Squeegee and cleaning base station

Abstract

Provided are a squeegee and a cleaning base station. The squeegee comprises a mounting part (10) and a squeegee arm (11). The mounting part (10) is used for rotatably connecting to a cleaning disc, and the mounting part (10) can rotate in a first direction. The squeegee arm (11) comprises a root portion and an end portion, the root portion of the squeegee arm (11) being connected to the mounting part (10), such that the squeegee arm (11) can rotate in the first direction under the driving of the mounting part (10). The squeegee arm (11) comprises a first section (111), the contour line of the outer side of the first section (111) being curved, the first section (111) comprising a root portion and an end portion, and the root portion of the first section (111) being the root portion of the squeegee arm (11). The direction in which the root portion of the first section (111) extends towards the end portion of the first section (111) along the contour line of the outer side of the first section (111) is opposite to the first direction, and the first direction is a clockwise direction or a counterclockwise direction. The outer side of the squeegee arm (11) is the side of the squeegee arm (11) that, when the squeegee arm (11) rotates in the first direction, can first come into contact with a material to be cleaned that is located in the cleaning disc.

Description

Wiper strip and cleaning base station Cross-reference to Related Applications

[0001] The present disclosure claims priority to Chinese Patent Application No. 202422407902.9, filed September 30, 2024, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0002] The present disclosure belongs to the technical field of cleaning wiper strips, and specifically relates to a wiper strip and a cleaning base station. BACKGROUND

[0003] After wet cleaning, a cleaning robot returns to a cleaning base station to clean wet cleaning components. At the cleaning base station, a cleaning roller rinses and scrapes the wet cleaning components on the cleaning robot, and the generated sewage falls into a cleaning tray on the cleaning base station. Then, a self-cleaning module on the cleaning base station drives the wiper strip to rotate around the cleaning tray hole shaft through a transmission mechanism, and pushes the sewage in the cleaning tray to move, so as to push the sewage into a sewage pool, thereby performing self-cleaning on the cleaning tray. SUMMARY

[0004] The present disclosure aims to at least solve one of the problems in the prior art or related art.

[0005] To this end, a first aspect of the present disclosure provides a wiper strip.

[0006] A second aspect of the present disclosure provides a cleaning base station.

[0007] The wiper strip according to the first aspect of the embodiments of the present disclosure comprises: a mounting portion, the mounting portion being used for being rotatably connected to a cleaning tray, the mounting portion being capable of rotating in a first direction; and a wiper strip arm, the wiper strip arm comprising a root portion and an end portion, the root portion of the wiper strip arm being connected to the mounting portion, so that the wiper strip arm is capable of rotating in the first direction under the driving of the mounting portion. The wiper strip arm comprises a first segment, an outline of an outer side of the first segment being in an arc shape, the first segment comprising the root portion and the end portion, the root portion of the first segment being the root portion of the wiper strip arm. An extension direction of the root portion of the first segment to the end portion of the first segment along the outline of the outer side of the first segment is an opposite direction of the first direction; the first direction is a clockwise direction or a counterclockwise direction; and the outer side of the wiper strip arm is a side of the wiper strip arm which is first contacted with a to-be-cleaned substance located in the cleaning tray when the wiper strip arm rotates in the first direction.

[0008] In an embodiment, the wiper arm comprises a first side and a second side. If the wiper arm is a symmetric figure, the first side or the second side is the outer side of the wiper arm. If the wiper arm is a non-symmetric figure, and the extension of the profile line of the first side of the first section has one intersection with the outer edge of the mounting portion and the extension of the profile line of the second side of the first section has two intersections with the outer edge of the mounting portion, the first side is the outer side of the wiper arm. If the wiper arm is a non-symmetric figure, and the extension of the profile line of the first side of the first section has two intersections with the outer edge of the mounting portion and the extension of the profile line of the second side of the first section has two intersections with the outer edge of the mounting portion, the one having a larger split ratio between the first side and the second side is the outer side of the wiper arm; wherein the extension of the profile line of one side of the wiper arm cuts the mounting portion into two parts, and the ratio of the area of the larger part to the area of the smaller part is the split ratio corresponding to the side.

[0009] In an embodiment, the angle between the normal vector of the arc at the midpoint of the arc and the first ray is obtuse; the first ray is a ray from the center point of the mounting portion to the outer side point of the end of the first section.

[0010] In an embodiment, the wiper arm further comprises a second section, the second section comprising a root and an end, the root of the second section smoothly transitions to the end of the first section, and the root of the second section is connected to the end of the first section; and the profile line of the outer side of the second section is an arc, and the extension of the root of the second section along the profile line of the outer side of the second section to the end of the second section is in the same direction as the first direction.

[0011] In an embodiment, the profile line of the outer side of the first section is a circular arc, the mounting portion is a disc, and the profile line of the outer side of the first section is inscribed in the outer edge of the mounting portion.

[0012] In an embodiment, two straight lines passing through the center point of the mounting portion and perpendicular to each other are the first axis and the second axis, the center point of the mounting portion is the first point, the intersection of the outer edge of the mounting portion and the first axis is the second point, and the first target point on the first axis and on the opposite side of the second point with respect to the second axis is the center of a first circle, and the distance from the first target point to the second point is the radius of the first circle; the intersection of the first circle and the second axis is the third point; the profile line of the outer side of the first section is a circular arc on the first circle between the second point and the third point; and the outer side point of the end of the first section is the intersection of the end of the first section and the profile line of the outer side of the first section.

[0013] In an embodiment, the blade arm further comprises a second section, the second section comprises a root and an end, the root of the second section smoothly transitions with the end of the first section, the root of the second section is connected with the end of the first section; the profile line of the outer side of the second section is arc-shaped, the extension direction of the root of the second section along the profile line of the outer side of the second section to the end of the second section is the same as the first direction; a circle with the end of the second section as the outer side point of the end of the second section and the first point as the center and the distance from the first point to the first point as the radius is a second circle; a circle passing through the third point and externally tangent to the first circle is a third circle, one intersection point of the third circle and the second circle is a fourth point; the outer side point of the end of the second section is the intersection point of the end of the second section and the profile line of the outer side of the second section; and the profile line of the outer side of the second section is the circular arc between the third point and the fourth point on the third circle.

[0014] In an embodiment, the blade arm further comprises a second section, the second section comprises a root and an end, the root of the second section smoothly transitions with the end of the first section, the root of the second section is connected with the end of the first section; the profile line of the outer side of the second section is arc-shaped, the extension direction of the root of the second section along the profile line of the outer side of the second section to the end of the second section is the same as the first direction; a circle with the end of the second section as the outer side point of the end of the second section and the first point as the center and the distance from the first point to the first point as the radius is a second circle; a circle passing through the third point and externally tangent to the first circle is a third circle, one intersection point of the third circle and the second circle is a fourth point; the outer side point of the end of the second section is the intersection point of the end of the second section and the profile line of the outer side of the second section; and the profile line of the outer side of the second section is the circular arc between the third point and the fourth point on the third circle.

[0015] In an embodiment, the profile line of the outer side of the second section and the projection length ratio of the profile line of the outer side of the blade arm on the second axis is 1:4-1:6.

[0016] In an embodiment, the profile line of the inner side of the blade arm is a straight line; or, the profile line of the inner side of the blade arm is arc-shaped, the curvature of the profile line of the inner side of the blade arm is not greater than the curvature of the profile line of the outer side of the blade arm; or, the profile line of the inner side of the blade arm is arc-shaped, and the blade arm is an axisymmetric figure, the profile line of the inner side of the blade arm and the profile line of the outer side of the blade arm are symmetrical relative to the symmetry axis of the blade arm. The inner side of the blade arm is the side of the blade arm that can contact the substance to be cleaned in the cleaning tray when the blade arm rotates in the first direction.

[0017] In an embodiment, the blade further comprises: an elastic part, the elastic part wraps the profile line of the outer side of the blade arm and the profile line of the inner side of the blade arm. The lower edge of the elastic part is lower than the lower edge of the blade arm, so that the lower edge of the elastic part can contact the bottom of the cleaning tray when the blade arm rotates in the first direction; and / or, the elastic part protrudes from the end of the blade arm along the profile line of the outer side of the blade arm and the profile line of the inner side of the blade arm, so that the elastic part can be in interference fit with the side of the cleaning tray. The inner side of the blade arm is the side of the blade arm that can contact the substance to be cleaned in the cleaning tray when the blade arm rotates.

[0018] In an embodiment, a protrusion is arranged at the lower edge of the elastic part, and the protrusion can contact the bottom of the cleaning tray.

[0019] In one embodiment, a bayonet is arranged on the wiper arm, a protrusion is arranged on the elastic part, the protrusion is inserted into the bayonet, and the elastic part is fixed to the wiper arm.

[0020] According to a second aspect of the embodiments of the present disclosure, a cleaning base station is provided, which comprises a shell, a cleaning tray and a sewage tank arranged on the shell, and a wiper according to the first aspect of the embodiments of the present disclosure. The mounting part is rotatably arranged in the cleaning tray, and is used to drive the wiper arm to rotate around the center point of the mounting part, and to push the material to be cleaned in the cleaning tray to the sewage tank. The sewage tank is located on the rotating path of the wiper arm. BRIEF DESCRIPTION OF DRAWINGS

[0021] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The detailed description is made with reference to the accompanying drawings.

[0022] FIG. 1 is a schematic structural view of a wiper according to one embodiment of the present disclosure, viewed from a first angle.

[0023] FIG. 2 is a schematic structural view of a wiper according to another embodiment of the present disclosure, viewed from a first angle.

[0024] FIG. 3A is a schematic structural view of the trajectory of the outer contour line of the wiper arm of a wiper according to one embodiment of the present disclosure.

[0025] FIG. 3B is a schematic structural view of the extension direction of the first side and the extension direction of the second side of the wiper arm of a wiper according to one embodiment of the present disclosure.

[0026] FIG. 3C is a schematic structural view of several wipers.

[0027] FIG. 4 is a schematic structural view of a wiper according to one embodiment of the present disclosure, viewed from a second angle.

[0028] FIG. 5 is a schematic structural view of a wiper according to another embodiment of the present disclosure, viewed from a second angle.

[0029] FIG. 6 is a schematic structural view of a wiper according to still another embodiment of the present disclosure.

[0030] FIG. 7 is a schematic structural view of a wiper according to still another embodiment of the present disclosure.

[0031] FIG. 8 is a schematic structural view of a wiper according to still another embodiment of the present disclosure.

[0032] FIG. 9 is a schematic structural view of a wiper according to one embodiment of the present disclosure, viewed from a first angle after the elastic part is installed.

[0033] FIG. 10 is a schematic structural view of a second angle after the elastic part of the wiper strip is installed, according to an embodiment of the present disclosure.

[0034] FIG. 11 is a schematic structural view of a third angle after the elastic part of the wiper strip is installed, according to an embodiment of the present disclosure.

[0035] Reference numerals: 10, mounting part; 11, wiper arm; 12, first clamping piece; 13, contour line of outer side of wiper arm; 14, contour line of inner side of wiper arm; 15, elastic part; 16, protrusion on elastic part; X, first axis; Y, second axis; Z, first direction; A, first circle; B, second circle; C, third circle; D, fourth circle; E, fifth circle; F, sixth circle; o, first point; a, second point; b, third point; c, fourth point; 11a, wiper arm root; 11b, wiper arm end; 111, first segment; 112, second segment. DETAILED DESCRIPTION

[0036] In the description of the present disclosure, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present disclosure.

[0037] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present disclosure, the meaning of "multiple" is two or more, unless otherwise explicitly specified and limited.

[0038] In the present disclosure, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present disclosure can be understood according to the specific circumstances.

[0039] The preferred embodiments of the present disclosure are described below with reference to the accompanying drawings, and it should be understood that the preferred embodiments described herein are only used to explain and illustrate the present disclosure, and are not used to limit the present disclosure.

[0040] The cleaning robot returns to the cleaning base station to clean the wet cleaning element after wet cleaning. At the cleaning base station, the cleaning roller rinses and scrapes the wet cleaning element on the cleaning robot, and the generated sewage falls into the cleaning disc on the cleaning base station. Then, the self-cleaning module on the cleaning base station drives the scraping strip to rotate around the hole shaft of the cleaning disc through the transmission mechanism, and pushes the sewage in the cleaning disc to move, so as to push the sewage into the sewage pool and thus to clean the cleaning disc. However, the scraping strip has low efficiency in pushing the sewage, and a large part of the sewage often remains in the cleaning disc, which is usually dried by hot air. The cleaning disc after drying often has residual dirt, and the self-cleaning effect is poor.

[0041] In a first aspect of the embodiments of the present disclosure, a scraping strip is provided, which is arranged on a cleaning base station where a cleaning robot docks. The cleaning robot can be a self-moving cleaning robot or other types of cleaning robots that meet the requirements. Specifically, the cleaning robot is a sweeping robot, the sweeping robot is provided with a wet cleaning element, and the cleaning base station corresponding to the sweeping robot is provided with a self-cleaning module, which includes a cleaning rib, a scraping strip, a cleaning disc, and a sewage tank. After the sweeping robot docks at the cleaning base station, the wet cleaning element rotates to generate friction with the cleaning rib, so that the sewage and dirt on the wet cleaning element fall into the cleaning disc below the cleaning rib. The cleaning disc is in communication with the sewage tank, and the scraping strip on the cleaning disc rotates relative to the cleaning disc to recycle the sewage and dirt on the cleaning disc into the sewage tank.

[0042] As shown in FIG. 1, according to the first aspect of the embodiments of the present disclosure, the scraping strip includes a mounting portion 10 and a scraping strip arm 11. The mounting portion 10 is rotatably connected to the cleaning disc, and the mounting portion 10 can rotate in a first direction. The scraping strip arm 11 includes a root portion and an end portion, and the root portion of the scraping strip arm 11 is connected to the mounting portion 10, so that the scraping strip arm 11 can rotate in the first direction under the drive of the mounting portion 10. The scraping strip arm 11 includes a first section 111, and the profile line on the outer side of the first section 111 is arc-shaped. The first section 111 includes a root portion and an end portion, and the root portion of the first section 111 is the root portion of the scraping strip arm 11. The extension direction of the root portion of the first section 111 along the profile line on the outer side of the first section 111 to the end portion of the first section 111 is the opposite direction of the first direction, and the first direction is the clockwise direction or the counterclockwise direction. The outer side of the scraping strip arm 11 is the side of the scraping strip arm 11 that first contacts the to-be-cleaned substance in the cleaning disc when the scraping strip arm 11 rotates in the first direction.

[0043] It can be understood that the wiper arm 11 includes a root and an end, the root of the wiper arm 11 is connected with the mounting portion 10, and the end of the wiper arm 11 extends away from the mounting portion 10. For example, in FIG. 1, the reference numeral 11a is the root of the wiper arm 11, and the reference numeral 11b is the end of the wiper arm 11.

[0044] The curvature of the contour line of the outer side of the entire wiper arm 11 can be consistent, in which case the wiper arm 11 only includes the first section 111, that is, the wiper arm 11 as a whole is the first section 111. If the contour line of the outer side of the wiper arm 11 is composed of sections with different curvatures, the wiper arm 11 includes a plurality of sections, wherein the first section 111 is the section connected with the mounting portion 10 among the plurality of sections. It can be understood that the curvatures are different, which can be different in sign, such as the curvature of the first section 111 is positive and the curvature of the second section 112 is negative; or the curvature of the first section 111 is negative and the curvature of the second section 112 is positive; or the curvatures of the three sections are positive-negative-positive or negative-positive-negative in turn. The curvatures can also be different in sign but different in magnitude.

[0045] The outer side is the side first contacting water when the wiper arm 11 rotates, and determining the outer side of the wiper arm is to determine the rotating direction of the wiper arm. For example, in FIG. 1, the reference numeral 13 is the outer side of the wiper arm 11, and the reference numeral 14 is the inner side of the wiper arm 11.

[0046] The wiper arm includes a first side and a second side, and the following is an example of how to determine which of the first side and the second side of the wiper arm is the outer side and which is the inner side. The first side and the second side of the wiper arm can be determined according to the shape of the first section of the wiper arm. It can be understood that if the first side of the wiper arm is specified, the first side and the second side of each section included in the first side are also determined. As shown in FIG. 3A, if the ac side is specified as the first side of the wiper arm, then the ab side is the first side of the first section and the bc side is the first side of the second section. Further, if the ac side is specified as the outer side of the wiper arm, then the ab side is the outer side of the first section and the bc side is the outer side of the second section.

[0047] If the wiper arm is a symmetrical figure, as shown in FIG. 8, either the first side or the second side can be the outer side.

[0048] If the blade arm is an asymmetric figure, and the extension track of the profile line of the first side of the first section has one intersection point with the outer edge of the mounting part (i.e. the extension track of the profile line of the first side is tangent to the outer edge of the mounting part) and the extension track of the profile line of the second side of the first section has two intersection points with the outer edge of the mounting part (i.e. the extension track of the profile line of the second side intersects the outer edge of the mounting part), the first side is the outer side. For example, as shown in FIG. 3A, the extension track of the profile line of the first side of the first section and the extension track of the profile line of the second side of the first section are the first circle A and the fourth circle D respectively, the first circle A is tangent to the outer edge of the mounting part, and the fourth circle D intersects the outer edge of the mounting part, so the first side corresponding to the first circle is the outer side.

[0049] If the blade arm is an asymmetric figure, and the extension track of the profile line of the first side of the first section has two intersection points with the outer edge of the mounting part (i.e. the extension track of the profile line of the first side intersects the outer edge of the mounting part) and the extension track of the profile line of the second side of the first section has two intersection points with the outer edge of the mounting part (i.e. the extension track of the profile line of the second side intersects the outer edge of the mounting part), the one having a larger segmentation ratio among the first side and the second side is the outer side. The segmentation ratio refers to that when the extension track of the profile line has two intersection points with the outer edge of the mounting part, the extension track of the profile line cuts the mounting part into two parts, and the ratio of the area of the larger part to the area of the smaller part is the segmentation ratio. As shown in FIG. 3B, the extension track of the profile line of the first side of the first section and the extension track of the profile line of the second side of the first section are the fifth circle E and the sixth circle F respectively, the fifth circle E intersects the outer edge of the mounting part, cutting the mounting part into two parts E1 and E2, wherein E1 is the smaller part and E2 is the larger part; the sixth circle F intersects the outer edge of the mounting part, cutting the mounting part into two parts F1 and F2, wherein F1 is the smaller part and F2 is the larger part. E2 / E1 is greater than F2 / F1, i.e. the segmentation ratio corresponding to the first side is greater than the segmentation ratio corresponding to the second side, so the first side is the outer side.

[0050] The outer side is the side that first contacts water when the blade arm 11 rotates, and the determination of the outer side of the blade arm determines the rotation direction of the blade arm. In FIG. 3A, it has been determined that the ac side is the outer side, if the blade arm rotates counterclockwise, the ac side first contacts water; if the blade arm rotates clockwise, the ac side contacts water later, which is contrary to the determination that the ac side is the outer side, so in FIG. 3A, the rotation direction of the blade arm is counterclockwise rather than clockwise.

[0051] In the embodiments of the present disclosure, a special blade arm shape is used, which can improve the water pushing efficiency of the blade arm. The blade arm shape needs to meet the following condition: if the rotation direction is the first direction, the extension direction of the root of the first section 111 along the profile line of the outer side of the first section 111 to the end of the first section 111 is the opposite direction of the first direction.

[0052] The rotation direction of the blade arm is clockwise or counterclockwise, and thus the extension direction of the root of the first segment 111 along the profile line of the outer side of the first segment 111 to the end of the first segment 111 needs to be counterclockwise or clockwise, that is, the profile line of the outer side of the blade arm needs to be at least arc-shaped rather than linear.

[0053] For the three shapes of the blade arm shown in FIG. 3C, the side indicated by the arrow is the outer side of the blade arm, the rotation direction of the blade arm is counterclockwise, the opposite direction of the rotation direction is clockwise, and the shape of the blade arm capable of improving the water pushing efficiency of the blade should meet the requirement that the extension direction of the root of the first segment 111 along the profile line of the outer side of the first segment 111 to the end of the first segment 111 is clockwise. For the left blade arm, the extension direction of the root of the first segment 111 along the profile line of the outer side of the first segment 111 to the end of the first segment 111 is a straight line rather than clockwise. For the middle blade arm, the extension direction of the root of the first segment 111 along the profile line of the outer side of the first segment 111 to the end of the first segment 111 is clockwise. For the right blade arm, the extension direction of the root of the first segment 111 along the profile line of the outer side of the first segment 111 to the end of the first segment 111 is counterclockwise rather than clockwise. Therefore, among the three blade arms shown in FIG. 3C, only the shape of the middle blade arm meets the requirement of the embodiment of the present disclosure.

[0054] It can be understood that in FIG. 1, the blade is approximately “6”-shaped, the direction indicated by the arrow on the profile line of the outer side of the first segment 111 is the extension direction of the root of the first segment 111 along the profile line of the outer side of the first segment 111 to the end of the first segment 111, and when the blade rotates in the cleaning disc, the convex part of the arc-shaped profile line of the first segment 111 first contacts the material to be cleaned.

[0055] It can be understood that the profile line of the outer side of the first segment 111 is arc-shaped, which theoretically means that the outer side of the first segment 111 is a surface, that is, the outer side surface of the first segment 111, but the blade arm 11 is relatively thin and has small thickness, and the description here ignores the thickness of the blade arm 11.

[0056] In some examples, the blade arm 11 and the mounting portion 10 can be integrally formed, or can be separately formed and then assembled together by connection, adhesion or the like.

[0057] The scraping strip provided by the embodiments of the present disclosure comprises a mounting portion 10 and a scraping arm 11. The mounting portion 10 is capable of rotating relative to the cleaning disc along a first direction, thereby driving the scraping arm 11 connected with the mounting portion 10 to rotate synchronously along the first direction. Through the rotation of the scraping arm 11, the sewage on the cleaning disc is pushed to move, and the cleaning disc is scraped and cleaned. By making the contour line on the outer side of the arc-shaped first segment 111 protrude along the first direction, the water is pushed away from the center of the mounting portion 10 by the first segment 111 when the scraping arm 11 pushes the sewage, which can prevent the sewage from gathering at the position of the mounting portion 10 during the cleaning process of the scraping strip. By continuously pushing the water outward by the arc-shaped first segment 111, the water pushing efficiency and effect of the scraping strip are improved, and the sewage can be quickly pushed to the edge of the cleaning disc and flow down, so as to effectively scrape and clean the cleaning disc, reduce the water stain residue on the cleaning disc, and improve the cleanliness of the cleaning disc.

[0058] As shown in FIG. 1, in an embodiment, the included angle between the normal vector of the midpoint of the arc and the first ray is obtuse; the first ray is a ray from the center point of the mounting portion 10 to the outer side point of the end of the first segment 111.

[0059] The normal vector is a normal vector pointing to the center of the circle where the arc is located. In this embodiment, the included angle between the normal vector and the first ray is obtuse, and the first ray is a ray from the center point of the mounting portion 10 to the outer side point of the end of the first segment 111. That is, the contour line on the outer side of the first segment 111 is an arc protruding away from the mounting portion 10. The arc-shaped first segment 111 can guide the water droplets remaining on the scraping arm 11, accelerate the water droplets on the scraping arm 11 to spin out, remove the water droplets remaining on the scraping arm 11, improve the cleanliness of the scraping arm 11 itself, and further improve the cleanliness of the entire scraping strip.

[0060] It can be understood that the outer side point of the end of the first segment 111 is the intersection point of the end of the first segment 111 and the contour line on the outer side of the first segment 111. The arc is the outer side of the first segment 111, and the normal vector of the midpoint of the arc is a normal vector from the geometric center of the outer side of the first segment 111. The normal vector forms an obtuse angle α with the first ray as shown in FIG. 1. For simplicity, the end of the first segment 111 is simplified as a plane. If further simplified without considering the thickness of the scraping strip, the end of the first segment 111 can be simplified as a line segment, which has two end points. One of the end points is the intersection point of the line segment and the contour line on the outer side of the first segment 111 (i.e., the line segment intersects with the contour line on the outer side of the first segment 111 at the end point), which is the outer side point of the end of the first segment 111.

[0061] As shown in FIG. 2, in an embodiment, the scraping arm 11 further comprises a second section 112, the second section 112 comprises a root and an end, the root of the second section 112 is smoothly connected with the end of the first section 111, the root of the second section 112 is connected with the end of the first section 111; the profile line of the outer side of the second section 112 is arc-shaped, and the extension direction of the root of the second section 112 along the profile line of the outer side of the second section 112 to the end of the second section 112 is the same as the first direction.

[0062] In this embodiment, the root of the second section 112 is connected with the end of the first section 111, and the arc-shaped second section 112 protrudes away from the first direction (i.e. in the direction opposite to the first direction), when the scraping arm 11 scrapes the washing plate, the first section 111 first pushes the sewage on the washing plate outward, when the sewage reaches the second section 112, the rotation of the second section 112 provides an outward throwing force to the sewage passing through the second section 112, so as to quickly throw out the sewage. Through the cooperation of the first section 111 for pushing water and the second section 112 for throwing water, the possibility of sewage flowing back to the position where the mounting portion 10 is located is further reduced, so as to further improve the cleaning efficiency and cleaning effect of the scraping strip.

[0063] In this embodiment, the scraping arm 11 is composed of the first section 111 and the second section 112, and the first section 111 and the second section 112 are smoothly connected. In some embodiments, the profile line of the outer side of the first section 111 and the profile line of the outer side of the second section 112 intersect at a W point, and the derivative of the profile line of the outer side of the first section 111 at the W point and the derivative of the profile line of the outer side of the second section 112 at the W point are the same in size, that is, the profile line of the outer side of the first section 111 and the profile line of the outer side of the second section 112 are first-order continuous. On this basis, the second-order derivative of the profile line of the outer side of the first section 111 at the W point and the second-order derivative of the profile line of the outer side of the second section 112 at the W point are the same in size, that is, the profile line of the outer side of the first section 111 and the profile line of the outer side of the second section 112 are second-order continuous. The end of the first section 111 and the root of the second section 112 are connected at the W point.

[0064] In some embodiments, the second section 112 and the first section 111 have opposite curvature signs, for example, the curvature of the first section 111 is positive, and the curvature of the second section 112 is negative, or the curvature of the first section 111 is negative, and the curvature of the second section 112 is positive, so that the protruding direction of the arc-shaped profile line of the outer side of the second section 112 is opposite to the protruding direction of the arc-shaped profile line of the outer side of the first section 111.

[0065] Further, the profile line of the outer side of the second section 112 is arc-shaped, which can be a circular arc, an elliptical arc or a parabolic arc.

[0066] It can be understood that the contour line of the outer side of the second section 112 is arc-shaped, and theoretically, the outer side of the second section 112 is a surface, that is, the outer side surface of the second section 112, but the thickness of the wiper arm 11 is relatively thin, and the description herein ignores the thickness of the wiper arm 11. For the sake of simplicity, the end of the second section 112 is simplified as a surface, and if further simplified without considering the thickness of the wiper, the end of the second section 112 can be simplified as a line segment, which has two end points, one of which is the intersection point of the line segment and the contour line of the outer side of the second section 112 (that is, the line segment intersects with the contour line of the outer side of the second section 112 at the end point), and the other of which is the intersection point of the line segment and the contour line of the inner side of the second section 112 (that is, the line segment intersects with the contour line of the inner side of the second section 112 at the other end point).

[0067] It can be understood that, as shown in FIG. 2, the arrow on the contour line of the outer side of the second section 112 indicates the direction of the extension of the root of the second section 112 along the contour line of the outer side of the second section 112 to the end of the second section 112, and the part where the arc-shaped outer contour line of the second section 112 meets the arc-shaped outer contour line of the first section 111 first contacts the to-be-cleaned substance.

[0068] As shown in FIGS. 1 and 2, in an embodiment, the contour line of the outer side of the region where the root of the wiper arm 11 is located is smoothly connected with the outer edge of the mounting portion 10.

[0069] In this embodiment, the contour line of the outer side of the region where the root of the wiper arm 11 is located is smoothly connected with the outer edge of the mounting portion 10, which reduces the dead angle at the joint between the wiper arm 11 and the mounting portion 10, and makes the line at the joint between the wiper arm 11 and the mounting portion 10 smooth, thereby reducing the possibility of water accumulation at the mounting portion 10 on the cleaning tray.

[0070] In some examples, when the mounting portion 10 is a polygonal structure, the contour line of the outer side of the root of the wiper arm 11 extends along one side edge of the mounting portion 10 to ensure that there is no water accumulation dead angle between the mounting portion 10 and the contour line of the outer side of the root of the wiper arm 11.

[0071] As shown in FIGS. 1 and 2, in an embodiment, the contour line of the outer side of the first section 111 is circular arc-shaped, the mounting portion 10 is disc-shaped, and the contour line of the outer side of the region where the root of the wiper arm 11 is located is inscribed in the outer edge of the mounting portion 10.

[0072] In this embodiment, the contour line of the outer side of the root of the wiper arm 11 is inscribed in the outer edge of the mounting portion 10, which can ensure that the contour line of the outer side of the wiper is smooth, reduce the water stains remaining on the wiper itself, and improve the self-cleaning ability and self-cleaning effect of the wiper as a whole.

[0073] In this embodiment, the mounting portion 10 is disc-shaped, which can uniformly disperse the forces in all directions when the mounting portion 10 rotates, and can make the mounting portion 10 rotate more smoothly, thereby improving the stability of the entire wiper blade, and improving the durability and service life of the wiper blade. In addition, the disc-shaped mounting portion 10 and the outer edge of the profile of the first section 111 are smooth, and have few dead angles, which can help maintain the cleanliness of the wiper blade.

[0074] Further, the profile of the outer side of the root of the wiper blade arm 11 is a circular arc, and the mounting portion 10 is a disc, and the circumference of the circular arc is inscribed in the circumference of the disc. In FIG. 3A, the circumference of the outer edge of the mounting portion 10 is inscribed in the circumference of the circular arc, and a tangent point a is formed on the outer edge of the mounting portion 10.

[0075] Next, an example of how to determine the profile of the outer side of the first section is described. As shown in FIG. 3A, in one embodiment, two straight lines passing through the center point of the mounting portion and perpendicular to each other are taken as a first axis and a second axis, the center point of the mounting portion is taken as a first point, the intersection of the outer edge of the mounting portion and the first axis is taken as a second point, and a target point on the first axis and on the opposite side of the second point with respect to the second axis is taken as the center of a first circle, and the distance between the target point and the second point is taken as the radius of the first circle. The intersection of the first circle and the second axis is a third point, and the profile of the outer side of the first section is a circular arc between the second point and the third point on the first circle. The outer side point of the end of the first section is the intersection of the end of the first section and the profile of the outer side of the first section.

[0076] This embodiment is intended to illustrate how to determine the profile of the outer side of the first section 111. The mounting portion 10 is disc-shaped, and first defines a first axis and a second axis passing through the center point of the mounting portion 10 and perpendicular to each other, the first axis is the X-axis direction, and the second axis is the Y direction. The center point of the mounting portion is taken as a first point, the intersection of the outer edge of the mounting portion and the first axis is taken as a second point, and a first target point on the first axis and on the opposite side of the second point with respect to the second axis is taken as the center of a first circle A, and the distance between the first target point and the second point is taken as the radius of the first circle A. The first circle A and the outer edge of the mounting portion are inscribed at the second point, the first circle is the larger circle of the two inscribed circles, and the outer edge of the mounting portion is the smaller circle of the two inscribed circles. The distance between the first target point and the center point of the mounting portion 10 affects the curvature of the profile of the outer side of the first section, that is, the first target point is determined according to the required curvature of the profile of the outer side of the first section. It can be understood that the first target point needs to be on the opposite side of the second point with respect to the second axis, if it is on the same side, the first circle is the smaller circle of the two inscribed circles. After the first circle is determined, the intersection of the first circle and the second axis can be taken as a third point (in some embodiments, the intersection of the first circle and the positive half axis of the second axis can be taken as the third point), and the circular arc between the second point and the third point on the first circle can be taken as the profile of the outer side of the first section 111.

[0077] As shown in FIG. 3A, in an embodiment, the wiper arm 11 further comprises a second section 112, the second section 112 comprises a root and an end, the root of the second section 112 is smoothly connected with the end of the first section 111; the profile line of the outer side of the second section 112 is an arc, the root of the second section 112 extends along the profile line of the outer side of the second section 112 to the end of the second section 112 in the same direction as the first direction; a circle with the end of the second section 112 as the center and the outer side point of the end of the second section 112 as the radius is a second circle; a circle passing through the third point and tangent to the first circle is a third circle, one intersection point of the third circle and the second circle is a fourth point; the outer side point of the end of the second section 112 is the intersection point of the end of the second section 112 and the profile line of the outer side of the second section 112; the profile line of the outer side of the second section 112 is the arc between the third point and the fourth point on the third circle.

[0078] The embodiment aims to explain how to determine the profile line of the outer side of the second section 112. The radius of the second circle B can be determined according to the distance from the desired end of the second section 112 (in fact, the end is a surface, if the thickness of the wiper is not considered, the end is a line, which is simplified as a point here) to the center point of the mounting portion 10. It can be understood that the wiper rotates in the cleaning tray with the center of the mounting portion 10 as the rotation center, and the radius of the second circle should match the size of the cleaning tray. If the radius of the second circle B is too large, the wiper is too long, and the wiper arm 11 will hit the side wall of the cleaning tray during rotation. If the radius of the second circle B is too small, the wiper is too short, and the part of the cleaning tray with a distance greater than the radius of the second circle from the center of the mounting portion 10 cannot be cleaned by the wiper during rotation. Therefore, the distance from the end of the second section 112 to the center point of the mounting portion 10, i.e., the radius of the second circle, can be determined according to the size of the cleaning tray.

[0079] A circle passing through the third point b and tangent to the first circle A is a third circle C, and the specific determination method of the third circle C is that a second target point is determined on the extension line of the line between the center of the first circle and the third point b, a circle is drawn with the distance between the second target point and the third point as the radius, and the first circle A is obtained, which is the tangent circle of the first circle A, i.e., the third circle C. It can be understood that the second target point can be determined according to the required arc of the profile line of the outer side of the second section. The third circle C and the second circle B have two intersection points: the intersection point c of the part of the third circle C extending along the direction of the end of the first section 111 and the second circle B, and the intersection point d of the part of the third circle C extending away from the direction of the end of the first section 111 and the second circle B, and the profile line of the outer side of the second section 112 is the arc between the third point b and the fourth point on the third circle. It is obviously not suitable to take the intersection point d as the fourth point, because the inferior arc and the superior arc between the third point b and the intersection point d cannot be smoothly connected with the arc ab, or the bending is too much to easily accumulate water, so the intersection point c is taken as the fourth point.

[0080] As shown in FIG. 2 and FIG. 3A, in an embodiment, the junction of the profile line of the outer side of the second section 112 and the profile line of the outer side of the first section 111 is a third point b, which is located on the second axis, the definitions of the first axis and the second axis are described above and will not be repeated.

[0081] In this embodiment, the junction of the profile line of the outer side of the second section 112 and the profile line of the outer side of the first section 111 is located on the second axis, to ensure the water pushing effect of the first section 111, to ensure that the water on the wiper strip can be smoothly pushed out to the second section 112 by the first section 111, so that the subsequent water throwing process of the second section 112 and the water pushing process of the first section 111 can be coordinated and smooth, which helps to improve the overall cleaning effect of the wiper strip and improve the overall cleanliness of the wiper strip.

[0082] As shown in FIG. 2, in an embodiment, the projection length ratio of the profile line of the outer side of the second section 112 and the profile line of the outer side of the wiper arm 11 on the second axis is 1:4-1:6, preferably 1:5.

[0083] The present inventors have proved through a large number of experiments that the first section 111 for water pushing and the second section 112 for water throwing have the best cooperation in water pushing and water throwing, the wiper strip has the best cleaning efficiency, and has the structural stability and rotation stability.

[0084] As shown in FIG. 1 to FIG. 8, in an embodiment, the profile line of the inner side of the wiper arm 11 is a straight line, or the profile line of the inner side of the wiper arm 11 is arc-shaped, the curvature of the profile line of the inner side of the wiper arm 11 is not greater than the curvature of the profile line of the outer side of the wiper arm 11; or the profile line of the inner side of the wiper arm 11 is arc-shaped, and the wiper arm 11 is an axisymmetric figure, the profile line of the inner side of the wiper arm 11 and the profile line of the outer side of the wiper arm 11 are symmetric with respect to the symmetry axis of the wiper arm 11. The inner side of the wiper arm 11 is the side of the wiper arm 11 which contacts the substance to be cleaned in the cleaning tray after the wiper arm 11 rotates in the first direction.

[0085] In this embodiment, the profile line of the inner side of the wiper arm 11 has various situations. The inner side of the wiper arm 11 is the side of the wiper arm 11 which contacts the substance to be cleaned in the cleaning tray after the wiper arm 11 rotates. The outer side of the wiper arm 11 is mainly used for water pushing and water throwing, and the profile line of the outer side has a greater impact on the cleaning efficiency. Therefore, under the condition that the profile line of the outer side is determined, the profile line of the inner side can have various designs.

[0086] In this embodiment, as shown in FIGS. 6 and 7, the profile line of the inner side of the blade arm 11 is a straight line or the profile line of the inner side of the blade arm 11 is arc-shaped and the curvature of the profile line of the inner side of the blade arm 11 is not greater than the curvature of the profile line of the outer side of the blade arm 11. In both cases, the profile line of the outer side of the blade arm 11 is unchanged, and the profile line of the inner side is adjusted to form a blade with different width and shape. The size and shape of the profile line of the inner side can be selected according to the ease of manufacturing and processing, the contact area with the cleaning tray, whether the blade itself is easy to store water, whether it has sufficient strength and rotation stability, and other factors.

[0087] In this embodiment, as shown in FIG. 8, the blade arm 11 is an axisymmetric figure, and the profile line of the inner side of the blade arm 11 and the profile line of the outer side of the blade arm 11 are symmetrical with respect to the axis of symmetry of the blade arm 11. In the case where two blades are respectively installed in two cleaning trays and the two cleaning trays share one sewage tank, the symmetrical structure of the blade arm 11 allows the blades of the left and right cleaning trays to be mixed, so that the correspondence between the blade and the left and right cleaning trays does not need to be considered when assembling the blade, which is beneficial to improve the assembly efficiency.

[0088] As shown in FIGS. 9 and 10, in one embodiment, the blade further comprises: an elastic portion 15, which wraps the profile line of the outer side of the blade arm 11 and the profile line of the inner side of the blade arm 11, and the lower edge of the elastic portion 15 is lower than the lower edge of the blade arm 11, so that when the blade arm 11 rotates in the first direction, the lower edge of the elastic portion 15 contacts the bottom of the cleaning tray; and / or the elastic portion 15 protrudes from the end of the blade arm 11 along the profile line of the outer side of the blade arm 11 and the profile line of the inner side of the blade arm 11, so that the elastic portion 15 and the side surface of the cleaning tray are in interference fit. The inner side of the blade arm 11 is the side of the blade arm 11 that first contacts the substance to be cleaned in the cleaning tray when the blade arm 11 rotates.

[0089] It can be understood that the blade arm has a certain thickness, but the part in contact with the cleaning tray is the lower edge, and the elastic portion 15 can cover the entire outer side and the entire inner side of the blade arm 11, or only cover the lower edge of the outer side and the lower edge of the inner side.

[0090] In this embodiment, the elastic part 15 is wrapped outside the profile line of the outer side of the blade arm 11 and the profile line of the inner side of the blade arm 11, the lower edge of the elastic part 15 is lower than the lower edge of the blade arm 11, and when the blade arm 11 rotates in the first direction, the elastic part 15 contacts the bottom of the washing tray to make the blade arm 11 and the blade of the washing tray in interference fit; the elastic part 15 protrudes from the end of the blade arm 11 along the profile line of the outer side of the blade arm 11 and the profile line of the inner side of the blade arm 11, so that the elastic part 15 and the side of the washing tray are in interference fit, so that the elastic part 15 is elastically deformed when it contacts the bottom and side of the washing tray, ensuring that the blade arm 11 and the blade of the washing tray are in full contact, which not only ensures the water scraping effect of the blade arm 11, but also avoids damage to the structure and prolongs the service life of the self-cleaning module. In addition, when the two blade arms 11 in the two washing trays interfere with each other, the elastic part 15 can prevent the blade arm 11 from being damaged.

[0091] Further, the elastic part 15 includes two, one of which is wrapped around the left side of the blade arm 11 and extends out of the end of the blade arm 11 along the length direction of the blade arm 11 in FIG. 9, and the other of which is wrapped around the right side of the blade arm 11 and extends out of the end of the blade arm 11 along the length direction of the blade arm 11.

[0092] It can be understood that the lower edge of the blade arm 11 is not higher than the lower edge of the mounting part 10. In FIG. 11, the lower edge of the elastic part 15 is lower than the lower edge of the blade arm 11 and the lower edge of the mounting part 10, so as to ensure that the elastic part 15 and the bottom of the washing tray are in flexible contact, reduce the gap between the blade arm 11 and the washing tray, and improve the water scraping effect of the blade arm 11.

[0093] As shown in FIG. 10, in an embodiment, a protrusion 16 is arranged at the lower edge of the elastic part 15, and the protrusion contacts the bottom of the washing tray.

[0094] In this embodiment, the protrusion 16 is arranged at the lower edge of the elastic part 15, and the protrusion 16 contacts the bottom of the washing tray, so that the protrusion 16 and the elastic part 15 form a flow guide cavity, so that the sewage can flow out of the blade smoothly under the flow guide of the flow guide cavity, prevent the sewage from gathering between the two elastic parts 15 of the blade arm 11, and prevent water accumulation inside the blade.

[0095] Further, the protrusion 16 is arranged at the lower edge of the side of the elastic part 15, and the lowest part of the lower edge of the protrusion 16 is not lower than the lower edge of the elastic part 15, so as to ensure that the elastic part 15 and the bottom of the washing tray are in full contact and scrape the sewage.

[0096] In an embodiment, a bayonet is arranged on the blade arm 11, and a protruding part is arranged on the elastic part 15, the protruding part is inserted into the bayonet, and the elastic part 15 is fixed to the blade arm 11.

[0097] In the embodiment, the scraping strip arm 11 is provided with a bayonet, and the elastic part 15 is provided with a protruding part which is inserted into the bayonet to connect the elastic part 15 and the scraping strip arm 11 in a plug-in manner. When the elastic part 15 needs to be cleaned or is severely deformed, the elastic part 15 and the scraping strip arm 11 can be quickly disassembled and replaced, which is simple and fast.

[0098] As shown in FIGS. 4 and 5, in an embodiment, the cleaning disc is provided with a boss, the boss is provided with a through hole, a rotating member for driving the mounting part 10 to rotate is inserted into the through hole, and the bottle cap-shaped mounting part 10 is buckled on the boss. The top wall of the mounting part 10 is provided with a first clamping part 12 on the surface facing the surface of the boss. The first clamping part 12 is clamped with a second clamping part on the rotating member, so that the rotating member can drive the mounting part 10 to rotate when the rotating member rotates. At the same time, the mounting part 10 is clamped and connected with the rotating member, which facilitates the disassembly and replacement of the mounting part 10, so as to regularly maintain the cleaning disc and the scraping strip, prevent dirt from accumulating on the cleaning disc and the scraping strip, and prevent bacteria from being generated, so as to ensure the cleanliness of the cleaning disc and the scraping strip.

[0099] In the embodiment, the rotating member for driving the mounting part 10 to rotate is connected with the driving device and extends out of the through hole of the boss after the connection. The mounting part 10 is buckled on the boss to position the mounting part 10 by the boss. The mounting part 10 is clamped and fixed with the second clamping part on the rotating member through the first clamping part 12, so that the mounting part 10 is stably connected with the rotating member. Thus, the mounting part 10 can rotate relative to the cleaning disc along the first direction under the driving of the rotating member, and the sewage on the cleaning disc is scraped.

[0100] In an embodiment, the cleaning disc is communicated with a sewage tank, and the rotating path of the scraping strip arm 11 in the cleaning disc covers at least part of the area of the sewage tank. When the scraping strip arm 11 rotates along the first direction, the scraping strip arm 11 pushes the material to be cleaned in the cleaning disc to the sewage tank.

[0101] In the embodiment, the cleaning disc is further provided with a sewage tank, and the rotating path of the scraping strip arm 11 covers at least part of the area of the sewage tank. The sewage in the cleaning disc is pushed to the sewage tank and then discharged by the scraping strip arm 11 rotating along the first direction, so as to realize the centralized treatment of the scraped sewage, thereby realizing the self-cleaning of the cleaning base station.

[0102] According to a second aspect of the present disclosure, a cleaning base station is provided, which comprises a shell, a scraping strip, a cleaning disc and a sewage tank provided on the shell, a mounting part provided in the cleaning disc in a rotatable manner, the mounting part being used to drive the scraping strip arm to rotate around the center point of the mounting part, and the mounting part being used to push the material to be cleaned in the cleaning disc to the sewage tank, and the sewage tank being located on the rotating path of the scraping strip arm.

[0103] In some embodiments, the cleaning base station can include a first wiper strip and a second wiper strip, the second wiper strip being a symmetric wiper strip of the first wiper strip; a first direction of the first wiper strip being opposite to a first direction of the second wiper strip, one being clockwise and the other being counterclockwise.

[0104] The cleaning base station provided by the embodiments of the present disclosure has all the beneficial effects of the wiper strips of the above embodiments, and the specific beneficial effects are as follows.

[0105] Compared with the prior art, the wiper strip and the cleaning base station have the beneficial effect that, taking sewage as an example of the material to be cleaned, the embodiments of the present disclosure use a wiper strip arm with a special shape, including an arc-shaped outer contour line, and rotate the wiper strip arm towards a direction matching the arc shape, so that the wiper strip arm can push the sewage away from the center point of the mounting portion when rotating, prevent the sewage from gathering at the position of the mounting portion, effectively improve the water pushing efficiency of the wiper strip, and thus improve the self-cleaning efficiency of the cleaning base station.

[0106] It is easy for those skilled in the art to understand that the above advantageous modes can be freely combined and superimposed without conflict.

[0107] The above is only a preferred embodiment of the present disclosure, and is not intended to limit the present disclosure. Any modification, equivalent replacement and improvement made within the spirit and principle of the present disclosure shall be included in the protection scope of the present disclosure. The above is only a preferred embodiment of the present disclosure, and it should be pointed out that, for ordinary skilled in the art, without departing from the technical principles of the present disclosure, a number of improvements and modifications can be made, and these improvements and modifications should be considered as the protection scope of the present disclosure.

Claims

1. A doctor blade, characterized in that, The scraping strip comprises: a mounting portion for rotatably connecting to the cleaning disc, the mounting portion being rotatable in a first direction; and a scraping strip arm comprising a root portion and an end portion, the root portion of the scraping strip arm being connected to the mounting portion so that the scraping strip arm is rotatable in the first direction under the driving of the mounting portion; wherein the scraping strip arm comprises a first segment, an outline of an outer side of the first segment being arc-shaped, the first segment comprising a root portion and an end portion, the root portion of the first segment being the root portion of the scraping strip arm; wherein an extension direction of the root portion of the first segment along the outline of the outer side of the first segment to the end portion of the first segment is an opposite direction of the first direction; the first direction is a clockwise direction or an anticlockwise direction; the outer side of the scraping strip arm is a side of the scraping strip arm that is first contacted with a substance to be cleaned in the cleaning disc when the scraping strip arm is rotated in the first direction.

2. The wiper strip of claim 1, wherein The scraping strip arm comprises a first side and a second side, if the scraping strip arm is a symmetrical figure, the first side or the second side is the outer side of the scraping strip arm; if the scraping strip arm is an asymmetrical figure, an extension track of the outline of the first side of the first segment has one intersection point with an outer edge of the mounting portion and an extension track of the outline of the second side of the first segment has two intersection points with the outer edge of the mounting portion, the first side is the outer side of the scraping strip arm; and if the scraping strip arm is an asymmetrical figure, an extension track of the outline of the first side of the first segment has two intersection points with the outer edge of the mounting portion and an extension track of the outline of the second side of the first segment has two intersection points with the outer edge of the mounting portion, one of the first side and the second side having a larger segmentation ratio is the outer side of the scraping strip arm; wherein the extension track of the outline of a side of the scraping strip arm cuts the mounting portion into two parts, and the ratio of the area of the larger part to the area of the smaller part is the segmentation ratio corresponding to the side.

3. The scraping strip according to claim 1 or 2, wherein an angle between a normal vector of the arc-shaped portion passing through a midpoint of the arc-shaped portion and a first ray is an obtuse angle; the first ray is a ray from a center point of the mounting portion to an outer side point of the end portion of the first segment.

4. The scraping strip according to any one of claims 1-3, wherein the scraping strip arm further comprises a second segment, the second segment comprising a root portion and an end portion, the root portion of the second segment being smoothly connected to the end portion of the first segment, and the root portion of the second segment being connected to the end portion of the first segment; and an outline of an outer side of the second segment is arc-shaped, and an extension direction of the root portion of the second segment along the outline of the outer side of the second segment to the end portion of the second segment is the same as the first direction.

5. The scraping strip according to any one of claims 1-3, wherein the outline of the outer side of the first segment is circular arc-shaped, the mounting portion is disc-shaped, and the outline of the outer side of the first segment is arranged to be inscribed in the outer edge of the mounting portion.

6. The scraping strip according to claim 5, wherein ​ A first circle is determined with the center point of the mounting portion as a first point, the intersection of the outer edge of the mounting portion and the first axis as a second point, and the first target point on the first axis and on the opposite side of the second point from the second axis as a center, and the distance from the first target point to the second point as a radius; the intersection of the first circle and the second axis is a third point; the profile line on the outer side of the first section is an arc on the first circle between the second point and the third point; and the outer side point of the end of the first section is the intersection of the end of the first section and the profile line on the outer side of the first section.

7. The wiper strip according to claim 6, wherein the wiper strip arm further comprises a second section, the second section comprising a root and an end, the root of the second section smoothly transitions with the end of the first section, and the root of the second section is connected with the end of the first section; the profile line on the outer side of the second section is arc-shaped, and the extension direction of the root of the second section along the profile line on the outer side of the second section to the end of the second section is the same as the first direction; and the intersection of the profile line on the outer side of the second section and the profile line on the outer side of the first section is located on the second axis.

8. The wiper strip according to claim 6, wherein the wiper strip arm further comprises a second section, the second section comprising a root and an end, the root of the second section smoothly transitions with the end of the first section, and the root of the second section is connected with the end of the first section; the profile line on the outer side of the second section is arc-shaped, and the extension direction of the root of the second section along the profile line on the outer side of the second section to the end of the second section is the same as the first direction; a second circle is a circle with the first point as a center and the distance from the outer side point of the end of the second section to the first point as a radius; a third circle is a circle passing through the third point and externally tangent to the first circle; one intersection of the third circle and the second circle is a fourth point; the outer side point of the end of the second section is the intersection of the end of the second section and the profile line on the outer side of the second section; and the profile line on the outer side of the second section is an arc on the third circle between the third point and the fourth point.

9. The wiper strip according to claim 7 or 8, wherein the projection length ratio of the profile line on the outer side of the second section and the profile line on the outer side of the wiper strip arm on the second axis is 1:4-1:

6.

10. The wiper strip according to any one of claims 1-9, wherein the profile line on the inner side of the wiper strip arm is a straight line, or the profile line on the inner side of the wiper strip arm is arc-shaped, and the curvature of the profile line on the inner side of the wiper strip arm is not greater than the curvature of the profile line on the outer side of the wiper strip arm; or the profile line on the inner side of the wiper strip arm is arc-shaped, and the wiper strip arm is an axisymmetric figure, and the profile line on the inner side of the wiper strip arm and the profile line on the outer side of the wiper strip arm are symmetric with respect to the axis of symmetry of the wiper strip arm. The inner side of the blade arm is the side of the blade arm that can contact the substance to be cleaned in the cleaning tray when the blade arm rotates in the first direction.

11. The wiper strip according to any one of claims 1-10, characterized in that The blade further comprises: a resilient portion that wraps around the contour of the outer side of the blade arm and the contour of the inner side of the blade arm; wherein the lower edge of the resilient portion is lower than the lower edge of the blade arm, so that the lower edge of the resilient portion can contact the bottom of the cleaning tray when the blade arm rotates in the first direction; and / or the resilient portion protrudes from the end of the blade arm along the contour of the outer side of the blade arm and the contour of the inner side of the blade arm, so that the resilient portion can be in interference fit with the side of the cleaning tray; The inner side of the blade arm is the side of the blade arm that can contact the substance to be cleaned in the cleaning tray when the blade arm rotates in the first direction.

12. The blade according to claim 11, wherein a protrusion is provided at the lower edge of the resilient portion, and the protrusion can contact the bottom of the cleaning tray.

13. The blade according to claim 11 or 12, wherein a bayonet is provided on the blade arm, and a protruding portion is provided on the resilient portion, the protruding portion is inserted into the bayonet, so that the resilient portion is fixed to the blade arm.

14. A cleaning base station, characterized by, comprises: a housing, the housing is provided with a cleaning tray and a sewage tank; and the blade according to any one of claims 1 to 13; wherein the mounting portion is rotatably arranged in the cleaning tray, the mounting portion is used to drive the blade arm to rotate around the center point of the mounting portion, so as to push the substance to be cleaned in the cleaning tray to the sewage tank; the sewage tank is located on the rotating path of the blade arm.

Images