by the motor drive 5 in such a way that the latter release the rotary latch 2. The pawl 3 is also displaced by the trigger 4 since the contact surface 35 of the arm 34 abuts against the counter-contact surface 36 of the trigger 4. When the motor drive 5 is actuated starting from the position according to FIG. 6, the helical drive rib 27 engages into the drive recess 26 and displaces the latter in the clockwise direction together with the pawl 3. As a result, the blocking extension 33 moves out of the latching cutout 13. The spring 16 displaces the rotary latch 2 in the opening direction and thus releases the counter-closing part 11. The trunk of the car can be opened. If the motorized drive 5 is rotated further into the starting position, the trigger 4 and the pawl 3 can again be displaced in the direction of the rotary latch 2. The position shown in FIG. 2 is reached because the trigger 4 can be displaced through the rearward displacement path.FIG. 8 illustrates the storage position of the trigger 4. After triggering of the trigger 4, it is not possible, for example, to open the trunk by a snow load. The rotary latch 2 is thus captured between a closed position and an open position. The motorized drive 5 can no longer be rotated any further, since the end face 29 abuts against the blocking surface 28. The motor drive 5 is thus blocked. The motor drive 5 is in the position which has been shown in FIG. 3. Thus, the trigger 4 is allowed to move toward the rotary latch 2. However, the trigger 4 can only be displaced until the support section 24 abuts against the storage rib 19. As in FIG. 5, the pawl 3 abuts with its contact surface 35 against the counter-contact surface 36 of the trigger 4. the support section 24 holds the trigger 4 together with the pawl 3 at a distance from the rotary latch 2 such that the locking extension 33 of the pawl 3 can slide past the locking cutouts 12, 13. In this case, the contact flank 38 of the release 4 is spaced apart from the counter-contact flank 14 of the rotary latch 2. The tailgate can now be opened with some aid. Shortly after passing over the latching cutout 13, which is provided for the pre-latching position, the support section 24 leaves the storage rib 19 and then abuts against the blocking rib 20 (cf. FIG. 9 ).However, it is also possible, starting from FIG. 8, not to completely open the trunk and yet to close the rotary latch closure 1 again. The trunk must be opened to such an extent that the counter-closing part 11 releases the rotary latch 2 to such an extent that the rotary latch closure 1 assumes the position in FIG. 9. The support section 24 lies shortly behind the inclined flank 21 of the storage rib 19 and the support section 24 is thus supported on the blocking rib 20. The rotary latch closure 1 now behaves as described above. The support section 24 is controlled by the inclined flanks 21, 25 onto the storage rib 19 and the blocking extension 33 can retract into the latching cutout 12, 13 and block the rotary latch 2 in the opening direction (cf. FIGS. 5 and 6 ).The drive rib 27 can only engage in the drive recess 26 when the contact flank 38 abuts against the counter-contact flank 14. Otherwise, the drive recess 26 of the trigger 4 is offset by the support section 24 relative to the drive rib 27 in such a way that it cannot engage in the drive recess 26. This is the case when the support section 24 abuts against the blocking rib 20 of the rotary latch 2 (cf. FIG. 2 ). The rotary latch closure 1 does not have to be fully open in order to be able to be closed again.It is also possible to open the rotary latch closure 1 again from a pre-latching position with the motor drive 5. It is therefore not necessary to close the rotary latch closure 1 completely again in order to be able to open it by motor.The invention has been described in the preceding embodiments with reference to a two-latch lock. However, the invention also includes snap-in latches, since problems occur there in a similar manner, which can also occur in the case of a two-snap-in latch. In the prior art, it is not possible to open a partially locked lock by motor. A lock is then considered to be only partially locked when the locking extension 33 of the pawl 3 only partially engages under the latching projection 12 of the rotary latch. The rotary latch is then rotationally locked, but the pawl has not yet been pivoted into its final locking position. This partial locking position can be reached when a high sealing pressure acts on the door or flap of a motor vehicle equipped with the closure. The frictional forces between the locking extension 33 and the latching step 12 can then lead to the locking pawl not pivoting completely into the locking position. Only when the load is relieved, for example by applying a pressure to the door or flap, can the locking pawl pivot into its final locking position. As a result of the measures according to the invention, the lock can be opened from any partial locking position.The exemplary embodiment illustrated in FIGS. 10, 11 to 12 is a rotary latch closure with a rotary latch 2 which is rotatably fastened to a housing base plate about a rotary latch axis 7. The rotary latch 2 has a fork mouth 10 with two fork mouth walls 10', 10", which extend substantially parallel to one another. The housing base plate has a capture slot 22 for the entry of a mating locking part 11 which is formed by a striker. While the rotation axis 7 is arranged on the one side of the catch slot 22, a rotation axis 41 of a pawl 3 is rotatably mounted on the lock housing 6 on the other side of the catch slot 22.Both the latch 2 and the pawl 3 are pivotably loaded by springs, not shown, for example torsion leg springs. The rotary latch 2 is urged into its open position by the torsion leg spring, not shown, that is to say in the clockwise direction in the representations. The pawl 3 is urged into the locking position shown in FIG. 10. The not-shown detent pawl spring thus acts on the detent pawl 3 in the counterclockwise directions in the illustrations.The counter-closing part 11 has a circular cross section, the diameter of which is smaller than the clear distance between the two walls 10', 10" of the fork mouth 10 running parallel to one another. The diameter is smaller by a distance A than the distance between the two walls 10', 10". This has the result that the counter-closing part 11 is accommodated in the fork mouth 10 with clearance of movement.In the closed position of the rotary latch 2, in which the counter-locking part 11 is captive, the walls 10', 10'' extend in the transverse direction to the direction of extent of the catch slot 22, the rotary latch 2 being held in the closed position by the pawl 3, a locking edge 33 of the pawl 3 lying in front of a latching step 12 of the rotary latch 2. In this closed position, the counter-closing part 11 is pressed against the wall 10' of the fork mouth 10 pointing in the opening direction.In the exemplary embodiment shown in FIGS. 10, 11 to 12, the counter-closing part 11 is acted upon by a leaf spring 42. This leaf spring 42 crosses the capture slot 22 with a central region and is firmly connected with its end regions to the housing 6.In the embodiment shown in FIGS. 13 and 14, the counter-closing part 11 is acted upon in the opening direction by a support slide 43 and is thus pressed against the first wall 10' of the fork mouth 10. For this purpose, the support slide 43 has a support flank which extends transversely to the direction of extent of the capture opening 22 and with which the support slide 43 acts on the counter-closing part 11. The support slide 43 has an inclined flank 43' opposite this flank, on which a counter inclined flank 44' of a wedge slide 44 engages, which is supported on a guide 45 of the housing 6. A compression spring 46, which is prestressed transversely to the opening direction and acts against the wedge slide 44, ensures, via the wedge surface contact, the required force with which the support slide 43 acts on the counter-closing part 11 in the opening direction. The angle of the wedge surfaces 44', 43' can be selected so that self-locking is provided. In order to release the support slide 43, the wedge slide 44 must be displaced back beforehand counter to the restoring force of the spring 46. This can be done with suitable levers or the like, which are actuated by a not-shown trigger, with which the pawl 3 can also be displaced from its blocking position into its release position.It is common to both exemplary embodiments that the mating closing part 11 in its bearing position on the first wall 10' of the fork mouth 10 has a distance A of approximately 0.5 mm to 1 mm from the second wall 10''.If, starting from the closed position of the rotary latch or blocking position of the pawl 3 shown in FIGS. 10 and 13, the pawl 3 is pivoted against the restoring force of the pawl spring, not shown, into the position corresponding to FIG. 12, the blocking edge 33 of the pawl 3 leaves the latching step 12 of the rotary latch 2, so that the rotary latch 2 can be driven in clockwise rotation by the rotary latch spring, not shown. The rotary latch 2 pivots at least until the second wall 10'' of the fork mouth 10 abuts against the counter-closing part 11. The first wall 10' leaves the mating closure part 11 when the mating closure part 11 is held in position by the action of external forces. In this pivoted position, shown in FIG. 12, a storage stage 18 of the rotary latch 2 has been pivoted into the pivoting range of the pawl 3, so that the pawl 3, as soon as the trigger, which has displaced the pawl 3 from its locked position into its released position, is no longer actuated, pivots the pawl 3 back against the storage stage 18.If, starting from this position shown in FIG. 12, the counter-closing part 11 is displaced in the opening direction, the rotary latch 2 follows this displacement until it has reached its open position. The mating closure part 11 can then emerge completely from the capture opening 22. The pawl 3 is further supported on a rear portion of the storage stage 18 and is thus prevented from being pivoted back into the locking position.To close the closure, the counter-closure part 11 is brought back into the capture opening 22. It then abuts the second wall 10'' of the fork mouth 10. In the course of a further displacement of the counter-closing part 11 counter to the opening direction, i.e. in the closing direction, the rotary latch 2 is rotated counter-clockwise with simultaneous tension of the rotary latch spring, not shown, until the pivoted position of the rotary latch 2 shown in FIGS. 11 and 14 is reached, in which the pawl 3 is no longer held in its release position by the storage stage 18. By virtue of the not-shown detent pawl spring, the detent pawl 3 is now pivoted counterclockwise, so that the detent edge 33 lies in front of the detent step 12.During this pivoting of the rotary latch, the counter-closing part 11 must be displaced into the capture opening 22 over the depth of insertion illustrated in FIGS. 10 and 13. In the exemplary embodiment shown in FIGS. 10, 11 to 12, the leaf spring 42 is tensioned during this overstroke. After the force bending the leaf spring 42 has been released, the leaf spring 42 displaces the counter-locking part 11 back into the position shown in FIG. 13, in which the counter-locking part 11 acts on the first wall 10' of the fork mouth.In the embodiment shown in FIGS. 13 and 14, no leaf spring force has to be overcome. During the opening movement of the rotary latch 2, the wedge slide 44 is displaced by actuators, not shown, into the retracted position shown in FIG. 14, in which the spring 46 is tensioned. In this position, the support slide 43 is not acted upon. It can consequently move away from the mating closure part 11. It overcomes a distance greater than distance A. Consequently, the support slide 43 does not have to be displaced in the course of the overstroke of the counter-locking part 11 which is required in order for the locking edge 33 of the pawl 3 to be able to pass in front of the latching stage 12 of the rotary latch 2. Only when the pawl 3 assumes its locking position shown in FIG. 14 is the movement of the wedge slide 44 released. The support slide 43 is then displaced in the direction of the first wall 10' of the fork mouth 10 and in the process exerts the force in order to keep the counter-closing part 11 in contact with the first wall 10'.The exemplary embodiment shown in FIGS. 15, 16, 17, 18, 19 to 20 has a storage element and is designed similarly to the exemplary embodiment shown in FIGS. 1, 2, 3, 4, 5, 6, 7, 8 to 9.Here too, a rotary latch 2 forming a main latching stage 12 and a pre-latching stage 13 is provided, which is mounted in a housing-fixed axis of rotation 7 counter to the restoring force of a rotary latch spring. The rotary latch 2 forms a fork mouth 10 for catching a counter-closing part. The rotary latch 2 has a switching arm 47 which interacts with a microswitch. The switching arm 47 acts upon a switching flag of the switch when it assumes its closed position shown in FIG. 15. In this closed position, a locking extension 33 of a locking pawl 3 lies in front of the main ratchet stage 12, and the rotary latch 2 is thereby held in its closed position.The pawl 3 is seated in a rear pocket of a release lever 4 and can be dragged by the release lever 4 into a release position. The trigger 4 can swivel back without entrainment of the pawl 3. There is thus clearance. The pawl 3 and the release lever 4 are pivotable about the same axis of rotation 41. The rotation axis 41 is firmly connected to the housing. The free end of the trigger 4 forms a drive recess 26 in which a drive rib 27 engages. The drive rib 27 is a portion of a worm which is mounted on a shaft 39 together with a gear 40 which is engageable by a drive motor. The shape of the screw 27 substantially corresponds to that shown in FIG. 3. Here too, a clearance angle α is provided, so that the triggering lever can be pivoted in a specific rotational position of the shaft 39. In this rotational position, the drive rib 27 is decoupled from the drive recess 26.When the trigger 4 is displaced from the position shown in FIG. 15 into the position shown in FIG. 16, the pawl 3 is dragged along. The displacement of the trigger from the closed position shown in FIG. 15 into the storage position shown in FIG. 16 takes place by rotating the drive shaft 39; along with this, the drive rib 27 engages in the drive recess 26 and pivots the trigger 4; along with this pivoting movement of the trigger 4, the locking extension 33 is removed from the locking step 12.The trigger 4 carries an axis. A pivot lever 42 is pivotably mounted about this axis. A free end of the storage lever 42 forms a support portion. The support portion forms the end face of the pivot lever 42.A pivot lever spring, not shown in the drawings, preferably designed as a torsion leg spring is provided, which spring loads the pivot lever 42 in the counterclockwise direction. In the closed position of the closure shown in FIG. 15, the pivot lever 42 rests with its support section 24 against a side wall 19' of the storage rib 19. This storage rib 19 extends substantially concentrically about the axis of rotation 7 of the rotary latch 2 and is seated on its broad side. Forming a radial step 45, the storage rib 15 merges into a blocking rib 20. The radial distance of the blocking rib, which is likewise arranged concentrically with respect to the axis of rotation 7, is smaller than the radial distance of the storage rib 19.When the trigger 4 is pivoted from the release position shown in FIG. 15 to the release position shown in FIG. 16, the support section 24 slides along the side wall 19' of the storage rib 19. In this case, the pivot lever 42 pivots in the counterclockwise direction as a result of the spring force acting on it. The pivot lever 42 can pivot until it abuts against a stop 48 of the release lever 4 in an over-center position. In this position, the storage lever 42 can be supported with its end face on the wide side wall 19' of the storage rib 19. In this position, the driving rib 27 exits from the driving recess 26. The trigger 4 is held in this position only by the abutment of the end face against the wide side wall 19' of the storage rib 19. As a result of the rotary entrainment of the rotary latch 3, the blocking extension 33 has been displaced out of the movement paths of the main ratchet 12 and the pre-ratchet 13.A rotary latch spring, not shown, acting on the rotary latch 2 can now displace the rotary latch 2 into the open position of the lock shown in FIG. 1 z. The end face slides along the radially outer flank 19' of the blocking rib 19. The storage lever 42 maintains its over-center position. Frictional forces introduced into it act in the direction of the stop 48, During the rotation of the rotary latch 2, the end face reaches the radial step 45, and when this occurs, the locking extension 33 has already run behind the pre-latching step 13, so that the locking extension 33 can bear against a counter-bearing surface 14 of the rotary latch, when the rounded section of the end face has passed over the step 45, so that the end face lies on the radially outer wall 20' of the locking rib 20.In the following phase of movement, the end face overflows the step 45, as a result of which the trigger 4 can pivot further counterclockwise until the end face abuts against the broad side 20' of the blocking rib 20. The pivoting movement of the release 4 takes place relative to the pawl 3, the latter being held in its position because of the engagement of the locking extension 33 on the mating contact flank 14.As can be seen from FIG. 17, the pivot lever 42, which can also be referred to as a storage lever, is still in its contact position with the stop 48 in the open position of the lock.If the pawl is rotated counterclockwise after a non-illustrated counter-locking part is caught, as shown in FIG. 18, then in a movement phase illustrated there the step 45 steps against the edge-rounded end section of the storage lever 42. In this case, the above-mentioned over-center position is overcome. After overcoming this over-center position, the closure reaches the movement position shown in FIG. 19. If, starting from this movement position, the rotary latch 2 is pivoted further in the counterclockwise direction, the pivot lever 42 is also pivoted further in the clockwise direction. This has the consequence that the trigger 4 can pivot counter-clockwise onto the rotary latch 2. As soon as the locking extension 33 has left the counter-contact flank, the locking pawl 3 can follow this pivoting movement in the counterclockwise direction. The movement is continued until the closed position shown in FIG. 15 is reached, in which the trigger 4 has reached a position in which the drive rib 27 can again enter the drive recess 26 and the pawl 3 lies with its locking extension 33 in front of the main ratchet stage 12.If the pivoting movement of the rotary latch 2 starting from the intermediate position shown in FIG. 19 is interrupted after the blocking extension 33 of the storage stage 13 has overflowed, the rotary latch 2 cannot be rotated back into the open position, since the blocking pawl 3 has already pivoted so far in the counterclockwise direction that its blocking extension 33 lies in front of the storage stage 13.

Claims

A rotary latch closure (1) having a rotary latch (2) and a pawl (3), wherein the pawl (3) can be displaced by actuating a trigger (4) from a blocking position holding the rotary latch (2) in a closed position into a release position in which the rotary latch (2) can rotate driven by a force, in particular a spring force, into an open position, wherein the rotary latch (2) passes, upon rearward displacement from its open position into its closed position, a pre-latching position in which the pawl (3) passes before a pre-latching stage of the rotary latch (2), wherein a storage means is provided in order to hold the pawl (3) in its release position when the rotary latch (2) is rotated from its closed position until beyond a pass of the pre-latching position, in a storage position of the storage means, characterized in that, the storage means comprises a support section (24) assigned to the trigger (4) which, when the trigger (4) is actuated to reach the storage position, passes in front of a storage stage (18) of the rotary latch (2) and leaves the latter again after passing the pre-ratchet position.Rotary latch closure according to claim 1, characterised in that the support section (24) is an element, in particular a tongue or a pivot lever (42) of the trigger (4).Rotary latch closure according to one of the preceding claims, characterized in that the storage stage (18) comprises a storage rib (19) in the form of a broad-side rib which is formed by the rotary latch (2).Rotary latch closure according to claim 3, characterised in that the support section (24), after leaving the storage rib (19), abuts against a blocking rib (20).Rotary latch closure according to claim 4, characterised in that during the closing movement of the rotary latch (2) from its open position into its closed position, the support section (24) slides along the blocking rib (20) and is controlled past the storage rib (19) as a result of a transverse control.Rotary latch closure according to one of Claims 4 or 5, characterized in that the support section (24) overflows the storage rib (19) in a manner controlled by oblique flanks.Rotary latch closure according to one of Claims 4 to 6, characterized in that the storage rib (19) and / or the blocking rib (20) run concentrically with respect to an axis of rotation (7) of the rotary latch (2).Rotary latch closure according to one of Claims 2 to 7, characterized in that the release (4) carries the pivot lever (42) which carries the supporting section (24) and the end face (46) of which, in the storage position, bears against a side wall (19') of the storage rib (19).Rotary latch closure according to one of Claims 2 or 8, characterized in that the pivot lever (42) is held in the storage position as a result of an over-center position.Rotary latch closure according to claim 9, characterised in that the over-center position is canceled as a result of the supporting section (24) running against a step (45).Rotary latch closure according to one of Claims 2, 8, 9 or 10, characterized bya stop which is assigned to the trigger (4) and against which the pivot lever (42) bears in the storage position.Rotary latch closure according to one of Claims 2, 8, 9, 10 or 11, characterized in that the pivot lever (42) is held in the storage position under the action of a spring force.Rotary latch closure according to one of the preceding claims, characterized in that the pawl (3) and the trigger (4) are mounted on a housing (6) of the rotary latch closure (1) such that they can be pivoted about the same axis (41).Rotary latch closure according to one of the preceding claims, characterized in that the pawl (3) and the trigger (4) are spring-biased independently in the direction of the rotary latch (2).Rotary latch lock according to one of the preceding claims, characterized in that the release (4) consists of plastic and the pawl (3) consists of steel.Rotary latch closure according to one of the preceding claims, characterized in that the pawl (3) is located in a pocket (31) of the trigger (4), wherein an extended pocket wall (32) forms the tongue forming the support section (24).A rotary latch closure (1) having a rotary latch (2) and a pawl (3), wherein the pawl (3) can be displaced by actuating a trigger (4) from a blocking position holding the rotary latch (2) in a closed position into a release position, in which the rotary latch (2) can rotate driven by a force, in particular a spring force, into an open position, wherein the rotary latch (2) passes, upon rearward displacement from its open position into its closed position, a pre-latching position, in which the pawl (3) passes before a pre-latching stage of the rotary latch (2), wherein a storage means is provided in order, in a storage position of the storage means, to hold the pawl (3) in its release position when the rotary latch (2) is rotated from its closed position until beyond a passage of the pre-latching position, having a motor drive (5) of the trigger (4) which moves the trigger (4) forwards for displacement of the pawl (3) from the blocking position into the release position, characterized in that the motor drive (5) releases the trigger (4) for rearward displacement when the storage position is reached in such a way that the pawl (3) can also be displaced into the pre-latching position or a partial locking position by motor-driven forward displacement of the trigger (4) into the release position.Rotary latch closure (1) with a rotary latch (2) and a pawl (3), wherein the pawl (3) can be displaced by actuating a trigger (4) from a blocking position holding the rotary latch (2) in a closed position into a release position, in which the rotary latch (2) can rotate driven by a force, in particular a spring force, into an open position, with a motor drive (5) of the trigger (4) which moves the trigger (4) forward for displacement of the pawl (3) from the blocking position into the release position, characterized in that the motor drive (5) releases the trigger (4) for the return displacement when the release position is reached in such a way that the pawl (3) can also be displaced from a partial locking position by motor-driven forward displacement of the trigger (4) back into the release position.Rotary latch lock (1) with a lock housing (6) supporting a rotary latch (2) and a pawl (3), wherein the rotary latch (2) has a fork mouth (10) formed by two walls (10', 10") spaced apart from one another, and wherein the pawl (3) in a locked position holds the rotary latch (2) in a closed position, in which closed position a counter-locking part (11) held in the fork mouth (10) bears against the first wall (10') of the fork mouth (10) facing in an opening direction, and can be moved into a release position, in which the rotary latch (2) can be rotated by the force of a rotary latch spring into an open position, in which the counter-locking part (11) can emerge from the fork mouth (10) of the rotary latch (2), wherein the rotary latch (2) released after the pawl (3) has been moved into the release position holds the pawl (3) in the release position after it has left its closed position, wherein the counter-locking part (11) resting against the first wall (10') in the closed position is at a distance (A) from the second opposite wall (10") which is sufficiently large that, when the counter-locking part (11) is held in position, the released rotary latch (2) pivots into the rotary position holding the pawl (3) in the release position, characterized bya force application device, which holds the counter-locking part (11) in contact with the first wall (10') in the closed position and which is brought out of action when the rotary latch (2) is rotated from the closed position into the open position or when the pawl (3) is pivoted from the blocking position into the release position and which is brought into action when the pawl (3) is pivoted from its release position into its blocking position.Rotary latch closure according to claim 19, characterised in that the force application device has a compression spring (46) which acts on a wedge slide (44) which interacts via a wedge surface connection (43', 44') with a support slide (43) which applies force to the counter-closing part (11) in the opening direction.

Images