CN215959588U - Scraper and scraper assembly - Google Patents

Abstract

The application provides a scraper and a scraper assembly, wherein the scraper assembly comprises two scrapers; the scraper comprises a wiping wall and at least two suction structures, and the suction structures are used for attracting the scraper with other scrapers through magnetic force with an object to be cleaned; the outer surface of the wiping wall comprises a wiping surface; the wiping surface is provided with a wiping material, the wiping material is arranged to cover the central area of the wiping surface or deviate from the central area of the wiping surface, and the suction structures are distributed on the periphery of the wiping material. This application is optimized through the position to wiper and actuation structure and is improved, can make the dynamics of cleaning of wiper concentrate, improves the effect of cleaning of scraper.

Description

Scraper and scraper assembly

Technical Field

The application relates to the technical field of daily cleaning supplies, in particular to a scraper and a scraper assembly.

Background

The glass window is influenced by the internal and external environments for a long time, impurities such as dust and the like can be accumulated on the surface of the glass window, the attractiveness of the glass window is influenced, and meanwhile, indoor light transmission is not facilitated, so that the glass needs to be cleaned frequently. The magnetic glass wiper provides great convenience for cleaning glass windows, two mutually attracted wiper bodies are respectively attached to the inner surface and the outer surface of the glass, when the magnetic glass wiper is used, a user drives the outer wiper body positioned on the outer surface of the glass to move together by pushing the inner wiper body positioned on the inner surface of the glass, the purpose of simultaneously cleaning the inner surface and the outer surface of the glass window is achieved, and the magnetic glass wiper has high cleaning efficiency and safety performance.

The magnetic glass wiper is characterized in that magnets are uniformly distributed in the inner wiper body and the outer wiper body, the inner wiper body and the outer wiper body are mutually attracted by the magnets and respectively attached to the inner surface and the outer surface of the glass, and the inner surface and the outer surface of the glass are wiped by wiping cloth on the inner wiper body and the outer wiper body. The magnet of the existing magnetic glass wiper is positioned in the middle of the inner and outer wiper bodies, and the wiper cloth is positioned at two ends of the inner and outer wiper bodies, so that the wiping force of the inner and outer wiper bodies is insufficient, and the wiping effect is poor. In addition, if the water outlet device is required to be equipped, two water outlet devices are required to be arranged corresponding to the wiping cloths at the two ends due to the arrangement of the magnet, and the cost is high.

SUMMERY OF THE UTILITY MODEL

The application provides a scraper and scraper subassembly to the body is wiped in the interior wiping body that exists among the solution prior art and the body is wiped outward and the dynamics of wiping is not concentrated and results in wiping the poor technical problem of effect.

In order to solve the above problems, the embodiment of the present application provides a technical solution that: a scraper comprises a wiping wall and at least two suction structures, wherein the suction structures are used for sucking the scraper with other scrapers through magnetic force by separating an object to be cleaned; the outer surface of the wiping wall comprises a wiping surface;

the wiping surface is provided with a wiping material, the wiping material is arranged to cover the central area of the wiping surface or deviate from the central area of the wiping surface, and the attraction structures are distributed on the periphery of the wiping material.

According to the scraper provided by the embodiment of the application, the wiping material is arranged to cover the central area of the wiping surface or deviate from the central area of the wiping surface, and the suction structures are distributed on the periphery of the wiping material, when the scraper is used for wiping an object to be cleaned, at least one part of the peripheral edge of the scraper is sucked and positioned through the suction structures, then the object to be cleaned is wiped through the wiping material, namely, the wiping work is carried out through the central area of the wiping wall or the area outside the central area and inside the suction structures, so that the wiping force of the wiping material is concentrated, and the wiping effect is good; simultaneously, in the use, the wiper after soaking receives glass and wipes the extrusion of wall and can extrude the water stain, because the wiper locates the central zone or the central zone outside and the region within each actuation structure, the water stain that then extrudes can not flow out the scraper outside, but stays inside the scraper, and the scraping strip of being convenient for scrapes the water stain totally, can not leave the water stain. In addition, through the suction effect of distributing in the peripheral suction structure of wiper for treat the edge suction stability of the scraper of the inside and outside surface of cleaning object, and then make the dynamics of cleaning of wiper distribute evenly, clean the effect better.

In one possible design, the wipe is arranged to cover a central region of the wiping face and the centre line of the wipe is arranged offset from the centre line of the wiping face.

In one possible design, the wipe is arranged to cover a central region of the wiping face and the centre line of the wipe is arranged to coincide with the centre line of the wiping face.

In one possible design, the peripheral edges of the wipes are arranged to each be offset from the peripheral edge of the wiping face.

In one possible design, each of the engaging structures is circumferentially spaced around the periphery of the wipe.

In one possible design, the wipe is arranged to cover a middle section of the wiping surface in the direction of the length extension.

In a possible design, the number of the suction structures is two, and the two suction structures are symmetrically arranged on two opposite sides of the wiping object along the length extending direction of the wiping surface.

In one possible design, the wiper further comprises a water outlet for replenishing the wiper with water.

In one possible design, the water outlet device is provided with a water supply cavity and a water outlet, a water flow channel is arranged between the water outlet and the water supply cavity, and the water outlet is arranged on the wiping wall and is used for supplying water to the wiping object;

the water outlet device further comprises a valve core arranged on the water flow channel, and the valve core is configured to:

under the action of a first acting force, the valve core is displaced relative to the scraper, so that the valve core is opened, and a water flow channel between the water supply cavity and the water outlet is communicated;

under the action of second acting force borne by the valve core, the valve core is displaced relative to the scraper, so that a water flow channel between the water supply cavity and the water outlet is closed, the first acting force comprises inertia force and/or gravity, and the second acting force comprises inertia force and/or gravity.

In one possible design, when the first force and the second force are the same, the direction of displacement of the valve element relative to the wiper is different when the water flow channel is triggered to be closed and when the water flow channel is triggered to be opened.

In one possible design, the water flow passage comprises a valve cavity, a first end of the valve cavity is communicated with the water supply cavity, a second end of the valve cavity is communicated with the water outlet, and a second end of the valve cavity forms a necking; the valve core is movably arranged in the valve cavity and is configured to:

the valve core is far away from and opens the necking so as to lead a water flow channel between the water supply cavity and the water outlet to be communicated;

the valve core is close to and blocks the necking so that a water flow channel between the water supply cavity and the water outlet is closed.

In one possible design, a first end of the valve cavity is provided with a retainer for retaining the valve element within the valve cavity.

In one possible design, the water outlet device further comprises a water supply tank and a water outlet pipe, the water supply cavity is formed in the water supply tank, and the valve cavity is formed in the water outlet pipe;

one end of the water outlet pipe is communicated with the water supply tank, a positioning hole is formed in the wiper, and the other end of the water outlet pipe penetrates through the wiping wall and is arranged in the positioning hole in a penetrating mode.

In one possible embodiment, the wiper further comprises a wiper element which is arranged on one side of the wiper in the direction of the longitudinal extent of the wiping surface.

In one possible design, the scraper further comprises two scraping elements, and the two scraping elements are arranged along the length extension direction of the wiping surface and are respectively arranged on two sides of the wiping object.

In one possible design, the wiping wall is quadrilateral, and both ends of the wiper element protrude beyond the wiping wall.

In one possible design, two of the scrapers are configured to: the scrapers work alternately according to different wiping directions; the scraper also comprises a friction piece and a transmission assembly, and the friction piece is in transmission connection with the two scraping pieces through the transmission assembly; the friction member is configured to:

when the scraper scrapes the surface to be cleaned, the friction piece moves backwards relative to the scraper under the action of friction force between the friction piece and the surface to be cleaned, the transmission assembly drives the scraping piece positioned on the front side in the advancing direction to be away from the surface to be cleaned and does not work, and the transmission assembly drives the scraping piece positioned on the rear side in the advancing direction to be close to the surface to be cleaned so as to conduct scraping work.

In a possible design, the transmission assembly comprises an oscillating piece arranged on the wiping wall in an oscillating way, and the two scraping pieces are respectively and fixedly connected with two ends of the oscillating piece;

the swinging piece is in transmission connection with the friction piece, and the friction piece can drive the friction piece to swing when the scraper moves to scrape the surface to be cleaned, so that one end of the friction piece, which is positioned on the front side of the travelling direction, is far away from the surface to be cleaned, and one end of the friction piece, which is positioned on the rear side of the travelling direction, is close to the surface to be cleaned.

In one possible design, the transmission assembly further comprises a moving member, the friction member can drive the moving member to move backward relative to the scraper in the travel direction, and the moving member can drive the swinging member to swing.

In one possible design, the scraper further comprises a suction cup that can be sucked onto the surface to be cleaned.

In a second aspect, a scraper assembly is provided, which comprises a first scraper and a second scraper that are mutually attracted by an adsorption force, wherein at least one of the first scraper and the second scraper is the scraper.

According to the scraper assembly provided by the embodiment of the application, the scraper assembly is better in wiping effect by using the scraper.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

Fig. 1 is a schematic perspective view of a scraper provided in an embodiment of the present application;

FIG. 2 is a top view of a scraper provided in an embodiment of the present application;

FIG. 3 is a schematic longitudinal cross-sectional view of the scraper of FIG. 2;

FIG. 4 is a schematic view of a wipe and engagement structure according to other embodiments of the present application;

FIG. 5 is a schematic view of another arrangement of a wipe and engagement structure in other embodiments of the present application;

FIG. 6 is an exploded view of the scraper, friction member and drive assembly provided by the embodiments of the present application;

FIG. 7 is a cross-sectional view of the scraper of FIG. 2;

FIG. 8 is a schematic view of the pendulum of FIG. 6;

FIG. 9 is a schematic structural view of the moving member in FIG. 6;

FIG. 10 is a schematic assembled sectional view of the oscillating member and the moving member of FIG. 6;

fig. 11 is a schematic structural diagram of a scraper assembly according to an embodiment of the present application.

Reference numerals: 10. wiping the wall; 11. wiping the surface; 20. a wipe; 30. a suction structure; 40. a water outlet device; 41. a water supply tank; 411. a water supply cavity; 42. a water outlet pipe; 421. a valve cavity; 422. a water outlet; 43. a valve core; 44. a limiting member; 45. a sealing plug; 50. a scraping member; 60. a friction member; 70. a transmission assembly; 71. a swinging member; 711. a swing lever; 7111. a first mating surface; 712. a fixed seat; 72. a moving member; 721. a second mating surface; 722. a rib is protruded; 73. a guide rail; 74. a ball bearing; 75. a connecting member; 80. a suction cup; 90. a housing; 100. connecting blocks; 200. a first scraper; 300. a second scraper.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which 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.

In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise. In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description of the present application, it is to be understood that the terms "inner," "outer," "upper," "bottom," "front," "back," and the like, when used in the orientation or positional relationship indicated in FIG. 1, are used solely for the purpose of facilitating a description of the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present application.

It should be noted that the same reference numerals are used to denote the same components or parts in the embodiments of the present application, and for the same parts in the embodiments of the present application, only one of the parts or parts may be given the reference numeral, and it should be understood that the reference numerals are also applicable to the other same parts or parts.

In a first aspect, the embodiment of the present application first provides a wiper, and the wiping force of the wiper 20 to the glass is concentrated and the wiping effect is better by reasonably arranging the positions of the wiper 20 and each attraction structure 30. The scraper may be the glass scraper described above, and can be used to scrape and clean the glass surface. In addition, the scraper may also be used to scrape and clean the surface of other objects to be cleaned, such as a table top, a wall surface, a floor, a blackboard, and the like, and the present application is not limited thereto.

As shown in fig. 1 to 3, the wiper includes a wiping wall 10, a wipe 20, and at least two engaging structures 30. The wiping wall 10 is a side wall that faces the surface of the object to be cleaned when the wiper wipes the object to be cleaned. The outer surface of the wiping wall 10 includes a wiping surface 11, and the wiping surface 11 refers to the surface of the wiping wall 10 exposed outside the scraper, and includes the wiping surface 11 facing the object to be cleaned and a circumferential side surface. Each of the engaging structures 30 is adapted to magnetically engage the squeegee with other squeegees across the object (glass) to be cleaned, for example, two opposing squeegees (i.e., the squeegees on both the inside and outside of the glass) with each other. For example, the two opposing scrapers are equally distributed with the suction structure 30, and when the cleaning device works, the suction structures 30 in the two scrapers respectively stick the two scrapers to the inner surface and the outer surface of the object to be cleaned by mutually sucking.

The wiping material 20 is arranged on the wiping surface 11, the wiping material 20 is arranged to cover the central area of the wiping surface 11 or deviate from the central area of the wiping surface 11, and the suction structures 30 are distributed on the periphery of the wiping material 20.

Note that the wipe 20 covers the central area of the wiping surface 11. Specifically, as shown in fig. 4, the O area indicates the central area of the wiping surface 11, and the wipe 20 may cover only the O area, or the wipe 20 may cover not only the O area but also extend in various directions from the O area. How to extend can be set according to actual design requirements, for example, the wipe 20 in fig. 4 not only covers the O area, but also extends a distance outward in the circumferential direction.

The offset of the wipe 20 from the central region of the wiping surface 11 means that the wipe 20 does not cover the central region of the wiping surface 11, but the wipe 20 is surrounded by the respective engaging structures 30, i.e., the wipe 20 is positioned inwardly of the respective engaging structures 30.

The wiper wipes the glass by the wiper 20, wipes water stains on the glass by the wiper 50, and supplies water to the wiper 20 by the water outlet device 40 to keep the wiper 20 in a wet state, meanwhile, the wiper 20 wipes the glass to scrape the dirt on the surface of the glass by using the friction between the wiper 20 and the glass, so that the wiper 20 is pressed by the wiper during use, water stains on the wiper 20 are pressed to overflow to the glass, if the wiper 20 is disposed at the edge of the wiping surface 11, the wiper 20 and the wiper 50 will not be able to wipe the water spots overflowing to the edge of the wiping surface 11, by providing the wipe 20 in the central region of the wiping surface 11 or in a position offset from the central region but still inside the respective engaging structures 30, the water overflowing from the wipe 20 can be completely wiped clean by the wiping member 50.

According to the scraper, through the structural layout, when the scraper is used for wiping an object to be cleaned, at least one part of the peripheral edge of the scraper is firstly attracted and positioned through the attraction structures 30, then the object to be cleaned is wiped through the wiper 20, namely, the wiping work is performed through the central area of the wiping wall 10 or the areas outside the central area and inside the attraction structures 30, so that the wiping force of the wiper 20 is concentrated, and the wiping effect is good; simultaneously, in the use, the water stain can be extruded to the extrusion that the wiper 20 after soaking received glass and wiping wall 10, because the wiper 20 locates the central zone or the central zone outside and the region within each actuation structure 30, then the water stain of extruding can not flow out the wiper outside, but stay inside the wiper, the wiping strip of being convenient for will water stain and scrape totally, can not leave the water stain. In addition, the edge suction of the scraper on the inner surface and the outer surface of the object to be cleaned is stable through the suction effect of the suction structure 30 distributed on the periphery of the wiper 20, so that the wiping force of the wiper 20 is uniformly distributed, and the wiping effect is better.

In the present embodiment, the wipe 20 is provided to cover a central region of the wiping face 11. Thereby the wiping strength of the wiping material 20 is more concentrated and the wiping effect is better. Meanwhile, after the wiper 20 is extruded, water stains are more difficult to flow out of the outer side of the wiper, so that the wiper strip can wipe the water stains completely without leaving water stains.

Specifically, referring to FIG. 4, the center line of the wipe 20 is positioned to coincide with the center line O1 of the wiping surface 11. That is, the wipe 20 is provided at the very center of the wiping surface 11, for example, when the wiping surface 11 has a square shape, the wipe 20 also has a square shape, and the centers of the two coincide; for another example, when the wiping surface 11 is circular, the wipe 20 is also circular and the centers of the two coincide; for another example, when the wiping surface 11 has a square shape, the wiper 20 has a circular shape, and the centers of the two coincide with each other. In summary, the wiping material 20 is disposed at the center of the wiping surface 11, so that the wiping force of the wiping material 20 is more concentrated, the wiping force is uniformly distributed, and the wiping effect is good.

More specifically, as shown in fig. 2, the wipe 20 is disposed so as to cover the middle section in the lengthwise extending direction of the wiping surface 11. In the embodiment, the wiping surface 11 and the wipe 20 are both square, and when the wipe 20 covers the middle section of the wiping surface 11 in the length extending direction, the wiping strength of the wipe 20 can be concentrated at the middle section of the wiping surface 11, and the wiping strength of the wipe 20 can be improved.

The length of the wiping material 20 covering the length extending direction of the wiping surface 11 can be determined according to the actual design requirement, for example, the length of the wiping material 20 is greater than half of the length of the wiping surface 11, and is not limited herein.

Correspondingly, as shown in fig. 3, the number of the engaging structures 30 is two, and the two engaging structures 30 are symmetrically arranged on two opposite sides of the wiping member 20 along the length extending direction of the wiping surface 11. Wherein, as shown in fig. 2, the wiping face 11 is square, the wiping object 20 is also square, the wiping object 20 covers the middle position of the wiping face 11, two suction structures 30 are arranged on two opposite sides of the wiping object 20 along the width extending direction of the wiping face 11, so that two ends of the wiping wall 10 can be sucked and fixed through the two suction structures 30, then the object to be cleaned is wiped through the wiping object 20 positioned in the middle, the wiping force is concentrated, and the wiping object 20 can extend to the two end edges of the width extending direction of the wiping face 11, thereby the distribution range of the wiping object 20 is larger, the wiping range is larger, the wiping force is more stable, and the wiping is cleaner and more uniform.

In other alternative embodiments, the center line of the wipe 20 may be offset from the center line of the wiping surface 11, i.e. the wipe 20 is not disposed at the center of the wiping wall 10, but the wiping force concentration effect of the wipe 20 can be achieved as long as the wipe 20 covers the center area of the wiping surface 11.

In other alternative embodiments, the peripheral edge of the wipe 20 may be disposed so as to be offset from the peripheral edge of the wiping face 11, i.e., no end of the wipe 20 extends to the edge of the wiping face 11.

For example, as shown in fig. 5, when the wiping surface 11 is circular, the wiper 20 is also circular and is concentrically disposed. Correspondingly, the squeegee can include more than two engaging structures 30, each engaging structure 30 being circumferentially spaced around the periphery of the wipe 20. In this way, the edges of the wiping wall 10 are fixed by the engaging structures 30, and then the object to be cleaned is wiped by the central wiper 20, so that the wiping force is concentrated and uniform.

For example, as shown in fig. 4, when the wiping surface 11 has a square shape, the wiper 20 has a circular shape, and the centers of the two coincide with each other. Correspondingly, the squeegee can include two engaging structures 30, with the two engaging structures 30 being disposed on opposite sides of the wipe 20. Thus, the two sides of the wiping wall 10 are fixed by the two engaging structures 30, and then the object to be cleaned is wiped by the central wiper 20, which has a concentrated and uniform wiping force

As shown in fig. 3, the wiper further includes a water outlet means 40, and the water outlet means 40 is used to replenish water to the wiper 20. The water outlet device 40 supplies water to the wiping object 20 in time, so that the cleaning effect of the wiping object 20 on the object to be cleaned can be ensured, and the frequent water absorption operation of the wiping object 20 and the water spraying to the window of the object to be cleaned by a cleaner back and forth for many times can be avoided.

Specifically, the water outlet device 40 has a water supply cavity 411 and a water outlet 422, the water outlet 422 is formed on the wiping wall 10, a water flow channel is formed between the water supply cavity 411 and the water outlet 422, water in the water supply cavity 411 can flow into the water outlet 422 through the water flow channel, and water is supplied to the wiping material 20 on the wiping surface 11 and the surface of the object to be cleaned through the water outlet 422, so as to ensure the cleaning effect of the wiper on the surface of the object to be cleaned.

The water discharge device 40 further includes a valve element 43, the valve element 43 being disposed on the water flow passage, the valve element 43 being configured to: under the action of the first acting force, the scraper is displaced relative to the water supply cavity 411 and the water outlet 422, so that the water flow channel is communicated.

Specifically, the first acting force includes an inertia force and/or a gravity force, and the valve element 43 is movably disposed inside the wiper to open or close the water flow passage. The valve core 43 is reasonably kept in the scraper, and can displace relative to the scraper under the action of self-borne inertia force and/or gravity, so that the valve port is opened, a water flow channel between the water supply cavity 411 and the water outlet 422 is conducted, water in the water supply cavity 411 can flow into the water outlet 422, and water is supplied to the wiper 20 on the wiping surface 11 through the water outlet 422.

When the movement state of the wiper changes (for example, increases or decreases), the valve element 43 generates acceleration, the valve element 43 has inertia to make itself tend to keep the original movement state, and at this time, the valve element 43 receives the inertia force opposite to the acceleration direction, and under the action of the inertia force, the valve element 43 can displace relative to the wiper, the valve port is opened, and the water flow channel between the water supply cavity 411 and the water outlet 422 is conducted.

For example, when the scraper is used, the scraper needs to be attached to the surface of an object to be cleaned and moved back and forth, and the scraper provided by the embodiment of the application can make full use of the moving kinetic energy to enable the valve core 43 to be acted by inertia force, so that the valve core 43 is displaced relative to the scraper body, and further a water flow channel between the water supply cavity 411 and the water outlet 422 is conducted.

For another example, before the cleaning operation, the user may change the motion state of the wiper by means of translation, shaking, swinging, shaking, switching the moving direction (also rotating), and the like, at this time, the valve element 43 may be acted by the inertia force, the valve element 43 may be displaced relative to the wiper body, so that the water flow channel between the water supply cavity 411 and the water outlet 422 is conducted, and the water supply cavity 411 may supply water to the wiper 20 on the wiping surface 11 and the surface of the object to be cleaned.

Here, the inertial force means: when the object has an acceleration, the inertia of the object will make the object tend to keep the original motion state, and at this time, if the object is used as a reference system and a coordinate system is established on the reference system, it seems as if a force in the opposite direction acts on the object to displace the object in the coordinate system, so the force is called as an inertia force.

The inertial force is generally divided into a translational inertial force and a rotational inertial force. For the translational inertia force, the magnitude of the inertia force is related to the mass m and the acceleration a, and the inertia force F is-ma. Wherein the negative sign indicates that the direction of the inertial force is opposite to the direction of the acceleration. The larger the acceleration a is, the larger the inertia force F borne by the self-body is, and when the acceleration is 0, the inertia force F borne by the self-body is equal to 0. That is, when the spool 43 is in a stationary state or a uniform linear motion state, the spool 43 is not acted on by the inertia force, and the spool 43 cannot be moved by the inertia force.

In the rotating frame of reference, the object is also subjected to inertial forces, which are divided into inertial centrifugal and coriolis forces. That is, the spool 43 may also be subjected to rotational inertia force.

In summary, the user can move the scraper through non-uniform translation, shaking, rotating or swinging, so that the valve element 43 is acted by the translation inertia force or the rotation inertia force, and the valve element 43 can be displaced to open the valve port.

The valve core 43 can also be displaced relative to the scraper under the action of gravity, and the valve core 43 is opened, so that the water flow channel between the water supply cavity 411 and the water outlet 422 is conducted. At this time, the user can rotate the angle of the wiper, so that the valve core 43 is separated from the valve port under the action of gravity to open the valve port, and the water flow channel between the water supply cavity 411 and the water outlet 422 is conducted.

Alternatively, in order to enable the spool 43 to be subjected to a sufficiently large inertial force and/or gravity, the spool 43 should have a sufficient mass.

Alternatively, the spool 43 may be made of metal, such as stainless steel or copper alloy, aluminum alloy, or the like.

Alternatively, the valve element 43 can also be made of a denser plastic.

Alternatively, the valve element 43 may be made of glass.

Because the valve element 43 can be simultaneously acted by the inertia force and the gravity force, the displacement of the valve element 43 can be caused by either the inertia force or the gravity force, or both, which is not limited in the present application.

Further, the spool 43 is also configured to: under the action of the second acting force, the scraper is displaced relative to the water supply cavity 411 and the water outlet 422, so that the water flow channel is closed.

Wherein the second acting force includes an inertia force and/or a gravity force, and when the trigger water flow passage is closed and the trigger water flow passage is opened under the condition that the first acting force and the second acting force are completely the same, the direction of displacement of the valve core 43 relative to the scraper is different.

Optionally, the spool 43 is configured to: under the action of the self-borne inertia force, the valve core 43 is displaced relative to the scraper, so that the water flow channel between the water supply cavity 411 and the water outlet 422 is closed.

Optionally, the spool 43 is configured to: under the action of gravity, the valve core 43 is displaced relative to the scraper, so that the water flow channel between the water supply cavity 411 and the water outlet 422 is closed.

Optionally, the spool 43 is configured to: under the action of the inertia force and gravity, the valve core 43 is displaced relative to the scraper, so that the water flow channel between the water supply cavity 411 and the water outlet 422 is closed.

According to the scraper that this application embodiment provided, case 43 can move under the effect of inertia force and/or gravity that self received, and the user can make case 43 take place to remove through translation at the non-uniform velocity this moment, wave, rock, mode such as rotation or swing, and then makes the rivers passageway between water supply chamber 411 and delivery port 422 switched on, and this kind of mode of going out water is simple easy-to-use, can convenience of customers 'use, and user's acceptance is high, is favorable to the extensive popularization and application of product from this.

Similarly, the valve core 43 can be displaced relative to the scraper under the action of its own inertia force and/or gravity force to close the valve port, so that the water flow passage between the water supply chamber 411 and the water outlet 422 is closed. At this time, the user may close the valve port in a manner similar to the aforementioned manner of opening the valve port (for example, the valve element 43 moves through a non-uniform translational motion, a shaking motion, a rotating motion, or a swinging motion), which is not described herein again.

It should be noted that the valve core 43 is moved to open or close the valve port, which can be realized under different forces, and there is no necessary cause and effect relationship between the two, which is not limited in the present application.

Alternatively, the valve element 43 may open the valve port under its own inertial force and/or gravity and close the valve port under its own gravity.

For example, the scraper may be rotated in a direction such that the spool 43 is disengaged from the valve port by gravity to open the valve port. When the valve port needs to be closed, the scraper can be rotated in the opposite direction, so that the valve core 43 is reset under the action of gravity to close the valve port.

Alternatively, the valve element 43 may open the valve port under its own inertial force and/or gravity, and close the valve port under its own inertial force.

For example, the wiper may be moved in a direction such that the spool 43 is disengaged from the valve port by the inertial force to open the valve port. When the valve port needs to be closed, the scraper can be moved in the opposite direction, so that the valve core 43 is reset under the action of inertia force in the opposite direction to close the valve port.

Alternatively, the valve element 43 may open the valve port under its own inertial force and/or gravity, and close the valve port under its own inertial force and gravity.

It is worth mentioning that, because there is water in the water flow channel, the valve core 43 still receives the effect of water pressure, and the valve core 43 that this application embodiment provided can overcome the effect of water pressure, makes the valve core 43 can open or close the valve port under the effect of the inertia force and/or the gravity that self received.

Optionally, in other embodiment modes, the spool 43 is further configured to: under the action of the elastic force or the magnetic force, the scraper is displaced relative to the water supply cavity 411 and the water outlet 422, so that the water flow channel is closed.

That is, the valve element 43 may be configured to be normally closed, the valve element 43 can be moved under the action of inertia and/or gravity to open the valve port, and the valve element 43 can be reset under the action of elastic force or magnetic force to close the valve port, so that the water flow passage between the water supply chamber 411 and the water outlet 422 is closed.

For example, a spring is provided between the valve element 43 and the wiper, and the valve element 43 may be reset by an elastic force (pulling force or pushing force) of the spring to close the valve port.

For another example, the magnetic engagement between the valve element 43 and the scraper can cause the valve element 43 to be reset by the magnetic force (attractive force or repulsive force) of the magnet to close the valve port.

As shown in fig. 3, the water flow passage includes a valve chamber 421, a first end of the valve chamber 421 is communicated with the water supply chamber 411, a second end of the valve chamber 421 is communicated with the water outlet 422, and a second end of the valve chamber 421 forms a throat (equivalent to a valve port); the valve core 43 is movably disposed in the valve cavity 421, and is configured to: when the valve core 43 is far away from the necking, the necking is opened, so that a water flow channel between the water supply cavity 411 and the water outlet 422 is conducted; when the valve core 43 is close to the necking opening, the necking opening is blocked, so that the water flow channel between the water supply cavity 411 and the water outlet 422 is closed.

In the embodiment of the present application, the valve element 43 is a ball (ball 74), and the throat is a circular throat, and the sizes of the two are adapted, so that when the valve element 43 blocks the circular throat, the throat can be completely closed, and at this time, the water flow cannot flow out through the throat.

As shown in fig. 3, a first end (an end close to the water supply chamber 411) of the valve chamber 421 is provided with a stopper 44, and the stopper 44 is used for limiting the valve element 43 in the valve chamber 421. With the above arrangement, the valve body 43 can be held in the valve chamber 421 and cannot be moved into the water supply chamber 411, and the operating state of the valve body 43 can be controlled more effectively.

The form of the position-limiting member 44 is not limited, and the position-limiting member should be included in the protection scope of the present application as long as the position-limiting member can perform the aforementioned position-limiting function on the premise of ensuring the communication between the first end of the valve chamber 421 and the water supply chamber 411. As shown in fig. 3, in the embodiment of the present application, the position-limiting member 44 is a position-limiting sleeve, a hollow structure for water to flow through is provided inside the position-limiting sleeve, and a front end portion of the position-limiting sleeve can extend into the valve cavity 421 to perform a better position-limiting function.

As shown in fig. 3, the scraper further includes a housing 90, the housing 90 is covered on one side of the wiping wall 10 and forms a mounting cavity with the wiping wall 10, and the suction structure 30 is mounted in the mounting cavity.

The water outlet device 40 further includes a water supply tank 41 and a water outlet pipe 42, a water supply chamber 411 is formed in the water supply tank 41, and a valve chamber 421 is formed in the water outlet pipe 42. The water supply tank 41 has an open top, and the top of the water supply tank 41 abuts against the inner side wall of the housing 90. One end of the water outlet pipe 42 is connected with the water supply tank 41, a positioning hole is arranged on the wiper 20, the other end of the water outlet pipe 42 penetrates through the wiping wall 10 and is arranged in the positioning hole in a penetrating way, and the other end of the water outlet pipe 42 forms a water outlet 422.

Specifically, the water outlet device 40 includes two water outlet pipes 42, and the two water outlet pipes 42 are spaced along the length extension direction of the wiping surface 11 and are respectively connected to the water supply tank 41. The wiper 20 is provided with two positioning holes, and the other ends of the two water outlet pipes 42 are respectively arranged in the two positioning holes in a penetrating way. By providing two water outlet pipes 42 for supplying water to the wiper 20, the wiper 20 can be quickly soaked, and the water can be uniformly supplied to the wiper 20, so that the wiping effect is improved.

In order to increase the water storage amount of the water supply tank 41, the cross-sectional area of the water supply tank 41 is provided in a shape similar to the cross-sectional area of the housing 90, and the cross-sectional area of the water supply tank 41 is slightly smaller than the cross-sectional area of the housing 90.

The top of the outer cover 90 is provided with a water inlet which is communicated with the water supply cavity 411, and the water inlet is provided with a sealing plug 45. When water supply is needed, the sealing plug 45 is opened, and water is supplied to the water supply cavity 411 from the water inlet; after the water supply cavity 411 is full of water, the water inlet is sealed by the sealing plug 45.

As shown in fig. 1, 2 and 6, the scraper further includes two scraping elements 50, and the two scraping elements 50 are both arranged along the length extension direction of the wiping surface 11 and are respectively arranged at two sides of the wiping object 20 along the width extension direction of the wiping surface 11.

Specifically, the scraping members 50 are scraping strips, two scraping strips are respectively disposed on two sides of the wiping object 20 in the width extending direction of the wiping surface 11, and the two scraping members 50 are configured to: the operation is alternated according to the wiping direction of the scraper. Specifically, the scrapers 50 are used for scraping water stains on the surface of the object to be cleaned after the wiper 20 brushes and cleans the surface of the object to be cleaned, so that only one of the scrapers 50 on both sides of the wiper 20 is in operation at a time. For example, as shown in fig. 2, when the scraper moves to the right, the left scraper 50 is located behind the wiper 20, and the right scraper 50 is located in the forward direction of the wiper 20, according to the principle of scraping the wiper 50 after the wiper 20, the left scraper 50 is operated, and the right scraper 50 is not operated. When the scraper is moved to the left, the operation of the two scraping elements 50 just alternates.

This application is through setting up two scraping pieces 50 to locate scraping piece 50 and wipe 20 along the both sides of wiping face 11 width extending direction, thereby make wiping 20 no matter be forward or reverse work, all can have corresponding scraping piece 50 to carry out the work of ending, and then improved the efficiency of wiping of scraping ware. It will be appreciated that in other embodiments of the present application, the scraper may be provided with only one scraper 50, and the scraper 50 is disposed on one side of the wiper 20 along the length of the wiping surface 11, which is not limited herein.

Since the water stains on the wiping material 20 are extruded and then spread outwards, and possibly overflow to positions beyond two ends of the wiping wall 10, the wiping wall 10 is quadrilateral, and two ends of the scraping piece 50 extend out of the wiping wall 10, so that the wiping area of the scraping piece 50 can be enlarged, and the water stains at two ends of the wiping wall 10 can be wiped cleanly; in addition, the wiping area of the wiper 50 is enlarged, so that the wiper can repeatedly wipe different positions during wiping of the glass by the wiper, thereby improving the wiping effect of the wiper 50 on the glass.

As shown in fig. 6-8, the scraper further comprises a friction member 60 and a transmission assembly 70, wherein the friction member 60 is in transmission connection with the two scraping members 50 through the transmission assembly 70; the friction member 60 is configured to: when the scraper scrapes the surface to be cleaned, the scraper moves backwards relative to the scraper under the action of the friction force with the surface to be cleaned, and drives the scraping piece 50 positioned at the front side in the travelling direction to be away from the surface to be cleaned through the transmission assembly 70 to be out of work, and drives the scraping piece 50 positioned at the rear side in the travelling direction to be close to the surface to be cleaned through the transmission assembly 70 to perform scraping work.

The friction member 60 is in transmission connection with the two scraping members 50 through the transmission assembly 70, i.e. the friction member 60 can drive the two scraping members 50 to move through the transmission assembly 70. The transmission assembly 70 may include any of a plurality of different components (gears, racks, cams, eccentric wheels, sliders, belts, connecting rods, etc.) and different connection relationships (butt joints, hinges, sliding connections, gear-rack connections, belt connections, pin-and-runner connections, etc.) to cooperate with each other, so as to transmit the movement of the friction member 60 to the two scraping members 50, and thus to drive the scraping members 50 to move.

Specifically, the transmission assembly 70 includes a swinging member 71, and the swinging member 71 is swung and disposed on the inner side of the wiping wall 10, specifically, in a mounting cavity formed by the enclosure 90 and the wiping wall 10. The two scraping pieces 50 are respectively fixedly connected with two ends of the swinging piece 71; the swinging member 71 is drivingly connected to the friction member 60, and when the scraper moves to scrape the surface to be cleaned, the friction member 60 can drive the friction member 60 to swing such that the end of the friction member 60 located on the front side in the traveling direction is away from the surface to be cleaned and the end located on the rear side in the traveling direction is close to the surface to be cleaned. The swinging piece 71 arranged in a swinging mode drives the two scraping pieces 50 to work alternately, the transmission of the swinging piece is more stable and controllable, and the two scraping pieces 50 can be switched and controlled more conveniently and efficiently.

As shown in fig. 8, the swinging member 71 includes two swinging rods 711 and two fixing seats 712. The two fixing seats 712 are distributed at intervals along the width extension direction of the wiping surface 11, the two fixing seats 712 respectively extend along the length extension direction of the wiping surface 11, and the two fixing seats 712 are respectively used for installing the two scraping elements 50. The two oscillating levers 711 are distributed at intervals along the longitudinal extension direction of the wiping surface 11, and both ends of the two oscillating levers 711 are respectively connected with the two fixing bases 712 integrally. The two swing levers 711 are respectively swingably provided inside the wiping wall 10.

Specifically, the oscillating rod 711 is U-shaped, and the oscillating rod 711 can be hinged to the wiping wall 10, for example, the bottom of the oscillating rod 711 is hinged to the wiping wall 10 through a hinge structure; or the oscillating member 71 can be hinged to any structure in the housing to move the two scraping members 50. Of course, the swinging member 71 may be not in a hinged relationship with other structures, but may be in surface contact with a curved surface to realize swinging.

In addition, the transmission assembly 70 further comprises a moving member 72, and the moving member 72 is connected with the friction member 60 and the swinging member 71 respectively. When the scraper moves to clean the surface to be cleaned, the friction member 60 can drive the moving member 72 to move backward relative to the scraper in the traveling direction, that is, the moving member 72 can move synchronously with the friction member 60, and the moving member 72 can drive the swinging member 71 to swing in the moving process. In general, when the scraper moves to clean the surface to be cleaned, the friction member 60 can drive the swinging member 71 to swing through the moving member 72, and the transmission structure is simple and the transmission efficiency is high.

Specifically, please refer to fig. 7, a guide rail 73 is disposed in the mounting cavity, a ball 74 is disposed on the moving member 72, the moving member 72 slides along the guide rail 73 through the ball 74, that is, the moving member 72 is guided by the ball 74 and the guide rail 73, so as to ensure that the moving member 72 moves stably.

The guide rails 73 may be provided on the cover 90 and horizontally provided in the installation cavity, and the guide rails 73 may be directly provided outside the bottom of the water supply tank 41.

The moving member 72 is provided with two receiving grooves, the two balls 74 are respectively received in the receiving grooves, and at least a portion of the two balls 74 extend out of the receiving grooves to be slidably disposed on the guide rail 73.

In the present application, as shown in fig. 8 to 10, the swinging member 71 and the moving member 72 are connected by curved surface contact, thereby achieving swinging of the swinging member 71. Specifically, the top of the swing lever 711 has two first engagement surfaces 7111 at both ends in the width extending direction of the wiping surface 11, and the bottom of the moving member 72 has two second engagement surfaces 721 at both ends in the width extending direction of the wiping surface 11. The first engagement face 7111 is arc-shaped, the second engagement face 721 is also arc-shaped, and the radius of curvature of the first engagement face 7111 is greater than the radius of curvature of the second engagement face 721. The second mating surface 721 is provided with an arc-shaped rib 722, the rib 722 abuts against the first mating surface 7111, when the moving member 72 moves rightwards, the rib 722 abuts against and pushes the first mating surface 7111 at the right end to swing downwards, so as to drive the right end of the swinging member 71 to swing downwards and drive the left end of the swinging member 71 to swing upwards, that is, the scraping member 50 at the right end is driven to be close to the surface to be cleaned, and the scraping member 50 at the left end is driven to be far away from the surface to be cleaned.

This application realizes the swing that the removal of moving member 72 drove oscillating piece 71 through the contact cooperation between first fitting surface 7111 and the second fitting surface 721 on oscillating piece 71 and the moving member 72, simple structure, and transmission problem.

In addition, each of the two swing rods 711 has two segments of first engagement surfaces 7111, and correspondingly, two sets of second engagement surfaces 721 are also disposed on the moving member 72.

Referring to fig. 3, the driving assembly 70 further includes a connecting member 75, the connecting member 75 is disposed through the wiping wall 10 and the wiper 20, the friction member 60 is mounted on one end of the connecting member 75, and the other end of the connecting member 75 is connected to the moving member 72. When the friction member 60 moves, the connecting member 75 is moved, and the moving member 72 is moved. The friction member 60 can be made of a material with a suitable coefficient of friction by the arrangement of the connecting member 75, and the moving member 72 can be made of other common materials.

Specifically, the friction member 60 may be a friction block or a suction cup. The friction block can be made of plastic, rubber, resin, metal and leather lamp materials.

Referring to fig. 3, the two water outlet pipes 42 are exactly disposed between the two swing rods 711, the moving member 72 is provided with a clearance slot corresponding to the two water outlet pipes 42 for the two water outlet pipes 42 to pass through, and the water supply slot 41 is located above the moving member 72. Thus, the moving member 72 and the swinging member 71 are provided without interfering with the water supply tank 41 and the water outlet pipe 42, and the volume of the water supply tank 41 can be maximized.

As shown in fig. 1 to 3, the scraper further comprises a suction cup 80, the suction cup 80 being adapted to be sucked onto a surface to be cleaned. Through setting up sucking disc 80 for when taking off the scraper of treating the cleaning object inboard, the actuation structure 30 magnetic force of inside and outside both sides scraper disappears, then lies in the scraper of treating the cleaning object outside and can adsorb on treating cleaning surface through sucking disc 80, and can not drop, thereby plays the guard action to the outside scraper.

Specifically, the suction cup 80 is mounted on the wiping wall 10 and is capable of deforming to adhere to the surface of the object to be cleaned, and it is worth mentioning that when the suction cup 80 adheres to the surface to be cleaned, the adhesion force between the suction cup 80 and the surface to be cleaned is at least greater than the gravity when the scraper itself adheres to the surface to be cleaned.

The wiping wall 10 is provided with two suckers 80, the two suckers 80 are distributed at intervals along the length extension direction of the wiping surface 11, the two suckers 80 are arranged corresponding to the two suction structures 30, and the two suction structures 30 are arranged on the inner side of the wiping wall 10. When in use, the scrapers at the inner side and the outer side of the object to be cleaned are absorbed and attached to the inner side and the outer side of the object to be cleaned through the absorption structure 30; when the inner wiper is taken off, the suction structures 30 at both sides are separated to lose suction force, and the outer wiper tends to fall, so that the suction cup 80 is deformed and adsorbed at the outer side of the object to be cleaned, thereby preventing the wiper from falling.

In a second aspect, please refer to fig. 11, the present application further provides a scraper assembly, which includes a first scraper 200 and a second scraper 300, at least one of the first scraper 200 and the second scraper 300 is the above-mentioned scraper, and the first scraper 200 and the second scraper 300 are attracted by an absorption force. In the present application, the first scraper 200 and the second scraper 300 are both the above-mentioned scrapers, and the first scraper 200 and the second scraper 300 are magnetically attracted by the attraction structure 30 of the two. Specifically, the attracting structures 30 at corresponding positions of the first scraper 200 and the second scraper 300 are just attracted magnetically, so that the first scraper 200 and the second scraper 300 can be attracted mutually.

The scraper assembly further comprises a connecting block 100, and when the scraper assembly is not used, the connecting block 100 is used for connecting one sides of the first scraper 200 and the second scraper 300 for work together, so that the first scraper 200 and the second scraper 300 are prevented from being separated, and the scraper assembly is convenient to store and carry.

A plurality of clamping blocks are arranged on the connecting block 100, clamping grooves are formed in the first scraper 200 and the second scraper 300, and the clamping blocks on one side of the connecting block 100 are respectively buckled on the first scraper 200, so that the connecting block 100 is connected with the first scraper 200; the latch on the other side of the connecting block 100 is buckled on the latch groove of the second scraper 300, so that the connecting block 100 is connected with the second scraper 300, and finally the first scraper 200 is connected with the second scraper 300.

In other embodiments of the present application, the connection block 100 may be connected to the first scraper 200 and the second scraper 300 by means of a plug, a screw lock, or the like, which is not particularly limited herein.

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 (21)

1. A scraper is characterized by comprising a wiping wall and at least two suction structures, wherein the suction structures are used for attracting the scraper with other scrapers through magnetic force at intervals of an object to be cleaned; the outer surface of the wiping wall comprises a wiping surface;

the wiping surface is provided with a wiping material, the wiping material is arranged to cover the central area of the wiping surface or deviate from the central area of the wiping surface, and the attraction structures are distributed on the periphery of the wiping material.

2. The scraper of claim 1 wherein the wiper is disposed to cover a central region of the wiping surface and a centerline of the wiper is disposed offset from the centerline of the wiping surface.

3. A scraper according to claim 1, characterized in that the wiper is arranged to cover a central area of the wiping surface and that the centre line of the wiper is arranged to coincide with the centre line of the wiping surface.

4. A scraper according to claim 3, in which a peripheral edge of the wiper is arranged offset from a peripheral edge of the wiping surface.

5. The squeegee of claim 1, wherein each of the engagement structures is circumferentially spaced around the periphery of the wipe.

6. A scraper according to claim 3, in which the wiper is arranged to cover a mid-section of the wiping surface in the direction of its length.

7. The scraper of claim 1, wherein the number of the engaging structures is two, and the two engaging structures are symmetrically disposed on opposite sides of the wiper along the extension direction of the wiping surface.

8. The scraper of claim 1 further comprising a water outlet for replenishing water to said wiper.

9. The scraper of claim 8, wherein said water outlet means has a water supply chamber and a water outlet, a water flow path being provided between said water outlet and said water supply chamber, said water outlet being provided in said wiping wall and adapted to supply water to said wiper;

the water outlet device further comprises a valve core arranged on the water flow channel, and the valve core is configured to:

under the action of a first acting force, the scraper is displaced relative to the water supply cavity, so that a water flow channel between the water supply cavity and the water outlet is communicated;

under the action of second acting force, the scraper is displaced relative to the water supply cavity, so that a water flow channel between the water supply cavity and the water outlet is closed, the first acting force comprises inertia force and/or gravity, and the second acting force comprises inertia force and/or gravity.

10. The scraper of claim 9 wherein the direction of displacement of said valve element relative to said scraper when said water flow passage is triggered to be closed and said water flow passage is triggered to be open is different when said first force and said second force are substantially the same.

11. The scraper of claim 9 wherein said water flow passage includes a valve chamber, a first end of said valve chamber communicating with said water supply chamber and a second end of said valve chamber communicating with said water outlet, a second end of said valve chamber forming a constriction; the valve core is movably arranged in the valve cavity and is configured to:

the valve core is far away from and opens the necking so as to lead a water flow channel between the water supply cavity and the water outlet to be communicated;

the valve core is close to and blocks the necking so that a water flow channel between the water supply cavity and the water outlet is closed.

12. The scraper of claim 11 wherein a first end of said valve chamber is provided with a retainer for retaining said valve spool within said valve chamber.

13. The scraper of claim 11 wherein said water outlet means further comprises a water supply tank and an outlet pipe, said water supply chamber being formed in said water supply tank and said valve chamber being formed in said outlet pipe;

one end of the water outlet pipe is communicated with the water supply tank, a positioning hole is formed in the wiper, and the other end of the water outlet pipe penetrates through the wiping wall and is arranged in the positioning hole in a penetrating mode.

14. A scraper according to any one of claims 1 to 13, further comprising a scraper member disposed on one side of the wipe in the direction of the lengthwise extension of the wiping surface.

15. A scraper according to any one of claims 1 to 13, further comprising two scraping members, both arranged along the length of the wiping surface and arranged on either side of the wiper.

16. The scraper of claim 15 wherein said wiping wall is quadrilateral in shape, with both ends of said scraper extending beyond said wiping wall.

17. The scraper of claim 16, wherein two of said scraping members are configured to: the scrapers work alternately according to different wiping directions; the scraper also comprises a friction piece and a transmission assembly, and the friction piece is in transmission connection with the two scraping pieces through the transmission assembly; the friction member is configured to:

when the scraper scrapes the surface to be cleaned, the friction piece moves backwards relative to the scraper under the action of friction force between the friction piece and the surface to be cleaned, the transmission assembly drives the scraping piece positioned on the front side in the advancing direction to be away from the surface to be cleaned and does not work, and the transmission assembly drives the scraping piece positioned on the rear side in the advancing direction to be close to the surface to be cleaned so as to conduct scraping work.

18. The scraper of claim 17 wherein said drive assembly includes an oscillating member oscillating on said wiping wall, said two scraping members being fixedly connected to respective ends of said oscillating member;

the swinging piece is in transmission connection with the friction piece, and the friction piece can drive the friction piece to swing when the scraper moves to scrape the surface to be cleaned, so that one end of the friction piece, which is positioned on the front side of the travelling direction, is far away from the surface to be cleaned, and one end of the friction piece, which is positioned on the rear side of the travelling direction, is close to the surface to be cleaned.

19. The scraper of claim 18 wherein said transmission assembly further comprises a moving member, said friction member being capable of driving said moving member in a rearward direction relative to said scraper in said direction of travel, said moving member being capable of driving said oscillating member to oscillate.

20. A scraper according to any one of claims 1 to 13, further comprising a suction cup adapted to be sucked onto a surface to be cleaned.

21. A scraper assembly comprising a first scraper and a second scraper which are attracted to each other by suction, at least one of said first scraper and said second scraper being a scraper as claimed in any one of claims 1 to 20.

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