Winding type charger and rotary electrical connection structure thereof

Abstract

The utility model relates to a winding type charger and a rotary electrical connection structure thereof, the rotary electrical connection structure comprises a first circuit board, a second circuit board, a conductive elastic sheet group with a predetermined thickness and a conductive sheet group with a predetermined thickness, the conductive elastic sheet group is mounted on the first circuit board and is electrically connected with the first circuit board; the conducting strip group is attached to the second circuit board and electrically connected with the second circuit board, the conducting strip group comprises a plurality of annular elastic sheets, the conducting strip group comprises a plurality of conducting rings, a first indentation part is arranged between adjacent rings of the annular elastic sheets, a second indentation part is arranged between adjacent rings of the conducting rings, and the first indentation part and the second indentation part are arranged in parallel. Each annular elastic piece abuts against and is electrically connected with the corresponding conductive ring, the first circuit board and the second circuit board are provided with hollowed-out parts corresponding to the first indentation part and the second indentation part respectively, and the first indentation part and the second indentation part are indentations formed by stamping connecting strips preset between the adjacent rings respectively. The structure is long in service life, high in alignment precision and convenient to form.

Description

Technical Field

[0001] The utility model relates to the technical field of winding chargers, and particularly relates to a winding charger and a rotating electrical connection structure thereof. Background Art

[0002] The various circuit boards of a winding charging device are usually connected by a conductor. A conductor is mounted on one circuit board, and both rotate as the winding rotates. The other circuit board is fixed to the device housing and does not rotate. A copper foil is coated on the side of the circuit board fixed to the device housing facing the conductor. The copper foil abuts against and is electrically connected to the rotating conductor. During the process of the winding rotating and driving the conductor to rotate, the end face of the conductor contacts and rubs against the copper foil. Since the copper foil has a thickness of only a few micrometers, the copper foil is easily worn and has a low service life. If the copper foil is damaged, the electrical connection fails and the charging device fails immediately. Moreover, the electrical connection has high requirements for alignment accuracy. Therefore, there is an urgent need for a winding charger and a rotating electrical connection structure thereof to solve the above problems. Summary of the Utility Model

[0003] In view of this, a winding charger and a rotating electrical connection structure thereof with high service life, reliability, high alignment accuracy, and convenient molding are provided.

[0004] A rotating electrical connection structure of a winding charger includes a first circuit board, a second circuit board, a conductive elastic sheet group with a predetermined thickness, and a conductive sheet group with a predetermined thickness. The conductive elastic sheet group is mounted on the first circuit board and electrically connected to the first circuit board. The conductive sheet group is mounted on the second circuit board and electrically connected to the second circuit board. The conductive elastic sheet group includes multiple annular elastic sheets. The conductive sheet group includes multiple conductive rings. A first indentation part is provided between adjacent rings of the multiple annular elastic sheets. A second indentation part is provided between adjacent rings of the multiple conductive rings. Each annular elastic sheet abuts against and is electrically connected to a corresponding conductive ring. The first circuit board and the second circuit board are respectively provided with hollow parts corresponding to the first indentation part and the second indentation part. The first indentation part and the second indentation part are respectively formed by stamping a preset connecting strip between adjacent rings.

[0005] Further, the distances between adjacent rings of the multiple annular elastic sheets and the multiple conductive rings are equal. The number of rings of the multiple annular elastic sheets is the same as that of the multiple conductive rings, and the ring diameters correspond to each other.

[0006] Further, the multiple annular elastic sheets and the first indentation part are of an integrally formed structure. The multiple conductive rings and the second indentation part are of an integrally formed structure. The multiple annular elastic sheets and the first indentation part are made of the same material. The multiple conductive rings and the second indentation part are made of the same material.

[0007] Further, the circumferential width and radial length of the hollowed-out portion are respectively greater than the circumferential width and radial length of the corresponding first indentation portion and second indentation portion, so as to avoid damaging the first circuit board and the second circuit board when punching off the first indentation portion and the second indentation portion.

[0008] Furthermore, the hollowed-out portion is a through hole penetrating the thicknesses of the first circuit board and the second circuit board, or is a blind hole.

[0009] Further, the conductive elastic sheet group is welded or bonded to the first circuit board, and the conductive sheet group is welded or bonded to the second circuit board.

[0010] Further, the multiple-ring elastic sheets are multiple-ring elastic sheets arranged in the order of concentric circles, and the multiple conductive rings are multiple conductive rings arranged in the order of concentric circles; each ring elastic sheet has a plurality of uniformly distributed elastic contacts or contact points, and the plurality of elastic contacts or contact points on each ring elastic sheet are correspondingly arranged along the radial direction.

[0011] Furthermore, each ring elastic sheet extends the elastic contact or contact point in the direction towards the corresponding one of the conductive rings, and each ring elastic sheet is electrically connected to the corresponding one of the conductive rings through the elastic contact or contact point.

[0012] Further, the thickness range of the conductive sheet group is 0.1 mm or more, and both the conductive elastic sheet group and the conductive sheet group are made of copper material.

[0013] And, a winding charger includes a charging main body and a winding device provided in the charging main body, and the winding device includes the above-mentioned winding charger rotary electrical connection structure.

[0014] Compared with the prior art, the present utility model has at least the following beneficial effects:

[0015] First, the above-mentioned winding charger and its rotary electrical connection structure use a copper conductive sheet group with a thickness of 0.1 mm or more to replace the micron-level copper foil printed on the traditional circuit board, so that in the process of the winding rotation driving the conductive elastic sheet group to rotate, the conductive elastic sheet group changes from friction contact with the copper foil to friction contact with the conductive sheet group. Since the thickness of the conductive sheet group is increased compared with the copper foil, it is less likely to be damaged due to wear and has a high service life, and the reliability of the electrical connection is enhanced.

[0016] Second, in this winding charger and its rotating electrical connection structure, a first indentation part is adopted between adjacent rings of the multi-channel annular elastic pieces, and a second indentation part is adopted between adjacent rings of the multi-channel conductive rings. The relative positions of each ring are ensured through the first indentation part and the second indentation part to facilitate integral molding. Thus, when the conductive elastic piece group and the conductive piece group are respectively mounted on the first circuit board and the second circuit board, it is not necessary to separately align and mount each ring one by one. Instead, they can be integrally aligned and mounted at one time, with high alignment accuracy. Through stamping forming, industrial mass production can be achieved, and the mature stamping process can be fully utilized, greatly improving the operability and convenience of the process, enhancing the product quality, and improving the production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is an overall three-dimensional schematic diagram of a winding charger according to an embodiment of the present invention.

[0018] Figure 2 is an exploded schematic diagram of a winding charger according to an embodiment of the present invention.

[0019] Figure 3 is an exploded schematic diagram of a winding charger according to an embodiment of the present invention in another direction.

[0020] Figure 4 is a schematic diagram of the mounting of the first circuit board and the conductive elastic piece group of a winding charger and its rotating electrical connection structure according to an embodiment of the present invention.

[0021] Figure 5 is a schematic diagram of the mounting of the second circuit board and the conductive piece group of a winding charger and its rotating electrical connection structure according to an embodiment of the present invention.

[0022] Wherein,

[0023] 1. First circuit board; 2. Second circuit board; 3. Conductive elastic piece group; 31. First indentation part; 32. Annular elastic piece; 4. Conductive piece group; 41. Second indentation part; 42. Conductive ring; 5. Hollow part; 6. Front cover; 7. Rear cover; 8. Winding disc; 81. First disc surface; 82. Second disc surface; 9. Winding shaft; 10. Charging wire. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0025] Please refer toFigures 1 to 5 shows a rotating electrical connection structure of a winding charger provided by an embodiment of the present invention, including a first circuit board 1, a second circuit board 2, a conductive elastic sheet group 3 with a predetermined thickness, and a conductive sheet group 4 with a predetermined thickness. The conductive elastic sheet group 3 is mounted on the first circuit board 1 and electrically connected to the first circuit board 1. The conductive sheet group 4 is mounted on the second circuit board 2 and electrically connected to the second circuit board 2. The conductive elastic sheet group 3 includes multiple annular elastic sheets 32, and the conductive sheet group 4 includes multiple conductive rings 42. There is a first indentation part 31 between adjacent rings of the multiple annular elastic sheets 32, and there is a second indentation part 41 between adjacent rings of the multiple conductive rings 42. Each annular elastic sheet 32 abuts and is electrically connected to a corresponding conductive ring 42. The first circuit board 1 and the second circuit board 2 are respectively provided with hollow parts 5 at the positions corresponding to the first indentation part 31 and the second indentation part 41. The first indentation part 31 and the second indentation part 41 are respectively formed by stamping a preset connecting strip between adjacent rings.

[0026] Specifically, the distances between adjacent rings of the multiple annular elastic sheets 32 and the multiple conductive rings 42 are equal, the number of rings of the multiple annular elastic sheets 32 is the same as that of the multiple conductive rings 42, and the ring diameters correspond to each other.

[0027] Specifically, the multiple annular elastic sheets 32 and the first indentation part 31 are of a structure formed by integral stamping, the multiple conductive rings 42 and the second indentation part 41 are of a structure formed by integral stamping, the multiple annular elastic sheets 32 and the first indentation part 31 are made of the same material, and the multiple conductive rings 42 and the second indentation part 41 are made of the same material. When forming by integral stamping, the connection between the preset connecting strip between adjacent rings and the ring wall is locally broken. In some specific embodiments, the connection between the connecting strip and the ring wall can be broken by 1 / 3 or 1 / 2. After the conductive elastic sheet group 3 and the conductive sheet group 4 are mounted on the circuit board, the unbroken part is completely broken by a stamping device or a stamping auxiliary jig. In FIGS. 4 and 5, the state where the connecting strip is not completely broken is shown. More specifically, the first indentation part 31 and the second indentation part 41 are formed after the connecting strip is broken, and it can be a remaining broken part. More specifically, the connecting strip is at least pre-stamped or formed by other forming methods to form convenient secondary breaking traces. For example, it can be a tooth mark or a dent. The breaking traces can be one or two, preferably two. The connecting strip connects the ring walls of two adjacent rings at the upper and lower ends in the radial direction. Preferably, these two stamping traces are located at the upper and lower ends of the connection between the connecting strip and the ring wall to ensure isolation between rings after breaking.

[0028] Specifically, the circumferential width and radial length of the hollow portion 5 are respectively greater than the circumferential width and radial length of the corresponding first indentation portion 31 and second indentation portion 41, so as to avoid damaging the first circuit board 1 and the second circuit board 2 when punching off the first indentation portion 31 and the second indentation portion 41.

[0029] More specifically, the hollow portion 5 is a through hole penetrating the thicknesses of the first circuit board 1 and the second circuit board 2, or a blind hole.

[0030] Specifically, the conductive elastic sheet group 3 is welded or adhered to the first circuit board 1, and the conductive sheet group 4 is welded or adhered to the second circuit board 2. In some specific embodiments, it is preferred to provide multiple circles of pads on the first circuit board 1 and the second circuit board 2, and solder paste is evenly applied on each circle of pads. The conductive elastic sheet group 3 and the conductive sheet group 4 are fixed to the corresponding pads through a reflow soldering process.

[0031] Specifically, the multiple paths of annular elastic sheets 32 are multiple paths of annular elastic sheets 32 arranged in the order of concentric circles, and the multiple paths of conductive rings 42 are multiple paths of conductive rings 42 arranged in the order of concentric circles; each path of the annular elastic sheets 32 has a plurality of uniformly distributed elastic contacts or contact points, and the plurality of elastic contacts or contact points on each path of the annular elastic sheets 32 are correspondingly arranged along the circumferential direction. For example Figure 4 as shown, three elastic contacts are provided on each loop of the annular elastic sheet 32, and the three positions are evenly distributed on the same ring at equal intervals.

[0032] More specifically, each path of the annular elastic sheet 32 extends the elastic contact or contact point in the direction towards the corresponding path of the conductive ring 42, and each path of the annular elastic sheet 32 is electrically connected to the corresponding path of the conductive ring 42 through the elastic contact or contact point. More preferably, as Figure 4 shown in the example, elastic contacts are used, and the elastic contacts are provided on each path of the annular elastic sheets 32. The elastic contacts extend obliquely from the ring piece body.

[0033] Specifically, the thickness range of the conductive sheet group 4 is 0.1 mm or more, preferably 0.1 mm to 0.3 mm. The thickness is dozens of times the micron-level thickness of the copper foil printed on the traditional circuit board, and is more wear-resistant than the copper foil. Both the conductive elastic sheet group 3 and the conductive sheet group 4 are preferably made of copper materials with good electrical conductivity.

[0034] An embodiment of the present utility model further provides a winding charger, which includes a charging main body and a winding device disposed in the charging main body. The winding device includes the above-mentioned rotary electrical connection structure. In this embodiment, the charging main body is preferably a vehicle-mounted charging main body, which is internally provided with a winding disc 8 and wound with a charging cable 10. When the winding charger is inserted into the cigarette lighter, by pulling the winding disc 8, the charging cable 10 can be extended to facilitate charging at a relatively long distance. Preferably, the free end of the charging cable 10 can extend at least one charging interface, and more preferably three charging interfaces. For example, it includes a USB type-c interface, a Lightning interface, a MicroUSB interface, and so on.

[0035] Specifically, the winding charger further includes a front cover 6 and a rear cover 7. The front cover 6 and the rear cover 7 enclose to form a storage bin. A winding device is disposed in the storage bin. The winding device includes a winding disc 8, a winding shaft 9, and a rotary electrical connection structure. The winding disc 8 has a first disc surface 81 and a second disc surface 82. The first disc surface 81 faces the front cover 6, and the second disc surface 82 faces the rear cover 7. A winding shaft 9 is provided at the center of the disc surface of the first disc surface 81, and the charging cable 10 is wound around the winding shaft 9 as the axis. More specifically, a plurality of loop grooves are provided at the center of the second disc surface 82 to accommodate the first circuit board 1. The second circuit board 2 is detachably connected to the rear cover 7. The conductive elastic sheet group 3 is welded or adhered to the first circuit board 1, and the conductive sheet group 4 is welded or adhered to the second circuit board 2. Each loop-shaped elastic sheet 32 on the conductive elastic sheet group 3 abuts against and is electrically connected to the conductive ring 42 on the corresponding conductive sheet group 4. When the charging cable 10 is pulled out or retracted, the winding shaft 9 drives the winding disc 8 to rotate. The winding disc 8 drives the first circuit board 1 on the second disc surface 82 to rotate. During the rotation process, each loop-shaped elastic sheet 32 and the corresponding conductive ring 42 always maintain electrical connection.

[0036] In summary, the above-mentioned winding charger and its rotating electrical connection structure use a copper conductive sheet group 4 with a thickness of more than 0.1 mm to replace the micron-level copper foil printed on the traditional circuit board. During the process of the winding rotation driving the conductive elastic sheet group 3 to rotate, the conductive elastic sheet group 3 changes from friction contact with the copper foil to friction contact with the conductive sheet group 4. Since the thickness of the conductive sheet group 4 is increased compared with the copper foil, it is less likely to be damaged due to wear and has a high service life, and the reliability of the electrical connection is enhanced. Moreover, in this structure, a first indentation part 31 is adopted between adjacent rings of the multi-channel annular elastic sheet 32, and a second indentation part 41 is adopted between adjacent rings of the multi-channel conductive ring 42. The relative positions of each ring are ensured by the first indentation part 31 and the second indentation part 41 respectively, so that when the conductive elastic sheet group 3 and the conductive sheet group 4 are respectively mounted on the first circuit board 1 and the second circuit board 2 by integral molding, it is not necessary to align and mount each ring separately one by one, and the overall alignment can be carried out for one-time mounting, with high alignment accuracy. Through stamping forming, industrial mass production can be achieved, and the mature stamping process can be fully utilized, greatly improving the operability and convenience of the process, enhancing the product quality, and improving the production efficiency.

[0037] It should be noted that the present invention is not limited to the above-mentioned embodiments. According to the creative spirit of the present invention, those skilled in the art can also make other changes, and these changes made based on the creative spirit of the present invention should be included in the scope of protection required by the present invention.

Claims

1. A rotating electrical connection structure for a winding charger, characterized in that The rotary electrical connection structure includes a first circuit board, a second circuit board, a conductive elastic sheet group with a predetermined thickness, and a conductive sheet group with a predetermined thickness. The conductive elastic sheet group is mounted on the first circuit board and electrically connected to the first circuit board. The conductive sheet group is mounted on the second circuit board and electrically connected to the second circuit board. The conductive elastic sheet group includes multiple paths of annular elastic sheets, and the conductive sheet group includes multiple paths of conductive rings. There is a first indentation part between adjacent rings of the multiple paths of annular elastic sheets, and a second indentation part between adjacent rings of the multiple paths of conductive rings. Each path of the annular elastic sheet abuts against and is electrically connected to a corresponding path of the conductive ring. The first circuit board and the second circuit board are respectively provided with hollow parts at the positions corresponding to the first indentation part and the second indentation part. The first indentation part and the second indentation part are respectively formed by stamping a preset connection bar between adjacent rings.

2. The rotational electrical connection structure of a winding charger according to claim 1, wherein The distances between adjacent rings of the multiple paths of annular elastic sheets and the multiple paths of conductive rings are equal. The number of rings of the multiple paths of annular elastic sheets is the same as that of the multiple paths of conductive rings, and the ring diameters correspond to each other.

3. The rotatable electrical connection structure of a winding charger as described in claim 1, wherein The multiple paths of annular elastic sheets and the first indentation part are of an integrally formed structure. The multiple paths of conductive rings and the second indentation part are of an integrally formed structure. The multiple paths of annular elastic sheets and the first indentation part are made of the same material. The multiple paths of conductive rings and the second indentation part are made of the same material.

4. The rotational electrical connection structure of a winding charger as described in claim 1, characterized in that, 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 first circuit board and the second circuit board when the first indentation part and the second indentation part are punched off.

5. The rotational electrical connection structure of a winding charger according to claim 4, characterized in that The hollow part is a through hole penetrating the thickness of the first circuit board and the second circuit board, or a blind hole.

6. The rotational electrical connection structure of a winding charger according to claim 1, wherein The conductive elastic sheet group is welded or adhered to the first circuit board, and the conductive sheet group is welded or adhered to the second circuit board.

7. The rotatable electrical connection structure of a winding charger as described in claim 1, wherein, The multiple paths of annular elastic sheets are multiple paths of annular elastic sheets arranged in the order of concentric circles. The multiple paths of conductive rings are multiple paths of conductive rings arranged in the order of concentric circles. Each path of the annular elastic sheet 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 annular elastic sheets are correspondingly arranged along the radial direction.

8. The rotational electrical connection structure of a winding charger according to claim 7, characterized in that, Each path of the annular elastic sheet extends the elastic contact piece or contact in the direction towards a corresponding path of the conductive ring, and each path of the annular elastic sheet is electrically connected to a corresponding path of the conductive ring through the elastic contact piece or contact.

9. The rotational electrical connection structure of a winding charger according to claim 1, characterized in that, The thickness range of the conductive sheet group is above 0.1 millimeter, and both the conductive elastic sheet group and the conductive sheet group are made of copper material.

10. A winding charger, comprising a charging main body and a winding device disposed within the charging main body, characterized in that, The winding device includes the rotary electrical connection structure of the winding type charger as described in any one of claims 1 to 9.

Images