Magnetic attraction charging structure and education robot

Abstract

The utility model provides a magnetic attraction charging structure and an educational robot, the magnetic attraction charging structure comprises a first connector and a second connector which are mutually connected, the first connector comprises a first shell, a first electric contact exposed out of the first shell and a first magnetic attraction piece arranged on the first shell; the first shell is provided with a fool-proof groove; the second connector comprises a second shell, a second electric contact arranged on the second shell in a protruding mode and a second magnetic attraction piece arranged on the second shell, the second shell is provided with a fool-proof protrusion in a protruding mode, and the height of the fool-proof protrusion is larger than the protruding height of the second electric contact. According to the magnetic attraction charging structure and the education robot provided by the utility model, the connection direction of the first connector and the second connector is limited through mutual cooperation of the fool-proof structures, and the connectors are prevented from being inserted reversely. Moreover, the height of the fool-proof bulge is greater than the bulge height of the second electric contact, so that when the second magnetic attraction piece attracts the iron piece, the iron piece can be stopped, and the iron piece is prevented from conducting the second electric contact.

Description

Technical Field

[0001] This utility model belongs to the field of robot technology, and more specifically, it relates to a magnetic charging structure and an educational robot. Background Technology

[0002] Connectors are commonly used to connect electronic devices to power cords and between electronic devices themselves. Connectors typically have contacts, pins, and other structural elements. To prevent the male and female ends from being inserted incorrectly, magnets are usually included in the connector. The magnetic repulsion between the magnets alerts the user to the incorrect insertion direction. However, this method of preventing incorrect insertion via magnetic repulsion is unreliable. Incorrect insertion can easily cause a short circuit within the device. Furthermore, magnetic connectors tend to attract ferrous components, potentially creating a short circuit between adjacent contacts. Utility Model Content

[0003] The purpose of this utility model embodiment is to provide a magnetic charging structure and an educational robot to solve the technical problems of incorrect connector insertion direction and easy attraction of iron parts leading to short circuits in the prior art.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is: to provide a magnetic charging structure, including a first connector and a second connector for interconnection.

[0005] The first connector includes a first housing, a first electrical contact exposed in the first housing, and a first magnetic suction element disposed in the first housing; the first housing has a foolproof groove;

[0006] The second connector includes a second housing, a second electrical contact protruding from the second housing, and a second magnetic member disposed on the second housing. The second electrical contact is used to make contact and conduct with the first electrical contact, and the second magnetic member is used to magnetically attract with the first magnetic member. The second housing protrusion is provided with a foolproof protrusion for cooperating with the foolproof groove, and the height of the foolproof protrusion is greater than the protrusion height of the second electrical contact.

[0007] Optionally, the anti-mistake groove is an arc-shaped groove with a notch, and the anti-mistake protrusion is an arc-shaped protrusion with a notch.

[0008] Optionally, the anti-mistake groove is an elongated oval groove with a notch, and the anti-mistake protrusion is an elongated oval protrusion with a notch.

[0009] Optionally, the anti-mistake groove is disposed around the first electrical contact, and the anti-mistake protrusion is disposed around the second electrical contact.

[0010] Optionally, the first magnetic attractor includes a plurality of first magnetic attracting units and is arranged around the first electrical contact, and the second magnetic attractor includes a plurality of second magnetic attracting units and is arranged around the second electrical contact; the first magnetic attracting units and the second magnetic attracting units are magnetically attracted to each other in a one-to-one manner.

[0011] Optionally, the first housing has a first contact surface for contacting the second housing, and the second housing has a second contact surface for contacting the first housing; on the side near the first contact surface, at least two of the first magnetic units have different magnetic poles; on the side near the second contact surface, at least two of the second magnetic units have different magnetic poles.

[0012] Optionally, there are two first magnetic units, with the magnetic poles of the two first magnetic units opposite on the side near the first contact surface; there are also two second magnetic units, with the magnetic poles of the two second magnetic units opposite on the side near the second contact surface.

[0013] Optionally, the two first magnetic attraction units are respectively disposed on opposite sides of the first electrical contact, and the two second magnetic attraction units are respectively disposed on opposite sides of the second electrical contact.

[0014] Optionally, the height difference between the top of the anti-fooling protrusion and the top of the second electrical contact is greater than 2 mm.

[0015] This utility model also provides an educational robot, including the above-mentioned magnetic charging structure.

[0016] The beneficial effects of the magnetic charging structure provided by this utility model are as follows: Compared with the prior art, the magnetic charging structure of this utility model includes a first connector and a second connector. When the first connector and the second connector are connected to each other, the anti-misalignment protrusion extends into the anti-misalignment groove, the first magnetic element and the second magnetic element magnetically attract each other, and the first electrical contact and the second electrical contact contact each other, realizing the conductive connection between the first connector and the second connector. The mutual cooperation of the anti-misalignment structure restricts the connection direction of the first connector and the second connector, preventing the connectors from being inserted backwards. Moreover, the height of the anti-misalignment protrusion is greater than the protrusion height of the second electrical contact. When the second magnetic element attracts a ferrous part, it can stop the ferrous part, preventing the ferrous part from conducting the second electrical contact. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 The three-dimensional structure of the magnetic charging structure provided in the embodiment of this utility model Figure 1 ;

[0019] Figure 2 The three-dimensional structure of the magnetic charging structure provided in the embodiment of this utility model Figure 2 ;

[0020] Figure 3 A schematic diagram of the structure of the first connector provided in an embodiment of this utility model;

[0021] Figure 4 A schematic diagram of the structure of the second connector provided in an embodiment of this utility model.

[0022] The following are the labeling elements in the figure:

[0023] 10-First connector; 11-First housing; 111-First contact surface; 12-First electrical contact; 13-Anti-foolproof groove; 14-First magnetic element; 141-First magnetic unit; 20-Second connector; 21-Second housing; 211-Second contact surface; 22-Second electrical contact; 23-Anti-foolproof protrusion; 24-Second magnetic element; 241-Second magnetic unit. Detailed Implementation

[0024] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0025] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0026] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0028] Connectors are commonly used to connect electronic devices to power cords and between electronic devices themselves. Connectors typically have contacts, pins, and other structural elements. To prevent the male and female ends from being inserted incorrectly, magnets are usually included in the connector. The magnetic repulsion between the magnets alerts the user to the incorrect insertion direction. However, this method of preventing incorrect insertion via magnetic repulsion is unreliable. Incorrect insertion can easily cause a short circuit within the device. Furthermore, magnetic connectors tend to attract ferrous components, potentially creating a short circuit between adjacent contacts.

[0029] To alleviate and solve the above-mentioned technical problems, this utility model proposes a magnetic charging structure and an educational robot. The magnetic charging structure can be applied to educational robots, service robots, electronic terminal devices, and other fields. The magnetic charging structure includes a first connector 10 and a second connector 20. The first connector 10 and the second connector 20 are prevented from being inserted incorrectly by the cooperation of a foolproof protrusion 23 and a foolproof groove, thus avoiding short circuits. Furthermore, the height of the foolproof protrusion 23 on the second housing 21 is greater than the height of the second electrical contacts 22. Even if the second magnetic component 24 comes into contact with a metal object during normal placement, when the metal object is attracted to the second connector 20, the foolproof protrusion 23 will prevent the metal object from conducting through the second electrical contacts 22, thus avoiding short circuits.

[0030] The magnetic charging structure provided in the embodiments of this utility model will now be described.

[0031] Please refer to the following: Figure 1 and Figure 2 The magnetic charging structure includes a first connector 10 and a second connector 20 for interconnection.

[0032] The first connector 10 includes a first housing 11, a first electrical contact 12 exposed in the first housing 11, and a first magnetic member 14 disposed in the first housing 11. The first housing 11 has a foolproof groove 13.

[0033] The second connector 20 includes a second housing 21, a second electrical contact 22 protruding from the second housing 21, and a second magnetic member 24 disposed on the second housing 21. The second electrical contact 22 is used to make contact and conduct with the first electrical contact 12, and the second magnetic member 24 is used to magnetically attract with the first magnetic member 14. The second housing 21 is provided with a foolproof protrusion 23 for cooperating with the foolproof groove 13. The height of the foolproof protrusion 23 is greater than the protrusion height of the second electrical contact 22.

[0034] Both the first connector 10 and the second connector 20 are electrical connectors, one of which is a female connector and the other is a male connector. The first connector 10 can be installed on the main structure of the electronic device, and the second connector 20 can be installed on a power cord or other electronic module. When the first connector 10 and the second connector 20 are connected to each other, they are electrically conductive.

[0035] The first connector 10 includes a first housing 11, a first electrical contact 12, and a first magnetic member 14. Both the first electrical contact 12 and the first magnetic member 14 are disposed on the first housing 11, and the first housing 11 has a foolproof groove 13. The second connector 20 includes a second housing 21, a second electrical contact 22, and a second magnetic member 24. Both the second electrical contact 22 and the second magnetic member 24 are disposed on the first housing 11, and the second housing 21 has a foolproof protrusion 23. When the first connector 10 and the second connector 20 are connected, the foolproof protrusion 23 extends into the foolproof groove, the first magnetic member 14 and the second magnetic member 24 magnetically attract each other, structurally connecting the first connector 10 and the second connector 20. The first electrical contact 12 and the second electrical contact 22 contact each other, electrically connecting the first connector 10 and the second connector 20.

[0036] The anti-misalignment protrusion 23 and anti-misalignment groove 13 work together to prevent incorrect connection, ensuring that the first connector 10 and the second connector 20 can only be connected in a specific direction, preventing reverse insertion. For example, both the first connector 10 and the second connector 20 are slotted connectors. The top and bottom sides (the larger sides) of the first connector 10 are the first side and the second side, respectively, and the top and bottom sides of the second connector 20 are also the first side and the second side, respectively. They are correctly connected only when the first side of the first connector 10 and the first side of the second connector 20 are on the same side. Therefore, the anti-misalignment protrusion 23 and anti-misalignment groove 13 ensure that the first connector 10 and the first side of the second connector 20 can only be connected when they are on the same side. Otherwise, the anti-misalignment protrusion 23 and the first housing 11 prevent the first connector 10 and the second connector 20 from connecting.

[0037] When the first connector 10 and the second connector 20 are not plugged into each other, both connectors are in a free-placed state, and the iron parts are easily attracted to the magnetic clasp. When the iron parts are attracted to the second magnetic clasp 24, the second electrical contact 22 will not come into contact with the iron parts due to the stop of the anti-fooling protrusion 23, and therefore a short circuit will not occur at the second electrical contact 22. It should be noted that the surface of the second housing 21 where the second electrical contact 22 is provided is the reference surface. The height of the anti-fooling protrusion 23 and the protrusion height of the second electrical contact 22 are relative to the reference plane, which can be understood as the distance between the top of the anti-fooling protrusion 23 and the reference plane, and the distance between the top of the second electrical contact 22 and the reference plane.

[0038] The magnetic charging structure in the above embodiment includes a first connector 10 and a second connector 20. When the first connector 10 and the second connector 20 are connected to each other, the anti-misalignment protrusion 23 extends into the anti-misalignment groove 13, the first magnetic attractor 14 and the second magnetic attractor 24 magnetically attract each other, and the first electrical contact 12 and the second electrical contact 22 contact each other, realizing the conductive connection between the first connector 10 and the second connector 20. The mutual cooperation of the anti-misalignment structure restricts the connection direction of the first connector 10 and the second connector 20, preventing the connectors from being inserted backwards. Moreover, the height of the anti-misalignment protrusion 23 is greater than the protrusion height of the second electrical contact 22. When the second magnetic attractor 24 attracts a ferrous part, it can stop the ferrous part, preventing the ferrous part from conducting the second electrical contact 22.

[0039] Please refer to some embodiments of this utility model. Figure 3 and Figure 4 The anti-mistake groove 13 is an arc-shaped groove with a notch, and the anti-mistake protrusion 23 is an arc-shaped protrusion with a notch. When the arc-shaped groove has no notch, it is a closed annular structure, and when the arc-shaped protrusion has no notch, it is also a closed annular structure. After the arc-shaped groove and the arc-shaped protrusion are provided with notches, the two can only be inserted in one direction and cannot be inserted in the opposite direction, thus playing an anti-mistake role.

[0040] The arc-shaped protrusions and arc-shaped grooves have a smooth structure. In particular, the arc-shaped protrusions, due to their placement on the surface of the second housing 21, have a smooth structure that makes the surface of the second connector 20 even smoother and prevents scratches to the user.

[0041] In some embodiments, the central angles corresponding to the arc-shaped protrusions and arc-shaped grooves are greater than 180 degrees, and the central angles corresponding to the notches are less than 180 degrees. Thus, when the arc-shaped anti-misalignment groove 13 with a notch and the arc-shaped anti-misalignment protrusion 23 with a notch are interlocked, they can provide horizontal (perpendicular to the interlocking direction) limiting for the first housing 11 and the second housing 21, thereby enabling more precise alignment of the first electrical contact 12 and the second electrical contact 22. In other words, the anti-misalignment protrusion 23 and the anti-misalignment groove 13 not only have anti-misalignment functions but also provide alignment functions for the connection of the first connector 10 and the second connector 20.

[0042] In some embodiments, the anti-mistake groove 13 is a circular groove with a notch, and the anti-mistake protrusion 23 is a circular protrusion with a notch.

[0043] In some embodiments, the anti-mistake groove 13 is an elliptical groove with a notch, and the anti-mistake protrusion 23 is an elliptical protrusion with a notch.

[0044] In some embodiments, please refer to Figure 3 and Figure 4 The anti-mistake groove 13 is an elongated oval groove with a notch, and the anti-mistake protrusion 23 is an elongated oval protrusion with a notch. An elongated oval can also be understood as a kidney-shaped shape. The elongated oval protrusions enclose an elongated oval space, which is relatively large, allowing multiple second electrical contacts 22 to be designed within this space. Furthermore, the elongated oval protrusions and grooves are easier to align than perfectly round ones during insertion, eliminating the need for circumferential rotation for alignment.

[0045] In other embodiments, the anti-mistake groove 13 and the anti-mistake protrusion 23 may also be rectangular or the like.

[0046] Please refer to some embodiments of this utility model. Figure 3 and Figure 4 The anti-mistake groove 13 is disposed around the first electrical contact 12, and the anti-mistake protrusion 23 is disposed around the second electrical contact 22. The anti-mistake protrusion 23 is disposed on the outer periphery of the second electrical contact 22, which can protect the second electrical contact 22 and make it less likely for other objects such as iron parts to come into contact with the second electrical contact 22. After the first connector 10 and the second connector 20 are connected to each other, the anti-mistake protrusion 23 extends into the anti-mistake groove 13, which can block the connection area of ​​the two connectors and reduce the entry of dust and other objects into the gap between the first connector 10 and the second connector 20. When the anti-mistake protrusion 23 is disposed on the outer periphery of the second electrical contact 22, the anti-mistake groove 13 is also disposed on the outer periphery of the first electrical contact 12.

[0047] In some embodiments, the first electrical contact 12 includes a plurality of first contact units, which are arranged in a line or in an array. When the plurality of first contact units are arranged in a line, the anti-misalignment groove 13 may be oblong to match the arrangement shape of the first contact units.

[0048] In some embodiments, the second electrical contact 22 includes a plurality of second contact units, which are arranged in a line or in an array. When the plurality of second contact units are arranged in a line, the anti-fooling protrusion 23 may be oblong to match the arrangement shape of the second contact units.

[0049] Please refer to some embodiments of this utility model. Figure 3 and Figure 4 The first magnetic attractor 14 includes multiple first magnetic attracting units 141 arranged around the first electrical contact 12, and the second magnetic attractor 24 includes multiple second magnetic attracting units 241 arranged around the second electrical contact 22; the first magnetic attracting units 141 and the second magnetic attracting units 241 are magnetically attracted to each other in a one-to-one manner. There are multiple first magnetic attractors 14 and multiple second magnetic attractors 24, which are respectively arranged around the first electrical contact 12 and the second electrical contact 22.

[0050] By setting multiple first magnetic units 141 around the first electrical contact 12 and multiple second magnetic units 241 around the second electrical contact 22, the distance between the magnetic units and the electrical contact can be made closer, so that the contact between the first electrical contact 12 and the second electrical contact 22 is good.

[0051] In this configuration, the magnetic poles of each first magnetic unit 141 and the corresponding second magnetic unit 241 are opposite, allowing them to attract each other.

[0052] In some embodiments, the anti-mistake groove 13 is located on the outer periphery of the first electrical contact 12, and the first magnetic member 14 is disposed around the anti-mistake groove 13. The anti-mistake protrusion 23 is located on the outer periphery of the second electrical contact 22, and the second magnetic member 24 is disposed around the anti-mistake protrusion 23.

[0053] Please refer to some embodiments of this utility model. Figure 3 and Figure 4 The first housing 11 has a first contact surface 111 for contacting the second housing 21, and the second housing 21 has a second contact surface 211 for contacting the first housing 11. On the side near the first contact surface 111, at least two of the first magnetic units 141 have different magnetic poles; on the side near the second contact surface 211, at least two of the second magnetic units 241 have different magnetic poles. When the first connector 10 and the second connector 20 are connected, the first housing 11 and the second housing 21 are in contact with each other, and their contact surfaces are the first contact surface 111 and the second contact surface 211, respectively. For ease of description, the magnetic pole of the first magnetic unit 141 near the first contact surface 111 is referred to as the magnetic pole of the first magnetic unit 141, and the magnetic pole of the second magnetic unit 241 near the second contact surface 211 is referred to as the magnetic pole of the second magnetic unit 241.

[0054] When at least two first magnetic units 141 have different magnetic poles and two second magnetic units 241 have different magnetic poles, when the first connector 10 and the second connector 20 are inserted in reverse, at least one first magnetic unit 141 and one second magnetic unit 241 will generate magnetic repulsion when their poles are facing each other, reminding the user that the connectors are inserted in reverse.

[0055] Please refer to some embodiments of this utility model. Figure 4 There are two first magnetic attraction units 141, located near the first contact surface 111, with opposite magnetic poles. Similarly, there are two second magnetic attraction units 241, located near the second contact surface 211, with opposite magnetic poles. Both the first and second magnetic attraction units 141 are present in pairs, with one unit having an S pole and the other an N pole. Correspondingly, one second magnetic attraction unit 241 has an N pole, while the other has an S pole.

[0056] When the first connector 10 and the second connector 20 are inserted in reverse, the two first magnetic attraction units 141 and the corresponding two second magnetic attraction units 241 will be aligned with the same pole and generate magnetic repulsion force, reminding the user that the connectors are inserted in reverse. This can help the user identify whether the first connector 10 and the second connector 20 are connected correctly in the predetermined direction.

[0057] In other embodiments, the number of first magnetic units 141 may also be three, four, etc.

[0058] Please refer to some embodiments of this utility model. Figure 3 and Figure 4 Two first magnetic attraction units 141 are respectively disposed on opposite sides of the first electrical contact 12, and two second magnetic attraction units 241 are respectively disposed on opposite sides of the second electrical contact 22. The magnetic poles of the first magnetic attraction unit 141 on the first side of the first electrical contact 12 are different from those of the first magnetic attraction unit 141 on the second side of the first electrical contact 12, being S pole and N pole respectively. Similarly, the magnetic poles of the second magnetic attraction unit 241 on the first side of the second electrical contact 22 are different from those of the second magnetic attraction unit 241 on the second side of the second electrical contact 22, being N pole and S pole respectively.

[0059] By placing two first magnetic attraction units 141 with different magnetic poles on opposite sides of the first electrical contact 12, when the first connector 10 and the second connector 20 are inserted in reverse, the two first magnetic attraction units 141 and the two second magnetic attraction units 241 generate magnetic repulsion forces respectively, which can better remind the user.

[0060] In other embodiments, the magnetic poles of each first magnetic unit 141 are the same, and the magnetic poles of each second magnetic unit 241 are the same.

[0061] In some embodiments of this invention, the height difference between the top of the anti-foolproof protrusion 23 and the top of the second electrical contact 22 is greater than 2 mm. Sufficient height difference exists between the top of the anti-foolproof protrusion 23 and the top of the second electrical contact 22 to prevent the iron part attracted by the second magnetic chuck from swaying and contacting the second electrical contact 22.

[0062] Optionally, the height difference between the top of the anti-foolproof protrusion 23 and the top of the second electrical contact 22 is 2.1mm, 2.3mm, 3mm, etc.

[0063] Please see Figure 1 and Figure 2 This utility model also provides an educational robot, which includes the magnetic charging structure in any of the above embodiments.

[0064] The educational robot provided by this utility model adopts the aforementioned magnetic charging structure, which includes a first connector 10 and a second connector 20. When the first connector 10 and the second connector 20 are connected to each other, the anti-misalignment protrusion 23 extends into the anti-misalignment groove 13, the first magnetic suction member 14 and the second magnetic suction member 24 magnetically attract each other, and the first electrical contact 12 and the second electrical contact 22 contact each other, realizing the conductive connection between the first connector 10 and the second connector 20. The mutual cooperation of the anti-misalignment structure restricts the connection direction of the first connector 10 and the second connector 20, preventing the connectors from being inserted backwards. Moreover, the height of the anti-misalignment protrusion 23 is greater than the protrusion height of the second electrical contact 22. When the second magnetic suction member 24 attracts a ferrous part, it can stop the ferrous part, preventing the ferrous part from conducting the second electrical contact 22.

[0065] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A magnetic charging structure, characterized in that, Includes a first connector and a second connector for interconnection. The first connector includes a first housing, a first electrical contact exposed in the first housing, and a first magnetic attraction element disposed in the first housing. The first housing has a foolproof groove. The second connector includes a second housing, a second electrical contact protruding from the second housing, and a second magnetic member disposed on the second housing. The second electrical contact is used to make contact and conduct with the first electrical contact, and the second magnetic member is used to magnetically attract with the first magnetic member. The second housing protrusion is provided with a foolproof protrusion for cooperating with the foolproof groove, and the height of the foolproof protrusion is greater than the protrusion height of the second electrical contact.

2. The magnetic charging structure as described in claim 1, characterized in that, The anti-mistake groove is an arc-shaped groove with a notch, and the anti-mistake protrusion is an arc-shaped protrusion with a notch.

3. The magnetic charging structure as described in claim 2, characterized in that, The anti-mistake groove is an elongated oval groove with a notch, and the anti-mistake protrusion is an elongated oval protrusion with a notch.

4. The magnetic charging structure as described in claim 1, characterized in that, The anti-mistake groove is arranged around the first electrical contact, and the anti-mistake protrusion is arranged around the second electrical contact.

5. The magnetic charging structure as described in claim 1, characterized in that, The first magnetic attractor includes a plurality of first magnetic attracting units and is arranged around the first electrical contact; the second magnetic attractor includes a plurality of second magnetic attracting units and is arranged around the second electrical contact; the first magnetic attracting units and the second magnetic attracting units are magnetically attracted to each other in a one-to-one manner.

6. The magnetic charging structure as described in claim 5, characterized in that, The first housing has a first contact surface for contacting the second housing, and the second housing has a second contact surface for contacting the first housing; on the side near the first contact surface, at least two of the first magnetic units have different magnetic poles; on the side near the second contact surface, at least two of the second magnetic units have different magnetic poles.

7. The magnetic charging structure as described in claim 6, characterized in that, The first magnetic attraction unit has two components, and the magnetic poles of the two first magnetic attraction units are opposite on the side closer to the first contact surface; the second magnetic attraction unit has two components, and the magnetic poles of the two second magnetic attraction units are opposite on the side closer to the second contact surface.

8. The magnetic charging structure as described in claim 7, characterized in that, Two first magnetic attraction units are respectively disposed on opposite sides of the first electrical contact, and two second magnetic attraction units are respectively disposed on opposite sides of the second electrical contact.

9. The magnetic charging structure according to any one of claims 1-8, characterized in that, The height difference between the top of the anti-foolproof protrusion and the top of the second electrical contact is greater than 2mm.

10. An educational robot, characterized in that: Includes the magnetic charging structure according to any one of claims 1-9.

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