Winding stretching type vehicle-mounted charger

Abstract

The utility model relates to a winding stretching type vehicle-mounted charger, which comprises a vehicle charger shell, a main circuit board and a winding assembly, wherein the main circuit board and the winding assembly are arranged in the vehicle charger shell. A winding cavity and a vehicle charging cavity are formed in the upper portion of the shell, the main circuit board is installed in the winding cavity, an auxiliary circuit board is arranged in the vehicle charging cavity, the winding assembly comprises a winding shaft, a volute spiral spring, a stretching line and an electric connection assembly, and the winding shaft is arranged in a top inner cavity in the direction perpendicular to the height direction of the vehicle charging shell. The wire spool is provided with a first spool surface and a second spool surface which are opposite to each other, the first spool surface is provided with the electric connection assembly, the volute spiral spring is mounted on the winding shaft, a charging wire is correspondingly and electrically connected with the main circuit board through the electric connection assembly, the electric connection wire is in reliable contact, and the main circuit board is mounted in the winding cavity and is tightly connected with the winding assembly. The overall structure is compact, space is saved, and disassembly and assembly are convenient. In addition, the circuit wiring structure in the whole structure is well-organized, the use safety and reliability are improved, and the service life of the product is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle chargers, in particular to a winding and stretching type vehicle charger. Background Art

[0002] A car charger is a charger that is powered by a conventional car battery. It is usually inserted into the cigarette lighter hole and extends a charging port for the driver to charge. Therefore, the car charger draws power through the cigarette lighter port and converts it into a USB port for external output. When using it, we need to plug the car charger into the cigarette lighter port. However, the size of the cigarette lighter is fixed, and more and more electronic products such as mobile phones and tablets are being used. Some people not only have one mobile phone, but may have two mobile phones, and there are other passengers at the same time. Therefore, traditional car chargers are mainly convenient for the main driver or the co-driver.

[0003] In addition, although most car chargers currently have multiple charging ports, users still need to bring their own charging cables. As a result, car chargers with charging cables have emerged. At present, some car chargers also come with longer charging cables that can be stretched and retracted, that is, the car charger has a built-in cable winder, which will make the top of the entire car charger larger, giving a top-heavy visual experience, and the large size and space occupation bring certain inconveniences to use. Utility Model Content

[0004] In view of this, a wire winding stretching type vehicle charger is provided which has a compact structure, is easy to install, and is safe and reliable to use.

[0005] A wire-winding and stretching on-board charger, comprising a car charger shell, a main circuit board arranged in the car charger shell, and the wire-winding and stretching on-board charger also includes a winding assembly; the car charger shell includes an upper part and a lower part, the upper part of the car charger shell is provided with a winding cavity, and the lower part is provided with a car charger cavity; the main circuit board is installed in the winding cavity, and an auxiliary circuit board is arranged in the car charger cavity, and the main circuit board is electrically connected to the auxiliary circuit board; the winding assembly includes a winding shaft, a volute spring, a stretching wire, and an electrical connection assembly, and the winding assembly is accommodated in In the winding cavity, the winding shaft is arranged in the top inner cavity along the height direction perpendicular to the car charger shell, the winding shaft is arranged on the winding reel, the charging cable is arranged in the stretch cable and wound on the winding shaft, the winding reel has a first disk surface and a second disk surface relative to each other, the first disk surface of the winding reel is provided with the electrical connection component, and the charging cable is electrically connected to the main circuit board correspondingly through the electrical connection component, the first end of the stretch cable is provided with a charging interface, and the second end is connected to the winding shaft, and the spiral spring is installed on the winding shaft.

[0006] In some preferred embodiments, the electrical connection component includes multiple ring-shaped conductive springs and multiple turns of circuit lines, each of the conductive springs is electrically connected to the main circuit board separately, each turn of circuit lines is installed on the first disk surface, each turn of circuit lines is electrically contacted with one of the conductive springs, and each turn of circuit lines is electrically connected to the charging cable.

[0007] Furthermore, the multiple conductive springs are electrically connected to the main circuit board correspondingly, and the outer disk surface of the first disk surface is provided with an annular groove to set multiple circuit lines.

[0008] Furthermore, the winding assembly also includes a winding frame, which includes a winding bin and a winding cover. The winding reel is accommodated in the winding bin. The inner surface of the winding bin is provided with a plurality of annular grooves, and each annular groove is provided with a conductive spring.

[0009] In some specific embodiments, the winding shaft and the winding reel are an integral structure or are connected to form an integral whole, and the tension wire is accommodated between the first reel surface and the second reel surface when the tension wire is retracted.

[0010] In some specific embodiments, the main circuit board is annular, the winding bin is provided with a back cover on a side facing the main circuit board, a plurality of studs are provided around the back cover, the main circuit board is provided with a plurality of holes for corresponding connection with each stud, the size of the annular hole of the main circuit board is equal to or larger than the outer diameter of the back cover, the auxiliary circuit board includes a first auxiliary circuit board and a second auxiliary circuit board, the first auxiliary circuit board and the second auxiliary circuit board are arranged in parallel in the height direction of the car charger shell, and the first auxiliary circuit board and the second auxiliary circuit board are respectively provided with a plurality of components on two facing inner surfaces.

[0011] Preferably, a check key is provided on the inner side of the winding cover, one end of the check key is fixed to the winding cover, and the other end has a protrusion, the second disk surface is provided with a first ring guide groove and a second ring guide groove, the second ring guide groove is an inner ring groove, the first ring guide groove is an outer ring groove, the second ring guide groove is provided with at least two barbs to prevent the protrusion of the check key from retreating, and the barbs extend from the inner wall of the second ring guide groove close to the outer groove.

[0012] Furthermore, the shell includes a first shell and a second shell, the first shell and the second shell are connected into one by fasteners, the first shell and the second shell include a left shell, a right shell or an upper shell, a lower shell, the upper outer shell is a circular or partially circular shell, and the upper part is provided with an opening in the tangential direction for the stretch line to extend out.

[0013] Furthermore, the main circuit board and the auxiliary circuit board are connected as one or a whole circuit board, and the whole circuit board includes an upper plate and a lower plate, the upper plate is annular, and the lower plate is strip-shaped, and a sub-circuit board is erected on the main circuit board, and a charging interface or a data line interface is provided on the sub-circuit board, and the charging interface or the data line interface extends out of the upper part of the shell.

[0014] Preferably, the outer periphery of the winding bin is provided with a plurality of mounting hole columns, the car charger shell is provided with a plurality of fixing hole columns at corresponding positions, the plurality of mounting hole columns are correspondingly connected with the plurality of fixing hole columns through fasteners, the inner side wall of the car charger shell is provided with an axis hole seat, and the winding shaft is mounted on the axis hole seat.

[0015] In the above-mentioned winding stretching type on-board charger, the electrical connection component is arranged on the first disk surface of the winding disk, and the main circuit board is installed in the winding cavity and is closely connected with the winding component. The overall structure is more compact, which can reduce the volume of the car charger, save space, and is easy to assemble and disassemble. In addition, by positioning the electrical connection component on the disk surface or inside of the winding component, the electrical connection line has reliable contact and the line structure is well-organized, which improves the safety and reliability of use, and increases the service life of the product, and has a wide range of application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the three-dimensional structure of the wire-winding and stretching vehicle charger provided in Example 1 of the utility model.

[0017] Figure 2 for Figure 1 Schematic diagram of the three-dimensional exploded structure of the wire-wound stretching on-board charger.

[0018] Figure 3 for Figure 1 Another perspective diagram of the three-dimensional decomposition structure of the winding and stretching vehicle charger.

[0019] Figure 4 This is a schematic diagram of the three-dimensional structure of a wire-winding and stretching vehicle charger provided in Example 2 of the utility model.

[0020] In the figure: 100, on-board charger; 101, winding cavity; 102, car charger shell; 105, upper shell; 106, lower shell; 107, left shell; 108, right shell; 20, winding reel; 23, winding bin; 204, mounting hole column; 205, winding cover; 21, first disk surface; 22, second disk surface; 231, stud; 24, stretching wire; 241, charging interface; 25, winding rack; 26, winding shaft; 27, rear Cover; 28, scroll spring; 29, groove; 261, cut groove; 232, mounting ring; 304, fixing hole column; 31, first ring guide groove; 32, second ring guide groove; 33, barb; 35, main circuit board; 350, hole; 37, check key; 38, bump; 39, sub-circuit board; 40, car charger cavity; 41, first auxiliary circuit board; 42, second auxiliary circuit board; 51, conductive spring; 52, circuit line; 55, ring groove. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments; based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0022] See also Figures 1 to 4 , showing a winding and stretching type vehicle charger 100 provided in the first embodiment of the utility model, comprising a vehicle charger housing 102, a main circuit board 35 arranged in the vehicle charger housing 102, and a winding assembly. The vehicle charger housing 102 comprises an upper portion and a lower portion, wherein the upper portion of the vehicle charger housing 102 is provided with a winding cavity 101, and the lower portion is provided with a vehicle charger cavity 40; the main circuit board 35 is installed in the winding cavity 101, and an auxiliary circuit board is arranged in the vehicle charger cavity 40, and the main circuit board 35 is electrically connected to the auxiliary circuit board; the winding assembly comprises a winding shaft 26, a volute spring 28, a stretching wire 24, and an electrical connection assembly, and the winding assembly is accommodated in the winding cavity 101, and the winding shaft 26 is arranged along a height perpendicular to the vehicle charger housing 102 The direction is set in the top inner cavity, the winding shaft 26 is set on the winding reel 20, the tensile wire 24 is provided with a charging wire and is wound on the winding shaft 26, the winding reel 20 has a first disk surface 21 and a second disk surface 22 relative to each other, the first disk surface 21 of the winding reel 20 is provided with the electrical connection component, and the charging wire is electrically connected to the main circuit board 35 correspondingly through the electrical connection component, the first end of the tensile wire 24 is provided with a charging interface 241, and the second end is connected to the winding shaft 26, and the spiral spring 28 is installed on the winding shaft 26.

[0023] like Figure 2 and3 As shown, in some preferred embodiments, the electrical connection assembly includes multiple ring-shaped conductive springs 51 and circuit lines 52. Each of the conductive springs 51 is electrically connected to the main circuit board 35. Each circle of circuit lines 52 is installed on the first disk surface 21. Each circle of circuit lines 52 is electrically in contact with one of the conductive springs 51. Each circle of circuit lines 52 is electrically connected to the charging line. The number of multiple circuits corresponds to the number of circles, and corresponds to the number of pins required in the charging interface, that is, each circuit and each circle is electrically conductive to each corresponding wire in the stretching wire 24 and each pin in the charging interface. Such an electrical connection scheme of the ring-shaped conductive spring 51 and the ring-shaped circuit line 52 ensures that the two always maintain electrical contact during the rotating wire pulling process, and will not cause short circuits or open circuits, thereby improving the safety and reliability of the circuit.

[0024] Furthermore, the conductive springs 51 of multiple paths are electrically connected to the main circuit board 35, and the outer disk surface of the first disk surface 21 is provided with an annular groove 29 to set the circuit line 52. Each annular conductive spring 51 is a whole ring, and the annular conductive spring 51 is provided with an elastic flap 511. The annular conductive spring 51 is metal, preferably a copper sheet, and the elastic flap 511 is preferably stamped. The elastic flap 511 has a certain curvature, and the curved part protrudes from the annular surface of the annular conductive spring 51 so as to be electrically connected to the circuit line 52. The circuit line 52 maintains electrical contact with the elastic flap 511 through its own loop. The charging line in the stretch line 24 is actually a harness including several wires, and each circle of the circuit line 52 has an end that is separately connected to each wire in the charging line harness in the stretch line 24.

[0025] Furthermore, the winding assembly further comprises a winding frame 25, the winding frame 25 comprises a winding bin 23 and a winding cover 205, the winding reel 20 is accommodated in the winding bin 23, the inner surface of the winding bin 23 is provided with a plurality of annular grooves 55, and each annular groove 55 is provided with a conductive spring 51. Figure 2 As shown, the winding bin 23 is provided with a plurality of wire holes for connecting the conductive springs 51 to the main circuit board 35 at the rear of the winding bin 23. The winding cover 205 can be used as the outer cover of the upper shell, or it can be covered with a label layer with a logo printed in the middle.

[0026] Preferably, the outer periphery of the winding bin 23 is provided with a plurality of mounting hole columns 204, and the car charger shell 102 is provided with a plurality of fixing hole columns 304 at corresponding positions. The plurality of mounting hole columns 204 and the plurality of fixing hole columns 304 are correspondingly connected through fasteners, and the inner side wall of the car charger shell 102 is provided with an axis hole seat 306, and the winding shaft 26 is installed on the axis hole seat 306.

[0027] In some specific embodiments, the main circuit board 35 is annular, the winding bin 23 is provided with a rear cover 27 on the side facing the main circuit board 35, and a plurality of studs 231 are provided around the rear cover 27, and the main circuit board 35 is provided with a plurality of holes 350 for corresponding connection with each stud 231 through fasteners. Preferably, the size of the annular hole of the main circuit board 35 is equal to or greater than the outer diameter of the rear cover 27. Specifically, the auxiliary circuit board includes a first auxiliary circuit board 41 and a second auxiliary circuit board 42, the first auxiliary circuit board 41 and the second auxiliary circuit board 42 are arranged in parallel in the height direction of the car charger shell 102, and the first auxiliary circuit board 41 and the second auxiliary circuit board 42 are respectively provided with a plurality of components on the two facing inner surfaces. A sub-circuit board 39 is erected on the main circuit board 35, and a charging interface or a data line interface is provided on the sub-circuit board 39, and the charging interface or the data line interface extends out of the upper part of the shell.

[0028] In some specific embodiments, the winding shaft 26 and the winding disk 20 are an integrated structure or connected to form an integral body, and the tension wire 24 is accommodated between the first disk surface 21 and the second disk surface 22 when retracted. A slot 261 is provided at one end of the winding shaft 26, and one end of the spiral spring 28 is buckled into the slot 261, and the other end is fixed to the winding bin 23. Specifically, the winding bin 23 is provided with a mounting ring 232 on a side facing the main circuit board 35, and the rear cover 27 is assembled on the mounting ring 232 and covers the spiral spring 28.

[0029] Preferably, a check key 37 is provided on the inner side of the winding cover 205, one end of the check key 37 is fixed to the winding cover 205, and the other end has a convex point 38, the second disk surface 22 is provided with a first ring guide groove 31 and a second ring guide groove 32, the second ring guide groove 32 is an inner ring groove, the first ring guide groove 31 is an outer ring groove, the second ring guide groove 32 is provided with at least two barbs 33 to prevent the convex point 38 of the check key 37 from retreating, and the barbs 33 extend from the outer groove inner wall of the second ring guide groove 32. Preferably, the barbs 33 are arc-shaped and obliquely placed in the gap between the first ring guide groove 31 and the second ring guide groove 32, the oblique barbs 33 have an arched back surface and a sharp hook surface, the arched back surface extends from the first ring guide groove 31 to the second ring guide groove 32 in a clockwise direction, the sharp hook surface faces the groove wall between the first ring guide groove 31 and the second ring guide groove 32, and the sharp hook surface has barbs. When the line is pulled, the protrusion 38 remains active along the one-ring guide groove 31 of the outer ring. The protrusion 38 itself does not move. Due to the rotation of the winding drum 22, the one-ring guide groove 31 of the outer ring rotates. When the line is continuously stretched, the one-ring guide groove 31 allows the protrusion 38 to move therein. In terms of relative movement, the protrusion 38 is equivalent to sliding along the one-ring guide groove 31. Since the line is pulled out in a clockwise direction, the back side of the bow of the inverted hook 33 will not prevent the protrusion 38 but will allow the protrusion 38 to slide smoothly. However, when it is necessary to retract, as long as the first ring guide groove 31 is reversed to contact the barb 33, the oblique part of the barb 33 will block the protrusion 38, so that it will not retract quickly. If the line is pulled forcibly, the protrusion 38 will slide into the second ring guide groove 32, and then will come out from the gap between the first ring guide groove 31 and the second ring guide groove 32 so as to retract a certain length. Such a cycle can make it possible to pull the line out smoothly, because the barb 33 will not give resistance to the protrusion 38. When retracting, the barb 33 will give resistance to the protrusion 38 and can retract a certain stroke, but the retraction has a certain resistance, and the barb 33 plays a certain role in reversing.

[0030] In addition, specifically, the car charger housing 102 includes a first housing and a second housing, the first housing and the second housing are connected to form a whole through a fastener, and the first housing and the second housing include a left housing, a right housing, or an upper housing and a lower housing. Figure 1-3 In the illustrated embodiment 1, the first shell and the second shell include an upper shell 105 and a lower shell 106 .

[0031] like Figure 4As shown, in another embodiment 2, the first shell and the second shell include a left shell 107 and a right shell 108, and the left shell 107 and the right shell 108 are snap-fitted to each other, so that they can be quickly disassembled and assembled. Furthermore, the main circuit board 35 and the auxiliary circuit board 43 in the second embodiment are connected as a whole, which is equivalent to a whole circuit board, thus saving installation time and making installation more convenient. In addition, the circuit board manufacturing molding direction effectively reduces costs. The other structures are basically similar, and the second embodiment will not be repeated.

[0032] In various embodiments, the upper shell is a circular or partially circular shell, and the upper part is provided with an opening in the tangential direction for the extension of the stretching wire 24. As described above, the main circuit board 35 and the auxiliary circuit board are connected as one or a whole circuit board. Figure 4 The example in the figure is a whole circuit board, including an upper board and a lower board, wherein the upper board is ring-shaped and the lower board is strip-shaped.

[0033] In the above-mentioned winding stretching vehicle charger 100, the electrical connection component is arranged on the first disk surface 21 of the winding disk 20, and the main circuit board 35 is installed in the winding cavity 101, and is closely connected with the winding component. The overall structure is more compact, which can reduce the volume of the vehicle charger, save space, and is easy to assemble and disassemble. In addition, by positioning the electrical connection component on the disk surface 21 or inside of the winding component, the electrical connection line is reliably in contact, and the line structure is clearly organized, which improves the safety and reliability of use, and increases the service life of the product, and has a wide range of application prospects.

[0034] 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 may also make other changes. These changes made according to the creative spirit of the present invention should be included in the scope of protection required by the present invention.

Claims

1. A wire-winding and stretching vehicle charger, comprising a vehicle charger housing and a main circuit board arranged in the vehicle charger housing, characterized in that: The wire winding and stretching type on-board charger also includes a wire winding assembly; The car charger housing comprises an upper part and a lower part, wherein the upper part of the car charger housing is provided with a winding cavity, and the lower part is provided with a car charger cavity; The main circuit board is installed in the winding cavity, and an auxiliary circuit board is arranged in the vehicle charger cavity, and the main circuit board is electrically connected to the auxiliary circuit board; The winding assembly includes a winding shaft, a spiral spring, a stretch wire, and an electrical connection assembly. The winding assembly is accommodated in the winding cavity. The winding shaft is arranged in the top inner cavity along a height direction perpendicular to the car charger shell. The winding shaft is arranged on a winding reel. A charging wire is arranged in the stretch wire and is wound on the winding shaft. The winding reel has a first disk surface and a second disk surface relative to each other. The first disk surface of the winding reel is provided with the electrical connection assembly, and the charging wire is electrically connected to the main circuit board correspondingly through the electrical connection assembly. The first end of the stretch wire is provided with a charging interface, and the second end is connected to the winding shaft. The spiral spring is installed on the winding shaft.

2. The wire-winding stretching vehicle charger according to claim 1, characterized in that: The electrical connection component includes multiple ring-shaped conductive springs and multiple circuit lines. Each of the conductive springs is electrically connected to the main circuit board separately. Each circuit line is installed on the first disk surface. Each circuit line is electrically contacted with one of the conductive springs. Each circuit line is electrically connected to the charging cable.

3. The wire-winding stretching vehicle charger according to claim 2, characterized in that: The conductive springs are electrically connected to the main circuit board in multiple ways, and the outer disk surface of the first disk surface is provided with an annular groove to set multiple circuit lines.

4. The wire-winding stretching vehicle charger according to claim 2, characterized in that: The winding assembly also includes a winding frame, which includes a winding bin and a winding cover. The winding reel is accommodated in the winding bin. The inner surface of the winding bin is provided with a plurality of annular grooves, and each annular groove is provided with a conductive spring.

5. The wire-winding stretching vehicle charger according to claim 1, characterized in that: The winding shaft and the winding disk are of an integrated structure or are connected as one body, and the stretch wire is accommodated between the first disk surface and the second disk surface when retracted.

6. The wire-winding stretching vehicle charger according to claim 4, characterized in that: The main circuit board is annular, and the winding bin is provided with a rear cover on a side facing the main circuit board, and a plurality of studs are provided around the rear cover. The main circuit board is provided with a plurality of holes for corresponding connection with each stud, and the size of the annular hole of the main circuit board is equal to or larger than the outer diameter of the rear cover. The auxiliary circuit board includes a first auxiliary circuit board and a second auxiliary circuit board, and the first auxiliary circuit board and the second auxiliary circuit board are arranged in parallel in the height direction of the car charger shell, and the first auxiliary circuit board and the second auxiliary circuit board are respectively provided with a plurality of components on two facing inner surfaces.

7. The wire-winding stretching vehicle charger according to claim 4, characterized in that: A check key is provided on the inner side of the winding cover, one end of the check key is fixed to the winding cover, and the other end has a convex point, the second disk surface is provided with a first ring guide groove and a second ring guide groove, the second ring guide groove is an inner ring groove, the first ring guide groove is an outer ring groove, the second ring guide groove is provided with at least two barbs to prevent the convex point of the check key from retreating, and the barbs extend from the inner wall of the second ring guide groove close to the outer groove.

8. The wire-winding stretching vehicle charger according to claim 1, characterized in that: The shell includes a first shell and a second shell, the first shell and the second shell are connected into one by fasteners, the first shell and the second shell include a left shell, a right shell or an upper shell and a lower shell, the upper outer shell is a circular or partially circular shell, and the upper part is provided with an opening in the tangential direction for the stretch line to extend out.

9. The wire-winding stretching vehicle charger according to claim 1, characterized in that: The main circuit board and the auxiliary circuit board are connected as one body or are a whole circuit board. The whole circuit board includes an upper plate and a lower plate. The upper plate is ring-shaped and the lower plate is strip-shaped. A sub-circuit board is erected on the main circuit board. The sub-circuit board is provided with a charging interface or a data line interface. The charging interface or the data line interface extends out of the upper part of the shell.

10. The wire-winding stretching vehicle charger according to claim 4, characterized in that: The outer periphery of the winding bin is provided with a plurality of mounting hole columns, and the car charger shell is provided with a plurality of fixing hole columns at corresponding positions. The plurality of mounting hole columns are correspondingly connected with the plurality of fixing hole columns through fasteners, and the inner side wall of the car charger shell is provided with an axis hole seat, and the winding shaft is installed on the axis hole seat.

Images