EP3686384A1 - Door lock for a door, in particular a washing machine - Google Patents

Abstract

The invention relates inter alia to a door locking device (10) for a door, in particular for a door of a washing machine, with a pivotable rotary latch (40) for a door hook (60), the pivotable rotary latch (40) being arranged on a pivot body (42), wherein the rotary latch (40) has a recess (52) for receiving a locking body (32) for the rotary latch (40), a locking body (32) for locking the rotary latch (40) being provided in its closed position, the locking body (32 ) is connected to an armature (16), the armature (16) being surrounded by an energizable coil (14) and, when the coil (14) is energized, the armature (16) and the locking body (32) in the closed position of the rotary latch (40 ) are or can be moved linearly, so that the locking body (32) is arranged in a locking position in the recess (52) of the rotary latch (40) or can be arranged.

Description

The invention relates to a door locking device for a door, in particular for a door of a washing machine, and the use thereof.

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 in the closed position which receives a locking bolt or locking bracket during the closing movement of the door, the rotary latch being pivoted in a locking position so that the locking bolt or locking bracket is blocked in its movement. In order to keep the rotary latch in the locking position, a pawl or the like is provided in order to pivot the rotary latch into the unlocking position releasing the locking bolt or locking bracket to prevent.

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

In addition, in DE 198 28 830 A1 a washing machine is known which has a door and a lock, which has an electromagnetic opening device and an emergency release device to be operated 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, described.

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 swivel 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, the locking body being connected to an armature, the armature being surrounded by an energizable coil 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 are so that the locking body is arranged in a locking position in the recess of the rotary latch or can be arranged.

The invention is based on the idea that when energized one The armature surrounded by the coil is linearly movable, the armature being moved or being movable into its rest position by means of a spring when no current is supplied. An actuator is provided or formed by means of the armature and the coil, it not being necessary to switch over a current source for the coil to lock and unlock the door, for example a washing machine. In this way, for example, a simple structure is achieved, since, in contrast to the prior art, in which complex and expensive reversing magnets are used for locking devices for washing machines, training in the locking device or door locking device according to the invention is achieved 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 further development of the door locking device is characterized in that an armature spring is provided for the armature, the armature spring in particular being designed 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 .

According to one embodiment of the door locking device, it is preferably provided that the armature is connected to a tensioning mechanism for the locking body using a plunger. Here, 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 thereby moved, the locking body is moved into a locking position and is positioned or held in the locking position by means of the tensioning mechanism, even if the coil does not move after the linear movement of the armature is or is more energized. To the locking body from its locked position in which the If the catch is locked and cannot be moved, after a phase of de-energization of the coil, 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 mechanism to an unlocked position, at the same time the holding position or the locking position of the locking body is released by the locking mechanism. For this purpose, in a further development it is provided that the locking mechanism has a crown connected to the tappet and a rotating crown which interacts with the crown and is connected to or interacts with the locking body.

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

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

For example, in order to keep a door of a washing machine under the pretension permanently under the door hook, the invention provided that the rotary latch is biased in the closed position of the rotary latch by means of a spring provided on the swivel body. A preload is brought about by means of the spring, as a result of which the door or the cover, for example a washing machine, is pressed into a seal in the door opening. When the seal ages or shrinks, the door is advantageously pressed into the seal with a constant force via the spring or the spring mechanism, as a result of which the sealing force is kept constant for a long time.

For this purpose, in one embodiment it is provided that the spring of the swivel body for the rotary latch is arranged between two spaced-apart holding pieces, 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 a manually operated emergency unlocking body is provided on the anchor. By means of the manually operated emergency release body, it is possible to move the armature linearly when the coil is not energized, for example 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 the installation of the door locking device, for example in a Washing machine, results.

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 lid 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 become apparent from the description of embodiments according to the invention 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 which are labeled "in particular" 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 on the basis of exemplary embodiments with reference to the drawings, reference being expressly made to the drawings with regard to all details according to the invention not explained in more detail in the text. Show it:

Fig. 1

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

Fig. 2

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

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, the same or similar elements and / or parts are provided with the same reference numerals, so that a renewed presentation is not given.

In Fig. 1 a perspective view of a door locking device 10 is shown schematically. In Fig. 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 which is connected to a door hook 60.

The door locking device 10 has a housing 12. In the interior of the housing 12, an energizable coil 14 is provided, which surrounds a linearly movable armature 16. 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 Fig. 2 on its underside, a compression spring 18 is arranged to hold the armature 16 in its rest position when the coil 14 is not energized. The compression spring 18 is designed, for example, as a spiral spring or the like. On the side of the armature 16 facing away from the compression spring 18, an emergency release button or body 20 is also connected to the armature 16, which is arranged in an opening of the housing 12 in the rest position of the armature 16. The manually operated emergency release body 20 can also in one Project configuration from the housing 12.

Furthermore, the armature 16, which is linearly movable when the coil 14 is energized, is connected to a locking tensioning mechanism 24 via a plunger 22. The locking tensioning mechanism 24 in this case comprises a crown 26 connected to the plunger 22, which cooperates with a rotating crown 28 arranged on the crown 26. Here, the crown 26 and the rotating crown 28 each have serrated and mutually facing end faces which can interlock.

The plunger 22 and the locking mechanism 24 are arranged in the interior of a guide tube 30, the inside of the guide tube 30 having grooves for outer bodies arranged on the outside of the rotary crown 28 in the region of the rotary crown 28. The grooves of the guide tube 30 and the outer body of the rotating crown 28 interact here. The grooves on the inside of the guide tube 30 in the region of the rotating crown 28 are arranged in the circumferential direction, the grooves for the outer bodies of the rotating crown 28 alternately having different depths in the circumferential direction. In this case, the outer bodies of the rotating crown 28 are guided in the grooves of the guide tube 30 along the longitudinal extent of the guide tube 30.

On the side of the rotary crown 28 facing away from the crown 26, the rotary 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, the latter is surrounded by an unlocking spring 36 which is supported on the holder or on the holding body 34.

A locking pivot 40 is arranged on the underside of the locking body 32, on the underside is connected to a pivotable swivel body 42 on the side of the rotary latch 40 facing away from the locking body. The swivel body 42 here 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 3a, 3b the area between the catch 40 and the locking body 32 is shown schematically, wherein in Fig. 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 Fig. 3b the rotary latch 40 are arranged in an open position and the locking body 32 in a rest position or in an unlocking position. The rotary latch 40 has a U-shaped recess 50 in which a cross strut 62 of a door hook 60 (cf. Fig. 1 ), for example a door of a washing machine. At the top 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 in the closed position of the rotary latch 40 (cf. Fig. 3a ) to lock the catch 40.

In Fig. 1 is shown schematically the door hook 60, which has a cross strut 62, the in Fig. 1 Door locking device 10 shown is in the closed position. In the closed position of the rotary latch 40, the cross strut 62 of the door hook 60 is arranged or received in the recess 50 of the rotary latch 40 (cf. Fig. 3a ). In the unlocked state (cf. Fig. 3b ), the rotary latch 40 is biased by the spring 48, which is preferably designed as a full detent spring, 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 rotary latch 40, so that the cross strut 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, the door hook 60 (cf. Fig. 3a ) energizes the coil 14 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 rotating crown 28 and the locking body 32 in the direction of the rotary latch 40 are and the locking body 32 is arranged with its free end in the recess 52 of the rotary latch 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 rotating crown 28 remains in position together with the locking body 32 and is held in this position by means of the locking mechanism 24 in order to lock the rotary latch 40. Subsequently, when the coil 14 is energized further, the armature 16 is moved together with the plunger 22 and the crown 26 in the direction of the rotary latch 40, as a result of which the holding position of the locking tension mechanism 24 for the locking body 32 is released, so that the locking body 32 by means of the 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 turning the rotary latch 40 (cf. Fig. 3b ).

All of the above-mentioned features, including those that can only be taken from the drawings, and also individual features that are in combination with other features disclosed are considered alone and in combination as essential to the invention. Embodiments according to the invention can be fulfilled by individual features or a combination of several features.

Reference list

10th

Door locking device

12th

casing

14

Kitchen sink

16

anchor

18th

Compression spring

20

Emergency release body

22

Pestle

24th

Locking mechanism

26

Crown

28

Turret

30th

Guide tube

32

Locking body

34

Holding body

36

Release spring

40

Catch

42

Swivel body

44

Holding piece

46

Holding piece

48

feather

50

Recess

52

Recess

60

Door hook

62

Cross strut

Claims (12)

Door locking device (10) for a door, in particular for a door of a washing machine, with a pivotable rotary latch (40) for a door hook (60), the pivotable rotary latch (40) being arranged on a pivoting body (42), the rotary latch (40 ) has a recess (52) for receiving a locking body (32) for the rotary latch (40), a locking body (32) for locking the rotary latch (40) being provided in its closed position, the locking body (32) with an anchor ( 16) is connected, the armature (16) being surrounded by an energizable coil (14) and when the coil (14) is energized, the armature (16) and the locking body (32) can be moved linearly in the closed position of the rotary latch (40) or are moved so that the locking body (32) in a locked position in the recess (52) of the rotary latch (40) is arranged or can be arranged. 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 set up when the coil (14) is not energized, the armature (16) in to hold a rest position and to counteract the linear movement of the armature (16) when the coil (14) is energized. Door locking device (10) according to claim 1 or 2, characterized in that the armature (16) is connected to a locking mechanism (24) for the locking body (32) using a plunger (22). Door locking device (10) according to Claim 3, characterized in that the locking tensioning mechanism (24) has a crown (26) connected to the tappet (22) and a rotating crown (28) which cooperates with the crown (26) and is connected to the locking body (32) having. Door locking device (10) according to claim 3 or 4, characterized in that the plunger (22) and / or the locking mechanism (24), in particular the crown (26) and the rotating crown (28) of the locking mechanism (24), in a guide tube ( 30) are included. Door locking device (10) according to one of claims 1 to 5, characterized in that for unlocking the locking position of the locking body (32) by further energizing the coil (14) the armature (16) is or can be moved linearly, so that the locking body (32) is moved from the locked position. Door locking device (10) according to one of claims 1 to 6, characterized in that an unlocking spring (36) engaging on the locking body (32) is provided, the unlocking spring (36) being set up to press the locking body (32) into an unlocked position. Door locking device (10) according to one of Claims 1 to 7, characterized in that the rotary latch (40) is pretensioned in the closed position of the rotary latch (40) by means of a spring (48) provided on the swivel body (42). Door locking device (10) according to claim 8, characterized in that the spring (48) of the swivel body (42) for the rotary latch (40) is arranged between two spaced-apart holding pieces (44, 46), a first holding piece (44) with the Rotary latch (40) is rotatably connected and the second holding piece (46) is pivotally mounted about a pivot axis. Door locking device (10) according to one of claims 1 to 9, characterized in that the armature (16) is made of a soft magnetic material. Door locking device (10) according to one of claims 1 to 9, characterized in that a manually operable emergency unlocking body (20) is provided on the armature (16). Use of a door locking device (10) for a door according to one of claims 1 to 11 in a washing machine.

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