CN214279092U - Anti-dismantling alarm case - Google Patents
Anti-dismantling alarm case Download PDFInfo
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- CN214279092U CN214279092U CN202120413831.7U CN202120413831U CN214279092U CN 214279092 U CN214279092 U CN 214279092U CN 202120413831 U CN202120413831 U CN 202120413831U CN 214279092 U CN214279092 U CN 214279092U
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Abstract
The utility model discloses a prevent tearing open alarm machine case, including the case shell, take the micro-gap switch of actuating lever and prevent tearing open the circuit, when the case shell was closed, press micro-gap switch's actuating lever and make micro-gap switch open, micro-gap switch's actuating lever bullet was opened when the case was unpacked apart, and micro-gap switch is closed, triggers to prevent tearing open circuit and reports to the police and the disconnection quick-witted incasement electrical equipment's power. The utility model discloses a based on to the control of electromagnetic relay switch, cooperation power supply control circuit, alarm circuit realize physics unpacking warning and outage function, when the case shell was opened the operation illegally, quick-witted incasement electricity stop work immediately, send the alarm sound simultaneously, can reduce information leakage risk, avoid the operation such as artificial illegal tear open, unpacking.
Description
Technical Field
The utility model relates to an equipment safety field, concretely relates to prevent tearing open alarm box.
Background
In recent years, with the development of semiconductor and network technologies, audio and video transmission capability is improved, and the volume of audio and video transmission equipment is smaller and smaller, which brings great challenges to information leakage prevention. In the field of security protection, the prevention of abnormal opening of electrical equipment and the placement of monitoring equipment are important precautionary items.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at preventing that electrical equipment from being destroyed by physics unpacking or putting into and eavesdrop monitoring equipment such as candid photograph, preventing information leakage.
In order to achieve the purpose, the utility model provides a tamper alarm case, which comprises a case shell, a microswitch with a driving rod and a tamper circuit, wherein when the case shell is closed, the driving rod of the microswitch is pressed to open the microswitch, when the case is detached, the driving rod of the microswitch is flicked, the microswitch is closed, and the tamper circuit is triggered to alarm and disconnect the power supply of the electric equipment in the case;
the anti-disassembly circuit comprises an alarm circuit and a power supply control circuit, the power supply control circuit controls the power supply of the electrical equipment in the case, the power supply control circuit comprises an input end, a control end and an output end, an external power supply is connected with the input end of the power supply control circuit, and the control end controls the output end to be connected with or disconnected from the external power supply;
the alarm circuit includes the battery, the fuse, the diode, the triode, micro-gap switch, the alarm, first resistance, the second resistance, the diode is anodal to battery positive pole connection, the negative pole of diode is connected to the external power supply input, the projecting pole of triode and the one end of fuse, triode source electrode and projecting pole are connected respectively to first resistance both ends, the one end of second resistance is connected to the source electrode of triode, the other end of fuse and micro-gap switch's one end is connected to the other end of second resistance, and connect power supply control circuit's control end, micro-gap switch's the other end is connected to the negative pole of battery, the positive pole of alarm is connected after triode collecting electrode and the source electrode link to each other, the negative pole of battery is connected to the negative pole of alarm.
Furthermore, the case shell is a hexahedron and comprises a front cover plate and an upper cover plate, the rest four sides are integrally bent and welded, the case can be disassembled to open the front cover plate or open the upper cover plate, when the front cover plate and the upper cover plate are installed, a microswitch with a driving rod is firstly placed, the driving rod is in a pressing state, and at the moment, the microswitch is in an opening state; when the front cover plate or the upper cover plate is opened, the corresponding driving rod is caused to bounce, the micro switch is closed, the anti-disassembly circuit is triggered to alarm, and the power supply of the electrical equipment in the case is disconnected.
Furthermore, when the microswitch is closed, the positive electrode and the negative electrode of the battery are communicated with two ends of the fuse, so that the current in the fuse is increased instantly, the fuse is blown, and the audio and video signal unidirectional isolation transmission device has no power supply input, thereby ensuring that the equipment cannot supply power and cannot work normally; the positive and negative electrodes of the battery are respectively communicated with the base electrode and the emitter electrode of the triode and enter a saturated state, the collector electrode and the emitter electrode are conducted, and at the moment, the alarm is communicated with the positive and negative electrodes of the battery, so that the alarm gives an alarm.
Further, the power supply control circuit is a relay switch.
Advantageous effects
The utility model discloses a based on to the control of electromagnetic relay switch, cooperation power supply control circuit, alarm circuit realize physics unpacking warning and outage function, when the case shell was opened the operation illegally, quick-witted incasement electricity stop work immediately, send the alarm sound simultaneously, can reduce information leakage risk, avoid the operation such as artificial illegal tear open, unpacking.
Drawings
Fig. 1 is a perspective view of the tamper alarm case of the present invention.
Fig. 2 is a perspective view of the open state of the tamper alarm case of the present invention.
Fig. 3 is the circuit schematic diagram of the anti-dismantling alarm case of the utility model.
Fig. 4 is the power supply control circuit schematic diagram of the anti-dismantling alarm case of the utility model.
Fig. 5 is the alarm circuit schematic diagram of the anti-dismantling alarm case of the utility model.
Detailed Description
The following describes in detail embodiments of the present invention with reference to the accompanying drawings.
The utility model discloses a reduce information leakage risk, avoid the people for operations such as illegal machine of tearing open, unpacking, specially set up the quick-witted case and prevented tearing open alarm circuit and prevent tearing open the structure. When the case shell is illegally opened, the electric equipment in the electric equipment case in the case stops working immediately and gives out alarm sound.
The utility model discloses prevent tearing open alarm box, include casing, micro-gap switch 2 and prevent tearing open warning circuit. Referring to fig. 1 and 2, the housing of the embodiment of the present invention is a hexahedron, which includes an upper cover plate 3, a front cover plate 4, and the rest four sides 1, which are integrally bent and welded, and when the front cover plate and the upper cover plate are disassembled, the front cover plate can only be opened or the upper cover plate can only be opened, and when the front cover plate and the upper cover plate are installed, the micro switch 2 with the driving rod is first placed, and the driving rod is in a pressing state, and at this time, the micro switch is in an opening state; when the front cover plate or the upper cover plate is opened, the corresponding driving rod is caused to bounce, and the micro switch is closed. The five positions of fig. 1 and 2 are provided with the micro switches, and the number and the positions of the micro switches can be adjusted as long as the case can be sensed to be disassembled.
As shown in fig. 3, the micro switch is connected to a tamper circuit, which includes an alarm circuit and a power supply control circuit, and the power supply control circuit controls the power supply of the electrical device in the case. In the specific embodiment of the present invention, the 12VIN is an external 12V power supply of the device. The whole power supply of the circuit needs to be output through the control of the power supply control circuit, and the power supply control circuit is realized by adopting a relay switch. As shown in fig. 4, the overall POWER supply of the electrical equipment in the chassis is determined by the input signal FUSE _ POWER of the control terminal 1 pin of the POWER supply control circuit, and when the input voltage of the pin is "high", the output terminal of the relay switch outputs a 12V POWER supply to supply POWER to the overall circuit of the electrical equipment in the chassis. When the input voltage of the pin is low, the output end of the relay switch has no output voltage, and the whole circuit of the power supply control circuit is powered off and stops working.
As shown in fig. 5, the alarm circuit includes a battery, a FUSE, a diode D1, a transistor Q1 (in the figure, a PNP transistor), a micro switch X1, a micro switch X2 (when two or more micro switches are provided, the micro switch X2 may represent a plurality of switches other than the micro switch X1), a battery X3, an alarm U1, a first resistor R1, and a second resistor R2. The specific arrangement of the micro-switch can be the arrangement in the mode of fig. 1 and 2, and can also be other modes capable of detecting the opening of the chassis shell. The positive pole of diode is connected to the battery positive pole, external POWER supply input end connects the negative pole of diode, the projecting pole of triode and the first end of FUSE, triode source electrode and projecting pole are connected respectively to first resistance both ends, the first end of second resistance is connected to the source electrode of triode, the second end of second resistance is connected the second end of FUSE and micro-gap switch's first end, and connect POWER control circuit's POWER control end FUSE _ POWER, micro-gap switch's second end is connected to the negative pole of battery, the positive pole of alarm is connected after triode collecting electrode and the source electrode link to each other, the negative pole of battery is connected to the negative pole of alarm.
When the electrical equipment in the case is in a normal POWER supply working state, the external POWER supply 12VIN is connected to the control end FUSE _ POWER of the POWER supply control circuit through the FUSE, and is at a high level, so that the circuit is normally powered, and the equipment is in a normal working state. When the casing of the equipment case is illegally opened, namely the upper cover or the front cover is opened, the micro switch in the case is triggered, so that the driving rod of the micro switch is bounced to open, and the switches X1 and X2 are closed. At this time, the diode D1 is turned on, and the positive and negative electrodes of the battery are communicated with the two ends of the FUSE, so that the current in the FUSE is increased instantly, the FUSE is blown, and no voltage is input into the FUSE _ POWER of the control end of the relay switch, thereby ensuring that the device cannot work normally due to lack of POWER supply. And the positive and negative electrodes of the battery are respectively communicated with the base electrode and the emitting electrode of the Q1 triode, the Q1 enters a saturated state, the collecting electrode and the emitting electrode are conducted, and at the moment, the alarm is communicated with the positive and negative electrodes of the battery, so that the buzzer alarms, and the alarm can be stopped until the electric quantity of the battery is exhausted.
When the electrical equipment in the case is not input by an external power supply, the microswitch is closed if the case is illegally disassembled in the state. At the moment, the diode D1 is also conducted, the positive electrode and the negative electrode of the battery are communicated with the two ends of the fuse, so that the current in the fuse is increased instantly, the fuse is blown, the power input of the audio and video signal unidirectional isolation transmission device is invalid, and the equipment cannot be started when the power is subsequently switched on, so that the equipment cannot normally work after being illegally opened; and the positive and negative electrodes of the battery are respectively communicated with the base electrode and the emitting electrode of the Q1 triode, the Q1 enters a saturated state, the collecting electrode and the emitting electrode are conducted, and at the moment, the alarm is communicated with the positive and negative electrodes of the battery, so that the alarm gives an alarm.
The above is only a preferred embodiment of the present invention, and should not be limited to the invention, any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. An anti-disassembly alarm case is characterized by comprising a case shell, a microswitch with a driving rod and an anti-disassembly circuit, wherein when the case shell is closed, the driving rod of the microswitch is pressed to open the microswitch, when the case is disassembled, the driving rod of the microswitch is bounced open, the microswitch is closed, the anti-disassembly circuit is triggered to alarm and the power supply of electrical equipment in the case is disconnected;
the anti-disassembly circuit comprises an alarm circuit and a power supply control circuit, the power supply control circuit controls the power supply of the electrical equipment in the case, the power supply control circuit comprises an input end, a control end and an output end, an external power supply is connected with the input end of the power supply control circuit, and the control end controls the output end to be connected with or disconnected from the external power supply;
the alarm circuit includes the battery, the fuse, the diode, the triode, micro-gap switch, the alarm, first resistance, the second resistance, the diode is anodal to battery positive pole connection, the negative pole of diode is connected to the external power supply input, the projecting pole of triode and the one end of fuse, triode source electrode and projecting pole are connected respectively to first resistance both ends, the one end of second resistance is connected to the source electrode of triode, the other end of fuse and micro-gap switch's one end is connected to the other end of second resistance, and connect power supply control circuit's control end, micro-gap switch's the other end is connected to the negative pole of battery, the positive pole of alarm is connected after triode collecting electrode and the source electrode link to each other, the negative pole of battery is connected to the negative pole of alarm.
2. The tamper-evident alarm case of claim 1, wherein the case is a hexahedron including a front cover plate and an upper cover plate, and the remaining four sides are integrally bent and welded, and the case can be disassembled to open only the front cover plate or the upper cover plate, and when the front cover plate and the upper cover plate are installed, the micro switch with the driving rod is first placed and the driving rod is in a pressed state, and the micro switch is in an opened state; when the front cover plate or the upper cover plate is opened, the corresponding driving rod is caused to bounce, the micro switch is closed, the anti-disassembly circuit is triggered to alarm, and the power supply of the electrical equipment in the case is disconnected.
3. The tamper alarm case according to claim 1 or 2, wherein when the microswitch is closed, the positive and negative electrodes of the battery are communicated with the two ends of the fuse, so that the current in the fuse is instantly increased, the fuse is blown, and the audio/video signal unidirectional isolation transmission device has no power input, thereby ensuring that the equipment cannot supply power and cannot normally work; the positive and negative electrodes of the battery are respectively communicated with the base electrode and the emitter electrode of the triode and enter a saturated state, the collector electrode and the emitter electrode are conducted, and at the moment, the alarm is communicated with the positive and negative electrodes of the battery, so that the alarm gives an alarm.
4. The tamper-evident alarm cabinet of claim 1 or 2, wherein the power control circuit is a relay switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120413831.7U CN214279092U (en) | 2021-02-25 | 2021-02-25 | Anti-dismantling alarm case |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120413831.7U CN214279092U (en) | 2021-02-25 | 2021-02-25 | Anti-dismantling alarm case |
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| Publication Number | Publication Date |
|---|---|
| CN214279092U true CN214279092U (en) | 2021-09-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120413831.7U Active CN214279092U (en) | 2021-02-25 | 2021-02-25 | Anti-dismantling alarm case |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114296567A (en) * | 2021-12-29 | 2022-04-08 | 中孚信息股份有限公司 | Anti-dismantling circuit for KVM unidirectional switching device and operation method |
-
2021
- 2021-02-25 CN CN202120413831.7U patent/CN214279092U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114296567A (en) * | 2021-12-29 | 2022-04-08 | 中孚信息股份有限公司 | Anti-dismantling circuit for KVM unidirectional switching device and operation method |
| CN114296567B (en) * | 2021-12-29 | 2023-12-22 | 中孚信息股份有限公司 | Anti-disassembly circuit for KVM unidirectional switching device and operation method |
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