Door locks for cleaning machines and cleaning machines

Abstract

This invention relates to a door lock for a cleaning machine and a cleaning machine, comprising: a lock pin disposed on the upper surface of the door body; a locking member disposed on the top of the main body of the cleaning machine for engaging with the lock pin to lock the door body; a driving member disposed on the rear side of the locking member, movable back and forth; and a limiting mechanism for limiting the driving member in the locked state and releasing the limiting mechanism when the door is automatically opened. In the closed state, the locking member rotates to the lock jaws to grip the lock pin, and the driving member holds the locking member in this state. In the open state, the locking member rotates to the lock jaws to disengage from the lock pins and is positioned above the main body of the cleaning machine, and the driving member holds the locking member in this state, improving stability in both the open and closed states. The locking member always maintains an opening tendency. When the door is closed, the driving member is limited, and the locking member cannot move, ensuring reliable closing. When the door is automatically opened, the limiting mechanism releases the limiting mechanism on the driving member, and the locking member can automatically disengage from the lock pin, opening the door to a certain angle.

Description

Technical Field

[0001] This invention relates to the field of dishwasher technology, specifically to a door lock for a washing machine and the washing machine itself. Background Technology

[0002] A dishwasher typically consists of a main body and a door. The main body has a hollow washing chamber, and an opening on the front of the main body allows the washing chamber to be open. The door is located on the front of the main body and is used to open or close the opening. When the door is closed, a door lock is usually required to lock the door to the main body to ensure that the door will not open during use.

[0003] Chinese patent CN214035161U, entitled "A Door Lock Structure for a Dishwasher and a Dishwasher Using the Door Lock Structure" (application number: CN202021963616.6), discloses a door lock structure for locking the door. The structure includes a dishwasher door and a latch for locking the door. The exterior of the door has a latch that engages with the latch. The latch can move onto the latch and engage with it to lock the door. The door has a mounting hole, and the interior has a fixing member for securing the latch. The latch has a connector that can pass through the mounting hole and be inserted into the interior of the door. The connector connects to the fixing member to secure the latch to the door.

[0004] While the above structure makes it easy to lock the door to the body, after the latch engages in the recess, the latch is contained in the recess and does not exert any force on the door. It is difficult to achieve a good seal between the door and the body. In fact, the door may even naturally fold outward with its bottom pivot as support, which will adversely affect the seal between the door and the body.

[0005] To address the aforementioned issues, the applicant's earlier application CN202211108310.6, "Door Lock for Cleaning Machine and Cleaning Machine," discloses a structure with a locking element that engages with a lock groove at the top of the door. In the closed state, the locking hook of the locking element flips downwards to engage with the lock groove. A pushing component continuously pushes the rear end of the locking element forward, causing the lock hook to hook tightly against the inner wall of the lock groove, ensuring the door maintains a pressing force against the cleaning machine body, thereby improving the seal between the door and the machine body. A driving component is also included. During the opening process, at the moment the lock hook disengages from the lock groove, the door can no longer apply a flipping force to the locking element. At this time, the driving component acts on the locking element, causing it to continue flipping backwards, causing the lock hook to continue moving upwards away from the upper edge of the door, thus preventing interference between the lock hook and the upper edge of the cleaning machine door in the closed state, improving the reliability of the door lock. However, due to structural limitations, both opening and closing actions must be performed manually. After the washing machine finishes washing, a lot of high-temperature steam often remains in the washing chamber. When the door is opened manually, the steam can easily burn the user, which greatly affects the user experience. Summary of the Invention

[0006] The first technical problem to be solved by the present invention is to provide a door lock for a cleaning machine that can be opened manually or automatically at a certain angle in advance to release steam, in light of the current state of the technology.

[0007] The second technical problem to be solved by the present invention is to provide a cleaning machine that uses the above-mentioned door lock, in view of the current state of the prior art.

[0008] The technical solution adopted by the present invention to solve at least one of the above-mentioned technical problems is as follows:

[0009] A door lock for a cleaning machine, comprising:

[0010] Locking pins are vertically installed on the upper surface of the door.

[0011] A locking component is located on the top of the main body of the cleaning machine and is used to engage with the locking pin to lock the door. The locking component is located on the top of the main body of the cleaning machine and can be flipped up and down. The front end of the locking component has a locking slot that can grip the locking pin.

[0012] A first torsion spring, connected to the locking member, is used to keep the locking member in a tendency for the lock to flip from bottom to top.

[0013] A driving component, movably disposed on the rear side of the locking component and always maintaining a forward-moving tendency, is used to provide an auxiliary flipping force for the locking component during its flipping process and to provide a position-holding force for the locking component when it is flipped into place; and

[0014] A limiting mechanism is provided on the side of the drive component, which is used to limit the drive component when the door is locked and to release the limit on the drive component when the door is automatically opened.

[0015] Preferably, the limiting mechanism includes a push rod and a push rod driving assembly. The push rod is positioned perpendicular to the movement direction of the driving member and is located on the rear side of the driving member. The push rod driving assembly drives the push rod to reciprocate perpendicular to the movement direction of the driving member. The front side of the push rod has a limiting step that abuts against the rear edge of the driving member when the push rod is pushed out and disengages from the rear edge of the driving member when the push rod returns to its original position. This structure facilitates the limiting of the position of the driving member.

[0016] Preferably, the push rod driving assembly is an electromagnetic driving assembly, including a first elastic element that keeps the push rod in the pushing tendency when the power is off, and an electromagnetic coil that can drive the push rod to overcome the elastic force of the first elastic element and reset when the power is on.

[0017] Preferably, the system further includes a first signal switch capable of transmitting a closing signal to the controller when the door is closed. This first signal switch is linked to the push rod. When the door is closed, the push rod remains in the extended state, limiting the drive component and driving the first signal switch to close. Linking the first signal switch to the push rod indirectly achieves the detection of the closing signal, making the overall structure more compact and ensuring accurate detection.

[0018] Preferably, the first signal switch includes a first micro switch, a push plate, and a second elastic element. The trigger point of the first micro switch is arranged facing forward. The push plate is movably disposed next to the first micro switch and has a first part corresponding to the trigger point and a second part for linkage with the push rod. The second elastic element is disposed on the rear side of the push plate and makes the push plate always maintain a forward moving trend.

[0019] Preferably, the push plate has an L-shaped structure, the horizontal part of the L-shaped structure constitutes the first part and is located in front of the first micro switch, the vertical part of the L-shaped structure extends back and forth close to the side wall of the first micro switch, and the outer side wall of the vertical part of the L-shaped structure has a sliding groove that guides and cooperates with the end of the push rod.

[0020] Preferably, the rear wall of the groove is formed as a first inclined surface that slopes from the inside out and from front to back, and correspondingly, at least the rear part of the end face of the first end of the push rod is formed as a second inclined surface that matches the first inclined surface. This structure allows the push plate and the push rod to slide together, improving the fitting accuracy.

[0021] Preferably, the device further includes an arc-shaped hook and a second torsion spring. The upper end of the arc-shaped hook is rotatably constrained to the side of the locking member, and the second torsion spring ensures that the lower end of the arc-shaped hook always presses against the inner wall of the door. During the automatic opening process, the locking member, under the action of the first torsion spring, is released from its limiting position with the locking pin, and further changes the force relationship between the locking member and the driving member. That is, the force exerted by the driving member on the locking member changes from driving it to flip downwards to flipping upwards. During this process, the arc-shaped hook, under the action of the second torsion spring, assists the action of the locking member to improve the reliability of the automatic opening.

[0022] Preferably, in the closed state, the lower back of the arc-shaped hook abuts against the front end surface of the push plate to drive the first signal switch to close; in the open state, the arc-shaped hook disengages from the push plate and extends beyond the opening of the main body of the cleaning machine.

[0023] For ease of installation, a mounting bracket is provided on the rear side of the drive component. The drive component is movably mounted on the front of the mounting bracket. A baffle is provided in the mounting bracket on the rear side of the drive component. A third elastic member is provided between the rear of the drive component and the baffle to keep the drive component moving forward.

[0024] Preferably, a gap is formed between the lower part of the baffle and the lower rear part of the drive member for the push rod to pass through.

[0025] Preferably, the mounting bracket is movably disposed on the rear side of the locking member, the push rod is movably connected to the output end of the push rod drive assembly, and a fourth elastic element is provided on the rear side of the baffle to ensure that the mounting bracket always maintains a forward moving trend. This structure is designed to eliminate interference between manual opening and automatic door opening. When the door is opened manually, the push rod is in a state of limiting the drive member. At this time, the mounting bracket moves backward as a whole, and the push rod moves backward in coordination to complete the manual door opening action without affecting the coordination relationship of each component.

[0026] To improve assembly reliability, the mounting bracket has a mounting compartment located near the push rod drive assembly on its side. The second end of the push rod passes through this mounting compartment and has a sliding track extending forward and backward. The output end of the push rod drive assembly slides into the sliding track of the push rod. Preferably, the outer end of the sliding track is surrounded by the side wall of the mounting compartment.

[0027] Preferably, the locking element has a C-shaped structure, with a rearwardly extending trigger arm on its back. Correspondingly, the front end face of the driving element is formed into a V-shaped structure with the tip extending forward. The trigger arm is guided and engaged with the two inclined surfaces corresponding to the V-shaped structure. This structure facilitates the conversion of the force relationship between the locking element and the driving element when the door is open or closed. Thus, when the door is open, the locking element is limited to an upward-flipped state to prevent it from flipping downward and affecting the next closing action; when the door is closed, the locking element is limited to a downward-flipped state to prevent it from flipping upward and affecting the locking, and the locking seal between the door and the main body of the washing machine is maintained.

[0028] Preferably, a second signal switch is provided on the side of the trigger arm, which can transmit a closing signal to the controller when the door is closed, and the second signal switch is linked to the trigger arm.

[0029] Preferably, the second signal switch includes a second micro switch and a trigger rod. The trigger point of the second micro switch is arranged facing the side wall of the trigger arm. The trigger rod is movable back and forth and is located outside the trigger point of the second micro switch and extends into the trigger arm. The side of the trigger arm is provided with a sloping protrusion. Correspondingly, the end of the trigger rod is provided with a guide slope that can cooperate with the sloping protrusion when the door is closed.

[0030] A cleaning machine includes a main body and a door. The main body has a washing chamber and an opening on the side that communicates with the washing chamber. The lower edge of the door is rotatably connected to the lower edge of the opening of the main body. The machine also includes a door lock, which is located on the top of the machine and is used to lock or unlock the top of the main body and the top of the door.

[0031] Compared with the prior art, the advantages of the present invention are as follows: In the closed state, the locking member rotates to the lock mouth to grasp the lock pillar, and the driving member keeps the locking member in this state. In the open state, the locking member rotates to the lock mouth to disengage from the lock pillar and is located above the main body of the cleaning machine, and the driving member keeps the locking member in this state, thereby improving the stability in the open and closed states. The locking member of the present invention always maintains the opening trend. When the door is closed, the driving member is limited, and the locking member cannot move, thus ensuring the reliability of closing. When the door is opened automatically, the limiting mechanism cancels the limitation on the driving member, and the locking member can automatically disengage from the lock pillar to open the door to a certain angle, which facilitates the release of steam and avoids the user being burned by high-temperature steam. Attached Figure Description

[0032] Figure 1 This is a partial structural diagram of the cleaning machine according to an embodiment of the present invention (during the initial closing process);

[0033] Figure 2 This is a partial structural diagram of the cleaning machine according to an embodiment of the present invention (with the door closed);

[0034] Figure 3 This is a partial structural schematic diagram of the cleaning machine according to an embodiment of the present invention (with the door open);

[0035] Figure 4 This is a cross-sectional view of the cleaning machine according to an embodiment of the present invention;

[0036] Figure 5 This is a schematic diagram of the door lock structure according to an embodiment of the present invention;

[0037] Figure 6 for Figure 5 A schematic diagram of the bottom structure;

[0038] Figure 7 This is a schematic diagram of the upper part of the hidden housing of the door lock according to an embodiment of the present invention;

[0039] Figure 8 This is a cross-sectional view of a door lock according to an embodiment of the present invention;

[0040] Figure 9 This is a schematic diagram of the locking component according to an embodiment of the present invention;

[0041] Figure 10 This is a schematic diagram of the structure of the driving component according to an embodiment of the present invention. Detailed Implementation

[0042] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0043] The door lock for the cleaning machine in this embodiment can be used on a dishwasher or other containers with the same door locking requirements as in this embodiment. This embodiment uses a cleaning machine as an example for explanation.

[0044] like Figures 1-10 As shown, the cleaning machine in this embodiment includes a main body 1 and a door 2. The main body 1 has a washing chamber 11 and an opening 12 on its side that communicates with the washing chamber 11. The lower edge of the door 2 is rotatably connected to the lower edge of the opening 12 of the main body 1. When the door is closed, at least the inner part of the door 2 is embedded in the opening 12 of the main body 1. A door lock 3 is provided on the top of the cleaning machine for locking or unlocking the top of the main body 1 and the top of the door 2.

[0045] In this embodiment, as Figures 5-10 As shown, the door lock 3 includes a locking pin 31, a locking element 32, a first torsion spring 10, a driving element 33, and a limiting mechanism 34. All components of the door lock 3 are installed in a flat housing 35. During the opening process, the locking element 32, which needs to cooperate with the door body 2, is partially exposed below the housing 35. The locking pin 31 is vertically positioned on the upper surface of the door body 2. The locking element 32 is located at the top of the cleaning machine body 1 and is used to engage with the locking pin 31 to lock the door body 2. The locking element 32 is rotatably mounted on the top of the cleaning machine body 1, and is rotatably connected to the housing 35 via shafts on both sides. An opening 351 is provided on the bottom wall of the housing 35 for the locking element 32 to partially rotate below the housing 35. The front end of the locking element 32 has a locking slot 321 that can grip the locking pin 31. The first torsion spring 10 is connected to a shaft on one side of the locking element 32, ensuring that the locking element 32 always maintains a downward rotating locking slot 321. The driving member 33 is movably disposed behind the locking member 32 and always maintains a forward-moving tendency. It is used to provide auxiliary flipping force for the locking member 32 during flipping and to provide position holding force for the locking member 32 when it is flipped into place. The limiting mechanism 34 is disposed beside the driving member 33 and is used to limit the driving member 33 when the door is locked and to release the limit on the driving member 33 when the door is automatically opened.

[0046] In the closed state, the locking member 32 rotates to the lock jaw 321 to grip the lock pin 31, and the driving member 33 keeps the locking member 32 in this state. In the open state, the locking member 32 rotates to the lock jaw 321 to disengage from the lock pin 31 and is positioned above the main body 1 of the cleaning machine, and the driving member 33 keeps the locking member 32 in this state, thereby improving the stability in both the open and closed states. The locking member 32 always maintains an open tendency. When the door is closed, the driving member 33 is limited, and the locking member 32 cannot move, ensuring the reliability of the closing. When the door is automatically opened, the limiting mechanism 34 releases the limit on the driving member 33, and the locking member 32 can automatically disengage from the lock pin 31, opening the door 2 at a certain angle to facilitate the release of steam and prevent the user from being burned by high-temperature steam.

[0047] In this embodiment, the limiting mechanism 34 includes a push rod 341 and a push rod driving assembly 342. The push rod 341 is arranged perpendicular to the moving direction of the driving member 33 and is located on the rear side of the driving member 33. The push rod driving assembly 342 is used to drive the push rod 341 to reciprocate perpendicular to the moving direction of the driving member 33. The front side of the push rod 341 has a limiting step 3411 that can abut against the rear edge of the driving member 33 when the push rod 341 is pushed out and disengage from the rear edge of the driving member 33 when the push rod 341 is reset. With the above structure, it is convenient to limit the position of the driving member 33.

[0048] The aforementioned push rod drive assembly 342 is an electromagnetic drive assembly, including a first elastic element 3421 (which is a spring) that keeps the push rod 341 in the pushing trend when the power is off, and an electromagnetic coil 3422 that can drive the push rod 341 to overcome the elastic force of the first elastic element 3421 and reset when the power is on. The specific matching structure is a mature existing technology and will not be described in detail here.

[0049] This embodiment includes a first signal switch 100 that transmits a door-closing signal to the controller when the door is closed. This first signal switch 100 is linked to a push rod 341. When the door is closed, the push rod 341 remains extended, limiting the drive component 33 and driving the first signal switch 100 to close. Linking the first signal switch 100 to the push rod 341 indirectly achieves the detection of the door-closing signal, making the overall structure more compact and ensuring accurate detection.

[0050] The aforementioned first signal switch 100 includes a first micro switch 101, a push plate 102, and a second elastic element 103 (a spring). The trigger point 1011 of the first micro switch 101 is arranged facing forward. The push plate 102 is movably disposed on the side of the first micro switch 101 and has a first part corresponding to the trigger point and a second part for linkage with the push rod 341. The second elastic element 103 is disposed on the rear side of the push plate 102 and makes the push plate 102 always maintain a forward moving tendency.

[0051] The aforementioned push plate 102 has an L-shaped structure. The horizontal portion of this L-shaped structure forms the first part, located on the front side of the first micro switch 101. The vertical portion of this L-shaped structure extends back and forth close to the side wall of the first micro switch 101. A groove 104 is formed on the outer wall of the vertical portion of the L-shaped structure to guide and engage with the end of the push rod 341. The rear wall of the groove 104 is formed as a first inclined surface 105, sloping from the inside out and from front to back. Correspondingly, at least the rear portion of the end face of the first end of the push rod 341 is formed as a second inclined surface 3412 that matches the first inclined surface 105. This structure allows the push plate 102 and the push rod 341 to slide together, improving the engagement accuracy.

[0052] In this embodiment, an arc-shaped hook 36 and a second torsion spring 20 are provided to provide auxiliary force for automatic door opening. The upper end of the arc-shaped hook 36 is rotatably constrained in the housing 35 beside the locking member 32 via a pivot. The second torsion spring 20 is connected to a shaft on one side of the arc-shaped hook 36, so that the arc-shaped hook 36 always maintains a tendency for its lower end to press against the inner wall of the door body 2. During the automatic door opening process, the locking member 32 is released from its limiting position with the locking pin 31 under the action of the first torsion spring 10, and further cooperates with the driving member 33 to change the force relationship between them. That is, the force given to the locking member 32 by the driving member 33 changes from driving it to flip downwards to flipping upwards. During this process, the arc-shaped hook 36 provides assistance to the action of the locking member 32 under the action of the second torsion spring 20, thereby improving the reliability of automatic door opening.

[0053] When the door is closed, the lower back of the arc-shaped hook 36 abuts against the front end face of the push plate 102, thereby driving the first signal switch 100 to close. When the door is open, the arc-shaped hook 36 disengages from the push plate 102 and extends beyond the opening 12 of the main body 1 of the cleaning machine, and the bottom of the housing 35 has an opening for the arc-shaped hook 36 to protrude below the housing 35.

[0054] In this embodiment, a mounting bracket 37 is provided on the rear side of the drive member 33. The drive member 33 is movably mounted on the front of the mounting bracket 37. A baffle 371 is provided in the mounting bracket 37 on the rear side of the drive member 33. A third elastic member 330 (a spring) is provided between the rear part of the drive member 33 and the baffle 371 to keep the drive member 33 moving forward. A gap is formed between the lower part of the baffle 371 and the lower rear part of the drive member 33 for the push rod 341 to pass through.

[0055] The mounting bracket 37 is movably positioned behind the locking member 32 and constrained within the housing 35. The push rod 341 is movably connected to the output end of the push rod drive assembly 342. A fourth elastic member 372 (a spring) is provided behind the baffle 371 to maintain the forward-moving tendency of the mounting bracket 37. This structure is designed to eliminate interference between manual operation and automatic door opening. When the door is opened manually, the push rod 341 is in a state of limiting the drive member 33. At this time, the mounting bracket 37 moves backward as a whole, and the push rod 341 moves backward in coordination to complete the manual door opening action without affecting the coordination relationship of the components.

[0056] To improve assembly reliability, a mounting compartment 373 is provided on the side of the mounting bracket 37, close to the push rod drive assembly 342. The second end of the push rod 341 passes through the mounting compartment 373 and is provided with a sliding track 343 extending back and forth. The output end of the push rod drive assembly 342 slides in engagement with the sliding track 343 of the push rod 341. The outer port of the sliding track 343 is surrounded by the side wall of the mounting compartment 373.

[0057] In this embodiment, the locking member 32 has a C-shaped structure, and the back of the locking member 43 is provided with a rearwardly extending trigger arm 322. Correspondingly, the front end face of the driving member 33 is formed into a V-shaped structure 331 with the tip extending forward. The trigger arm 322 is guided and engaged with the two inclined surfaces corresponding to the V-shaped structure. This structure facilitates the conversion of the force relationship between the locking member 32 and the driving member 33 in the opening and closing states. Thus, in the opening state, the locking member 32 is limited to the upward flipped state to prevent it from flipping downward and affecting the next closing action; in the closing state, the locking member 32 is limited to the downward flipped state to prevent it from flipping upward and affecting the locking, and maintains the locking and sealing between the door body 2 and the main body 1 of the cleaning machine.

[0058] A second signal switch 200 is provided on the side of the trigger arm 322, which can transmit a closing signal to the controller when the door is closed. The second signal switch 200 is linked with the trigger arm 322. The second signal switch 200 includes a second micro switch 201 and a trigger rod 202. The trigger point of the second micro switch 201 is arranged facing the side wall of the trigger arm 322. The trigger rod 202 is movably disposed outside the trigger point of the second micro switch 201 and extends towards the trigger arm 322. The side of the trigger arm 322 is provided with a sloping protrusion 323. Correspondingly, the end of the trigger rod 202 is provided with a guide slope 203 that can cooperate with the sloping protrusion 323 when the door is closed.

[0059] The door opening and closing process in this embodiment is as follows:

[0060] The closing process is manual: push the door body 2 inward, the locking pin 31 contacts the lock opening 321 of the locking member 32, the locking pin 31 presses against the rear wall of the lock opening 321, and under the pushing action, the locking member 32 is driven to overcome the elastic force behind the driving member 33 and flip downward until the mating surface of the trigger arm 322 and the front end of the driving member 33 changes from the upper slope to the lower slope. Continue to push the door body 2 until the lock opening 321 of the locking member 32 completely grasps the locking pin 31; at this time, the lower end of the arc-shaped hook 36 abuts against the upper surface of the door body 2 and will not push the door body 2 outward, and will not affect the sealing of the door body 2;

[0061] After the door is closed, both the first signal switch 100 and the second signal switch 200 are closed, transmitting signals to the controller, and the cleaning machine can then perform the cleaning operation.

[0062] The door opening process can be either manual or automatic. When opening manually:

[0063] Pulling the door 2 outward causes the trigger arm 322 at the rear of the locking member 32 to flip upward against the elastic force behind the driving member 33, until the mating surface between the trigger arm 322 and the front end of the driving member 33 changes from a lower slope to an upper slope. At this time, under the action of the first torsion spring 10, the locking member 32 has an upward flipping tendency. Under the action of the second torsion spring 20, the lower end of the arc-shaped hook 36 abuts against the inner wall of the door 2, maintaining the tendency to push the door 2 outward, which can open the door 2 with very little effort. During the above process, when the driving member 33 moves backward under the action of the opening force, the entire mounting bracket 37, push rod 341, and driving member 33 all move backward.

[0064] When the door opens automatically:

[0065] When the push rod drive assembly 342 is energized, the push rod 341 is pulled back, canceling the limiting step 3411's restriction on the drive member 33. Under the action of the first torsion spring 10, the drive member 33 moves backward on the mounting bracket 37 by the upward flipping of the locking member 32, until the mating surface between the trigger arm 322 and the front end of the drive member 33 changes from a lower inclined surface to an upper inclined surface. At this time, the lower end of the arc-shaped hook 36 abuts against the inner wall of the door body 2, maintaining the tendency to push the door body 2 outward, further opening the door body 2 at an angle and releasing high-temperature steam.

[0066] The specification and claims of this invention use terms indicating direction, such as "front," "rear," "upper," "lower," "left," "right," "side," "top," and "bottom," to describe various exemplary structural parts and elements of the invention. However, these terms are used herein merely for ease of explanation and are determined based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in this invention can be arranged in different orientations, these terms indicating direction are for illustrative purposes only and should not be considered as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

Claims

1. A door lock for a cleaning machine, characterized in that: include Locking post (31) is vertically installed on the upper surface of the door body (2); A locking element (32) is provided on the top of the main body (1) of the cleaning machine and is used to lock the door (2) by inserting and cooperating with the locking pin (31). The locking element (32) is provided on the top of the main body (1) of the cleaning machine and the front end of the locking element (32) has a locking slot (321) that can grip the locking pin (31). A first torsion spring (10) is connected to the locking member (32) to keep the locking member (32) always in the tendency of the lock opening (321) to flip from bottom to top; The driving member (33) is movably disposed on the rear side of the locking member (32) and always maintains a forward moving trend. It is used to provide an auxiliary flipping force for the locking member (32) during the flipping process and to provide a position holding force for the locking member (32) when it is flipped into place. as well as A limiting mechanism (34) is provided on the side of the drive member (33) for limiting the drive member (33) in the locked state and canceling the limiting of the drive member (33) when the door is automatically opened; An arc-shaped hook (36) is provided, the upper end of which is rotatably constrained to the side of the locking member (32); The second torsion spring (20) ensures that the arc-shaped hook (36) always maintains the tendency of its lower end to press against the inner wall of the door. During the automatic door opening process, the locking member is released from its limit by the locking column under the action of the first torsion spring, and further changes the force relationship between the locking member and the driving member. That is, the force given to the locking member by the driving member changes from driving it to flip downward to flip upward. During this process, the arc-shaped hook provides assistance to the action of the locking member under the action of the second torsion spring.

2. The door lock for a cleaning machine according to claim 1, characterized in that: The limiting mechanism (34) includes a push rod (341) and a push rod drive assembly (342). The push rod (341) is arranged on the rear side of the drive member (33) in the direction of movement of the drive member (33). The push rod drive assembly (342) is used to drive the push rod (341) to move back and forth in the direction of movement of the drive member (33). The front side of the push rod (341) has a limiting step (3411) that can abut against the rear edge of the drive member (33) when the push rod (341) is pushed out and disengage from the rear edge of the drive member (33) when the push rod (341) is reset.

3. The door lock for a cleaning machine according to claim 2, characterized in that: The push rod drive assembly (342) is an electromagnetic drive assembly, including a first elastic element (3421) that keeps the push rod (341) in the push-out tendency when the power is off, and an electromagnetic coil (3422) that can drive the push rod (341) to overcome the elastic force of the first elastic element (3421) and reset when the power is on.

4. The door lock for a cleaning machine according to claim 2, characterized in that: It also includes a first signal switch (100) that can transmit a closing signal to the controller when the door is closed. The first signal switch (100) is linked to the push rod (341). When the door is closed, the push rod (341) remains in the extended state, limiting the drive member (33) and driving the first signal switch (100) to close.

5. The door lock for a cleaning machine according to claim 4, characterized in that: The first signal switch (100) includes a first micro switch (101), a push plate (102) and a second elastic member (103). The trigger point of the first micro switch (101) is arranged facing forward. The push plate (102) is movably disposed next to the first micro switch (101) and has a first part corresponding to the trigger point and a second part for linkage with the push rod (341). The second elastic member (103) is disposed on the rear side of the push plate (102) and makes the push plate (102) always maintain a forward moving tendency.

6. The door lock for a cleaning machine according to claim 5, characterized in that: The push plate (102) has an L-shaped structure. The horizontal part of the L-shaped structure constitutes the first part and is located in front of the first micro switch (101). The vertical part of the L-shaped structure extends back and forth close to the side wall of the first micro switch (101). A groove (104) is opened on the outer side wall of the vertical part of the L-shaped structure to guide and cooperate with the end of the push rod (341).

7. The door lock for a cleaning machine according to claim 6, characterized in that: The rear wall of the groove (104) is formed as a first inclined surface (105) that slopes from the inside out and from front to back. Correspondingly, the end face of the first end of the push rod (341) is formed at least at the rear as a second inclined surface (3412) that matches the first inclined surface (105).

8. The door lock for a cleaning machine according to claim 5, characterized in that: In the closed state, the lower back of the arc-shaped hook (36) abuts against the front end surface of the push plate (102) to drive the first signal switch (100) to close. In the open state, the arc-shaped hook (36) disengages from the push plate (102) and extends beyond the opening of the main body of the cleaning machine.

9. The door lock for a cleaning machine according to claim 2, characterized in that: A mounting bracket (37) is provided on the rear side of the drive member (33). The drive member (33) is movably disposed at the front of the mounting bracket (37). A baffle (371) is provided in the mounting bracket (37) located on the rear side of the drive member (33). A third elastic member (370) is provided between the rear part of the drive member (33) and the baffle (371) to keep the drive member (33) moving forward.

10. The door lock for a cleaning machine according to claim 9, characterized in that: A gap is formed between the lower part of the baffle (371) and the lower rear part of the drive member (33) for the push rod (341) to pass through.

11. The door lock for a cleaning machine according to claim 10, characterized in that: The mounting bracket (37) is movably disposed on the rear side of the locking member (32), the push rod (341) is movably connected to the output end of the push rod drive assembly (342), and a fourth elastic member (372) is provided on the rear side of the baffle (371) to keep the mounting bracket (37) always moving forward.

12. The door lock for a cleaning machine according to claim 11, characterized in that: The mounting bracket (37) has a mounting compartment (373) arranged near the push rod drive assembly (342) on its side. The second end of the push rod (341) passes through the mounting compartment (373) and is provided with a slide rail (343) extending forward and backward. The output end of the push rod drive assembly (342) slides in cooperation with the slide rail (343) of the push rod (341).

13. The door lock for a cleaning machine according to claim 12, characterized in that: The outer port of the slide (343) is surrounded by the side wall of the installation chamber (373).

14. The door lock for a cleaning machine according to any one of claims 1 to 13, characterized in that: The locking member (32) has a C-shaped structure. The back of the locking member (32) is provided with a rearwardly extending trigger arm (322). Correspondingly, the front end face of the driving member (33) is formed into a V-shaped structure with the tip extending forward. The trigger arm (322) is guided and engaged with the two inclined surfaces corresponding to the V-shaped structure.

15. The door lock for a cleaning machine according to claim 14, characterized in that: A second signal switch (200) is provided on the side of the trigger arm (322) to transmit a closing signal to the controller when the door is closed. The second signal switch (200) is linked to the trigger arm (322).

16. The door lock for a cleaning machine according to claim 15, characterized in that: The second signal switch (200) includes a second micro switch (201) and a trigger rod (202). The trigger point of the second micro switch (201) is arranged facing the side wall of the trigger arm (322). The trigger rod (202) is movably disposed outside the trigger point of the second micro switch (201) and extends towards the trigger arm (322). The side of the trigger arm (322) is provided with a sloping protrusion (323). Correspondingly, the end of the trigger rod (202) is provided with a guide slope (203) that can cooperate with the sloping protrusion (323) in the closed state.

17. A cleaning machine, comprising a cleaning machine body (1) and a door (2), wherein the cleaning machine body (1) has a washing chamber (11) and an opening (12) communicating with the washing chamber (11) on its side, and the lower edge of the door (2) is rotatably connected to the lower edge of the opening (12) of the cleaning machine body (1), characterized in that: It also includes a door lock as described in any one of claims 1 to 16, the door lock being located on the top of the cleaning machine for locking or unlocking the top of the cleaning machine body (1) and the top of the door (2).

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