CN215732191U

CN215732191U - NFC antenna structure with single-sided wiring

Info

Publication number: CN215732191U
Application number: CN202121727948.9U
Authority: CN
Inventors: 李忍
Original assignee: Dongguan Hailian Technology Co ltd
Current assignee: Dongguan Haifeng Electronic Technology Co ltd
Priority date: 2021-07-27
Filing date: 2021-07-27
Publication date: 2022-02-01
Anticipated expiration: 2031-07-27

Abstract

The utility model discloses a single-side wiring NFC antenna structure which comprises a substrate, an antenna body and a connecting part, wherein a concave part is formed in the surface of the substrate, a heat dissipation layer is bonded on the top of the substrate, a concave matched with the concave part is formed in the surface of the heat dissipation layer, the antenna body is formed in a mode of winding in sequence, and the antenna body is bonded on the top of the heat dissipation layer. Through the setting of depressed part and connecting portion, all weld the initiating terminal and the end of antenna body on the conducting strip surface, set up two sets of conducting strips again in the connecting portion surface, set up connecting portion inside the depressed part at last, come to hold the initiating terminal and end, conducting strip and the conductive contact of antenna body through the setting of depressed part, can reduce effectively and reduce holistic thickness, accord with the frivolous demand of modern cell-phone.

Description

NFC antenna structure with single-sided wiring

Technical Field

The utility model relates to the technical field of wireless communication, in particular to an NFC antenna structure with single-sided wiring.

Background

NFC generally refers to near field communication, which is a new technology, and devices using NFC antennas can exchange data when they are close to each other, and NFC antennas are based on RFID radio frequency identification technology, and use transformer co-coupling matching as a hardware processing scheme for communication, and complete verification of data transfer process through communication instructions of a processor, and software and hardware environments are successfully designed and manufactured through RFID modulation processing and matching circuit adjustment, and generally consist of a circuit coil manufactured by a winding/printing/etching process and a ferrite material with anti-interference capability;

the NFC antenna in the prior art can realize a closed loop only by using a double-sided circuit board, the antenna is protruded on the surface of a substrate, and a feed end is protruded on the surface of the antenna, so that the whole thickness cannot be reduced, and the requirement of mobile phone production cannot be further met.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a single-side routing NFC antenna structure, which is characterized in that a concave part is arranged on the surface of a substrate, and the starting end and the tail end of an antenna body, a conducting strip and a conducting contact are arranged in the concave part, so that the problems in the background technology are solved.

In order to achieve the purpose, the utility model provides the following technical scheme: an NFC antenna structure with single-sided wiring comprises a substrate, an antenna body and a connecting part, wherein a concave part is formed in the surface of the substrate, a heat dissipation layer is bonded on the top of the substrate, a concave matched with the concave part is formed in the surface of the heat dissipation layer, the antenna body is formed in a mode of winding in sequence, and the antenna body is bonded on the top of the heat dissipation layer;

the antenna comprises a connecting part, two groups of conducting strips, an antenna body and a conducting contact, wherein the connecting part is arranged inside the depressed part, the bottom of the connecting part is bonded with the two groups of conducting strips, the starting end and the tail end of the antenna body are bent towards the depressed part and are respectively welded on the surfaces of the two groups of conducting strips, the surfaces of the two groups of conducting strips are bonded with the conducting contact, and the starting end and the tail end of the conducting strip, the conducting contact and the antenna body are all arranged inside the depressed part.

Preferably, an adhesive layer is bonded to the bottom of the substrate, and the adhesive layer is in an annular structure matched with the shape of the substrate.

Preferably, the surface of the substrate is integrally formed with a mounting foot, and the surface of the mounting foot is provided with a positioning hole.

Preferably, the depth of the concave part is set to be 8 mm-10 mm, and the distance from the bottom of the conductive contact to the bottom of the substrate is 0.3 mm-0.5 mm.

Preferably, the substrate is made of a PET flexible material, the heat dissipation layer is made of an aluminum material, and the distances from the outer edge of the heat dissipation layer to the outer edge of the antenna body and the distances from the inner edge of the heat dissipation layer to the inner edge of the antenna body are both 2.0-2.5 mm.

Preferably, the bottom of the substrate is bonded with a ferrite magnetic conductive sheet, the ferrite magnetic conductive sheet is arranged at the central part of the bottom of the substrate, and the shortest distance from each part of the ferrite magnetic conductive sheet to the inner edge of the adhesive layer is equal.

Compared with the prior art, the utility model has the beneficial effects that:

through the setting of depressed part and connecting portion, all weld the initiating terminal and the end of antenna body on the conducting strip surface, set up two sets of conducting strips again in the connecting portion surface, set up connecting portion inside the depressed part at last, come to hold the initiating terminal and end, conducting strip and the conductive contact of antenna body through the setting of depressed part, can reduce effectively and reduce holistic thickness, accord with the frivolous demand of modern cell-phone.

Drawings

FIG. 1 is a schematic top view of the present invention;

FIG. 2 is a schematic bottom view of the present invention;

FIG. 3 is an enlarged view of region A of FIG. 2 according to the present invention;

fig. 4 is a schematic side view of the present invention.

In the figure: 1. a substrate; 2. an antenna body; 3. a recessed portion; 4. a heat dissipation layer; 5. mounting a foot; 6. positioning holes; 7. a ferrite magnetic conductive sheet; 8. an adhesive layer; 9. a connecting portion; 10. a conductive sheet; 11. and a conductive contact.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 4, the present invention provides a technical solution: a single-side routing NFC antenna structure comprises a substrate 1, an antenna body 2 and a connecting part 9;

the surface of the substrate 1 is provided with a concave part 3, the top of the substrate 1 is bonded with a heat dissipation layer 4, the surface of the heat dissipation layer 4 is provided with a concave matched with the concave part 3, the antenna body 2 is formed in a mode of winding in sequence, and the antenna body 2 is bonded on the top of the heat dissipation layer 4;

connecting portion 9 sets up in the inside of depressed part 3, the bottom of connecting portion 9 bonds and has two sets of conducting strips 10, the initiating terminal and the end of antenna body 2 weld respectively on the surface of two sets of conducting strips 10, the surface bonding of two sets of conducting strips 10 has conductive contact 11, conducting strip 10, the initiating terminal and the end of conductive contact 11 and antenna body 2 all set up in the inside of depressed part 3, setting up through depressed part 3 is to conducting strip 10, conductive contact 11 and antenna body 2's initiating terminal and end hold, need not to arrange it in proper order so that highly can't reduce, can adapt to the demand of modern cell-phone frivolousization.

The bottom of the substrate 1 is bonded with an adhesive layer 8, the adhesive layer 8 is arranged into an annular structure matched with the substrate 1 in shape, the adhesive layer 8 is convenient for the substrate 1 to be bonded and fixed, the adhesive layer 8 is arranged into a 3M pure glue film, is transparent in color, has super-strong viscosity, has super-strong physical stability and chemical stability, can isolate damp gas and play a role in sealing, and also has the characteristics of chemical resistance, ultraviolet ray direct irradiation resistance, rapid temperature change resistance and the like;

the surface of the substrate 1 is integrally formed with a mounting pin 5, the surface of the mounting pin 5 is provided with a positioning hole 6, and the arrangement of the mounting pin 5 and the positioning hole 6 is convenient for subsequent processing or conveying and is convenient for connecting the substrate 1 and a mobile phone;

the depth of the concave part 3 is set to be 8 mm-10 mm, the distance from the bottom of the conductive contact 11 to the bottom of the substrate 1 is 0.3 mm-0.5 mm, the conductive contact 11 is slightly convex, the antenna body 2 can be conveniently connected with a mobile phone through the conductive contact 11, the conductive contact 11 is accommodated through the concave part 3, and the overall height is effectively reduced;

the substrate 1 is made of a PET (polyethylene terephthalate) flexible material, the heat dissipation layer 4 is made of an aluminum material, the distances from the outer edge of the heat dissipation layer 4 to the outer edge of the antenna body 2 and the distances from the inner edge of the heat dissipation layer 4 to the inner edge of the antenna body 2 are both 2.0-2.5 mm, the PET flexible material has the characteristics of high wiring density, light weight, thin thickness and good bending property, and meanwhile, the aluminum material of the heat dissipation layer 4 has good heat dissipation performance and can quickly dissipate heat of the antenna body 2 so as to prevent the normal performance of the antenna body 2 from being influenced by overhigh temperature;

the bottom of the substrate 1 is bonded with a ferrite magnetic sheet 7, the ferrite magnetic sheet 7 is arranged at the central part of the bottom of the substrate 1, and the shortest distance from each part of the ferrite magnetic sheet 7 to the inner edge of the adhesive layer 8 is equal.

The structure principle is as follows: set up depressed part 3 through the surface at base plate 1, bend towards depressed part 3 inside with the initial end and the end of antenna body 2 simultaneously, and weld conducting strip 10 respectively with the initial end and the end of antenna body 2, bond conductive contact 11 on the surface of conducting strip 10, then bond conducting strip 10 on connecting portion 9 surface, all arrange connecting portion 9, conducting strip 10 and conductive contact 11 inside depressed part 3 at last, thereby make holistic height reduction, and can not disturb the normal use of antenna body 2.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a NFC antenna structure of line is walked to single face, includes base plate (1), antenna body (2) and connecting portion (9), its characterized in that: the antenna comprises a substrate (1), a heat dissipation layer (4), a concave part (3) is formed in the surface of the substrate (1), the top of the substrate (1) is bonded with the heat dissipation layer (4), the surface of the heat dissipation layer (4) is provided with a concave part matched with the concave part (3), an antenna body (2) is formed in a sequential winding mode, and the antenna body (2) is bonded to the top of the heat dissipation layer (4);

connecting portion (9) set up in the inside of depressed part (3), the bottom of connecting portion (9) bonds and has two sets of conducting strip (10), buckle and weld respectively in the surface of two sets of conducting strip (10) towards the direction of depressed part (3) with the end of antenna body (2), and are two sets of the surface bonding of conducting strip (10) has electrically conductive contact (11), the initiating terminal and the end of conducting strip (10), electrically conductive contact (11) and antenna body (2) all set up in the inside of depressed part (3).

2. The NFC antenna structure with single-sided trace according to claim 1, wherein: the bottom of the substrate (1) is bonded with an adhesive layer (8), and the adhesive layer (8) is of an annular structure matched with the substrate (1) in shape.

3. The NFC antenna structure with single-sided trace according to claim 1, wherein: the surface of the base plate (1) is integrally formed with a mounting foot (5), and a positioning hole (6) is formed in the surface of the mounting foot (5).

4. The NFC antenna structure with single-sided trace according to claim 1, wherein: the depth of the concave part (3) is set to be 8-10 mm, and the distance from the bottom of the conductive contact (11) to the bottom of the substrate (1) is 0.3-0.5 mm.

5. The NFC antenna structure with single-sided trace according to claim 1, wherein: the base plate (1) is made of a PET flexible material, the heat dissipation layer (4) is made of an aluminum material, and the distance from the outer edge of the heat dissipation layer (4) to the outer edge of the antenna body (2) and the distance from the inner edge of the heat dissipation layer (4) to the inner edge of the antenna body (2) are both 2.0-2.5 mm.

6. The NFC antenna structure with single-sided trace according to claim 1, wherein: the bottom of the base plate (1) is bonded with a ferrite magnetic sheet (7), the ferrite magnetic sheet (7) is arranged at the central part of the bottom of the base plate (1), and the shortest distance from each part of the ferrite magnetic sheet (7) to the inner edge of the adhesive layer (8) is equal everywhere.