EP2675976B1 - Lock for a flap or 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 locking mechanism is attached to a usually made of metal lock plate or a usually 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 invention particularly relates to a lock with a pawl for the position of the main catch of the catch (hereinafter called "main catch pawl"), a pawl for the position Vorrast the catch (hereinafter called "pre-locking pawl") and a blocking lever for said main catch - pawl. Such a lock is from the document DE 10 2007 003 948 A1 known.

The catch of the out of the DE 10 2007 003 948 A1 known motor vehicle lock has a fork-shaped inlet slot into which a locking bolt of a vehicle door or a vehicle door, when the vehicle door or vehicle door is closed. The locking pin then rotates the catch from an open position to a closed position. If the catch has reached a closed position, so the locking pin can not leave the inlet slot of the catch. In the closed position, the pawl locks the catch, so that it can not be rotated back into the open position. The lock is then in a locked position or position.

That from the DE 10 2007 003 948 A1 known lock comprises two grate positions, which can be taken in succession during the closing of the rotary latch, namely the so-called pre-locking position of the rotary latch and the so-called main catch position of the rotary latch.

In order to avoid that a pawl is not moved unplanned out of its detent position, a blocking lever may be provided which blocks such movement when the catch is locked. Such a blocking lever is in the from the publication DE 10 2007 003 948 A1 known lock for the main catch pawl required because the catch and the main catch pawl are designed so that in the position of the main catch, the catch in the main catch pawl is able to initiate an opening moment.

The aforementioned features already known from the prior art can be combined individually or in any combination with the subject matter of the present invention.

From the publication US 4,971,373 It is known to bias a pawl by a first spring to move the pawl by means of spring force into its detent position. A second spring for the latch is not in the detent position on the pawl. By the second spring opening noise can be avoided.

In a lock of the type mentioned so there are components such as pawl, blockage lever or rotary latch, which can and should be pivoted. There is usually at least one preloaded 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 detent position, of moving a blocking lever into its blocking position or of turning a catch into its open position DE 10 2007 003 948 A1 a spring-loaded rotary latch known So a catch that can be pivoted by means of spring force of the associated spring.

It is an object of the invention to further develop a lock of the type mentioned.

The object of the invention is achieved by a lock with the features of the first claim. Advantageous embodiments emerge from the subclaims.

To achieve the object, a lock for a door or flap is provided with a catch of rotary latch and at least one pawl and a spring. The spring can pivot a pivotable component of the lock by spring force from a starting position in the direction of an end position. In the end position, however, no spring force acts on the pivotable component. The pivotable component thus falls without the pressure of the spring in the end position. As a result, a significant reduction in noise is achieved in comparison to the case that the pressure of the spring acts on the pivotable component up to the end position.

The spring load of the pivotable component preferably ends shortly before reaching the end position. It is thus ensured in a particularly reliable manner that the pivotable component reaches its end position. This is to be understood that the pivotable component from reaching a no longer spring-loaded position only has to be rotated by a few degrees in order to reach the end position. In particular, the component then only has to travel a short distance without the assistance of the spring force. In one embodiment, then the component must be rotated by not more than 5 °, preferably not more than 3 °, more preferably not more than 1 ° to reach the end position without acting spring force.

So that no spring force acts more on the pivotable component in the end position, the spring may be correspondingly weak in the starting position before tensioned. In one embodiment, however, the lock advantageously comprises a stop for the spring. The stop causes in the end position and preferably also shortly before no spring force of the spring acts on the pivotable component. In this embodiment, it is possible to bias the spring in a freely selectable manner. The bias of the spring can thus be chosen so that the pivotable component is pivoted at a desired speed and / or with a sufficient force. In addition, it can be ensured by the stop that under no circumstances acts a spring force in the end position on the pivotable component. The pivotable component is therefore not spring-loaded in the end position, even if the spring was relatively strongly biased, inter alia, in the starting position.

The stop is expediently attached to a lock housing, a lock case or a lock plate of the lock. Preferably, the stopper is part of the lock housing, part of the lock case or part of the lock plate. The stop is then made in one piece with the lock housing, the lock case or the lock plate. This minimizes the number of parts to be produced.

The pivotable component may be a pawl and / or a blocking lever. The respective component is then spring loaded in the initial position, but not in the end position. In the end position, therefore, the spring force does not affect the pivotable component. If the pivotable component is a pawl, then opening forces that have to be expended in order to move the pawl out of its rest position are reduced. It is thus achieved in this case, in addition to a significant noise reduction, another advantage.

Hereinafter, a preferred embodiment of the invention shown in the figures will be explained in more detail. On the basis of the embodiment advantages of further embodiments of the invention are illustrated.

• Fig. 1: Gesperre in der Position Hauptrast der Drehfalle
• Fig. 2: Gesperre in der Position Hauptrast der Drehfalle
• Fig. 3: Gesperre in der geöffneten Stellung
• Fig. 4: Gesperre in einer Zwischenstellung
• Fig. 5: Ausschnitt in geöffneter Stellung
• Fig. 6: Ausschnitt in Position Hauptrast der Drehfalle

Show it:

• Fig. 1 : Ratchet in the position of the main catch of the rotary latch
• Fig. 2 : Ratchet in the position of the main catch of the rotary latch
• Fig. 3 : Lock in the open position
• Fig. 4 : Lock in an intermediate position
• Fig. 5 : Cutout in open position
• Fig. 6 : Cutting in position of main catch of rotary latch

In the FIG. 1 is a plan view of a wall 1 of a vehicle lock shown. The wall 1 may be a lock plate or part of a lock case. The wall 1 is preferably made of metal. The wall 1 is provided with an inlet slot 2 into which a locking bolt 3 of a vehicle door or a vehicle door enters when the associated vehicle door or vehicle door is closed. A rotary latch 4 is pivotally mounted on the wall 1 and can be rotated about its mounting axis 5. In the FIG. 1 the position of the main catch of the rotary latch is shown, in which the locking pin 3 located in the wall inlet slot 2 is enclosed by the inlet slot of the rotary latch so that the locking pin 3 can not be moved out of the wall inlet slot 2. The corresponding door or the flap of the vehicle is thus closed by the latching of the pawl in the main catch position of the catch. Shown is the position main rest, because a turning back of the catch according to the arrow direction shown 11 in the open position by the pivotally mounted main locking - pawl 6 is prevented as shown. The main catch pawl 6 is also on the wall 1 attached and can be rotated about its mounting axis 7. The catch is preferably by a in the FIG. 1 spring not shown biased towards the open position. Due to this bias the rotary latch presses against a stop of the main catch - pawl with an oblique course. This oblique course presses the main catch - pawl 6 out of the detent position. It is thus introduced such an opening moment in the main catch pawl 6.

If the rotary latch 4 is not biased by a spring, at least the locking bolt 3 causes a rotary movement of the rotary latch 4 in the direction of the open position according to arrow 11 when an associated vehicle door or vehicle door is opened. The associated torque then pushes the main catch pawl 6 out of the detent position.

However, this is prevented in the position of the main catch of the rotary latch when the vehicle door or vehicle door is closed by a pivotally mounted blocking lever 8 as shown. The blocking lever 8 is also pivotally mounted on the wall 1 and can be rotated about its mounting axis 9. At a lateral contour region of the blocking lever 8 is an arm 10b of a spring 10 at. The spring 10 is biased so that the arm 10b of the spring 10 pushes the blocking lever 8 in the direction of the blockage position shown. The rotational movement of the blocking lever caused thereby is limited, as shown, by a stop 12, which is fastened to the wall 1 in the form of a protruding bolt.

In the case of FIG. 1 A pivotable pre - locking pawl 13 is disposed above the main catch pawl 6, which is shown transparent to allow the view of the underlying components. The pre-locking pawl 13 is also rotatably mounted on the axis 7 and thus can be rotated about this axis 7. The outline of the pre-locking pawl 13 is shown in dotted. The Vorrast - Pawl 13 includes one in the case of FIG. 1 also transparent daretseten bolt 14, which extends from the pre-locking pawl 13 in the direction of the wall 1 down. At this bolt 14, which is attached to the pre-locking pawl, the other arm 10a of the spring 10 abuts. In the position of the main catch of the rotary latch, the bolt 14 also bears against a lateral contour area of the blocking lever 8. If the pre-locking pawl 13 is rotated by operating the lever arm 21 in the direction of the arrow 16, the bolt 14 causes the blocking lever 8 is rotated out of the blocking position. If the blocking lever 8 is moved out of the blocking position, the main locking pawl 6 is pushed out of its shown locking position by the rotary catch 4. Additionally or alternatively detects a lateral contour portion of the pre-locking pawl 13 as a result of said rotational movement a protruding serving as a stop pin 17 which is mounted on the main catch pawl 6. This has the consequence that the main catch pawl 6 is rotated out of the detent position shown and releases the catch. This then pivots in the direction of the arrow 11 in the direction of the open position and finally releases the locking pin 3. The associated door or flap can then be opened.

The pre-locking pawl 13 can also lock the catch 4 when a protruding pin 18 of the catch 2 impinges on the lateral locking surface 19 of the pre-locking pawl 13 and thus prevents rotation of the pawl in the open position according to arrow 11. The pre-locking pawl 13 is preferably biased by a spring, not shown, in the direction of its detent position, ie as the blocking lever spring-loaded. A serving as a stopper protruding pin 20 which is mounted on the wall 1, prevents further rotation of the pre-locking pawl beyond its detent position.

The castle according to the FIG. 1 comprises a prestressed spring 23, with which the main-locking pawl 6 from its non-latching position, So from their initial position towards the end position, ie in the direction of their in the FIG. 1 shown detent position can be moved. The main catch pawl 6 is in the in FIG. 1 shown locking position, but in its end position, however, not spring-loaded, as this is prevented by the stop 24 for the spring arm 23a of the spring 23. The spring 23, the stop 24 and a stop for the other arm of the spring 23 are preferably attached to a particular plastic housing lock housing, which is not shown in the figure 1, since this would then hide the view of the components shown.

The invention also includes the case that the pivotable component which is not spring-loaded in its end position, so in the present case, the main catch pawl 6 can be pivoted in addition by other components. In the present case, such supplementary pivoting can be assisted, for example, by a rotational movement of the blocking lever 8 into the blocking position. However, such additional pivoting is not absolutely necessary. The kinetic energy generated by the pivoting by means of spring force is sufficient to move the pivotable component to the end position, although the pivotable component is no longer spring-loaded in its end position. The spring 23 is preferably held by a mandrel 22, which is part of a plastic housing of the lock housing, that is, has been made in one piece with the lock housing.

In the FIG. 2 the castle will be off FIG. 1 shown. However, the pre-locking pawl 13 is now not transparent. This therefore partially covers, inter alia, the main catch pawl 13 and partially the spring arm 23a of the spring 23rd

In the FIG. 3 is the position of the rotary latch 4, the main latch pawl 6, the blocking lever 8, the spring 23, the spring 10 and the locking bolt 3 illustrated in the open position. In addition, the position of the pre-locking pawl 13 is sketched by a transparent representation. The locking pin 3 can now be moved out of the inlet slot 2 and the associated door or flap to be opened. The spring arm 23a has now been moved by the pivoting of the main-locking pawl 6 away from the stop 24 in the direction of the other spring arm 23b. As a result, the bias of the spring 23 has been increased. In this initial position, the spring 23 can now rotate by spring force the main catch - pawl 6 in the detent position. In the in the FIG. 3 shown open position so the main catch - pawl 6 is spring loaded by the spring 23.

In the FIG. 4 an intermediate position between the open position and the main catch position of the rotary latch 4 is shown. If the rotary latch 4 is further rotated by the bolt 3 in the direction of the main catch position, the pre-locking pawl 13, which is shown transparently, can first latch into its locking position. In this in the FIG. 4 shown intermediate position, the main catch pawl 6 is still spring loaded by the spring 23.

Preferably, the main catch pawl 6 is still spring loaded even when the position is reached Vorrast. If the rotary latch 4 is rotated from the position Vorrast in the position of the main load, so this spring load is sufficient to move the main catch - pawl 6 in its locked position into it.

The FIG. 5 shows an enlarged view of the castle in the open position fragmentary and although seen in contrast to the preceding figures of the lock plate or the lock case of the castle. The FIG. 5 illustrates that the bearing mandrel 22 is integrally connected to the lock housing 25. The bearing mandrel 22 comprises two projecting lugs 22 a, which prevent the spring 23 from slipping out of the bearing mandrel 22. The projecting lugs 22 a are designed in such a ramp shape that the spring 23 through Touching and pressing can get into the mounted position shown. A lateral wall of the lock housing 25 has a projection 25a, which helps to keep the spring 23 in the desired position. The corresponding lateral wall also serves as a stop for the spring arm 23b, so that it remains permanently in the position shown. The stop 24 has a boom 24a, which is always above the spring arm 23a from the viewpoint of the lock case or the lock housing. The boom 24a also ensures that the spring arm 23a is held in the desired plane. The prestressed arm 23a of the spring 23 abuts against the main catch pawl 6. The main catch - pawl 6 is therefore spring loaded in this initial position.

In the FIG. 6 the clip will be off FIG. 5 shown in the position of the main catch of the rotary latch. The spring arm 23 a abuts against the stop 24, without touching the main locking pawl 6. In the position of the main catch of the catch, the main catch pawl 6 is therefore no longer spring loaded.

LIST OF REFERENCE NUMBERS

• 1: Wall of a lock plate or a lock case
• 2: inlet slot
• 3: locking bolt
• 4: catch
• 5: fixing axis
• 6: Main ratchet pawl
• 7: fixing axis
• 8: Blockage lever
• 9: fixing axis
• 10: spring
• 10b: spring arm
• 10b: spring arm
• 11: opening direction
• 12: stop
• 13: Pre-ratchet pawl
• 14: bolts
• 16: direction of rotation
• 17: bolts
• 18: bolts
• 19: Locking surface of the pre-locking pawl
• 21: Lever arm of the pre-locking pawl
• 20: bolts
• 22: thorn
• 22a: nose
• 23: preloaded spring
• 23a: spring arm
• 23b: spring arm
• 24: stop
• 24a: boom
• 25: lock housing

Claims (10)

1. A lock for a door or a flap, comprising a locking mechanism composed of a rotary latch (4) and at least one pawl (6) and at least one spring (23) which can swivel a pivoting component of the lock from an initial position into the direction of an end position by means of spring force, characterized in that no spring force acts upon the pivoting component in the end position.
2. A lock according to the preceding claim, characterized by a stop (24) for the spring (23), which stop has the effect that no spring force of the spring (23) acts upon the pivoting component in the end position.
3. A lock according to the preceding claim, characterized in that the stop (24) is mounted on a lock housing (25), a lock case or a lock plate of the lock or is part of the lock housing (25), part of the lock case or part of the lock plate.
4. A lock according to one of the preceding claims, characterized in that the pivoting component is a pawl (6, 13) and/or a blocking lever (8).
5. A lock according to one of the preceding claims, characterized in that the lock comprises a pre-detent position of the rotary latch and a main detent position of the rotary latch (4), wherein the pivoting component is a main detent pawl (6).
6. A lock according to the preceding claim, characterized in that the main detent pawl (6) is spring-loaded in the pre-detent position of the rotary latch (4) and/or spring-loaded by the spring (23) in the open position of the locking mechanism.
7. A lock according to one of the preceding claims, characterized in that the spring (23) is held by a bearing mandrel (22) which is connected in one piece to the lock housing (25) of the lock.
8. A lock according to one of the preceding claims, characterized in that the lock comprises a main detent pawl (6) and a pre-detent pawl (13).
9. A lock according to one of the preceding claims, characterized in that the rotary latch (4) can initiate an opening momentum in the pawl (6) in the main detent position of the rotary latch (4).
10. A lock according to one of the preceding claims, characterized in that one arm (23a, 23b) of the spring (23) is held or guided by an extension arm (24a) of a stop (24) for the spring (23) or by a projection (25a) of a lock housing (25) of the lock.

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