CN110857606B

CN110857606B - Lock for a hood of a vehicle

Info

Publication number: CN110857606B
Application number: CN201910782468.3A
Authority: CN
Inventors: V·斯特克尔; M·费塞尔; J·韦莱克; J·库欣
Original assignee: Witte Automotive GmbH
Current assignee: Witte Automotive GmbH
Priority date: 2018-08-24
Filing date: 2019-08-23
Publication date: 2022-02-18
Anticipated expiration: 2039-08-23
Also published as: CN110857606A; DE102018214355A1

Abstract

The invention relates to a lock (1), in particular for a hood or tailgate of a vehicle, comprising at least: -a closing element (4), -a rotary latch (2), -a safety element (5), and-a blocking mechanism (3) for blocking the rotary latch (2) in the closed position (P1) of the lock (1), in the closed position, the rotary latch (2) and the closing element (4) are coupled in a closed manner, and a servo drive (6), which is designed as a bidirectional servo drive and is coupled to a locking mechanism (3) and thus interacts with said locking mechanism, such that, during a first actuation of the servo drive (6), the locking mechanism (3) unlocks the rotary latch (2) and the safety element (5) protects the closure element (4), and-during a second manoeuvre of the servo drive (6), the safety element (5) is opened and the closing element (4) can enter the open position (P2) of the lock (1).

Description

Lock for a hood of a vehicle

Technical Field

The present invention relates to a lock, in particular for a hood or tailgate of a vehicle.

Background

Locks of the type mentioned at the outset are used, for example, in motor vehicles for locking hoods, backrests, doors, hoods, tailgate, trunk lids or the like. To unlock the lock, a locking mechanism consisting of a pawl, a rotary latch and a closure element is moved by means of a servo drive, such as a servo motor, or manually, in order to adjust the pawl from a locked position to an unlocked position. In the unlocking position of the latch pawl, the rotary latch is released, so that it can be unscrewed from the closed position into the open position and release the closure element, for example a catch.

Disclosure of Invention

The object of the present invention is to provide an improved lock which is simple in construction, can be opened reliably and is easy to install.

The lock according to the invention, in particular for electrically actuable and stepwisely switchable locks of a hood or tailgate of a vehicle, comprises at least one closing element, a rotary latch, a safety element, and a blocking mechanism for blocking the rotary latch in a closed position of the lock, in which closed position the rotary latch is coupled in a closing manner to the closing element, for example a catch, and comprises a servo drive which is designed as a bidirectional servo drive and is coupled to the blocking mechanism and interacts with the blocking mechanism in such a way that, during a first actuation of the servo drive, in particular in a first actuation direction, the blocking mechanism releases the rotary latch and the safety element protects or blocks the closing element, and, during a second, opposite actuation of the servo drive, in particular in a second actuation direction opposite to the first actuation direction, the locking mechanism unlocks the security element and the closure element (can) enter the unlocked position of the lock.

The advantages achieved by the invention are, in particular, that the lock is constructed in a simple manner by means of a bidirectional drive, the space requirement is low, and a two-stage opening by means of a single servo drive is possible.

In one possible embodiment, during a first actuation of the servo drive, the locking mechanism releases or unlocks the rotary latch, wherein the rotary latch automatically, in particular with the aid of a spring, moves from a locked or locked position into an open or free position. Wherein the rotary latch releases a closing element, for example a catch, and this catch enters a safety position or a protected position in which it protects or locks the closing element. This ensures that even in the event of opening of the rotary latch, the lock does not spring open or open completely, since the closure element is held in the protected position by means of a safety element, for example a safety hook.

The rotary latch comprises, for example, a spring element, in particular a return spring. For example, the rotary latch is held in a spring-biased manner in a position in which the closing element is locked (i.e. a locked position of the rotary latch) by means of the spring element and the locking mechanism. If the rotary latch is unlocked, the spring element automatically brings the rotary latch into a position in which the closure element is released, so that this closure element, although unlocked and released by the rotary latch, can be adjusted to a position protected by the safety element and held there.

In a further possible embodiment, during a second actuation of the actuating drive, for example a cam, actuates the safety element, so that this safety element releases the closing element. In this way, the closing element can be brought into the open position of the lock, in particular automatically, for example with the aid of a spring or hydraulically. In particular, a movable element of the vehicle, such as the hood, automatically enters an open position with a latching element, such as a latch.

Furthermore, the safety element may comprise a spring, in particular a return spring. For example, the safety element is held in a position in which the closing element is protected (i.e. a protected position of the closing element) by means of the spring element and/or the cam. If the safety element is actuated by means of a cam and is adjusted into a position in which the closing element is not protected or released, the spring element is tensioned. During the closing of the lock, the closing element is automatically closed by means of the spring element and is adjusted or brought into, in particular deflected, a position in which it is protected or protected. The spring element is designed, for example, as an extension spring or a compression spring.

In one possible embodiment, the locking mechanism is designed as a locking pawl.

Furthermore, the servo drive, in particular the cam coupled thereto or the cam profile of the cam, can perform other functions. The cam and/or its cam contour are designed and, for example, coupled to the servo drive in such a way that the cam or cam contour is actuated by the servo drive during a first actuation of the servo drive. In this case, the cam or cam contour can engage with a locking mechanism, in particular a locking pawl, and actuate this locking mechanism, so that the rotary latch is released and unlocked. During a second actuation, in particular a reverse actuation, of the actuator, the cam or the cam contour engages with the safety element and actuates it, so that the closing element is unprotected and can be brought into the open position.

In order to reliably realize the multi-stage and especially the switching opening of the lock, the servo driver is cooperated with a switch mechanism.

In the closed state of the lock, all switching elements are open. In this closed state, the rotary latch locks the closing element, in particular the catch. The safety element is likewise in its position protecting the closing element. The rotary latch is adapted to lock the closure member in the closed state of the lock. The safety element is adapted to hold the closure element in the still protected position in the unlocked state of the rotary latch and to prevent undesired complete opening, so that the lock is only (able to) open slightly or not (able to) open at all.

Furthermore, a first switching element, for example an unlocking switching element, can be provided which is activated or in the activated state in the case of a locking mechanism (having) released the rotary latch and the closing element being unlocked but still in a protected position in which the closing element is held in a protected manner by the safety element. In this way, the closure element is in the unlocked state with protected protection. In other words: the locking mechanism is adjusted, in particular rotated, by means of the actuating drive into a position in which it releases the rotary latch, so that the rotary latch partially releases the closure element, wherein the closure element is still protected by the safety element.

For example, the first switching element is activated or actuated if, for example, due to actuation of the servo drive, for example by means of rotation and a kinematic coupling with the servo drive, for example by means of a rotating cam, the rotary latch has moved out of its latching position and/or the servo drive and/or the cam actuating this rotary latch has moved out of its starting position and/or the rotary latch is in its release position. Wherein the servo drive is moved in a first actuating direction in order to release the rotary latch. The rotary latch can now open automatically, for example based on a drive such as a spring drive. The closure member is partially released due to the release and automatic opening of the rotary latch. Wherein the closing element is moved from a protected and locked position into a protected and unlocked position, in which the safety element continues to protect the closing element from being completely opened.

For example, the switching mechanism comprises a second switching element, for example an actuating switching element, which is activated or in an activated state when the actuating drive and/or a cam actuated by the actuating drive is actuated and moved out of its starting position, for example to release a rotary latch or a safety element. For example, the first switching element is operated in case it is desired to open, operate the servo drive to release the rotary latch and/or the safety element, and/or operate the cam to release the rotary latch and/or the safety element. The second switching element is activated and deactivated a plurality of times, for example switched on or off. The second switch element is activated for the first time to release the rotary latch, and the second switch element is deactivated in the state in which the rotary latch has been released. To release the safety element, the second switching element is activated again.

Thus, in order to achieve unlocking of the closure element by opening the rotary latch, both the first and the second switching element are activated or in an activated state. If the closing element is in the protected and unlocked position, the servo drive is brought into its starting position by means of a reverse actuation. If the servo drive returns to its starting position, the second switching element (actuating switching element) is deactivated, in particular opened, with the closing element remaining in the protected unlocking position. The first switch element (unlock switch element) remains activated because the rotary latch is opened. This enables feedback on the position of the open latch and thus of the closing element in the protected unlocked position.

To achieve full turn-on, the switching pulse is given again. The servo drive is activated and starts a movement in a second actuation direction opposite to the first actuation direction in order to fully release the security element and fully unlock the lock.

In this case, a third switching element, for example an opening switching element, can be provided, which is activated or in an activated state when the closing element is completely released or in a completely released state and is opened or in an opened state.

Wherein the second and third switching elements are activated, in particular switched on, as the servo drive starts to move in the second actuating direction and thus out of the starting position. The first switching element is still in the activated state because the rotary latch is opened.

Wherein the security element is released first. The actuating drive is moved in a second actuating direction, which is opposite to the first actuating direction for releasing the rotary latch, in order to release the safety element when triggered by a switching pulse. In this way, the closure element is unprotected and released and can be opened completely. In this case, the safety element is switched on, for example directly by means of a servo drive. Alternatively, the safety element can be opened indirectly by means of a cam driven via a servo drive.

Furthermore, the movement of the servo drive in the second actuating direction can be limited by an end stop. If the safety element is in its open position, the closure element enters the open position.

In summary, in the open position of the lock (in which the rotary latch and the safety element are open, the closing element is fully released), all three switching elements are activated, in particular switched on. In the closed position of the lock (in which the closing element is locked by the closed rotary latch and the safety element is in its protective position), all three switching elements are deactivated, in particular opened. In the event of the servo drive and/or the cam or the actuating element driven by it leaving or having left its starting position, the second switching element is always activated. In the case of a rotary latch which has left its starting or rest position, the first switching element is activated. In the case of a safety element which has left its starting or rest position, the third switching element is activated.

In order to achieve a protected unlocking, the actuating drive can be activated and actuated, for example, only when at least the safety switch element is in its closed position. This ensures that the closure element does not open immediately with the unlocking of the rotary latch, but remains in the protected but unlocked position. In this protected position, the safety element holds the closing element and the safety switch element is activated.

Wherein, for the purpose of a protected unlocking of the rotary latch and the release and opening of the rotary latch, the servo drive is operated in a first operating direction, for example in a clockwise direction, and, for the purpose of releasing and opening the safety element, the servo drive is operated in a second operating direction opposite to the first direction, for example in a counterclockwise direction. This makes it possible to unlock the lock in a graduated and thus protected manner by means of a single servo drive.

In one possible embodiment, the servo drive is a servo motor which is designed to interact with the spindle drive. The spindle drive is in particular a threaded or toothed spindle (also referred to as threaded spindle) which is driven via a servomotor. A gear, in particular a gear, is engaged in the thread. The gear mechanism is, for example, a gear wheel with an external toothing system, which engages in a thread and rolls on this thread, or a disk or wheel segment with an external toothing system. Wherein the transmission is moved between the two end positions by means of the spindle during the actuation of the servomotor.

According to a further aspect of the invention, the lock has at least one closing module comprising at least a closing element, a rotary latch, a safety element and a blocking mechanism for blocking the rotary latch in a closed position of the lock, in which closed position the rotary latch and the closing element are coupled in a closed manner, and a drive module comprising a servo drive, which is constructed as a bidirectional servo drive, wherein the closing module and the drive module are both preassembled and in the preassembled state are coupled to each other and to each other.

The elements or components of the closing module are, for example, arranged and fixed on a carrier element, in particular a carrier plate, wherein the components of the closing module are mounted on the carrier element in a mechanically coupled manner with respect to one another. The drive module comprises a holding element, in particular a holding plate, on which the components of the drive module are arranged and mounted in a mechanically coupled manner with each other. The closing module and the drive module are held together by means of fastening elements, in particular fastening rivets or fastening bolts.

The invention provides a compact modular construction, in particular for an electrically actuated and stepped switchable lock, which is formed by two modules, namely a closing module and a drive module.

Drawings

Embodiments of the present invention will be described in detail with reference to the accompanying drawings. Wherein:

figure 1 is an exploded schematic view of a pre-assembled closure module and a pre-assembled drive module for a lock, particularly a hood lock,

fig. 2 is a schematic top view of a lock comprising a servo drive implemented as a bidirectional drive, having two operating directions for staged and in particular switched opening of the lock,

figures 3A to 3C are schematic views of the lock in the closed position (locked and protected), the unlocked but still protected position (unlocked and protected) and the open position (unlocked and unprotected),

figures 4A to 4B are schematic top views from the front and from the rear of the lock in the closed position (locked and protected),

figures 5A to 5B are schematic top views from the front and from the rear of the lock in the unlocked but yet protected position after activation of the servo drive in the first manoeuvring direction,

figures 6A to 6B are schematic top views from the front and from the rear of the lock in the unlocked but yet protected position after activation of the servo drive in the second manoeuvring direction,

figures 7A to 7B are schematic top views from the front and rear of the lock in the unlocked and unprotected position,

fig. 8A to 8B are schematic top views from the front and back of the lock in an unlocked and unprotected and fully open position (i.e. the open position of the lock).

Parts that are identical to one another are denoted by the same reference numerals in all the figures.

List of reference numerals

1 Lock

1.1 closing Module

1.2 drive Module

2.1 claw part

2.2 fastening rivets

2.3 spring element

3 locking mechanism

3.1 locking pawl

3.2 fastening rivets

3.3 jaw spring element

3.4 drive stop

3.5 switching profiles

4 closure element

5 Security element

5.1 claw hook

5.2 contact area

6 servo driver

6.1 Servo Motor

6.2 spindle drive

6.2.1 spindle

6.2.2 threads

6.3 Transmission device

6.3.1 wheel segment

6.3.2 external tooth system

7 bearing element

8 holding element

9 fastening element

10 cam

10.1 cam profile

10.2 unlocking cam

10.3 Unfencing cam

10.4 switching cam

10.5 recess

12 switch mechanism

12.1 first switching element

12.2 second switching element

12.3 third switching element

Closed position of P1 Lock

Protected position of PS Lock

Open position of P2 lock

PF1.. PF8 arrow

R1, R2 steering direction

S1, S2 Release position

E1, E2 end position

Detailed Description

Fig. 1 is an exploded schematic view of a latch 1 for a hood of a vehicle, for example.

The lock 1 is formed in particular by a preassembled closing module 1.1 and a preassembled drive module 1.2, which are mechanically coupled and connected to one another. The lock 1 is of an electrically, in particular electrically, and/or stepwise switchable design. As an alternative to the electric opening and closing of the lock 1, the lock can also be opened and closed by means of an electrically actuable hydraulic system, wherein this hydraulic system, which is not illustrated in detail, interacts with a switching mechanism 12 described below in order to achieve a stepped opening of the lock 1, as described here for the interaction with the servo drive 6.

The closure module 1.1 comprises at least one rotary latch 2, a locking mechanism 3 for locking the rotary latch 2 in the closed position P1 of the lock 1, a closure element 4 and a safety element 5. In the closed position P1 (i.e. the closed state of the lock 1), the rotary latch 2 is coupled in a closing manner with the closing element 4. The rotary latch 2 is locked by a locking mechanism 3 to prevent unlocking. Furthermore, the closing element 4 is in a protected position.

The drive module 1.2 comprises, for example, a servo drive 6 which is designed as a bidirectional servo drive. The servo drive 6 comprises, for example, a servo motor 6.1, which is coupled to the spindle drive 6.2 on the output side.

Both the closing module 1.1 and the drive module 1.2 are preassembled. In the preassembled state, these modules are coupled to one another and form the lock 1. The above-mentioned elements or components of the closing module 1.1 are arranged and fixed, for example, on a carrier element 7, in particular a carrier plate, wherein the components of the closing module 1.1 are mounted on the carrier element 7 in a mechanically coupled manner with respect to one another.

The drive module 1.2 comprises a holding element 8, in particular a holding plate, on which the components of the drive module 1.2 are arranged and mounted in a mechanically coupled manner with each other. The closing module 1.1 and the drive module 1.2 are held together by means of fastening elements 9, in particular fastening rivets or fastening bolts.

Such a lock 1 with a modular structure is particularly compact and easy to install.

In the following figures, in order to better illustrate the function of the lock 1, the closing module 1.1 and the drive module 1.2 are shown without the carrier element 7 or the holding element 8.

Fig. 2 is a schematic top view of a lock 1 comprising a servo drive 6 implemented as a bidirectional drive with two actuation directions R1 and R2 for stepped and in particular switched opening of the lock 1. Fig. 2 shows the lock 1 in the closed position P1.

The lock 1 comprises at least a closing element 4, a rotary latch 2, a safety element 5 and a blocking mechanism 3 for locking the rotary latch 2 in a closed position P1 in which the rotary latch 2 is coupled in a closing manner with the closing element 4, for example a shackle (fig. 2, 3A, 4B).

The actuating drive 6 is coupled to the locking mechanism 3 and interacts with this locking mechanism in such a way that a stepped unlocking of the lock 1 is achieved by means of a single actuating drive 6. For this purpose, the actuating drive 6 can be actuated in two actuating directions R1 and R2, wherein during a first actuation of the actuating drive 6, in particular in the first actuating direction R1, the locking mechanism 3 unlocks or releases the rotary latch 2 and opens it (fig. 3B, 5A, 5B). The safety element 5 protects the closing element 4, in particular against falling out.

During a second actuation of the actuator 6, in particular in a second actuation direction R2, in particular opposite the first actuation direction, the locking mechanism 3 unlocks and unlocks the security element 5 (fig. 3C, 7A to 8B). In so doing, the closing element 4 can enter the opening position P2 of the lock 1, as shown in fig. 3C.

The spindle drive 6.2 is in particular a spindle 6.2.1 with a thread 6.2.2 or a tooth profile (also referred to as thread spindle). The spindle 6.2.1 is coupled to the servomotor 6.1 and is driven via this servomotor. The gear 6.3, in particular the gear, engages in the thread 6.2.2. The gear is, for example, a gear wheel with an external toothing system, or a disk or wheel segment 6.3.1 with an external toothing system 6.3.2, which engages in the thread 6.2.2 and rolls on this thread. During the actuation of the servomotor 6.1, the gear 6.3 is moved by the spindle 6.2.1 between the two end positions E1 and E2.

The closing element 4 is designed, for example, as a conventional catch, which is fastened in particular to a movable part of the vehicle, such as the engine hood. The lock 1 is fixed to a frame (not shown in detail), for example, on the vehicle body side.

The rotary latch 2 is designed, for example, as a claw 2.1, which is held on a carrier element 7 of the closing module 1.1 in a rotatable manner by means of a fastening rivet 2.2. The rotary latch 2 further comprises a spring element 2.3, such as a return spring or an extension spring. By means of the spring element 2.3, the rotary latch 2 and in particular the pawl 2.1 is automatically brought from the latched position (as shown in fig. 2, 3A, 4B) into the open position (as shown in fig. 3B, 3C, 5A, 5B to 8B) during the unlocking process. The open position of the rotary latch 2 is the position in which the closure element 4 is unlocked, in which position the closure element 4 (can) be adjusted to a position which, despite the unlocking, is protected by the safety element 5, as shown, for example, in fig. 3B, 5A, 5B, 6A and 6B.

The locking mechanism 3 is formed, for example, by a locking pawl 3.1, which is mounted in a rotating manner on a carrier element 7 by means of a fastening rivet 3.2. The locking mechanism 3 further comprises a claw spring element 3.3. The claw spring element 3.3 is designed, for example, as a restoring spring or as an extension spring. By means of the pawl spring element 3.3 the catch pawl 3.1 is automatically moved back into the blocking position, in which it locks the rotary latch 2 to prevent the lock 1 from opening.

Furthermore, a cam 10 is provided. The cam 10 can be a component of the closing module 1.1 or of the drive module 1.2. In the present exemplary embodiment, the cam 10 is a component of the drive module 1.2 and is coupled, for example, in a rotationally fixed manner to the gear 6.3. For example, the cam 10 and the gear 6.3 are rotatably mounted on the fastening element 9.

The cam 10 is designed, for example, as a circular arc segment or as a swivel arm with an outer cam contour 10.1. The cam 10 and/or the cam profile 10.1 are coupled to the servo drive 6 in such a way that during a first actuation of the servo drive 6 in a first actuation direction R1 (rotational direction), the cam 10 is moved into the corresponding release position S1 by means of the servo drive 6. In this release position S1, the cam 10 or the cam contour 10.1 engages with the locking mechanism 3, in particular the catch pawl 3.1, and actuates said catch pawl, so that the rotary latch 2 is released and unlocked with the transmission 6.3 in the first end position E1, as shown in fig. 3B and 5B.

In this case, the spindle drive 6.2 is rotated by means of the servomotor 6.1 in the first actuating direction R1, so that, owing to the coupling of the spindle drive 6.2, the gear 6.3 and the cam 10, this cam enters the release position S1 for the rotary latch 2.

During a second actuation of the servo drive 6, the spindle drive 6.2 is rotated by means of the servo motor 6.1 in a second actuation direction R2, which is opposite to the second actuation direction R1. In this way, due to the coupling of the spindle drive 6.2, the gear 6.3 and the cam 10, the cam 10 enters the second release position S2, in which it engages with the safety element 5 and operates it, so that the closing element 4 is no longer protected and can be adjusted to the open position P2 of the lock 1. In a particular embodiment, for example, the movable element, for example the hood, is opened.

Fig. 3A, 3B, 3C are schematic views of the lock 1 in a closed position P1 (locked and protected), an unlocked but still protected (intermediate) position PS (unlocked and protected) or an open position P2 (unlocked and unprotected). In fig. 3A to 3C, the rotary latch 2 is not shown in detail in order to better show the locking mechanism 3 and the associated switching mechanism 12.

In the closed position P1, the closure element 4 is locked by the rotary latch 2 and the safety element 5 remains in its protective position (fig. 3A).

In the unlocked but still protected position PS, the closing element 4 is released and unlocked by the rotary latch 2 and is held in a protected manner by the safety element 5 (fig. 3B).

In the open position P2, the closure element 4 is both unlocked and unprotected, so that the lock 1 is fully opened (fig. 3C).

The switching mechanism 12 comprises at least three switching elements 12.1 to 12.3.

In order to reliably realize a multi-stage and in particular a switching opening of the lock 1, the actuating drive 6 interacts with a switching mechanism 12. This secured opening of the lock 1 is effected, inter alia, by means of only one servo drive 6, which is explained in more detail below:

in the closed state of the lock 1, all switching elements 12.1 to 12.3 are open. In this closed state, the rotary latch 2 locks the closing element 4, in particular the catch. The safety element 5 is likewise in its position protecting the closing element 4. The rotary latch 2 is adapted to lock the closure member 4 in the closed state of the lock 1 (i.e. closed position P1). The safety element 5 is adapted to keep the closing element 4 in a still protected position in the unlocked (open) state of the rotary latch 2 and to prevent undesired complete opening, so that the lock 1 is only (able to) open slightly or not (able to) open at all.

The switching mechanism 12 comprises, for example, an unlocking switch element serving as a first switch element 12.1, which is activated or switched on or in an activated or switched-on state in the event of the release or release of the rotary latch 2 by the blocking mechanism 3, so that the rotary latch 2 is (can) automatically switched on (as shown in fig. 3B) and the closing element 4 is unlocked. Wherein the closing element 4 is held in a manner yet protected by the security element 5. In this state, the safety element 5 therefore still protects or locks the closing element 4. In the event that the rotary latch 2 is released and/or opened and/or the safety element 5 is in a position protecting the closing element 4, the first switching element 12.1 is always activated.

Alternatively or additionally, in this safety position or protected position PS of the lock 1, the first switching element 12.1 can also be activated or in the activated state by the safety element 5, since the safety element 5 is in and remains in a position protecting or blocking the closing element 4 (see fig. 3B, 5A, 5B, 6A, 6B).

In the open position P2, the first switching element 12.1 can be deactivated, for example opened (see fig. 3C). The first switching element 12.1 is, for example, a contact switch which is switched on when the rotary latch 2 is released or opened and/or the safety element 5 is in its position protecting the closing element 4 and is, for example, in contact with the first switching element 12.1.

Furthermore, an actuating switch element can be provided as a second switch element 12.2, which is (or has been) activated, for example switched on, in particular several times in order to release the rotary latch 2 or the safety element 5, in the event of actuation and removal of the servo drive 6 and/or the cam 10 actuated by it, in order to enable the rotary latch 2 to be opened and the safety element 5 to be opened (shown in fig. 3B, 5A, 5B or 3C, 7A, 7B).

An opening switch element may be provided, which acts as a third switch element 12.3, which is activated or in an open state, for example switched on, when the safety element 5 is opened or in an open state with the rotary latch 2 open (as shown in fig. 3C, 7A, 7B).

The switching mechanism 12 may adopt the following construction scheme: the servo drive 6 can only be activated or actuated to open the lock 1 if at least the security element 5 is in its position protecting the closing element 4. This ensures that the closure element 4 does not open immediately or undesirably with the unlocking of the rotary latch 2, but remains in the protected (but unlocked) position PS. In this protected position PS, the safety element 5 holds the closing element 4, with the first switching element 12.1, which is designed as an unlocking switching element, activated or kept activated, for example kept switched on.

In order to hold the closure element 4 in the protected position PS, in which the rotary latch 2 is opened, the safety element 5 has a claw hook 5.1, in which the closure element 4 can be held. In the holding area, the claw-shaped hook 5.1 corresponds to the holding area of the claw 2.1 of the rotary latch 2.

Fig. 4A to 4B are schematic top views from the front and from the rear of the lock 1 in the closed position P1 (locked and protected). In this closed position P1, none of the switching elements 12.1 to 12.3 is activated. Wherein the rotary latch 2 is locked by the pawl 3.1 and the closing element 4 is held in the closed position P1 by the rotary latch 2. The security element 5 is in its protective position.

The switching elements 12.1 to 12.3 are deactivated, for example, switched off.

In the event that it is desired to unlock the lock 1, for example in the event of triggering of a corresponding switching pulse, the servo drive 6 is activated and the cam 10 is actuated. The second switching element 12.2 is activated by a movement of the cam 10 from its starting or rest position and/or by a movement of the servo drive 6 in the first actuating direction R1. When the rotary latch 2 has been released, or the rotary latch is open or in the open state, the first switching element 12.1 is activated. The safety element 5 is in or remains in the position in which the closing element 4 is locked (see fig. 3B, 5A, 5B, 6A, 6B).

Fig. 5A to 5B are schematic top views from the front and from the rear of the lock 1 in the unlocked but yet protected position PS after activation of the servo drive 6 in the first steering direction R1. The servo drive 6 receives a pulse for unlocking the lock 1 and actuates the servo motor 6.1, which drives the spindle 6.2.1 and rotates it in the first actuating direction R1.

The rotation of the spindle 6.2.1 is transmitted to the cam 10 via the transmission 6.3. Therein, the wheel section 6.3.1 enters the end position E1 according to arrow PF1 on the basis of the rolling of the external toothing system 6.3.2 in the thread 6.2.2 of the spindle drive 6.2. In this way, the cam 10 is actuated, in particular rotated, according to the arrow PF2, and the locking pawl 3.1 is adjusted, in particular rotated, by the cam according to the arrow PF3 into a release or unlocking position for the rotary latch 2. Fig. 5B shows the entrainment of the locking pawl 3.1 by the cam 10, which is achieved by the engagement of the cam 10, in particular of the unlocking cam 10.2, on the drive stop 3.4 of the locking pawl 3.1. By rotating the locking pawl 3.1, the locking pawl 3.1 is released from the locking (not shown) with the rotary latch 2, thereby releasing the rotary latch 2, which is automatically moved into the free position according to arrow PF4 and is unlocked. From the closed position P1, the closing element 4 enters a protected position PS, for example a movable element such as a hood "slightly" or "slightly" lifted or opened.

The second switching element 12.2 (actuation switching element) is activated, for example, with the start of rotation of the cam 10. When the locking mechanism 3 starts to release or unlock the rotary latch 2, the second switching element 12.2, which is embodied as an actuating switching element, is activated or is activated as a result.

As shown in fig. 5B, the first switching element 12.1 (unlocking switching element) is activated when the cam 10 brings the catch pawl 3.1 into a position in which the locking mechanism 3 completely releases or unlocks the rotary latch 2, so that this rotary latch automatically opens and releases the closure element 4, for example by means of the spring element 2.3 according to arrow PF 4.

The safety element 5 is still in the protected position PS, so the released or unlocked closing element 4 is still protected by the safety element 5. The first switching element 12.1 is therefore activated, for example switched on, since the safety element 5 remains in contact with the first switching element 12.1, for example via the contact region 5.2.

Fig. 6A to 6B are schematic top views from the front and from the rear of the lock 1 in the unlocked but yet protected position PS after activation of the servo drive 6 in the second steering direction R2. When the second switching element 12.2 and the third switching element 12.3 are activated, for example switched on, the servo drive 6 is actuated again, so that it returns to the starting position.

The servomotor 6.1 in particular rotates the spindle drive 6.2 in a slave steering direction R2 opposite to the first steering direction R1. In this way, the gear 6.3, in particular the wheel segment 6.3.1, is moved from the end position E1 according to the arrow PF5 until the second switching element 12.2 is deactivated, for example, is switched off, since the actuating drive 6 and/or the cam 10 are in their starting position.

The first switching element 12.1 is still active, for example switched on, because:

the closing element 4 is still held in the protected position PS by means of the safety element 5, and the safety element 5 activates the first switching element 12.1 in this position.

The catch 3.1 activates the third switching element 12.3 by means of the switching contour 3.5.

The safety element 5 is still in the protected position PS, so the released or unlocked closing element 4 is still protected by the safety element 5.

Fig. 7A to 7B are schematic top views from the front and from the rear of the lock 1 in the unlocked and partially unprotected position. For this purpose, the servo drive 6 receives a further opening pulse, so that the servo drive 6 is driven in the second actuating direction R2. In this way, the transmission 6.3, in particular the wheel segment 6.3.1, is moved according to the arrow PF5 until the other end position E2 is reached.

In this case, both the second and the third switching elements 12.2 and 12.3 are activated, in particular switched on. For example, the second switching element 12.2 is activated as a result of the start of the movement of the servo drive 6 and/or the cam 10, and the third switching element 12.3 is activated as a result of the movement of the catch 3.1 that releases the safety element 5 and/or as a result of the movement of the safety element 5 itself. For this purpose, the latch 3.1 comprises, for example, a switching contour 3.5, which, with the start of the movement of the latch, comes into contact with the third switching element 12.3 and switches this switching element on.

According to the rotational movement of the wheel segment 6.3.1, the cam 10 rotates according to the arrow PF6 and engages with the safety element 5, in particular with the safety hook, and presses this safety hook into an unprotected or unprotected position, as shown in fig. 5A and 5B, in which the closing element 4 can be completely opened.

For this purpose, the cam 10 comprises, for example, a release cam 10.3 which engages with the outer contour of the claw hook 5.1 of the safety element 5 and moves, in particular rotates, it according to the arrow PF7 from the position in which it protects the closing element 4.

By means of the contact of the deprotection cam 10.3 on the safety element 5 and the actuation of the safety element in the deprotection direction according to arrow PF7, the safety element 5 interacts with the third switching element 12.3 and the third switching element 12.3 is activated, for example switched on, as shown in fig. 7A to 8B. In particular, the contact area 5.2 is separated from the switching element 12.3 and the switching element is activated.

The catch pawl 3.1 remains in the position unlocked and the rotary latch 2 is opened, and the first switching element 12.1 thereby remains in the activated state.

Due to the rotation of the cam 10, during the deprotection of the closing element 4 and the complete opening of the lock 1, the switching cam 10.4 engages with the second switching element 12.2 and reactivates this switching element, for example switches it back on.

The servomotor 6.1 is actuated until an end stop is reached, for example the wheel segment 6.3.1 reaches the other end position E2, and a predetermined time is waited for in this position.

The closing element 4 can now be adjusted according to arrow PF8 to the fully open position (lock 1 open position P2), as shown in fig. 8A and 8B.

Fig. 8A to 8B are schematic top views from the front and from the rear of the lock 1 in the unlocked and unprotected and fully open position (i.e. the open position P2 of the lock 1).

After waiting a predetermined time in the end position E2, the servomotor 6.1 is activated and started, so that the servomotor 6.2 is driven again in the opposite direction, and thus in the first actuating direction R1, until the cam 10 has reached its starting position or another predetermined position, in which the second switching element 12.2 is deactivated. For this purpose, the cam 10 has, for example, a corresponding recess 10.5 in the cam contour 10.1.

The closing element 4 is now in the fully open position (i.e. the open position P2 of the lock 1).

Claims

1. A lock (1) comprising at least:

a closing element (4) for closing the opening,

a rotary latch (2) is provided,

a security element (5), and

a blocking mechanism (3) for blocking the rotary latch (2) in a closed position (P1) of the lock (1), in which the rotary latch (2) and the closing element (4) are coupled in a closing manner, and

a servo drive (6) which is designed as a bidirectional servo drive and is coupled to the locking mechanism (3) and interacts with the locking mechanism in such a way that

During a first actuation of the servo drive (6) in a first actuation direction, the servo drive (6) drives the blocking mechanism (3) to unlock the rotary latch (2) to release the closure element (4), and the safety element (5) protects the closure element (4), and

during a second actuation of the servo drive (6) in a second actuation direction, the servo drive (6) drives the safety element (5) in order to release the closing element (4) in such a way that the closing element (4) can be moved into the open position (P2) of the lock (1), wherein the servo drive (6) interacts with the switching mechanism (12) and a second switching element (12.2) is provided which is activated or is in the activated state when the servo drive (6) and/or a cam (10) which can be actuated by the servo drive is actuated and/or is moved out of its starting or rest position.

2. Lock (1) according to claim 1, wherein

During a first actuation of the servo drive (6), the locking mechanism (3) unlocks the rotary latch (2) and the rotary latch automatically moves from a locked position into a free position, wherein the rotary latch (2) releases the closure element (4) and the closure element moves into a protected Position (PS), in which the safety element (5) protects or locks the closure element (4).

3. Lock (1) according to claim 1 or 2, wherein

During a second actuation of the servo drive (6), the safety element (5) is actuated and releases the closing element (4), and the closing element enters the open position (P2) of the lock (1).

4. Lock (1) according to claim 1 or 2, wherein the blocking mechanism (3) is constructed as a locking pawl (3.1).

5. The lock (1) according to claim 1 or 2, wherein a first switch element (12.1) is provided, which is activated or in an activated state in case the rotary latch (2) is released or in a released state, or the rotary latch is open or in an opened state, and/or the closing element (4) is unlocked.

6. The lock (1) according to claim 1 or 2, wherein a third switching element (12.3) is provided, which is activated or in an activated state in case the safety element (5) is released or in a released state, or the safety element is opened or in an opened state, and/or the closing element (4) is unprotected.

7. Lock (1) according to claim 1 or 2, wherein the servo drive (6) is a servo motor (6.1) which is constructed to co-act with a spindle drive (6.2).

8. Lock (1) according to claim 1 or 2, wherein for releasing the rotary latch (2) and moving the closing element (4) into the protected Position (PS), the servo drive (6) and/or the cam (10) is/are operated in a first operating direction, and for releasing or opening the safety element (5) and moving the closing element (4) into the open position (P2), the servo drive and/or the cam is/are operated in an operating direction (R2) opposite to the first operating direction (R1).

9. Lock (1) according to claim 1 or 2, comprising at least:

-a closure module (1.1) comprising at least the closure element (4), the rotary latch (2), the safety element (5) and the blocking mechanism (3) for locking the rotary latch (2) in a closed position (P1) of the lock (1), in which closed position the rotary latch (2) and the closure element (4) are coupled in a closing manner, and

a drive module (1.2) comprising the servo drive (6) constructed as a bidirectional servo drive,

wherein the closing module (1.1) and the drive module (1.2) are preassembled and then coupled to one another.

10. Lock (1) according to claim 1 or 2, for the bonnet or bonnet of a vehicle.