WO2015180254A1 - 一种近场通信天线装置 - Google Patents

一种近场通信天线装置 Download PDF

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Publication number
WO2015180254A1
WO2015180254A1 PCT/CN2014/083063 CN2014083063W WO2015180254A1 WO 2015180254 A1 WO2015180254 A1 WO 2015180254A1 CN 2014083063 W CN2014083063 W CN 2014083063W WO 2015180254 A1 WO2015180254 A1 WO 2015180254A1
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Prior art keywords
nfc antenna
mirror ring
ring
wall
antenna device
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PCT/CN2014/083063
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English (en)
French (fr)
Inventor
王凯
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中兴通讯股份有限公司
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Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Priority to US15/311,906 priority Critical patent/US20170093018A1/en
Priority to EP14893099.3A priority patent/EP3136502B1/en
Publication of WO2015180254A1 publication Critical patent/WO2015180254A1/zh

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    • H04B5/70—
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/2291—Supports; Mounting means by structural association with other equipment or articles used in bluetooth or WI-FI devices of Wireless Local Area Networks [WLAN]
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
    • H04B5/26—

Definitions

  • the utility model relates to the field of mobile terminals, in particular to a near field communication (NFC) antenna device.
  • NFC near field communication
  • an NFC-enabled terminal attaches a planar coil antenna to the rear back casing or the battery board as an NFC antenna.
  • Near field communication is achieved by electromagnetic coupling between the NFC antenna coil and the card swipe machine.
  • the arrangement of the general NFC antenna coil is parallel to the terminal circuit board, and the distance is very close. If the metal circuit board is too close to the NFC antenna, the electromagnetic coupling energy is seriously weakened, and the communication between the NFC antenna and the card swiping device is affected. Performance, which affects the card swipe effect.
  • the NFC antenna occupies a large area, generally 3 cm * 3 cm, and is attached to the back of the terminal or the panel in the form of a flexible printed circuit board (FPC), and the level cannot be adjusted.
  • FPC flexible printed circuit board
  • the special nature of the NFC antenna necessitated consideration of mutual interference and electromagnetic compatibility issues with other components on the board at the beginning of the design. As far as the current NFC antenna arrangement method is concerned, there is substantially no major change in the influence of electromagnetic coupling.
  • the present invention mainly provides an NFC antenna device.
  • the utility model provides an NFC antenna device, which comprises: a camera lens ring and an NFC antenna; wherein the NFC antenna is arranged on an outer edge of a top surface of the camera lens ring; a wire is arranged on a side wall of the camera lens ring The wire connects the NFC antenna to the terminal circuit board.
  • the utility model provides an NFC antenna device, which can utilize the telescopic expansion of the camera lens ring to change the distance between the NFC antenna and the circuit board, thereby changing the efficiency and the resonance frequency of the NFC antenna, and improving the card swipe performance.
  • FIG. 1 is a structural diagram of an NFC antenna device according to an embodiment of the present invention.
  • FIG. 2 is a schematic diagram of a rotating connection structure of a camera lens ring according to the first embodiment of the present invention
  • FIG. 3 is a schematic view showing the connection and rotation movement of the outer mirror ring and the inner mirror ring according to an embodiment of the present invention
  • FIG. 4 is a side view of the camera lens ring and the terminal circuit board connected to each other according to an embodiment of the present invention
  • FIG. 5 is a schematic diagram of a nested connection structure of a camera lens ring of the second embodiment according to an embodiment of the present invention.
  • An embodiment of the present invention provides an NFC antenna device, including: a camera lens ring and an NFC antenna, wherein the NFC antenna is disposed on an outer edge of a top surface of the camera lens ring; and a wire is disposed on a sidewall of the camera lens ring, the wire Connect the NFC antenna to the terminal board.
  • the initiating device and the target device of the NFC communication are coupled to each other by an alternating magnetic field. Since the terminal board has an electromagnetic influence on the NFC antenna coil, if the two distances are too close, the circuit board will weaken the electromagnetic coupling energy between the NFC antenna coil and the card swiping device (or other NFC device) when the NFC antenna is operated. Affecting the communication performance of the NFC, the solution proposed by the present invention can adjust the distance between the NFC antenna and the circuit board to improve the NFC communication performance.
  • FIG. 1 The structure of the NFC antenna device implemented in the embodiment of the present invention is as shown in FIG. 1 , which includes: a camera lens ring 10 and an NFC antenna 11; 12 is a terminal circuit board; and the NFC antenna 11 is disposed on the outer edge of the top surface of the camera lens ring.
  • the figure is indicated by a thick line, and a wire 13 (shown by a broken line) is disposed on the side wall of the camera lens ring, and the NFC antenna 11 and the terminal circuit board 12 are connected by the wire 13; wherein the wire 13 in FIG. 1 is only used as a schematic
  • the NFC antenna 11 is connected to the terminal circuit board 12 and is not intended to define the layout and routing of the wires 13.
  • FIG. 2 is a schematic view showing the rotation connection structure of the camera lens ring of the first scheme; as shown in the figure, the camera lens ring is divided into an outer mirror ring 20 and an inner mirror ring 21, and an outer mirror ring 20 is set on the inner mirror ring 21, and It is slightly higher than the inner mirror ring 21, and the height is determined by the imaging requirement of the terminal; the NFC antenna 11 is on the outer edge of the top surface of the outer mirror ring 20, so the outer edge of the outer mirror ring is selected to go.
  • the NFC antenna 11 is because the antenna size and the area of the coil can be as large as possible, and the size of the NFC antenna is required; 22 is two vertical wires provided on the outer wall of the outer mirror ring, and the two wires 22 For the two feeder ends of the NFC antenna 11, 23 is a two-stage threaded wire on the inner wall of the outer mirror ring, which is an extension of the wire 22, respectively, and the wire 22 is drilled from the outer wall of the outer mirror ring to the inner wall of the outer mirror ring and Two segments of threaded wire 23 are connected; 24 is a two-threaded wire on the outer wall of the inner mirror ring (shown in phantom in Figure 2), the threaded wire 23 on the inner wall of the outer mirror ring and the threaded wire 24 on the outer wall of the inner mirror ring Connected to each other by a rotary motion;
  • the method is more stable and reliable than the traditional NFC contact method
  • the NFC signal is routed from the NFC antenna 11 to the conductor 22 to the threaded conductor 23, through the rotation of the outer mirror ring and the inner mirror ring, to the threaded conductor 24, and finally to the NFC signal point on the terminal circuit board 12.
  • Figure 3 is a schematic view showing the connection and rotation of the outer mirror ring and the inner mirror; the left side of the box 30 indicates the thread ring on the mirror ring, which is only a part of the thread ring; wherein the dotted line indicates the threaded wire;
  • the picture shows the top view of the camera lens ring, 20 and 21 respectively represent the outer mirror ring and the inner mirror ring; 23 is the threaded wire on the inner wall of the outer mirror ring, 24 is the threaded wire on the outer wall of the inner mirror ring; And the length of the threaded wire on the inner mirror ring is determined by the radius of the mirror ring and the amount of expansion and contraction allowed by the mirror ring, which is not limited by the present invention;
  • the outer mirror ring 20 is set on the inner mirror ring 21, and the outer mirror ring 20 can be rotated clockwise or counterclockwise, and the outer mirror ring 20 can be rotated and adjusted by rotation, and has a certain rotation stroke, as long as the rotation arc does not exceed the threaded wire 23 Or the arc length of 24 may be, if it is exceeded, the threaded wire 23 on the outer mirror ring 20 and the threaded wire 24 on the inner mirror ring 21 will lose electrical connection.
  • FIG. 4 is a side view of the connection between the camera lens ring and the terminal circuit board; in the figure, 20 is an outer mirror ring, 21 is an inner mirror ring, a thick line on the top surface of the outer mirror ring 20 is an NFC antenna 11, and a terminal circuit board is 12, L represents the vertical distance between the NFC antenna 11 and the terminal circuit board 12; according to the usual threading direction, the outer mirror ring 20 is rotated counterclockwise, and the outer mirror ring 20 is extended outward, that is, the NFC antenna 11 is away from the terminal circuit board 12, and vice versa.
  • the outer mirror ring 20 is rotated clockwise, and the outer mirror ring 20 is retracted, that is, the NFC antenna 11 is close to the terminal circuit board 12; the outer mirror ring 20 is telescoped by rotating the outer mirror ring 20 to realize the between the NFC antenna 11 and the terminal circuit board 12.
  • the distance change which changes the efficiency and resonance frequency of the NFC antenna 11, thereby reducing the electromagnetic influence of the board on the NFC antenna and improving the communication performance of the NFC.
  • FIG. 5 is a schematic diagram of a nested connection structure of a camera lens ring of the second embodiment provided by the present invention, and is another extension of the rotary connection of the first embodiment shown in FIG. 2;
  • 20 is an outer mirror ring
  • 21 is an inner mirror ring
  • 20 outer lens rings are arranged on the inner mirror ring 21, And slightly higher than the inner mirror ring 21
  • the NFC antenna 11 is on the outer edge of the top surface of the outer mirror ring 20
  • the inner wall of the outer mirror ring is provided with two "convex" vertical wires 50, the two wires 50 It is the two feeder ends of the NFC antenna 11
  • the outer wall of the inner mirror ring is provided with two "concave” vertical wires 51 which are crimped to the NFC signal points on the terminal circuit board 12 through the connector.
  • the "convex" wire 50 is wedged into the "concave” wire 51 to achieve a nested connection that is similar to the engagement between the train track and the wheel; when the outer mirror ring 20 and the inner mirror ring 21 use this nesting When the connection mode is adopted, the outer mirror ring 20 cannot perform the rotary motion, and the outer mirror ring 20 can only move up and down;
  • the apparatus further includes a small motor 52, a rotating shaft or a traction head 53, the pulley 54 connects the motor 52 and the rotating shaft (or the traction head) 53, and the small motor 52 rotates through the pulley 54 to drive the shaft (or The traction head) 53, which in turn drives the outer mirror ring 20 to move up and down, and when the outer mirror ring 20 moves, the distance between the NFC antenna 11 and the terminal circuit board 12 is changed; the upward distance does not exceed the "convex" wire or The length of the "concave” wire that would otherwise cause the connection to break.
  • the NFC antenna is arranged on the outer edge of the top surface of the outer mirror ring, and the outer mirror ring is telescoped or directly moved up and down by the rotation, and the inner mirror ring is fixed; however, most of the cameras are telescopic, the outer mirror The ring is fixed. If so, the NFC antenna is placed on the outer edge of the top surface of the inner mirror ring to achieve the effect of adjusting the distance between the NFC antenna and the terminal circuit board.
  • the NFC antenna device of the present invention includes: a camera lens ring and an NFC antenna; wherein the NFC antenna is disposed on an outer edge of a top surface of the camera lens ring; and a wire is disposed on a sidewall of the camera lens ring, and the wire
  • the NFC antenna is connected to the terminal circuit board; the NFC antenna is placed on the large camera lens ring.
  • This large camera and NFC antenna are suitable for mobile phones, tablet computers and other end products; the NFC is adjusted by adjusting the distance between the inner and outer mirror rings. The distance between the antenna and the terminal board is optimized for the performance of the NFC antenna.
  • the NFC antenna device of the present invention can utilize the telescopic expansion of the camera lens ring to change the distance between the NFC antenna and the circuit board, thereby changing the efficiency and resonance frequency of the NFC antenna, and improving the card swipe performance.

Abstract

本实用新型提供了一种近场通信(NFC)天线装置，包括：摄像头镜圈和NFC天线；其中，所述NFC天线设置在所述摄像头镜圈顶面外沿上，摄像头镜圈侧壁上设置导线，所述导线将NFC天线与终端电路板连接起来。

Description

一种近场通信天线装置 技术领域
本实用新型涉及移动终端领域，尤其涉及一种近场通信(NFC，Near Field Communication)天线装置。
背景技术
目前很多手机或其它类型的移动终端都支持NFC功能，一般情况下，支持NFC功能的终端会在终端背面壳体上或电池板上贴一个平面线圈天线作为NFC天线。NFC天线线圈与刷卡机之间通过电磁耦合来实现近场通信。一般的NFC天线线圈的布置与终端电路板平行，且距离很近，金属材质的电路板如果与NFC天线靠的太近，会严重削弱电磁耦合的能量，影响NFC天线与刷卡设备之间的通信性能，从而影响刷卡效果。
而且，NFC天线占用的面积较大，一般为3cm*3cm，以一种固化的软性线路板(FPC，Flexible Printed Circuit)形式粘贴在终端背部或电池板上，无法调整其水平高度。NFC天线的特殊性使得我们在设计之初就不得不考虑它和电路板上其它部件的相互干扰和电磁兼容问题。就目前的NFC天线的布置方法而言，对电磁耦合的影响基本没有大的改变。
实用新型内容
为了解决上述问题，本实用新型主要提供一种NFC天线装置。
本实用新型的技术方案是这样实现的：
本实用新型提供了一种NFC天线装置，该装置包括：摄像头镜圈和NFC天线；其中，所述NFC天线设置在所述摄像头镜圈顶面外沿上；摄像头镜圈侧壁上设置有导线，所述导线将NFC天线与终端电路板连接起来。
本实用新型提供的一种NFC天线装置，该装置可以利用摄像头镜圈的伸缩，使NFC天线和电路板之间的距离变化，进而改变NFC天线的效率和谐振频率，改善刷卡性能。
附图说明
图1为本实用新型实施例提供的NFC天线装置的结构图；
图2为本实用新型实施例提供的方案一的摄像头镜圈的旋转连接结构示意图；
图3为本实用新型实施例提供的外镜圈和内镜圈连接和旋转运动示意图；
图4为本实用新型实施例提供的摄像头镜圈和终端电路板相互连接的侧视图；
图5为本实用新型实施例提供的方案二的摄像头镜圈的嵌套连接结构示意图。
附图标记说明：10，摄像头镜圈；11，NFC天线；12，终端电路板；13，导线；20，外镜圈；21，内镜圈；22，外镜圈外壁上的竖直导线；23，外镜圈内壁上的螺纹导线；24，内镜圈外壁上的螺纹导线；25，内镜圈外壁上的竖直导线；26，终端电路板上的NFC信号点；30，螺纹圈；50，外镜圈内壁上的“凸”状导线；51，内镜圈外壁上的“凹”状导线；52，小型马达；53，转轴或牵引头；54，皮带轮。
具体实施方式
本实用新型实施例提供一种NFC天线装置，包括：摄像头镜圈和NFC天线，所述NFC天线设置在所述摄像头镜圈顶面外沿上；摄像头镜圈侧壁上设置导线，所述导线将NFC天线与终端电路板连接起来。
NFC通信的发起设备和目标设备之间是以交流磁场方式相互耦合的， 由于终端电路板对NFC天线线圈会有电磁影响，如果两个距离过近，在NFC天线工作时，电路板就会削弱NFC天线线圈与刷卡设备(或其它NFC设备)之间的电磁耦合能量，影响NFC的通信性能，所以本实用新型提出的方案可以调节NFC天线与电路板之间的距离，改善NFC通信性能。
下面通过附图及具体实施例对本实用新型做进一步的详细说明。
本实用新型实施例实现的NFC天线装置结构总体如图1所示，包括：摄像头镜圈10和NFC天线11；图中12为终端电路板；NFC天线11设置在摄像头镜圈顶面外沿上，图中用粗线条表示，摄像头镜圈侧壁上设置导线13(用虚线表示)，通过导线13将NFC天线11和终端电路板12连接起来；其中，图1中的导线13只是用作示意将NFC天线11与终端电路板12相连，并不用于限定导线13的布局和走线方式。
图2所示为方案一的摄像头镜圈的旋转连接结构示意图；如图所示，摄像头镜圈分为外镜圈20和内镜圈21，外镜圈20套在内镜圈21上，并且比内镜圈21要稍高一些，高出的程度由终端的摄像需求来决定；NFC天线11走在外镜圈20顶面的外沿上，之所以选择外镜圈的顶面外沿来走NFC天线11，是因为可以将天线尺寸和线圈的面积尽可能的大，满足NFC天线相对于尺寸的要求；22为外镜圈的外壁上设置的两根竖直的导线，这两根导线22为NFC天线11的两个馈线端，23为外镜圈的内壁上的两段螺纹导线，分别是导线22的延伸，导线22通过钻孔从外镜圈的外壁转到外镜圈的内壁与两段螺纹导线23相连；24为内镜圈的外壁上的两段螺纹导线(图2中用虚线表示)，外镜圈的内壁上的螺纹导线23和内镜圈的外壁上的螺纹导线24通过旋转运动相互衔接；
25为内镜圈的外壁上设置的两根竖直的导线，为螺纹导线24的延伸，导线25通过连接器与终端电路板12上的NFC信号点26压接在一起；这种压接的方式比传统的NFC接触方式更稳定、可靠；
图2中NFC信号从NFC天线11到导线22，到螺纹导线23，通过外镜圈和内镜圈的旋转衔接，再到螺纹导线24，最后由导线25至终端电路板12上NFC信号点。
图3所示为外镜圈和内镜圈旋连接和旋转运动的示意图；左边方框中30中表示镜圈上的螺纹圈，图中只是螺纹圈的一部分；其中，虚线表示螺纹导线；右图为摄像头镜圈的顶视图，20和21分别表示外镜圈和内镜圈；23为外镜圈的内壁上的螺纹导线，24为内镜圈的外壁上的螺纹导线；其中外镜圈和内镜圈上的螺纹导线的长度由镜圈的半径和镜圈允许的伸缩量决定，本实用新型对此不做限定；
外镜圈20套在内镜圈21上，外镜圈20可以顺时针或逆时针旋转，通过旋转调节外镜圈20伸缩量，且有一定的旋转行程，只要保证旋转弧度不超过螺纹导线23或24的弧长即可，如果超过了，则外镜圈20上的螺纹导线23和内镜圈21上的螺纹导线24就会失去电连接。
图4为摄像头镜圈和终端电路板连接的侧视图；图中20为外镜圈，21为内镜圈，外镜圈20顶面上的粗线为NFC天线11，终端电路板为12，L表示NFC天线11与终端电路板12之间的垂直距离；按照平常的螺纹走向，将外镜圈20逆时针旋转，外镜圈20往外伸，即NFC天线11远离终端电路板12，反之，将外镜圈20顺时针旋转，外镜圈20缩回，即NFC天线11靠近终端电路板12；通过旋转外镜圈20使外镜圈20伸缩，实现NFC天线11与终端电路板12之间的距离变化，这种距离变化会改变NFC天线11的效率和谐振频率，从而减小电路板对NFC天线的电磁影响，改善NFC的通信性能。
图5为本实用新型提供的方案二的摄像头镜圈的嵌套连接结构示意图，是图2所示方案一的旋转连接的另一种引申；
如图5所示，20为外镜圈，21为内镜圈，外镜圈20套在内镜圈21上， 且比内镜圈21稍高些；NFC天线11走在外镜圈20顶面的外沿上；外镜圈的内壁上设置有两根“凸”状竖直的导线50，这两根导线50是NFC天线11的两个馈线端；内镜圈的外壁上设置有两根“凹”状竖直的导线51，所述导线51通过连接器与终端电路板12上的NFC信号点压接在一起；
“凸”状导线50楔入“凹”状导线51中实现嵌套连接，这种连接方式类似于火车轨道与车轮之间的接合；当外镜圈20与内镜圈21使用这种嵌套连接方式时，外镜圈20不能做旋转运动，外镜圈20只可以上下运动；
如图5所示，该装置还包括一个小型马达52，一个转轴或牵引头53，皮带轮54将马达52和转轴(或牵引头)53连接起来，小型马达52转动时通过皮带轮54带动转轴(或牵引头)53，进而带动外镜圈20上下移动，外镜圈20移动时，也就改变了NFC天线11和终端电路板12之间的距离；上移的距离不超过“凸”状导线或“凹”状导线的长度，否则会导致连接断开。
上述实施例均将NFC天线布置在外镜圈的顶面外沿上，外镜圈通过旋转实现伸缩或直接上下移动，内镜圈固定不动；然而，目前多数摄像头是内镜圈伸缩，外镜圈固定不动，若如此，将NFC天线布置在内镜圈的顶面外沿上，也可达到调节NFC天线与终端电路板间距离的效果。
本实用新型提出的NFC天线装置，包括：摄像头镜圈和NFC天线；其中，所述NFC天线设置在所述摄像头镜圈顶面外沿上；摄像头镜圈侧壁上设置导线，所述导线将NFC天线与终端电路板连接起来；将NFC天线设置在大摄像头镜圈上，这种大摄像头和NFC天线适用于手机、平板电脑等终端产品；通过调节内、外镜圈之间距离来调节NFC天线和终端电路板之间的距离，达到优化NFC天线性能的目的。
以上所述，仅为本实用新型的较佳实施例而已，并非用于限定本实用新型的保护范围，凡在本实用新型的精神和原则之内所作的任何修改、等 同替换和改进等，均应包含在本实用新型的保护范围之内。
工业实用性
综上所述，本实用新型的NFC天线装置可以利用摄像头镜圈的伸缩，使NFC天线和电路板之间的距离变化，进而改变NFC天线的效率和谐振频率，改善刷卡性能。

Claims (9)

  1. 一种近场通信NFC天线装置，该装置包括：摄像头镜圈和NFC天线；其中，所述NFC天线设置在所述摄像头镜圈顶面外沿上；摄像头镜圈侧壁上设置有导线，所述导线将NFC天线与终端电路板连接起来。
  2. 根据权利要求1所述的NFC天线装置，其中，所述摄像头镜圈包括：内镜圈和外镜圈；内镜圈通过结构件直接与终端电路板连接，内镜圈固定不可移动；外镜圈套在内镜圈上，比内镜圈高，且外镜圈顶面外沿上设置NFC天线。
  3. 根据权利要求2所述的NFC天线装置，其中，所述外镜圈和内镜圈上分别设置有螺纹，所述外镜圈和内镜圈通过所述螺纹连接，外镜圈沿着螺纹旋转，调节伸缩量。
  4. 根据权利要求2所述的NFC天线装置，其中，外镜圈的外壁上设置有竖直的两根导线，作为NFC天线线圈的两个馈线端；外镜圈的内壁上设置有两段螺纹导线；所述外镜圈的外壁上的两个馈线端通过钻孔至外镜圈的内壁与所述两段螺纹导线相连。
  5. 根据权利要求3所述的NFC天线装置，其中，内镜圈的外壁上设置有两段螺纹导线，与外镜圈的内壁上的两段螺纹导线通过螺纹旋转相互连接；所述内镜圈的外壁上的两段螺纹导线设置有两段延长导线，通过连接器与终端电路板上的NFC天线信号点压接在一起。
  6. 根据权利要求2所述的NFC天线装置，其中，外镜圈的内壁上设置有两根竖直的“凸”状导线，作为NFC天线线圈的两个馈线端。
  7. 根据权利要求2所述的NFC天线装置，其中，内镜圈的外壁上设置有两根竖直的“凹”状导线，通过连接器与终端电路板上的NFC天线信号点压接在一起。
  8. 根据权利要求7所述的NFC天线装置，其中，所述外镜圈的内壁 上的“凸”状导线与内镜圈的外壁上的“凹”状导线嵌套连接。
  9. 根据权利要求8所述的NFC天线装置，其中，所述装置还包括：小型马达、转轴或牵引头和皮带轮；其中，小型马达通过皮带轮带动转轴或牵引头，转轴或牵引头带动外镜圈上下运动。
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