Integrated co-board stretch charging device and winding type charger

Abstract

The utility model relates to a kind of integral co-board telescopic line charging device and winding type charger, and charging device includes at least one pull line mechanism, at least one rotating conductive plate, at least one conductive sheet group and a main circuit board, each rotating conductive plate is installed in the side of corresponding one pull line mechanism towards main circuit board and rotates synchronously with corresponding pull line mechanism, and main circuit board includes first conductive part and main charging part, and conductive sheet group is attached to first conductive part and is electrically connected with first conductive part, and conductive sheet group includes multiple first conductive rings, and each ring of multiple first conductive rings is concentric circle separated from each other, and multiple elastic members or contacts corresponding to multiple first conductive rings are provided on each rotating conductive plate to make rotating conductive plate and corresponding conductive sheet group corresponding electric connection, and this charging device has the characteristics of compact structure, lightweight simplification, low cost, convenient forming.

Description

Technical Field

[0001] This utility model relates to the field of charging module technology, specifically to an integrated common plate telescopic cable charging device and a wound charger. Background Technology

[0002] Currently, the charging needs of various electronic devices are becoming increasingly diverse, and there are numerous application scenarios. For example, mobile phone chargers include wireless chargers, car chargers, desktop chargers, and so on. Existing charging devices typically employ telescopic or winding mechanisms for easy cable storage. Some simply wind up the data cable, while others combine a winding structure with a rotating electrical connection structure. In the rotating electrical connection structure, since the charging data cable includes multiple wire bundles such as signal lines and current lines, the rotating connection of the winding charging device also has multiple paths.

[0003] In the rotating electrical connection structure of a winding device, to achieve multi-path rotation and maintain electrical conductivity, a fixed circuit board and a rotating circuit board integrated with the winding device are typically used. The circuit boards are usually connected by conductors, with the conductor mounted on one of the circuit boards. The conductor is made into a coil structure of a certain width. This coil structure typically involves coating one side of the conductor with multiple ring-shaped copper foils, each ring corresponding to a signal or power line in the charging data line. During the rotation of the winding device, which drives the conductor to rotate, and while maintaining electrical conductivity between the rotating and fixed circuit boards, the copper foils, being only micrometers thick, are prone to wear and have a short lifespan. If the copper foils are damaged, the electrical connection fails, and the charging device immediately fails. Common winding charging devices have multi-layered stacked structures such as supports and housings, significantly increasing thickness and complicating assembly processes. Therefore, there is an urgent need for a compact, lightweight, simplified, and low-cost winding device to solve these problems. Utility Model Content

[0004] In view of this, an integrated common plate retractable wire charging device and a wound charger are provided, which are compact, lightweight, simplified, low-cost, and easy to mold.

[0005] An integrated retractable charging device includes at least one pull mechanism, at least one rotating conductive plate, at least one conductive sheet group, and a main circuit board. Each of the rotating conductive plates is mounted on the side of the corresponding pull mechanism facing the main circuit board and rotates synchronously with the corresponding pull mechanism. 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 electrically connected to the first conductive part. The conductive sheet group includes multiple first conductive rings, each of which is a concentric ring spaced apart from each other. Each of the rotating conductive plates is provided with multiple elastic elements or contacts corresponding to the multiple first conductive rings so that the rotating conductive plate is electrically connected to the corresponding conductive sheet group. In one specific implementation, the multiple elastic elements or contacts are surface mount elements attached to the rotating conductive plate. There are multiple surface mount elements arranged circumferentially. Each surface mount element has multiple mutually isolated springs or contacts, and each spring or contact in each surface mount element elastically abuts against the multiple first conductive rings. Adjacent rings of the multiple first conductive rings have a first indentation at their relative positions. The conductive sheet assembly and the first indentation are integrally formed. The first indentation is formed by stamping pre-formed connecting strips between the multiple first conductive rings. The conductive sheet assembly and the first indentation are made of the same material. The first conductive sheet has multiple cutouts corresponding to the multiple first indentations. Each indentation is a stamping mark or excess material.

[0006] In another specific implementation, the multiple elastic elements or contacts are conductive spring groups combined with the rotating conductive plate. The conductive spring groups are welded or bonded to the rotating conductive plate and electrically connected to it. The conductive spring groups include multiple second conductive rings, each of which is a concentric ring spaced apart from each other. Each first conductive ring elastically abuts against a corresponding second conductive ring. The spacing between adjacent rings of the first and second conductive rings is equal, and the number of rings of the first and second conductive rings is the same, with corresponding ring diameters. The conductive spring groups are bonded to the rotating conductive plate via pads or conductive adhesive, and the conductive spring groups are bonded to the main circuit board via pads or conductive adhesive.

[0007] Furthermore, the adjacent rings of the multiple first conductive rings have a first indentation portion at their relative positions, and the adjacent rings of the multiple second conductive rings have a second indentation portion at their relative positions. Each first conductive ring abuts against and is electrically connected to a corresponding second conductive ring. The first conductive portion and the rotating conductive plate are respectively provided with multiple hollow portions at the multiple first indentation portions and multiple second indentation portions. Each indentation portion is a stamping mark or leftover material.

[0008] Furthermore, the conductive sheet assembly and the first indentation portion are integrally formed, and the conductive spring sheet assembly and the second indentation portion are integrally formed; the first indentation portion is formed by stamping a pre-formed connecting strip between multiple first conductive rings, and the second indentation portion is formed by stamping a pre-formed connecting strip between multiple second conductive rings; the conductive sheet assembly and the first indentation portion are made of the same material, and the conductive spring sheet assembly and the second indentation portion are made of the same material.

[0009] Furthermore, the circumferential width and radial length of the hollow portion are greater than the circumferential width and radial length of the corresponding indentation portion, respectively, to avoid damaging the main circuit board and the rotating conductive plate when the indentation portion is broken. The hollow portion is a through hole or blind hole that penetrates the thickness of the main circuit board and the rotating conductive plate; the thickness of each conductive ring is 0.1mm - 0.5mm.

[0010] Specifically, the main charging unit includes a vehicle charging circuit; the main charging unit is provided with a negative electrode elastic element and a positive electrode assembly; one end of the pull wire of each pull mechanism is electrically connected to the rotating conductive plate, and the other end is connected to the first charging interface; each pull mechanism has a storage compartment, in which a winding assembly and a rotating conductive plate are provided, 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 the back surface away from the first disc surface, the winding shaft is located at the center of the first disc surface, the charging wire is wound around the winding shaft as the axis, and the rotating conductive plate is disposed on the second disc surface; the main charging circuit includes multiple functional electronic components; the multiple functional electronic components include one or more of capacitors, inductors, resistors, and diodes; the main charging circuit also includes one or more second charging interfaces; the second charging interface is a USB 2.0 interface, a USB 3.0 interface, a micro USB interface, a mini USB interface, or a USB Type-C interface. One or more of the following C interfaces; the free end of the cable of each cable pulling mechanism is connected to the first charging interface; the first charging interface is a Type-C interface, a Lightning interface, or a micro-B USB interface; the first charging interface is embedded in the top slot of the integrated common board retractable cable charging device, and the second charging interface is exposed on the top or side of the integrated common board retractable cable charging device.

[0011] Furthermore, the main circuit board has a front side and a back side, and the front side and the back side are respectively provided with a first conductive part; at least one wire pulling mechanism, at least one rotating conductive plate, and at least one conductive sheet group are respectively two wire pulling mechanisms, two rotating conductive plates, and two conductive sheet groups; each wire pulling mechanism, each rotating conductive plate, and each conductive sheet group respectively constitutes a winding rotating module, and the two winding rotating modules are elastically electrically connected to the corresponding conductive sheet group through their respective elastic elements or contacts to form a dual wire pulling charging module.

[0012] Furthermore, each of the second conductive rings has a plurality of uniformly distributed elastic contacts or points, and the plurality of elastic contacts or points on each of the second conductive rings extend toward the direction of the corresponding first conductive ring. Each of the second conductive rings elastically abuts against the corresponding first conductive ring through the elastic contacts or points.

[0013] And, a wound charger, comprising a charging housing and a winding device disposed within the charging housing, the winding device comprising the integrated common plate telescopic wire charging device as described above, the wire pulling mechanism comprising a rotating shaft, the rotating conductive plate having a through hole, the rotating conductive plate being coaxially connected to the rotating shaft through the through hole.

[0014] Compared with the prior art, this application has at least the following beneficial effects: First, this integrated common-plate retractable charging device replaces the micron-sized copper foil printed on the traditional flexible circuit board with conductive sheet groups. This allows the rotating conductive plate to change from frictional contact with the copper foil to frictional contact with the conductive sheet groups during the rotation of the integrated common-plate retractable charging device. Since the conductive sheet groups are less prone to damage due to wear and have a longer lifespan, the reliability of the electrical connection is enhanced. Second, the main circuit board includes a first conductive part and a main charging part. The first conductive part is equivalent to a traditional PCB board, and the main charging part is equivalent to a traditional external motherboard. The two are a whole circuit board, that is, the PCB board no longer needs to be connected to the external motherboard through soldering wires. The first conductive part is directly formed on the main circuit board of the main charging circuit, which reduces the aging and breakage of solder joints. At the same time, the integrated design significantly saves space, making the module smaller and thinner.

[0015] Third, the manufacturing method of this integrated common-plate telescopic charging device features indentations between adjacent conductive rings. These indentations ensure the relative position of each ring, facilitating integral molding. This eliminates the need for individual ring alignment and sequential mounting when conductive sheet assemblies and conductive spring assemblies are attached to the main circuit board or rotating conductive plate. Instead, multiple rings can be aligned and mounted simultaneously with high alignment accuracy. Furthermore, it fully utilizes a mature stamping process, pre-stamping each conductive ring with a predetermined thickness before mounting it to both sides of the main circuit board or rotating conductive plate, followed by a second stamping process to cut the connecting strips between rings. This streamlined production process improves efficiency.

[0016] Fourth, by making full use of the front and back of the main circuit board, a pair of wire pulling mechanisms and rotating conductive plates can be used simultaneously to form two wire-winding rotating modules, which is a dual-wire charging module. This improves product utilization, provides users with great convenience, enhances customer experience and stickiness, and can be widely used in various car chargers or other types of charging products. Attached Figure Description

[0017] Figure 1 This is a perspective view of a wound charger and its integrated common-plate retractable cable charging device according to an embodiment of this application.

[0018] Figure 2 yes Figure 1 An exploded view of the wound charger.

[0019] Figure 3 yes Figure 1 An exploded view of the wound charger from another perspective.

[0020] Figure 4 This is a schematic diagram of the conductive spring assembly of the integrated common plate telescopic wire charging device according to an embodiment of this application.

[0021] Figure 5 This is a schematic diagram of the conductive sheet assembly of the integrated common plate retractable wire charging device according to an embodiment of this application.

[0022] Figure 6 This is a three-dimensional exploded view of another embodiment of the integrated common plate retractable cable charging device of this application, with the example being a double pull-wire structure.

[0023] Figure 7 yes Figure 6 A three-dimensional exploded view of the integrated common plate telescopic charging device.

[0024] Figure 8 This is a schematic diagram of the manufacturing steps of the integrated common plate retractable cable charging device according to an embodiment of this application.

[0025] In the picture, 61. Cable pulling mechanism; 610. Storage compartment; 612. Winding reel; 62. Rotating conductive plate; 63. Conductive spring assembly; 63a. Elastic contact piece; 64. Conductive sheet assembly; 65. Main circuit board; 651. Functional electronic components; 652. Second charging interface; 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. Hollowed-out part; 93. Charging housing; 94. Rotating shaft; 941. First charging interface; 95. Through hole; 96. Negative electrode elastic element; 97. Positive electrode assembly. Detailed Implementation

[0026] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0027] Please see Figures 1 to 5This illustration shows a wound charger and its integrated common plate telescopic cable charging device provided by an embodiment of this application. The wound charger includes a charging housing 93 and a winding device disposed in the charging housing 93. The winding device is an integrated common plate telescopic cable charging device. The cable pulling mechanism includes a rotating shaft 94. The rotating conductive plate 62 has a through hole 95. The rotating conductive plate 62 is coaxially connected to the rotating shaft 94 through the through hole 95.

[0028] The integrated retractable charging device of this embodiment includes at least one pull mechanism 61, at least one rotating conductive plate 62, at least one conductive sheet group 64, and a main circuit board 65. Each rotating conductive plate 62 is mounted on the side of a corresponding pull mechanism 61 facing the main circuit board 65 and rotates synchronously with the corresponding pull mechanism 61. The main circuit board 65 includes a first conductive part 66 and a main charging part 67. The conductive sheet group 64 is attached to the first conductive part 66 and electrically connected to the first conductive part 66. The conductive sheet group 64 includes multiple first conductive rings 68, each of which is a concentric ring spaced apart from each other. The separation mainly refers to electrical insulation. Specifically, the main charging circuit 65 includes multiple functional electronic components 651. The multiple functional electronic components 651 include one or more of capacitors, inductors, resistors, and diodes; of course, transistors, Zener diodes, etc., may also be included. The multiple functional electronic components 651 are distributed on the main circuit board 65 in the remaining areas except for the first conductive part 66.

[0029] In one specific embodiment, the multiple elastic elements or contacts are surface mount elements mounted on the rotating conductive plate 62, i.e., the elastic elements or contact elements are directly mounted on the surface of the circuit board using SMC or SMD technology in circuit board printing. There are multiple surface mount elements arranged circumferentially, each surface mount element having multiple mutually isolated springs or contacts. The multiple springs or contacts in each surface mount element respectively correspond to elastically abutting against multiple first conductive rings 68. Adjacent rings of the multiple first conductive rings 68 have a first indentation 90 at their relative positions. The conductive sheet group 64 and the first indentation 90 are integrally formed. The first indentation 90 is formed by stamping pre-formed connecting strips between the multiple first conductive rings 68. Preferably, the conductive sheet group 66 and the first indentation 90 are made of the same material. The first conductive portion 66 has multiple cutouts 92 corresponding to the multiple first indentations 90; each indentation is a stamping mark or excess material. In this embodiment, the multi-elastomer or contact is integrally formed with the rotating conductive plate 62.

[0030] In another specific embodiment, the multiple elastic elements or contacts are conductive spring groups 63 attached to the rotating conductive plate 62. The conductive spring groups 63 are welded or bonded to the rotating conductive plate 62 and electrically connected to it. The conductive spring groups 63 include multiple second conductive rings 69, each ring of which is a concentric ring spaced apart from each other. Each first conductive ring 68 elastically abuts against a corresponding second conductive ring 69. The spacing between adjacent rings of the first and second conductive rings 68 and 69 is equal, and the number of rings in the first and second conductive rings 68 and 69 is the same, with corresponding ring diameters. The conductive spring groups 63 are attached to the rotating conductive plate 63 via solder pads or conductive adhesive, and the conductive sheet groups 64 are attached to the main circuit board 65 via solder pads or conductive adhesive. The thickness of each conductive ring in the first and second conductive rings 68 and 69 is preferably 0.1 mm - 0.5 mm. Of course, the first conductive ring 68 is mainly a friction-bearing component; therefore, the thickness of the first conductive ring 68 is preferably relatively thick, while the second conductive ring 69 can be set as a thinner film or, as in the previous embodiment, not have a second conductive ring body, as long as there is an elastic contact structure. In this embodiment, the first conductive ring 68 and the second conductive ring 69 are formed by stamping similarly to their corresponding plates; therefore, the first conductive ring 68 and the second conductive ring 69 can be formed in the same way and mass-produced, except that the second conductive ring 69 is stamped with additional spring pieces. In this embodiment, the conductive spring piece group 63 and the rotating conductive plate 62 are first formed separately, then combined and stamped a second time.

[0031] Specifically, the adjacent rings of the multiple first conductive rings 68 have a first indentation portion 90 at their relative positions, and the adjacent rings of the multiple second conductive rings 69 have a second indentation portion 91 at their relative positions. Each first conductive ring 68 abuts against and is electrically connected to a corresponding second conductive ring 69. The first conductive portion 66 and the rotating conductive plate 62 are provided with hollow portions 92 at the multiple first indentation portions 90 and the multiple second indentation portions 91, respectively.

[0032] More specifically, the conductive sheet group 64 and the first indentation portion 90 are integrally formed, the conductive spring sheet group 63 and the second indentation portion 91 are integrally formed, the conductive sheet group 64 and the first indentation portion 90 are made of the same material, and the conductive spring sheet group 63 and the second indentation portion 91 are made of the same material.

[0033] In some specific embodiments, the conductive sheet group 64 and the first indentation portion 90 are integrally formed by stamping, and the conductive spring sheet group 63 and the second indentation portion 91 are integrally formed by stamping. During integral stamping, the connection between the pre-set connecting strip between adjacent rings and the ring wall is partially broken. Preferably, the connection between the connecting strip and the ring wall can be broken by 1 / 3 or 1 / 2. After the conductive spring sheet 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 fixture. Figure 2 and Figure 3 The image shows the state where the connecting strip is not completely broken. Figure 2 and Figure 3 In the example, the conductive sheet group 64 has a first connecting strip 90a pre-installed between the multiple first conductive rings 68, which is used for later punching. Before molding, this facilitates the connection of each ring and the overall positioning and mounting onto the first conductive part 66. After mounting, the strip is punched to create an insulating gap between the rings. Similarly, the conductive spring sheet group 63 has a second connecting strip 91a pre-installed between the multiple second conductive rings 69, which is used for later punching. Before molding, this facilitates the connection of each ring and the overall positioning and mounting onto the first conductive part 66. After mounting, the strip is punched to create an insulating gap between the rings. More specifically, the first indentation portion 90 and the second indentation portion 91 are formed after the connecting strip is broken off, and can be broken remnants. More specifically, the connecting strip is at least pre-stamped or otherwise formed to form traces that facilitate secondary breaking, for example, it can be a tooth mark or a dent. The breaking traces can be one or two, preferably two. The upper and lower ends of the connecting strip in the radial direction connect the ring walls of two adjacent rings. Preferably, these two stamping traces are located at the upper and lower ends where the connecting strip connects to the ring wall, so as to ensure isolation between the rings after breaking off.

[0034] More specifically, the circumferential width and radial length of the cutout portion 92 are greater than the circumferential width and radial length of the corresponding first indentation portion 90 and second indentation portion 91, respectively, so as to avoid damage to the main circuit board 65 and the rotating conductive plate 62 when the first indentation portion 90 and the second indentation portion 91 are broken.

[0035] More specifically, the cutout portion 92 is a through hole or blind hole that penetrates the thickness of the main circuit board 65 and the rotating conductive plate 62.

[0036] In a specific application, such as a vehicle charger, the main charging unit includes a vehicle charging circuit. The main charging unit 67 is provided with a negative electrode elastic element 96 and a positive electrode assembly 97; the negative electrode elastic element 96 consists of two integrally connected spring-loaded structures. 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 first charging interface 941. It is understood that the main charging unit 67 can also have other charging structures, such as including a wireless charging circuit.

[0037] 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 are the same, and the ring diameters are the same. The conductive spring sheet group 63 is welded or bonded to the rotating conductive plate 62, and the conductive sheet group 64 is welded or bonded to the main circuit board 65.

[0038] In the illustrated embodiment, a single-wire structure is used, comprising one wire-pulling mechanism 61, one rotating conductive plate 62, and one conductive sheet group 64. In another specific embodiment, a double-wire structure is used, comprising two wire-pulling mechanisms 61, two rotating conductive plates 62, and two conductive sheet groups 64. The elastic element or contact can also be in two sets. For example, two conductive spring groups 63.

[0039] Specifically, such as Figure 6 and Figure 7 As shown, the main circuit board 65 has a front and a back side, and each of the front and back sides is provided with a first conductive part. Each wire pulling mechanism 61, each rotating conductive plate 62, each conductive spring group 63, and each conductive sheet group 64 constitute a wire winding rotation module. Two wire winding rotation modules are elastically electrically connected to their respective conductive spring groups 63 and the corresponding conductive sheet groups 64 to form a dual wire pulling charging module.

[0040] In the double-wire structure, the two winding rotating modules located on the front and back sides of the main circuit board 65 are basically symmetrical. Therefore, for simplicity, a set of winding rotating modules is used as an example. Specifically, the spacing between adjacent rings of the first conductive ring 68 and the second conductive ring 69 is equal, and the number of rings of the first conductive ring 68 and the second conductive ring 69 are the same, with corresponding ring diameters. More specifically, the conductive spring sheet group 63 is welded or bonded to the rotating conductive plate 62, and the conductive sheet group 64 is welded or bonded to the main circuit board 65, for example, formed on the main circuit board 65 by surface mount technology (SMD) or bonded to the main circuit board 65 by thermally conductive adhesive.

[0041] Specifically, each of the second conductive rings 69 has a plurality of evenly distributed elastic contacts or points. The elastic contacts or points on each of the second conductive rings 69 extend toward the corresponding first conductive ring 68. Each of the second conductive rings 69 elastically abuts against the corresponding first conductive ring 68 through the elastic contacts or points. In the illustrated embodiment, elastic contact 63a is taken as an example. Elastic contact 63a is a protruding spring extending from the second conductive ring 69. More preferably, elastic contact 63a is formed by stamping, that is, it is a strip stamped or bent from the second conductive ring 69. The width of the strip is smaller than the width of the corresponding ring, and the strip is raised toward the conductive sheet group 64.

[0042] In a specific embodiment of the double-wire design, two first conductive portions 66 are respectively distributed on the two main surfaces of the main circuit board 65. Each first conductive portion 66 includes a multi-channel annular groove for mounting the conductive sheet assembly 64. Preferably, solder pads or adhesive can be provided in the multi-channel annular groove, and the conductive sheet assembly 64 is soldered to the solder pads with solder paste or attached to the multi-channel annular groove with adhesive.

[0043] Specifically, as shown in the figure, each cable pulling mechanism 61 has a storage compartment 610, which contains a winding assembly and a rotating conductive plate. The winding assembly includes a winding disc 612 and a winding shaft 94. The winding disc 612 has a first disc surface and a second disc surface. The first disc surface faces the rotating conductive plate 62, and the second disc surface is the back surface away from the first disc surface. The rotating shaft 94 is located at the center of the first disc surface, and the charging cable is wound around the rotating shaft 94 as the axis. The rotating conductive plate 62 is disposed on the second disc surface.

[0044] In addition, the main charging circuit 65 also includes one or more second charging interfaces 652; the second charging interface is one or more of the following: USB 2.0 interface, USB 3.0 interface, micro USB interface, mini USB interface, and USB Type-C interface. The free end of the cable of each cable pulling mechanism is connected to the first charging interface 941; the first charging interface 941 is a Type-C interface, Lightning interface, or micro-B USB interface; the first charging interface 941 is embedded in the top slot of the integrated common board retractable cable charging device, and the second charging interface 652 is exposed on the top or side of the integrated common board retractable cable charging device.

[0045] The example of a wound charger provided in this application embodiment is a retractable cable vehicle charger. The charging housing 93 is a vehicle charger housing, and the winding device disposed within the charging housing 93 is the aforementioned integrated common-board retractable cable charging device. The main circuit board 65 is the vehicle charger main circuit board, which, in addition to having two first conductive parts, also has a vehicle charging circuit section, for example, having multiple functional electronic components. The main circuit board 65 has a lower extension portion, on which the negative electrode elastic element 96 and positive electrode component 97 are disposed, etc.

[0046] Please combine Figures 1 to 7 See Figure 8 , Figure 8 The above-described method for manufacturing the integrated common-plate retractable charging device includes the following steps: Step 1: The original sheets of conductive sheet group 64 and conductive spring sheet group 63 are stamped to form conductive sheet group precursor and conductive spring sheet group precursor. The conductive sheet group precursor includes multiple first conductive rings 68 with a predetermined thickness, and a first pre-compression part is connected between each first conductive ring 68. The conductive spring sheet group precursor includes multiple second conductive rings 69 with a predetermined thickness, and a second pre-compression part is connected between the multiple second conductive rings 69. Specifically, the first pre-compression part and the second pre-compression part are the aforementioned connecting strips.

[0047] In step one, the precursors of the conductive sheet group 64 and the conductive spring sheet group 63 are pre-formed. In these two precursors, connecting strips exist between the rings, meaning the rings in the two precursors are connected as a single unit. This facilitates integral mounting onto the corresponding circuit board. The first conductive ring 68 or the second conductive ring 69 is mounted onto the circuit board in one step, eliminating the need for separate mounting or individual forming of each ring. It is a one-time stamping process to form an integral multi-ring structure. Of course, if the multi-elastomer or contact is a surface-mount element mounted on the rotating conductive plate 62, then surface-mount technology is used to form the multi-elastomer or contact.

[0048] Step 2: Punch openwork portions 92 on the main circuit board 65 and the rotating conductive plate 62 corresponding to the positions of the first pre-pressed portion and the second pre-pressed portion, respectively; The numerical designations of the steps do not indicate a specific order. For example, steps one and two are not sequential; that is, the processes of forming the first pre-pressed portion of the conductive spring assembly 63 and the second pre-pressed portion of the conductive sheet assembly 64 are not sequential with the processes of forming the cutout portion 92 on the main circuit board 65 and the rotating conductive plate 62. They can be performed simultaneously or sequentially without affecting each other. The structure of the cutout portion 92 is as described above. Preferably, the cutout portion 92 is formed during the circuit board molding process or pre-formed during the prefabrication of the board.

[0049] Step 3: The conductive sheet assembly front body is attached to the first conductive part 66 of the main circuit board 65, and the conductive spring sheet assembly front body is attached to the rotating conductive plate 62. During the attachment, each first pre-pressing part and each second pre-pressing part are respectively aligned with the corresponding cutout part 92. Specifically, in step three, the mounting in this embodiment is preferably soldering. Preferably, multiple rings of solder pads are provided on the main circuit board 65 and the rotating conductive plate 62, and solder paste is evenly applied to each ring of the solder pads. The conductive sheet group 64 and the conductive spring group 63 are fixed to the corresponding solder pads by a reflow soldering process.

[0050] Step 4: After mounting, stamp the precursors of the conductive sheet assembly and the conductive spring assembly respectively. The stamping after mounting includes breaking or removing the first pre-pressed portion and the second pre-pressed portion along the indentation, so that adjacent rings are isolated from each other. Figure 4 , Figure 5 As shown, a first conductive ring 68 and a second conductive ring 69 that are isolated from each other are formed to avoid short circuits. The first pre-pressed part and the second pre-pressed part are stamped to form the first indented part 90 and the second indented part 91 respectively.

[0051] Specifically, in step four, the conductive sheet assembly precursor and the conductive spring assembly precursor are stamped. Before stamping, the connecting strips of these two precursors have been pre-stamped into partial fractures in step one, and the upper surface of the connecting strips has indentations or cracks so that the connecting strips can be completely broken along the marks during subsequent stamping. Preferably, the connecting strips are partially broken by 1 / 3 or 1 / 2 before subsequent stamping. The indentations or cracks are located at the upper and lower ends where the connecting strips connect to the ring walls, so as to ensure isolation between the rings after breaking. More specifically, the first indented portion 90 and the second indented portion 91 are formed after the connecting strips are broken, and can be broken remnants.

[0052] In summary, this integrated retractable charging device replaces the micron-sized copper foil printed on the traditional flexible circuit board with a conductive sheet assembly 64. This allows the conductive spring assembly 63 to change from frictional contact with the copper foil to frictional contact with the conductive sheet assembly 64 during rotation. Since the conductive sheet assembly 64 is less prone to wear and has a longer lifespan, the reliability of the electrical connection is enhanced. Furthermore, 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 a traditional flexible PCB board, and the main charging part 67 is equivalent to a traditional external motherboard. After this improvement, the PCB board no longer needs to be soldered. The wire connects to the external motherboard, reducing the likelihood of solder joint aging and breakage. The integrated design significantly saves space, making the module smaller and thinner. This integrated common-board retractable charging device manufacturing method uses a first indentation 90 between adjacent rings of the multi-path first conductive ring 68 and a second indentation 91 between adjacent rings of the multi-path second conductive ring 69. The first and second indentations 90 ensure the relative positions of each ring, facilitating integrated molding. This allows the conductive sheet group 64 and conductive spring sheet group 63 to be mounted on the main circuit board 65 and rotating conductive plate 62 respectively, eliminating the need for individual ring alignment and sequential mounting. Multiple rings can be aligned and mounted at once, achieving high alignment accuracy.

[0053] It should be noted that this application is not limited to the above-described embodiments. Based on the inventive spirit of this application, those skilled in the art can make other changes, and these changes made based on the inventive spirit of this application should be included within the scope of protection claimed in this application.

Claims

1. An integrated retractable charging device with a common plate, characterized in that, The device includes at least one wire-pulling mechanism, at least one rotating conductive plate, at least one conductive sheet group, and a main circuit board. Each of the rotating conductive plates is mounted on the side of the corresponding wire-pulling mechanism facing the main circuit board and rotates synchronously with the corresponding wire-pulling mechanism. 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 electrically connected to the first conductive part. The conductive sheet group includes multiple first conductive rings, each of which is a concentric ring spaced apart from each other. Each of the rotating conductive plates is provided with multiple elastic elements or contacts corresponding to the multiple first conductive rings so that the rotating conductive plate is electrically connected to the corresponding conductive sheet group.

2. The integrated common-plate telescopic charging device as described in claim 1, characterized in that, The multiple elastic elements or contacts are surface mount elements attached to the rotating conductive plate. There are multiple surface mount elements arranged circumferentially. Each surface mount element has multiple isolated elastic pieces or contacts, and each of these pieces or contacts elastically abuts against the multiple first conductive rings. Adjacent rings of the multiple first conductive rings have a first indentation at their respective positions. The conductive sheet assembly and the first indentation are integrally formed. The first indentation is formed by stamping pre-formed connecting strips between the multiple first conductive rings. The conductive sheet assembly and the first indentation are made of the same material. The first conductive sheet has multiple cutouts corresponding to the multiple first indentations. Each indentation is a stamping mark or excess material.

3. The integrated common-plate retractable cable charging device as described in claim 1, characterized in that, The multi-channel elastic element or contact is a conductive spring assembly attached to the rotating conductive plate. The conductive spring assembly is welded or bonded to the rotating conductive plate and electrically connected to it. The conductive spring assembly includes multiple second conductive rings, each of which is a concentric ring spaced apart from each other. Each first conductive ring elastically abuts against a corresponding second conductive ring. The spacing between adjacent rings of the first and second conductive rings is equal. The number of rings of the first and second conductive rings is the same, and their ring diameters are identical. The conductive spring assembly is attached to the rotating conductive plate via pads or conductive adhesive, and the conductive spring assembly is attached to the main circuit board via pads or conductive adhesive.

4. The integrated common-plate telescopic charging device as described in claim 3, characterized in that, The adjacent rings of the multiple first conductive rings have a first indentation at their relative positions, and the adjacent rings of the multiple second conductive rings have a second indentation at their relative positions. Each first conductive ring abuts against and is electrically connected to a corresponding second conductive ring. The first conductive part and the rotating conductive plate are respectively provided with multiple hollow parts at the multiple first indentation parts and multiple second indentation parts. Each indentation part is a stamping mark or leftover material.

5. The integrated common-plate retractable charging device as described in claim 4, characterized in that, The conductive sheet assembly and the first indentation portion are integrally formed, and the conductive spring assembly and the second indentation portion are integrally formed; the first indentation portion is formed by stamping a pre-formed connecting strip between multiple first conductive rings, and the second indentation portion is formed by stamping a pre-formed connecting strip between multiple second conductive rings; the conductive sheet assembly and the first indentation portion are made of the same material, and the conductive spring assembly and the second indentation portion are made of the same material.

6. The integrated common-plate telescopic charging device as described in claim 2 or 4, characterized in that, The circumferential width and radial length of the hollow portion are greater than the circumferential width and radial length of the corresponding indentation portion, respectively, to avoid damage to the main circuit board and the rotating conductive plate when the indentation portion is broken. The hollow portion is a through hole or blind hole that penetrates the thickness of the main circuit board and the rotating conductive plate. The thickness of each conductive ring is 0.1mm - 0.5mm.

7. The integrated common-plate telescopic charging device as described in claim 1, characterized in that, The main charging unit includes a vehicle charging circuit; the main charging unit is provided with a negative electrode elastic element and a positive electrode assembly; one end of the pull wire of each pull mechanism is electrically connected to the rotating conductive plate, and the other end is connected to the first charging interface; each pull mechanism has a storage compartment, in which a winding assembly and a rotating conductive plate are provided, 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 the back surface away from the first disc surface, the winding shaft is located at the center of the first disc surface, the charging wire is wound around the winding shaft as the axis, and the rotating conductive plate is disposed on the second disc surface; the main charging circuit includes multiple functional electronic components; the multiple functional electronic components include one or more of capacitors, inductors, resistors and diodes; the main charging circuit also includes one or more second charging interfaces; the second charging interface is a USB 2.0 interface, a USB 3.0 interface, a micro USB interface, a mini USB interface, a USB Type-C interface, etc. One or more of the following C interfaces; the free end of the cable of each cable pulling mechanism is connected to the first charging interface; the first charging interface is a Type-C interface, a Lightning interface, or a micro-B USB interface; the first charging interface is embedded in the top slot of the integrated common board retractable cable charging device, and the second charging interface is exposed on the top or side of the integrated common board retractable cable charging device.

8. The integrated common-plate telescopic charging device as described in claim 1, characterized in that, The main circuit board has a front and a back side, and the front and the back side are respectively provided with a first conductive part; at least one wire pulling mechanism, at least one rotating conductive plate, and at least one conductive sheet group are respectively two wire pulling mechanisms, two rotating conductive plates, and two conductive sheet groups; each wire pulling mechanism, each rotating conductive plate, and each conductive sheet group respectively form a winding rotating module, and the two winding rotating modules are elastically electrically connected to the corresponding conductive sheet group through their respective elastic elements or contacts to form a dual wire pulling charging module.

9. The integrated common-plate retractable cable charging device as described in claim 3, characterized in that, Each of the second conductive rings has a plurality of evenly distributed elastic contacts or points. The plurality of elastic contacts or points on each of the second conductive rings extend toward the direction of the corresponding first conductive ring. Each of the second conductive rings elastically abuts against the corresponding first conductive ring through the elastic contacts or points.

10. A wound-wire charger, comprising a charging housing and a winding device disposed within the charging housing, characterized in that, The winding device includes the integrated common plate telescopic wire charging device as described in any one of claims 1 to 9, the wire pulling mechanism includes a rotating shaft, the rotating conductive plate has a through hole, and the rotating conductive plate is coaxially connected to the rotating shaft through the through hole.

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