Self-service bank privacy protection device
By using light emitting diodes and photosensitive diodes in self-service banks to detect bank card status and using heaters to quickly adjust keyboard temperature, the problem of user privacy detected by thermal sensing devices in high-intensity self-service banks is solved, achieving higher privacy and security Protect.
Patent Information
- Application Number
- CN202421038939.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-13
- Publication Date
- 2025-02-18
- Estimated Expiration
- 2034-05-13
AI Technical Summary
In high-intensity self-service banking, when the next user enters quickly after the user is completed, the heat cannot be dissipated immediately, resulting in the password information that may be detected by the thermal sensing device or SMOS chip, infringing on user privacy.
A self-service banking privacy protection device is designed, using light emitting diodes and photosensitive diodes to detect the insertion and removal status of the bank card, and heat the keyboard through a heater to quickly reduce the temperature difference between the keys, thereby protecting user privacy.
It effectively reduces the temperature difference between buttons, prevents heat from being detected externally, and improves users' privacy and security when using self-service banking.
Smart Images
Figure CN222506952U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of self-service bank security, in particular to a self-service bank privacy protection device. Background Art
[0002] Thanks to the development of self-service banking, the workload of staff has been greatly reduced.
[0003] When using self-service banking, users are most concerned about security issues, including bank card security, shielding glass strength and password security.
[0004] Among them, in order to solve the problem of password security, in the prior art, it is generally achieved by adding door lock prompts and setting up metal keyboards. The former is to prevent other people from entering the space of the self-service bank when the user is using it, and the latter is to increase the heat dissipation speed to prevent others from reading the numbers contained in the password through thermal sensing devices after the user leaves.
[0005] However, in actual application, in some high-intensity self-service banks, queues will occur. At this time, after a user finishes using the bank card, the next user will quickly enter the bank card, causing the heat to not be dissipated immediately. The numbers contained in the password can still be read by the thermal sensing device, and this phenomenon has become more serious as the SMOS chip that can detect infrared rays is used in more mobile phones.
[0006] Therefore, those skilled in the art are eager to further improve the privacy security of users when using self-service banking. Utility Model Content
[0007] The purpose of the utility model is to provide a self-service bank privacy protection device, which detects whether a bank card is inserted through a light-emitting diode and a photosensitive diode, and after the bank card is removed, the keyboard can be heated by a heater, thereby quickly reducing the temperature difference between the keys and protecting the user's privacy.
[0008] The purpose of the utility model can be achieved through the following technical solutions:
[0009] A self-service bank privacy protection device, comprising:
[0010] The light emitting diode and the photosensitive diode are arranged in the bank machine and are respectively located on both sides of the bank card insertion slot. When the bank card is inserted, the light emitted by the light emitting diode is blocked by the bank card. When the bank card is withdrawn, the photosensitive diode receives the light emitted by the light emitting diode.
[0011] Heaters, installed on the keyboard of banking machines;
[0012] The first relay has a coil connected in series with a photodiode;
[0013] A comparator and a second relay, wherein an output terminal of the comparator is connected in series with a coil of the second relay, a power input terminal is connected to a first low-voltage DC power supply, and a normally open contact of the second relay, a normally open contact of the first relay, and a heater are connected in series;
[0014] The first optical isolator has an input terminal connected in series with the photosensitive diode and an output terminal connected to the non-inverting input terminal of the comparator.
[0015] The device further comprises a second optical isolator and an energy storage capacitor, wherein the input end of the second optical isolator is connected in series with the photosensitive diode, and the output ends are respectively connected to the energy storage capacitor, and the energy storage capacitor is connected to the inverting input end of the comparator.
[0016] The positive electrode of the output end of the first optical isolator is connected to the positive electrode of the second low-voltage DC power supply, and the negative electrode is connected to the non-inverting input end of the comparator;
[0017] The positive electrode of the output end of the second optical isolator is connected to the positive electrode of the second low-voltage DC power supply, and the negative electrode is connected to the positive electrode of the energy storage capacitor. The negative electrode of the energy storage capacitor is connected to the negative electrode of the second low-voltage DC power supply, and the positive electrode is also connected to the inverting input end of the comparator.
[0018] A first voltage-dividing resistor is connected in series between the first optical isolator and the comparator.
[0019] A first current limiting resistor is provided between the energy storage capacitor and the negative electrode of the second low-voltage DC power supply.
[0020] The heater is a heating resistance wire.
[0021] The heating resistance wires are arranged close to the inner wall of the key, and all the heating resistance wires are arranged in parallel.
[0022] A second current limiting resistor is provided between the first relay and the photosensitive diode.
[0023] A third current limiting resistor is provided between the first optical isolator and the photosensitive diode.
[0024] The keyboard is a metal keyboard.
[0025] Compared with the prior art, the utility model has the following beneficial effects:
[0026] 1. Use light-emitting diodes and photosensitive diodes to detect whether a bank card is inserted. After the bank card is removed, the keyboard can be heated by a heater to quickly reduce the temperature difference between the keys and protect the user's privacy.
[0027] 2. By designing a second optical isolator and energy storage capacitor in conjunction with a comparator, the power supply to the heater can be cut off after the heater has worked for a period of time during the low period to avoid long-term heating.
[0028] 3. By designing the first voltage-dividing resistor, the voltage at the non-inverting input of the comparator can be appropriately reduced, thereby ensuring that the output of the comparator can be cut off after the energy storage capacitor is fully charged.
[0029] 4. The heating resistor wire is set close to the inner wall of the button, which improves the heat transfer efficiency on the one hand and reduces the probability of damage to the heating resistor wire when the button is pressed on the other hand. BRIEF DESCRIPTION OF THE DRAWINGS
[0030] Figure 1 It is a schematic diagram of the control circuit part of the utility model;
[0031] Figure 2 It is a schematic diagram of the primary circuit part;
[0032] Figure 3 It is a schematic diagram of the setting part of the heating resistance wire;
[0033] Figure 4 This is a schematic diagram of the keyboard cover opening;
[0034] Among them: 1, keyboard cover, 2, slide, 1-1, opening, K1, relay, K2, second relay, D1, light emitting diode, D2, photosensitive diode, VCC1, first low-voltage DC power supply, VCC2, second low-voltage DC power supply, VDD, power supply, U1, first optical isolator, U2, second optical isolator, U3, comparator, C1, energy storage capacitor, R1, fourth current limiting resistor, R2, second current limiting resistor, R3, third current limiting resistor, R4, first current limiting resistor, R5, first voltage dividing resistor, R6, grounding resistor, R7, fifth current limiting resistor, R8, discharge resistor, RX1~RX3 are heating resistor wires. DETAILED DESCRIPTION
[0035] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.
[0036] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.
[0037] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "proximal", "distal", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. Physical quantities in formulas, if not separately marked, should be understood as basic quantities of the International System of Units, or derived quantities derived from basic quantities through mathematical operations such as multiplication, division, differentiation or integration.
[0038] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.
[0039] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0040] In conjunction with the accompanying drawings, some embodiments of the present invention are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.
[0041] A self-service bank privacy protection device, such as Figure 1 and Figure 2 As shown, including:
[0042] The light emitting diode D1 and the photosensitive diode D2 are arranged in the bank machine and are respectively located on both sides of the bank card insertion slot. When the bank card is inserted, the light emitted by the light emitting diode D1 is blocked by the bank card. When the bank card is withdrawn, the photosensitive diode D2 receives the light emitted by the light emitting diode D1.
[0043] Heaters, installed on the keyboard of banking machines;
[0044] The first relay K1, the coil is connected in series with the photodiode D2;
[0045] A comparator U3 is connected to a second relay K2, an output end of the comparator U3 is connected in series with a coil of the second relay K2, a power input end is connected to a first low-voltage DC power supply VCC1, and a normally open contact of the second relay K2, a normally open contact of the first relay K1, and a heater are connected in series;
[0046] The first optical isolator U1 has an input end connected in series with the photodiode D2 , and an output end connected to the non-inverting input end of the comparator U3 .
[0047] The light emitting diode D1 and the photosensitive diode D2 are used to detect whether a bank card is inserted. After the bank card is removed, the keyboard can be heated by the heater, thereby quickly reducing the temperature difference between the keys and protecting the user's privacy.
[0048] However, when the bank card is inserted, the optical fiber is blocked, the photodiode D2 is in the disconnected state, the coil of the first relay K1 is not energized, and the normally open contact is in the disconnected state, so the heater is not energized and does not work.
[0049] When the bank card is pulled out from the inserted state, at this time, due to the withdrawal of the bank card, the photosensitive diode D2 receives the light emitted by the light-emitting diode D1 and is in the on state, the coil of the first relay K1 is energized, in the attracted state, the normally open contact is turned on, and the first optical isolator U1 on the other side is also in the on state. At this time, the input of the positive input terminal of the comparator U3 is a high level. In some embodiments, since the comparator U3 is grounded, the comparator U3 will output a high level, the coil of the second relay K2 is energized, the normally open contact is turned on, and the heater will start working. Therefore, through the operation of the heater, the temperature of the keyboard can be increased to increase the external heat radiation and heat conduction, and the temperature difference between the keys caused by the user entering the password can be quickly reduced.
[0050] In most embodiments, the device further includes a second optical isolator U2 and an energy storage capacitor C1. The input end of the second optical isolator U2 is connected in series with the photodiode D2, and the output end is respectively connected to the energy storage capacitor C1. The energy storage capacitor C1 is connected to the inverting input end of the comparator U3.
[0051] By designing the second optical isolator U2 and the energy storage capacitor C1 in conjunction with the comparator U3, the power supply to the heater can be cut off after the heater has worked for a period of time during the low period to avoid prolonged heating.
[0052] Specifically, the positive electrode of the output end of the first optical isolator U1 is connected to the positive electrode of the second low-voltage DC power supply VCC2, and the negative electrode is connected to the non-inverting input end of the comparator U3; the positive electrode of the output end of the second optical isolator U2 is connected to the positive electrode of the second low-voltage DC power supply VCC2, and the negative electrode is connected to the positive electrode of the energy storage capacitor C1, the negative electrode of the energy storage capacitor C1 is connected to the negative electrode of the second low-voltage DC power supply VCC2, and the positive electrode is also connected to the inverting input end of the comparator U3.
[0053] In this way, when the bank card is pulled out from the inserted state, the second optical isolator U2 is turned on. At the beginning, since the energy storage capacitor C1 is not fully charged, the energy storage capacitor C1 is in a charging state, the comparator U3 outputs a high level, the coil of the second relay K2 is energized, and the normally open contact is turned on, so the heater will start to work. However, when the energy storage capacitor C1 is full, the comparator U3 outputs a low level, and the coil of the second relay K2 is not energized at this time. Although the first relay K1 is energized, the heater is in a non-energized and non-working state because the second relay K2 is not energized. This solves the problem that the heater is still in a working state when no one uses it for a long time.
[0054] Generally, in some embodiments, a first voltage-dividing resistor R5 is connected in series between the first optical isolator U1 and the comparator U3. By designing the first voltage-dividing resistor R5, the voltage at the non-inverting input terminal of the comparator U3 can be appropriately reduced, thereby ensuring that the output of the comparator U3 can be cut off after the energy storage capacitor C1 is fully charged.
[0055] In addition, in almost all embodiments configured with the second optical isolator U2 and the energy storage capacitor C1, a first current limiting resistor R4 is provided between the energy storage capacitor C1 and the negative electrode of the second low-voltage DC power supply VCC2, and a discharge resistor R8 can be provided in series with the energy storage capacitor. In this way, when the user uses a bank machine and inserts a bank card, the second optical isolator U2 is disconnected, and the energy storage capacitor can be discharged through the discharge resistor R8 to restore to a low charge state, so that when the bank card is pulled out next time, the second relay K2 can be normally attracted.
[0056] In some embodiments, the heater is a heating resistor wire, such as Figure 3 As shown, the heating resistance wire is set close to the inner wall of the key, and all the heating resistance wires are set in parallel. Among them, the keyboard is a metal keyboard, and the specific setting form of the heating resistance wire can be one or more. Specifically, in this embodiment, one wire is used, which can be set on the inner side of the key cover of a key located at the edge. Therefore, by heating this key cover, the temperature of other keys is affected by heat conduction, so that no matter how the temperature difference of each key is, a distribution with this key as the center and the temperature gradually decreasing to the surrounding area can be formed, which interferes with the use of the thermal imaging device and protects the privacy of the user.
[0057] Of course, in other embodiments, other forms may also be used, such as Figure 2 In the embodiment, a plurality of heating resistor wires may be provided, such as RX1 to RX3 in FIG. 1 , and may be provided on different key covers.
[0058] In addition, the wiring of the heating resistor wire can be done by opening a hole 1-1 on the side of the key cover 1, and setting a slide 2 on the side of the bracket on which the key cover 1 is set for the wire to pass through. Since this part is existing technology, it will not be repeated here.
[0059] Under normal circumstances, a second current limiting resistor R2 is provided between the first relay K1 and the photosensitive diode D2. Similarly, a third current limiting resistor R3 is provided between the first optical isolator U1 and the photosensitive diode D2, and the light-emitting diode D1 can also be connected in series with a fourth current limiting resistor R1. The coil of the second relay K2 can be grounded through a grounding resistor R6, and a fifth current limiting resistor R7 can also be connected in series to the loop formed by the normally open contact of the second relay K2, the normally open contact of the first relay K1, and the heater.
Claims
1. A self-service bank privacy protection device, characterized in that: include: The light emitting diode and the photosensitive diode are arranged in the bank machine and are respectively located on both sides of the bank card insertion slot. When the bank card is inserted, the light emitted by the light emitting diode is blocked by the bank card. When the bank card is withdrawn, the photosensitive diode receives the light emitted by the light emitting diode. Heaters, installed on the keyboard of banking machines; The first relay has a coil connected in series with a photodiode; A comparator and a second relay, wherein an output terminal of the comparator is connected in series with a coil of the second relay, a power input terminal is connected to a first low-voltage DC power supply, and a normally open contact of the second relay, a normally open contact of the first relay, and a heater are connected in series; The first optical isolator has an input terminal connected in series with the photosensitive diode, and an output terminal connected to the non-inverting input terminal of the comparator.
2. A self-service bank privacy protection device according to claim 1, characterized in that: The device further comprises a second optical isolator and an energy storage capacitor, wherein the input end of the second optical isolator is connected in series with the photosensitive diode, and the output ends are respectively connected to the energy storage capacitor, and the energy storage capacitor is connected to the inverting input end of the comparator.
3. A self-service bank privacy protection device according to claim 2, characterized in that: The positive electrode of the output end of the first optical isolator is connected to the positive electrode of the second low-voltage DC power supply, and the negative electrode is connected to the non-inverting input end of the comparator; The positive electrode of the output end of the second optical isolator is connected to the positive electrode of the second low-voltage DC power supply, and the negative electrode is connected to the positive electrode of the energy storage capacitor. The negative electrode of the energy storage capacitor is connected to the negative electrode of the second low-voltage DC power supply, and the positive electrode is also connected to the inverting input end of the comparator.
4. A self-service bank privacy protection device according to claim 3, characterized in that: A first voltage-dividing resistor is connected in series between the first optical isolator and the comparator.
5. A self-service bank privacy protection device according to claim 3, characterized in that: A first current limiting resistor is provided between the energy storage capacitor and the negative electrode of the second low-voltage DC power supply.
6. A self-service bank privacy protection device according to claim 1, characterized in that: The heater is a heating resistance wire.
7. A self-service bank privacy protection device according to claim 6, characterized in that: The heating resistance wires are arranged close to the inner wall of the key, and all the heating resistance wires are arranged in parallel.
8. A self-service bank privacy protection device according to claim 1, characterized in that: A second current limiting resistor is provided between the first relay and the photosensitive diode.
9. A self-service bank privacy protection device according to claim 1, characterized in that: A third current limiting resistor is provided between the first optical isolator and the photosensitive diode.
10. The self-service bank privacy protection device according to claim 1, characterized in that: The keyboard is a metal keyboard.