A charging device

Abstract

This application discloses a charging device, which includes a charging base and a charging plate. The charging base includes a charging tongue, a fixed seat, a torsion elastic element, and a fixing pin. The charging tongue has positive and negative electrodes and a fixing hole. The fixing pin extends perpendicularly to the plane of the charging plate and passes through the fixing hole and the torsion elastic element, connecting with the fixed seat to form a rotatable connection. The torsion elastic element abuts between the charging tongue and the fixed seat. The charging tongue is fitted onto the fixing pin through the fixing hole, forming a structure that can rotate around an axis. The torsion elastic element abuts between the charging tongue and the fixed seat. When the lawnmower contacts the charging tongue at an angle, the contact force drives the charging tongue to rotate around the axis of the fixing pin, preventing a rigid collision between the lawnmower and the charging tongue, which could damage the lawnmower or the charging tongue. Simultaneously, the rotation of the charging tongue allows the lawnmower to smoothly connect to the charging device at different angles.

Description

Technical Field

[0001] This application relates to the field of charging tool technology, and in particular to a charging device. Background Technology

[0002] With the widespread application of service robots (such as robotic vacuum cleaners and robotic lawnmowers), autonomous charging technology has become crucial for ensuring their continuous operation. Existing charging devices typically employ a fixed electrode design, requiring strict coaxial alignment between the charging dock interface and the robot plug to achieve a reliable connection.

[0003] In real-world applications, robots often struggle to precisely align with the center of the charging dock due to factors such as positioning errors, uneven ground, tire slippage, or path planning deviations. When a robot approaches the charging dock at an angle, the rigid charging tongue may collide with the robot's plug, potentially causing poor contact and charging interruption, or even damaging the electrodes or the robot's charging port due to mechanical impact. Utility Model Content

[0004] In view of the shortcomings of the existing technology, this application provides a charging device that allows the robot to be inserted from multiple angles, thereby improving the reliability and convenience of automatic charging of the robot.

[0005] To achieve the above objectives, this application adopts the following technical solution:

[0006] A charging device includes a charging base and a charging plate. The charging base is disposed on the charging plate. The charging base includes a charging tongue, a fixing seat, a torsion elastic element, and a fixing pin. The charging tongue includes an insulating shell and two electrode plates, which are a positive electrode plate and a negative electrode plate, respectively. The insulating shell has a fixing hole. The torsion elastic element abuts between the charging tongue and the fixing seat. The fixing pin extends perpendicularly to the plane of the charging plate and passes through the fixing hole and the torsion elastic element, and is connected to the fixing seat, so that the insulating shell and the fixing seat are rotatably connected.

[0007] In one embodiment, within the plane formed by the positive electrode and the negative electrode, the charging tongue can selectively rotate in a first direction or a second direction from its initial position; the angle of rotation of the charging tongue in the first direction is α, where α is not less than 20 degrees; the angle of rotation of the charging tongue in the second direction is β, where β is not less than 20 degrees.

[0008] In one embodiment, the charging tongue includes a tongue, an end, and an abutment. The end has the fixing hole, and the tongue extends at least partially out of the fixing seat. The abutment is connected to the end and is used to abut against the fixing seat when the charging tongue rotates to a preset position to restrict the rotation of the charging tongue.

[0009] In one embodiment, the positive electrode and the negative electrode are symmetrically arranged on both sides of the charging tongue.

[0010] In one embodiment, the fixing seat includes a main body, a first bent portion, and a second bent portion. The first bent portion is connected to both ends of the main body along its longitudinal direction, and the fixing pin is connected to the first bent portion. The second bent portion is connected to both ends of the main body along its transverse direction, and the torsional elastic member abuts against the second bent portion.

[0011] In one embodiment, the torsional elastic element includes a spiral portion, a first elastic leg, a second elastic leg, and a third elastic leg. The first elastic leg, the second elastic leg, and the third elastic leg are arranged around the spiral portion. The first elastic leg and the second elastic leg abut against the fixed base, and the third elastic leg is connected to the charging tongue.

[0012] In one embodiment, the charging tongue has a socket, and the third elastic leg is inserted into the socket.

[0013] In one embodiment, the torsional elastic element is a one-piece molded structure.

[0014] In one embodiment, the charging base has a cavity, and a support frame is also provided inside the cavity. The fixed base is connected to the charging base, and the support frame is used to support the sunshade.

[0015] In one embodiment, the charging device is a lawnmower charging device.

[0016] The beneficial effects of this application are as follows: This application provides a charging device, which includes a charging base and a charging plate. The charging base includes a charging tongue, a fixed seat, a torsion elastic element, and a fixing pin. The charging tongue has a fixing hole, and the fixing pin extends perpendicularly to the plane of the charging plate. The fixing pin passes through the fixing hole and the torsion elastic element and connects to the fixed seat, forming a rotatable connection between the charging tongue and the fixed seat. The torsion elastic element abuts between the charging tongue and the fixed seat. Compared with the prior art, the charging tongue is fitted onto the fixing pin through the fixing hole, forming a structure that can rotate around an axis. The torsion elastic element abuts between the charging tongue and the fixed seat. When the lawnmower contacts the charging tongue at an inclined angle, the contact force drives the charging tongue to rotate around the axis of the fixing pin, avoiding rigid collision between the lawnmower and the charging tongue, which could damage the lawnmower or the charging tongue. At the same time, the rotation of the charging tongue allows the lawnmower to smoothly connect to the charging device at different angles, ensuring a stable and efficient charging process and extending the service life of the equipment. Attached Figure Description

[0017] Figure 1 A schematic diagram of the structure of a charging device according to an embodiment of this application is shown;

[0018] Figure 2 A cross-sectional schematic diagram of a charging device according to an embodiment of this application is shown;

[0019] Figure 3 for Figure 2 Enlarged view of point A in the image;

[0020] Figure 4 This illustration shows a schematic diagram of the first direction rotation of a charging device according to an embodiment of this application;

[0021] Figure 5 This paper shows a schematic diagram of the second direction rotation of a charging device according to an embodiment of the present application;

[0022] Figure 6 A schematic diagram of the structure of a charging tongue according to an embodiment of this application is shown;

[0023] Figure 7 Another cross-sectional schematic diagram of a charging device according to an embodiment of this application is shown;

[0024] Figure 8 for Figure 7 Enlarged view of point B in the image;

[0025] Figure 9 A schematic diagram of the structure of a fixing base according to an embodiment of this application is shown;

[0026] Figure 10 A schematic diagram of the structure of a torsion elastic member according to an embodiment of this application is shown;

[0027] Figure 11A top view schematic diagram of a charging device according to an embodiment of this application is shown;

[0028] Figure 12 An exploded view of the components of a charging device according to an embodiment of this application is shown;

[0029] Reference numerals: 1. Charging stand; 11. Cover; 12. Protrusion hole;

[0030] 2. Charging tongue; 21. Tongue; 22. End; 23. Abutting part; 24. Arc-shaped part; 25. Insertion hole; 26. Fixing hole;

[0031] 3. Torsional elastic element; 31. First elastic support leg; 32. Second elastic support leg; 33. Third elastic support leg; 34. Spiral part;

[0032] 4. Fixing pin;

[0033] 5. Fixing base; 51. Main body; 52. First bend; 53. Second bend; 54. Mounting hole; 55. Through hole;

[0034] 6. Electrode plates; 7. Support frame; 8. Charging base plate. Detailed Implementation

[0035] In this application, the terms "set up," "equipped with," and "connected" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; 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, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0036] The terms “center,” “longitudinal,” “lateral,” “length,” “width,” “thickness,” “upper,” “lower,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” “outer,” “radial,” and “circumferential” indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0037] 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 at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0038] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0039] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0040] See Figure 1 This application provides a charging device that can be used as a lawnmower charging device. Specifically, the charging device is a device for charging lawnmowers. The lawnmower and the charging device can be electrically connected so that when the lawnmower needs charging, it can automatically walk to the charging device for efficient charging. It should be noted that, in addition to being applicable to lawnmowers, the charging device of this application can also be extended to other electric equipment, such as sweepers, intelligent snow sweepers, and other machinery.

[0041] See Figure 2 and Figure 3 The charging device includes a charging base 1 and a charging plate 8. The charging base 1 includes a charging tongue 2, a fixing seat 5, a torsion elastic element 3, and a fixing pin 4. The charging tongue 2 has a fixing hole 26. The fixing pin 4 extends perpendicularly to the plane of the charging plate 8. The fixing pin 4 passes through the fixing hole 26 and the torsion elastic element 3 and connects to the fixing seat 5, forming a rotatable connection between the charging tongue 2 and the fixing seat 5. The torsion elastic element 3 abuts against the charging tongue 2 and the fixing seat 5. The charging base 1 is mounted on the charging plate 8. The charging base 1 and the charging plate 8 can be fixedly mounted or detachably mounted. The charging plate 8 can be used for self-propelled robots, such as lawnmowers, to dock.

[0042] In practical applications, the charging tongue 2 refers to the conductive component that contacts the lawnmower. The charging tongue 2 includes an insulating shell and two electrode plates 6 mounted on the insulating shell. The two electrode plates 6 are a positive electrode plate and a negative electrode plate, respectively. The fixing base 5 serves as the supporting body and is rotatably connected to the charging tongue 2 through a fixing pin 4. The torsional elastic element 3 forms a bidirectional elastic constraint between the charging tongue 2 and the fixing base 5, which allows the charging tongue 2 to rotate when it comes into contact with the lawnmower to absorb misalignment, and also allows the charging tongue 2 to automatically reset through elastic restoring force after the collision is eliminated.

[0043] Specifically, the insulating shell has a fixing hole 26, and the insulating shell is fitted onto the fixing pin 4 through the fixing hole 26, forming a structure that can rotate around the axis of the fixing hole 26. The torsional elastic element 3 abuts between the charging tongue 2 and the fixing seat 5, so that the charging tongue 2 maintains its initial position when not subjected to external force. When the lawnmower contacts the charging tongue 2 at an inclined angle, the contact force drives the charging tongue 2 to rotate around the axis of the fixing pin 4, avoiding rigid collision between the lawnmower and the charging tongue 2, which could cause damage to the lawnmower or the charging tongue 2; at the same time, the rotation of the charging tongue 2 allows the lawnmower to smoothly connect to the charging device at different angles, ensuring a stable and efficient charging process, extending the service life of the equipment, and after the external force is removed, the restoring force of the torsional elastic element 3 drives the charging tongue 2 back to its initial position, maintaining the structural stability and charging efficiency of the charging device. This rotating structure allows the charging tongue 2 to adaptively adjust the contact angle and compensate for the lateral position deviation of the lawnmower.

[0044] In one embodiment, the insulating shell of the charging tongue 2 can be a one-piece molded structure. The positive electrode plate and the negative electrode plate are respectively connected to both sides of the insulating shell. The positive electrode plate and the negative electrode plate are made of conductive material. The fixing base 5 can be an injection-molded shell used to fix the installation and positioning of the pin 4. The torsional elastic element 3 refers to an elastic element that provides rotational restoring force, specifically a helical spring or a torsion spring.

[0045] The insulating shell is typically a structure made of insulating materials (such as plastics, ceramics, rubber, glass, and certain composite materials), and its function is to separate the positive and negative electrode plates on both sides to prevent short circuits. A one-piece injection-molded structure refers to molding the insulating shell as a single unit through an injection molding process. This structure eliminates the assembly gaps between separate components, allowing the insulating shell to evenly distribute the load under stress and avoiding stress concentration.

[0046] Meanwhile, the elastic modulus of the injection-molded material allows the insulating shell to undergo controlled deformation upon collision with the lawnmower, absorbing some of the impact energy and reducing rigid contact damage between the insulating shell and the lawnmower. The production process eliminates the need for multi-part assembly, reducing dimensional deviations caused by accumulated tolerances and ensuring precise fit between the insulating shell and the lawnmower. One-piece injection molding also simplifies the production process, reduces production costs, and improves production efficiency.

[0047] See again Figure 4 and Figure 5 Within the plane formed by the positive and negative electrode plates, the charging tongue 2 can selectively rotate along a first direction or a second direction from its initial position; the angle of rotation of the charging tongue 2 along the first direction is α, and α is not less than 20 degrees; the angle of rotation of the charging tongue 2 along the second direction is β, and β is not less than 20 degrees.

[0048] In practical applications, the initial position refers to the natural state of the charging tongue 2 when it is not subjected to external force. The first and second direction rotations refer to the bidirectional rotation path formed by the charging tongue 2 within the plane created by the positive and negative electrodes, allowing the charging tongue 2 to choose different directions of rotation when shifting laterally. Specifically, when the lawnmower and the charging tongue 2 are misaligned, the charging tongue 2 selects the corresponding rotation direction based on the lateral force applied by the lawnmower. For example, when the lawnmower shifts to the left, the charging tongue 2 rotates along the first direction; when the plug shifts to the right, it rotates along the second direction. The free deflection of the charging tongue 2 within the bidirectional rotation range enhances docking flexibility, ensuring that the charging tongue 2 and the lawnmower always maintain effective contact. Through the bidirectional rotation design in the first and second directions, the charging tongue 2 can adapt to both forward and reverse offset conditions, forming a multi-angle adaptive mechanism.

[0049] More specifically, angles α and β are not less than 20 degrees. Angle α refers to the allowable deflection range of the charging tongue 2 in the first direction, and angle β refers to the allowable deflection range of the charging tongue 2 in the second direction. Limiting angles α and β to not less than 20 degrees ensures that the charging tongue 2 has a sufficiently large range of rotation to cover a large range of positioning deviations.

[0050] It should be noted that the first direction and the second direction are usually two opposite directions of rotation, and the specific values ​​of angles α and β can be adjusted according to the actual application requirements. This application does not limit them.

[0051] See Figure 6 , Figure 7 and Figure 8 The insulating shell includes a tongue 21, an end 22, and an abutment 23. The end 22 has a fixing hole 26. The tongue 21 extends at least partially out of the fixing seat 5. The abutment 23 is connected to the end 22. The abutment 23 is used to abut against the fixing seat 5 when the charging tongue 2 rotates to a preset position to restrict the rotation of the charging tongue 2.

[0052] In practical applications, the end portion 22 is rotatably connected to the fixed base 5 via the fixed pin 4, and the tongue portion 21 extends out of the fixed base 5 to facilitate contact with the lawnmower. The tongue portion 21 refers to the charging part of the charging tongue 2 that contacts the lawnmower. The abutment portion 23 is a protruding structure in the charging tongue 2 used for mechanical limiting. When the charging tongue 2 rotates to a preset angle, the abutment portion 23 abuts against the fixed base 5 to form a physical limit. Specifically, when the charging tongue 2 is rotated by an external force, the end portion 22 rotates around the axis of the fixed pin 4, and the tongue portion 21 deflects accordingly to accommodate the positional shift of the lawnmower. During rotation, the gap between the abutment portion 23 and the fixed base 5 gradually decreases. When the charging tongue 2 rotates to a preset critical angle, the abutment portion 23 makes rigid contact with the fixed base 5, forcibly terminating the rotation through mechanical interference. This rotation limiting mechanism allows the charging tongue 2 to maintain controllable deflection within the effective contact range, allowing necessary angle adjustments to compensate for positioning errors while preventing damage to the torsional elastic element 3 due to excessive rotation exceeding its elastic limit.

[0053] By setting an abutment part 23 on the charging tongue 2, a precise mechanical stop point is formed, which effectively controls the rotation amplitude within a safe threshold, while not affecting the adaptive adjustment function of the charging tongue 2.

[0054] See again Figure 6 The charging tongue 2 also includes an arc portion 24, the first end of which is connected to the abutment portion 23, and the second end of which bends and extends toward the tongue portion 21 and is connected to the end portion 22.

[0055] In practical applications, the arc portion 24 can be an arc-shaped stop block integrally formed with the end portion 22. During the rotation of the charging tongue 2 under external force, the arc portion 24 can always maintain contact with the fixed seat 5. On the one hand, it forms a stable support point to maintain the stability of the rotation of the charging tongue 2. On the other hand, the arc portion 24 plays a transition role, smoothly transitioning the contact stress between the abutting part 23 of the charging tongue 2 and the fixed seat 5, and avoiding the local stress concentration caused by the direct collision between the abutting part 23 and the fixed seat 5.

[0056] See Figure 9 The fixing seat 5 includes a main body 51, a first bending part 52 and a second bending part 53. The main body 51 is connected to the first bending part 52 at both ends along its longitudinal direction, and the fixing pin 4 is connected to the first bending part 52. The main body 51 is connected to the second bending part 53 at both ends along its transverse direction, and the torsion elastic member 3 abuts against the second bending part 53.

[0057] In practical applications, the main body 51 refers to the core support structure of the fixing base 5, which is used to support the connection between the first bent part 52 and the second bent part 53. Specifically, the first bent part 52 refers to a bent structure extending vertically from both ends of the main body 51 in the longitudinal direction. It can be a folded edge structure integrally formed with the main body 51, and the first bent part 52 is used to install the fixing pin 4. The second bent part 53 refers to a bent structure extending vertically from both ends of the main body 51 in the transverse direction. It can also be a folded edge structure integrally formed with the main body 51, and the second bent part 53 is used to form a contact surface with the torsional elastic member 3. The second bent part 53 provides symmetrically distributed elastic fulcrums, so that the restoring force of the torsional elastic member 3 is evenly transmitted to the charging tongue 2.

[0058] The first bends 52 at both ends of the longitudinal direction form mounting positions for the fixing pins 4. The fixing pins 4 pass through the fixing holes 26 of the charging tongue 2 and connect with the first bends 52 on both sides, forming a stable rotation shaft support structure. The second bends 53 at both ends of the transverse direction form symmetrical contact with the elastic legs of the torsion elastic member 3. When the charging tongue 2 is deflected by an external force, the torsion elastic member 3 generates a uniform torque through the second bends 53 on both sides, causing the charging tongue 2 to return to its original position.

[0059] See Figure 10 The torsion elastic element 3 includes a spiral portion 34, a first elastic leg 31, a second elastic leg 32, and a third elastic leg 33. The first elastic leg 31, the second elastic leg 32, and the third elastic leg 33 are arranged around the spiral portion 34. The first elastic leg 31 and the second elastic leg 32 abut against the fixed base 5, and the third elastic leg 33 is connected to the charging tongue 2. The torsion elastic element 3 is a one-piece molded structure, that is, the spiral portion 34, the first elastic leg 31, the second elastic leg 32, and the third elastic leg 33 are composed of a single torsion spring.

[0060] In practical applications, the spiral portion 34 refers to a metal spring component with a continuously wound structure. The fixing pin 4 passes through the spiral portion 34 and connects to the fixing seat 5 to fix the torsional elastic element 3. The first elastic leg 31 is an elastic structure extending radially from the spiral portion 34, used to elastically abut against the second bent portion 53 on one side of the fixing seat 5. The second elastic leg 32 is another elastic structure symmetrically arranged with the first elastic leg 31, used to elastically abut against the second bent portion 53 on the other side of the fixing seat 5. The third elastic leg 33 is an elastic structure extending radially from the spiral portion 34 and located between the first elastic leg 31 and the second elastic leg 32. The third elastic leg 33 is used to connect to the charging tongue 2.

[0061] When the charging tongue 2 is subjected to a lateral external force, it drives the third elastic support leg 33 to rotate. The third elastic support leg 33 transmits the torsional torque to the spiral part 34, causing the spiral part 34 to undergo elastic deformation. The first elastic support leg 31 and the second elastic support leg 32 generate compressive reaction forces on both sides of the fixed base 5, forming a bidirectional constraint and limiting the rotation amplitude of the charging tongue 2. During rotation, the synergistic effect of the three support legs ensures that the elastic force is evenly distributed in the circumferential direction of the spiral part 34, avoiding plastic deformation caused by local stress concentration. When the external force disappears, the elastic potential energy stored in the spiral part 34 drives the charging tongue 2 to reset through the third elastic support leg 33, while the compressive reaction forces of the first and second elastic support legs 32 assist in restoring the initial position.

[0062] Compared to traditional charging devices that often employ a single-point supported spring structure, which is prone to asymmetrical deformation and elastic failure under lateral force, this application utilizes a three-legged ring structure to form a three-point mechanical support. This ensures rotational freedom while achieving symmetrical torque transmission and stable resetting action, guaranteeing that the charging tongue 2 accurately resets to its initial docking position after rotation, thus maintaining the reliability of the charging connection.

[0063] See again Figure 8 The tongue 21 of the charging tongue 2 has a socket 25, and the third elastic support leg 33 is inserted into the socket 25.

[0064] In one embodiment, the charging tongue 2 and the torsional elastic member 3 can be connected by an insertion method. Specifically, the charging tongue 2 has an insertion hole 25, and the third elastic leg 33 is inserted into the insertion hole 25, with the hole wall of the insertion hole 25 and the third elastic leg 33 forming an abutting fit. When the charging tongue 2 is rotated by an external force, the third elastic leg 33 is constrained within the insertion hole 25, preventing the third elastic leg 33 from sliding laterally along the surface of the charging tongue 2.

[0065] During the rotation of the charging tongue 2, the third elastic support leg 33 rotates together with the charging tongue 2 within the socket 25, preventing positional deviation of the charging tongue 2 caused by slippage of the third elastic support leg 33 and improving the alignment accuracy between the charging tongue 2 and the lawnmower. Simultaneously, the charging tongue 2 and the torsion elastic component 3 are connected by a plug-in joint, simplifying assembly. Furthermore, the charging tongue 2 and the torsion elastic component 3 are detachable, facilitating replacement of the torsion elastic component 3 and ensuring stability and durability during long-term use.

[0066] It should be noted that the connection between the charging tongue 2 and the torsion elastic element 3 is not limited to plugging; welding, bonding, and other fixing methods can also be used to ensure the structural stability.

[0067] See Figure 9In practical applications, the charging base 1 refers to the main structure of the charging device. The fixing base 5 is connected to the charging base 1. Specifically, the fixing base 5 has a mounting hole 54, and the charging base 1 has a corresponding bolt hole. The bolt passes through the mounting hole 54 and the bolt hole to install the fixing base 5 onto the charging base 1. The fixing base 5 has a through hole 55, through which the fixing pin 4 passes through the fixing hole 26 on the charging tongue 2 and the spiral part 34 of the torsion elastic element 3, and is inserted into the through hole 55 of the fixing base 5 to connect the torsion elastic element 3, the charging tongue 2, and the fixing base 5 together. The charging base 1 also has an extension hole 12 (see...). Figure 1 The end 22 of the charging tongue 2 is rotatably connected to the fixed base 5. The tongue 21 of the charging tongue 2 is connected to the positive electrode plate and the negative electrode plate for power supply. The tongue 21 extends out of the charging base 1 from the extension hole 12 so that the electrode plate 6 can make electrical contact with the lawnmower.

[0068] When the lawnmower moves to the charging base plate 8 for charging, if the charging angle of the lawnmower is not accurately aligned with the charging tongue 2, the lawnmower will tilt slightly relative to the charging tongue 2. The lawnmower will then come into contact with the tongue 21. The contact force will cause the tongue 21 to rotate around the fixed pin 4 to avoid a rigid collision between the lawnmower and the tongue 21. At the same time, the angle can be adjusted by rotation to facilitate docking with the tilted lawnmower. During the rotation of the tongue 21, due to the limiting effect of the abutment part 23, the tongue 21 cannot rotate further after rotating to a certain angle, thereby ensuring that the torsion of the torsion elastic element 3 will not exceed its own elastic limit.

[0069] Specifically, the positive and negative electrode plates can be symmetrically arranged on opposite sides of the charging tongue 2. The tongue 21 of the charging tongue 2 has the positive and negative electrode plates connected to opposite sides respectively. The electrode plate 6 refers to a conductive metal sheet structure. The electrode plate 6 is integrated onto the surface of the tongue 21 through a fixed connection. When the tongue 21 rotates under external force, the electrode plate 6 deflects synchronously with the tongue 21. When the lawnmower contacts the tongue 21 at an inclined angle, the rotation of the tongue 21 causes the electrode plate 6 to adapt to the angle adjustment between itself and the lawnmower, avoiding separation of the contact surface due to lateral misalignment.

[0070] See Figure 11 and Figure 12 The charging base 1 has an internal cavity (not shown in the figure), and a support frame 7 is installed inside the cavity. The support frame 7 is used to support the sunshade. The internal cavity of the charging base 1 is used to accommodate the support frame 7. The support frame 7 is mainly used to support the sunshade. The weight of the sunshade is directly transferred to the main body of the charging base 1 through the support frame 7, so as to avoid the lateral torque generated by the sunshade from external forces interfering with the charging tongue 2.

[0071] By setting up a support frame 7, this application provides an installation position for the sunshade when it is needed to be installed later. The sunshade can be directly inserted into the support frame 7, and the load of the sunshade is completely absorbed by the frame composed of the charging base 1 and the support frame 7, so as to avoid affecting the connection structure of the charging tongue 2.

[0072] Specifically, the charging base 1 includes a cover 11. When a sunshade is not required, the cover 11 covers the support frame 7, making the exterior of the charging base 1 closed, preventing debris from entering the interior of the charging base 1 and keeping the interior clean. At the same time, the cover 11 is detachable. When a sunshade is required, the cover 11 can be easily removed to expose the support frame 7, making it convenient to install the sunshade.

[0073] Specifically, the sunshade has a structure with two legs. Correspondingly, there are two support frames 2, symmetrically arranged on the left and right sides of the charging base 1, which can be used to fix the two legs of the sunshade. In addition, the cover 11 of the charging base 1 can also have insertion holes (not shown in the figure) for the two legs of the sunshade to be inserted. When the sunshade is not in use, the insertion holes can be sealed with a sealing cap.

[0074] The above description is only a specific embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A charging device, characterized by, include: A charging stand and a charging base plate, wherein the charging stand is disposed on the charging base plate; The charging dock includes: A charging tongue, comprising an insulating shell and two electrode plates, the two electrode plates being a positive electrode plate and a negative electrode plate respectively, and the insulating shell having a fixing hole; The mounting base is connected to the charging base; A torsion elastic element abuts between the charging tongue and the fixing seat; A fixing pin extends perpendicularly to the plane of the charging base plate, passes through the fixing hole and the torsion elastic element, and is connected to the fixing seat so that the insulating shell and the fixing seat are rotatably connected.

2. The charging device of claim 1, wherein, Within the plane formed by the positive electrode and the negative electrode, the charging tongue can selectively rotate in either a first direction or a second direction from its initial position; the angle at which the charging tongue rotates in the first direction is α, and α is not less than 20 degrees; the angle at which the charging tongue rotates in the second direction is β, and β is not less than 20 degrees.

3. The charging device of claim 1, wherein, The charging tongue includes a tongue portion, an end portion, and an abutment portion. The end portion has the fixing hole. The tongue portion extends at least partially out of the fixing seat. The abutment portion is connected to the end portion. The abutment portion is used to abut against the fixing seat when the charging tongue rotates to a preset position to restrict the rotation of the charging tongue.

4. The charging device of claim 1, wherein, The positive electrode and the negative electrode are symmetrically arranged on both sides of the charging tongue.

5. The charging device of claim 1, wherein, The fixing base includes a main body, a first bending portion and a second bending portion. The first bending portion is connected to both ends of the main body along its longitudinal direction, and the fixing pin is connected to the first bending portion. The second bending portion is connected to both ends of the main body along its transverse direction, and the torsional elastic element abuts against the second bending portion.

6. The charging device according to claim 3, characterized in that, The torsional elastic element includes a spiral portion, a first elastic leg, a second elastic leg, and a third elastic leg. The first elastic leg, the second elastic leg, and the third elastic leg are arranged around the spiral portion. The first elastic leg and the second elastic leg abut against the fixed seat, and the third elastic leg is connected to the charging tongue.

7. The charging device of claim 6, wherein, The charging tongue has a socket, and the third elastic leg is inserted into the socket.

8. The charging device of claim 1, wherein, The torsional elastic element is a one-piece molded structure.

9. The charging device according to any one of claims 1 to 8, characterized in that The charging base has a cavity, and a support frame is provided inside the cavity. The support frame is used to support the sunshade.

10. The charging device according to any one of claims 1 to 8, characterized in that The charging device is a lawnmower charging device.

Images