CN208462130U - A kind of through-hole pcb board secure line via hole protection structure - Google Patents

Abstract

The utility model provides a kind of through-hole pcb board secure line via hole protection structure, through-hole pcb board is the pcb board of through-hole, the pcb board is equipped with secure line wiring region, secure line is equipped in the secure line wiring region, the secure line includes via hole, metal dome, center ring, side ring and mutual exclusion ring, the center ring, side ring and mutual exclusion ring are spaced concentric ring from inside to outside, the metal dome is placed on the side ring, it is contacted after the metal dome central point pressing with center ring, center ring and side ring is connected, the via hole is set between the side ring and center ring.The via hole of the utility model protects structure, guarantees the stability of electrical connection, while improving the attack tolerant of tamper contact, reduces pcb board layer needs, reduces production cost.

Description

A kind of through-hole pcb board secure line via hole protection structure

Technical field

The utility model relates to the financial security such as the protection field of electronic circuit more particularly to financial transaction, e-payment The through-hole pcb board secure line via hole in field protects structure.

Background technique

Electronic product is widely applied in financial transaction at present, and the route that information security is related on the pcb board of equipment is disliked The attacker that anticipates is implanted into interception facility, or circuit is distorted in implantation, then when password is inputted on human-computer interaction device as client, password It can be stolen by attacker, therefore, how protect the line security of pcb board, be allowed to be not implanted into external circuit maliciously, be pcb board One research direction of manufacturing process.The via hole protected mode of existing ventilating hole plate secure line, it is blind to usually use multi-layer PCB Buried via hole (HDI) plate is arranged metal grill in the two sides PCB layer of layer where needing secure line wiring via hole to be protected, makes to attack The person of hitting is difficult to touch via hole, but in this method, the region where metal mesh is not used to be routed, and increases the layer of pcb board Number increases manufacturing cost.

Summary of the invention

The technical problems to be solved in the utility model is to provide a kind of through-hole pcb board secure line via hole protection structure, Guarantee the stability of electrical connection, while improving the attack tolerant of tamper contact, reduces pcb board layer needs, reduce production Cost.

The utility model is realized in this way: a kind of through-hole pcb board secure line via hole protection structure, including it is equipped with through-hole Pcb board, the pcb board is equipped with secure line wiring region, equipped with secure line, the peace in the secure line wiring region Full line includes via hole, metal dome, center ring, side ring and mutual exclusion ring, the center ring, side ring and mutual exclusion ring be from inside to outside between Every the concentric ring of setting, the metal dome is placed on the side ring, is contacted after the metal dome central point pressing with center ring, Center ring and side ring is connected, the via hole is set between the side ring and center ring.

Further, insulating layer ink is covered on the via hole.

Further, the secure line carries the circuitry self test of circuit with pcb board or the guidance of safety circuit function is connected, Circuitry self test and the guidance of safety circuit function are unable to complete when secure line is attacked or distorted, and trigger security mechanism.

Further, the protection structure further includes that at least one layer of metal mesh, the metal mesh are arranged on the pcb board The external one attack circuit for detecting for being detected to the electrical characteristics of metal mesh, and occur one detecting metal mesh electrical characteristics Start attack-defending measure when tentering degree changes.

Utility model has the advantages that

1, the protection via hole mode based on metal dome, metal dome pad perfection consider protected hole site excessively, are not easy It is attacked, has highly difficult attack tolerant having metal dome formula tamper contact, and guarantee that the stabilization of electrical connection (avoids contact with Via hole)；

2, the setting of mutual exclusion ring can effectively prevent conducting liquid to inject and lead to the problem of breaking-proof switch short circuit, improve to resist and attack Hit ability；

3, safe coiling is substituted using metal dome protected mode, reduces pcb board layer and need (protection via hole), is effectively reduced Production cost；

4, protected via hole is centrally disposed between tactile disk and ring, under pressing state, will not be contacted with metal dome In connection.

5, via hole covers one layer of dielectric ink, will not connect with metal dome.

Detailed description of the invention

The utility model is further described in conjunction with the embodiments with reference to the accompanying drawings.

Fig. 1 is a kind of through-hole pcb board structural schematic diagram of the utility model.

Fig. 2 is that a kind of through-hole pcb board secure line via hole of the utility model protects knot of the structure in not set metal dome Structure schematic diagram.

Fig. 3 is the sectional view that a kind of through-hole pcb board secure line via hole of the utility model protects structure.

Specific embodiment

As shown in Figure 1 to Figure 3, a kind of through-hole pcb board secure line via hole of the utility model protects structure, including is equipped with The pcb board 10 of through-hole, the pcb board 10 are equipped with secure line wiring region, are equipped with safety line in the secure line wiring region Road, the secure line include via hole 21, metal dome 22, center ring 23, side ring 24 and mutual exclusion ring 25, the center ring 23, side Ring 24 and mutual exclusion ring 25 are spaced concentric ring from inside to outside, and the metal dome 22 is placed on the side ring 24, described It is contacted after the pressing of 22 central point 221 of metal dome with center ring 23, conducting center ring 23 and side ring 24, the via hole 21 are set to described Between side ring 24 and center ring 23.

Preferably, being covered with insulating layer ink on the via hole 21, the contact of via hole with metal dome 22 is further prevented.

Preferably, the secure line carries the circuitry self test of circuit with pcb board or the guidance of safety circuit function is connected, electricity Road self-test and the guidance of safety circuit function (are such as opened) in metal dome when secure line is attacked or distorted and are unable to complete, and touch Send out security mechanism.

Preferably, the protection structure further includes that at least one layer of metal mesh 30, the metal mesh are arranged on the pcb board The 30 external one attack circuit for detecting for being detected to the electrical characteristics of metal mesh, and occur detecting metal mesh electrical characteristics Start attack-defending measure when certain amplitude changes, under normal circumstances, metal dome masking is only set to the one of secure line wiring region The other side of side, the secure line wiring region is protected by metal mesh, and one layer of PCB is separated between the metal mesh and secure line Substrate layer 40 will destroy the electrical characteristics of metal mesh if attacker destroys metal mesh, and attack circuit for detecting detects metal mesh Electrical characteristics transmission think under attack when being widely varied, further start attack-defending measure, such as power-off, alert Deng so that attacker is unable to complete attack.

A kind of through-hole pcb board secure line via hole of the utility model protects structure, is by the secure line in pcb board In wiring region encapsulation include metal dome, center ring, side ring and mutual exclusion ring secure line, the via hole of the pcb board is located at center Between ring and side ring, the metal dome is placed on the side ring, and pressing metal dome center makes metal dome center in Thimble contact, is connected center ring and side ring, and the via hole is shielded in below metal dome and does not contact with metal dome；The safety line Road and PCB carry the circuitry self test of circuit or the guidance of safety circuit function connects, and the circuitry self test and safety circuit function are drawn It leads and is unable to complete when secure line is attacked or distorted, to trigger security mechanism；

The materials such as the easy conductives such as copper can be used in the material of the center ring, side ring and mutual exclusion ring.

In order to further enhance security performance, at least one layer of metal mesh is set on the pcb board, the metal mesh is external The one attack circuit for detecting for being detected to the electrical characteristics of metal mesh (such as resistance, whether be connected), and detecting Metal mesh electrical characteristics occur to start attack-defending measure when certain amplitude variation, and under normal circumstances, metal dome masking is only set to peace The other side of the side of full line wiring region, the secure line wiring region is protected by metal mesh, the metal mesh and safety line It is separated with a floor pcb board floor between road, if attacker destroys metal mesh, the electrical characteristics of metal mesh, attack detecting electricity will be destroyed The electrical characteristics transmission that road detects metal mesh thinks under attack when being widely varied, and further starts attack-defending measure, So that attacker is unable to complete attack.

Protection via hole mode of the utility model based on metal dome, metal dome pad perfection consider protected hole location excessively It sets, is not easy to be attacked, while having metal dome formula tamper contact has highly difficult attack tolerant, and guarantee electrical connection Stablize (avoiding contact with via hole)；The setting of mutual exclusion ring can effectively prevent conducting liquid to inject and lead to asking for breaking-proof switch short circuit Topic improves anti-attack ability；Safe coiling protection is substituted using metal dome protected mode, pcb board layer needs is reduced, effectively drops Low production cost；Protected via hole is centrally disposed between tactile disk and ring, under pressing state, will not be contacted with metal dome In connection.

Although those familiar with the art answers the foregoing describe specific embodiment of the present utility model Working as understanding, we are merely exemplary described specific embodiment, rather than for the limit to the scope of the utility model Fixed, those skilled in the art modification and variation equivalent made by the spirit according to the utility model all should Cover in the scope of the claimed protection of the utility model.

Claims (4)

1. a kind of through-hole pcb board secure line via hole protects structure, it is characterised in that: the pcb board including being equipped with through-hole, it is described Pcb board is equipped with secure line wiring region, is equipped with secure line in the secure line wiring region, the secure line included Hole, metal dome, center ring, side ring and mutual exclusion ring, the center ring, side ring and mutual exclusion ring are spaced concentric from inside to outside Ring, the metal dome are placed on the side ring, are contacted after metal dome central point pressing with center ring, conducting center ring with Side ring, the via hole are set between the side ring and center ring.

2. a kind of through-hole pcb board secure line via hole according to claim 1 protects structure, it is characterised in that: the mistake Insulating layer ink is covered on hole.

3. a kind of through-hole pcb board secure line via hole according to claim 1 protects structure, it is characterised in that: the peace Full line carries the circuitry self test of circuit with pcb board or the guidance of safety circuit function is connected, circuitry self test and safety circuit function Guidance is unable to complete when secure line is attacked or distorted, and triggers security mechanism.

4. a kind of through-hole pcb board secure line via hole according to claim 1 protects structure, it is characterised in that: the guarantor Protection structure further includes that at least one layer of metal mesh is arranged on the pcb board, and the metal mesh external one is used for the electricity to metal mesh The attack circuit for detecting that characteristic is detected, and starting attack is anti-when detecting metal mesh electrical characteristics and certain amplitude variation occurring Model measure.