A computer switch system based on relay and logic control technology

Abstract

The present invention discloses a computer switch system based on relay and logic control technology, which is composed of a double button switch (1), a double relay (3), an external DC power supply and a maintenance module. After the computer is normally turned on and turned off, the double relay switch contacts are automatically separated without manually cutting off the power supply and network line connection, thereby "mechanically shutting off" the network and power connection, and completely solving the hidden dangers and problems such as information leakage, fire and reactive power loss when the computer is turned off. It has a simple structure, reliable operation, low cost, and is easy to modify existing computers. It has high practical application value and broad market prospects.

Description

Technical Field

[0001] The present invention relates to a computer switch system based on relay and logic control technology, and in particular to the technical field of a computer switch system based on dual-body relay logic control technology that mechanically and automatically cuts off network and power supply connections after shutdown. Background Art

[0002] At present, computers and the Internet have been widely used in various fields, bringing great convenience to our work and life, and the usage is extremely huge. According to a report released by IDC, the average annual shipment of personal computing devices in the world in recent years is more than 400 million units. According to an estimate of a five-year service life, the number of computers in use is about 2 billion units. According to relevant statistics, about 130 million people in China use computers. From 2014 to 2018, the total production and sales volume of computers nationwide reached 1.65 billion units, and the total number of computers in use is conservatively estimated to be more than 1 billion units. Except for a very small number of computers, most of them are connected to various networks.

[0003] However, there are the following serious problems and hidden dangers in the use of computers: ① Network security risks: After people shut down their computers, they generally do not manually cut off the network signal and power supply. The electronic components inside the computer "electronically shut down" the host circuit, and the computer is in a dormant state. External devices have ample time to invade specific computer systems through network cables and power cables and steal important information stored inside. Since there is no one on duty at this time, this kind of stealing behavior is extremely difficult to be discovered and prevented, and the security risks are huge. In other words, for the security of computer information network, "electronic shutdown" is not reliable. ② Fire hazards: After the computer is turned off, the primary coil of its internal transformer is still connected to the power grid. If the circuit is damp, animals gnaw (mainly rats and ants) and other accidents occur, it is very easy to cause a short circuit in the power line and cause a fire, which is a great fire safety hazard. ③ Power consumption problem: Based on ①, after the computer is turned off, the host electronic switch has leakage and the transformer also has certain losses (iron loss and copper loss). Since the number of computers in the shutdown state is extremely large, the total amount of unnecessary power consumption is also quite large, and the waste of power resources cannot be ignored.

[0004] In order to prevent network security problems, many governments and enterprises have invested a lot of manpower, material and financial resources to develop network security technologies. The most important measure is to use software to prevent theft. However, due to the inherent defects of anti-theft software such as low reliability (useless in front of professional experts) and high development and use costs, software anti-theft technology is difficult to apply in practice. In addition, for the problems of fire hazards and unnecessary power consumption, there is no more convenient, fast and effective solution except for manually cutting off the power supply. Summary of the invention

[0005] In view of the above problems, the present invention discloses a computer switch system based on relay and logic control technology, which consists of a double push button switch, a double relay, an external DC power supply and a maintenance module; the double push button switch consists of a pilot switch, a host switch and a return spring, and the pilot switch and the host switch are normally open contact switches; the double relay consists of an iron core, a pilot coil and a maintenance coil concentrically wound thereon, a three-way power switch and an eight-way network switch, the three-way (one for grounding and two for external AC power lines) power switches and the eight-way (corresponding to network cable cores) network switches are all normally open contact switches and can be synchronously attracted by the iron core magnetic field; the maintenance module is an electronic circuit that receives a continuous signal output by a computer host and outputs a DC current, and the continuous signal selects a continuous signal that is last turned off when the computer host is shut down.

[0006] Connection: The pilot switch and the host switch are mechanically linked (synchronously operated by the same mechanical operation), and the return spring keeps the double button switch reset (normally open) when there is no external force; the pilot switch is connected in series with the external DC power supply and the pilot coil and controls the DC pilot current loop (in order to simplify the circuit, the present invention designs one end of the external DC power supply and the pilot coil to be grounded, and can be directly connected in practice); the host switch is connected to the computer host circuit to provide the computer with a power on or off signal (the same function as a conventional computer switch); the input end of the maintenance module is connected to the continuous signal output end of the host circuit, and the output end is connected to the maintenance coil to control the maintenance current loop; the circuit connection ensures that the currents in the pilot coil and the maintenance coil are in the same direction (that is, the DC pilot current and the DC maintenance current are in the same direction, and the attracting magnetic field excited in the iron core is in the same direction); the wiring terminals on both sides of the three-way power switch are respectively connected to the external AC power supply and the input end of the computer transformer; the eight-way network switch is connected to the network and the host network signal input end.

[0007] The present invention adopts relay technology, logic control technology and automatic control technology. After the computer is normally turned on and turned off, there is no need to manually cut off the power supply and network line connection. The double relay switch contacts are automatically separated, thereby "mechanically shutting off" the network and power supply connection, and completely solving the hidden dangers and problems such as information leakage, fire and reactive power loss when the computer is turned off. It has a simple structure, reliable operation, low cost, easy modification of existing computers, high practical application value and broad market prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a static structure schematic diagram of the present invention.

[0009] Figure 2 This is a schematic diagram of the switch system working when the button is pressed during normal startup of the present invention.

[0010] Figure 3 This is a schematic diagram of the switch system operation when the button is released during normal startup of the present invention.

[0011] Figure 4 It is a working schematic diagram of the switch operation forced shutdown switch system of the present invention.

[0012] In addition to the structures shown in the figure, the names of the parts corresponding to the serial numbers and marks in the figure are as follows:

[0013] 1-Double push button switch, 2-Return spring, 3-Double relay, K 先 -Pilot switch, K 主机 -Host switch, Core-core, L 先 -Pilot coil, L 维 -Maintaining coil, K 电 -Three-way power switch, K 网 - Eight-way network switch, I 维 -DC holding current, I 先 -DC pilot current

[0014] Note: The three-way power switch K in the above figure 电 and eight-way network switch K 网 Only one of them is used for indication. DETAILED DESCRIPTION

[0015] 1. Specific structure and connection

[0016] 1. If Figure 1 As shown, the present invention discloses a computer switch system based on relay and logic control technology, which is composed of a double button switch 1, a double relay 3, an external DC power supply and a maintenance module. The double button switch 1 is composed of a pilot switch K 先 , Host switch K 主机 And return spring 2, pilot switch K 先 And host switch K 主机 It is a normally open contact switch; the double relay 3 consists of an iron core Core, a pilot coil L 先 , Maintain coil L 维 , three-way power switch K 电 and eight-way network switch K 网 Composition, three-way power switch K 电 and eight-way network switch K 网 It is a normally open contact switch, and is synchronously attracted by the magnetic field of the core Core; the maintenance module can output a DC maintenance current I when receiving a continuous signal output by the host circuit. 维 electronic circuits.

[0017] 2. Connection

[0018] Pilot switch K 先 And host switch K 主机Mechanical linkage, that is, the moving contact groups of both are insulated and fixed on the button of the double push button switch 1; the preload of the return spring 2 can reset the double push button switch 1, that is, keep the pilot switch K in the absence of external force 先 And host switch K 主机 Normally open; pilot switch K 先 The two ends are connected to the external DC power supply and the pilot coil L 先 And form a pilot circuit (to simplify the circuit, this solution designs one end of the external DC power supply and the pilot coil to be grounded, which can be directly connected in practice); host switch K 主机 Connect to the computer host circuit (provide on / off trigger signals for the computer main circuit); pilot coil L 先 and the maintaining coil L 维 Concentrically wound on the iron core Core; the input end of the maintenance module is connected to the computer host circuit (receives the continuous signal output by the computer and outputs a DC maintenance current I 维 ), the output end is connected to the maintaining coil L 维 (Can be connected to maintain coil L 维 Output DC holding current I 维 );Through appropriate line connection, the pilot coil L 先 and the maintaining coil L 维 The DC holding current I 维 With DC pilot current I 先 Same direction; three-way power switch K 电 The two terminals are connected to the external AC power supply and the host power supply respectively; the eight-way network switch K 网 The connection terminals on both sides are respectively connected to the external network and the network signal input terminal of the computer host.

[0019] 2. Work Project

[0020] 1. Turn on the computer

[0021] ①Power on command: Figure 2 As shown, press the double button switch 1, the pilot switch K 先 And host switch K 主机 Synchronous closure. Pilot switch K 先 Closed, the pilot circuit is closed, and the external DC power supply is the pilot coil L 先 Output DC pilot current I 先 , excites the magnetic field in the core Core, and synchronously attracts the three-way power switch K 电 and eight-way network switch K 网 , complete the computer power circuit and network connection; at the same time, the host switch K 主机 Closed to provide a power-on signal to the host circuit, the computer starts and outputs a continuous signal instruction to maintain the module output DC maintenance current I 维 (The line connection has ensured that the DC pilot current I先 Same direction), core magnetic field enhancement, three-way power switch K 电 and eight-way network switch K 网 Keep closed, the host computer will execute the boot procedure;

[0022] ② Normal work: Figure 3 As shown, release the double button switch 1, the return spring 2 resets it, and the pilot switch K 先 And host switch K 主机 Disconnect at the same time. Host switch K 主机 Disconnect, the computer startup command is completed; pilot switch K 先 Disconnect, DC pilot current I 先 disappears, the magnetic field of the core weakens, and since the computer has been turned on and outputs a continuous signal, the DC maintenance current I 维 Continuous output, three-way power switch K 电 and eight-way network switch K 网 The computer host runs the startup program and enters normal working state.

[0023] 2. Shut down

[0024] (1) Normal shutdown

[0025] ①Based on Figure 3 , select and click the normal shutdown command, and the host circuit begins to shut down the programs running on the computer in the specified order. During this process, the host circuit also has a continuous signal output, and the DC maintenance current I 维 Keep three-way power switch K 电 and eight-way network switch K 网 closure;

[0026] ② After the shutdown program is executed (all running programs are closed and the host circuit low-voltage power supply is electronically shut down), the continuous signal output by the host circuit disappears, and the maintenance module outputs a DC maintenance current I 维 Then disappear (DC pilot current I 先 The magnetic field of the core disappears completely, and the three-way power switch K 电 and eight-way network switch K 网 Synchronous shutdown, the computer power circuit and network connection are cut off, and the switch system enters Figure 1 Static shown.

[0027] (2) Command forced shutdown

[0028] based on Figure 3, operate the keyboard or mouse to select and click the forced shutdown command. The computer host forcibly shuts down the low-voltage power supply circuit, all running programs end abnormally, the continuous signal output by the host circuit disappears, and the maintenance module no longer outputs the DC maintenance current I 维 , the magnetic field of the core disappears completely, and the three-way power switch K 电 and eight-way network switch K 网 Synchronous shutdown, the computer power circuit and network are cut off, and the switch system enters Figure 1 Static shown.

[0029] (3) Force shutdown by switch operation

[0030] ①Forced shutdown command: based on Figure 3 ,like Figure 4 As shown, long press the double button switch 1, the pilot switch K 先 And host switch K 主机 Synchronous closure. Pilot switch K 先 Closed, the pilot circuit is closed, and the external DC power supply is the pilot coil L 先 Output DC pilot current I 先 , magnetic field in the core is strengthened, three-way power switch K 电 and eight-way network switch K 网 Keep it closed, that is, the computer power circuit and the network remain connected; at the same time, switch K 主机 When closed for a long time, it provides a forced shutdown signal to the host circuit, and the computer starts to execute the forced shutdown procedure;

[0031] ② Shutdown: The low-voltage power supply circuit of the computer host is electronically shut down, the entire computer stops working abnormally, all running programs end abnormally, the continuous signal output by the host circuit disappears, and the maintenance module no longer outputs the DC maintenance current I 维 At this time, due to the pilot switch K 先 Closed, external DC power supply is pilot coil L 先 Output DC pilot current I 先 , the magnetic field in the core Core maintains the three-way power switch K 电 and eight-way network switch K 网 Close; release double button switch 1, pilot switch K 先 And host switch K 主机 Disconnect at the same time. Host switch K 主机 Disconnect, the computer forced shutdown command is completed; pilot switch K 先 Disconnect, DC pilot current I 先 disappear, the magnetic field of the core disappears, and the three-way power switch K 电 and eight-way network switch K 网 Synchronous shutdown, forced shutdown completed, the switch system enters Figure 1Static shown.

[0032] (4) Power off

[0033] based on Figure 3 When the AC power supply or the host low-voltage power supply is cut off manually or accidentally disconnected, the computer host stops working abnormally, all running programs end abnormally, the continuous signal output by the host circuit disappears, and the maintenance module no longer outputs the DC maintenance current I 维 , three-way power switch K 电 and eight-way network switch K 网 Then it is shut down synchronously, and the switch system enters the Figure 1 Static shown.

Claims

1. A computer switch system based on relay and logic control technology, characterized in that: It is composed of a double push button switch (1), a double relay (3), an external DC power supply and a maintenance module. The double push button switch (1) is composed of a pilot switch (K 先 )、Host switch (K 主机 ) and a return spring (2), the pilot switch (K 先 ) and host switch (K 主机 ) is a normally open contact switch, and the double relay (3) consists of an iron core (Core), a pilot coil (L 先 ), maintaining coil (L 维 ), three-way power switch (K 电 ) and eight-way network switch (K 网 ) and three-way power switch (K 电 ) and eight-way network switch (K 网 ) is a normally open contact switch and is synchronously attracted by the core magnetic field. The maintenance module can output a DC maintenance current (I 维 ) electronic circuit, pilot switch (K 先 ) and host switch (K 主机 ) mechanical linkage, that is, the moving contact groups of both are insulated and fixed on the button of the double push button switch (1), and the pilot switch (K 先 ) are connected to the external DC power supply and the pilot coil (L 先 ) and form a pilot circuit, the host switch (K 主机 ) is connected to the host computer circuit, the input end of the maintenance module is connected to the host computer circuit, and the output end is connected to the maintenance coil (L 维 ), three-way power switch (K 电 ) The two terminals on both sides are connected to the external AC power supply and the host power supply respectively, and the eight-way network switch (K 网 ) The terminals on both sides are connected to the external network and the computer host network signal input terminal respectively.

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