WO2012113203A1 - 一种旋转usb接口类设备 - Google Patents

一种旋转usb接口类设备 Download PDF

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Publication number
WO2012113203A1
WO2012113203A1 PCT/CN2011/077733 CN2011077733W WO2012113203A1 WO 2012113203 A1 WO2012113203 A1 WO 2012113203A1 CN 2011077733 W CN2011077733 W CN 2011077733W WO 2012113203 A1 WO2012113203 A1 WO 2012113203A1
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WIPO (PCT)
Prior art keywords
ground
grounding
layer
pcb
usb interface
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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PCT/CN2011/077733
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English (en)
French (fr)
Inventor
郭健
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ZTE Corp
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ZTE Corp
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Publication date
Application filed by ZTE Corp filed Critical ZTE Corp
Priority to EP11859174.2A priority Critical patent/EP2680376B1/en
Priority to US14/000,716 priority patent/US9142898B2/en
Publication of WO2012113203A1 publication Critical patent/WO2012113203A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R12/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
    • H01R12/70—Coupling devices
    • H01R12/7082—Coupling device supported only by cooperation with PCB
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/648—Protective earth or shield arrangements on coupling devices, e.g. anti-static shielding  
    • H01R13/658—High frequency shielding arrangements, e.g. against EMI [Electro-Magnetic Interference] or EMP [Electro-Magnetic Pulse]
    • H01R13/6591—Specific features or arrangements of connection of shield to conductive members
    • H01R13/6594—Specific features or arrangements of connection of shield to conductive members the shield being mounted on a PCB and connected to conductive members
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R35/00—Flexible or turnable line connectors, i.e. the rotation angle being limited
    • H01R35/04—Turnable line connectors with limited rotation angle with frictional contact members
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R35/00—Flexible or turnable line connectors, i.e. the rotation angle being limited
    • H01R35/02—Flexible line connectors without frictional contact members

Definitions

  • a rotating USB interface device A rotating USB interface device
  • the present invention relates to the field of communication technologies, and in particular, to a universal serial BUS (USB) interface device in a terminal device.
  • USB universal serial BUS
  • the OTA test verifies the connectivity of wireless devices to the network and the impact of wireless device users on radiation and reception performance.
  • the OTA indicator includes Total Radiated Power (TRP) and Total Isotropic Sensitivity (TIS). ) indicators of these two aspects.
  • TRP measures the radiation performance of a wireless device. The larger the TRP value, the better the wireless device's radiation performance.
  • TIS measures the receiving performance of the wireless device. The smaller the TIS value, the better the wireless device's receiving performance.
  • FIG. 1 is a 3D appearance diagram of a conventional rotating USB interface type data card, wherein the USB portion is rotatable relative to a Printed Circuit Board (PCB) portion.
  • PCB Printed Circuit Board
  • FIG. 2 is a plan view of a conventional USB-based rotating USB interface type data card
  • FIG. 3 is a side view of the data card shown in FIG. 2
  • FIG. 4 is a 3D effect view of the data card shown in FIG. 2 and FIG. Includes a partial enlarged view of the rotating portion.
  • the grounding path of the data card mainly includes a grounding wire 20 in the USB 10, a rotating shaft 30 in contact with the grounding wire 20, a spring piece or a pressing piece 40 contacting the rotating shaft 30, and a flexible circuit.
  • FPC flexible printed circuit
  • the width of the ground wire 20, the FPC of the USB 10, or the ground wire 50 in the cable is limited by
  • the overall structure of the data card, and the contact mode of the rotating shaft 30, the spring piece or the copper grounding area 60 of the pressing piece 40 is generally a point contact manner, and these factors reduce the good grounding performance of the data card.
  • the 800MHz and 900MHz TRP/TIS indicators were relatively poor. It can be seen that the good grounding performance of the rotating USB interface type data card is directly related to the OTA low frequency indicator of the antenna 80.
  • Fig. 5 it is a modified top view of a conventional rotating USB interface type data card
  • Fig. 6 is a side view of the data card shown in Fig. 5.
  • FIG. 6 and Figure 5 show a side view of the traditional grounding method for improving the rotating USB interface type data card.
  • a shield frame cover 90, a conductive foam 102, a data card housing 103, and a conductive lacquer layer 101 sprayed on a portion of the data card housing 103 are introduced.
  • the improved data card passes through the conductive paint layer 101 and the conductive foam 102, and the elastic piece or the pressing piece 40 establishes a large-area connection with the shield frame cover 90 to form a ground loop.
  • This ground loop improves the data card itself to some extent. Grounding effect, but the improvement effect still can not meet the data card's demand for good grounding performance.
  • the OTA index of the data card is still poor, and the transmitting and receiving performance is not good. Moreover, this data card structure still has certain defects: On the one hand, the use of the conductive paint layer and the conductive foam increases the manufacturing cost of the data card; on the other hand, the introduction of additional components leads to a cumbersome production process of the data card. Summary of the invention
  • the embodiment of the invention provides a rotating USB interface device, which is used to solve the problem that the existing rotating USB interface device has a complicated structure and the OTA index is poor, resulting in poor transmission and reception performance.
  • a rotating USB interface device including:
  • the USB module rotates relative to the PCB through the rotating shaft
  • the first ground wire included in the USB module is connected to the rotating shaft, and the rotating shaft is connected to the conductive medium layer, and is shaped The first ground path of the USB module;
  • An insulating dielectric layer is disposed between the ground layer above the PCB and the conductive dielectric layer to isolate the first ground via from a second ground via formed by a ground plane of the PCB.
  • the thickness of the insulating dielectric layer, the area of the conductive dielectric layer, and the area of the ground layer are set according to an open circuit voltage after the first ground via is isolated from the second ground via of the PCB.
  • the insulating dielectric layer is an insulating material.
  • the insulating dielectric layer is the PCB board.
  • the conductive medium layer is a metal material or an easy conductor material.
  • the metal material is selected from one or a combination of the following materials: stainless steel and copper.
  • the easy conductor material comprises a conductive cloth.
  • the rotating USB interface device isolates the first grounding path of the USB module from the second grounding path formed by the grounding layer of the PCB board by providing an insulating dielectric layer to form an open circuit voltage, and maintains the USB module and the PCB board grounded.
  • the voltage difference between the channels is stable, so that the entire device obtains a stable ground signal, improves the grounding performance, and improves the transmitting and receiving performance of the device.
  • the device has the advantages of simple structure, complicated structure of the existing equipment, cumbersome manufacturing process and high cost, and is simple, low-cost and can be produced compared with the conventional sprayed conductive paint and conductive foam. Strong and easy to implement.
  • FIG. 1 is a perspective view of a conventional rotating USB interface device 3D in the prior art
  • FIG. 2 is a top view of a conventional USB grounding device in the prior art
  • FIG. 3 is a view of the device shown in FIG. Side view
  • FIG. 4 is a 3D effect diagram of the device shown in FIG. 2 and FIG. 3 in the prior art
  • FIG. 5 is a top plan view showing an improved rotary USB interface device in the prior art
  • FIG. Figure 6 is a side view of the apparatus shown in Figure 5 in the prior art
  • FIG. 7 is a schematic structural diagram of a rotating USB interface device according to an embodiment of the present invention
  • FIG. 8 is a top view of a rotating USB interface device according to Embodiment 1 of the present invention.
  • Figure 9 is a side view of the apparatus shown in Figure 8 in the first embodiment of the present invention.
  • FIG. 10 is a 3D effect diagram of the device shown in FIG. 8 and FIG. 9 according to Embodiment 1 of the present invention
  • FIG. 11 is a side view of a rotating USB interface device according to Embodiment 2 of the present invention. detailed description
  • the grounding performance of the rotating USB interface device is poor, and the OTA index is poor, so that the transmitting and receiving performance of the device is not good.
  • the embodiment of the present invention provides a first grounding path and a PCB board of the USB module of the device.
  • the second grounding path is isolated to form a rotating USB type device structure that is open to maintain a stable voltage difference.
  • the structural principle of the rotating USB interface type device is as shown in FIG.
  • the rotating USB interface device provided by the embodiment of the present invention may be a rotating USB interface type data card.
  • An insulating dielectric layer 150 is disposed between the conductive dielectric layer 140 connected to the PCB module and the ground layer 160 of the PCB as shown in FIG. 7 to isolate the second grounding path of the PCB and the first grounding path of the USB module. Open circuit voltage A.
  • the ground layer 160 of the PCB board may be an exposed copper grounding area of the PCB board, or may be a metal carrier connected to the ground on the PCB.
  • the ground plane 160 of the PCB board and the conductive medium layer 140 are separated by the insulating dielectric layer 150, and an open structure is formed between the conductive medium layer 140 and the ground layer 160, and the open circuit structure maintains between the PCB board and the USB module.
  • the voltage difference is stable to improve the TIS low frequency index and obtain good transmit and receive performance.
  • the insulating dielectric layer 150 may be a PCB board or other insulating material.
  • FIG. 8 is a top view of the device of the rotary USB interface device
  • FIG. 9 is a side view of the device, which is shown in FIG. 8 , FIG. 9 , and FIG. Figure 10 is a 3D rendering of the device.
  • the rotating USB interface device includes: a USB module 110, a first ground 120 in the USB module 110, a rotating shaft 130, a conductive dielectric layer 140, an insulating dielectric layer 150, a PCB board 170, and a ground layer 160 on the PCB board 170.
  • the ground layer 160 is taken as an example of the exposed copper grounding area on the PCB board 170.
  • the rotating USB interface device has a USB module 110 that is rotated relative to the PCB by the rotating shaft 130.
  • the first ground 120 included in the USB module 110 is connected to the rotating shaft 130, and the rotating shaft 130 is connected to the conductive medium layer 140.
  • the dielectric layer 140 and the rotating shaft 130 and the first ground 120 of the USB module 110 implement a path to form a first grounding path of the USB module 110; a ground layer (ie, an exposed copper grounding region) 160 and a conductive dielectric layer 140 on the PCB board 170;
  • An insulating dielectric layer 150 is disposed therebetween to isolate the first ground via from the second ground via of the PCB board 170. Wherein the ground layer 160 on the PCB 170 forms a second ground via on the PCB.
  • the thickness of the insulating dielectric layer 150, the area of the conductive dielectric layer 140, and the area of the ground layer 160 are set according to the open circuit voltage after the first ground via is isolated from the second ground via of the PCB 170.
  • the conductive medium layer is a metal material or an easy conductor material.
  • the metal material is selected from one or a combination of the following materials: stainless steel and copper.
  • Conductive cloth can be used as the conductive material.
  • the rotating USB interface device provided by the second embodiment of the present invention has a structure as shown in FIG. 11 , wherein FIG. 11 is a side view of the device, and the rotating USB interface device includes: a USB module 110 and a first one of the USB modules 110 The ground line 120, the rotating shaft 130, the conductive medium layer 140, the PCB board 170, and the ground layer 160 on the PCB board 170.
  • the PCB board 170 is also used as an insulating dielectric layer at the same time, so that it is not necessary to provide the special insulating dielectric layer 150 as in the first embodiment.
  • the first ground line 120 in the USB module 110 and the USB module 110 in this embodiment is rotated.
  • the shaft 130 and the conductive medium layer 140 are disposed on a side of the PCB board 170 opposite to the ground layer 160 to achieve the purpose of the PCB board 170 as an insulating dielectric layer.
  • the first ground via of the USB module 110 formed by the first ground 120 in the conductive medium layer 140, the rotating shaft 130, and the USB module 110 is separated from the second ground via formed by the ground layer 160 on the PCB 170 by the PCB board 170.
  • the rotating USB interface device provided in the first embodiment and the second embodiment provides an open circuit structure between the USB module 110 of the USB interface device and the ground path of the PCB board 170, so that the first ground path and the PCB of the USB module 110 are provided.
  • the second ground vias of the board 170 are separated such that the outer conductor of the USB module 110 has a voltage effect in the open space state through the conductive dielectric layer 140 and the ground plane 160 of the PCB board 170, forming an open circuit voltage A. If the size of the conductive dielectric layer 140 is determined, the thickness of the insulating dielectric layer 150 is determined, and the area of the ground layer 160 of the PCB 170 is determined, the open circuit voltage A will remain constant, so that the uncertainty of the voltage introduced by the rotating shaft 130 follows the voltage.
  • A constitutes the main voltage difference of the entire data card structure, so that the voltage difference between the first ground line 120 of the USB module 110 and the outer metal wall and the ground layer 160 of the PCB board 170 can be opened
  • the voltage A is determined to stabilize the ground signal obtained by the entire data card structure. Because the low frequency index of the rotating USB interface device in the prior art, especially the TIS index deviation, is caused by the accumulation of point contact structures of multiple contact points, resulting in instability and uncertainty of the ground signal, therefore, the open circuit voltage is introduced through the open circuit structure.
  • a to maintain the stability of the grounding signal of the rotating USB interface device can achieve the purpose of improving the OTA low frequency indicator, especially the TIS indicator.
  • the rotating USB interface device provided by the embodiment of the present invention can be used for Time Division-Synchronous Code Division Multiple Access (TD-SCDMA) and Wideband Code Multiple Access (Wide-Band Code). Class Multiple Access, WCDMA), Evolution Data Only (EVDO), and other types of terminal devices or wireless devices.
  • the purpose of maintaining the ground signal is stabilized by isolating the first ground path of the USB module from the second ground path of the PCB.
  • the device is simple in structure,
  • the utility model overcomes the defects of complicated structure, cumbersome manufacturing process and high cost of the existing equipment, and is simple, low-cost, high-productivity and easy to operate compared with the conventional spray conductive paint and conductive foam. Implementation plan.
  • the TIS low frequency indicator of the rotating USB interface device is improved, and the TRP performance of the device is ensured, thereby ensuring the good transmission and reception performance of the device.
  • the device provided by the embodiment of the present invention is provided for a rotating USB interface device.
  • 62 and 124 are channel values, and dBm is the unit of measure of TIS.
  • the embodiment of the present invention is provided for another rotating USB interface device.
  • 1, 62 and 124 are channel values, and dBm is the unit of measure of TIS.
  • the TIS data obtained by the test in the above-mentioned Table 1 and Table 2 can be seen that the TIS of the rotating USB interface device using the open architecture provided by the embodiment of the present invention is greatly improved, and therefore, the open architecture is adopted.
  • Rotating USB interface devices have better transmit and receive performance than traditional rotary USB interface devices.

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Description

一种旋转 USB接口类设备 技术领域
本发明涉及通讯技术领域， 尤其涉及终端设备中的旋转通用串行总线 ( Universal Serial BUS , USB )接口类设备。 背景技术
在旋转 USB接口类数据卡的设计过程中，如何保证旋转 USB接口的良 好性， 是决定数据卡的空中下载（Over The Air, OTA )低频指标的必要因 素之一。 通过 OTA测试可以验证无线设备与网络的连接能力及无线设备使 用者对辐射和接收性能的影响， OTA指标包含全向辐射功率（ Total Radiated Power, TRP )和全向接收灵敏度（ Total Isotropic Sensitivity, TIS )这两方 面的指标。 TRP衡量无线设备的辐射性能， TRP值越大， 表示无线设备辐 射性能越好； TIS衡量无线设备的接收性能， TIS值越小， 表示无线设备接 收性能越好。
图 1为一种常规旋转 USB接口类数据卡的 3D外观效果图，其中， USB 部分可相对于印制电路板 ( Printed Circuit Board , PCB )部分旋转。
图 2为常规接地方式的旋转 USB接口类数据卡的俯视图， 图 3为图 2 所示的数据卡的侧视图，图 4表示为图 2和图 3所示的数据卡的 3D效果图， 其中包括旋转部分的局部放大图。 参考图 2、 图 3和图 4, 该数据卡的接地 通路主要包括 USB 10中的地线 20, 与地线 20相接触的转轴 30, 与转轴 30相接触的弹片或压片 40, 柔性电路板 ( Flexible Printed Circuit, FPC )或 线缆中的地线 50, 与弹片或压片 40相连接的 PCB 70上的表露覆铜接地区 域 60。
一般来说， USB 10的地线 20、 FPC或线缆中的地线 50的宽度受限于 数据卡的整体结构的大小， 且转轴 30、 弹片或压片 40 铜接地区域 60 的接触方式一般是点接触的方式， 这些因素降低了数据卡接地性能的良好 性。 对现有旋转 USB接口类数据卡进行 OTA测试时， 发现其 800MHz和 900MHz的 TRP/TIS指标都比较差。 可见， 旋转 USB接口类数据卡接地性 能的良好性直接关系到天线 80的 OTA低频指标。
为了提高旋转 USB接口类数据卡的接地性能，可以对旋转 USB接口类 数据卡的结构进行改进。 如图 5所示， 即为现有的一种旋转 USB接口类数 据卡改进后的俯视图， 图 6为图 5所示的数据卡的侧视图。
从图 5和图 6所示的对传统的旋转 USB接口类数据卡的接地方式进行 改进后的数据卡的结构可以看到：
图 6和图 5所表示的传统改善旋转 USB接口类数据卡接地方式的侧视 效果图。 在图 2的基础上， 引入了屏蔽架罩 90, 导电泡棉 102, 数据卡外 壳 103 , 及喷涂于部分数据卡外壳 103上的导电漆层 101。 改进后的数据卡 通过导电漆层 101和导电泡棉 102,弹片或压片 40与屏蔽架罩 90建立了大 面积的连接， 形成接地回路， 这种接地回路一定程度上改善了数据卡自身 的接地效果， 但改善的效果仍然不能满足数据卡对良好接地性能的需求， 数据卡的 OTA指标仍然比较差， 发射接收性能也不佳。 且这种数据卡结构 仍然存在一定的缺陷： 一方面导电漆层和导电泡棉的使用增加了数据卡的 制作成本； 另一方面， 额外部件的引入导致数据卡的生产工艺繁瑣化。 发明内容
本发明实施例提供一种旋转 USB接口类设备，用以解决现有旋转 USB 接口类设备结构复杂、 OTA指标差导致发射接收性能不佳的问题。
一种旋转 USB接口类设备， 包括：
USB模块通过转轴实现相对 PCB板的旋转； 其中，
USB模块中包括的第一地线与转轴相连， 转轴与导电介质层相连， 形 成 USB模块的第一接地通路；
PCB 板上面的接地层与所述导电介质层之间设置绝缘介质层， 将所述 第一接地通路与 PCB板的接地层形成的第二接地通路隔离。
上述设备， 所述绝缘介质层的厚度、 导电介质层的面积大小、 接地层 的面积大小根据设置的所述第一接地通路与 PCB板的第二接地通路隔离后 的开路电压设置。
上述设备， 所述绝缘介质层为绝缘材质。
上述设备， 所述绝缘介质层为所述 PCB板。
上述设备， 所述导电介质层为金属材料或易导体材料。
上述设备， 所述金属材料选用下列材料之一或组合： 不锈钢和铜。 上述设备， 所述易导体材料包括导电布。
本发明有益效果如下：
本发明实施例提供的旋转 USB 接口类设备， 通过设置绝缘介质层将 USB模块的第一接地通路与 PCB板的接地层形成的第二接地通路隔离， 形 成开路电压， 维持 USB模块和 PCB板接地通路之间的压差稳定，使整个设 备获取到稳定的接地信号， 提高了接地性能， 改善了设备的发射接收性能。 该设备结构简单、 克服了现有设备结构复杂， 制作工艺繁瑣， 成本高的缺 陷， 相比于传统的喷导电漆、 贴导电泡棉等方式而言， 是一种简约、 低成 本、 可生产性强、 操作简易的实现方案。 附图说明
图 1为现有技术中常规旋转 USB接口类设备 3D外观效果图； 图 2为现有技术中常规接地方式的旋转 USB接口类设备俯视图； 图 3为现有技术中图 2所示的设备的侧视图；
图 4为现有技术中图 2和图 3所示的设备的 3D效果图；
图 5为现有技术中旋转 USB接口类设备改进后的俯视图； 图 6为现有技术中图 5所示的设备的侧视图；
图 7为本发明实施例中旋转 USB接口类设备的结构原理示意图； 图 8为本发明实施例一中旋转 USB接口类设备俯视图；
图 9为本发明实施例一中图 8所示的设备的侧视图；
图 10为本发明实施例一中图 8和图 9所示的设备的 3D效果图； 图 11为本发明实施例二中旋转 USB接口类设备侧视图。 具体实施方式
为了使本发明所要解决的技术问题、 技术方案及有益效果更加清楚、 明白， 以下结合附图和实施例， 对本发明进行进一步详细说明。 应当理解， 此处所描述的具体实施例仅仅用以解释本发明， 并不用于限定本发明。
针对现有技术中旋转 USB接口类设备接地性能差， 导致 OTA指标差， 使得设备的发射接收性能不佳的问题， 本发明实施例提供一种将设备的 USB模块第一接地通路和 PCB板的第二接地通路隔离， 形成开路来维持稳 定的电压差的旋转 USB类设备结构，该旋转 USB接口类设备的结构原理如 图 7所示。 优选的， 本发明实施例提供的旋转 USB接口类设备可以是一种 旋转 USB接口类数据卡。
如图 7所示的在与 PCB模块相连的导电介质层 140和 PCB板的接地层 160之间设置绝缘介质层 150, 实现将 PCB板第二接地通路和 USB模块的 第一接地通路隔离， 形成开路电压 A。 其中， 上述 PCB板的接地层 160可 以是 PCB板的表露覆铜接地区域， 也可以是 PCB上与地连接的金属载体。
通过绝缘介质层 150, 将 PCB板的接地层 160和导电介质层 140相隔 离， 在导电介质层 140和接地层 160之间形成构成一个开路结构， 通过该 开路结构维持 PCB板和 USB模块之间的电压差稳定，以提升 TIS低频指标， 获取良好的发射接收性能。绝缘介质层 150可以为 PCB板或其他绝缘材质。
实施例一 本发明实施例一提供的旋转 USB接口类设备， 其结构如图 8、 图 9、 图 10所示， 其中， 图 8为该旋转 USB接口类设备的俯视图， 图 9为该设 备的侧视图， 图 10为该设备的 3D效果图。 该旋转 USB接口类设备包括： USB模块 110、USB模块 110中的第一地线 120、转轴 130、导电介质层 140、 绝缘介质层 150、 PCB板 170和 PCB板 170上的接地层 160。 此处， 以接 地层 160为 PCB板 170上的表露覆铜接地区域为例。
上述旋转 USB接口类设备， 其 USB模块 110通过转轴 130实现相对 PCB板的旋转； 其中， USB模块 110中包括的第一地线 120与转轴 130相 连， 转轴 130与导电介质层 140相连， 这样导电介质层 140、 转轴 130与 USB模块 110中第一地线 120实现通路， 形成 USB模块 110的第一接地通 路； PCB板 170上面的接地层（即表露覆铜接地区域） 160与导电介质层 140之间设置绝缘介质层 150,将第一接地通路与 PCB板 170的第二接地通 路隔离。其中， PCB板 170上的接地层 160形成 PCB板上的第二接地通路。
上述绝缘介质层 150的厚度、导电介质层 140的面积大小、接地层 160 的面积大小根据设置的第一接地通路与 PCB板 170的第二接地通路隔离后 的开路电压设置。
上述导电介质层为金属材料或易导体材料。 其中， 金属材料选用下列 材料之一或组合： 不锈钢和铜等。 易导体材料可以选用导电布等。
实施例二
本发明实施例二提供的旋转 USB接口类设备， 其结构如图 11所示， 其中图 11为该设备的侧视图，该旋转 USB接口类设备包括： USB模块 110、 USB模块 110中的第一地线 120、 转轴 130、 导电介质层 140、 PCB板 170 和 PCB板 170上的接地层 160。 其中， PCB板 170同时也作为绝缘介质层 使用， 从而不需要如实施例一中那样设置专门绝缘介质层 150。
因此， 该实施例 USB模块 110、 USB模块 110中的第一地线 120、 转 轴 130、 导电介质层 140设置在 PCB板 170的与接地层 160相背的一侧， 来实现由 PCB板 170作为绝缘介质层的目的。 通过 PCB板 170, 将导电介 质层 140、 转轴 130、 USB模块 110中第一地线 120形成的 USB模块 110 的第一接地通路与 PCB板 170上的接地层 160形成的第二接地通路隔离。
上述实施例一和实施例二提供的旋转 USB接口类设备， 在旋转 USB 接口类设备的 USB模块 110和 PCB板 170的接地通路之间建立开路结构， 使得 USB模块 110的第一接地通路和 PCB板 170的第二接地通路分开，这 样 USB模块 110的外导体通过导电介质层 140与 PCB板 170的接地层 160 在开路空间状态下存在电压效应， 形成开路电压 A。 若导电介质层 140的 面积大小确定、 绝缘介质层 150厚度确定、 PCB170的接地层 160面积大小 确定， 则该开路电压 A将维持恒定， 这样转轴 130所引入的电压的不确定 性则随着电压 A的存在可以忽略， 那么可以判定 A构成整个数据卡结构的 主要电压差， 从而 USB模块 110的第一地线 120及外金属壁和 PCB板 170 的接地层 160之间的电压差可以通过开路电压 A来决定， 使整个数据卡结 构所获取的接地信号趋于稳定。由于现有技术中旋转 USB接口类设备 OTA 低频指标尤其是 TIS指标偏差的根源在于多个接触点的点接触结构累加导 致接地信号的不稳定性与不确定性， 因此， 通过开路结构引入开路电压 A 来维持旋转 USB接口类设备接地信号的稳定性，可以很好的达到提升 OTA 低频指标尤其是 TIS指标的目的。
本发明实施例提供的旋转 USB接口类设备， 可用于时分同步码分多址 接入 ( Time Division-Synchronous Code Division Multiple Access , TD-SCDMA )类、 宽带码分多址接入 ( Wide-band Code Division Multiple Access, WCDMA )类、 演进数据（ Evolution Data Only, EVDO )类等各种 类型的终端设备或无线设备。通过将 USB模块的第一接地通路和 PCB板的 第二接地通路隔离开来， 实现维持接地信号稳定的目的。 该设备结构简单、 克服了现有设备结构复杂、 制作工艺繁瑣、 成本高的缺陷， 相比于传统的 喷导电漆、 贴导电泡棉等方式而言， 是一种简约、 低成本、 可生产性强、 操作简易的实现方案。 同时， 通过简单的开路结构， 提升了旋转 USB接口 类设备 TIS低频指标， 保证了设备的 TRP性能， 从而保证了设备的发射接 收性能的良好。
如下表 1所示， 为一款旋转 USB接口类设备采用本发明实施例提供的
Figure imgf000009_0001
表 1
其中， 62和 124为信道值， dBm为 TIS的计量单位。
如下表 2所示， 为另一款旋转 USB接口类设备采用本发明实施例提供
Figure imgf000009_0002
表 2
其中， 1、 62和 124为信道值， dBm为 TIS的计量单位。
由上表 1和表 2中给出的测试得到的 TIS数据可以看出， 采用本发明 实施例提供的开路架构的旋转 USB接口类设备的 TIS得到较大程度的提 高， 因此，采用开路架构的旋转 USB接口类设备相对传统的旋转 USB接口 类设备具有更好的发射接收性能。
上述说明示出并描述了本发明的一个优选实施例， 但如前所述， 应当 理解本发明并非局限于本文所披露的形式， 不应看作是对其他实施例的排 除， 而可用于各种其他组合、 修改和环境， 并能够在本文所述发明构想范 围内， 通过上述教导或相关领域的技术或知识进行改动。 而本领域人员所 进行的改动和变化不脱离本发明的精神和范围， 则都应在本发明所附权利 要求的保护范围内。

Claims

权利要求书
1、 一种旋转通用串行总线 （USB )接口类设备， 其特征在于， 包括： USB模块通过转轴实现相对 PCB板的旋转； 其中，
USB模块中包括的第一地线与转轴相连， 转轴与导电介质层相连， 形 成 USB模块的第一接地通路；
PCB 板上面的接地层与所述导电介质层之间设置绝缘介质层， 将所述 第一接地通路与 PCB板的接地层形成的第二接地通路隔离。
2、 如权利要求 1所述的设备， 其特征在于， 所述绝缘介质层的厚度、 导电介质层的面积大小、 接地层的面积大 d、根据设置的所述第一接地通路 与 PCB板的第二接地通路隔离后的开路电压设置。
3、如权利要求 1所述的设备，其特征在于，所述绝缘介质层为所述 PCB 板或其他绝缘材质。
4、 如权利要求 1-3任一所述的设备， 其特征在于， 所述导电介质层为 金属材料或易导体材料。
5、 如权利要求 4所述的设备， 其特征在于， 所述金属材料选用下列材 料之一或组合： 不锈钢和铜。
6、 如权利要求 4所述的设备， 其特征在于， 所述易导体材料包括导电 布。
PCT/CN2011/077733 2011-02-22 2011-07-28 一种旋转usb接口类设备 Ceased WO2012113203A1 (zh)

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