CN103942891B - Epp keyboard - Google Patents
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- CN103942891B CN103942891B CN201410032170.8A CN201410032170A CN103942891B CN 103942891 B CN103942891 B CN 103942891B CN 201410032170 A CN201410032170 A CN 201410032170A CN 103942891 B CN103942891 B CN 103942891B
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Abstract
The invention discloses a kind of EPP keyboard, comprise the key panel, the first framework, several buttons be connected with the first framework, silica gel pad, upper protection circuit plate, keyboard board, keyboard mainboard, several button conductive post matched with each button and the keyboard bonnet that set gradually from top to bottom; Described silica gel pad is provided with several projections matched with each button, and upper protection circuit plate is equipped with through hole with on position corresponding with each projection on keyboard board; The baffle plate that described button conductive post comprises montant and is connected with montant lower end; Described montant is positioned at through hole, and baffle plate and keyboard board are connected.The present invention has that to disassemble difficulty large, and anti-attack ability is strong, and data security is good; Reduce the risk that cardholder information is revealed and property is impaired, guarantee the feature that in cardholder account, debt is not easily stolen.
Description
Technical field
The present invention relates to ATM (automatic teller machine) (ATM) technical field of safety protection, especially relating to one, to resist external attack ability strong, the EPP keyboard that the Transaction Information of EPP keyboard is not easily stolen.
Background technology
EPP keyboard is the user data input equipment of the holder be installed in ATM, needs to input PIN code when holder uses ATM to conclude the business, and EPP keyboard is given backstage after being encrypted PIN code and verified.
At present, the attack means of EPP keyboard is mainly: at the button place of the key panel of EPP keyboard, BUG circuit is installed, when holder is by EPP input through keyboard PIN code, the plaintext of BUG circuit record PIN code; Thus steal the Transaction Information of EPP keyboard.
Therefore, a kind ofly resist the strong EPP keyboard of external attack ability in the urgent need to developing at present, thus ensure that the PIN of holder is not obtained by lawless person, the protection personal information of holder and the safety of account.
Chinese patent mandate publication number: CN201237811Y, authorize publication date on May 13rd, 2009, disclose a kind of reinforced ATM keyboard, comprise key panel, be arranged on the circuit board below key panel, the screw closely fix key panel and circuit board and nut, the position that described key panel is fixedly mounted with screw is embedded with reinforcement.The weak point of this utility model is, resists external attack ability more weak, and the Transaction Information of EPP keyboard is easily stolen.
Summary of the invention
Goal of the invention of the present invention is that to resist external attack ability more weak in order to overcome EPP keyboard of the prior art, the deficiency that the Transaction Information of EPP keyboard is easily stolen, providing one, to resist external attack ability strong, the EPP keyboard that the Transaction Information of EPP keyboard is not easily stolen.
To achieve these goals, the present invention is by the following technical solutions:
A kind of EPP keyboard, comprises the key panel, the first framework, several buttons be connected with the first framework, silica gel pad, upper protection circuit plate, keyboard board, keyboard mainboard, several button conductive post matched with each button and the keyboard bonnet that set gradually from top to bottom; Described silica gel pad is provided with several projections matched with each button, and upper protection circuit plate is equipped with through hole with on position corresponding with each projection on keyboard board; The baffle plate that described button conductive post comprises montant and is connected with montant lower end; Described montant is positioned at through hole, and baffle plate and keyboard board are connected;
Keyboard mainboard lower surface is provided with controller, keyboard mainboard upper surface be provided with key contacts with each projection corresponding section, each key contacts of keyboard mainboard is provided with middle part metal key-press reed upwardly; The upper surface of each button conductive post contacts with corresponding protruding lower surface, and the lower surface of each button conductive post contacts with corresponding metal key-press reed upper surface;
Keyboard mainboard upper surface and upper protection circuit plate lower surface are equipped with the first pad group, keyboard board is provided with the first conductive rubber block matched with the first pad group, and the first conductive rubber block upper and lower surface is electrically connected with the first pad group on upper protection circuit plate and keyboard mainboard respectively; Each key contacts and the first pad group are electrically connected with controller respectively.Key panel, button framework, silica gel pad, upper protection circuit plate are connected successively with keyboard board, and keyboard bonnet is connected with keyboard board.
Key contacts comprises rectangular conductive and is coated with line and is positioned at the circular conductive coating in the middle part of rectangular conductive painting line, when the hand depresses button of user, button conductive post extrusion metal button reed, and make to contact with circular conductive coating in the middle part of metal key-press reed, when the hand of user leaves button, pop up in the middle part of metal key-press reed, with circular conductive coating segregation in the middle part of metal key-press reed.
After each ingredient of EPP keyboard of the present invention is assembled together; under the squeezing action of upper protection circuit plate and keyboard mainboard, the first conductive rubber block makes pad corresponding in the first pad group on protection circuit plate and the first pad group on keyboard mainboard be electrically connected one by one.If someone wants to install BUG circuit at the key circuit place on keyboard mainboard surface; need each assembly first disassembling EPP keyboard; but; the pressure that the first conductive rubber block upper and lower surface is subject to can be caused in the process disassembled to lose; and cause the electrical connection of the first conductive rubber pad corresponding with the first pad group on upper protection circuit plate and the first pad group on keyboard mainboard to disconnect further; after controller detects that circuit disconnects; automatically the program be stored in controller and data can be controlled to delete, thus ensure that the security of the data in EPP keyboard.
Therefore, the present invention has that to resist external attack ability strong, and the Transaction Information of EPP keyboard is not easily stolen, and reduces the risk that cardholder information is revealed and property is impaired, guarantees the feature that in cardholder account, debt is not easily stolen.
As preferably, described keyboard mainboard is also provided with 3 contact switchs, contact switch comprises rectangular conductive and is coated with line and is positioned at the circular conductive coating in the middle part of rectangular conductive painting line, keyboard mainboard is provided with 3 metal switch reeds matched with contact switch respectively, metal switch reed and rectangular conductive are coated with line and are electrically connected, and upwards arch upward in the middle part of metal switch reed; Keyboard board is provided with 3 for extrusion metal switch spring makes the contact compression leg that metal switch reed contacts with circular conductive coating; Each contact switch is all electrically connected with controller.
Elastic deformation can be there is in metal switch reed under the pressure effect of contact compression leg, the center of metal switch reed is electrically connected with the circular conductive coating on the keyboard mainboard of metal switch reed bottom, thus makes the rectangular conductive of the correspondence be positioned on keyboard mainboard be coated with line and be positioned at the circular conductive coating formation electrical connection in the middle part of rectangular conductive painting line.When upper protection circuit plate is lost contact compression leg applied pressure; the elastic deformation of metal switch reed can disappear; the electrical connection that rectangular conductive is coated with between line and the circular conductive coating in the middle part of rectangular conductive painting line disconnects; when controller detects that rectangular conductive is coated with the signal of the electrical connection disconnection between line and circular conductive coating; automatically the program be stored in controller and data can be controlled to delete, thus ensure that the security of the data in EPP keyboard.
As preferably, between described keyboard mainboard and keyboard bonnet, be provided with the second framework, lower protection circuit plate and over cap from top to bottom successively; Described second framework is provided with 2 the second conductive rubber blocks; lower protection circuit plate upper surface and keyboard mainboard lower surface are equipped with two corresponding the second pad groups; the upper and lower surface of the second conductive rubber block is electrically connected with the second pad group of keyboard mainboard lower surface, lower protection circuit plate respectively, and the second pad group is electrically connected with controller.
Second conductive rubber block makes pad corresponding in the second pad group on lower protection circuit plate and the second pad group on keyboard mainboard form electrical connection under the squeezing action of lower protection circuit plate and keyboard mainboard; If someone wants to install BUG circuit at the key circuit place on keyboard mainboard surface; need each assembly first disassembling EPP keyboard; but; the pressure that the second conductive rubber block upper and lower surface can be caused in the process disassembled to be subject to is lost; and cause the electrical connection of the second conductive rubber pad corresponding with the second pad group on lower protection circuit plate and the second pad group on keyboard mainboard to disconnect further; after controller detects that circuit disconnects; automatically the program be stored in controller and data can be controlled to delete, thus ensure that the security of the data in EPP keyboard.
As preferably, described silica gel pad top surface edge is provided with 2 hemispherical projections, the silica gel pad lower surface corresponding with 2 hemispherical projections is equipped with the conductive coating for being electrically connected with controller; The silica gel pad of hemispherical prominence is fixedly connected with ATM; Controller is electrically connected with the USB interface be located on keyboard mainboard.
ATM keyboard installation place back side of panel comprises 4 studs, and 4 studs are connected with clamp nut through after silica gel pad, upper protection circuit plate, keyboard board successively, exposed silica gel pad outside key panel and the tight pressing of ATM panel.This mounting means can only make EPP key panel out exposed, adds the difficulty that outside violence is disassembled.
In normal state, together with silica gel pad is closely pressed together on ATM panel, hemispherical projection can extrude conductive coating, thus conductive coating is electrically connected with controller, when needing each assembly normally disassembling EPP keyboard, by USB interface to controller input of control commands, the electrical connection of conductive coating and controller disconnects, and controller also can not the self-destruction program of start-up routine and data;
But, if not by USB interface to controller input of control commands, the electrical connection of conductive coating and controller disconnects; Then controller is thought to have received outside attack, then automatically control the program be stored in controller and data to delete, thus ensure that the security of the data in EPP keyboard.
As preferably, described first pad group comprises 9 rectangular pads, and 9 rectangular pads on upper protection circuit plate are corresponding one by one with 9 rectangular pads of keyboard mainboard.
As preferably, described upper protection circuit plate is four layers of printed circuit board, and two internal planes of four layers of printed circuit board comprise a pair snakelike signal wire respectively, and often pair of snakelike signal wire comprises two signal input port ends and two signal outlet ends; 4 inlet ends are electrically connected with 4 rectangular pads on upper protection circuit plate bottom respectively one by one by hollow conductive post; 4 endpiece are electrically connected with other 4 rectangular pads on upper protection circuit plate bottom respectively one by one by hollow conductive post.
Snakelike signal wire be arranged so that under the prerequisite of installation relation not destroying protection circuit plate and keyboard mainboard, electrical connection between upper protection circuit plate and keyboard mainboard is invisible in outside, make the person of disassembling can only keep above-mentioned installation relation prerequisite under, upper protection circuit plate is successively disassembled, when after the electric connection point exposing snakelike signal wire and controller, need to connect corresponding signal level on corresponding electric connection point, then the snakelike signal wire of current layer is cleaned out, then the protection circuit of lower one deck is cracked again, finally out exposed for the key circuit on keyboard mainboard, make to disassemble difficulty to improve, extremely difficult being issued in the condition of not trigger controller self-destruction disassembles object.
As preferably, described second pad group comprises 3 rectangular pads, second conductive rubber is rearranged by the conductive rubber slice of 3 mutually insulateds, and the upper and lower end face of 3 conductive rubber slices contacts with 3 rectangular pads on lower protection circuit plate upper surface and keyboard mainboard lower surface respectively; Described lower protection circuit plate is provided with two snakelike signal wires; one end of two snakelike signal wires is electrically connected with 2 rectangular pads of lower protection circuit plate respectively by hollow conductive post, and the other end of two snakelike signal wires is electrically connected with 2 rectangular pads of keyboard mainboard lower surface respectively by hollow conductive post.
Two snakelike signal wires be arranged so that the prerequisite of installation relation of protection circuit plate and keyboard mainboard under not destroying under; electrical connection between lower protection circuit plate and keyboard mainboard is invisible in outside; make the person of disassembling can only keep above-mentioned installation relation prerequisite under; lower protection circuit plate is successively decomposed; make to disassemble difficulty to improve, extremely difficult being issued in the condition of not trigger controller self-destruction disassembles object.
As preferably, the live width≤6mil of described snakelike signal wire, distance between centers of tracks≤6mil, the signal level in two adjacent signal line is contrary.
The restriction of live width and distance between centers of tracks makes to hole to circuit board, cutting method is extremely difficult to the catch net overcoming snakelike signal wire and formed; circuit board is holed or one or more wiring broken string or short circuit that cutting can make in serpentine, thus trigger controller starts self-destruction program.
As preferably, the first conductive rubber block is rearranged by the conductive rubber slice of 9 mutually insulateds, and the upper and lower end face of 9 conductive rubber slices contacts with 9 rectangular pads on upper protection circuit plate lower surface and keyboard mainboard upper surface respectively.
As preferably, the lower surface of key panel comprises 4 studs, and 4 studs are connected with clamp nut through after framework, silica gel pad, upper protection circuit plate, keyboard board successively; Keyboard bonnet is connected with keyboard board.
In sum: when circuit is stolen in the key circuit place installation that the person of disassembling attempts under the button of EPP keyboard, must disassemble upper protection circuit plate, to upper protection circuit plate disassemble protecting network that the snakelike signal wire that can destroy upper protection circuit intralamellar part formed or trigger hide in upper protection circuit plate and keyboard mainboard by the first conductive rubber and contact compression leg provide respectively to pressure-sensitive structure; When the person of disassembling attempts to disassemble from EPP keyboard bottom, the protection mechanism that lower protection circuit plate and the second conductive rubber provide can be triggered.All triggerings to protection mechanism; the self-destruction program of controller is independently caused in capital; EPP keyboard is made to enter down state; adopt the EPP keyboard of these protection mechanisms; have and higher disassemble difficulty and security, thus improve the security that ATM uses, improve the anti-attack ability of ATM (Automatic Teller Machine); reduce the risk that cardholder information is revealed and property is impaired, guarantee that in cardholder account, debt is not easily stolen.
Therefore, the present invention has following beneficial effect: it is large that (1) disassembles difficulty, and anti-attack ability is strong, and data security is good; (2) reduce the risk that cardholder information is revealed and property is impaired, guarantee that in cardholder account, debt is not easily stolen.
Accompanying drawing explanation
Fig. 1 is a kind of detonation configuration schematic diagram of the present invention;
Fig. 2 is another kind of detonation configuration schematic diagram of the present invention;
Fig. 3 is a kind of structural representation of snakelike signal wire of the present invention;
Fig. 4 is a kind of structural representation of upper protection circuit plate of the present invention;
Fig. 5 is a kind of structural representation of lower protection circuit plate of the present invention;
Fig. 6 is a kind of structural representation of keyboard mainboard of the present invention.
In figure: key panel 1, first framework 2, button 3, silica gel pad 4, upper protection circuit plate 5, keyboard board 6, keyboard mainboard 7, keyboard bonnet 8, projection 9, through hole 10, controller 13, key contacts 14, metal key-press reed 15, first pad group 16, first conductive rubber block 17, contact switch 18, metal switch reed 19, contact compression leg 20, second framework 21, lower protection circuit plate 22, over cap 23, second conductive rubber block 24, second pad group 25, hemispherical projection 26, USB interface 27, snakelike signal wire 28, hollow conductive post 29, rectangular pads 30, stud 31, clamp nut 32, conductive rubber limitting casing 33, fastening bolt 34, button conductive post 35, spacing hole 36, internal planes 37, battery 38.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention will be further described.
Embodiment is as shown in Figure 1 a kind of EPP keyboard, comprises key panel 1, first framework 2,16 buttons 3, silica gel pad 4, upper protection circuit plate 5, keyboard board 6, keyboard mainboard 7,20 button conductive post 35 and the keyboard bonnet 8 that set gradually from top to bottom; Silica gel pad is provided with 20 projections 9, and upper protection circuit plate is equipped with through hole 10 with on position corresponding with each projection on keyboard board; The baffle plate that button conductive post comprises montant and is connected with montant lower end; Montant is positioned at through hole, and baffle plate and keyboard board are connected;
Keyboard mainboard upper surface be provided with key contacts 14 with each projection corresponding section, as shown in Figure 6, the figure of a figure to be the figure of keyboard mainboard upper surface, b figure be keyboard mainboard upper surface in Fig. 6.Keyboard mainboard lower surface is provided with controller 13, and each key contacts of keyboard mainboard is provided with middle part metal key-press reed 15 upwardly; The upper surface of each button conductive post contacts with corresponding protruding lower surface, and the lower surface of each button conductive post contacts with corresponding metal key-press reed upper surface; Snakelike signal wire in the present embodiment, pad, reed, contact and hollow conductive post all adopt copper product.
As shown in Figure 1, keyboard mainboard upper surface and upper protection circuit plate lower surface are equipped with the first pad group 16, keyboard board is provided with the first conductive rubber block 17, the first conductive rubber block upper and lower surface matched with the first pad group and is electrically connected with the first pad group on upper protection circuit plate and keyboard mainboard respectively; Each key contacts and 2 the first pad groups are electrically connected with controller respectively.
As shown in Figure 2, the second framework 21, lower protection circuit plate 22 and over cap 23 is provided with between keyboard mainboard and keyboard bonnet from top to bottom successively; Second framework is provided with 2 the second conductive rubber blocks 24; the upper and lower surface lower protection circuit plate upper surface and keyboard mainboard lower surface being equipped with two corresponding the second pad group 25, second conductive rubber blocks is electrically connected with the second pad group of keyboard mainboard lower surface, lower protection circuit plate respectively.
Fig. 1 and Fig. 2 forms complete explosive view of the present invention, being provided with the hole for placing conductive rubber limitting casing 33, first conductive rubber limitting casing 33 being put into hole, then the first conductive rubber is put into conductive rubber limitting casing in Fig. 1; Fastening bolt 34 is successively through keyboard mainboard, the second framework, lower protection circuit plate and over cap; Keyboard mainboard, the second framework, lower protection circuit plate and over cap are fixed up.Second framework is provided with for carrying out spacing spacing hole 36 to the second conductive rubber.
As shown in Figure 2, keyboard mainboard is also provided with 3 contact switchs 18, as shown in Figure 6, contact switch comprises rectangular conductive and is coated with line and is positioned at the circular conductive coating in the middle part of rectangular conductive painting line, keyboard mainboard is provided with 3 metal switch reeds 19 matched with contact switch respectively, metal switch reed and rectangular conductive are coated with line and are electrically connected, and upwards arch upward in the middle part of metal switch reed; As shown in Figure 1, keyboard board is provided with 3 for extrusion metal switch spring and makes the contact compression leg 20 that metal switch reed contacts with circular conductive coating; Each contact switch is all electrically connected with controller.
Silica gel pad top surface edge is provided with 2 hemispherical projections 26, and the silica gel pad lower surface corresponding with 2 hemispherical projections is equipped with conductive coating, and 2 conductive coatings are all electrically connected with controller; The silica gel pad of hemispherical prominence is fixedly connected with ATM; Controller is electrically connected with the USB interface 27 be located on keyboard mainboard.Keyboard mainboard also comprises battery 38.
First pad group comprises 9 rectangular pads 30, and 9 rectangular pads on upper protection circuit plate are corresponding one by one with 9 rectangular pads of keyboard mainboard.
As shown in Figure 3, Figure 4, upper protection circuit plate is four layers of printed circuit board, two internal planes 37 of four layers of printed circuit board comprises respectively a pair snakelike signal wire 28, and often pair of snakelike signal wire comprises two signal input port ends and two signal outlet ends; 4 inlet ends are electrically connected with 4 rectangular pads on upper protection circuit plate bottom respectively one by one by hollow conductive post 29; 4 endpiece are electrically connected with other 4 rectangular pads on upper protection circuit plate bottom respectively one by one by hollow conductive post 29.
As shown in Figure 5, second pad group 25 comprises 3 rectangular pads 30, second conductive rubber is rearranged by the conductive rubber slice of 3 mutually insulateds, and the upper and lower end face of 3 conductive rubber slices contacts with 3 rectangular pads on lower protection circuit plate upper surface and keyboard mainboard lower surface respectively; Lower protection circuit plate is provided with two snakelike signal wires; one end of two snakelike signal wires is electrically connected with 2 rectangular pads of lower protection circuit plate respectively by hollow conductive post, and the other end of two snakelike signal wires is electrically connected with 2 rectangular pads of keyboard mainboard lower surface respectively by hollow conductive post.
The live width of snakelike signal wire is 5mil, and distance between centers of tracks is 4mil, and the signal level in two adjacent signal line is contrary.
First conductive rubber block is rearranged by the conductive rubber slice of 9 mutually insulateds, and the upper and lower end face of 9 conductive rubber slices contacts with 9 rectangular pads on upper protection circuit plate lower surface and keyboard mainboard upper surface respectively.
The lower surface of key panel comprises 4 studs, 31,4 studs and is connected with clamp nut 32 through after the first framework, silica gel pad, upper protection circuit plate, keyboard board successively; Keyboard bonnet is connected with keyboard board.
Should be understood that the present embodiment is only not used in for illustration of the present invention to limit the scope of the invention.In addition should be understood that those skilled in the art can make various changes or modifications the present invention, and these equivalent form of values fall within the application's appended claims limited range equally after the content of having read the present invention's instruction.
Claims (10)
1. an EPP keyboard, it is characterized in that, comprise the key panel (1), the first framework (2), several buttons (3) be connected with the first framework, silica gel pad (4), upper protection circuit plate (5), keyboard board (6), keyboard mainboard (7), several button conductive post (35) matched with each button and the keyboard bonnet (8) that set gradually from top to bottom; Described silica gel pad is provided with several projections matched with each button (9), upper protection circuit plate with position corresponding with each projection on keyboard board is equipped with through hole (10); The baffle plate that described button conductive post comprises montant and is connected with montant lower end; Described montant is positioned at through hole, and baffle plate and keyboard board are connected;
Keyboard mainboard lower surface is provided with controller (13), keyboard mainboard upper surface be provided with key contacts (14) with each projection corresponding section, each key contacts of keyboard mainboard is provided with middle part metal key-press reed (15) upwardly; The upper surface of each button conductive post contacts with corresponding protruding lower surface, and the lower surface of each button conductive post contacts with corresponding metal key-press reed upper surface;
Keyboard mainboard upper surface and upper protection circuit plate lower surface are equipped with the first pad group (16), keyboard board is provided with the first conductive rubber block (17) matched with the first pad group, and the first conductive rubber block upper and lower surface is electrically connected with the first pad group on upper protection circuit plate and keyboard mainboard respectively; Each key contacts and the first pad group are electrically connected with controller respectively.
2. EPP keyboard according to claim 1, it is characterized in that, described keyboard mainboard is also provided with 3 contact switchs (18), contact switch comprises rectangular conductive and is coated with line and is positioned at the circular conductive coating in the middle part of rectangular conductive painting line, keyboard mainboard is provided with 3 metal switch reeds (19) matched with contact switch respectively, metal switch reed and rectangular conductive are coated with line and are electrically connected, and upwards arch upward in the middle part of metal switch reed; Keyboard board is provided with 3 for extrusion metal switch spring and the contact compression leg (20) making metal switch reed contact with circular conductive coating; Each contact switch is all electrically connected with controller.
3. EPP keyboard according to claim 1, is characterized in that, is provided with the second framework (21), lower protection circuit plate (22) and over cap (23) between described keyboard mainboard and keyboard bonnet from top to bottom successively; Described second framework is provided with 2 the second conductive rubber blocks (24); lower protection circuit plate upper surface and keyboard mainboard lower surface are equipped with two corresponding the second pad groups (25); the upper and lower surface of the second conductive rubber block is electrically connected with the second pad group of keyboard mainboard lower surface, lower protection circuit plate respectively, and the second pad group is electrically connected with controller.
4. EPP keyboard according to claim 1, it is characterized in that, described silica gel pad top surface edge is provided with 2 hemispherical projections (26), the silica gel pad lower surface corresponding with 2 hemispherical projections is equipped with the conductive coating for being electrically connected with controller; The silica gel pad of hemispherical prominence is fixedly connected with ATM; Controller is electrically connected with the USB interface be located on keyboard mainboard (27).
5. EPP keyboard according to claim 1, is characterized in that, described first pad group comprises 9 rectangular pads (30), and 9 rectangular pads on upper protection circuit plate are corresponding one by one with 9 rectangular pads of keyboard mainboard.
6. EPP keyboard according to claim 5, it is characterized in that, described upper protection circuit plate is four layers of printed circuit board, two internal planes (37) of four layers of printed circuit board comprise a pair snakelike signal wire (28) respectively, and often pair of snakelike signal wire comprises two signal input port ends and two signal outlet ends; 4 inlet ends are electrically connected with 4 rectangular pads on upper protection circuit plate bottom respectively one by one by hollow conductive post (29); 4 endpiece are electrically connected with other 4 rectangular pads on upper protection circuit plate bottom respectively one by one by hollow conductive post (29).
7. EPP keyboard according to claim 3, it is characterized in that, described second pad group comprises 3 rectangular pads (30), second conductive rubber is rearranged by the conductive rubber slice of 3 mutually insulateds, and the upper and lower end face of 3 conductive rubber slices contacts with 3 rectangular pads on lower protection circuit plate upper surface and keyboard mainboard lower surface respectively; Described lower protection circuit plate is provided with two snakelike signal wires; one end of two snakelike signal wires is electrically connected with 2 rectangular pads of lower protection circuit plate respectively by hollow conductive post, and the other end of two snakelike signal wires is electrically connected with 2 rectangular pads of keyboard mainboard lower surface respectively by hollow conductive post.
8. the EPP keyboard according to claim 6 or 7, is characterized in that, the live width≤6mil of described snakelike signal wire, distance between centers of tracks≤6mil, and the signal level in two adjacent signal line is contrary.
9. the EPP keyboard according to claim 1 or 2 or 3 or 4 or 5 or 6 or 7; it is characterized in that; first conductive rubber block is rearranged by the conductive rubber slice of 9 mutually insulateds, and the upper and lower end face of 9 conductive rubber slices contacts with 9 rectangular pads on upper protection circuit plate lower surface and keyboard mainboard upper surface respectively.
10. the EPP keyboard according to claim 1 or 2 or 3 or 4 or 5 or 6 or 7, it is characterized in that, the lower surface of key panel comprises 4 studs (31), and 4 studs are connected with clamp nut (32) through after the first framework, silica gel pad, upper protection circuit plate, keyboard board successively; Keyboard bonnet is connected with keyboard board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410032170.8A CN103942891B (en) | 2014-01-23 | 2014-01-23 | Epp keyboard |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410032170.8A CN103942891B (en) | 2014-01-23 | 2014-01-23 | Epp keyboard |
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| CN103942891A CN103942891A (en) | 2014-07-23 |
| CN103942891B true CN103942891B (en) | 2016-04-06 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1773575A (en) * | 2004-11-12 | 2006-05-17 | 纳蒂卢斯晓星公司 | Personal identification code logging apparatus against unauthorized use |
| CN1862458A (en) * | 2005-05-12 | 2006-11-15 | Smk株式会社 | Key inputting device and telecontrol sending machine with this device |
| CN200979849Y (en) * | 2006-11-01 | 2007-11-21 | 杭州东信金融技术服务有限公司 | A physical facility of a hard-encryption password keyboard to prevent attack |
| JP2010250412A (en) * | 2009-04-13 | 2010-11-04 | Hitachi Omron Terminal Solutions Corp | Key input device |
| KR20110111663A (en) * | 2010-04-05 | 2011-10-12 | 노틸러스효성 주식회사 | An atm equipped with pin-pad providing matching buttons for display menu |
-
2014
- 2014-01-23 CN CN201410032170.8A patent/CN103942891B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1773575A (en) * | 2004-11-12 | 2006-05-17 | 纳蒂卢斯晓星公司 | Personal identification code logging apparatus against unauthorized use |
| CN1862458A (en) * | 2005-05-12 | 2006-11-15 | Smk株式会社 | Key inputting device and telecontrol sending machine with this device |
| CN200979849Y (en) * | 2006-11-01 | 2007-11-21 | 杭州东信金融技术服务有限公司 | A physical facility of a hard-encryption password keyboard to prevent attack |
| JP2010250412A (en) * | 2009-04-13 | 2010-11-04 | Hitachi Omron Terminal Solutions Corp | Key input device |
| KR20110111663A (en) * | 2010-04-05 | 2011-10-12 | 노틸러스효성 주식회사 | An atm equipped with pin-pad providing matching buttons for display menu |
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| CN103942891A (en) | 2014-07-23 |
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