CN204608413U - The home appliance of door lock and this door lock of use - Google Patents

Abstract

The utility model relates to a door lock and a household appliance using the door lock. The door lock comprises: a housing having an opening for insertion of a hook carried by the door of the device; a cam movable relative to the housing about a first axis A between a locked position and a released position rotation, wherein, in the locking position, the cam is adapted to lock the hook in the closed position; a slider, which cooperates with the cam and is movable between a release position and a locking position, wherein, in the release position, the cam rotates around a second An axis A is free to rotate, and wherein, in the locked position, the slider locks the cam in the locked position; and a locking pin adapted to lock the slider in the locked position, wherein the slider can be locked in the released position and the locked position. Rotate about the second axis B between the positions. The technical solution of the utility model can apply the driving force from the electromagnetic driver to the locking pin more effectively, so as to avoid the deadlock phenomenon and improve the feasibility of manufacturing the door lock.

Description

Door lock and household appliances using the same

technical field

The utility model relates to a door lock used for home appliances such as washing machines, dryers, washing-dryers and similar equipment.

Background technique

WO2013181289 describes a door lock for equipment comprising:

- a housing having an opening for the insertion of a hook carried by the door of the device;

- a cam which is rotatable about an axis of rotation relative to the housing between a locking position and a release position wherein in the locking position the cam is adapted to lock the hook in the closed door position;

- a slider cooperating with the cam and movable between a release position, in which the cam is free to rotate about said axis of rotation, and a locking position, wherein in the locking position, the slider locks the cam in the locked position; and

- An electromagnetic actuator comprising a locking pin adapted to lock said slider in a locked position.

When the load of clothing inside the machine is compressed, a force is created that pushes the door of the machine outward. The aforementioned force is transmitted to the locking pin of the electromagnetic actuator. Loads acting on the door of the machine require greater force to move the locking pin of the electromagnetic actuator from the locked position to the unlocked position. If the electromagnet fails to move the locking pin toward the unlocked position, the door remains locked and the user cannot remove the load from the machine. This situation may require a service call to unlock the door lock and open the door.

Utility model content

The object of the present invention is to provide a door lock for equipment which overcomes these drawbacks.

In order to achieve the above purpose, in the first aspect, the utility model provides a door lock for household appliances, including:

- a housing having an opening for the insertion of a hook carried by the door of the device;

- a cam rotatable about a first axis relative to the housing between a locked position and a released position, wherein in the locked position the cam is adapted to lock said hook in a closed door position;

- a slider cooperating with said cam and movable between a release position and a locked position, wherein in the released position the cam is free to rotate about said first axis A, and wherein in the locked position the slider lock the cam in the locked position; and

- a locking pin adapted to lock said slider in a locked position,

It is characterized in that the slider is rotatable around the second axis B between the release position and the locking position.

The door lock described above is characterized in that said second axis B is oriented at 90° (or orthogonal) relative to said first axis A.

The above door lock is characterized in that the slider has a first locking portion cooperating with the cam and a second locking portion cooperating with the locking pin, wherein the first locking portion and the second locking portion Located on opposite sides with respect to the second axis B, and wherein the distance R1 between the first locking portion and the second axis B is smaller than the distance R2 between the second locking portion and the second axis B.

The above-mentioned door lock is characterized in that the locking pin can move in a linear direction parallel to the second axis B.

The door lock described above is characterized in that the door lock pin moves between a locked position and an unlocked position such that when the lock pin is in the unlocked position, the slider (28) B is free to turn and allows the slider to lock in the locked position when the locking pin is in the locked position.

The door lock described above is characterized in that the slider has a first locking portion and a second locking portion disposed on opposite sides with respect to the second axis B, wherein the first locking portion is intended to contact the cam to The cam is locked in a locked position and the second locking portion is intended to contact said locking pin.

In order to achieve the above purpose, in the second aspect, the present utility model also provides a household electrical appliance, which is characterized in that it includes the door lock defined in any one of the first aspect.

In order to achieve the above purpose, in the third aspect, the present utility model also provides a door lock for household appliances, including any component or any combination of components in any one of the first aspects.

According to the invention, this object is achieved by a door lock having the features forming the main body of the first aspect.

The claims form an integral part of the teaching provided with respect to the present invention.

Description of drawings

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

Fig. 1 is a perspective view of a door lock according to the present utility model;

Fig. 2 is the perspective view of the part indicated by arrow II in Fig. 1; And

3 , 4 and 5 are views according to arrows III, IV and V of FIG. 2 , respectively.

Detailed ways

Referring to FIG. 1 , numeral 10 denotes a door lock for home appliances according to the present invention. The door lock 10 includes a locking unit 12 and an electrical control unit 14 . The locking unit 12 and the electrical control unit 14 may be two separate units provided with respective housings 16 , 18 separate from each other. Alternatively, the locking unit 12 and the electrical control unit 14 may be integrated into a single housing.

The locking unit 12 comprises a cam 20 rotatable about a first axis of rotation A relative to the housing 16 . Cam 20 is rotatable about axis A between a locked position and a released position.

The cam 20 is associated with a first spring 22 . The spring 22 has a bistable function. When the door of the appliance is in the open position, the spring 22 pushes the cam 20 to the release position. When the door of the appliance is closed, the spring 22 pushes the cam 20 into the locked position.

The cam 20 has a hook portion 24 intended to engage a hook 26 carried by a door (not shown) of the electrical appliance. In operation, the hook 26 extends through the opening of the housing 16 into the housing 16 and engages the hook portion 24 on the cam 20 in the released position during closing of the door. Specifically, the hook 26 is provided with a door hook hole 38 , a door hook beam 39 is formed above the door hook hole 38 , and a cam cavity 37 is formed at the front of the cam 20 . When the hook 26 and the hook portion 24 of the cam 20 are engaged, the door hook beam 39 is moved into the cam cavity 37 to form a mutual engagement. The insertion movement of the hook 26 thus rotates the cam 20 about the axis A from the release position to the locking position. When the door is closed, the cam 20 is in the locked position shown in FIGS. 1 to 5 .

The door lock 10 comprises a slider 28 which is rotatable relative to the housing 16 about a second axis of rotation B which is oriented at 90° relative to the first axis A of rotation. The slider 28 is rotatable about a second axis of rotation B between a locked position and an unlocked position. The second spring 30 pushes the slider 28 towards the locked position. Referring to FIGS. 2 to 5 , the slider 28 has a first locking portion 32 and a second locking portion 34 disposed on opposite sides with respect to the second rotational axis B. Referring to FIGS. The first locking portion 32 is intended to contact the cam 20 to lock the cam 20 in the locked position. The second locking portion 34 is intended to contact the locking pin 36 . The locking pin 36 is located in the electrical control unit 14 and is movable in a linear direction parallel to the second axis of rotation B between an unlocked position and a locked position. The locking pin 36 is controlled by an electromagnetic actuator (not shown) located in the electrical control unit 14 . More specifically, by exerting an electromagnetic force on the locking pin 36 (under the control of the electrical control unit 14), the locking pin 36 can be driven by an electromagnetic actuator (not shown) in a direction parallel to the second axis of rotation B. The linear direction (the direction shown by the arrow 41 in FIG. 2 ) moves up and down (or in a reciprocating manner) between the unlocked position and the locked position.

The structure and operation of the electrical control unit 14 are described in detail in document WO2013181289. 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 and locked positions. The cursor 28 is free to rotate about the second axis of rotation B when the pin 36 is in the unlocked position. Thus, the cam 20 is free to rotate about the first axis A of rotation. When the locking pin 36 is in the locked position, the slider 28 is locked in the locked position. In this case, the first locking portion 32 of the slider 28 comes into interfering (preventive) contact with the cam 20 and locks the cam 20 at the locked position.

Referring to FIG. 5 , the first locking portion 32 is located at a distance R1 from the second axis B of rotation. The second locking portion 34 is located at a distance R2 from the second axis B of rotation. Distances R1 and R2 are measured from the center point of the respective locking portion 32 , 34 .

When the door of the appliance is in the closed position, the force acting on the hook 26 is indicated by F in FIG. 3 . The force F generates a force F1 on the first locking portion 32 of the slider 28 . The force F1 is balanced by the force F2 acting on the second locking portion 34 . The moments generated by the two forces F1 and F2 compensate each other such that the following relation holds: F1*R1=F2*R2. According to an advantageous characteristic of the invention, the distance R2 is greater than the distance R1. Therefore, the force F2 applied from the locking pin 36 to the second locking portion 34 is smaller than the force F1 applied to the first locking portion 32 by the cam 20 .

Referring to FIG. 4 , indicated by F3 is the force applied by the electromagnetic actuator to the locking pin 36 to move the locking pin 36 from the locked position to the unlocked position. The fact that the force F2 is reduced relative to the force F1 allows reducing the force F3 required to unlock the slide 28 .

The reduction in the force F3 required to unlock the door lock 10 enables the door lock 10 to be unlocked also in the presence of pressure on the door due to compressive loads in the drum of the machine.

Thus, the solution according to the invention makes it possible to release the door lock even in the most critical conditions, wherein the door lock according to the prior art risks remaining locked with the closed door even when it needs to be opened.

It should be noted that the inventive arrangement of the parts in the structure of the present invention as a whole provides a suitable technical solution which can provide certain technical advantages in the door lock. For example, configuring a cam 20 rotatable around a first axis of rotation A, a slider 28 rotatable around a second axis of rotation B, and a locking pin 36 movable in a linear direction parallel to the second axis of rotation B not only The driving force of the actuator is effectively applied to the locking pin 36 and it is a suitable way to configure the moving parts (including the cam 20 , the slider 28 and the locking pin 36 ) to perform different functions and fit in a confined space. This configuration improves the feasibility of manufacturing such a door lock.

In addition, by providing the first locking portion 32 and the second locking portion 34 on opposite sides of the slider 28 by rotating B with respect to the second axis, and by disposing the first locking portion 32 to contact the cam 20 and the second locking The portion 34 is configured to contact the locking pin 36, and the technical solution of the present invention can further improve the effectiveness of applying the driving force from the electromagnetic actuator to the locking pin 36, and improve the feasibility of manufacturing such a door lock.

It should be noted that this technical solution may have other technical advantages, which should not be limited to those specifically described in this application.

Of course, without affecting the principles of the invention, extensive changes may be made in construction details and embodiments with respect to those described and illustrated and without departing from the principles of the appended claims. The scope of the utility model.

Claims (8)

1. A door lock for household appliances, comprising: - a housing (16) having an opening for the insertion of a hook (26) carried by the door of the device; - a cam (20) rotatable about a first axis (A) relative to the housing (16) between a locked position and a released position, wherein in the locked position the cam (20) is adapted to Lock the hook (26) in the closed position; - a slide (28) cooperating with said cam (20) and movable between a release position and a locked position, wherein in the release position the cam (20) is about said first axis ( A) free to rotate, and wherein, in the locked position, the slider (28) locks the cam (20) in the locked position; and - a locking pin (36) adapted to lock said slider (28) in the locked position, It is characterized in that said slider (28) is rotatable about a second axis (B) between said release position and said locking position. 2. A door lock according to claim 1, characterized in that said second axis (B) is oriented at 90° (or orthogonal) relative to said first axis (A). 3. The door lock according to claim 1, characterized in that said slider (28) has a first locking portion (32) cooperating with said cam (20) and a first locking portion (32) cooperating with said locking pin (36) The second locking portion (34), wherein the first locking portion (32) and the second locking portion (34) are located on opposite sides with respect to the second axis (B), and wherein the first locking portion (32 ) and the second axis (B) is smaller than the distance (R2) between the second locking portion (34) and the second axis (B). 4. The door lock according to claim 1, characterized in that the locking pin (36) is movable in a linear direction parallel to the second axis (B). 5. The door lock according to claim 4, characterized in that the door locking pin (36) is movable between a locking position and an unlocking position such that when the locking pin (36) is in the unlocking position, The slider (28) is free to rotate about the second axis (B) and is such that the slider (28) is locked in the locked position when the locking pin (36) is in the locked position. 6. The door lock according to claim 1, characterized in that the slider (28) has a first locking portion (32) and a second locking portion disposed on opposite sides with respect to the second axis (B). part (34), wherein the first locking part (32) is intended to contact the cam (20) to lock the cam (20) in the locked position, and the second locking part (34) is intended to contact the locking pin (36) . 7. A household electrical appliance, characterized in that it comprises the door lock as defined in any one of claims 1-6. 8. A door lock for household electrical appliances, comprising any component of any one of claims 1 to 6 or any combination of components of any one of claims 1 to 6.