Rotary electrical connection structure, cable-winding type charger and forming method

Abstract

The present invention relates to a rotary electrical connection structure, a cable-winding type charger and a forming method. A charging module comprises at least one cable pulling mechanism, at least one rotary conductive plate, at least one conductive elastic piece group, at least one conductive piece group and a main circuit board. Each rotary conductive plate is mounted on the side of one corresponding cable pulling mechanism facing the main circuit board and rotates synchronously with the corresponding cable pulling mechanism. The conductive elastic piece group is mounted on the rotary conductive plate and is electrically connected to the rotary conductive plate. The main circuit board comprises a first conductive portion and a main charging portion, the conductive piece group being mounted on the first conductive portion and being electrically connected to the first conductive portion. The conductive piece group comprises multiple first conductive rings, the conductive elastic piece group comprises multiple second conductive rings, the multiple first conductive rings being concentric rings, the multiple second conductive rings being concentric rings, and each of the first conductive rings elastically abutting against one corresponding second conductive ring. The module has the characteristics of a small size, high reliability and convenient forming.

Description

Rotary electrical connection structure, winding type charger and forming method TECHNICAL FIELD

[0001] The present application relates to the technical field of charging modules, in particular to a rotary electrical connection structure, a winding type charger and a forming method. BACKGROUND

[0002] The winding type charging device is usually connected between the circuit boards by a conductor, one of the circuit boards is attached with the conductor, and the two rotate with the winding. The other flexible PCB is fixed to the device housing and does not rotate. The side of the flexible PCB facing the conductor is coated with a copper foil. The copper foil is in contact with the rotating conductor and is electrically connected. During the rotation of the winding to drive the conductor, the end surface of the conductor is in contact with the copper foil. Because the copper foil has only a micron level thickness, the copper foil is easily worn out, has a low service life, and the electrical connection fails if the copper foil is damaged. The charging device fails immediately. Moreover, the flexible PCB is connected to the external main board by soldering. The solder joints are prone to aging and breaking. The winding type charging device has a multi-layer stacked structure such as a support and a housing to increase the thickness and a complex assembly process. Therefore, a rotary electrical connection structure, a winding type charger and a forming method are needed to solve the above problems. TECHNICAL PROBLEM

[0003] Therefore, a rotary electrical connection structure, a winding type charger and a forming method are provided. TECHNICAL SOLUTION

[0004] A rotary electrical connection structure includes at least one pull wire mechanism, at least one rotating conductive plate, at least one conductive spring group, at least one conductive sheet group, and a main circuit board. Each rotating conductive plate is attached to the side of the corresponding pull wire mechanism facing the main circuit board and rotates synchronously with the corresponding pull wire mechanism. The conductive spring group is attached to the rotating conductive plate and is electrically connected to the rotating conductive plate. The main circuit board includes a first conductive part and a main charging part. The conductive sheet group is attached to the first conductive part and is electrically connected to the first conductive part. The conductive sheet group includes multiple first conductive rings. The conductive spring group includes multiple second conductive rings. Each ring of the multiple first conductive rings is a concentric circular ring. Each ring of the multiple second conductive rings is a concentric circular ring. Each first conductive ring is in elastic contact with the corresponding second conductive ring.

[0005] Preferably, a plurality of first conductive rings are provided, and a plurality of second conductive rings are provided, and a plurality of first indentations are provided between adjacent rings of the plurality of first conductive rings, and a plurality of second indentations are provided between adjacent rings of the plurality of second conductive rings, and each of the plurality of first conductive rings is in abutment and electrically connected with a corresponding one of the plurality of second conductive rings, and the first conductive portion and the rotating conductive plate are respectively provided with a plurality of hollow portions at positions corresponding to the plurality of first indentations and the plurality of second indentations.

[0006] Preferably, the conductive sheet group and the first indentations are integrally formed, and the conductive spring sheet group and the second indentations are integrally formed, and the first indentations are formed by stamping a plurality of first conductive rings with a pre-formed connecting strip therebetween, and the second indentations are formed by stamping a plurality of second conductive rings with a pre-formed connecting strip therebetween, and the conductive sheet group and the first indentations are made of the same material, and the conductive spring sheet group and the second indentations are made of the same material.

[0007] Preferably, the circumferential width and the radial length of the hollow portion are greater than the circumferential width and the radial length of the corresponding first indentation and second indentation, respectively, so as to avoid damaging the main circuit board and the rotating conductive plate when stamping the first indentation and the second indentation, and the hollow portion is a through hole or a blind hole penetrating the thickness of the main circuit board and the rotating conductive plate.

[0008] Preferably, the main charging portion includes a vehicle charging circuit, and the main charging portion is provided with a negative elastic member and a positive assembly, and one end of the pull wire of each pull wire mechanism is electrically connected with the rotating conductive plate, and the other end of the pull wire is connected with a charging interface.

[0009] Preferably, the spacing between adjacent rings of the first conductive ring and the second conductive ring is equal, and the number of rings of the first conductive ring and the second conductive ring is the same, and the ring diameters correspond to each other, and the conductive spring sheet group is welded or adhered to the rotating conductive plate, and the conductive sheet group is welded or adhered to the main circuit board.

[0010] Preferably, the main circuit board has opposite front and back surfaces, and the front surface and the back surface are respectively provided with one first conductive portion, and at least one pull wire mechanism, at least one rotating conductive plate, at least one conductive spring sheet group, and at least one conductive sheet group respectively correspond to two pull wire mechanisms, two rotating conductive plates, two conductive spring sheet groups, and two conductive sheet groups, and each pull wire mechanism, each rotating conductive plate, each conductive spring sheet group, and each conductive sheet group forms a winding and rotating module, and two winding and rotating modules are respectively elastically electrically connected with corresponding conductive spring sheet groups and conductive sheet groups to form a double-pull-wire charging module.

[0011] Preferably, each of the second conductive rings has a plurality of elastic contacts or pads uniformly distributed thereon, and the elastic contacts or pads on each of the second conductive rings extend towards the corresponding one of the first conductive rings, and each of the second conductive rings elastically abuts against the corresponding one of the first conductive rings through the elastic contacts or pads.

[0012] Preferably, each of the pull wire mechanisms has a receiving cavity, and the receiving cavity is provided with a winding assembly and a circuit board assembly, the winding assembly includes a winding disc and a winding shaft, the winding disc has a first disc surface and a second disc surface, the first disc surface faces the rotating conductive plate, the second disc surface is a back surface away from the first disc surface, the winding shaft is arranged at the center of the first disc surface, the charging wire is wound around the winding shaft, the second disc surface is provided with an annular groove, the back cover is provided with a T-shaped slot for assembling a T-shaped movable piece, one end of the T-shaped movable piece is clamped into the T-shaped slot, and the other end is clamped into the annular groove, and the charging wire is stretched and contracted to drive the winding disc to rotate, and the T-shaped movable piece can move relative to the annular groove.

[0013] Preferably, the annular groove includes a first annular guide groove, a second annular guide groove, a blocking portion and a guiding portion, the first annular guide groove is an outer ring groove, the second annular guide groove is an inner ring groove, and a hook portion and two openings are arranged on the annular wall between the first annular guide groove and the second annular guide groove, the two openings are respectively arranged on the left and right sides of the hook portion, the arch portion of the hook portion and the adjacent one of the openings form the guiding portion, and the hook portion and the other opening form the blocking portion.

[0014] Preferably, the T-shaped movable piece can move in the T-shaped slot to switch between the first annular guide groove and the second annular guide groove, when the charging wire is contracted, the T-shaped movable piece can enter the second annular guide groove from the first annular guide groove through the blocking portion, and when the charging wire is stretched, the T-shaped movable piece can enter the first annular guide groove from the second annular guide groove through the guiding portion.

[0015] Preferably, the length direction of the T-shaped slot is substantially consistent with the radial direction of the annular groove, and the position of the T-shaped slot corresponds to the first annular guide groove and the second annular guide groove.

[0016] Preferably, the rotating conductive plate is arranged on the second disc surface, and the circuit board assembly includes a first circuit board, a second circuit board and a conductive elastic sheet, the first circuit board is the rotating conductive plate and is arranged on the second disc surface, and the second circuit board is the main circuit board.

[0017] A winding type charger, comprising a charging shell, a winding device arranged in the charging shell, characterized in that the winding device comprises the rotating electric connection structure as described above, the pull wire mechanism comprises a rotating shaft, the rotating conductive plate has a through hole, and the rotating conductive plate is coaxially connected with the rotating shaft through the through hole.

[0018] In addition, a forming method of the rotating electric connection structure is provided, and the method comprises the following steps:

[0019] The original sheet of the conductive sheet group and the original sheet of the conductive spring sheet group are stamped and formed into a conductive sheet group precursor and a conductive spring sheet group precursor, the conductive sheet group precursor comprises a plurality of first conductive rings with a predetermined thickness, and the first conductive rings are connected with a first pre-pressing part; the conductive spring sheet group precursor comprises a plurality of second conductive rings with a predetermined thickness, and the second conductive rings are connected with a second pre-pressing part;

[0020] Hollow parts are stamped on the main circuit board and the rotating conductive plate at positions corresponding to the first pre-pressing part and the second pre-pressing part, respectively;

[0021] The conductive sheet group precursor is attached to the first conductive part of the main circuit board, and the conductive spring sheet group precursor is attached to the rotating conductive plate, so that each first pre-pressing part and each second pre-pressing part correspond to the corresponding hollow part;

[0022] After the attachment, the conductive sheet group precursor and the conductive spring sheet group precursor are stamped, respectively, the stamping after the attachment comprises that the first pre-pressing part and the second pre-pressing part are stamped to be disconnected or cut off along the stamping marks, so that the adjacent rings are isolated from each other, a plurality of first conductive rings isolated from each other and a plurality of second conductive rings isolated from each other are formed, and the first pre-pressing part and the second pre-pressing part correspond to the first stamping part and the second stamping part after the stamping. Advantages

[0023] Compared with the prior art, the present application has at least the following advantages:

[0024] Firstly, the rotating electric connection structure adopts the conductive sheet group to replace the micron-level copper foil printed on the traditional flexible circuit board, so that the conductive spring sheet group is in frictional contact with the conductive sheet group instead of the copper foil during the rotation of the conductive spring sheet group. Since the conductive sheet group is less likely to be damaged due to wear and tear and has a long service life, the reliability of the electric connection is enhanced. In addition, the main circuit board comprises a first conductive part and a main charging part, the first conductive part corresponds to the traditional flexible PCB board, and the main charging part corresponds to the traditional external main board. After the improvement, the PCB board no longer needs to be connected with the external main board through soldering wires, which reduces the aging and fracture of the soldering points. At the same time, the integrated design significantly saves space, so that the module volume is smaller and thinner.

[0025] Second, the forming method of the rotary electrical connection structure uses a first indentation part between adjacent rings of the first plurality of conductive rings and a second indentation part between adjacent rings of the second plurality of conductive rings, and the relative positions of the rings are ensured by the first and second indentation parts to facilitate integrated molding, so that when the conductive sheet group and the conductive spring sheet group are respectively attached to the main circuit board and the rotary conductive board, they can be attached in a whole multi-ring alignment without the need for separate ring alignment and attachment. BRIEF DESCRIPTION OF DRAWINGS

[0026] Fig. 1 is a schematic diagram of the steps of the forming method of the rotary electrical connection structure according to an embodiment of the present application.

[0027] Fig. 2 is a schematic diagram of a winding type charger according to an embodiment of the present application.

[0028] Fig. 3 is a schematic diagram of a winding type charger according to an embodiment of the present application.

[0029] Fig. 4 is a schematic diagram of a winding type charger according to an embodiment of the present application.

[0030] Fig. 5 is a schematic diagram of a conductive sheet group of a rotary electrical connection structure according to an embodiment of the present application.

[0031] Fig. 6 is a schematic diagram of a conductive spring sheet group of a rotary electrical connection structure according to an embodiment of the present application.

[0032] Fig. 7 is a schematic diagram of the structure of a stretchable cord storage part according to an embodiment of the present application.

[0033] Fig. 8 is a schematic diagram of the structure of a stretchable cord storage part according to an embodiment of the present application.

[0034] Fig. 9 is a schematic diagram of a ring-shaped groove and a T-shaped movable piece of a stretchable cord storage part according to an embodiment of the present application.

[0035] Fig. 10 is a schematic diagram of the assembly of a T-shaped groove and a T-shaped movable piece of a stretchable cord storage part according to an embodiment of the present application.

[0036] In the drawings,

[0037] 1, front cover; 11, cutting groove; 2, rear cover; 21, T-shaped groove; 22, T-shaped movable piece; 3, winding disc; 31, first disc surface; 32, second disc surface; 4, winding shaft; 5, circuit board assembly; 6, charging wire; 7, annular groove; 71, first annular guide groove; 72, second annular guide groove; 73, blocking part; 74, guide part; 75, hook part; 8, volute spring; 61, pull wire mechanism; 62, rotating conductive plate; 63, conductive spring piece group; 63a, elastic contact piece; 64, conductive piece group; 65, main circuit board; 66, first conductive part; 67, main charging part; 68, first conductive ring; 69, second conductive ring; 90a, first connecting strip; 91a, second connecting strip; 90, first indentation part; 91, second indentation part; 92, hollow part; 93, charging shell; 94, rotating shaft; 95, through hole; 96, negative elastic part; 97, positive assembly. Embodiments of the present application

[0038] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0039] Please refer to FIG. 1 to FIG. 4, which show a rotating electrical connection structure provided by an embodiment of the present application, including at least one pull wire mechanism 61, at least one rotating conductive plate 62, at least one conductive spring piece group 63, at least one conductive piece group 64, and one main circuit board 65. Each rotating conductive plate 62 is mounted on the side of the corresponding pull wire mechanism 61 facing the main circuit board 65 and rotates synchronously with the corresponding pull wire mechanism 61. The conductive spring piece group 63 is attached to the rotating conductive plate 62 and electrically connected to the rotating conductive plate 62. The main circuit board 65 includes a first conductive part 66 and a main charging part 67. The conductive piece group 64 is attached to the first conductive part 66 and electrically connected to the first conductive part 66. The conductive piece group 64 includes multiple main charging parts 68. The conductive spring piece group 63 includes multiple second conductive rings 69. Each ring of the multiple main charging parts 68 is a concentric circular ring, and each ring of the multiple second conductive rings 69 is a concentric circular ring. Each main charging part 68 is in elastic abutment with the corresponding second conductive ring 69.

[0040] Specifically, the first indentation part 90 is arranged between adjacent rings of each of the plurality of main charging parts 68, and the second indentation part 91 is arranged between adjacent rings of each of the plurality of second conductive rings 69. Each of the main charging parts 68 of the conductive sheet group 64 abuts and is electrically connected to the corresponding second conductive ring 69 of the conductive spring group 63. The first conductive part 66 and the rotating conductive plate 62 are respectively provided with hollow parts 92 at the positions corresponding to the plurality of first indentation parts 90 and the plurality of second indentation parts 91.

[0041] More specifically, the conductive sheet group 64 and the first indentation part 90 are integrally formed, and the conductive spring group 63 and the second indentation part 91 are integrally formed. The conductive sheet group 64 and the first indentation part 90 are made of the same material, and the conductive spring group 63 and the second indentation part 91 are made of the same material.

[0042] In some specific embodiments, the conductive sheet group 64 and the first indentation part 90 are integrally formed by stamping, and the conductive spring group 63 and the second indentation part 91 are integrally formed by stamping. When integrally formed by stamping, the pre-set connecting strips between adjacent rings are partially broken at the connecting positions of the ring walls. Preferably, the connecting strips can be broken by 1 / 3 or 1 / 2. After the conductive spring group 63 and the conductive sheet group 64 are attached to the circuit board, the unbroken parts are completely broken by stamping equipment or stamping auxiliary jigs. In FIG. 3 and FIG. 4, the state of the unbroken connecting strips is shown. In the figures, the plurality of main charging parts 68 of the conductive sheet group 64 are pre-provided with first connecting strips 90a, which are used for later breaking. Before forming, the first connecting strips 90a facilitate the connection and overall positioning of the rings to the first conductive part 66. After being attached, the first connecting strips 90a are broken to insulate and separate the rings. Similarly, the plurality of second conductive rings 69 of the conductive spring group 63 are pre-provided with second connecting strips 91a, which are used for later breaking. Before forming, the second connecting strips 91a facilitate the connection and overall positioning of the rings to the first conductive part 66. After being attached, the second connecting strips 91a are broken to insulate and separate the rings. More specifically, the first indentation part 90 and the second indentation part 91 are formed after the connecting strips are broken. The first indentation part 90 and the second indentation part 91 can be broken residual parts. More specifically, the connecting strips are pre-stamped or formed in other ways to facilitate secondary breaking marks, such as tooth marks or indentation marks. The breaking marks can be one or two, and preferably two. The upper and lower ends of the connecting strips in the radial direction connect the ring walls of two adjacent rings. Preferably, the two stamping marks are located at the upper and lower ends of the connecting strips connected to the ring walls, so as to ensure the isolation of the rings after breaking.

[0043] More specifically, the circumferential width and the radial length of the hollow part 92 are greater than the circumferential width and the radial length of the corresponding first indentation part 90 and second indentation part 91, respectively, so as to avoid damaging the main circuit board 65 and the rotating conductive plate 62 when the first indentation part 90 and the second indentation part 91 are broken.

[0044] More specifically, the hollow part 92 is a through hole or a blind hole through the thickness of the main circuit board 65 and the rotating conductive plate 62.

[0045] In one specific application, for example, applied to a vehicle charger, the main charging part includes a vehicle charging circuit. The main charging part 67 is provided with a negative elastic member 96 and a positive assembly 97; the negative elastic member 96 is a two-piece structure. One end of the pull wire of each pull wire mechanism 61 is electrically connected to the rotating conductive plate 62, and the other end is connected to the charging interface 941. Of course, it can be understood that the main charging part 67 can also have other charging structures, such as including a wireless charging circuit, etc.

[0046] Preferably, the spacing between adjacent rings of the first conductive ring 68 and the second conductive ring 69 is equal, the number of rings of the first conductive ring 68 and the second conductive ring 69 is the same, and the ring diameters correspond to each other. The conductive spring group 63 is welded or adhered to the rotating conductive plate 62, and the conductive sheet group 64 is welded or adhered to the main circuit board 65.

[0047] In the illustrated embodiment, a single pull wire structure is used, that is, one pull mechanism 61, one rotating conductive plate 62, one conductive spring group 63, and one conductive sheet group 64 are provided. In another specific embodiment, a double pull wire structure is used, that is, two pull mechanisms 61, two rotating conductive plates 62, two conductive spring groups 63, and two conductive sheet groups 64 are provided. The main circuit board 65 has opposite front and back surfaces, and the front and back surfaces are respectively provided with one first conductive part 66. Each pull wire mechanism 61, each rotating conductive plate 62, each conductive spring group 63, and each conductive sheet group 64 form a winding rotation module, and the two winding rotation modules are respectively elastically electrically connected to the corresponding conductive spring group 63 and the conductive sheet group 64 to form a double pull wire charging module.

[0048] Specifically, the spacing between adjacent rings of the main charging part 68 and the second conductive ring 69 is equal, the number of rings of the main charging part 68 and the second conductive ring 69 is the same, and the ring diameters correspond to each other.

[0049] Specifically, the conductive spring group 63 is welded or adhered to the rotating conductive plate 62, and the conductive sheet group 64 is welded or adhered to the main circuit board 65.

[0050] Specifically, each of the second conductive rings 69 has a plurality of uniformly distributed elastic contacts or pads, and the plurality of elastic contacts or pads on each of the second conductive rings 69 extend towards the direction of the corresponding one of the main charging portions 68. Each of the second conductive rings 69 elastically abuts against the corresponding one of the main charging portions 68 through the elastic contacts or pads. In the illustrated embodiment, the elastic contact 63a is taken as an example. The elastic contact 63a is a spring piece extending from the second conductive ring 69. More preferably, the elastic contact 63a is a piece strip punched out of the second conductive ring 69, i.e., the piece strip is punched or bent out of the second conductive ring 69. The width of the piece strip is less than the width of the corresponding ring, and the piece strip is curved towards the conductive piece group 64.

[0051] In some specific embodiments, the main circuit board 65 further comprises a second conductive portion, and the first conductive portion 66 and the second conductive portion are respectively distributed on two main surfaces of the main circuit board 65. The first conductive portion 66 comprises a plurality of annular grooves for mounting the conductive piece group 64. Preferably, pads or adhesives can be provided in the plurality of annular grooves, and the conductive piece group 64 is welded to the pads or attached to the plurality of annular grooves through the adhesives.

[0052] Referring to FIGS. 7-10, a charging cable storage device for a vehicle is provided. The device comprises a front cover 1 and a rear cover 2, which form a storage bin. A winding assembly and a circuit board assembly 5 are arranged in the storage bin. The winding assembly comprises a winding disc 3 and a winding shaft 4. The winding disc 3 has a first disc surface 31 and a second disc surface 32. The first disc surface 31 faces the front cover 1, and the second disc surface 32 faces the rear cover 2. The winding shaft 4 is arranged at the center of the first disc surface 31. The charging cable 6 is wound around the winding shaft 4. The second disc surface 32 is provided with an annular groove 7. The rear cover 2 is provided with a T-shaped slot 21 for assembling a T-shaped movable piece 22. One end of the T-shaped movable piece 22 is inserted into the T-shaped slot 21, and the other end is inserted into the annular groove 7. When the charging cable 6 is extended or retracted, the winding disc 3 rotates, and the T-shaped movable piece 22 moves relative to the annular groove 7.

[0053] Specifically, the annular groove 7 comprises a first annular guide groove 71, a second annular guide groove 72, a blocking portion 73, and a guide portion 74. The first annular guide groove 71 is an outer ring groove, and the second annular guide groove 72 is an inner ring groove. A hook portion 75 and two openings are arranged between the ring wall of the first annular guide groove 71 and the second annular guide groove 72. The two openings are respectively arranged on the left and right sides of the hook portion 75. The arch portion of the hook portion 75 and the adjacent one of the openings form the guide portion 74, and the hook portion 75 and the other opening form the blocking portion 73.

[0054] More specifically, the T-shaped movable member 22 can move inside the T-shaped groove 21 so as to be able to switch between the first ring guide groove 71 and the second ring guide groove 72, when the charging wire 6 is retracted, the T-shaped movable member 22 can enter the second ring guide groove 72 from the first ring guide groove 71 through the blocking part 73, when the charging wire 6 is stretched, the T-shaped movable member 22 can enter the first ring guide groove 71 from the second ring guide groove 72 through the guide part 74.

[0055] More specifically, the length direction of the T-shaped groove 21 is basically consistent with the radial direction of the ring-shaped groove 7, and the position of the T-shaped groove 21 corresponds to the first ring guide groove 71 and the second ring guide groove 72.

[0056] Specifically, the winding shaft 4 is integrally formed with the winding disc 3 or is connected as a whole, and when the charging wire 6 is stretched or retracted, the winding shaft 4 can drive the winding disc 3 to rotate.

[0057] Specifically, the winding assembly further comprises a volute spring 8, the front cover 1 comprises a cut groove 11, one end of the volute spring 8 is arranged in the cut groove 11, and the other end is arranged in the winding shaft 4.

[0058] In some specific embodiments, the charging wire 6 is pulled outwards, the ring-shaped groove 7 of the winding disc 3 is counterclockwise rotated by the winding shaft 4, from the relative motion, the T-shaped movable member 22 moves clockwise in the first ring guide groove 71 relative to the ring-shaped groove 7, after the hand is released, the charging wire 6 is automatically retracted under the rebound force of the volute spring 8, the ring-shaped groove 7 of the winding disc 3 is clockwise rotated by the winding shaft 4, at this time, from the relative motion, the T-shaped movable member 22 moves counterclockwise relative to the ring-shaped groove 7, the retraction motion is a distance to the blocking part 73, the T-shaped movable member 22 moves in the T-shaped groove 21, the T-shaped movable member 22 enters the blocking part 73 from the first ring guide groove 71, the T-shaped movable member 22 is blocked by the blocking part 73, the T-shaped movable member 22 cannot move relative to the ring-shaped groove 7, that is, the ring-shaped groove 7 and the T-shaped movable member 22 are relatively static, and the charging wire 6 is not automatically clamped again. When the charging wire 6 needs to be completely retracted after use, the charging wire 6 is pulled again, the T-shaped movable member 22 enters the second ring guide groove 72 from the blocking part 73, the T-shaped movable member 22 continues to move counterclockwise relative to the ring-shaped groove 7 in the second ring guide groove 72 after being released from the blocking, relatively, the ring-shaped groove 7 moves in the clockwise direction, and the charging wire 6 is retracted. The next time it needs to be used, the charging wire 6 is pulled outwards again, the winding shaft 4 drives the winding disc 3 to rotate counterclockwise, the T-shaped movable member 22 moves clockwise relative to the ring-shaped groove 7, at this time, the T-shaped movable member 22 can enter the first ring guide groove 71 from the second ring guide groove 72 through the guide part 74 when moving a distance to the guide part 74, and continue to move clockwise in the first ring guide groove 71, thus, the reciprocating stretching and retraction use can be completed.

[0059] In some specific embodiments, the T-shaped movable member 22 is preferably a pin, which cooperates with the T-shaped slot 21 to move. The T-shaped movable member 22 can move relatively inside the T-shaped slot 21 along the length direction of the T-shaped slot 21, and the T-shaped slot 21 has two ends, an inner end close to the center of the device and an outer end away from the center of the device, the outer end corresponds to the first ring guide slot 71, and the inner end corresponds to the second ring guide slot 72. When the T-shaped movable member 22 moves back and forth between the outer and inner ends of the T-shaped slot 21, the T-shaped movable member 22 can correspondingly switch back and forth between the first ring guide slot 71 and the second ring guide slot 72. When the charging wire 6 is clamped, the T-shaped movable member 22 is located at the blocking part 73, at this time, the T-shaped movable member 22 is correspondingly located at the middle position between the outer and inner ends of the T-shaped slot 21. Slightly move the charging wire 6 to make the T-shaped movable member 22 enter the second ring guide slot 72 from the blocking part 73, at this time, the T-shaped movable member 22 is correspondingly located at the inner end of the T-shaped slot 21.

[0060] Specifically, the circuit board assembly 5 comprises a first circuit board, a second circuit board and a conductive spring, the first circuit board is arranged on the second disc surface 32, the second circuit board is arranged on the rear cover 2, and the first circuit board is electrically connected with the second circuit board through the conductive spring.

[0061] More specifically, the conductive spring is a multi-path ring-shaped conductive spring, each path of the conductive spring is separately electrically connected to a circuit line in the first circuit board and the second circuit board to avoid short circuit.

[0062] More specifically, the multi-path ring-shaped conductive spring is a multi-path ring-shaped spring arranged in order of concentric circles, each path of the ring-shaped spring has a plurality of uniformly distributed elastic contact pieces or contacts, and the plurality of elastic contact pieces or contacts on each path of the ring-shaped spring are correspondingly arranged in the radial direction. More specifically, each path of the ring-shaped spring extends the elastic contact pieces or contacts towards the second circuit board.

[0063] More specifically, the second disc surface 32 is provided with a plurality of ring grooves in the center to accommodate the first circuit board and the multi-path ring-shaped conductive spring, and the second circuit board and the rear cover 2 are detachably connected.

[0064] When the pull wire is operated, the T-shaped movable piece 22 can move along the length direction of the T-shaped groove 21 in the interior of the T-shaped groove 21 when the charging wire 6 is stretched and contracted, the T-shaped groove 21 has two terminals, the inner terminal close to the center of the device and the outer terminal far from the center of the device, the outer terminal corresponds to the first ring guide groove 71 and the inner terminal corresponds to the second ring guide groove 72, when the T-shaped movable piece 22 moves back and forth between the outer and inner terminals of the T-shaped groove 21, the T-shaped movable piece 22 can correspondingly switch back and forth between the first ring guide groove 71 and the second ring guide groove 72, when the charging wire 6 is pulled out for a distance and is released, the T-shaped movable piece 22 moves relative to the ring-shaped groove 7, and is clamped into the blocking part 73 from the first ring guide groove 71, at this time, the T-shaped movable piece 22 corresponds to the middle position between the outer and inner terminals of the T-shaped groove 21, the charging wire 6 is automatically clamped, and the charging wire 6 is slightly moved again, so that the T-shaped movable piece 22 enters the second ring guide groove 72 from the blocking part 73, at this time, the T-shaped movable piece 22 corresponds to the inner terminal of the T-shaped groove 21, and the charging wire 6 is automatically wound, compared with the traditional charging wire for vehicle, the stretching and storage device for the charging wire for vehicle can automatically clamp the charging wire 6 after the charging wire 6 is stretched out, and can automatically wind the charging wire 6 after use, so that the use is convenient and the storage is neat.

[0065] The embodiment of the present application also provides a winding type charger, which comprises a charging shell 93 and a winding device arranged in the charging shell 93, wherein the winding device comprises the above-mentioned rotating electric connection structure, the pull wire mechanism 61 comprises a rotating shaft 94, and the rotating conductive plate 62 is coaxially connected with the rotating shaft 94 through a through hole 95.

[0066] The forming method of the above-mentioned rotating electric connection structure comprises the following steps:

[0067] In step one, the original sheet of the conductive sheet group 64 and the original sheet of the conductive spring sheet group 63 are stamped and formed into a conductive sheet group precursor and a conductive spring sheet group precursor, the conductive sheet group precursor comprises a plurality of main charging parts 68 with a predetermined thickness, and the main charging parts 68 are connected with first pre-pressing parts, and the conductive spring sheet group precursor comprises a plurality of second conductive rings 69 with a predetermined thickness, and the second conductive rings 69 are connected with second pre-pressing parts; specifically, the first pre-pressing parts and the second pre-pressing parts are the above-mentioned connecting strips.

[0068] In step one, the precursor of the conductive sheet group 64 and the precursor of the conductive spring sheet group 63 are formed in advance, and the connecting strips are arranged between the rings in the two precursors, that is, the ring bodies in each channel in the two precursors are connected as a whole. In this way, the two precursors can be integrally attached to the corresponding circuit board, and the main charging parts 68 or the second conductive rings 69 are attached to the circuit board at one time, without the need for separate attachment or separate forming of each channel, and the structure of the integrally formed multi-channel ring is formed by one-time stamping.

[0069] Step two, stamping hollow parts 92 on the main circuit board 65 and the rotating conductive plate 62 corresponding to the first pre-pressing part and the second pre-pressing part positions respectively;

[0070] Wherein, each step number does not represent the order. For example, step one and step two have no order, that is, the process of forming the first pre-pressing part of the conductive spring piece group 63 and the second pre-pressing part of the conductive piece group 64 has no order with the process of forming the hollow part 92 of the main circuit board 65 and the rotating conductive plate 62, which can be performed simultaneously or sequentially, and do not affect each other. The structure of the hollow part 92 is referred to the foregoing, and the forming method of the hollow part 92 is preferably formed during the forming of the circuit board or preformed when the preformed plate.

[0071] Step three, the conductive piece group precursor is attached to the first conductive part 66 of the main circuit board 65, and the conductive spring piece group precursor is attached to the rotating conductive plate 62, and each first pre-pressing part and each second pre-pressing part are respectively corresponding to the corresponding hollow part 92 during the attachment;

[0072] Specifically, in step three, the attachment of the present embodiment is preferably welding, and preferably a plurality of pads are provided on the main circuit board 65 and the rotating conductive plate 62, and the pads are evenly coated with solder paste, and the conductive piece group 64 and the conductive spring piece group 63 are fixed to the corresponding pads by reflow soldering process.

[0073] Step four, after attachment, the conductive piece group precursor and the conductive spring piece group precursor are stamped, and the first pre-pressing part and the second pre-pressing part are stamped to be broken or broken off along the indentation to isolate adjacent rings from each other, as shown in FIGS. 5 and 6, to form a plurality of main charging parts 68 and a plurality of second conductive rings 69 isolated from each other to avoid short circuit, and the first pre-pressing part and the second pre-pressing part correspond to the first indentation part 90 and the second indentation part 91 after stamping.

[0074] Specifically, in step four, the conductive piece group precursor and the conductive spring piece group precursor are stamped, and the connecting strips of the two precursors are partially broken in step one before stamping, and the upper surface of the connecting strip has an indentation or a crack, so that the connecting strip is completely broken along the trace during subsequent stamping, preferably 1 / 3 or 1 / 2 of the connecting strip is partially broken before subsequent stamping, and the indentation or crack is located at the upper and lower ends of the connecting strip connected with the ring wall to ensure the isolation between the rings after breaking. More specifically, the first indentation part 90 and the second indentation part 91 are formed after the connecting strip is broken, which can be a broken residual part.

[0075] In summary, the rotating electrical connection structure replaces the micron copper foil printed on the traditional flexible circuit board with the conductive sheet group 64, so that the rotating electrical connection structure changes the friction contact between the conductive spring group 63 and the copper foil to the friction contact between the conductive spring group 63 and the conductive sheet group 64 during the rotation of the conductive spring group 63. Since the conductive sheet group 64 is less likely to be damaged due to wear and tear and has a long service life, the reliability of the electrical connection is enhanced. Moreover, the main circuit board 65 includes a first conductive part 66 and a main charging part 67. The first conductive part 66 is equivalent to the traditional flexible PCB board, and the main charging part 67 is equivalent to the traditional external mainboard. After the improvement, the PCB board no longer needs to be connected to the external mainboard through soldering wires, reducing the risk of soldering point aging and breaking. At the same time, the integrated design significantly saves space, making the module smaller and thinner. The forming method of the rotating electrical connection structure uses a first indentation part 90 between adjacent rings of the multi-path main charging part 68 and a second indentation part 91 between adjacent rings of the multi-path second conductive ring 69. The first indentation part 90 and the second indentation part 91 ensure the relative position of each ring to facilitate integrated molding, so that the conductive sheet group 64 and the conductive spring group 63 can be attached to the main circuit board 65 and the rotating conductive plate 62, respectively, without the need for separate ring-by-ring attachment. Instead, they can be attached in a whole multi-ring alignment, which has high alignment accuracy.

[0076] It should be noted that the present application is not limited to the above-mentioned embodiments, and those skilled in the art can make other changes according to the inventive spirit of the present application. Any changes made in accordance with the inventive spirit of the present application should be included in the scope of protection claimed by the present application.

Claims

1. A rotating electrical connection structure, characterized in that, The application relates to a main circuit board comprising at least one pull wire mechanism, at least one rotating conductive plate, at least one conductive spring piece group, at least one conductive piece group and a main circuit board, each of the rotating conductive plates is arranged on one side of the main circuit board corresponding to the pull wire mechanism and rotates synchronously with the corresponding pull wire mechanism, the conductive spring piece group is attached to the rotating conductive plate and is electrically connected with the rotating conductive plate, the main circuit board comprises a first conductive part and a main charging part, the conductive piece group is attached to the first conductive part and is electrically connected with the first conductive part, the conductive piece group comprises a plurality of first conductive rings, the conductive spring piece group comprises a plurality of second conductive rings, each ring of the plurality of first conductive rings is a concentric circular ring, and each ring of the plurality of second conductive rings is a concentric circular ring, and each of the first conductive rings is elastically abutted with the corresponding second conductive ring.

2. A rotary electrical connection according to claim 1, wherein the first and second electrical connectors are each formed from a plurality of conductive elements. The adjacent rings of the plurality of first conductive rings have first indentation parts, and the adjacent rings of the plurality of second conductive rings have second indentation parts, each of the first conductive rings is abutted with and electrically connected with the corresponding second conductive ring, and the first conductive part and the rotating conductive plate are respectively provided with a plurality of hollow parts at the plurality of first indentation parts and the plurality of second indentation parts.

3. A rotary electrical connection according to claim 2, wherein the first and second electrical connectors are arranged to be electrically connected to each other by a plurality of electrical connections. The conductive piece group and the first indentation part are integrally formed, the conductive spring piece group and the second indentation part are integrally formed, the first indentation part is formed by stamping a connecting strip preformed between the plurality of first conductive rings, the second indentation part is formed by stamping a connecting strip preformed between the plurality of second conductive rings, the conductive piece group and the first indentation part are made of the same material, and the conductive spring piece group and the second indentation part are made of the same material.

4. A rotary electrical connection according to claim 2, wherein the first and second electrical connectors are each formed from a conductive material. The circumferential width and the radial length of the hollow part are respectively greater than the circumferential width and the radial length of the corresponding first indentation part and second indentation part, so as to avoid damaging the main circuit board and the rotating conductive plate when the first indentation part and the second indentation part are punched, and the hollow part is a through hole or a blind hole penetrating through the thickness of the main circuit board and the rotating conductive plate.

5. A rotary electrical connection according to claim 2, wherein the first and second electrical connectors are each formed from a conductive material. The main charging part comprises a vehicle charging circuit, the main charging part is provided with a negative elastic member and a positive assembly, one end of the pull wire of each pull wire mechanism is electrically connected with the rotating conductive plate, and the other end is connected with a charging interface.

6. A rotary electrical connection according to claim 1, wherein the first and second electrical connectors are each a pin and the first and second electrical connectors are each a socket. The spacing between the adjacent rings of the first conductive ring and the second conductive ring is equal, the number of the first conductive ring and the second conductive ring is the same, and the ring diameters are consistent, the conductive spring piece group is welded or adhered to the rotating conductive plate, and the conductive piece group is welded or adhered to the main circuit board.

7. A rotary electrical connection according to claim 1, wherein the first and second electrical connectors are each a pin and the first and second electrical connectors are each a socket. The main circuit board has opposite front and back surfaces, and the front and back surfaces are respectively provided with a first conductive part; at least one pull wire mechanism, at least one rotating conductive plate, at least one conductive spring piece group, and at least one conductive piece group; each pull wire mechanism, each rotating conductive plate, each conductive spring piece group, and each conductive piece group forms a winding rotation module, and two winding rotation modules are respectively elastically connected to corresponding conductive spring piece groups and conductive piece groups through the conductive spring piece groups to form a double-pull wire charging module.

8. A rotary electrical connection according to claim 1, wherein the first and second electrical connectors are each a pin and the first and second electrical connectors are each a socket. Each of the second conductive rings has a plurality of uniformly distributed elastic contact pieces or contacts, and the elastic contact pieces or contacts on each of the second conductive rings extend towards the direction of the corresponding first conductive ring.

9. A rotary electrical connection according to claim 1, wherein the first and second electrical connectors are each a pin and the first and second electrical connectors are each a socket. Each pull wire mechanism has a receiving bin, and the receiving bin is provided with a winding assembly and a circuit board assembly; the winding assembly includes a winding disc and a winding shaft; the winding disc has a first disc surface and a second disc surface; the first disc surface faces the rotating conductive plate, and the second disc surface is a back surface away from the first disc surface; the center of the disc surface of the first disc surface is provided with the winding shaft, and the charging wire is wound around the winding shaft; the second disc surface is provided with an annular groove; the back cover is provided with a T-shaped groove for assembling a T-shaped movable piece; one end of the T-shaped movable piece is clamped into the T-shaped groove, and the other end is clamped into the annular groove; when the charging wire is stretched or contracted, the winding disc rotates, and the T-shaped movable piece can move relative to the annular groove.

10. A rotary electrical connection according to claim 9, wherein the first and second electrical connectors are arranged to be electrically connected to each other by a plurality of electrical connections. The annular groove includes a first ring guide groove, a second ring guide groove, a blocking part, and a guide part; the first ring guide groove is an outer ring groove, and the second ring guide groove is an inner ring groove; the ring wall between the first ring guide groove and the second ring guide groove is provided with a hook part and two openings; the two openings are respectively distributed on the left and right sides of the hook part; the arch part of the hook part and the adjacent opening form the guide part; and the hook part and the other opening form the blocking part.

11. The charging cable storage device of claim 9, wherein the charging cable storage device is configured to be mounted on a vehicle. The T-shaped movable piece can move in the T-shaped groove to switch between the first ring guide groove and the second ring guide groove; when the charging wire is contracted, the T-shaped movable piece can enter the second ring guide groove from the first ring guide groove through the blocking part; and when the charging wire is stretched, the T-shaped movable piece can enter the first ring guide groove from the second ring guide groove through the guide part.

12. The charging cable storage device of claim 10, wherein the charging cable storage device is configured to be mounted to a vehicle. The length direction of the T-shaped groove is basically consistent with the radial direction of the annular groove, and the position of the T-shaped groove corresponds to the first ring guide groove and the second ring guide groove.

13. The charging cable storage device of claim 9, wherein the charging cable storage device is configured to be mounted to a vehicle. The rotating conductive plate is arranged on the second disc surface, and the circuit board assembly includes a first circuit board, a second circuit board, and a conductive spring piece; the first circuit board is the rotating conductive plate and is arranged on the second disc surface; and the second circuit board is the main circuit board.

14. A winding type charger comprising a charging case, a winding device provided in the charging case, characterized by, The winding device comprises the rotary electric connection structure as claimed in any one of claims 1-13, the pull wire mechanism comprises a rotating shaft, the rotary conductive plate has a through hole, and the rotary conductive plate is coaxially connected with the rotating shaft through the through hole.

15. A method of forming a rotary electrical connection structure according to any one of claims 1 to 13, wherein The method comprises the following steps: The original sheet of the conductive sheet group and the original sheet of the conductive spring sheet group are stamped and formed into a conductive sheet group precursor and a conductive spring sheet group precursor, the conductive sheet group precursor comprises a plurality of first conductive rings with a predetermined thickness, and the first conductive rings are connected with a first pre-pressing part; the conductive spring sheet group precursor comprises a plurality of second conductive rings with a predetermined thickness, and the second conductive rings are connected with a second pre-pressing part; Hollow parts are stamped on the main circuit board and the rotary conductive plate at positions corresponding to the first pre-pressing part and the second pre-pressing part, respectively; The conductive sheet group precursor is attached to the first conductive part of the main circuit board, and the conductive spring sheet group precursor is attached to the rotary conductive plate, so that each first pre-pressing part and each second pre-pressing part correspond to the corresponding hollow part, respectively; After the attachment, the conductive sheet group precursor and the conductive spring sheet group precursor are stamped, respectively, the stamping after the attachment comprises stamping off or cutting off the first pre-pressing part and the second pre-pressing part along the press mark, so that the adjacent rings are isolated from each other, a plurality of first conductive rings isolated from each other and a plurality of second conductive rings isolated from each other are formed, and the first pre-pressing part and the second pre-pressing part correspond to the first press mark part and the second press mark part after the stamping.

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