Patent Description:
Embodiments of this application relate to the field of terminal technologies, and in particular, to an electronic device.

With the explosive growth of electronic devices such as smartphones or tablet computers (portable equipment, PADs), electronic devices have more functions. For example, an electronic device has a wireless charging function or a near field communication (Near Field Communication, NFC) function. The wireless charging function allows the electronic device to be charged without being connected to a charging cable, so that a charging process of the electronic device is simple and convenient. The near field communication function allows users to pay or unlock a door using a mobile phone without taking out a physical card when taking public transportation or opening the door, thereby effectively improving convenience. In an electronic device, a corresponding conductive coil needs to be arranged to implement the wireless charging function or the near field communication function. In the related art, the conductive coil is formed by winding a copper wire. The electronic device includes a housing, a mainboard, and a mainboard bracket. The mainboard bracket is arranged between the mainboard and the housing. The conductive coil that is arranged separately needs to be bonded to the mainboard bracket, so as to be fastened. The conductive coil is electrically connected to the mainboard. A process of connecting the wire coil to the mainboard bracket is complex, the connection between the wire coil and the mainboard bracket has low reliability, which causes an adverse effect on normal use of the conductive coil.

Technologies representing the field of the present invention include <CIT>, <CIT>, <CIT>, <CIT>, <CIT>, <CIT>, and <CIT>.

<CIT> discloses a contactless power transmission device and an electronic device having the same. The contactless power transmission device includes: a flexible substrate; a coil unit formed in the flexible substrate and including a coil part formed to have a wiring pattern form and having a plurality of coil strands connected in parallel with each other to thereby form a single coil pattern; and a circuit unit formed in the flexible substrate and electrically connected to the coil unit.

<CIT> discloses an NFC antenna comprising a carrier, a coil structure, an ink layer and a conductive metal layer. The coil structure, the ink layer, and the conductive metal layer are sequentially printed directly on the carrier by a pad-printing process. The coil structure comprises a coil body and two feedpoints, wherein the coil body comprises a multi-turn coil surrounded by a first feedpoint and a second feedpoint. The area between the end of the inner coil and the second feedpoint is provided with the ink layer, the area where the ink layer is located covers an intermediate multi-turn coil for insulating the intermediate multi-turn coil, and the area between the end of the inner coil and the second feedpoint is provided with the ink layer. The area between the end of the innermost coil and the second feedpoint is provided with the ink layer, and the area where the ink layer is located covers the intermediate multi-turn coil for insulating the intermediate multi-turn coil; the conductive metal layer is provided on the ink layer, with one end connecting to the end of the innermost coil and the other end connecting to the second feedpoint.

<CIT> discloses a wireless power antenna whose relevant features are disclosed in <CIT>.

<CIT> A1discloses a wireless charging back shell assembly and an electronic device. The wireless charging back shell assembly comprises a back shell, a wireless charging coil, a first bonding pad, a second bonding pad, a first FPC transmission line and a second FPC transmission line, wherein the wireless charging coil is formed on the surface of the back shell by means of a laser engraving process; the wireless charging coil is provided with an inner port, which is located on the inner side of the coil, and an outer port, which is located on the outer side of the coil; and the inner port is electrically connected to the first bonding pad by means of the first FPC transmission line, and the outer port is electrically connected to the second bonding pad by means of the second FPC transmission line. In the wireless charging back shell assembly, the wireless charging coil is formed on the surface of the back shell by means of the laser engraving process.

<CIT> discloses a wireless charging structure whose relevant features are disclosed in <CIT>.

<CIT> discloses a wireless charging structure whose relevant features are disclosed in <CIT>, further characterized by having a shell structure disposed around a coil of the wireless charging structure.

<CIT> discloses a wireless charging structure whose relevant features are disclosed in <CIT>, further characterized by having a groove component that allows air to cool a heat dissipation component of the charging structure.

To solve the problem of reducing the possibility that a conductive coil cannot be used normally due to low reliability of a connection between a wire coil and a mainboard bracket, embodiments of this application provide an electronic device according to the enclosed independent claim <NUM>. Advantageous features of the present invention are defined in the corresponding subclaims.

In the following, parts of the description and drawings referring to embodiments, which are not covered by the claims, are not presented as embodiments of the invention but as examples useful for understanding the invention.

A firs aspect of this application provides an electronic device. The electronic device includes at least a housing, a mainboard, a conductive coil, and a conductive adapter. The housing includes an inner surface and an outer surface provided opposite to each other. The mainboard is arranged on the inner surface. The conductive coil is arranged on the inner surface and is integrally arranged with the housing. The conductive coil includes a winding portion, an outer connection terminal, and an inner connection terminal. In a radial direction of the winding portion, the mainboard is located at an outer side of the winding portion. The outer connection terminal is connected to the winding portion and is located at the outer side of the winding portion. The outer connection terminal is electrically connected to the mainboard. The inner connection terminal is connected to the winding portion and is located on an inner side of the winding portion. The conductive adapter is electrically connected to the mainboard and the inner connection terminal.

The electronic device in the embodiments of this application includes a housing and a conductive coil that are integrally arranged. The conductive coil is directly connected to the housing, so that the conductive coil and the housing form an integral structure. The conductive coil and the housing are connected by a large force, and have high connection reliability. The conductive coil does not easily swing relative to the housing to be disconnected from the housing, which helps to reduce the possibility that the conductive coil cannot be used normally due to low reliability of a connection between a wire coil and a mainboard bracket. Because the conductive coil is connected to the housing so as to be fastened, the conductive coil does not need to be connected to the mainboard bracket or an auxiliary board bracket, so that there is no need to connect the conductive coil to the mainboard bracket or the auxiliary board bracket, and assembly processes are reduced.

In a possible implementation, a conductive layer is formed on the housing by using a conductive material, so that the conductive layer forms the conductive coil.

In a possible implementation, a conductive layer is formed on the housing by using a conductive material, and the conductive layer is patterned to form the conductive coil.

In a possible implementation, the conductive adapter is located on a side of the conductive coil facing away from the inner surface. By arranging the conductive adapter on the side of the conductive coil facing away from the inner surface of the housing, a complete conductive coil can be formed on the housing by using a conductive material in advance, so that the conductive coil is connected to the housing in all regions, thereby ensuring the connection between the conductive coil and the housing to be stable and reliable. The conductive adapter is then arranged on the side of the conductive coil facing away from the inner surface of the housing, to reduce the difficulty of arranging the conductive adapter.

In a possible implementation, the conductive coil has an increased thickness at the inner connection terminal. The thickness of the inner connection terminal is increased, so that a region of the inner connection terminal facing away from the inner surface of the housing can be higher than the winding portion. In this way, when the conductive adapter is connected to the region of the inner connection terminal facing away from the inner surface, a gap may be reserved between the conductive adapter and the winding portion, which helps to reduce the possibility of positional interference between the conductive adapter and the winding portion, and also helps to reduce the possibility of short-circuiting between the conductive adapter and the winding portion.

In a possible implementation, the conductive coil has an increased width at the inner connection terminal. The inner connection terminal is relatively wide, so that on one hand, the conductive adapter can be conveniently connected to the inner connection terminal, to reduce the possibility that the connection between the conductive adapter and the inner connection terminal is of great difficulty due to a small width of the inner connection terminal. On the other hand, the relatively large width of the inner connection terminal helps to increase a connection area between the conductive adapter and the inner connection terminal, thereby increasing a connection force between the conductive adapter and the inner connection terminal, and reducing the possibility of the conductive adapter and the inner connection terminal being separated from each other.

In a possible implementation, the housing includes a recess portion. The recess portion is provided on the inner surface of the housing. At least a part of the conductive coil is located in the recess portion. While the thickness of the conductive coil remains unchanged, a space occupied by the conductive coil can be reduced, thereby reducing an overall thickness of the electronic device; or, while the overall thickness of the electronic device remains unchanged, a thicker conductive coil can be arranged.

In a possible implementation, a shape of the conductive coil matches a shape of the recess portion.

In a possible implementation, the electronic device further includes an insulating protection layer. The insulating protection layer covers the winding portion. The insulating protection layer insulates and isolates the conductive adapter from the winding portion, to avoid short-circuiting by contact between the conductive adapter and the winding portion. The insulating protection layer can protect the winding portion to reduce the possibility of the winding portion being corroded, and can also improve the reliability of the conductive coil in an environment with high temperature and high humidity.

In a possible implementation, the mainboard includes a first elastic piece. The outer connection terminal includes a first contact. The first elastic piece is electrically connected to the first contact. The first elastic piece of the mainboard abuts against the first contact by pressing. Therefore, it is unnecessary to arrange an additional connector to connect the mainboard and the outer connection terminal, thereby helping to reduce components in use and the assembly difficulty, and save an inner space of the electronic device.

In a possible implementation, the mainboard includes a second elastic piece, the conductive adapter includes a second contact, and the second elastic piece is electrically connected to the second contact. The second elastic piece of the mainboard abuts against the second contact by pressing. Therefore, it is unnecessary to arrange an additional connector to connect the mainboard and the conductive adapter, which helps to reduce components in use and the assembly difficulty, and save an inner space of the electronic device.

In a possible implementation, the conductive adapter and the inner connection terminal are separate structures for assembly.

In a possible implementation, the conductive adapter and the inner connection terminal are boned or welded. After the conductive adapter and the inner connection terminal are bonded and welded together, the conductive adapter and the inner connection terminal are connected by a large force, helping to reduce the possibility of the conductive adapter and the inner connection terminal being disconnected from each other.

In a possible implementation, the conductive adapter is a flexible circuit board. The conductive adapter has good flexibility and can freely bend and deform, so that the inner space of the electronic device can be fully utilized, helping to improve the space utilization of the electronic device.

In a possible implementation, the conductive adapter and the conductive coil are of an integrally formed structure. The conductive coil and the conductive adapter are formed on the housing in advance by using a conductive material, so that the conductive adapter and the inner connection terminal do not need to be connected by means of bonding or welding. The conductive coil and the conductive adapter are fastened with high strength, and do not separate from each other easily. In addition, no assembly process is required, and connection by means of bonding or welding is not required.

In a possible implementation, the winding portion is spiral-shaped.

In a possible implementation, a material of the housing is selected from ceramic, metal, plastic, glass, or glass fiber.

In a possible implementation, the electronic device further includes a battery. The inner surface of the housing is arranged to face toward the battery. The winding portion is arranged corresponding to the battery. The conductive coil is directly arranged on the housing, which helps increase a gap between the conductive coil and the battery, thereby facilitating arrangement of heat dissipation fins between the conductive coil and the battery. Alternatively, the gap between the conductive coil and the battery can serve as a buffer space when the battery expands, helping to reduce the possibility that the conductive coil or the housing is squeezed when the battery expands.

Electronic device; <NUM>. Display component; <NUM>. Housing; <NUM>. Inner surface; <NUM>. Outer surface; <NUM>. Recess portion; <NUM>. Mainboard; <NUM>. First elastic piece; <NUM>. Second elastic piece; <NUM>. Electronic component; <NUM>. Conductive coil; <NUM>. Winding portion; 61a. Axis; <NUM>. Outer connection terminal; <NUM>. First contact; <NUM>. Inner connection terminal; <NUM>. Lead-out wire; <NUM>. Conductive metal layer; <NUM>. Conductive adapter; <NUM>. Second contact; <NUM>. Battery; <NUM>. Insulating protection layer; <NUM>. Bonding member; <NUM>. Mainboard bracket; <NUM>. Conductive coil; <NUM>. Back adhesive piece; X. Thickness direction; Y. Height direction.

An electronic device in the embodiments of this application may be referred to as user equipment (user equipment, UE) or a terminal (terminal), or the like. For example, the electronic device may be a mobile terminal such as a tablet computer (portable android device, PAD), a personal digital assistant (personal digital assistant, PDA), a handheld device having a wireless communication function, a computing device, a vehicle-mounted device, a wearable device, a virtual reality (virtual reality, VR) terminal device, an augmented reality (augmented reality) terminal device, a wireless terminal in industrial control (industrial control), a wireless terminal in self driving (self driving), a wireless terminal in remote medical (remote medical), a wireless terminal in a smart grid (smart grid), a wireless terminal in transportation safety (transportation safety), a wireless terminal in a smart city (smart city), or a wireless terminal in a smart home (smart home), or a fixed terminal. The forms of the terminal device are not limited in the embodiments of this application.

In an embodiment of this application, <FIG> schematically shows a structure of an electronic device <NUM> according to an embodiment. As shown in <FIG>, the electronic device <NUM> being a handheld device having a wireless communication function is used as an example for description. For example, the handheld device having a wireless communication function may be a mobile phone.

<FIG> schematically shows a partial exploded structure of the electronic device <NUM> in the related art. As shown in <FIG>, the electronic device <NUM> includes a display component <NUM>, a housing <NUM>, a mainboard <NUM>, and an electronic component <NUM>.

The display component <NUM> has a display region that is used for displaying image information. The display component <NUM> is mounted on the housing <NUM>, and the display region of the display component <NUM> is exposed, so that image information is presented to a user. The housing <NUM> includes an outer surface and an inner surface provided opposite to each other in a thickness direction thereof. A user can observe the outer surface of the housing <NUM> from outside of the electronic device <NUM>. The mainboard <NUM> is arranged on the inner surface of the housing <NUM>, so that the user cannot easily observe the mainboard <NUM> outside the electronic device <NUM>.

The electronic component <NUM> is arranged on the mainboard <NUM>. The mainboard <NUM> may be a printed circuit board (Printed Circuit Board, PCB). The electronic component <NUM> is welded to the mainboard <NUM> through a welding process. The electronic component <NUM> includes, but is not limited to, a central processing unit (Central Processing Unit, CPU), an intelligent algorithm chip, or a power management integrated chip (Power Management IC, PMIC).

The electronic device <NUM> further includes a mainboard bracket <NUM>. The mainboard bracket <NUM> may be arranged between the housing <NUM> and the mainboard <NUM>. The mainboard bracket <NUM> can support the mainboard <NUM>. A material of the mainboard bracket <NUM> may be plastic.

The electronic device <NUM> further includes a conductive coil <NUM> and a back adhesive piece <NUM>. The conductive coil <NUM> is electrically connected to the mainboard <NUM>, thereby implementing data interaction between the conductive coil <NUM> and the mainboard <NUM>. After the conductive coil <NUM> is arranged in the electronic device <NUM>, corresponding functions can be implemented, for example, but not limited to, a wireless charging function and a near field communication function. The conductive coil <NUM> is a structural member that is arranged separately. The conductive coil <NUM> may be manufactured by winding a copper wire. To prevent the conductive coil <NUM> after the winding from rebounding under an action of an elastic restoring force and becoming loose, the conductive coil <NUM> is bonded on the back adhesive piece <NUM> so as to be fastened. When the conductive coil <NUM> is applied to the electronic device <NUM>, the conductive coil <NUM> may be bonded to the mainboard bracket <NUM> through the back adhesive piece <NUM>, so as to be fastened. Because a bonding area between the conductive coil <NUM> and the mainboard bracket <NUM> is relatively small, the conductive coil <NUM> and the mainboard bracket <NUM> are connected by a weak force and have low connection reliability. Therefore, the conductive coil <NUM> and the mainboard bracket <NUM> may be disconnected from each other, causing an adverse effect on the normal use of the conductive coil <NUM>. For example, when the conductive coil <NUM> swings relative to the mainboard bracket <NUM> under an action of an external force, the conductive coil <NUM> easily disconnects from the mainboard bracket <NUM> and can swing freely.

The electronic device <NUM> further includes an auxiliary board bracket (not shown in the figure). In a height direction Y of the electronic device <NUM>, the auxiliary board bracket and the mainboard bracket <NUM> are spaced apart. To improve the positional stability of the conductive coil <NUM>, a part of the conductive coil <NUM> that is away from the mainboard bracket <NUM> may be bonded to the auxiliary board bracket through an insulating member and a bonding member. However, the insulating member and bonding member used for connecting the conductive coil <NUM> to the auxiliary board bracket occupy the inner space of the electronic device <NUM>, and a process of connecting the conductive coil <NUM>, the insulating member, the bonding member, and the auxiliary board bracket is complex and involves many assembly processes.

In addition, after the conductive coil <NUM> is bonded and fastened to the mainboard bracket <NUM> through the back adhesive piece <NUM>, there is a gap between the conductive coil <NUM> and the housing <NUM>. As a result, the conductive coil <NUM> occupies a large inner space. When the housing <NUM> is pressed by an external force to deform toward the conductive coil <NUM>, the housing <NUM> presses the conductive coil <NUM>, resulting in wear of the conductive coil <NUM>, and causing an adverse effect on normal use of the conductive coil <NUM>.

<FIG> schematically shows a partial exploded structure of the electronic device <NUM> in an embodiment of this application. <FIG> schematically shows a connection structure of the housing <NUM>, the conductive coil <NUM>, and the mainboard <NUM> of the electronic device <NUM>. As shown in <FIG> and <FIG>, in the electronic device <NUM> provided in this embodiment of this application, the conductive coil <NUM> is arranged on the inner surface of the housing <NUM> and is integrally arranged with the housing <NUM>, so that the conductive coil <NUM> and the housing <NUM> form an integral structure. The conductive coil <NUM> and the housing <NUM> are connected by a large force and have high connection reliability, so that the conductive coil <NUM> does not easily swing to disconnect from the housing <NUM>. When the housing <NUM> is pressed, the conductive coil <NUM> and the housing <NUM> can deform simultaneously without causing mutual wear, so that the normal use of the conductive coil <NUM> is ensured.

An implementation of the electronic device <NUM> provided in the embodiments of this application is described below.

<FIG> schematically shows a partial cross-sectional structure of the electronic device <NUM> in an embodiment. As shown in <FIG>, the electronic device <NUM> in this embodiment of this application includes a housing <NUM>, a mainboard <NUM>, a conductive coil <NUM>, and a conductive adapter <NUM>. The housing <NUM> includes an inner surface <NUM> and an outer surface <NUM>. In a thickness direction X of the housing <NUM>, the inner surface <NUM> and the outer surface <NUM> are provided opposite to each other. The mainboard <NUM> is arranged on the inner surface <NUM> of the housing <NUM>. The conductive coil <NUM> is arranged on the inner surface <NUM> of the housing <NUM>. The conductive coil <NUM> is integrally arranged with the housing <NUM>. It should be noted that, the integrated arrangement of the conductive coil <NUM> and the housing <NUM> means that the conductive coil <NUM> is directly processed and formed on the housing <NUM>, so that the conductive coil <NUM> and the housing <NUM> form an integral structure, and there is no need to separately arrange a connector to connect and assemble the conductive coil <NUM> and the housing <NUM>. The conductive coil <NUM> includes a winding portion <NUM>, an outer connection terminal <NUM>, and an inner connection terminal <NUM>. The winding portion <NUM> is of a ring structure as a whole. The winding portion <NUM> has an axis 61a. In a radial direction of the winding portion <NUM>, the mainboard <NUM> is located at an outer side of the winding portion <NUM>. The outer connection terminal <NUM> is connected to the winding portion <NUM> and is located at the outer side of the winding portion <NUM>. The radial direction of the winding portion <NUM> is perpendicular to the thickness direction X of the housing <NUM>. The outer connection terminal <NUM> is electrically connected to the mainboard <NUM>. The inner connection terminal <NUM> is connected to the winding portion <NUM> and is located on an inner side of the winding portion <NUM>. The conductive adapter <NUM> is electrically connected to the mainboard <NUM> and the inner connection terminal <NUM>. The conductive coil <NUM> is electrically connected to the mainboard <NUM>, so that the conductive coil <NUM> can implement data interaction with the mainboard <NUM>.

The electronic device <NUM> in this embodiment of this application includes a housing <NUM> and a conductive coil <NUM> that are integrally arranged. The conductive coil <NUM> is directly connected to the housing <NUM>, so that the conductive coil <NUM> and the housing <NUM> form an integral structure. The conductive coil <NUM> and the housing <NUM> are connected by a large connection force and have high connection reliability, so that the conductive coil <NUM> does not easily swing to disconnect from the housing <NUM>. In addition, when the housing <NUM> is pressed, the conductive coil <NUM> and the housing <NUM> can deform simultaneously, and the housing <NUM> does not press the conductive coil <NUM>, thereby avoiding wear of the conductive coil <NUM>. In this way, the normal use of the conductive coil <NUM> is ensured. A separate connector is not required to be arranged between the conductive coil <NUM> and the housing <NUM>, and the conductive coil <NUM> does not need to be connected to the mainboard bracket or the auxiliary board bracket, thereby helping to reduce assembly processes. The conductive coil <NUM> is arranged on the inner surface of the housing <NUM>, so that the conductive coil <NUM> occupies a smaller space in the electronic device <NUM>, which helps to reduce an overall thickness of the electronic device <NUM>.

The outer connection terminal <NUM> of the conductive coil <NUM> is located at the outer side of the winding portion <NUM>, while the inner connection terminal <NUM> of the conductive coil <NUM> is located at the inner side of the winding portion <NUM>. Because the conductive coil <NUM> is integrally arranged with the housing <NUM>, the inner connection terminal <NUM> and the mainboard <NUM> are spaced apart by the winding portion <NUM>. If a part of the mainboard <NUM> extends over the winding portion <NUM> in the height direction Y and is electrically connected to the inner connection terminal <NUM>, the winding portion <NUM> and the mainboard <NUM> overlap with each other in the thickness direction X. Therefore, on one hand, a signal generated by the winding portion <NUM> may interfere with a signal of the mainboard <NUM> to affect the normal use of the mainboard <NUM>. On the other hand, when the housing <NUM> is squeezed to deform, wear occurs between the conductive coil <NUM> and the mainboard <NUM>, and a conductive element on the mainboard <NUM> may short-circuit the conductive coil <NUM> or the conductive coil <NUM> may short-circuit different electronic components <NUM> of the mainboard <NUM>. In this application, the inner connection terminal <NUM> is led out through the conductive adapter <NUM> and connected to the mainboard <NUM>, so that the mainboard <NUM> can be arranged on the outer side of the winding portion <NUM>, which helps to reduce signal interference between the conductive coil <NUM> and the mainboard <NUM>, or reduce the possibility of wear or short-circuiting between the conductive coil <NUM> and the mainboard <NUM> when the housing <NUM> is squeezed to deform, thereby improving the use safety and reliability of the electronic device <NUM>.

In some possible implementations, the electronic device <NUM> further includes a battery <NUM>. The inner surface <NUM> of the housing <NUM> is arranged to face toward the battery <NUM>. The winding portion <NUM> is arranged corresponding to the battery <NUM>. The battery <NUM> is configured to supply power for normal operation of the electronic device <NUM>. Because the conductive coil <NUM> in this embodiment of this application is directly arranged on the housing <NUM>, the gap between the conductive coil <NUM> and the battery <NUM> can be increased, to facilitate arrangement of heat dissipation fins between the conductive coil <NUM> and the battery <NUM>. Or, the gap between the conductive coil <NUM> and the battery <NUM> can serve as a buffer space when the battery <NUM> expands, helping to reduce the possibility that the conductive coil <NUM> or the housing <NUM> is squeezed when the battery <NUM> expands. The conductive adapter <NUM> occupies a small space, so that the conductive adapter <NUM> can better utilize the space between the winding portion <NUM> and the battery <NUM> to electrically connect the inner connection terminal <NUM> and the mainboard <NUM>, thereby helping to implement the electrical connection between the inner connection terminal <NUM> and the mainboard <NUM> in a case of a small overall thickness of the electronic device <NUM>. In addition, the battery <NUM> does not easily deform when being squeezed by the conductive adapter <NUM>, helping to ensure the safety of the battery <NUM> during use.

In some possible implementations, the winding portion <NUM> is spiral-shaped. The winding portion <NUM> spirals around the axis 61a. For example, the winding portion <NUM> may be of a rectangular spiral shape or a circular spiral shape. The winding portion <NUM> includes two or more turns of coils. A predetermined distance is maintained between two adjacent turns of coils. For example, when the conductive coil <NUM> is used for implementing the wireless charging function, to meet a requirement of the wireless charging function, the winding portion <NUM> may include seven turns of coils.

In some examples, there is a predetermined distance between the outer connection terminal <NUM> and an end portion of the winding portion <NUM>. The conductive coil <NUM> includes a lead-out wire <NUM>. The outer connection terminal <NUM> is connected to the winding portion <NUM> through the lead-out wire <NUM>. There is a predetermined distance between the inner connection terminal <NUM> and the end portion of the winding portion <NUM>. The inner connection terminal <NUM> is connected to the winding portion <NUM> through the lead-out wire <NUM>.

In some possible implementations, a conductive layer having a predetermined pattern is formed on the housing <NUM> by using a conductive material. The conductive material is sprayed, coated, or electroplated on the housing <NUM> along a predetermined track, thereby forming a conductive layer with a predetermined pattern. The conductive layer forms the conductive coil <NUM>. In other possible implementations, an integral conductive layer is formed on the housing <NUM> by using a conductive material. The conductive material is sprayed, coated, or electroplated on the housing <NUM>, thereby forming an integral conductive layer. The integral conductive layer is patterned to form the conductive coil <NUM>. For example, an integral conductive layer is etched by using an etching process or an integral conductive layer is cut by using a machining method, so that the conductive layer is patterned to form the conductive coil <NUM>.

In some examples, the conductive material may be selected from gold, silver, copper, or copper alloy.

In other possible implementations, the conductive adapter <NUM> is located on a side of the conductive coil <NUM> facing away from the inner surface <NUM> of the housing <NUM>. If the conductive coil <NUM> is located on the side of the conductive coil <NUM> facing the inner surface <NUM> of the housing <NUM>, the conductive adapter <NUM> needs to be placed at a predetermined position on the housing <NUM> in advance. The conductive adapter <NUM> arranged in advance causes positional interference. Therefore, when the conductive coil <NUM> is formed on the housing <NUM> by using a conductive material, the conductive coil <NUM> is not directly connected to the housing <NUM> in a region where the conductive adapter <NUM> is arranged. On one hand, because a part of the conductive coil <NUM> needs to be arranged on the side of the conductive adapter <NUM> facing away from the housing <NUM>, processing of the conductive coil <NUM> becomes complex. On the other hand, because the conductive coil <NUM> is not in direct contact with the housing <NUM> at the conductive adapter <NUM>, a connection area between the conductive coil <NUM> and the housing <NUM> is reduced, and the connection force between the conductive coil <NUM> and the housing <NUM> is reduced. In this embodiment, by arranging the conductive adapter <NUM> on the side of the conductive coil <NUM> facing away from the inner surface <NUM> of the housing <NUM>, the entire conductive coil <NUM> can be formed in advance on the housing <NUM> by using a conductive material, so that the conductive coil <NUM> is connected to the housing <NUM> in all regions, thereby ensuring the connection between the conductive coil <NUM> and the housing <NUM> to be stable and reliable. The conductive adapter <NUM> is then arranged from the side of the conductive coil <NUM> that faces away from the inner surface <NUM> of the housing <NUM>, which helps to reduce the difficulty of arranging the conductive adapter <NUM>.

In some possible implementations, as shown in <FIG>, the conductive coil <NUM> has an increased width at the inner connection terminal <NUM>. The inner connection terminal <NUM> is relatively wide, so that on one hand, the conductive adapter <NUM> can be conveniently connected to the inner connection terminal <NUM>, to reduce the possibility that the connection between the conductive adapter <NUM> and the inner connection terminal <NUM> is of great difficulty due to a small width of the inner connection terminal <NUM>. On the other hand, the relatively large width of the inner connection terminal <NUM> helps to increase a connection area between the conductive adapter <NUM> and the inner connection terminal <NUM>, thereby increasing a connection force between the conductive adapter <NUM> and the inner connection terminal <NUM>, and reducing the possibility of the conductive adapter <NUM> and the inner connection terminal <NUM> being separated from each other. In some examples, the width of the conductive adapter <NUM> is less than or equal to the width of the inner connection terminal <NUM>.

In some possible implementations, as shown in <FIG>, the conductive coil <NUM> has an increased width at the outer connection terminal <NUM>. The outer connection terminal <NUM> is relatively wide, so that on one hand, the outer connection terminal <NUM> can be conveniently connected to the mainboard <NUM>, to reduce the possibility that the connection between the outer connection terminal <NUM> and the mainboard <NUM> is of great difficulty due to a small width of the outer connection terminal <NUM>. On the other hand, the relatively large width of the outer connection terminal62 helps to increase a connection area between the outer connection terminal <NUM> and the mainboard <NUM>, thereby increasing a connection force between the outer connection terminal <NUM> and the mainboard <NUM>, and reducing the possibility of the outer connection terminal <NUM> and the mainboard <NUM> being separated from each other.

In some possible implementations, as shown in <FIG>, the conductive coil <NUM> has an increased at the inner connection terminal <NUM>. A thickness direction of the conductive coil <NUM> is the same as the thickness direction X of the housing <NUM>. The thickness direction X of the housing <NUM> is a direction from the inner surface <NUM> to the outer surface <NUM>. Relative to the thickness of the winding portion <NUM>, the thickness of the inner connection terminal <NUM> is larger, so that a region of the inner connection terminal <NUM> facing away from the inner surface <NUM> of the housing <NUM> can be higher than the winding portion <NUM>. Therefore, when the conductive adapter <NUM> is connected to the region of the inner connection terminal <NUM> facing away from the inner surface <NUM>, a gap may be reserved between the conductive adapter <NUM> and the winding portion <NUM>, which reduces the possibility of positional interference between the conductive adapter <NUM> and the winding portion <NUM>, and also helps to reduce the possibility of short-circuiting between the conductive adapter <NUM> and the winding portion <NUM>. For example, a minimum thickness of the conductive coil <NUM> may range from <NUM> to <NUM>.

In some examples, the conductive coil <NUM> is of a flat structure. For example, a cross section of the conductive coil <NUM> is rectangular. A surface of the conductive coil <NUM> facing the housing <NUM> is a plane, so that a contact area between the conductive coil <NUM> and the housing <NUM> is relatively large, helping to improve the connection force between the conductive coil <NUM> and the housing <NUM> and improve the connection reliability and stability between the conductive coil <NUM> and the housing <NUM>.

In some possible implementations, as shown in <FIG>, the electronic device <NUM> further includes an insulating protection layer <NUM>. The insulating protection layer <NUM> covers the winding portion <NUM>. On one hand, the insulating protection layer <NUM> insulates and isolates the conductive adapter <NUM> from the winding portion <NUM>, to avoid short-circuiting by contact between the conductive adapter <NUM> and the winding portion <NUM>. On the other hand, the insulating protection layer <NUM> can protect the winding portion <NUM> to reduce the possibility of the winding portion <NUM> being corroded, and can also improve the reliability of the conductive coil <NUM> in an environment with high temperature and high humidity. For example, a coating is formed on the outside of the conductive coil <NUM> by using a spraying process or a coating process. For example, the insulating protection layer <NUM> may be a ceramic coating. Alternatively, a coating is formed on the outside of the conductive coil <NUM> by using an ultraviolet curing process. For example, the insulating protection layer <NUM> may be a resin coating.

In some examples, the conductive adapter <NUM> is located on the side of the conductive coil <NUM> facing away from the inner surface <NUM> of the housing <NUM>. The insulating protection layer <NUM> can insulate and isolate the winding portion <NUM> from the conductive adapter <NUM>, thereby reducing the possibility of short-circuiting by contact between the conductive adapter <NUM> and the winding portion <NUM>.

In some examples, the insulating protection layer <NUM> can cover at least a part of the conductive adapter <NUM> and the winding portion <NUM>, thereby protecting both the conductive adapter <NUM> and the winding portion <NUM>.

In some possible implementations, <FIG> schematically shows a partial cross-sectional structure of the electronic device <NUM> in an embodiment. As shown in <FIG> and <FIG>, the mainboard <NUM> includes a first elastic piece <NUM>. The outer connection terminal <NUM> includes a first contact <NUM>. The first elastic piece <NUM> is electrically connected to the first contact <NUM>, thereby implementing an electrical connection between the outer connection terminal <NUM> and the mainboard <NUM>. The first elastic piece <NUM> of the mainboard <NUM> abuts against the first contact <NUM> by pressing. Therefore, it is unnecessary to arrange an additional connector to connect the mainboard <NUM> and the conductive adapter <NUM>, which helps to reduce components in use and the assembly difficulty, and save an inner space of the electronic device <NUM>. For example, a material of the first elastic piece <NUM> may be copper, copper alloy, aluminum, or aluminum alloy.

In some possible implementations, a board-to-board connector (board to board, BTB) is arranged on each of the conductive adapter <NUM> and the mainboard <NUM>. The conductive adapter <NUM> and the mainboard <NUM> are connected to each other through plugging between the two board-to-board connectors.

The mainboard <NUM> includes a second elastic piece <NUM>. The conductive adapter <NUM> includes a second contact <NUM>. The second elastic piece <NUM> is electrically connected to the second contact <NUM>, thereby implementing an electrical connection between the conductive adapter <NUM> and the mainboard <NUM>. The second elastic piece <NUM> of the mainboard <NUM> abuts against the first contact <NUM> by pressing. Therefore, it is unnecessary to arrange an additional connector to connect the mainboard <NUM> and the conductive adapter <NUM>, which helps to reduce components in use and the assembly difficulty, and save an inner space of the electronic device <NUM>. For example, a material of the second elastic piece <NUM> may be copper, copper alloy, aluminum, or aluminum alloy.

In some possible implementations, the conductive adapter <NUM> and the inner connection terminal <NUM> are separate structures for assembly. The conductive adapter <NUM> is an electronic component <NUM> manufactured separately. The conductive adapter <NUM> may be connected to the inner connection terminal <NUM> through assembly. For example, the conductive adapter <NUM> is connected to the inner connection terminal <NUM> through bonding. For example, the conductive adapter <NUM> and the inner connection terminal <NUM> are connected through bonding by using a conductive adhesive, ensuring that the conductive adapter <NUM> and the inner connection terminal <NUM> are mutually conductive, and ensuring the connection reliability between the conductive adapter <NUM> and the inner connection terminal <NUM>. Alternatively, the conductive adapter <NUM> is connected to the inner connection terminal <NUM> through welding. The conductive adapter <NUM> and the inner connection terminal <NUM> may be made of a same material, so that after the conductive adapter <NUM> and the inner connection terminal <NUM> are welded to each other, the conductive adapter <NUM> and the inner connection terminal <NUM> are connected by a large force, helping to reduce the possibility of the conductive adapter <NUM> and the inner connection terminal <NUM> being disconnected from each other. As shown in <FIG>, a part of the conductive adapter <NUM> exceeding the winding portion <NUM> is bonded to the inner surface <NUM> of the housing <NUM> through a bonding member <NUM> to ensure that a position is fixed and does not easily shift. The bonding member <NUM> may be a double-sided adhesive tape or an adhesive glue. In some examples, the conductive adapter <NUM> is a flexible printed circuit board (Flexible Printed Circuit, FPC). The conductive adapter <NUM> has good flexibility and can freely bend and deform, so that the inner space of the electronic device <NUM> can be fully utilized, helping to improve the space utilization of the electronic device <NUM>. After the conductive coil <NUM> is formed on the housing <NUM>, one end of the conductive adapter <NUM> can be connected to the inner connection terminal <NUM>, and the other end can be connected to the mainboard <NUM>. The inner connection terminal <NUM> is led out through the conductive adapter <NUM> and is electrically connected to the mainboard <NUM>.

In some possible implementations, <FIG> schematically shows a partial cross-sectional structure of the electronic device <NUM> in an embodiment. Referring to <FIG>, the housing <NUM> includes a recess portion <NUM>. The recess portion <NUM> is provided on the inner surface <NUM> of the housing <NUM>. At least a part of the conductive coil <NUM> is located in the recess portion <NUM>. While the thickness of the conductive coil <NUM> remains unchanged, a space occupied by the conductive coil <NUM> can be reduced, thereby reducing an overall thickness of the electronic device <NUM>; or, while the overall thickness of the electronic device <NUM> remains unchanged, a thicker conductive coil <NUM> can be arranged. For example, a depth of the recess portion <NUM> is greater than or equal to the thickness of the conductive coil <NUM>. The entire conductive coil <NUM> may be located in the recess portion <NUM>. In some examples, there is one recess portion <NUM>. The entire conductive coil <NUM> may be located on a bottom wall of the recess portion <NUM>. In other examples, <FIG> schematically shows a partial cross-sectional structure of the electronic device <NUM> in an embodiment. Referring to <FIG>, a shape of the recess portion <NUM> matches a shape of the conductive coil <NUM>. The recess portion <NUM> extends along a predetermined track. A conductive material may be correspondingly arranged in a region of the recess portion <NUM> to form the conductive coil <NUM>.

<FIG> schematically shows a connection structure of the housing <NUM>, the conductive coil <NUM>, and the mainboard <NUM> of the electronic device <NUM>. The structure of the electronic device <NUM> in the embodiment shown in <FIG> is the same as the structure of the electronic device <NUM> in the embodiment shown in <FIG>. The same content is not repeated herein again, and the differences are mainly described herein. Referring to <FIG>, the conductive adapter <NUM> is a metal conductive layer. With the inner connection terminal <NUM> as a starting point, the conductive material is formed into the conductive adapter <NUM> by using a coating process or an electroplating process. The material of the conductive adapter <NUM> and the material of the conductive coil <NUM> may be the same. The conductive coil <NUM> is formed on the housing <NUM> in advance by using conductive material, and then starting from the inner connection terminal <NUM>, the conductive adapter <NUM> is formed by using the conductive material, so that the conductive adapter <NUM> and the inner connection terminal <NUM> do not need to be connected by means of bonding or welding. When the conductive adapter <NUM> and the inner connection terminal <NUM> are connected by welding, if a welding position shifts or a welding depth is relatively large, undesirable appearances of the housing <NUM> such as wrapping or deformation may occur. If the housing <NUM> is burnt through during welding, the housing <NUM> is scrapped. When the conductive adapter <NUM> and the inner connection terminal <NUM> are connected by bonding, selection of a bonding material or a bonding position affects the connection force between the conductive adapter <NUM> and the inner connection terminal <NUM>. If the bonding material is improperly selected or the bonding position shifts, the connection force between the conductive adapter <NUM> and the inner connection terminal <NUM> may be weak, causing a deviation in the connection reliability between the conductive adapter <NUM> and the inner connection terminal <NUM>, and separation easily occurs.

In some examples, <FIG> schematically shows a partial cross-sectional structure of the electronic device <NUM> in an embodiment. Referring to <FIG>, the conductive adapter <NUM> and the conductive coil <NUM> are of an integrally formed structure. The conductive adapter <NUM> and the inner connection terminal <NUM> are of an integrally formed structure, so that the two are firmly connected and are not prone to separation. In addition, no assembly process is required, and connection by means of bonding and welding is not required. The conductive coil <NUM> and conductive adapter <NUM> may be formed in one process by using a conductive material. There is a continuous transition between the conductive coil <NUM> and the conductive adapter <NUM>. For example, with the outer connection terminal <NUM> as a starting position and an end portion, which is to be connected to the mainboard <NUM>, of the conductive adapter <NUM> as an ending position, the conductive material is sprayed or coated from the starting position to the ending position along a predetermined track to form the conductive coil <NUM> and the conductive adapter <NUM>.

As shown in <FIG>, the conductive adapter <NUM> includes a second contact <NUM>. The mainboard <NUM> includes a second elastic piece <NUM>. The second elastic piece <NUM> is pressed against the second contact <NUM> to implement the electrical connection between the conductive adapter <NUM> and the mainboard <NUM>. Because the conductive adapter <NUM> is formed on the housing <NUM>, the housing <NUM> with high rigidity may be used for bearing a resilience force of the second elastic piece <NUM>. The housing <NUM> with high rigidity does not easily deform, which can reduce the possibility of the second elastic piece <NUM> and the second contact <NUM> being separated from each other due to deformation of the housing <NUM>.

In some possible implementations, each turn of coil of the winding portion <NUM> may include a conductive metal layer. A conductive metal layer winds along a predetermined track to form the winding portion <NUM>. In other possible implementations, as shown in <FIG>, each turn of the coil of the winding portion <NUM> may include two winding conductive metal layers <NUM>. The two conductive metal layers <NUM> are parallel to each other, and the two conductive metal layers <NUM> simultaneously wind along a predetermined track to form the winding portion <NUM>. When the conductive coil <NUM> is used for implementing a wireless charging function, an arrangement in which each turn of coil includes two winding conductive metal layers <NUM> can help to reduce inductive resistance and improve the efficiency of wireless charging.

In some possible implementations, a material of the housing <NUM> may be selected from ceramic, metal, plastic, glass, or glass fiber.

In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and defined, the terms "mount", "connect", and "connection" should be understood in a broad sense, for example, fixed connection, indirect connection by a medium, or internal communication between two elements or an interaction relationship between the two elements. A person of ordinary skill in the art may understand the specific meanings of the foregoing terms in the embodiments of this application according to specific situations.

The embodiments of this application do not indicate or imply that the mentioned apparatus or element needs to have a particular direction and be constructed and operated in the particular direction, and therefore cannot be understood as a limitation on the embodiments of this application. In the description of the embodiments of this application, "plurality of" means two or more unless otherwise precisely and specifically described.

The terms such as "first", "second", "third", and "fourth" (if any) in the specification and claims of the embodiments of this application and in the accompanying drawings are used for distinguishing between similar objects and not necessarily used for describing any particular order or sequence. It should be understood that data used in this way is interchangeable in a suitable case, so that the embodiments of the embodiments of this application described herein can be implemented in a sequence in addition to the sequence shown or described herein.

Moreover, the terms "comprise," "comprise", and any other variants thereof are intended to cover the non-exclusive inclusion. For example, a process, method, system, product, or device that includes a list of steps or units is not necessarily limited to those expressly listed steps or units, but may include other steps or units not expressly listed or inherent to such a process, method, product, or device.

"Plurality of" in this specification means two or more. The term "and/or" used herein describes only an association relationship for describing associated objects and represents that three relationships may exist. For example, A and/or B may represent the following three cases: only A exists, both A and B exist, and only B exists. In formulas, the character "/" indicates a "division" relationship between the associated objects.

Claim 1:
An electronic device (<NUM>), comprising at least:
a housing (<NUM>), comprising an inner surface (<NUM>) and an outer surface (<NUM>) provided opposite to each other;
a mainboard (<NUM>), arranged on the inner surface (<NUM>);
a conductive coil (<NUM>), arranged on the inner surface (<NUM>) and integrally arranged with the housing (<NUM>), wherein the conductive coil (<NUM>) comprises a winding portion (<NUM>), an outer connection terminal (<NUM>), and an inner connection terminal (<NUM>); in a radial direction of the winding portion (<NUM>), the mainboard (<NUM>) is located at an outer side of the winding portion (<NUM>), the outer connection terminal (<NUM>) is connected to the winding portion (<NUM>) and is located at the outer side of the winding portion (<NUM>), the outer connection terminal (<NUM>) is electrically connected to the mainboard (<NUM>), and the inner connection terminal (<NUM>) is connected to the winding portion (<NUM>) and is located at an inner side of the winding portion (<NUM>); and
a conductive adapter (<NUM>), wherein the conductive adapter (<NUM>) is electrically connected to the mainboard (<NUM>) and the inner connection terminal (<NUM>),
characterized in that
a part of the conductive adapter (<NUM>) exceeding the winding portion (<NUM>) is bonded to the inner surface (<NUM>) of the housing (<NUM>) through a bonding member (<NUM>);
the mainboard (<NUM>) comprises an elastic piece (<NUM>);
the conductive adapter (<NUM>) comprises a contact (<NUM>);
the contact (<NUM>) is located on a side of the conductive adapter (<NUM>) that is opposite a side of the conductive adapter (<NUM>) that faces the bonding member (<NUM>); and
the elastic piece (<NUM>) is electrically connected to the contact (<NUM>).