Antenna coil structure and wireless charging device

Abstract

The utility model provides an antenna coil structure and a wireless charging device. The antenna coil structure is used for being installed in a device main body, the antenna coil structure is used for being electrically connected with an external power supply, and the antenna coil structure comprises a carrier layer which is provided with a connecting surface; the coil layer comprises an antenna body, the antenna body is radially and spirally wound from one end to the other end, and the antenna body is located in the connecting surface and connected with the carrier layer; the insulating layer covers the connecting surface and is respectively connected with the carrier layer and the antenna body. According to the antenna coil structure, the processing time of the antenna coil structure is short, and the processing cost is low.

Description

Technical Field

[0001] The present disclosure relates to the technical field of wireless charging devices, and particularly to an antenna coil structure and a wireless charging device. Background Art

[0002] A wireless charging device is a charging device that uses the principle of electromagnetic induction, relies on the propagation of electromagnetic waves, and converts the energy of electromagnetic waves into electrical energy to wirelessly charge electronic products such as mobile phones and digital cameras. Wireless charging devices are widely used in fields such as consumer electronics, smart home, new energy vehicles, medical devices, and military devices. A wireless charging device is composed of a device main body and an antenna coil structure, etc. The antenna coil structure is connected to the device main body, and the antenna coil structure is used to be electrically connected to an external power source.

[0003] In the prior art, a wireless antenna coil structure can be processed by a flexible circuit board. Through the flexible circuit board manufacturing process, the wireless antenna coil structure is formed on the flexible circuit board; in addition, the wireless antenna coil structure can also be processed by multi-strand copper winding.

[0004] However, due to the complexity of the flexible circuit board manufacturing process, it is difficult to form the structure of the wireless antenna coil structure on the flexible circuit board, resulting in a long processing time for the antenna coil structure; for multi-strand copper winding, the coil is usually obtained by mechanical winding or manual winding, resulting in a long processing time; the antenna coil structures obtained by the above two processing methods have a long processing time and a high processing cost. Utility Model Content

[0005] The purpose of the present disclosure is to overcome the deficiencies in the prior art and provide an antenna coil structure and a wireless charging device with a shorter processing time and a lower processing cost.

[0006] The purpose of the present disclosure is achieved by the following technical solutions:

[0007] An antenna coil structure for being installed in a device main body and for being electrically connected to an external power source, comprising:

[0008] A carrier layer provided with a connection surface;

[0009] A coil layer including an antenna body, the antenna body spirally surrounding radially from one end to the other end, and the antenna body is located within the connection surface and connected to the carrier layer;

[0010] An insulating layer covering the connection surface, and the insulating layer is respectively connected to the carrier layer and the antenna body.

[0011] In one embodiment, the antenna body is provided with a first connection and feeding portion and a second connection and feeding portion, and the antenna body spirally winds radially from the first connection and feeding portion to the second connection and feeding portion; the antenna coil structure further includes a first connection cable and a second connection cable, the first connection cable is connected to the first connection and feeding portion, the second connection cable is connected to the second connection and feeding portion, and both the first connection cable and the second connection cable are used for electrically connecting to an external power supply.

[0012] In one embodiment, the carrier layer is a polyimide substrate layer.

[0013] In one embodiment, the connection surface of the carrier layer includes a first connection surface and a second connection surface which are oppositely arranged, the number of coil layers is two, namely a first coil layer and a second coil layer, the antenna body of the first coil layer is located within the first connection surface and is connected to the carrier layer, the antenna body of the second coil layer is located within the second connection surface and is connected to the carrier layer, and one of the antenna bodies of the first coil layer and the second coil layer is respectively connected to the first connection cable and the second connection cable.

[0014] In one embodiment, the number of insulating layers is two, namely a first insulating layer and a second insulating layer, the first insulating layer covers the first connection surface, and the first insulating layer is respectively connected to the carrier layer and the antenna body of the first coil layer; the second insulating layer covers the second connection surface, and the second insulating layer is respectively connected to the carrier layer and the antenna body of the second coil layer.

[0015] In one embodiment, the shape formed by the antenna body spirally winding radially from one end to the other end is the same as the shape of the carrier layer.

[0016] In one embodiment, the first connection cable is welded to the first connection and feeding portion; the second connection cable is welded to the second connection and feeding portion.

[0017] In one embodiment, both the carrier layer and the insulating layer are integrally formed structures.

[0018] In one embodiment, the antenna body is adhesively bonded to the carrier layer and the insulating layer respectively.

[0019] A wireless charging device includes a device main body and the antenna coil structure according to any one of the above embodiments, the device main body is provided with a receiving cavity, and the antenna coil structure is located within the receiving cavity and is connected to the device main body.

[0020] Compared with the prior art, the present disclosure has at least the following advantages:

[0021] Since the antenna coil structure includes a carrier layer, a coil layer and an insulating layer, the carrier layer is provided with a connection surface; the coil layer includes an antenna body, the antenna body is located in the connection surface and connected to the carrier layer, the insulating layer covers the connection surface, and the insulating layer is connected to the carrier layer and the antenna body respectively. The insulating layer and the coil layer are connected on the side away from the carrier layer. During processing, the carrier layer, the antenna body and the insulating layer are all punched and formed by processing equipment, avoiding the winding operation of the coil in the prior art, thereby saving the processing time of the antenna body; at the same time, the antenna body is respectively bonded to the carrier layer and the insulating layer, making the molding of the antenna coil structure easier, avoiding the molding of the wireless antenna coil structure on the flexible circuit board, and further making the processing technology of the antenna coil structure simpler, thereby making the overall processing time of the antenna coil structure shorter. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present disclosure and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is a schematic diagram of a three-dimensional exploded structure of an antenna coil structure according to an embodiment;

[0024] Figure 2 It is a schematic diagram of a three-dimensional exploded structure of a double-layer antenna coil structure according to an embodiment. DETAILED DESCRIPTION

[0025] In order to facilitate the understanding of the present disclosure, the present disclosure will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present disclosure are given in the drawings. However, the present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present disclosure more thoroughly and comprehensively understood.

[0026] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present disclosure. The terms used herein in the specification of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0028] The present disclosure provides an antenna coil structure. The antenna coil structure is used to be installed in a device body, and the antenna coil structure is used to be electrically connected to an external power supply, and the antenna coil structure includes a carrier layer provided with a connection surface; the coil layer includes an antenna body, the antenna body radially spirally surrounds from one end to the other end, the antenna body is located in the connection surface and connected to the carrier layer; the insulation layer covers the connection surface, and the insulation layer is respectively connected to the carrier layer and the antenna body.

[0029] The above-mentioned antenna coil structure includes a carrier layer, a coil layer and an insulating layer, and the carrier layer is provided with a connection surface; the coil layer includes an antenna body, the antenna body is located in the connection surface and connected to the carrier layer, the insulating layer covers the connection surface, and the insulating layer is connected to the carrier layer and the antenna body respectively. The insulating layer and the coil layer are connected to the side away from the carrier layer. During processing, the carrier layer, the antenna body and the insulating layer are all punched and formed by processing equipment, avoiding the winding operation of the coil in the prior art, thereby saving the processing time of the antenna body; at the same time, the antenna body is respectively bonded to the carrier layer and the insulating layer, making the molding of the antenna coil structure easier, avoiding the molding of the wireless antenna coil structure on the flexible circuit board, and further making the processing technology of the antenna coil structure simpler, thereby making the overall processing time of the antenna coil structure shorter.

[0030] In order to better understand the technical solutions and beneficial effects of the present invention, the present invention is further described in detail below in conjunction with specific embodiments:

[0031] like Figure 1 As shown, an antenna coil structure 10 of an embodiment is used to be installed in a device body, and the antenna coil structure 10 is used to be electrically connected to an external power source. The antenna coil structure 10 includes a carrier layer 100 provided with a connection surface 110; the coil layer 200 includes an antenna body 210, and the antenna body 210 is radially spirally wound from one end to the other end. The antenna body 210 is located in the connection surface 110 and connected to the carrier layer 100; the insulating layer 300 covers the connection surface 110, and the insulating layer 300 is respectively connected to the carrier layer 100 and the antenna body 210. In this embodiment, the carrier layer 100, the coil layer 200 and the insulating layer 300 are connected in sequence to form a single-layer antenna coil structure 10.

[0032] The above-described antenna coil structure 10 includes a carrier layer 100, a coil layer 200, and an insulating layer 300. The carrier layer 100 is provided with a connection surface 110. The coil layer 200 includes an antenna body 210, and the antenna body 210 is located within the connection surface 110 and connected to the carrier layer 100. The insulating layer 300 covers the connection surface 110, and the insulating layer 300 is respectively connected to the carrier layer 100 and the antenna body 210. The insulating layer 300 is connected to the coil layer 200 on a surface facing away from the carrier layer 100. During processing, the carrier layer 100, the antenna body 210, and the insulating layer 300 are all die-cut by processing equipment, avoiding the winding operation of the coil in the prior art, thereby saving the processing time of the antenna body 210. At the same time, the antenna body 210 is bonded to the carrier layer 100 and the insulating layer 300 respectively, making the formation of the antenna coil structure 10 relatively simple. Avoiding forming the wireless antenna coil structure 10 on a flexible circuit board, thereby making the processing technology of the antenna coil structure 10 relatively simple, and thus making the overall processing time of the antenna coil structure 10 shorter.

[0033] As Figure 1 shown, in one embodiment, the antenna body 210 is provided with a first connection feeding portion 211 and a second connection feeding portion 212. The antenna body 210 spirally surrounds radially from the first connection feeding portion 211 to the second connection feeding portion 212. The antenna coil structure 10 further includes a first connection cable 400 and a second connection cable 500. The first connection cable 400 is connected to the first connection feeding portion 211, and the second connection cable 500 is connected to the second connection feeding portion 212. Both the first connection cable 400 and the second connection cable 500 are used for electrically connecting to an external power source. In this embodiment, the first connection cable 400 is connected to the first connection feeding portion 211, the second connection cable 500 is connected to the second connection feeding portion 212, and both the first connection cable 400 and the second connection cable 500 are used for electrically connecting to an external power source, enabling the antenna body 210 to be used for electrically connecting to an external power source.

[0034] As Figure 1 shown, in one embodiment, the carrier layer 100 is a polyimide base material layer. In this embodiment, the PI plastic layer has relatively good dielectric properties and relatively good thermal stability, so that when the antenna coil structure 10 is powered on, the influence of the PI plastic layer on the coil layer 200 is relatively small.

[0035] As Figure 2As shown, in one embodiment, the connection surface 110 of the carrier layer 100 includes a first connection surface 111 and a second connection surface (not shown in the figure) that are oppositely arranged. The number of coil layers 200 is two, namely a first coil layer 220 and a second coil layer 230. The antenna body of the first coil layer 220 is located within the first connection surface 111 and is connected to the carrier layer 100. The antenna body of the second coil layer 230 is located within the second connection surface and is connected to the carrier layer 100. One of the antenna bodies of the first coil layer 220 and the antenna body of the second coil layer 230 is respectively connected to the first connection cable 400 and the second connection cable 500. In this embodiment, the antenna body of the first coil layer 220 is located within the first connection surface 111 and is connected to the carrier layer 100. The antenna body of the second coil layer 230 is located within the second connection surface and is connected to the carrier layer 100 to form a double-layer antenna coil structure 10.

[0036] As Figure 2 shown, in one embodiment, the number of insulating layers 300 is two, namely a first insulating layer 310 and a second insulating layer 320. The first insulating layer 310 covers the first connection surface 111 and is respectively connected to the carrier layer 100 and the antenna body of the first coil layer 220. The second insulating layer 320 covers the second connection surface and is respectively connected to the carrier layer 100 and the antenna body of the second coil layer 230. In this embodiment, the first insulating layer 310 covers the first connection surface 111 and is respectively connected to the carrier layer 100 and the antenna body of the first coil layer 220. The second insulating layer 320 covers the second connection surface and is respectively connected to the carrier layer 100 and the antenna body of the second coil layer 230 to form a double-layer antenna coil structure 10. Among them, both the first insulating layer 310 and the insulating layer 300 are polyethylene terephthalate layers. Further, the polyethylene terephthalate layer has good gas barrier and water barrier properties to protect the coil layer 200 and reduce the influence of gases and moisture in the air on the coil layer 200. At the same time, the polyethylene terephthalate layer also has good electrical insulation properties.

[0037] As Figures 1 to 2 shown, in one embodiment, the shape formed by the antenna body 210 spirally surrounding radially from one end to the other end is the same as the shape of the carrier layer 100. In this embodiment, the shape formed by the antenna body 210 spirally surrounding radially from one end to the other end is the same as the shape of the carrier layer 100. The shape formed by the antenna body 210 can be circular, square or oval so that the shape formed by the antenna body meets the corresponding electrical performance.

[0038] As Figure 1As shown, in one embodiment, the first connection cable 400 is welded to the first connection feeder 211; the second connection cable 500 is welded to the second connection feeder 212. In this embodiment, the first connection cable 400 is welded to the first connection feeder 211; the second connection cable 500 is welded to the second connection feeder 212, so that the connection stability of the first connection cable 400 welded to the first connection feeder 211 and the second connection cable 500 welded to the second connection feeder 212 is better.

[0039] like Figure 1 As shown, in one embodiment, the carrier layer 100 and the insulating layer 300 are both integrally formed structures. In this embodiment, the integrally formed structure makes the antenna coil structure 10 more compact and smaller in size.

[0040] like Figures 1 to 2 As shown, in one embodiment, the antenna body 210 is respectively bonded to the carrier layer 100 and the insulating layer 300. In this embodiment, the cost of adhesive connection is low and the processing technology is simple, so that the processing technology of the antenna coil structure 10 is simple.

[0041] The present disclosure further provides a wireless charging device, including a device body and the antenna coil structure 10 of any of the above embodiments, wherein the device body is provided with a storage cavity, and the antenna coil structure 10 is located in the storage cavity and connected to the device body.

[0042] Compared with the prior art, the present invention has at least the following advantages:

[0043] Since the antenna coil structure 10 includes a carrier layer 100, a coil layer 200 and an insulating layer 300, the carrier layer 100 is provided with a connecting surface 110; the coil layer 200 includes an antenna body 210, the antenna body 210 is located in the connecting surface 110 and is connected to the carrier layer 100, and the insulating layer 300 covers the connecting surface 110, and the insulating layer 300 is respectively connected to the carrier layer 100 and the antenna body 210. The insulating layer 300 and the coil layer 200 are connected at a side away from the carrier layer 100. During processing, the carrier layer 100, the antenna body 210 and the insulating layer 300 are all punched and formed by processing equipment, avoiding the winding operation of the coil in the prior art, thereby saving the processing time of the antenna body 210; at the same time, the antenna body 210 is respectively bonded to the carrier layer 100 and the insulating layer 300, so that the forming of the antenna coil structure 10 is simpler, avoiding the forming of the wireless antenna coil structure 10 on a flexible circuit board, and thus making the processing technology of the antenna coil structure 10 simpler, thereby shortening the overall processing time of the antenna coil structure 10.

[0044] The above-described embodiments merely represent several implementation manners of the present disclosure. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the disclosed patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present disclosure, several modifications and improvements can still be made, and these all fall within the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure patent shall be subject to the appended claims.

Claims

1. An antenna coil structure, for installation in a device body, and the antenna coil structure is for electrical connection with an external power source, characterized in that: The antenna coil structure comprises: A carrier layer provided with a connection surface; The coil layer comprises an antenna body, the antenna body radially spirally winding from one end to the other end, the antenna body being located in the connection surface and connected to the carrier layer; An insulating layer covers the connection surface, and the insulating layer is respectively connected to the carrier layer and the antenna body.

2. The antenna coil structure according to claim 1, characterized in that: The antenna body is provided with a first connection feed part and a second connection feed part, and the antenna body radially spirals from the first connection feed part to the second connection feed part; the antenna coil structure also includes a first connection cable and a second connection cable, the first connection cable is connected to the first connection feed part, and the second connection cable is connected to the second connection feed part, and the first connection cable and the second connection cable are both used to be electrically connected to the external power supply.

3. The antenna coil structure according to claim 1, characterized in that: The carrier layer is a polyimide substrate layer.

4. The antenna coil structure according to claim 2, characterized in that: The connecting surface of the carrier layer includes a first connecting surface and a second connecting surface which are arranged opposite to each other. The number of the coil layers is two, namely the first coil layer and the second coil layer. The antenna body of the first coil layer is located in the first connecting surface and connected to the carrier layer. The antenna body of the second coil layer is located in the second connecting surface and connected to the carrier layer. One of the antenna bodies of the first coil layer and the second coil layer is connected to the first connecting cable and the second connecting cable respectively.

5. The antenna coil structure according to claim 4, characterized in that: There are two insulating layers, namely a first insulating layer and a second insulating layer. The first insulating layer covers the first connecting surface, and the first insulating layer is respectively connected to the carrier layer and the antenna body of the first coil layer; the second insulating layer covers the second connecting surface, and the second insulating layer is respectively connected to the carrier layer and the antenna body of the second coil layer.

6. The antenna coil structure according to claim 1, characterized in that: The shape of the antenna body formed by radially spirally winding from one end to the other end is consistent with the shape of the carrier layer.

7. The antenna coil structure according to claim 2, characterized in that: The first connection cable is welded to the first connection feeder; and the second connection cable is welded to the second connection feeder.

8. The antenna coil structure according to claim 1, characterized in that: The carrier layer and the insulating layer are both integrally formed structures.

9. The antenna coil structure according to claim 1, characterized in that: The antenna body is bonded to the carrier layer and the insulating layer respectively.

10. A wireless charging device, characterized in that: It comprises a device body and the antenna coil structure as described in any one of claims 1 to 9, wherein the device body is provided with a storage cavity, and the antenna coil structure is located in the storage cavity and connected to the device body.

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