Door lock for cleaning machine and cleaning machine

Abstract

The present invention relates to a door lock for a cleaning machine and a cleaning machine. The door lock comprises a lock groove, a locking member and a pushing block. The present invention sets the force and force matching surfaces in the door closing process as two groups staggered front and back. The first guide surface and the second guide surface located on the rear side are used to push the locking member to flip forward after the door is closed. The third guide surface and the fourth guide surface located on the front side are used to limit the position of the locking member in the door open state. Since the rotational torque of the friction force corresponding to the third guide surface is greatly reduced, the force to be overcome in the door closing process is correspondingly reduced, which has the effect of saving effort in closing the door. After the door is closed, the rotational torque of the friction force corresponding to the first guide surface is relatively large, and a relatively large forward flipping force can still be applied to the locking member, so that the locking member can grip the lock groove, maintain a relatively large gripping force on the door body, and improve the sealing of the door body.

Description

Technical Field

[0001] The invention relates to the technical field of dishwashers, and in particular to a door lock for a washing machine and a washing machine. Background Art

[0002] A dishwasher generally includes a body and a door. The body has a hollow washing cavity. An opening is provided on the front side of the body to open the washing cavity. The door is provided on the front side of the body and is used to open or close the opening. When the door is closed, it is usually necessary to lock the door to the body with a door lock to ensure that the door will not be opened during use of the dishwasher.

[0003] The Chinese utility model patent "A door lock structure of a dishwasher and a dishwasher using the door lock structure" (application number: CN202021963616.6) with authorization announcement number CN214035161U discloses a door lock structure for locking a door body, which includes a door body of the dishwasher and a lock tongue for locking the door body, a buckle seat that cooperates with the position of the lock tongue is provided on the outside of the door body, and the lock tongue can be moved to the buckle seat and buckled with the buckle seat to lock the door body; an installation hole is provided on the door body, and a fixing part for fixing the buckle seat is provided on the inside of the door body, and the buckle seat is provided with a connecting part that can be inserted into the door body through the installation hole, and the connecting part is connected to the fixing part to fix the buckle seat on the door body.

[0004] Although the above structure is convenient for locking the door body on the main body, after the lock tongue is buckled into the pit, the lock tongue is accommodated in the pit and has no force on the door body, and it is difficult to achieve a good seal between the door body and the main body. The door body may even be naturally turned outward with its bottom rotating shaft as support, which will adversely affect the seal between the door body and the main body.

[0005] In order to solve the above problems, the applicant's prior application 202210046983.7 "Door lock and cleaning machine for cleaning machine" discloses a structure, which is provided with a locking piece that cooperates with the top lock groove of the door body. In the closed state, the lock hook of the locking piece flips downward to cooperate with the lock groove, and the pushing component always pushes the rear end of the locking piece forward so that the lock hook and the inner wall of the lock groove are tightly hooked, so that the door body always maintains a force pressing in the direction of the cleaning machine body, thereby improving the sealing between the door body and the body. However, the applicant found that during the door closing process, due to the limitation of the locking piece structure, the friction torque of the locking piece during the rotation process is relatively large, which causes consumers to still need to exert a large closing force to lock the door body, which affects the user experience to a certain extent. 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 saves effort in the door closing process and always maintains tension on the door body in the locked state, thereby improving the sealing between the door body and the main body.

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

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

[0009] A door lock for a washing machine, comprising a lock slot and a locking member, wherein the lock slot is arranged on the upper surface of the door body, the locking member is arranged on the top of the washing machine body and is used to engage with the lock slot to lock the door body, the locking member is arranged on the top of the washing machine body so as to be flippable forward and backward, and further comprises a pushing block which can move forward and backward, the pushing block is arranged on the rear side of the locking member and always maintains a tendency to move forward, and is used to limit the position of the locking member in a locked or unlocked state;

[0010] A first guide surface is formed at the rear end of the locking piece, and a second guide surface is formed at the front end of the pushing block, which can press forward against the first guide surface when the door is locked; a local area at the rear end of the locking piece is recessed forward to form a third guide surface, and a local area at the front end of the pushing block is protruding forward to form a fourth guide surface that can be frictionally limited with the third guide surface in the door opening state and frictionally slide with the third guide surface during the door closing process.

[0011] Preferably, the maximum distance from the first guide surface to the rotation axis of the locking member is L1, and the maximum distance from the third guide surface to the rotation axis of the locking member is L2, L1>L2. The torque of friction during the door closing process of the prior application 202210046983.7 is L1, and the torque of friction during the door closing process of the present invention is L2. The present invention reduces the torque of friction, thereby making the door closing force smaller, achieving the effect of saving effort in door closing.

[0012] Preferably, at least part of the first guide surface is a first arc surface that arches outwards, the outer edge of the first arc surface section is located on a circumferential surface with the rotation axis of the locking member as the center, and the distance from the outer edge of the first arc surface section to the rotation axis of the locking member as the center is L1. Preferably, at least part of the third guide surface is a second arc surface that arches outwards, the outer edge of the second arc surface section is located on a circumferential surface with the rotation axis of the locking member as the center, and the distance from the outer edge of the second arc surface section to the rotation axis of the locking member as the center is L2. The cooperation of the arc surface with other surfaces can improve the friction cooperation effect.

[0013] In the present invention, the rear end of the locking member is provided with a groove that is recessed forward, and correspondingly, the front end of the pushing block is provided with a protrusion that extends forward and can be inserted into the groove, the inner end surface of the groove constitutes the third guide surface, and the fourth guide surface is formed on the front end surface of the protrusion. In order to take into account the cooperation between the first guide surface and the second guide surface, and the cooperation between the third guide surface and the fourth guide surface, the above structure is provided, and the cooperation structure between the first guide surface and the second guide surface, and the cooperation structure between the third guide surface and the fourth guide surface are arranged in an interlaced manner front and back, so as to meet the limit or cooperation requirements of the door lock in different states.

[0014] Preferably, the fourth guide surface is a first vertical surface extending upward from the lower edge of the protrusion, and at least a portion of the third guide surface is a second arc surface arched outward. In the door-open state, the second arc surface and the first vertical surface are frictionally limited; in the door-closing process, the second arc surface and the first vertical surface are frictionally slidably matched, and there is a gap between the first guide surface and the second guide surface; in the door-closing state, the second arc surface is disengaged from the first vertical surface, and the first guide surface and the second guide surface are pressed and matched.

[0015] Preferably, the front end face of the pushing block is formed with a second vertical face and a third arc face which are connected in sequence from top to bottom, and the third arc face is recessed rearwardly relative to the second vertical face. During the door closing process, the first guide face corresponds to the third arc face; in the door closing state, the lower edge of the first guide face is pressed and fitted against the second vertical face.

[0016] As an improvement, a switching structure is provided between the third guide surface and the fourth guide surface of the locking member, which can switch the force position of the push block exerting force on the locking member from the third guide surface to the first guide surface during the door closing process. This structure can achieve: during the door closing process, there is no interference between the first guide surface and the second guide surface, saving effort; after the door is closed, there is no interference between the third guide surface and the fourth guide surface, so that the locking body maintains a tendency to flip forward, thereby improving the sealing performance in the closed state.

[0017] Preferably, a front end surface of the protrusion is formed with a clearance area which is gradually recessed upward and backward from the upper edge of the first vertical surface, and the clearance area cooperates with the lower edge of the second arc surface to form the switching structure.

[0018] Further preferably, a guiding inclined surface extending upward and backward from the upper edge of the first vertical surface is formed in the middle of the front end surface of the protrusion, and a plane smoothly connected to the lower edge of the second arc surface is provided at the bottom of the rear end of the locking piece. In the closed state,

[0019] When the lower edge of the third guide surface corresponds to the upper edge of the first vertical surface, the lower edge of the first guide surface corresponds to the upper edge of the third arc surface with a gap therebetween;

[0020] When the lower edge of the third guide surface is located above the first vertical surface and the plane and the guide inclined surface are initially matched, the lower edge of the first guide surface corresponds to the lower edge of the second vertical surface and the gap between the two gradually decreases;

[0021] When the lower edge of the first guide surface contacts and presses against the second vertical surface, a matching gap is formed between the plane of the locking member and the guide inclined surface. The above structure can achieve: no interference between the first guide surface and the second guide surface during the door closing process, saving effort; after the door is closed, no interference between the third guide surface and the fourth guide surface, so that the locking body maintains a tendency to flip forward, thereby improving the sealing performance in the closed state.

[0022] Preferably, the cross section of the third arc surface is two arc segments connected to each other, or the cross section of the third arc surface is an arc segment or a vertical line segment connected up and down.

[0023] Preferably, a locking hook bent downward is provided at the front end of the locking member, and the door lock further comprises:

[0024] A trigger assembly is arranged beside the locking member and is used to provide the locking member with a force to flip forward so that the lock hook is hooked into the lock slot during the door closing process;

[0025] The driving assembly is arranged beside the locking member and is used to provide the locking member with power to flip backwards and lift the locking hook upwards when the locking hook is out of the locking groove during the door opening process.

[0026] A cleaning machine comprises a cleaning machine body and a door body, wherein the cleaning machine body has a washing chamber and an opening on the side which is connected to the washing chamber, the lower edge of the door body is rotatably connected to the lower edge of the opening of the cleaning machine body, and also comprises the above-mentioned door lock, which is arranged at the top of the cleaning machine and is used to lock or unlock the top of the cleaning machine body and the top of the door body.

[0027] Compared with the prior art, the advantages of the present invention are: the present invention sets the force and force matching surfaces in the door closing process into two groups staggered front and back, the first guide surface and the second guide surface located on the rear side are used to push the locking piece to flip forward after the door is closed, and the third guide surface and the fourth guide surface located on the front side are used to limit the position of the locking piece in the door open state. Since the turning torque of the friction force corresponding to the third guide surface is greatly reduced, the force to be overcome in the door closing process is correspondingly reduced, which has the effect of saving effort in closing the door. After the door is closed, the turning torque of the friction force corresponding to the first guide surface is relatively large, and a large forward flipping force can still be applied to the locking piece, so that the locking piece can grasp the lock groove, maintain a large gripping force on the door body and improve the sealing of the door body. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of a cleaning machine in an embodiment of the present invention;

[0029] Figure 2 for Figure 1 A cross-sectional view of

[0030] Figure 3 This is a schematic diagram of the structure of a door lock in an embodiment of the present invention;

[0031] Figure 4 for Figure 3 Schematic diagram of the bottom structure;

[0032] Figure 5 It is a schematic diagram of the matching structure of the locking member and the pushing block in an embodiment of the present invention;

[0033] Figure 6 It is a schematic diagram of the structure of a locking member in an embodiment of the present invention;

[0034] Figure 7 It is a structural schematic diagram of a pushing block in an embodiment of the present invention;

[0035] Figure 8 FIG. 1 is a diagram showing the matching state of the locking member and the pushing block in an embodiment of the present invention (door opening state);

[0036] Fig. 9 1 is a diagram showing the matching state of the locking member and the pushing block in an embodiment of the present invention (door closing process 1);

[0037] Fig.10 Diagram of the matching state of the locking member and the pushing block in the embodiment of the present invention (door opening process 2);

[0038] Fig.11 A diagram showing the matching state of the locking member and the pushing block in an embodiment of the present invention (door closed state). DETAILED DESCRIPTION

[0039] The present invention is further described in detail below with reference to the accompanying drawings.

[0040] like Figures 1 to 11 As shown, the cleaning machine of this embodiment includes a cleaning machine body 1 and a door body 2. The cleaning machine body 1 has a washing chamber 11 and an opening 12 on the side that is connected to the washing chamber 11. The lower edge of the door body 2 is rotatably connected to the lower edge of the opening 12 of the cleaning machine body 1. A door lock 3 is provided 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 body 2.

[0041] In this embodiment, the door lock 3 includes a lock slot 31, a locking member 32, a pushing assembly 33, a trigger assembly 34, and a housing 37. The locking member 32, the pushing assembly 33, and the trigger assembly 34 are all disposed in the housing 37, and a lock hook 321 of the locking member 32 and a portion of the trigger assembly 34 are exposed below the housing 37.

[0042] The lock slot 31 is arranged on the upper surface of the door body 2, the lock member 32 is arranged on the top of the cleaning machine body 1, and is used to engage with the lock slot 31 to lock the door body 2. The lock member 32 can be turned back and forth in the top shell 37 of the cleaning machine body 1, and the front end of the lock member 32 is provided with a lock hook 321 bent downward. The pushing component 33 is arranged on the rear side of the lock member 32, and is used to press the rear end of the lock member 32 forward when the lock hook 321 is turned down to engage with the lock slot 31, so that the lock hook 321 is tightly hooked with the inner wall of the lock slot 31, and to press the rear end of the lock member 32 forward when the lock hook 321 is turned up to be separated from the lock slot 31, so as to limit the position of the lock member 32. The triggering component 34 is arranged on the side of the lock member 32, and is used to provide the lock member 32 with power to turn upward during the door closing process.

[0043] The pushing assembly 33 includes a pushing block 331 and a first elastic member 332. The pushing block 331 is arranged at the rear side of the locking member 32 so as to be movable forward and backward. The first elastic member 332 is connected to the pushing block 331 and enables the pushing block 331 to always maintain a tendency to move forward. With the above structure, when the door is closed, the locking member 32 is pushed so that the lock hook 321 always hooks the door body 2 toward the main body, thereby improving the sealing between the door body and the main body.

[0044] In this embodiment, a first guide surface 301 is formed at the rear end of the locking member 32, and a second guide surface 302 is formed at the front end of the pushing block 331, which can press forward against the first guide surface 301 in the locked state; a local area of ​​the rear end of the locking member 32 is recessed forward to form a third guide surface 303, and a local area of ​​the front end of the pushing block 331 protrudes forward to form a fourth guide surface 304 which can be frictionally limited with the third guide surface 303 in the open door state and frictionally slide with the third guide surface 303 in the process of closing the door.

[0045] The maximum distance between the first guide surface 301 and the rotation axis of the locking member 32 is L1, and the maximum distance between the third guide surface 303 and the rotation axis of the locking member 32 is L2, L1>L2. The torque of friction during the door closing process in the prior application 202210046983.7 is L1, and the torque of friction during the door closing process in this embodiment is L2. This embodiment reduces the torque of friction, thereby making the door closing force smaller, achieving the effect of saving effort in door closing.

[0046] The first guide surface 301 is partially an outwardly arched first arc surface 3011, and a plane is smoothly connected or tangentially connected below the first arc surface. The outer edge of the cross section of the first arc surface 3011 is located on a circumferential surface with the rotation axis of the locking member 32 as the center, and the distance from the outer edge of the cross section of the first arc surface 3011 to the rotation axis of the locking member 32 is L1. The third guide surface 303 is partially an outwardly arched second arc surface, and the outer edge of the cross section of the second arc surface is located on a circumferential surface with the rotation axis of the locking member 32 as the center, and the distance from the outer edge of the cross section of the second arc surface to the rotation axis of the locking member 32 is L2. The coordination of the arc surface with other surfaces can improve the friction coordination effect.

[0047] In this embodiment, the rear end of the locking member 32 is provided with a groove 320 that is recessed forward, and correspondingly, the front end of the push block 331 is provided with a protrusion 3311 that extends forward and can be inserted into the groove, the inner end surface of the groove 320 constitutes the third guide surface 303, and the fourth guide surface 304 is formed on the front end surface of the protrusion 3311. In order to take into account the cooperation between the first guide surface 301 and the second guide surface 302, and the cooperation between the third guide surface 303 and the fourth guide surface 304, the above structure is provided, and the cooperation structure between the first guide surface 301 and the second guide surface 302, and the cooperation structure between the third guide surface 303 and the fourth guide surface 304 are arranged in an interlaced manner front and back, so as to meet the requirements of the door lock in different states for limiting or cooperation.

[0048] Specifically, the fourth guide surface 304 is a first vertical surface extending upward from the lower edge of the protrusion 3311. In the door opening state, the second arc surface of the third guide surface 303 is frictionally limited with the first vertical surface; in the door closing process, the second arc surface of the third guide surface 303 is frictionally slidably matched with the first vertical surface, and there is a gap between the first guide surface 301 and the second guide surface 302; in the door closing state, the second arc surface of the third guide surface 303 is separated from the first vertical surface, and the first guide surface 301 is pressed against the second guide surface 302. The front end surface of the push block 331 is formed with a second vertical surface 3312 and a third arc surface 3313 connected in sequence from top to bottom. The third arc surface 3313 is concavely arranged backward relative to the second vertical surface 3312. The cross section of the third arc surface 3313 is two arc segments connected to each other, or the cross section of the third arc surface 3313 is an arc segment or a vertical line segment connected from top to bottom. During the door closing process, the first guide surface 301 corresponds to the third arc surface 3313 ; in the door closing state, the lower edge of the first guide surface 301 is pressed and matched with the second vertical surface 302 .

[0049] A switching structure is provided between the third guide surface 303 and the fourth guide surface 304 of the locking member 32, which can switch the force position of the force applied by the push block 331 to the locking member 32 from the third guide surface 303 to the first guide surface 301 during the door closing process. A clearance area A is formed on the front end surface of the protrusion 3311, which is gradually recessed upward and backward from the upper edge of the first vertical surface. The clearance area A cooperates with the lower edge of the second arc surface of the third guide surface 303 to form a switching structure.

[0050] A guiding slope 305 is formed in the middle of the front end surface of the protrusion 3311, which extends upward and backward from the upper edge of the first vertical surface. A plane 306 smoothly connected to the lower edge of the second arc surface of the third guide surface 303 is provided at the bottom of the rear end of the locking piece 32. In the closed state, when the lower edge of the third guide surface 303 corresponds to the upper edge of the first vertical surface, the lower edge of the first guide surface 301 corresponds to the upper edge of the third arc surface 3313 and there is a gap between the two; when the lower edge of the third guide surface 303 is located above the first vertical surface and the plane 306 is initially matched with the guiding slope 305, the lower edge of the first guide surface 301 corresponds to the lower edge of the second vertical surface 302 and the gap between the two gradually decreases; when the lower edge of the first guide surface 301 contacts the second vertical surface 302 and presses against each other, a matching gap is formed between the plane 306 of the locking piece 32 and the guiding slope 305. The above structure can achieve: during the door closing process, there is no interference between the first guide surface and the second guide surface, saving effort; after the door is closed, there is no interference between the third guide surface and the fourth guide surface, so that the locking body maintains a tendency to flip forward, thereby improving the sealing performance in the closed state.

[0051] The other matching structures of this embodiment are consistent with those in the prior application 202210046983.7 and will not be elaborated here.

[0052] In this embodiment, the force and force matching surfaces in the door closing process are set into two groups staggered front and back. The first guide surface 301 and the second guide surface 302 on the rear side are used to push the locking piece 32 to flip forward after the door is closed. The third guide surface 303 and the fourth guide surface 304 on the front side are used to limit the position of the locking piece in the door open state. Since the rotational torque of the friction force corresponding to the third guide surface 303 is greatly reduced, the force that needs to be overcome in the door closing process is correspondingly reduced, which has the effect of saving effort in closing the door. After the door is closed, the rotational torque of the friction force corresponding to the first guide surface 301 is relatively large, and a large forward flipping force can still be applied to the locking piece 32, so that the locking piece 32 can grip the lock groove 31, maintain a large gripping force on the door body and improve the sealing of the door body.

[0053] Using the door lock of this embodiment:

[0054] like Figure 8As shown, in the door open state, the third guide surface 303 and the fourth guide surface 304 of the locking member 32 are pressed against each other by friction to prevent the locking member 32 from rotating counterclockwise;

[0055] When closing the door, the locking member 32 needs to be rotated counterclockwise, and the locking member 32 is pushed by the trigger assembly 34. At this time, the third guide surface 303 of the locking member 32 contacts the fourth guide surface 304 of the pushing block 331, while the first guide surface 301 does not contact the second guide surface 302. Since the third guide surface 303 of the locking member 2 is an arc surface centered on the rotation axis of the locking member 32, the thrust F of the pushing block 331 on the rotation force arm of the locking member 32 is 0, and the thrust F has no rotation torque on the locking member 32. The thrust F will generate friction when the third guide surface 303 and the fourth guide surface 304 slide relative to each other, that is, closing the door requires overcoming the rotation torque generated by the friction force F1 on the locking member 32. Since L1 becomes smaller, the rotation torque of the friction force becomes smaller, the door closing force becomes smaller, and it is more labor-saving.

[0056] When the locking member 32 overcomes the friction torque under the action of the door closing force and rotates counterclockwise by Fig. 9 After the turning point, the thrust F of the locking member 32 and the force arm of the rotation center of the locking member 32 gradually increase from 0, forming a counterclockwise rotation torque, pushing the locking member 32 to rotate counterclockwise;

[0057] like Fig.10 At this time, the force that pushes the locking member 32 to rotate counterclockwise is the guiding inclined surface 305, and the force-bearing surface between the locking member 32 and the pushing block 331 gradually changes from the cooperation between the third guiding surface 303 and the fourth guiding surface 304 to the cooperation between the first guiding surface 301 and the second guiding surface 302;

[0058] like Fig.11 , the door is closed, and the lower end of the first guide surface 301 of the locking member 32 is pressed against the second guide surface 302, and the thrust F of the push block 331 and the long force arm formed by the center of the rotating shaft of the locking member 32 maintain a large locking force.

[0059] In the specification and claims of the present invention, terms indicating directions, such as "front", "rear", "up", "down", "left", "right", "side", "top", "bottom", etc., are used to describe various exemplary structural parts and elements of the present invention, but these terms are used here only for the purpose of convenience of description and are determined based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in the present invention can be arranged in different directions, these terms indicating directions are only used as explanations and should not be regarded as limitations. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

Claims

1. A door lock for a cleaning machine, comprising a lock slot (31) and a locking member (32), wherein the lock slot (31) is arranged on the upper surface of a door body (2), and the locking member (32) is arranged on the top of a cleaning machine body (1) and is used to engage with the lock slot (31) to lock the door body (2), characterized in that: The locking member (32) is arranged on the top of the cleaning machine body (1) so as to be flippable forward and backward, and further comprises a pushing block (331) which can move forward and backward. The pushing block (331) is arranged on the rear side of the locking member (32) and always maintains a tendency to move forward, and is used to limit the position of the locking member (32) in a locked or unlocked state. The rear end of the locking member (32) is formed with a first guide surface (301), and the front end of the pushing block (331) is formed with a second guide surface (302) capable of pressing forward against the first guide surface (301) in a locked door state; a local area of ​​the rear end of the locking member (32) is recessed forward to form a third guide surface (303), and a local area of ​​the front end of the pushing block (331) is protruding forward to form a fourth guide surface (304) capable of frictionally limiting with the third guide surface (303) in an open door state and frictionally sliding with the third guide surface (303) in a closed door process; The maximum distance between the first guide surface (301) and the rotation axis centerline of the locking member (32) is L1, and the maximum distance between the third guide surface (303) and the rotation axis centerline of the locking member (32) is L2, where L1>L2; The front end of the locking member (32) is provided with a locking hook (321) bent downward, and the door lock further comprises: A trigger assembly (34) is arranged beside the locking member (32) and is used to provide the locking member with a force to flip forward during the door closing process so that the lock hook can be hooked into the lock slot; The driving assembly (38) is arranged beside the locking member (32) and is used to provide the locking member (32) with power to flip backwards so as to lift the locking hook (321) upwards when the locking hook (321) is separated from the locking groove (31) during the door opening process.

2. The door lock for a cleaning machine according to claim 1, characterized in that: At least a portion of the first guide surface (301) is a first arc surface (3011) that arches outward, and the outer edge of the cross section of the first arc surface (3011) is located on a circumferential surface with the rotation axis of the locking member (32) as the center of the circle, and the distance from the outer edge of the cross section of the first arc surface (3011) to the rotation axis of the locking member (32) as the center of the circle is L1.

3. The door lock for a cleaning machine according to claim 1, characterized in that: At least a portion of the third guide surface (303) is a second arc surface that arches outward, and the outer edge of the second arc surface section is located on a circumferential surface with the rotation axis of the locking member (32) as the circle center, and the distance from the outer edge of the second arc surface section to the rotation axis of the locking member (32) as the circle center is L2.

4. The door lock for a cleaning machine according to claim 1, characterized in that: The rear end of the locking member (32) is provided with a groove (320) recessed forward, and correspondingly, the front end of the pushing block (331) is provided with a protrusion (3311) extending forward and capable of being inserted into the groove (320), the inner end surface of the groove (320) constitutes the third guide surface (303), and the fourth guide surface (304) is formed on the front end surface of the protrusion (3311).

5. The door lock for a cleaning machine according to claim 4, characterized in that: The fourth guide surface (304) is a first vertical surface extending upward from the lower edge of the protrusion (3311), and at least a portion of the third guide surface (303) is a second arc surface arched outward. In the door opening state, the second arc surface and the first vertical surface are frictionally limited; During the door closing process, the second arc surface and the first vertical surface are frictionally slidably matched, and a gap is provided between the first guide surface (301) and the second guide surface (302); In the door closing state, the second arc surface is separated from the first vertical surface, and the first guide surface (301) and the second guide surface (302) are pressed and matched.

6. The door lock for a cleaning machine according to claim 5, characterized in that: The front end surface of the pushing block (331) is formed with a second vertical surface (3312) and a third arc surface (3313) which are connected in sequence from top to bottom, and the third arc surface (3313) is recessed backward relative to the second vertical surface (3312). During the door closing process, the first guide surface (301) corresponds to the third arc surface (3313); In the door closing state, the lower edge of the first guide surface (301) is pressed and fitted with the second vertical surface (3312).

7. The door lock for a cleaning machine according to claim 6, characterized in that: A switching structure is provided between the third guide surface (303) and the fourth guide surface (304) of the locking member (32), which can switch the position of the force applied by the push block (331) to the locking member (32) from the third guide surface (303) to the first guide surface (301) during the door closing process.

8. The door lock for a cleaning machine according to claim 7, characterized in that: The front end surface of the protrusion (3311) is formed with a clearance area (A) that is gradually recessed upward and backward from the upper edge of the first vertical surface. The clearance area (A) cooperates with the lower edge guide of the second arc surface to form the switching structure.

9. The door lock for a cleaning machine according to claim 8, characterized in that: A guiding inclined surface (305) extending upward and backward from the upper edge of the first vertical surface is formed in the middle of the front end surface of the protrusion (3311), and a plane (306) smoothly connected to the lower edge of the second arc surface is provided at the bottom of the rear end of the locking member (32). In the closed state, When the lower edge of the third guide surface (303) corresponds to the upper edge of the first vertical surface, the lower edge of the first guide surface (301) corresponds to the upper edge of the third arc surface (3313) with a gap therebetween; When the lower edge of the third guide surface (303) is located above the first vertical surface and the plane (306) and the guide inclined surface (305) are initially matched, the lower edge of the first guide surface (301) corresponds to the lower edge of the second vertical surface and the gap between the two gradually decreases; When the lower edge of the first guide surface (301) contacts and presses against the second vertical surface (3312), a matching gap is formed between the plane (306) of the locking member (32) and the guide inclined surface (305).

10. The door lock for a cleaning machine according to claim 6, characterized in that: The cross section of the third arc surface (3313) is two arc segments connected to each other, or the cross section of the third arc surface is an arc segment or a vertical line segment connected up and down.

11. A cleaning machine, comprising a cleaning machine body (1) and a door body (2), wherein the cleaning machine body (1) has a cleaning chamber (11) and a side opening (12) connected to the cleaning chamber (11), and the lower edge of the door body (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 10, wherein the door lock is arranged on the top of the cleaning machine and is used to lock or unlock the top of the cleaning machine body (1) and the top of the door body (2).

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