A leak-proof structure for a cleaning machine

Abstract

This invention discloses a leak-proof structure for a cleaning machine. It includes a lower shell and an upper cover. An inner liner is fixed to the inner side of the lower shell, and an inner door cover corresponding to the inner liner is fixed to the inner side of the upper cover. A raised rib is fixed to the bottom of the inner door cover. A rib slot matching the raised rib is provided at the upper end of the inner liner. The raised rib and the rib slot are interlocked vertically. A drainage rib is also fixed to the bottom of the inner door cover, located inside the raised rib. A fitting groove matching the drainage rib is provided on the inner wall of the inner liner. A return hole is provided on the inner liner. The bottom of the raised rib slot and the inner wall of the inner liner are connected through the return hole. The beneficial effect of this invention is that the door can be sealed without adding an elastic sealing strip.

Description

Technical Field

[0001] This invention relates to the technical field of waterproof structures for cleaning machines, and in particular to a waterproof structure for a cleaning machine. Background Technology

[0002] A spray cleaning machine is a cleaning device that uses water pressure to rinse the surface of an object. It removes and washes away dirt from the surface of the object, thus cleaning the surface and helping people reduce the cleaning burden.

[0003] Traditional cleaning machine door sealing structures typically use elastic sealing strips at the door's opening and closing points. The door relies on the pressure of the door to achieve a sealing effect. However, as the elastic material weakens over time, the sealing effect deteriorates. Furthermore, dirt from washing inside the cleaning machine can easily get trapped in the sealing strip's mounting groove, requiring the strip to be removed for cleaning, causing significant inconvenience to the user.

[0004] In summary, there is a need for a waterproof structure for cleaning machines that can seal the door without requiring an additional elastic sealing strip. Summary of the Invention

[0005] The present invention aims to overcome the shortcomings of existing technologies where elastic sealing strips weaken over time, resulting in poor sealing performance of the door and easy accumulation of dirt in the installation groove of the sealing strip, requiring disassembly of the sealing strip for cleaning. It provides a water-proof structure for a cleaning machine that can seal the door without the need to add an elastic sealing strip.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A leak-proof structure for a cleaning machine includes a lower shell and an upper cover. An inner liner is fixed to the inner side of the lower shell, and an inner door cover corresponding to the inner liner is fixed to the inner side of the upper cover. An inner door cover rib is fixed to the bottom of the inner door cover. A rib slot matching the inner door cover rib is provided at the upper end of the inner liner. The inner door cover rib and the rib slot are interlocked vertically. A drainage rib is also fixed to the bottom of the inner door cover, located inside the inner door cover rib. The inner wall of the inner liner is provided with… The inner liner has a reflux hole and a matching groove that matches the drainage rib. The bottom of the rib slot is connected to the inner wall of the inner liner through the reflux hole. The bottom of the top cover has a locking cavity located outside the inner door cover. The bottom surface of the locking cavity has a latching hole. A latch matching the latching hole is fixed at the upper port of the lower shell. A latch is installed in the locking cavity. One end of the latch engages with the latch, and the other end of the latch rests on the outer surface of the top cover.

[0007] The lower shell and upper cover are connected by an inner door cover rib and rib slot, resulting in a simple structure and convenient operation. A drainage rib is installed on the inner side of the bottom of the inner door cover, blocking the connection gap between the inner door cover rib and rib slot, effectively preventing internal washing water from rushing out through the connection gap and guiding water that splashes onto the inner door cover wall back into the inner tank. A return hole design allows the minimal amount of water that might overflow the drainage rib and flow into the rib slot to be returned to the inner tank. This design eliminates the need for an additional elastic sealing strip to seal the door, resulting in a simple, reliable, and lower-cost structure. When the upper cover is placed on the upper end of the lower shell, the latch passes through the latch hole into the lock cavity and automatically engages with one end of the latch tongue, thus locking the upper cover. To remove the upper cover, the user can move the other end of the latch tongue, causing it to move and separating one end from the latch tongue, thus unlocking the upper cover. The structure is simple and easy to operate. The positioning and cooperation of the locking block through hole and the latch plays a guiding role in the assembly between the upper cover and the lower shell, allowing the user to accurately place the upper cover on the upper port of the lower shell. At the same time, the hot air from the washing cannot easily blow the door open, making it easy to operate and reliable.

[0008] Preferably, a latch frame is fixed inside the lock cavity. The latch includes a rotating column, which is mounted on and rotatably connected to the latch frame. A locking rod and a lever are provided on the rotating column. One end of the locking rod is fixed to the side wall of the rotating column, and the other end of the locking rod is engaged with the latch. One end of the lever is fixed to the side wall of the rotating column. The outer surface of the top cover has a lever hole communicating with the lock cavity. The other end of the lever is placed in the lever hole and movably connected to it. The lever, rotating column, and locking rod are integrated into a single injection-molded design. When the top cover needs to be removed, the user can move the lever at the lever hole, which causes the locking rod on the rotating column to swing, separating the other end of the locking rod from the latch, thus unlocking the top cover. The structure is simple and the operation is convenient.

[0009] Preferably, the outer wall of the top cover is provided with a handle groove, and the lever hole is located on the upper wall of the handle groove. Both the locking rod and the lever are L-shaped and are respectively positioned on opposite sides of the rotating column. The other end of both the locking rod and the lever is located below the rotating column. The other end of the locking rod is positioned between the rotating column and the latching through hole. A first buckle is fixed to the other end of the locking rod, located on the side of the locking rod closest to the latching through hole. A second buckle, matching the first buckle, is fixed to the latch. The other end of the locking rod engages with the latch through the cooperation of the first and second buckles. The handle groove design facilitates user access to the top cover. When the top cover needs to be removed, since the other end of the lever is located on the upper wall of the handle groove, the user can use their finger to push the other end of the lever upwards, causing the locking rod on the rotating column to swing downwards. This causes the first buckle on the other end of the locking rod to flip downwards and disengage from the second buckle on the latch, thus unlocking the top cover and easily lifting it. The structure is simple and the operation is convenient.

[0010] Preferably, a spring frame is fixed inside the lock cavity, and a lever return spring is installed on the spring frame. The lever return spring is located above the lever, with its top end connected to the spring frame and its bottom end connected to the lever. The other end of the lever is pressed against the lever hole by the elastic force of the lever return spring, which prevents the lock lever from separating from the lock latch due to accidental rotation, thus improving the stability of the locking mechanism. At the same time, the lever return spring also enables the entire lock latch to automatically return to its original position.

[0011] Preferably, a connecting pipe is fixed to the bottom surface of the inner liner. The lower end of the connecting pipe is located outside the inner liner and a water inlet connector is installed thereon. A partition is fixed inside the connecting pipe and is located above the water inlet connector. A water passage hole is provided on the partition. An elastic check valve matching the water passage hole is installed on the bottom surface of the partition. The upper end of the connecting pipe is located inside the inner liner and a spray assembly is installed thereon. The spray assembly and the connecting pipe are interlocked. The partition is located below the spray assembly. A bottom post matching the elastic check valve is provided at the bottom of the spray assembly. When the spray assembly is removed, the water flowing in from the inlet pipe connector automatically presses the elastic check plate against the baffle and blocks the water passage, preventing water leakage and water pressure loss. This effectively maintains water pressure and improves the cleaning effect. When the spray assembly is inserted into the connecting pipe, the bottom post of the spray assembly automatically presses the elastic check plate down, opening the water passage. Water can then flow through the water passage to the spray assembly to spray and wash the object. This design allows users to achieve two water distribution methods by disassembling or installing the spray assembly. The structure is simple and the operation is convenient.

[0012] Preferably, a placement basket is installed inside the inner liner, and the placement basket and the inner liner are vertically movably connected. The spray assembly includes a spray arm connector, and the spray arm connector includes an upper limit block. The upper limit block is installed on the placement basket, and the lower top column is fixed to the bottom of the upper limit block. A spray arm assembly is sleeved on the lower top column. An external thread area is provided on the side wall of the lower top column, and a fastening nut is installed at the external thread area. The spray arm assembly is installed between the upper limit block and the fastening nut. A connecting pipe limiting groove is provided on the side of the fastening nut facing the connecting pipe. The upper end of the connecting pipe is installed in the connecting pipe limiting groove and is sealed to it. A water cavity is provided inside the spray arm assembly. An axial flow guide groove is provided on the side wall of the lower top column. The axial flow guide groove is located inside the external thread area. The water passage hole and the water cavity are connected through the axial flow guide groove. When the spray assembly is inserted into the connecting pipe, the lower top post at the bottom of the spray assembly automatically presses down the elastic check plate, causing the water inlet to open automatically. At this time, the water flows into the water chamber of the spray arm assembly through the water inlet and the axial guide groove, and is sprayed onto the object to be washed through the spray nozzles on the surface of the spray arm assembly. When the spray assembly needs to be removed, simply lift the basket upwards to pull the entire spray assembly out from the upper end of the connecting pipe. The structure is simple and the operation is convenient. When different types of spray arm assemblies need to be replaced, simply rotate the fastening nut from the external thread area of ​​the lower top post to remove the old spray arm assembly fitted on the lower top post for replacement, in order to adapt to different washing scenarios and greatly improve the user experience.

[0013] Preferably, the bottom surface of the placement basket is provided with a U-shaped limiting frame that matches the upper limit block. The U-shaped limiting frame is composed of two symmetrical vertical limiting rods and one horizontal limiting rod. The vertical limiting rod includes a rod segment one and a rod segment two. The rod segment two is located between the rod segment one and the horizontal limiting rod. The connection between the rod segment one and the rod segment two is smoothly transitioned by rounded corners. The rod segments one of the two vertical limiting rods are parallel to each other and the distance between them is greater than the width of the upper limit block. Vertical limiting grooves are provided on the side walls of the upper limit block on both sides. The rod segments two of the two vertical limiting rods are parallel to each other and the distance between them matches the distance between the bottom surfaces of the two vertical limiting grooves. A horizontal limiting groove that matches the horizontal limiting rod is also provided on the side wall of the upper limit block. During installation, first place the upper limit block between the two rod segments. Then, align the vertical limiting groove on the upper limit block with the rod segment and insert it along the rod segment until the horizontal limiting rod is engaged in the horizontal limiting groove. This completes the installation of the upper limit block on the basket. The structure is simple and the operation is convenient. The combined limiting of the vertical and horizontal limiting rods greatly improves the installation stability of the upper limit block.

[0014] Preferably, a sealing ring is provided inside the limiting groove of the connecting pipe, and the fastening nut and the connecting pipe are sealed together by the sealing ring. The upper end of the connecting pipe is sealed with the fastening nut by the sealing ring, which effectively prevents leakage of washing water, ensures the flushing pressure of the washing water, and improves the cleaning effect of washing.

[0015] Preferably, a second sealing ring is installed on the water inlet pipe connector, and the water inlet pipe connector and the connecting pipe are sealed together by the second sealing ring. The lower end of the connecting pipe is sealed to the water inlet pipe connector by the second sealing ring, which effectively prevents leakage of washing water, ensures the flushing pressure of the washing water, and improves the cleaning effect of washing.

[0016] Preferably, a locking head is fixed to the bottom surface of the partition, the locking head is positioned on the side of the water passage hole, and a protrusion is provided at the edge of the elastic anti-reverse slip. The protrusion has a locking hole that matches the locking head, and the locking head and the locking hole engage with each other. The protrusion is installed between the partition and the water inlet pipe connector, and a water passage hole rib is provided at the lower edge of the water passage hole. During installation, the anti-reverse slip is installed on the bottom surface of the partition through the cooperation of the locking head and the locking hole, and is fixed by the water inlet pipe connector pressing down on the protrusion on the anti-reverse slip. The structure is simple and the operation is convenient. The water passage hole is sealed by the anti-reverse slip and the water passage hole rib abutting against each other, further improving the sealing performance.

[0017] The beneficial effects of this invention are: simple structure and convenient operation; the door can be sealed without the need for an additional elastic sealing strip, resulting in a simple, reliable, and lower-cost structure; convenient for users to remove the top cover; improved locking stability; prevention of water pressure loss and waste, effectively maintaining water pressure and improving the cleaning effect; two water distribution methods can be achieved by disassembling or installing the spray assembly; different types of spray arm assemblies can be replaced to adapt to different washing scenarios, greatly improving the user experience; improved installation stability; and improved sealing performance. Attached Figure Description

[0018] Figure 1 This is a perspective view of the present invention; Figure 2 This is a top view of the present invention; Figure 3 yes Figure 2 Sectional view at point AA; Figure 4 yes Figure 3 Enlarged view of point B in the middle; Figure 5 This is a front view of the present invention; Figure 6 yes Figure 5 Sectional view at CC; Figure 7 yes Figure 6 Enlarged view at point E in the middle; Figure 8 yes Figure 6 Enlarged view at point F; Figure 9 yes Figure 5 Sectional view at point DD; Figure 10 yes Figure 9 A magnified view of point G in the middle.

[0019] In the diagram: 1. Lower shell, 2. Upper cover, 3. Inner liner, 4. Inner door cover, 5. Inner door cover rib, 6. Rib slot, 7. Drainage rib, 8. Return hole, 9. Lock cavity, 10. Locking hole, 11. Locking buckle, 12. Lock tongue bracket, 13. Rotating column, 14. Locking rod, 15. Lever, 16. Lever hole, 17. Handle groove, 18. Buckle body one, 19. Buckle body two, 20. Spring bracket, 21. Lever return spring, 22. Connecting pipe, 23. Water inlet connector, 24. Partition plate, 25. Water passage hole, 26. Elastic anti-reverse plate, 27. Lower top column, 28. Placement basket, 29. Upper limit block, 30. Spray arm assembly, 31. External thread area, 32. Fastening nut, 33. 34. Connecting pipe limiting groove; 35. Water cavity; 36. Axial guide groove; 37. Lateral limiting rod; 38. Rod segment one; 39. Rod segment two; 40. Vertical limiting groove; 41. Lateral limiting groove; 42. Sealing ring one; 43. Sealing ring two; 44. Clamp head; 45. Protrusion; 46. Clamping hole; 47. Water passage hole protrusion. Detailed Implementation

[0020] The present invention will now be further described with reference to the accompanying drawings and specific embodiments.

[0021] like Figure 1 In the described embodiment, a leak-proof structure for a cleaning machine includes a lower shell 1 and an upper cover 2, such as... Figure 5 , Figure 6 and Figure 7 As shown, an inner liner 3 is fixed to the inner side of the lower shell 1, and an inner door cover 4 corresponding to the inner liner 3 is fixed to the inner side of the upper cover 2. An inner door cover rib 5 is fixed to the bottom of the inner door cover 4. A rib slot 6 matching the inner door cover rib 5 is provided at the upper end of the inner liner 3. The inner door cover rib 5 and the rib slot 6 are inserted vertically. A drainage rib 7 is also fixed to the bottom of the inner door cover 4, located inside the inner door cover rib 5. A fitting groove matching the drainage rib 7 is provided on the inner wall of the inner liner 3. A return hole 8 is provided on the inner liner 3. The bottom of the rib slot 6 is connected to the inner wall of the inner liner 3 through the return hole 8. Figure 2 , Figure 3 and Figure 4As shown, the bottom of the upper cover 2 is provided with a lock cavity 9, which is located on the outside of the inner door cover 4. A latch through hole 10 is provided on the bottom surface of the lock cavity 9. A latch 11 that matches the latch through hole 10 is fixed at the upper port of the lower shell 1. A latch tongue is installed in the lock cavity 9. One end of the latch tongue is engaged with the latch 11, and the other end of the latch tongue is placed on the outer surface of the upper cover 2.

[0022] The lock cavity 9 has a fixed lock tongue frame 12 inside. The lock tongue includes a rotating column 13, which is mounted on the lock tongue frame 12 and rotatably connected to it. The rotating column 13 is provided with a lock rod 14 and a lever 15. One end of the lock rod 14 is fixed to the side wall of the rotating column 13, and the other end of the lock rod 14 is engaged with the lock buckle 11. One end of the lever 15 is fixed to the side wall of the rotating column 13. The outer surface of the upper cover 2 is provided with a lever hole 16 that communicates with the lock cavity 9. The other end of the lever 15 is placed in the lever hole 16 and movably connected to it.

[0023] The outer wall of the top cover 2 is provided with a handle groove 17. The lever hole 16 is located on the upper end wall of the handle groove 17. The locking rod 14 and the lever 15 are both L-shaped and are respectively located on opposite sides of the rotating column 13. The other end of the locking rod 14 and the other end of the lever 15 are located below the rotating column 13. The other end of the locking rod 14 is placed between the rotating column 13 and the latching through hole 10. A buckle body 18 is fixed on the other end of the locking rod 14. The buckle body 18 is located on the side of the locking rod 14 near the latching through hole 10. A buckle body 2 19 that matches the buckle body 18 is fixed on the latching 11. The other end of the locking rod 14 is engaged with the latching 11 through the cooperation of the buckle body 18 and the buckle body 2 19.

[0024] Inside the locking cavity 9, a spring frame 20 is fixed, and a lever return spring 21 is installed on the spring frame 20. The lever return spring 21 is located above the lever 15. The top end of the lever return spring 21 is connected to the spring frame 20, and the bottom end of the lever return spring 21 is connected to the lever 15.

[0025] like Figure 5 , Figure 6 and Figure 8 As shown, a connecting pipe 22 is fixed on the bottom surface of the inner liner 3. The lower end of the connecting pipe 22 is located outside the inner liner 3 and a water inlet connector 23 is installed on it. A partition 24 is fixed inside the connecting pipe 22. The partition 24 is located above the water inlet connector 23. A water passage hole 25 is provided on the partition 24. An elastic check valve 26 matching the water passage hole 25 is installed on the bottom surface of the partition 24. The upper end of the connecting pipe 22 is located inside the inner liner 3 and a spray assembly is installed on it. The spray assembly and the connecting pipe 22 are interlocked. The partition 24 is located below the spray assembly. A lower top post 27 matching the elastic check valve 26 is provided at the bottom of the spray assembly.

[0026] The inner liner 3 houses a placement basket 28, which is vertically connected to the inner liner 3. The spray assembly includes a spray arm connector, which includes an upper limit block 29. The upper limit block 29 is mounted on the placement basket 28. A lower top column 27 is fixed to the bottom of the upper limit block 29. A spray arm assembly 30 is sleeved on the lower top column 27. An external thread area 31 is provided on the side wall of the lower top column 27, and a fastening nut 32 is installed at the external thread area 31. The spray arm assembly 30 is mounted on the upper... Between the limiting block 29 and the fastening nut 32, a connecting pipe limiting groove 33 is provided on the side of the fastening nut 32 facing the connecting pipe 22. The upper end of the connecting pipe 22 is installed in the connecting pipe limiting groove 33 and is sealed to it. A water cavity 34 is provided inside the spray arm assembly 30. An axial flow guide groove 35 is provided on the side wall of the lower top column 27. The axial flow guide groove 35 is located inside the external thread area 31. The water passage hole 25 and the water cavity 34 are connected through the axial flow guide groove 35.

[0027] like Figure 5 , Figure 9 and Figure 10 As shown, a U-shaped limiting frame matching the upper limit block 29 is provided on the bottom surface of the basket 28. The U-shaped limiting frame consists of two symmetrical vertical limiting rods and a horizontal limiting rod 36. The vertical limiting rods include rod segment 37 and rod segment 38. Rod segment 38 is located between rod segment 37 and the horizontal limiting rod 36. The connection between rod segment 37 and rod segment 38 is smoothly transitioned by rounded corners. The rod segments 37 of the two vertical limiting rods are parallel to each other and the distance between them is greater than the width of the upper limit block 29. Vertical limiting grooves 39 are provided on the side walls of the upper limit block 29 on both sides. The rod segments 38 of the two vertical limiting rods are parallel to each other and the distance between them matches the distance between the bottom surfaces of the two vertical limiting grooves 39. A horizontal limiting groove 40 matching the horizontal limiting rod 36 is also provided on the side wall of the upper limit block 29.

[0028] like Figure 5 , Figure 6 and Figure 8 As shown, a sealing ring 41 is provided inside the connecting pipe limiting groove 33, and the fastening nut 32 and the connecting pipe 22 are sealed and connected by the sealing ring 41.

[0029] A sealing ring 42 is installed on the water inlet connector 23, and the water inlet connector 23 and the connecting pipe 22 are sealed together by the sealing ring 42.

[0030] A clip 43 is fixed on the bottom surface of the partition 24. The clip 43 is placed on the side of the water passage hole 25. A protrusion 44 is provided at the edge of the elastic anti-reverse plate 26. The protrusion 44 is provided with a clip hole 45 that matches the clip 43. The clip 43 and the clip hole 45 are engaged with each other. The protrusion 44 is installed between the partition 24 and the water inlet pipe connector 23. A water passage hole protrusion 46 is provided at the lower port edge of the water passage hole 25.

[0031] The self-locking principle of the upper cover: When the upper cover 2 is placed on the upper port of the lower shell 1, the latch 11 passes through the latch through hole 10 and enters the lock cavity 9, and automatically engages with the locking rod 14 to lock the upper cover 2. When the upper cover 2 needs to be removed, since the other end of the lever 15 is set on the upper wall of the handle groove 17, the user can push the other end of the lever 15 upward with his finger, thereby causing the locking rod 14 on the rotating column 13 to swing downward, so that the latch body 18 on the other end of the locking rod 14 flips downward and disengages from the latch body 19 on the latch 11, thereby unlocking the upper cover 2 and making it easy to lift the upper cover 2.

[0032] Sealing principle of the top cover: By setting the drainage rib 7 on the inner side of the bottom of the inner door cover 4, it blocks the connection gap between the inner door cover protrusion rib 5 and the protrusion rib slot 6 from the inside, which effectively prevents the water from washing inside from rushing out from the connection gap, and can guide the water that rushes onto the wall of the inner door cover 4 to the inner tank 3. The very small amount of water that may roll over the drainage rib 7 and flow into the protrusion rib slot 6 can be guided back into the inner tank 3 through the return hole 8.

[0033] Self-locking water distribution principle: When the spray assembly is inserted into the connecting pipe 22, the lower top post 27 at the bottom of the spray assembly automatically presses down the elastic check plate 26, causing the water passage hole 25 to open automatically. At this time, the water flow will flow into the water chamber 34 of the spray arm assembly 30 through the water passage hole 25 and the axial guide groove 35, and then be sprayed out to wash the object through the spray nozzles on the surface of the spray arm assembly 30. When the spray assembly needs to be removed, simply lift the placement basket 28 upwards to pull the entire spray assembly out from the upper port of the connecting pipe 22. After the spray assembly is removed, the water flowing in from the water inlet connector 23 will automatically press the elastic check plate 26 against the partition plate 24 and block the water passage hole 25, preventing water leakage from the water passage hole 25. With this design, users can achieve two water distribution methods by disassembling or installing the spray assembly.

[0034] Spray arm assembly replacement principle: When it is necessary to replace a different type of spray arm assembly 30, simply rotate the fastening nut 32 off from the external thread area 31 of the lower top column 27 to remove the old spray arm assembly fitted on the lower top column 27 for replacement, to adapt to different washing scenarios. When it is necessary to install the spray assembly onto the placement basket 28, first place the upper limit block 29 between the two rod segments 38, then align the vertical limiting groove 39 of the upper limit block 29 with the rod segment 37 and insert it along the rod segment 37 until the horizontal limiting rod 36 is engaged in the horizontal limiting groove 40, thus completing the installation of the upper limit block 29 onto the placement basket 28.

[0035] The structure of this application can be applied to the field of dishwashers. By setting a drainage rib 7 on the inner side of the bottom of the inner door cover 4, it blocks the connection gap between the inner door cover protrusion rib 5 and the protrusion rib slot 6 from the inside. By setting a return hole 8, a very small amount of water that may have flowed over the drainage rib 7 and into the protrusion rib slot 6 is diverted back into the inner tank 3. This allows the dishwasher to seal the door without adding an elastic sealing strip, thereby achieving the effect of preventing water leakage.

Claims

1. A leak-proof structure for a cleaning machine, characterized in that, The device includes a lower shell (1) and an upper cover (2). An inner liner (3) is fixed to the inner side of the lower shell (1). An inner door cover (4) corresponding to the inner liner (3) is fixed to the inner side of the upper cover (2). An inner door cover rib (5) is fixed to the bottom of the inner door cover (4). A rib slot (6) matching the rib (5) is provided at the upper end of the inner liner (3). The rib (5) and the rib slot (6) are inserted vertically. A drainage rib (7) is also fixed to the bottom of the inner door cover (4). The drainage rib (7) is located inside the rib (5). A drainage rib (7) matching the rib (5) is provided on the inner wall of the inner liner (3). The inner liner (3) is provided with a matching groove, and a return hole (8) is provided on the inner liner (3). The bottom of the rib slot (6) is connected to the inner wall of the inner liner (3) through the return hole (8). The bottom of the upper cover (2) is provided with a lock cavity (9). The lock cavity (9) is located on the outside of the inner door cover (4). A latch through hole (10) is provided on the bottom surface of the lock cavity (9). A latch (11) matching the latch through hole (10) is fixed at the upper port of the lower shell (1). A latch tongue is installed in the lock cavity (9). One end of the latch tongue is engaged with the latch (11), and the other end of the latch tongue is placed on the outer surface of the upper cover (2).

2. The water-proof structure of a cleaning machine according to claim 1, characterized in that, The lock cavity (9) is fixed with a lock tongue frame (12). The lock tongue includes a rotating column (13). The rotating column (13) is mounted on the lock tongue frame (12) and rotatably connected to it. The rotating column (13) is provided with a lock rod (14) and a lever (15). One end of the lock rod (14) is fixed on the side wall of the rotating column (13). The other end of the lock rod (14) is engaged with the lock buckle (11). One end of the lever (15) is fixed on the side wall of the rotating column (13). The outer surface of the upper cover (2) is provided with a lever hole (16) that communicates with the lock cavity (9). The other end of the lever (15) is placed in the lever hole (16) and movably connected to it.

3. The water-proof structure of a cleaning machine according to claim 2, characterized in that, The outer wall of the cover (2) is provided with a handle groove (17). The lever hole (16) is located on the upper wall of the handle groove (17). The shape of the locking rod (14) and the lever (15) are both L-shaped and are respectively set on opposite sides of the rotating column (13). The other end of the locking rod (14) and the other end of the lever (15) are both located below the rotating column (13). The other end of the locking rod (14) is placed between the rotating column (13) and the latch through hole (10). A buckle body one (18) is fixed on the other end of the locking rod (14). The buckle body one (18) is located on the side of the locking rod (14) close to the latch through hole (10). A buckle body two (19) that matches the buckle body one (18) is fixed on the latch (11). The other end of the locking rod (14) is engaged with the latch (11) through the cooperation of the buckle body one (18) and the buckle body two (19).

4. The water-proof structure of a cleaning machine according to claim 2, characterized in that, The lock cavity (9) is also fixed with a spring frame (20), and a lever return spring (21) is installed on the spring frame (20). The lever return spring (21) is located above the lever (15). The top end of the lever return spring (21) is connected to the spring frame (20), and the bottom end of the lever return spring (21) is connected to the lever (15).

5. A water-proof structure for a cleaning machine according to any one of claims 1-4, characterized in that, A connecting pipe (22) is fixed on the bottom surface of the inner liner (3). The lower port of the connecting pipe (22) is located outside the inner liner (3) and a water inlet connector (23) is installed on it. A partition (24) is fixed inside the connecting pipe (22). The partition (24) is located above the water inlet connector (23). A water passage hole (25) is provided on the partition (24). An elastic check valve (26) matching the water passage hole (25) is installed on the bottom surface of the partition (24). The upper port of the connecting pipe (22) is located inside the inner liner (3) and a spray assembly is installed on it. The spray assembly and the connecting pipe (22) are plugged into each other. The partition (24) is located below the spray assembly. A lower top post (27) matching the elastic check valve (26) is provided at the bottom of the spray assembly.

6. The water-proof structure of a cleaning machine according to claim 5, characterized in that, The inner liner (3) is equipped with a placement basket (28), which is movably connected to the inner liner (3) vertically. The spray assembly includes a spray arm connector, which includes an upper limit block (29). The upper limit block (29) is mounted on the placement basket (28). The lower top column (27) is fixed to the bottom of the upper limit block (29). A spray arm assembly (30) is sleeved on the lower top column (27). An external thread area (31) is provided on the side wall of the lower top column (27), and a fastening nut (32) is installed at the external thread area (31). The spray arm assembly (30) Installed between the upper limit block (29) and the fastening nut (32), the fastening nut (32) is provided with a connecting pipe limiting groove (33) on the side facing the connecting pipe (22), the upper end of the connecting pipe (22) is installed in the connecting pipe limiting groove (33) and sealed to it, the spray arm assembly (30) is provided with a water cavity (34) inside, the lower top column (27) is provided with an axial flow guide groove (35) on the side wall, the axial flow guide groove (35) is located inside the external thread area (31), and the water passage hole (25) and the water cavity (34) are connected through the axial flow guide groove (35).

7. The water-proof structure of a cleaning machine according to claim 6, characterized in that, The bottom surface of the placement basket (28) is provided with a U-shaped limiting frame that matches the upper limit block (29). The U-shaped limiting frame is composed of two symmetrical vertical limiting rods and one horizontal limiting rod (36). The vertical limiting rod includes rod segment one (37) and rod segment two (38). Rod segment two (38) is located between rod segment one (37) and the horizontal limiting rod (36). The connection between rod segment one (37) and rod segment two (38) is smoothly transitioned by rounded corners. The first segment (37) of the limiting rod is parallel to each other and the distance between them is greater than the width of the upper limit block (29). The upper limit block (29) has vertical limiting grooves (39) on both sides of its sidewalls. The second segment (38) of the two vertical limiting rods is parallel to each other and the distance between them is matched with the distance between the bottom surfaces of the two vertical limiting grooves (39). The sidewall of the upper limit block (29) is also provided with a transverse limiting groove (40) that matches the transverse limiting rod (36).

8. The water-proof structure of a cleaning machine according to claim 6, characterized in that, The connecting pipe limiting groove (33) is provided with a sealing ring (41), and the fastening nut (32) and the connecting pipe (22) are sealed and connected by the sealing ring (41).

9. The water-proof structure of a cleaning machine according to claim 6, characterized in that, A sealing ring 2 (42) is installed on the water inlet pipe connector (23), and the water inlet pipe connector (23) and the connecting pipe (22) are sealed together by the sealing ring 2 (42).

10. The water-proof structure of a cleaning machine according to claim 5, characterized in that, A clip (43) is fixed on the bottom surface of the partition (24). The clip (43) is placed on the side of the water passage hole (25). A protrusion (44) is provided at the edge of the elastic anti-reverse plate (26). A locking hole (45) matching the clip (43) is provided on the protrusion (44). The clip (43) and the locking hole (45) are locked together. The protrusion (44) is installed between the partition (24) and the water inlet pipe connector (23). A water passage hole protrusion (46) is provided at the lower port edge of the water passage hole (25).

Images