A retractable charging connection structure and charging dock

Abstract

This utility model discloses a telescopic charging connection structure and a charging base. The telescopic charging connection structure includes electrode contacts and a connecting frame. The connecting frame includes a connecting base and a telescopic bracket connected to the connecting base. The electrode contacts are sleeved within the telescopic bracket and can telescopically move between a first position and a second position relative to the telescopic bracket under the pressure of the electrode sheet. In the second position, the height of the electrode contacts relative to the connecting base is lower than that in the first position. An elastic element is provided between the electrode contacts and the connecting base. The elastic element provides a force to drive the electrode contacts to retract and return to the first position when they telescopically extend towards the second position. The electrode contacts of this telescopic charging connection structure have a buffer function, ensuring close contact with the corresponding electrode sheet on the robot during charging, avoiding poor contact, and facilitating stable and reliable autonomous charging of the robot. It is highly practical.

Description

Technical Field

[0001] This utility model relates to the field of robot charging technology, and in particular to a telescopic charging connection structure and a charging base. Background Technology

[0002] When a robot's battery life is insufficient, it needs to autonomously navigate to recharge. During charging, the positive and negative electrode plates on the robot's charging end make contact with the corresponding positive and negative electrode contacts on the charging base to conduct electricity. However, the current charging base uses a fixed structure design for the electrode contacts, resulting in a hard contact between the electrode plates and the electrode contacts. This is easily affected by factors such as deviations in the robot's docking position or vibrations, which can lead to poor contact between the electrode plates and the electrode contacts, causing charging interruptions and other problems. This is very detrimental to the robot's stable and reliable autonomous charging. Summary of the Invention

[0003] This invention addresses the shortcomings of existing technologies by providing a telescopic charging connection structure and a charging base. The electrode contacts of this telescopic charging connection structure have a buffer function, which can maintain close contact with the corresponding electrode plates on the robot at all times during the robot charging process, avoiding poor contact and facilitating stable and reliable autonomous charging of the robot. It is highly practical.

[0004] The technical solution adopted in this utility model is as follows: A telescopic charging connection structure includes electrode contacts and a connecting frame. The electrode contacts can contact and conduct electricity with corresponding electrode plates on an external robot charging input terminal. The connecting frame can be connected to an external charging body and includes a connecting base and a telescopic bracket connected to the connecting base. The electrode contacts are sleeved in the telescopic bracket and can telescopically move relative to the telescopic bracket between a first position and a second position under the pressure of the electrode plates. In the second position, the height of the electrode contacts relative to the connecting base is lower than that in the first position. An elastic element is provided between the electrode contacts and the connecting base. The elastic element can provide a force to drive the electrode contacts to retract and reset towards the first position when they telescopically extend towards the second position.

[0005] Preferably, the connecting base is provided with a wire passage, and a conductive wire is passed through the wire passage. One end of the conductive wire is electrically connected to the external charging body, and the other end is electrically connected to the electrode contact.

[0006] Preferably, the electrode contact includes a contact head and a limiting part one connected to the outer periphery of the contact head. The electrode contact can contact and conduct electricity with the electrode sheet through the contact head. The telescopic bracket includes a telescopic side plate arranged around the wire passage and a limiting part two protruding from the inner periphery of the telescopic side plate. The electrode contact is sleeved in the telescopic side plate. When the electrode contact moves telescopically, the limiting part one limits the movement between the limiting part two and the connecting base.

[0007] Preferably, the inner wall of the contact head has a wiring base, and one end of the conductive wire is detachably connected to the wiring base through a wiring component, the wiring component being made of conductive material.

[0008] Preferably, the side wall of the connecting base near the electrode contact is provided with a boss arranged around the wire passage, one end of the elastic element is sleeved outside the wiring base, and the other end is sleeved outside the boss.

[0009] Preferably, the contact head is recessed into a mounting groove on the side near the connecting base, the wiring base is disposed along the side wall of the mounting groove away from the connecting base, the connecting frame is made of insulating material, the elastic element is made of metal material, and an isolation sleeve is provided in the mounting groove. The isolation sleeve is made of insulating material and includes an isolation side portion that surrounds the elastic element and wraps around the inner peripheral side of the mounting groove, and an isolation end portion that surrounds the wiring base and wraps around the end face of the mounting groove away from the connecting base. One end of the elastic element abuts against the side of the isolation end near the connecting base, and the other end abuts against the side of the connecting base near the isolation end.

[0010] Preferably, the connecting base has a second boss protruding on the side wall away from the electrode contact, which is arranged around the wire passage. The second boss can be connected to the groove on the external charging body through a concave-convex fit.

[0011] Preferably, the telescopic bracket further includes a telescopic base plate protruding from the outer periphery of the bottom of the telescopic side plate. A connecting hole 1 is provided through the telescopic base plate, and a corresponding connecting hole 2 is provided on the connecting base. The telescopic bracket and the connecting base are detachably connected in the corresponding connecting holes 1 and 2 through a connector. Alternatively, the telescopic bracket, the connecting base, and the external charging body are detachably connected in the corresponding connecting holes 1 and 2 and at corresponding positions on the external charging body through a connector.

[0012] Preferably, the limiting part one is slidably connected to the inner wall of the telescopic side plate along the telescopic movement direction, the inner wall of the telescopic side plate has a limiting plane one arranged along the telescopic movement direction, the side wall of the limiting part one has a limiting plane two arranged corresponding to the limiting plane one, and the electrode contact and the connecting frame are circumferentially limited by the limiting plane two abutting against the limiting plane one.

[0013] This utility model also provides a charging base, including a charging body, a positive charging connection terminal, and a negative charging connection terminal. The positive charging connection terminal is disposed on the charging body and can contact and conduct electricity with the positive electrode plate of the charging input terminal on an external robot. The negative charging connection terminal is disposed on the charging body and can contact and conduct electricity with the negative electrode plate of the charging input terminal on an external robot. The positive charging connection terminal and / or the negative charging connection terminal are configured as the above-mentioned telescopic charging connection structure.

[0014] The beneficial effects achieved by this utility model are as follows: The telescopic charging connection structure provided by this utility model can connect its connecting frame to an external charging body. When the external robot docks with the charging base for charging, the electrode contacts can extend and descend from a first position to a second position relative to the connecting frame under the pressure of the corresponding electrode plate on the robot's charging input end. Since there is an elastic element between the electrode contacts and the connecting base, the electrode contacts are always supported by the elastic element during the extension and descent process, providing a reaction force to rise and reset towards the first position. This provides an elastic buffer for the docking process between the electrode plate and the electrode contacts, allowing the electrode contacts to adapt to the position of the electrode plate and maintain close contact with the electrode plate at all times, avoiding poor contact. This is beneficial for the robot's stable and reliable autonomous charging and has strong practicality.

[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a schematic diagram of a retractable charging connection structure according to an embodiment of the present invention.

[0017] Figure 2 This is a cross-sectional view of a telescopic charging connection structure according to an embodiment of the present invention.

[0018] Figure 3 This is a schematic diagram of the structure of an electrode contact according to an embodiment of the present invention.

[0019] Figure 4 This is a schematic diagram of the structure of a telescopic bracket according to an embodiment of the present invention.

[0020] Figure 5 This is a schematic diagram of the structure of the connecting base according to an embodiment of the present invention.

[0021] Figure 6 This is a schematic diagram of the wiring component according to an embodiment of the present invention.

[0022] Figure 7 This is a schematic diagram of the structure of a telescopic bracket according to another embodiment of the present invention.

[0023] Figure 8 This is a schematic diagram of the structure of a retractable charging base according to an embodiment of the present invention.

[0024] Reference numerals: Electrode contact 1, Contact head 11, Wiring base 111, Mounting groove 112, Limiting part one 12, Limiting plane two 121, Telescopic bracket 2, Telescopic side plate 21, Limiting plane one 211, Limiting part two 22, Telescopic base plate 23, Connecting hole one 24, Positioning groove 25, Connecting base 3, Wire passage 31, Boss one 32, Boss two 33, Connecting hole two 34, Boss three 35, Isolation sleeve 4, Isolation side 41, Isolation end 42, Wiring component 5, Terminal post 51, Limiting platform 52, Operating plane 521, Elastic element 6, Conductive wire 7, Charging body 100, Positive charging connection end 101, Negative charging connection end 102. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0026] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., 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] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0028] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0029] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains. The terms “first,” “second,” and similar terms used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “an” or “a” and similar terms do not indicate a limitation of quantity, but rather indicate the presence of at least one.

[0030] like Figures 1-6As shown in the figure, as an embodiment of this utility model, a telescopic charging connection structure is provided, including an electrode contact 1 and a connecting frame. The electrode contact 1 is made of conductive materials such as copper or gold, and can contact and conduct electricity with the corresponding electrode plate on the external robot charging input terminal. The connecting frame is made of insulating materials such as plastic to prevent the connecting frame from becoming electrified when the telescopic charging connection structure is working. The connecting frame can be connected to the external charging body and includes a connecting base 3 and a telescopic bracket 2 connected to the connecting base 3. The electrode contact 1 is sleeved in the telescopic bracket 2 and can move telescopically between a first position and a second position relative to the telescopic side plate 21 under the pressure of the electrode plate. In the second position, the height of the electrode contact 1 relative to the connecting base 3 is lower than the height of the electrode contact 1 relative to the connecting base 3 in the first position. An elastic element 6 is provided between the electrode contact 1 and the connecting base 3. The elastic element 6 can provide a force to drive the electrode contact 1 to retract and reset towards the first position when the electrode contact 1 extends towards the second position. The telescopic charging connection structure of this embodiment can connect its connecting frame to the external charging body. When the external robot docks with the charging base for charging, the electrode contact 1 can extend and descend from the first position to the second position relative to the connecting frame under the pressure of the corresponding electrode plate on the robot's charging input end. Since there is an elastic element 6 between the electrode contact 1 and the connecting base 3, the electrode contact 1 is always supported by the elastic element 6 during the extension and descent process, providing a reaction force to rise and reset towards the first position. This provides an elastic buffer for the docking process between the electrode plate and the electrode contact 1, so that the electrode contact 1 can adapt to the position of the electrode plate and maintain close contact with the electrode plate at all times, avoiding poor contact. This is conducive to the stable and reliable autonomous charging of the robot and has strong practicality.

[0031] like Figure 2 As shown, in some specific embodiments, a wire passage 31 is provided through the connecting base 3, and a conductive wire 7 is passed through the wire passage 31. One end of the conductive wire 7 is electrically connected to the external charging body, and the other end is electrically connected to the electrode contact 1. The conductive wire 7 can extend and retract relative to the wire passage 31 as the electrode contact 1 extends and retracts, so that the electrode contact 1 does not need to extend out of the connecting base 3 to maintain an electrical connection with the conductive wire 7 during the extension and retraction process. This reduces the overall height of the telescopic charging connection structure during the charging process and facilitates the spatial arrangement of the telescopic charging connection structure on the charging body.

[0032] In some specific embodiments, the electrode contact 1 includes a contact head 11 and a limiting part 12 connected to the outer periphery of the contact head 11. The electrode contact 1 can contact and conduct electricity with the corresponding electrode plate on the charging input terminal of the external robot through the contact head 11. The telescopic bracket 2 includes a telescopic side plate 21 arranged around the wire passage 31 and a limiting part 22 protruding from the inner periphery of the telescopic side plate 21. The electrode contact 1 is sleeved in the telescopic side plate 21. When the electrode contact 1 moves telescopically, the limiting part 12 is limited to move between the limiting part 22 and the connecting base 3. When the electrode contact 1 is in the first position, the limiting part 12 and the limiting part 22 abut against each other, thereby positioning the electrode contact 1 in the first position and preventing the electrode contact 1 from disengaging from the connecting bracket. The structure is simple and practical. When the electrode contact 1 is in the second position, the limiting part 12 and the limiting part 22 separate.

[0033] The inner wall of the contact head 11 has a wiring base 111. One end of the conductive wire 7 is detachably connected to the wiring base 111 via a connector 5, facilitating the assembly or replacement of the electrode contact 1. The connector 5 is made of conductive materials such as copper or gold for conducting electricity. The wiring base 111 is coaxially arranged with the wire passage 31, the connector 5 is coaxially arranged with the wire passage 31, and the conductive wire 7 is coaxially arranged with the wire passage 31. This facilitates the smooth axial extension and retraction of the conductive wire 7 relative to the wire passage 31 during the extension and retraction of the electrode contact 1, preventing the conductive wire 7 from curling or getting stuck between the connection base 3 and the electrode contact 1, thus extending the service life of the conductive wire 7. Of course, in other embodiments, the wiring base 111, connector 5, or wire passage 31 can also be staggered with the wire passage 31. The wiring base 111 can also be set on the limiting part 12, all of which can drive the conductive wire 7 to extend and retract relative to the wire passage 31 during the extension and retraction of the electrode contact 1.

[0034] In some specific embodiments, the wiring base 111 is recessed with a wiring groove, and the wiring component 5 extends into the wiring groove and is threadedly connected to the wiring groove, which facilitates the connection or disconnection of the electrode contact 1 and the wiring component 5. In other embodiments, the wiring component 5 and the wiring base 111 can also be connected by other detachable connection structures such as a locking connection.

[0035] In some specific embodiments, the elastic element 6 is configured as a spring. A boss 32 protrudes from the side wall of the connecting base 3 near the electrode contact 1, surrounding the wire passage 31. One end of the elastic element 6 is fitted over the wiring base 111, and the other end is fitted over the boss 32. The wiring base 111 and the boss 32 limit the radial movement of both ends of the elastic element 6, improving the stability of the installation and preventing displacement during compression. The boss 32 also extends the length of the wire passage 31, facilitating smooth extension and retraction of the conductive wire 7 relative to the wire passage 31. In other embodiments, the elastic element 6 can also be configured as elastic silicone or other structures that provide elasticity.

[0036] In some specific embodiments, the contact head 11 is recessed with a mounting groove 112 on the side near the connecting base 3. The wiring base 111 is arranged along the side wall of the mounting groove 112 away from the connecting base 3. After the wiring component 5 is connected to the wiring base 111, the distance between the end face of the wiring component 5 near the connecting base 3 and the connecting base 111 is greater than the distance between the end face of the contact head 11 near the connecting base 111 and the connecting base 3. This forms a storage area between the wiring component 5 and the side wall of the mounting groove 112 for the boss 32 to extend into the mounting groove 112 when the electrode contact 1 is in the second position. This makes the electrode contact 1 and the connecting frame structure compact, further reducing the space height occupied by the telescopic charging connection structure and facilitating the spatial arrangement of the telescopic charging connection structure on the charging body.

[0037] In some specific embodiments, the elastic element 6 is made of metal materials such as iron and steel. An isolation sleeve 4 is provided inside the mounting groove 112. The isolation sleeve 4 is made of insulating materials such as plastic and rubber, and includes an isolation side portion 41 that surrounds the elastic element 6 and wraps around the inner periphery of the mounting groove 112, and an isolation end portion 42 that surrounds the wiring base 111 and wraps around the end face of the mounting groove 112 away from the connecting base 3. One end of the elastic element 6 abuts against the side of the isolation end portion 42 near the connecting base 2, and the other end abuts against the side of the connecting base 2 near the isolation end portion 42. When the electrode contact 1 extends and retracts from the first position to the second position under the pressure of the electrode sheet, the electrode contact 1 compresses the elastic element 6, and the elastic element 6 provides a reaction force to push the electrode contact 1 back to the first position. In this embodiment, the isolation sleeve 4 separates the elastic element 6 from the electrode contact 1, preventing the elastic element 6 from becoming energized during operation of the telescopic charging connection structure. The connecting base 3 isolates the elastic element 6 from the outside, preventing electric shock and improving safety during use. In addition, after the wiring component 5 and the electrode contact 1 are installed and the wiring is completed, an insulating thermoplastic tube will be put on the part of the wiring component 5 and the electrode contact 1 that is not covered by the isolation sleeve 4, so that the elastic element 6 is completely electrically isolated from the electrode contact 1 and the wiring component 5, ensuring that only the electrode contact 1, the wiring component 5 and the conductive wire 7 are energized during operation.

[0038] like Figure 2 As shown, in some specific embodiments, a second boss 33 is provided on the side wall of the connecting base 3 away from the electrode contact 1, arranged around the wire passage 31. The second boss 33 can be connected with the groove on the external charging body through a concave-convex fit, thereby positioning it when installing the telescopic charging connection structure and facilitating precise positioning and connection with the external charging body. In addition, the setting of the second boss 33 further extends the length of the wire passage 31, which is more conducive to the smooth telescopic movement of the conductive wire 7 relative to the wire passage 31.

[0039] In some specific embodiments, the telescopic bracket 2 further includes a telescopic base plate 23 protruding from the outer periphery of the bottom of the telescopic side plate 21. A connecting hole 24 is provided through the telescopic base plate 23, and a corresponding connecting hole 34 is provided on the connecting base 3. The telescopic bracket 2 and the connecting base 3 are detachably connected by screws, bolts, or other connectors within the corresponding connecting holes 24 and 34, facilitating the assembly of the electrode contact 1, elastic element 6, and isolation sleeve 4 inside the connecting bracket. In other embodiments, the telescopic bracket 2, the connecting base 3, and the external charging body are detachably connected by screws, bolts, or other connectors within the corresponding connecting holes 24 and 34, and at corresponding positions on the external charging body, facilitating the installation of the telescopic charging connection structure on the external charging body. Figure 4 As shown, in this embodiment, the telescopic base plate 23 is set as a whole, making the structure more stable and robust; as Figure 7 As shown, in another embodiment of the present invention, the telescopic base plate 23 is configured with a plurality of protrusions respectively connected to the outer periphery of the base plate of the telescopic side plate 21.

[0040] like Figure 3 , Figure 4 As shown, in some specific embodiments, the limiting part 12 is slidably connected to the inner wall of the telescopic side plate 21 along the telescopic movement direction to ensure that the electrode contact 1 maintains axial movement during telescopic movement. The inner wall of the telescopic side plate 21 has a limiting plane 211 arranged along the telescopic movement direction, and the side wall of the limiting part 12 has a limiting plane 121 arranged corresponding to the limiting plane 211. The electrode contact 1 and the connecting frame are circumferentially limited by the limiting plane 121 abutting against the limiting plane 211, preventing the electrode contact 1 from rotating relative to the telescopic support 2 with the movement of the electrode sheet, ensuring the accurate movement trajectory of the electrode contact 1, and ensuring the stability of the robot during charging.

[0041] like Figure 6As shown, in some specific embodiments, the connector 5 includes a terminal 51 that mates with the wiring groove and a limiting platform 52 that protrudes from the outer periphery of the terminal 51. When the terminal 51 mates with the wiring groove, the limiting platform 52 is limited to the outside of the wiring base 111. The side of the limiting platform 52 has an operating plane 521 arranged along the extension and retraction direction of the electrode contact 1, which facilitates the operator to install or remove the connector 5 from the electrode contact 1.

[0042] like Figure 4 , Figure 5 As shown, in some specific embodiments, the connecting base 3 has one or more protruding bosses 35, and the telescopic base plate 23 has one or more positioning grooves 25 corresponding to the bosses 35. The connecting base 3 and the telescopic base plate 23 are positioned and connected by the bosses 35 extending into the corresponding positioning grooves 25 and engaging with them, facilitating quick positioning and connection between the connecting base 3 and the telescopic base plate 23. In other embodiments, the bosses 35 can also be placed on the telescopic base plate 23, and the positioning grooves can be placed on the connecting base 3, which also achieves mutual positioning between the connecting base 3 and the telescopic base plate 23.

[0043] like Figure 8 As shown, in another embodiment of this utility model, a charging base is also provided, including a charging body 100, a positive charging connection terminal 101, and a negative charging connection terminal 102. The positive charging connection terminal 101 is disposed on the charging body 100 and is used to contact and conduct electricity with the positive electrode plate of the charging input terminal on an external robot. The negative charging connection terminal 102 is disposed on the charging body 100 and is used to contact and conduct electricity with the negative electrode plate of the charging input terminal on an external robot. The positive charging connection terminal 101 and the negative charging connection terminal 102 are respectively configured as the telescopic charging connection structure provided by this utility model, thus having a buffer function, which can maintain close contact with the corresponding electrode plate on the robot at all times during the robot charging process, avoiding poor contact, which is conducive to the stable and reliable autonomous charging of the robot, and has strong practicality. Of course, in some other embodiments, only either the positive charging connection terminal 101 or the negative charging connection terminal 102 can be configured as the telescopic charging connection structure provided by this utility model.

[0044] In some specific embodiments, the positive charging connection 101 and the negative charging connection 102 are disposed on the outer side of the top wall of the charging body 100, which facilitates the assembly or disassembly of the positive charging connection 101 and the negative charging connection 102.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

[0046] In summary, the above description is only a preferred embodiment of the present utility model. All equivalent changes and modifications made within the scope of the patent application of the present utility model shall fall within the scope of the patent of the present utility model.

Claims

1. A retractable charging connection structure, characterized in that, include: The electrode contacts are able to make contact with and conduct electricity to the corresponding electrode plates on the external robot charging input terminal; The connecting frame can be connected to an external charging body, including a connecting base and a telescopic bracket connected to the connecting base; The electrode contact is sleeved inside the telescopic bracket and can move telescopically between a first position and a second position relative to the telescopic bracket under the pressure of the electrode plate. In the second position, the height of the electrode contact relative to the connecting base is lower than that in the first position. An elastic element is provided between the electrode contact and the connecting base. The elastic element can provide a force to drive the electrode contact to retract and reset towards the first position when the electrode contact extends or retracts towards the second position.

2. The telescopic charging connection structure according to claim 1, characterized in that: The connecting base is provided with a wire passage, and a conductive wire is passed through the wire passage. One end of the conductive wire is electrically connected to the external charging body, and the other end is electrically connected to the electrode contact.

3. The retractable charging connection structure according to claim 2, characterized in that: The electrode contact includes a contact head and a limiting part one connected to the outer periphery of the contact head. The electrode contact can contact and conduct electricity with the electrode sheet through the contact head. The telescopic bracket includes a telescopic side plate arranged around the wire passage and a limiting part two protruding from the inner periphery of the telescopic side plate. The electrode contact is sleeved in the telescopic side plate. When the electrode contact moves telescopically, the limiting part one limits the movement between the limiting part two and the connecting base.

4. The telescopic charging connection structure according to claim 3, characterized in that: The inner wall of the contact head has a wiring base, and one end of the conductive wire is detachably connected to the wiring base through a wiring component, which is made of conductive material.

5. The telescopic charging connection structure according to claim 4, characterized in that: The connecting base has a protrusion on one side wall near the electrode contact, which is arranged around the wire passage. One end of the elastic element is sleeved outside the wiring base, and the other end is sleeved outside the protrusion.

6. The telescopic charging connection structure according to claim 5, characterized in that: The contact head has a recessed mounting groove on the side near the connecting base. The wiring base is set along the side wall of the mounting groove away from the connecting base. The connecting frame is made of insulating material. The elastic element is made of metal material. An isolation sleeve is provided in the mounting groove. The isolation sleeve is made of insulating material and includes an isolation side portion that surrounds the elastic element and wraps around the inner peripheral side of the mounting groove, and an isolation end portion that surrounds the wiring base and wraps around the end face of the mounting groove away from the connecting base. One end of the elastic element abuts against the side of the isolation end near the connecting base, and the other end abuts against the side of the connecting base near the isolation end.

7. The retractable charging connection structure according to any one of claims 1-6, characterized in that: The connecting base has a second protrusion on the side wall away from the electrode contact, which is arranged around the wire passage. The second protrusion can be connected to the groove on the external charging body through a concave-convex fit.

8. The retractable charging connection structure according to any one of claims 2-6, characterized in that: The telescopic bracket also includes a telescopic base plate protruding from the outer periphery of the bottom of the telescopic side plate. A connecting hole 1 is provided through the telescopic base plate, and a corresponding connecting hole 2 is provided on the connecting base. The telescopic bracket and the connecting base are detachably connected in the corresponding connecting holes 1 and 2 through connectors. Alternatively, the telescopic bracket, the connecting base, and the external charging body are detachably connected in the corresponding connecting holes 1 and 2 and at corresponding positions on the external charging body through connectors.

9. The retractable charging connection structure according to any one of claims 3-6, characterized in that: The limiting part 1 is slidably connected to the inner wall of the telescopic side plate along the telescopic movement direction. The inner wall of the telescopic side plate has a limiting plane 1 arranged along the telescopic movement direction. The side wall of the limiting part 1 has a limiting plane 2 arranged corresponding to the limiting plane 1. The electrode contact and the connecting frame are circumferentially limited by the limiting plane 2 abutting against the limiting plane 1.

10. A charging stand, characterized in that, include: Charging unit; A positive charging connection terminal is provided on the charging body, which can contact and conduct electricity with the positive electrode plate of the charging input terminal on an external robot; The negative charging connection terminal is located on the charging body and can contact and conduct electricity with the negative electrode plate of the charging input terminal on the external robot. The positive charging connection terminal and / or the negative charging connection terminal are configured as a telescopic charging connection structure as described in any one of claims 1-9.

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