EP3686384B1 - Door lock for a door, in particular a washing machine - Google Patents

Description

The invention relates to a door locking device for a door, in particular for a door of a washing machine, with a pivotable rotary latch for a door hook, the pivotable rotary latch being arranged on a pivoting body, the rotary latch having a recess for receiving a locking body for the rotary latch, with a locking body is provided for locking the rotary latch in its closed position, the locking body being connected to an armature, the armature being surrounded by a coil that can be energized and when the coil is energized, the armature and the locking body can be moved linearly or are moved in the closed position of the rotary latch, so that the locking body is arranged or can be arranged in a blocking position in the recess of the rotary latch. The invention also relates to a use of the door locking device.

It is known in the prior art that a rotary latch is used to lock a door or flap or the like in order to hold the door or flap in a closed position. The rotary latch has a recess which, in the closed position, accommodates a locking bolt or striker during the closing movement of the door, the rotary latch being pivoted for locking in a locking position such that the movement of the locking bolt or striker is blocked. In order to hold the rotary latch in the locking position, a pawl or the like is provided in order to prevent the pivoting of the rotary latch into the unlocked position releasing the locking bolt or locking bracket.

For example, in DE 40 31 077 A1 disclosed an electromagnetic door lock with a rotary latch.

In addition, DE 198 28 830 A1 a washing machine is known which has a door and a closure which has an electromagnetic opening device and an emergency release device which can be actuated via a pulling device. Furthermore, in DE 198 48 275 A1 a device for locking a door of a household appliance, in particular a washing machine, is described.

In DE DE 2 029 262 A1 discloses a closure for washing machines, the closure having a fork latch. Also shows US 9,267,315 B2 a door safety lock with a rotary latch, wherein in the closed position of a rotary latch a stopper pin is arranged behind a flank of the rotary latch by a laterally arranged magnetic drive.

In addition revealed DE 10 2017 128 301 B3 a locking device for washing machines with a linearly movable locking pin and a linearly movable plunger for the locking pin, wherein the plunger is connected to the locking pin by means of a tensioning device in the form of springs.

The object of the invention is to provide a simply constructed and inexpensive door lock, in particular for a washing machine.

This object is achieved by a door locking device for a door, in particular for a door of a washing machine, with a pivotable rotary latch for a door hook, the pivotable rotary latch being arranged on a pivoting body, the rotary latch having a recess for receiving a locking body for the rotary latch, wherein a locking body is provided for locking the rotary latch in its closed position, wherein the locking body is connected to an armature, the armature is surrounded by a coil that can be energized and when the coil is energized, the armature and the locking body can be moved or moved linearly in the closed position of the rotary latch so that the locking body is or can be arranged in a locking position in the recess of the rotary latch, the anchor being connected to a locking clamping mechanism for the locking body using a plunger, which is further developed in that the locking clamping mechanism has a crown connected to the plunger and a turning crown cooperating with the crown and connected to the latch body.

The invention is based on the idea that when energized a The coil surrounded by the coil armature is linearly movable, wherein the armature is moved to its rest position by means of a spring when not energized or is movable. An actuator is provided or formed by means of the armature and the coil, wherein it is not necessary to switch over a power source for the coil in order to lock and unlock the door, for example of a washing machine. This achieves a simple structure, for example, because compared to the prior art, in which complex and expensive reversing magnets are used for locking mechanisms for washing machines, the locking mechanism or door locking device according to the invention is designed without yokes and without permanent magnets. In addition, the door locking device advantageously has only one coil for the armature to be moved.

In addition, a development of the door locking device is characterized in that an armature spring is provided for the armature, with the armature spring in particular being set up to hold the armature in a rest position when the coil is not energized and to counteract the linear movement of the armature when the coil is energized .

The door locking device provides for the armature to be connected to a clamping mechanism for the locking body using a plunger. The tensioning mechanism is set up in such a way that when the coil is energized by means of the armature of the door locking device that is moved as a result, the locking body is moved into a locked position and is positioned or held in the locking position by means of the tensioning mechanism, even if the coil is not after the linear movement of the armature is or is more energized. To move the locking body from its locked position in which the catch is locked and not is to be removed, after a phase in which the coil is not energized, the coil is energized again in order to move the linearly movable armature, so that the locking body is brought from its closed position, held by the locking clamping mechanism, into an unlocked position, with the holding position or the locking position of the locking body is released by the locking clamping mechanism. For this purpose, it is provided according to the invention that the locking mechanism has a crown connected to the plunger and a rotary crown that interacts with the crown and is connected or interacts with the locking body.

In addition, according to a further aspect of the invention, it is provided that the plunger and/or the locking mechanism, in particular the crown and the rotary crown of the locking mechanism, are accommodated in a guide tube. This results in improved guidance of the ram and the locking mechanism, in particular the crown and the rotating crown inside the guide tube.

Furthermore, an embodiment of the door locking device is characterized in that to unlock the locked position of the locking body by further energizing the coil, the armature can be moved linearly or is moved, so that the locking body is moved out of the locked position.

An unlocking spring acting on the locking body is advantageously provided, the unlocking spring being set up to press the locking body into an unlocking position or rest position.

In order, for example, to keep a door of a washing machine permanently under pretension via the door hook, it is inventive provided that the rotary latch is biased by means of a spring provided on the swivel body in the closed position of the rotary latch. A preload is brought about by means of the spring, as a result of which the door or the lid, for example of a washing machine, is pressed into a seal of the door opening. In the event of aging or shrinkage of the seal, the spring or the spring mechanism advantageously continues to press the door into the seal with a constant force, as a result of which the sealing force is kept constant for a long time.

For this purpose, one embodiment provides that the spring of the pivoting body for the rotary latch is arranged between two spaced-apart holding pieces, with a first holding piece being rotatably connected to the rotary latch and the second holding piece being pivotably mounted about a pivot axis. The pivot axis of the rotary latch and the pivot axis of the pivot body are preferably aligned parallel to one another.

In addition, the armature is advantageously made of a soft magnetic material.

Furthermore, an embodiment of the door locking device is characterized in that an emergency release body that can be actuated manually is provided on the anchor. By means of the manually operable emergency release body, it is possible to move the armature linearly when the coil is not energized, for example in order to remove the locking body from the locked position in the recess of the rotary latch.

In addition, it is provided that the door locking device is arranged in a housing, which simplifies installation of the door locking device, for example in a washing machine, yields.

In addition, the object is achieved by using a door locking device described above for a door in a washing machine or a household appliance. In the context of the invention, a door is also understood to mean a cover or a flap of a washing machine, which can also be locked in a corresponding manner by means of the locking device.

Further features of the invention will be apparent from the description of embodiments of the invention taken together with the claims and the accompanying drawings. Embodiments according to the invention can fulfill individual features or a combination of several features.

In the context of the invention, features that are marked with "particularly" or "preferably" are to be understood as optional features.

Fig. 1

schematisch eine Ansicht einer Verriegelungseinrichtung in einer perspektivischen Ansicht;

Fig. 2

schematisch einen Querschnitt durch die Türverriegelungseinrichtung aus Fig. 1;

Fig. 3a, 3b

schematisch eine vereinfachte Darstellung der Drehfalle der Türverriegelungseinrichtung in einer verriegelten Position und in einer entriegelten Position.

The invention is described below without restricting the general inventive concept using exemplary embodiments with reference to the drawings, with express reference being made to the drawings with regard to all details according to the invention that are not explained in more detail in the text. Show it:

1

schematically a view of a locking device in a perspective view;

2

schematically shows a cross section through the door locking device 1 ;

Figures 3a, 3b

schematically shows a simplified representation of the rotary latch of the door locking device in a locked position and in an unlocked position.

In the drawings, elements and/or parts that are the same or of the same type are provided with the same reference numbers, so that they are not presented again in each case.

In 1 a perspective view of a door locking device 10 is shown schematically. In 2 a cross section through the door locking device 10 is shown schematically. The door locking device 10 can be part of a washing machine. The door locking device 10 serves to lock a door or a cover that is connected to a door hook 60 .

The door locking device 10 has a housing 12 . A coil 14 which can be energized and which surrounds an armature 16 which can be moved linearly is provided in the interior of the housing 12 . The energizable coil 14 is connected to a switchable current source, not shown here.

The armature 16 is preferably made of a soft magnetic material. On one side of the anchor 16, in 2 A compression spring 18 is arranged on its underside in order to hold the armature 16 in its rest position when the coil 14 cannot be energized. The compression spring 18 is designed, for example, as a spiral spring or the like. Also connected to the armature 16 on the side of the armature 16 facing away from the compression spring 18 is an emergency release button or emergency release body 20 which is arranged in an opening of the housing 12 when the armature 16 is in the rest position. The manually operable emergency release body 20 can also be in one Configuration protrude from the housing 12.

Furthermore, the armature 16 , which can be moved linearly when the coil 14 is energized, is connected to a locking clamping mechanism 24 via a plunger 22 . Here, the locking mechanism 24 comprises a crown 26 which is connected to the plunger 22 and which interacts with a rotary crown 28 arranged on the crown 26 . In this case, the crown 26 and the rotary crown 28 each have serrated end faces which face one another and which can interlock with one another.

The ram 22 and the clamping mechanism 24 are arranged inside a guide tube 30 , the inside of the guide tube 30 having grooves for outer bodies arranged on the outside of the rotating crown 28 in the region of the rotating crown 28 . The grooves of the guide tube 30 and the outer body of the rotary crown 28 work together here. The grooves on the inside of the guide tube 30 in the region of the rotary crown 28 are arranged in the circumferential direction, with the grooves for the outer body of the rotary crown 28 alternatingly having different depths in the circumferential direction. The outer bodies of the rotary crown 28 are guided along the longitudinal extent of the guide tube 30 in the grooves of the guide tube 30 .

On the side of the rotating crown 28 facing away from the crown 26 , the rotating crown 28 is in contact or connected to a locking body 32 . The locking body 32 is surrounded at the end by a holding body 34 . On the outside of the locking body 32 this is surrounded by an unlocking spring 36 which is supported on the holder or on the holding body 34 .

A pivotable rotary latch 40 is arranged opposite the locking body 32 on its underside is connected to a pivotable pivoting body 42 on the side of the rotary latch 40 facing away from the locking body. The pivoting body 42 consists of two holding pieces 44, 46, between which a spring 48 is arranged in order to push the holding pieces 44, 46 apart.

In Figures 3a, 3b the area between the rotary latch 40 and the locking body 32 is shown schematically in each case, with FIG Figure 3a the rotary latch 40 in its closed position and the locking body 32 in the locked position or in a locking position and in Figure 3b the rotary latch 40 is arranged in an open position and the locking body 32 is in a rest position or in an unlocked position. The rotary latch 40 has a U-shaped recess 50 in which a cross brace 62 of a door hook 60 (cf. 1 ), for example a door of a washing machine. On the upper side of the rotary latch 40, which faces the locking body 32, the rotary latch 40 has a recess 52 in which the free end of the locking body 32 is arranged when the rotary latch 40 is in the closed position (cf. Figure 3a ) to lock the rotary latch 40.

In 1 the door hook 60, which has a cross brace 62, is shown schematically, the in 1 shown door locking device 10 is in the closed position. In the closed position of the rotary latch 40, the cross brace 62 of the door hook 60 is arranged or accommodated in the recess 50 of the rotary latch 40 (cf. Figure 3a ). In the unlocked state (cf. Figure 3b ) is the rotary latch 40 via the spring 48, which is preferably designed as a full detent spring, biased, so that the rotary latch 40 remains securely in the open state. When closing a door, for example a washing machine, the door hook 60 is moved in the direction of the catch 40, so that the cross brace 62 in the recess 50 of the rotary latch 40 is positioned, whereby the door hook 60 rotates the rotary latch 40 when the door is closed. The spring 48 tensions the rotary latch 40 so that the rotary latch 40 pulls the door hook 60 in the direction of the entire door locking device 10 . As a result, a high sealing force of the held door is achieved.

In order to lock the door, in the locking position of the door hook 60 (cf. Figure 3a ) the coil 14 is energized, so that the linearly movable armature 16 moves against the compression spring 18 and against the unlocking spring 36 and thereby the plunger 22 connected to the armature 16, the crown 26, the rotary crown 28 and the locking body 32 in the direction of the rotary latch 40 and the locking body 32 is arranged with its free end in the recess 52 of the catch 40 . If the coil 14 is then no longer energized, the armature 16 is moved back together with the plunger 22 and the crown 26 by means of the spring or compression spring 18 . Here, the rotary crown 28 remains in the position together with the locking body 32 and is held in this position by means of the locking clamping mechanism 24 in order to lock the rotary latch 40 . Then, when coil 14 is energized further, armature 16 is moved together with plunger 22 and crown 26 in the direction of rotary latch 40, which releases the holding position of clamping mechanism 24 for locking body 32, so that locking body 32 can be released by unlocking spring 36 the catch 40 releases. By releasing the door hook 60, the door hook 60 can then be removed from the recess 50 of the rotary latch 40 after rotating the rotary latch 40 (cf. Figure 3b ).

Reference List

10

door locking device

12

Housing

14

Kitchen sink

16

anchor

18

compression spring

20

emergency release body

22

pestle

24

locking tension mechanism

26

Crown

28

turning crown

30

guide tube

32

locking body

34

holding body

36

release spring

40

rotary latch

42

swivel body

44

holding piece

46

holding piece

48

Feather

50

recess

52

recess

60

door hook

62

cross brace

Claims (10)

1. A door locking device (10) for a door, in particular for a door of a washing machine, having a pivotable rotary catch (40) for a door hook (60), wherein the pivotable rotary catch (40) is arranged on a pivoting body (42), wherein the rotary catch (40) has a recess (52) for receiving a locking body (32) for the rotary catch (40), wherein a locking body (32) for locking the rotary catch (40) is provided in the closed position thereof, wherein the locking body (32) is connected to an armature (16), wherein the armature (16) is surrounded by a coil (14) which can be energized and when the coil (14) is energized, the armature (16) and the locking body (32) can be or are linearly moved into the closed position of the rotary catch (40) such that the locking body (32) is or can be arranged in a blocked position in the recess (52) of the rotary catch (40), characterized in that the armature (16) is connected to a blocking clamping mechanism (24) for the locking body (32) using a tappet (22) and that the blocking clamping mechanism (24) has a crown (26) connected to the tappet (22) and a rotary crown (28) interacting with the crown (26) and connected to the locking body (32).
2. The door locking device (10) according to Claim 1, characterized in that a compression spring (18) is provided for the armature (16), wherein in particular the compression spring (18) is designed, when the coil (14) is not energized, to hold the armature (16) in a rest position and, when the coil (14) is energized, to counteract the linear movement of the armature (16).
3. The door locking device (10) according to Claim 1 or 2, characterized in that the tappet (22) and/or the blocking clamping mechanism (24), in particular the crown (26) and the rotary crown (28) of the blocking clamping mechanism (24), are received in a guide tube (30).
4. The door locking device (10) according to any one of Claims 1 to 3, characterized in that in order to unlock the blocked position of the locking body (32) by a further energization of the coil (14) the armature (16) can be or is linearly moved such that the locking body (32) is moved out of the blocked position.
5. The door locking device (10) according to any one of Claims 1 to 4, characterized in that an unlocking spring (36) acting on the locking body (32) is provided, wherein the unlocking spring (36) is designed to press the locking body (32) into an unblocked position.
6. The door locking device (10) according to any one of Claims 1 to 5, characterized in that the rotary catch (40) is pretensioned in the closed position of the rotary catch (40) by means of a spring (48) provided on the pivoting body (42).
7. The door locking device (10) according to Claim 6, characterized in that the spring (48) of the pivoting body (42) for the rotary catch (40) is arranged between two holding pieces (44, 46) spaced apart from one another, wherein a first holding piece (44) is rotatably connected to the rotary catch (40) and the second holding piece (46) is pivotably mounted about a pivoting axis.
8. The door locking device (10) according to any one of Claims 1 to 7, characterized in that the armature (16) is manufactured from a magnetically soft material.
9. The door locking device (10) according to any one of Claims 1 to 7, characterized in that an emergency unlocking body (20) which can be operated manually is provided on the armature (16).
10. Use of a door locking device (10) for a door according to any one of Claims 1 to 9 in a washing machine.

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