CN208781361U - Structure, code keyboard and electronic transaction device are protected in self-destruction - Google Patents

Abstract

The utility model discloses a kind of self-destructions to protect structure, code keyboard and electronic transaction device, the code keyboard includes key panel and mainboard, mainboard is equipped with self-destruction switch and main control chip, self-destruction protects structure setting between key panel and mainboard, it includes: the first flexible circuit layer and the second flexible circuit layer being cascading from the key panel to mainboard direction that structure is protected in self-destruction, the first flexible circuit layer and the second flexible circuit layer are respectively equipped with self-destruction protection circuit, when self-destruction protection circuit is damaged, output protection signal to self-destruction switchs, data are eliminated to control main control chip.The utility model, which passes through, protects structure setting for two layers of flexible circuit layer the self-destruction; and two layers of flexible circuit layer is provided with self-destruction protection circuit respectively; its high safety and reliability; and solves the existing self-destruction protection structure using four layers of flexible circuit layer; the design cost of its circuit is high, it is difficult to the problem of realizing batch production.

Description

Structure, code keyboard and electronic transaction device are protected in self-destruction

Technical field

The utility model relates to electronic transaction device technical field, in particular to structure, code keyboard are protected in a kind of self-destruction And electronic transaction device.

Background technique

The code keyboard of the electronic transaction devices such as POS machine, automatic teller machine, the input and sensitive information that carry bank password add Therefore close processing work is stored with the working key and master key of bank in the core processing part of keyboard.Some criminals Often keyboard is taken or spied by sled to steal the bank password of user, or even interpret the working key and master key of bank, to reach To the wild ambition for stealing bank data, the safety of user and bank data and fund is directly threatened.

In order to eliminate this security risk, the code keyboard of the prior art is usually between key panel and mainboard contact surface Structure is protected equipped with self-destruction, when code keyboard destruction under attack, self-destruction protection structure can trigger main control chip self-destruction, main core Sensitive data in piece can auto-destruct.

However, current self-destruction protection structure generallys use two layers of flexible circuit layer, and flexible circuit bottom is provided with one layer Labyrinth circuit, by detecting whether labyrinth circuit is damaged judge whether electronic transaction device is under attack, but due to Therefore still there is the possibility of missing inspection in only one layer of labyrinth circuit；In addition a kind of self-destruction protection structure uses four layers of flexible circuit Layer, and then the interior three-layer set in four layers of flexible circuit layer has labyrinth circuit, there are the design cost of circuit height for this mode, very Hardly possible realizes the problem of batch production.

Utility model content

The main purpose of the utility model is to propose a kind of self-destruction protection structure, it is intended to be solved existing using four layers of flexible circuit The self-destruction protection structure of layer is difficult to realize the problem of producing in batches there are the design cost of circuit height.

To achieve the above object, the utility model proposes a kind of self-destructions to protect structure, is applied to code keyboard, the cryptographic key Disk includes key panel and mainboard, and the mainboard is equipped with self-destruction switch and main control chip, the self-destruction protection structure setting in Between the key panel and mainboard, the self-destruction protection structure includes: to stack gradually from the key panel to mainboard direction The the first flexible circuit layer and the second flexible circuit layer being arranged, the first flexible circuit layer and the second flexible circuit layer are respectively equipped with self-destruction guarantor Protection circuit, when the self-destruction protection circuit is damaged, output protection signal to self-destruction is switched, and is eliminated with controlling the main control chip Data.

Optionally, the self-destruction protection circuit is the labyrinth being layed on the first flexible circuit layer and the second flexible circuit layer Circuit.

Optionally, the second flexible circuit level is provided with tie point to the mainboard side, and is close to the tie point It is provided with the first electric conductor, the position that the mainboard corresponds to first electric conductor is provided with the second electric conductor, and described second is soft Circuit layer and the mainboard pass through tie point, the first electric conductor and the second conductive body contact to be electrically connected.

Optionally, the first flexible circuit layer and the second flexible circuit layer corresponding position are provided with via hole, are passed through by conducting wire Self-destruction protection circuit on the first flexible circuit layer and the self-destruction on the second flexible circuit layer are protected circuit and institute by the via hole State tie point connection.

Optionally, the tie point is the contact on the second flexible circuit layer, and the contact is rounded, and diameter is 0.1-0.3 millimeters；Or the contact is square, side length is 0.1-0.3 millimeters.

Optionally, the via hole face self-destruction switch setting.

Optionally, the surface portion of the first flexible circuit layer is laid with or is paved with the self-destruction protection circuit；

The surface portion of the second flexible circuit layer is laid with or is paved with the self-destruction protection circuit.

Optionally, the self-destruction switchs the second flexible circuit layer position of correspondence and is provided with oneself that the self-destruction switch is completely covered Ruin protection circuit.

The utility model also proposes a kind of code keyboard, which includes key panel and mainboard, and is set to Structure is protected in self-destruction between the key panel and mainboard, which is characterized in that the self-destruction protection structure includes: set on described The first flexible circuit layer and the second flexible circuit layer between key panel and mainboard, the first flexible circuit layer, the second flexible circuit layer It is connected in series with the mainboard, surface of the mainboard towards the second flexible circuit layer is switched equipped with self-destruction, the first soft electricity Road floor and the second flexible circuit floor are equipped with self-destruction and protect circuit.

The utility model also proposes that a kind of electronic transaction device, the electronic transaction device include cryptographic key as described above Disk.

The utility model, which passes through, protects structure setting for two layers of flexible circuit layer the self-destruction, and respectively in two layers of flexible circuit layer It is provided with self-destruction protection circuit, compared to the existing self-destruction protection mechanism using four layers of flexible circuit layer, the design cost of circuit is low, And it may be implemented to produce in batches.

Detailed description of the invention

In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor Under, the structure that can also be shown according to these attached drawings obtains other attached drawings.

Fig. 1 is the structural schematic diagram that one embodiment of circuit is protected in the utility model self-destruction.

Drawing reference numeral explanation:

Label	Title	Label	Title
				10	First flexible circuit layer	70	First electric conductor
20	Second flexible circuit layer	100	Code keyboard
				30	Self-destruction switch	200	Structure is protected in self-destruction
40	Via hole	300	Mainboard
				50	Contact point	101	Key panel
60	Second electric conductor	310	Main control chip

The embodiments will be further described with reference to the accompanying drawings for the realization, functional characteristics and advantage of the utility model aim.

Specific embodiment

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describing, it is clear that described embodiment is only a part of the embodiment of the utility model, rather than all Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work premise Under every other embodiment obtained, fall within the protection scope of the utility model.

It is to be appreciated that if related in the utility model embodiment directionality instruction (such as upper and lower, left and right, it is preceding, Afterwards ...), then directionality instruction is only used for explaining opposite between each component under a certain particular pose (as shown in the picture) Positional relationship, motion conditions etc., if the particular pose changes, directionality instruction is also correspondingly changed correspondingly.

In addition, if relating to the description of " first ", " second " etc. in the utility model embodiment, " first ", " the Two " etc. description is used for description purposes only, and is not understood to indicate or imply its relative importance or is implicitly indicated meaning The quantity of the technical characteristic shown." first " is defined as a result, the feature of " second " can explicitly or implicitly include at least one A this feature.It in addition, the technical solution between each embodiment can be combined with each other, but must be with ordinary skill Based on personnel can be realized, this technical side will be understood that when the combination of technical solution appearance is conflicting or cannot achieve The combination of case is not present, also not within the protection scope of the requires of the utility model.

The utility model proposes a kind of self-destructions to protect structure 200, is applied to the electronic transaction devices such as POS machine or automatic teller machine In.

Referring to Fig.1, the utility model proposes a kind of self-destructions to protect structure 200, is applied to code keyboard 100, the cryptographic key Disk 100 include key panel 101 and mainboard 300, the mainboard 300 be equipped with self-destruction switch 30 and main control chip 310, it is described oneself It ruins protection structure 200 to be set between the key panel 101 and mainboard 300, which is characterized in that structure is protected in the self-destruction 200 include: the first flexible circuit layer 10 and the second soft electricity being cascading from the key panel 101 to 300 direction of mainboard Road floor 20, the first flexible circuit layer 10 and the second flexible circuit layer 20 be respectively equipped with self-destruction protection circuit (not shown), it is described from Protection circuit is ruined when being damaged, output protection signal to self-destruction switch 30, to control the elimination of main control chip 310 data.

It is provided with main control chip 310 in mainboard 300, is stored with sensitive data in main control chip 310, such as user account, Encrypted message, when there is criminal, by sled, to take or spy code keyboard 100 quick in 300 main control chip 310 of mainboard to steal When feeling data, the self-destruction switch 30 of self-destruction protection structure 200 can be triggered so that its internal sensitivity of 310 auto-destruct of main control chip Data avoid sensitive data from being stolen, and realize 310 self-destruction of main control chip of mainboard 300.

In the present embodiment, self-destruction protection structure 200 is set as two layers of flexible circuit layer, and in two layers of flexible circuit layer surface point Not She You self-destruction protect circuit, protect structure compared to the existing self-destruction using two layers flexible circuit, but bottom is only provided with one layer Self-destruction protect circuit scheme, the utility model proposes self-destruction protection 200 security reliability of structure it is stronger, can be by high-level Secure authentication testing greatly reduces a possibility that code keyboard is broken；And four layers of flexible circuit are used compared to existing Self-destruction protect structure, the utility model proposes self-destruction protection 200 circuit design of structure it is simple, and can produce in batches.

Specifically, from key panel 101 to mainboard 300, by direction from top to down, self-destruction protection structure 200 is successively set There are the first flexible circuit layer 10 and two flexible circuit layers 20, and is respectively equipped on the first flexible circuit layer 10 and two flexible circuit layers 20 respectively Circuit is protected in self-destruction, in this way, will lead to open circuit and then triggering self-destruction switch when criminal attacks key panel 101 30, so as to cause 310 self-destruction of main control chip in mainboard 300, criminal is made to be difficult to break through self-destruction protection structure 200 and steal Sensitive data onto mainboard main control chip 310.

Wherein, self-destruction protection circuit is the route of a coiling, which does not intersect, and its head and the tail respectively with master control As soon as the output pin of chip 310 connects to form a circuit with input pin, when the disconnection under attack of the route of this connection It can be monitored by main control chip 310, main control chip 310 then can self-destruction.

In order to improve security reliability, the utility model self-destruction protects circuit that will use labyrinth circuit, and labyrinth circuit is one Route detours by the method in labyrinth, the beginning and end of the labyrinth circuit respectively with the output pin of main control chip 310 and input Foot connects to form a circuit, when this connection route disconnection under attack will be monitored by main control chip 310, master control core Piece 310 then can self-destruction.Since the closeness of labyrinth circuit around the home is bigger, so that being less susceptible to be broken.

Referring to figure one, in an alternative embodiment, the second flexible circuit layer 20 is provided in face of 300 side of mainboard Tie point 50, and be close to the tie point 50 and be provided with the first electric conductor 70, corresponding first electric conductor 70 of the mainboard 300 Position be provided with the second electric conductor 60, the second flexible circuit layer 20 and the mainboard 300 are conductive by tie point 50, first Body 70 and the contact of the second electric conductor 60 are to be electrically connected.

It is to be appreciated that the in structure 200 is protected in self-destruction after code keyboard 100 assembles self-destruction protection structure 200 Two flexible circuit layers 20, tie point 50 and the first electric conductor 70 are contacted with the second electric conductor 60 of mainboard 300.

Referring to Fig.1, in an alternative embodiment, the first flexible circuit layer 10 and 20 corresponding position of the second flexible circuit layer are set It is equipped with via hole 40, it is soft by the first flexible circuit layer 10 self-destruction protection circuit and second to pass through the via hole 40 by conducting wire Self-destruction protection circuit on circuit layer 20 is connect with the tie point 50.

Further, the first flexible circuit layer 10 and the second flexible circuit layer 20 are provided with the via hole 40.

In order to further increase security reliability, the 40 face self-destruction switch 30 of via hole is arranged the utility model.And The self-destruction protection circuit that the self-destruction switch 30 is completely covered is provided in corresponding second flexible circuit layer, 20 position of self-destruction switch 30, To prevent switch to be cracked, the safeguard protection degree of self-destruction protection structure 200 is improved.

Since the aperture of via hole 40 is greater than the diameter of route, criminal is readily available the via hole 40 and breaks through, this Technical solution considerably increases the difficulty being broken, improves this by the way that via hole 40 to be arranged in the right opposite of self-destruction switch 30 The security reliability of self-destruction protection structure 200.

Referring to Fig.1, in an alternative embodiment, the tie point 50 is the touching on the second flexible circuit layer 20 Point, the contact is rounded, and diameter is 0.1-0.3 millimeters；Or the contact is square, side length is 0.1-0.3 millimeters.

In the present embodiment, the shape of tie point can be designed to round, square or other shapes, the ruler of tie point 50 It is very little to be designed as 0.1-0.3mm the side length of square (circular diameter or), after the first flexible circuit layer 10 is broken, the can be encountered Circuit is protected in self-destruction in two flexible circuit layers, is only not provided with self-destruction protection circuit in the tie point 50 having a size of 0.1-0.3mm, To be difficult to be attacked.Because the size of tie point 50 is small, one layer of solid conduction body or silk-screen are mounted on tie point 50 One layer of liquid conduction body, i.e. the first electric conductor 70, corresponding first electric conductor 70 is provided with the second electric conductor 60 on mainboard 300, The contacting points position that structure 200 and mainboard 300 are protected in self-destruction can be expanded by this design, to ensure that structure is protected in self-destruction 200 are reliably connected with mainboard 300.

Referring to Fig.1, in an alternative embodiment, the surface portion of the first flexible circuit layer is laid with or is paved with the self-destruction Protect circuit；

The surface portion of the second flexible circuit layer is laid with or is paved with the self-destruction protection circuit.

In practical applications, it is found that the position of the first flexible circuit layer 10 and two flexible circuit layers 20 under fire is frequent only In specific region, so in order to save circuit cost, can only the first flexible circuit layer 10 and two flexible circuit layers 20 often by The sensitizing range part of attack is laid with self-destruction and protects circuit；It certainly, for safety, can also be in the first flexible circuit layer 10 and two Flexible circuit layer 20 is paved with self-destruction protection circuit.

The utility model also proposes a kind of code keyboard, which includes key panel 101 and mainboard 300, with And it is set to the self-destruction protection structure 200 between key panel 101 and mainboard 300.The detailed construction of self-destruction protection structure 200 It can refer to above-described embodiment, details are not described herein again；It is understood that due to having used above-mentioned self-destruction in code keyboard 100 Structure 200 is protected, therefore, the embodiment of code keyboard 100 includes whole skills of above-mentioned self-destruction protection 200 whole embodiments of structure Art scheme, and technical effect achieved is also identical, details are not described herein.

The above is only the preferred embodiment of the present invention, and therefore it does not limit the scope of the patent of the utility model, Under all utility models in the utility model are conceived, equivalent structure made based on the specification and figures of the utility model Transformation, or directly/be used in other related technical areas indirectly and be included in the scope of patent protection of the utility model.

Claims (10)

1. structure is protected in a kind of self-destruction, it is applied to code keyboard, which includes key panel and mainboard, on the mainboard Equipped with self-destruction switch and main control chip, between the key panel and mainboard, feature exists the self-destruction protection structure setting In, self-destruction protection structure include: the first flexible circuit layer being cascading from the key panel to mainboard direction and Second flexible circuit layer, the first flexible circuit layer and the second flexible circuit layer are respectively equipped with self-destruction protection circuit, the self-destruction protection When circuit is damaged, output protection signal to self-destruction is switched, and eliminates data to control the main control chip.

2. structure is protected in self-destruction as described in claim 1, which is characterized in that the self-destruction protection circuit is to be layed in described the Labyrinth circuit on one flexible circuit layer and the second flexible circuit layer.

3. structure is protected in self-destruction as described in claim 1, which is characterized in that the second flexible circuit level is to the mainboard one Side is provided with tie point, and is close to the tie point and is provided with the first electric conductor, and the mainboard corresponds to first electric conductor Position is provided with the second electric conductor, the second flexible circuit layer and the mainboard and is led by tie point, the first electric conductor and second Electric body contact is to be electrically connected.

4. structure is protected in self-destruction as claimed in claim 3, which is characterized in that the first flexible circuit layer and the second flexible circuit layer Corresponding position is provided with via hole, passes through the via hole by conducting wire and circuit and the are protected in the self-destruction on the first flexible circuit layer Self-destruction protection circuit on two flexible circuit layers is connect with the tie point.

5. structure is protected in self-destruction as claimed in claim 4, which is characterized in that the tie point is set on second flexible circuit Contact on layer, the contact is rounded, and diameter is 0.1-0.3 millimeters；Or the contact is square, side length 0.1- 0.3 millimeter.

6. structure is protected in self-destruction as claimed in claim 5, which is characterized in that the via hole face self-destruction switch setting.

7. structure is protected in self-destruction as described in claim 1, which is characterized in that the surface portion of the first flexible circuit layer is laid with Or it is paved with the self-destruction protection circuit；

The surface portion of the second flexible circuit layer is laid with or is paved with the self-destruction protection circuit.

8. a kind of code keyboard, which is characterized in that the code keyboard includes key panel, mainboard and self-destruction protection structure, institute Mainboard is stated equipped with self-destruction switch and main control chip, the self-destruction protects structure setting between the key panel and mainboard, The self-destruction protection structure is that structure is protected in self-destruction of any of claims 1-7 such as.

9. the code keyboard as described in right wants 8, which is characterized in that the position of the corresponding second flexible circuit layer of self-destruction switch It installs and is equipped with the self-destruction protection circuit that the self-destruction switch is completely covered.

10. a kind of electronic transaction device, which is characterized in that the electronic transaction device includes password as claimed in claim 9 Keyboard.