Magnetic core winding antenna structure suitable for SMT assembly

Abstract

The invention provides a magnetic core winding antenna structure suitable for SMT (Surface Mount Technology) assembly, which reduces the volume of an antenna module, enables the antenna module to be subjected to surface mounting operation in an SMT form, and enables the connection of the antenna module to be quick and efficient. The plastic seat comprises a mounting cavity and a welding support plate, and the non-welding surface of the welding support plate is provided with a raised mounting cavity; a magnetic core including a winding shaft; a winding coil; a red copper sheet assembly; and a mylar film; the winding coil is wound around the winding shaft, the two ends of the winding coil are arranged in an outward protruding mode to form connecting parts, the bottom of the magnetic core and the bottom of the winding coil are arranged in an installation cavity of the plastic base, and a red copper sheet assembly is arranged in a supporting plate at the bottom of the plastic base in advance. The connecting parts of the red copper sheet and the winding coil are combined to form corresponding welding spots exposed out of the bottom of the welding support plate; the inner surfaces of the two ends of the mylar in the length direction are connected with the upper surface of the integral structure formed by the magnetic core and the winding coil in an attached mode.

Description

Technical Field

[0001] The present invention relates to the technical field of antenna assembly, and specifically to a magnetic core winding antenna structure suitable for SMT assembly. Background Art

[0002] When an electronic device is assembled, an antenna module needs to be assembled onto a circuit board. In the prior art, it is generally necessary to manually arrange the wires of the antenna and then weld the corresponding wires to the circuit board. During actual assembly, the assembly of the antenna module is time-consuming and laborious, and the structure space of such an antenna that requires wire arrangement is large, occupying a large amount of space of the electronic device, thereby hindering the miniaturization process of the electronic device; for this reason, there is an urgent need to develop an antenna structure that can match the miniaturization of the electronic device and enable the antenna module to be connected quickly and efficiently. Summary of the Invention

[0003] In view of the above problems, the present invention provides a magnetic core winding antenna structure suitable for SMT assembly, which reduces the volume of the antenna module and enables the antenna module to be mounted through SMT, making the connection of the antenna module quick and efficient.

[0004] A magnetic core winding antenna structure suitable for SMT assembly, characterized in that it includes:

[0005] A plastic base, which includes an installation cavity and a welding support plate, and a raised installation cavity is provided on the non-welding surface of the welding support plate;

[0006] A magnetic core, which includes a winding shaft;

[0007] A winding coil;

[0008] A copper sheet assembly;

[0009] And a mylar sheet;

[0010] The winding coil is wound around the winding shaft, and two ends thereof are respectively convexly provided to form connection parts. The bottom of the magnetic core and the winding coil is placed in the installation cavity of the plastic base. A copper sheet assembly is preset in the bottom support plate of the plastic base. The connection parts of the copper sheet and the winding coil form corresponding solder joints exposed at the bottom of the welding support plate;

[0011] The inner surfaces of both ends in the length direction of the mylar sheet are respectively adhesively connected to the upper surface of the overall structure formed by the magnetic core and the winding coil. The outer surface of the mylar sheet is used for the adsorption operation of the entire antenna module during SMT assembly.

[0012] It is further characterized in that:

[0013] Stop blocks are provided at both ends of the magnetic core in the length direction. The stop blocks protrude outward relative to the winding shaft, so that the winding coil body does not protrude beyond the outer surface of the stop blocks;

[0014] The inner surfaces at both ends of the Mylar sheet in the length direction are respectively bonded and connected to the upper surfaces of the stop blocks through a glue structure;

[0015] When the copper sheet assembly only includes the middle copper sheet, the middle copper sheet is embedded in the welding support plate. A raised portion is formed in the middle of the length direction of the middle copper sheet, and the raised portion is exposed on the welding surface of the welding support plate. Winding coils for welding are respectively sleeved at both ends of the welding support plate in the length direction, and corresponding solder joint areas are formed at the areas of the winding coils for welding corresponding to the welding surface;

[0016] The welding support plate is provided with winding notches at the positions corresponding to the winding coils for welding to ensure the stable and reliable setting of the winding coils for welding;

[0017] When the copper sheet assembly includes a middle copper sheet and welding copper sheets at both ends, the middle copper sheet is embedded in the welding support plate. A raised portion is formed in the middle of the length direction of the middle copper sheet, and the raised portion is exposed on the welding surface of the welding support plate. The welding copper sheets at both ends are embedded at the ends of the welding support plate in the length direction, and the welding positions of the welding copper sheets are exposed on the welding surface of the welding support plate. The outwardly protruding wire bodies at both ends of the winding coil in the length direction respectively protrude from the corresponding ends of the outer mounting cavity and are welded to the welding copper sheets at the corresponding ends;

[0018] When the welding copper sheet is only a flat plate structure, the outwardly protruding wire body includes an outwardly protruding connecting wire, a bending transition wire, a first horizontal pressing wire, a bending turning wire, and a second horizontal pressing wire. Wire body positioning grooves are respectively provided on the two surfaces at both ends of the welding support plate in the length direction. The first horizontal pressing wire and the second horizontal pressing wire are respectively embedded in the corresponding wire body positioning grooves and are welded to the corresponding surfaces of the flat plate structure welding copper sheet;

[0019] Preferably, an inwardly concave guiding groove is provided at the position of the welding copper sheet corresponding to the welding surface, and the corresponding second horizontal pressing wire is embedded in the inwardly concave guiding groove and welded to the welding copper sheet to ensure accurate and convenient positioning;

[0020] When the welding copper sheet includes a flat plate structure and a folded edge structure, the corresponding ends of the outwardly protruding wire body are welded to the corresponding folded edge structures;

[0021] The installation cavity includes two protruding side plates and corresponding end plate structures. The middle and lower sections of the stoppers at both ends of the magnetic core in the length direction are fitted and embedded in the installation cavity formed by the side plates and the end plate structures to ensure the reliable and stable installation of the magnetic core and the winding coil.

[0022] After adopting the structure of the present invention, such an antenna structure is applicable to WPC antennas, RFID antennas or similar antennas. The antenna with a conventional magnetic core winding is combined with a plastic part with an in-mold injection copper sheet assembly. The corresponding solder joints exposed at the bottom of the welding support plate are formed by combining the connecting parts of the copper sheet and the winding coil, and a mylar sheet is provided for SMT transfer operation, so that the entire antenna module is mounted in the form of SMT, thereby saving the antenna structure space, reducing the working hours of traditional manual wire arrangement and manual welding, improving the consistency of quality, increasing the production efficiency, and achieving the purpose of high yield. Description of the Drawings

[0023] Figure 1 It is the front view of the first specific embodiment of the present invention;

[0024] Figure 2 It is the bottom view of the first specific embodiment of the present invention;

[0025] Figure 3 It is the three-dimensional exploded view of the first specific embodiment of the present invention;

[0026] Figure 4 It is the front view of the second specific embodiment of the present invention;

[0027] Figure 5 It is the bottom view of the second specific embodiment of the present invention;

[0028] Figure 6 It is the three-dimensional exploded view of the second specific embodiment of the present invention;

[0029] Figure 7 It is the front view of the third specific embodiment of the present invention;

[0030] Figure 8 It is the bottom view of the third specific embodiment of the present invention;

[0031] Figure 9 It is the three-dimensional exploded view of the third specific embodiment of the present invention;

[0032] The names corresponding to the serial numbers in the figure are as follows:

[0033] Middle solder joint area 1, side solder joint area 2;

[0034] Plastic base 10, installation cavity 11, side plate 111, end plate structure 112, welding support plate 12, wire winding notch 121, wire body positioning groove 122, magnetic core 20, wire winding reel 21, stop block 22, wire winding coil 30, coil body 31, connecting part 32, wire winding coil for welding 321, outward protruding connecting wire 322, bending transition wire 323, first horizontal pressing wire 324, bending turning wire 325, second horizontal pressing wire 326, copper sheet assembly 40, middle copper sheet 41, protruding part 411, copper sheet for welding 42, concave guiding groove 421, flanging structure 43, mylar sheet 50. Detailed implementation method

[0035] A magnetic core wire-wound antenna structure suitable for SMT assembly, see Figures 1 - 9 , which includes a plastic base 10, a magnetic core 20, a wire winding coil 30, a copper sheet assembly 40, and a mylar sheet 50;

[0036] The plastic base 10 includes an installation cavity 11 and a welding support plate 12. An upwardly protruding installation cavity 11 is provided on the non-welding surface of the welding support plate 12;

[0037] The magnetic core 20 includes a wire winding reel 21 located in the middle of the length direction;

[0038] After the coil body 31 of the wire winding coil 30 is wound around the wire winding reel 21, the two ends respectively protrude outward to form a connecting part 32. The bottom of the magnetic core 20 and the wire winding coil 30 are placed in the installation cavity 11 of the plastic base 10. A copper sheet assembly 40 is preset in the bottom support plate 12 of the plastic base 10. The copper sheet assembly 40 and the connecting part 32 of the wire winding coil 30 are combined to form corresponding solder joints exposed at the bottom of the welding support plate;

[0039] The inner surfaces at both ends in the length direction of the mylar sheet 50 are respectively attached and connected to the upper surface of the overall structure formed by the magnetic core 20 and the wire winding coil 30. The outer surface of the mylar sheet 50 is used for the adsorption operation of the entire antenna module during SMT assembly.

[0040] During specific implementation: Stop blocks 22 are provided at both ends in the length direction of the magnetic core 20. The stop blocks 22 protrude outward relative to the wire winding reel 21, so that the coil body 31 is not set to protrude beyond the outer surface of the stop blocks 22;

[0041] The inner surfaces at both ends in the length direction of the mylar sheet 50 are respectively attached and connected to the upper surface of the stop blocks 22 through a glue structure.

[0042] During specific implementation: The installation cavity 11 includes two protruding side plates 111 and corresponding end plate structures 112. The middle and lower sections of the stop blocks 22 at both ends in the length direction of the magnetic core 20 are adaptively fitted and embedded in the installation cavity 11 formed by the side plates 111 and the end plate structures 112 to ensure the reliable and stable installation of the magnetic core 20 and the wire winding coil 30.

[0043] Specific Embodiment 1, see Figures 1 - 3 : When the copper sheet assembly 40 only includes the middle copper sheet 41, the middle copper sheet 41 is embedded in the welding support plate 12. A convex portion 411 is formed in the middle of the length direction of the middle copper sheet 41. The convex portion 411 is exposed on the welding surface of the welding support plate 12 to form the middle solder joint area 1. Welding winding coils 321 for welding are respectively sleeved at both ends of the length direction of the welding support plate 12. The welding winding coils 321 form corresponding two-side solder joint areas 2 at the area positions corresponding to the welding surface;

[0044] The welding support plate 12 is provided with winding notches 121 at positions corresponding to the welding winding coils 321 to ensure the stable and reliable setting of the welding winding coils 321.

[0045] Specific Embodiments 2 and 3, see Figures 4 - 9 : When the copper sheet assembly 40 includes the middle copper sheet 41 and the welding copper sheets 42 at both ends, the middle copper sheet 41 is embedded in the welding support plate 12. A convex portion 411 is formed in the middle of the length direction of the middle copper sheet 41. The convex portion 411 is exposed on the welding surface of the welding support plate 12 to form the middle solder joint area 1. The welding copper sheets 42 at both ends are embedded at the ends of the length direction of the welding support plate 12. The welding positions of the welding copper sheets 42 are exposed on the welding surface of the welding support plate 11 to form corresponding two-side solder joint areas 2. The outer convex wire bodies at both ends of the length direction of the winding coil 30 are respectively externally convexly installed at the corresponding ends of the installation cavity 11 and are welded to the welding copper sheets 42 at the corresponding ends.

[0046] Specific Embodiment 2, see Figures 4 - 6 : When the welding copper sheet 42 is only a flat plate structure, the outer convex wire body includes an outer convex connecting wire 322, a bending transition wire 323, a first horizontal pressing wire 324, a bending steering wire 325, and a second horizontal pressing wire 326. Wire body positioning grooves 122 are respectively arranged on both surfaces at both ends of the length direction of the welding support plate 12. The first horizontal pressing wire 324 and the second horizontal pressing wire 326 are respectively embedded in the corresponding wire body positioning grooves 122 and are welded to the corresponding surfaces of the flat plate structure of the welding copper sheet 42;

[0047] The welding copper sheet 42 is provided with an inner concave guiding groove 421 at the position corresponding to the welding surface. The corresponding second horizontal pressing wire 326 is embedded in the inner concave guiding groove 421 and is welded to the welding copper sheet 42 to ensure accurate and convenient positioning.

[0048] Specific Embodiment 3, see Figures 7 - 9 : When the welding copper sheet 42 includes a flat plate structure and a flanging structure 43, the corresponding ends of the outer convex wire body are welded to the corresponding flanging structures 43.

[0049] In specific implementation, the positions of the mylar sheet 50 and the plastic base 10 can be a structure with the upper and lower positions swapped, or a structure arranged left and right. Just assemble them according to actual requirements.

[0050] The principle is as follows: This kind of antenna structure is applicable to WPC antennas, RFID antennas or similar antennas. It combines the antenna with a conventional magnetic core winding and an injection-molded copper sheet component in a plastic part. Through the connection part between the copper sheet and the winding coil, corresponding solder joints exposed at the bottom of the welding support plate are formed. And a mylar sheet is set for SMT transfer operation, so that the whole antenna module is mounted in the form of SMT, thus saving the antenna structure space, reducing the working hours of traditional manual wire arrangement and manual welding, improving the consistency of quality, enhancing the production efficiency, and achieving the purpose of high yield.

[0051] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0052] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A magnetic core winding antenna structure suitable for SMT assembly, characterized in that: It includes: A plastic seat, comprising a mounting cavity and a welding support plate, wherein a protruding mounting cavity is provided on a non-welding surface of the welding support plate; a magnetic core including a winding bobbin; Winding coils; Copper sheet components; and Mylar tablets; After the winding coil is wound on the winding shaft, the two ends are respectively convexly arranged to form a connecting part, the bottom of the magnetic core and the winding coil are placed in the installation cavity of the plastic seat, and a copper sheet assembly is preset in the bottom support plate of the plastic seat, and the connecting part of the copper sheet and the winding coil is combined to form a corresponding welding point exposed at the bottom of the welding support plate; The inner surfaces of both ends of the Mylar sheet in the length direction are respectively attached to the upper surface of the integral structure formed by connecting the magnetic core and the winding coil, and the outer surface of the Mylar sheet is used for the adsorption operation of the entire antenna module during SMT assembly.

2. A magnetic core winding antenna structure suitable for SMT assembly according to claim 1, characterized in that: Stop blocks are arranged at both ends of the magnetic core in the length direction, and the stop blocks are arranged to protrude outwardly relative to the winding shaft.

3. The magnetic core winding antenna structure suitable for SMT assembly according to claim 2, characterized in that: The inner surfaces of the two ends of the Mylar sheet in the length direction are respectively connected to the upper surface of the stop block through a glue structure.

4. The magnetic core winding antenna structure suitable for SMT assembly according to claim 1, characterized in that: When the copper sheet assembly only includes an intermediate copper sheet, the intermediate copper sheet is pre-buried in the welding support plate, a convex portion is formed in the middle of the intermediate copper sheet in the length direction, the convex portion is exposed on the welding surface of the welding support plate, and welding winding coils are respectively provided at both ends in the length direction of the welding support plate, and the welding winding coils form corresponding welding point areas corresponding to the surface area positions of the welding surface.

5. The magnetic core winding antenna structure suitable for SMT assembly according to claim 4, characterized in that: The welding support plate is provided with a winding notch at a position corresponding to the welding winding coil.

6. The magnetic core winding antenna structure suitable for SMT assembly according to claim 1, characterized in that: When the copper sheet assembly includes a middle copper sheet and welding copper sheets at both ends, the middle copper sheet is pre-buried in the welding support plate, a convex portion is formed in the middle of the middle copper sheet in the length direction, and the convex portion is exposed on the welding surface of the welding support plate, and the welding copper sheets at both ends are pre-buried in the end portions in the length direction of the welding support plate, and the welding positions of the welding copper sheets are exposed on the welding surface of the welding support plate, and the outer convex wire bodies at both ends in the length direction of the winding coil respectively convexly protrude from the corresponding ends of the mounting cavity, and are welded to the welding copper sheets at the corresponding ends.

7. The magnetic core winding antenna structure suitable for SMT assembly according to claim 6, characterized in that: When the welding copper sheet is only a flat plate structure, the outer convex wire body includes an outer convex connecting line, a bending transition line, a first horizontal pressing line, a bending turning line, and a second horizontal pressing line. The two surfaces at both ends of the welding support plate in the length direction are respectively provided with wire body positioning grooves. The first horizontal pressing line and the second horizontal pressing line are respectively embedded in the corresponding wire body positioning grooves and welded to the corresponding surfaces of the welding copper sheet with a flat plate structure.

8. The magnetic core winding antenna structure suitable for SMT assembly according to claim 7, characterized in that: The welding copper sheet is provided with an inwardly concave guide groove at a position corresponding to the welding surface, and the corresponding second horizontal pressing line is embedded in the inwardly concave guide groove and welded to the welding copper sheet.

9. The magnetic core winding antenna structure suitable for SMT assembly according to claim 6, characterized in that: When the welding copper sheet comprises a flat plate structure and a folded edge structure, the corresponding ends of the outer convex line bodies are welded and connected to the corresponding folded edge structures.

10. The magnetic core winding antenna structure suitable for SMT assembly according to claim 1, characterized in that: The installation cavity includes two raised side plates and a corresponding end plate structure, and the middle and lower sections of the stop blocks at both ends of the magnetic core in the length direction are adapted to fit and embed in the installation cavity formed by the side plates and the end plate structure.

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