Patent Publication Number: US-2022231447-A1

Title: Charger

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     The present application is a continuation of International Application No. PCT/CN2020/118640, filed on Sep. 29, 2020, which claims priorities to and the benefits of Chinese Patent Application No. 201911047681.6 and Chinese Patent Application No. 201921849758.7, filed on Oct. 30, 2019. The disclosures of the aforementioned applications are hereby incorporated by reference in their entireties. 
    
    
     FIELD 
     The present disclosure relates to the field of electronic product technologies, and particularly, to a charger. 
     BACKGROUND 
     For chargers available on the market, pins of the charger are folded and stored in a housing when the charger is not in use, and rotated out of the housing when the charger is put in use. Such a folding structure of the charger occupies a large space, as a result, the charger has a relatively large size, low portability, and a poor appearance. 
     SUMMARY 
     In view of the above, it is necessary to provide a charger. 
     A charger is provided. The charger includes: a body including a main body, a first cover body, and a second cover body; and a pin fixedly disposed on the main body. The first cover body and the second cover body are each connected to and rotatable relative to the main body to have a first state and a second state. In the first state, the first cover body and the second cover body are attached to each other, and at least part of a structure of the pin is accommodated in the first cover body and the second cover body. In the second state, the first cover body and the second cover body depart from each other to enable the first cover body and the second cover body to expose the at least part of the structure of the pin to the outside. 
     A charger is provided. The charger includes: a body including a main body and a cover body; and a pin fixedly disposed on the main body. The cover body is connected to and rotatable relative to the main body to have a first state and a second state. In the first state, at least part of a structure of the pin is accommodated in the cover body. In the second state, an end surface of the cover body connected to the main body is flush with an end surface of the main body where the pin is disposed. 
     A charger is provided. The charger includes: a body including a cover body and a body that are connected to each other; and a pin fixed to the main body. The cover body is rotatable relative to the main body to have a first state and a second state. In the first state, at least part of a structure of the pin is accommodated in the cover body. In the second state, the cover body and the main body are stacked on each other, and a minimum distance between the pin and an edge of the body is equal to or greater than a predetermined value. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
       In order to clearly explain technical solutions of embodiments of the present disclosure or in the related art, drawings used in the description of the embodiments or the related art are briefly described below. Obviously, the drawings described below are merely some embodiments of the present disclosure. Based on these drawings, other drawings of the embodiments can be obtained by those skilled in the art without creative efforts. 
         FIG. 1  is a top view of a charger according to an embodiment, in which the charger is in a first state. 
         FIG. 2  is a front view of a charger illustrated in  FIG. 1 . 
         FIG. 3  is a left side view of a charger illustrated in  FIG. 2 . 
         FIG. 4  is a bottom view of a charger illustrated in  FIG. 2 . 
         FIG. 5  is a schematic diagram of a charger illustrated in  FIG. 3 , in which the charger is in a state between a first state and a second state. 
         FIG. 6 a    is a schematic diagram of a charger illustrated in  FIG. 3 , in which the charger is in a second state. 
         FIG. 6 b    is a side view of a charger according to another embodiment, in which the charger is in a second state. 
         FIG. 7 a    is a cross-sectional view of a part A-A of a charger illustrated in  FIG. 2 . 
         FIG. 7 b    is a cross-sectional view of a part A-A of a charger illustrated in  FIG. 2  according to yet another embodiment. 
         FIG. 8  is an exploded view of a charger illustrated in  FIG. 2 . 
         FIG. 9  is a diagram of an assembly process of a charger illustrated in  FIG. 2 , in which a fixing base is mounted on a first housing. 
         FIG. 10  is a cross-sectional view of a part B-B of a structure illustrated in  FIG. 9 . 
         FIG. 11  is a diagram of a further assembly process of a structure illustrated in  FIG. 9 , in which a circuit board is mounted on a first housing. 
         FIG. 12  is a cross-sectional view of a part C-C of a structure illustrated in  FIG. 11 . 
         FIG. 13  is a diagram of a further assembly process of a structure illustrated in  FIG. 11 , in which a second housing is mounted on a first housing. 
         FIG. 14  is a cross-sectional view of a part D-D of a structure illustrated in  FIG. 13 . 
         FIG. 15  is a side view of a charger according to yet another embodiment, in which the charger is in a first state. 
         FIG. 16  is a side view of a charger illustrated in  FIG. 15 , in which the charger is in a state between a first state and a second state. 
         FIG. 17  is a side view of a charger illustrated in  FIG. 15 , in which the charger is in a second state. 
         FIG. 18  is a side view of a charger according to yet another embodiment, in which the charger is in a second state. 
     
    
    
     DESCRIPTION OF EMBODIMENTS 
     The present disclosure will be described comprehensively below with reference to the accompanying drawings for facilitating the understanding of the present disclosure, and the accompanying drawings illustrate preferred embodiments of the present disclosure. However, the present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to facilitate a thorough and comprehensive understanding of the present disclosure. 
     As illustrated in  FIG. 1  to  FIG. 4 , an embodiment provides a charger  10 , which includes a body  20  and a pin  300  fixed to the body  20 . The body  20  includes a main body  100  and a cover body connected to the main body  100 , and the pin is fixedly disposed on an end surface of the main body  100 . The cover body is rotatable relative to the main body  100  to enable the charger  10  to have a first state and a second state. In the first state, the cover body is disposed on and covers the main body  100 , and at least part of a structure of the pin  300  is accommodated in the cover body. In the second state, an end surface of the cover body connected to the main body  100  is flush with an end surface of the main body  100  where the pin  300  is arranged. It can be understood that the expression “being flush with” can mean being coplanar with or allowing a height difference within a certain range, e.g., a height difference between the end surface of the cover body connected to the main body  100  and the end surface of the main body  100  where the pin  300  is arranged is equal to or smaller than 5 mm, 10 mm, etc., which shall fall within the protection scope of the present disclosure. An accommodating space is defined in the main body  100 , and a circuit board  700  is disposed in the accommodating space, and the circuit board  700  is electrically connected to the pin  300 . In an embodiment, the main body  100  has a rectangular parallelepiped or cube structure, and corners of the main body  100  can be rounded to remove ridges from the charger  10 , such that the charger  10  can have good touch feeling. In other embodiments, the main body  100  may also have a cylindrical structure or other structures, which is not specifically limited in the present disclosure. 
     The cover body includes a first cover body  210  and a second cover body  220 , which are respectively fixed to edges of one end of the main body  100 , and respectively fixed to two opposite sides of the main body  100 . The pin  300  is fixed to an end portion of the main body  100  and is located at the same end as the first cover body  210  and the second cover body  220 . A charging interface  109  is defined in the main body  100 . The charging interface  109  and the pin  300  are located at two opposite ends of the main body  100 , respectively. An external electronic component can be electrically connected to the circuit board  700  through the charging interface  109  and thus electrically connected to the pin  300 . After the charger  10  is electrically connected to a power source, the power source can supply power to the external electronic component. 
     As illustrated in  FIG. 1  to  FIG. 4 , in an embodiment, the charger  10  includes a length direction, i.e., a direction Y, a width direction, i.e., a direction X, and a thickness direction, i.e., a direction Z. The pin  300  extends along the length direction, i.e., the direction Y, of the charger  10 . That is, a length direction of the pin  300  is the direction Y The main body  100  includes a first surface  101  and a second surface  102  that are opposite to each other, a first side surface  103  and a second side surface  104  that are opposite to each other, and a first end surface  105  and a second end surface  106  that are opposite to each other. The first surface  101  and the second surface  102  define the thickness direction of the charger  10 , i.e., the direction Z. The first side surface  103  and the second side surface  104  define the width direction of the charger  10 , i.e., the direction X. The first end surface  105  and the second end surface  106  define a length direction of the main body  100 . The length direction of the charger  10 , i.e., the direction Y, is the same as the length direction of the main body  100 . The pin  300  extends out of the main body  100  along the length direction of the charger  10 . In another embodiment, the pin  300  may also extend along the width direction of the charger  10 . The pin may be designed based on practical requirements of the charger  10 . 
     Chamfers and smooth transitions are designed between adjacent surfaces of the main body  100  to provide the charger  10  with a smooth and edge-free feeling. The pin  300  is fixed to the first end surface  105 , the first cover body  210  is fixed to a junction between the first end surface  105  and the first surface  101 , and the second cover body  220  is fixed to a junction between the first end surface  105  and the second surface  102 . It can be understood that a chamfer may be provided or may not be provided between the first end surface  105  and an adjacent surface. 
     As illustrated in  FIG. 5  and  FIG. 6 a   , in an embodiment, the first cover body  210  includes a first outer surface  211  and a first inner surface  212  that are opposite to each other, a first top surface  213  and a first bottom surface  214  that are opposite to each other, and a first left side surface  215  and a first right side surface  216  that are opposite to each other. A smooth transition can be provided between adjacent surfaces of the first cover body  210  to make the first cover body  210  feel smooth. It can be understood that a chamfer may be provided between the first bottom surface  214  and an adjacent surface for a smooth transition, or no chamfer may be provided. The second cover body  220  includes a second outer surface  221  and a second inner surface  222  that are opposite to each other, a second top surface  223  and a second bottom surface  224  that are opposite to each other, and a second left side surface  225  and a second right side surface  226  that are opposite to each other. A smooth transition can be designed between adjacent surfaces of the second cover body  220  to make the second cover body  220  feel smooth. It can be understood that a chamfer may be provided between the second bottom surface  224  and an adjacent surface for a smooth transition, or no chamfer may be provided. 
     As illustrated in  FIG. 5  and  FIG. 6 a   , in an embodiment, the first cover body  210  and the second cover body  220  are rotatable relative to the main body  100  around the width direction of the charger  10 , so as to have the second state and the first state, i.e., the charger  10  has the second state and the first state. In another embodiment, the first cover body  210  and the second cover body  220  may also be rotatable relative to the main body  100  around the length direction of the charger  10 . As illustrated in  FIG. 6 a   , in the second state, the first cover body  210  and the second cover body  220  depart from each other, the first cover body  210  is attached to one side of the main body  100 , the second cover body  220  is attached to the other side of the main body  100 , and end surfaces of the first cover body  210  and the second cover body  220  that are connected to the main body  100  are flush with the end surface of the main body  100  where the pin  300  is disposed, i.e., both the first bottom surface  214  and the second bottom surface  224  are flush with the second end surface  106 , thereby exposing the pin  300  to the outside. It can be understood that “being flush with” can mean being coplanar with or allowing a height difference within a certain range, e.g., a height difference between the end surfaces of the first cover body  210  and the second cover body  220  that are connected to the main body  100  and the end surface of the main body  100  where the pin  300  is arranged is equal to or smaller than 5 mm, 10 mm, or other sizes, which shall also fall within the protection scope of the present disclosure. Similarly, “attached to” can mean that two surfaces are completely connected to each other without or with a spacing. For example, a spacing between the first cover body  210  and a surface of the main body  100  and a spacing between the second cover body  220  and a surface of the main body  100  are both equal to or smaller than 1 mm, 2 mm, or other sizes, which shall also fall within the protection scope of the present disclosure. 
     As illustrated in  FIG. 2  and  FIG. 3 , in the first state, an entire structure of the pin  300  is covered by the first cover body  210  and the second cover body  220 , the first inner surface  212  and the second inner surface  222  are attached to and in contact with each other, the first outer surface  211  is flush with the first surface  101 , the second outer surface  221  is flush with the second surface  102 , the first left side surface  215  is flush with the first side surface  103 , and the first right side surface  216  is flush with the second side surface  104 . One surface being flush with another surface may mean the two surfaces being coplanar or allowing a slight height difference between the two surfaces, both cases shall fall within the protection scope of the present disclosure. When the first inner surface  212  is attached to the second inner surface  222 , the first inner surface  212  and the second inner surface  222  may be completely adhered to each other without or with a spacing, e.g., equal to or smaller than 1 mm, 2 mm, or other sizes. In the first state, an appearance of the charger  10  is an integral rectangular parallelepiped structure, which presents a good visual effect, and the pin  300  is completely covered and hidden. Thus, when a user puts the charger  10  in a pocket or a suitcase, the charger  10  will not damage the surrounding objects. In another embodiment, in the first state, a part of the structure of the pin  300  is covered by the first cover body  210  and the second cover body  220 , and another part of the structure of the pin  300  is exposed out of the first cover body  210  and the second cover body  220 . 
     In an embodiment, a first engagement slot  217  is defined in the first cover body  210  (illustrated in  FIG. 8 ), extends to the first inner surface  212 , and has a shape similar to that of the pin  300 ; and a second engagement slot  227  is defined in the second cover body  220  (illustrated in  FIG. 8 ), extends to the second inner surface  222 , and has a shape similar to that of the pin  300 . In the first state, the first engagement slot  217  is in communication with the second engagement slot  227 , and the pin  300  can be accommodated in the first engagement slot  217  and the second engagement slot  227 . In an embodiment, along the length direction of the pin  300 , i.e., the direction Y, the first engagement slot  217  extends to the first bottom surface  214  and is spaced apart from the first top surface  213  by a certain distance; and the second engagement slot  218  extends to the second bottom surface  224  and is spaced apart from the second top surface  223  by a certain distance. Therefore, in the first state of the charger  10 , the pin  300  is completely hidden and not exposed, and the appearance of the charger  10  presents a structure such as an intact rectangular parallelepiped or cube, thereby ensuring integrity of the appearance of the charger  10 . In another embodiment, along the length direction of the pin  300 , i.e., the direction Y, the first engagement slot  217  extends to the first bottom surface  214  and the first top surface  213 , and the second engagement slot  218  extends to the second bottom surface  224  and the second top surface  223 . That is, lengths of the first cover body  210  and the second cover body  220  are equal to a length of the pin  300  protruding from the main body  100 , such that in the first state of the charger  10 , the pin  300  is flush with both the first top surface  213  and the second top surface  223 . In this case, the charger  10  is short in length, light and thin, and convenient to carry. 
     In an embodiment, two pins  300  are provided, and accordingly, two first engagement slots  217  and two second engagement slots  227  are provided. In another embodiment, one, three, or more pins  300  may be provided, and the number of the first engagement slots  217  and the number of the second engagement slots  227  correspond to the number of the pins  300 . 
     In another embodiment, the first cover body  210  has a hollow box structure with an opening, and the second cover body  220  has a hollow box structure with an opening. In the first state, a closed internal space is defined by the first cover body  210  and the second cover body  220 , the pin  300  is accommodated in the closed internal space defined by the first cover body  210  and the second cover body  220 , and an amount of the pin  300  is not limited. 
     As illustrated in  FIG. 6 a   , in an embodiment, compared with the first state of the charger  10 , in the second state of the charger  10 , the first cover body  210  and the second cover body  220  are each rotated about 180° around the width direction of the charger  10  as an axis. That is, the first cover body  210  and the second cover body  220  in the first state of the charger  10  are rotated 180° relative to the main body  100 , such that the first outer surface  211  is attached and fixed to the first surface  101 , and the second outer surface  221  is attached and fixed to the second surface  102 , and thus the charger  10  is in the second state. 
     As illustrated in  FIG. 6 a   , in an embodiment, two pins  300  are provided and arranged along the width direction of the charger  10 , i.e., the direction X. A distance between one of the two pins  300  and the first surface  101  and a distance between the other one of the two pins  300  and the first surface  101  are both L 1 . A distance between one of the two pins  300  and the second surface  102  and a distance between the other one of the two pins  300  and the second surface  102  are both L 2 . In the second state of the charger  10 , a distance between one of the two pins  300  and the first inner surface  212  and a distance between the other one of the two pins  300  and the first inner surface  212  are both L 3 ; the distance L 3  is equal to a sum of a thickness of the first cover body  210  and the distance L 1 ; an distance between each of the two pins  300  and the second inner surface  222  is L 4 , and the distance L 4  is equal to a sum of a thickness of the second cover body  220  and the distance L 2 . In the second state, a minimum distance between the pin  300  and an edge of the main body  100  is a minimum value of the distance L 3  and the distance L 4 . 
     The safety regulation requirements stipulate that, in the second state of the charger  10 , a distance between the pin  300  and an edge of the charger  10  should be equal to or greater than a predetermined value, and predetermined value can be 6.5 mm or other values, specifically depending upon the usage of the charger  10 . In an embodiment, the distance L 1  is equal to the distance L 2 , i.e., the two pins  300  are symmetrically arranged on the second end surface  106 , and the distance L 3  is equal to the distance L 4 , and accordingly, the minimum distance between each of the two pins  300  and the edge of the main body  100  is L 3  or L 4 . The distance L 1 , e.g., 2.65 mm, is smaller than the predetermined value; and the distance L 3 , e.g., 8.4 mm, is equal to or greater than the predetermined value. In another embodiment, the distance L 1  is unequal to the distance L 2 , i.e., the two pins  300  are asymmetrically arranged on the second end surface  106 . As an example, when the two pins  300  are closer to the first surface  101 , the distance L 1  is smaller than the distance L 2 , and thus the distance L 3  is smaller than the distance L 4 , and accordingly, the minimum distance between the two pins  300  and the edge of the main body  100  is the distance L 3 . As another example, when the two pins  300  are closer to the second surface  102 , the distance L 1  is greater than the distance L 2 , and thus the distance L 3  is greater than the distance L 4 , and accordingly, the minimum distance between the two pins  300  and the edge of the main body  100  is the distance L 4 . In the present embodiment, both the distance L 1  and the distance L 2  are smaller than the predetermined value, and neither the distance L 3  nor the distance L 4  is smaller than the predetermined value. 
     In the first state of the charger  10 , a thickness of the charger  10  is a sum of a size of the pin  300  in the direction Z, the distance L 1 , and the distance L 2 . Both the distance L 1  and the distance L 2  are smaller than the predetermined value. When the distance L 1  and the distance L 2  are small, the thickness of the charger  10  is small. The charger  10  with a relatively small thickness has an aesthetical appearance, a hi-tech sense, and is convenient to carry. In the second state, the charger  10  can meet the safety regulation requirements. That is, in the first state, the charger  10  in the present disclosure has a relatively small thickness and is convenient to carry; and in the second state, the distance between the pin  300  and the edge of the charger  10  is increased by attaching the first cover body  210  and the second cover body  220  to the main body  100 , such that the charger  10  can meet the safety regulation requirements. 
     As illustrated in  FIG. 6 b   , in another embodiment, two pins  300  are arranged along the thickness direction of the charger  10 , i.e., the direction Z. That is, one of the two pins  300  is closer to the first surface  101 , and the other one of the two pins  300  is closer to the second surface  102 . In the second state, the two pins  300  have different distances from an edge of the first cover body  210  (i.e., the first inner surface  212 ), and the two pins have different distances from the first surface  101 ; and the two pins  300  have different distances from an edge of the second cover body  220  (i.e., the second inner surface  222 ), and the two pins have different distances from the second surface  102 . A minimum distance between the pin  300  and the first surface  101  is defined as a distance L 5 , and thus a distance between the pin  300  closer to the first surface  101  and the first surface  101  is the distance L 5 . In the second state, a minimum distance between the pin  300  and the first inner surface  212  is defined as a distance L 7 , and thus a distance between the pin  300  closer to the first surface  101  and the first inner surface  212  is the distance L 7 . A minimum distance between the pin  300  and the second surface  102  is defined as a distance L 6 , and thus a distance between the pin  300  closer to the second surface  102  and the second surface  102  is the distance L 6 . In the second state, a minimum distance between the pin  300  and the second inner surface  222  is defined as a distance L 8 , and thus a distance between the pin  300  closer to the second surface  102  and the second inner surface  222  is the distance L 8 . In the present embodiment, a minimum distance between the pin  300  and an edge of the body  20  is equal to or greater than the predetermined value, i.e., both the distance L 7  and the distance L 8  are equal to or greater than the predetermined value; and along the width direction of the charger  10 , i.e., the direction X, the minimum distance between the pin  300  and the edge of the main body  100  is equal to or greater than the predetermined value, i.e., a minimum distance between the pin  300  and the first side surface  103  is equal to or greater than the predetermined value, and a minimum distance between the pin  300  and the second side surface  104  is equal to or greater than the predetermined value. The distance L 5  may be equal or unequal to the distance L 6 , and both the distance L 5  and the distance L 6  are smaller than the predetermined value; and the distance L 7  can be equal or unequal to the distance L 8 , and both the distance L 7  and the distance L 8  are equal to or greater than the predetermined value. In an embodiment, the predetermined value is 6.5 mm. 
     As illustrated in  FIG. 7 a    and  FIG. 8 , in an embodiment, a first accommodating groove  111  and a second accommodating groove  121  are defined in the first surface  101  and the second surface  102  of the main body  100 , respectively. A third accommodating groove  218  is defined in the first outer surface  211  of the first cover body  210  and opposite to the first engagement slot  217 ; and a fourth accommodating groove  228  is defined in the second outer surface  221  of the second cover body  220  and opposite to the second engagement slot  227 . The first accommodating groove  111  and the third accommodating groove  218  are in communication with each other and have identical depths and widths; and the second accommodating groove  121  and the fourth accommodating groove  228  are in communication with each other and have identical depths and widths. It can be understood that the width of the first accommodating groove  111  may be smaller than or substantially equal to the width of the first surface  101 ; and the width of the second accommodating groove  121  may be smaller than or substantially equal to the width of the second surface  102 . 
     The charger  10  includes a flexible element. The first cover body  210  and the main body  100  are rotatably connected to each other through the flexible element, and the second cover body  220  and the main body  100  are rotatably connected to each other through the flexible element. The flexible element includes a first flexible element  610  and a second flexible element  620 . A part of a structure of the first flexible element  610  is accommodated in the first accommodating groove  111 , and the remaining part of the structure of the first flexible element  610  is accommodated in the third accommodating groove  218 . A thickness of the first flexible element  610  is equal to or substantially equal to the depth of the first accommodating groove  111  or the depth of the third accommodating groove  218 . The first flexible element  610  may be flush with, slightly protrude from, or slightly recess in the first surface  101 . The first flexible element  610  can be adhered or mechanically fixed to the first accommodating groove  111  and the third accommodating groove  218 . A part of a structure of the second flexible element  620  is accommodated in the second accommodating groove  121 , and the remaining part of the structure of the second flexible element  620  is accommodated in the fourth accommodating groove  228 . A thickness of the second flexible element  620  is equal to or substantially equal to the depth of the second accommodating groove  121  or the depth of the fourth accommodating groove  228 . The second flexible element  620  may be flush with, slightly protrude from, or slightly recess in the second surface  102 . The second flexible element  620  can be adhered or mechanically fixed to the second accommodating groove  121  and the fourth accommodating groove  228 . In an embodiment, the first flexible element  610  and the second flexible element  620  are made of a polymer material such as leather, MYLAR film, or silica gel, or other flexible, bendable or foldable materials, which is not specifically limited in the present disclosure. 
     The first cover body  210  and the second cover body  220  are connected to the main body  100  through the first flexible element  610  and the second flexible element  620 , respectively. By virtue of flexibility of the first flexible element  610  and the second flexible element  620 , the first flexible element  610  and the second flexible element  620  is arbitrarily rotatable and bendable at the junction between the first cover body  210  and the main body  100  as well as at the junction between the second cover body  220  and the main body  100 , respectively, such that the charger  10  can be normally opened and closed. As illustrated in  FIG. 3 ,  FIG. 5 , and  FIG. 6 a   , the first cover body  210  and the second cover body  220  can rotate relative to the main body  100  around the width direction of the charger  10 , i.e., the direction X, such that the first cover body  210  and the second cover body  220  can be side by side with respect to the main body  100  along the length direction of the charger  10 , i.e., the direction Y. In this way, in the first state of the charger  10 , the first flexible element  610  and the second flexible element  620  are in an unfolded state. When the charger  10  needs to be opened, the first cover body  210  and the second cover body  220  are rotated around the width direction of the charger  10 , i.e., the direction X, to bend the first flexible element  610  and the second flexible element  620  and to attach the first cover body  210  and the second cover body  220  to two opposite sides of the main body  100 , respectively, and in this case, the charger  10  is in the second state, in which the first flexible element  610  and the second flexible element  620  are in a folded state. 
     It can be understood that the first flexible element  610  may cover the entire region of the first surface  101  and the entire region of the first outer surface  211 , or first flexible element  610  may cover a partial region of the first surface  101  and a partial region of the first outer surface  211 , as long as the first cover body  210  can be connected to the main body  100 , and the first cover body  210  is rotatable relative to the main body  100  around the width direction of the charger  10 , i.e., the direction X. Similarly, the second flexible element  620  may cover the entire region of the second surface  102  and the entire region of the second outer surface  221 , or the second flexible element  620  may cover a partial region of the second surface  102  and a partial region of the second outer surface  221 , as long as the second cover body  220  can be connected to the main body  100 , and the second cover body  220  is rotatable relative to the main body  100  around the width direction of the charger  10 , i.e., the direction X. 
     As illustrated in  FIG. 7 a    and  FIG. 8 , in an embodiment, a first groove  219  is defined in the first cover body  210  and extends to a bottom of the third accommodating groove  218 , a first magnetic member  510  is accommodated in the first groove  219 , and the first flexible element  610  is configured to cover the first magnetic member  510 ; a second groove  229  is defined in the second cover body  220  and extends to a bottom of the fourth accommodating groove  228 , a second magnetic member  520  is accommodated in the second groove  229 , and the second flexible element  620  is configured to cover the second magnetic member  520 . Magnetic forces between the first magnetic member  510  and the second magnetic member  520  provide magnetic forces for mutual attraction between the first cover body  210  and the second cover body  220 . In an embodiment, the first magnetic member  510  and the second magnetic member  520  are both magnets. In another embodiment, one of the first magnetic member  510  and the second magnetic member  520  is a magnet, and the other one of the first magnetic member  510  and the second magnetic member  520  can be a member magnetically attracted by the magnet, such as a common iron block. 
     In another embodiment, the first magnetic member  510  may be located on the first outer surface  211  or the first inner surface  212  of the first cover body  210 , and the second magnetic member  520  may be located on the second outer surface  221  or the second inner surface  222  of the second cover body  220 , and likewise, to provide magnetic forces for mutual attraction between the first cover body  210  and the second cover body  220 . 
     As illustrated in  FIG. 3 , the charger  10  is in the first state, the first cover body  210  and the second cover body  220  are magnetically attracted and fixed to each other by mean of the first magnetic member  510  and the second magnetic member  520 , and the magnetic forces of the first magnetic member  510  and the second magnetic member  520  penetrate the first inner surface  212  and the second inner surface  222 . When the user puts the charger  10  in a pocket or a suitcase, the pin  300  is hidden in the first cover body  210  and the second cover body  220 , and thus the pin  300  is prevented from scratching surrounding objects. In addition, since the first cover body  210  and the second cover body  220  are not easy to be opened, the charger  10  can reliably hide the pin  300  during storage or transportation. 
     As illustrated in  FIG. 3 ,  FIG. 5 , and  FIG. 6 a   , in an embodiment, the magnetic forces for mutual attraction between the first magnetic member  510  and the second magnetic member  520  include a first magnetic force F 1  and a second magnetic force F 2 . The first magnetic force F 1  penetrates the first inner surface  212  and the second inner surface  222  to enable the first cover body  210  and the second cover body  220  to have a tendency of rotating to the first state; and the second magnetic force F 2  penetrates the first outer surface  211 , the second outer surface  221 , and the body  20  to enable the first cover body  210  and the second cover body  220  to have a tendency of rotating to the second state. 
     When the charger  10  is in the first state, the first cover body  210  and the second cover body  220  tightly attract each other through the first magnetic force F 1  between the first magnetic member  510  and the second magnetic member  520 , and thus the first cover body  210  and the second cover body  220  will not depart from each other. When the first cover body  210  and the second cover body  220  need to be opened, the user needs to apply a force to the first cover body  210  or the second cover body  220  to overcome the first magnetic force F 1  between the first magnetic member  510  and the second magnetic member  520 , so as to rotate the first cover body  210  or the second cover body  220  relative to the main body  100 . A critical angle α is an angle between the first cover body  210  and the main body  100  or an angle between the second cover body  220  and the main body  100 . That is, the critical angle α is an angle between a plane where the first outer surface  211  is located and a plane where the first surface  101  is located, or an angle between a plane where the second outer surface  221  is located and a plane where the second surface  102  is located. When one of the first cover body  210  and the second cover body  220  is in the first state or the second state, and the angle between the other one of the first cover body  210  and the second cover body  220  and the main body  100  is the critical angle α, the first magnetic force F 1  and the second magnetic force F 2  are in a balanced state. That is, the first magnetic force F 1  and the second magnetic force F 2  interact with each other to make the first cover body  210  and the second cover body  220  in a balanced state. When one of the first cover body  210  and the second cover body  220  is in the second state, and the angle between the other one of the first cover body  210  and the second cover body  220  and the main body  100  is greater than the critical angle α, the first magnetic force F 1  is greater than the second magnetic force F 2 , and the first cover body  210  and the second cover body  220  can automatically return to the first state. When one of the first cover body  210  and the second cover body  220  is in the first state, and the angle between the other one of the first cover body  210  and the second cover body  220  and the main body  100  is smaller than the critical angle α, the first magnetic force F 1  is smaller than the second magnetic force F 2 , and the first cover body  210  and the second cover body  220  can automatically return to the second state. 
     It is assumed that the user applies a force to the first cover body  210 , and the first cover body  210  is rotated, while the second cover body  220  remains stationary. In this case, the first magnetic force F 1  is greater than the second magnetic force F 2  to enable the first cover body  210  and the second cover body  220  to have a tendency of returning to the first state. When the first cover body  210  in the first state is rotated, but the angle between the first cover body  210  and the main body  100  has not yet reached the critical angle α, the first magnetic force F 1  gradually decreases while the second magnetic force F 2  gradually increases, and the first magnetic force F 1  is greater than the second magnetic force F 2 , thereby enabling the first cover body  210  and the second cover body  220  to have the tendency of returning to the first state. When the first cover body  210  is rotated until the angle between the first cover body  210  and the main body  100  reaches the critical angle α, the first magnetic force F 1  and the second magnetic force F 2  are in the balanced state to enable the first cover body  210  and the second cover body  220  to be in the balanced state. Ideally, the first cover body  210  and the second cover body  220  can remain stationary in the balanced state. As the user continues applying the force, the first magnetic force F 1  continues decreasing while the second magnetic force F 2  continues increasing, and the first magnetic force F 1  is always smaller than the second magnetic force F 2 , the user can stop applying the force to the first cover body  210 , the first cover body  210  and the second cover body  220  are driven by the second magnetic force F 2  to automatically rotate relative to the main body  100 , until both the first cover body  210  and the second cover body  220  are attached to the main body  100 . When the user uses the charger  10  in the second state to provide power supply to an electronic component, the first cover body  210  and the second cover body  220  are fixedly attached to the main body  100  without shaking or rotation, which is convenient for use. It can be understood that, when the charger  10  needs to be opened, the user can also apply a force to the second cover body  220 , and the charger  10  can be opened likewise, and the working principle is same as that described when the user applies a force to the first cover body  210 . 
     As illustrated in  FIG. 3 ,  FIG. 5 , and  FIG. 6 a   , in an embodiment, when the charger  10  is in the second state, the first cover body  210  and the second cover body  220  attract each other tightly through the second magnetic force F 2  between the first magnetic member  510  and the second magnetic member  520 , and thus they will not depart from each other. When the charger  10  needs to be closed, the user needs to apply a force to the first cover body  210  or the second cover body  220  to overcome the second magnetic force F 2  between the first magnetic member  510  and the second magnetic member  520 , so as to rotate the first cover body  210  or the second cover body  220  relative to the main body  100 . It is assumed that the user applies a force to the first cover body  210 , the first cover body  210  is rotated to depart from the main body  100 , while the second cover body  220  maintains to be attached to the main body  100 . With the rotation of the first cover body  210 , the second magnetic force F 2  decreases while the first magnetic force F 1  gradually increases, and the second magnetic force F 2  is always greater than the first magnetic force F 1 . When the first cover body  210  is rotated until the angle between the first cover body  210  and the main body  100  reaches the critical angle α, the first magnetic force F 1  and the second magnetic force F 2  are in the balanced state. That is, the first cover body  210  and the second cover body  220  are in the balanced state under a combined action of the first magnetic force F 1  and the second magnetic force F 2 . Ideally, the first cover body  210  and the second cover body  220  can be in a stationary state. As the user continues applying the force to the first cover body  210 , the balanced state between the first magnetic force F 1  and the second magnetic force F 2  is disturbed to make the first magnetic force F 1  greater than the second magnetic force F 2 , and then the user can thus stop applying the force to the first cover body  210 . The first cover body  210  and the second cover body  220  can be driven by the first magnetic force F 1  to automatically rotate relative to the main body  100 , until the first cover body  210  and the second cover body  220  are attached and fixed to each other, such that the charger  10  is in the first state. In the first state of the charger  10 , during storage, transportation, daily placement, or movement of the charger  10 , the first cover body  210  and the second cover body  220  are tightly fixed to each other, and thus the charger  10  is reliable in hiding the pin  300 , and it is thin in thickness and convenient to carry. It can be understood that, when the charger  10  needs to be closed, the user can also apply a force to the second cover body  220 , and the charger  10  can be closed likewise and the working principle is the same as that described when the user applies a force to the first cover body  210 . 
     In an embodiment, each of the first cover body  210  and the second cover body  220  is partially or entirely made of a magnetic material to generate magnetic forces for mutual attraction between the first cover body  210  and the second cover body  220 . Therefore, the first cover body  210  and the second cover body  220  can be automatically opened and closed according to the same principle as described above, which is not described in detail herein. 
     In an embodiment, a structure of each of the cover body and the main body  100  is partially or entirely made of a magnetic material to generate magnetic forces for mutual attraction between the cover body and the main body. For example, a part of a structure of each of the first cover body  210  and the second cover body  220  is made of a magnetic material to generate magnetic forces for mutual attraction between the first cover body  210  and the second cover body  220 , thereby maintaining the first state of the charger  10 ; and a part of the structure of the main body  100  is made of a magnetic material to generate magnetic forces for mutual attraction between the first cover body  210  and the main body  100  and between the second cover body  220  and the main body  100 , thereby maintaining the second state of the charger  10 . Likewise, the first cover body  210  and the second cover body  220  can be can be automatically opened and closed according to the same principle as described above, which is not described in detail herein. 
     As illustrated in  FIG. 7 b   , in an embodiment, the first magnetic member  510  has a relatively small thickness and a sheet-like structure, and the first magnetic member  510  is fixed to the first inner surface  212 ; the second magnetic member  520  has a relatively small thickness and a sheet-like structure, and the second magnetic member  520  is fixed to the second inner surface  222 , thereby enabling the first cover body  210  and the second cover body  220  to maintain the first state. A third magnetic member  511  and a fourth magnetic member  512  each having a relatively small thickness are fixed to the two opposite sides of the main body  100 , respectively. A magnetic force for mutual attraction is formed between the first magnetic member  212  and the third magnetic member  511 , and a magnetic force for mutual attraction is formed between the second magnetic member  212  and the fourth magnetic member  512 , thereby enabling the first cover body  210  and the second cover body  220  to maintain the second state. The magnetic forces for mutual attraction between the first magnetic member  510  and the second magnetic member  520  enable the charger  10  to have automatic closing function; and the charger  10  can have an automatic opening function by means of the magnetic forces for mutual attraction between the first magnetic member  510  and the third magnetic member  511 , together with the magnetic forces for mutual attraction between the second magnetic member  520  and the fourth magnetic member  512 . 
     As illustrated in  FIG. 7 a    and  FIG. 8 , in an embodiment, the main body includes a first housing  110  and a second housing  120 . Both the first housing  110  and the second housing  120  are open shell-like structures. An accommodating space is defined by the first housing  110  and the second housing  120 . A circuit board  700  is mounted in the accommodating space. One end of the circuit board  700  is electrically connected to the pin  300 , and the other end of the circuit board  700  can be electrically connected to an external electronic component to electrically connect the external electronic component to the pin  300 . In this way, when the charger  10  is connected to a power source, the power source can supply power to the external electronic component through the charger  10 . It can be understood that the external electronic component may be an intermediate connection line such as a data cable, or an electronic device such as a mobile phone, a watch, a tablet, or a computer, or a combination of an electronic device and a data cable corresponding to the electronic device, and the external electronic component is not specifically limited in the present disclosure. 
     A charging interface  109  is defined in the main body, and penetrates a part of an edge of the first housing  110 , a part of an edge of the second housing  120 , and the first end surface  105 . The external electronic component can be electrically connected to the circuit board  700  through the charging interface  109 , or electrically connected to contacts extending from the circuit board  700 , so as to be electrically connected to the circuit board  700 . 
     As illustrated in  FIG. 7 a    and  FIG. 8 , in an embodiment, the charger  10  includes a fixing base  400 , and the pin  300  is fixed to the fixing base  400 . A first channel  410  and a second channel  420  that are opposite to each other are defined in the fixing base  400 , a first convex rib  119  is provided on the first housing  110 , and a second convex rib  129  is provided on the second housing  120 . The fixing base  400  is mounted between the first housing  110  and the second housing  120 , the first convex rib  119  is engaged in the first channel  410 , and the second convex rib  129  is engaged in the second channel  420 , such that the fixing base  400  is fixedly mounted between the first housing  110  and the second housing  120 . A main board and the fixing base  400  are electrically connected to each other via a wire  710 , so as to electrically connect the main board to the pin  300 . 
     In an embodiment, a method for preparing the charger  10  is provided. The method includes: providing the pin  300 , the main body  100 , the first cover body  210 , and the second cover body  220 , a magnetic force being formed between the first cover body  210  and the second cover body  220 ; fixing the pin  300  to the main body  100 ; and rotatably connecting the first cover body  210  and the second cover body  220  to two opposite sides of the main body  100 , respectively. The first cover body  210  and the second cover body  220  have the second state and the first state relative to the main body  100 . In the second state, the first cover body  210  is attached and fixed to the second cover body  220 , and the at least part of the structure of the pin  300  is covered by the first cover body  210  and the second cover body  220 . In the first state, the first cover body  210  and the second cover body  220  are attached and fixed to two sides of the main body  100 , respectively. 
     As illustrated in  FIG. 9  and  FIG. 10 , in an embodiment, the pin  300  and the fixing base  400  are fixed to each other, or the pin  300  and the fixing base  400  formed as one piece can be purchased. It can be understood that the pin  300  can be electrically connected to the fixing base  400 , or a part of a structure on the fixing base  400 . In this way, after the circuit board  700  is connected to the fixing base  400 , the circuit board  700  can be electrically connected to the pin  300 . The fixing base  400  is fixed to the first housing  110  to enable the first convex rib  119  to be engaged in and fixed to the first channel  410 . 
     As illustrated in  FIG. 11  and  FIG. 12 , in an embodiment, the circuit board  700  is provided and fixed in the first housing  110 . The circuit board  700  and the fixing base  400  are electrically connected to each other via the wire  710 . It can be understood that the fixing base  400  has a structure capable of conducting electricity and electrically connecting to the pin  300 , such that the circuit board  700  can be electrically connected to the pin  300 . 
     As illustrated in  FIG. 13  and  FIG. 14 , in an embodiment, the second housing  120  and the first housing  110  are assembled and fixed to each other. In an embodiment, the second housing  120  and the first housing  110  are fixed to each other through an ultrasonic hot melting process. In another embodiment, the second housing  120  and the first housing  110  can also be fixed to each other through any other process. The second convex rib  129  is engaged in the second channel  420 , and the first housing  110  clamps and fixes the fixing base  400  firmly along with the second housing  120 , thereby prolonging the plug-in/out life of the charger  10 . 
     As illustrated in  FIG. 2  and  FIG. 7 a   , in an embodiment, the first magnetic member  510  is fixed in the first groove  219 , and the second magnetic member  520  is fixed in the second groove  229 . The first flexible element  610  is adhesively or mechanically fixed to the first accommodating groove  111  and the third accommodating groove  218 , and covers the first magnetic member  510 , thereby connecting the first cover body  210  to the first housing  110 . The second flexible element  620  is adhesively or mechanically fixed to the second accommodating groove  121  and the fourth accommodating groove  228 , and covers the second magnetic member  520 , thereby connecting the second cover body  220  to the second housing  120 . Due to the flexibility of the first flexible element  610  and the second flexible element  620 , the first cover body  210  and the second cover body  220  can open or close the charger  10  along a certain trajectory, so as to expose or hide the pin  300 . 
     In the first state of the charger  10 , due to a magnetic field principle of the first magnetic member  510  and the second magnetic member  520 , when the first cover body  210  or the second cover body  220  is opened by the critical angle α, the second magnetic force F 2  between the first magnetic member  510  and the second magnetic member  520  is greater than the first magnetic force F 1  between the first magnetic member  510  and the second magnetic member  520 . In this case, the first cover body  210  and the second cover body  220  can be automatically opened and maintain an open state all the time. Similarly, in the second state of the charger  10 , when the first cover body  210  or the second cover body  220  is closed to a position corresponding to the critical angle α, the second magnetic force F 2  between the first magnetic member  510  and the second magnetic member  520  is smaller than the first magnetic force F 1  between the first magnetic member  510  and the second magnetic member  520 . In this case, the first cover body  210  and the second cover body  220  can automatically close, and the magnetic force maintains the first state. 
     The charger  10  has a relatively small thickness. The charger  10 , when not in the use, can be kept in the first state, in which the pin  300  is hidden to provide an intact appearance and portability, and the pin  300  is prevented from damaging surrounding objects. When the charger  10  is in the second state, the first cover body  210  and the second cover body  220  are attached to the main body  100  to meet safety regulation requirements of the charger  10 . Due to magnetic field characteristics of the first magnetic member  510  and the second magnetic member  520 , after the first cover body  210  or the second cover body  220  is opened by the critical angle α or closed to the position corresponding to the critical angle α, the first cover body  210  and the second cover body  220  can interact to realize the automatic opening or closing function, thereby improving user experience. The first flexible element  610  and the second flexible element  620  connect the first cover body  210  and the second cover body  220  to the main body  100 , respectively, and a rotating mechanism can be omitted. In addition, the first flexible element  610  and the second flexible element  620  are the appearance of the charger  10  and the charger  10  has an intact appearance due to the visually complete planes. 
     As illustrated in  FIG. 15  to  FIG. 17 , in an embodiment, one cover body  80  is provided, and two pins  300  are provided and arranged along the width direction of the body  20 , i.e., the direction X. The cover body  80  is rotatably connected to the main body  100 . The cover body  80  is rotatable relative to the main body  100  to have the first state and the second state. In the first state, the cover body  80  is configured to cover the end portion of the main body  100 , and the at least part of the structure of the pin  300  can be accommodated in the cover body  80 . The structure of the pin  300  can be completely accommodated in the cover body  80 , or a part of the structure of the pin  300  may be exposed. In the second state, the cover body  80  is opened and stacked on one side of the main body, and the cover body  80  is attached to a surface of the main body. The expression “attached to” means that no spacing or a small spacing exists therebetween. A distance between the pin  300  and a surface of the cover body  80  facing away from the main body  100 , as well as a distance between the pin  300  and a surface of the main body  100  facing away from the cover body  80  are both equal to or greater than the predetermined value, in order to ensure that the charger  10  meets the safety regulation requirements. In an embodiment, the predetermined value is 6.5 mm. In other embodiments, the preset value may also be other values. 
     As illustrated in  FIG. 15  to  FIG. 17 , in an embodiment, the cover body  80  includes a sixth surface  801  and a seventh surface  802  that are opposite to each other, and a sixth end surface  803  and a seventh end surface  804  that are opposite to each other. The sixth end surface  803  is connected to one end of the sixth surface  801  and the seventh surface  802 , and the seventh end surface  804  is connected to the other end of the sixth surface  801  and the seventh surface  802 . As illustrated in  FIG. 15 , in the first state, the sixth end surface  803  is attached to the second end surface  106 , the first surface  101  is flush with the sixth surface  801 , and the second surface  102  is flush with the seventh surface  802 . The cover body  80  is turned over and rotated to the second state. As illustrated in  FIG. 17 , in the second state, the seventh surface  802  is attached to the second surface  102 , and the sixth end surface  803  is flush with the second end surface  106 . It can be understood that the cover body  80  can also be turned over in an opposite direction, and accordingly, in the second state, the sixth surface  801  can be attached to the first surface  101 , and the sixth end surface  803  can be flush with the second end surface  106 . 
     As illustrated in  FIG. 15  to  FIG. 17 , in an embodiment, the charger  10  includes a third flexible element  630 , and the cover body  80  and the main body  100  are connected to each other through the third flexible element  630  to perform a rotation. Specifically, a part of a structure of the third flexible element  630  is attached and fixed to the second surface  102 , and the remaining part of the structure is attached and fixed to the seventh surface  802  of the cover body  80 . The third flexible element  630  has flexibility and is foldable, such that the cover body  80  is rotatable relative to the main body  100  to be located in the first state and the second state. It can be understood that a groove may be defined in each of the second surface  102  and the seventh surface  802 , and the third flexible element  630  is fixed in the groove to be flush with the second surface  102  and the seventh surface  802 , thereby presenting an aesthetic appearance. 
     In an embodiment, at least part of a structure of the cover body  80  or the main body  100  is made of a magnetic material to generate magnetic forces for mutual attraction between the cover body  80  and the main body  100 . 
     As illustrated in  FIG. 15  to  FIG. 17 , in an embodiment, a sixth magnetic member  901  and a seventh magnetic member  902  are provided in the cover body  80 . The sixth magnetic member  901  is closer to the sixth end surface  803 , and the seventh magnetic member  902  is closer to the seventh surface  802 . An eighth magnetic member  903  closer to the second end surface  106  and a ninth magnetic member  904  closer to the second surface  102  are provided in the main body. A magnetic force for mutual attraction is generated between the sixth magnetic member  901  and the eighth magnetic member  903 ; and a magnetic force for mutual attraction is generated between the seventh magnetic member  902  and the ninth magnetic member  904 . In the first state, the cover body  80  and the main body  100  are magnetically attracted and fixed to each other through the magnetic forces for mutual attraction between the sixth magnetic member  901  and the eighth magnetic member  903 . In the second state, the cover body  80  and the main body  100  are magnetically attracted and fixed to each other through the magnetic forces for mutual attraction between the seventh magnetic member  902  and the ninth magnetic member  904 . During the rotation of the cover body  80 , when a magnetic force between the sixth magnetic member  901  and the eighth magnetic member  903  is greater than a magnetic force between the seventh magnetic member  902  and the ninth magnetic member  904 , the cover body  80  can automatically rotate to the first state and can be maintained in the first state. When the magnetic force between the sixth magnetic member  901  and the eighth magnetic member  903  is smaller than the magnetic force between the seventh magnetic member  902  and the ninth magnetic member  904 , the cover body  80  can automatically rotate to the second state and ca be maintained in the second state. 
     In another embodiment, the sixth magnetic member  901  may also be fixed to the sixth end surface  803  in such a manner that the sixth magnetic member  901  is flush with the sixth end surface  803 , or the sixth magnetic member  901  slightly protrudes from or recesses in the sixth end surface  803 . The seventh magnetic member  902  may be fixed to the seventh surface  802  in such a manner that the seventh magnetic member  902  is flush with the seventh end surface  802 , or the seventh magnetic member  902  slightly protrudes from or recesses in the seventh end surface  802 . The eighth magnetic member  903  may be fixed to the second end surface  106  in such a manner that the eighth magnetic member  903  is flush with the second end surface  106 , or the eighth magnetic member  903  slightly protrudes from or recesses in the second end surface  106 . The ninth magnetic member  904  may be fixed to the second surface  102  in such a manner that the ninth magnetic member  904  is flush with the second surface  102 , or the ninth magnetic member  904  slightly protrudes from or recesses in the second surface  102 . 
     As illustrated in  FIG. 18 , in an embodiment, two pins  300  are arranged along the thickness direction of the charger  10 , i.e., the direction Z. That is, one of the two pins  300  is closer to the first surface  101 , and the other one of the two pins  300  is closer to the second surface  102 . The two pins  300  have different distances from the first surface  101 , and the two pins  300  have different distances from the second surface  102 . In the second state, the two pins  300  have different distances from an edge i.e., the sixth surface  801 , of the cover body  80 . In the present embodiment, in the second state, the minimum distance between the pin  300  and the edge of the body  20  is equal to or greater than the predetermined value, the distance between the pin  300  closer to the first surface  101  and the first surface  101  is equal to or greater than the predetermined value, the distance between the pin  300  farther from the first surface  101  and the sixth surface  801  is equal to or greater than the predetermined value, a distance between each of the two pins  300  and the first side surface  103  is equal to or greater than the predetermined value, and a distance between each of the two pins  300  and the second side surface  104  is equal to or greater than the predetermined value. In an embodiment, the predetermined value is 6.5 mm. 
     The technical features described in the above embodiments can be combined arbitrarily. For brevity of description, not all the possible combinations of the technical features in the above embodiments are described. However, a combination of these technical features should be construed as falling within the scope of the present disclosure, as long as no contradiction exists in the combination. 
     The above embodiments illustrate merely some implementations of the present disclosure. Although the above embodiments are described specifically and in detail, the description should not be construed as the limitations on the scope of the present disclosure. It should be pointed out that, various modifications and improvements can be made by those skilled in the art without departing from the concept of the present disclosure, and they shall fall within the protection scope of the present disclosure as defined by the appended claims.