CN216984750U - Mop head and floor washing machine - Google Patents

Abstract

The utility model provides a drag head and floor cleaning machine, should drag the head and include casing, shovel strip and lifting piece all are connected with the casing, and the casing includes the bottom surface, drags the head during operation, and the bottom surface is towards ground, and shovel strip and lifting piece all stretch out from the bottom surface. The lifting piece comprises a convex arc surface, the mop head moves along a first direction during working, and the convex arc surface and the shovel strip are sequentially arranged along the first direction. The bottom surface is used as a reference, the height of the top end, extending out from the bottom surface, of the shovel strip is a first height, the height of the top end, extending out from the bottom surface, of the lifting piece is a second height, and the first height is larger than or equal to the second height. When the mop head moves on the ground during working and meets an obstacle, the convex arc surface contacts the obstacle earlier than the shovel strip. A floor washing machine comprises a mop head and a handle, wherein the handle is connected with the mop head. The application provides a floor cleaning machine is through setting up the lifting piece, at the in-process of floor cleaning machine work, the convex arc face of lifting piece can be prior to shovel strip contact barrier, one section height of help floor cleaning machine lifting for the obstacle can be crossed to the shovel strip.

Description

Mop head and floor washing machine

Technical Field

The application relates to the field of cleaning equipment, in particular to a mopping head and a floor washing machine with the mopping head.

Background

The floor cleaning machine can bring great convenience into play in household cleaning, and the shoveling strips in the floor cleaning machine are close to the ground to advance, so that the ground garbage can be effectively shoveled. However, in daily use, when some ground obstacles collide with the shovel strip, the work of the floor washing machine is seriously influenced, and even the shovel strip and the floor washing machine are damaged.

SUMMERY OF THE UTILITY MODEL

The purpose of this application is to make floor cleaning machine have certain obstacle-surmounting ability in the work to protect the inner structure of floor cleaning machine.

In a first aspect, the present application provides a mop head comprising a housing, a shovel bar, and a lifting member; the shovel strip and the lifting piece are both connected with the shell, the shell comprises a bottom surface, when the mop head works, the bottom surface faces the ground, and the shovel strip and the lifting piece both extend out of the bottom surface; the lifting piece comprises a convex cambered surface, the mop head moves along a first direction when working, and the convex cambered surface and the shovel strips are sequentially arranged along the first direction; taking the bottom surface as a reference, the height of the top end, extending out of the bottom surface, of the shovel strip is a first height, the height of the top end, extending out of the bottom surface, of the lifting piece is a second height, and the first height is larger than or equal to the second height; when the mop head moves on the ground during working, and when the mop head meets an obstacle, the convex arc surface contacts the obstacle earlier than the shovel strip.

The lifting piece is a spring plate, one end of the spring plate is fixedly connected with the shell, and the other end of the spring plate moves relative to the shell; the elastic sheet can generate elastic deformation.

The shell piece comprises a shell and a spring piece, wherein the spring piece comprises a first section and a second section, one end of the first section is fixedly connected with the shell, and the other end of the first section is fixedly connected with the second section; the second section extends out of the bottom surface, the surface of the second section back to the shovel strip is a convex cambered surface, and the second section moves relative to the shell.

The second section comprises a front section and a rear section, and in the first direction, the front section is positioned on one side away from the shovel strip, and the rear section is positioned on one side close to the shovel strip; one end of the front section is fixedly connected with the first section, and the other end of the front section is fixedly connected with the rear section; the surface of the front section back to the shovel strip is a convex cambered surface.

The shell is provided with a first limiting surface, and when the mop head works, the first limiting surface is higher than the bottom surface by taking the ground as a reference; the elastic sheet also comprises a third section which is fixedly connected with one end of the second section far away from the first section; when the second section is elastically deformed, the third section moves relative to the shell, and the third section contacts with the first limiting surface when moving to a limit distance.

Wherein, the shell is provided with a movable groove; when the mop head works, the ground is taken as a reference, the upper wall surface of the movable groove is a first limiting surface, and the lower wall surface of the movable groove is a second limiting surface; the second limiting surface is positioned between the first limiting surface and the bottom surface; the third section is positioned in the movable groove and moves between the first limiting surface and the second limiting surface.

The third section is provided with a bulge, and the bulge protrudes towards the first limiting surface.

Wherein, the end part of the third section far away from the second section is in a hook shape; the movable groove also comprises a side wall, the side wall is connected with the first limiting surface and the second limiting surface, and when the third section moves in the movable groove, the hook-shaped end part of the third section, which is far away from the second section, moves to a limit distance and then is contacted with the side wall.

The lifting piece is a boss, the boss is connected with the shell and is of a rigid structure, and the shape of the boss is kept unchanged when the boss is in contact with an obstacle.

In a second aspect, the present application further provides a floor washing machine comprising a handle and the mop head of any of the embodiments of the first aspect, the handle being connected to the mop head.

The application provides a floor cleaning machine passes through the lifting piece, and at the in-process of floor cleaning machine work, the convex arc face of lifting piece can be prior to shovel strip contact barrier, one section height of help floor cleaning machine lifting for the barrier can be crossed to the floor cleaning machine. Simultaneously, the bottom end of the lifting piece is equal to or higher than the bottom end of the shovel strip, so that the lifting piece cannot contact the ground all the time, and the ground is prevented from being damaged.

Drawings

To more clearly illustrate the structural features and effects of the present application, a detailed description is given below in conjunction with the accompanying drawings and specific embodiments.

FIG. 1 is a schematic view of a blade bar in failure;

FIG. 2 is a schematic view of a floor scrubber according to one embodiment;

FIG. 3 is a schematic view of a portion of the structure of FIG. 2;

FIG. 4 is a schematic sectional view taken along line A-A in FIG. 3;

FIG. 5 is a partial enlarged schematic view of FIG. 4 at A;

FIG. 6 is a schematic structural diagram of the spring plate in FIG. 5;

FIG. 7 is a schematic structural diagram of the spring plate in FIG. 5;

FIG. 8 is a schematic view of a portion of a scrubber according to another embodiment.

Description of reference numerals:

100-a floor scrubber;

10-a mop head, 1-an installation block, 11-a first step, 12-a second step, 2-a fixing piece, 3-a shovel strip, 3 a-a root, 3b tip, 4-a spring piece, 41-a first section, 41 a-an installation hole, 42-a second section, 421-a front section, 422-a rear section, 43-a third section, 431-a bulge, 5-a fixing piece, 6-a shell, 61-a bottom surface, 7-a movable groove, 8-a boss and 9-an accommodating space;

20-handle.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings of the embodiments of the present application. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. All other embodiments that can be derived by a person skilled in the art from the embodiments given herein without making any creative effort shall fall within the protection scope of the present application.

The embodiment of the application provides a floor scrubber 100, which can not only clean a flat ground, but also clean an obstacle on an uneven ground, thereby being suitable for various ground environments.

The floor cleaning machine of the embodiment of the application comprises a handle and a mop head. One end of the handle is connected with the mop head. The mop head comprises a shovel strip and a rolling brush, a gap is formed between the shovel strip and the rolling brush, and the rolling brush contacts the uncleaned ground before the shovel strip in the moving direction.

The working principle of the floor washing machine provided by the embodiment of the application is as follows: the user drags the head through handle control and removes and clean, uses the floor cleaning machine in-process of marcing, and the round brush is rotatory, rolls up the rubbish on ground, brings the inside of floor cleaning machine through the round brush and the clearance of shovel between the strip, and the shovel strip is hugged closely ground forward all the time to when guaranteeing to shovel rubbish, prevent that the rubbish that the round brush rolled up from leaking. Meanwhile, the part of the shovel strip contacting the ground is of a flexible structure, so that the shovel strip can be bent and deformed when meeting a small obstacle and then returns to deform after crossing the obstacle, and therefore, the floor washing machine can have certain obstacle crossing capability.

However, when the floor cleaning machine actually moves, a large obstacle may be encountered, for example, due to uneven connection of adjacent floor tiles, a large height difference between the floor tiles is caused, and a step surface between the floor tiles is formed. As shown in fig. 1, the V direction shown in the figure is the movement direction of the floor cleaning machine, and in the movement process, the shovel bars can collide with the step surface, the step surface with a larger height exceeds the deformation obstacle crossing capability of the shovel bars, so that the movement of the floor cleaning machine is hindered, and the shovel bars and the floor cleaning machine are possibly damaged.

As shown in FIG. 2, the floor washing machine 100 of the present embodiment includes a handle 20 and a mop head 10. One end of the handle 20 is connected to the mop head 10.

As shown in fig. 3, 4 and 5, the mop head 10 includes a housing 6, a mounting block 1, a shovel strip 3, a spring plate 4, a rolling brush, a fixing member 2 and a fixing member 5.

As shown in fig. 3, 4 and 5, the housing 6 is a casing of the mop head 10, and the housing 6 encloses an inner space formed to accommodate a part of the elements of the mop head 10. As shown in fig. 3 and 4, when the floor washing machine works, one side of the casing 6 close to the ground is a bottom surface 61, and the bottom surface 61 is spaced from the ground.

As shown in fig. 5, the mounting block 1 is a stepped block structure, the mounting block 1 has a first step 11 and a second step 12, the height of the first step 11 is greater than that of the second step 12, and the first step 11 has a mounting hole 41a for the fixing member 2 to pass through, so that the mounting block 1 and the housing 6 are fixedly mounted.

In this embodiment, the lifting member is a spring plate 4. As shown in fig. 6 and 7, the elastic sheet 4 includes a first section 41, a second section 42 and a third section 43, and the first section 41, the second section 42 and the third section 43 are connected in sequence, for example, may be connected as a whole. The spring plate 4 can be elastically deformed.

As shown in fig. 6 and 7, the first segment 41 has an approximately rectangular plate-like structure, and extends in an approximately horizontal direction as shown in fig. 7. The first section 41 has a mounting hole 41a for the fixing member 5 to pass through, so that the elastic sheet 4 and the housing 6 form a detachable fixed connection. The second section 42 includes a front section 421 and a rear section 422, which are connected, e.g., may be integral. The front section 421 is connected to the first section 41. The front section 421 has a convex arc surface, which may have an arc angle greater than or equal to 90 °. The rear section 422 is approximately a rectangular plate-like structure. The outer surface of the junction between the front section 421 and the rear section 422 is a smooth outer surface, so that the shapes of the front section 421 and the rear section 422 are smooth. The third section 43 and one end of the rear section 422 far from the first section 41 are fixedly connected in a bending manner, and may be connected as a whole. The third section 43 is connected to the rear section 422 and has an included angle, which may be an obtuse angle. The middle of the third section 43 has a protrusion 431, and the protrusion 431 may have a circular arc structure, for example. In the orientation shown in fig. 7, the projection 431 is projected in a direction substantially opposite to the projection of the front section 421. The end of the third section 43 away from the second section 42 is in the shape of a hook, and the bending direction of the hook is approximately the same as the protruding direction of the protrusion 431.

As shown in fig. 5, the fixing member 2 is used to detachably fix the mounting block 1 to the housing 6. The fixing piece 5 is used for enabling the elastic sheet 4 to be detachably and fixedly connected with the shell 6. In this embodiment, the fixing elements 2 and 5 are screws, and in other embodiments, the fixing elements 2 and 5 are not limited to screws, and other types of fixing elements 2 and 5 may be used to fixedly connect the mounting block 1 and the elastic sheet 4 to the housing 6, respectively.

As shown in fig. 4 and 5, the blade 3 has a root portion 3a and a tip portion 3b, and the root portion 3a is fixedly connected to the tip portion 3 b. The root 3a of the blade 3 is fixedly connected to the housing 6, and the tip 3b is fixedly connected to the root 3a on a side of the root 3a away from the bottom surface 61. The tip 3b may be made of a flexible material capable of elastic deformation, and the flexible material may be rubber, for example. The side of the tip 3b away from the bottom surface 61 has a groove, for example, a "V" groove, so that the tip 3b can be bent at the groove when being stressed.

The mop head 10 further comprises a roller brush (not shown) which is arranged in the accommodating space 9 shown in fig. 5 and can rotate around the axial direction of the roller brush. The direction of the rotational movement of the roller brush is clockwise in fig. 5.

As shown in fig. 4 and 5, the scrubber 100 is moved in a first direction (the V direction in fig. 4) during operation, with the bottom surface 61 of the housing 6 facing the ground. The round brush sets gradually along the first direction with shovel strip 3 for the round brush is prior to shovel strip 3 contact unclean ground. The roller brush is fixedly mounted with the housing 6, at least a portion of the roller brush extending from the bottom surface 61. The root 3a of the blade 3 is fixedly attached to the housing 6, and at least a portion of the tip 3b of the blade 3 extends from the bottom surface 61. A gap is reserved between the shovel strip 3 and the rolling brush.

As shown in fig. 4 and 5, the elastic sheet 4 is located between the rolling brush and the shovel bar 3 in the first direction, so that the rolling brush, the elastic sheet 4 and the shovel bar 3 are sequentially arranged along the first direction. At least one spring plate 4 is distributed on two axial sides of the rolling brush. The elastic sheets 4 and the shovel strips 3 have a certain distance in the axial direction of the rolling brush, so that the shovel strips 3 are positioned between the two elastic sheets 4. In this embodiment, the sequential arrangement of the components does not mean that all regions of one component are located on one side of another component, or that the two components may have overlapping regions in the first direction. The fixing member 5 penetrates through the mounting hole 41a of the first section 41 to be fixedly connected with the housing 6, so that one end of the elastic sheet 4 is fixedly connected with the housing 6, and the other end of the elastic sheet 4 can move relative to the housing 6. At least a part of the convex arc surface of the front segment 421 of the second segment 42 is located on the side facing away from the shovel 3 in the first direction, for example, the second segment 42 is entirely located on the side facing away from the shovel 3, so that the bottom end of the elastic piece 4 (i.e., the end of the elastic piece 4 closest to the ground in the cross-sectional view 5) is spaced from the tip 3 b. Illustratively, the spacing is in the range of 1mm to 2 mm. The height of the top end of the shovel strip 3 extending from the bottom surface 61 is a first height by taking the bottom surface 61 as a reference, the height of the top end of the elastic sheet 4 extending from the bottom surface 61 is a second height, and the first height is larger than or equal to the second height.

As shown in fig. 4 and 5, the fixing member 2 is fixedly connected to the housing 6 through the mounting hole 41a of the first step 11 of the mounting block 1, so that the mounting block 1 is fixedly mounted to the housing 6. The mounting block 1 and the housing 6 enclose a movable slot 7. When the floor washing machine 100 works, the ground is used as a reference, the upper wall surface of the movable groove 7 is a first limiting surface, the first limiting surface is higher than the bottom surface 61, the lower wall surface of the movable groove 7 is a second limiting surface, and the height of the second limiting surface is between the first limiting surface and the bottom surface 61. The wall surface of the movable groove 7 far away from one side of the rolling brush is a side wall, and the side wall is connected with the first limiting surface and the second limiting surface and forms an included angle with the first limiting surface and the second limiting surface. The movable slot 7 receives the third section 43 of the elastic sheet 4, and the protrusion direction of the protrusion 431 of the third section 43 faces the first limiting surface. In this embodiment, the movable groove 7 is formed by surrounding the mounting block 1 and the housing 6, but in other embodiments, the movable groove 7 may be formed directly in the housing 6.

In this application embodiment, 4 fixed mounting's of shell fragment one end is located the one side that is close to the round brush, and in other embodiments, 4 fixed mounting's of shell fragment one end also can be located the one side that is close to shovel strip 3, only need guarantee that the convex arc face of second section 42 is located the one side that deviates from shovel strip 3, can be prior to shovel strip 3 contact barrier can.

Therefore, the working principle that the elastic sheet 4 helps to cross the obstacle is as follows: as shown in fig. 1, 2, 4, and 5, the floor cleaning machine 100 moves along a first direction (the V direction shown in fig. 4), when encountering a step surface, the convex arc surface of the second section 42 of the elastic sheet 4 contacts an obstacle (i.e., the step surface) first, the floor cleaning machine 100 moves forward continuously, each part of the convex arc surface of the second section 42 slides and contacts the obstacle in sequence, the elastic sheet 4 is elastically deformed by the force, and the third section 43 of the elastic sheet 4 moves in the movable groove 7 along the direction close to the fixed member 2 and is lifted upwards. In some cases, the elastic sheet 4 contacts the obstacle, the elastic sheet 4 elastically deforms, the third section 43 does not contact the first limiting surface in the movable slot 7, and the elastic sheet 4 supports the floor cleaning machine 100 to lift upwards to assist the floor cleaning machine 100 to cross the obstacle. In other cases, the elastic sheet 4 contacts the obstacle, the elastic sheet 4 is elastically deformed under the stress, so that when the third section 43 moves to the limit position, the hook structure of the third section 43 contacts the side wall in the movable groove 7, the protrusion 431 of the third section 43 contacts the first limit surface of the movable groove 7, the two ends of the elastic sheet 4 support the mop head 10, and an upward acting force is applied to the mop head 10 to lift the floor washing machine 100, so that the height difference between the shovel strip 3 and the obstacle is reduced to assist in obstacle crossing. If the height difference between the blade bar 3 and the obstacle after the reduction is 0, the floor cleaning machine 100 can smoothly pass over the obstacle. If after the floor cleaning machine 100 is lifted, the shovel strip 3 and the obstacle still have a smaller height difference, at this time, because the tip portion 3b of the shovel strip 3 is a flexible material, and one side of the shovel strip 3 is provided with a groove, the shovel strip 3 can be helped to adapt to the smaller height difference, and the shovel strip 3 can be elastically deformed and bent enough to touch the obstacle with the smaller height, so that the shovel strip 3 smoothly passes through the obstacle. Therefore, the elastic sheet 4 can help the floor cleaning machine 100 to cross the obstacle, prevent the shovel strip 3 from directly impacting the obstacle, and protect the shovel strip 3 and the floor cleaning machine 100.

In other embodiments, as shown in fig. 8, the lifting member may also be a boss 8 to assist the scrubber 100 in clearing obstacles. The boss 8 is a rigid structure, and the boss 8 is fixedly connected with the housing 6, for example, may be connected as a whole. The structure of the boss 8 may be, for example, a semi-spherical shape or a fan shape whose surface is a convex arc surface. At least a part of the convex arc surface of the boss 8 is located on the side facing away from the blade bar 3, for example, the entire area of the boss 8 is located on the side facing away from the blade bar. So that the bottom end of the boss 8 (i.e. the end of the boss 8 closest to the ground in figure 8) is spaced from the tip 3 b. Illustratively, the spacing is in the range of 1mm to 2 mm. The height of the top end of the shovel strip 3 extending from the bottom surface 61 is a first height, the height of the top end of the boss 8 extending from the bottom surface 61 is a second height, and the first height is larger than or equal to the second height. The effect of boss 8 is similar to the effect of shell fragment 4, and when the floor cleaning machine 100 meets the barrier, boss 8 can contact the barrier earlier than shovel strip 3, and help floor cleaning machine 100 lifts a take the altitude, and help floor cleaning machine 100 cross the barrier smoothly.

The elastic sheet 4 and the boss 8 are both lifting pieces, the elastic sheet 4 and the boss 8 are different in position, the elastic sheet 4 can elastically deform and is in elastic contact with a barrier, and a certain buffering effect can be achieved, so that the floor cleaning machine is protected. While the boss 8 is in rigid contact and lacks a shock absorbing effect, the spring plate 4 is a preferred embodiment of the lifting member.

In the embodiment of the application, shell fragment 4 or boss 8 all are the lifting piece, and the obstacle crossing function of lifting piece mainly relies on the convex cambered surface that deviates from one side of shovel strip 3, and this convex cambered surface can make smooth the sliding when shell fragment 4 or boss 8 contact the barrier to lifting floor cleaning machine 100, and curved outline can make shell fragment 4 or boss 8 do not have the dead point at the in-process that slides, can be smooth cross the barrier. The outer contour of the elastic sheet 4 or the boss 8 for helping the obstacle crossing is not limited to the circular arc profile, and in other embodiments, the surface of the elastic sheet 4 or the boss 8 which is firstly contacted with the obstacle may also be a slope surface or other surface shape which can help the floor cleaning machine 100 to be smoothly lifted.

In the embodiment of the application, the bottom ends of the elastic pieces 4 or the bosses 8 are spaced from the ground to a certain extent, so that the elastic pieces 4 or the bosses 8 can be prevented from frequently contacting the ground when the floor washing machine 100 moves, and the ground is prevented from being damaged. Therefore, when the elastic sheet 4 or the boss 8 has a distance with the ground, the ground can be protected, and the auxiliary obstacle crossing function of the lifting floor washing machine 100 can be achieved.

In the embodiment of the present application, the third section 43 of the elastic sheet 4 moves in the movable slot 7. If the end of the third section 43 away from the second section 42 is a square head, the moving slot 7 may be matched with the included angle formed between the side wall and the second limiting surface when moving, so that the elastic sheet 4 is locked and cannot be lifted upwards. Therefore, the third section 43 is provided with a hook structure, when contacting the side wall of the movable groove 7, the third section 43 can have a tendency of lifting upwards, and the elastic sheet 4 is prevented from being locked with the movable groove 7. Similarly, the third section 43 is further provided with a protrusion 431, and the protrusion 431 contacts the first limiting surface before other parts of the third section 43, so that one end of the third section 43, which is far away from the second section 42, is prevented from contacting and being clamped at an included angle formed by the side wall and the first limiting surface, and the normal work of the elastic sheet 4 is ensured. Meanwhile, the bulge 431 of the third section 43 is in line contact with the upper wall of the movable groove 7, and the pressure of the line contact part is larger when the floor cleaning machine 100 is lifted, so that the bulge 431 of the third section 43 is prevented from being designed into a convex sharp-angled structure and a smooth circular-arc structure, and the damage to the floor cleaning machine 100 caused by the overlarge stress of the elastic sheet 4 is prevented.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (10)

1. A mop head is characterized in that a mop head is provided,

comprises a shell, a shovel strip and a lifting piece;

the shovel strip and the lifting piece are both connected with the shell, the shell comprises a bottom surface, when the mop head works, the bottom surface faces the ground, and the shovel strip and the lifting piece both extend out of the bottom surface;

the lifting piece comprises a convex cambered surface, the mop head moves along a first direction when working, and the convex cambered surface and the shovel strips are sequentially arranged along the first direction; taking the bottom surface as a reference, the height of the top end of the shovel strip extending out of the bottom surface is a first height, the height of the top end of the lifting piece extending out of the bottom surface is a second height, and the first height is greater than or equal to the second height;

when the mop head runs into an obstacle, the convex arc surface contacts the obstacle before the shovel strip.

2. The mop head according to claim 1,

the lifting piece is an elastic piece, one end of the elastic piece is fixedly connected with the shell, and the other end of the elastic piece moves relative to the shell; the elastic sheet can generate elastic deformation.

3. The mop head according to claim 2,

the elastic sheet comprises a first section and a second section, one end of the first section is fixedly connected with the shell, and the other end of the first section is fixedly connected with the second section; the second section is from the bottom surface stretches out, the second section dorsad the surface of shovel strip be the convex arc face, the second section is relative the casing activity.

4. The mop head according to claim 3,

the second section comprises a front section and a rear section, the front section is positioned on one side departing from the shovel strip in the first direction, and the rear section is positioned on one side close to the shovel strip; the surface of the front section back to the shovel strip is the convex cambered surface.

5. The mop head of claim 3,

the shell is provided with a first limiting surface, and when the mop head works, the first limiting surface is higher than the bottom surface by taking the ground as a reference;

the elastic sheet also comprises a third section, and the third section is fixedly connected with one end of the second section, which is far away from the first section;

when the second section is elastically deformed, the third section moves relative to the shell, and the third section contacts with the first limiting surface when moving to a limit distance.

6. The mop head according to claim 5,

the shell is provided with a movable groove; when the mop head works, the ground is taken as a reference, the upper wall surface of the movable groove is the first limiting surface, and the lower wall surface of the movable groove is the second limiting surface; the second limiting surface is positioned between the first limiting surface and the bottom surface;

the third section is located in the movable groove, and the third section moves between the first limiting surface and the second limiting surface.

7. The mop head according to claim 6,

the third section is provided with a bulge, and the bulge protrudes towards the first limiting surface.

8. The mop head according to claim 6,

the end part of the third section, which is far away from the second section, is in a hook shape; the movable groove further comprises a side wall, the side wall is connected with the first limiting surface and the second limiting surface, and when the third section moves in the movable groove, the hook-shaped end part, far away from the second section, of the third section moves to a limit distance and is in contact with the side wall.

9. The mop head according to claim 1,

the lifting piece is a boss, the boss is connected with the shell, the boss is of a rigid structure, and the shape of the boss is kept unchanged when the boss contacts with the barrier.

10. A floor washing machine is characterized in that,

a mop head according to any of claims 1 to 9 and including a handle, the handle being attached to the mop head.

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