CN214429454U - Computer safety arrangement - Google Patents
Computer safety arrangement Download PDFInfo
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- CN214429454U CN214429454U CN202120795768.8U CN202120795768U CN214429454U CN 214429454 U CN214429454 U CN 214429454U CN 202120795768 U CN202120795768 U CN 202120795768U CN 214429454 U CN214429454 U CN 214429454U
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Abstract
The utility model relates to a computer safety arrangement, including the computer power, computer main power supply line and start control circuit, computer main power supply line includes two power start branch roads, first power start branch road cluster is equipped with the normally open contact switch and the starting resistance of first relay, second power start branch road cluster is equipped with the time delay of getting to the electricity switch on contact switch of first time relay, start control circuit includes manual starting switch, first start control branch road and second start control branch road, first start control branch road cluster is equipped with the control coil of first relay and the time delay of getting to the electricity switch off contact switch of first time relay, second start control branch road cluster is equipped with the control coil of first time relay. When the computer is started and electrified, the starting resistor is put into use, the starting resistor can prevent the supply current from being very large, the impact of the large current on the computer power supply at the moment of starting and electrifying is avoided, the damage of the computer power supply due to overcurrent is prevented, and the safe operation of the computer is ensured.
Description
Technical Field
The utility model relates to a computer safety arrangement.
Background
When the computer is started, an operator operates the power switch to be conducted, the external power supply circuit is communicated with the power supply of the computer, and the computer runs by power. The computer power supply is a direct current electric energy conversion circuit and is used for converting direct current of an external power supply circuit into direct current required by the computer. At the moment of electrifying the computer, the computer power supply can immediately input electric energy with higher current, the starting mode can cause impact on the computer power supply, and the computer power supply can be damaged by overcurrent, thereby influencing the safe operation of the computer.
SUMMERY OF THE UTILITY MODEL
In order to solve the security problem in the computer starting process, the utility model provides a computer safety arrangement can carry out reliable safety protection to the computer starting process.
A computer safety protection device comprises a computer power supply and further comprises:
the computer main power supply circuit comprises a first power supply starting branch and a second power supply starting branch which are arranged in parallel, the input end of the first power supply starting branch is used for being connected with an external power supply circuit, the output end of the first power supply starting branch is connected with the computer power supply, the first power supply starting branch is provided with a normally open contact switch and a starting resistor of a first relay in series, and the second power supply starting branch is provided with an electricity-obtaining delay conducting contact switch of a first time relay in series;
the starting control circuit comprises a manual starting switch and a parallel control circuit, wherein the manual starting switch and the parallel control circuit are arranged in series, the parallel control circuit comprises a first starting control branch and a second starting control branch, the first starting control branch is arranged in parallel, the first starting control branch is arranged in series, a control coil of a first relay and an electricity-obtaining delay disconnection contact switch of the first time relay are arranged, and the second starting control branch is arranged in series, and the control coil of the first time relay is arranged in series.
Furthermore, the computer main power supply line further comprises a voltage division branch, a switch tube, a voltage-stabilizing tube and a charging capacitor, wherein the input end of the voltage division branch and the input end of the switch tube are used for being connected with the external power supply line, the output end of the voltage division branch is grounded, the voltage division end of the voltage division branch is connected with the control end of the switch tube, the control end of the switch tube is grounded through the voltage-stabilizing tube, the voltage-stabilizing tube is connected with the charging capacitor in parallel, and the output end of the switch tube is connected with the input end of the first power supply starting branch.
Furthermore, a first fuse is further arranged in the first power supply starting branch in series, and a second fuse is further arranged in the second power supply starting branch in series.
Furthermore, the computer safety protection device further comprises an electric energy conversion circuit and a computer power supply monitoring device, wherein the input end of the electric energy conversion circuit is connected with the output end of the first power supply starting branch, and the output end of the electric energy conversion circuit is connected with the computer power supply monitoring device and used for supplying power to the computer power supply monitoring device.
Furthermore, the computer power supply monitoring device comprises a voltage sensor, a temperature sensor, a first voltage comparator, a first temperature comparator, a first overvoltage alarm circuit and a first overtemperature alarm circuit;
the voltage sensor is used for detecting the output voltage of the computer power supply, the voltage sensor is connected with a first input end of the first voltage comparator, a second input end of the first voltage comparator is used for inputting a first comparison voltage signal, and an output end of the first voltage comparator is connected with the first overvoltage alarm circuit;
the temperature sensor is used for detecting the temperature of the computer power supply, the temperature sensor is connected with a first input end of the first temperature comparator, a second input end of the first temperature comparator is used for inputting a first comparison temperature signal, and an output end of the first temperature comparator is connected with the first over-temperature alarm circuit.
Furthermore, the computer power supply monitoring device also comprises a second voltage comparator, a second temperature comparator, a second overvoltage alarm circuit and a second overtemperature alarm circuit;
the voltage sensor is connected with a first input end of the second voltage comparator, a second input end of the second voltage comparator is used for inputting a second comparison voltage signal, and an output end of the second voltage comparator is connected with the second overvoltage alarm circuit; the first comparison voltage signal is less than the second comparison voltage signal;
the temperature sensor is connected with a first input end of the second temperature comparator, a second input end of the second temperature comparator is used for inputting a second comparison temperature signal, and an output end of the second temperature comparator is connected with the second over-temperature alarm circuit; the first comparison temperature signal is less than the second comparison temperature signal.
The utility model provides a computer safety arrangement's technological effect includes: the manual starting switch of operation switches on, first start control branch road and second start control branch road get electric, the control coil of first relay and the control coil of first time relay get electric, the normally open contact switch of first relay switches on, the starting resistance drops into, and second power starts the branch road and is in the off-state, when the time delay time that first time relay corresponds arrives, the time delay disconnection contact switch disconnection that gets electric of first time relay, the control coil of first relay loses electricity, the normally open contact switch disconnection of first relay, the time delay that gets electric of first time relay switches on the contact switch and switches on, first power starts the branch road and withdraws from, the second power starts the branch road and drops into. Therefore, when the computer is started and powered on, the starting resistor is put in, the power supply current is not very large due to the action of the starting resistor, the impact of large current on a computer power supply at the moment of starting and powering on is avoided, the computer power supply is prevented from being damaged due to overcurrent, the safe operation of the computer is ensured, the starting resistor is only put in for a certain time, and then the normal power supply branch circuit is normally switched to, so that the safe and stable operation of the computer is ensured.
Drawings
FIG. 1 is a circuit diagram of a computer main power supply line of a computer security protection device;
FIG. 2 is a circuit diagram of the startup control circuitry of the computer security device;
FIG. 3 is a block diagram of a voltage monitoring section in the computer power supply monitoring device;
fig. 4 is a structural diagram of a temperature monitoring portion in the computer power supply monitoring device.
Detailed Description
The embodiment provides a computer safety protection device, which comprises a computer power supply, a computer main power supply circuit and a starting control circuit.
The computer power supply is an electric energy conversion device for converting direct current in an external power supply line into direct current required by the computer, such as a conventional computer switching power supply.
As shown in fig. 1, the main power supply line of the computer includes a first power starting branch and a second power starting branch which are arranged in parallel. The input end of the first power supply starting branch is used for being connected with an external power supply circuit, namely the input end of the second power supply starting branch is also used for being connected with the external power supply circuit. The output end of the first power supply starting branch is used for being connected with a computer power supply, namely the output end of the second power supply starting branch is also used for being connected with the computer power supply.
The first power starting branch is provided with a normally open contact switch S1 and a starting resistor R1 of a first relay in series, and a first fuse F1 is further arranged in the first power starting branch in series in order to improve the power supply safety of the first power starting branch. The first relay is a conventional relay device, the normally open contact switch S1 is controlled by a control coil T1 of the first relay, and the conduction state of the normally open contact switch S1 is correspondingly controlled according to the power-on state of the control coil T1. The starting resistor R1 may be a conventional resistor, the resistance of which is set by the actual need.
The second power supply starting branch is provided with an electric delay conducting contact switch S2 of the first time relay in series. The first time relay is conventional time relay equipment, and correspondingly controls the conducting state of the power-on delay conducting contact switch S2 according to the power-on state of a control coil T2 of the first time relay. The switch type of the power-on delay conducting contact switch S2 is a normally open contact switch, when the control coil T2 is not powered on, the power-on delay conducting contact switch S2 is in a disconnected state, when the control coil T2 is powered on, the power is started from the control coil T2 for timing, and when the delay time comes, the power-on delay conducting contact switch S2 is conducted. Wherein the delay time is set by actual requirements. In order to improve the power supply safety of the first power supply starting branch, a second fuse F2 is also arranged in series in the second power supply starting branch.
When a computer is powered on, pulse spike voltage may exist in an external power supply line at the moment of power-on, and the pulse spike voltage may damage the computer power supply. Therefore, in this embodiment, the main power supply line of the computer further includes a voltage dividing branch, a switching tube Q1, a voltage regulator tube D1, and a charging capacitor C1.
The voltage dividing branch comprises a voltage dividing resistor R2 and a voltage dividing resistor R3, the voltage dividing resistor R2 and the voltage dividing resistor R3 are arranged in series, and then the connection point of the voltage dividing resistor R2 and the voltage dividing resistor R3 is the voltage dividing end of the voltage dividing branch. It should be understood that the magnitude of the resistance values and the relationship between the resistance values of the voltage dividing resistor R2 and the voltage dividing resistor R3 are set according to actual requirements, for example, the direct current of an external power supply line and the conducting voltage of the control end of the switching tube Q1. The switching transistor Q1 is a conventional switching transistor device, such as an NPN transistor, an N MOS transistor, etc. The voltage regulator tube D1 is a conventional voltage regulator diode, and the voltage regulator value of the voltage regulator tube D1 is the conducting voltage of the control end of the switch tube Q1. The charging capacitor C1 is a conventional capacitor, and the capacitance value is set by actual needs.
As shown in fig. 1, the input end of the voltage dividing branch and the input end of the switching tube Q1 are used for connecting an external power supply line, the output end of the voltage dividing branch is grounded, the voltage dividing end of the voltage dividing branch is connected with the control end of the switching tube Q1, the control end of the switching tube Q1 is grounded through a voltage regulator tube D1, the voltage regulator tube D1 is connected in parallel with the charging capacitor C1, that is, the control end of the switching tube Q1 is also grounded through the charging capacitor C1. The output end of the switching tube Q1 is connected to the input end of the first power supply starting branch. Then, at the moment of power-up, the voltage dividing branch performs voltage division, but due to the charging function of the charging capacitor C1, during the charging process of the charging capacitor C1, the control end voltage of the switching tube Q1 is smaller than the conducting voltage, the switching tube Q1 is not conducting, and the direct current in the external power supply line cannot be output through the switching tube Q1. When the voltage of the charging capacitor C1 reaches the conduction voltage of the switch tube Q1, the switch tube Q1 is conducted, direct current in an external power supply line can be output through the switch tube Q1, the pulse spike voltage can be prevented from being output immediately at the moment of electrification, and the pulse spike voltage is prevented from damaging a computer power supply.
As shown in fig. 2, the start control circuit includes a manual start switch SB1 and a parallel control circuit, the parallel control circuit includes a first start control branch and a second start control branch, the first start control branch is provided with a control coil T1 and an electric-conduction time-delay break contact switch S3 of the first time relay in series, and the second start control branch is provided with a control coil T2 in series. The manual activation switch SB1 may be a conventional push button switch, or a knife switch. And correspondingly controlling the conducting state of the power-on delay disconnection contact switch S3 according to the power-on state of the control coil T2. The switch type of the power-on time-delay off-contact switch S3 is a normally closed contact switch, when the control coil T2 is not powered on, the power-on time-delay off-contact switch S3 is in a conducting state, when the control coil T2 is powered on, power is supplied from the control coil T2 for timing, and when the time delay time comes, the power-on time-delay off-contact switch S3 is turned off.
Initially, the normally open contact switch S1 and the power-on delay opening contact switch S2 are opened, and the power-on delay opening contact switch S3 is opened. The manual starting switch SB1 of manual operation switches on, and control coil T1 and control coil T2 get electric, and normally open contact switch S1 switches on, and starting resistance R1 drops into, and first power starts the branch circuit and drops into promptly, and first time delay relay begins the timing. When the delay time comes, the power-on delay conducting contact switch S2 is conducted, namely the second power supply starting branch is switched on, the power-on delay disconnecting contact switch S3 is disconnected, the control coil T1 loses power, the normally open contact switch S1 is disconnected, the first power supply starting branch is withdrawn, and starting is completed.
In this embodiment, as shown in fig. 1, the computer safety protection device further includes an electric energy conversion circuit and a computer power supply monitoring device, an input end of the electric energy conversion circuit is connected to an output end of the first power supply starting branch, and an output end of the electric energy conversion circuit is connected to the computer power supply monitoring device, and is configured to supply power to the computer power supply monitoring device. The electric energy conversion circuit is used for converting the electric energy at the output end of the first power supply starting branch circuit into the electric energy required by the computer power supply monitoring device, and can be a conventional boosting circuit or a conventional voltage reduction circuit. The computer power supply monitoring device is used for monitoring the computer power supply and ensuring the safe operation of the computer power supply.
In this embodiment, the computer power supply monitoring device includes a voltage sensor, a temperature sensor, a first voltage comparator, a first temperature comparator, a first overvoltage alarm circuit, and a first overtemperature alarm circuit.
The voltage sensor is used for detecting the output voltage of the computer power supply and can be a conventional direct current voltage detection device. The first voltage comparator and the first temperature comparator are both conventional comparator devices, can compare signals input by the two input ends, and output a high level signal or a low level signal according to a comparison result. The first overvoltage alarm circuit and the first overtemperature alarm circuit may be conventional alarm circuits, such as circuits provided with alarms in series, or alarms controlled by input high-level or low-level signals, and the alarms alarm when receiving the high-level signals.
As shown in fig. 3, the voltage sensor is connected to a first input terminal of the first voltage comparator, a second input terminal of the first voltage comparator is used for inputting a first comparison voltage signal U1, and an output terminal of the first voltage comparator is connected to the first overvoltage alarm circuit. In this embodiment, when the voltage signal of the first input terminal of the first voltage comparator is greater than the first comparison voltage signal U1, the output terminal of the first voltage comparator outputs a high level signal; when the voltage signal of the first input terminal of the first voltage comparator is less than the first comparison voltage signal U1, the output terminal of the first voltage comparator outputs a low level signal.
In this embodiment, in order to obtain a more specific voltage abnormality degree of the computer power supply, the computer power supply monitoring device further includes a second voltage comparator and a second overvoltage alarm circuit. As shown in fig. 3, the voltage sensor is connected to a first input terminal of the second voltage comparator, a second input terminal of the second voltage comparator is used for inputting a second comparison voltage signal U2, the first comparison voltage signal U1 is smaller than the second comparison voltage signal U2, and an output terminal of the second voltage comparator is connected to the second overvoltage alarm circuit. The first comparison voltage signal U1 and the second comparison voltage signal U2 may be provided by a dedicated power supply device, or may be provided by a dedicated voltage dividing line, where the voltage dividing line is formed by connecting at least two voltage dividing resistors in series, one end of the voltage dividing line is connected to the dedicated power supply device, the other end of the voltage dividing line is grounded, and the first comparison voltage signal U1 and the second comparison voltage signal U2 are connected from different voltage dividing resistors. It should be understood that the specific values of the first comparison voltage signal U1 and the second comparison voltage signal U2 are set by actual requirements.
Since the first comparison voltage signal U1 is less than the second comparison voltage signal U2, if the voltage signal detected by the voltage sensor is less than the first comparison voltage signal U1, both the first voltage comparator and the second voltage comparator output low level signals; if the voltage signal detected by the voltage sensor is greater than the first comparison voltage signal U1 and less than the second comparison voltage signal U2, the first voltage comparator outputs a high level signal, and the second voltage comparator outputs a low level signal; if the voltage signal detected by the voltage sensor is greater than the second comparison voltage signal U2, the first voltage comparator and the second voltage comparator both output high level signals. Correspondingly, if the output end of the first voltage comparator outputs a high level signal, the first overvoltage alarm circuit operates, namely alarms, and if the output end of the first voltage comparator outputs a low level signal, the first overvoltage alarm circuit does not operate, namely does not alarm; if the output end of the second voltage comparator outputs a high level signal, the second overvoltage alarm circuit alarms, and if the output end of the second voltage comparator outputs a low level signal, the second overvoltage alarm circuit does not alarm.
The temperature sensor is used for detecting the temperature of the computer power supply, and can be a conventional temperature detection device, such as a contact temperature sensor, directly adhered to the shell of the computer power supply. As shown in fig. 4, the temperature sensor is connected to a first input terminal of the first temperature comparator, a second input terminal of the first temperature comparator is used for inputting a first comparison temperature signal W1, and an output terminal of the first temperature comparator is connected to the first over-temperature alarm circuit. Since the temperature signal detected by the temperature sensor is also a voltage signal in nature, the first comparison temperature signal W1 is a corresponding comparison voltage signal. In this embodiment, when the temperature signal of the first input terminal of the first temperature comparator is greater than the first comparison temperature signal W1, that is, when the voltage signal corresponding to the temperature signal of the first input terminal of the first temperature comparator is greater than the comparison voltage signal corresponding to the first comparison temperature signal W1, the output terminal of the first temperature comparator outputs a high level signal; when the temperature signal at the first input terminal of the first temperature comparator is less than the first comparison temperature signal W1, the output terminal of the first temperature comparator outputs a low level signal.
In the same way as the voltage detection, in this embodiment, in order to obtain a more specific temperature abnormal degree of the computer power supply, the computer power supply monitoring device further includes a second temperature comparator and a second over-temperature alarm circuit. As shown in fig. 4, the temperature sensor is connected to a first input terminal of the second temperature comparator, a second input terminal of the second temperature comparator is used for inputting a second comparison temperature signal W2, the first comparison temperature signal W1 is smaller than the second comparison temperature signal W2, and an output terminal of the second temperature comparator is connected to the second over-temperature alarm circuit. When the temperature signal of the first input end of the second temperature comparator is greater than the second comparison temperature signal W2, the output end of the second temperature comparator outputs a high level signal; when the temperature signal at the first input terminal of the second temperature comparator is less than the second comparison temperature signal W2, the output terminal of the second temperature comparator outputs a low level signal.
Since the first comparison temperature signal W1 and the second comparison temperature signal W2 are voltage signals, the first comparison temperature signal W1 and the second comparison temperature signal W2 can be obtained by the above-mentioned obtaining manner of the first comparison voltage signal U1 and the second comparison voltage signal U2. It should be understood that the specific values of the voltage signals corresponding to the first comparative temperature signal W1 and the second comparative temperature signal W2 are also set by actual requirements.
If the output end of the first temperature comparator outputs a high level signal, the first over-temperature alarm circuit gives an alarm, and if the output end of the first temperature comparator outputs a low level signal, the first over-temperature alarm circuit does not give an alarm. If the output end of the second temperature comparator outputs a high level signal, the second over-temperature alarm circuit gives an alarm, and if the output end of the second temperature comparator outputs a low level signal, the second over-temperature alarm circuit does not give an alarm.
Therefore, if the voltage signal detected by the voltage sensor is smaller than the first comparison voltage signal U1, the first voltage comparator and the second voltage comparator both output low level signals, and neither the first overvoltage alarm circuit nor the second overvoltage alarm circuit alarms; if the voltage signal detected by the voltage sensor is greater than the first comparison voltage signal U1 and less than the second comparison voltage signal U2, the first voltage comparator outputs a high level signal, the second voltage comparator outputs a low level signal, the first overvoltage alarm circuit alarms, and the second overvoltage alarm circuit does not alarm; if the voltage signal detected by the voltage sensor is greater than the second comparison voltage signal U2, the first voltage comparator and the second voltage comparator both output high level signals, and the first overvoltage alarm circuit and the second overvoltage alarm circuit both alarm. If the temperature signal detected by the temperature sensor is smaller than a first comparison temperature signal W1, the first temperature comparator and the second temperature comparator both output low level signals, and the first over-temperature alarm circuit and the second over-temperature alarm circuit do not alarm; if the temperature signal detected by the temperature sensor is greater than a first comparative temperature signal W1 and less than a second comparative temperature signal W2, the first temperature comparator outputs a high level signal, the second temperature comparator outputs a low level signal, the first over-temperature alarm circuit alarms, and the second over-temperature alarm circuit does not alarm; if the temperature signal detected by the temperature sensor is greater than the second comparison temperature signal W2, the first temperature comparator and the second temperature comparator both output high level signals, and the first over-temperature alarm circuit and the second over-temperature alarm circuit both alarm.
Claims (6)
1. A computer safety protection device comprises a computer power supply and is characterized by further comprising:
the computer main power supply circuit comprises a first power supply starting branch and a second power supply starting branch which are arranged in parallel, the input end of the first power supply starting branch is used for being connected with an external power supply circuit, the output end of the first power supply starting branch is connected with the computer power supply, the first power supply starting branch is provided with a normally open contact switch and a starting resistor of a first relay in series, and the second power supply starting branch is provided with an electricity-obtaining delay conducting contact switch of a first time relay in series;
the starting control circuit comprises a manual starting switch and a parallel control circuit, wherein the manual starting switch and the parallel control circuit are arranged in series, the parallel control circuit comprises a first starting control branch and a second starting control branch, the first starting control branch is arranged in parallel, the first starting control branch is arranged in series, a control coil of a first relay and an electricity-obtaining delay disconnection contact switch of the first time relay are arranged, and the second starting control branch is arranged in series, and the control coil of the first time relay is arranged in series.
2. The computer safety protection device according to claim 1, wherein the main power supply line of the computer further comprises a voltage division branch, a switch tube, a voltage regulator tube and a charging capacitor, an input end of the voltage division branch and an input end of the switch tube are used for connecting the external power supply line, an output end of the voltage division branch is grounded, a voltage division end of the voltage division branch is connected with a control end of the switch tube, a control end of the switch tube is grounded through the voltage regulator tube, the voltage regulator tube is connected with the charging capacitor in parallel, and an output end of the switch tube is connected with an input end of the first power supply starting branch.
3. The computer security protection device of claim 1, wherein a first fuse is further disposed in series in the first power activation branch, and a second fuse is further disposed in series in the second power activation branch.
4. The computer security protection device of claim 1, further comprising a power conversion circuit and a computer power monitoring device, wherein an input terminal of the power conversion circuit is connected to an output terminal of the first power supply startup branch, and an output terminal of the power conversion circuit is connected to the computer power monitoring device for supplying power to the computer power monitoring device.
5. The computer safety protection device according to claim 4, wherein the computer power monitoring device comprises a voltage sensor, a temperature sensor, a first voltage comparator, a first temperature comparator, a first overvoltage alarm circuit and a first overtemperature alarm circuit;
the voltage sensor is used for detecting the output voltage of the computer power supply, the voltage sensor is connected with a first input end of the first voltage comparator, a second input end of the first voltage comparator is used for inputting a first comparison voltage signal, and an output end of the first voltage comparator is connected with the first overvoltage alarm circuit;
the temperature sensor is used for detecting the temperature of the computer power supply, the temperature sensor is connected with a first input end of the first temperature comparator, a second input end of the first temperature comparator is used for inputting a first comparison temperature signal, and an output end of the first temperature comparator is connected with the first over-temperature alarm circuit.
6. The computer safety protection device according to claim 5, wherein the computer power monitoring device further comprises a second voltage comparator, a second temperature comparator, a second overvoltage alarm circuit and a second overtemperature alarm circuit;
the voltage sensor is connected with a first input end of the second voltage comparator, a second input end of the second voltage comparator is used for inputting a second comparison voltage signal, and an output end of the second voltage comparator is connected with the second overvoltage alarm circuit; the first comparison voltage signal is less than the second comparison voltage signal;
the temperature sensor is connected with a first input end of the second temperature comparator, a second input end of the second temperature comparator is used for inputting a second comparison temperature signal, and an output end of the second temperature comparator is connected with the second over-temperature alarm circuit; the first comparison temperature signal is less than the second comparison temperature signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120795768.8U CN214429454U (en) | 2021-04-19 | 2021-04-19 | Computer safety arrangement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120795768.8U CN214429454U (en) | 2021-04-19 | 2021-04-19 | Computer safety arrangement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214429454U true CN214429454U (en) | 2021-10-19 |
Family
ID=78075297
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120795768.8U Expired - Fee Related CN214429454U (en) | 2021-04-19 | 2021-04-19 | Computer safety arrangement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214429454U (en) |
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2021
- 2021-04-19 CN CN202120795768.8U patent/CN214429454U/en not_active Expired - Fee Related
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20211019 |
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| CF01 | Termination of patent right due to non-payment of annual fee |