Anti-backflow cleaning device of mop bucket

Abstract

The anti-backflow cleaning device of the mop bucket is arranged on the upper portion of an inner cavity of the mop bucket and comprises a bucket body, a cleaning area used for containing a rotating mop to be cleaned is arranged in the bucket body, the bucket body is provided with a top face, the cleaning area is provided with an upward opening located in the top face of the bucket body, the rotating mop can be placed in the opening, and a water inlet pipeline is arranged on the top face. The water inlet pipeline is provided with a water injection opening, the opening, facing the cleaning area, of the water injection opening is used for supplying water to the cleaning area, the water inlet pipeline and the water injection opening are arranged at the top of the bucket body and are higher than the opening in the upper end of the cleaning area, and sewage thrown out when the rotary mop rotates can be effectively prevented from entering the water inlet pipeline from the water injection opening. Sewage is prevented from flowing back to the clean water area of the mop bucket from the water inlet pipeline to pollute clean water in the clean water area.

Description

Technical Field

[0001] The utility model relates to a mop bucket, in particular to a backflow prevention cleaning device for the mop bucket. Background Art

[0002] The rotary mop is a cleaning tool that is widely used in people's daily life. The rotary mop is generally used in conjunction with a mop bucket for cleaning. The mop bucket is filled with water and is cleaned by rotating in clean water. A water-spinning basket is provided on the mop bucket, which is used for centrifugal drying by spinning the water basket. In daily use, the water in the mop bucket will be polluted and become very dirty after one cleaning, thereby affecting the subsequent cleaning effect. In this way, the user needs to frequently change the water in the mop bucket, which makes it more difficult to clean the mop and produces more waste water, and the effect of separating sewage and clean water cannot be achieved.

[0003] In order to solve the above problems, there are mop buckets with independent cleaning chambers and clean water chambers on the market, so that the clean water will not be completely contaminated when the rotary mop is cleaned. For example, patent CN218045025U discloses a cleaning and dirt separation mop bucket, which includes a lower barrel body and an upper barrel body movably arranged on the lower barrel body, the lower barrel body includes a clean water tank and a dirty water tank, a water pump mechanism is arranged in the clean water tank, the bottom of the upper barrel body is provided with a rotating mechanism protruding upward for supporting the rotary mop, the rotating mechanism rotates to drive the water pump mechanism to move and supply water, the water pump mechanism includes a water guide pipe, a water inlet and a water inlet valve are provided on the side wall of the cleaning chamber near the upper end opening, the upper end opening of the water guide pipe is opposite to the water inlet, the water inlet valve controls the opening and closing of the water inlet, and the water inlet valve extends out of the top of the upper barrel body for rotation and control by the user, and the separated clean water tank and the dirty water tank, as well as the water pump mechanism for conveying clean water, can ensure that the mop is cleaned with clean water every time, avoiding poor cleaning effect and secondary pollution caused by repeated use of dirty water to clean the mop.

[0004] In the above patent, the water inlet is arranged on the side wall of the cleaning chamber near the upper opening. When cleaning the mop, the rotating mop rotates in the cleaning chamber. Since the water inlet is lower than the upper opening of the cleaning chamber, the water inlet is closer to the rotating mop in the cleaning chamber. The sewage thrown out by the rotating mop can easily flow back into the clean water chamber from the water inlet, causing the clean water in the clean water chamber to be polluted. Utility Model Content

[0005] Since the water inlet is arranged on the side wall of the cleaning bin near the upper opening, when cleaning the mop, the rotary mop rotates in the cleaning bin, and the sewage thrown out by the rotation of the mop easily flows back into the clean water bin from the water inlet, causing the clean water in the clean water bin to be polluted. The utility model provides a backflow prevention cleaning device for a mop bucket.

[0006] The technical solution adopted by the utility model to solve the above technical problems is: an anti-backflow cleaning device for a mop bucket is installed at the upper part of the inner cavity of the mop bucket, comprising a barrel body, a cleaning area for accommodating a rotating mop for cleaning is provided in the barrel body, the barrel body has a top surface, the cleaning area has an opening located on the top surface of the barrel body and facing upward for the rotating mop to be placed in, a water inlet pipe is provided on the top surface, a water injection port is provided on the water inlet pipe, and the water injection port is opened toward the cleaning area for supplying water to the cleaning area.

[0007] A further preferred technical solution of the utility model is: the barrel body includes a barrel body with a cavity therein and a barrel bottom, the barrel bottom covers the opening at the bottom of the barrel body to form a cleaning area opening upward, the upper top of the barrel body is provided with a transverse extension portion extending laterally, and the water inlet pipe is arranged on the top surface of the transverse extension portion.

[0008] A further preferred technical solution of the utility model is: the lateral extension portion is provided with a water retaining edge surrounding the opening of the cleaning area and extending upward, the water inlet pipe is located outside the water retaining edge, and the water retaining edge is provided with a through hole for docking with the water injection port or for the water inlet pipe to pass through.

[0009] A further preferred technical solution of the utility model is that the inner wall surface of the water retaining edge and the inner wall surface of the barrel body have a smooth transition.

[0010] A further preferred technical solution of the utility model is: a pressure cover is connected to the lateral extension part, and the pressure cover has an inner cavity opening downward. When the pressure cover is closed on the top surface of the lateral extension part, it is combined with the lateral extension part to form the water inlet pipe. The lateral extension part is provided with a through hole running through the upper and lower sides, and the through hole is covered by the pressure cover at the bottom opposite to the opening at the bottom of the pressure cover. The pressure cover has a lateral opening, and one end of the pressure cover with the lateral opening is inserted into the through-opening. The lateral opening and the bottom edge of the through-opening are combined to form the water injection port. The bottom edge of the through-opening is an arc edge connecting the opening edge of the cleaning area and the top surface of the lateral extension part. The pressure cover is provided with an extending sealing plate, and the sealing plate seals the gap between the through-opening and the pressure cover.

[0011] A further preferred technical solution of the utility model is: an inserting portion extending downward is provided on the lateral extension portion, and the inserting portion is used for plugging with the mop bucket.

[0012] A further preferred technical solution of the utility model is: a water retaining cover plate is connected to the upper end of the barrel body, and a socket is provided on the water retaining cover plate above the cleaning area for the rotary mop to pass through, and the socket is smaller than the opening of the cleaning area to form a circle of water retaining portion above the opening of the cleaning area, and the upper edge of the water retaining edge abuts against the lower surface of the water retaining cover plate.

[0013] A further preferred technical solution of the utility model is: the inner side of the water retaining portion has a downwardly rolled edge portion, the rolled edge portion is opposite to the water injection port and blocks at least part of the water injection port, and there is a distance between the rolled edge portion and the water injection port for water to flow into the cleaning area.

[0014] A further preferred technical solution of the utility model is: a circle of convex edges extending upwards is provided on the top surface of the transverse extension portion, the convex edges surround the outer side of the water retaining edge, a circle of vertical side walls extending downwards is provided on the water retaining cover plate, downwardly extending undercuts are provided on the vertical side walls, a buckle groove corresponding to the undercut is provided on the top surface of the transverse extension portion, when the water retaining cover plate is closed on the top of the barrel body, the vertical side wall abuts against the top surface of the transverse extension portion and forms a socket connection with the convex edges, and the undercut is buckled and connected with the buckle groove.

[0015] A further preferred technical solution of the utility model is that a supporting part for supporting the rotary mop to rotate in the cleaning area is provided at the bottom of the cleaning area.

[0016] Compared with the prior art, the utility model has the advantage that the water inlet pipe is arranged on the top surface of the barrel body, and water is supplied to the cleaning area through the water injection port facing the upper opening of the cleaning area. The water inlet pipe and the water injection port are arranged on the top of the barrel body and are higher than the upper opening of the cleaning area. The sewage thrown out when the rotary mop rotates can be effectively reduced from entering the water inlet pipe from the water injection port, and the sewage can be prevented from flowing back from the water inlet pipe to the clean water area of ​​the mop bucket to pollute the clean water in the clean water area. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be described in further detail below in conjunction with the accompanying drawings and preferred embodiments, but those skilled in the art will appreciate that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be used as a limitation on the scope of the present invention. In addition, unless otherwise specified, the drawings are only schematically representing the composition or structure of the described object and may contain exaggerated displays, and the drawings are not necessarily drawn to scale.

[0018] Figure 1 It is a schematic diagram of the overall structure of the mop bucket;

[0019] Figure 2 The figure is a disassembled diagram of the second barrel body and the first barrel body;

[0020] Figure 3 The overall cutaway diagram of the mop bucket Figure 1 ;

[0021] Figure 4 The overall cutaway diagram of the mop bucket Figure 2 ;

[0022] Figure 5 for Figure 4A local enlarged view of point A;

[0023] Figure 6 It is a schematic diagram of the overall structure of the anti-backflow cleaning device;

[0024] Figure 7 It is a cutaway schematic diagram of a backflow prevention cleaning device;

[0025] Figure 8 This is a disassembled diagram of the water retaining cover plate and the second barrel;

[0026] Fig. 9 is a schematic diagram of the overall structure of the second barrel;

[0027] Fig.10 This is a disassembled diagram of the gland and the second barrel.

[0028] In the figure: 1. first barrel body; 2. cleaning area; 3. support part; 4. handle; 5. water retaining cover plate; 6. socket; 7. water pump mechanism; 8. clean water area; 9. inner frame; 10. groove; 11. second barrel body; 12. sewage area; 13. sewage outlet; 14. water guide; 15. barrel bottom; 16. barrel body; 17. water inlet pipe; 18. through hole; 19. horizontal extension part; 20. water filling port; 21. through hole; 22. insertion part; 23. vertical side wall; 24. convex edge; 25. water retaining edge; 26. opening of cleaning area; 27. curling part; 28. water retaining part; 29. ​​arc edge; 30. undercut; 31. snap groove; 32. pressure cover; 33. sealing plate; 34. snap part; 35. snap groove; 36. support seat; 37. inner cleaning part; 38. outer cleaning part. DETAILED DESCRIPTION

[0029] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It will be appreciated by those skilled in the art that these descriptions are merely illustrative and exemplary and should not be construed as limiting the scope of protection of the present invention.

[0030] It should be noted that like reference numerals denote similar items in the following drawings, and thus, once an item is defined in one drawing, it may not be further defined or explained in subsequent drawings.

[0031] Figure 1-Figure 10 As shown, the mop bucket comprises a first barrel body 1 having an inner cavity, the first barrel body 1 is divided into a clean water area 8 and a sewage area 12, an anti-backflow cleaning device is installed at the upper part of the inner cavity of the first barrel body 1, the anti-backflow cleaning device is located above the clean water area 8, and a water pump mechanism 7 is arranged in the clean water area 8. The structures of the water pump mechanism 7 and the first barrel body 1 are both existing structures in the art, and will not be elaborated in detail in this embodiment.

[0032] Figure 4 , Figure 8-Figure 10As shown, the backflow prevention cleaning device includes a second barrel body 11, and a cleaning area 2 for accommodating a rotary mop for cleaning is provided in the second barrel body 11. The second barrel body 11 has a top surface, and the cleaning area 2 has an opening located on the top surface of the second barrel body 11 and facing upward for the rotary mop to be placed in. A water inlet pipe 17 is provided on the top surface, and a water injection port 20 is provided on the water inlet pipe 17. The water injection port 20 faces an opening 26 in the cleaning area. The water inlet pipe 17 is connected to the water pump mechanism 7. When the water pump mechanism 7 is started, the water pump mechanism 7 transports the clean water in the clean water area 8 to the water inlet pipe 17, and then supplies water to the cleaning area 2 through the water injection port 20 on the water inlet pipe 17. The rotary mop is placed in the cleaning area 2 for rotation and cleaning.

[0033] A support portion 3 for supporting the rotary mop to rotate in the cleaning area 2 is provided at the bottom of the cleaning area 2 , and the rotary mop is supported on the support portion 3 to rotate.

[0034] The water pump mechanism 7 can be driven to supply water by the rotation of the support part 3, and the support part 3 is driven to rotate by the rotary mop; or the water pump mechanism 7 can be driven to supply water by a foot pedal provided on the first barrel 1; or the water pump mechanism 7 can also be driven to supply water by electric control. The driving method of the water pump mechanism 7 is the existing method in the art.

[0035] The water inlet pipe 17 and the water injection port 20 are arranged at the top of the second barrel body 11, so that the water inlet pipe 17 and the water injection port 20 are higher than the opening 26 of the cleaning area, which can effectively reduce the sewage thrown out when the rotary mop rotates and enter the water inlet pipe 17 from the water injection port 20, and prevent the sewage from flowing back from the water inlet pipe 17 to the clean water area 8 of the mop bucket to pollute the clean water in the clean water area 8.

[0036] Fig. 9 As shown, preferably, the second barrel body 11 includes a barrel body 16 with a cavity therein and a barrel bottom 15, the barrel bottom 15 covers the opening at the bottom of the barrel body 16 to form a cleaning area 2 with an opening facing upward, and the top of the upper end of the barrel body 16 is provided with a lateral extension portion 19 extending laterally therefrom, and a water inlet pipe 17 is arranged on the top surface of the lateral extension portion 19.

[0037] Figure 4 , Figure 5 As shown, the lateral extension portion 19 is provided with an insertion portion 22 extending downward, and the insertion portion 22 is used to be plugged into the mop bucket. Specifically, an inner frame 9 is installed at the upper opening of the first barrel body 1, and a circle or a combination of grooves 10 are provided on the inner frame 9. The insertion portion 22 on the lateral extension portion 19 is inserted into the groove 10, so that the second barrel body 11 is installed at the upper part of the inner cavity of the first barrel body 1, and the second barrel body 11 can be lifted upward.

[0038] Figure 6 As shown, preferably, a handle 4 is rotatably connected to the second barrel body 11 , and the second barrel body 11 is lifted out of the first barrel body 1 by the handle 4 .

[0039] The handle 4 can be rotated to a standing state for hand-carrying, or rotated to one side to a flipped storage state. A buckle portion 34 is provided on the lower edge of the handle, and a buckle groove 35 corresponding to the buckle portion 34 is provided on the inner frame 9. When the second barrel body 11 is placed downwardly above the clear water area 8, the insertion portion 22 is inserted into the groove 10, and the buckle portion 34 is buckled with the buckle groove 35, so that the second barrel body 11 is more firmly connected to the first barrel body 1.

[0040] Preferably, the lateral extension portion 19 is provided with a water retaining edge 25 surrounding the opening 26 of the cleaning area and extending upward, the water inlet pipe 17 is located outside the water retaining edge 25, and the water retaining edge 25 is provided with a through hole 21 to connect with the water injection port 20 or for the water inlet pipe 17 to pass through.

[0041] Preferably, the inner wall surface of the water retaining edge 25 transitions smoothly with the inner wall surface of the barrel body 16, that is, the water retaining edge 25 is connected to the upper edge of the barrel body 16, so as to increase the height of the cleaning area 2 in disguised form, and the opening 26 of the cleaning area is between the water retaining edge 25 and the barrel body 16.

[0042] Figure 4 , Fig. 9 , Fig.10 As shown, preferably, a pressure cover 32 is connected to the lateral extension portion 19, and the pressure cover 32 has an inner cavity opening downward. When the pressure cover 32 is covered on the top surface of the lateral extension portion 19, it is combined with the lateral extension portion 19 to form a water inlet pipe 17. The lateral extension portion 19 is provided with a through hole 18 running through the upper and lower sides, and the through hole 18 is covered by the pressure cover 32 at the bottom opposite to the opening at the bottom of the pressure cover 32. The pressure cover 32 has a lateral opening, and one end of the pressure cover 32 with the lateral opening is inserted into the through-opening 21, and the lateral opening is combined with the bottom edge of the through-opening 21 to form a water injection port 20. The bottom edge of the through-opening 21 is an arc edge 29, and the arc edge 29 connects the opening edge of the cleaning area 2 and the top surface of the lateral extension portion 19. The pressure cover 32 is provided with an extending sealing plate 33, and the sealing plate 33 blocks the gap between the through-opening 21 and the pressure cover 32.

[0043] The blocking of the blocking plate 33 and the water retaining edge 25 can prevent a small amount of sewage splashed during cleaning from falling onto the top surface of the lateral extension portion 19, and the bottom edge of the through-hole 21 is an arc edge 29, so that even if a small amount of splashed sewage enters the water injection port 20, it will be guided by the arc edge 29 to flow back into the cleaning area 2, thereby achieving a better backflow prevention effect.

[0044] The pressure cover 32 is fixedly connected to the top surface of the transverse extension portion 19 by means of screws.

[0045] The above-mentioned through hole 18 is used to connect with the water pump mechanism 7 located in the clean water chamber below, so that the water pump mechanism 7 is connected with the water inlet pipe 17. When the water pump mechanism 7 is working, the clean water pumped up can enter the water inlet channel from the through hole 18, and then flow into the opening of the clean water area 8 from the water injection port 20.

[0046] Figure 6-Figure 8 As shown, the upper end of the second barrel body 11 is connected to a water retaining cover plate 5, and the water retaining cover plate 5 is provided with a socket 6 located above the cleaning area 2 for the rotary mop to pass through, and the socket 6 is smaller than the opening 26 of the cleaning area to form a circle of water retaining portion 28 above the opening 26 of the cleaning area, and the upper edge of the water retaining edge 25 abuts against the lower surface of the water retaining cover plate 5.

[0047] The water retaining portion 28 is used to prevent the sewage thrown out during cleaning from splashing out of the cleaning area 2. The upper edge of the water retaining edge 25 abuts against the lower surface of the water retaining cover plate 5, which can prevent the thrown sewage from falling from above the water retaining edge 25 to the top surface of the horizontal extension portion 19. The water retaining edge 25 can also support the water retaining cover plate 5. Compared with the existing mop bucket, the water inlet valve structure at the water inlet position is cancelled, which can prevent a small amount of sewage thrown out of the upper end opening of the cleaning area 2 from entering the clean water area 2 through the gap of the water inlet valve structure arranged on the water retaining cover plate 5.

[0048] Figure 7 , Figure 8 As shown, a circle of convex edges 24 extending upward is provided on the top surface of the transverse extension portion 19, and the convex edges 24 surround the outer side of the water retaining edge 25. A circle of vertical side walls 23 extending downward is provided on the water retaining cover plate 5, and an undercut 30 extending downward is provided on the vertical side wall 23. A snap groove 31 corresponding to the undercut 30 is provided on the top surface of the transverse extension portion 19. When the water retaining cover plate 5 is covered on the top of the second barrel body 11, the vertical side wall 23 abuts against the top surface of the transverse extension portion 19, and the vertical side wall 23 forms a socket connection with the convex edges 24, and at the same time, the undercut 30 is snap-connected with the snap groove 31, so that the water retaining cover plate 5 is installed on the second barrel body 11.

[0049] The vertical side wall 23 and the convex edge 24 form a sleeve connection to position the water retaining cover plate 5 .

[0050] Preferably, the inner side of the water retaining portion 28 has a downwardly rolled edge portion 27, which is opposite to the water injection port 20 and blocks at least a portion of the water injection port 20. There is a distance between the rolled edge portion 27 and the water injection port 20 for water to flow into the cleaning area 2. The rolled edge portion 27 can provide a certain shielding effect on splashed sewage and reduce a certain amount of sewage entering the water injection port 20. At the same time, when the water injection port 20 supplies water into the cleaning area 2, the rolled edge portion 27 can provide a certain shielding effect on the water sprayed from the water injection port 20, so that the sprayed water can fall into the cleaning area 2.

[0051] A sewage outlet 13 is provided at the bottom of the second barrel body 11 , and a water guide 14 is provided below the sewage outlet 13 on the first barrel body 1 . The water guide 14 guides sewage flowing from the sewage outlet 13 into the sewage area 12 .

[0052] A support seat 36 is provided on the inner bottom of the second barrel 11, and the support part 3 is arranged on the support seat 36. A plurality of inner cleaning parts 37 are evenly arranged on the outer circumference of the support seat 36. A plurality of outer cleaning parts 38 are evenly arranged on the inner side wall of the second barrel 11. The inner cleaning parts 37 are used to help scrape off dirt on the inner side of the rotating mop when the mop is rotating for cleaning, and the outer cleaning parts 38 are used to help scrape off dirt on the outer side of the rotating mop when the mop is rotating for cleaning. Preferably, the inner cleaning parts 37 and the outer cleaning parts 38 can be cleaning scrapers or comb teeth structures or roller structures.

[0053] The above is an introduction to the mop bucket backflow prevention cleaning device provided by the utility model. This article uses specific examples to illustrate the principle and implementation of the utility model. The description of the above embodiments is only used to help understand the utility model and its core ideas. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified in a number of ways, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A backflow prevention cleaning device for a mop bucket, installed at the upper part of the inner cavity of the mop bucket, comprises a bucket body, wherein the bucket body is provided with a cleaning area for accommodating a rotating mop for cleaning, characterized in that: The barrel body has a top surface, the cleaning area has an opening located on the top surface of the barrel body and facing upward for the rotary mop to be placed in, a water inlet pipe is arranged on the top surface, a water injection port is arranged on the water inlet pipe, and the water injection port opens toward the cleaning area and is used to supply water to the cleaning area.

2. The backflow prevention cleaning device for a mop bucket according to claim 1, characterized in that: The barrel body includes a barrel body with a cavity therein and a barrel bottom, the barrel bottom covers the opening at the bottom of the barrel body to form a cleaning area opening upward, the upper top of the barrel body is provided with a lateral extension portion extending laterally, and the water inlet pipe is arranged on the top surface of the lateral extension portion.

3. The backflow prevention cleaning device for a mop bucket according to claim 2, characterized in that: The lateral extension portion is provided with a water retaining edge surrounding the opening of the cleaning area and extending upward, the water inlet pipe is located outside the water retaining edge, and the water retaining edge is provided with a through hole to connect with the water injection port or for the water inlet pipe to pass through.

4. The backflow prevention cleaning device for a mop bucket according to claim 3, characterized in that: The inner wall surface of the water retaining edge and the inner wall surface of the barrel body have a smooth transition.

5. The backflow prevention cleaning device for a mop bucket according to claim 4, characterized in that: The lateral extension portion is connected to a pressure cover, which has an inner cavity opening downward. When the pressure cover is closed on the top surface of the lateral extension portion, it is combined with the lateral extension portion to form the water inlet pipe. The lateral extension portion is provided with a through hole running through the upper and lower sides. The through hole is covered by the pressure cover at the bottom and is opposite to the opening at the bottom of the pressure cover. The pressure cover has a lateral opening, and one end of the pressure cover with the lateral opening is inserted into the through-opening. The lateral opening is combined with the bottom edge of the through-opening to form the water injection port. The bottom edge of the through-opening is an arc edge connecting the opening edge of the cleaning area and the top surface of the lateral extension portion. The pressure cover is provided with an extending sealing plate, which seals the gap between the through-opening and the pressure cover.

6. The backflow prevention cleaning device for a mop bucket according to claim 2, characterized in that: The transversely extending portion is provided with an inserting portion extending downward, and the inserting portion is used for plugging with the mop bucket.

7. The backflow prevention cleaning device for a mop bucket according to claim 3, characterized in that: The upper end of the barrel body is connected with a water retaining cover plate, and the water retaining cover plate is provided with a socket located above the cleaning area for the rotary mop to pass through. The socket is smaller than the opening of the cleaning area to form a circle of water retaining part above the opening of the cleaning area, and the upper edge of the water retaining edge abuts against the lower surface of the water retaining cover plate.

8. The backflow prevention cleaning device for a mop bucket according to claim 7, characterized in that: The inner side of the water retaining portion has a downwardly rolled edge portion, the rolled edge portion is opposite to the water injection port and blocks at least a portion of the water injection port, and there is a distance between the rolled edge portion and the water injection port for water to flow into the cleaning area.

9. The backflow prevention cleaning device for a mop bucket according to claim 7, characterized in that: A circle of convex edges extending upwards is provided on the top surface of the transverse extension part, and the convex edges surround the outer side of the water retaining edge. A circle of vertical side walls extending downwards is provided on the water retaining cover plate, and downwardly extending undercuts are provided on the vertical side walls. A buckle groove corresponding to the undercut is provided on the top surface of the transverse extension part. When the water retaining cover plate is closed on the top of the barrel body, the vertical side wall abuts against the top surface of the transverse extension part and forms a socket connection with the convex edges, and the undercut is buckled and connected with the buckle groove.

10. The backflow prevention cleaning device for a mop bucket according to claim 1, characterized in that: A supporting portion for supporting the rotary mop to rotate in the cleaning area is provided at the bottom of the cleaning area.

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