CN204229557U - A kind of POS safety guard - Google Patents
A kind of POS safety guard Download PDFInfo
- Publication number
- CN204229557U CN204229557U CN201420648080.7U CN201420648080U CN204229557U CN 204229557 U CN204229557 U CN 204229557U CN 201420648080 U CN201420648080 U CN 201420648080U CN 204229557 U CN204229557 U CN 204229557U
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- resistive touch
- touch switch
- pos
- film
- resistance
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Abstract
The utility model provides a kind of POS safety guard, and described protective device comprises a resistive touch switch and a safety detection module; The described resistive touch switch left and right sides is provided with a pad, and be arranged on POS pcb board by pad, described resistive touch switch comprises a film and a glass, and described glass is arranged on film, and the film one side adjacent with glass is provided with an ITO coating; Described safety detection module comprises a strong pull-down resistance, weak pull-up resistance and a CPU; Described strong pull-down resistance is arranged at the upper end of resistive touch switch, and weak pull-up resistance is arranged at the lower end of resistive touch switch, and described CPU is connected with resistive touch switch.The induction of the utility model to pressure is sensitiveer, makes safeguard protection more stable, reliable.
Description
Technical field
The utility model relates to POS security technology area, particularly a kind of POS safety guard.
Background technology
POS is a kind of point-of-sale terminal with clearing of account function, is widely used in the places such as supermarket, chain store, hypermarket, restaurant.Because relate to the transaction of bank card, there is very high requirement to its security performance, must ensure that significant data such as the key etc. inside POS is not stolen.In order to the security performance of specification POS, payment card industry data security standard committee makes PCI Valuation Standard, and PCI Valuation Standard is intended to strict control data and stores with the data security standard ensureing Payment Card user online transaction safety.Current POS is for meeting PCI standard, and important data line or sensitive element are mainly surrounded with safety signal line by the method adopted, and prevents someone from detecting these important data line and elements.Safety signal line is a kind of signal wire to signal level sensitivity.Once the level of these signal wires changes, detected by CPU, CPU will wipe out all protected datas.The major way of safety signal line protection significant data line and Sensitive Apparatus has coiling, protection contact, zebra bar etc.The principle of traditional protection contact is switch, to be placed on by conducting resinl on contact and to impose certain pressure, can realize the closed of switch.
Traditional conducting resinl be placed on contact and impose certain pressure, the closed scheme of switch can be realized, there is the problem of insufficient sensitivity, conducting resinl loose contact is there is in comparatively strict environment (as vibration), switch disconnects and causes false triggering, causes user to use inconvenience and loss.
Summary of the invention
The technical problems to be solved in the utility model, is to provide a kind of POS safety guard, sensitiveer to the induction of pressure, makes safeguard protection more stable, reliable.
The utility model is achieved in that a kind of POS safety guard, and described protective device comprises a resistive touch switch and a safety detection module; The described resistive touch switch left and right sides is provided with a pad, and be arranged on POS pcb board by pad, described resistive touch switch comprises a film and a glass, and described glass is arranged on film, and the film one side adjacent with glass is provided with an ITO coating; Pressure can be transformed into electric signal by ITO coating; Described safety detection module comprises a strong pull-down resistance, weak pull-up resistance and a CPU; Described strong pull-down resistance is arranged at the upper end of resistive touch switch, and weak pull-up resistance is arranged at the lower end of resistive touch switch, and described CPU is connected with resistive touch switch.
Further, the distance between two-layer ITO coating is 2.3 ~ 2.7 microns.
Further, in described POS shell, a pillar is set, and is withstood by pillar on the film of described resistive touch switch.
The utility model has the advantage of: the utility model is by the application of resistive touch switch (i.e. resistive touch inductive material) at pos machine safety shield; relative to the mode of traditional conducting resinl extruding; sensitiveer to the induction of pressure, make safeguard protection more stable, reliable.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the sectional view of the utility model resistive touch switch.
Embodiment
Refer to shown in Fig. 1 and Fig. 2, a kind of POS safety guard of the present utility model, described protective device comprises resistive touch switch 1 and a safety detection module 2; Described resistive touch switch 1 left and right sides is provided with a pad 3, and be arranged on POS (not shown) pcb board 4 by pad 3, described resistive touch switch 1 comprises film 11 and a glass 12, described glass 12 is arranged on film 11, and film 11 one side adjacent with glass 12 is provided with an ITO (nano indium tin metal oxide) coating (not shown); Pressure can be transformed into electric signal by ITO coating; Wherein, resistive touch switch 1 is a touch sensor, and its energy induction pressure, changes into the connection of electric signal by pressure.Described safety detection module 2 comprises a strong pull-down resistance R1, weak pull-up resistance R2 and CPU; Described strong pull-down resistance R1 is arranged at the upper end of resistive touch switch 1, and weak pull-up resistance R2 is arranged at the lower end of resistive touch switch 1, and described CPU is connected with resistive touch switch 1.Resistive touch switch uses up-to-date resistive touch induction material as the switch to pressure sensitive, resistive touch material generally uses as touch-screen in mobile phone industry, be a kind of working environment completely isolated to external world, be not afraid of dust and steam, can various rugged environment be adapted to.It can touch with any object, and stability is a kind of working environment completely isolated to external world better, is not afraid of dust and steam, can adapt to various rugged environment.It can touch with any object, and stability is good, and reaction sensitivity is fine, and proven technique and lower threshold, and cost is comparatively cheap.Wherein, resistive touch switch is made with touch-screen material.
When touch operation, the ITO coating of film 11 lower floor can touch the ITO coating of glass superstrate, spreads out of corresponding electric signal, deliver to CPU through change-over circuit via resistive touch switch 1.
Wherein, the distance between two-layer ITO coating is 2.3 ~ 2.7 microns.Be preferably 2.5 microns, very small pressure, two-layer ITO coating just can be made to contact with each other, form conducting state.This material is applied in safeguard protection, only needs the signal of top electrode ITO and bottom electrode ITO to extract, incite somebody to action wherein one deck pull-up with a weak pull-up resistance, and drop-down by another layer with a strong pull-down resistance.
In described POS shell (not shown), a pillar (not shown) is set, and is withstood by pillar on the film of described resistive touch switch.This pillar is rigid pillar.
Whether resistive touch screen material can detect to have to touch and occur, if the measuring voltage of pull-up layer is greater than certain logic threshold, just shows not touch, otherwise then has touch.Due to properties of materials and 2.5 micron pitch, the induction of this touch is very sensitive, the safety monitoring signal of CPU can identify faint pressure, be not easy because insufficient pressure causes false triggering, this characteristic can be utilized, resistance-type is made into specific encapsulation, the pull-up layer signal of touch-screen and drop-down layer signal are extracted with pad form, pass through welding manner, be fixed on pcb board, pressure is applied as touch using the shell of POS, the feedback signal of touch is connected to the safety monitoring module of CPU, once shell is opened, CPU will monitor no touch signal, safety signal is caused to trigger, erasing needs the secure data of protection.
The foregoing is only preferred embodiment of the present utility model, all equalizations done according to the utility model claim change and modify, and all should belong to covering scope of the present utility model.
Claims (3)
1. a POS safety guard, is characterized in that: described protective device comprises a resistive touch switch and a safety detection module; The described resistive touch switch left and right sides is provided with a pad, and be arranged on POS pcb board by pad, described resistive touch switch comprises a film and a glass, and described glass is arranged on film, and the film one side adjacent with glass is provided with an ITO coating; Pressure can be transformed into electric signal by ITO coating; Described safety detection module comprises a strong pull-down resistance, weak pull-up resistance and a CPU; Described strong pull-down resistance is arranged at the upper end of resistive touch switch, and weak pull-up resistance is arranged at the lower end of resistive touch switch, and described CPU is connected with resistive touch switch.
2. a kind of POS safety guard according to claim 1, is characterized in that: the distance between two-layer ITO coating is 2.3 ~ 2.7 microns.
3. a kind of POS safety guard according to claim 1, be is characterized in that: arrange a pillar in described POS shell, and is withstood by pillar on the film of described resistive touch switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420648080.7U CN204229557U (en) | 2014-10-30 | 2014-10-30 | A kind of POS safety guard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420648080.7U CN204229557U (en) | 2014-10-30 | 2014-10-30 | A kind of POS safety guard |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204229557U true CN204229557U (en) | 2015-03-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420648080.7U Active CN204229557U (en) | 2014-10-30 | 2014-10-30 | A kind of POS safety guard |
Country Status (1)
| Country | Link |
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| CN (1) | CN204229557U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105447413A (en) * | 2015-11-13 | 2016-03-30 | 深圳市新国都支付技术有限公司 | Dynamic signal based security protection apparatus and method and POS machine |
| WO2017210996A1 (en) * | 2016-06-08 | 2017-12-14 | 福建联迪商用设备有限公司 | Tamper-evident detection system and method based on capacitance detection principle |
-
2014
- 2014-10-30 CN CN201420648080.7U patent/CN204229557U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105447413A (en) * | 2015-11-13 | 2016-03-30 | 深圳市新国都支付技术有限公司 | Dynamic signal based security protection apparatus and method and POS machine |
| WO2017210996A1 (en) * | 2016-06-08 | 2017-12-14 | 福建联迪商用设备有限公司 | Tamper-evident detection system and method based on capacitance detection principle |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |