CN115263096B

CN115263096B - Door lock for household appliances

Info

Publication number: CN115263096B
Application number: CN202210822609.1A
Authority: CN
Inventors: 王霖铁; 任少江; 张艳
Original assignee: Hanle Electronic Machinery Nanjing Co ltd
Current assignee: Hanle Electronic Machinery Nanjing Co ltd
Priority date: 2022-07-13
Filing date: 2022-07-13
Publication date: 2024-01-26
Anticipated expiration: 2042-07-13
Also published as: CN115263096A

Abstract

The invention discloses a door lock for a household appliance, which comprises a bottom shell, a latch arm, a conversion block, a locking block, a second elastic element and a third elastic element. One end of the latch arm is a latch arm head end, and the other end is a latch arm tail end. The conversion block is arranged on the bottom shell through a shaft, one end of the conversion block is provided with a first convex surface, and the other end of the conversion block is provided with a second convex surface; the tail end of the latch arm is provided with a guide inclined plane, and the first convex surface is contacted with the guide inclined plane under the pressure of the second elastic element; the locking mechanism comprises a locking block and a third elastic element, a locking protrusion is arranged on the locking block, and when the second convex surface is contacted with the upper surface of the locking protrusion, the door lock realizes a locking function. The door lock disclosed by the invention has the advantages of simple structure and high reliability, can be used for realizing strong door opening under the condition of locking the door lock, cannot damage the door lock, and can be locked again when needed. Can be widely applied to household appliances such as dish washers, washing machines, refrigerators and the like.

Description

Door lock for household appliances

Technical Field

The invention belongs to the technical field of household appliance door locks, and particularly relates to a door lock for a household appliance.

Background

In the working process of household appliances such as dish washing machines, washing machines and the like, door locking and locking are generally realized by adopting a mode of matching door buckles and door locks. The door catch and the door lock are respectively arranged on the door and the main body of the household appliance. The door lock is provided with a latch arm, the latch arm is overcome by the elastic force in the process of opening the door, so that the door is separated from the door catch, and the door is opened. In the closing process, the latch arms move relative to the door catch, and finally the door catch is pressed under the action of elasticity, so that the closing effect is achieved. Locking mechanisms are also commonly employed to achieve a locking effect.

With the continuous improvement of living standard, the requirements of users on the door lock function of the household appliances are higher. For example, sometimes, a user needs to forcibly unlock the door lock without damaging the door lock structure and can normally close the door. However, the purpose of locking is to avoid that the door is opened by an external force when locked, which contradicts the above-mentioned requirements, and the door locks currently used for household appliances do not meet the above-mentioned requirements of users.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a door lock for a household appliance, which can be used for forcefully unlocking the door lock without damaging the door lock structure and can be used for normally closing the door.

In order to achieve the above purpose, the present invention adopts the following technical scheme:

a door lock for a household appliance, comprising a bottom shell, a latch arm and a locking mechanism; one end of the latch arm, which is used for being matched with the door catch, is a latch arm head end, and the other end is a latch arm tail end. The locking mechanism comprises a conversion block, a locking block, a second elastic element and a third elastic element; the conversion block is installed on the bottom shell through a shaft, one end of the conversion block is provided with a first convex surface, and the other end of the conversion block is provided with a second convex surface. The latch arm tail end has a guide ramp, and the first convex surface contacts the guide ramp under the pressure of the second elastic element. The locking block is provided with a locking protrusion, and when the second convex surface is contacted with the upper surface of the locking protrusion, the door lock for the household appliance realizes a locking function. A door lock for a household appliance,

when the door lock is opened by a user forcefully, the first latch arm head end and the second latch arm head end deviate from each other, the first latch arm tail end and the second latch arm tail end are close to each other, the guide inclined plane extrudes the first convex surface, the first convex surface is lifted, the second convex surface is pressed down the locking bulge, the locking block moves outwards and compresses the third elastic element, the second convex surface moves downwards along the outer contour of the locking bulge and contacts with the lower surface of the locking bulge, the third elastic element is not compressed by the locking block, and the door lock is opened at the moment, and the door lock is not damaged due to the fact that the third elastic element has elasticity, and the door is opened forcefully.

Further, the latch arms include a first latch arm and a second latch arm, and the first latch arm and the second latch arm are symmetrically hinged on the bottom shell. One ends of the first latch arm and the second latch arm, which are used for being matched with the door catch, are respectively a first latch arm head end and a second latch arm head end, the other ends of the first latch arm and the second latch arm are respectively a first latch arm tail end and a second latch arm tail end, and the first latch arm head end and the second latch arm head end are connected through the first elastic element. The first latch arm tail end and/or the second latch arm tail end has a guide slope, and the first convex surface contacts with the guide slope under the pressure of the second elastic element.

Further, the locking mechanism further comprises a stop block, the stop block is located on the outer side of the locking block, and the stop block is connected with the third elastic element.

Still further, the stopper includes a baffle plate and a connecting portion, the baffle plate being in contact with the locking block; one end of the third elastic element is fixed on the bottom shell, and the other end of the third elastic element is positioned in the connecting part.

Still further, set up spacing arch on the connecting portion, set up spout and spacing groove on the drain pan, the connecting portion slides in the spout, spacing arch slides in the spacing groove.

Further, the locking mechanism further comprises a driving mechanism, and the locking block is driven by the driving element to move along the direction perpendicular to the symmetry axis of the first latch arm and the second latch arm or move along the direction at a certain angle with the symmetry axis of the first latch arm and the second latch arm.

Still further, the locking mechanism further comprises a position switch, a positioning protrusion is arranged on the locking block, and the position switch is used for detecting the position of the positioning protrusion.

In another improvement, the first elastic element adopts a spring, including a torsion spring, a tension spring or a compression spring.

Further, the second elastic element adopts a spring, and comprises a compression spring, a torsion spring and a tension spring; the conversion block is provided with a spring mounting structure in which the spring is mounted.

Further, the third elastic element adopts a spring, including a compression spring, a tension spring or a torsion spring. By changing the pressure value of the spring, the force value of the user to strongly unlock the door lock can be set.

The door lock for the household appliance can realize strong door opening under the condition of locking the door lock; after the door is opened forcefully, the door can be opened and closed normally, the requirement that the customer opens the door forcefully in the process of using the household appliances is met, the door lock cannot be damaged, and the door can be locked again when needed. The door lock for the household appliances has the advantages of simple structure and high reliability, improves the use experience of users, and can be widely applied to household appliances such as dish washers, washing machines, refrigerators and the like.

Drawings

Fig. 1 is a schematic view showing the overall structure of a door lock for a home appliance according to the present invention;

FIG. 2 is a schematic illustration of the latch arm construction of the present invention;

FIG. 3 is a perspective view of the latch arm of FIG. 2;

FIG. 4 is a schematic diagram of a conversion block structure according to the present invention;

FIG. 5 is a right side view of the conversion block of FIG. 4;

FIG. 6 is a perspective view of the conversion block of FIG. 4;

FIG. 7 is a perspective view of the lock block structure of the present invention;

FIG. 8 is a partial plan view of the lock block of FIG. 7;

FIG. 9 is a perspective view of a stop of the present invention;

fig. 10 is a schematic view showing a state in which a door lock for a home appliance is unlocked in an embodiment of the present invention;

FIG. 11 is a schematic side view of the state shown in FIG. 10;

fig. 12 is a schematic view showing a state in which a door lock for a home appliance is not locked in an embodiment of the present invention;

FIG. 13 is a schematic side view of the state shown in FIG. 12;

fig. 14 is a schematic view showing a door lock-up state of a door lock for a home appliance in an embodiment of the present invention;

FIG. 15 is a schematic side view of the state shown in FIG. 14;

fig. 16 is a schematic view showing a state of strong pull after a door lock for a home appliance is closed and locked in an embodiment of the present invention;

FIG. 17 is a schematic side view of the state shown in FIG. 16;

FIG. 18 is a schematic view of the change in position of the switch block relative to the lock block during the pull-up process of FIG. 16.

Description of the embodiments

The door lock for the home appliance according to the present invention will be described in detail with reference to the accompanying drawings. In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "left", "right", "upper", "lower", "bottom", etc., are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the apparatus or element to be referred to must have a specific orientation, be constructed and operated in a specific orientation, and "first", "second", etc. do not represent the importance of the parts and thus are not to be construed as limiting the present invention. The specific dimensions and numerical values adopted in the embodiment are only for illustrating the technical scheme, and do not limit the protection scope of the invention. The following embodiments take the safety door lock of the present invention as an example for a dishwasher, but it should be noted that the safety door lock of the present invention is not limited to be applied to a dishwasher.

As shown in fig. 1, a door lock for a home appliance includes a bottom case 1, a first latch arm 2, a second latch arm 4, a first elastic member 5, a second elastic member 14, and a locking mechanism including a conversion block 13. The first latch arm 2 and the second latch arm 4 are symmetrically hinged on the bottom shell 1, as shown in fig. 2, one ends of the first latch arm 2 and the second latch arm 4 for being matched with a door catch are respectively a first latch arm head end 21 and a second latch arm head end 41, the other ends are respectively a first latch arm tail end 22 and a second latch arm tail end 42, and the first latch arm head end 21 and the second latch arm head end 41 are connected through a first elastic element 5. The conversion block 13 is mounted on the bottom case 1 through the shaft 6, and as shown in fig. 4 to 6, the conversion block 13 has a first convex surface 131 at one end and a second convex surface 132 at the other end. As shown in fig. 2 and 3, the first latch arm tail 22 or the second latch arm tail 42 has a guide inclined surface 15, the first convex surface 131 contacts the guide inclined surface 15 under the pressure of the second elastic member 14, and the first latch arm tail 22 and the second latch arm tail 42 each have the guide inclined surface 15 to improve the door lock stability and the strong door opening effect. The locking mechanism further comprises a locking block 8 and a third elastic member 10, as shown in fig. 7 and 8, wherein a locking protrusion 81 is provided on the locking block, and an upper surface 811 of the locking protrusion 81 contacts the second convex surface 132 under the elastic force of the third elastic member 10. Generally, the surfaces of the first convex surface 131 and the second convex surface 132 have a certain radian, the guiding inclined surface 15 may be a plane, or may have a certain radian, and the first convex surface 131 and the guiding inclined surface may be in surface contact or line contact, or may be in point contact in extreme cases. The surface of the locking protrusion 81 is generally a smoothly transitive curved surface, and in particular, the upper surface 811 is a continuous smooth curved surface.

As shown in fig. 10 and 11, when the door lock is in a state of being opened and unlocked, the first latch arm 2 and the second latch arm 4 are not fastened to the door catch 3. The locking block 8 is not in contact with the conversion block 13 at this time. As shown in fig. 12 and 13, when the door lock is in a closed but unlocked state, the first latch arm 2 and the second latch arm 4 are latched to the door latch 3, and the lock block 8 is not in contact with the switch block 13. As shown in fig. 14 and 15, when the door lock is in a state of closing the door and about to be locked, the first latch arm 2 and the second latch arm 4 are fastened to the door catch 3, and at this time, the locking block 8 is brought into contact with the switching block under the action of the driving mechanism 7, the switching block 13 is limited by the locking block 8 to rotate, and the switching block 13 limits the first latch arm 2 and the second latch arm 4 to rotate, so that the user cannot open the door with a normal force.

As shown in fig. 16 to 18, when the user forcibly opens the door lock in the locked state of the door lock, the first arm head 21 and the second arm head 41 are apart, the first arm tail 22 and the second arm tail 42 are close, the guide slope 15 presses the first convex surface 131, the first convex surface 131 is lifted, and the second convex surface 132 presses the locking protrusion 81. Under the interaction of the second convex surface 132 and the upper surface 811 of the locking protrusion, the locking block 8 and the stopper 9 are forced to move outward and compress the third elastic member 10, the second convex surface 132 moves downward along the outer contour of the locking protrusion 81 to contact with the lower surface 812 of the locking protrusion, at this time, the third elastic member 10 is not compressed by the locking block 8 and returns the stopper 9 to the original position, at this time, the door lock is opened, and since the third elastic member 10 has elasticity, the strong door opening does not damage the door lock. After the door lock is forcibly opened, the second convex surface 132 is positioned at the lower surface 812 of the locking protrusion and is limited by the locking protrusion 81, the conversion block 13 does not return to the original position, and at this time, the locking block 8 of the door lock is at the locking position, but the conversion block 13 does not move synchronously with the opening and the deviating of the first latch arm 2 and the second latch arm 4, and the conversion block 13 is always at a position not contacted with the first latch arm 2 and the second latch arm 4. The first latch arm and the second latch arm are not limited by the conversion block, and the door can still be normally opened and closed at the moment.

Preferably, as shown in fig. 1, the locking mechanism further comprises a stop 9, the stop 9 being located outside the locking block. As shown in fig. 9, the stopper 9 includes a shutter 91 and a connecting portion 92, the shutter 91 being in contact with the lock block 8; as shown in fig. 1, the third elastic member 10 has one end fixed to the bottom case 1 and the other end located in the connection portion 92.

As shown in fig. 1, a limiting protrusion 93 is disposed on the connecting portion 92, a chute 11 and a limiting groove 12 are disposed on the bottom shell 1, the connecting portion 92 slides in the chute 11, and the limiting protrusion 93 slides in the limiting groove 12.

The locking mechanism further comprises a drive mechanism 7, the locking block 8 being moved in a direction perpendicular or at an angle to the symmetry axis of the first latch arm 2 and the second latch arm 4 under the drive of the drive element 7. The locking mechanism also comprises a locking switch, and the current household appliances with doors are generally provided with the locking switch, and can be in an automatic mode or a manual mode. The lock switch is used for sending a driving signal to the driving mechanism, and the driving mechanism 7 can act and change the position of the lock block 8 after receiving the signal. As shown in fig. 1, the locking mechanism further includes a position switch; as shown in fig. 7, the locking block 8 is provided with a positioning protrusion 82, and the position switch is used for detecting the position of the positioning protrusion, so as to determine whether the door lock is in a locked state.

In this embodiment, the first elastic element generally adopts a tension spring or a compression spring, or may adopt a torsion spring, so as to achieve the effect of pulling the first latch arm and the second latch arm. The second elastic element adopts a torsion spring or a tension spring or a compression spring, so that the conversion block is pressed on the latch arm; in this embodiment, a torsion spring groove 133 is formed at the mounting hole of the conversion block, and a torsion spring is mounted in the torsion spring groove 133. The third elastic element has better effect by adopting a pressure spring, and can also adopt a torsion spring or a tension spring, and the force used for forcefully unlocking the door lock can be limited by setting the elasticity of the pressure spring.

Based on the description of the preferred embodiments of the present invention, it should be clear that the invention defined by the appended claims is not limited to the specific details set forth in the above description, but that many apparent variations of the invention are possible without departing from the spirit or scope thereof.

Claims

1. A door lock for a household appliance, comprising a bottom shell, a latch arm and a locking mechanism; one end of the latch arm, which is used for being matched with the door catch, is a latch arm head end, and the other end is a latch arm tail end; the locking mechanism is characterized by comprising a conversion block, a locking block, a first elastic element and a second elastic element; the conversion block is arranged on the bottom shell through a shaft, one end of the conversion block is provided with a first convex surface, and the other end of the conversion block is provided with a second convex surface; the tail end of the latch arm is provided with a guide inclined surface, and the first convex surface is contacted with the guide inclined surface under the pressure of the second elastic element; the locking block is provided with a locking protrusion, and when the second convex surface is contacted with the upper surface of the locking protrusion, the door lock for the household appliance realizes a locking function; the latch arms comprise a first latch arm and a second latch arm, and the first latch arm and the second latch arm are symmetrically hinged on the bottom shell; one ends of the first latch arm and the second latch arm, which are used for being matched with the door catch, are respectively a first latch arm head end and a second latch arm head end, the other ends of the first latch arm and the second latch arm are respectively a first latch arm tail end and a second latch arm tail end, and the first latch arm head end and the second latch arm head end are connected through the first elastic element; the first latch arm tail end and/or the second latch arm tail end has a guide slope, and the first convex surface contacts with the guide slope under the pressure of the second elastic element.

2. The door lock for a home appliance according to claim 1, wherein the locking mechanism further comprises a stopper and a third elastic member, the stopper being located outside the locking stopper, the stopper comprising a baffle and a connecting portion, the stopper being connected with the third elastic member; one end of the third elastic element is fixed on the bottom shell, and the other end of the third elastic element is positioned in the connecting part.

3. The door lock for home appliances claimed in the claim 2, wherein the shutter is in contact with the locking block.

4. A door lock for a household appliance according to claim 3, wherein the connection part is provided with a limit protrusion, the bottom shell is provided with a slide groove and a limit groove, the connection part slides in the slide groove, and the limit protrusion slides in the limit groove.

5. The door lock for a home appliance according to claim 1, wherein the locking mechanism further comprises a driving mechanism, and the locking block is moved in a direction perpendicular to the symmetry axes of the first and second latch arms or in a direction at an angle to the symmetry axes of the first and second latch arms by the driving mechanism.

6. The door lock for a home appliance as claimed in claim 5, wherein the locking mechanism further comprises a position switch provided with a positioning protrusion on the locking block, the position switch being for detecting a position of the positioning protrusion.

7. The door lock for home appliances claimed in any one of claims 1 to 6, wherein the first elastic member adopts a spring, including a torsion spring, a tension spring or a compression spring.

8. The door lock for home appliances claimed in any one of claims 1 to 6, wherein the second elastic member adopts a spring, including a compression spring, a torsion spring, or a tension spring; the conversion block is provided with a spring mounting structure in which the spring is mounted.

9. The door lock for home appliances claimed in any one of claims 2 to 4, wherein the third elastic member employs a spring including a compression spring, a tension spring or a torsion spring.