DE202015100627U1 - Door lock with swivel slide - Google Patents

Abstract

Door lock for household appliances, comprising: - a housing (16) having an opening for inserting a hook (26) which is held by the door of the device; A cam (20) which is rotatable relative to the housing (16) about a first axis (A) between a holding position and a release position, wherein in the stop position the cam (20) is adapted to receive the hook (26) locked in the position of a closed door, - a slider (28) which cooperates with the cam (20) and is movable between a release position and a lock position, wherein in the release position the cam (20) is free about the first axis (A In the closed position, the slider (28) locks the cam (20) in the holding position, a locking pin (36) designed to lock the slider (28) in the locking position, characterized in that the slider (28) is rotatable about a second axis (B) between the release position and the lock position.

Description

Technical area

The present invention relates to a door lock for household appliances, such as e.g. Washing machines, dryers, washer driers and the like.

State of the art

• – ein Gehäuse mit einer Öffnung zum Einführen eines Hakens, welcher von der Tür des Geräts gehalten wird;
• – einen Nocken, welcher relativ zum Gehäuse um eine Rotationsachse zwischen einer Halteposition und einer Freigabeposition drehbar ist, wobei in der Halteposition der Nocken so angepasst ist, dass er den Haken in der Position einer geschlossen Tür verriegelt,
• – einen Schieber, welcher mit dem Nocken zusammenwirkt und zwischen einer Freigabeposition und einer Verschlussposition beweglich ist, wobei in der Freigabeposition der Nocken frei um die Rotationsachse drehen kann, und wobei in der Verschlussposition der Schieber den Nocken in der Halteposition verriegelt, und
• – einen elektromagnetischen Aktor, welcher einen Verriegelungsstift aufweist, welcher ausgelegt ist, den Schieber in der Verschlussposition zu verriegeln.

The WO 2013/181 289 describes a door lock for household appliances, comprising:

• A housing having an opening for inserting a hook, which is held by the door of the device;
• A cam which is rotatable relative to the housing about an axis of rotation between a holding position and a release position, wherein in the stop position the cam is adapted to lock the hook in the position of a closed door,
• A slider which cooperates with the cam and is movable between a release position and a lock position, wherein in the release position the cam is free to rotate about the rotation axis, and wherein in the lock position the slider locks the cam in the stop position, and
• An electromagnetic actuator having a lock pin configured to lock the slider in the lock position.

When the wash load is compressed inside the machine, a high force pushes the door of the machine outward. This force is transmitted to the locking pin of the electromagnetic actuator. The charge acting on the door of the machine requires a greater force to move the locking pin of the electromagnetic actuator from the lock position to the unlocked position. If the solenoid is unable to move the lock pin to the unlocked position, the door remains locked and the operator can not remove the load from the machine. This situation may require a service call to unlock the door lock and open the door.

Goal and summary

The present invention aims to provide a door lock for appliances which can overcome these disadvantages.

According to the present invention, this object is achieved by a door lock having the features forming part of claim 1.

The claims form an integral part of the teachings provided in connection with the invention.

Brief description of the drawings

The characteristics and advantages of the present invention will become apparent in the course of the detailed description which follows, which is given by way of non-limiting example only with reference to the accompanying drawings, in which:

1 3 is a perspective view of a door lock according to the present invention;

2 a perspective view of the arrow II in 1 specified part, and

3 . 4 and 5 Views according to the arrows III, IV and V in 2 are.

Detailed description

Regarding 1 shows the number 10 a door lock for household appliances according to the present invention. The door lock 10 has a locking unit 12 and an electric control unit 14 on. The locking unit 12 and the electrical control unit 14 can be two independent units, which are separated from each other and with respective housings 16 . 18 are provided. Alternatively, the locking unit 12 and the electrical control unit 14 be integrated into a single housing.

The locking unit 12 has a cam 20 on, which relative to the housing 16 about a first axis of rotation A is rotatable. The cam 20 is rotatable about the axis A between a holding position and a release position.

The cam 20 is a first spring 22 assigned. The feather 22 has a bistable function. When the door of the device is in the open position, the spring pushes 22 the cam 20 in the release position. When the door of the unit is closed, the spring pushes the cam to the stop position.

The cam has a hooking part 24 which with a hook 26 to be engaged, which is supported by a door (not shown) of a household appliance. In operation, the hook penetrates while closing the door 26 through an opening in the housing 16 in the case 16 and arrives with the Einhakungsteil 24 of the cam 20 engaged in the release position. The insertion movement of the hook 26 turns the cam 20 about the axis A from the release position to the stop position. When the door is closed, there is the Cam in the holding position, as in 1 to 5 shown.

The door lock 10 has a slider 28 on, which relative to the housing 16 is rotatable about a second axis of rotation B, which is oriented at 90 ° with respect to the first axis of rotation A. The slider 28 is rotatable about the second rotation axis B between a lock position and an unlock position. A second spring 30 pushes the slider 28 towards the closed position. With reference to the 2 to 5 has the slider 28 a first locking part 32 and a second locking part 34 which are arranged on opposite sides with respect to the second rotation axis B. The first locking part 32 should the cam 20 Contact the cam 20 to lock in the holding position. The second locking part 34 should a locking pin 36 to contact. The locking pin 36 is in the electrical control unit 14 and is movable in a rectilinear direction parallel to the second rotation axis B between an unlocking position and a closing position. The locking pin 36 is controlled by an electromagnetic actuator (not shown) which is in the electrical control unit 14 is arranged.

The structure and operation of the electrical control unit 14 are detailed in the document WO 2013/181 289 described. For the purposes of the present invention, it is sufficient to note that the electromagnetic actuator controls the movement of the locking pin 36 between the unlocked position and the lock position. If the pen 36 is in the unlocked position, the slide can 28 rotate freely around the second axis of rotation B. Consequently, the cam can 20 rotate freely around the first axis of rotation A. When the locking pin 36 is in the locked position, the slider is 28 locked in the locked position. In this state, the first locking part engages 32 of the slider 28 in the cams 20 and locks the cam 20 in the stop position.

Regarding 5 is the first locking part 32 arranged at a distance R1 from the second rotation axis B. The second locking part 34 is disposed at a distance R2 from the second rotation axis B. The distances R1 and R2 become with respect to a central point of the respective locking parts 32 . 34 measured.

When the door of the device is in the closed position, it acts on the hook 26 a force indicated by F in 3 is specified. The force F generates a force F1 ( 5 ) on the first locking part 32 of the slider 28 , The force F1 is held in equilibrium by a force F2 acting on the second locking part 34 acts. The torques generated by the two forces F1 and F2 compensate each other, so that the following relationship exists. F1 × R1 = F2 × R2. According to an advantageous feature of the present invention, the distance R2 is greater than the distance R1. Therefore, the force F2, which is the locking pin 36 to the second locking part 34 is applied, is less than the force F1, which of the cam 20 to the first locking part 32 is created.

Regarding 4 F3 indicates the force applied to the locking pin 36 is applied by the electromagnetic actuator to the locking pin 36 to move from the closed position to the unlocked position. The fact that the force F2 is reduced with respect to the force F1 makes it possible to reduce the force F3 needed to move the slider 28 to unlock.

The reduction of force F3, which is needed to lock the door 10 unlocking the door lock thus allows under conditions under which a pressure on the door is exerted due to a compressed charge in the drum of the machine.

The solution according to the present invention therefore enables the release of the door lock even in the most critical conditions in which a door lock according to the prior art risks remaining locked with the door closed.

Of course, without prejudice to the principle of the invention, the construction details and the embodiments may vary considerably with respect to those described and illustrated, without departing from the scope of the invention as defined in the following claims.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• WO 2013/181289 [0002, 0016]

Claims (3)

Door lock for household appliances, comprising: - a housing ( 16 ) with an opening for inserting a hook ( 26 ), which is held by the door of the device; - a cam ( 20 ), which relative to the housing ( 16 ) is rotatable about a first axis (A) between a holding position and a release position, wherein in the holding position of the cam ( 20 ) is adjusted so that he has the hook ( 26 ) locked in the position of a closed door, - a slide ( 28 ), which with the cam ( 20 ) and is movable between a release position and a closure position, wherein in the release position of the cam ( 20 ) can rotate freely about the first axis (A), and wherein in the closed position the slider ( 28 ) the cam ( 20 ) locked in the holding position, - a locking pin ( 36 ), which is designed to move the slider ( 28 ) in the closed position, characterized in that the slider ( 28 ) is rotatable about a second axis (B) between the release position and the lock position. Door lock according to claim 1, characterized in that the second axis (B) is oriented at 90 ° with respect to the first axis (A). Door lock according to claim 1, characterized in that the slide ( 28 ) a first locking part ( 32 ), which with the cam ( 20 ) and a second locking part ( 34 ), which with the locking pin ( 36 ), wherein the first and second locking parts ( 32 . 34 ) on opposite sides with respect to the second axis (B) are arranged, and wherein the distance (R1) between the first locking part ( 32 ) and the second axis (B) is less than the distance (R2) between the second locking part ( 34 ) and the second axis (B).

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