A mop with a mop head made of a rubberized cotton cloth

By incorporating two wringing mechanisms and a labor-saving lever structure into the PVA mop, the problems of incomplete wringing and excessive effort associated with traditional PVA mops are solved, resulting in more efficient wringing and greater ease of use.

CN122123618APending Publication Date: 2026-06-02胡国云

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
胡国云
Filing Date
2025-12-06
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

Traditional PVA mops require multiple pulls to effectively squeeze out liquid during the wringing process, and the wringing effect is not good, making them inconvenient to use.

Method used

The device employs a two-stage water squeezing method: the first stage involves initial water squeezing by a water squeezing roller at the opening of the housing, while the second stage involves overall deformation water squeezing within the housing cavity. Furthermore, a lever structure consisting of a pull rod and a sliding sleeve reduces the user's pulling resistance.

Benefits of technology

It achieves a more efficient water-squeezing effect, avoids the back-absorption of liquid by the PVC foam, reduces the user's operating effort, and improves user comfort and efficiency.

✦ Generated by Eureka AI based on patent content.

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Abstract

This invention belongs to the field of cleaning products technology, specifically referring to a sponge mop that saves effort in wringing out water. It includes a handle, a housing, and sponge material. The handle and housing are fixed or hinged together. Wringing rollers are provided on both sides of the opening of the housing, forming a first wringing position between the rollers. The inner cavity of the housing is a second wringing position, and the sponge material is deformably placed within this cavity. A pulling device is provided on the handle, including a sliding sleeve and a pull rod. The sliding sleeve is fitted onto the handle, and pull rods are located on both sides of the housing. One end of the pull rod is hinged to the sliding sleeve, and the other end is connected to the housing. A driven member is fixedly provided on the sponge material's support, and this driven member is connected to the middle of the pull rod. Pulling the sliding sleeve away from the sponge material moves the pull rod and pulls the sponge material into the housing. Pushing the sliding sleeve closer to the sponge material moves the pull rod and pushes the sponge material away from the housing. This invention provides a sponge mop with good wringing effect and effortless water removal.
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Description

Technical Field

[0001] This invention belongs to the field of cleaning product structure technology, specifically referring to a plywood mop that saves effort in wringing out water. Background Technology

[0002] PVA mops are a common type of mop. The mop head is made of polyvinyl alcohol (PVA) foam, which allows the mop to quickly absorb water and dirt, making it particularly suitable for daily household cleaning.

[0003] Traditional PVA mops typically include a pressure roller and a traction device. The traction device drives the PVA mop head to move relative to the pressure roller, which then squeezes and cleans the mop head. For example, Chinese patent CN202511291896.8 describes a PVA mop head, including a PVA mop head and a wringer. The wringer has a squeezing device on each side of the PVA mop head. During use, the PVA mop head moves relative to the squeezing device, which squeezes out water. The squeezing device includes… The product features left and right pressure roller groups positioned on either side of the PVC foam head, forming a squeezing gap between them for pressing the foam head. Each group includes at least two integrally designed rollers arranged vertically, extending through the squeezing frame and reaching both sides. Connectors at both ends connect the left and right roller groups, with elastic sections that pull the roller groups to press firmly against both sides of the PVC foam head. This product uses complete squeezing rollers for better water removal from the PVC foam. However, it also has some drawbacks: PVC foam is highly absorbent, and the liquid squeezed out by the squeezing rollers is absorbed back by the unsqueezed PVC foam. Therefore, in practical use, the PVC foam needs to be pulled through the squeezing device multiple times to achieve effective water removal. Summary of the Invention

[0004] The purpose of this invention is to provide a plywood mop that has a good wringing effect and saves effort in wringing out water.

[0005] The objective of this invention is achieved as follows:

[0006] A labor-saving squeezing mop includes a handle, a housing, and a sponge. The handle and the housing are fixed or hinged together. Squeezing rollers are provided on both sides of the opening of the housing, forming a first squeezing position between the two sides. The inner cavity of the housing is a second squeezing position, and the sponge can be deformably placed in the inner cavity of the housing. A pulling device is provided on the handle, which can drive the sponge to move. The sponge first passes through the first squeezing position for squeezing, and then enters the second squeezing position for overall deformation and squeezing.

[0007] The side of the PVC foam is provided with a support member, which keeps the PVC foam in a long strip shape during the squeezing and use processes.

[0008] The pulling device includes a sliding sleeve and a pull rod. The sliding sleeve is fitted onto the handle. Pull rods are provided on both sides of the sliding sleeve and the housing. One end of the pull rod is connected to the sliding sleeve and the other end is connected to the housing. A driven member is fixedly provided on the support of the rubber cotton, and the driven member is connected to the middle of the pull rod. Pulling the sliding sleeve away from the rubber cotton causes the pull rod to move and drive the rubber cotton into the housing. Pushing the sliding sleeve closer to the rubber cotton causes the pull rod to move and push the rubber cotton away from the housing.

[0009] Furthermore, the driven member is provided with several mounting positions along the direction of movement of the housing, and the support member of the rubber cotton is fixed at different mounting positions to control the distance between the rubber cotton and the housing.

[0010] Furthermore, the dewatering roller is a long roller, with long rollers on both sides squeezing the cotton; the long rollers are provided with sockets on both sides, the sockets are inserted into the ends of the long rollers, the exposed section of the sockets is provided with a protrusion, the housing is provided with mounting holes adapted to the protrusion, and the long rollers are rotatably mounted on the housing through the sockets.

[0011] Furthermore, the width of the inner cavity of the housing is greater than the width between the two squeezing rollers; the inner cavity of the housing is provided with several longitudinal guide ribs.

[0012] Furthermore, the upper end of the housing has an opening for the driven member to pass through, and guide ribs are provided on the side of the opening, so that the driven member can be moved out of the housing opening by relying on the guide ribs.

[0013] Furthermore, the pull rod is a telescopic rod assembly, which includes a first rod and a second rod that are nested together, and the first rod and the second rod cannot be completely separated; or, the pull rod is an independent connecting rod, one end of which is connected to the inclined groove of the housing, and the other end of which is provided with a sliding groove, with the sliding sleeve connecting shaft limited within the sliding groove.

[0014] Furthermore, the upper end of the housing is provided with an inner groove, and in the retracted state, the telescopic rod assembly is hidden in the inner groove; the housing is provided with a slanted groove or an arc-shaped groove, and one end of the telescopic rod assembly is limited on the slanted groove or arc-shaped groove.

[0015] Furthermore, the end of the pull rod is hinged with a roller, and the roller's axis of rotation is limited on the inclined groove or arc groove; the housing is provided with an inclined surface or arc surface adapted to the roller, and the roller rests on the inclined surface or arc surface during the movement of the pull rod.

[0016] Furthermore, a latch is slidably provided on the pull rod, and a hook is provided on the driven member. An elastic element acts on the latch, causing the latch to engage with the hook. When the latch is unlocked, the latch and the hook separate, and the adhesive can be removed from the pull rod.

[0017] Furthermore, the driven member has a protrusion at the opening on the side of the hook; the driven member moves toward the locking side, the engaging part of the locking member first moves against the guide surface of the hook, then abuts against the protrusion, and finally enters the hook under the action of the elastic member.

[0018] Furthermore, after the rubber cotton is pulled into the inner cavity of the shell, some of the rubber cotton deforms in the inner cavity of the shell, and some of the rubber cotton deforms at the position of the squeezing roller.

[0019] The outstanding and beneficial technical effects of this invention compared to the prior art are:

[0020] 1. This invention employs a two-stage squeezing method to remove water from the rubber cotton: The first stage involves a squeezing roller located at the opening of the housing to squeeze the incoming rubber cotton. The second stage involves squeezing the rubber cotton within the inner cavity of the housing, where it can deform and settle. The first stage is a preliminary squeezing process, removing most of the liquid from the rubber cotton. The second stage is a complete squeezing process, where the entire or most of the rubber cotton deforms within the inner cavity of the housing, effectively preventing the rubber cotton from absorbing liquid back and ensuring effective drainage. Due to the two-stage squeezing method, the resistance to pulling the rubber cotton into the housing is relatively high. Therefore, this application employs a lever structure consisting of a pull rod and a sliding sleeve, where the two pull rods work together on the driven member, allowing the user to pull the rubber cotton with less effort. In particular, the end of the telescopic rod assembly is hinged to a roller, and the roller's rotation axis is limited on the inclined or arc-shaped groove. The roller reduces the moving resistance of the telescopic rod assembly, making it even easier for the user.

[0021] 2. The long roller of the present invention is provided with sleeve joints at both ends, and the exposed section of the sleeve joint is provided with a protruding edge. The housing is provided with mounting holes adapted to the protruding edge. The long roller is rotatably mounted on the housing through the sleeve joints. This structure facilitates assembly by workers. The worker first places two sleeve joints at both ends of the long roller, then inserts the protruding edge of one sleeve joint into one mounting hole, and then applies external force to make the protruding edge of the other sleeve joint engage in the other mounting hole. Preferably, the long roller is made of hollow metal tube, and the metal can be made of stainless steel, stainless iron, aluminum tube, etc.

[0022] 3. The adhesive cotton of this invention has a detachable structure, allowing the user to easily remove it using the locking mechanism. Conversely, for assembly, simply align the adhesive cotton with the opening of the housing and push the driven member into the housing; once fully inserted, assembly is complete. During installation, the user cannot observe the actual state inside the housing. Therefore, this application incorporates several structures to eliminate the need for alignment during installation: a) The driven member has a protrusion at the side opening of the latch; as the driven member moves towards the latch, the latch engagement part first moves against the guide surface of the latch, then abuts against the protrusion, and finally enters the latch under the action of the elastic member. b) The upper end of the housing has an opening for the driven member to pass through, and guide ribs are provided on the side of the opening, allowing the driven member to move out of the housing opening using the guide ribs. Through the guide ribs, the driven member can be directly moved out of the opening and engage with the latch. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the PVC foam in the un-squeezed-out state of the present invention;

[0024] Figure 2 This is a schematic diagram of the internal structure of the PVC foam in the un-squeezed-out state of the present invention;

[0025] Figure 3 yes Figure 2 A magnified structural diagram at point A;

[0026] Figure 4 This is one of the structural schematic diagrams of the PVC foam in the dewatering state of the present invention;

[0027] Figure 5 This is the second schematic diagram of the structure of the PVC foam in the dewatering state of the present invention;

[0028] Figure 6 This is a schematic diagram of the internal structure of the PVC foam in the dewatering state of the present invention;

[0029] Figure 7 yes Figure 6 A magnified structural diagram at point B;

[0030] Figure 8 This is one of the exploded structural diagrams of the present invention;

[0031] Figure 9 This is the second schematic diagram of the exploded structure of the present invention;

[0032] Figure 10 yes Figure 9 A magnified structural diagram at point C;

[0033] Figure 11 This is a schematic diagram of the driven component structure of the present invention;

[0034] Figure 12 This is a schematic diagram of the shell structure of the present invention;

[0035] Figure 13 This is a partial structural schematic diagram of the present invention.

[0036] In the figure: 1-shell; 10-shell cavity; 101-longitudinal guide rib; 102-guide rib; 103-opening;

[0037] 11-Squeeze roller; 111-Sleeve joint; 112-Raised edge; 12-Inner groove; 121-Beveled surface; 13-Mounting hole;

[0038] 19- Inclined groove; 20- Independent connecting rod; 201- Slide groove; 21- First rod; 22- Second rod; 221- Groove opening; 23- Lock; 231- Lock engagement part; 24- Roller; 241- Rotating shaft; 29- Spring; 7- Slide sleeve;

[0039] 71-Sliding sleeve hinge shaft; 8-Handle lever; 9-Glue; 91-Support component; 92-Driven component; 921-Hook;

[0040] 922 - Mounting position; 923 - Protrusion; 924 - Guide surface. Detailed Implementation

[0041] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Figure 1-13 As shown:

[0042] A labor-saving squeezing mop for using PVA sponge includes a handle 8, a housing 1, and PVA sponge 9. The handle 8 and housing 1 are fixed or hinged together, with the connection method between the handle 8 and housing determined by the manufacturer; direct fixing or rotational connection are both possible. Squeezing rollers 11 are provided on both sides of the opening of the housing 1, forming a first squeezing position between the two rollers 11. The inner cavity 10 of the housing is a second squeezing position, where the PVA sponge 9 can be deformably placed. A pulling device is provided on the handle 8, which drives the PVA sponge to move. The PVA sponge first passes through the first squeezing position for squeezing, and then enters the second squeezing position for overall deformation and squeezing. Through these two squeezing steps, the PVA sponge can be effectively squeezed out of water. In particular, the squeezing method of deforming the PVA sponge entirely within the inner cavity of the housing effectively prevents the squeezed liquid from being drawn back onto the PVA sponge, resulting in excellent squeezing performance. Furthermore, a support member 91 is provided on the side of the PVA sponge, which keeps the PVA sponge in a long strip shape during the squeezing and use processes. The cotton wool remains in a long strip shape during the squeezing process, so the squeezing process does not cause the cotton wool to fold in the middle, and the overall integrity is not damaged, resulting in a high aesthetic appearance of the product.

[0043] The pulling device includes a sliding sleeve 7 and a pull rod. The sliding sleeve 7 is sleeved on the handle 1. Pull rods are provided on both sides of the sliding sleeve 7 and the housing 1. One end of the pull rod is connected to the sliding sleeve 7 and the other end is connected to the housing 1. A driven member 92 is fixedly provided on the support member 91 of the rubber cotton, and the driven member 92 is connected to the middle of the pull rod. Pulling the sliding sleeve away from the rubber cotton moves the pull rod and drives the rubber cotton 9 into the housing 1. Pushing the sliding sleeve closer to the rubber cotton moves the pull rod and pushes the rubber cotton away from the housing. Pulling the rubber cotton into the housing is relatively strenuous for the user. Therefore, this application adopts a force-saving lever structure. The force-saving lever structure on both sides pulls the rubber cotton simultaneously. The specific force-saving lever structure is as follows: the driven member is connected to the middle of the pull rod. One end of the pull rod rests on the housing and the other end is connected to the sliding sleeve. Pulling the sliding sleeve can drive the rubber cotton in and out of the housing. The operation is simple and effortless for the user. The "middle" of the driven member connection in the tie rod refers to the area excluding both ends of the tie rod. It can be a position slightly forward of the tie rod center, the center of the tie rod, or a position slightly backward of the tie rod center. The specific installation of the tie rod is determined by the manufacturer.

[0044] The pull rod can be implemented in at least two ways: Method 1: The pull rod is a telescopic rod assembly, comprising a first rod 21 and a second rod 22 that are interlocked. The lower end of the first rod is connected to the inclined groove 19 of the housing, and the upper end of the second rod is hinged to the sliding sleeve. The first rod 21 has a protrusion or a positioning pin, and the second rod has a groove 221 for the limiting protrusion or positioning pin. This structure allows the telescopic rod assembly to extend and shorten, but the rods cannot be detached. Preferably, the telescopic rod assembly uses two interlocking rod sections, but multiple sections are also possible. Method 2, such as... Figure 13 As shown, the rod is an independent connecting rod 20. One end of the independent connecting rod 20 is connected to the inclined groove 19 of the housing, and the other end of the independent connecting rod is provided with a sliding groove 201. The sliding sleeve connecting shaft 71 is limited within the sliding groove 201. That is, in method 2, both ends of the independent connecting rod are respectively connected to the sliding sleeve and the housing, which are the spaces that need to move. Both methods are acceptable, and the manufacturer can choose one method for production. Method 1 is preferred because its structure has a better labor-saving effect.

[0045] The dewatering roller 11 is a long roller. The long rollers on both sides squeeze the cotton wool, and a complete and continuous long roller squeezes water from the sides of the cotton wool, minimizing damage to the cotton wool surface and ensuring continuous dewatering. Connectors 111 are provided on both sides of the long roller, and the connectors 111 are inserted into the ends of the long roller. The exposed section of the connector has a raised edge 112. The housing 1 has mounting holes 13 that fit the raised edges 112. The long roller is rotatably mounted on the housing 1 via the connectors 111. This structure facilitates assembly by the manufacturer. Workers first place two connectors 111 at both ends of the long roller 11, then insert the raised edge of one connector into one mounting hole, and then apply external force to make the raised edge of the other connector engage in the other mounting hole. Preferably, the long roller 11 is made of a hollow metal tube or a hollow plastic tube; the metal can be made of stainless steel, stainless iron, aluminum, etc.

[0046] The driven member 92 is provided with several mounting positions 922 along the direction of movement of the housing. The support member 91 of the rubber cotton is fixed on different mounting positions 922 to control the distance between the rubber cotton 9 and the housing 1. Since the rubber cotton may deform due to long-term squeezing, the mounting positions 922 are provided to allow the rubber cotton to rest against the side of the squeezing roller under normal use, preventing the rubber cotton 9 from twisting and making the user more comfortable when mopping the floor. The user can remove the rubber cotton and then adjust and fix it in different mounting positions.

[0047] The width of the inner cavity of the housing is greater than the width between the two squeezing rollers; the inner cavity of the housing is provided with a number of longitudinal guide ribs 101. The longitudinal guide ribs 101 compensate for the gap between the inner cavity of the housing 10 and the extruder, and also reduce the frictional resistance between the inner cavity and the cotton, which is beneficial for the user to push the cotton out of the housing.

[0048] The upper end of the housing is provided with an inner groove. When the telescopic rod assembly is retracted, it is hidden in the inner groove. This structure protects the telescopic rod assembly. During the mopping process, the telescopic rod assembly is not exposed and will not be subject to external impact, making it less prone to damage, and also ensuring the aesthetics of the product.

[0049] The housing 1 is provided with a slanted groove 19 or an arc-shaped groove, and one end of the telescopic rod assembly is limited in the slanted groove 19 or the arc-shaped groove. During the movement of the sliding sleeve 7, in order to ensure that the moving direction of the driven member 92 is fixed, the connection position between the end of the telescopic rod assembly and the housing will move relative to each other. By providing the slanted groove 19 or the arc-shaped groove to limit the end of the telescopic rod assembly, the movement of the telescopic rod assembly is ensured to be stable. In addition, a roller 24 is hinged to the end of the telescopic rod assembly, and the roller's pivot 241 is limited in the slanted groove 19 or the arc-shaped groove. The roller 24 reduces the moving resistance of the telescopic rod assembly, making it easier for the user. The housing 1 is provided with a slanted surface 121 or an arc-shaped surface adapted to the roller 24. During the extension or retraction of the telescopic rod assembly, the roller 24 rests on the slanted surface 121 or the arc-shaped surface, which provides effective support for the moving roller 24.

[0050] A latch 23 is slidably mounted on the telescopic rod assembly, and a hook 921 is mounted on the driven member 92. An elastic element acts on the latch 23, causing the latch 23 to engage with the hook 921. When the latch 23 is unlocked, the latch engagement part 231 and the hook 921 separate, and the adhesive cotton 9 can be removed from the telescopic rod assembly.

[0051] To ensure the driven member and the latch engage immediately upon the insertion of the adhesive into the housing, the following structures are provided: Structure 1: The upper end of the housing has an opening 103 for the driven member to pass through. A guide rib 102 is provided on the side of the opening 103. Through the guide rib 102, the driven member 92 can move directly out of the opening and engage with the latch. Structure 2: The driven member has a protrusion 923 at the opening on the side of the latch. The driven member 91 moves towards the latch, and the latch engagement part 231 first moves against the guide surface 924 of the latch, then abuts against the protrusion 923, and finally enters the latch 921 under the action of the elastic element. The protrusion 923 provides a limiting position, allowing the latch engagement part 231 to abut against the protrusion and then enter the latch 921 under the action of the elastic element. With the above structure, the user only needs to align the cotton 9 with the opening of the housing and then push the driven part 92 into the housing 1. Once it is pushed in place, the assembly is complete. To unlock, simply press the latch 23 located on the telescopic rod assembly.

[0052] After the rubber cotton is pulled into the inner cavity of the housing, part of the rubber cotton deforms within the inner cavity and part deforms at the dewatering roller position. The rubber cotton remains partially exposed, which facilitates its ejection. Of course, the rubber cotton can also be completely inserted into the housing, but the preferred method is to leave part of the rubber cotton exposed throughout.

[0053] The elastic components mentioned above can be common elastic parts such as springs 29 and soft rubber.

[0054] The above embodiments are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A sponge mop that saves effort in wringing out water, characterized in that: The device includes a handle, a housing, and a rubber sizing agent. The handle and the housing are fixed or hinged together. Squeezing rollers are provided on both sides of the opening of the housing, forming a first squeezing position between the rollers. The inner cavity of the housing is a second squeezing position, and the rubber sizing agent is deformably placed within the inner cavity of the housing. A pulling device is provided on the handle, which drives the rubber sizing agent to move. The rubber sizing agent first passes through the first squeezing position for squeezing, and then enters the second squeezing position for overall deformation and squeezing. The side of the PVC foam is provided with a support member, which keeps the PVC foam in a long strip shape during the squeezing and use processes. The pulling device includes a sliding sleeve and a pull rod. The sliding sleeve is fitted onto the handle. Pull rods are provided on both sides of the sliding sleeve and the housing. One end of the pull rod is connected to the sliding sleeve and the other end is connected to the housing. A driven member is fixedly provided on the support of the rubber cotton, and the driven member is connected to the middle of the pull rod. Pulling the sliding sleeve away from the rubber cotton causes the pull rod to move and drive the rubber cotton into the housing. Pushing the sliding sleeve closer to the rubber cotton causes the pull rod to move and push the rubber cotton away from the housing.

2. The labor-saving, water-squeezing sponge mop according to claim 1, characterized in that: The driven member has several mounting positions along the direction of movement of the housing, and the support member of the rubber cotton is fixed at different mounting positions to control the distance between the rubber cotton and the housing.

3. The labor-saving, water-squeezing sponge mop according to claim 1 or 2, characterized in that: The dewatering roller is a long roller, with long rollers on both sides squeezing the cotton; the long rollers are provided with sleeves on both sides, the sleeves are inserted into the ends of the long rollers, the exposed section of the sleeves is provided with a protrusion, the housing is provided with mounting holes adapted to the protrusion, and the long rollers are rotatably mounted on the housing through the sleeves.

4. The labor-saving, water-squeezing sponge mop according to claim 1 or 2, characterized in that: The width of the inner cavity of the shell is greater than the width between the two squeezing rollers; the inner cavity of the shell is provided with several longitudinal guide ribs.

5. The labor-saving, water-squeezing sponge mop according to claim 1 or 2, characterized in that: The upper end of the housing is provided with an inner groove, and the pull rod can be hidden in the inner groove; the housing is provided with a slanted groove or an arc-shaped groove, and one end of the pull rod is limited on the slanted groove or arc-shaped groove.

6. The labor-saving, water-squeezing sponge mop according to claim 5, characterized in that: The end of the pull rod is hinged to a roller, and the roller's axis of rotation is limited on the inclined groove or arc groove; the housing is provided with an inclined surface or arc surface that matches the roller, and the roller rests on the inclined surface or arc surface during the movement of the pull rod.

7. The labor-saving, water-squeezing sponge mop according to claim 1, 2, or 6, characterized in that: The pull rod is a telescopic rod assembly, which includes a first rod and a second rod that are nested together, and the first rod and the second rod cannot be completely separated; or, the pull rod is an independent connecting rod, one end of which is connected to the inclined groove of the housing, and the other end of which is provided with a sliding groove, with the sliding sleeve connecting shaft limited within the sliding groove; A latch is slidably mounted on the pull rod, and a hook is mounted on the driven member. An elastic element acts on the latch, causing the latch to engage with the hook. When the latch is unlocked, the latch and the hook separate, and the adhesive can be removed from the pull rod.

8. The labor-saving, water-squeezing sponge mop according to claim 7, characterized in that: The driven member has a protrusion at the opening on the side of the hook; the driven member moves toward the locking side, the locking part first moves against the guide surface of the hook, then abuts against the protrusion, and finally enters the hook under the action of the elastic member.

9. The labor-saving, water-squeezing sponge mop according to claim 7, characterized in that: The upper end of the housing has an opening for the driven member to pass through, and guide ribs are provided on the side of the opening, so that the driven member can be moved out of the housing opening by relying on the guide ribs.

10. The labor-saving, water-squeezing sponge mop according to claim 1, 2, 6, 8, or 9, characterized in that: After the rubber cotton is pulled into the inner cavity of the shell, part of the rubber cotton deforms in the inner cavity of the shell, and part of the rubber cotton deforms at the position of the squeezing roller.