Scraping strip and cleaning base station

Abstract

The utility model provides a scraping strip and a cleaning base station, and belongs to the technical field of cleaning scraping strips. According to the scraping strip, the to-be-cleaned substance is taken as sewage, the scraping strip arm which is of a special shape and comprises the first section with the arc-shaped outer contour line is used, the scraping strip arm rotates in the direction matched with the arc shape, and when the scraping strip arm rotates, the sewage can be pushed away in the direction away from the center point of the mounting part; sewage is prevented from gathering towards the position where the mounting part is located, the water pushing efficiency of the scraping strip is effectively improved, and the self-cleaning efficiency of the cleaning robot is improved.

Description

Technical Field

[0001] The present application belongs to the technical field of cleaning scraper strips, and in particular relates to a scraper strip and a cleaning base station. Background Art

[0002] After wet cleaning, the robot returns to the cleaning base station to clean the wet cleaning parts. At the cleaning base station, the cleaning rollers rinse and scrape the robot's wet cleaning parts, leaving wastewater that falls into the cleaning tray on the base station. The self-cleaning module on the cleaning base station then drives the scraper bar through a transmission mechanism to rotate around the cleaning tray's hole axis, pushing the wastewater inside the tray into the sewage pool, thereby self-cleaning the tray. Existing scraper bars are inefficient at pushing wastewater, often leaving a significant amount of wastewater on the tray. This dirty water is then typically dried with hot air, leaving dirt on the tray after drying, resulting in poor self-cleaning effectiveness. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art or related technologies.

[0004] To this end, a first aspect of the present invention provides a scraper strip.

[0005] A second aspect of the present invention provides a cleaning base station.

[0006] In view of this, according to a first aspect of an embodiment of the present application, a scraper strip is provided, comprising:

[0007] A mounting portion rotatably connected to the cleaning disc, the mounting portion being capable of rotating in a first direction;

[0008] The scraper arm includes a root portion and an end portion, wherein the root portion of the scraper arm is connected to the mounting portion so that the scraper arm can rotate in a first direction driven by the mounting portion;

[0009] The scraper arm includes a first section, the outer contour line of the first section is arc-shaped, the first section includes a root and an end, and the root of the first section is the root of the scraper arm;

[0010] Among them, the extension direction of the root of the first section along the contour line of the outer side of the first section toward the end of the first section is opposite to the first direction; the first direction is clockwise or counterclockwise; the outer side of the scraper arm is the side that the scraper arm first contacts with the material to be cleaned in the cleaning disc when the scraper arm rotates toward the first direction.

[0011] In a possible embodiment, the scraper arm includes a first side and a second side.

[0012] If the scraper arm is a symmetrical shape, the first side or the second side is the outer side of the scraper arm;

[0013] If the scraper arm is an asymmetrical shape, and the extension trajectory of the contour line of the first side of the first section intersects the outer edge of the mounting portion at one point, and the extension trajectory of the contour line of the second side of the first section intersects the outer edge of the mounting portion at two points, then the first side is the outer side of the scraper arm;

[0014] If the scraper arm is an asymmetric shape, and the extension trajectory of the contour line of the first side of the first section has two intersections with the outer edge of the mounting portion, and the extension trajectory of the contour line of the second side of the first section has two intersections with the outer edge of the mounting portion, then the side with a larger corresponding division ratio is the outer side of the scraper arm; wherein, the extension trajectory of the contour line on one side of the scraper arm cuts the mounting portion into two parts, and the ratio of the area of ​​the larger part to the smaller part of the two parts is the division ratio corresponding to that side.

[0015] In a feasible embodiment, the angle between the positive normal vector of the arc passing through the midpoint of the arc and the first ray is an obtuse angle; the first ray is a ray pointing from the center point of the mounting portion to the outer point of the end of the first section.

[0016] In a feasible embodiment, the scraper arm further includes a second section, the second section includes 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;

[0017] The outer contour line of the second segment is arc-shaped, and the extension direction of the root of the second segment along the outer contour line of the second segment toward the end of the second segment is the same as the first direction.

[0018] In a feasible embodiment, the outer contour line of the first section is arc-shaped, the mounting portion is disc-shaped, and the outer contour line of the first section is inscribed in the outer edge of the mounting portion.

[0019] In a feasible embodiment, two straight lines passing through the center point of the mounting portion and perpendicular to each other are used as the first axis and the second axis, the center point of the mounting portion is used as the first point, the intersection of the outer edge of the mounting portion and the first axis is used as the second point, the first target point on the first axis that is on the opposite side of the second axis as the second point is used as the center of the circle, and the distance from the first target point to the second point is used as the radius to determine the first circle; the intersection of the first circle and the second axis is used as the third point; the outer contour line of the first segment is the arc between the second point and the third point on the first circle; the outer point of the end of the first segment is the intersection of the end of the first segment and the outer contour line of the first segment.

[0020] In a feasible embodiment, the scraper arm also includes a second section, the second section includes 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; the outer contour line of the second section is arc-shaped, and the extension direction of the root of the second section along the outer contour line of the second section to the end of the second section is the same as the first direction; the connection point of the outer contour line of the second section and the outer contour line of the first section is located on the second axis.

[0021] In a feasible embodiment, the scraper arm also includes a second section, the second section includes 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; the outer contour line of the second section is arc-shaped, and the extension direction of the root of the second section along the outer contour line of the second section to the end of the second section is the same as the first direction; the circle with the first point as the center and the distance from the outer point of the end of the second section to the first point as the radius is the second circle; the circle circumscribed to the first circle through the third point is the third circle, and an intersection point of the third circle and the second circle is the fourth point; the outer point of the end of the second section is the intersection point of the end of the second section and the outer contour line of the second section; the outer contour line of the second section is the arc between the third point and the fourth point on the third circle.

[0022] In a feasible embodiment, the ratio of the projected length of the outer contour line of the second section to the outer contour line of the wiper arm on the second axis is 1:4 to 1:6.

[0023] In a feasible embodiment, the inner contour line of the scraper arm is a straight line.

[0024] Alternatively, the inner contour line of the scraper arm is arc-shaped, and the curvature of the inner contour line of the scraper arm is not greater than the curvature of the outer contour line of the scraper arm;

[0025] Alternatively, the inner contour line of the scraper arm is arc-shaped, and the scraper arm is an axisymmetric figure, and the inner contour line of the scraper arm and the outer and inner contour lines of the scraper arm are symmetrical with respect to the symmetry axis of the scraper arm;

[0026] The inner side of the scraper arm is the side of the scraper arm that contacts the material to be cleaned in the cleaning disc when the scraper arm rotates in the first direction.

[0027] In a feasible embodiment, the scraper strip further comprises:

[0028] an elastic portion, the elastic portion wrapping an outer contour line of the scraper arm and an inner contour line of the scraper arm;

[0029] The lower edge of the elastic portion is lower than the lower edge of the scraper arm, so that when the scraper arm rotates in the first direction, the lower edge of the elastic portion contacts the bottom of the cleaning disk; and / or the elastic portion protrudes from the end of the scraper arm along the outer contour line of the scraper arm and the inner contour line of the scraper arm, so that the elastic portion and the side of the cleaning disk have an interference fit;

[0030] The inner side of the scraper arm is the side that contacts the material to be cleaned in the cleaning disc when the scraper arm rotates.

[0031] In a feasible embodiment, a protrusion is provided at the lower edge of the elastic portion, and the protrusion contacts the bottom of the cleaning tray.

[0032] In a feasible embodiment, a bayonet is provided on the scraper arm, and a protrusion is provided on the elastic part. The protrusion is inserted into the bayonet to fix the elastic part to the scraper arm.

[0033] According to the second aspect of the embodiment of the present application, a cleaning base station is proposed, including: a shell; a scraper bar as in the first aspect of the embodiment of the present application; a cleaning disc and a sewage trough are arranged on the shell; a mounting portion is rotatably arranged in the cleaning disc, and the mounting portion is used to drive the scraper bar arm to rotate around the center point of the mounting portion, and is used to push the material to be cleaned in the cleaning disc to the sewage trough; the sewage trough is located on the rotation path of the scraper bar arm.

[0034] Compared with the prior art, the scraping strip and cleaning base station of the present application have the following beneficial effects:

[0035] Taking sewage as an example of the material to be cleaned, the embodiment of the present application uses a scraper arm with a special shape, including a first section of an arc-shaped outer contour line, and rotates the scraper arm in a direction matching the arc shape, so that when the scraper arm rotates, the sewage can be pushed away from the center point of the mounting part, preventing the sewage from gathering at the location of the mounting part, effectively improving the water-pushing efficiency of the scraper, and thus improving the self-cleaning efficiency of the cleaning base station. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present application. The same reference symbols are used throughout the drawings to represent the same components. In the drawings:

[0037] Figure 1 A schematic structural diagram of a scraper strip according to an embodiment of the present application at a first angle;

[0038] Figure 2 A schematic structural diagram of a scraper strip at a first angle according to another embodiment of the present application;

[0039] Figure 3A A schematic structural diagram of the trajectory of the outer contour line of a scraper arm of a scraper provided in an embodiment of the present application;

[0040] Figure 3B A schematic structural diagram showing the extension direction of the first side and the extension direction of the second side of a scraper arm of a scraper provided in an embodiment of the present application;

[0041] Figure 3C Schematic structural diagrams of several scraper strips;

[0042] Figure 4 A schematic structural diagram of a scraper strip according to an embodiment of the present application from a second angle;

[0043] Figure 5 A schematic structural diagram of a scraper strip according to another embodiment of the present application at a second angle;

[0044] Figure 6 A schematic structural diagram of a scraper strip according to another embodiment of the present application;

[0045] Figure 7 A schematic structural diagram of a scraper strip according to another embodiment of the present application;

[0046] Figure 8 A schematic structural diagram of a scraper strip according to another embodiment of the present application;

[0047] Figure 9 This is a schematic structural diagram of the first angle of a scraper strip after the elastic portion is installed in an embodiment provided by the present application;

[0048] Figure 10 This is a schematic structural diagram of a scraper strip according to an embodiment of the present application after the elastic portion is installed, viewed from a second angle;

[0049] Figure 11 This is a schematic structural diagram of a scraper strip provided in an embodiment of the present application after the elastic portion is installed at a third angle;

[0050] in, Figures 1 to 11 The corresponding relationship between the reference numerals and component names is as follows:

[0051] 10. Mounting portion; 11. Squeegee arm; 12. First clamping member; 13. Outer contour of the scraper arm; 14. Inner contour of the scraper arm; 15. Elastic portion; 16. Protrusion on the elastic portion;

[0052] X, first axis; Y, second axis; Z, first direction;

[0053] 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;

[0054] 11a, root of the scraper arm; 11b, end of the scraper arm; 111, first section; 112, second section. DETAILED DESCRIPTION

[0055] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on this application.

[0056] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0057] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0058] The preferred embodiments of the present application are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present application and are not used to limit the present application.

[0059] In the first aspect of the embodiments of the present application, a scraper bar is proposed, which is arranged on a base station where a cleaning base station is docked. The cleaning base station can be a self-moving cleaning base station or other types of cleaning base stations that meet the requirements. Specifically, the cleaning base station is a sweeping robot, which is provided with a wet cleaning part. The base station corresponding to the sweeping robot is provided with a self-cleaning module, which includes cleaning ribs, a scraper bar, a cleaning disc and a sewage tank. After the sweeping robot docks at the base station, the wet cleaning part rotates and generates friction with the cleaning ribs, causing the sewage and dirt on the wet cleaning part to fall into the cleaning disc below the cleaning ribs. The cleaning disc is connected to the sewage tank, and the scraper bar in the cleaning disc rotates relative to the cleaning disc to recycle the sewage and dirt on the cleaning disc into the sewage tank.

[0060] like Figure 1 As shown, the scraper proposed according to the first aspect of the embodiment of the present application includes: a mounting portion 10 and a scraper 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 scraper arm 11 includes a root and an end portion, and the root portion of the scraper arm 11 is connected to the mounting portion 10, so that the scraper arm 11 can rotate in the first direction under the drive of the mounting portion 10; the scraper arm 11 includes a first section 111, the outer contour line of the first section 111 is arc-shaped, the first section 111 includes a root and an end portion, and the root portion of the first section 111 is the root portion of the scraper arm 11; wherein, the extension direction of the root portion of the first section 111 along the outer contour line of the first section 111 to the end portion of the first section 111 is opposite to the first direction; the first direction is clockwise or counterclockwise; the outer side of the scraper arm 11 is the side that the scraper arm 11 first contacts the material to be cleaned in the cleaning disc when the scraper arm 11 rotates in the first direction.

[0061] It is understood that the scraper arm 11 includes a root and an end portion. The root portion of the scraper arm 11 is connected to the mounting portion 10, and the end portion of the scraper arm 11 extends away from the mounting portion 10, such as Figure 1 In the figure, 11a is the root of the scraper arm 11, and 11b is the end of the scraper arm 11.

[0062] The curvature of the outer contour of the entire scraper arm 11 can remain consistent. In this case, the scraper arm 11 only includes the first section 111, that is, the entire scraper arm 11 is the first section 111. If the outer contour of the scraper arm 11 is composed of segments with different curvatures, the scraper arm 11 includes multiple segments, of which the first section 111 is the segment connected to the mounting portion 10. It is understood that different curvatures can be different signs of the curvatures, such as the first section 111 having a positive curvature and the second section 112 having a negative curvature; or the first section 111 having a negative curvature and the second section 112 having a positive curvature; or, for example, the curvatures of the three sections are positive-negative-positive or negative-positive-negative. Different curvatures can also be the same sign of the curvature but different magnitudes of the curvature.

[0063] The outer side is the side that first contacts the water when the scraper arm 11 rotates. Determining the outer side of the scraper arm also determines the direction of rotation of the scraper arm. Figure 1 In the figure, 13 is the outer side of the scraper arm 11, and 14 is the inner side of the scraper arm 11.

[0064] The scraper arm includes a first side and a second side. The following example illustrates how to determine which of the first and second sides of the scraper arm is the outer side and which is the inner side. The outer side and the inner side of the first and second sides of the scraper arm can be determined based on the shape of the first section of the scraper arm. It is understandable that once the first side of the scraper arm is specified, the first and second sides of each section it includes are also determined. Figure 3A As shown, if ac is designated as the first side of the scraper arm, then ab is the first side of the first segment and bc is the first side of the second segment. Further, if ac is determined to be the outer side of the scraper arm, then ab is the outer side of the first segment and bc is the outer side of the second segment.

[0065] If the scraper arm is a symmetrical shape, such as Figure 8 As shown, either the first side or the second side can be used as the outer side.

[0066] If the scraper arm is an asymmetrical shape, and the extension track of the contour line of the first side of the first section intersects the outer edge of the mounting portion at one point (that is, the extension track of the contour line of the first side is tangent to the outer edge of the mounting portion), and the extension track of the contour line of the second side of the first section intersects the outer edge of the mounting portion at two points (that is, the extension track of the contour line of the second side intersects the outer edge of the mounting portion), then the first side is the outer side. Figure 3A As shown, the extension trajectory of the contour line of the first side of the first section and the extension trajectory of the contour 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 portion, and the fourth circle D intersects with the outer edge of the mounting portion. The first side corresponding to the first circle is taken as the outer side.

[0067] If the scraper arm is an asymmetrical figure, and the extension track of the contour line of the first side of the first section has two intersections with the outer edge of the mounting portion (that is, the extension track of the contour line of the first side intersects with the outer edge of the mounting portion) and the extension track of the contour line of the second side of the first section has two intersections with the outer edge of the mounting portion (that is, the extension track of the contour line of the second side intersects with the outer edge of the mounting portion), then the one with the larger split ratio is taken as the outer side. The split ratio means that when the extension track of the contour line has two intersections with the outer edge of the mounting portion, the extension track of the contour line will cut the mounting portion into two parts, and the ratio of the area of ​​the larger part to the smaller part of the two parts is the split ratio. Figure 3BAs shown, the extension trajectory of the contour line of the first side of the first segment and the extension trajectory of the contour line of the second side of the first segment are the fifth circle E and the sixth circle F, respectively. The fifth circle E intersects with the outer edge of the mounting portion, dividing the mounting portion into two parts, E1 and E2, where E1 is the smaller part and E2 is the larger part. The sixth circle F intersects with the outer edge of the mounting portion, dividing the mounting portion into two parts, F1 and F2, where F1 is the smaller part and F2 is the larger part. E2 / E1 is greater than F2 / F1, that is, the division ratio corresponding to the first side is greater than the division ratio corresponding to the second side, and the first side is considered the outer side.

[0068] The outer side is the side that first contacts the water when the scraper arm 11 rotates. Determining the outer side of the scraper arm also determines the direction of rotation of the scraper arm. Figure 3A In the experiment, it is determined that the ac side is the outer side. If the scraper rotates counterclockwise, the ac side contacts the water first; if the scraper rotates clockwise, the ac side contacts the water later, which is contrary to the determined ac side is the outer side. Therefore, in the experiment, the ac side contacts the water later. Figure 3A The scraper bar rotates counterclockwise instead of clockwise.

[0069] In an embodiment of the present application, a special scraper arm shape is used to improve the water-pushing efficiency of the scraper. The scraper arm shape needs to meet the following conditions: if the rotation direction is the first direction, then the extension direction of the root of the first section 111 along the outer contour line of the first section 111 to the end of the first section 111 is the opposite direction of the first direction.

[0070] The rotation direction of the scraper arm is clockwise or counterclockwise, so the extension direction of the root of the first section 111 along the outer contour line of the first section 111 to the end of the first section 111 needs to be counterclockwise or clockwise, that is, the outer contour line of the scraper arm needs to be at least arc-shaped rather than straight.

[0071] for Figure 3C The three shapes of scraper arms shown are as follows: the arrow indicates the outer side of the scraper arm, the rotation direction of the scraper arm is counterclockwise, and the opposite direction of rotation is clockwise. The shape of the scraper arm that can improve the water pushing efficiency of the scraper should satisfy the following requirements: the direction of extension of the root of the first section 111 along the outer contour line of the first section 111 to the end of the first section 111 is clockwise. For the scraper arm on the left, the direction of extension of the root of the first section 111 along the outer contour line of the first section 111 to the end of the first section 111 is a straight line, not clockwise. For the scraper arm in the middle, the direction of extension of the root of the first section 111 along the outer contour line of the first section 111 to the end of the first section 111 is clockwise. For the scraper arm on the right, the direction of extension of the root of the first section 111 along the outer contour line of the first section 111 to the end of the first section 111 is counterclockwise, not clockwise. Therefore, in Figure 3C Among the three types of scraper arms shown, only the shape of the middle scraper arm meets the requirements of the embodiment of the present application.

[0072] It is understandable that in Figure 1 In the figure, the scraper is roughly in the shape of a "6". The direction marked by the arrow on the outer contour line of the first section 111 is the extension direction of the root of the first section 111 along the outer contour line of the first section 111 to the end of the first section 111. When the scraper rotates in the cleaning disc, the protruding part of the arc-shaped contour line of the first section 111 first contacts the material to be cleaned.

[0073] It can be understood that the outer contour line of the first section 111 is arc-shaped. Theoretically, the outer side of the first section 111 is a surface, that is, the outer side surface of the first section 111, but the scraper arm 11 is thin and has a small thickness, so the description here ignores the thickness of the scraper arm 11.

[0074] In some examples, the scraper arm 11 and the mounting portion 10 may be integrally formed, or may be formed separately and then assembled together by connection, gluing, or the like.

[0075] The scraper provided in the embodiment of the present application includes a mounting portion 10 and a scraper arm 11. The mounting portion 10 can rotate in a first direction relative to the cleaning disc, thereby driving the scraper arm 11 connected to the mounting portion 10 to rotate synchronously in the first direction. The rotation of the scraper arm 11 pushes the sewage on the cleaning disc to scrape and clean the cleaning disc; by making the outer contour line of the arc-shaped first section 111 bulge in the first direction, so that the first section 111 pushes the sewage away from the center of the mounting portion 10 when the scraper arm 11 pushes the sewage, the scraper can prevent the sewage from gathering at the position where the mounting portion 10 is located during the cleaning process. The arc-shaped first section 111 continuously pushes water outward, thereby improving the water pushing efficiency and effect of the scraper, so that 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 water stains on the cleaning disc, and improve the cleanliness of the cleaning disc.

[0076] like Figure 1 As shown, in a feasible embodiment, the angle between the positive normal vector of the arc passing through the midpoint of the arc and the first ray is an obtuse angle; the first ray is a ray pointing from the center point of the mounting portion 10 to the outer point of the end of the first section 111.

[0077] The positive normal vector is the normal vector pointing to the center of the circle in which the arc is located. In this technical solution, the angle between the positive normal vector and the first ray is an obtuse angle; the first ray is the ray pointing from the center point of the mounting portion 10 to the outer point of the end of the first section 111, that is, the outer contour line of the first section 111 is an arc convex in the direction away from the mounting portion 10. The arc-shaped first section 111 can guide the water droplets remaining on the scraper arm 11, accelerate the removal of the water droplets on the scraper arm 11, and remove the water droplets remaining on the scraper arm 11, thereby improving the cleanliness of the scraper arm 11 itself, and thereby improving the cleanliness of the scraper as a whole.

[0078] It can be understood that the outer point of the end of the first segment 111 is the intersection of the end of the first segment 111 and the outer contour line of the first segment 111. The arc is the outer side of the first segment 111, and the positive normal vector of the midpoint of the arc is the positive normal vector drawn from the geometric center of the outer side of the first segment 111, forming a first ray as shown in FIG. Figure 1 For simplicity, the end of the first segment 111 is simplified to a surface. If further simplification is performed on this basis, without considering the thickness of the scraper strip, the end of the first segment 111 can be simplified to a line segment with two endpoints, one of which intersects with the outer contour line of the first segment 111. The intersection point is the outer point of the end of the first segment 111.

[0079] like Figure 2 As shown, in a feasible embodiment, the scraper arm 11 also includes a second section 112, the second section 112 includes a root and an end, the root of the second section 112 smoothly transitions to the end of the first section 111, and the root of the second section 112 is connected to the end of the first section 111; the outer contour line of the second section 112 is arc-shaped, and the extension direction of the root of the second section 112 along the outer contour line of the second section 112 to the end of the second section 112 is the same as the first direction.

[0080] In this technical solution, the root of the second section 112 is connected to the end of the first section 111, and the arc-shaped second section 112 protrudes away from the first direction. When the scraper arm 11 scrapes the cleaning disc, the first section 111 first pushes the sewage on the cleaning disc to the outside of the cleaning disc. When the sewage reaches the second section 112, the rotation of the second section 112 will provide an outward throwing force to the sewage passing through the second section 112, and the sewage will be thrown out quickly. By accelerating the sewage to be thrown out, the cooperation of the first section 111 with a water pushing effect and the second section 112 with a water throwing effect further reduces the possibility of sewage backflowing to the location of the mounting part 10, thereby further improving the cleaning efficiency and cleaning effect of the scraper.

[0081] In this technical solution, the wiper arm 11 is composed entirely of a first section 111 and a second section 112, with a smooth transition between the first and second sections 111, 112. For example, the outer contours of the first and second sections 111, 112 intersect at point W. The derivative of the outer contours of the first and second sections 112 at point W is equal in magnitude, indicating first-order continuity between the outer contours of the first and second sections 111, 112. Furthermore, the second-order derivatives of the outer contours of the first and second sections 112 at point W can be made equal in magnitude, resulting in second-order continuity between the outer contours of the first and second sections 111, 112. The end of the first and second sections 111, 112, connect at point W.

[0082] Exemplarily, the curvature of the second segment 112 has an opposite sign to that of the first segment 111, for example, the curvature of the first segment 111 is positive and the curvature of the second segment 112 is negative, or the curvature of the first segment 111 is negative and the curvature of the second segment 112 is positive, so that the outer arc contour line of the second segment 112 and the convex direction of the outer arc contour line of the first segment 111 are opposite.

[0083] Furthermore, the outer contour line of the second segment 112 is arc-shaped, and the arc can be a circular arc, an elliptical arc, or a parabolic arc.

[0084] It is understood that the outer contour of the second segment 112 is arc-shaped. Theoretically, the outer side of the second segment 112 is a surface, namely, the outer side surface of the second segment 112. However, the scraper arm 11 is relatively thin and has a small thickness, so the thickness of the scraper arm 11 is ignored in this description. For simplicity, the end of the second segment 112 is simplified to a surface. If further simplification is performed on this basis and the scraper thickness is ignored, the end of the second segment 112 can be simplified to a line segment with two endpoints, one of which intersects with the outer contour of the second segment 112, and the other intersects with the inner contour of the second segment 112.

[0085] It is understandable that if Figure 2 The direction marked by the arrow on the outer contour line of the second section 112 is the extension direction of the root of the second section 112 along the outer contour line of the second section 112 to the end of the second section 112. The part where the arc-shaped outer contour line of the second section 112 is connected with the arc-shaped outer contour line of the first section 111 first contacts the material to be cleaned.

[0086] like Figure 1 and Figure 2 As shown, in a feasible embodiment, the outer contour line of the root area of ​​the scraper arm 11 transitions smoothly with the outer edge of the mounting portion 10 .

[0087] In this technical solution, the outer contour line of the area where the root of the scraper arm 11 is located transitions smoothly with the outer edge of the mounting portion 10, reducing the dead angle at the junction of the scraper arm 11 and the mounting portion 10, making the lines at the junction of the scraper arm 11 and the mounting portion 10 smooth, thereby reducing the possibility of water accumulation at the mounting portion 10 on the cleaning disc.

[0088] In some examples, when the mounting portion 10 is a polygonal structure, the outer contour line of the root of the scraper arm 11 extends along one side of the mounting portion 10 to ensure that there is no dead corner of water accumulation between the mounting portion 10 and the outer contour line of the root of the scraper arm 11.

[0089] like Figure 1 and Figure 2 As shown, in a feasible embodiment, the outer contour line of the first section 111 is arc-shaped, the mounting portion 10 is disc-shaped, and the outer contour line of the root area of ​​the scraper arm 11 is inscribed in the outer edge of the mounting portion 10.

[0090] In this technical solution, the outer contour line of the root of the scraper arm 11 and the outer edge of the mounting portion 10 are inscribed inwardly to ensure that the outer contour line of the entire scraper is smooth, thereby reducing the residual water stains on the scraper itself and improving the overall self-cleaning ability and self-cleaning effect of the scraper.

[0091] In this technical solution, the mounting portion 10 is disc-shaped. On the one hand, it can evenly disperse the forces acting on the mounting portion 10 in all directions when it rotates, so that the mounting portion 10 itself rotates more smoothly, which is beneficial to improving the stability of the overall rotation of the scraper strip, and improving the durability and service life of the scraper strip; on the other hand, the outer edges of the outer contour lines of the disc-shaped mounting portion 10 and the first section 111 are smooth, with few dead corners, which helps to maintain the cleanliness of the scraper strip itself.

[0092] Furthermore, the outer contour line of the root of the scraper arm 11 is an arc, and the mounting portion 10 is a disc. The circumference of the arc is inscribed in the circumference of the disc. Figure 3A In the figure, the circumference of the arc is inscribed in the circumference of the outer edge of the mounting portion 10 , forming a tangent point a on the outer edge of the mounting portion 10 .

[0093] The following is an example of how to determine the outer contour line of the first segment. Figure 3AAs shown, in a feasible embodiment, two straight lines passing through the center point of the mounting portion and perpendicular to each other are used as the first axis and the second axis, the center point of the mounting portion is used as the first point, the intersection of the outer edge of the mounting portion and the first axis is used as the second point, the first circle is determined with a target point on the first axis that is on the opposite side of the second axis as the center of the circle and a distance from the target point to the second point as the radius; the intersection of the first circle and the second axis is used as the third point; the outer contour line of the first segment is the arc between the second point and the third point on the first circle; the outer point of the end of the first segment is the intersection of the end of the first segment and the outer contour line of the first segment.

[0094] This example illustrates how to determine the outer contour of the first segment 111. The mounting portion 10 is disc-shaped. First, define a first axis and a second axis that pass through the center of the mounting portion 10 and are perpendicular to each other. The first axis is in the X-axis, and the second axis is in the Y-axis. A first circle A is defined, with the center of the mounting portion as the first point, the intersection of the outer edge of the mounting portion and the first axis as the second point, a first target point on the first axis that is on the opposite side of the second axis from the second point as the center, and the distance from the first target point to the second point as the radius. The first circle A and the outer edge of the mounting portion are inscribed in the second point. The first circle is the larger of the two inscribed circles, and the outer edge of the mounting portion is the smaller of the two inscribed circles. The distance between the first target point and the center of the mounting portion 10 influences the arc of the outer contour of the first segment. In other words, the first target point is determined based on the desired arc of the outer contour of the first segment. It should be understood that the first target point needs to be on the opposite side of the second axis from the second point. If they are on the same side, the first circle is the smaller of the two inscribed circles. Once the first circle is determined, the intersection of the first circle and the second axis can be used as the third point (for example, the intersection of the first circle and the positive half axis of the second axis can be used as the third point), and the arc between the second point and the third point on the first circle can be used as the outer contour line of the first segment 111.

[0095] like Figure 3A As shown, in a feasible embodiment, the scraper arm 11 also includes a second section 112, and the second section 112 includes a root and an end. The root of the second section 112 smoothly transitions with the end of the first section 111, and the root of the second section 112 is connected to the end of the first section 111; the outer contour line of the second section 112 is arc-shaped, and the extension direction of the root of the second section 112 along the outer contour line of the second section 112 to the end of the second section 112 is the same as the first direction; the circle with the first point as the center and the distance from the outer point of the end of the second section 112 to the first point as the radius is the second circle; the circle circumscribed to the first circle through the third point is the third circle, and an intersection point of the third circle and the second circle is the fourth point; the outer point of the end of the second section 112 is the intersection point of the end of the second section 112 and the outer contour line of the second section 112; the outer contour line of the second section 112 is the arc between the third point and the fourth point on the third circle.

[0096] This embodiment illustrates how to determine the outer contour of the second segment 112. The radius of the second circle B can be determined based on the desired distance from the end of the second segment 112 (the end is actually a surface; if the blade thickness is disregarded, the end is a line, which is simplified here as a point) to the center of the mounting portion 10. It should be understood that the blade rotates within the cleaning disk with the center of the mounting portion 10 as its rotational center. The radius of the second circle should match the size of the cleaning disk. If the radius of the second circle B is too large or the blade is too long, the blade arm 11 may strike the sidewalls of the cleaning disk during rotation. If the radius of the second circle B is too small or the blade is too short, the portion of the cleaning disk whose distance from the center of the mounting portion 10 is greater than the radius of the second circle will not be cleaned by the blade during rotation. Therefore, the distance from the end of the second segment 112 to the center of the mounting portion 10, and therefore the radius of the second circle, can be determined based on the size of the cleaning disk.

[0097] The circle circumscribing the first circle A through the third point b is the third circle C. Specifically, the method for determining this is to determine a second target point as the center on the extension of the line connecting the center of the first circle and the third point b. A circle is then drawn with the distance between the second target point and the third point as the radius. This results in the third circle C circumscribing the first circle A. It is understood that the second target point can be determined based on the desired curvature of the outer contour of the second segment. The third circle C and the second circle B have two intersection points: intersection point c, which extends along the end of the first segment 111, and intersection point d, which extends away from the end of the first segment 111. The outer contour of the second segment 112 is the arc between the third point b and the fourth point on the third circle. Using d as the fourth point is clearly inappropriate because the inferior arc bd and the superior arc bd either fail to smoothly connect with the arc ab or have excessive bends that easily accumulate water. Therefore, intersection point c is used as the fourth point.

[0098] like Figure 2 and Figure 3A As shown, in a feasible embodiment, the connection point of the outer contour line of the second section 112 and the outer contour line of the first section 111 is the 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 here.

[0099] In this technical solution, the junction of the outer contour line of the second section 112 and the outer contour line of the first section 111 is located on the second axis to ensure the water pushing effect of the first section 111, and to ensure that the sewage on the scraper bar can be smoothly pushed outward to the second section 112 through 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 smoothly connected, which helps to improve the overall cleaning effect of the scraper bar and improve the overall cleanliness of the scraper bar.

[0100] like Figure 2As shown, in a feasible embodiment, the projection length ratio of the outer contour line of the second section 112 to the outer contour line of the wiper arm 11 on the second axis is 1:4 to 1:6, preferably 1:5.

[0101] The inventors of this application have proved through a large number of experiments that when the length ratio of the first section 111 with water pushing effect and the second section 112 with water throwing effect is correct, the coordinated effect of pushing and throwing water is optimal, the cleaning efficiency of the scraper is optimal, and both structural stability and rotation smoothness are achieved.

[0102] like Figures 1 to 8 As shown, in a feasible embodiment, the contour line of the inner side of the scraper arm 11 is a straight line, or the contour line of the inner side of the scraper arm 11 is arc-shaped, and the curvature of the contour line of the inner side of the scraper arm 11 is not greater than the curvature of the contour line of the outer side of the scraper arm 11; or the contour line of the inner side of the scraper arm 11 is arc-shaped, and the scraper arm 11 is an axially symmetrical figure, and the contour line of the inner side of the scraper arm 11 and the contour lines of the inner and outer sides of the scraper arm 11 are symmetrical relative to the symmetry axis of the scraper arm 11; wherein, the inner side of the scraper arm 11 is the side of the scraper arm 11 that contacts the material to be cleaned in the cleaning disc when the scraper arm 11 rotates in the first direction.

[0103] In this technical solution, the inner contour of the scraper arm 11 can be designed in a variety of ways. The inner side of the scraper arm 11 is the side that contacts the material to be cleaned in the wash pan during rotation. The outer side of the scraper arm 11 is primarily used for pushing and discarding water, and its outer contour significantly impacts cleaning efficiency, leaving more room for design on the inner contour. Therefore, once the outer contour is determined, the inner contour can be designed in a variety of ways.

[0104] In this technical solution, if Figure 6 and Figure 7 In either case, the inner contour of the scraper arm 11 is a straight line, or the inner contour of the scraper arm 11 is curved and the curvature of the inner contour of the scraper arm 11 is no greater than the curvature of the outer contour of the scraper arm 11. By adjusting the inner contour of the scraper arm 11 while keeping the outer contour unchanged, scrapers of varying widths and shapes can be formed. The appropriate size and shape of the inner contour can be selected based on a comprehensive consideration of factors such as the difficulty of manufacturing and processing, the contact area with the cleaning disk, whether the scraper structure is susceptible to water accumulation, and whether it has sufficient strength and rotational stability.

[0105] In this technical solution, if Figure 8The scraper arm 11 is an axially symmetrical figure, and the inner contour line of the scraper arm 11 and the outer contour line of the scraper arm 11 are symmetrical relative to the symmetry axis of the scraper arm 11. When two scrapers are respectively installed in two cleaning trays and the two cleaning trays share a sewage tank, since the scraper arm 11 is a symmetrical structure, the scrapers of the left and right cleaning trays can be mixed, so when assembling the scrapers, there is no need to care about the correspondence between the scrapers and the left and right cleaning trays, which is conducive to improving assembly efficiency.

[0106] like Figure 9 and Figure 10 As shown, in a feasible embodiment, the scraper further includes: an elastic portion 15, the elastic portion wraps the outer contour line of the scraper arm 11 and the inner contour line of the scraper arm 11, and the lower edge of the elastic portion 15 is lower than the lower edge of the scraper arm 11; so that when the scraper arm 11 rotates in the first direction, the lower edge of the elastic portion 15 contacts the bottom of the cleaning disk; and / or, the elastic portion 15 protrudes from the end of the scraper arm 11 along the outer contour line of the scraper arm 11 and the inner contour line of the scraper arm 11, so that the elastic portion and the side of the cleaning disk are interference fit; wherein, the inner side of the scraper arm 11 is the side of the scraper arm 11 that contacts the material to be cleaned in the cleaning disk when the scraper arm 11 rotates.

[0107] It is understandable that the scraper arm has a certain thickness, but the part in contact with the cleaning disk is the lower edge. The elastic part 15 can cover the entire outer side and the entire inner side of the scraper arm 11, or only cover the outer lower edge and the inner lower edge.

[0108] In this technical solution, the elastic portion 15 is wrapped around the outer contour line of the scraper arm 11 and the outer side of the inner contour line of the scraper arm 11. The lower edge of the elastic portion 15 is lower than the lower edge of the scraper arm 11. When the scraper arm 11 rotates in the first direction, it contacts the bottom of the cleaning disk, so that the scraper and the bottom of the cleaning disk have an interference fit. The elastic portion protrudes from the end of the scraper arm 11 along the outer contour line of the scraper arm 11 and protrudes from the end of the scraper arm 11 along the inner contour line of the scraper arm 11, so that the elastic portion has an interference fit with the side of the cleaning disk. As a result, the elastic portion 15 generates elastic deformation when contacting the bottom and side of the cleaning disk, ensuring that the scraper and the cleaning disk are in full contact, which not only ensures the wiping effect of the scraper arm 11, but also avoids damage to the structural components, thereby extending the service life of the self-cleaning module. In addition, when the two scraper arms 11 located in the two cleaning disks interfere and collide, the elastic member 15 can prevent the scraper arms 11 from being damaged.

[0109] Furthermore, the elastic portion includes two Figure 9 In the embodiment, one of the elastic portions wraps around the left side of the scraper arm 11 and extends out of the end of the scraper arm 11 along the length direction of the scraper arm 11, and the other elastic portion wraps around the right side of the scraper arm 11 and extends out of the end of the scraper arm 11 along the length direction of the scraper arm 11.

[0110] It is understandable that the lower edge of the scraper arm 11 is not higher than the lower edge of the mounting portion 10. Figure 11 In the embodiment, the lower edge of the elastic portion 15 is lower than the lower edge of the scraper arm 11 and the lower edge of the mounting portion 10 to ensure that the elastic portion 15 is in flexible contact with the bottom of the cleaning disc, thereby reducing the gap between the scraper arm 11 and the cleaning disc and improving the wiping effect of the scraper arm 11.

[0111] like Figure 10 As shown, in a feasible embodiment, a protrusion 16 is provided at the lower edge of the elastic portion 15 , and the protrusion contacts the bottom of the cleaning tray.

[0112] In this technical solution, a protrusion 16 is provided at the lower edge of the elastic part 15, and the protrusion 16 contacts the bottom of the cleaning plate, so that the protrusion and the elastic part form a diversion cavity, so that the sewage can flow out of the scraper smoothly under the guidance of the diversion cavity, preventing the sewage from gathering between the two elastic parts 15 of the scraper arm 11, and preventing water accumulation inside the scraper.

[0113] Furthermore, the protrusion 16 is provided on the lower edge of the side of the elastic part, and the lowest point of the lower edge of the protrusion is not lower than the lower edge of the elastic part to ensure that the elastic part is in full contact with the bottom of the cleaning plate to scrape the sewage.

[0114] In a feasible embodiment, a bayonet is provided on the scraper arm 11 , and a protrusion is provided on the elastic portion 15 . The protrusion is inserted into the bayonet, so that the elastic portion 15 is fixed to the scraper arm 11 .

[0115] In this technical solution, a bayonet is provided on the scraper arm 11, and a protrusion is provided on the elastic part 15. The protrusion is inserted into the bayonet so that the elastic part 15 is plug-connected with the scraper arm 11. When the elastic part 15 needs to be cleaned or is severely deformed, the elastic part and the scraper arm 11 can be quickly disassembled and assembled, and the elastic part can be replaced, and the operation is simple and quick.

[0116] like Figure 4 and Figure 5 As shown, in a feasible embodiment, a boss is provided on the cleaning disc, and a through hole is provided on the boss, and a rotating member for driving the mounting portion 10 to rotate extends into the through hole, and the bottle cap-shaped mounting portion 10 is snapped onto the boss; a first clamping member 12 is provided on the surface of the top wall of the mounting portion 10 facing the boss, and the first clamping member 12 is clamped with the second clamping member on the rotating member, so that the mounting portion 10 can be driven to rotate when the rotating member rotates; at the same time, the mounting portion 10 is clamped and connected to the rotating member, which facilitates the disassembly and replacement of the mounting portion 10, so as to regularly maintain the cleaning disc and the scraper to prevent dirt from accumulating on the cleaning disc and the scraper and generating bacteria, so as to ensure the cleanliness of the cleaning disc and the scraper.

[0117] In this technical solution, after the rotating member that drives the mounting portion 10 to rotate is connected to the driving device, it extends from the through hole of the boss, and the mounting portion 10 is snapped onto the boss to position the mounting portion 10 through the boss, and is fixed by the first clamping member 12 and the second clamping member on the rotating member (not shown in the figure), so that the mounting portion 10 is stably connected to the rotating member, so that under the drive of the rotating member, the mounting portion 10 can rotate in the first direction relative to the cleaning disk to scrape the sewage on the cleaning disk.

[0118] In a feasible embodiment, the cleaning disc is connected to a sewage trough, and the rotation path of the scraper arm 11 in the cleaning disc covers at least a portion of the sewage trough; when the scraper arm 11 rotates in the first direction, the scraper arm 11 pushes the material to be cleaned in the cleaning disc to the sewage trough.

[0119] In this technical solution, a sewage trough is also provided on the cleaning disc, and the rotation path of the scraper arm 11 covers at least part of the sewage trough. By rotating the scraper arm 11 in the first direction, the sewage in the cleaning disc is pushed to the sewage trough and then discharged centrally, so as to realize centralized treatment of the sewage after scraping, thereby realizing self-cleaning of the cleaning base station.

[0120] According to the second aspect of the present application, a cleaning base station is proposed, comprising: a shell; a scraper; a cleaning disc and a sewage trough are arranged on the shell; a mounting portion is rotatably arranged in the cleaning disc, and the mounting portion is used to drive the scraper arm to rotate around the center point of the mounting portion, so as to push the material to be cleaned in the cleaning disc to the sewage trough; the sewage trough is located on the rotation path of the scraper arm.

[0121] Exemplarily, the scraping bar of the cleaning base station may include a first scraping bar and a second scraping bar, the second scraping bar is a symmetrical scraping bar of the first scraping bar; the first direction of the first scraping bar is opposite to the first direction of the second scraping bar, one of which is clockwise and the other is counterclockwise.

[0122] The cleaning base station provided in the embodiment of the present application includes a scraping bar as in any of the above technical solutions, so the cleaning base station has all the beneficial effects of the scraping bar in the above technical solutions, which will not be described in detail here.

[0123] It is easy for those skilled in the art to understand that, under the premise of no conflict, the above-mentioned advantageous methods can be freely combined and superimposed.

[0124] The above are merely preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application. The above are merely preferred embodiments of the present application. It should be noted that those skilled in the art may make various improvements and variations without departing from the technical principles of the present application, and such improvements and variations shall also be considered within the scope of protection of the present application.

Claims

1. A scraper strip, characterized in that: The scraper strip comprises: a mounting portion rotatably connected to the cleaning disc, and capable of rotating in a first direction; a scraper arm, the scraper arm comprising a root portion and an end portion, the root portion of the scraper arm being connected to the mounting portion so that the scraper arm can rotate in the first direction driven by the mounting portion; The scraper arm includes a first section, the outer contour line of the first section is arc-shaped, the first section includes a root and an end, and the root of the first section is the root of the scraper arm; Among them, the extension direction of the root of the first section along the contour line of the outer side of the first section toward the end of the first section is opposite to the first direction; the first direction is clockwise or counterclockwise; the outer side of the scraper arm is the side that first contacts the material to be cleaned in the cleaning disc when the scraper arm rotates toward the first direction.

2. A wiper strip according to claim 1, characterized in that: The scraper arm includes a first side and a second side, If the scraper arm is a symmetrical shape, the first side or the second side is the outer side of the scraper arm; If the scraper arm is an asymmetrical shape, an extension trajectory of the contour line of the first side of the first section intersects the outer edge of the mounting portion at one point, and an extension trajectory of the contour line of the second side of the first section intersects the outer edge of the mounting portion at two points, then the first side is the outer side of the scraper arm; If the scraper arm is an asymmetric shape, the extension trajectory of the contour line of the first side of the first section has two intersections with the outer edge of the mounting portion, and the extension trajectory of the contour line of the second side of the first section has two intersections with the outer edge of the mounting portion, then the side with a larger corresponding division ratio is the outer side of the scraper arm; wherein, the extension trajectory of the contour line on one side of the scraper arm cuts the mounting portion into two parts, and the ratio of the area of ​​the larger part to the smaller part of the two parts is the division ratio corresponding to that side.

3. A wiper strip according to claim 1, characterized in that: The angle between the normal vector of the arc passing through the midpoint of the arc and the first ray is an obtuse angle; the first ray is a ray pointing from the center point of the mounting portion to the outer point of the end of the first section.

4. A wiper strip according to any one of claims 1 to 3, characterized in that: The scraper arm further includes a second section, the second section including 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; The outer contour line of the second segment is arc-shaped, and the extension direction of the root of the second segment along the outer contour line of the second segment toward the end of the second segment is the same as the first direction.

5. A wiper strip according to claim 1, characterized in that: The outer contour line of the first section is in an arc shape, the mounting portion is in a disc shape, and the outer contour line of the first section is inscribed in the outer edge of the mounting portion.

6. A wiper strip according to claim 5, characterized in that: A first circle is determined by taking two straight lines passing through the center point of the mounting portion and being perpendicular to each other as the first axis and the second axis, the center point of the mounting portion as the first point, the intersection of the outer edge of the mounting portion and the first axis as the second point, a first target point on the first axis that is on the opposite side of the second axis from the second point as the center, and a distance from the first target point to the second point as the radius; the intersection of the first circle and the second axis is the third point; the outer contour line of the first segment is the arc between the second point and the third point on the first circle; the outer point of the end of the first segment is the intersection of the end of the first segment and the outer contour line of the first segment.

7. A wiper strip according to claim 6, characterized in that: The scraper arm further includes a second section, the second section including 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; The outer contour line of the second segment is arc-shaped, and the extension direction of the root of the second segment along the outer contour line of the second segment toward the end of the second segment is the same as the first direction; A point where the outer contour line of the second segment and the outer contour line of the first segment meet is located on the second axis.

8. A wiper strip according to claim 6, characterized in that: The scraper arm further includes a second section, the second section including 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; The outer contour line of the second segment is arc-shaped, and the extension direction of the root of the second segment along the outer contour line of the second segment toward the end of the second segment is the same as the first direction; A circle with the first point as its center and the distance from the outer point of the end of the second segment to the first point as its radius is a second circle; a circle circumscribing the first circle through the third point is a third circle, and an intersection point of the third circle and the second circle is a fourth point; the outer point of the end of the second segment is the intersection point of the end of the second segment and the outer contour line of the second segment; The outer contour line of the second segment is an arc between the third point and the fourth point on the third circle.

9. A wiper strip according to claim 7 or 8, characterized in that: The ratio of the projection length of the outer contour line of the second section to the outer contour line of the scraper arm on the second axis is 1:4 to 1:

6.

10. The wiper strip according to claim 1, characterized in that: The inner contour line of the scraper arm is a straight line. Alternatively, the inner contour line of the scraper arm is arc-shaped, and the curvature of the inner contour line of the scraper arm is not greater than the curvature of the outer contour line of the scraper arm; Alternatively, the inner contour line of the scraper arm is arc-shaped, and the scraper arm is an axisymmetric figure, and the inner contour line of the scraper arm and the outer and inner contour lines of the scraper arm are symmetrical relative to the symmetry axis of the scraper arm; The inner side of the scraper arm is the side of the scraper arm that contacts the material to be cleaned in the cleaning disc when the scraper arm rotates toward the first direction.

11. The wiper strip according to claim 1, characterized in that: The scraper strip further comprises: an elastic portion, wherein the elastic portion wraps around an outer contour line of the scraper arm and an inner contour line of the scraper arm; The lower edge of the elastic portion is lower than the lower edge of the scraper arm, so that when the scraper arm rotates in the first direction, the lower edge of the elastic portion contacts the bottom of the cleaning disk; and / or the elastic portion protrudes from the end of the scraper arm along the outer contour line of the scraper arm and the inner contour line of the scraper arm, so that the elastic portion and the side surface of the cleaning disk have an interference fit; The inner side of the scraper arm is the side that contacts the material to be cleaned in the cleaning disc when the scraper arm rotates.

12. A wiper strip according to claim 11, characterized in that: A protrusion is provided at the lower edge of the elastic portion, and the protrusion contacts the bottom of the cleaning tray.

13. The wiper strip according to claim 11, characterized in that: The scraper arm is provided with a bayonet, and the elastic part is provided with a protrusion. The protrusion is inserted into the bayonet, so that the elastic part is fixed to the scraper arm.

14. A cleaning base station, characterized in that: include: case; The scraper strip according to any one of claims 1 to 13; wherein the housing is provided with a cleaning tray and a sewage tank; The mounting portion is rotatably disposed in the cleaning tray, and is used to drive the scraper arm to rotate around the center point of the mounting portion to push the material to be cleaned in the cleaning tray to the sewage trough; the sewage trough is located on the rotation path of the scraper arm.

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