A wireless charging coil manufacturing apparatus

Abstract

The application provides a wireless charging coil manufacturing device, and relates to the technical field of wireless charging coil manufacturing.The device comprises a coil fastening table, a center guide opening is arranged in the center of the coil fastening table, a coil center protruding column is movably connected in the center guide opening, a locking driving element is fixedly connected to the inside of the coil fastening table, a shrinkage linkage rotary disc is fixedly connected to the upper end of the rotating shaft of the locking driving element, the upper part of the coil is covered and fixed by a limiting pressing plate, the coil is further tightened when the wires at both ends of the coil are pulled, and the coil is prevented from scattering and separating during the tightening process due to the multidirectional limiting effect; the coil is quickly and stably fastened and limited, the problem that some coils are deformed after winding due to the elasticity of the wires, the coils are loose and not firm, and the coils are easily scattered and separated during the tightening process and are damaged if the coils lack shape fixation when the coils are pulled is solved.

Description

Technical Field

[0001] This invention relates to the field of wireless charging coil manufacturing technology, and more particularly to a wireless charging coil manufacturing apparatus. Background Technology

[0002] Wireless charging technology is mainly based on the principle of electromagnetic induction, which uses an alternating magnetic field to transfer energy between the transmitting coil and the receiving coil. When an alternating current passes through the transmitting coil, it generates an alternating magnetic field. This magnetic field passes through the receiving coil and induces an alternating electromotive force in the receiving coil, thereby charging the receiving device. Therefore, the coil is an important component in wireless charging devices. It is itself an inductor and uses the characteristics of inductance to store and transfer magnetic energy. The manufacturing process of the coil includes winding, fastening the coil, and attaching a magnetic shielding sheet. The magnetic shielding sheet has the function of blocking or guiding the magnetic field through a high magnetic permeability material.

[0003] In the traditional manufacturing process of wireless charging coils, after the coil is wound, tape is used to bind it to improve the coil's winding firmness before attaching a magnetic shielding sheet. However, after some coils are wound, the elasticity of the wires themselves can cause deformation, resulting in loose and unstable coils. It is necessary to further tighten the coil and shape it. If the coil lacks a fixed shape when tightening, the wires are prone to scattering and separating, leading to coil damage. Summary of the Invention

[0004] This invention discloses a wireless charging coil manufacturing device to solve the problem that after some coils are wound, the elasticity of the wires themselves will cause deformation after winding, resulting in loose and unstable coils. It is necessary to further tighten the coils to fix their shape. When tightening the coils, if the coils lack shape fixation, the wires are prone to fall off and separate during the tightening process, which can lead to coil damage.

[0005] In a first aspect, this disclosure provides a wireless charging coil manufacturing apparatus, specifically comprising: a coil fastening platform, wherein a central guide opening is provided at the center of the coil fastening platform, a coil central protrusion is movably connected inside the central guide opening, a locking drive component is fixedly connected inside the coil fastening platform, a tightening linkage rotary disk is fixedly connected to the upper end of the rotating shaft of the locking drive component, eight rotary disk connecting rods are hinged to the upper surface of the tightening linkage rotary disk, the tightening linkage rotary disk is coaxial with the coil fastening platform, and eight planar guide grooves are provided on the upper surface of the coil fastening platform, the eight planar guide grooves being radially and evenly distributed from the center of the upper surface of the coil fastening platform. Eight sliding locking plates are movably connected above the coil fastening platform. Locking plate sliders are fixedly connected below the sliding locking plates. The locking plate sliders are slidably connected to the planar guide grooves. A limiting pressure plate is fixedly connected to one end of the sliding locking plate facing the center of the coil fastening platform. The limiting pressure plate is parallel to the upper surface of the coil fastening platform. A locking plate push shaft is vertically welded below the locking plate slider. The eight locking plate push shafts are respectively rotatably connected to the outer ends of eight rotating disc connecting rods. A protruding column pull plate is fixedly connected to the lower end of the central protruding column of the coil. The protruding column pull plate is located inside the coil fastening platform. A protruding column tension spring is fixedly connected between the upper surface of the protruding column pull plate and the upper wall inside the coil fastening platform.

[0006] Furthermore, a pressure-cap type dispensing machine is hinged to the upper left side of the coil fastening platform. Eight dispensing nozzles are fixedly connected to the lower surface of the pressure-cap type dispensing machine, and the eight dispensing nozzles are evenly distributed radially around the center of the pressure-cap type dispensing machine.

[0007] Furthermore, the upper surface of the capping dispensing machine is fixedly connected to a flow distribution chamber, and eight adhesive flow distribution pipes are fixedly connected to the side of the flow distribution chamber.

[0008] Furthermore, the output end of the glue pump is connected to the top of the flow distribution chamber via a pipe, and the glue nozzle is connected to the flow distribution chamber via a glue distribution pipe.

[0009] Furthermore, when the pressure-type dispensing machine covers the coil fastening platform, the eight dispensing nozzles and the eight sliding locking plates are staggered.

[0010] Furthermore, a pressure plate connecting rod is fixedly connected to the lower end of the magnetic shielding sheet pressure frame, and a magnetic shielding sheet pressure plate is fixedly connected to the lower end of the pressure plate connecting rod. The pressure plate connecting rod is perpendicular to the magnetic shielding sheet pressure plate.

[0011] Furthermore, the pressure plate connecting rod is coaxial with the magnetic shielding plate, and the magnetic shielding plate has eight strip-shaped pressure plate through-holes running longitudinally through it.

[0012] Furthermore, when the magnetic shielding sheet pressure frame covers the coil fastening platform, the eight pressure plate openings and eight sliding locking plates are staggered, and a pre-compression tension spring is fixedly connected above the magnetic shielding sheet pressure plate.

[0013] Furthermore, the pre-pressure plate is slidably connected to the pressure plate connecting rod, the pre-pressure plate and the pressure plate connecting rod are coaxial, and the pre-pressure plate is fixedly connected to eight pre-pressure top rods. The eight pre-pressure top rods are radially distributed on the lower surface of the pre-pressure plate with the axis of the pre-pressure plate as the center, and the eight pre-pressure top rods are slidably connected to eight pressure plate through holes respectively.

[0014] Furthermore, the lower surface of the pre-compression plate is fixedly connected to the upper end of the pre-compression spring. Under normal conditions, the pre-compression plate is close to the magnetic shielding plate under the tension of the pre-compression spring, and the lower end of the pre-compression top rod is located below the magnetic shielding plate.

[0015] This invention provides a wireless charging coil manufacturing apparatus, which has the following beneficial effects: The wireless charging coil manufacturing device of this invention is used to repeatedly tension coils that are loose, poorly wound, or have elastically deformable wires. The device tightens and limits the coil, ensuring it fits tightly against the upper surface of the coil tightening platform. Limiting plates cover and fix the coil. When the wires at both ends of the coil are simultaneously tightened in this state, the coil will tighten further. Due to the multi-directional limiting effect, it can prevent the coil from scattering or separating during the tightening process. The operation is convenient, and eight limiting plates can simultaneously cover the coil and separate from it at the same time, making the coil tightening and limiting quick and stable. In addition, the coil is glued by using a capping dispensing machine and a glue pump. After the coil is tensioned, liquid glue is applied to the upper surface of the coil to keep the coil structure stable. The liquid glue further fixes the coil and prevents it from loosening or separating. The glue is applied through the dispensing nozzle into the gap between adjacent sliding locking plates on the upper surface of the coil to further stabilize the coil. At the same time, the coil is pressed and fixed by the limiting pressure plate to prevent the coil from loosening during the glue application process and to avoid covering the glue application area.

[0016] In addition, a magnetic shielding sheet clamping function is provided. After the adhesive is applied, the magnetic shielding sheet is pasted and placed over the coil. The magnetic shielding sheet clamp is rotated to cover the magnetic shielding sheet, so that the pre-pressing rod is in contact with the upper surface of the magnetic shielding sheet. The pre-pressing rod presses a local area of ​​the magnetic shielding sheet downward, so that the lower surface of the magnetic shielding sheet is in contact with the adhesive area above the coil. At this time, the locking drive controls the sliding locking plate to move outward, so that the limiting pressure plate is removed from above the coil, and the magnetic shielding sheet and the coil are completely in contact. When the magnetic shielding sheet clamp is continuously pressed, the magnetic shielding sheet clamp will gradually move down and be in contact with the magnetic shielding sheet. At the same time, the central protrusion of the coil retracts downward under the pressure of the magnetic shielding sheet clamp, so that the magnetic shielding sheet and the coil are fully clamped, which can effectively improve the bonding firmness of the magnetic shielding sheet and the assembly precision of the coil. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below.

[0018] The accompanying drawings described below are only related to some embodiments of the invention and are not intended to limit the invention.

[0019] In the attached diagram: Figure 1 A schematic diagram of the overall structure of this application is shown; Figure 2 A schematic diagram of the internal structure of the coil fastening platform of this application is shown; Figure 3 This invention presents a schematic diagram of the structure of the sliding lock plate in the outward-moving state. Figure 4 This invention provides a schematic diagram of the structure of the coil in its convex state at the center post. Figure 5 This diagram illustrates the structure of the coil during the gluing process of this application. Figure 6 A schematic diagram of the capping type dispensing machine of this application is shown; Figure 7 This diagram shows the structure of the magnetic shielding sheet holder and the pre-pressure plate in the separated state of this application; Figure 8 This diagram illustrates the structure of the magnetic shielding sheet when it is pressed together. Figure 9 This application shows Figure 8 Front view structural diagram; Figure 10 This application shows Figure 3 A magnified structural diagram of point A in the middle.

[0020] List of reference numerals 1. Coil fastening table; 101. Planar guide groove; 102. Central guide opening; 2. Locking drive component; 3. Tightening linkage rotary disc; 301. Rotary disc connecting rod; 4. Sliding locking plate; 401. Limiting pressure plate; 402. Locking plate slider; 403. Locking plate push shaft; 5. Coil central protrusion; 501. Protrusion pull plate; 502. Protrusion tension spring; 6. Pressure cap type dispensing machine; 601. Dispensing nozzle; 602. Diverting chamber; 603. Adhesive diverting pipe; 7. Glue pump; 8. Magnetic shielding sheet pressure frame; 801. Pressure plate connecting rod; 802. Magnetic shielding sheet pressure plate; 803. Pressure plate through-hole; 804. Pre-compression tension spring; 9. Pre-compression pull plate; 901. Pre-compression top rod. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the described embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Example 1: Please refer to Figures 1 to 9 : This invention proposes a wireless charging coil manufacturing apparatus, comprising: a coil fastening platform 1, a central guide opening 102 at the center of the coil fastening platform 1, a coil central protrusion 5 movably connected inside the central guide opening 102, a locking drive component 2 fixedly connected inside the coil fastening platform 1, a tightening linkage rotary disc 3 fixedly connected to the upper end of the rotating shaft of the locking drive component 2, eight rotary disc connecting rods 301 hinged to the upper surface of the tightening linkage rotary disc 3, the tightening linkage rotary disc 3 being coaxial with the coil fastening platform 1, and eight planar guide grooves 101 formed on the upper surface of the coil fastening platform 1. The coil fastening platform 1 has eight sliding locking plates 4 movably connected above it. Locking plate sliders 402 are fixedly connected below the sliding locking plates 4. The locking plate sliders 402 are slidably connected to the planar guide grooves 101. A limiting pressure plate 401 is fixedly connected to the end of the sliding locking plate 4 facing the center of the coil fastening platform 1. The limiting pressure plate 401 is parallel to the upper surface of the coil fastening platform 1. A locking plate push shaft 403 is vertically welded below the locking plate slider 402. The eight locking plate push shafts 403 are rotatably connected to the outer ends of eight rotating disc connecting rods 301. The coil center protrusion 5... A protruding pull plate 501 is fixedly connected to the lower end of the coil fastening platform 1. The protruding pull plate 501 is located inside the coil fastening platform 1. A protruding tension spring 502 is fixedly connected between the upper surface of the protruding pull plate 501 and the upper wall inside the coil fastening platform 1. Under normal conditions, the upper end of the central protruding post 5 of the coil protrusion 5 protrudes from the upper surface of the coil fastening platform 1 under the action of the protruding pull plate 501 and the protruding tension spring 502, thus restricting the inner coil. During the manufacturing process of the coil, when tightening the coil that has become loose during the winding process, the coil is taken out and placed above the center of the coil fastening platform 1, and the central opening of the coil is fitted onto the coil fastening platform 1. Outside the central protrusion 5, keep the copper wire in the coil in contact with the coil fastening platform 1, start the locking drive 2, and drive the tightening linkage rotary disc 3 to rotate counterclockwise through the locking drive 2. Through the action of the rotary disc connecting rod 301, pull the sliding locking plate 4 towards the center of the coil fastening platform 1, so that the limiting pressure plate 401 covers the upper surface of the coil and is in contact with it, so as to locally and evenly cover and limit the coil. In this state, tighten the two ends of the coil wire, so that the loose coil can be tightened and the coil can be tightly wound. Under the action of the limiting pressure plate 401, the coil can be prevented from falling off during the tensioning process.

[0023] In this embodiment, a pressure-cap type dispensing machine 6 is hinged to the upper left side of the coil fastening platform 1. Eight dispensing nozzles 601 are fixedly connected to the lower surface of the pressure-cap type dispensing machine 6, and these nozzles are radially and evenly distributed around the center of the pressure-cap type dispensing machine 6. A flow distribution chamber 602 is fixedly connected to the upper surface of the pressure-cap type dispensing machine 6, and eight adhesive flow distribution pipes 603 are fixedly connected to the side of the flow distribution chamber 602. The output end of the dispensing pump 7 is connected to the top of the flow distribution chamber 602 via a pipe. The dispensing nozzles 601 communicate with the flow distribution chamber 602 through the adhesive flow distribution pipes 603. The pressure-cap type dispensing machine 6 covers the coil fastening platform 1. When the coil is in the upper position, the eight dispensing nozzles 601 and the eight sliding locking plates 4 are staggered. The glue pump 7 is connected to the adhesive container through a pipe. After the coil is tensioned, the capping dispensing machine 6 is rotated to the right so that the capping dispensing machine 6 covers the top of the coil, so that the dispensing nozzles 601 are in contact with the upper surface of the coil and are inserted between the adjacent sliding locking plates 4. The glue pump 7 is started, and the glue liquid in the adhesive container is distributed and transported to the eight dispensing nozzles 601 through the diversion chamber 602 and the glue diversion pipe 603. The glue liquid is applied to the upper surface of the coil through the dispensing nozzles 601 to initially fix the coil and prevent the coil from falling off.

[0024] In Example 2, based on Example 1, a pressure plate connecting rod 801 is fixedly connected to the lower end of the magnetic shielding sheet pressure frame 8, and a magnetic shielding sheet pressure plate 802 is fixedly connected to the lower end of the pressure plate connecting rod 801. The pressure plate connecting rod 801 is perpendicular to the magnetic shielding sheet pressure plate 802. The pressure plate connecting rod 801 and the magnetic shielding sheet pressure plate 802 are coaxial, and eight strip-shaped pressure plate through-holes 803 are longitudinally opened on the magnetic shielding sheet pressure plate 802. When the magnetic shielding sheet pressure frame 8 covers the coil fastening platform 1, the eight pressure plate through-holes 803 and eight sliding locking plates 4 are staggered. A preload spring 804 is fixedly connected above 02; a preload plate 9 is slidably connected to the pressure plate connecting rod 801, and the preload plate 9 and the pressure plate connecting rod 801 are coaxial. Eight preload push rods 901 are fixedly connected to the preload plate 9. The eight preload push rods 901 are radially distributed on the lower surface of the preload plate 9 with the axis of the preload plate 9 as the center. The eight preload push rods 901 are slidably connected to the eight pressure plate through holes 803 respectively; the upper end of the preload spring 804 is fixedly connected to the lower surface of the preload plate 9. Under normal conditions, the preload plate 9 is close to the pressure plate by the tension of the preload spring 804. The magnetic shielding sheet pressure plate 802 has its lower end positioned below the pre-pressure rod 901. After the coil is glued, the pressure cap dispensing machine 6 is flipped to the left to separate it from the coil, and the magnetic shielding sheet is placed above the coil. The magnetic shielding sheet pressure frame 8 is pushed to the left so that it covers the coil. Under the action of the pre-pressure tension spring 804, the pre-pressure rod 901 is positioned below the opening of the pressure plate through-hole 803, allowing the pre-pressure rod 901 to first adhere to the magnetic shielding sheet and apply pressure. The pre-pressure rod 901 then presses a local area of ​​the magnetic shielding sheet downwards. The lower surface of the magnetic shielding sheet is attached to the adhesive area above the coil. At this time, the sliding locking plate 4 is moved outward by the locking drive 2, and the limiting pressure plate 401 is withdrawn from above the coil, so that the magnetic shielding sheet and the coil are completely attached. When the magnetic shielding sheet pressure frame 8 is continuously pressed, the magnetic shielding sheet pressure plate 802 will gradually move down and attach to the magnetic shielding sheet. At the same time, the coil center protrusion 5 retracts downward under the pressure of the magnetic shielding sheet pressure frame 8, so that the magnetic shielding sheet and the coil are fully pressed together. After a certain period of time, the adhesive solidifies, so that the coil is firmly connected to the magnetic shielding sheet, and the coil tensioning and magnetic shielding sheet installation are completed.

[0025] The working principle of this embodiment is as follows: First, during the coil manufacturing process, if a coil becomes loose due to the elasticity of the wire during winding, the coil is taken and placed above the center of the coil fastening platform 1. The center opening of the coil is tightly fitted onto the outside of the center protrusion 5 of the coil, keeping the copper wire in the coil in contact with the coil fastening platform 1. The locking drive 2 is activated, which drives the tightening linkage rotary disc 3 to rotate counterclockwise. Through the action of the rotary disc connecting rod 301, the sliding locking plate 4 is pulled towards the center of the coil fastening platform 1, so that the limiting pressure plate 401 covers the coil. The surface is then adhered to, partially covering and clamping the coil. In this state, the ends of the coil wire are tightened, causing the loose coil to re-wrap tightly. The limiting pressure plate 401 prevents the coil from scattering during tensioning. The capping dispensing machine 6 is rotated to the right, covering the coil and ensuring the dispensing nozzle 601 adheres to the upper surface of the coil and is inserted between adjacent sliding locking plates 4. The adhesive in the adhesive container is distributed and delivered to the eight dispensing nozzles 601 via the dispensing pump 7 through the diversion chamber 602 and adhesive diversion pipe 603. The nozzle 601 applies glue to a portion of the upper surface of the coil to initially fix the coil and prevent it from falling off. After the coil is glued, the pressure cap dispensing machine 6 is flipped to the left to separate it from the coil. The magnetic shielding sheet is placed above the coil, and the magnetic shielding sheet holder 8 is pushed to the left so that it is positioned above the coil. This allows the pre-pressing rod 901 to first adhere to the magnetic shielding sheet and apply pressure, pressing down on a localized area of ​​the magnetic shielding sheet. The lower surface of the magnetic shielding sheet adheres to the glued area above the coil. At this point, the locking drive 2 is activated in reverse, causing the tightening linkage rotary disc 3 to rotate clockwise. The rotating connecting rod 301 pushes the sliding locking plate 4 outward, and the control limit plate 401 is withdrawn from above the coil, so that the magnetic shielding sheet and the coil are completely in contact. When the magnetic shielding sheet holder 8 is continuously pressed, the magnetic shielding sheet holder 802 will gradually move down and be in contact with the magnetic shielding sheet. At the same time, the coil center protrusion 5 retracts downward under the pressure of the magnetic shielding sheet holder 8, so that the magnetic shielding sheet and the coil are fully pressed together. Keep it for a certain period of time to allow the adhesive to solidify, so that the coil is firmly connected to the magnetic shielding sheet, and the coil tensioning and magnetic shielding sheet installation are completed. After the magnetic shielding sheet holder 8 is flipped to the right and reset, the coil is removed from above the coil fastening platform 1.

[0026] The following points should be noted in this article: 1. The accompanying drawings of the embodiments disclosed herein only relate to the structures involved in the embodiments disclosed herein; other structures can be referred to in a general design.

[0027] 2. Where there is no conflict, the embodiments of this disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.

[0028] The above are merely specific embodiments of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A wireless charging coil manufacturing apparatus, comprising: A coil fastening platform (1) has a central guide opening (102) at its center, and a coil center protrusion (5) is movably connected inside the central guide opening (102). The platform is characterized by a locking drive component (2) fixedly connected inside the coil fastening platform (1), a tightening linkage disc (3) fixedly connected to the upper end of the rotating shaft of the locking drive component (2), eight disc connecting rods (301) hinged to the upper surface of the tightening linkage disc (3), the tightening linkage disc (3) being coaxial with the coil fastening platform (1), eight planar guide grooves (101) opening on the upper surface of the coil fastening platform (1), the eight planar guide grooves (101) being evenly distributed radially from the center of the upper surface of the coil fastening platform (1), and eight sliding locking plates (4) movably connected above the coil fastening platform (1). A locking plate slider (402) is fixedly connected below the sliding locking plate (4). The locking plate slider (402) is slidably connected to the planar guide groove (101). A limiting pressure plate (401) is fixedly connected to one end of the sliding locking plate (4) facing the center of the coil fastening platform (1). The limiting pressure plate (401) is parallel to the upper surface of the coil fastening platform (1). A locking plate push shaft (403) is vertically welded below the locking plate slider (402). The eight locking plate push shafts (403) are respectively rotatably connected to the outer ends of eight rotating disc connecting rods (301). A protruding column pull plate (501) is fixedly connected to the lower end of the coil center protruding column (5). The protruding column pull plate (501) is located inside the coil fastening platform (1). A protruding column tension spring (502) is fixedly connected between the upper surface of the protruding column pull plate (501) and the upper wall inside the coil fastening platform (1).

2. The wireless charging coil manufacturing apparatus according to claim 1, characterized in that, A pressure-cap dispensing machine (6) is hinged to the upper left side of the coil fastening platform (1). Eight dispensing nozzles (601) are fixedly connected to the lower surface of the pressure-cap dispensing machine (6). The eight dispensing nozzles (601) are evenly distributed radially around the center of the pressure-cap dispensing machine (6).

3. The wireless charging coil manufacturing apparatus according to claim 2, characterized in that, The upper surface of the capping dispensing machine (6) is fixedly connected to a flow distribution chamber (602), and eight glue flow distribution pipes (603) are fixedly connected to the side of the flow distribution chamber (602).

4. The wireless charging coil manufacturing apparatus according to claim 3, characterized in that, The output end of the glue pump (7) is connected to the top of the flow divider (602) via a pipe, and the glue nozzle (601) is connected to the flow divider (602) via the glue flow divider pipe (603).

5. The wireless charging coil manufacturing apparatus according to claim 2, characterized in that, When the capping dispensing machine (6) covers the coil fastening table (1), the eight dispensing nozzles (601) and the eight sliding locking plates (4) are staggered.

6. The wireless charging coil manufacturing apparatus according to claim 1, characterized in that, After applying the adhesive, attach the magnetic shielding sheet and place it over the coil. The magnetic shielding sheet is then rotated over the magnetic shielding sheet by the magnetic shielding sheet holder (8). A pressure plate connecting rod (801) is fixedly connected to the lower end of the magnetic shielding sheet holder (801). A magnetic shielding sheet pressure plate (802) is fixedly connected to the lower end of the pressure plate connecting rod (801). The pressure plate connecting rod (801) is perpendicular to the magnetic shielding sheet pressure plate (802).

7. The wireless charging coil manufacturing apparatus according to claim 6, characterized in that, The pressure plate connecting rod (801) is coaxial with the magnetic shielding plate (802), and the magnetic shielding plate (802) has eight strip-shaped pressure plate openings (803) that run longitudinally through it.

8. The wireless charging coil manufacturing apparatus according to claim 7, characterized in that, When the magnetic shielding plate holder (8) covers the coil fastening platform (1), the eight pressure plate openings (803) and the eight sliding locking plates (4) are staggered. A preload tension spring (804) is fixedly connected above the magnetic shielding plate holder (802).

9. A wireless charging coil manufacturing apparatus according to claim 8, characterized in that, The pressure plate connecting rod (801) is slidably connected to a pre-pressure pull plate (9). The pre-pressure pull plate (9) is coaxial with the pressure plate connecting rod (801). The pre-pressure pull plate (9) is fixedly connected to eight pre-pressure top rods (901). The eight pre-pressure top rods (901) are radially distributed on the lower surface of the pre-pressure pull plate (9) with the axis of the pre-pressure pull plate (9) as the center. The eight pre-pressure top rods (901) are slidably connected in eight pressure plate through holes (803).

10. A wireless charging coil manufacturing apparatus according to claim 9, characterized in that, The lower surface of the pre-compression plate (9) is fixedly connected to the upper end of the pre-compression spring (804). Under normal conditions, the pre-compression plate (9) is pulled close to the magnetic shielding plate (802) by the tension of the pre-compression spring (804), and the lower end of the pre-compression top rod (901) is located below the magnetic shielding plate (802).

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