TW202141848A - Wire parallel embedded wireless charging antenna - Google Patents

Abstract

The present disclosure is related to a wire parallel embedded wireless charging antenna which is a hybrid type wireless charging antenna, the wire parallel embedded wireless charging antenna including a substrate, a coil member, and a charging circuit unit, wherein the coil member is wound in a structure in which wires are parallel and embedded to a predetermined depth in the substrate formed in a planar structure, and a thin metal plate member crosses over the wires at an end point position of the wires embedded in parallel and connects the coil member to the charging circuit unit at a start point position of the wires at an opposite side to form a wireless charging antenna, thereby reducing the overall thickness of the wireless charging antenna.

Description

Wire parallel embedded wireless charging antenna

The present invention relates to a wire-parallel embedded wireless charging antenna. The wireless charging antenna is manufactured through a hybrid process. In the hybrid process, a plurality of wires are embedded in parallel in an antenna substrate at a predetermined depth and have a predetermined size. The hole is formed at the end position of one of the wires embedded in parallel, and then a thin metal plate member passes through the formed hole to connect the wire to a charging circuit unit at the start position of one of the wires, so as not to increase the contact with the thin metal plate member or The thickness of the wires overlapped to make a wireless antenna.

As we all know, due to the development of wireless technology for modern electronic devices, wireless charging technology for electronic devices including smart phones has also been developed. In order to realize the wireless charging technology, various types of antennas have been developed to improve the communication efficiency between the transmission module (Tx) and the receiving module (Rx). Especially with the diversification of smart phone functions, the demand for high-efficiency ultra-thin wireless charging antennas is gradually increasing.

At present, in order to make wireless charging antennas as thin as possible, most wireless charging antennas are manufactured by etching and melting metal films with high conductivity (such as copper or aluminum), or using advanced cutting technologies (laser cutting, punching, etc.). Hole or similar method) to attach the metal film to a substrate. In order to ensure a higher surface current value, a wireless charging antenna is formed in a stacked structure including multiple layers. Because a thin metal plate having a size of 10 micrometers (μm) to 50 micrometers (μm) is used as a material, even when a plurality of stacked structures are formed, an antenna substrate in the form of a thin plate can be manufactured.

In the conventional wireless charging antenna device, a plurality of wires are attached to a circuit board, and a conductor wire is used as a bridge to connect the start and end points of the wire.

In addition, in order to couple the circuit board and wires to a module of a mobile device (such as a mobile phone or the like), a connector may be coupled to the circuit board to connect the module of the mobile device to the circuit board and similar components. Here, the connecting member may be a substrate formed as a printed circuit board (PCB), may be coupled to the lower part of the circuit substrate, and may be connected to a wire and a wire as a bridge.

However, when the connector formed as a printed circuit board is coupled to the circuit substrate, the wireless charging antenna device becomes thicker, and therefore, the mobile device to which the wireless charging antenna device is applied becomes thicker.

The present invention aims to provide a wire-parallel embedded wireless charging antenna. The wireless charging antenna is manufactured through a hybrid process. In the hybrid process, a plurality of wires are embedded in parallel at a predetermined depth in an antenna substrate and have one of predetermined dimensions. A hole is formed at one end position of the parallel embedded wires, and then a thin metal plate member passes through the formed hole to connect the wire to a charging circuit unit at a starting position of the wire, thereby improving the charging efficiency of the wireless charging antenna.

The present invention also aims to provide a wire-parallel embedded wireless charging antenna, in which the overlapping part of a wire is bridged and processed into a thin copper foil to reduce the thickness of the overlapping part, thereby using the antenna in a thin electronic device, minimizing the number of manufacturing processes The increase in the antenna leads to errors in the manufacturing process, and improves the manufacturing yield of the antenna.

According to an embodiment of the present invention, a wire-parallel embedded wireless charging antenna is a hybrid wireless charging antenna. The wire-parallel embedded wireless charging antenna includes: a substrate; a coil member; and a charging circuit unit, wherein The coil member is wound in a structure in which a plurality of wires are parallel and embedded in a predetermined depth in a substrate formed in a planar structure, and a thin metal plate member spans one end position of the wires embedded in parallel Pass the wires, and connect the coil component to the charging circuit unit at a starting position of the wires on the opposite side to form a wireless charging Electric antenna.

The wire parallel embedded wireless charging antenna is formed in the structure, wherein the coil member is connected to the thin metal plate member at the end position of the wires embedded in parallel, and the thin metal plate member straddles the wires and is pressed into the parallel embedded wire. The upper part of the wires extends to the starting position of the opposite side and is connected to the charging circuit unit.

The wire-parallel embedded wireless charging antenna is formed in the structure, wherein a connecting hole with a predetermined size is formed in the substrate at the end position of the wires embedded in parallel, and a through hole is formed at the starting point of the wires In the substrate at the position, the coil member is connected to one side of the thin metal plate member located on the bottom of one of the substrates through a connection hole, and the other side of the thin metal plate member passes through the through hole to extend to one of the substrates Connect the charging circuit unit to the top.

A wire-parallel embedded wireless charging antenna is formed in the structure, wherein a through hole is formed in the substrate at the starting point of the wires embedded in parallel, and the coil member is connected to the thin metal plate at the end position of the wires On one side of the member, the thin metal plate member straddles the wires and is pressed on the upper part of the parallel embedded wires to extend to the starting point of the opposite side, and the other side of the thin metal plate member passes through The through hole is located at the bottom of one of the substrates and is connected to the charging circuit unit.

A wire-parallel embedded wireless charging antenna is formed in the structure, wherein a connecting hole with a predetermined size is formed in the substrate at the end position of the wires embedded in parallel, and the coil member is connected to the substrate through the connecting hole A thin metal plate member on the bottom, and the thin metal plate member extends to the starting position of the wires and is connected to the charging circuit unit.

The thin metal plate member or a conductive wire is formed as a flat coil.

The coil member has a resistance value between 300mΩ and 500mΩ.

A coil member having inductance value between 7 μ H to 12μH.

The start position and the end position of the connection substrate are cut with multiple parts of the thin metal plate member and the wires that overlap each other, so that the thickness of the thin metal plate member and the wires that overlap each other is formed as the thickness of one wire .

Wherein, the overlapping part of the thin metal plate member and the wire is cut into half.

Among them, any one of the welding method, the spark welding compression method, the laser method, and the ultrasonic method is used to join the wires embedded in parallel to the thin metal plate member or the conductive wire.

According to another embodiment of the present invention, a wire-parallel embedded wireless charging antenna includes: a substrate formed in the form of a thin plate; an antenna coil wound on the substrate with a predetermined depth embedded in the substrate, and It includes a first coil end where the winding starts to be wound, formed at an edge of the substrate, and a second coil end where the winding ends winding, formed at a central part of the substrate; a connecting coil, coupled to the antenna coil, and Extending to the lower surface of the substrate; and a connecting member that couples the substrate, and includes a first connecting part connected to the antenna coil and a second connecting part spaced apart from the first connecting part and connected to the connecting coil; wherein, the connection The coil is formed as a flat coil, and is pressed against and coupled to the lower surface of the substrate.

The substrate has a second through hole formed in the center portion of the substrate so that the second connection portion connecting the coil passes through the substrate to extend to the lower surface of the substrate.

The substrate has a first through hole formed in an edge of the substrate, so that the first connecting portion of the connecting coil penetrates the substrate to extend to an upper surface of the substrate.

The connecting coil passes through the second through hole and presses on and extends on the lower surface of the substrate; and the first connecting part of the connecting coil is coupled to the lower surface of the connecting member.

The connecting coil passes through the second through hole and presses on and extends on the lower surface of the substrate; and the first connecting part of the connecting coil passes through the first through hole to couple with an upper surface of the connecting member.

The plurality of coils are arranged horizontally in parallel so that the antenna coil is wound on the substrate in a spiral structure.

According to the present invention, because the electric bridge used to connect the starting position and the end of the plurality of wires is connected through the hole, the wireless antenna can be manufactured without increasing the thickness of the wire overlapping with the electric bridge, thereby improving the performance of the wireless charging antenna. The charging efficiency also reduces the manufacturing quality and manufacturing cost of the antenna.

In addition, according to the above of the present invention, because the overlapping part of the wire is bridged into a thin copper foil to reduce the thickness of the overlapping part, the antenna can be used in a thin electronic device, and the manufacturing process due to the increase in the number of processes can be minimized It can improve the manufacturing yield of the antenna.

1, 110: substrate

2: Coil component

3: Charging circuit unit

4. 4a-4n: wire

5: End position

6: Starting point

7: Thin metal plate components

9: Connection hole

10: Through hole

11: Charging part

111: first through hole

112: second through hole

120, 220: antenna coil

120a: the end of the first coil

120b: second coil end

121: Coil

122: NFC coil

123: MST coil

130: Connect the coil

130a, 140a: the first connection part

130a, 140b: second connection part

140: connector

230: Lower connection coil

The first figure shows a wire-parallel embedded wireless charging antenna according to an embodiment of the present invention.

The second figure is an explanatory diagram describing the first embodiment of the present invention.

The third figure is an explanatory diagram describing the second embodiment of the present invention.

The fourth figure is an explanatory diagram describing the third embodiment of the present invention.

The fifth figure is an explanatory diagram describing the fourth embodiment of the present invention.

The sixth figures (a) and (b) show explanatory diagrams of a welding structure according to another embodiment of the present invention.

The seventh figure shows a wire-parallel embedded wireless charging antenna according to another embodiment of the present invention.

The eighth figure depicts a wireless charging antenna according to another embodiment of the present invention, in which an antenna coil, a near field communication (NFC) coil, a magnetic security transmission (MST) coil, etc. are coupled to a substrate.

Figure ninth (a) is a diagram along the line A-A of Figure 8, which depicts the connection between an antenna coil and a connector according to another embodiment of the present invention through a connecting coil.

The ninth figure (b) is a diagram depicting the connection between the antenna coil and the connector through the connecting coil according to another embodiment of the present invention.

The tenth figure (a) and (b) describe the connection between the antenna coils formed on the two surfaces of the substrate and the connector by connecting the coils according to another embodiment of the present invention.

The advantages and features of the present invention and the methods for realizing these advantages and features will be clearly understood by referring to the embodiments described in detail with the figures below. However, the present invention is not limited to the following embodiments, but can be implemented in various different forms. Furthermore, the embodiments provided by the present invention are only to complete the disclosure of the present invention and allow those skilled in the art to understand the scope of the present invention. The invention is defined by the scope of the patent application. In this specification, the same reference numerals generally denote the same elements.

In the following description of the embodiments of the present invention, when it is determined that the detailed description of related well-known functions or configurations makes the gist of the present invention obscure, the detailed description will be omitted. In addition, the terms to be described below are terms defined by considering their functions in the embodiments of the present invention, and may be changed according to the intention or practice of users and operators. Therefore, the definition of terms must be based on the context of the entire specification of the present invention.

Hereinafter, the embodiments of the present invention will be described in detail with reference to the drawings.

The first figure shows a wire-parallel embedded wireless charging antenna according to an embodiment of the present invention. The second figure is an explanatory diagram describing the first embodiment of the present invention. The third figure is an explanatory diagram describing the second embodiment of the present invention. The fourth figure is an explanatory diagram describing the third embodiment of the present invention. The fifth figure is an explanatory diagram describing the fourth embodiment of the present invention. The sixth figures (a) and (b) show explanatory diagrams of a welding structure according to another embodiment of the present invention. The seventh figure shows a wire-parallel embedded wireless charging antenna according to another embodiment of the present invention. The eighth figure depicts a wireless charging antenna according to another embodiment of the present invention, in which an antenna coil, a near field communication (NFC) coil, a magnetic security transmission (MST) coil, etc. are coupled to a substrate. The ninth figure (a) is a diagram along the line AA of the eighth figure, which depicts the connection between the antenna coil and the connector according to another embodiment of the present invention through the connecting coil; the ninth figure (b ) Is a diagram depicting the connection between the antenna coil and the connecting member through the connecting coil according to another embodiment of the present invention. The tenth figure (a) and (b) describe the connection between the antenna coils formed on the two surfaces of the substrate and the connector by connecting the coils according to another embodiment of the present invention.

Referring to the first figure, the wireless charging antenna according to an embodiment of the present invention is applied to a wireless charging antenna device including a substrate 1, a coil member 2 and a charging circuit unit 3.

The substrate 1 may be the main body of the wireless charging antenna, and may be formed in the form of a thin plate. According to an embodiment of the present invention, the substrate 1 may have a thickness of 70 (micrometer) μm or more, and may be made of materials such as polytetrafluoroethylene resin, epoxy resin, phenol resin, or ceramics.

The charging circuit unit 3 is coupled to one side of the substrate 1, and the wireless charging antenna can be connected to one of the charging parts 11 of the mobile device through the charging circuit unit 3.

In the conventional antenna device, since the connector and the lower surface of the substrate are coplanar and coupled to the lower surface of the substrate, the overall thickness of the antenna device includes the thickness of the substrate, the thickness of the connector, etc., and therefore tends to increase.

However, in the wireless charging antenna according to an embodiment of the present invention, the charging circuit unit 3 may be coplanar with one side of the substrate 1 and coupled to one side of the substrate 1, and a thin metal plate member 7 Or the conductor wire (not shown) can be provided as a flat coil, thereby reducing the total thickness of the wireless charging antenna.

The coil member 2 may be wound on the substrate 1 at predetermined intervals to be embedded in the substrate 1 to a predetermined depth, and may be formed of a plurality of wires 4a-4n. Here, each of the plurality of wires 4a-4n may be a wire having a circular cross section, and the plurality of wires 4a-4n may be arranged on the substrate 1 horizontally in parallel to form the coil member 2.

According to an embodiment of the present invention, the coil member 2 can be wound from one side of the substrate 1 and can be wound in a direction from this side (or edge portion) toward the central portion of the substrate 1 to form a spiral structure. In addition, the coil member 2 is wound at a predetermined interval distance. Since the electromagnetic induction effect can be improved as the number (amount) of winding increases, the interval between the winding coil members 2 can be minimized.

According to an embodiment of the present invention, a plurality of wires 4a-4n may be provided in the form of being embedded in the substrate 1. When the multiple wires 4a-4n are not attached to the substrate 1, but are fused to the substrate 1 in the form of being embedded in a predetermined depth, the total thickness of the wireless charging antenna can be reduced, thereby reducing the application of the wireless charging antenna to it. The thickness of a mobile device or similar device.

The coil member 2 may be wound in a receiving unit in which a voltage is induced according to environmental electromagnetic changes, or may be installed in a transmission unit for wirelessly transmitting an induced current. The charging circuit unit 3 for charging the battery of the mobile device may be connected to the output terminals at both ends of the coil member 2.

The coil component 2 of the present invention is wound in a structure, in which a plurality of wires 4a-4n are parallel and embedded in a substrate 1 formed in a planar structure at a predetermined depth, as shown in the second to fifth figures. The thin metal plate member 7 or the conductor wire (not shown) is attached to pass through the wires 4a-4n at the end position 5 of the parallel embedded wires 4a-4n, and at the start position 6 of the wires 4a-4n on the opposite side The coil component 2 is connected to the charging circuit unit 3, so as to manufacture a wireless charging antenna through a hybrid process.

Here, the coil member 2 is a wire having a shape with a circular cross-sectional area and made of, for example, a copper material. The coil member 2 is wound by connecting at least two or more parallel wires, and The start position 6 and the end position 5 of the coil component 2 are electrically connected, so that two or more wires are electrically connected in parallel. The coil member 2 has a resistance value between 300 mΩ and 500 mΩ, and an inductance value between 7 μH and 12 μH.

The thin metal plate member 7 or the conductive wire (not shown) according to an embodiment of the present invention is used to connect the coil member 2 and the charging circuit unit 3 (that is, the electric bridge connection process), and in particular, can also be formed as Flat coil with quadrilateral cross section.

Generally speaking, the connector can be coupled to the lower surface of the radio frequency identification (RFID) substrate on which the antenna pattern is formed, and the antenna of the mobile phone and the charging part (not shown) can be connected through the connector. The connector is mainly provided as a flexible printed circuit board (FPCB), and may be formed to have a thickness of about 100 micrometers (μm) to 130 micrometers (μm).

On the other hand, when the thin metal plate member 7 or the conductor wire (not shown) according to an embodiment of the present invention is formed as a rectangular-shaped flat coil having a thickness of 30 micrometers (μm) to 50 micrometers (μm), The thin metal plate member 7 or the conductor wire may be thinner than a conventional connector formed as an FPCB. Therefore, the substrate 1 according to an embodiment of the present invention can be significantly thinner than the substrate coupled by the conventional connector.

In addition, a coil or wire with a circular cross section can be in point contact with the substrate. However, since a flat coil having a rectangular cross section can be in contact with the surface of the substrate 1, the contact area where the thin metal plate member 7 or the conductor wire (not shown) contacts the substrate 1 can be formed to be wide. Therefore, the thin metal plate member 7 Or a conductor wire (not shown) can be effectively attached to the substrate 1.

Here, embodiments of the present invention will be described in more detail.

In the wireless charging antenna according to the first embodiment of the present invention, as shown in the second figure, a plurality of wires are provided as one conductor, wherein the plurality of wires have a hybrid film structure for connecting the parallel embedded wires of the coil member 2 When the terminal of the controller (the so-called finger PCB) and the antenna are coplanar, a conductor wire (not shown) crosses the wire at the end position 5 4a-4n are simultaneously pressed on the upper part of the multiple wires 4a-4n embedded in parallel, and are connected to the charging circuit unit 3 at the starting position 6 on the opposite side, thereby forming the structure of a wireless charging antenna.

In addition, in the second embodiment of the present invention, as shown in the third figure, the coil member 2 is connected from the end position 5 of the intersection to the start position 6 on the top of the antenna substrate 1 through the bottom surface of the antenna substrate 1.

In other words, the coil member 2 is wound in a structure in which a plurality of wires 4a-4n are parallel and embedded in the substrate 1 at a predetermined depth. After the connecting hole 9 having a predetermined size is formed at the terminal position 5 of the parallel embedded wires 4a-4n, the coil member 2 is connected to the thin metal plate member 7 located on the bottom of the substrate 1 through the formed connecting hole 9, and the thin metal The other side of the plate member 7 is connected to the charging circuit unit 3 at the starting point 6 of the wires 4a-4n on the top of the antenna substrate 1 through a through hole 10 formed on one side of the substrate 1, thereby being formed by a hybrid process The structure of the wireless charging antenna. More specifically, as shown in the third figure, the thin metal plate member 7 located on the bottom of the substrate 1 is connected to the coil member 2 through the connection hole 9, through the through hole 10 formed in the substrate 1, and is connected to the substrate 1 The upper part. In addition, the size of the connection hole 9 is formed in proportion to the size of the wires 4a-4n to be connected.

In addition, in the third embodiment of the present invention, as shown in FIG. 4, the coil member 2 is connected to the end position 5 of the intersection and the bottom of the antenna substrate 1 through the top surface of the antenna substrate 1.

When the controller terminal (or finger PCB) is present on the other surface (lower surface) on which the antenna is arranged on the other surface, the coil member 2 is wound on the plurality of wires 4a-4n in parallel and embedded in the substrate In a structure of one of the predetermined depths in 1. A through hole 10 is formed at the start position 6 of the embedded parallel wires 4a-4n, and the coil member 2 is connected to one side of the thin metal plate member 7 at the end position 5 of the plurality of wires 4a-4n. When the upper part of the plurality of wires 4a-4n is pressed down, it crosses the wires 4a-4n and extends to the starting position 6 on the opposite side, and the other side of the thin metal plate member 7 is positioned on the bottom of the substrate 1 through the through hole 10 And it is connected to one of the controller terminals of the charging circuit unit 3, so as to form a structure of a wireless charging antenna by mixing.

Meanwhile, in the fourth embodiment of the present invention, as shown in the fifth figure, the coil component 2 The end position 5 of the intersection is connected to the bottom of the antenna substrate 1 through the bottom surface of the antenna substrate 1.

When the controller terminal (or finger PCB) is present on the other surface (lower surface) different from the one surface of which the antenna is arranged, the coil member 2 is wound on the plurality of wires 4a-4n in parallel and embedded in the substrate In a structure of one of the predetermined depths in 1. A connecting hole 9 having a predetermined size is formed at the end position 5 of the embedded parallel wire, the coil member 2 passes through the connecting hole 9 to be connected to the thin metal plate member 7 located on the bottom of the substrate 1, and the thin metal plate member 7 extends Go to the starting position 6 of the wire and connect to the controller terminal of the charging circuit unit 3 to form a wireless charging antenna structure through a hybrid process. In addition, the size of the connecting hole 9 is formed in proportion to the size of the wires 4a-4n to be connected.

Meanwhile, in another embodiment of the present invention, as shown in Figure 6 (a) and (b), the inside of a structure includes a plurality of embedded parallel wires 4a-4n and a thin metal plate member 7 or overlapping wires The conductor wires (not shown) above 4a-4n are cut to a predetermined size, and for example, the overlapped portion of the thin metal plate member 7 or the wire 4 is cut to have the thickness of one wire. In other words, since the overlapped portions are each cut in half, for example, when the cut overlapped portions are coupled to each other, the cross section maintains the thickness of one wire. In other words, when the overlapping portion of the thin metal plate member 7 and the wire 4 is slotted to a thickness of 1/2 and then insulated and coupled to each other, its total thickness becomes 1+ thickness of the insulating film, thereby constituting a total thin thickness Wireless charging antenna.

At the same time, in another embodiment of the present invention, when one end of the wire antenna is connected to a thin plate for crossing or a patch connected to the thin plate, the end of the wire antenna and the thin plate for crossing or a patch are connected The chips can be joined by a connecting method, such as 1) welding method, 2) spark welding compression welding method, 3) welding method using laser, or 4) welding method using ultrasonic to form a wireless charging antenna .

In addition, in the wireless charging antenna 100 equipped with a connecting coil according to other embodiments of the present invention, the first through hole 111, the first coil end 120a, the first connecting portion 130a, etc. may be located at one edge of the substrate 110 , And the second through hole 112, the second coil end 120b, the second connection portion 130b, etc. may be positioned in the central portion of the substrate.

Referring to the seventh to tenth figures, according to some embodiments of the present invention, the wireless charging antenna 100 equipped with a connecting coil may include a substrate 110, an antenna coil 120, a connecting coil 130, a connecting member 140, and the like.

The substrate 110 may be the main body of the wireless charging antenna 100, and may be formed in the form of a thin plate.

According to another embodiment of the present invention, the substrate 110 may have a thickness of 70 microns (μm ) or more, and may be made of materials such as Teflon resin, epoxy resin, phenol resin, or ceramics. production.

The antenna coil 120 may be formed on one surface (or upper surface) of the substrate 110, and the connecting coil 130 connected to the antenna coil 120 may extend to the other surface (or lower surface) of the substrate 110 and be connected to the connector 140.

In the conventional antenna device, since the connecting member is vertically coupled to the lower surface of the substrate, the thickness of the antenna device includes the thickness of the entire substrate, the thickness of the connecting member, etc., so the thickness tends to increase.

However, in the wireless charging antenna 100 according to another embodiment of the present invention, the connecting member 140 may be coplanar with an edge of the substrate 110 and coupled to the edge of the substrate 110, and the connecting member 140 and the antenna coil 120 may pass through The connection coil 130 provided as a flat coil is connected, thereby reducing the overall thickness of the wireless charging antenna 100.

According to another embodiment of the present invention, the first through hole 111 may be formed in the edge of the substrate 110, and the connecting coil 130 connected to the antenna coil 120 may be arranged to extend from the lower surface of the substrate 110 and move onto the substrate 110 surface.

The second through hole 112 may be formed in the central portion of the substrate 110, and the connecting coil 130 connected to the antenna coil 120 may be provided to extend to the lower surface of the substrate 110. In addition, when the antenna coil 120 itself passes through the second through hole 112 and the antenna coil 120 and the connecting coil 130 are connected When the substrate 110 is on the lower surface, the second through hole 112 may have a size, width, etc., such that the plurality of coils 121 pass through the second through hole 112.

According to another embodiment of the present invention, as shown in Figure 8, because the NFC coil 122 used for NFC communication and the like is formed on the substrate 110, the pairing of mobile devices can be performed, the transportation card can be recognized, and the Store coupons during shopping to provide convenience in life. In addition, since the MST coil 123 for MST and the like is formed, a mobile device can be used for mobile payment.

The antenna coil 120 is wound on the substrate 110 at predetermined intervals to be embedded in the substrate 110 to a predetermined depth. The first coil end 120a at the beginning of the winding and the second coil end 120b at the end of the winding are formed.

According to another embodiment of the present invention, the antenna coil 120 may be formed as a plurality of coils 121.

Here, each of the plurality of coils 121 may be a wire having a circular cross section, and the plurality of coils 121 may be horizontally and parallelly arranged on the surface of the substrate 110 to form the antenna coil 120.

According to another embodiment of the present invention, the antenna coil may be wound from an edge of the substrate 110, and may be wound in a direction from the edge (or edge portion) toward the central portion of the substrate 110 to form a spiral structure. In addition, the antenna coil 120 is wound at a predetermined interval distance. Since the electromagnetic induction effect can be improved as the number of windings increases, the interval between the wire-wound antenna coil 120 can be minimized.

According to an embodiment of the present invention, the plurality of coils 121 may be provided in the form of being embedded in the substrate 110. When the plurality of coils 121 are not attached to the substrate 110 but are fused to the substrate 110 in the form of being embedded to a predetermined depth, the total thickness of the wireless charging antenna 100 can be reduced, thereby reducing the mobile device or the like to which the wireless charging antenna 100 is applied. thickness of.

According to another embodiment of the present invention, the first coil end 120a of the winding of the antenna coil 120 starting from the edge of the substrate 110 can be directly connected to the connector 140, and the winding of the antenna coil 120 ends at the central part of the substrate 110 The second coil end 120 b may be coupled to the connecting coil 130, and the connecting coil 130 may be coupled to the connecting piece 140 so that the second coil end 120 b may be connected to the connecting piece 140.

The connecting coil 130 is coupled to the antenna coil 120 and may extend on the lower surface of the substrate 110.

The connecting coil 130 according to another embodiment of the present invention may be formed as a flat coil. The flat coil is a coil having a rectangular cross section, and the connecting coil 130 formed as a flat coil may be extended by being fused to the lower surface of the substrate 110.

Generally speaking, the connector can be coupled to the lower surface of the substrate on which the antenna pattern is formed, and the antenna and the charging part (not shown) of the mobile device can be connected through the connector. The connection member is mainly formed as an FPCB and has a thickness of about 100 micrometers (μm) to 130 micrometers (μm).

On the other hand, the connecting coil 130 according to an embodiment of the present invention may be formed as a flat coil having a rectangular cross section, and the cross section of the connecting coil 130 may be formed to have a thickness of 30 micrometers (μm) to 50 micrometers (μm) . Therefore, the connection coil 130 may be thinner than a conventional connector formed as an FPCB. Therefore, according to an embodiment of the present invention, the substrate 110 to which the connection coil 130 is coupled can be significantly thinner than the substrate to which the conventional connector is coupled.

In addition, a coil with a circular cross section can be in point contact with the substrate. However, since a flat coil having a rectangular cross section can contact the surface of the substrate 110, when the connection coil 130 is configured as a flat coil, a contact area where the connection coil 130 contacts the substrate 110 can be formed wide, and therefore, the connection coil 130 can be effectively attached to the substrate 110.

According to another embodiment of the present invention, the two ends of the connecting coil 130 may be formed This is to couple to the second connection part 130b of the antenna coil 120 at the central part of the substrate and the first connection part 130a to be coupled to the connector 140 at the edge of the substrate 110.

That is, the second connecting portion 130b of the connecting coil 130 can be coupled to the second coil end 120b of the antenna coil 120, and the first connecting portion 130a of the connecting coil 130 can be connected to the connector 140, thereby connecting the antenna coil 120 and Coil 130, connector 140 and other components.

According to another embodiment of the present invention, the connection structure between the antenna coil 120 and the connecting member 140 may be formed differently according to the position where the first connecting portion 140a and the second connecting portion 140b are coupled on the connecting member 140 (for reference, the connection The first connecting portion 140a and the second connecting portion 140b of the member 140 are components of the connecting member 140, which are provided to be coupled to the charging portion (not shown) of the mobile phone).

According to another embodiment of the present invention, as shown in FIG. 9(a), the first connection part 140a may be formed on the connection member 140 so as to be coplanar with the antenna coil 120, and the second connection part 140b may be formed on On the surface of the connection member 140, the surface is opposite to a surface on which the antenna coil 120 is disposed, and may be positioned to be spaced apart from the first connection portion 140a. In other words, the first connection part 140 a may be formed on the upper surface of the connection member 140, and the second connection part 140 b may be formed on the lower surface of the connection member 140.

In this case, the connecting coil 130 may be coupled to the second coil end 120b of the antenna coil 120 at the center portion of the upper surface of the substrate 110, may extend downward through the second through hole 112, and then may be fused to the substrate The lower surface of 110 extends to the second connecting portion 140 b of the connecting member 140.

As described above, the connecting coil 130 extending from the lower surface of the substrate 110 may be coupled to the second connecting portion 140 b formed on the lower surface of the connecting member 140.

According to another embodiment of the present invention, as shown in FIG. 9(b), the first connecting portion 140a may be formed on the connecting member 140 to be coplanar with the antenna coil 120, and the second connecting portion 140b may also be formed on the connecting member 140. The piece 140 is on top and is coplanar with the antenna coil 120. In other words, the first connection portion 140a and the second connection portion 140b may be positioned as the surface on which the connection member 140 is disposed. Spaced apart from each other on the same plane.

In this case, the connecting coil 130 may be coupled to the second coil end 120b of the antenna coil 120 at the central portion of the upper surface of the substrate 110, may extend downward through the second through hole 112, and then may be fused to the substrate The lower surface of 110 extends to the second connecting portion 140 b of the connecting member 140.

As described above, the connecting coil 130 extending from the lower surface of the substrate 110 may extend to the upper surface of the substrate 110 again through the first through hole 111, and then may be coupled to the second connecting portion 140b of the connecting member 140.

In other words, another embodiment of the present invention has a form in which the antenna coil 120 and the connecting coil 130 are connected on the upper surface of the substrate 110, and the connected connecting coil 130 passes through the second through hole 112.

In addition, the antenna coil 120 itself can pass through the second through hole 112 to extend to the lower surface of the substrate 110, and the second connecting portion 130b of the connecting coil 130 and the second coil end 120b of the antenna coil 120 can be coupled to the substrate 110. On the lower surface, the connecting coil 130 is connected to the second connecting portion 140b of the connecting member 140, so that the antenna coil 120 is connected to the charging portion (not shown) of the mobile phone.

According to another embodiment of the present invention, the antenna coil 120 may be formed on both surfaces of the substrate 110 as shown in the tenth figure (a) and (b). In this embodiment, the components provided on the upper surface of the substrate 110 and the components provided on the lower surface will be described by adding “upper” and “lower” in front of the components, respectively.

The upper connection coil 130 and the lower connection coil 230 may be formed such that the upper antenna coil 120 and the lower antenna coil 220 are connected to the connection member 140.

According to another embodiment of the present invention, as shown in the tenth figure (a), the second upper coil end 120b of the upper antenna coil 120 may be connected to the upper connecting coil 130, and the connected upper connecting coil 130 The upper antenna coil 120 that is wound may pass through (or straddle) to be coupled to the connector 140.

In this case, at a portion where the upper antenna coil 120 and the upper connection coil 130 overlap each other, the upper connection coil 130 may be insulated, and may overlap the upper antenna coil 120 while being pressed on the upper antenna coil 120. In addition, the upper connecting coil 130 is configured as a flat coil, thereby reducing the thickness of the wireless charging antenna 100 due to the overlap of the upper connecting coil 130.

In the above structure, the lower connection coil 230 may also overlap with the lower antenna coil 220 to be connected to the connection member 140.

As described above, when the upper connection coil 130 and the lower connection coil 230 respectively overlap the upper antenna coil 120 and the lower antenna coil 220 to be connected to the connector, the thickness of the wireless charging antenna 100 may be equivalent to that of the substrate 110 and the upper antenna coil 120. , The sum of the thicknesses of the upper connecting coil 130, the lower antenna coil 220, and the lower connecting coil 230.

On the other hand, according to another embodiment of the present invention, as shown in FIG. 10(b), the upper connecting coil 130 connected to the second upper coil end 120b of the upper antenna coil 120 may pass through the second through hole 112 And straddle the lower antenna coil 220 to be connected to the connecting member 140, or may straddle the lower antenna coil 220 and pass through the first through hole 111 to be connected to the connecting member 140. In this case, the upper connection coil 130 and the lower connection coil 230 that straddle the lower antenna coil 220 may be positioned to be horizontally spaced apart from each other by a predetermined interval.

As described above, in the example of forming the wireless charging antenna 100, the upper connecting coil 130 and the lower connecting coil 230 are made to straddle (through) the lower antenna coil 220 to be connected to the connecting member 140, and the thickness of the wireless charging antenna 100 is equivalent to The total thickness of the substrate 110, the upper antenna coil 120, the lower antenna coil 220, and the upper connection coil 130 (or the lower connection coil 230).

That is, the upper connecting coil 130 and the lower connecting coil 230 are positioned to be coplanar with each other (that is, positioned on one surface of the substrate 110), and the upper connecting coil 130 and the lower connecting coil 230 are respectively positioned on the substrate Compared with the form of the upper surface and the lower surface, the effect of further reducing the total thickness of the wireless charging antenna 100 can be obtained.

The connecting member 140 can be coupled to the substrate 110, and can connect the wireless charging antenna 100 to a charging part (not shown) or the like of a mobile phone.

According to another embodiment of the present invention, a plurality of connecting terminals may be provided on the connecting member 140. In particular, the first connecting portion 140a may be formed so that the first coil end 120a of the antenna coil 120 is connected to the first connecting portion, and the second connecting portion 140b may be formed so that the second connecting portion of the antenna coil 120 is The coil end 120b is connected to this second connection part.

The first connection part 140 a and the second connection part 140 b may be formed at positions spaced apart from each other on the connection member 140.

In other words, when the connecting coil 130 is coupled to the lower surface of the connecting member 140, the first connecting portion 140a may be formed on the upper surface of the connecting member 140, and the second connecting portion 140b may be disposed on the lower surface of the connecting member 140.

In addition, when the connecting coil 130 passes through the first through hole 111 to be coupled to the upper surface of the connecting member 140, the first connecting portion 140a may be formed on the upper surface of the connecting member 140, and the second connecting portion 140b may also be provided on the upper surface of the connecting member 140. On the upper surface of the connecting member 140 so as to be spaced from the first connecting portion 140a.

The components that perform the same or similar functions in one embodiment of the present invention described above and other embodiments are compared below.

The coil member 2 of one embodiment of the present invention and the antenna coil 120 of other embodiments are components that perform the same or similar functions. The charging circuit unit 3 and the connector 140, the multiple wires 4a-4n and the multiple coils 121, the end position of the wires 5 and the second coil end 120b, the start position of the wires 6 and the first coil end 120a, and the thin metal plate The member 7 and the connecting coil 130, the connecting hole 9 and the second through hole 112, and the through hole 10 and the first through hole 111 may be components that perform the same or similar functions in one embodiment and other embodiments of the present invention.

Although various embodiments of the present invention have been shown and described, the present invention is not necessarily limited thereto, and those skilled in the art will understand that various substitutions, modifications and changes can be made without departing from the spirit of the present invention.

1: substrate

2: Coil component

3: Charging circuit unit

4a-4n: wire

5: End position

7: Thin metal plate components

11: Charging part

Claims (17)

A wire-parallel embedded wireless charging antenna is a hybrid wireless charging antenna. The wire-parallel embedded wireless charging antenna includes: A substrate; A coil member; and A charging circuit unit, wherein the coil member is wound in a structure, wherein a plurality of wires are parallel and embedded in a predetermined depth of a substrate formed in a planar structure, and a thin metal plate member is embedded in parallel in the A terminal position of the wires crosses the wires, and a starting position of the wires on an opposite side connects the coil component to the charging circuit unit to form a wireless charging antenna. The wire parallel embedded wireless charging antenna according to claim 1, wherein the wire parallel embedded wireless charging antenna is formed in the structure, and the coil member is connected to the thin wire at the end position of the wires embedded in parallel A metal plate member, and the thin metal plate member straddles the wires and is pressed on the upper portion of the wires embedded in parallel to extend to the starting position of the opposite side and connect the charging circuit unit. The wire-parallel embedded wireless charging antenna according to claim 1, wherein the wire-parallel embedded wireless charging antenna is formed in the structure, and a connecting hole having a predetermined size is formed in the parallel embedded wires. In the substrate at the end position, a through hole is formed in the substrate at the starting point of the wires, and the coil member is connected to the thin metal plate member on a bottom of the substrate through the connection hole On one side, the other side of the thin metal plate member passes through the through hole to extend to the top of one of the substrates and is connected to the charging circuit unit. The wire-parallel embedded wireless charging antenna according to claim 1, wherein the wire-parallel embedded wireless charging antenna is formed in the structure, and a through hole is formed at the starting point of the wires embedded in parallel In the substrate, the coil component is connected to the end position of the wires One side of the thin metal plate member, which straddles the wires and is pressed on the upper part of the wires embedded in parallel to extend to the starting position of the opposite side, and the thin metal plate member The other side passes through the through hole and is located at a bottom of the substrate and is connected to the charging circuit unit. The wire-parallel embedded wireless charging antenna according to claim 1, wherein the wire-parallel embedded wireless charging antenna is formed in the structure, and a connecting hole having a predetermined size is formed in the parallel embedded wires. In the substrate at the end position, the coil member passes through the connecting hole to connect the thin metal plate member on the bottom of one of the substrates, and the thin metal plate member extends to the start position of the wires and is connected The charging circuit unit. The wire-parallel embedded wireless charging antenna according to any one of claims 2 to 5, wherein the thin metal plate member or a conductive wire is formed as a flat coil. The wire-parallel embedded wireless charging antenna according to claim 1, wherein the coil member has a resistance value between 300mΩ and 500mΩ. The wire according to a request item parallel embedded wireless charging antenna, wherein the member having a coil inductance value between 7 μ H to 12μH. The wire-parallel embedded wireless charging antenna according to claim 1, wherein the thin metal plate member and the portions of the wires that overlap each other at the start position and the end position of the substrate are cut so that the The thickness of the thin metal plate member and the wires that overlap each other is formed to the thickness of one wire. The wire parallel embedded wireless charging antenna according to claim 9, wherein the thin metal plate member and the overlapping portion of the wire are each cut into half. The wire parallel embedded wireless charging antenna according to claim 1, wherein any one of the welding method, the spark welding compression method, the laser method, and the ultrasonic method is used to join the parallel embedded wires to the Thin metal plate member or the conductor wire. A wire-parallel embedded wireless charging antenna includes: A substrate, formed in the form of a thin plate; An antenna coil is wound on the substrate to a predetermined depth embedded in the substrate, and includes a first coil end where the winding starts to be wound, formed at one edge of the substrate, and a second coil end where the winding ends to be wound Section, formed at a central part of the substrate; A connecting coil, coupled to the antenna coil, and extending to the lower surface of the substrate; and A connecting piece, coupled to the substrate, and comprising a first connecting part connected to the antenna coil and a second connecting part spaced apart from the first connecting part and connected to the connecting coil; Wherein, the connecting coil is formed as a flat coil, and is pressed against and coupled to the lower surface of the substrate. The wire-parallel embedded wireless charging antenna according to claim 12, wherein the substrate has a second through hole formed in the central portion of the substrate, so that the second connecting portion of the connecting coil passes through the substrate to Extend to the lower surface of the substrate. The wire-parallel embedded wireless charging antenna according to claim 13, wherein the substrate has a first through hole formed in an edge of the substrate, so that the first connection portion of the connecting coil passes through the substrate to extend To the upper surface of one of the substrates. The wire-parallel embedded wireless charging antenna according to claim 14, wherein the connecting coil passes through the second through hole and presses on and extends on the lower surface of the substrate; and, the first connection of the connecting coil Partly coupled to a lower surface of the connecting piece. The wire-parallel embedded wireless charging antenna according to claim 14, wherein the connecting coil passes through the second through hole and presses on and extends on the lower surface of the substrate; and, the first connection of the connecting coil Partially passes through the first through hole to couple with an upper surface of the connecting member. The wire-parallel embedded wireless charging antenna according to claim 15 or 16, wherein a plurality of coils are arranged horizontally in parallel, so that the antenna coil is wound on the substrate in a spiral structure.

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