WO2017155127A1 - Terminal mobile comportant un clavier de sécurité - Google Patents

Terminal mobile comportant un clavier de sécurité Download PDF

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Publication number
WO2017155127A1
WO2017155127A1 PCT/KR2016/002259 KR2016002259W WO2017155127A1 WO 2017155127 A1 WO2017155127 A1 WO 2017155127A1 KR 2016002259 W KR2016002259 W KR 2016002259W WO 2017155127 A1 WO2017155127 A1 WO 2017155127A1
Authority
WO
WIPO (PCT)
Prior art keywords
keypad
circuit board
printed circuit
security
touch
Prior art date
Application number
PCT/KR2016/002259
Other languages
English (en)
Korean (ko)
Inventor
이장원
홍문규
박찬웅
Original Assignee
주식회사 블루버드
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.)
Filing date
Publication date
Application filed by 주식회사 블루버드 filed Critical 주식회사 블루버드
Priority to PCT/KR2016/002259 priority Critical patent/WO2017155127A1/fr
Publication of WO2017155127A1 publication Critical patent/WO2017155127A1/fr

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Classifications

    • 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
    • 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
    • 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
    • H01H13/705—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 construction, mounting or arrangement of operating parts, e.g. push-buttons or keys
    • H01H13/7065—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 construction, mounting or arrangement of operating parts, e.g. push-buttons or keys characterised by the mechanism between keys and layered keyboards

Definitions

  • the present invention relates to a mobile terminal, and more particularly, to a mobile terminal having a secure keypad that is difficult to tamper.
  • a mobile terminal is a terminal that can be used freely regardless of place. It is a payment terminal used for credit cards, a mobile communication terminal such as a mobile phone, and a personal digital assistant (PDA). Assistant) is representative. Therefore, the term 'mobile terminal' used herein includes all of these terms, but for the convenience of description, the following description will be limited to the payment terminal.
  • PDA personal digital assistant
  • the payment terminal stores or processes a lot of important data (for example, personal information). Therefore, it is essential for payment terminals to apply a tampering detection mechanism that can detect hardware or software tampering behaviors that hack these important data.
  • a keypad is a kind of switch device for generating a signal or performing various additional functions through a user's key manipulation.
  • a plurality of keys including numbers or letters are printed, and the plurality of keys are inserted into a key hole provided in the front panel portion, and a part of the body protrudes out of the front panel portion.
  • the key inserted into the keyhole has a dome switch structure, which is a type of push switch.
  • a printed circuit board is installed on the bottom of the keypad, and the dome switch of the front panel portion is elastically deformed by pressing a key to generate a signal by contacting a contact provided on the printed circuit board.
  • the user operates various keypads such as credit card approval and password input by operating the keypad of the payment terminal.
  • a small storage device is connected to the signal line by drilling a small hole upwards near the position where the signal line for transmitting the lower key input signal of the printed circuit board installed on the bottom of the front panel of the keypad is located.
  • the application of the touch keypad can solve the problem of security, but it is inconvenient because the user needs attention and there is no click feeling due to fingerprint generation, in particular, it is difficult to use the disabled.
  • an object of the present invention is to provide a mobile terminal having a security keypad capable of maintaining a click feeling while improving security compared to the related art.
  • the keypad body is provided with a plurality of key buttons; A conductive layer provided on the key button; And a touch keypad provided below the keypad body, the touch keypad electrically interacting with the conductive layer according to a position of the key button elastically deformed by a pressing operation.
  • a terminal may be provided.
  • the plurality of key buttons may be provided to protrude from the keypad body.
  • the conductive layer may be provided on a bottom surface of the key button.
  • the display device may further include a substrate unit disposed below the keypad body and having a first printed circuit board (PCB).
  • the touch keypad may be provided on the first printed circuit board (PCB).
  • the touch keypad is embedded in the first printed circuit board, and the conductive layer is in contact with the first printed circuit board when the key button is elastically deformed by pressing, but maintains a constant distance from the touch keypad. Can be.
  • a touch control unit electrically connected to the touch keypad and configured to generate an operation signal of the key button by detecting a change in capacitance between the conductive layer and the touch keypad when elastically deformed by the pressing operation of the key button. It may include.
  • the touch control unit may be installed on the first printed circuit board.
  • the touch controller may be disposed on a bottom surface of the first printed circuit board.
  • the substrate unit may include a second printed circuit board disposed under the first printed circuit board and electrically connected to the first printed circuit board; And between the first printed circuit board and the second printed circuit board, and connected to the first printed circuit board and the second printed circuit board, between the first printed circuit board and the second printed circuit board. It may further include a security wall forming a security shielding space.
  • the touch control unit may be disposed in the security shielding space.
  • a case unit having an upper case and a lower case, which are mutually assembled and disassembled, wherein the substrate unit is accommodated between the upper case and the lower case, and the keypad body may be coupled to the upper case.
  • the keypad body includes a keypad body to which the key button is coupled, and the key button includes: a button leg connected to the keypad body; And a button head coupled to the button leg, wherein the conductive layer may be provided on the button head.
  • Embodiments of the present invention by having a touch keypad in electrical interaction with the conductive layer provided on the key button according to the position of the key button elastically deformed by the pressing operation, the user can use a touch keypad difficult to hack The user can feel the click feeling by pressing the key button, thereby allowing the elderly or the visually impaired with a bad vision to recognize whether the key button is pressed by the click feeling rather than the visual.
  • FIG. 1 is an exploded perspective view showing a mobile terminal having a security keypad according to an embodiment of the present invention.
  • FIG. 2 is an exploded perspective view illustrating a state in which the substrate unit is coupled to FIG. 1.
  • FIG. 3 is a view illustrating a keypad body, a conductive layer, and a touch keypad of FIG. 1.
  • FIG. 4 is a diagram illustrating a state in which a key button is pressed in FIG. 3.
  • the mobile terminal used hereinafter is a mobile terminal for convenience of terminology or explanation, including a payment terminal used for credit cards, mobile communication terminals such as mobile phones, and personal digital assistants (PDAs), which are called personal portable terminals. Display on the terminal.
  • PDAs personal digital assistants
  • FIG. 1 is an exploded perspective view showing a mobile terminal having a security keypad according to an embodiment of the present invention
  • Figure 2 is an exploded perspective view showing a state in which the substrate unit is coupled to Figure 1
  • Figure 3 is The keypad body, the conductive layer, and the touch keypad are illustrated.
  • FIG. 4 is a diagram illustrating a state in which a key button is pressed in FIG. 3.
  • the mobile terminal As shown in Figures 1 to 4, the mobile terminal according to an embodiment of the present invention, the case unit 110, which can be assembled and disassembled, and the security keypad 131, 133, 134 connected to the case unit 110 And a substrate unit 120 disposed inside the case unit 110 and electrically connected to the security keypads 131, 133, and 134 to receive data from the security keypads 131, 133, and 134.
  • the case unit 110 includes an upper case 111 and a lower case 112, and the keypad body 131a described below is coupled to the upper case 111.
  • the case unit 110 will be described later for convenience of description.
  • the substrate unit 120 includes a first printed circuit board 121 connected to the touch keypad 134 which will be described later.
  • the substrate unit 120 will be described later for convenience of description.
  • the security keypad 131, 133, 134 includes a keypad body 131 provided with a plurality of key buttons 132, a conductive layer 133 provided on the key button 132, and a lower portion of the keypad body 131. And a touch keypad 134 electrically interacting with the conductive layer 133 according to the position of the key button 132 elastically deformed by the pressing operation.
  • the keypad body 131 is provided with a plurality of key buttons 132.
  • the plurality of key buttons 132 protrude from the keypad body 131 for convenience of use of the user.
  • the key button 132 is provided with a conductive layer 133. Specifically, the conductive layer 133 is disposed on the lower surface of the button head 132b described later.
  • the keypad body 131 includes a keypad body 131a to which a key button 132 is coupled.
  • the keypad body 131a is coupled to the upper case 111.
  • the key button 132 is supported by the keypad body 131a.
  • the key button 132 includes a button leg 132a connected to the keypad body 131a and a button head 132b coupled to the button leg 132a.
  • the button head 132b is a portion that the user presses for data input and is moved downward by the user's pressing operation.
  • the lower surface of the button head 132b is provided with a conductive layer 133, and the conductive layer 133 provided on the lower surface of the button head 132b is provided with the button head 132b when the button head 132b moves downward. Move and electrically interact with the touch keypad 134.
  • the button leg 132a connects the button head 132b and the keypad body 131a, and moves the button head 132b to its original position when the user presses the button head 132b.
  • the button leg 132a is made of an elastic material and elastically deforms as shown in FIG. 4 when the user presses the button head 132b to elastically bias the button head 132b upward.
  • the button head 132b When the pressing force of the user who presses the button head 132b is released, the button head 132b is pushed upward through the elastic force of the button leg 132a, so that the button head 132b is returned to the original position shown in FIG. Is moved.
  • the button leg 132a is elastically deformed so that the user may feel a click when pressing the button head 132b.
  • the touch keypad 134 is provided below the keypad body 131 and electrically interacts with the conductive layer 133 according to the position of the button head 132b.
  • a capacitive touch keypad 134 is used as the touch keypad 134 used in the present embodiment.
  • the capacitive touch keypad 134 is a method of recognizing a touch by recognizing a change in capacitance generated when a body of a person such as a human finger touches or approaches the touch keypad 134.
  • the touch keypad 134 senses that the user presses the button head 132b by detecting a change in capacitance when the conductive layer 133 provided on the button head 132b contacts or approaches the touch keypad 134. Be aware.
  • the touch keypad 134 has an advantage that is difficult to hack compared to the conventional dome switch keypad (not shown).
  • Conventional dome switch keypad is a method in which a dome switch connects or disconnects two contacts provided on a printed circuit board to receive information from a user. The two contacts eventually serve as two signal lines, and a hacker uses these two contacts. You can hack keyed data by detecting this connection and disconnection.
  • the touch keypad 134 of the present embodiment uses only one signal line, the touch keypad 134 may effectively cope with a hacking method of detecting that two contacts are connected and disconnected.
  • the touch keypad 134 has a problem that fingerprints are left on the touch keypad 134 and there is no click feeling, and thus it is difficult to use the elderly or the visually impaired with poor eyesight, but the mobile terminal is provided with the security keypad according to the present embodiment. Solves this problem through the keypad body 131 described above.
  • the touch keypad 134 is signaled through the conductive layer 133 provided on the lower surface of the button head 132b, the user's finger does not need to be in contact with the touch keypad 134. It does not remain on the touch keypad 134.
  • the user can feel a click through the button leg 132a which is elastically deformed by the user's pressing force when the user presses the button head 132b.
  • the mobile terminal having the security keypad according to the present embodiment has an advantage of giving the user a feeling of clicking the key button 132 while improving security than before.
  • elderly people with low vision or blind people can recognize whether the key button 132 is pressed by a sense of click rather than a visual method.
  • the touch keypad 134 is provided on the first printed circuit board 121 of the substrate unit 120.
  • the touch keypad 134 is embedded in the first printed circuit board 121. Since the change in capacitance occurs not only in direct contact but also within a predetermined distance, the security can be further improved by embedding in the first printed circuit board 121 without exposing the touch keypad 134.
  • the button head 132b since the touch keypad 134 is embedded in the first printed circuit board 121, the button head 132b does not directly contact the touch keypad 134, so that the touch keypad 134 is in contact with the button head 132b. Can be prevented from being damaged.
  • the button head 132b When the touch keypad 134 is embedded in the first printed circuit board 121, the button head 132b is pressed by the user so that the conductive layer 133 contacts the first printed circuit board 121. Layer 133 may maintain a constant spacing with respect to touch keypad 134. Since the button head 132b pressed by the user maintains a predetermined distance from the touch keypad 134, there is an advantage in that the sensitivity of the touch keypad 134 can be easily adjusted.
  • the mobile terminal having a security keypad the conductive layer 133 and the touch keypad 134 is electrically connected to the touch keypad 134 and when elastically deformed by the pressing operation of the key button 132.
  • the touch controller 140 may further include a touch controller 140 that detects a change in capacitance between and generates an operation signal of the key button 132.
  • the touch controller 140 is electrically connected to the touch keypad 134 through the conductive wire D.
  • the touch controller 140 detects a change in capacitance between the touch keypad 134 when the conductive layer 133 provided on the bottom surface of the button head 132b moves along the movement of the button head 132b, thereby allowing a key button ( 132 generates an operation signal.
  • the touch controller 140 is installed on the first printed circuit board 121.
  • the touch controller 140 is disposed on the bottom surface of the first printed circuit board 121 so that a hacker cannot easily access the touch controller 140 in the direction of the keypad body 131.
  • the case unit 110 includes an upper case 111 and a lower case 112, and the keypad body 131 is coupled to the upper case 111.
  • the upper case 111 and the lower case 112 may be coupled through a fastening member N such as a screw or a bolt.
  • the lower case 112 is formed with an opening into which a screw or bolt can be inserted, and the upper case 111 is provided with a fastening portion (not shown) to which a fastening member N such as a screw or bolt can be fastened.
  • the fastening member N inserted into the opening of the lower case 112 may pass through the upper case 111 from the lower case 112 and may be fastened to a fastening part (not shown) formed in the upper case 111.
  • a fastening part (not shown) may be formed in the lower case 112, and an opening through which the fastening member N may be inserted into the upper case 111 may be formed.
  • the substrate unit 120 is disposed inside the case unit 110, that is, between the upper case 111 and the lower case 112.
  • the substrate unit 120 is disposed inside the case unit 110 and is electrically connected to the touch controller 140 to process and store a signal from the touch controller 140.
  • the substrate unit 120 may include a first printed circuit board 121 and a second printed circuit board disposed under the first printed circuit board 121 and electrically connected to the first printed circuit board 121. 122 and the first printed circuit board 121 and the second printed circuit board 122, the first printed circuit connected to the first printed circuit board 121 and the second printed circuit board 122 And a security wall 123 forming a security shielding space between the substrate 121 and the second printed circuit board 122.
  • the first printed circuit board 121 and the second printed circuit board 122 are electrically connected to each other, and thus an operation signal of the touch controller 140 is transmitted to the security unit S to be described later.
  • Security shielding space (M) the upper portion is shielded by the first printed circuit board 121, the lower portion is shielded by the second printed circuit board 122 and the side is a space shielded by the security wall 123 ,
  • the security unit (S) is disposed inside the security shielding space (M).
  • the security unit S corresponds to a controller (not shown) that processes input information and issues control commands, and a memory unit (not shown) that stores security information (card number, expiration date, CVC information, etc.). .
  • the security unit S is provided on the second printed circuit board.
  • the above-described touch control unit 140 is disposed inside the security shielding space M. Therefore, the mobile terminal having the security keypad according to the present embodiment can more securely protect the touch controller 140 from hackers.
  • the security wall 123 includes an upper security wall 123a and a lower security wall 123b connected to the upper security wall 123a.
  • the lower security wall 123b is connected to the upper portion of the second printed circuit board 122, and the upper security wall 123a is connected to the lower portion of the first printed circuit board 121.
  • the security wall 123 is provided with a conductive part (not shown) electrically connected to at least one of the first printed circuit board 121 and the second printed circuit board 122.
  • the security wall 123 is connected to the first printed circuit board 121 and the second printed circuit board 122 and shields the security unit S in the lateral direction, whereby the hacking mechanism is positioned on the security unit S. To prevent penetration in any direction.
  • the mobile terminal with a security function is disposed between the first printed circuit board 121 and the second printed circuit board 122, the first printed circuit board 121 and the second printed circuit board It further comprises a tamper-resistant conductive part 150 electrically connected to at least one of the 122 to recognize the forced disassembly of the case unit 110.
  • the tamper resistant conductive part 150 is pressed by the fastening member N penetrating the upper case 111 and the lower case 112 when the upper case 111 and the lower case 112 are assembled.
  • the tamper-resistant conductive part 150 may be made of a conductive rubber that has conductivity and elasticity, and whose electrical resistance value may change according to a change in the degree of compression. Therefore, when the pressurization degree of the upper case 111 and the lower case 112 is weakened, the resistance value of the tamper resistant conductive part 150 is changed.
  • the controller (not shown) recognizes the resistance value of the tamper resistant conductive part 150 thus changed, and deletes security information stored in the memory unit (not shown) when detecting an attempt to forcibly disassemble the case unit 110.
  • the tamper preventing conductive part 150 is electrically connected to at least one of the upper security wall 123a and the lower security wall 123b.
  • the tamper resistant conductive part 150 is electrically connected to the upper security wall 123a or the lower security wall 123b, so that the tamper resistant conductive part 150 physically connects the upper security wall 123a and the lower security wall 123b. Can detect attempts to compromise.
  • a user presses a key button 132 to input data. That is, as the user presses the button head 132b, the button head 132b is moved toward the touch keypad 134.
  • the button leg 132a is elastically deformed by the pressing force of the user who pushes the button head 132b. Accordingly, the button leg 132a is opposite to the direction in which the button head 132b approaches the touch keypad 134. That is, the button head 132b is elastically biased in a direction away from the touch keypad 134.
  • the button leg 132a is elastically deformed by the pressing force of pressing the button head 132b of the user, so that the user can feel the click feeling of pressing the button head 132b.
  • the conductive layer 133 provided on the lower surface of the button head 132b is moved toward the touch keypad 134 together with the button head 132b, and the conductive layer 133 adjacent to the touch keypad 134 as shown in FIG. Electrically interact with touch keypad 134.
  • the capacitance between the conductive layer 133 and the touch keypad 134 is changed, and the touch controller 140, which senses such a change in capacitance, presses the key button 132 to the controller (not shown).
  • the control unit (not shown) receives data by sending an operation signal.
  • the button head 132b After the user releases the button head 132b, the button head 132b, which has been elastically biased by the elastic force of the button leg 132a, is moved upward as shown in FIG.
  • the conductive layer 133 provided on the lower surface of the button head 132b moves together with the button head 132b in a direction away from the touch keypad 134. Accordingly, the touch control unit 140 senses a change in capacitance and the user The control unit (not shown) sends an operation signal of releasing the key button 132 that was pressed.
  • the mobile terminal having the security keypad according to the present embodiment is electrically connected to the conductive layer 133 provided on the key button 132 according to the position of the key button 132 elastically deformed by the pressing operation.
  • the touch keypad 134 By providing a functioning touch keypad 134, it is possible to make the user feel the click feeling of pressing the key button 132 while using the touch keypad 134, which is difficult to hack, so that the elderly or the visually impaired people who have poor eyesight can It is possible to recognize whether the key button 132 is pressed with a sense of click.
  • the present invention can be applied to the mobile terminal industry.

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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)
  • Telephone Set Structure (AREA)
  • Input From Keyboards Or The Like (AREA)

Abstract

L'invention concerne un terminal mobile comportant un clavier de sécurité. Le terminal mobile comportant un clavier de sécurité, selon la présente invention, comprend : un corps de clavier comportant une pluralité de boutons touches; une couche conductrice disposée sur les boutons touches; et un clavier tactile qui est situé sous le corps de clavier et interagit électriquement avec la couche conductrice selon la position des boutons touches qui sont déformés élastiquement par une opération de pression.
PCT/KR2016/002259 2016-03-07 2016-03-07 Terminal mobile comportant un clavier de sécurité WO2017155127A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/KR2016/002259 WO2017155127A1 (fr) 2016-03-07 2016-03-07 Terminal mobile comportant un clavier de sécurité

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/KR2016/002259 WO2017155127A1 (fr) 2016-03-07 2016-03-07 Terminal mobile comportant un clavier de sécurité

Publications (1)

Publication Number Publication Date
WO2017155127A1 true WO2017155127A1 (fr) 2017-09-14

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Application Number Title Priority Date Filing Date
PCT/KR2016/002259 WO2017155127A1 (fr) 2016-03-07 2016-03-07 Terminal mobile comportant un clavier de sécurité

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WO (1) WO2017155127A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108172974A (zh) * 2018-02-06 2018-06-15 深圳鼎智通讯股份有限公司 一种兼容防拆与通讯功能的pos机绕线结构

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1063392A (ja) * 1996-06-13 1998-03-06 Nokia Mobile Phones Ltd タッチスクリーンキーボード
KR20080065397A (ko) * 2007-01-09 2008-07-14 (주)지엔씨 개인휴대단말기
KR20120019934A (ko) * 2010-08-27 2012-03-07 삼성전기주식회사 터치스크린용 키보드 패드
KR101367933B1 (ko) * 2012-08-31 2014-02-27 (주)블루버드 모바일 단말기
KR20140028841A (ko) * 2012-08-31 2014-03-10 (주)블루버드 보안 기능이 구비된 모바일 단말기

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1063392A (ja) * 1996-06-13 1998-03-06 Nokia Mobile Phones Ltd タッチスクリーンキーボード
KR20080065397A (ko) * 2007-01-09 2008-07-14 (주)지엔씨 개인휴대단말기
KR20120019934A (ko) * 2010-08-27 2012-03-07 삼성전기주식회사 터치스크린용 키보드 패드
KR101367933B1 (ko) * 2012-08-31 2014-02-27 (주)블루버드 모바일 단말기
KR20140028841A (ko) * 2012-08-31 2014-03-10 (주)블루버드 보안 기능이 구비된 모바일 단말기

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108172974A (zh) * 2018-02-06 2018-06-15 深圳鼎智通讯股份有限公司 一种兼容防拆与通讯功能的pos机绕线结构
CN108172974B (zh) * 2018-02-06 2024-01-30 深圳鼎智通讯股份有限公司 一种兼容防拆与通讯功能的pos机绕线结构

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