Door lock device for dishwasher

Abstract

The present invention provides a dishwasher door lock device, comprising a housing, a lock hook, and a drive plate. The lock hook is provided with a convex iso-arc surface and a locking portion at each end, respectively. The drive plate has a concave iso-arc surface at its end. A movable auxiliary drive plate is also provided within the housing, along with left and right door closing operation plates, respectively, located on either side of the lock hook. Both the left and right door closing operation plates are equipped with return torsion springs and are linked to the lock hook. The auxiliary drive plate has an inclined surface on one end facing the lock hook. When the inclined surface disengages from abutment with the lock hook, it applies a force to assist in closing the door. When the inclined surface abuts against the lock hook, it applies a reversing force to maintain the lock hook in its extreme position. This door lock device has excellent anti-accidental triggering capabilities, requires little closing force, is easy to operate, and can enhance the user experience.

Description

Technical field

[0001] The present invention relates to the technical field of door locks, in particular to a door lock device for a dishwasher. [Background Technology]

[0002] At present, the door covers of household appliances, especially dishwashers, are equipped with door lock devices to ensure the sealing effect during operation and prevent hot water from splashing when the door cover is opened abnormally. The locking force provided by the door lock device keeps the door cover closed after closing. The invention of application number 202111558336.6 proposes a door lock device with low closing force, easy operation, and a door closing reset function after false triggering, and can improve the user's operating experience. However, this door lock device still has certain disadvantages:

[0003] 1. The lock hook locks the door prematurely after being triggered by mistake. When closing the door again, the resistance for the lock hook to automatically reset and enter the lock slot is much greater than the normal closing force, resulting in a poor user experience.

[0004] 2. After the door is opened, the locking part of the lock hook is at the same height as the door cover. Due to the height fluctuation of the door cover, when the door cover is higher than the locking part of the lock hook, closing the door will mistakenly trigger the lock hook, causing the lock hook to lock the door prematurely.

[0005] 3. When the user touches the door closing operation panel, the lock hook will also trigger the door to lock in advance.

[0006] Under the premise of ensuring a small closing force, a door closing sound prompt after the door is triggered, and a locking force after the door is closed, in order to improve its anti-false triggering ability and provide a better operating experience for users, a door lock device for a dishwasher with a good door closing operation feel is proposed. [Summary of the invention]

[0007] The purpose of the present invention is to solve the problems in the prior art and to provide a door lock device for a dishwasher, which has good anti-mistriggered ability, small door closing force, easy operation, and can improve the user's operating experience.

[0008] To achieve the above-mentioned purpose, the present invention proposes a door lock device for a dishwasher, comprising a housing, a movable lock hook arranged in the housing, and a driving plate equipped with a driving plate spring, wherein both ends of the lock hook are respectively provided with an outer convex arc surface and a locking portion, and the end of the driving plate is provided with an inner concave arc surface. When the inner concave arc surface of the driving plate is disengaged from the outer convex arc surface of the lock hook, an auxiliary door closing force is applied to the lock hook, and the locking portion of the lock hook can be locked with the lock groove of the door cover. A movable auxiliary driving plate is further provided in the housing, as well as a left door closing operation plate and a right door closing operation plate respectively provided on both sides of the lock hook. The left door closing operating plate and the right door closing operating plate are both equipped with a return torsion spring and are linked with the lock hook. When the left door closing operating plate and the right door closing operating plate rotate synchronously under the drive of the door cover closing action, the right door closing operating plate applies a force to the lock hook to drive its rotation, and at the same time, the left door closing operating plate releases the blocking force that prevents the lock hook from rotating; the auxiliary driving plate is provided with an inclined surface at one end facing the lock hook, and when the inclined surface is disengaged from the lock hook, an auxiliary door closing force is applied to the lock hook, and when the inclined surface is abutted against the lock hook, a reversing force is applied to the lock hook to keep it in the extreme position.

[0009] Preferably, a second door closing trigger unit is provided on the side of the right door closing operating plate facing the lock hook, and a driving torsion spring is provided on the second door closing trigger unit. When the right door closing operating plate rotates, a force is applied to the lock hook through the driving torsion spring to drive it to rotate.

[0010] Preferably, a first door closing trigger unit is provided on the side of the lock hook facing the right door closing operating panel, and when the right door closing operating panel rotates, the lock hook is controlled to rotate by the first door closing trigger unit.

[0011] Preferably, a block is provided on the side of the left door closing operating panel facing the lock hook, and a step is provided on the lock hook. When the right door closing operating panel rotates and the left door closing operating panel does not rotate, the block of the left door closing operating panel abuts against the step of the lock hook to prevent the lock hook from rotating.

[0012] Preferably, a driving protrusion is further provided on the outer side of the lock slot of the door cover, and when the lock hook is in the extreme position, the lowest point of the locking part is higher than the highest point of the driving protrusion.

[0013] Preferably, an auxiliary spring is provided at one end of the auxiliary drive plate facing away from the lock hook, and a boss is provided at one end of the lock hook facing the inclined surface.

[0014] Beneficial effects of the present invention:

[0015] 1. When the door cover is opened, the locking part of the lock hook is always much higher than the door cover height, avoiding the problem of the door cover touching the lock hook in advance when closing the door, causing premature locking.

[0016] 2. When the door is open, if the user accidentally touches the door closing operation panel, the lock hook will not lock prematurely; when closing the door normally, the door cover will trigger the left and right door closing operation panels at the same time to close the door smoothly.

[0017] The features and advantages of the present invention will be described in detail through embodiments with reference to the accompanying drawings.

Brief Description of the Drawings

[0018] Figure 1 This is a schematic diagram of the internal structure of a door lock device of a dishwasher according to the present invention;

[0019] Figure 2 This is a schematic structural diagram of the state of the drive plate of the present invention when the door is open;

[0020] Figure 3 This is a structural diagram of the auxiliary drive plate of the present invention in the door open state;

[0021] Figure 4 This is a structural diagram of the right door closing operating panel of the present invention in the door open state;

[0022] Figure 5 It is a structural schematic diagram of the state of the right door closing operating panel of the present invention when the door is closed;

[0023] Figure 6 This is a schematic structural diagram of the state of the drive plate of the present invention when the door is closed;

[0024] Figure 7 2 is a schematic structural diagram of the auxiliary drive plate of the present invention when the door is closed;

[0025] Figure 8 This is a schematic structural diagram of the state of the drive plate of the present invention when the door is closed;

[0026] Figure 9 This is a structural diagram of the auxiliary drive plate of the present invention in a closed state;

[0027] Figure 10 This is a schematic structural diagram of the state of the drive plate of the present invention when the door is opened;

[0028] Figure 11 2 is a schematic structural diagram of the auxiliary drive plate of the present invention when the door is opened;

[0029] Figure 12 A schematic structural diagram of the right door closing operating panel and the left door closing operating panel of the present invention in the state of false triggering;

[0030] Figure 13 It is a structural schematic diagram of a lock hook of a door lock device of a dishwasher according to the present invention;

[0031] Figure 14 This is a structural schematic diagram of a left door closing operating panel of a door lock device of a dishwasher according to the present invention;

[0032] Figure 15 This is a structural schematic diagram of a right door closing operating panel of a door lock device of a dishwasher according to the present invention;

[0033] Figure 16 It is a structural schematic diagram of a driving plate of a door lock device of a dishwasher according to the present invention;

[0034] Figure 17 The present invention is a structural schematic diagram of an auxiliary drive plate of a door lock device of a dishwasher. [Specific implementation method]

[0035] See Figures 1 to 17 The present invention provides a door lock device for a dishwasher, comprising a housing 1 with a lock hole, a movable lock hook 2 arranged in the housing 1, and a driving plate 5 equipped with a driving plate spring 50, wherein the two ends of the lock hook 2 are respectively provided with a convex cambered surface 22 and a locking portion 23, and the end of the driving plate 5 is provided with a concave cambered surface 51. When the concave cambered surface 51 of the driving plate 5 is disengaged from the convex cambered surface 22 of the lock hook 2, an auxiliary force for closing the door is applied to the lock hook 2, and the locking portion 23 of the lock hook 2 can be locked with the lock groove 101 of the door cover 10. A movable auxiliary driving plate 6 is further provided in the housing 1, as well as a left door closing operating plate 3 and a right door closing operating plate 3 respectively arranged on both sides of the lock hook 2. The operating panel 4, the left door closing operating panel 3 and the right door closing operating panel 4 are both equipped with a return torsion spring 7 and are linked with the lock hook 2. When the left door closing operating panel 3 and the right door closing operating panel 4 rotate synchronously under the drive of the closing action of the door cover 10, the right door closing operating panel 4 applies a force to the lock hook 2 to drive its rotation, and at the same time, the left door closing operating panel 3 releases the blocking force that prevents the lock hook 2 from rotating; the auxiliary driving plate 6 is provided with an inclined surface 61 at one end facing the lock hook 2, and when the inclined surface 61 is disengaged from the lock hook 2, an auxiliary door closing force is applied to the lock hook 2, and when the inclined surface 61 is in abutment with the lock hook 2, a reversing force is applied to the lock hook 2 to keep it in the extreme position.

[0036] Furthermore, a second door closing trigger unit 41 is provided on the side of the right door closing operating plate 4 facing the lock hook 2, and a driving torsion spring 42 is provided on the second door closing trigger unit 41. When the right door closing operating plate 4 rotates, a force is applied to the lock hook 2 through the driving torsion spring 42 to drive it to rotate.

[0037] Furthermore, a first door closing trigger unit 26 is provided on the side of the lock hook 2 facing the right door closing operating plate 4 . When the right door closing operating plate 4 rotates, the lock hook 2 is controlled to rotate by the first door closing trigger unit 26 .

[0038] Furthermore, a block 31 is provided on the side of the left door closing operating panel 3 facing the lock hook 2, and a step 25 is provided on the lock hook 2. When the right door closing operating panel 4 rotates and the left door closing operating panel 3 does not rotate, the block 31 of the left door closing operating panel 3 abuts against the step 25 of the lock hook 2 to prevent the lock hook 2 from rotating.

[0039] Furthermore, a driving protrusion 102 is further provided on the outer side of the lock slot 101 of the door cover 10 . When the lock hook 2 is at the extreme position, the lowest point of the locking portion 23 is higher than the highest point of the driving protrusion 102 .

[0040] Furthermore, an auxiliary spring 60 is provided on one end of the auxiliary driving plate 6 facing away from the lock hook 2 , and a boss 24 is provided on one end of the lock hook 2 facing the inclined surface 61 .

[0041] Furthermore, a sliding groove is provided in the housing 1, and the lock hook 2 is movably mounted in the sliding groove via a support shaft 21. The sliding groove is provided with a sliding slope, and the lower end of the sliding slope has a fixed groove. When the driving protrusion 102 of the door cover 10 abuts against the lock hook 2 and applies a force to the lock hook 2 that compresses the driving leaf spring 50, the support shaft 21 of the lock hook 2 is disengaged from the fixed groove and moves along the sliding slope toward the upper end.

[0042] Working process of the present invention:

[0043] 1. Door open status:

[0044] See Figure 2 、 3 Under the action of the drive plate spring 50, the lock hook 2 moves rightward along the sliding groove to the limit position of the fixed groove 11. The convex arc surface 22 of the lock hook 2 contacts the concave arc surface 51 of the drive plate 5. At this time, the rotational torque of the drive plate 5 on the lock hook 2 is zero. At the same time, the boss 24 of the lock hook 2, under the action of the inclined surface 61 of the auxiliary drive plate 6, exerts a counterclockwise torque. The combined effect of the two torques causes the lock hook 2 to rotate counterclockwise to the limit position. At this point, there is a large gap between the locking portion 23 of the lock hook 2 and the locking groove 101 of the door cover 10. When the door is closed, the door cover 10 will not first contact the locking portion 23 of the lock hook 2.

[0045] See Figures 2 to 4 The left door closing operating plate 3 and the right door closing operating plate 4 are in the reset position under the action of the reset torsion spring 7, and the second door closing trigger unit 41 of the right door closing operating plate 4 and the first door closing trigger unit 26 of the lock hook 2 are in a disengaged state.

[0046] 2. Door closing action:

[0047] See Figure 5 、 67. When the door cover 10 is closed, the door cover 10 drives the left door closing operating plate 3 and the right door closing operating plate 4 to rotate synchronously. The right door closing operating plate 4 drives the driving torsion spring 42 to move. The driving torsion spring 42 then drives the first door closing trigger unit 26, which then drives the lock hook 2 to rotate, overcoming the friction of the concave iso-arc surface 51 of the driving plate 5 and the thrust of the auxiliary driving plate 6. When the convex iso-arc surface 22 of the lock hook 2 disengages from the concave iso-arc surface 51 of the driving plate 5, the driving plate 5 applies a horizontal force to the lock hook 2, and the lock hook 2 rotates in the door closing direction under the action of this force. At the same time, under the action of the auxiliary spring 60, the auxiliary driving plate 6 also applies a torque to the boss 24 of the lock hook 2 in the auxiliary door closing direction. The two combined forces cause the lock hook 2 to enter the lock slot 101 of the door cover 10, generating a door closing impact sound, and assisting in door closing during the subsequent rotation process. Figure 7 During the door closing operation, since the left door closing operating panel 3 and the right door closing operating panel 4 rotate synchronously, the block 31 of the left door closing operating panel 3 and the step 25 of the lock hook 2 will not interfere with each other, ensuring normal door closing.

[0048] 3. Closed state:

[0049] See Figure 8 、 9 Under the action of the driving spring and the auxiliary spring 60, the lock hook 2 applies a force to the door cover 10 to continuously close the door.

[0050] 4. Door opening action:

[0051] See Figure 10 、 Figure 11 When opening the door, the door cover 10 pulls out the lock hook 2 until the convex arc surface 22 of the lock hook 2 and the concave arc surface 51 of the drive plate 5 abut against each other. At this time, the torque applied by the drive plate 5 on the lock hook 2 is 0. At the same time, the inclined surface 61 of the auxiliary drive plate 6 applies force to the boss 24 of the lock hook 2, generating a counterclockwise torque, so that the lock hook 2 remains in the extreme position of the door opening state (refer to the door opening state) even after the force applied by the door cover 10 disappears.

[0052] 5. Anti-false triggering function:

[0053] See Figure 12 In the open state, when closing the door normally, the left door closing operating plate 3 and the right door closing operating plate 4 rotate at the same time, and the stopper 31 of the left door closing operating plate 3 is always before the step 25 of the lock hook 2. Figures 5 to 7 , hook 2 has no additional resistance.

[0054] When the user manually triggers the right door closing operating panel 4 by mistake, the door closing operating panel drives the lock hook 2 to rotate, while the left door closing operating panel 3 does not rotate. At this time, the step 25 of the lock hook 2 interferes with the stopper 31 of the left door closing operating panel 3, preventing the lock hook 2 from rotating to close the door. Therefore, the lock hook 2 will not be triggered by mistake.

[0055] When the user manually triggers the left door closing operating plate 3 by mistake, the lock hook 2 does not rotate because the left door closing operating plate 3 does not apply a rotation torque to the lock hook 2. Therefore, the lock hook 2 will not be triggered by mistake.

[0056] The above embodiments are intended to illustrate the present invention, not to limit the present invention. Any solution that is a simple transformation of the present invention falls within the protection scope of the present invention.

Claims

1. A door lock device for a dishwasher, comprising a housing (1), a lock hook (2) movable in the housing (1), and a drive plate (5) equipped with a drive plate spring (50), wherein the lock hook (2) is provided with an outwardly convex arc surface (22) and a locking portion (23) at both ends, and the end of the drive plate (5) is provided with an inwardly concave arc surface (51), and when the inwardly concave arc surface (51) of the drive plate (5) and the outwardly convex arc surface (22) of the lock hook (2) are disengaged from each other, a force is applied to the lock hook (2) to assist in closing the door, and the device is characterized in that: The housing (1) is further provided with a movable auxiliary driving plate (6), and a left door closing operating plate (3) and a right door closing operating plate (4) respectively arranged on both sides of the lock hook (2). The left door closing operating plate (3) and the right door closing operating plate (4) are both equipped with a reset torsion spring (7) and are linked with the lock hook (2). When the left door closing operating plate (3) and the right door closing operating plate (4) rotate synchronously under the driving force of the closing action of the door cover (10), the right door closing operating plate (4) is pressed against the lock hook (2). The lock hook (2) exerts a force driving the lock hook (2) to rotate, and at the same time, the left door closing operating plate (3) releases the blocking force preventing the lock hook (2) from rotating; the auxiliary driving plate (6) is provided with an inclined surface (61) at one end facing the lock hook (2); when the inclined surface (61) is disengaged from abutting against the lock hook (2), an auxiliary door closing force is exerted on the lock hook (2); when the inclined surface (61) abuts against the lock hook (2), a reverse force is exerted on the lock hook (2) to keep it in an extreme position.

2. A door lock device for a dishwasher according to claim 1, characterized in that: A second door closing trigger unit (41) is provided on the side of the right door closing operating plate (4) facing the lock hook (2), and a driving torsion spring (42) is provided on the second door closing trigger unit (41). When the right door closing operating plate (4) rotates, a force is applied to the lock hook (2) through the driving torsion spring (42) to drive the lock hook (2) to rotate.

3. The door lock device of a dishwasher according to claim 1, characterized in that: A first door closing trigger unit (26) is provided on the side of the lock hook (2) facing the right door closing operating plate (4); when the right door closing operating plate (4) rotates, the lock hook (2) is controlled to rotate by the first door closing trigger unit (26).

4. The door lock device for a dishwasher according to claim 1, wherein: A stopper (31) is provided on the side of the left door closing operating panel (3) facing the lock hook (2), and a step (25) is provided on the lock hook (2). When the right door closing operating panel (4) rotates and the left door closing operating panel (3) does not rotate, the stopper (31) of the left door closing operating panel (3) abuts against the step (25) of the lock hook (2), thereby preventing the lock hook (2) from rotating.

5. The door lock device of a dishwasher according to claim 1, characterized in that: A driving protrusion (102) is further provided on the outside of the lock slot (101) of the door cover (10); when the lock hook (2) is in the extreme position, the lowest point of the locking portion (23) is higher than the highest point of the driving protrusion (102).

6. The door lock device for a dishwasher according to claim 1, characterized in that: An auxiliary spring (60) is provided at one end of the auxiliary driving plate (6) facing away from the lock hook (2), and a boss (24) is provided at one end of the lock hook (2) facing the inclined surface (61).

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