Coil module and electronic equipment

Abstract

The utility model relates to a coil module and electronic equipment. The coil module comprises an insulating film and at least one diaphragm assembly. The diaphragm assembly comprises a supporting diaphragm and a metal coil located on the supporting diaphragm. The supporting diaphragm comprises a first surface and a second surface which are oppositely arranged in the thickness direction, and the first surface is far away from the insulating film compared with the second surface. A film layer area is arranged on the second surface, and a metal layer is prepared in the film layer area to form a metal coil. The first surface and the second surface have the same radian. The metal coil capable of adapting to and being attached to the radian of the supporting diaphragm is prepared on the supporting diaphragm, so that the diaphragm assembly is formed; and then the diaphragm assembly is attached to the insulating film to form the coil module. According to the arrangement, the distance between the metal coil and the outer surface of the coil module can be greatly reduced, the signal strength and the transmission efficiency are improved, and the induction performance of the electronic equipment where the coil module is located is effectively improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of circuit metal plate, in particular to a coil module and electronic equipment. BACKGROUND

[0002] In the design of electronic equipment, in order to achieve the balance between beauty and function, the NFC induction area of the product appearance often adopts arc surface modeling, and a certain thickness of structural member needs to be configured to ensure the overall structural stability and product performance. However, this kind of setting causes the NFC coil to sink more when it is laid out in the product, and the distance from the outer surface increases. NFC technology relies on the close induction of the coil and external devices, and the increase in distance will weaken the signal strength and transmission efficiency, making it difficult to meet the user's demand for efficient and convenient NFC experience. CONTENT OF THE UTILITY MODEL

[0003] To solve the above problems, the present application provides a coil module for fixing to a shell, the coil module comprising an insulating film and at least one membrane assembly stacked along the thickness direction; the membrane assembly comprises a metal coil and a support membrane, the metal coil is located on the side of the support membrane close to the insulating film; wherein,

[0004] The support membrane comprises a first surface and a second surface arranged opposite along the thickness direction, the first surface is farther away from the insulating film than the second surface; a film layer region is provided on the second surface, a metal layer is prepared in the film layer region to form the metal coil; the first surface and the second surface have the same curvature.

[0005] In one of the embodiments, the coil module further comprises an external connecting member, one end of the external connecting member is arranged to pass through the shell and is electrically connected with the coil module, the other end of the external connecting member is electrically connected with an external device.

[0006] In one of the embodiments, when the coil module contains only one membrane assembly, the metal coil comprises a first external connecting end and a second external connecting end, the external connecting member comprises a first sub-external connecting member and a second sub-external connecting member, the first sub-external connecting member is used to connect the first external connecting end of the metal coil and an external device, and the second sub-external connecting member is used to connect the second external connecting end and an external device.

[0007] In one of the embodiments, the shell is provided with a first clearance hole and a second clearance hole, the insulating film is provided with a third clearance hole and a fourth clearance hole, the first clearance hole and the third clearance hole are arranged correspondingly along the thickness direction of the shell, and the second clearance hole and the fourth clearance hole are arranged correspondingly along the thickness direction of the shell; wherein,

[0008] The first sub-external connecting piece is electrically connected with the first external connecting end of the metal coil after being sequentially arranged in the first and third accommodating holes.

[0009] In one of the embodiments, when the coil module comprises at least two groups of diaphragm assemblies, any two adjacent groups of the diaphragm assemblies are fixedly connected in the thickness direction; wherein the metal coil close to the shell is referred to as an inner layer metal coil, the metal coil far from the shell is referred to as an outer layer metal coil, the diaphragm close to the shell is referred to as an inner diaphragm, and the diaphragm far from the shell is referred to as an outer diaphragm; the inner layer metal coil and the outer layer metal coil are connected in series to form an open first coil winding, and the external connecting piece comprises a first sub-external connecting piece and a second sub-external connecting piece.

[0010] One end of the first coil winding is a first external connecting end, and the other end is a second external connecting end; the first external connecting end is electrically connected with an external device through the first sub-external connecting piece, and the second external connecting end is electrically connected with an external device through the second sub-external connecting piece.

[0011] In one of the embodiments, the shell is provided with a first accommodating hole and a second accommodating hole, the insulating film is provided with a third accommodating hole corresponding to the first accommodating hole and a fourth accommodating hole corresponding to the second accommodating hole, the inner diaphragm is provided with a fifth accommodating hole corresponding to the third accommodating hole, and the fifth accommodating hole is used for electrically connecting the inner layer metal coil and the outer layer metal coil.

[0012] The first sub-external connecting piece is electrically connected with the first external connecting end of the first coil winding after being sequentially arranged in the first and third accommodating holes, and the second sub-external connecting piece is electrically connected with the second external connecting end of the first coil winding after being sequentially arranged in the second and fourth accommodating holes.

[0013] In one of the embodiments, the first sub-external connecting piece is sequentially arranged in the first, third and fifth accommodating holes after being sequentially arranged in the first and third accommodating holes, and is used for electrically connecting the inner layer metal coil and the outer layer metal coil; or

[0014] The coil module further comprises a metal connecting part, the metal connecting part is located in the fifth accommodating hole, and is used for electrically connecting the inner layer metal coil and the outer layer metal coil.

[0015] In one of the embodiments, when the coil module comprises at least two groups of diaphragm assemblies, any two adjacent groups of diaphragm assemblies are fixedly connected in the thickness direction; wherein the coil close to the shell is referred to as an inner layer metal coil, the metal coil far from the shell is referred to as an outer layer metal coil, the support diaphragm close to the shell is referred to as an inner diaphragm, and the support diaphragm far from the shell is referred to as an outer diaphragm; the inner layer metal coil and the outer layer metal coil are connected in parallel to form a closed second coil winding, and the external connector comprises a first sub-external connector and a second sub-external connector.

[0016] The second coil winding comprises a first external connection point and a second external connection point, the first external connection point is electrically connected with an external device through the first sub-external connector, and the second external connection point is electrically connected with an external device through the second sub-external connector.

[0017] In one of the embodiments, the shell is provided with a first clearance hole and a second clearance hole, the insulating film is provided with a third clearance hole corresponding to the first clearance hole and a fourth clearance hole corresponding to the second clearance hole, the inner diaphragm is provided with a fifth clearance hole corresponding to the third clearance hole and a sixth clearance hole corresponding to the fourth clearance hole.

[0018] The first sub-external connector is electrically connected with the first external connection point of the second coil winding after being sequentially arranged in the first clearance hole and the third clearance hole, and the second sub-external connector is electrically connected with the second external connection point of the second coil winding after being sequentially arranged in the second clearance hole and the fourth clearance hole.

[0019] In one of the embodiments, the first sub-external connector is sequentially arranged in the first clearance hole, the third clearance hole and the fifth clearance hole, and the second sub-external connector is sequentially arranged in the second clearance hole, the fourth clearance hole and the sixth clearance hole, so as to electrically connect the inner layer metal coil and the outer layer metal coil; or

[0020] The coil module further comprises a metal connecting part, which is respectively arranged in the fifth clearance hole and the sixth clearance hole, and is used for electrically connecting the inner layer metal coil and the outer layer metal coil.

[0021] In one of the embodiments, the thickness of the support diaphragm in the thickness direction of the coil module is 0.1mm-0.8mm; and / or

[0022] The thickness of the insulating film in the thickness direction of the coil module is 0.1mm-0.8mm.

[0023] In one of the embodiments, the distance between the edge of the coil module and the edge of the metal coil is 0.1mm-3mm; or

[0024] The distance between the edge of the supporting diaphragm and the edge of the metal coil is 0.1mm-5mm.

[0025] In one of the embodiments, the metal coil comprises an inner coil metal trace, an outer coil metal trace and a connecting metal trace, two ends of the connecting metal trace are connected to the inner coil metal trace and the outer coil metal trace respectively;

[0026] The end of the inner coil metal trace close to the connecting metal trace is formed into a first outer connecting end after winding around the supporting diaphragm at least one time, and the end of the outer coil metal trace close to the connecting metal trace is formed into a second outer connecting end after winding around the supporting diaphragm at least one time; wherein,

[0027] The diameter of the outer coil metal trace is greater than the diameter of the inner coil metal trace.

[0028] The application also provides an electronic device comprising a housing and the coil module as mentioned in any of the above embodiments, the housing comprises a top surface, the top surface of the housing is attached to the insulating film and is integrally formed with the coil module.

[0029] In one of the embodiments, the coil module is fixed to the housing, and the housing at least partially wraps at least part of the peripheral edge of the coil module.

[0030] The technical scheme provided by the embodiments of the application can include the following beneficial effects:

[0031] As can be seen from the above embodiments, the coil module of the application comprises an insulating film and at least one diaphragm assembly. The diaphragm assembly comprises a supporting diaphragm and a metal coil located thereon. The supporting diaphragm comprises a first surface and a second surface oppositely arranged along the thickness direction, and the first surface is farther away from the insulating film than the second surface. The second surface is provided with a film layer region, and a metal layer is prepared in the film layer region to form the metal coil. The first surface and the second surface have the same curvature. The application forms a diaphragm assembly by preparing a metal coil on the supporting diaphragm that can adapt to and fit the curvature of the supporting diaphragm, and then the diaphragm assembly is attached to the insulating film to form a coil module. This arrangement can greatly reduce the distance between the metal coil and the outer surface of the coil module, improve the signal strength and transmission efficiency, and effectively improve the induction performance of the electronic device in which the coil module is located.

[0032] Optimizing the coil layout, i.e. placing multiple coils on the same side of the substrate and connecting the coils through a metal connecting bridge, can effectively reduce the number of coil layers, reduce the production cost of the coil module, and the coil layout on the same side can reduce signal loss and improve antenna performance and efficiency, effectively solving the problems of high cost, large thickness and large signal loss of the traditional antenna coil stacking structure.

[0033] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application, as claimed. BRIEF DESCRIPTION OF DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments description will be briefly introduced. Obviously, the drawings in the description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained based on these drawings without creative labor.

[0035] Figure 1 A structure schematic view of a coil module provided in an embodiment of the present application in a perspective view.

[0036] Figure 2 Another structure schematic view of a coil module provided in an embodiment of the present application in a perspective view.

[0037] Figure 3 Still another structure schematic view of a coil module provided in an embodiment of the present application in a perspective view.

[0038] Figure 4 A partial structure schematic view of a coil module provided in an embodiment of the present application in another perspective view.

[0039] Figure 5 A structure schematic view of a diaphragm assembly provided in an embodiment of the present application in a perspective view.

[0040] Figure 6 A structure schematic view of another diaphragm assembly provided in an embodiment of the present application in a perspective view.

[0041] REFERENCE SIGNS:

[0042] 1, coil module; 110a, first surface; 110b, second surface; 10, insulating film; 101, third accommodation hole; 102, fourth accommodation hole; 103, fifth accommodation hole; 104, sixth accommodation hole; 11, diaphragm assembly; 110, supporting diaphragm; 111, metal coil; 12, first coil; 120, first end; 121, second end; 13, second coil; 130, third end; 131, fourth end; 14, inner diaphragm; 15, outer diaphragm; 112, inner coil metal wire; 113, connecting metal wire; 114, outer coil metal wire; 2, shell; 201, first accommodation hole; 202, second accommodation hole. DETAILED DESCRIPTION

[0043] The exemplary embodiments will be described in detail herein with reference to the accompanying drawings. In the following description, like reference numerals refer to like elements throughout the description. It will be readily apparent to those skilled in the art that various modifications, changes, and adaptations can be made in the present disclosure, and the associated methods, apparatuses, and / or systems described herein, without departing from the scope of the present disclosure. For example, the order in which operations are described is not as important as claimed dependencies and can be performed in an order different than described without departing from the scope of the present disclosure. In addition, the description can omit well-known features to improve clarity and conciseness. The ways described in the following exemplary embodiments do not represent all ways consistent with the present disclosure. Rather, they are merely examples of apparatuses consistent with some aspects of the present disclosure, as detailed in the appended claims.

[0044] As described in the background, for the necessity of product structure stability and function realization, it is necessary to attach the NFC (Near Field Communication) coil on a certain number and thickness of structural shell parts, and interact with external reading devices through the outer surface of the structural shell parts. In order to meet the needs of aesthetics and experience, for example, the NFC sensing area of a certain electronic product, the structural shell part adopts an arc-shaped appearance design.

[0045] However, such a setting affects the performance of the NFC coil to some extent. Due to the limitation of the arc-shaped design and the existence of the necessary structural shell thickness, the spatial layout of the NFC coil inside the product is obviously compressed, resulting in a relatively large distance between the NFC coil and the outer surface of the structural shell part. The performance of NFC technology depends largely on the proximity between the coil and the external reading device or target object. The increase in distance will significantly weaken the signal strength and transmission efficiency, thereby restricting the overall NFC performance experience of the product, so that users may encounter problems such as slow sensing, small recognition range, and unstable data transmission when using NFC functions, which seriously hinders the competitiveness and user experience of the product in NFC application scenarios.

[0046] Based on this, with reference to Figure 1 The present application proposes a coil module 1 fixed on a shell 2. The coil module 1 comprises an insulating film 10 and at least one diaphragm assembly 11 stacked along the thickness direction. The diaphragm assembly 11 is composed of a metal coil 111 and a support diaphragm 110, and the metal coil 111 is located on the side of the support diaphragm 110 close to the insulating film 10. The support diaphragm 110 is provided with a first surface 110a and a second surface 110b, the first surface 110a is farther away from the insulating film 10 than the second surface 110b, and the two surfaces have the same curvature.

[0047] The metal coil 111 is formed by plating a metal layer in the film layer area of the second surface 110b, for example, by using a physical vapor deposition (PVD) technique to uniformly deposit metal atoms on the second surface 110b of the supporting film 110 to form a thin and uniform metal layer, thereby achieving the function of an antenna and being used as an NFC coil. The shell 2 is used to increase the structural stability of the product.

[0048] Since the first surface 110a and the second surface 110b of the supporting film 110 have the same curvature, and the metal coil 111 can conform to the curvature of the second surface 110b, the distance between the metal coil 111 and the first surface 110a of the supporting film 110 is effectively reduced. The first surface 110a of the supporting film 110 located at the outermost layer in the coil module 1 is generally used to interact with an external reading device, and therefore, this design can reduce the distance between the metal coil 111 and an external reading device or a target object, thereby effectively improving the signal strength and transmission efficiency of the coil module 1.

[0049] It should be noted that the insulating film 10 in the present application is only used to achieve insulation between the film assembly 11 and the shell 2. When the coil module 1 includes multiple film assemblies 11, the supporting film 110 located in the middle part not only plays a supporting role for the metal coil 111, but also plays an insulating role between the metal coils 111.

[0050] Specifically, continuing to refer to Figure 1 In the present embodiment, when the coil module 1 includes two groups of film assemblies 11, the multiple groups of film assemblies 11 are fixedly connected in opposite directions along the thickness. The supporting film 110 close to the insulating film 10 can be understood as an inner film 14, and the metal coil 111 close to the insulating film 10 is a first coil 12, the supporting film 110 away from the insulating film 10 can be understood as an outer film 15, and the metal coil 111 away from the insulating film 10 is a second coil 13. At this time, the coil module 1 includes the insulating film 10, the first coil 12, the inner film 14, the second coil 13, and the outer film 15 which are sequentially stacked along the thickness direction.

[0051] It can be understood that the second surface 110b of the inner film 14 is used to prepare the first coil 12 to achieve the supporting effect of the metal coil 111, and the first surface 110a of the inner film is used to conform to the second surface 110b of the outer film 15 to achieve insulation between the first coil 12 and the second coil 13 located on the outer film 15.

[0052] Further, taking the coil including two groups of film assemblies 11 as an example, the preparation process of the coil module 1 is briefly described.

[0053] The first coil 12 is prepared on the inner diaphragm 14 to form a first diaphragm assembly 11. The second coil 13 is prepared on the outer diaphragm 15 to form a second diaphragm assembly 11. Then the second surface 110b of the outer diaphragm (the surface on which the second coil 13 is prepared) is bonded to the first surface 110a of the inner diaphragm 14 to form a whole. Then the second surface 110b of the whole, i.e. the inner diaphragm 14, is bonded to the insulating film 10. After that, the coil module 1 in the preset form can be obtained. Of course, in other embodiments, the coil module 1 in the final form can be obtained without cutting and / or pre-shrinking, and can be flexibly adjusted according to actual needs.

[0054] It should be particularly pointed out that the coil module 1 of the present application is not limited to containing two diaphragm assemblies 11, but can also contain more than two diaphragm assemblies 11. When the coil module 1 contains multiple diaphragm assemblies 11, the structure design and preparation process can be extended and optimized with reference to the case of containing two diaphragm assemblies 11. For example, for the case of containing three diaphragm assemblies 11, the second surface 110b of each outer diaphragm 15 can be sequentially bonded to the first surface 110a of the adjacent inner diaphragm, and then the second surface 110b of the innermost diaphragm 14 is bonded to the insulating film 10, and the first surface 110a of the diaphragm in the outermost layer is used to interact with the external reading device.

[0055] In some embodiments, the shell 2 and the coil module 1 are integrally formed. Preferably, the shell 2 and the coil module 1 are integrally formed by an injection molding process.

[0056] Specifically, first, the coil module 1 in the preset form is prepared by the foregoing steps. Then the coil module 1 in the preset form is heated and pre-shrunk, and then the pre-shrunk coil module 1 in the preset form is formed by a high-pressure machine or a copper mold, and the waste after forming is cut off to form the coil module 1 in the final form. After that, the prepared coil module 1 in the final form is placed in an injection mold. The injection molding process is started, so that the shell 2 material (such as plastic) is melted at high temperature and then injected into the mold. Finally, the molten material wraps the coil module 1 and cools and solidifies, so that it can be combined with the coil module 1 to form an integrated structure. The shell 2 not only provides support for the metal coil 111, but also enhances the overall structural stability of the product. At the same time, this scheme has low cost and simple assembly.

[0057] In some embodiments, the coil module 1 further comprises an external connecting piece, one end of the external connecting piece is arranged through the shell 2 and electrically connected with the coil module 1, and the other end of the external connecting piece is electrically connected with an external device.

[0058] Specifically, the external device can be one or more of an NFC controller, a power management module, a signal processing unit, and the like. By connecting the coil module to these external devices, a complete NFC control module can be constructed.

[0059] Specifically, the external connection member can be one or more of a cable, a metal spring, or a connector.

[0060] In some embodiments, when the coil module 1 includes only one diaphragm assembly 11, the metal coil 111 includes a first external connection end and a second external connection end, the external connection member includes a first sub-external connection member and a second sub-external connection member, the first sub-external connection member is used to connect the first external connection end of the metal coil 111 and the external device, and the second sub-external connection member is used to connect the second external connection end and the external device, so as to realize the electrical connection between the coil module 1 and the external circuit and ensure the normal transmission of signals and power.

[0061] Specifically, referring to Figure 3 , the housing 2 is provided with a first clearance hole 201 and a second clearance hole 202, and the insulating film 10 is provided with a third clearance hole 101 and a fourth clearance hole 102. The first clearance hole 201 and the third clearance hole 101 are arranged correspondingly in the thickness direction of the housing 2, and the second clearance hole 202 and the fourth clearance hole 102 are arranged correspondingly in the thickness direction of the housing 2.

[0062] The first sub-external connection member is electrically connected to the first external connection end of the metal coil 111 after being sequentially threaded through the first clearance hole 201 and the third clearance hole 101, and the second sub-external connection member is electrically connected to the second external connection end of the metal coil 111 after being sequentially threaded through the second clearance hole 202 and the fourth clearance hole 102.

[0063] In one embodiment, the first external connection member and the second sub-external connection member can be configured as a cable, one end of which is welded or crimped to the external connection end of the metal coil 111 after passing through the corresponding clearance holes of the housing 2 and the insulating film 10, and the other end is connected to the external device, such as an NFC controller.

[0064] In some embodiments, when the coil module 1 includes two diaphragm assemblies 11, the inner metal coil 111 and the outer metal coil 111 are connected in series to form an open first coil winding. Among them, as described above, the inner metal coil 111 is the first coil 12, and the outer metal coil 111 is the second coil 13. Therefore, this embodiment can be understood as the first coil 12 and the second coil 13 being connected in series.

[0065] The external connection member includes a first sub-external connection member and a second sub-external connection member, one end of the first coil winding is a first external connection end, and the other end is a second external connection end. The first external connection end is electrically connected to the external device through the first sub-external connection member, and the second external connection end is electrically connected to the external device through the second sub-external connection member.

[0066] In this embodiment, the first coil 12 and the second coil 13 are connected in series to form a complete electrical circuit with external devices. This arrangement can enhance signal strength, improve frequency stability, optimize circuit design, save space, and have flexibility and scalability to adapt to various devices and application scenarios.

[0067] Specifically, referring to Figure 2 and Figure 4 , the shell 2 is provided with a first accommodation hole 201 and a second accommodation hole 202, the insulating film 10 is provided with a third accommodation hole 101 corresponding to the first accommodation hole 201 and a fourth accommodation hole 102 corresponding to the second accommodation hole 202, and the inner membrane piece 14 is provided with a fifth accommodation hole 103 corresponding to the third accommodation hole 101, which is used to electrically connect the first coil 12 and the second coil 13.

[0068] In one embodiment, the fifth accommodation hole 103 is filled with a metal connecting part, and the first coil 12 and the second coil 13 are connected in series through the metal connecting part, and the first external connecting part and the second external connecting part only pass through the shell 2 and the insulating film 10.

[0069] Specifically, the fifth accommodation hole 103 is filled with a metal connecting part, which can be formed by electroplating, sputtering or other metal deposition processes, and is manufactured synchronously with the first coil 12 without additional complex assembly steps. The specific process is as follows: first, prepare the second coil 13 on the outer membrane piece 15 to form the first membrane piece assembly 11. Open the fifth accommodation hole 103 on the inner membrane piece 14; then prepare the first coil 12 to form the metal connecting part synchronously. Of course, in other embodiments, it can also be formed by a separate process.

[0070] Specifically, the first coil 12 includes a first end 120 and a second end 121, and the second coil 13 includes a third end 130 and a fourth end 131. The first end 120 and the third end 130 are arranged in correspondence along the thickness direction, and the second end 121 and the fourth end 131 are arranged in correspondence. Among them, the first end 120 of the first coil 12 and the third end 130 of the second coil 13 are electrically connected through the fifth accommodation hole 103, and one of the remaining second end 121 of the first coil 12 and the fourth end 131 of the second coil 13 serves as the first external connecting end of the first coil winding, and the other serves as the second external connecting end.

[0071] Further, the first sub-external connecting part is electrically connected to the first external connecting end of the first coil winding after passing through the first accommodation hole 201, the third accommodation hole 101 in sequence, and the second sub-external connecting part is electrically connected to the second external connecting end of the first coil winding after passing through the second accommodation hole 202 and the fourth accommodation hole 102 in sequence.

[0072] In another embodiment, the fifth let-hole 103 is not filled with a metal connecting part, and the first coil 12 and the second coil 13 are electrically connected only through the first sub-external connecting part, i.e., the first sub-external connecting part needs to pass through the shell 2, the insulating film 10, and the inner film 14.

[0073] Specifically, with continued reference to Figure 2 , the first sub-external connecting part is arranged through the first let-hole 201, the third let-hole 101, and the fifth let-hole 103 in sequence, for electrically connecting the first coil 12 and the second coil 13.

[0074] In some embodiments, when the coil module 1 includes two groups of film assembly 11, the first coil 12 and the second coil 13 are connected in parallel to form a closed second coil winding. The second coil winding includes a first external connecting point and a second external connecting point, the first external connecting point is electrically connected with an external device through the first sub-external connecting part, and the second external connecting point is electrically connected with an external device through the second sub-external connecting part.

[0075] Specifically, with reference to Figure 1 and Figure 4 , the shell 2 is provided with a first let-hole 201 and a second let-hole 202, the insulating film 10 is provided with a third let-hole 101 corresponding to the first let-hole 201 and a fourth let-hole 102 corresponding to the second let-hole 202, and the inner film 14 is provided with a fifth let-hole 103 corresponding to the third let-hole 101 and a sixth let-hole 104 corresponding to the fourth let-hole 102.

[0076] In one embodiment, the fifth let-hole 103 and the sixth let-hole 104 are both filled with a metal connecting part, and the first coil 12 and the second coil 13 are electrically connected in parallel through the metal connecting part, and the first external connecting part and the second sub-external connecting part only need to pass through the shell 2 and the insulating film 10.

[0077] Specifically, the fifth let-hole 103 and the sixth let-hole 104 are filled with a metal connecting part, which can be formed by electroplating, sputtering, or other metal deposition processes, and is manufactured synchronously with the first coil 12, without the need for additional complex assembly steps. The specific process is as follows: first, the second coil 13 is prepared on the outer film 15 to form the first film assembly 11; the fifth let-hole 103 and the sixth let-hole 104 are respectively formed on the inner film 14; and then the first coil 12 is prepared to synchronously form the metal connecting part.

[0078] Specifically, as described in the above embodiments, the first coil 12 includes a first end 120 and a second end 121, and the second coil 13 includes a third end 130 and a fourth end 131. The first end 120 and the third end 130 are arranged in correspondence along the thickness direction, and the second end 121 and the fourth end 131 are arranged in correspondence. The first end 120 of the first coil 12 and the third end 130 of the second coil 13 are electrically connected through the fifth accommodation hole 103, and the second end 121 of the first coil 12 and the fourth end 131 of the second coil 13 are electrically connected through the sixth accommodation hole 104. Further, the first end 120 of the first coil 12 is taken as a first external connection point, and the second end 121 of the first coil 12 is taken as a second external connection point.

[0079] The first sub-external connection member is sequentially arranged through the first accommodation hole 201 and the third accommodation hole 101, and is electrically connected with the first external connection point of the winding of the second coil 13. The second sub-external connection member is sequentially arranged through the second accommodation hole 202 and the fourth accommodation hole 102, and is electrically connected with the second external connection point of the winding of the second coil 13.

[0080] In another embodiment, the fifth accommodation hole 103 and the sixth accommodation hole 104 are not filled with a metal connection part, and the first coil 12 and the second coil 13 are electrically connected through the first sub-external connection member and the second sub-external connection member respectively, that is, the first sub-external connection member and the second sub-external connection member not only pass through the shell 2 and the insulating film 10, but also pass through the inner film sheet 14.

[0081] Specifically, the first sub-external connection member is sequentially arranged through the first accommodation hole 201 and the third accommodation hole 101, and is further arranged through the fifth accommodation hole 103. The second sub-external connection member is sequentially arranged through the second accommodation hole 202 and the fourth accommodation hole 102, and is further arranged through the sixth accommodation hole 104, for electrically connecting the first coil 12 and the second coil 13.

[0082] In some embodiments, the distance between the edge of the coil module 1 and the edge of the metal coil 111 is set to 0.1mm-3mm, and preferably, the thickness of the insulating film 10 is 0.15mm. Here, the edge of the coil module 1 can refer to the edge of the supporting film sheet 110 or the edge of the insulating film 10, and different edge definitions directly affect the distribution of electric field and magnetic field and the optimization of the performance of the electromagnetic device.

[0083] Further, referring to Figure 5 or Figure 6 , the distance d1 between the edge of the supporting film sheet 110 and the edge of the metal coil 111 is 0.1mm-5mm. Preferably, the thickness of the supporting film sheet 110 is 0.15mm.

[0084] A certain safety distance is provided between the metal coil 111 and the edge of the coil module 1, which can effectively control the distribution of the electromagnetic field, prevent the electric field from being too concentrated to cause breakdown, and provide necessary space for heat dissipation of the device. In addition, this precise distance setting helps to reduce electromagnetic interference and improve the stability and reliability of the device.

[0085] In some embodiments, referring to Figure 5 or Figure 6 , the metal coil 111 includes an inner coil metal trace 112, an outer coil metal trace 114, and a connecting metal trace 113, both ends of the connecting metal trace 113 being connected to the inner coil metal trace 112 and the outer coil metal trace 114, respectively.

[0086] The end of the inner coil metal trace 112 close to the connecting metal trace 113 is formed into a first outer connection end after winding at least one turn around the supporting diaphragm 110, and the end of the outer coil metal trace 114 close to the connecting metal trace 113 is formed into a second outer connection end after winding at least one turn around the supporting diaphragm 110. The diameter of the outer coil metal trace 114 is greater than that of the inner coil metal trace 112.

[0087] It can also be understood that, continuing to refer to Figure 5 and Figure 6 , both the first coil 12 and the second coil 13 can be prepared as double-layer metal traces. This double-layer metal trace design can increase the effective length and area of the coil, and improve the inductance and signal receiving and transmission capacity of the antenna. At the same time, the double-layer metal trace can shield external electromagnetic interference to some extent, enhance the anti-interference performance of the antenna, and ensure the stability of signal transmission.

[0088] The application also provides an electronic device comprising a shell and the above coil module, the shell being integrally formed with the coil module.

[0089] In some embodiments, the coil module is fixed to the shell, and the shell at least partially wraps at least part of the peripheral edge of the coil module.

[0090] This arrangement can improve mechanical stability, prevent displacement and shaking of the coil module during operation, and even if the device is subjected to external impact, it can also act as a buffer to protect the integrity of the coil module structure. Secondly, it can play an electromagnetic shielding role, block part of the electromagnetic field from radiating outward, prevent external electromagnetic interference, and ensure stable operation of the device. Finally, it can prevent direct contact of the human body with the charged edge of the coil module, reduce the risk of electric shock, and at the same time, in harsh environments, it can also prevent liquid or corrosive gas from contacting the edge of the coil module, improving the safety of the device.

[0091] In the detailed description above, reference is made to the accompanying drawings, which form a part hereof, and in which are shown by way of illustration specific aspects in which the disclosure can be practiced. In this regard, directional terminology, such as "thickness," "upper," "lower," "top," "bottom," "inner," "outer," and the like, is used with reference to the orientation of the Figure(s) being described. Because components of the described devices can be positioned in a number of different orientations, the directional terminology can be used for purposes of explanation without

[0092] It is to be understood that the features of the various aspects of the disclosure described herein can be combined with each other, unless specifically noted otherwise. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items; similarly, "at least one of' includes any and all combinations of one or more of the associated listed items.

[0093] It should be understood that, unless otherwise specifically stated and limited, the terms "joined," "attached," "mounted," "connected," "linked," "fixed" and the like, as used herein, are to be construed broadly, for example, as either fixed connections, or as removable connections, or as integral connections; as either mechanical connections, or as electrical connections, or as communicative connections with each other; as either direct connections, or as indirect connections via intervening medium; as internal connections within two elements, or as interactive relationships between two elements, unless otherwise specifically noted and limited. The specific meaning of the above terms in the present context can be understood by those of ordinary skill in the art according to the specific circumstances.

[0094] Although terms such as "first," "second," and "third" can be used herein to describe various elements, components, regions, layers or sections, these elements, components, regions, layers or sections should not be limited by these terms. Instead, these terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. As such, a first element, component, region, layer or section referred to in the examples described herein can also be called a second element, component, region, layer or section without departing from the teachings of the examples. In addition, the terms "first," "second," are used only for descriptive purposes and should not be construed as indicating or implying relative importance or an indicated number of the specified technical features. Thus, features defined with "first," "second" can explicitly or implicitly include at least one of the features. In the description herein, the meaning of "a plurality of' is at least two, for example, two, three, etc., unless specifically limited otherwise.

[0095] Any technical features in the above embodiments can be combined, and for the sake of brevity, not all possible combinations are described, however, any combination of the technical features is considered to be within the scope of the present specification.

Claims

1. A coil module for securing to a housing, characterized by, The coil module comprises an insulating film and at least one diaphragm assembly stacked along the thickness direction; the diaphragm assembly comprises a metal coil and a support diaphragm, and the metal coil is located on the side of the support diaphragm close to the insulating film; wherein, The support diaphragm comprises a first surface and a second surface arranged oppositely along the thickness direction, and the first surface is farther away from the insulating film than the second surface; a film layer region is arranged on the second surface, and a metal layer is prepared in the film layer region to form the metal coil; the first surface and the second surface have the same curvature.

2. The coil module of claim 1, wherein, The coil module further comprises an external connecting member, one end of the external connecting member is arranged through the shell and electrically connected with the coil module, and the other end of the external connecting member is electrically connected with an external device.

3. The coil module of claim 2, wherein, When the coil module comprises only one diaphragm assembly, the metal coil comprises a first external connecting end and a second external connecting end, the external connecting member comprises a first sub-external connecting member and a second sub-external connecting member, the first sub-external connecting member is used for connecting the first external connecting end of the metal coil and an external device, and the second sub-external connecting member is used for connecting the second external connecting end and an external device.

4. The coil module of claim 3, wherein, First and second accommodation holes are arranged on the shell, and third and fourth accommodation holes are arranged on the insulating film; the first and third accommodation holes are arranged correspondingly along the thickness direction of the shell, and the second and fourth accommodation holes are arranged correspondingly along the thickness direction of the shell; wherein, The first sub-external connecting member is arranged through the first and third accommodation holes in sequence and electrically connected with the first external connecting end of the metal coil, and the second sub-external connecting member is arranged through the second and fourth accommodation holes in sequence and electrically connected with the second external connecting end of the metal coil.

5. The coil module of claim 2, wherein, When the coil module comprises at least two diaphragm assemblies, any two adjacent diaphragm assemblies are fixedly connected along the thickness direction; wherein, the metal coil close to the shell is referred to as an inner metal coil, the metal coil far away from the shell is referred to as an outer metal coil, the support diaphragm close to the shell is referred to as an inner diaphragm, and the support diaphragm far away from the shell is referred to as an outer diaphragm; the inner metal coil and the outer metal coil are connected in series to form an open first coil winding, and the external connecting member comprises a first sub-external connecting member and a second sub-external connecting member. One end of the first coil winding is a first external connecting end, and the other end is a second external connecting end; the first external connecting end is electrically connected with an external device through the first sub-external connecting member, and the second external connecting end is electrically connected with an external device through the second sub-external connecting member.

6. The coil module of claim 5, wherein, First and second accommodation holes are arranged on the shell, and third and fourth accommodation holes are arranged on the insulating film; the first and third accommodation holes are arranged correspondingly along the thickness direction of the shell, and the second and fourth accommodation holes are arranged correspondingly along the thickness direction of the shell; wherein, The first and third accommodation holes are arranged correspondingly along the thickness direction of the shell, and the second and fourth accommodation holes are arranged correspondingly along the thickness direction of the shell; wherein, The first sub-external connecting member is arranged through the first and third accommodation holes in sequence and electrically connected with the first external connecting end of the metal coil, and the second sub-external connecting member is arranged through the second and fourth accommodation holes in sequence and electrically connected with the second external connecting end of the metal coil. When the coil module comprises at least two diaphragm assemblies, any two adjacent diaphragm assemblies are fixedly connected along the thickness direction; wherein, the metal coil close to the shell is referred to as an inner metal coil, the metal coil far away from the shell is referred to as an outer metal coil, the support diaphragm close to the shell is referred to as an inner diaphragm, and the support diaphragm far away from the shell is referred to as an outer diaphragm; the inner metal coil and the outer metal coil are connected in series to form an open first coil winding, and the external connecting member comprises a first sub-external connecting member and a second sub-external connecting member. One end of the first coil winding is a first external connecting end, and the other end is a second external connecting end; the first external connecting end is electrically connected with an external device through the first sub-external connecting member, and the second external connecting end is electrically connected with an external device through the second sub-external connecting member. First and second accommodation holes are arranged on the shell, and third and fourth accommodation holes are arranged on the insulating film; the first and third accommodation holes are arranged correspondingly along the thickness direction of the shell, and the second and fourth accommodation holes are arranged correspondingly along the thickness direction of the shell; wherein, The first and third accommodation holes are arranged correspondingly along the thickness direction of the shell, and the second and fourth accommodation holes are arranged correspondingly along the thickness direction of the shell; wherein, The first sub-external connecting member is arranged through the first and third accommodation holes in sequence and electrically connected with the first external connecting end of the metal coil, and the second sub-external connecting member is arranged through the second and fourth accommodation holes in sequence and electrically connected with the second external connecting end of the metal coil. The first sub-external connecting piece is electrically connected with the first external terminal of the first coil winding after being sequentially arranged in the first and third accommodating holes, and the second sub-external connecting piece is electrically connected with the second external terminal of the first coil winding after being sequentially arranged in the second and fourth accommodating holes.

7. The coil module of claim 6, wherein, The first sub-external connecting piece is further arranged in the fifth accommodating hole after being sequentially arranged in the first and third accommodating holes, and is used for electrically connecting the inner metal coil and the outer metal coil; or The coil module further comprises a metal connecting part which is arranged in the fifth accommodating hole and is used for electrically connecting the inner metal coil and the outer metal coil.

8. The coil module of claim 3, wherein, When the coil module comprises at least two groups of diaphragm assemblies, any two adjacent groups of diaphragm assemblies are fixedly connected in the thickness direction; wherein, the metal coil close to the shell is referred to as an inner metal coil, the metal coil far away from the shell is referred to as an outer metal coil, the diaphragm close to the shell is referred to as an inner diaphragm, and the diaphragm far away from the shell is referred to as an outer diaphragm; the inner metal coil and the outer metal coil are connected in parallel to form a closed second coil winding, and the external connecting piece comprises a first sub-external connecting piece and a second sub-external connecting piece; The second coil winding comprises a first external connecting point and a second external connecting point, the first external connecting point is electrically connected with an external device through the first sub-external connecting piece, and the second external connecting point is electrically connected with an external device through the second sub-external connecting piece.

9. The coil module of claim 8, wherein, The shell is provided with a first accommodating hole and a second accommodating hole, the insulating film is provided with a third accommodating hole corresponding to the first accommodating hole and a fourth accommodating hole corresponding to the second accommodating hole, the inner diaphragm is provided with a fifth accommodating hole corresponding to the third accommodating hole and a sixth accommodating hole corresponding to the fourth accommodating hole; The first sub-external connecting piece is electrically connected with the first external connecting point of the second coil winding after being sequentially arranged in the first and third accommodating holes, and the second sub-external connecting piece is electrically connected with the second external connecting point of the second coil winding after being sequentially arranged in the second and fourth accommodating holes.

10. The coil module of claim 9, wherein, The first sub-external connecting piece is sequentially arranged in the first, third and fifth accommodating holes, and the second sub-external connecting piece is sequentially arranged in the second, fourth and sixth accommodating holes, and is used for electrically connecting the inner metal coil and the outer metal coil; or The coil module further comprises a metal connecting part which is arranged in the fifth and sixth accommodating holes and is used for electrically connecting the inner metal coil and the outer metal coil.

11. The coil module of claim 1, wherein, The thickness of the diaphragm in the thickness direction of the coil module is 0.1mm-0.8mm; and / or The thickness of the insulating film in the thickness direction of the coil module is 0.1mm-0.8mm.

12. The coil module of claim 1, wherein, The distance between the edge of the coil module and the edge of the metal coil is 0.1mm-3mm; or The distance between the edge of the diaphragm and the edge of the metal coil is 0.1mm-5mm.

13. The coil module of claim 1, wherein, The metal coil comprises an inner metal trace, an outer metal trace and a connecting metal trace, two ends of the connecting metal trace are connected with the inner metal trace and the outer metal trace respectively; One end of the inner metal trace close to the connecting metal trace is formed into a first external connection end after winding around the supporting diaphragm at least one time, and one end of the outer metal trace close to the connecting metal trace is formed into a second external connection end after winding around the supporting diaphragm at least one time; wherein, The diameter of the outer metal trace is greater than the diameter of the inner metal trace.

14. An electronic device, comprising: The coil module comprises a shell and a coil module as claimed in any one of claims 1-13; the shell comprises a top surface, the top surface of the shell is attached to an insulating film and is integrally formed with the coil module.

15. The electronic device of claim 14, wherein, The coil module is fixed to the shell, and the shell at least partially wraps at least part of the peripheral edge of the coil module.

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