CN212323205U

CN212323205U - NFC antenna structure and mobile terminal

Info

Publication number: CN212323205U
Application number: CN202022165845.XU
Authority: CN
Inventors: 叶剑
Original assignee: Guangdong Genius Technology Co Ltd
Current assignee: Guangdong Genius Technology Co Ltd
Priority date: 2020-09-28
Filing date: 2020-09-28
Publication date: 2021-01-08
Anticipated expiration: 2030-09-28

Abstract

The embodiment of the utility model discloses NFC antenna structure and mobile terminal, include: the NFC antenna assembly comprises a plurality of shells and NFC antenna assemblies which are stacked in sequence, wherein at least two adjacent shells are provided with abutting surfaces which abut against each other relatively, and the NFC antenna assemblies are arranged on any one of the abutting surfaces. A plurality of casings are stacked in sequence, at least two adjacent casings are provided with binding surfaces which are mutually abutted relatively, and the NFC antenna assembly is not located inside the whole mobile terminal on the binding surface of any casing of the NFC antenna assembly, so that the space inside the whole mobile terminal is saved. The technical problem that the mobile terminal occupies the internal space of the mobile terminal due to the arrangement of the NFC antenna in the prior art is solved.

Description

NFC antenna structure and mobile terminal

Technical Field

The utility model relates to an electronic equipment's technical field especially relates to a NFC antenna structure and mobile terminal.

Background

Nowadays, mobile terminals with metal backshells are more and more commonly used, antennas are devices used for receiving and transmitting signals in the mobile terminals, Near Field Communication (NFC) antennas can achieve Near Field Communication of the mobile terminals, at present, the NFC antennas are usually built in metal shells of the mobile terminals, and for example, FPCs (flexible circuit boards) are attached to the backs of screens to form NFC antennas, so that the internal space of the mobile terminals is occupied.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a NFC antenna structure and mobile terminal to solve among the prior art mobile terminal and occupy the technical problem of mobile terminal inner space because of setting up the NFC antenna.

To this end, according to a first aspect, an embodiment provides an NFC antenna structure comprising: the NFC antenna assembly comprises a plurality of shells and NFC antenna assemblies which are stacked in sequence, wherein at least two adjacent shells are provided with abutting surfaces which abut against each other relatively, and the NFC antenna assemblies are arranged on any one of the abutting surfaces.

As an improvement, the casing includes that framework and lid are established display screen in the framework, the display screen includes the display area and centers on the fixed area of display area, the framework have with the relative first binding face of fixed area, the fixed area have with the relative second binding face of framework, the NFC antenna module sets up first binding face or on the second binding face.

As an improvement, the casing still includes to cover and establishes display screen apron on the display screen, display screen apron include with the transparent district that the display area corresponds with around the ink district of transparent district, the ink district have with the third laminating face that the display screen is relative, the fixed area have with the fourth laminating face that the ink district is relative, the NFC antenna module sets up third laminating face or on the fourth laminating face.

As an improvement, the frame body comprises a bottom frame and a middle frame clamped between the bottom frame and the display screen, the bottom frame is provided with a fifth binding surface opposite to the middle frame, and the middle frame is provided with a sixth binding surface opposite to the bottom frame; one end of the bottom frame far away from the middle frame forms the first binding face, and the NFC antenna assembly is arranged on the fifth binding face or the sixth binding face.

As an improvement, the NFC antenna assembly includes an antenna line in a coil structure, and the number of turns of the antenna line is at least two.

As an improvement, the antenna circuit includes a first feeding point, a second feeding point, a first loop of wiring, a second loop of wiring, and a transition portion, where the starting end of the first loop of wiring is provided with the first feeding point, the tail end of the second loop of wiring is provided with the second feeding point, the transition portion is connected between the tail end of the first loop of wiring and the starting end of the second loop of wiring, and the first feeding point and the second feeding point are respectively located at two sides of the transition portion.

As an improvement, the transition portion is vertically connected to the starting end of the second loop of wire to form a first accommodating space, the transition portion is vertically connected to the tail end of the first loop of wire to form a second accommodating space, the first feeding point is located in the first accommodating space, and the second feeding point is located in the second accommodating space.

As an improvement, the antenna circuit further includes a first positioning portion located in the first receiving space and connected to the first feeding point, and a second positioning portion located in the second receiving space and connected to the second feeding point.

As an improvement, the first positioning portion and the second positioning portion are in a cross-shaped or T-shaped structure.

According to a second aspect, an embodiment provides a mobile terminal comprising the NFC antenna structure of the first aspect.

The beneficial effects of the utility model reside in that: a plurality of casings are stacked in sequence, at least two adjacent casings are provided with binding surfaces which are mutually abutted relatively, and the NFC antenna assembly is not located inside the whole mobile terminal on the binding surface of any casing of the NFC antenna assembly, so that the space inside the whole mobile terminal is saved. The technical problem that the mobile terminal occupies the internal space of the mobile terminal due to the arrangement of the NFC antenna in the prior art is solved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Wherein:

fig. 1 is a schematic structural diagram of a housing of an NFC antenna structure according to an embodiment of the present invention.

Fig. 2 is a schematic partial structure diagram of an NFC antenna structure according to an embodiment of the present invention.

Fig. 3 is a schematic diagram of a stacking structure of an NFC antenna structure according to an embodiment of the present invention.

In the figure:

10. a housing; 11. a frame body; 111. a bottom frame; 1111. a sixth bonding surface; 112. a middle frame; 1121. a first binding surface; 12. a display screen; 121. a display area; 122. a fixed zone; 1221. a fourth binding surface; 13. a display screen cover plate; 131. a transparent region; 132. an ink zone; 21. an antenna line; 21a, a first accommodating space; 21b, a second accommodating space; 211. a first feeding point; 212. a second feeding point; 213. a first loop of wiring; 214. A second loop of wiring; 215. a first positioning portion; 216. a second positioning portion; 217. a transition section; 30. a nanocrystalline magnetic shielding sheet; 40. a conductive adhesive; 50. a flexible circuit board.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The utility model provides a mobile terminal, this mobile terminal include NFC antenna structure in order to realize closely wireless communication, and mobile terminal can be cell-phone, ipad or intelligent wrist-watch etc..

As shown in fig. 1-3, the present invention provides an NFC antenna structure, which includes a plurality of sequentially stacked housings 10 and NFC antenna assemblies; wherein at least two adjacent housings 10 have abutting surfaces against each other, and the NFC antenna component is disposed on any of the abutting surfaces.

The utility model discloses in, a plurality of casing 10 piles up in proper order, and two at least adjacent casings 10 have the binding face of butt each other relatively, with on the binding face of arbitrary casing 10 of NFC antenna module, make the NFC antenna module not be located the inside of mobile terminal complete machine, saved the inside space of complete machine. The technical problem that the mobile terminal occupies the internal space of the mobile terminal due to the arrangement of the NFC antenna in the prior art is solved.

In an embodiment, the housing 10 includes a frame 11 and a display 12 covering the frame 11, the display 12 includes a display area 121 and a fixing area 122 surrounding the display area 121, the frame 11 has a first attachment surface 1121 opposite to the fixing area 122, the fixing area 122 has a second attachment surface opposite to the frame 11, and the NFC antenna assembly may be disposed on the first attachment surface 1121 or the second attachment surface.

In one embodiment, the housing 10 further includes a display cover 13 covering the display 12, the display cover 13 includes a transparent area 131 corresponding to the display area 121 and an ink area 132 surrounding the transparent area 131, the ink area 132 has a third facing surface opposite to the display 12, the fixing area 122 has a fourth facing surface 1221 opposite to the ink area 132, and the NFC antenna assembly may be disposed on the third facing surface or the fourth facing surface 1221.

In one embodiment, the frame 11 includes a bottom frame 111 and a middle frame 112 sandwiched between the bottom frame 111 and the display screen 12, the bottom frame 111 has a fifth attaching surface opposite to the middle frame 112, and the middle frame 112 has a sixth attaching surface 1111 opposite to the bottom frame 111; one end of the middle frame 112 away from the bottom frame 111 has a first abutting surface 1121. The NFC antenna assembly can be disposed on the fifth mating surface or the sixth mating surface 1111.

It should be noted that the housing 10 of the mobile terminal includes, but is not limited to, this.

Wherein, the NFC antenna component includes an antenna line 21, and in some specific embodiments, the antenna line 21 is a coil structure, and the number of turns of the antenna line 21 is at least two, so as to increase the area of the antenna line 21 and improve the performance of the NFC antenna structure.

In some specific embodiments, the antenna line 21 is at least 0.2mm away from the outer edge of the attaching surface, and the antenna line 21 is at least 0.2mm away from the inner edge of the attaching surface.

In some specific embodiments, the antenna line 21 is formed by an LDS laser etching plating process, and the thickness of the antenna line 21 formed by the LDS laser etching plating process is less than 0.06mm, so as to realize the lightness and thinness of the NFC antenna structure; the antenna line 21 is a metallized line, and the impedance of the metallized line is less than 1 ohm, and the lower the impedance of the antenna line 21 is, the better the performance is. This technical scheme has not only reduced NFC antenna structure's thickness promptly, has still improved NFC antenna structure's performance.

Furthermore, the width range of the antenna circuit 21 formed by the LDS laser etching plating process is less than 0.2mm, and the interval range of two adjacent circles of antenna circuits 21 is 0.15mm-0.2mm, so that the performance of the NFC antenna structure is further improved.

The LDS is called laser direct structuring in english, the chinese name is laser direct structuring technology, and is a 3D-MID (Three-dimensional mechanically structured device) production technology for professional laser processing, injection and electroplating processes. Specifically, paint which can be used for LDS is sprayed on the attaching surface, the paint is activated by using an LDS process to form an activation area, the activation area is a chemical plating area of the antenna circuit 21, and finally chemical plating treatment is performed to obtain the antenna circuit 21.

In some specific embodiments, the NFC antenna assembly further includes a nanocrystalline magnetic shielding sheet 30 for covering the antenna line 21, and the nanocrystalline magnetic shielding sheet 30 is provided with an avoiding opening avoiding a feeding point of the antenna line 21. The nanocrystalline magnetic shielding sheet 30 externally bunches up and reflects the antenna signal, and the thickness of the NFC antenna structure can be further reduced by the nanocrystalline magnetic shielding sheet 30.

In some embodiments, paint containing ferrite components may also be used to cover the antenna lines 21 in place of the nanocrystalline magnetic shield 30 to reflect the antenna signals.

The NFC antenna assembly further includes a conductive paste 40 and a flexible circuit board 50, the conductive paste 40 is located between the feeding point of the antenna line 21 and the flexible circuit board 50 to achieve conductivity, and the flexible circuit board 50 is used for being connected with a circuit board of the mobile terminal, thereby achieving an antenna function. The conductive adhesive 40 may be an anisotropic conductive adhesive 40 or a polymer conductive adhesive 40.

In some embodiments, the antenna line 21 may be formed by a silver paste printing process or an etching process. It should be noted that the manufacturing process of the antenna circuit 21 in the present invention includes, but is not limited to, this.

Referring to fig. 2, taking the NFC antenna assembly disposed on the third bonding surface of the ink area 132 as an example for explanation, fig. 3 is a schematic structural diagram of the NFC antenna assembly disposed on the third bonding surface, specifically, the circuit includes a first feeding point 211, a second feeding point 212, a first loop of wiring 213, a second loop of wiring 214, and a transition portion 217, a starting end of the first loop of wiring 213 is provided with the first feeding point 211, a tail end of the second loop of wiring 214 is provided with the second feeding point 212, the transition portion 217 is connected between a tail end of the first loop of wiring 213 and a starting end of the second loop of wiring 214, and the first feeding point 211 and the second feeding portion are disposed on two sides of the transition portion 217.

It should be noted that the antenna circuit 21 includes, but is not limited to, the first loop of trace 213 and the second loop of trace 214, that is, the antenna circuit 21 includes two or more loops of trace; meanwhile, a transition portion 217 is disposed between any two adjacent loops of wires, and the first feeding point 211 and the second feeding point 212 are disposed at the starting end of the first loop of wires 213 and the end of the last loop of wires, respectively.

First feed point 211, second feed point 212 and transition portion 217 then can set up according to the actual space condition in the concrete position of binding face, the utility model discloses do not prescribe a limit to this.

Preferably, the transition portion 217 is vertically connected to the starting end of the second loop of wire 214 to form a first accommodating space 21a, and the transition portion 217 is vertically connected to the end of the first loop of wire 213 to form a second accommodating space 21 b; the first feeding point 211 is located in the first receiving space 21a, so that the area of the first feeding point 211 can be increased, and the fitting degree of the first feeding point 211 and the flexible circuit board 50 can be improved; the second feeding point 212 is located in the second receiving space 21 b. Therefore, the area of the second feeding point 212 can be increased, and the attaching degree of the second feeding point 212 and the flexible circuit board 50 can be improved.

The antenna line 21 further includes a first positioning portion 215 located in the first limit space and connected to the first feeding portion, and a second positioning portion 216 located in the second limit space and connected to the second feeding portion. The first positioning portion 215 is connected to the first feeding point 211, the second positioning portion 216 is connected to the second feeding point 212, and the flexible printed circuit board can be aligned and attached to the first feeding point 211 and the second feeding point 212 quickly by the cooperation of the first positioning portion 215 and the second positioning portion 216.

Preferably, the first positioning portion 215 may have a cross shape or a T shape, and the second positioning portion 216 has a cross shape or a T shape, so as to improve the positioning accuracy of the first positioning portion 215 and the positioning portion. The shapes of the first positioning portions 215 and the second positioning portions 216 include, but are not limited to, this.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above examples are merely illustrative of several embodiments of the present invention, which are described in more detail and detail, but are not to be construed as limiting the scope of the claims. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. An NFC antenna structure for a mobile terminal, comprising: the NFC antenna assembly comprises a plurality of shells and NFC antenna assemblies which are stacked in sequence, wherein at least two adjacent shells are provided with abutting surfaces which abut against each other relatively, and the NFC antenna assemblies are arranged on any one of the abutting surfaces.

2. The NFC antenna structure of claim 1, wherein the housing includes a frame and a display screen disposed on the frame and including a display area and a fixed area surrounding the display area, the frame having a first abutting surface opposite the fixed area, the fixed area having a second abutting surface opposite the frame, the NFC antenna assembly disposed on the first abutting surface or the second abutting surface.

3. The NFC antenna structure of claim 2, wherein the housing further includes a display cover disposed over the display, the display cover including a transparent region corresponding to the display region and an ink region surrounding the transparent region, the ink region having a third mating surface opposite the display, the fixed region having a fourth mating surface opposite the ink region, the NFC antenna assembly disposed on the third mating surface or the fourth mating surface.

4. The NFC antenna structure of claim 3, wherein the frame body comprises a bottom frame and a middle frame sandwiched between the bottom frame and the display screen, the bottom frame has a fifth abutting surface opposite to the middle frame, and the middle frame has a sixth abutting surface opposite to the bottom frame; one end of the bottom frame far away from the middle frame forms the first binding face, and the NFC antenna assembly is arranged on the fifth binding face or the sixth binding face.

5. NFC antenna structure according to one of claims 1 to 4, characterized in that the NFC antenna assembly comprises an antenna line in a coil structure, and the number of turns of the antenna line is at least two turns.

6. The NFC antenna structure according to claim 5, wherein the antenna line includes a first feeding point, a second feeding point, a first loop of wire, a second loop of wire, and a transition portion, a starting end of the first loop of wire is provided with the first feeding point, a tail end of the second loop of wire is provided with the second feeding point, the transition portion is connected between the tail end of the first loop of wire and the starting end of the second loop of wire, and the first feeding point and the second feeding point are respectively disposed at two sides of the transition portion.

7. The NFC antenna structure of claim 6, wherein the transition portion is vertically connected to a starting end of the second loop of wire to form a first accommodating space, the transition portion is vertically connected to a tail end of the first loop of wire to form a second accommodating space, the first feeding point is located in the first accommodating space, and the second feeding point is located in the second accommodating space.

8. The NFC antenna structure of claim 7, wherein the antenna circuit further includes a first positioning portion located in the first receiving space and connected to the first feeding point, and a second positioning portion located in the second receiving space and connected to the second feeding point.

9. The NFC antenna structure of claim 8, wherein the first positioning portion and the second positioning portion are in a cross or T configuration.

10. A mobile terminal, characterized in that the mobile terminal comprises an NFC antenna structure according to any of claims 1-9.