WO2014000355A1 - 键盘安全保护装置 - Google Patents

键盘安全保护装置 Download PDF

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Publication number
WO2014000355A1
WO2014000355A1 PCT/CN2012/083802 CN2012083802W WO2014000355A1 WO 2014000355 A1 WO2014000355 A1 WO 2014000355A1 CN 2012083802 W CN2012083802 W CN 2012083802W WO 2014000355 A1 WO2014000355 A1 WO 2014000355A1
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WO
WIPO (PCT)
Prior art keywords
keyboard
contact
electrically connected
button
protective layer
Prior art date
Application number
PCT/CN2012/083802
Other languages
English (en)
French (fr)
Inventor
朱波
史书宪
王钰卓
Original Assignee
百富计算机技术（深圳）有限公司
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Application filed by 百富计算机技术（深圳）有限公司 filed Critical 百富计算机技术（深圳）有限公司
Priority to US13/983,894 priority Critical patent/US9152239B2/en
Publication of WO2014000355A1 publication Critical patent/WO2014000355A1/zh

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    • 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
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/02—Input arrangements using manually operated switches, e.g. using keyboards or dials
    • G06F3/0202—Constructional details or processes of manufacture of the input device
    • G06F3/0219—Special purpose keyboards
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
    • H01H13/702—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches
    • H01H13/704—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches characterised by the layers, e.g. by their material or structure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2239/00—Miscellaneous
    • H01H2239/002—Conductive track to monitor integrity
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2239/00—Miscellaneous
    • H01H2239/032—Anti-tamper
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2239/00—Miscellaneous
    • H01H2239/038—Anti-vandalism

Definitions

  • the invention belongs to the field of security protection of electronic devices, and more particularly to a keyboard security protection device for protecting a keyboard area of a POS machine from attack.
  • keyboards as input data information parts, some high-sensitivity data information input or stored, such as bank information, passwords, registration codes, etc.
  • bank information e.g., POS machines, PIN pads, ATM machines, etc.
  • passwords e.g., passwords, registration codes, etc.
  • Common keyboard protections are generally dedicated to the protection of the entire device, especially the protection against detachment of the housing.
  • the tamper-evident contact is arranged on the keyboard PCB, and the conductive adhesive is pressed on the tamper-evident contact through the whole casing to make the tamper detecting circuit turn on. If the attacker attempts to uncover the entire casing and attack the inside of the keyboard, the conductive adhesive and the tamper-evident contact are loosened, causing the tamper-detection circuit to open, thereby triggering the relevant security mechanism to erase the highly sensitive data information stored therein. .
  • this protection method is not precise enough.
  • the attacker can attack the golden finger area of the keyboard PCB board to achieve high sensitivity by attacking the hole and piercing the shell without touching the tamper-evident contact. Data information.
  • Another protection scheme is to protect the keyboard key area by using a keyboard protection board, as described in the Chinese patent "ZL201020297100.2", the keyboard protection device includes a keyboard button, a silicone keyboard, a keyboard PCB board, and a golden finger on the keyboard PCB board. Covering and pasting a keyboard protection board, the contacts on the keyboard protection board are electrically connected, and the keyboard protection board is made of a flexible film as a base material, and the golden finger of the keyboard PCB board is protected by printing a conductive MESH protection circuit, and the keyboard is passed through the keyboard.
  • the tear-proof layer on the protection board protects the circumference of the gold finger.
  • the keyboard protection board protects the front side of the gold finger area and its circumference. When the attacker punches or uncovers the keyboard protection board, the relevant security mechanism is triggered. To erase highly sensitive data information stored internally.
  • the printed conductive MESH protection circuit for frontal protection there must be gaps or insulation isolation between the two traces of the printed circuit for the circuit to conduct, which allows the attacker to find the vulnerability to attack and detect.
  • the protection circuit is directly printed on the flexible film, and the pressure of the keyboard button pressing directly acts on the flexible film and the protection circuit, and frequent or improper operation is easy to cause The trace of the protection circuit is broken, resulting in a decrease in the service life of the keyboard protection board.
  • the object of the present invention is to overcome the above deficiencies of the prior art and to provide a keyboard security protection device with more comprehensive protection and longer service life.
  • a keyboard security protection device includes a protective layer, a pot piece, a keyboard PCB board, the keyboard PCB board is provided with a button gold finger and a security processor, and the protection layer is covered by a PVDF film and covers the PVDF
  • the first and second silver pastes are formed on the surface of the film, and the first and second silver paste surfaces are provided with first and second film layers, and the first and second silver pastes and the button gold
  • the fingers are electrically connected and electrically connected to the security processor through the keyboard PCB to form a security detection circuit.
  • a first contact is disposed on the first silver paste
  • a second contact and a third contact are disposed on the second silver paste
  • the first contact passes through the PVDF film and the
  • the second contact is electrically connected
  • an isolation groove is disposed between the second silver paste and the second contact.
  • the second contact and the third contact are electrically connected to the button gold finger, and the button gold finger is provided with conductive particles for facilitating electrical connection with the second contact and the third contact.
  • the second film layer and the pot piece are respectively provided with openings for facilitating electrical connection between the second contact and the third contact.
  • the height of the conductive particles is less than the height of the pot.
  • the protective layer is provided with a silicone button, and the bottom of the silicone button is provided with a pressing protrusion corresponding to the second and third contacts on the protective layer.
  • the keyboard security protection device of the present invention comprises a protective layer, a pot piece, a keyboard PCB board and a security processor, and the protective layer covers and is electrically connected to the button gold finger provided on the keyboard PCB board, and the first layer of the protection layer
  • the second silver paste is electrically connected with the button gold finger and the safety processor to form a covered safety detecting circuit to protect the button gold finger area. Therefore, the outside world cannot detect or monitor the internal circuit of the button gold finger through the protection device, thereby Get highly sensitive data information in the button area.
  • the keyboard security protection device further comprises a silicone button, and the second and third contacts on the bottom of the corresponding layer of the silicone button are provided with pressure protrusions, and the pressure protrusions ensure the second and third contacts.
  • the electrical connection between the point and the conductive particle is turned on, so that the electrical connection structure is more stable and the structure is simple; when the attacker illegally disassembles the silicone button, the electrical connection between the second and third contacts and the conductive particle is disconnected, and the safety detection is performed.
  • the circuit does not detect the input/output of the signal, thereby triggering the safety mechanism to erase the highly sensitive data information in the button area. Therefore, the structure has a safety effect of tampering.
  • the protective layer is based on a PVDF film, which is soft but without losing the mechanical strength and toughness, so that the physical protection and service life of the protective layer are greatly increased; the first and second silver on the protective layer
  • the slurry coating can prevent the problem of the breakage of the protection circuit caused by frequent or improper operation, further increasing the service life of the protective layer; and the insulating, dustproof and waterproof film layers on the outer surface are not further improved.
  • the life of the protective layer is also increased, and the use of the protective layer is also added.
  • FIG. 1 is a schematic exploded view showing the structure of a keyboard security protection device according to the present invention
  • FIG. 2 is a cross-sectional view showing the structure of a protective layer of the present invention
  • FIG. 3 is a schematic structural view of a first film layer of the present invention.
  • Figure 4 is a schematic view showing the structure of a first silver paste of the present invention.
  • Figure 5 is a schematic view showing the structure of a PVDF film of the present invention.
  • Figure 6 is a schematic view showing the structure of a second silver paste of the present invention.
  • Figure 7 is a schematic view showing the structure of a second film layer of the present invention.
  • FIG. 8 is a cross-sectional structural view of a keyboard security protection device according to the present invention.
  • FIG. 9 is a schematic structural view of a keyboard PCB board according to the present invention.
  • Figure 10 is an enlarged schematic view showing the structure of the A-A of the present invention.
  • Figure 11 is a schematic view showing the structure of the pot piece of the present invention.
  • the keyboard security protection device comprises a protective layer 1, a pot piece 2 and a keyboard PCB board 3.
  • the keyboard PCB board 3 is provided with a button gold finger 4 and a security processor 5, and the protective layer 1
  • the PVDF film 11 is composed of a PVDF film 11 and first and second silver pastes 12 and 13 covering the surface of the PVDF film 11, and the PVDF film 11 is soft without losing the characteristics of mechanical strength and toughness, so that the physical layer of the protective layer 1
  • the protection and the service life are greatly increased; the coating of the first and second silver pastes 12 and 13 on the protective layer 1 prevents the problem of the breakage of the protection circuit due to frequent or improper operation, and further increases the protective layer 1
  • the first and second silver pastes 12 and 13 are electrically connected to the button gold finger 4, and are electrically connected to the security processor 5 through the keyboard PCB board 3 to form a safety detecting circuit.
  • the first and second silver pastes 12 and 13 are formed.
  • the safety detection circuit is two circuit loops, and the safety processor 5 is electrically connected to the first silver paste 12 by the button gold finger 4 to form a first signal detection circuit; the safety processor 5 passes the button gold finger 4 and the second silver paste.
  • the first silver paste 12 is provided with a first contact 120
  • the second silver paste 13 is provided with a second contact 130 and a third contact 140.
  • the first contact 120 passes through the PVDF film 11.
  • the second contact 130 is electrically connected to the second silver paste 13 and the second contact 130.
  • the first silver paste 12 and the second silver paste 13 are not electrically connected.
  • Two signal detection loops are formed as two signal layers of the security processor 5.
  • the second contact 130 and the third contact 140 are electrically connected to the button gold finger 4, and the button gold finger 4 serves as an input or stores a highly sensitive data information portion, and must be electrically connected to the security processor 5; 4 is provided with conductive particles 40 which are electrically connected to the second contact 130 and the third contact 140.
  • the second contact 130 and the third contact 140 are directly electrically connected to the button gold finger 4, but are protected by the protection.
  • a pot piece 2 is disposed between the layer 1 and the keyboard PCB board 3.
  • the protective layer 1 is electrically connected to the button gold finger 4, and the pressing pressure is increased to deform the protective layer 1 downward, so the conductive particle 40 is added. It is possible to prevent the protective layer 1 from being damaged due to excessive deformation of the pressing, resulting in a decrease in service life.
  • the second film layer 15 and the pot piece 2 are respectively provided with an opening 7 for facilitating electrical connection between the second contact 130 and the third contact 140, so as to facilitate the second contact 130 and the third contact 140 and the button
  • the shortest distance of the gold finger 4 is connected, and the second contact 130 and the third contact 140 can be placed in the projection of the protective layer 1 to be protected and safer.
  • the protective layer 1 is provided with a silicone button 6 .
  • the bottom of the silicone button 6 is provided with a pressing protrusion 60 corresponding to the second contact 130 and the third contact 140 of the protective layer 1 .
  • the protective layer 1 is disposed to ensure that the second contact 130 and the third contact 140 are electrically connected to the button gold finger 4 to make the electrical connection structure more stable and simple in structure; and the height of the conductive particle 40 is less than
  • the height of the pot piece 2 is designed to match the pressing protrusion 60 of the silicone button 6, so that the structure has a safety effect of tampering.
  • the pressure of the pressing protrusion 60 on the protective layer 1 disappears, and the electrical connection between the second and third contacts 130, 140 and the conductive particle 40 is broken, and the safety processor 5 issues.
  • the input/output detection signal is broken, triggering a safety mechanism to erase highly sensitive data information within the keypad.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Push-Button Switches (AREA)
  • Input From Keyboards Or The Like (AREA)
  • Contacts (AREA)

Abstract

本发明适用于电子设备的安全保护领域，提供一种键盘安全保护装置保护POS机键盘区域免受攻击。该键盘安全保护装置包括保护层、锅仔片、键盘PCB板，键盘PCB板上设有按键金手指和安全处理器，保护层由一层PVDF膜和覆盖于PVDF膜表面的第一、第二银浆体组成，且第一、第二银浆体表面设有第一、第二薄膜层，第一、第二银浆体与按键金手指电连接，并通过键盘PCB板与安全处理器电连接形成安全检测电路。本发明旨在解决电子电路的敏感数据信息被盗取的问题，并提供保护全面、使用寿命更长的键盘安全保护装置。

Description

键盘安全保护装置 技术领域
本发明属于电子设备的安全保护领域，更具体地说，涉及一种保护POS机键盘区域免受攻击的键盘安全保护装置。
 背景技术
现今，金融领域内的POS机、密码键盘、ATM机等电子设备，键盘作为输入数据信息部分，其输入或存储的一些高敏感性数据信息，如银行信息、密码、注册码等经常在未经授权许可的情况下被攻击盗用，因此，对这些数据的保护也受到越来越高的重视，各种形式的键盘保护装置和方法不断出现。
常见的键盘保护一般都致力于对设备整体的保护，尤其是对外壳防拆卸的保护。通常是在键盘PCB板上设置防揭触点，导电胶通过整机外壳压紧在防揭触点上，使防揭检测电路导通。若攻击者试图揭开整机外壳进行攻击键盘内部时，导电胶便与防揭触点松开，引起防揭检测电路断路，从而触发相关安全机制以擦除其内部存储的高敏感性数据信息。但这种保护方法不够精细，攻击者可以在不触及防揭触点的情况下，通过打孔、刺穿外壳等攻击方式，对键盘PCB板上的按键金手指区域进行攻击以取得高敏感性数据信息。还有一种保护方案是利用一键盘保护板对键盘按键区域进行保护，如中国专利“ZL201020297100.2”所述，该键盘保护装置包括键盘按键、硅胶、键盘PCB板，在键盘PCB板的金手指上覆盖并粘贴一键盘保护板，由键盘保护板上的触点电连导通，键盘保护板以柔性薄膜为基材，通过印刷导电MESH保护电路保护键盘PCB板上的金手指，并通过键盘保护板上的防撕层保护金手指的周圈，该键盘保护板针对金手指区域的正面及其周圈进行防护，当攻击者打孔或揭开键盘保护板时，均会触发相关安全机制以擦除其内部存储的高敏感性数据信息。然而，进行正面防护的印刷导电MESH保护电路，其印刷的两两走线之间为了电路的导通，之间必定存在着缝隙或绝缘物进行隔离，这就让攻击者找到漏洞进行攻击，探测窃取键盘金手指内存储的高敏感性数据信息；另外，该保护电路是直接印刷在柔性薄膜上的，键盘按键按压的压力直接作用在柔性薄膜和保护电路上，频繁或不当的操作均易造成保护电路的走线断裂，从而造成键盘保护板的使用寿命降低。
 技术问题
本发明的目的在于克服上述现有技术之不足，提供一种保护更全面、使用寿命更长的键盘安全保护装置。
 技术解决方案
为了实现上述发明目的，本发明采用了以下技术方案：
一种键盘安全保护装置，包括保护层、锅仔片、键盘PCB板，所述键盘PCB板上设有按键金手指和安全处理器，所述保护层由一层PVDF膜和覆盖于所述PVDF膜表面的第一、第二银浆体组成，且所述第一、第二银浆体表面设有第一、第二薄膜层，所述第一、第二银浆体与所述按键金手指电连接，并通过所述键盘PCB板与所述安全处理器电连接形成安全检测电路。
所述第一银浆体上设有第一触点，所述第二银浆体上设有第二触点、第三触点，所述第一触点穿过所述PVDF膜与所述第二触点电连接，所述第二银浆体与所述第二触点之间设有隔离槽。
所述第二触点、第三触点与所述按键金手指电连接，所述按键金手指上设有利于与所述第二触点、第三触点电连接的导电粒。
所述第二薄膜层与所述锅仔片上均设有利于所述第二触点、第三触点进行电连接的开孔。
所述导电粒的高度小于所述锅仔片的高度。
所述保护层上设有一硅胶按键，所述硅胶按键底部对应所述保护层上的第二、第三触点处设有加压凸起。
 有益效果
本发明采用上述技术方案后相对于现有技术具有如下优点:
第一，本发明键盘安全保护装置包括保护层、锅仔片、键盘PCB板和安全处理器，保护层覆盖在键盘PCB板设有的按键金手指上并与之电连接，保护层的第一、第二银浆体与按键金手指、安全处理器电连接，形成覆盖式的安全检测电路将按键金手指区域保护起来，因此，外界无法透过保护装置探测或监测按键金手指内部电路，从而获得按键区域内的高敏感性数据信息。
第二，该键盘安全保护装置还包括一硅胶按键，硅胶按键底部对应保护层上的第二、第三触点处设有加压凸起，该加压凸起可确保第二、第三触点与导电粒的电连接导通，使其电连接结构更加稳定，且结构简单；当攻击者非法拆开硅胶按键时，第二、第三触点与导电粒的电连接断开，安全检测电路检测不到信号的输入/输出，从而触发安全机制擦除按键区域内的高敏感性数据信息，因此，该结构又起到了防拆的安全效果。
第三，保护层以PVDF膜为基材，该PVDF膜柔软但却不失机械强度与坚韧度的特性，使得保护层的物理防护以及使用寿命大大增加；保护层上的第一、第二银浆体涂层又可防止因频繁或不当的操作造成保护电路的走线断裂等问题，进一步增加了保护层的使用寿命；而外表面设有的绝缘、防尘、防水薄膜层，不仅进一步提升了保护层的使用寿命，而且还增加了保护层的使用功能。
 附图说明
图1为本发明键盘安全保护装置结构分解示意图；
图2为本发明保护层结构剖视示意图；
图3为本发明第一薄膜层结构示意图；
图4为本发明第一银浆体结构示意图；
图5为本发明PVDF膜结构示意图；
图6为本发明第二银浆体结构示意图；
图7为本发明第二薄膜层结构示意图；
图8为本发明键盘安全保护装置剖视结构示意图；
图9为本发明键盘PCB板结构示意图；
图10为本发明A-A处结构放大示意图；
图11为本发明锅仔片结构示意图。
1保护层；2锅仔片；3键盘PCB板；4按键金手指；5安全处理器； 6硅胶按键；7开孔；11PVDF膜；12第一银浆体；13第二银浆体；14第一薄膜层；15第二薄膜层；120第一触点；130第二触点；140第三触点；150隔离槽；40导电粒；60加压凸起。
 本发明的实施方式
为了使本发明的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，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。
参见图1和图2，键盘安全保护装置包括保护层1、锅仔片2和键盘PCB板3，所述键盘PCB板3上设有按键金手指4和安全处理器5，所述保护层1由一层PVDF膜11和覆盖于PVDF膜11表面的第一、第二银浆体12、13组成，其PVDF膜11柔软但又不失机械强度与坚韧度的特性，使得保护层1的物理防护以及使用寿命大大增加；保护层1上的第一、第二银浆体12、13涂层又可防止因频繁或不当的操作造成保护电路的走线断裂等问题，进一步增加了保护层1的使用寿命；而外表面设有的绝缘、防尘、防水的第一、第二薄膜层14、15，不仅进一步提升了保护层1的使用寿命，而且还增加了保护层1的防护功能。所述第一、第二银浆体12、13与按键金手指4电连接，并通过键盘PCB板3与安全处理器5电连接形成安全检测电路，第一、第二银浆体12、13作为安全机制的信号检测层或监测层。该安全检测电路为两个电路回路，安全处理器5通过按键金手指4与第一银浆体12电连接形成第一信号检测回路；安全处理器5通过按键金手指4与第二银浆体13电连接形成第二信号检测回路，当攻击者破坏或刺穿保护层1时，PVDF膜11被破坏，第一、第二银浆体12、13导通，致使第一信号检测回路和第二信号检测回路出现短路，从而触发安全处理器5的安全机制以擦除或销毁按键区内的高敏感性数据信息。
所述第一银浆体12上设有第一触点120，所述第二银浆体13上设有第二触点130、第三触点140，第一触点120穿过PVDF膜11与第二触点130电连接，第二银浆体13与第二触点130之间设有隔离槽150，使第一银浆体12与第二银浆体13之间不进行电连接，作为安全处理器5的两个信号层形成两个信号检测回路。
所述第二触点130、第三触点140与按键金手指4电连接，按键金手指4作为输入或存储高敏感性数据信息部分，必须与安全处理器5电连接；所述按键金手指4上设有利于与第二触点130、第三触点140电连接的导电粒40，该第二触点130、第三触点140本身可直接与按键金手指4电连接，但因保护层1与键盘PCB板3之间设有锅仔片2，保护层1与按键金手指4电连导通，就需要按压压力增大，使保护层1向下变形，故增设该导电粒40可防止保护层1因按压变形过大而损坏，导致使用寿命降低。
所述第二薄膜层15与锅仔片2上均设有利于第二触点130、第三触点140进行电连接的开孔7，便于第二触点130、第三触点140与按键金手指4的最短距离连接，且可使第二触点130、第三触点140在保护层1的投影内，便于被保护及更安全。
所述保护层1上设有一硅胶按键6，该硅胶按键6底部对应保护层1上的第二触点130、第三触点140处设有加压凸起60，该加压凸起60用于顶住保护层1，确保第二触点130、第三触点140与按键金手指4电连接导通，使其电连接结构更加稳定，且结构简单；而所述导电粒40的高度小于锅仔片2的高度设计，配合硅胶按键6的加压凸起60，使该结构又起到防拆的安全效果。当攻击者非法拆开硅胶按键6时，加压凸起60对保护层1的压力作用消失，第二、第三触点130、140与导电粒40的电连接断开，安全处理器5发出的输入/输出检测信号出现断路，从而触发安全机制以擦除按键区内的高敏感性数据信息。
以上所述仅为本发明的较佳实施例而已，并不用以限制本发明，凡在本发明的精神和原则之内所作的任何修改、等同替换和改进等，均应包含在本发明的保护范围之内。

Claims (6)

  1. 一种键盘安全保护装置，包括保护层（1）、锅仔片（2）、键盘PCB板（3），所述键盘PCB板（3）上设有按键金手指（4）和安全处理器（5），其特征在于：所述保护层（1）由一层PVDF膜（11）和覆盖于所述PVDF膜（11）表面的第一、第二银浆体（12、13）组成，且所述第一、第二银浆体（12、13）表面设有第一、第二薄膜层（14、15），所述第一、第二银浆体（12、13）与所述按键金手指（4）电连接，并通过所述键盘PCB板（3）与所述安全处理器（5）电连接形成安全检测电路。
  2. 根据权利要求1所述的键盘安全保护装置，其特征在于：所述第一银浆体（12）上设有第一触点（120），所述第二银浆体（13）上设有第二触点（130）、第三触点（140），所述第一触点（120）穿过所述PVDF膜（11）与所述第二触点（130）电连接，所述第二银浆体（13）与所述第二触点（130）之间设有隔离槽（150）。
  3. 根据权利要求2所述的键盘安全保护装置，其特征在于：所述第二触点（130）、第三触点（140）与所述按键金手指（4）电连接，所述按键金手指（4）上设有利于与所述第二触点（130）、第三触点（140）电连接的导电粒（40）。
  4. 根据权利要求3所述的键盘安全保护装置，其特征在于：所述第二薄膜层（15）与所述锅仔片（2）上均设有利于所述第二触点（130）、第三触点（140）进行电连接的开孔（7）。
  5. 根据权利要求4所述的键盘安全保护装置，其特征在于：所述导电粒（40）的高度小于所述锅仔片（2）的高度。
  6. 根据权利要求5中任意一项所述的键盘安全保护装置，其特征在于：所述保护层（1）上设有一硅胶按键（6），所述硅胶按键（6）底部对应所述保护层（1）上的第二、第三触点（130、140）处设有加压凸起（60）。
PCT/CN2012/083802 2012-06-29 2012-10-31 键盘安全保护装置 WO2014000355A1 (zh)

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