CN102236771A - 读卡器 - Google Patents

读卡器 Download PDF

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Publication number
CN102236771A
CN102236771A CN2010101526209A CN201010152620A CN102236771A CN 102236771 A CN102236771 A CN 102236771A CN 2010101526209 A CN2010101526209 A CN 2010101526209A CN 201010152620 A CN201010152620 A CN 201010152620A CN 102236771 A CN102236771 A CN 102236771A
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CN
China
Prior art keywords
control chip
usb interface
interface
differential signal
card reader
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Pending
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CN2010101526209A
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English (en)
Inventor
孙正衡
梁安刚
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Hongfujin Precision Industry Shenzhen Co Ltd
Hon Hai Precision Industry Co Ltd
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Hongfujin Precision Industry Shenzhen Co Ltd
Hon Hai Precision Industry Co Ltd
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Publication date
Application filed by Hongfujin Precision Industry Shenzhen Co Ltd, Hon Hai Precision Industry Co Ltd filed Critical Hongfujin Precision Industry Shenzhen Co Ltd
Priority to CN2010101526209A priority Critical patent/CN102236771A/zh
Priority to US12/794,800 priority patent/US8307142B2/en
Publication of CN102236771A publication Critical patent/CN102236771A/zh
Pending legal-status Critical Current

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    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06KGRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/0013Methods or arrangements for sensing record carriers, e.g. for reading patterns by galvanic contacts, e.g. card connectors for ISO-7816 compliant smart cards or memory cards, e.g. SD card readers
    • G06K7/0052Methods or arrangements for sensing record carriers, e.g. for reading patterns by galvanic contacts, e.g. card connectors for ISO-7816 compliant smart cards or memory cards, e.g. SD card readers connectors capable of contacting cards of different formats, e.g. memory stick and SD card readers sharing at least one connector contact and the associated signal line, e.g. both using the same signal line for input or output of data

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  • Engineering & Computer Science (AREA)
  • Artificial Intelligence (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Information Transfer Systems (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)

Abstract

一种读卡器,包括一电路板,所述电路板设有一USB接口、一存储卡接口、一常闭开关及一控制芯片。所述控制芯片与所述USB接口及存储卡接口连接,所述存储卡接口用于供一存储卡插接,所述USB接口用于与一电子设备连接,所述常闭开关接在所述USB接口的正差分信号引脚与所述控制芯片的连接线上,所述USB接口的正差分信号引脚及负差分信号引脚与所述控制芯片之间的连接线的长度相等,所述常闭开关用于控制所述正差分信号引脚与所述控制芯片的连接线导通或断开,从而控制所述存储卡与所述电子设备连接或断开。本发明读卡器在使用时可减少拔插次数。

Description

读卡器
技术领域
本发明涉及一种读卡器。
背景技术
通用串行总线(Universal Serial Bus,简称USB)是一种应用在电脑通信领域的接口技术。由于USB接口具有操作简便,所以现在很多电脑周边产品及电子产品都支持USB连接,而电脑主板也顺应潮流提供更多的USB接口。但是使用这些USB装置的时候一般都会遇到下面的情况:
1.当不使用USB装置,如读卡器时,在电脑操作系统上将USB装置移除后发现需要再次使用该USB装置时,只能将该USB装置先拔下然后再次插入电脑USB接口内,这样电脑才能再次识别该USB装置。
2.有些时候使用者第一次将USB设备插入电脑USB接口内,电脑无法识别这个设备,这时就必须将USB设备拔下再重新插入电脑USB接口内,有时候需要反复几次的拔插,电脑才能识别这个USB装置。
这样USB接口被拔插的次数太多,导致电脑USB接口损坏而不能正常地工作。
发明内容
鉴于以上内容,有必要提供一种可以减少拔插次数的读卡器。
一种读卡器,包括一电路板,所述电路板设有一USB接口、一存储卡接口、一常闭开关及一控制芯片,所述控制芯片与所述USB接口及存储卡接口连接,所述存储卡接口用于供一存储卡插接,所述USB接口用于与一电子设备连接,所述常闭开关接在所述USB接口的正差分信号引脚与所述控制芯片的连接线上,所述USB接口的正差分信号引脚及负差分信号引脚与所述控制芯片之间的连接线的长度基本相等,所述常闭开关用于控制所述USB接口的正差分信号引脚与所述控制芯片的连接线导通或断开,从而控制所述存储卡与所述电子设备通讯连接或断开。
本发明读卡器通过设于USB接口的正差分信号引脚及控制芯片之间的连接线上的常闭开关控制所述连接线导通或断开,以控制所述存储卡与所述电子设备连接或断开,从而实现当所述存储卡在电子设备的软件系统上被移除时,不需拔除所述读卡器,只要按压所述按键开关并释放即可使所述存储卡与所述电子设备再次进行通信。
附图说明
下面参照附图结合具体实施方式对本发明作进一步的描述。
图1是本发明读卡器的较佳实施方式的立体图。
图2是图1的另一方向的视图。
图3是图1的电路板的示意图。
图4是图2中电路板与一电子设备及一存储卡的电路框图。
主要元件符号说明
读卡器        100
外壳          10
通孔          12
电路板        20
USB接口       22
存储卡接口    24
控制芯片      26
按键开关      28
存储卡        30
电子设备      40
具体实施方式
请参照图1至图3,本发明读卡器100的较佳实施方式包括一外壳10及一电路板20。
所述外壳10设有一通孔12。
所述电路板20设有一USB接口22、一存储卡接口24、一控制芯片26及一按键开关28。所述控制芯片26与所述USB接口22及存储卡接口24连接,所述按键开关28接在所述USB接口22的正差分信号引脚D+与所述控制芯片26的连接线上。所述电路板20上的所述负差分信号引脚D-与所述控制芯片26的连接线上设有一弯折,如弯折成“S”状,使所述USB接口22的正差分信号引脚D+及负差分信号引脚D-与所述控制芯片26之间的连接线的长度基本相等。所述按键开关28穿过所述通孔12露出,以便于用户对开关28进行操作。所述按键开关28在非按压状态下闭合,且在受到按压时断开。在其他实施方式中,所述按键开关28也可以是其他类型的常闭开关。
请参照图4,使用时,将一存储卡30插接于所述存储卡接口24,将所述USB接口连接至一电子设备40(如电脑)的USB接口上,所述存储卡30与所述电子设备40进行通信。一旦所述存储卡30在电子设备的软件系统上被移除,虽然插接有所述存储卡30的读卡器100仍插于所述电子设备40上,但所述电子设备40已无法识别所述存储卡30。此时,只需按压所述按键开关28并释放,即可使所述存储卡30与所述电子设备40再次进行通信。
本发明读卡器100通过设于USB接口22的正差分信号引脚D+及控制芯片26之间的连接线上的按键开关28控制所述连接线导通或断开,以控制所述存储卡30与所述电子设备40之间通信连接或断开,从而实现当所述存储卡30在电子设备的软件系统上被移除时,不需拔除所述读卡器100,只要按压所述按键开关28并释放即可使所述存储卡30与所述电子设备40再次进行通信。

Claims (3)

1.一种读卡器,包括一电路板,所述电路板设有一USB接口、一存储卡接口、一常闭开关及一控制芯片,所述控制芯片与所述USB接口及存储卡接口连接,所述存储卡接口用于供一存储卡插接,所述USB接口用于与一电子设备连接,所述常闭开关接在所述USB接口的正差分信号引脚与所述控制芯片的连接线上,所述USB接口的正差分信号引脚及负差分信号引脚与所述控制芯片之间的连接线的长度基本相等,所述常闭开关用于控制所述USB接口的正差分信号引脚与所述控制芯片的连接线导通或断开,从而控制所述存储卡与所述电子设备通讯连接或断开。
2.如权利要求1所述的读卡器,其特征在于:所述读卡器还包括一外壳,所述外壳设有一通孔,所述开关为一按键开关,所述按键开关穿过所述通孔并露在所述外壳外面,所述按键开关在非按压状态下闭合,且在受到按压时断开。
3.如权利要求1所述的读卡器,其特征在于:所述负差分信号引脚与所述控制芯片的连接线上设有一S状弯折,使所述正差分信号引脚及负差分信号引脚与所述控制芯片之间的连接线的长度相等。
CN2010101526209A 2010-04-22 2010-04-22 读卡器 Pending CN102236771A (zh)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN2010101526209A CN102236771A (zh) 2010-04-22 2010-04-22 读卡器
US12/794,800 US8307142B2 (en) 2010-04-22 2010-06-07 Card reader with USB interface

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Application Number Priority Date Filing Date Title
CN2010101526209A CN102236771A (zh) 2010-04-22 2010-04-22 读卡器

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CN (1) CN102236771A (zh)

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US8307142B2 (en) 2012-11-06

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Application publication date: 20111109