WO2013152596A1 - 具有信息防护功能的成像装置 - Google Patents

具有信息防护功能的成像装置 Download PDF

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Publication number
WO2013152596A1
WO2013152596A1 PCT/CN2012/085941 CN2012085941W WO2013152596A1 WO 2013152596 A1 WO2013152596 A1 WO 2013152596A1 CN 2012085941 W CN2012085941 W CN 2012085941W WO 2013152596 A1 WO2013152596 A1 WO 2013152596A1
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WO
WIPO (PCT)
Prior art keywords
interface
unit
switch
protection function
information protection
Prior art date
Application number
PCT/CN2012/085941
Other languages
English (en)
French (fr)
Inventor
孙万里
Original Assignee
珠海赛纳打印科技股份有限公司
Priority date (The priority date 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 date listed.)
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Publication date
Application filed by 珠海赛纳打印科技股份有限公司 filed Critical 珠海赛纳打印科技股份有限公司
Priority to JP2015504839A priority Critical patent/JP6063556B2/ja
Publication of WO2013152596A1 publication Critical patent/WO2013152596A1/zh
Priority to US14/514,346 priority patent/US9104957B2/en

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Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K15/00—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers
    • G06K15/40—Details not directly involved in printing, e.g. machine management, management of the arrangement as a whole or of its constitutive parts
    • G06K15/4045—Managing the interface to the data source, e.g. choosing an interface for data reception
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F21/60—Protecting data
    • G06F21/606—Protecting data by securing the transmission between two devices or processes
    • G06F21/608—Secure printing
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F13/38—Information transfer, e.g. on bus
    • G06F13/42—Bus transfer protocol, e.g. handshake; Synchronisation
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/12—Digital output to print unit, e.g. line printer, chain printer
    • G06F3/1201—Dedicated interfaces to print systems
    • G06F3/1202—Dedicated interfaces to print systems specifically adapted to achieve a particular effect
    • G06F3/1222—Increasing security of the print job
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/12—Digital output to print unit, e.g. line printer, chain printer
    • G06F3/1201—Dedicated interfaces to print systems
    • G06F3/1223—Dedicated interfaces to print systems specifically adapted to use a particular technique
    • G06F3/1229—Printer resources management or printer maintenance, e.g. device status, power levels
    • G06F3/1231—Device related settings, e.g. IP address, Name, Identification
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/12—Digital output to print unit, e.g. line printer, chain printer
    • G06F3/1293—Printer information exchange with computer
    • G06F3/1294—Status or feedback related to information exchange
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/12—Digital output to print unit, e.g. line printer, chain printer
    • G06F3/1297—Printer code translation, conversion, emulation, compression; Configuration of printer parameters
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K15/00—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers
    • G06K15/40—Details not directly involved in printing, e.g. machine management, management of the arrangement as a whole or of its constitutive parts
    • G06K15/4095—Secure printing
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2221/00—Indexing scheme relating to security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F2221/21—Indexing scheme relating to G06F21/00 and subgroups addressing additional information or applications relating to security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F2221/2105—Dual mode as a secondary aspect

Definitions

  • the present invention relates to an image forming apparatus structural technique, and more particularly to an image forming apparatus having an information protection function. Background technique
  • the imaging device As one of the important devices in the existing office environment, the imaging device has become a must-have device for offices and homes. In order to save resources, it is common for multiple computers to share an imaging device, such as a printer or a scanner.
  • multiple computers can be imaged using the same printer in a shared mode, that is, the first computer connected to the printer has shared characteristics by setting device attributes, and the second computer is based on sharing mode.
  • the first computer controls the printer to achieve a print job.
  • the premise of this mode of operation is that the first computer must be in a working state. In order to enable the second computer to print and the first computer is always in working state, it is obviously a waste of energy.
  • the imaging device includes a USB control unit 20 and n USB interfaces 30 in addition to the conventional imaging control unit 10.
  • the USB control unit 20 controls the data transmission of each USB interface 30, specifically, which USB interface 30 is controlled to perform data transmission with the imaging control unit 10.
  • the n computers (PCs) 40 are respectively connected to the n USB ports 30 of the image forming apparatus by n USB buses, and communication with the imaging control unit 10 is realized.
  • the present invention provides an image forming apparatus having an information protection function to prevent data communication between different computers by connecting an image forming apparatus, thereby reducing safety hazards.
  • the present invention provides an imaging device having an information protection function, including an imaging control unit, an interface control unit, and at least two interfaces, and further includes:
  • the switch unit is disposed between the interface and the interface control unit for switching physical connection or physical isolation between the interface and the interface control unit.
  • the image forming apparatus having the information protection function as described above preferably further includes: a switch trigger unit connected to the switch unit for controlling a switching operation of the switch unit.
  • the switching switch unit is a single-pole multi-throw switch or a semiconductor switch circuit.
  • the switch trigger unit is a switch button.
  • the switch triggering unit is a trigger circuit including a control input terminal and a control output terminal, and the control input terminal is configured to input a control command signal, and the control output terminal is configured as described above.
  • the trigger circuit Connected to the switch unit, the trigger circuit converts the control command signal into a control switch signal output from the control output to the switch unit.
  • the interface is a serial communication bus interface.
  • the imaging device with the information protection function as described above preferably further includes a monitoring unit, which is connected between the switch triggering unit and each interface, and the monitoring unit specifically includes:
  • a signal monitoring subunit for monitoring an input level signal and an output level signal at each interface
  • a switching triggering subunit configured to output a control command signal to the switch triggering unit according to the interface for monitoring the input level signal to trigger the physical connection between the interface that generates the level signal and the interface control unit.
  • the monitoring unit further includes:
  • the priority control subunit is configured to select an interface according to a preset priority policy when the input level signal is generated at the at least two interfaces, and notify the switching trigger subunit of the selected interface.
  • the monitoring unit further includes:
  • the status notification subunit is configured to send a busy status notification or an idle status notification of the imaging device to each interface according to the output level signal at the monitored interface.
  • the imaging unit having the information protection function as described above is integrated in the imaging control unit or independently of the imaging control unit.
  • the image forming apparatus having the information protection function as described above preferably further includes: an interface state indicating unit configured to indicate a connected state of each interface according to the monitored input level signal or output level signal of each interface.
  • the interface state indicating unit is a light emitting diode, and the light emitting diode and/or its color correspond to a connected state of each interface.
  • the interface state indicating unit is a display for displaying the connected state of each interface.
  • the image forming apparatus with information protection function as described above preferably further includes: a default interface switching unit connected to the switch triggering unit for outputting control to the switch triggering unit when a default reset condition is detected
  • the command signal in order to trigger the switch, physically connects the preset default interface with the interface control unit.
  • the image forming apparatus having the information protection function as described above is preferably:
  • the default reset condition is a power-on restart signal or a sleep wake-up signal
  • the monitoring unit of the imaging device further includes a timing subunit for timing the input level signal monitored by the signal monitoring subunit and generating an input level signal within a preset timing value range.
  • the imaging device provided by the present invention maintains the physical connection or physical isolation between the interface and the interface control unit by the switch unit, thereby reducing the possibility of communication between the interfaces through the interface control unit, thereby preventing the user data from leaking through the connected interface. , thus reducing network security
  • FIG. 1 is a schematic structural view of an image forming apparatus in the prior art
  • FIG. 2 is a schematic structural diagram of an image forming apparatus with information protection function according to Embodiment 1 of the present invention
  • FIG. 3 is a schematic structural diagram of an image forming apparatus with information protection function according to Embodiment 2 of the present invention
  • the image forming apparatus includes an imaging control unit 1, an interface control unit 2, and at least two interfaces 3, and further includes a switch unit 4, which is disposed at Between the interface 3 and the interface control unit 2, it is used to switch physical connection or physical isolation between the interface 3 and the interface control unit 1.
  • the imaging device may be of any type, such as a common printer, scanner, etc.
  • the imaging control unit 1 is a chip or circuit that mainly controls imaging in the imaging device, which interacts with the computer to transmit data and control imaging.
  • the interface control unit 2 and the interface 3 are data transmission interfaces that follow a certain protocol, such as a USB interface, for example, the USB interface control unit can use a conventional USB control chip or circuit for transmitting an external device such as a computer.
  • the data is transmitted to the imaging control unit, and the data sent by the imaging control unit is transmitted to the external device.
  • a switch unit which can implement physical or physical isolation between the interface and the interface control unit, so-called physical connection or physical isolation, that is, whether there is a current signal between the interface and the interface control unit, in physical In the isolated state, the current signal transmission path is disconnected between the interface and the interface control unit, and the current signal cannot be transmitted.
  • physical disconnection or physical isolation achieves electrical disconnection, while software mode usually only prohibits data transmission at the application protocol level, in fact the circuit remains connected. Therefore, the technical solution of the embodiment of the present invention can ensure the possibility of no electrical connection between interfaces through physical isolation, thereby eliminating security risks.
  • the switch unit preferably ensures that only one designated interface can be physically connected to the interface control unit at the same time to complete the imaging operation.
  • the switch unit that realizes physical connection or physical isolation can use mechanical means or electrical means.
  • the switch unit may be a mechanical switch, such as a single-pole double-throw switch, a single-pole multi-throw switch, or the like, which is triggered by mechanical operation, or a combination of a plurality of switch elements.
  • Electrodeic circuit breakers specifically semiconductor switching circuits can be selected to trigger switching by electrical signals.
  • FIG. 3 is an image forming apparatus with information protection function according to Embodiment 2 of the present invention.
  • the present embodiment further includes a switch trigger unit 5 and a switch unit according to the above embodiment.
  • the switch trigger unit can use different structures.
  • the switching unit is a mechanical switch such as a single-pole multi-throw switch
  • the switch trigger unit may be a switching button that directly controls the switching control of the switch.
  • the switch trigger unit may preferably be a trigger circuit including a control input and a control output, the control input is used to input a control command signal, the control output is connected to the switch unit, and the trigger circuit is controlled.
  • the command signal is converted into a control switching signal that is output from the control output to the switch unit.
  • the trigger circuit can be carried by a hardware chip, and the control input can be a chip pin, detecting a level change caused by a button action on an operation panel of the imaging device, or a control command signal caused by a level change caused by a control panel input of the software, or utilizing A control command signal input by an external device in communication with the imaging device, such as a remote controller, a computer, or the like.
  • the control command signal is output from the control output through the processing of the trigger circuit, thereby controlling the switch unit.
  • a transistor of a semiconductor switching circuit can be controlled to be turned on or off by a high and low level signal.
  • the technical solution of the embodiment can realize the user's control of using the imaging device. After the completion of an imaging work task, the user can select again to enable the otherwise gated computer to communicate with the imaging control unit in the imaging device; or not to select, to maintain the previously gated computer capable of continuing with the imaging control described above Unit communication.
  • the imaging device further includes a monitoring unit 6 connected between the switch trigger unit 5 and each interface 3.
  • the monitoring unit 6 specifically includes a signal monitoring subunit. 61 and switch trigger sub-unit 62.
  • signal supervision The measuring unit 61 is configured to monitor the input level signal and the output level signal at each interface 3, and the input level signal is a working level signal input to the interface 3 when the PC needs to perform an imaging operation, and the output level signal is the interface 3
  • the working level signal is sent when the interface control unit 2 is connected; the switching trigger subunit 62 is connected to the signal monitoring subunit 61 for outputting the control command signal to the switch trigger unit 5 according to the interface 3 that monitors the input level signal.
  • the interface 3 that generates the level signal by triggering the switching is in physical communication with the interface control unit 2.
  • the imaging device can automatically complete the switching control of the connection or isolation according to the imaging requirements of the user, without the need for manual selection by the user.
  • the monitoring unit 6 further includes: a priority control sub-unit 6 3 connected to the signal monitoring sub-unit 6 1 for selecting according to a preset priority policy when detecting an input level signal at the at least two interfaces 3 An interface 3 is provided, and the selected interface 3 is notified to the switching trigger sub-unit 62.
  • the priority policy can be pre-configured in the monitoring unit 6, for example, according to the sequence number sequence of the interface 3, the interface for initiating the imaging request is sequentially controlled.
  • the configuration of the priority policy can be configured by the user via a computer, or by the control panel of the imaging device, or by the manufacturer of the imaging device at the factory.
  • the monitoring unit 6 may further comprise a status notification subunit 64 connected to the signal monitoring subunit 61 for transmitting a busy status notification or idle of the imaging device to each interface 3 according to the output level signal at the monitored interface. Status notification.
  • the technical solution can further inform the user of the current working state of the imaging device.
  • the functions of the monitoring unit are not limited to the above, and other functions can be implemented according to requirements.
  • Functional units such as the priority control subunit and the status notification subunit may be set individually or in combination.
  • the monitoring unit monitors the input level signal, it can further identify whether another interface is generating an output level signal at this time, and if not, a control command signal is generated, and if so, no control command signal is generated, and A busy status notification can be sent and transmitted to the user via the corresponding interface.
  • the busy status notification or idle status notification of the imaging device can be sent according to a set period, or when an imaging task is completed, or can be sent directly when busy or idle is detected.
  • the image forming apparatus with the information protection function of the embodiment of the present invention preferably further includes: an interface status indicating unit, configured to indicate a connected state of each interface.
  • the interface status indication unit is connected to the signal monitoring subunit in the monitoring unit, and is configured to input an input level signal according to each interface. The number or output level signal indicates the connectivity status of each interface.
  • the interface status indicating unit may be a light emitting diode (LED), and the LED and/or its color correspond to the connected state of each interface.
  • LED light emitting diode
  • the LED may correspond to the connected state of each interface by its color, that is, the color is used to distinguish the connected state of each interface. If the LED is bright green, it means that the first interface is connected; if the LED is orange, it means the second interface is connected; if the LED is red, it means the third interface is connected.
  • the number of LEDs may be multiple, and each LED corresponds to a connected state of one or more interfaces. When each LED uniquely corresponds to an interface, it is determined whether the interface is connected by whether the LED is lit. If the LED corresponding to the second interface is bright, it means that the second interface is connected. When each LED corresponds to multiple interfaces, it can be determined whether the interfaces are connected by combining the lighting conditions and colors of the LEDs. For example, if one LED corresponds to the first interface and the second interface, the bright green color indicates that the first interface is connected. Bright red indicates that the 2nd interface is connected.
  • the interface status indicating unit may also be a display, such as a liquid crystal display (LCD) or an organic light emitting diode (OLED) display, for displaying the connected state of each interface. For example, the words "the second interface is connected" can be displayed directly on the display.
  • LCD liquid crystal display
  • OLED organic light emitting diode
  • the imaging device provided by the embodiment of the present invention preferably further includes a default interface switching unit, and is connected to the switch triggering unit, configured to output a control command signal to the switch triggering unit to trigger when the default reset condition is detected. Switching physically connects the default default interface to the interface control unit.
  • the default reset condition may be a power-on restart signal or a sleep wake-up signal.
  • the monitoring unit of the imaging device further includes a timing subunit for timing the input level signal monitored by the signal monitoring subunit and not monitoring the input level signal within a preset timing value range. , produces a default reset condition. Thereby the control switch trigger unit physically connects the default interface with the interface control unit.
  • the above technical solution may be applicable, for example, when the printer is restarted or is woken up from the sleep state or the monitoring unit does not monitor the level signal from any interface for more than a predetermined length of time, the control switch trigger unit triggers the switch unit to the default interface, for example, the first interface. Is the default interface.
  • the state in which the above printer is turned back on or is woken up from the sleep state can be determined by the monitoring unit or the switch trigger unit receiving the start signal (power-on signal).
  • the above default interface and predetermined timing value may be preset before the imaging device is shipped from the factory, It can be set by the user through a control device of a printer such as a print driver or a display.
  • the switch trigger unit can also do nothing, that is, maintain the connected state of the last interface.
  • the monitoring unit, the switch unit, and/or the switch trigger unit may be integrated in the imaging control unit, or may be provided independently of the imaging control unit.
  • the monitoring unit, the diverter switch unit and/or the switch trigger unit can be arranged either in one piece or separately.
  • the image forming apparatus with information protection function provided by the invention enables the image forming apparatus to be shared and used by a plurality of computers, and the plurality of computers connected thereto are not connected to each other, thereby ensuring the security of user data.
  • the above embodiments are merely illustrative of the technical solutions of the present invention, and are not intended to be limiting; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art The technical solutions described in the foregoing embodiments may be modified, or some or all of the technical features may be equivalently replaced; and the modifications or substitutions do not deviate from the technical solutions of the embodiments of the present invention. range.

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Abstract

提供了一种具有信息防护功能的成像装置，包括成像控制单元、接口控制单元和至少两个接口，还包括：切换开关单元，设置在接口和接口控制单元之间，用于切换接口与接口控制单元之间的物理连通或物理隔离。本方案所提供的成像装置，通过切换开关单元保持接口与接口控制单元的物理连通或物理隔离，减少了接口之间通过接口控制单元连通的可能性，因此能够避免用户的数据通过连通的接口泄漏，因而减少了网络安全隐患。

Description

具有信息防护功能的成像装置
技术领域 本发明涉及成像装置结构技术， 尤其涉及一种具有信息防护功能的成 像装置。 背景技术
成像装置作为现有办公环境中的重要设备之一， 已经成为办公室和家 用的必备设备。 为了节约资源， 一般都是多台计算机共用一台成像装置， 如打印机、 扫描仪等。
以打印机为例， 通常通过共享方式使多台计算机能使用同一台打印机 成像， 即与打印机连接的第一台计算机通过设置设备属性使其具备有共享 的特性， 第二台计算机基于共享方式， 通过第一台计算机来控制打印机， 从而实现打印作业。 然而， 该种操作方式的前提是要求第一台计算机必须 处于工作状态， 为了能使第二台计算机进行打印而让第一台计算机始终处 于工作状态， 显然会造成能源的浪费。
为了解决上述的问题， 打印机厂商推出了带有多个通用串行总线 ( Un i ver s a l Ser i a l Bus , 简称 USB ) 端口的打印机， 能够同时连接到多 台计算机， 具体结构如图 1所示。 成像装置除常规的成像控制单元 1 0之 夕卜， 还包括一个 USB控制单元 20和 n个 USB接口 30。 其中 USB控制单元 20控制各 USB接口 30的数据传输，具体是切换控制哪个 USB接口 30与成 像控制单元 1 0进行数据传输。 n个计算机（ PC ) 40则利用 n条 USB总线 分别连接到成像装置的 n个 USB接口 30上， 实现与成像控制单元 1 0的通 信。
上述模式中， 由于存在多台 PC 同时连接到 USB控制单元进行通信的 情况， 使得多台 PC间有通过 USB控制单元实现连通的可能， 则 PC中的用 户数据安全受到威胁。 尤其是当多台 PC属于不同网络， 如有的 PC属于局 域网 （有加密保护需求） ， 有的 PC属于公共网络时， 公共网络上的一些 安全隐患如黑客窃取数据、 计算机病毒攻击毁坏数据等会威胁到局域网， 严重时会造成数据丟失、 网络瘫痪等。 发明内容 本发明提供一种具有信息防护功能的成像装置， 以避免不同计算机通 过连接成像装置而实现数据连通， 减少安全隐患。
本发明提供了一种具有信息防护功能的成像装置， 包括成像控制单 元、 接口控制单元和至少两个接口， 还包括：
切换开关单元， 设置在接口和接口控制单元之间， 用于切换接口与接 口控制单元之间的物理连通或物理隔离。
如上所述的具有信息防护功能的成像装置， 优选的是， 还包括： 开关 触发单元，与所述切换开关单元相连，用于控制切换开关单元的切换动作。
如上所述的具有信息防护功能的成像装置， 优选的是， 所述切换开关 单元为单刀多掷开关或半导体开关电路。
如上所述的具有信息防护功能的成像装置， 优选的是， 所述开关触发 单元为切换按钮。
如上所述的具有信息防护功能的成像装置， 优选的是， 所述开关触发 单元为包括控制输入端和控制输出端的触发电路， 所述控制输入端用于输 入控制指令信号， 所述控制输出端与切换开关单元相连， 所述触发电路将 控制指令信号转换为控制切换信号从控制输出端输出给切换开关单元。
如上所述的具有信息防护功能的成像装置， 优选的是， 所述接口为串 行通信总线接口。
如上所述的具有信息防护功能的成像装置， 优选的是， 还包括监控单 元， 连接在开关触发单元和各接口之间， 所述监控单元具体包括：
信号监测子单元， 用于监测各接口处的输入电平信号和输出电平信 号；
切换触发子单元， 用于根据监测到输入电平信号的接口， 向所述开关 触发单元输出控制指令信号， 以触发切换将产生所述电平信号的接口与接 口控制单元物理连通。
如上所述的具有信息防护功能的成像装置， 优选的是， 所述监控单元 还包括： 优先级控制子单元， 用于在监测到至少两个接口处产生输入电平信号 时， 根据预设优先级策略选择一接口， 并将所选择接口通知所述切换触发 子单元。
如上所述的具有信息防护功能的成像装置， 优选的是， 所述监控单元 还包括：
状态通报子单元， 用于根据监测到的接口处的输出电平信号， 向各接 口发送成像装置的忙碌状态通知或空闲状态通知。
如上所述的具有信息防护功能的成像装置，优选的是，所述监控单元、 切换开关单元和 /或开关触发单元集成在所述成像控制单元中或独立于所 述成像控制单元设置。
如上所述的具有信息防护功能的成像装置， 优选的是， 还包括： 接口状态指示单元， 用于根据监测到的各接口的输入电平信号或输出 电平信号， 指示各接口的连通状态。
如上所述的具有信息防护功能的成像装置， 优选的是： 所述接口状态 指示单元为发光二极管， 所述发光二极管和 /或其颜色与各接口的连通状 态对应。
如上所述的具有信息防护功能的成像装置， 优选的是： 所述接口状态 指示单元为显示器， 用于显示各接口的连通状态。
如上所述的具有信息防护功能的成像装置， 优选的是， 还包括： 默认接口切换单元， 与所述开关触发单元相连， 用于在监测到默认复 位条件时， 向所述开关触发单元输出控制指令信号， 以触发切换将预设的 默认接口与接口控制单元物理连通。
如上所述的具有信息防护功能的成像装置， 优选的是：
所述默认复位条件为开机重启信号或休眠唤醒信号； 或
所述成像装置的监控单元还包括计时子单元， 用于对所述信号监测子 单元监测到的输入电平信号进行计时， 并在预设计时值范围内未监测到输 入电平信号时， 产生默认复位条件。 本发明所提供的成像装置， 通过切换开关单元保持接口与接口控制单 元的物理连通或物理隔离， 减少了接口之间通过接口控制单元连通的可能 性， 因此能够避免用户的数据通过连通的接口泄漏， 因而减少了网络安全 |t刍 、
附图说明
图 1为现有技术中成像装置的结构示意图；
图 2为本发明实施例一提供的具有信息防护功能的成像装置的结构示意图； 图 3为本发明实施例二提供的具有信息防护功能的成像装置的结构示意图； 图 4为本发明实施例三提供的具有信息防护功能的成像装置的结构示意图。 具体实施方式 实施例一
图 2为本发明实施例一提供的具有信息防护功能的成像装置的结构示 意图， 该成像装置包括成像控制单元 1、 接口控制单元 2和至少两个接口 3 , 还包括切换开关单元 4 , 设置在接口 3和接口控制单元 2之间， 用于切 换接口 3与接口控制单元 1之间的物理连通或物理隔离。
本实施例中， 成像装置可以为任意类别， 例如常见的打印机、 扫描仪 等， 成像控制单元 1是成像装置中主要控制成像的芯片或电路， 其与计算 机交互传输数据， 控制成像。 接口控制单元 2和接口 3是遵循某种协议的 数据传输接口， 例如典型地为 USB接口， 则 USB接口控制单元即可釆用常 规的 USB控制芯片或电路， 用于将外部设备如计算机发送的数据传送给成 像控制单元， 以及将成像控制单元发出的数据传送给外部设备。
本实施例中设置了切换开关单元， 其能够实现接口与接口控制单元之 间的物理连通或物理隔离， 所谓物理连通或物理隔离， 即在接口和接口控 制单元之间是否存在电流信号， 在物理隔离状态下， 接口和接口控制单元 之间实现了电流信号传输通路的断开， 无法传输电流信号。 相比于软件形 式切换接口连接关系的技术， 物理连通或隔离的方式实现了电气断开， 而 软件方式通常只是在应用协议层面禁止数据的传输， 实际上电路仍保持连 接。 所以， 本发明实施例的技术方案能够通过物理隔离来保证接口之间没 有电气连接的可能， 杜绝了安全隐患。 切换开关单元优选是确保在同一时 间只能有一个指定接口与接口控制单元物理连通， 完成成像操作。 当然， 在实际应用中， 用户也可根据需要设计能同时保持物理连通的接口数量。 实现物理连通或物理隔离的切换开关单元， 可以釆用机械手段也可以 釆用电气手段。 例如， 切换开关单元可为机械开关， 如单刀双掷开关、 单 刀多掷开关等通过机械操作触发切换的开关， 或由多个开关件组合构成。 釆用电气手段的电路开关， 具体可选择半导体开关电路， 通过电信号来触 发切换。
实施例二
图 3为本发明实施例二提供的具有信息防护功能的成像装置， 本实施 例以上述实施例为基础， 进一步还包括开关触发单元 5 , 与切换开关单元
4相连， 用于控制切换开关单元 4的切换动作。
对于不同类型的切换开关单元， 开关触发单元可以釆用不同的结构。 例如， 若切换开关单元为单刀多掷开关等机械开关， 则开关触发单元可以 为直接控制开关切换控制的切换按钮。
若切换开关单元为半导体开关电路， 则开关触发单元优选可以为包括 控制输入端和控制输出端的触发电路， 控制输入端用于输入控制指令信 号， 控制输出端与切换开关单元相连， 触发电路将控制指令信号转换为控 制切换信号从控制输出端输出给切换开关单元。 触发电路可以由硬件芯片 来承载， 控制输入端可以为芯片引脚， 检测成像装置操作面板上按钮动作 导致的电平变化、 或软件的控制面板输入导致的电平变化等控制指令信 号、 或利用与成像装置相通信的外部设备输入的控制指令信号， 例如遥控 器、 计算机等。 控制指令信号经触发电路的处理从控制输出端输出， 进而 控制切换开关单元。 例如， 半导体开关电路的晶体管可以由高低电平信号 来控制导通或断开。
本实施例的技术方案， 可实现用户对使用成像装置的控制。 当一次成 像工作任务执行完成之后， 用户可以再次选择， 使另外被选通的计算机与 成像装置里的成像控制单元通信； 或不进行选择， 保持之前被选通的计算 机能够继续与上述的成像控制单元通信。
实施例三
图 4为本发明实施例三提供的具有信息防护功能的成像装置， 该成像 装置还包括监控单元 6 , 连接在开关触发单元 5和各接口 3之间， 该监控 单元 6具体包括信号监测子单元 61和切换触发子单元 62。 其中， 信号监 测子单元 61用于监测各接口 3处的输入电平信号和输出电平信号， 输入 电平信号是 PC需要进行成像操作时向接口 3输入的工作电平信号， 输出 电平信号是接口 3与接口控制单元 2已连通时发出的工作电平信号； 切换 触发子单元 62与信号监测子单元 61相连， 用于根据监测到输入电平信号 的接口 3 , 向开关触发单元 5输出控制指令信号， 以触发切换将产生电平 信号的接口 3与接口控制单元 2物理连通。
通过监控单元的设置， 能够使成像装置根据用户的成像需求自动完成 连通或隔离的切换控制， 无需用户手动选择。
优选是监控单元 6还包括： 优先级控制子单元 6 3 , 与信号监测子单元 6 1相连， 用于在监测到至少两个接口 3处产生输入电平信号时，根据预设 优先级策略选择一接口 3 , 并将所选择接口 3通知切换触发子单元 62。 优 先级策略可预先配置在监控单元 6中， 例如按照接口 3的序号顺序来为同 时发起成像请求的接口进行先后顺序的控制。 优先级策略的配置可以由用 户通过计算机配置， 或通过成像装置的控制面板进行配置， 也可以由成像 装置的生产商在出厂前即配置完成。
该监控单元 6还可进一步包括状态通报子单元 64 ,与信号监测子单元 6 1相连， 用于根据监测到的接口处的输出电平信号， 向各接口 3发送成像 装置的忙碌状态通知或空闲状态通知。 该技术方案能够进一步向用户通报 成像装置现在的工作状态。
监控单元的功能并不限于上述几项， 还可以根据需求来实现其他功 能。 诸如优先级控制子单元和状态通报子单元等功能单元可以单独设置， 也可以结合设置。 例如， 监控单元在监测到输入电平信号时， 还可以进一 步识别此时是否有其他接口正在产生输出电平信号， 如没有就产生控制指 令信号， 如有， 则不产生控制指令信号， 同时还可以发送忙碌状态通知， 通过相应接口传输给用户。 成像装置的忙碌状态通知或空闲状态通知可以 按照设定周期发送， 或在完成一次成像任务时发送， 或还可以在检测到忙 碌或空闲时就直接发送。
本发明实施例的具有信息防护功能的成像装置优选是还包括： 接口状 态指示单元， 用于指示各接口的连通状态。 具体是该接口状态指示单元与监 控单元中的信号监测子单元相连， 用于根据监测到的各接口的输入电平信 号或输出电平信号， 指示各接口的连通状态。
该接口状态指示单元可以为发光二极管 （LED ) , LED和 /或其颜色与 各接口的连通状态对应。
例如， LED可以以其颜色与各接口的连通状态对应， 即通过颜色来区 别各接口的连通状态。 如 LED亮绿色， 则代表第 1接口被连通； LED亮橙 色， 则代表第 2接口被连通； LED亮红色， 则代表第 3接口被连通等。 或 者， LED的数量可以为多个， 每个 LED对应一个或多个接口的连通状态。 当每个 LED唯一对应一个接口时， 通过 LED是否被点亮来确定接口是否被 连通， 如对应第 2接口的 LED亮， 则代表第 2接口被连通。 当每个 LED对 应多个接口时， 可以结合 LED的点亮情况和颜色来确定这些接口是否被连 通， 如一个 LED对应第 1接口和第 2接口， 则其亮绿色代表第 1接口被连 通， 亮红色代表第 2接口被连通。
所述接口状态指示单元也可以为显示器， 例如液晶显示器 （LCD ) 或 有机发光二极管 （0LED )显示器， 用于显示各接口的连通状态。 例如， 可 以直接在显示器上显示 "第 2接口被连通" 的字样等。
本发明实施例提供的成像装置， 优选是还包括一默认接口切换单元， 与所述开关触发单元相连， 用于在监测到默认复位条件时， 向所述开关触 发单元输出控制指令信号， 以触发切换将预设的默认接口与接口控制单元 物理连通。
该默认复位条件可以为开机重启信号或休眠唤醒信号等。 或者， 该成 像装置的监控单元还包括一计时子单元， 用于对所述信号监测子单元监测 到的输入电平信号进行计时， 并在预设计时值范围内未监测到输入电平信 号时， 产生默认复位条件。 从而控制开关触发单元将默认接口与接口控制 单元物理连通。
上述技术方案例如可适用于在打印机重新开机或者从休眠状态被唤 醒或者监控单元没有从任何接口监控到电平信号超过预定时长时， 控制开 关触发单元触发切换开关单元到默认接口， 例如第 1接口为默认接口。 上 述打印机重新开机或者从休眠状态被唤醒的状态可以通过监控单元或开 关触发单元有无收到启动信号 （上电信号） 来确定。
上述的默认接口及预定计时值可以是在成像装置出厂前预置好的， 也 可以由用户通过打印驱动、 显示器等打印机的控制设备进行设置。
当然， 在上述情况下， 在默认复位条件下， 开关触发单元也可以不做 任何操作， 即保持上次接口的连通状态。
本发明实施例所提供的成像装置中， 监控单元、 切换开关单元和 /或 开关触发单元可以集成在成像控制单元中， 或者也可以独立于该成像控制 单元设置。 监控单元、 切换开关单元和 /或开关触发单元既可以一体设置， 也可以分别独立设置。
本发明所提供的具有信息防护功能的成像装置， 使成像装置能够被多 台计算机共享使用， 且与其连接的多台计算机之间不会连通， 保证了用户 数据的安全。 最后应说明的是： 以上各实施例仅用以说明本发明的技术方案， 而非 对其限制； 尽管参照前述各实施例对本发明进行了详细的说明， 本领域的 普通技术人员应当理解： 其依然可以对前述各实施例所记载的技术方案进 行修改， 或者对其中部分或者全部技术特征进行等同替换； 而这些修改或 者替换， 并不使相应技术方案的本质脱离本发明各实施例技术方案的范 围。

Claims

权 利 要 求 书
1、 一种具有信息防护功能的成像装置， 包括成像控制单元、 接口控 制单元和至少两个接口， 其特征在于， 还包括：
切换开关单元， 设置在接口和接口控制单元之间， 用于切换接口与接 口控制单元之间的物理连通或物理隔离。
2、根据权利要求 1所述的具有信息防护功能的成像装置，其特征在于， 还包括： 开关触发单元， 与所述切换开关单元相连， 用于控制切换开关单 元的切换动作。
3、 根据权利要求 2所述的具有信息防护功能的成像装置， 其特征在 于： 所述切换开关单元为单刀多掷开关或半导体开关电路。
4、 根据权利要求 3所述的具有信息防护功能的成像装置， 其特征在 于： 所述开关触发单元为切换按钮。
5、 根据权利要求 2所述的具有信息防护功能的成像装置， 其特征在 于： 所述开关触发单元为包括控制输入端和控制输出端的触发电路， 所述 控制输入端用于输入控制指令信号， 所述控制输出端与切换开关单元相 连， 所述触发电路将控制指令信号转换为控制切换信号从控制输出端输出 给切换开关单元。
6、 根据权利要求 2所述的具有信息防护功能的成像装置， 其特征在 于： 所述接口为串行通信总线接口。
7、 根据权利要求 2-6任一所述的具有信息防护功能的成像装置， 其 特征在于， 还包括监控单元， 连接在开关触发单元和各接口之间， 所述监 控单元具体包括：
信号监测子单元， 用于监测各接口处的输入电平信号和输出电平信 号；
切换触发子单元， 用于根据监测到输入电平信号的接口， 向所述开关 触发单元输出控制指令信号， 以触发切换将产生所述电平信号的接口与接 口控制单元物理连通。
8、 根据权利要求 7所述的具有信息防护功能的成像装置， 其特征在 于， 所述监控单元还包括：
优先级控制子单元， 用于在监测到至少两个接口处产生输入电平信号 时， 根据预设优先级策略选择一接口， 并将所选择接口通知所述切换触发 子单元。
9、 根据权利要求 7或 8所述的具有信息防护功能的成像装置， 其特 征在于， 所述监控单元还包括：
状态通报子单元， 用于根据监测到的接口处的输出电平信号， 向各接 口发送成像装置的忙碌状态通知或空闲状态通知。
1 0、 根据权利要求 7-9任一所述的具有信息防护功能的成像装置， 其 特征在于： 所述监控单元、 切换开关单元和 /或开关触发单元集成在所述 成像控制单元中或独立于所述成像控制单元设置。
1 1、 根据权利要求 7-1 0任一所述的具有信息防护功能的成像装置， 其特征在于， 还包括：
接口状态指示单元， 用于根据监测到的各接口的输入电平信号或输出 电平信号， 指示各接口的连通状态。
12、 根据权利要求 1 1所述的具有信息防护功能的成像装置， 其特征在 于： 所述接口状态指示单元为发光二极管， 所述发光二极管和 /或其颜色 与各接口的连通状态对应。
1 3、 根据权利要求 1 1所述的具有信息防护功能的成像装置， 其特征在 于： 所述接口状态指示单元为显示器， 用于显示各接口的连通状态。
14、 根据权利要求 2-1 3任一所述的具有信息防护功能的成像装置， 其特征在于， 还包括：
默认接口切换单元， 与所述开关触发单元相连， 用于在监测到默认复 位条件时， 向所述开关触发单元输出控制指令信号， 以触发切换将预设的 默认接口与接口控制单元物理连通。
15、 根据权利要求 14 所述的具有信息防护功能的成像装置， 其特征 在于：
所述默认复位条件为开机重启信号或休眠唤醒信号； 或
所述成像装置的监控单元还包括计时子单元， 用于对所述信号监测子 单元监测到的输入电平信号进行计时， 并在预设计时值范围内未监测到输 入电平信号时， 产生默认复位条件。
PCT/CN2012/085941 2012-04-11 2012-12-05 具有信息防护功能的成像装置 WO2013152596A1 (zh)

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