Door lock structure and cleaning equipment

Abstract

The invention discloses a door lock structure and cleaning equipment, the door lock structure comprises a lock shell, a buffer sleeve and a lock body, the lock shell forms a lock hole with an opening in one side, a locking piece is arranged in the lock hole, the buffer sleeve is nested in the lock hole and extends to the opening of the lock hole, and the inner wall of the buffer sleeve is a guide inclined plane gradually expanding outwards; the lock body comprises a lock body base part and a lock body head part, and the lock body base part forms a first guide surface which is gradually shrunk from the side surface of the lock body base part to the lock body head part; the lock body can extend into the buffer sleeve along a first direction and move to a locking position; at the locking position, the lock body head part can be locked with the locking piece, and the lock body base part is matched with the guide inclined surface; the buffering sleeve can prevent the lock shell and the lock body from being damaged due to direct rigid collision, the guide inclined face and the first guide face can guide the lock body to enter the buffering sleeve, the buffering sleeve can further support the base portion of the lock body, and the problem that a machine door droops is solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of cleaning equipment, and in particular, relates to a door lock structure and also to a cleaning equipment comprising the door lock structure. Background Art

[0002] At present, the clothes opening of drum washing machines is developing towards a larger diameter, and the weight of the doors is also getting heavier. The doors of drum washing machines are all side-opening. Under long-term use and external force, the door hinges and door hinge pin sleeves will be excessively worn, and then the door will sag, resulting in the door hook not being able to be smoothly inserted into the door lock when closing the door, and the door hook and door lock will collide rigidly. At the same time, the door closing feel will be stuck, affecting the product experience.

[0003] like Figure 1 As shown, the current door hook 7 and door lock housing 6 are mated using a clearance and bevel design. When the door hook 7 enters the lock hole on the door lock housing 6, there is a clearance gap of more than 1 mm between the door hook 7 and the lock hole, and a bevel of approximately 3 mm is formed at the lock hole entrance. If the door sags due to its own weight or wear, the assembly clearance between the door hook 7 and the side wall of the lock hole will be insufficient, or even interfere with each other. When the interference is less than the height of the bevel, the door hook 7 can slide into the lock hole along the bevel.

[0004] However, sometimes the door sags too much, and the interference between the door hook 7 and the edge of the lock hole exceeds the height of the chamfer at the entrance of the lock hole. At this time, the door hook 7 will hit the door lock shell 6, and the door cannot be closed, resulting in failure scenarios such as the door hook 7 breaking or the door lock shell 6 being damaged, causing complaints from users. Summary of the Invention

[0005] The present invention aims to solve the problem of door sagging in the prior art and provides a door lock structure and a cleaning device.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions: According to a first aspect of the present invention, there is provided a door lock structure comprising: A lock housing is formed with a lock hole having an opening on one side, wherein a locking member is disposed in the lock hole; a buffer sleeve, which is nested in the lock hole, wherein the outer end of the buffer sleeve extends to the opening of the lock hole, and the inner wall of the buffer sleeve is constructed as a guide slope that gradually expands outward from the inner end to the outer end; The lock body comprises a lock body base and a lock body head arranged along a first direction, wherein one end of the lock body base connected to the lock body head forms a first guide surface that gradually shrinks from a side surface of the lock body base toward the lock body head; The lock body is configured to extend into the buffer sleeve along a first direction and move to a locking position; in the locking position, the lock body head can be locked with the locking member, and the lock body base cooperates with the guide slope.

[0007] In some embodiments of the present invention, a side surface of the lock body base forms a second guide surface that gradually shrinks toward the lock body head, and the second guide surface is parallel to the guide inclined surface.

[0008] In some embodiments of the present invention, the angle between the second guide surface and the first direction is less than or equal to 5°.

[0009] In some embodiments of the present invention, the length of the lock body in the first direction is L, the length of the guide slope in the first direction is L1, and L1 is greater than or equal to 2 / 3L.

[0010] In some embodiments of the present invention, the lock body base is configured as a columnar structure, and the first guide surface and the second guide surface surround the lock body base.

[0011] In some embodiments of the present invention, the outer end of the lock body head is provided with a chamfer.

[0012] In some embodiments of the present invention, a positioning groove is provided on the inner wall of the lock hole, and the inner end of the buffer sleeve is engaged with the positioning groove.

[0013] In some embodiments of the present invention, the outer end of the buffer sleeve is provided with a flange extending radially outward, and the opening of the lock hole is provided with a step groove matching the flange.

[0014] In some embodiments of the present invention, the buffer sleeve is a rubber sleeve.

[0015] According to the second aspect of the present invention, a cleaning device is also provided, comprising a body and a side-opening door, and the above-mentioned door lock structure, wherein one of the lock shell and the lock body of the door lock structure is arranged on the body, and the other is arranged on the side-opening door.

[0016] Compared with the existing technology, the advantages and positive effects of the present invention are as follows: the lock body of the door lock structure can be inserted into the buffer sleeve and locked with the locking member in the lock hole. The buffer sleeve nested in the lock hole can guide the lock body into the buffer sleeve via the guide slope. The buffer sleeve can act as a buffer to prevent the lock shell and lock body from being damaged by direct rigid collision. When the door is lowered, the first guide surface at the base of the lock body can guide the lock body into the buffer sleeve, raising the door position and enabling smooth closing to avoid jamming. When in the locked position, the buffer sleeve can also support the base of the lock body, reducing the deformation of the hinge under stress, thereby improving the sagging problem of side-opening doors.

[0017] Other features and advantages of the present invention will become more apparent after reading the detailed description of the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 is a background technology drawing; Figure 2 is a cross-sectional view of the door lock structure in the locked position according to the first embodiment of the present invention; Figure 3 is a cross-sectional view of the door lock structure in the open position according to the first embodiment of the present invention; Figure 4 Schematic diagram of the door lock structure according to the first embodiment of the present invention with the lock body drooping; Figure 5 Schematic diagram of the lock body head entering the buffer sleeve of the door lock structure of embodiment 1 of the present invention; Figure 6 Schematic diagram of the lock body base of the door lock structure of embodiment 1 of the present invention entering the buffer sleeve; Figure 7 1 is an exploded view of the lock housing and the buffer sleeve of the door lock structure according to the first embodiment of the present invention; Figure 8 Schematic diagram of the door lock structure of the second embodiment of the present invention with the lock housing drooping; Figure 9 Schematic diagram of a cleaning device according to a third embodiment of the present invention.

[0020] In the figure, 1. Lock housing; 11. Lock hole; 111. Positioning groove; 112. Step groove; 12. Locking piece; 2. Buffer sleeve; 21. Guide slope; 22. Flanging; 3. Lock body; 31. Lock body base; 32. Lock body head; 311, first guide surface; 312, second guide surface; 321, through hole; 322, chamfer; 4. Body; 5. Side-opening door; 6. Door lock housing; 7. Door hook. DETAILED DESCRIPTION

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] In the description of the present invention, it should be understood that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be understood as a limitation on the present invention.

[0023] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections. A person of ordinary skill in the art will understand the specific meanings of the above terms in the present invention in specific circumstances. In the description of the embodiments, specific features, structures, materials, or characteristics may be combined in any appropriate manner in any one or more embodiments or examples.

[0024] The terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the quantity of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features.

[0025] In the description of the present invention, unless otherwise specified, "a plurality of" means two or more. Unless otherwise specified, the numerical range herein includes not only the entire range within its two endpoints, but also several subranges contained therein.

[0026] In addition, the present invention may repeat reference numbers and / or reference letters in different examples. This repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but those skilled in the art will recognize the application of other processes and / or the use of other materials. Example 1

[0027] See also Figures 2 to 7The figure shows an embodiment of a door lock structure provided by the present invention. The door lock structure includes a lock housing 1, a buffer sleeve 2, and a lock body 3. The lock housing 1 defines a lock hole 11 with an open end. A locking member 12 is disposed within the lock hole 11. The locking member 12 is used to lock with the lock body 3.

[0028] The buffer sleeve 2 is nested within the lock hole 11, with its outer end extending to the opening of the lock hole 11. The lock body 3 can be inserted into the buffer sleeve 2 within the lock hole 11, and the locking member 12 can lock the lock body 3. The inner wall of the buffer sleeve 2 is constructed as a guide slope 21 that gradually expands from the inner end to the outer end. The inner end of the buffer sleeve 2 faces the inside of the lock hole 11, while the outer end faces the outside of the lock hole 11. The guide slope 21 forms a flared opening, which facilitates the insertion of the lock body 3 from the outer end of the buffer sleeve 2 to the inner end.

[0029] The lock body 3 includes a lock body base 31 and a lock body head 32 arranged along a first direction. A first guide surface 311 is formed at one end of the lock body base 31 connected to the lock body head 32. The first guide surface 311 gradually shrinks from the side of the lock body base 31 to the lock body head 32. The width W2 of the lock body head 32 is smaller than the width W1 of the lock body base 31. There is a fitting gap between the lock body head 32 and the guide slope 21 of the buffer sleeve 2, so that the lock body head 32 can easily enter the buffer sleeve 2. The lock body 3 is constructed to be able to extend into the buffer sleeve 2 along the first direction and move to the locked position. Figure 2 As shown, in the locked position, the lock body head 32 can be locked with the locking member 12 , and the lock body base 31 cooperates with the guide inclined surface 21 of the buffer sleeve 2 .

[0030] The door lock structure provided by the present invention can be applied to cleaning appliances with side-opening doors, such as drum washing machines, clothes dryers, and dishwashers. The door of a cleaning appliance is typically hinged to the side of the appliance body. The door lock structure is positioned between the appliance body and the door, with the lock body head 32 aligned with the middle of the lock hole 11 in a first direction. When the door is closed in the first direction, the lock body 3 is inserted into the lock hole 11. Figure 3 The direction indicated by the middle arrow is a first direction, which is a horizontal direction or an approximately horizontal direction.

[0031] The gravity of the door acts on the hinge for a long time, which can easily lead to fatigue creep of the hinge, the door drooping, and the relative position of the lock hole 11 and the lock body 3 in the height direction offset, causing interference between the lock body 3 and the buffer sleeve 2.

[0032] like Figure 3In one embodiment shown, the lock shell 1 is set on the machine body, and the lock body 3 is set on the machine door. The assembly gap in the height direction between the lock body head 32 and the outer end of the buffer sleeve 2 is G. When the machine door sags, the lock body 3 moves downward. When the machine door sags less than the assembly gap G, when the machine door is closed along the first direction, after the lock body head 32 enters the buffer sleeve 2, the first guide surface 311 can guide the lock body base 31 into the buffer sleeve 2, thereby preventing the machine door from getting stuck when closing. The lock body head 32 has a relatively weak structure, so that the width of the lock body head 32 is smaller than the width of the lock body base 31, forming an assembly gap G, which can prevent the lock body head 32 from being hit during the door closing process. The guide slope 21 of the buffer sleeve 2 can also guide the lock body base 31, so that the machine door closes smoothly. Specifically, during the process of closing the machine door, the side surface of the lock body head 32, the first guide surface 311 and the second guide surface 312 of the lock body base 31 slide along the guide inclined surface in sequence. The first guide surface 311 and the second guide surface 312 can guide the drooping machine door to gradually rise, so that the lock body head 32 moves up to the position corresponding to the locking piece 12.

[0033] If the door sag exceeds the assembly gap G, when the door is closed, the lock body head 32 rubs and collides with the outer end of the buffer sleeve 2. The buffer sleeve 2 can act as a buffer to prevent the lock housing 1 and the lock body 3 from being damaged by direct rigid collision, thereby protecting the lock housing 1 and the lock body 3.

[0034] When the lock body 3 reaches the locked position, the cushion sleeve 2 supports and positions the lock body base 31, ensuring that the lock body head 32 aligns with the locking element 12, allowing for smooth locking and preventing jamming. If the cleaning equipment vibrates during dehydration mode or is bumped during transport, the cushion sleeve 2 cushions the vibration, reducing collisions between the lock body 3 and the locking element 12, and preventing damage or breakage. The cushion sleeve 2 supports the lock body base 31 and also shares the force on the door hinge, reducing deformation and helping to alleviate door sagging.

[0035] Specifically, the lock head 32 can be provided with a through hole 321. When in the locked position, the through hole 321 corresponds to the position of the locking member 12. Under the control of the driving device, the locking member 12 can extend into the through hole 321 to lock the lock head 32. The driving device can then control the locking member 12 to move out of the through hole 321 to unlock the lock. The above-described locking and unlocking methods of the lock head 32 and the locking member 12 are merely examples and are not intended to limit the present invention.

[0036] The buffer sleeve 2 can be made of rubber, silica gel or other materials with certain elasticity. In the present embodiment, the buffer sleeve 2 adopts a rubber sleeve, which has good elasticity, is wear-resistant, has a long service life and is low in production cost.

[0037] Specifically, the inner and outer ends of the buffer sleeve 2 are both open, and the buffer sleeve 2 has a tapered structure that gradually expands from the inner end to the outer end. The lock hole 11 is configured to adapt to the outer wall of the buffer sleeve 2 and can limit the installation position of the buffer sleeve 2. The locking member 12 is located near the inner end of the buffer sleeve 2. The lock housing 1 and lock body 3 can be made of metal, plastic, or other materials depending on the strength requirements. The lock body base 31 and lock body head 32 can be a one-piece metal component to ensure structural strength and resist breakage.

[0038] In some embodiments of the present invention, Figure 2 、 Figure 3 As shown, the side surface of the lock body base 31 forms a second guide surface 312, which gradually tapers toward the end connected to the lock body head 32. The second guide surface 312 is parallel to the guide bevel 21 of the buffer sleeve 2. When the door is closed, there is sufficient clearance between the guide bevel 21 and the second guide surface 312. If the door sags, the second guide surface 312 can also serve as a guide, guiding the lock body base 31 into the buffer sleeve 2. The second guide surface 312 can slide along the guide bevel 21 of the buffer sleeve 2, raising the door position and allowing for smooth closing. When the door is opened, the second guide surface 312, which is inclined in the first direction, can quickly move away from the guide bevel 21 without sliding against it, thereby reducing resistance to door opening. In the locked position, the lock body base 31 fits into the buffer sleeve 2, and the parallel second guide surface 312 and guide bevel 21 mate, distributing pressure, reducing wear, and providing sufficient support for the lock body base 31.

[0039] Specifically, the first guide surface 311 and the second guide surface 312 of the lock body base 31 are connected, and the inclination angle of the first guide surface 311 in the first direction is greater than the inclination angle of the second guide surface 312 in the first direction. The length of the second guide surface 312 in the first direction is not less than the length of the guide slope 21 in the first direction to ensure the effective length of the guide slope 21. In the locked position, the guide slope 21 can fully cooperate with the second guide surface 312. The connection between the first guide surface 311 and the second guide surface 312 can be processed into a rounded corner, and the connection between the first guide surface 311 and the lock body head 32 can also be processed into a rounded corner, which facilitates the lock body base 31 to enter the buffer sleeve 2.

[0040] In addition, the side of the guide bevel 21 extending to the outer end of the buffer sleeve 2 is also processed into a rounded corner. When the position of the lock body head 32 droops to slightly interfere with the outer end of the buffer sleeve 2, the rounded corner of the outer end of the buffer sleeve 2 can guide the lock body head 32 into the buffer sleeve 2.

[0041] In some embodiments of the present invention, Figure 3As shown, the included angle A between the second guide surface 312 and the first direction is less than or equal to 5°. Using a small included angle ensures that the buffer sleeve 2 supports the lock body base 31. The length of the lock body 3 in the first direction is L, which includes the length of the lock body base 31 and the lock body head 32. The length of the guide slope 21 of the buffer sleeve 2 in the first direction is L1, which is greater than or equal to 2 / 3L. This ensures sufficient guiding distance for the lock body 3 to enter the buffer sleeve 2 and ensures that the guide slope 21 can stably support the lock body base 31.

[0042] The angle between the first guide surface 311 and the first direction is greater than 5°. To ensure a better guiding effect, the angle between the first guide surface 311 and the first direction can be set to be greater than 30°, for example, 40°, 45°, 50°, etc.; the length L of the lock body 3, as well as the width W1 of the lock body base 31 and the width W2 of the lock body head 32 are selected by performing strength verification and appropriate values. This application does not impose any restrictions on this.

[0043] Because the lock housing 1 and lock body 3 primarily offset in height, the first guide surface 311 and the second guide surface 312 need to provide guidance in that direction. Therefore, the first guide surface 311 and the second guide surface 312 are provided at least at the top and bottom of the lock body base 31. Alternatively, the first guide surface 311 and the second guide surface 312 can each surround the lock body base 31, providing guidance in all directions.

[0044] In some embodiments of the present invention, the lock body base 31 is configured as a columnar structure and extends along a first direction. The first guide surface 311 and the second guide surface 312 surround the outer side of the lock body base 31 and guide the lock body base 31 in the vertical, horizontal, and vertical directions into the buffer sleeve 2. In one specific embodiment, the first guide surface 311 and the second guide surface 312 can form a conical structure.

[0045] In some embodiments of the present invention, Figure 3 As shown, the outer end of the lock body head 32 is provided with a chamfer 322 , which can prevent the tip of the lock body head 32 from colliding with the buffer sleeve 2 and can guide the lock body head 32 to cooperate with the guide slope 21 of the buffer sleeve 2 .

[0046] In order to prevent the buffer sleeve 2 from falling off from the lock hole 11, the buffer sleeve 2 can be fixed in the lock hole 11 by bonding, snapping, fastening, etc., and the present invention does not impose any limitation on this.

[0047] In some embodiments of the present invention, Figure 7As shown, the inner wall of the lock hole 11 is provided with a positioning groove 111, and the inner end of the buffer sleeve 2 engages with the positioning groove 111. The positioning groove 111 serves to limit the buffer sleeve 2, preventing the buffer sleeve 2 from moving into the lock hole 11 when impacted by the lock body 3. The positioning groove 111 can be an annular groove provided on the inner wall of the lock hole 11. The positioning groove 111 can also be formed by a protrusion on the inner wall of the lock hole 11, which abuts the inner end of the buffer sleeve 2, preventing the buffer sleeve 2 from moving into the lock hole 11.

[0048] In some embodiments of the present invention, Figure 7 As shown, the outer end of the buffer sleeve 2 is provided with a radially outwardly extending flange 22. The opening of the lock hole 11 is provided with a stepped groove 112 that mates with the flange 22. The flange 22 of the buffer sleeve 2 fits into the stepped groove 112, providing a secure mounting position for the buffer sleeve 2. When the door droop exceeds the assembly gap G between the lock head 32 and the buffer sleeve 2, the lock head 32 collides with the flange of the buffer sleeve 2, cushioning the impact and preventing damage to the lock head 32. Example 2

[0049] See also Figure 8 Another embodiment of a door lock structure provided by the present invention is shown. The difference from the first embodiment is that the lock shell 1 of the door lock structure in this embodiment is arranged on the machine door, and the lock body 3 is arranged on the machine body.

[0050] When the door droops, the lock housing 1 shifts downward, and the guide slope 21 on the top of the buffer sleeve 2 can guide the lock body 3 into the buffer sleeve 2. The first guide surface 311 and the second guide surface 312 on the top of the lock body base 31 can guide the lock body 3 along the guide slope 21 on the top of the buffer sleeve 2, thereby lifting the drooping door and closing it smoothly.

[0051] In detail, after the outer end of the lock body head 32 enters the buffer sleeve 2, the guide slope 21 of the buffer sleeve 2 slides along the side surface of the lock body head 32, the first guide surface 311 and the second guide surface 312 in sequence, and the lock shell 1 moves upward under the guidance of the first guide surface 311 and the second guide surface 312, so that the drooping machine door is raised, and the locking piece 12 in the lock hole 11 can move to the position corresponding to the lock body head 32.

[0052] When in the locked position, the lock body base 31 can support the buffer sleeve 2 and the lock shell 1 through the second guide surface 312, thereby reducing the deformation of the door hinge due to stress and improving the problem of door sagging. Example 3

[0053] See also Figure 9The figure shows an embodiment of a cleaning device provided by the present invention. The cleaning device includes a body 4, a side-opening door 5, and the door lock structure provided in the first embodiment. The cleaning device can be a drum washing machine, a clothes dryer, a dishwasher, etc. The body 4 has a working chamber for accommodating items to be cleaned. The side-opening door 5 is typically hingedly mounted on one side of the body 4 and is in an upright position, used to close the working chamber of the body 4.

[0054] The door lock structure includes a lock housing 1, a buffer sleeve 2, and a lock body 3. The lock housing 1 forms a lock hole 11 with an opening on one side. A locking member 12 is disposed within the lock hole 11. The buffer sleeve 2 is nested within the lock hole 11, with the outer end of the buffer sleeve 2 extending to the opening of the lock hole 11. One of the lock housing 1 and the lock body 3 is mounted on the cleaning device's body 4, while the other is mounted on the cleaning device's side-opening door 5.

[0055] When the side-opening door 5 is closed, the lock body 3 can be inserted into the cushion sleeve 2 in the lock hole 11, and the locking member 12 can lock the lock body 3, thereby locking the side-opening door 5. The specific structure, principle, and effect of the lock housing 1, cushion sleeve 2, and lock body 3 in this embodiment can be referred to the door lock structure in the first embodiment, and will not be repeated here.

[0056] In a specific implementation of this embodiment, a metal front plate is provided on one side of the cleaning device, a lock shell 1 is provided on the inner side of the metal front plate, and a lock body 3 is provided on the outer frame of the side-opening door 5. An opening for exposing the lock hole 11 is provided on the metal front plate, or the opening of the metal front plate can constitute the opening of the lock hole 11. When the side-opening door 5 is closed, the door frame cooperates with the metal front plate, the lock body 3 is inserted into the buffer sleeve 2 and locked with the locking member 12 in the lock hole 11. The buffer sleeve 2 acts as a buffer to prevent damage caused by direct collision between the lock shell 1 and the lock body 3. The guide slope 21 of the buffer sleeve 2 can guide the lock body 3 to enter.

[0057] When the side-hinged door 5 begins to sag, the chamfer 322 of the lock body head 32 and the first and second guide surfaces 311 and 312 of the lock body base 31 guide the lock body 3 into the cushion sleeve 2, raising the drooping side-hinged door 5 and allowing it to close smoothly without getting stuck. When locked, the cushion sleeve 2 also supports the lock body base 31, reducing deformation caused by the hinge and thus alleviating the drooping problem of the side-hinged door 5.

[0058] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for a person skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to replace some of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions claimed to be protected by the present invention.

Claims

1. A door lock structure, characterized in that: include: A lock housing is formed with a lock hole having an opening on one side, wherein a locking member is disposed in the lock hole; a buffer sleeve, which is nested in the lock hole, wherein the outer end of the buffer sleeve extends to the opening of the lock hole, and the inner wall of the buffer sleeve is constructed as a guide slope that gradually expands outward from the inner end to the outer end; The lock body comprises a lock body base and a lock body head arranged along a first direction, wherein one end of the lock body base connected to the lock body head forms a first guide surface that gradually shrinks from a side surface of the lock body base toward the lock body head; The lock body is configured to extend into the buffer sleeve along a first direction and move to a locking position; in the locking position, the lock body head can be locked with the locking member, and the lock body base cooperates with the guide slope.

2. The door lock structure according to claim 1, characterized in that: A side surface of the lock body base forms a second guide surface that gradually shrinks toward the lock body head, and the second guide surface is parallel to the guide inclined surface.

3. The door lock structure according to claim 2, characterized in that: An included angle between the second guide surface and the first direction is less than or equal to 5°.

4. The door lock structure according to claim 2, characterized in that: The length of the lock body in the first direction is L, the length of the guide slope in the first direction is L1, and L1 is greater than or equal to 2 / 3L.

5. The door lock structure according to claim 2, characterized in that: The lock body base is configured as a columnar structure, and the first guide surface and the second guide surface surround the lock body base.

6. The door lock structure according to claim 1, characterized in that: The outer end of the lock body head is provided with a chamfer.

7. The door lock structure according to claim 1, characterized in that: The inner wall of the lock hole is provided with a positioning groove, and the inner end of the buffer sleeve is engaged with the positioning groove.

8. The door lock structure according to claim 1, characterized in that: The outer end of the buffer sleeve is provided with a flange extending radially outward, and the opening of the lock hole is provided with a step groove matching the flange.

9. The door lock structure according to any one of claims 1 to 8, characterized in that: The buffer sleeve is a rubber sleeve.

10. A cleaning device, characterized in that: It comprises a machine body and a side-opening door, and a door lock structure according to any one of claims 1 to 9, wherein one of a lock shell and a lock body of the door lock structure is arranged on the machine body, and the other is arranged on the side-opening door.

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