CN202930277U - Safety switch - Google Patents
Safety switch Download PDFInfo
- Publication number
- CN202930277U CN202930277U CN 201220572880 CN201220572880U CN202930277U CN 202930277 U CN202930277 U CN 202930277U CN 201220572880 CN201220572880 CN 201220572880 CN 201220572880 U CN201220572880 U CN 201220572880U CN 202930277 U CN202930277 U CN 202930277U
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- CN
- China
- Prior art keywords
- pad
- sensitive signal
- welding pad
- protection
- protection pad
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- Expired - Lifetime
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Abstract
The utility model relates to a safety switch which is arranged on a protected circuit board and is electrically connected with the protected circuit board. The safety switch comprises a housing. Metal spring sheets and a safety contact welding pad are provided below the housing. The safety contact welding pad comprises a protection welding pad and a sensitive signal welding pad. The first protection welding pad is internally provided with a first sensitive signal welding pad. The first sensitive signal welding pad is internally provided with a second protection welding pad. The second protection welding pad is internally provided with a second sensitive signal welding pad. The metal spring sheets are connected with the first sensitive signal welding pad, and enclose the first sensitive signal welding pad. The metal spring sheets and the second sensitive signal welding pad are in elastic contact. With the above structure, if the housing is not normally pressed, the metal spring sheets spring up, and the first sensitive signal welding pad and the second sensitive signal welding pad are disconnected; and a detection circuit determines whether the housing is normally pressed through detecting the connection or disconnection between the first sensitive signal welding pad and the second sensitive signal welding pad.
Description
Technical field
The utility model relates to payment terminal security fields, relates in particular to a kind of safety switch of financial terminal.
Background technology
Tend to store the data message of some hypersensitivities in the electronic circuit of financial terminal product, as password and private key etc., but thereupon produced the safety problem of data message, the problem that is stolen as sensitive data more and more causes people's great attention.The financial terminal product is security consideration, generally needs design safety contact weld pad and shell tamper mechanism; In prior art, as shown in Figure 1, its safety contact pad comprises: sensitive signal input pad 91, and sensitive signal o pads 92, protection pad 93 ground connection, protection pad 94 connect power supply; Sensitive signal input pad 91 and o pads 92 are arranged on the inside of protection pad; General whole protection mechanism adopts carbon oil, conductive rubber etc. to be communicated with sensitive signal input pad 91 and o pads 92, the normal pressing of judgement shell; If the disengaging sensitive signal pad such as carbon oil, conductive rubber contact judges the improper pressing of shell.When the outside uses the injecting glue mode to attack, walk around the protection pad, utilize conductive glue to make sensitive signal input pad 91 and 92 conductings of sensitive signal o pads, even adopt carbon oil, conductive rubber to break away from sensitive signal o pads 91 or input pad 92 contacts, security mechanism is also destroyed, make success attack, steal sensitive data; The pad of safeguard protection simultaneously also lacks physical protection mechanism, has increased potential safety hazard, and the complete machine fail safe can not get good protection.
Summary of the invention
The purpose of this utility model is to increase the attack difficulty of outer bound pair financial terminal product, thereby has improved the fail safe of financial terminal complete machine.
The purpose of this utility model can be by following structure realization, and it comprises shell, is provided with metal clips and safety contact pad below described shell; Described safety contact pad comprises: the first protection pad, the second protection pad, the first sensitive signal pad and the second sensitive signal pad; Be provided with the first sensitive signal pad in described the first protection pad, be provided with the second protection pad in described the first sensitive signal pad, be provided with the second sensitive signal pad in described the second protection pad; Described metal clips is connected with the first sensitive signal pad soldering, and surrounds the first sensitive signal pad; Described safety contact pad is electrically connected to pad on protected circuit board; Described metal clips and the second sensitive signal pad Elastic Contact.
Be provided with rubber key between the crimping projection of described shell and metal clips.
Described the first protection pad ground connection, described the second protection pad connects power supply.
Described the first protection pad connects power supply, described the second protection pad ground connection.
Described the first protection pad, the second protection pad, the first sensitive signal pad and the second sensitive signal pad are closed frame or lap welding dish.
Adopt above structure, metal clips is communicated with the first sensitive signal pad and the second sensitive signal pad, and the sensitive signal pad is enclosed in metal clips, and the anti-effect of taking off of shell is played in the normal pressing of shell this moment simultaneously; If shell does not have normal pressing, this moment, metal clips takeoff, and the first sensitive signal pad and the second sensitive signal pad are and open circuit; Testing circuit conducting occurs or opens circuit by detecting between the first sensitive signal pad and the second sensitive signal pad, thereby judges whether normal pressing of shell; Rubber key can provide certain buffering, avoids metal clips to separate with the second sensitive signal pad, improves the crimping reliability; Utilize power supply signal to isolate sensitive signal input pad and o pads, the mode that extraneous injecting glue is attacked is infeasible, has increased the outside world difficulty, has played and has prevented taking off effect, thereby improved the fail safe of complete machine.
Description of drawings
Below in conjunction with the drawings and specific embodiments, the utility model is described in further details;
Fig. 1 is the structural representation of a kind of safety contact pad of prior art;
Fig. 2 is the structural representation of a kind of safety switch of the utility model;
Fig. 3 is the structural representation that the utility model is realized the safety switch electrical connection;
Fig. 4 is the utility model safety contact pad embodiment one structural representation;
Fig. 5 is the utility model safety contact pad embodiment two structural representations.
Specific embodiment party
As Fig. 2 or shown in Figure 3, it is arranged on the protected circuit board 8 that financial terminal produces, and with being electrically connected to of protected circuit board 8; It comprises shell 1 the utility model, and described shell 1 below is provided with metal clips 2 and safety contact pad; Described safety contact pad comprises: the first protection pad 3, the second protection pad 4, the first sensitive signal pad 5 and the second sensitive signal pad 6; The first sensitive signal pad 5 is that sensitive signal inputs or outputs pad, and the second sensitive signal pad 6 is sensitive signal output or input pad; Be provided with the first sensitive signal pad 5 in described the first protection pad 3 closed areas, be provided with the second protection pad 4 in described the first sensitive signal pad 5 closed areas, be provided with the second sensitive signal pad 6 in described the second protection pad 4 closed areas; Pad soldering corresponding on described safety contact pad and protected circuit board 8 connects; During shell 1 normal pressing, described metal clips 2 is connected with the first sensitive signal pad 5 solderings, and surround the first sensitive signal pad 5, prevent that metal clips 2 or other electric conducting materials are lifted, described metal clips 2 and the second sensitive signal pad 6 Elastic Contact, make the first sensitive signal pad 5 and the second sensitive signal 6 conductings, but metal clips 2 is to stride across the second protection pad 4; If shell 1 does not have normal pressing, metal clips 2 takeoffs, and the first sensitive signal pad 5 and the second sensitive signal pad 6 are and open circuit; Testing circuit on protected circuit board 8 being by detecting between the sensitive signal pad whether conducting or open circuit, thereby judge whether normally pressing of shell 1.
Described shell 1 is provided with crimping projection 11, and described crimping projection position 11 is directly over the second sensitive signal pad 6, so that pressing metal clips 2 contacts with the second sensitive signal pad 6 accurately.Be provided with rubber key 7 between the crimping projection 11 of described shell 1 and metal clips 2, the button of quality of rubber materials can be set on crimping projection 11, when shell 1 pressing, crimping projection 11 on shell is pressed metal clips 2 by rubber key 7 and is connected with the second sensitive signal pad 6, thereby improves the reliability of crimping.Two kinds of power supply access schemes will be arranged: with described the first protection pad 3 ground connection, described the second protection pad 4 connects power supply or described the first protection pad 3 connects power supply, described the second protection pad 4 ground connection; Utilize power protection signal isolation the first sensitive signal pad 5 and the second sensitive signal pad 6; when the external world attacks by injecting conductive glue; will touch the second protection pad 4; make the first sensitive signal pad 5, the second protection pad 4, the second sensitive signal protection pad 6 conductings simultaneously, thereby detection trigger circuit judges financial terminal product under fire.
As Fig. 4 or shown in Figure 5, described the first protection pad 3, the second protection pad 4, the first sensitive signal pad 5 and the second sensitive signal pad 6 are closed frame or lap welding dish.Can be according to the concrete technology demand, it can make the frame type pad or the circular ring type pad is connected with protected circuit board 8 solderings.
Claims (6)
1. safety switch, it is arranged on protected circuit board, and with being electrically connected to of protected circuit board, it is characterized in that: it comprises shell, described shell below is provided with metal clips and safety contact pad; Described safety contact pad comprises: the first protection pad, the second protection pad, the first sensitive signal pad and the second sensitive signal pad; Be provided with the first sensitive signal pad in described the first protection pad, be provided with the second protection pad in described the first sensitive signal pad, be provided with the second sensitive signal pad in described the second protection pad; Described metal clips is connected with the first sensitive signal pad soldering, and surrounds the first sensitive signal pad; Described safety contact pad is electrically connected to pad on protected circuit board; Described metal clips and the second sensitive signal pad Elastic Contact.
2. a kind of safety switch according to claim 1, it is characterized in that: described shell is provided with the crimping projection, described crimping projection be positioned at the second sensitive signal pad directly over.
3. a kind of safety switch according to claim 1 and 2, is characterized in that: be provided with rubber key between the crimping projection of described shell and metal clips.
4. a kind of safety switch according to claim 1 is characterized in that: described the first protection pad ground connection, described the second protection pad connects power supply.
5. a kind of safety switch according to claim 1 is characterized in that: described the first protection pad connects power supply, described the second protection pad ground connection.
6. a kind of safety switch according to claim 1 is characterized in that: described the first protection pad, the second protection pad, the first sensitive signal pad and the second sensitive signal pad are closed frame or lap welding dish.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220572880 CN202930277U (en) | 2012-10-31 | 2012-10-31 | Safety switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220572880 CN202930277U (en) | 2012-10-31 | 2012-10-31 | Safety switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202930277U true CN202930277U (en) | 2013-05-08 |
Family
ID=48220213
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220572880 Expired - Lifetime CN202930277U (en) | 2012-10-31 | 2012-10-31 | Safety switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202930277U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105956497A (en) * | 2016-04-25 | 2016-09-21 | 福建新大陆支付技术有限公司 | Safety anti-dismounting method for financial electronic device and structure thereof |
| CN107633972A (en) * | 2017-10-12 | 2018-01-26 | 百富计算机技术（深圳）有限公司 | A kind of construction of switch and electronic equipment |
| CN108024449A (en) * | 2017-11-16 | 2018-05-11 | 青岛海信移动通信技术股份有限公司 | FPC components and terminal device |
-
2012
- 2012-10-31 CN CN 201220572880 patent/CN202930277U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105956497A (en) * | 2016-04-25 | 2016-09-21 | 福建新大陆支付技术有限公司 | Safety anti-dismounting method for financial electronic device and structure thereof |
| CN107633972A (en) * | 2017-10-12 | 2018-01-26 | 百富计算机技术（深圳）有限公司 | A kind of construction of switch and electronic equipment |
| CN107633972B (en) * | 2017-10-12 | 2020-04-03 | 百富计算机技术（深圳）有限公司 | Switch structure and electronic equipment |
| CN108024449A (en) * | 2017-11-16 | 2018-05-11 | 青岛海信移动通信技术股份有限公司 | FPC components and terminal device |
| CN108024449B (en) * | 2017-11-16 | 2020-06-09 | 青岛海信移动通信技术股份有限公司 | FPC subassembly and terminal equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130508 |
|
| CX01 | Expiry of patent term |