Pool cleaning robot

Abstract

The utility model provides a pool cleaning robot which comprises a robot body, the robot body is provided with a mounting cavity and an opening communicating with the mounting cavity, and a stop part is arranged in the mounting cavity; the filter box is arranged in the mounting cavity in a drawable mode, the opening is used for enabling the filter box to enter and exit from the mounting cavity, the filter box comprises a first box wall, the first box wall has deformability, a limiting protrusion is arranged on the outer surface of the first box wall, and under the condition that the filter box is located in the mounting cavity, the limiting protrusion abuts against the stopping part; the locking piece is movably connected with the filter box, the locking piece has a locking state and an unlocking state, the locking piece abuts against the inner surface of the first box wall when in the locking state, supporting force is formed on the first box wall, so that the limiting protrusion keeps abutting against the stopping part, and the locking piece is separated from the first box wall when in the unlocking state.

Description

Technical Field

[0001] This application relates to the field of robot technology, and particularly to a pool cleaning robot. Background Art

[0002] A pool cleaning robot is a robot that can perform cleaning tasks in a pool. Generally, a filter box is installed inside the body of the pool cleaning robot.

[0003] In some pool cleaning robots in the related art, the filter box is fixedly connected to the body, that is, the filter box is non-removable or difficult to remove relative to the body, which brings inconvenience to the cleaning of the filter box and affects the user experience. Utility Model Content

[0004] This application provides a pool cleaning robot, aiming to improve the convenience of cleaning the filter box so as to improve the user experience.

[0005] The specific technical solution is as follows:

[0006] An embodiment of this application provides a pool cleaning robot, which includes: a body provided with an installation cavity and an opening communicating with the installation cavity, and a stop portion is arranged inside the installation cavity; a filter box disposed in the installation cavity in a slidable manner, and the opening is used for the filter box to enter and exit the installation cavity. The filter box includes a first box wall with deformability, and a limiting protrusion is arranged on the outer surface of the first box wall. When the filter box is located in the installation cavity, the limiting protrusion abuts against the stop portion; and a locking member movably connected to the filter box, the locking member has a locking state and an unlocking state. When the locking member is in the locking state, it abuts against the inner surface of the first box wall and forms a supporting force on the first box wall to keep the limiting protrusion in an abutting relationship with the stop portion, and when the locking member is in the unlocking state, it is separated from the first box wall.

[0007] In the pool cleaning robot in the embodiment of this application, the filter box can be installed in the installation cavity of the body in a slidable manner. By adjusting the state of the locking member, the filter box can be held in the installation cavity or made convenient to take out. Thus, the convenience of cleaning the filter box can be improved, thereby improving the user experience.

[0008] In some embodiments of this application, the limiting protrusion is a hemispherical structure. In this way, during the process of pulling the filter box out of the installation cavity, by using the spherical surface of the limiting protrusion, it is easier to release the abutting relationship between the limiting protrusion and the stop portion, thereby reducing the difficulty of taking out the filter box.

[0009] In some embodiments of the present application, the locking member includes a support arm and a connecting arm. One end of the connecting arm is connected to the support arm, and the other end of the connecting arm is rotatably connected to the filter cartridge. When the locking member is in the locked state, the support arm abuts against the first box wall and forms a supporting force on the first box wall. When the locking member is in the unlocked state, the support arm is separated from the first box wall.

[0010] The locking member includes a support arm and a connecting arm that are connected to each other, and the connecting arm is rotatably connected to the filter cartridge, making the process of adjusting the state of the locking member relatively simple and convenient to operate.

[0011] In some embodiments of the present application, the number of the connecting arms is two. The two connecting arms are located at both ends of the support arm, and the two connecting arms are respectively connected to two opposite box walls of the filter cartridge. When the filter cartridge is installed in the installation cavity, the locking member is located at one end of the filter cartridge close to the opening.

[0012] The locking member has a support arm and two connecting arms, and the two connecting arms are located at both ends of the support arm, making the overall shape of the locking member U-shaped. This enables the locking member to also be used as a handle. When it is necessary to take out the filter cartridge from the installation cavity, the locking member can be first adjusted to the unlocked state, and then the locking member used as a handle can be grasped and the filter cartridge can be pulled outwards. In this way, the process of taking out the filter cartridge can be made easier. Additionally, when the filter cartridge is installed in the installation cavity, the locking member is located at one end of the filter cartridge close to the opening, which places the locking member at the opening position of the installation cavity, making it relatively convenient to adjust the state of the locking member. Moreover, it also makes it easy to grasp the locking member when it is used as a handle.

[0013] In some embodiments of the present application, the support arm has a support surface. When the locking member is in the locked state, the support surface fits with the first box wall.

[0014] The support arm has a support surface, which makes the contact between the support arm and the first box wall a surface contact when the locking member is in the locked state. In this way, the supporting force received by the first box wall can be relatively dispersed, which is beneficial to avoiding the problem that the structure of the first box wall is prone to damage due to overly concentrated force.

[0015] In some embodiments of the present application, along the moving direction of the filter cartridge, the distance from the connection point of the locking member and the filter cartridge to the limiting protrusion is less than or equal to 1 / 5 of the size of the filter cartridge along its own moving direction.

[0016] With such a setting, it is beneficial to ensure that the locking member can provide sufficient supporting effect for the limiting protrusion, so as to ensure that the limiting protrusion can maintain a relatively stable abutting relationship with the stopping portion in the locked state.

[0017] In some embodiments of the present application, the opening is located on one side of the fuselage in the horizontal direction, and the filter cartridge enters and exits the installation cavity in a horizontally moving manner; the first box wall is the lower box wall of the filter cartridge.

[0018] The first box wall is the lower box wall of the filter cartridge, that is to say, the limiting protrusion is located on the outer surface of the lower box wall of the filter cartridge. In this way, when the locking member is in the locked state, it abuts against the lower box wall of the filter cartridge, and will not cause the left-right offset of the center of gravity of the pool cleaning robot, thus facilitating the pool cleaning robot to maintain balance during underwater operation.

[0019] Furthermore, when the locking member is in the locked state, it abuts against the lower box wall of the filter cartridge. Compared with the situation where the locking member abuts against the upper box wall of the filter cartridge, the abutting position of the locking member can be more easily observed by the operator. In this way, the operator can more easily judge whether the locking member abuts against the box wall well.

[0020] In some embodiments of the present application, the filter cartridge includes a first part and a second part. The first part includes a cylindrical main body part and an end wall located at one end of the main body part. The cross-sectional shape of the main body part is rectangular; the second part is a cylindrical structure, the cross-sectional shape of the second part is rectangular, and the second part is detachably connected to the end of the main body part away from the end wall; wherein, the locking member is connected to the second part.

[0021] The filter cartridge includes a first part and a second part. The first part and the second part are detachably connected, and the locking member is connected to the second part among them. With such a setting, when installing the filter element, the first part and the second part can be disassembled first. In this way, the process of installing the filter element will not be hindered by the locking member. After the filter element is installed, the first part and the second part are assembled, and a filter cartridge with the filter element installed can be obtained.

[0022] In some embodiments of the present application, a buckle is provided on one of the second part and the main body part, and a clamping groove is provided on the other of the second part and the main body part, and the buckle is adapted to the clamping groove.

[0023] Thus, through the mutual cooperation of the buckle and the clamping groove, the detachable connection between the second part and the main body part is realized. In addition, the connection method of using the buckle and the clamping groove also makes the assembly and disassembly processes between the second part and the first part easy to operate, and can improve the assembly and disassembly efficiency.

[0024] In some embodiments of the present application, a limiting convex block is provided on one of the second part and the main body part, and a groove is provided on the other of the second part and the main body part, and the limiting convex block is adapted to the groove.

[0025] Through the cooperation of the limiting bump and the groove, the second part and the main body part can be limited. By setting the limiting bump and the groove, the number of snap fasteners and card slots can be reduced. In this way, when disassembling the second part from the first part, it can be relatively labor-saving. Brief Description of the Drawings

[0026] Figure 1 Schematic structural diagram (top view) of the pool cleaning robot provided by an embodiment of the present application;

[0027] Figure 2 is Figure 1 Cross-sectional view taken along the line A-A in

[0028] Figure 3 is Figure 2 Enlarged schematic view of part B in

[0029] Figure 4 Schematic structural diagram of the filter box provided by an embodiment of the present application;

[0030] Figure 5 Schematic structural diagram of the second part of the filter box provided by an embodiment of the present application;

[0031] Figure 6 Schematic structural diagram of the first part of the filter box adopted by an embodiment of the present application.

[0032] The descriptions of the reference numerals in the drawings are as follows:

[0033] 100, fuselage; 101, installation cavity; 1012, stop portion; 102, opening;

[0034] 200, filter box; 201, first box wall; 202, limiting protrusion; 210, first part; 211, main body part; 212, end wall;

[0035] 220, second part; 230, snap fastener; 240, card slot; 250, limiting bump; 260, groove; 300, locking member; 310, support arm; 320, connecting arm. Detailed Description of the Embodiment

[0036] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0037] In the description of the present application, it should be understood that if terms such as "upper", "lower", "left", "right", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, it is only for the convenience of describing the present application 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, the terms describing the positional relationship in the drawings are only for illustrative purposes and cannot be understood as a limitation of this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0038] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as implying or suggesting relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0039] In the description of the present application, unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0040] A pool cleaning robot is a robot that can perform cleaning tasks in a pool. Generally, a filter box is installed inside the body of the pool cleaning robot.

[0041] For some pool cleaning robots in the related art, the filter box is fixedly connected to the body, that is, the filter box is non-detachable or difficult to disassemble relative to the body, which brings inconvenience to the cleaning of the filter box and affects the user experience.

[0042] Based on the above situation, the embodiments of the present application provide a pool cleaning robot, aiming to improve the convenience of cleaning the filter box to improve the user experience.

[0043] Figure 1 It is a schematic structural diagram (top view angle) of the pool cleaning robot provided in an embodiment of the present application. Figure 2 It is Figure 1 the cross-sectional view along the A-A direction in Figure 3 It is Figure 2 the enlarged view of part B in Figure 1 、 Figure 2 andFigure 3 As shown in the figure, the pool cleaning robot provided by the embodiment of the present application includes a body 100, a filter box 200, and a locking member 300. The body 100 is provided with an installation cavity 101 and an opening 102 communicating with the installation cavity 101. A stop portion 1012 is provided inside the installation cavity 101. The filter box 200 is arranged in the installation cavity 101 in a pull-out manner. The opening 102 is used for the filter box 200 to enter and exit the installation cavity 101. The filter box 200 includes a first box wall 201, the first box wall 201 has deformability, and a limit protrusion 202 is provided on the outer surface of the first box wall 201. When the filter box 200 is located in the installation cavity 101, the limit protrusion 202 abuts against the stop portion 1012. The locking member 300 is movably connected to the filter box 200. The locking member 300 has a locking state and an unlocking state. When the locking member 300 is in the locking state, it abuts against the inner surface of the first box wall 201 and forms a supporting force on the first box wall 201, so that the limit protrusion 202 maintains the abutting relationship with the stop portion 1012, thereby keeping the filter box 200 fixed relative to the body 100. When the locking member 300 is in the unlocking state, it is separated from the first box wall 201.

[0044] In the pool cleaning robot of the embodiment of the present application, by providing the installation cavity 101 on the body 100 and arranging the filter box 200 in the installation cavity 101, thus, through the movement of the pool cleaning robot in the pool, the liquid in the pool can continuously enter the filter box 200, and after being filtered by the filter box 200, it flows back into the pool, thereby realizing the cleaning treatment of the pool.

[0045] In addition, an opening 102 communicating with the installation cavity 101 is also provided on the body 100, and the filter box 200 can enter and exit the installation cavity 101 through the opening 102, so as to facilitate the installation and disassembly of the filter box 200. Among them, when installing the filter box 200, the filter box 200 can be first pushed into the installation cavity 101 through the opening 102. After the filter box 200 moves to the preset position, the limit protrusion 202 on the first box wall 201 will abut against the stop portion 1012 in the installation cavity 101. However, since the first box wall 201 has deformability, the abutting relationship between the limit protrusion 202 and the stop portion 1012 is not firm. Therefore, after the filter box 200 moves to the preset position, the locking member 300 on the filter box 200 needs to be adjusted to the locking state, so that the locking member 300 abuts against the inner surface of the first box wall 201 of the filter box 200 and forms a supporting force on the first box wall 201. Under the action of this supporting force, the limit protrusion 202 can maintain the abutting relationship with the stop portion 1012, and further keep the filter box 200 fixed relative to the body 100. In this way, the stable installation of the filter box 200 on the body 100 can be realized.

[0046] ​When the pool cleaning robot finishes the cleaning work and the filter cartridge 200 needs to be cleaned, the locking member 300 can be adjusted to the unlocked state so that the locking member 300 is separated from the first cartridge wall 201, thereby releasing the supporting force on the first cartridge wall 201. At this time, the filter cartridge 200 can be pulled outwards, and the filter cartridge 200 can be pulled out of the installation cavity 101 by an external force. During this process, by utilizing the deformability of the first cartridge wall 201, the limiting protrusion 202 on the first cartridge wall 201 can be disengaged from the abutting relationship with the stopper portion 1012, without affecting the removal process of the filter cartridge 200.

[0047] In summary, for the pool cleaning robot in the embodiment of the present application, the filter cartridge 200 therein can be installed in the installation cavity 101 of the fuselage 100 in a pull-out manner. By adjusting the state of the locking member 300, the filter cartridge 200 can be held in the installation cavity 101 or the filter cartridge 200 can be made convenient to take out. Thus, the convenience of cleaning the filter cartridge can be improved, thereby enhancing the user experience.

[0048] As Figure 3 shown, in some embodiments, the limiting protrusion 202 is a hemispherical structure. In this way, during the process of pulling the filter cartridge 200 out of the installation cavity 101, by utilizing the spherical surface of the limiting protrusion 202, it is easier to disengage the limiting protrusion 202 from the abutting relationship with the stopper portion 1012, thereby reducing the difficulty of removing the filter cartridge 200.

[0049] Figure 4 is a schematic structural view of a filter cartridge provided in an embodiment of the present application. As Figure 4 shown, in some embodiments, the locking member 300 includes a support arm 310 and a connecting arm 320. One end of the connecting arm 320 is connected to the support arm 310, and the other end of the connecting arm 320 is rotatably connected to the filter cartridge 200. When the locking member 300 is in the locked state, the support arm 310 abuts against the first cartridge wall 201 and forms a supporting force on the first cartridge wall 201. When the locking member 300 is in the unlocked state, the support arm 310 is separated from the first cartridge wall 201.

[0050] The process of adjusting the state of the locking member 300 is as follows: rotate the connecting arm 320 relative to the filter cartridge 200 so that the support arm 310 moves to abut against the first cartridge wall 201. At this time, the locking member 300 is adjusted to the locked state. When unlocking is required, rotate the connecting arm 320 relative to the filter cartridge 200 so that the support arm 310 is separated from the first cartridge wall 201. At this time, the locking member 300 is adjusted to the unlocked state. It can be seen that the locking member 300 includes a support arm 310 and a connecting arm 320 that are connected to each other, and the connecting arm 320 is rotatably connected to the filter cartridge 200, making the process of adjusting the state of the locking member 300 relatively simple and convenient to operate.

[0051] Further, the number of the connecting arms 320 is two. The two connecting arms 320 are located at two ends of the supporting arm 310. The two connecting arms 320 are respectively connected to two opposite box walls of the filter cartridge 200. When the filter cartridge 200 is installed in the installation cavity 101, the locking member 300 is located at one end of the filter cartridge 200 close to the opening 102.

[0052] The locking member 300 has a supporting arm 310 and two connecting arms 320, and the two connecting arms 320 are located at two ends of the supporting arm 310, so that the locking member 300 is integrally U-shaped, which enables the locking member 300 to also be used as a handle. When it is necessary to take out the filter cartridge 200 from the installation cavity 101, the locking member 300 can be adjusted to the unlocked state first, and then the locking member 300 used as a handle can be grasped and the filter cartridge 200 can be pulled outwards. In this way, the process of taking out the filter cartridge 200 can be made easier.

[0053] In addition, when the filter cartridge 200 is installed in the installation cavity 101, the locking member 300 is located at one end of the filter cartridge 200 close to the opening 102, which enables the locking member 300 to be at the position of the opening 102 of the installation cavity 101, and the state of the locking member 300 can be adjusted more conveniently. In addition, it also makes the locking member 300 easy to be grasped when used as a handle.

[0054] In one of the embodiments, the supporting arm 310 has a supporting surface. When the locking member 300 is in the locked state, the supporting surface is attached to the first box wall 201. The supporting arm 310 has a supporting surface, which enables the supporting arm 310 and the first box wall 201 to be in surface contact when the locking member 300 is in the locked state. In this way, the supporting force received by the first box wall 201 can be more dispersed, which is beneficial to avoiding the problem that the structure of the first box wall 201 is easily damaged due to too concentrated force.

[0055] In some embodiments, along the moving direction of the filter cartridge 200, the distance from the connection point of the locking member 300 and the filter cartridge 200 to the limiting protrusion 202 is less than or equal to 1 / 5 of the size of the filter cartridge 200 along its own moving direction.

[0056] If the installation position of the locking member 300 is too far from the position where the limiting protrusion 202 is located, the supporting effect that the limiting protrusion 202 can obtain will be relatively small, which will cause it difficult for the limiting protrusion 202 to maintain the abutting relationship with the stopper portion 1012. Therefore, the distance between the installation position of the locking member 300 and the position where the limiting protrusion 202 is located should not be too large. In this embodiment, along the moving direction of the filter cartridge 200, the distance from the connection point of the locking member 300 and the filter cartridge 200 to the limiting protrusion 202 is less than or equal to 1 / 5 of the size of the filter cartridge 200 along its own moving direction. Such a setting is beneficial to ensuring that the locking member 300 can provide sufficient supporting effect for the limiting protrusion 202, so as to ensure that the limiting protrusion 202 can maintain a relatively stable abutting relationship with the stopper portion 1012 in the locked state.

[0057] In some embodiments, the opening 102 is located on one side of the body 100 along the horizontal direction, and the filter cartridge 200 enters and exits the installation cavity 101 in a horizontally moving manner. The first box wall 201 is the lower box wall of the filter cartridge 200.

[0058] The opening 102 is located on one side of the body 100 along the horizontal direction, so that the filter cartridge 200 can enter and exit the installation cavity 101 in a horizontally moving manner.

[0059] In addition, if the limiting protrusion 202 is arranged on the side wall (such as the left side wall or the right side wall) of the filter cartridge 200, when the locking member 300 is in the locked state, the locking member 300 will abut against the left box wall or the right box wall of the filter cartridge 200. In this way, it is easy to cause the left-right offset of the center of gravity of the pool cleaning robot, which is not conducive to the balance of the pool cleaning robot during operation in the water. In this embodiment, the first box wall 201 is the lower box wall of the filter cartridge 200, that is to say, the limiting protrusion 202 is located on the outer surface of the lower box wall of the filter cartridge 200. In this way, when the locking member 300 is in the locked state, it abuts against the lower box wall of the filter cartridge 200, which will not cause the left-right offset of the center of gravity of the pool cleaning robot, thus being beneficial to keeping the pool cleaning robot balanced during operation in the water.

[0060] Furthermore, when the locking member 300 is in the locked state and abuts against the lower box wall of the filter cartridge 200, compared with the situation where the locking member 300 abuts against the upper box wall of the filter cartridge 200, the abutting position of the locking member 300 can be more easily observed by the operator. In this way, the operator can more easily judge whether the locking member 300 abuts against the box wall well.

[0061] Figure 5 It is a schematic structural diagram of the second part of the filter cartridge provided in an embodiment of the present application. Figure 6 It is a schematic structural diagram of the first part of the filter cartridge adopted in an embodiment of the present application. As Figure 4 、Figure 5 and Figure 6 As shown in Figure 6 , in some embodiments, the filter cartridge 200 includes a first part 210 and a second part 220. The first part 210 includes a cylindrical main body 211 and an end wall 212 located at one end of the main body 211. The cross-sectional shape of the main body 211 is rectangular. The second part 220 is a cylindrical structure, and the cross-sectional shape of the second part 220 is rectangular. The second part 220 is detachably connected to the end of the main body 211 away from the end wall 212. Among them, the locking member 300 is connected to the second part 220.

[0062] Generally, a filter element, such as a filter screen, a filter layer, a filter element, etc., will be installed inside the filter cartridge 200. Since the locking member 300 is connected to the inner wall of the filter cartridge 200, the locking member 300 will hinder the process of installing the filter element into the filter cartridge 200. In this embodiment, the filter cartridge 200 includes a first part 210 and a second part 220, and the first part 210 and the second part 220 are detachably connected, and the locking member 300 is connected to the second part 220 among them. With this setting, when installing the filter element, the first part 210 and the second part 220 can be disassembled first, so that the process of installing the filter element will not be hindered by the locking member 300. After the filter element is installed, the first part 210 and the second part 220 are assembled, and the filter cartridge 200 with the filter element installed can be obtained.

[0063] It can be understood that the first part 210 is the main part of the filter cartridge 200 for accommodating. Hollow areas can be provided on multiple walls of the first part 210. The hollow areas can be used for water inlet and outlet, and a filter screen can also be installed in the hollow areas to perform the first filtration process on the water entering the filter cartridge 200.

[0064] Such as Figure 4 , Figure 5 and Figure 6 As shown in Figure 4 , Figure 5 , and Figure 6 , in one of the embodiments, a buckle 230 is provided on one of the second part 220 and the main body 211, and a clamping groove 240 is provided on the other of the second part 220 and the main body 211. The buckle 230 is adapted to the clamping groove 240. Thus, through the mutual cooperation of the buckle 230 and the clamping groove 240, the detachable connection between the second part 220 and the main body 211 is realized. In addition, the connection method using the cooperation of the buckle 230 and the clamping groove 240 also makes the assembly and disassembly processes between the second part 220 and the first part 210 easy to operate, and can improve the assembly and disassembly efficiency.

[0065] Further, a limiting bump 250 is provided on one of the second part 220 and the main body part 211, and a groove 260 is provided on the other of the second part 220 and the main body part 211, and the limiting bump 250 is adapted to the groove 260. Through the cooperation of the limiting bump 250 and the groove 260, the position between the second part 220 and the main body part 211 can be limited. By providing the limiting bump 250 and the groove 260, the number of the snap fasteners 230 and the card slots 240 can be reduced. In this way, when disassembling the second part 220 from the first part 210, it can also be relatively labor-saving.

[0066] The above content is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed in the present application can easily think of changes or substitutions, which should all be covered within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A pool cleaning robot, characterized in that: include: A fuselage, wherein the fuselage is provided with a mounting cavity and an opening communicating with the mounting cavity, and a stopper is provided inside the mounting cavity; A filter box, wherein the filter box is arranged in the installation cavity in a pullable manner, the opening is used to allow the filter box to enter and exit the installation cavity, the filter box comprises a first box wall, the first box wall is deformable, and a limiting protrusion is arranged on the outer surface of the first box wall, and when the filter box is located in the installation cavity, the limiting protrusion abuts against the stopper; as well as A locking piece, wherein the locking piece is movably connected to the filter box, and the locking piece has a locked state and an unlocked state. When the locking piece is in the locked state, it abuts against the inner surface of the first box wall and forms a supporting force on the first box wall so that the limiting protrusion maintains an abutting relationship with the stop portion. When the locking piece is in the unlocked state, it is separated from the first box wall.

2. The pool cleaning robot according to claim 1, characterized in that: The limiting protrusion is a hemispherical structure.

3. The pool cleaning robot according to claim 1, characterized in that: The locking element comprises a supporting arm and a connecting arm, one end of the connecting arm is connected to the supporting arm, and the other end of the connecting arm is rotatably connected to the filter box; When the locking element is in the locked state, the support arm abuts against the first box wall and forms a supporting force on the first box wall. When the locking element is in the unlocked state, the support arm is separated from the first box wall.

4. The pool cleaning robot according to claim 3, characterized in that: The number of the connecting arms is two, the two connecting arms are located at two ends of the supporting arm, and the two connecting arms are respectively connected to two opposite box walls of the filter box; When the filter box is installed in the installation cavity, the locking element is located at one end of the filter box close to the opening.

5. The pool cleaning robot according to claim 3, characterized in that: The support arm has a support surface, and when the locking element is in the locking state, the support surface is in contact with the first box wall.

6. The pool cleaning robot according to claim 1, characterized in that: Along the moving direction of the filter box, the distance from the connection point between the locking piece and the filter box and the limiting protrusion is less than or equal to 1 / 5 of the size of the filter box along its own moving direction.

7. The pool cleaning robot according to claim 1, characterized in that: The opening is located on one side of the body along the horizontal direction, and the filter box moves in and out of the installation cavity in a horizontally movable manner; The first box wall is the lower box wall of the filter box.

8. The pool cleaning robot according to claim 1, characterized in that: The filter box comprises a first part and a second part, the first part comprises a cylindrical main body and an end wall located at one end of the main body, and the cross-section of the main body is rectangular; The second part is a cylindrical structure, the cross-section of the second part is a rectangular shape, and the second part is detachably connected to an end of the main body away from the end wall; Wherein, the locking element is connected to the second part.

9. The pool cleaning robot according to claim 8, characterized in that: A buckle is provided on one of the second part and the main body, and a slot is provided on the other of the second part and the main body, and the buckle is matched with the slot.

10. The pool cleaning robot according to claim 9, characterized in that: A limiting protrusion is arranged on one of the second part and the main body, and a groove is arranged on the other of the second part and the main body, and the limiting protrusion is matched with the groove.

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