A charging base current terminal, a charging base and a charging connector

Abstract

The utility model relates to the technical field of electric connector, concretely relates to a charging seat current terminal, charging seat and charging connector. The charging seat current terminal includes the pair of inserting parts arranged at the tail part, and the pair of inserting parts are used for being inserted between the opposite two contact spring paws of the corresponding terminal of the adapter wire harness connector, the pair of inserting parts are the folded lamination structure, the lamination structure has at least two contact sheets for conducting electricity with the two contact spring paws respectively, at least one contact sheet has the end of the bending position, the end of the contact sheet stretches to the corresponding edge of the lamination structure, the two contact sheets are opposite in the thickness direction and the width size satisfies the contact requirement of the contact spring paw and the pair of inserting parts. The two contact spring paws are all in contact with the complete contact surface, and are not easy to be damaged due to the friction in the inserting process, which is conducive to reliable electric contact.

Description

Technical Field

[0001] This utility model relates to the field of electrical connector technology, specifically to a charging socket current terminal and a charging socket and charging connector. Background Technology

[0002] The primary way to replenish energy for new energy vehicles is through charging. As the interface for vehicle-side charging, the charging socket is required to have a long service life, be easy to assemble, and be safe and reliable. Chinese utility model patent CN220797148U discloses a modular charging socket, including a charging head cover, signal terminals, current terminals, a PCBA board, a charging tail cover, and a mating connector. The front ends of the signal and current terminals are engaged in terminal slots within the charging head cover for connection to an external charging gun terminal. The signal terminal is secured to a cylindrical hole on the PCBA board via a spring-loaded structure at its tail, electrically connecting to a temperature sensor on the PCBA board. The tail of the current terminal extends through the terminal slots in the PCBA board and tail cover, then inserts into a connector terminal in the mating connector. The current terminal is an integrated stamped current terminal with a flat tail section for detachable insertion and connection to the terminal in the mating connector.

[0003] The aforementioned charging socket is a charging connector. The mating connectors form a wire harness connector for connecting wire harnesses. The charging socket head cover, signal terminals, current terminals, PCBA board, and charging socket tail cover are assembled to form a charging socket. The charging socket head end is inserted into the charging gun, and the tail end is inserted into the wire harness connector. The current terminal head of the charging socket is used to be inserted into the current terminal of the charging gun, and the tail end is used to be inserted into the corresponding terminal of the wire harness connector.

[0004] The charging dock's current terminal has a flat tail structure, forming a insert that fits into the clamp-type structure of the wire harness connector's terminal head. The clamp-type structure includes two opposing contact claws. After the insert is inserted between the two contact claws, the two contact claws elastically abut against the two sides of the insert's thickness direction, forming a line contact. The charging dock's current terminal is formed by stamping and rolling sheet material. Therefore, its flat tail structure is formed by folding and flattening. Because it folds from the two edges in the width direction towards the center, the seam between the two folded parts is located in the middle of the flat plate. This position is precisely the main contact area of ​​the wire harness connector's contact claws, and during insertion, it slides and rubs along its length. Due to the elasticity of the metal itself, the edges of the seam formed by the two folded parts at the tail of the current terminal are prone to warping, which can easily scratch the contact claws of the wire harness connector, increasing wear and affecting the reliability of conductive contact. Moreover, if only edge contact occurs, the contact area will be reduced. In addition, for some terminals, the surface of the terminal plug is coated with a metal coating with stronger conductivity. If the friction is severe, the metal coating will be damaged, affecting the current carrying capacity. Utility Model Content

[0005] The purpose of this utility model is to provide a current terminal for a charging base, so as to solve the problem that the folded and formed structure of the tail insert of the current terminal of the current base of the current base is prone to damaging the contact spring claw of the adapter wire harness connector and affecting the reliability of conductive contact; the purpose of this utility model is also to provide a charging base and a charging connector to solve the above problems.

[0006] The technical solution for the charging base current terminal of this utility model is as follows: A charging dock current terminal includes an in-line insertion portion disposed at its tail. The in-line insertion portion is used to insert between two opposing contact springs of a corresponding terminal of an adapter wire harness connector. The in-line insertion portion is a folded lamination structure. The lamination structure has at least two contact pieces for conductive contact with the two contact springs respectively. At least one contact piece has an end facing away from the folded position. The end of the contact piece extends to the corresponding edge of the lamination structure. The two contact pieces have opposite sides in the thickness direction for the two contact springs to abut against each other, and the width dimension meets the contact requirements between the contact springs and the in-line insertion portion.

[0007] Beneficial effects: This utility model improves upon the existing charging socket current terminal by folding the tail end of the terminal, making the edges of the two contact pieces of the stacked structure close to or flush with each other. The ends of the contact pieces extend to the edge of the entire inner insertion part. The opposite sides of the two contact pieces form two contact surfaces of the inner insertion part, allowing the corresponding terminals of the wiring harness connector to abut against each other. This fully utilizes the width of the inner insertion part to form a sufficiently wide contact piece, thereby creating a sufficiently wide contact surface. When the tail end of the charging socket current terminal is inserted between the corresponding terminals of the adapter wiring harness connector, both contact claws make contact with the complete contact surface, making it less prone to damage due to friction during the insertion process, which is beneficial for reliable conductive contact.

[0008] Furthermore, the various sheet-like parts of the laminated structure are fixedly connected, two contact pieces constitute two sheet-like parts, and the fixedly connected parts of the various sheet-like parts constitute the reinforcing parts, with the reinforcing parts and bending positions spaced apart.

[0009] Furthermore, the part of the contact piece that contacts the contact spring claw after the charging socket current terminal and the corresponding terminal of the wire harness connector are plugged in is defined as the contact part, and the contact part is offset from the reinforcement part.

[0010] Furthermore, the various sheet-like parts are fixedly connected by press riveting, and the reinforced parts are the press riveting parts.

[0011] Furthermore, the riveted parts do not protrude from the opposite sides of the two contact pieces.

[0012] Furthermore, there are two or more riveting locations spaced apart along the extension direction of the inner insertion part, and the riveting locations are located on the side away from the bending position of the center line in the width direction of the contact piece.

[0013] Furthermore, the part of the contact piece that contacts the contact spring claw after insertion is located between two crimping parts in the extending direction of the inner insertion part.

[0014] Furthermore, the stacked structure is a double-layer structure, with two contact pieces folded together to form the stacked structure. One contact piece forms an integral contact piece that is integrally connected to the main body of the charging socket current terminal, and the other contact piece forms a folded contact piece that is bent relative to the integral contact piece. One side of the two contact pieces in the width direction is integrally bent and connected, and the other side edge is flush. The length direction of the contact pieces is consistent with the insertion direction of the charging socket current terminal, and one end of the integral contact piece in the length direction is integrally connected to the main body of the charging socket current terminal.

[0015] Furthermore, the stacked structure is folded and rolled to form a flat structure, and the two outermost sheet-like portions in the thickness direction form the two contact sheets.

[0016] Furthermore, the stacked structure includes three or more sheet-like parts, any three sheet-like parts are Z-shaped folded structures, each sheet-like part has the same width, and the two outermost sheet-like parts in the thickness direction of the stacked structure form the two contact sheets.

[0017] The technical solution of this utility model charging dock is as follows: A charging socket includes an insulator and a current terminal mounted within the insulator. The current terminal is a charging socket current terminal. The charging socket current terminal includes an inward insertion portion disposed at its tail. The inward insertion portion is used to insert between two opposing contact springs of a corresponding terminal of an adapter wire harness connector. The inward insertion portion is a folded lamination structure. The lamination structure has at least two contact pieces for conductive contact with the two contact springs respectively. At least one contact piece has an end facing away from the folded position. The end of the contact piece extends to the corresponding edge of the lamination structure. The opposite sides of the two contact pieces in the thickness direction are respectively abutted by the two contact springs, and the width dimension meets the contact requirements between the contact springs and the inward insertion portion.

[0018] Beneficial effects: This utility model improves upon the existing charging socket current terminal by folding the tail end of the terminal, making the edges of the two contact pieces of the stacked structure close to or flush with each other. The ends of the contact pieces extend to the edge of the entire inner insertion part. The opposite sides of the two contact pieces form two contact surfaces of the inner insertion part, allowing the corresponding terminals of the wiring harness connector to abut against each other. This fully utilizes the width of the inner insertion part to form a sufficiently wide contact piece, thereby creating a sufficiently wide contact surface. When the tail end of the charging socket current terminal is inserted between the corresponding terminals of the adapter wiring harness connector, both contact claws make contact with the complete contact surface, making it less prone to damage due to friction during the insertion process, which is beneficial for reliable conductive contact.

[0019] Furthermore, the various sheet-like parts of the laminated structure are fixedly connected, two contact pieces constitute two sheet-like parts, and the fixedly connected parts of the various sheet-like parts constitute the reinforcing parts, with the reinforcing parts and bending positions spaced apart.

[0020] Furthermore, the part of the contact piece that contacts the contact spring claw after the charging socket current terminal and the corresponding terminal of the wire harness connector are plugged in is defined as the contact part, and the contact part is offset from the reinforcement part.

[0021] Furthermore, the various sheet-like parts are fixedly connected by press riveting, and the reinforced parts are the press riveting parts.

[0022] Furthermore, the riveted parts do not protrude from the opposite sides of the two contact pieces.

[0023] Furthermore, there are two or more riveting locations spaced apart along the extension direction of the inner insertion part, and the riveting locations are located on the side away from the bending position of the center line in the width direction of the contact piece.

[0024] Furthermore, the part of the contact piece that contacts the contact spring claw after insertion is located between two crimping parts in the extending direction of the inner insertion part.

[0025] Furthermore, the stacked structure is a double-layer structure, with two contact pieces folded together to form the stacked structure. One contact piece forms an integral contact piece that is integrally connected to the main body of the charging socket current terminal, and the other contact piece forms a folded contact piece that is bent relative to the integral contact piece. One side of the two contact pieces in the width direction is integrally bent and connected, and the other side edge is flush. The length direction of the contact pieces is consistent with the insertion direction of the charging socket current terminal, and one end of the integral contact piece in the length direction is integrally connected to the main body of the charging socket current terminal.

[0026] Furthermore, the stacked structure is folded and rolled to form a flat structure, and the two outermost sheet-like portions in the thickness direction form the two contact sheets.

[0027] Furthermore, the stacked structure includes three or more sheet-like parts, any three sheet-like parts are Z-shaped folded structures, each sheet-like part has the same width, and the two outermost sheet-like parts in the thickness direction of the stacked structure form the two contact sheets.

[0028] The technical solution of the charging connector of this utility model is as follows: A charging connector includes a charging socket and a wire harness connector inserted into the tail of the charging socket. The charging socket includes an insulator and a current terminal mounted within the insulator. The current terminal is the charging socket current terminal. The charging socket current terminal includes an in-line insertion portion disposed at its tail. The in-line insertion portion is used to insert between two opposing contact springs of a corresponding terminal of the wire harness connector. The in-line insertion portion is a folded lamination structure. The lamination structure has at least two contact pieces for conductive contact with the two contact springs respectively. At least one contact piece has an end facing away from the folded position. The end of the contact piece extends to the corresponding edge of the lamination structure. The opposite sides of the two contact pieces in the thickness direction are respectively abutted by the two contact springs, and the width dimension meets the contact requirements between the contact springs and the in-line insertion portion.

[0029] Beneficial effects: This utility model improves upon the existing charging socket current terminal by folding the tail end of the terminal, making the edges of the two contact pieces of the stacked structure close to or flush with each other. The ends of the contact pieces extend to the edge of the entire inner insertion part. The opposite sides of the two contact pieces form two contact surfaces of the inner insertion part, allowing the corresponding terminals of the wiring harness connector to abut against each other. This fully utilizes the width of the inner insertion part to form a sufficiently wide contact piece, thereby creating a sufficiently wide contact surface. When the tail end of the charging socket current terminal is inserted between the corresponding terminals of the adapter wiring harness connector, both contact claws make contact with the complete contact surface, making it less prone to damage due to friction during the insertion process, which is beneficial for reliable conductive contact.

[0030] Furthermore, the various sheet-like parts of the laminated structure are fixedly connected, two contact pieces constitute two sheet-like parts, and the fixedly connected parts of the various sheet-like parts constitute the reinforcing parts, with the reinforcing parts and bending positions spaced apart.

[0031] Furthermore, the part of the contact piece that contacts the contact spring claw after the charging socket current terminal and the corresponding terminal of the wire harness connector are plugged in is defined as the contact part, and the contact part is offset from the reinforcement part.

[0032] Furthermore, the various sheet-like parts are fixedly connected by press riveting, and the reinforced parts are the press riveting parts.

[0033] Furthermore, the riveted parts do not protrude from the opposite sides of the two contact pieces.

[0034] Furthermore, there are two or more riveting locations spaced apart along the extension direction of the inner insertion part, and the riveting locations are located on the side away from the bending position of the center line in the width direction of the contact piece.

[0035] Furthermore, the part of the contact piece that contacts the contact spring claw after insertion is located between two crimping parts in the extending direction of the inner insertion part.

[0036] Furthermore, the stacked structure is a double-layer structure, with two contact pieces folded together to form the stacked structure. One contact piece forms an integral contact piece that is integrally connected to the main body of the charging socket current terminal, and the other contact piece forms a folded contact piece that is bent relative to the integral contact piece. One side of the two contact pieces in the width direction is integrally bent and connected, and the other side edge is flush. The length direction of the contact pieces is consistent with the insertion direction of the charging socket current terminal, and one end of the integral contact piece in the length direction is integrally connected to the main body of the charging socket current terminal.

[0037] Furthermore, the stacked structure is folded and rolled to form a flat structure, and the two outermost sheet-like portions in the thickness direction form the two contact sheets.

[0038] Furthermore, the stacked structure includes three or more sheet-like parts, any three sheet-like parts are Z-shaped folded structures, each sheet-like part has the same width, and the two outermost sheet-like parts in the thickness direction of the stacked structure form the two contact sheets. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the charging connector of this utility model; Figure 2 for Figure 1 A schematic diagram showing the charging connector from one side of the rear end; Figure 3 for Figure 1 A cross-sectional schematic diagram of the charging dock; Figure 4 for Figure 1 A schematic diagram showing the rear side view of the charging dock; Figure 5 for Figure 1 A schematic diagram of the head side of the charging dock after removing its head shell and insulator; Figure 6 for Figure 1 A schematic diagram of the terminal and circuit board mating structure of the charging dock; Figure 7 for Figure 1 A schematic diagram of the wire harness connector; Figure 8 for Figure 7 A cross-sectional schematic diagram of the wire harness connector in the diagram; Figure 9 for Figure 1 A schematic diagram of the connection point between the charging dock and the wiring harness connector; Figure 10 for Figure 9 A schematic diagram of the current terminals of the charging dock; Figure 11 This is a schematic diagram of the stacked structure of the current terminal tail in Embodiment 2 of the charging connector of this utility model; Figure 12 This is a schematic diagram of the stacked structure of the current terminal tail in Embodiment 3 of the charging connector of this utility model.

[0040] In the diagram: 10, Charging base; 20, Wire harness connector; 30, Electronic lock; 40, Wire harness; 11, Socket head housing; 12, Socket insulator; 13, Socket tail housing; 14, Circuit board; 15, Current terminal; 150, Internal insertion part; 151, Integrated contact piece; 152, Folded contact piece; 153, Bending position; 154, Riveting part; 155, Transition part; 156, Rounded part; 16, Signal terminal; 17, Interlocking pin; 18, Circuit board pin; 19, Fixing screw; 110, Socket sealing ring; 21, Plug housing; 22, Plug tail cover; 23, Power socket; 231, Contact spring claw; 24, Interlocking socket; 25, Plug sealing ring; 26, Wire harness sealing sleeve; 101, First contact piece; 102, Second contact piece. Detailed Implementation

[0041] The basic concept of the charging base current terminal of this utility model is to make full use of the width of the inner plug part to form a sufficiently wide contact piece, thereby forming a sufficiently wide contact surface. Both contact claws make contact with the complete contact surface, which is not easy to be damaged by friction during the plugging process, and is conducive to reliable conductive contact.

[0042] The technical solution of this utility model will be described in detail below with reference to specific embodiments.

[0043] Embodiment 1 of the charging connector of this utility model: like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, the charging connector includes a charging base 10, a wire harness connector 20, a circuit board connector 14, and an electronic lock 30. The head of the charging base 10 is used to connect to the charging gun. Both the wire harness connector 20 and the circuit board connector 14 are connected to the tail of the charging base 10. The wire harness connector 20 is connected to a wire harness 40 for transmitting current during charging. The circuit board connector 14 is used for signal transmission. The electronic lock 30 is fixedly mounted on the housing of the charging base 10. When the charging gun is mated with the charging base 10, the locking pin of the electronic lock 30 is inserted into the pin hole on the charging gun, thereby locking the charging gun to the charging base 10. The wire harness connector 20 is pluggable and detachable from the charging base 10 for easy maintenance.

[0044] The charging base 10 includes a socket head housing 11, a socket insulator 12, a socket tail housing 13, a circuit board 14, current terminals 15, and signal terminals 16. The socket head housing 11, socket insulator 12, and socket tail housing 13 are arranged sequentially and fixedly connected along the charging base 10 from head to tail. With the head-to-tail direction as the front-to-back direction, the external connector for the charging gun faces forward, and the internal connector for the wiring harness connector 20 and the circuit board 14 connector faces backward. The socket head housing 11 has a square flange for easy fixing to the vehicle body with screws. The socket insulator 12 has a portion extending into the socket head housing 11 and a portion located at the rear of the socket head housing 11. A sealing ring is provided between the outer wall of the socket insulator 12 and the inner wall of the socket head housing 11. The socket tail housing 13 is located behind the socket insulator 12, and the rear side of the socket insulator 12 is sealed to the front side of the socket tail housing 13 by a socket sealing ring 110. The socket head housing 11, socket insulator 12, and socket tail housing 13 are fixed together by four fixing screws 19, which are located at the four corners of the socket tail housing 13. A protective cover is also installed on the front side of the socket head housing 11, which can open or close the external plug-in terminal of the charging socket 10.

[0045] The socket insulator 12 is the insulator of the charging base 10. The socket insulator 12 has mounting cavities for installing current terminals 15 and signal terminals 16. The current terminals 15 are used to transmit power current during charging. In this embodiment, there are five current terminals 15 for transmitting three-phase AC power, using a three-phase four-wire system. It is compatible with both single-phase and three-phase systems. If single-phase is used, two of the terminal mounting holes are plugged with rubber stoppers, and the terminals are not assembled.

[0046] A circuit board 14 is installed in the cavity between the socket insulator 12 and the socket tail housing 13. The circuit board 14 is arranged perpendicular to the front-to-back direction. Figure 6 The circuit board 14 has a clearance hole for the current terminal 15. The tail of the current terminal 15 passes through the circuit board 14 and extends into the current plug engagement cavity of the socket tail housing 13. The current plug engagement cavity and the tail of the current terminal 15 within it constitute an internal insertion interface for the wire harness connector 20 to be inserted. There are two signal terminals 16, arranged side by side, located above each current terminal 15. The tail of the signal terminal 16 passes through the circuit board 14 and is connected to the circuit of the circuit board 14. The heads of the signal terminal 16 and the current terminal 15 are used to connect with the corresponding terminals of the charging gun.

[0047] Circuit board 14 is equipped with interlocking pins 17 and circuit board pins 18. There is a pair of interlocking pins 17 and multiple circuit board pins 18 arranged in an array. The rear end of each interlocking pin 17 passes through the socket tail housing 13 and extends into the current plug mating cavity. The rear end of each circuit board pin 18 passes through the socket tail housing 13 and extends into the signal plug mating cavity. The signal plug mating cavity and the tail ends of the circuit board pins 18 within it form an internal insertion interface for the connector of circuit board 14 to be inserted. The interlocking pins 17 are electrically connected to their corresponding circuit board pins 18 via circuitry on circuit board 14. Each circuit board pin 18 is located below each current terminal 15.

[0048] Because the space required for arranging each circuit board pin 18 is small, while the space required for arranging each current terminal 15 is large, the distance between the two upper fixing screws 19 in the left-right direction is large, while the distance between the two lower fixing screws 19 in the left-right direction is small. Correspondingly, the upper left-right dimension of the socket sealing ring 110 is large, while the lower left-right dimension is small. Each fixing screw 19 is located outside the socket sealing ring 110, and the terminals and pins are located within the area enclosed by the socket sealing ring 110. The structure is compact, reducing the radial dimension of the charging socket 10.

[0049] Combination Figure 7 and Figure 8 The wire harness connector 20 includes a plug housing 21, a plug tail cover 22, and a power socket 23 and an interlock socket 24 installed in the plug housing 21. The head of the power socket 23 is used to insert into the tail of the current terminal 15 of the charging base 10, and the tail of the power socket 23 is used to crimp or solder the wires of the wire harness 40. The tail of the plug housing 21 is provided with a wire harness sealing sleeve 26. The wire harness 40 passes through the wire harness sealing sleeve 26 and the plug tail cover 22. The plug tail cover 22 is fixedly connected to the tail end of the plug housing 21. The head of the plug housing 21 is provided with a mating cavity for fitting into the socket tail housing 13 of the charging base 10. The mating cavity is provided with a plug sealing ring 25 for sealing the insertion part of the socket tail housing 13.

[0050] Interlocking socket 24 is used to mate and short-circuit two interlocking pins 17. The pins are soldered to circuit board 14 and connected to interlocking socket 24 to enable the low-voltage circuit to conduct. The circuit of interlocking pin 17 is connected to circuit board pin 18 to transmit a conduction signal. The function of the interlocking circuit is to control the conduction of the high-voltage power circuit with a low-voltage signal. Only when interlocking pin 17 is connected to interlocking socket 24 will the system detect the conduction signal, control the conduction of the high-voltage circuit, and ensure safe power supply.

[0051] The power sockets 23 of the wire harness connector 20 correspond one-to-one with the current terminals 15 of the charging dock 10. The power sockets 23 constitute the terminals of the wire harness connector 20 that are plugged into the current terminals 15 of the charging dock 10. Figure 9 The power jack 23 has a clip-type insertion structure at its head, which includes two opposing contact springs 231. The current terminal 15 has an inward insertion part 150, which is a insert structure. The inward insertion part 150 is used to insert between the two opposing contact springs 231 of the corresponding terminal of the adapter wire harness connector 20. The two contact springs 231 elastically abut against the two sides of the insert in the thickness direction and form a line contact. After the wire harness connector 20 is inserted into the charging base 10, the two can be locked together by the locking structure to ensure reliable insertion.

[0052] The current terminal 15 of the charging base 10 is formed by sheet stamping and rolling. Its main body is formed into a cylinder by rolling. The front end of the cylinder has a contact structure that mates with the charging gun terminal, and the rear end has a folded portion 156. The folded portion 156 and the inner insertion portion 150 are connected as one unit by a transition portion 155. A sealing body is provided on the front side of the folded portion 156 on the current terminal 15 to isolate the charged cavity from the external environment. The folded portion 156 is used to contact the temperature sensor on the circuit board 14 of the charging base 10 to measure the heat generated during terminal charging. The inner insertion portion 150 has a flat structure and is formed by folding and flattening the sheet portion at the tail of the current terminal 15. The transition portion 155 is located on one side of the center line of the cylinder of the current terminal 15. The center line of the thickness direction of the inner insertion portion 150 is collinear with the center line of the cylinder, so that the inner insertion portion 150 is in a central position for easy installation.

[0053] The inner contact portion has a length direction, a width direction, and a thickness direction. The length direction is consistent with the insertion direction, and the thickness direction is consistent with the sheet thickness direction. In this embodiment, the length direction is the front-to-back direction, the thickness direction is the up-down direction, and the width direction is the left-to-right direction.

[0054] Combination Figure 10The inner insertion portion 150 is a folded lamination structure. The lamination structure has two contact pieces for conductive contact with the two contact claws 231 respectively. The lamination structure is a double-layer structure, with the two contact pieces folded together to form the lamination structure. The two contact pieces constitute two sheet-like parts of the lamination structure. The contact pieces have ends facing away from the folded position, and the ends of the contact pieces extend to the corresponding edges of the lamination structure. The edges of the lamination structure are the edges at the maximum dimension in the width direction of the entire inner insertion portion. One contact piece forms an integral contact piece 151, which is integrally connected to the main body of the current terminal 15 of the charging base 10. The other contact piece forms a folded contact piece 152, which is bent relative to the integral contact piece 151. One end of the folded contact piece 152 at the back-bent position 153 extends to the edge of the integral contact piece 151. The two contact pieces are positioned opposite each other in the thickness direction for the two contact claws 231 of the power socket 23 of the wire harness connector 20 to abut against each other. The width of the two contact pieces meets the contact requirements of the contact claws 231 and the inner insertion portion 150. The width of the contact piece is not less than the width of the contact claws 231. By utilizing the width of the inner insertion portion 150 to form a sufficiently wide contact piece, a sufficiently wide contact surface is formed. When the current terminal 15 of the charging base 10 is inserted between the two opposing contact claws 231 of the corresponding terminal of the adapter wire harness connector 20, both contact claws 231 make contact with the complete contact surface, which is not easily damaged by friction during the insertion process, thus promoting reliable conductive contact.

[0055] Two contact pieces are integrally bent and connected on one side along their width, while the other side has flush edges. One side of the contact piece along its width is located at bend position 153, and the end facing away from bend position 153 is located on the other side. The ends at bend position 153 are integrally connected, and the fold line of the two contact pieces is at bend position 153. The width and thickness of the integral contact piece 151 and the folded contact piece 152 are equal. The length direction of the contact pieces is consistent with the insertion direction of the current terminal 15 of the charging base 10. One end of the integral contact piece 151 along its length is integrally connected to the main body of the current terminal 15 of the charging base 10, and the other end extends backward. The two contact pieces are the same length, with only one fold line. They are folded only on one side along their width, without folding on the other side, making the width of both contact pieces sufficiently large. The folded contact piece 152 is not connected to the main body of the current terminal 15 and is located on the side of the transition portion 155 near the center line of the terminal. The folded contact piece 152 is folded relative to the integral contact piece 151 at the bending position 153, and the two contact pieces are brought into contact in the thickness direction, forming a flat inward insertion portion 150. The ends of the two contact pieces away from the main body are provided with chamfers and bevels to facilitate insertion between the two contact spring claws 231 of the matching power socket 23.

[0056] The two contact pieces also have reinforcing portions that securely connect them. These reinforcing portions are spaced apart from the bending position 153, which helps maintain the fit of the two contact pieces. In other embodiments, the reinforcing portions may be omitted, and the contact pieces may simply be folded in half, with the small gap between the two contact pieces not affecting the insertion.

[0057] The contact piece of the inner plug-in portion 150 has a contact portion. After the current terminal 15 is plugged into the power socket 23, the contact portion of the contact piece contacts the contact spring claw 231 of the power socket 23. The contact portion is offset from the reinforcement portion to ensure reliable conductive contact. In other embodiments, without affecting contact stability, the reinforcement portion can also contact the contact spring claw of the power socket.

[0058] In this embodiment, the reinforcing part is formed by pressing and riveting two contact pieces together. The reinforcing part is the riveted part 154. Pressing and riveting involves using a punch to press the contact pieces, creating a recess on one side of the contact piece and interlocking them on the other side to secure them together. The structure is simple and easy to operate. In other embodiments, the reinforcing part can also be formed by welding.

[0059] The riveting portion 154 does not protrude from the opposite sides of the two contact pieces; that is, the two contact surfaces formed by the opposite sides of the two contact pieces do not protrude. During riveting, one contact piece can be impacted, while the other contact piece is supported underneath, preventing its contact surface from deforming or causing concave deformation. Only the portion adjacent to the impacted contact piece undergoes greater deformation, resulting in a depression on the contact surface of the impacted contact piece. The other side forms a concave-convex fitting portion with the adjacent side of the contact piece below. In this embodiment, the riveting portion 154 on the contact surface of the folded contact piece 152 has a deeper depression, while the contact surface of the integral contact piece 151 has no depression or a shallower depression. The riveting portion 154 does not protrude, which reduces the resistance to the insertion of the inner insertion portion 150 between the two contact spring claws 231. In other embodiments, after the riveting portion is formed, one contact surface may have a depression, and the other contact surface may have a convex shape.

[0060] Two or more riveting portions 154 are provided at intervals along the extension direction of the inner insertion portion 150, which is also the front-to-back direction. In this embodiment, two riveting portions 154 are provided, one at the front and one at the back. The riveting portion 154 is located on the side away from the bending position 153 of the center line in the width direction of the contact piece. The center line in the width direction of the contact piece is divided into two halves in the width direction by this center line, so that the riveting portion 154 is biased towards the side flush with the edge and is set as close to one end as possible to improve the stability after reinforcement. After insertion, the contact portion of the contact piece is located between the two riveting portions 154 in the extension direction of the inner insertion portion, which is conducive to the contact surface and the contact spring claw forming sufficient contact in the width direction. In other embodiments, only one reinforcement portion may be provided, or the reinforcement portion may be located in the central area of ​​the contact piece.

[0061] Using two contact pieces folded together to form an insert improves the flatness of the contact surface, reduces damage during insertion, saves costs, and facilitates mass production.

[0062] Embodiment 2 of the charging connector of this utility model: The only difference between this embodiment and Embodiment 1 above is the folding form at the tail of the current terminal, such as... Figure 11 As shown, in this embodiment, the stacked structure formed by multiple folds at the tail of the current terminal includes three sheet-like portions. These three sheet-like portions form a Z-shaped folding structure. When the sheet material corresponding to the stacked structure is folded, the inner creases of two adjacent folds are located on both sides of the sheet material's thickness direction. In any two folds, the sheet-like portion formed by the later fold is located on the same side of the sheet-like portion formed by the previous fold. Each sheet-like portion has the same width. The two outermost sheet-like portions in the thickness direction of the stacked structure form two contact pieces, namely the first contact piece 101 and the second contact piece 102. At this time, in addition to having two contact pieces, the stacked structure also has sheet-like portions located before the two contact pieces. In other embodiments, the stacked structure may also have four or more sheet-like portions. Figure 11 The lines in the image are for illustrative purposes only. In reality, a single fold can create two sheet-like sections with no gap between them.

[0063] Embodiment 3 of the charging connector of this utility model: The only difference between this embodiment and Embodiment 1 above is the folding form at the tail of the current terminal, such as... Figure 12 As shown, in this embodiment, the lamination structure at the tail of the current terminal is formed into a flat structure by folding and rolling. In this embodiment, the lamination structure has three layers, but in other embodiments, it may have more layers. The width of the inner sheet-like portion is smaller than the width of the outer sheet-like portion. The two outermost sheet-like portions in the thickness direction of the lamination structure form two contact pieces, namely the first contact piece 101 and the second contact piece 102. At this time, in addition to having two contact pieces, the lamination structure also has a sheet-like portion located in front of the two contact pieces. Figure 12 The lines in the image are for illustrative purposes only. In reality, a single fold can create two sheet-like sections with no gap between them.

[0064] An embodiment of the charging socket current terminal of this utility model: The charging dock current terminal in this embodiment is the same as the charging dock current terminal in any of the above embodiments, and will not be described again here.

[0065] Embodiments of the charging dock of this utility model: The charging dock in this embodiment is the same as the charging dock in any of the above-described embodiments of the charging connector, and will not be described again here.

[0066] Finally, it should be noted that the above description is only a preferred embodiment of this utility model and is not intended to limit this utility model. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still make modifications to the technical solutions described in the foregoing embodiments without creative effort, or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A charging socket current terminal, comprising an inwardly inserting portion (150) disposed at its tail, the inwardly inserting portion being for insertion between two opposing contact springs (231) of corresponding terminals of an adapter harness connector (20), characterized in that, The inner plug-in portion (150) is a folded stacked structure. The stacked structure has at least two contact pieces for making conductive contact with the two contact claws respectively. At least one contact piece has an end facing away from the folded position (153). The end of the contact piece extends to the corresponding edge of the stacked structure. The two contact pieces have opposite sides in the thickness direction for the two contact claws to abut against each other respectively, and the width dimension meets the contact requirements between the contact claws (231) and the inner plug-in portion (150).

2. The charging dock current terminal according to claim 1, characterized in that, Each sheet-like part of the stacked structure is fixedly connected, and two contact sheets constitute two sheet-like parts. The fixed connection part of each sheet-like part constitutes a reinforcement part, and the reinforcement part is spaced apart from the bending position (153).

3. The charging dock current terminal according to claim 2, characterized in that, a definition is provided. The part of the contact piece that contacts the contact spring claw (231) after the current terminal of the charging base is plugged into the corresponding terminal of the wire harness connector (20) is the contact part, and the contact part is offset from the reinforcement part.

4. The charging socket current terminal according to claim 2 or 3, characterized in that, The various sheet-like parts are fixedly connected by press riveting, and the reinforced part is the press riveting part (154).

5. The charging dock current terminal according to claim 4, characterized in that, The riveted part (154) does not protrude from the opposite sides of the two contact pieces.

6. The charging dock current terminal according to claim 4, characterized in that, The riveting part (154) is provided at two or more intervals along the extension direction of the inner insertion part (150), and the riveting part (154) is located on the side away from the bending position (153) of the center line of the contact piece width direction.

7. The charging dock current terminal according to claim 6, characterized in that, The part of the contact piece that contacts the contact spring claw (231) after insertion is located between two crimped parts (154) in the extending direction of the inner insertion part (150).

8. The charging socket current terminal according to claim 1, 2, or 3, characterized in that, The stacked structure is a double-layer structure, with two contact pieces folded together to form the stacked structure. One contact piece forms an integral contact piece (151) that is integrally connected to the main body of the charging socket current terminal, and the other contact piece forms a folded contact piece (152) that is bent relative to the integral contact piece (151). The two contact pieces are integrally bent and connected on one side in the width direction, and the edges of the other side are flush. The length direction of the contact pieces is consistent with the insertion direction of the charging socket current terminal. One end of the integral contact piece (151) in the length direction is integrally connected to the main body of the charging socket current terminal.

9. The charging dock current terminal according to claim 1, 2, or 3, characterized in that, The stacked structure is formed into a flat structure by folding and rolling, and the two outermost sheet-like portions in the thickness direction form the two contact sheets.

10. The charging dock current terminal according to claim 1, 2, or 3, characterized in that, The laminated structure includes three or more sheet-like parts, any three sheet-like parts are Z-shaped folded structures, each sheet-like part has the same width, and the two outermost sheet-like parts in the thickness direction of the laminated structure form the two contact sheets.

11. A charging dock, characterized in that, It includes an insulator and a current terminal (15) installed in the insulator, wherein the current terminal is the charging socket current terminal as described in any one of claims 1-10.

12. A charging connector, characterized in that, It includes a charging base (10) and a wire harness connector (20) plugged into the tail of the charging base. The charging base includes an insulator and a current terminal (15) installed in the insulator. The current terminal is the charging base current terminal as described in any one of claims 1-10.

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