EP2929112B1 - Lock for a hatch or a door - Google Patents

Description

The invention relates to a lock for a flap or a door having the features of the preamble of claim 1. The door or flap may be a door or flap of a motor vehicle or a building.

The aforementioned lock comprises a locking mechanism with a catch and at least one pawl, with which the catch can be locked in a closed position. The pawl is biased at least temporarily by a spring, in particular a leg spring in the direction of detent position, for example, in the document DE 10 2008 061 524 A1 known way. By the spring, a force is at least temporarily exerted on the pawl, which is able to move the pawl in the direction of detent position. In addition, a lock according to the invention comprises a release lever with which a latched locking mechanism can be unlocked. Actuation of the release lever causes the pawl to leave or leave its detent position.

A spring which biases the pawl in the direction of detent position hinders an opening process of the locking mechanism. To avoid this problem is according to document DE 10 2008 061 524 A1 proposed to relieve the pawl during an opening movement of the rotary latch by the force acting on the pawl spring preload is reduced or even canceled.

Further, to the publications DE 10 2007 003 948 A1 and US 2011/0012376 A1 noted, which also reveal locks for motor vehicles.

It is an object of the invention to further develop a lock of the type mentioned, soft can be opened in a simple manner reliably with little effort.

The object of the invention is achieved by a lock with the features of the first claim. Advantageous embodiments emerge from the subclaims. To solve the problem, a lock for a door or flap is provided with a locking mechanism of the catch and at least one pawl for locking the catch. In addition, the lock comprises a release lever with which the latched locking mechanism can be unlocked by actuating the release lever. The lock comprises a spring for moving the pawl in the direction of detent position. The release lever is designed so that its actuation, the spring force acting on the pawl, at least reduced, but preferably canceled.

An actuation of the release lever thus reduces at least the spring force which presses the pawl in the direction of the detent position. Since such a force hinders unlocking a Gesperres, this obstruction is at least reduced or even completely eliminated by pressing the trigger lever when the spring force is completely released. Since the release lever assumes a dual function, the number of required parts is kept low. This advantageously allows a production with little effort, with little space and low weight.

In order to reduce the spring force acting on the pawl during opening or unlocking of the locking mechanism at least, according to the invention, the responsible pawl spring can abut against a lever arm of the release lever and that at least when the release lever is actuated for opening the locking mechanism , and / or the pawl spring is applied to a lever arm of the pawl for moving the pawl in the direction of detent position in order to lock the locking mechanism in a simple and reliable manner.

The above-mentioned lever arm of the pawl and the lever arm of the release lever mentioned in the preceding paragraph are advantageously arranged one above the other in a locked state of the locking in order to reliably achieve the desired relief of the pawls during opening in a structurally compact manner.

In order to enable a compact design with a small number of parts further improved, the pawl and the release lever are rotatably mounted in one embodiment on a common axis.

The catch can in one embodiment for unlocking the locking mechanism without high force an opening moment in the pawl to initiate to move the pawl from a detent position out. Advantageously, the catch is therefore biased by a spring in the direction of the open position to be able to initiate such an opening moment in the pawl even without the presence of a door seal pressure. How catch and pawl can be constructed to initiate an opening moment in the pawl through the catch, inter alia, in the document DE 10 2007 003 948 A1 described.

In order to improve the reliability, there is in one embodiment of the invention, a driver, which is able to move the pawl complementary to a detent position out. "Coming out" means that there is at least one other mechanism by which the pawl can be moved out of its detent position. The driver is preferably attached to the release lever to make the lock with little space and low weight can. In particular, the arm of the release lever, which is able to relieve the pawl during unlocking the locking mechanism, is made of the same Reasons provided with this driver. The driver moves the pawl preferably delayed from its rest position. This is to be understood that according to plan, the pawl is to be moved in another way out of its rest position out is moved by the further mechanism from its locking position and in particular due to an opening moment, which is introduced by the catch in the pawl. Only when this scheduled mechanism fails, the driver ensures that the pawl is still moved out of its detent position.

To lock the locking particularly reliable, there is in one embodiment, a blocking lever that is able to block the pawl in a locked position. If the ratchet is capable of initiating an opening moment into the pawl in the latched state, the blocking lever ensures that the ratchet is not unlatched unintentionally.

In one embodiment of the invention, the release lever is capable of moving the blockage lever out of its blocking position. For this purpose, in principle, a relatively small amount of force is sufficient. If the pawl subsequently moves due to an opening moment, which is introduced by the catch into the pawl, out of its detent position, it is advantageous overall very little effort that must be expended for opening the locking mechanism.

In one embodiment, there is a spring for moving the blockage lever to its blocking position. In a simple and reliable way, the blocking lever can be moved by the spring in its blocking position. In one embodiment, the blocking lever and pawl are configured so that by moving the blocking lever to its blocking position, the pawl thereby at the same time moved into its detent position. The number of parts needed is minimized further. This goes hand in hand with a reduction in weight as well as a reduction in the installation space.

The release lever comprises in one embodiment three lever arms. By means of a first lever arm in particular a blocking lever is moved from its blocking position for unlocking the locking mechanism. By means of a second lever arm of the release lever, the pawl is preferably relieved in the manner described, so at least during opening of the locking mechanism, the spring force is reduced, which is able to move the pawl in the detent position. Preferably, this second lever arm advantageously further comprises a driver for moving the pawl out of its locking position in order to be able to produce compact and simple. The third lever arm activates the release lever, for example with the aid of a linkage or Bowden cable, and with a handle connected to it. If the handle is actuated, so that the lever arm is actuated and the release lever for unlocking the locking mechanism moves and in particular pivoted about an axis. Advantageously, there is also a stop in particular for the purpose of minimizing the installation space and the weight for the second lever arm to prevent the release lever is moved beyond a desired end position.

The pawl preferably comprises two lever arms. With a lever arm, the catch is locked. On the other lever arm, the spring acts to move the pawl using the spring in its locked position can. This other lever arm of the pawl is optionally detected by a driver of the release lever for unlocking the locking mechanism and moved accordingly, in particular pivoted about an axis. Advantageously, there is also a stop for this other lever arm to prevent the pawl is moved beyond its detent position.

A blocking lever for blocking the pawl in its latched position preferably comprises two lever arms. A first lever arm of the blocking lever is able in particular to block the pawl in its latched position and / or to move the pawl into its latched position. In particular, this first lever arm can advantageously also be detected in one embodiment of the release lever and moved out of its blocking position, in particular to be pivoted about an axis. The second lever arm of the blocking lever can preferably be moved against a stop, in order to avoid that the blocking lever can be moved beyond an intended end position. The provision of a second lever arm also advantageously contributes to shifting the center of gravity of the blocking lever in the direction of the axis about which the blocking lever can be pivoted. This shift of the center of gravity facilitates pivoting of the blocking lever.

In one embodiment, the blocking lever can at the same time form the release lever in order to minimize the parts.

An inventive locking mechanism is mounted in particular on a usually made of metal lock plate or a usually made of metal lock case. Usually, such a lock also includes a lock housing, which is usually made of plastic and which is able to shield components of the castle to the outside. In addition, there may be a particular existing plastic lock cover and / or a particular existing plastic cover for a central locking, which also serve the shield. The lock may, for example, belong to a door or a flap of a building or the door or a flap of a motor vehicle.

The invention also includes such a lock with a pawl for the position of the main catch of the catch (also called "main pawl"), a pawl for the position Vorrast the catch (also called "pre-locking pawl") and advantageously a blocking lever for said Main ratchet pawl. Such a lock is in print DE 10 2008 061 524 A1 mentioned. However, a lock according to the invention may also comprise, in addition to a blocking lever, only one pawl for locking the catch in a position "pre-rest position" and a position "main rest".

The catch has a fork-shaped inlet slot into which a locking pin of a door or flap enters when the vehicle door or vehicle door is closed. The locking pin then rotates the catch from an open position to a locked position. In the locked position, the locking bolt can no longer leave the inlet slot of the rotary latch. The pawl locks the catch in the locked position, so that it can not be moved back into the open position.

In a lock according to the invention, there are components such as pawl, blocking lever or rotary latch, which can and should be pivoted. There is regularly at least one prestressed spring, in particular leg spring, with which a desired pivoting movement of such a component is effected by spring force. Such a prestressed spring is capable, for example, of moving a pawl into its locking position, of moving a blocking lever into its blocking position or of turning a catch into its open position.

Figur 1:

Gesperre zu Beginn eines Öffnungsvorgangs;

Figur 2:

Gesperre aus der Figur 1 von der Rückseite.

Show it

FIG. 1:

Locking at the beginning of an opening process;

FIG. 2:

Locking out of the FIG. 1 from the back.

In the FIG. 1 a locking mechanism comprising a rotary latch 1, a pawl 2, a blocking lever 3 and a release lever 4 is shown. The rotary latch 1 can be pivoted about its axis 5. The pawl 2 and the release lever 4 can be pivoted about their common axis 6. The blocking lever 3 can be pivoted about its axis 7.

In the FIG. 1 the beginning of an opening process is shown. By pivoting the release lever 4 opposite to the clockwise direction of the blocking lever 3 has already been moved out of its blocking position. The catch 2 locks with its lever arm 8 still the catch 1. The catch 1, which introduced an opening moment in the pawl 2, so contributes to ensure that the pawl 2 is pivoted out of its locked position shown in the case of FIG. 1 by turning about the axis 6 counterclockwise. If this mechanism fails, then contacted by further pivoting of the release lever 4 counterclockwise, the driver 9, which extends from a lever arm 10 of the release lever 4 upwards, finally the lever arm 11 of the pawl 2 and then pivots it also opposite to the clockwise direction. By this additional mechanism, the lever arm 8 can be moved out of its rest position if necessary, when the moving out has failed by introducing a sufficiently large torque in the pawl 2.

As long as the release lever 4 has not been operated, ie in the case of FIG. 1 has been pivoted counterclockwise, is a spring arm 12 of a leg spring 13 on the lever arm 11 of the pawl 2, whereby the pawl 2 in the clockwise direction in its rest position can be pivoted. By pressing the release lever 4, ie by pivoting counterclockwise, finally, the lever arm 10 of the release lever 4 abuts against the spring arm 12 and pushes it away from the lever arm 11 of the pawl 2. The leg spring 13 then exerts no more force on the lever arm 11 of the pawl 2. It thus eliminates the spring force which is able to move the pawl 2 in the direction of detent position. It is therefore sufficient now a relatively small torque which must be introduced through the catch 1 in the pawl 2 to pivot the lever arm 8 from its rest position out.

In order at any time to be able to initiate an opening moment in the pawl 2, if these are in their in the FIG. 1 is shown detent position, the catch 1 by a prestressed leg spring with her in the FIG. 1 visible spring arm 14 is pressed in the direction of the open position. The catch can due to the spring with the spring arm 14 in the case of FIG. 1 counterclockwise in the direction of opening position to be rotated about its axis 5.

To operate the release lever, so this in the case of FIG. 1 to pivot counterclockwise, an operation of a handle on the lever 15 of the trigger lever 4 is suitably transmitted, for example by means of a Bowden cable, a rod or a linkage.

A stop 16 limits pivoting movements of the lever arms 10 and 11 of the pawl 2 and the release lever 4 in a clockwise direction. Trigger lever 4 and pawl 2 can therefore not be moved beyond a correspondingly provided end position addition. Therefore, the pawl 2 can be moved into its locked position, but not beyond. Also, the pivoting in the clockwise direction of the release lever 4 is suitably limited, so that a short actuation of a handle is sufficient to unlock the locking mechanism or to open. A stop 17 serves on the one hand to hold a spring leg 18, which belongs to a leg spring, which is able to pivot the blocking lever 3 in its blocking position opposite to the clockwise direction. The stop 17 limits the pivoting of the blocking lever 3 opposite to the clockwise direction, so that the blocking lever 3 can not be pivoted beyond its blocking position. In particular, the pivoting of the lever arm 25 of the release lever 3 is limited. A stop 19 serves to hold the spring arm 14 and optionally as a stop for the rotary latch 1, to suitably limit a rotational movement of the rotary latch 1 in the clockwise direction.

Will that be in the FIG. 1 installed lock shown, so is the catch 1 above. This corresponds to a 90 degree rotation of the FIG. 1 opposite to the clockwise direction.

In the FIG. 2 the locking will be according to FIG. 1 shown from the back. Visible is now a bolt 20 which projects in the direction of the blocking lever arm 21 of the trigger lever 3 and serves as a driver for this blocking lever arm 21. If the release lever 4 is actuated, then the lever arm 22 finally detects the corresponding projecting pin 20 and pivots it and thus also the blocking lever 3 in such a way that it leaves its blocking position.

In the figures, an optionally provided, preferably made of plastic inlet buffer 26 is provided for the locking pin 27 to prevent creaking noises as shown. A plastic sheath 28 of the catch dampens noise during opening and closing. The catch may include a protruding pin 29, which can serve to lock the locking mechanism in the pre-rest when the locking mechanism a pre-locking pawl in a plane above the in FIG. 1 shown pawl 2 comprises.

Will the FIG. 2 rotated by 90 degrees clockwise, this reflects the installation situation.

LIST OF REFERENCE NUMBERS

1:

catch

2:

pawl

3:

blocking lever

4:

sear

5:

Rotary latch axis

6:

common axis of pawl and release lever

7:

Blocking lever axis

8th:

latching lever arm of the pawl

9:

Auslösehebelmitnehmer

10:

Lever arm of the release lever

11:

Lever arm of the pawl

12:

spring arm

13:

Leg spring

14:

spring arm

15:

Stimulus lever arm of the trigger lever

16:

Stop for pawl and release lever

17:

Stop for blocking lever

18:

spring arm

19:

attack

20:

bolt

21:

blocking lever arm

22:

unlocking lever arm of the release lever

23:

Leg spring for blocking lever

24:

Leg spring for catch

25:

Lever arm of the blocking lever

26:

Infeed buffer for locking bolts

27:

Locking pin, lock holder

28:

Plastic sheathing

29:

protruding bolt of the rotary latch

Claims (12)

1. Lock for a door or flap with a locking mechanism having a catch (1) and at least one pawl (2) for latching the catch (1), with a spring (13) for moving the pawl (2) in direction of its latching position and a release lever (4), by which the latched locking mechanism can be released by actuating the release lever (4), wherein the release lever (4) is designed such that its actuation reduces or eliminates the spring force, which acts on the pawl (2), characterized in that the spring (13) allows lying against a lever arm (11) of the pawl (2) for moving the pawl (2) in direction of latching position and/or against a lever arm (10) of the release lever (4) for reducing or eliminating of the spring force that acts on the pawl.
2. Lock according to the preceding claim, characterized in that the in the preceding claim mentioned lever arm (11) of the pawl (2) and the in the preceding claim mentioned lever arm (10) of the release lever (4) are arranged over each other in a latched condition of the locking mechanism.
3. Lock according to claim 1, characterized in that the pawl (1) and the release lever (4) are pivotable mounted on a common axis (6).
4. Lock according to one of the preceding claims, characterized in that the catch (1) allows inducing an opening moment of force into the pawl (2) in order to move the pawl (2) out of its latching position.
5. Lock according to one of the preceding claims, characterized by a cam (9), which allows to move the pawl (2) additionally out of its latching position, specifically particularly in a deferred manner.
6. Lock according to one of the preceding claims, characterized by a blocking lever (3), which allows to block the pawl (2) in its latching position.
7. Lock according to the preceding claim, characterized in that the release lever (4) allows to move the blocking lever (3) out of its blocking position.
8. Lock according to one of the two preceding claims, characterized by a spring (23) for moving the blocking lever (3) in its blocking position.
9. Lock according to one of the preceding claims, characterized by a spring (24) for moving the catch (1) in its opening position.
10. Lock according to one of the preceding claims, characterized in that the release lever (4) comprises three lever arms (10, 15, 22).
11. Lock according to one of the preceding claims, characterized in that the pawl (2) comprises two lever arms (8, 11).
12. Lock according to one of the preceding claims, characterized by a blocking lever (3) with two lever arms (21, 25).

Images