CN111462998A

CN111462998A - Coil assembly and electronic device

Info

Publication number: CN111462998A
Application number: CN202010443644.3A
Authority: CN
Inventors: 黄武鑫
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2020-05-22
Filing date: 2020-05-22
Publication date: 2020-07-28

Abstract

The application discloses coil pack and electronic equipment, coil pack includes: a circuit board; the first coil is arranged on the circuit board; the second coil is arranged on the circuit board, the second coil and the first coil are spaced in the thickness direction of the circuit board, the area defined by the projection outline of the first coil on the circuit board is a first area, the area defined by the projection outline of the second coil on the circuit board is a second area, and the first area and the second area are partially overlapped. According to the coil component, when the first coil works, the induced electromotive force on the second coil can be reduced, so that the functional risks of breakdown and overcurrent of a circuit element where the second coil is located are reduced, and the reliability of the work of a circuit where the first coil is located and a circuit where the second coil is located is ensured.

Description

Coil assembly and electronic device

Technical Field

The application relates to the technical field of electronic equipment, in particular to a coil assembly and electronic equipment.

Background

In the related art, a plurality of coils, such as an NFC (near field communication, NFC for short) coil and a wireless charging coil, may be provided in an electronic device at the same time, and the plurality of coils are provided inside and outside, for example, when two coils are provided, one coil is located outside the other coil, but when the external coil is in operation, a large current may be generated, the alternating current may generate a large induced electromotive force on the internal coil, and a circuit where the internal coil is located may have functional risks of breakdown and overcurrent.

Disclosure of Invention

The application provides a coil pack, coil pack operational reliability is high.

The application also provides an electronic device, which comprises the coil component.

A coil assembly according to an embodiment of the present application includes: a circuit board; the first coil is arranged on the circuit board; the second coil is arranged on the circuit board, the second coil and the first coil are spaced in the thickness direction of the circuit board, the area defined by the outer contour of the projection of the first coil on the circuit board is a first area, the area defined by the outer contour of the projection of the second coil on the circuit board is a second area, and the first area and the second area are partially overlapped.

According to the coil component, the first area and the second area which are defined by the outer contour lines of the projections of the first coil and the second coil on the circuit board are partially overlapped, when the first coil works, induced electromotive force on the second coil can be reduced, functional risks of breakdown and overcurrent of a circuit element where the second coil is located are reduced, and reliability of work of a circuit where the first coil is located and a circuit where the second coil is located is guaranteed.

According to the electronic equipment of this application embodiment, include: the coil component is arranged in the shell.

According to the electronic equipment of the embodiment of the application, the first area and the second area which are defined by the outer contour lines of the projections of the first coil and the second coil on the circuit board are partially overlapped, when the first coil works, the induced electromotive force on the second coil can be reduced, so that the functional risks of breakdown and overcurrent of a circuit element where the second coil is located are reduced, and the working reliability of a circuit where the first coil is located and a circuit where the second coil is located is ensured.

Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.

Drawings

The above and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic diagram of the positions of a first coil and a second coil of a coil assembly according to an embodiment of the present application;

FIG. 2 is a projection of a first coil and a second coil of a coil assembly on a circuit board according to an embodiment of the present application;

FIG. 3 is a side view of a coil assembly according to an embodiment of the present application;

fig. 4 is a rear view of an electronic device according to an embodiment of the application.

Reference numerals:

the electronic device 100 is provided with a display device,

the coil assembly 10 is provided with a coil element,

a circuit board 1, a first circuit board 11, a second circuit board 12,

the first coil 2, the first region 21, the first line region 22,

the second coil 3, the second region 31, the first sub-region 311, the second sub-region 312, the third sub-region 313,

a housing 20, a first mounting area 201, a second mounting area 202, a third mounting area 203.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.

A coil block 10 according to an embodiment of the present application is described below with reference to the drawings.

As shown in fig. 1 to 3, a coil assembly 10 according to an embodiment of the present application includes: a circuit board 1, a first coil 2 and a second coil 3.

As shown in fig. 3, the first coil 2 is disposed on the circuit board 1, the second coil 3 is disposed on the circuit board 1, and the second coil 3 is spaced apart from the first coil 2 in the thickness direction of the circuit board 1, so that the risk of short circuit between the circuit where the first coil 2 is located and the circuit where the second coil 3 is located due to contact between the first coil 2 and the second coil 3 can be avoided, and the stability of the operation of the first coil 2 and the second coil 3 can be ensured.

As shown in fig. 2, the area defined by the outer contour of the projection of the first coil 2 on the circuit board is a first area 21, the area defined by the outer contour of the projection of the second coil 3 on the circuit board is a second area 31, and the first area 21 and the second area 31 are partially overlapped. As shown in fig. 1, when the first area 21 and the second area 31 partially overlap, it can be understood that when the first area 21 and the second area 31 intersect, the first coil 2 has a larger current during operation, and assuming that the current direction is counterclockwise as shown by an arrow in fig. 1, the magnetic force lines inside the first coil 2 are equivalently opposite to the magnetic force lines outside the first coil 2 according to the right-hand ampere law, that is, the vector sum of the magnetic force lines passing through the second coil 3 is reduced, and the induced electromotive force of the second coil 3 is also reduced, so as to reduce the functional risk that the circuit element in which the second coil 3 is located is broken down and subjected to overcurrent.

In the description of the present application, it is to be understood that the terms "thickness," "counterclockwise," "inner," "outer," and the like refer to an orientation or positional relationship based on that shown in the drawings, which is for convenience and simplicity of description only, and does not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be considered as limiting the present application. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

According to the coil component 10 of the embodiment of the application, the first area 21 and the second area 31 which are defined by the outer contour lines of the projections of the first coil 2 and the second coil 3 on the circuit board are partially overlapped, when the first coil 2 works, the induced electromotive force on the second coil 3 can be reduced, so that the functional risks of breakdown and overcurrent of the circuit element where the second coil 3 is located are reduced, and the working reliability of the circuit where the first coil 2 is located and the circuit where the second coil 3 is located is ensured.

Further, as shown in fig. 2, the projection of the first coil 2 on the circuit board includes a first line region 22, the first line region 22 divides the second region 31 into a first sub-region 311, a second sub-region 312 and a third sub-region 313, the first sub-region 311 coincides with the first line region 22, the second sub-region 312 and the third sub-region 313 are respectively located at two sides of the first sub-region 311, the second sub-region 312 coincides with the first region 21, and the second sub-region 312 and the third sub-region 313 are equal in area. Therefore, the vector sum of magnetic force lines passing through the second coil 3 can be better reduced, the induced electromotive force on the second coil 3 is reduced when the first coil 2 works, the functional risks of breakdown and overcurrent of circuit elements where the second coil 3 is located are reduced, and the reliability of the work of a circuit where the first coil 2 is located and a circuit where the second coil 3 is located is ensured.

Further, as shown in fig. 2, the first line region 22 extends along a straight line. From this, can simplify the structure of first coil 2, the cutting second area 31 that first lines region 22 can be better is convenient for, thereby better utilization first coil 2 cutting second coil 3, thereby better position that sets up first coil 2 and second coil 3, and can reduce the induced electromotive force on the second coil 3 when first coil 2 works, reduce the circuit component that second coil 3 place and be punctured and the functional risk of overflowing, guarantee the reliability of the circuit work that first coil 2 place and second coil 3 place.

Still further, the length of the first line region 22 is greater than the length of the first sub-region 311. From this be convenient for first rectilinear area 22 can be better cutting second area 31, thereby better utilization first coil 2 cutting second coil 3, thereby better setting up the position of first coil 2 and second coil 3, and can reduce the induced electromotive force on the second coil 3 when first coil 2 works, reduce the functional risk that the circuit component at second coil 3 place was punctured and overflows, guarantee the reliability of the circuit work at first coil 2 place's circuit and second coil 3 place.

In the description of the present application, it is to be understood that the terms "length" and the like indicate an orientation or positional relationship based on that shown in the drawings, which is merely for convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application.

Preferably, as shown in fig. 2, the second sub-area 312 and the third sub-area 313 are symmetrical. As shown in fig. 1, the sum of the magnetic force vectors passing through the second coil 3 is almost 0, and the induced electromotive force of the second coil 3 is almost 0, so as to eliminate the functional risk of breakdown and overcurrent of the circuit component in which the second coil 3 is located.

As shown in fig. 3, the circuit board 1 includes a first circuit board 11 and a second circuit board 12, the first circuit board 11 and the second circuit board 12 are stacked, the first coil 2 is provided on the first circuit board 11, and the second coil 3 is provided on the second circuit board 12. Therefore, the first coil 2 and the second coil 3 can be better spaced, a circuit where the first coil 2 is located and a circuit where the second coil 3 is located can be spaced, the risk that the first coil 2 and the second coil 3 are in contact to cause short circuit of the circuit where the first coil 2 is located and the circuit where the second coil 3 is located can be avoided, and the working stability of the first coil 2 and the second coil 3 is ensured.

For example, in the example shown in fig. 3, the first coil 2 is provided on a side of the first circuit board 11 remote from the second circuit board 12, and the second coil 3 is provided on a side of the second circuit board 12 close to the first circuit board 11. Of course, the present application is not limited thereto, and the first coil 2 may be disposed on a side of the first circuit board 11 away from the second circuit board 12, and the second coil 3 may be disposed on a side of the second circuit board 12 away from the first circuit board 11, or the first coil 2 may be disposed on a side of the first circuit board 11 close to the second circuit board 12, and the second coil 3 may be disposed on a side of the second circuit board 12 away from the first circuit board 11.

The first circuit board 11 and the second circuit board 12 may be an integral piece, that is, the first circuit board 11 and the second circuit board 12 constitute a multilayer circuit board, and both the first circuit board 11 and the second circuit board 12 are one layer of the multilayer circuit board.

Further, the circuit board 1 is a flexible circuit board, and the first coil 2 and the second coil 3 are respectively disposed on two surfaces opposite to the flexible circuit board. The flexible circuit board 1 has the characteristics of high wiring density, light weight, thin thickness and good bending property, and is beneficial to reducing the weight and the volume of the electronic device 100 using the coil assembly 10 and facilitating the arrangement of circuits where the first coil 2 and the second coil 3 are located.

Optionally, the first coil 2 is an NFC coil, and the second coil 3 is a wireless charging coil. The devices (such as mobile phones) using the NFC technology can exchange data when they are close to each other, and are integrated and evolved from non-contact Radio Frequency Identification (RFID) and interconnection technologies, and by integrating functions of an inductive card reader, an inductive card and point-to-point communication on a single chip, applications such as mobile payment, electronic ticketing, door access, mobile identity recognition, anti-counterfeiting, etc. are implemented using a mobile terminal. The electronic device 100 using the wireless charging coil may implement a wireless charging function of the electronic device 100.

Alternatively, as shown in fig. 1, the first coil 2 is a circular, elliptical or polygonal coil, and the second coil 3 is a circular, elliptical or polygonal coil. For example, in the example shown in fig. 1, the first coil 2 is a square coil, and the second coil 3 is a circular coil. Of course, the present application is not limited thereto, and the first coil 2 and the second coil 3 may have other shapes, thereby increasing the diversity of the structures of the first coil 2 and the second coil 3.

The electronic device 100 according to an embodiment of the present application is described below.

The electronic device 100 according to the embodiment of the present application includes a housing 20 and the coil assembly 10, where the coil assembly 10 is located in the housing 20.

According to the electronic device 100 of the embodiment of the application, the first area 21 and the second area 31 which are defined by the outer contour lines of the projections of the first coil 2 and the second coil 3 on the circuit board are partially overlapped, when the first coil 2 works, the induced electromotive force on the second coil 3 can be reduced, so that the functional risks of breakdown and overcurrent of the circuit element where the second coil 3 is located are reduced, and the working reliability of the circuit where the first coil 2 is located and the circuit where the second coil 3 is located is ensured.

Further, as shown in fig. 4, the housing 20 includes a first mounting area 201, a second mounting area 202, and a third mounting area 203 in a top-to-bottom direction, and at least a part of the first coil 2 is located in the first mounting area 201. Therefore, the use by the user is convenient, and the user experience can be improved.

Further, the first mounting region 201, the second mounting region 202, and the third mounting region 203 are the same in height in the up-down direction.

In the description of the present application, it is to be understood that the terms "upper", "lower", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.

Optionally, the first coil 2 is an NFC coil. In the related art, the strong point of the NFC induction area is located in the center of the NFC coil, and is generally offset from the lower half of the electronic device 100. According to the user experience investigation, the area 1/3 of the NFC sensing zone on the mobile phone is more suitable for the user experience requirement. In this application, by making the first coil 2 be located in the first installation area 201, the strong point of the NFC sensing area moves upward synchronously, and the experience of the user can be improved.

By way of example, the electronic device 100 may be any of various types of computer system devices (one example of which is shown in FIG. 4) that are mobile or portable and that perform wireless communications. Specifically, the electronic device 100 may be a mobile phone or smart phone (e.g., an iPhone (TM) based, Android (TM) based phone), a Portable gaming device (e.g., a Nintendo DS (TM), a PlayStation Portable (TM), a Game Advance (TM), an iPhone (TM)), a laptop, a PDA, a Portable Internet device, a music player and data storage device, other handheld devices and headsets such as watches, in-ear headphones, pendant, headphones, etc., and the electronic device 100 may also be other wearable devices (e.g., a Head Mounted Device (HMD) such as electronic glasses, electronic clothing, electronic bracelets, electronic necklaces, electronic tattoos, electronic devices, or smart watches).

The electronic device 100 may also be any of a number of electronic devices including, but not limited to, cellular phones, smart phones, other wireless communication devices, personal digital assistants, audio players, other media players, music recorders, video recorders, cameras, other media recorders, radios, medical devices, vehicle transportation equipment, calculators, programmable remote controllers, pagers, laptop computers, desktop computers, printers, netbook computers, Personal Digital Assistants (PDAs), Portable Multimedia Players (PMPs), moving Picture experts group (MPEG-1 or MPEG-2) Audio layer (MP3) players, portable medical devices, and digital cameras, and combinations thereof.

In some cases, electronic device 100 may perform multiple functions (e.g., playing music, displaying videos, storing pictures, and receiving and sending telephone calls). If desired, the electronic device 100 may be a portable device such as a cellular telephone, media player, other handheld device, wrist watch device, pendant device, earpiece device, or other compact portable device.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

In the description herein, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.

Claims

1. A coil assembly, comprising:

a circuit board;

the first coil is arranged on the circuit board;

the second coil is arranged on the circuit board, the second coil and the first coil are spaced in the thickness direction of the circuit board, the area defined by the outer contour of the projection of the first coil on the circuit board is a first area, the area defined by the outer contour of the projection of the second coil on the circuit board is a second area, and the first area and the second area are partially overlapped.

2. The coil assembly of claim 1, wherein the projection of the first coil on the circuit board comprises a first line region dividing the second region into a first sub-region, a second sub-region, and a third sub-region, the first sub-region coinciding with the first line region, the second sub-region and the third sub-region being respectively located on both sides of the first sub-region, the second sub-region coinciding with the first region, the second sub-region and the third sub-region being equal in area.

3. The coil assembly of claim 2 wherein the first line region extends along a straight line.

4. The coil assembly of claim 3, wherein the second and third sub-regions are symmetrical.

5. The coil assembly of claim 1, wherein the circuit board comprises a first circuit board and a second circuit board, the first circuit board and the second circuit board being stacked, the first coil being disposed on the first circuit board, the second coil being disposed on the second circuit board.

6. The coil assembly according to any one of claims 1 to 5, wherein the circuit board is a flexible circuit board, and the first coil and the second coil are respectively disposed on two opposite surfaces of the flexible circuit board.

7. The coil assembly of any of claims 1-5, wherein the first coil is a circular, elliptical, or polygonal coil and the second coil is a circular, elliptical, or polygonal coil.

8. The coil assembly of any one of claims 1-5, wherein the first coil is an NFC coil and the second coil is a wireless charging coil.

9. An electronic device, comprising:

a housing;

the coil assembly of any of claims 1-8, the coil assembly being disposed within the housing.

10. The electronic device of claim 9, wherein the housing comprises a first mounting area, a second mounting area, and a third mounting area in a top-to-bottom direction, at least a portion of the first coil being located within the first mounting area.