Patent Publication Number: US-2023133008-A1

Title: Maintenance Base Station

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     The present disclosure claims the priority to the Chinese patent application with the filing No. 2021112776386, filed on Oct. 29, 2021 with the Chinese Patent Office, and entitled “Maintenance Base Station”, the contents of which are incorporated herein by reference in entirety. 
     TECHNICAL FIELD 
     The present disclosure pertains to the technical field of refuse processing plant, and particularly relates to maintenance base station. 
     BACKGROUND ART 
     Maintenance base station is one of cleaning equipment commonly used in households, the main body thereof comprises a bin body having an opening and a barrel cover capable of blocking or revealing the opening, and the internal of the bin body can accommodate a bag body structure for containing waste. Generally, the barrel cover is pivotally connected to the bin body, and the barrel cover blocks or reveals the opening through the flip relative to the bin body. 
     In the prior art, the maintenance base station is provided with a pivoting portion and a locking portion that are oppositely arranged along the radial direction thereof, and a part of the pivoting portion is provided on a side margin of the barrel cover, while the other part of the pivoting portion is provided on a side margin of the bin body, and this part of the pivoting portion includes a pivot shaft, and the flip of the barrel cover relative to the bin body is realized by pivoting the barrel cover and the bin body through the pivoting portion. A part of the locking portion is provided on the side margin of the barrel cover, while the other part of the locking portion is provided on the side margin of the bin body; and the barrel cover and the bin body are locked with each other through the locking portion. 
     However, due to the complex structure of the design of the pivoting portion and the locking portion, corresponding accommodating space has to be designed in the bin body and in the barrel cover, so as to hide the corresponding complex structure in the bin wall of the maintenance base station, which inevitably causes thickening of the bin wall of the maintenance base station and results in excess overall design of the maintenance base station. For example, since the pivot shaft in the pivoting portion has a relatively great volume and the locking portion is supported by the bin wall and has to occupy necessary installation space; a double-layer design is adopted for the bin wall of the bin body of the maintenance base station; in order to accommodate corresponding pivot shaft and locking portion, wherein the space between the double-layer bin wall is used as accommodating space for achieving the purpose of accommodating structural components. 
     SUMMARY 
     An object of embodiments of the present disclosure is to provide a maintenance base station, so as to solve the technical problem existing in the prior art that maintenance base stations are complex in structure and have a thickened bin body. 
     In order to achieve the above object, following technical solution is adopted in the present disclosure: A maintenance base station is provided, comprising a bin body, a rotatable cover, and a revolving shaft, wherein the rotatable cover is in rotatable connection with the bin body via the revolving shaft, the bin body has a debris collection chamber and a opening in communication with the debris collection chamber, and the rotatable cover is configured for blocking or revealing the opening; 
     partial bin wall of the bin body adjacent to the opening is stretched towards the inner side or the outer side of the bin body, hereby forming an avoidance area, and the revolving shaft is arranged in the avoidance area, such that the revolving shaft and the bin wall are spaced apart from each other along the wall thickness direction of the bin wall, so as to accordingly limit the intervention of the revolving shaft in the wall thickness of the bin wall. 
     The beneficial effects of the maintenance base station provided in the present disclosure are as follows. 
     Compared with the prior art, as for the maintenance base station provided in the present disclosure, partial bin wall of the bin body therein adjacent to the opening is designed to be stretched towards the inner side or the outer side of the bin body, hereby accordingly forming an avoidance area, and the revolving shaft is arranged in the avoidance area. In this way, the revolving shaft is located on the outer side or the inner side of the entire wall thickness of the bin wall, and the revolving shaft and the bin wall of the avoidance area are spaced apart from each other along the wall thickness direction of the bin wall. Because of the design of the avoidance area, the revolving shaft is enabled to be also spaced apart from other parts of the bin wall of the bin body than the avoidance area. In this way, the revolving shaft is located outside the entire wall thickness of the bin wall of the bin body and has no intervention in the wall thickness design of the bin wall of the bin body, and the entire thickness of the bin wall of the bin body can be designed according to the optimization criteria of a product. 
     Therefore, as for the maintenance base station provided in the present disclosure, the design of the position of the revolving shaft and the design of the bin wall thickness of the bin body of the maintenance base station are enabled to be completely independent from each other, such that the dimensional designs of the two are not intervened by each other, and then the two can be respectively separately designed in an optimized way. For example, the bin wall thickness of the bin body is designed to be the thinnest, while the volume of the revolving shaft is designed to be the smallest. Solved is the problem of structural complication, caused by the design of the revolving shaft in the bin wall of the bin body as in the prior art, while the overall structure of the maintenance base station is simplified. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
       In order to more dearly illustrate the technical solutions in the embodiments of the present disclosure, the accompanying drawings required to be used in the description of the embodiments or the prior art will be simply presented to below. Clearly, the accompanying drawings described below merely show certain embodiments of the present disclosure, and for a person ordinarily skilled in the art, other drawings could be obtained according to these accompanying drawings without using any creative efforts. 
         FIG.  1    is a disassembled drawing of a maintenance base station provided in an embodiment of the present disclosure; 
         FIG.  2    is an enlarged drawing of part A in  FIG.  1   ; 
         FIG.  3    is a schematic drawing showing the opened state of the opening of a maintenance base station provided in an embodiment of the present disclosure; 
         FIG.  4    is an enlarged drawing of part B in  FIG.  3   ; 
         FIG.  5    is a schematic drawing showing the blocked state of the opening of a maintenance base station provided in an embodiment of the present disclosure; 
         FIG.  6    is an enlarged drawing of part C in  FIG.  5   ; 
         FIG.  7    is an enlarged drawing of part D in  FIG.  5   ; 
         FIG.  8    is a schematic drawing showing the blocked state of the opening of a maintenance base station provided in an embodiment of the present disclosure; 
         FIG.  9    is a schematic drawing showing the opened state of the opening of a maintenance base station provided in an embodiment of the present disclosure; 
         FIG.  10    is an enlarged drawing of part E in  FIG.  9   ; and 
         FIG.  11    is a schematic drawing of a revolving shaft holder provided in an embodiment of the present disclosure. 
     
    
    
     In the above; respective reference signs in the figures are as follows: 
       10 : bin body;  20 : rotatable cover;  30 : revolving shaft;  40 : revolving shaft holder;  101 : upper bin body;  102 : lower bin body;  103 : debris collection chamber;  104 : opening;  101   a : avoidance groove structure;  101   b : avoidance area;  101   c : groove bottom wall;  101   d : groove side wall;  101   e : upright post structure;  102   a : debris collection port;  102   b : charging contacts;  104   a : first edge;  104   b : second edge;  104   c : notch;  401 : fixing hole structure;  402 : first limiting portion;  403 : guide groove structure;  404 : protrusion structure;  403   a : sliding guide wall;  403   b : support wall;  403   c : second limiting portion;  201 : cover body portion;  202 : sliding guide portion;  203 : connection end;  204 : closed end;  2011 : outer cover body;  2012 : inner cover body;  2013 : sealing rind;  2011   a : first abutting portion;  202   a : sliding guide surface;  202   b : second abutting portion; and  2013   a : U-shaped segment. 
     DETAILED DESCRIPTION OF EMBODIMENTS 
     In order to make the technical problems to be solved by the present disclosure, the technical solutions and beneficial effects clearer, the present disclosure will be further described in detail below with reference to the accompanying drawings and the embodiments. It should be understood that specific embodiments described here are merely used to explain the present disclosure and are not intended to define the present disclosure. 
     It should be clarified that when an element is described as being “fixed” or “arranged” on another element, it may be directly or indirectly fixed or arranged on the another element. When an element is described as being “in connection with” another element, it may be in direct or indirect connection with another element. 
     It should be understood that orientation or position relationships indicated by terms, such as “length”, “width”, “upper”, “lower”, “front”, “rear”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inner”, and “outer”, are orientation or position relationships shown based on the accompanying drawings, merely for facilitating the description of the present disclosure and for simplifying the description, rather than indicating or implying that the specified device or element must have a specific orientation, and be constructed and operated in a certain orientation, and therefore cannot be construed as limiting the present disclosure. 
     In addition, terms such as “first” and “second” are used merely for purpose of description, and cannot be construed as indicating or implying to have importance in relativity, or implicitly suggesting the number of the indicated technical features. Therefore, a feature defined with a term “first” or “second” can explicitly or implicitly comprise one or more of the feature. In the description of the present disclosure, the meaning of the term “multiple” indicates two or more, unless otherwise expressly defined. 
     The maintenance base station provided in the embodiments of the present disclosure will be illustrated now. 
     Referring to  FIGS.  1  to  11   , a maintenance base station provided in an embodiment of the present disclosure comprises a bin body  10 , a rotatable cover  20 , and a revolving shaft  30 , wherein the rotatable cover  20  is in rotatable connection with the bin body  10  via the revolving shaft  30 , the bin body  10  has a debris collection chamber  103  and a opening  104  in communication with the debris collection chamber  103 , and the rotatable cover  20  is configured for blocking or revealing the opening  104 . 
     In the above, partial bin wall of the bin body  10  adjacent to the opening  104  is stretched towards the inner side or the outer side of the bin body  10 , hereby forming an avoidance area  101   b , and the revolving shaft  30  is arranged in the avoidance area  101   b , such that the revolving shaft  30  and the bin wall are spaced apart from each other along the wall thickness direction of the bin wall, so as to accordingly limit the intervention of the revolving shaft  30  in the wall thickness of the bin wall. 
     Compared with the prior art, as for the maintenance base station provided in the present disclosure, partial bin wall of the bin body  10  therein adjacent to the opening  104  is designed to be stretched towards the inner side or the outer side of the bin body  10 , hereby accordingly forming an avoidance area  101   b , and the revolving shaft  30  is arranged in the avoidance area  101   b . In this way, the revolving shaft  30  is located on the outer side or the inner side of the entire wall thickness of the bin wall, and the revolving shaft  30  and the bin wall of the avoidance area  101   b  are spaced apart from each other along the wall thickness direction of the bin wall. Because of the design of the avoidance area  101   b , the revolving shaft  30  is enabled to be also spaced apart from other parts of the bin wall of the bin body  10  than the avoidance area  101   b . In this way, the revolving shaft  30  is located outside the entire wall thickness of the bin wall of the bin body  10  and has no intervention in the wall thickness design of the bin wall of the bin body  10 , and the entire thickness of the bin wall of the bin body  10  can be designed according to the optimization criteria of a product. 
     Therefore, as for the maintenance base station provided in the present disclosure, the design of the position of the revolving shaft  30  and the design of the bin wall thickness of the bin body  10  of the maintenance base station are enabled to be completely independent from each other, such that the dimensional designs of the two are not intervened by each other, and then the two can be respectively separately designed in an optimized way. For example, the bin wall thickness of the bin body  10  is designed to be the thinnest, while the volume of the revolving shaft  30  is designed to be the smallest. Solved is the problem of structural complication, caused by the design of the revolving shaft  30  in the bin wall of the bin body  10  as in the prior art, while the overall structure of the maintenance base station is simplified. 
     Referring to  FIGS.  1 ,  3 , and  5   , in an embodiment, the bin wall of the bin body  10  is a single-layer bin wall. For example, the bin wall of the bin body  10  is composed of a single-layer structure of a rigid plastic material. 
     In other embodiments, the bin wall of the bin body  10  may be a layered structure having two layers or more, the revolving shaft  30  is located outside the entire layered structure of the bin body  10 , and there is no intervention between the revolving shaft  30  and the layered structure of the bin body  10 , that is to say, the thickness design of the whole layered structure is not affected. Of course, even if the bin wall of the bin body  10  is a layered structure having two layers or more, the entire wall thickness of the bin body  10  can still be designed as the optimum thickness of the product. 
     Referring to  FIG.  1   , in an embodiment of the present disclosure, the bin body  10  includes an upper bin body  101  and a lower bin body  102  in connection with the lower end of the upper bin body  101 , the upper bin body  101  and the lower bin body  102  are coaxial and have identical circumferential outlines, the upper end of the upper bin body  101  is provided with the opening  104 , and a debris bag structure for accommodating waste can be put in or taken out of the debris collection chamber  103  of the bin body  10  through the opening  104 . In the present embodiment, a debris bag holder is provided inside the debris collection chamber  103 , and the debris bag structure is in detachable connection with the debris bag holder. 
     In the present embodiment, the lower bin body  102  is provided with charging contacts  102   b  and a debris collection port  102   a , and the debris collection port  102   a  is configured for aligning with a debris discharge port of a cleaning robot, so as to transfer the waste inside the cleaning robot through the debris discharge port of the cleaning robot to the debris collection port  102   a  of the maintenance base station, while the charging contacts  102   b  is configured for providing electric energy for the cleaning robot. 
     Referring to  FIG.  1   , in an embodiment, partial bin wall of the bin body  10  adjacent to the opening  104  is stretched along the wall thickness direction thereof, hereby forming an avoidance groove structure  101   a , and the groove area of the avoidance groove structure  101   a  includes the avoidance area  101   b . In other embodiments, partial bin wall of the bin body  10  adjacent to the opening  104  can be stretched along another direction angled with respect to the wall thickness direction thereof, hereby forming an avoidance groove structure  101   a ; for example, the avoidance groove structure  101   a  is stretched in an oblique direction, such that it deviates from the positive direction of the wall thickness of the bin wall. 
     In the present embodiment, partial bin wall of the bin body  10  adjacent to the opening  104  is stretched along the wall thickness direction thereof towards the inner side of the bin body  10 , hereby forming an avoidance groove structure  101   a . Alternatively, partial bin wall of the bin body  10  adjacent to the opening  104  is stretched along the wall thickness direction thereof towards the outer side of the bin body  10 , hereby forming an avoidance groove structure  101   a , In the present embodiment, it is preferred that partial bin wall of the bin body  10  adjacent to the opening  104  is stretched along the wall thickness direction thereof towards the inner side of the bin body  10 , hereby forming an avoidance groove structure  101   a.    
     Specifically, the partial bin wall of the bin body  10  adjacent to the opening  104  is the part of the bin wall extending along the circumferential direction of the bin body  10  and constituting the edge of the opening  104 , and this part of the bin wall is stretched towards the inner side of the bin body  10 , hereby forming an elongated avoidance groove structure  101   a.    
     Referring to  FIGS.  1 ,  4 , and  6   , this avoidance groove structure  101   a  has an notch opened towards the top of the bin body  10  and an notch opened towards the lateral outside of the bin body  10 , and the two notches communicate with each other to constitute an integral notch. This avoidance groove structure  101   a  has a groove bottom wall  101   c  perpendicular to the bin wall of the bin body  10  and a groove side wall  101   d  provided along the margin of the groove bottom wall  101   c . In the above, the groove bottom wall  101   c  is provided with several upright post structures  101   e  in a vertical state, and the each upright post structure  101   e  is configured to match a fixing hole structure  401  in a revolving shaft holder  40  described below and is configured for being inserted into the fixing hole structure  401  and hereby fixing the revolving shaft holder  40  in the avoidance groove structure  101   a.    
     The maintenance base station further comprises a revolving shaft holder  40 , the revolving shaft holder  40  is provided with a fixing hole structure  401  extending along the height direction of the bin body  10 , and the upright post structure  101   e  described above is inserted into the fixing hole structure  401 , hereby fixedly mounting the revolving shaft holder  40  in the avoidance groove structure  101   a . Further, a screw element can be used to pass through the fixing hole and the upright post structure  101   e  for further fastened connection between the two. Moreover, both shaft ends of the revolving shaft  30  are respectively inserted into the revolving shaft holder  40 , and the rotatable cover  20  is in rotatable connection with revolving shaft holder  40  via revolving shaft  30 . 
     Referring to  FIG.  4   , in an embodiment of the present disclosure, the outer side of the bin wall of the bin body  10  or the side surface of the revolving shaft holder  40  adjacent to the outer side of the bin body  10  is provided with a protruding first limiting portion  402 , which is located in the path of the rotatable cover  20  for rotating from the position of blocking the opening  104  towards the position of revealing the opening  104 , and is configured for abutting against the rotatable cover  20  so as to limit the maximum angle at which the rotatable cover  20  opens the opening  104 . The inner side of the bin wall of the bin body  10  or a region of the revolving shaft holder  40  adjacent to the inner side of the bin body  10  is provided with a second limiting portion  403   c , which is located in the path of the rotatable cover  20  for rotating from the position of revealing the opening  104  towards the position of blocking the opening  104 , and is configured for abutting against the rotatable cover  20  so as to limit the rotatable cover  20  in the position of blocking the opening  104 . 
     In an embodiment, the first limiting portion  402  and the second limiting portion  403   c  are both provided on the bin wall of the bin body  10 , and the first limiting portion  402  and the second limiting portion  403   c  are respectively provided on both sides of the revolving shaft  30  along the radial direction of the revolving shaft  30 ; and the rotatable cover  20  has a first abutting portion  2011   a  and a second abutting portion  202   b , the first abutting portion  2011   a  and the second abutting portion  202   b  are respectively provided on both sides of the revolving shaft  30  along the radial direction of the revolving shaft  30 , and the first abutting portion  2011   a  and the second abutting portion  202   b  respectively match the first limiting portion  402  and the second limiting portion  403   c.    
     In an embodiment, one of the first limiting portion  402  and the second limiting portion  403   c  is provided on the bin wall of the bin body  10 , the other one of the first limiting portion  402  and the second limiting portion  403   c  is provided on the revolving shaft holder  40 , and the first limiting portion  402  and the second limiting portion  403   c  are respectively provided on both sides of the revolving shaft  30  along the radial direction of the revolving shaft  30 ; and the rotatable cover  20  has a first abutting portion  2011   a  and a second abutting portion  202   b , the first abutting portion  2011   a  and the second abutting portion  202   b  are respectively provided on both sides of the revolving shaft  30  along the radial direction of the revolving shaft  30 , and the first abutting portion  2011   a  and the second abutting portion  202   b  respectively match the first limiting portion  402  and the second limiting portion  403   c , For example, the first limiting portion  402  is provided on the outer side of the bin wall of the bin body  10 , preferably the top edge of the outer side of the bin wall or a structure protruding from the top edge towards the outer side of the bin wall, and the second limiting portion  403   c  is provided in the region of the revolving shaft holder  40  adjacent to the inner side of the bin body  10 . 
     Referring to  FIGS.  4  and  10   , in a preferred embodiment, the first limiting portion  402  and the second limiting portion  403   c  are both provided on the revolving shaft holder  40 , and the first limiting portion  402  and the second limiting portion  403   c  are respectively provided on both sides of the revolving shaft  30  along the radial direction of the revolving shaft  30 ; and the rotatable cover  20  has a first abutting portion  2011   a  and a second abutting portion  202   b , the first abutting portion  2011   a  and the second abutting portion  202   b  are respectively provided on both sides of the revolving shaft  30  along the radial direction of the revolving shaft  30 , and the first abutting portion  2011   a  and the second abutting portion  202   b  respectively match the first limiting portion  402  and the second limiting portion  403   c.    
     Specifically, referring to  FIGS.  8  and  11   , the rotatable cover  20  includes a cover body portion  201  and a sliding guide portion  202  in connection with the cover body portion  201 , the cover body portion  201  is configured for blocking or revealing the opening  104 , and the first abutting portion  2011   a  is provided on the cover body portion  201 . The sliding guide portion  202  is provided with a sliding guide surface  202   a , and the second abutting portion  202   b  is provided on the sliding guide surface  202   a  in a protruding manner. The revolving shaft holder  40  is provided with a guide groove structure  403 , and the groove wall of the guide groove structure  403  includes a sliding guide wall  403   a  and two support walls  403   b  oppositely arranged on both sides of the sliding guide wall  403   a ; both shaft ends of the revolving shaft  30  are respectively inserted into the two support walls  403   b , and the sliding guide portion  202  is in rotatable connection with the revolving shaft holder  40  via the revolving shaft  30 ; and both the sliding guide surface  202   a  and the sliding guide wall  403   a  take the revolving shaft  30  as center of rotation, and the second limiting portion  403   c  is concavely arranged on the sliding guide wall  403   a.    
     More specifically; the upper surface of the revolving shaft holder  40  is provided with at least one pair of protrusion structures  404 ; which protrudes from the upper surface; the above mentioned guide groove structure  403  is formed through the inward depression of the upper surface; the two opposite side surfaces and two support walls  403   b  of this pair of protrusion structures  404  are respectively in corresponding connection with each other; and both shaft ends of the revolving shaft  30  are respectively inserted into the two opposite side surfaces of this pair of protrusion structures  404 . 
     When the rotatable cover  20  rotates relative to the bin body  10 , the sliding guide portion  202  rotates relative to the guide groove structure  403 , and the sliding guide surface  202   a  matches the sliding guide wall  403   a  and rotates relative to the sliding guide wall  403   a . At this moment, the second abutting portion  202   b  provided on the sliding guide surface  202   a  can move close to or away from the second limiting portion  403   c  provided on the sliding guide wall  403   a  along the rotation direction, and accordingly abuts against the second limiting portion  403   c  or departs from the second limiting portion  403   c . When the second abutting portion  202   b  abuts against the second limiting portion  403   c , the rotatable cover  20  just blocks the opening  104 ; and when the second abutting portion  202   b  departs from the second limiting portion  403   c  along the opposite direction, the rotatable cover  20  just begins to rotate from the position of blocking the opening  104  towards the position of revealing the opening  104 . When the first abutting portion  2011   a  on the rotatable cover  20  abuts against the first limiting portion  402  on the revolving shaft holder  40 , the rotatable cover  20  is just located at the maximum angle for opening the opening  104 ; and when the first abutting portion  2011   a  departs from the first limiting portion  402  along the opposite direction, the rotatable cover  20  just begins to rotate from the maximum angle for revealing the opening  104  towards the position of blocking the opening  104 . 
     In the above, referring to  FIG.  8   , the cover body portion  201  includes an outer cover body  2011  and an inner cover body  2012 , and the outer cover body  2011  and the inner cover body  2012  are joint together along the thickness direction of the cover body portion  201  and constitute the entity of the cover body portion  201 . In the above, the side surface of the outer cover body  2011  away from the inner cover body  2012  is the cover body outer side surface, while the side surface of the inner cover body  2012  away from the outer cover body  2011  is the cover body inner side surface, and the cover body outer side surface and the cover body inner side surface are arranged oppositely along the thickness direction of the cover body portion  201 . 
     The cover body portion  201  further has an connection end  203  and a dosed end  204  that are arranged oppositely along the radial direction thereof, and the connection end  203  is in rotatable connection with bin body  10  via the revolving shaft  30 . In the above, the edge of the outer cover body  2011  located at the connection end  203  includes the first abutting portion  2011   a  mentioned above for abutting against the first limiting portion  402  on the revolving shaft holder  40 , so as to limit the maximum angle of the rotatable cover  20  for opening the opening  104 . In the above, when the cover body portion  201  is located at the maximum angle for opening the opening  104 , the cover body portion  201  is approximately perpendicular to the opening  104 , or the included angle between the cover body portion  201  and the holder of the opening  104  is approximately 90 degrees. 
     In an embodiment of the present disclosure, along the direction from the connection end  203  of the cover body portion  201  towards the dosed end  204 , the center of gravity of the cover body portion  201  moves dose to the dosed end  204  and away from the connection end  203 . In this way, the cover body portion  201  can be driven by utilizing the dead weight of the cover body portion  201 , so as to automatically flip from the position of revealing the opening  104  towards the position of blocking the opening  104 . Thus, in the embodiment of the present disclosure, the design of a locking portion at the dosed end  204  can be cancelled. In the case of canceling the locking portion, relying on the eccentric force produced by center-of-gravity shift, the cover body portion  201  can automatically block the opening  104 , hereby achieving a relatively good blocking effect. 
     In the present embodiment, following mode for realizing the design of the center-of-gravity shift as mentioned above is utilized; In a situation where the entire material of the cover body portion  201  is consistent, the cover body inner side surface moves away from the cover body outer side surface gradually along the direction from the connection end  203  towards the closed end  204 . That is to say, along the direction from the connection end  203  towards the closed end  204 , the thickness of the cover body portion  201  is gradually increased, and the weight of the cover body portion  201  is gradually increased, thereby realizing the center-of-gravity shift. 
     Further, in the present embodiment, when the cover body portion  201  is located at the position of blocking the opening  104 , the cover body outer side surface is arranged horizontally, while the cover body inner side surface is arranged obliquely; and correspondingly, since the opening  104  and the cover body inner side surface match each other, the opening  104  is arranged obliquely as a whole. 
     Of course, in the present embodiment, when the cover body portion  201  is located at the position of blocking the opening  104 , the cover body outer side surface is arranged obliquely, while the cover body inner side surface is arranged horizontally; and correspondingly, since the opening  104  and the cover body inner side surface match each other, the opening  104  is arranged horizontally as a whole, Compared with the solution in the above paragraph, since the cover body outer side surface is arranged obliquely, when the cover body portion  201  is located at the position of revealing the opening  104 , the offset weight of the cover body outer side surface can weaken the driving force for the rotation of the cover body portion  201  towards the position of blocking the opening  104 , Thus, it is preferred that the cover body outer side surface is arranged horizontally, while the cover body inner side surface is arranged obliquely. 
     In other embodiments, the same purpose can be achieved by adding a counterweight structure to the dosed end  204  or using materials with different weights to generate a gravity difference between the connection end  203  and the dosed end  204 . 
     In an embodiment, the opening  104  mentioned above has a first edge  104   a  and a second edge  104   b  arranged oppositely to the first edge  104   a , a notch  104   c  is provided in the extension of the first edge  104   a  towards the direction being dose to or departing from the second edge  104   b , and it could be understood as a part opened towards a side edge of the bin body  10  included by the slot of the above avoidance groove structure  101   a , the bin body  10  is provided with an avoidance groove structure  101   a  extending from the notch  104   c , and the groove area of the avoidance groove structure  101   a  includes an avoidance area  101   b.    
     Preferably, the notch  104   c  is provided in the extension of the first edge  104   a  towards the direction being dose to the second edge  104   b , a sealing ring  2013  is provided on the side of the rotatable cover  20  close to the opening  104 , and the sealing ring  2013  encloses the circumference side of the rotatable cover  20 . In the present embodiment, it specifically encloses the inner cover body and is dose to the cover body inner side of the inner cover body, and the inner cover body is exposed from the cover body inner side. The sealing ring  2013  cooperates with the edge of the opening  104 , and the sealing ring  2013  is provided with a Li-shaped segment  2013   a  which is in location fit with the notch  104   c , in order to realize the peripheral seal of the part of the avoidance groove structure  101   a.    
     In an embodiment of the present disclosure, the maintenance base station is configured for cooperation with a cleaning robot. The above-mentioned maintenance base station may be a recycling maintenance base station, which is configured for recycling maintenance of waste stored by a cleaning robot, such as debris collection barrel; or a cleaning base station, which is configured for cleaning maintenance of mopping parts or cleaning parts of the cleaning robot; or may also be a maintenance base station that integrates multiple functions such as debris collection maintenance and cleaning maintenance. 
     The above mentioned is merely preferred embodiments of the present disclosure, and is not intended to limit the present disclosure. Any modifications, equivalent substitutions, and improvements made within the spirit and principle of the present disclosure shall all be covered in the scope of protection of the present disclosure.