A combined coil processing jig
By designing a combined coil processing fixture with multiple glue application holes and limiting grooves, the coil and ferrite sheet are bonded and fixed in a closed state, which solves the problem of low production efficiency in the existing technology and improves the overall production efficiency and bonding strength.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- DONGGUAN KIMCHEN IND INTL LTD
- Filing Date
- 2025-08-20
- Publication Date
- 2026-07-14
AI Technical Summary
In existing technologies, the bonding process between the coil and the ferrite sheet requires multiple opening and closing of the fixture, resulting in low production efficiency.
Design a combined coil processing fixture, including an upper cover plate and a lower cover plate, with multiple glue application holes and limiting grooves, allowing the bonding and fixing of the coil to the ferrite sheet to be completed in the closed state, and realizing the full-process glue application operation through multiple glue application holes.
This reduces the interval between gluing and adhesive curing, improves production efficiency, and ensures a strong bond between the coil and the ferrite sheet.
Smart Images
Figure CN224501678U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of auxiliary tools for coil processing, and in particular to a combined coil processing fixture. Background Technology
[0002] Wireless charging modules typically consist of several coils and ferrite sheets. The coils are made of enameled copper wire, with the ends of the wire extending out to form pins for electrical connection. Several coils are stacked alternately, serving as energy transmission carriers. They can be connected to external transmitter drive circuits or receiver rectifier circuits via the pins to achieve wireless power transfer. Ferrite sheets are attached below the coils. The ferrite sheets constrain the magnetic field of the coils to reduce interference from leakage magnetic fields on surrounding circuits and enhance the magnetic field coupling efficiency between coils, ensuring charging stability.
[0003] In the relevant technology, several coils are first stacked inside the fixture, then a ferrite sheet is stacked on top and the fixture is closed to fix the position of the coils and the ferrite sheet. Then, the process moves to the bonding process. After that, the fixture needs to be opened first, and several coils are bonded and fixed by the first application of adhesive. Then, a second application of adhesive is performed to bond the coil group to the ferrite sheet. Finally, the fixture is closed again to cure the overall adhesive.
[0004] However, before applying adhesive to bond the coil and ferrite sheet, the fixture needs to be opened and adhesive applied twice. Then the fixture needs to be closed again for adhesive curing. This process sequence creates a gap between the adhesive application and curing stages for the coil and ferrite sheet, thus extending the overall processing cycle and affecting production efficiency to some extent. Utility Model Content
[0005] To address the aforementioned problems, this application provides a combined coil processing fixture.
[0006] The combined coil processing fixture provided in this application adopts the following technical solution:
[0007] A combined coil processing fixture includes an upper cover plate and a lower cover plate, the upper cover plate covering the lower cover plate, and the lower cover plate having a placement groove. The placement groove has a first adhesive application hole, a second adhesive application hole, and a third adhesive application hole. There are a plurality of first adhesive application holes, second adhesive application holes, and third adhesive application holes arranged in parallel. The plurality of first adhesive application holes, second adhesive application holes, and third adhesive application holes are arranged in parallel. The first adhesive application hole is located between two adjacent second adhesive application holes, and the third adhesive application hole is located above the second adhesive application hole. The first adhesive application hole, second adhesive application hole, and third adhesive application hole penetrate the placement groove.
[0008] By adopting the above technical solution, after the coil is placed in the placement slot of the lower cover plate, the upper cover plate closes the inner wall of the upper cover slot to form a positioning space with the placement slot. The gluing process can be completed while the fixture is closed. Using several parallel first gluing holes, several coils stacked vertically in the placement slot can be directly glued to fix them. After fixing the coil, gluing can be applied directly to the contact area between the coil and the ferrite sheet through the second gluing hole to complete the bonding between the coil and the ferrite sheet. Then, through the third gluing hole located above the second gluing hole, gluing is applied to the contact area between the coil leads and the ferrite sheet. The application of adhesive at specific locations achieves fixation, and the pin fixation effectively constrains the coil, reducing the possibility of the tightly wound coil loosening due to external force pulling during subsequent processing, assembly, or use. The entire adhesive application process—including coil fixation, coil-ferrite sheet bonding, and coil pin-ferrite sheet fixation—can be completed sequentially using the distribution of the first, second, and third adhesive application holes without the need for disassembly of the fixture. This allows for direct transition to the curing stage after adhesive application, reducing the interval between adhesive application and curing and improving production efficiency.
[0009] Preferably, a limiting groove is provided in the middle of the placement groove, a first boss is fixedly provided in the limiting groove, a first limiting block and a second limiting block are fixedly provided on the upper surface of the first boss, the first limiting block and the second limiting block are provided at both ends of the first boss, the first limiting block and the second limiting block are parallel to both ends of the first boss, and the first glue application hole is provided on the first boss.
[0010] By adopting the above technical solution, the limiting groove defines the placement area of the coil in terms of the overall outline, reducing the occurrence of large-scale lateral movement of the coil. The first boss abuts against the inner side of the coil, limiting the radial position of the coil. The first limiting block and the second limiting block coincide with the edges of the two ends of the first boss, forming symmetrical lateral obstructions from both ends of the coil, limiting the left and right displacement of the coil in the horizontal direction, so as to reduce the occurrence of displacement of the coil due to external force contact or glue impact during the glue application process.
[0011] Preferably, a second protrusion is provided at both ends of the limiting groove, the second protrusion is symmetrically arranged along the first protrusion, the second protrusion is fixed perpendicularly to the placement groove, the second protrusion coincides with the edge of the limiting groove, the second glue application hole is provided on the second protrusion, and the first glue application hole is provided on the first protrusion.
[0012] By adopting the above technical solution, the second protrusion is symmetrically distributed along the first protrusion and is fixed perpendicularly to the placement groove. The edge of the second protrusion coincides with the limiting groove. The end face sidewall of the second protrusion away from the limiting groove contacts the inner edge of the upper coil stacked on the lower coil of the limiting groove, thereby achieving axial limiting of the upper coil. The second protrusion is symmetrically arranged along the first protrusion, which can make the two upper coils symmetrical above the lower coil. The second protrusion limits the radial position of the two upper coils, so that a stable gap and bonding surface are formed between the stacked coils, which facilitates the function of the first glue application hole. After the coils are stacked, glue can be injected between the coil layers through the first glue application hole, so that the glue penetrates to the bonding part of the upper coil and the lower coil, thereby achieving mutual bonding and fixation between the stacked coils. After the ferrite sheet is stacked on the coil, glue is injected into the bonding surface between the coil and the ferrite sheet through the second glue application hole, thereby achieving a firm bond between the coil and the ferrite sheet.
[0013] Preferably, a third protrusion is provided on the left and right ends of the placement groove, the third protrusion is fixed perpendicularly to the placement groove, and the third protrusion coincides with the edge of the placement groove.
[0014] By adopting the above technical solution, the third boss and the second boss form a transverse alignment structure. When the inner side of the upper coil abuts against the side wall of the second boss to form an inner support, the side wall of the third boss abuts against the outer side of the upper coil to form a blockage and limit the radial displacement of the upper coil in the horizontal direction. At the same time, the upper surface of the third boss provides a stable support reference for the ferrite sheet. When the ferrite sheet is stacked, it can be placed directly on the third boss. The flatness of the third boss ensures the parallelism between the ferrite sheet and the lower coil, creating stable contact conditions for the second glue application hole to inject glue into the bonding surface of the coil and the ferrite sheet.
[0015] Preferably, a third limiting block is provided on the upper surface of the first boss, and the third limiting block is located in the middle of the first boss.
[0016] By adopting the above technical solution, the side of the upper coil away from the third boss can abut against the third limiting block, further restricting the circumferential rotation and radial displacement of the upper coil. This stable positioning state allows the first glue application hole to be aligned with the bonding areas between several coil layers, so that the glue can be accurately injected into several coil bonding parts along the first glue application hole, thereby improving the bonding strength between coil layers.
[0017] Preferably, the upper edge of the third adhesive application hole is provided with several clearance grooves.
[0018] By adopting the above technical solution, the relief groove provides an extension channel for the coil pin, allowing the pin to extend smoothly out of the fixture and reducing the accumulation of pins inside the fixture. After the pin extends through the relief groove, the contact area between the pin and the ferrite sheet is exposed within the glue injection range of the third glue application hole, ensuring stable glue bonding position and ultimately improving the bonding strength between the pin and the ferrite sheet.
[0019] Preferably, the lower cover plate is provided with a positioning groove, the upper cover plate is provided with a positioning block, the positioning block is inserted into the positioning groove, and the positioning groove is connected to the clearance groove.
[0020] By adopting the above technical solution, the positioning groove and the positioning block can be connected and matched to quickly calibrate the relative position of the upper and lower cover plates when they are closed. The positioning groove and the relief groove are connected, so that when the coil pin extends through the relief groove, the positioning groove and the positioning block can be used to further constrain the coil pin, ensuring that the coil pin is always within the glue injection range of the third glue application hole. This improves the glue application stability and bonding quality of the doctor's coil pin and the ferrite sheet.
[0021] Preferably, the lower cover plate is provided with a magnet, and a plurality of magnets are provided, which are evenly distributed along the upper surface of the lower cover plate. The upper cover plate is provided with a clearance hole, which magnetically engages with the magnet.
[0022] By adopting the above technical solution, the magnet and the clearance hole form a magnetic attraction fit, which can enhance the tightness of the upper and lower cover plates through the uniform attraction force between the magnet and the clearance hole, reduce the occurrence of loosening due to external vibration after the cover is closed, and the stable cover state can provide a stable environment for the glue application process, thereby ensuring the stability of the glue bonding quality.
[0023] In summary, this application includes at least one of the following beneficial technical effects:
[0024] 1. After the coil is placed in the placement slot, the coils stacked vertically can be directly fixed through the first glue application hole. Then, the coil is bonded to the ferrite sheet through the second glue application hole. Finally, the coil leads are fixed to the ferrite sheet through the third glue application hole. Fixing the coil leads can effectively constrain the coil and reduce the loosening of the coil caused by external force pulling the coil leads. The whole process basically does not require disassembling the fixture in the middle. After applying glue, it can be directly transferred to the curing stage, reducing the interval between processes and significantly improving production efficiency.
[0025] 2. The second protrusion is symmetrically distributed along the first protrusion. The second protrusion is fixed perpendicularly to the placement groove, and the edge of the second protrusion coincides with the edge of the limiting groove. The end face sidewall of the second protrusion away from the limiting groove contacts the inner edge of the upper coil superimposed on the lower coil, thereby achieving axial limiting of the upper coil. The symmetrical arrangement makes the two upper coils symmetrically distributed above the lower coil, while limiting the radial position of the upper coils, so that a stable gap and bonding surface are formed between the superimposed coils, which facilitates the injection of glue into the coil layers through the first glue application hole, so that the glue penetrates to the bonding part to achieve mutual bonding and fixation of the superimposed coils. The second glue application hole on the second protrusion can inject glue into the bonding surface between the coil and the ferrite sheet after the ferrite sheet is superimposed, thereby achieving a firm bond between the coil and the ferrite sheet.
[0026] 3. When the inner side of the upper coil abuts against the side wall of the second boss to form support, the side wall of the third boss abuts against the outer side of the upper coil to form a blockage, together limiting the radial displacement of the upper coil in the horizontal direction. At the same time, the upper surface of the third boss provides stable support for the ferrite sheet. The flatness of the third boss ensures the parallelism between the ferrite sheet and the lower coil, creating a flat and stable contact condition for the second glue application hole to inject glue into the bonding surface between the coil and the ferrite sheet, thus improving the bonding reliability. Attached Figure Description
[0027] Figure 1 This is a structural schematic diagram of an embodiment of this application.
[0028] Figure 2 This is a structural schematic diagram of the lower cover plate.
[0029] Figure 3 This is a structural diagram of the lower cover plate and the upper cover plate.
[0030] Explanation of reference numerals in the attached drawings: 1. Lower cover plate; 11. Placement groove; 111. First adhesive application hole; 112. Second adhesive application hole; 113. Third adhesive application hole; 114. Limiting groove; 1141. First boss; 1142. First limiting block; 1143. Second limiting block; 1144. Third limiting block; 115. Second boss; 116. Third boss; 12. Relief groove; 13. Positioning groove; 14. Magnet; 2. Upper cover plate; 21. Positioning block; 22. Relief hole. Detailed Implementation
[0031] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.
[0032] This application discloses a combined coil processing fixture. (Refer to...) Figure 1 and Figure 2A combined coil processing fixture includes an upper cover plate 2 and a lower cover plate 1. The lower cover plate 1 is provided with a placement groove 11, in which several coils and ferrite sheets are placed. The upper cover plate 2 covers the lower cover plate 1, thereby fixing the coils and ferrite sheets placed in the placement groove 11 of the lower cover plate 1 within the placement groove 11.
[0033] Specifically, the placement groove 11 has a first adhesive application hole 111, a second adhesive application hole 112, and a third adhesive application hole 113, which penetrate the placement groove 11. There are a plurality of first adhesive application holes 111, second adhesive application holes 112, and third adhesive application holes 113. In this embodiment, there is one first adhesive application hole 111, two second adhesive application holes 112, and three third adhesive application holes 113. The two second adhesive application holes 112 are arranged in parallel, and the first adhesive application hole 111 is located between the two first adhesive application holes 111 and at the lower end of the second adhesive application hole 112. The three third adhesive application holes 113 are arranged in parallel, and the third adhesive application hole 113 is located above the second adhesive application hole 112. This layout allows the adhesive to be evenly distributed in different positions, ensuring good bonding between coils and between coils and ferrite sheets.
[0034] Furthermore, a limiting groove 114 is provided in the middle of the placement groove 11, and a first boss 1141 is fixedly provided in the middle of the limiting groove 114. The shape of the first boss 1141 matches the inner side of the coil. A first limiting block 1142 and a second limiting block 1143 are fixedly provided on the upper surface of the first boss 1141. The first limiting block 1142 and the second limiting block 1143 are provided at the two ends of the first boss 1141 and coincide with the two ends of the first boss 1141. A third limiting block 1144 is provided on the upper surface of the first boss 1141 and is located in the middle of the first boss 1141.
[0035] Meanwhile, a second protrusion 115 is provided at both ends of the limiting groove 114. The second protrusion 115 is symmetrically arranged along the first protrusion 1141. The second protrusion 115 is fixed perpendicularly to the placement groove 11. The second protrusion 115 coincides with the edge of the limiting groove 114. In addition, a second glue application hole 112 is provided on the second protrusion 115, and a first glue application hole 111 is provided on the first protrusion 1141. Furthermore, a third protrusion 116 is provided on the left and right edges of the placement groove 11. The third protrusion 116 is fixed perpendicularly to the placement groove 11 and coincides with the edge of the placement groove 11.
[0036] Furthermore, in this embodiment, the combined coil is placed in the limiting groove 114 with the lower coil stacked on top of the coil placed in the limiting groove 114. The two upper coils are parallel to each other. The first boss 1141 abuts against the inner sidewall of the coil, defining the radial position of the lower coil. The first limiting block 1142 and the second limiting block 1143 coincide with the two ends of the first boss 1141, forming symmetrical lateral obstructions from both ends of the coil, limiting the left and right displacement of the coil in the horizontal direction. This reduces the occurrence of displacement of the coil due to external force or glue impact during the glue application process. The limiting groove 114 defines the placement area of the coil in terms of its overall outline, reducing the occurrence of large-scale lateral movement of the coil.
[0037] Furthermore, the second boss 115 is vertically fixed in the placement groove 11, and the edge of the second boss 115 coincides with the limiting groove 114. When the upper coil is stacked, the end face sidewall of the second boss 115 away from the limiting groove 114 just contacts the inner sidewall of the upper coil. At the same time, since the third boss 116 and the second boss 115 form a transverse alignment structure, when the inner side of the upper coil abuts against the sidewall of the second boss 115, the sidewall of the third boss 116 will simultaneously abut against the outer sidewall of the upper coil, thereby forming a bidirectional limiting, effectively reducing the radial displacement of the upper coil in the horizontal direction. In addition, the side of the upper coil away from the third boss 116 can also abut against the third limiting block 1144, further restricting the circumferential rotation of the upper coil.
[0038] Furthermore, the symmetrical arrangement of the second protrusion 115 allows the two upper coils to be symmetrically distributed above the lower coil. The sidewall of the second protrusion 115 limits the radial position of the upper coils, ensuring a stable gap and bonding surface between the coils after stacking. The bonding surfaces of the three coils are exposed to the glue application area of the first glue application hole 111, providing precise alignment for the glue injection operation of the first glue application hole 111. After the coils are stacked, glue can be injected into the bonding area between the coil layers through the first glue application hole 111 to achieve interlayer bonding and fixation.
[0039] In addition, the upper surface of the third boss 116 serves as a support reference for the ferrite sheet. When the ferrite sheet is placed in the placement groove 11, it contacts the upper surface of the third boss 116. The flatness of the third boss 116 ensures that the ferrite sheet remains parallel to the three coils, creating stable contact conditions for the second glue application hole 112 to apply glue to the bonding surface between the coil and the ferrite sheet. Glue is applied to the bonding surface between the upper two coils and the ferrite sheet through the second glue application hole 112. At the same time, by applying glue synchronously to the coil located in the limiting groove 114 and the upper two coils, the synchronous fixing of the three coils on the surface of the ferrite sheet is achieved.
[0040] Furthermore, the upper edge of the third adhesive application hole 113 is provided with a plurality of clearance grooves 12. In this embodiment, each upper edge of the third adhesive application hole 113 is provided with two clearance grooves 12. These clearance grooves 12 provide a suitable extension channel for the coil pins, which can reduce the accumulation and entanglement of the pins inside the fixture. After the pins extend through the clearance grooves 12, the contact part between the pins and the ferrite sheet is precisely exposed within the adhesive application range of the third adhesive application hole 113, ensuring stable adhesive bonding position and ultimately improving the bonding strength between the pins and the ferrite sheet.
[0041] This demonstrates that the above-mentioned bonding of the coil and coil pins to the ferrite sheet can be completed without opening the fixture midway. With the help of the distribution of the first adhesive application hole 111, the second adhesive application hole 112, and the third adhesive application hole 113, the entire process of fixing the coil, bonding the coil to the ferrite sheet, and fixing the coil pins to the ferrite sheet can be completed sequentially. This allows the curing process to proceed directly after adhesive application, reducing the interval between adhesive application and adhesive curing and improving production efficiency.
[0042] Reference Figure 3 In addition, the lower cover plate 1 is provided with a positioning groove 13, and the upper cover plate 2 is provided with a positioning block 21. The positioning block 21 is inserted into the positioning groove 13, and the positioning groove 13 is connected to the clearance groove 12. The cooperation between the positioning groove 13 and the positioning block 21 can ensure that the upper cover plate 2 is accurately covered on the lower cover plate 1, and ensure that the coil and ferrite sheet in the placement groove 11 are accurately fixed.
[0043] In addition, the lower cover plate 1 is provided with magnets 14, and there are several magnets 14. In this embodiment, there are four magnets 14. The four magnets 14 are evenly distributed along the upper surface of the lower cover plate 1. The upper cover plate 2 is provided with clearance holes 22. The clearance holes 22 and the magnets 14 are magnetically attracted to each other. The uniform attraction force between the magnets 14 and the clearance holes 22 can enhance the tightness of the upper cover plate 2 and the lower cover plate 1, reduce the loosening caused by external vibration after the cover is closed, and the stable closing state can provide a stable environment for the glue application process, thereby ensuring the stability of the glue bonding quality.
[0044] The implementation principle of a combined coil processing fixture according to an embodiment of this application is as follows:
[0045] In use, one of the coils is placed in the limiting groove 114, and the coil abuts against the first boss 1141, the first limiting plate, and the second limiting plate. Then, the two coils are placed between the second boss 115 and the third boss 116 respectively. The inner side of the coil abuts against the second boss 115, and the outer side of the coil abuts against the third boss 116 and the third limiting plate respectively. The coil leads extend out of the outside of the fixture through the relief groove 12. Then, the ferrite sheet is placed on the upper surface of the third boss 116, and then the upper cover plate 2 is covered. Due to the cooperation between the positioning block 21 and the positioning groove 13, the upper cover plate 2 can be accurately covered. At the same time, the magnetic attraction between the magnet 14 and the relief hole 22 makes the upper cover plate 2 and the lower cover plate 1 tightly fixed.
[0046] Next, adhesive is applied to the stacked coils through the first adhesive application hole 111, adhesive is applied to the bonding surface between the upper coil and the ferrite sheet through the second adhesive application hole 112, and adhesive is applied to the bonding surface between the coil leads and the ferrite sheet through the third adhesive application hole 113. This achieves bonding between the coils and between the coil and the ferrite sheet. This adhesive application process does not require disassembling the fixture midway. With the distribution of the first adhesive application hole 111, the second adhesive application hole 112, and the third adhesive application hole 113, the entire process of coil fixing, coil bonding with the ferrite sheet, and coil lead fixing with the ferrite sheet can be completed in sequence. After adhesive application, the process can directly enter the curing stage, reducing the connection interval between adhesive application and adhesive curing and improving production efficiency.
[0047] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A combined coil processing fixture, characterized in that, Includes an upper cover plate (2) and a lower cover plate (1), the upper cover plate (2) covering the lower cover plate (1), the lower cover plate (1) being provided with a placement groove (11), the placement groove (11) having a first glue application hole (111), a second glue application hole (112) and a third glue application hole (113), the first glue application hole (111), the second glue application hole (112) and the third glue application hole (113) being provided in a plurality of such holes. The first adhesive hole (111) is located between two adjacent second adhesive holes (112), and the third adhesive hole (113) is located above the second adhesive holes (112). The first adhesive hole (111), the second adhesive hole (112), and the third adhesive hole (113) penetrate the placement groove (11).
2. The combined coil processing fixture according to claim 1, characterized in that, A limiting groove (114) is provided in the middle of the placement groove (11). A first boss (1141) is fixedly provided in the limiting groove (114). A first limiting block (1142) and a second limiting block (1143) are fixedly provided on the upper surface of the first boss (1141). The first limiting block (1142) and the second limiting block (1143) are provided at the two ends of the first boss (1141). The first limiting block (1142) and the second limiting block (1143) coincide with the two ends of the first boss (1141). The first glue application hole (111) is provided on the first boss (1141).
3. The combined coil processing fixture according to claim 2, characterized in that, The limiting groove (114) has a second boss (115) at both ends. The second boss (115) is symmetrically arranged along the first boss (1141). The second boss (115) is vertically fixed to the placement groove (11). The second boss (115) coincides with the edge of the limiting groove (114). The second glue application hole (112) is provided on the second boss (115), and the first glue application hole (111) is provided on the first boss (1141).
4. A combined coil processing fixture according to claim 2, characterized in that, The left and right ends of the placement groove (11) are also provided with a third protrusion (116), which is fixed perpendicularly to the placement groove (11) and coincides with the edge of the placement groove (11).
5. A combined coil processing fixture according to claim 2, characterized in that, A third limiting block (1144) is provided on the upper surface of the first boss (1141), and the third limiting block (1144) is located in the middle of the first boss (1141).
6. A combined coil processing fixture according to claim 1, characterized in that, The upper edge of the third adhesive application hole (113) is provided with several clearance grooves (12).
7. A combined coil processing fixture according to claim 6, characterized in that, The lower cover plate (1) is provided with a positioning groove (13), and the upper cover plate (2) is provided with a positioning block (21). The positioning block (21) is inserted into the positioning groove (13), and the positioning groove (13) is connected to the clearance groove (12).
8. A combined coil processing fixture according to claim 1, characterized in that, The lower cover plate (1) is provided with a magnet (14), and there are several magnets (14) evenly distributed along the upper surface of the lower cover plate (1). The upper cover plate (2) is provided with a clearance hole (22), and the clearance hole (22) is magnetically attracted to the magnet (14).