CN2682477Y - Microcomputer power supply switching circuit device preventing misoperation - Google Patents
Microcomputer power supply switching circuit device preventing misoperation Download PDFInfo
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- CN2682477Y CN2682477Y CN 03231485 CN03231485U CN2682477Y CN 2682477 Y CN2682477 Y CN 2682477Y CN 03231485 CN03231485 CN 03231485 CN 03231485 U CN03231485 U CN 03231485U CN 2682477 Y CN2682477 Y CN 2682477Y
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- power supply
- sheffer stroke
- stroke gate
- computer power
- monostalbe trigger
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Abstract
The utility model relates to a microcomputer power supply switching circuit device for preventing misoperation in the microcomputer industry. The microcomputer power supply switching circuit device for preventing misoperation comprises an NAND gate, a monostable circuit, a triode, a midget relay, a resistor, and a capacitor. An electronic circuit, which comprises a CMOS four double-input NAND gates, a CMOS double monostable circuits, a triode (18), a midget relay (16), the resistor, and the capacitor that are integrated simply on a double surface printed board, is added among the power supply switching contact point, the power supplies of 'stand-by +5V' and '+5V'. With low technical difficulty and low production cost, the microcomputer power supply switching circuit device can prevent the hard disk from damage caused by the misoperation of the computer power supply switch to protect the hard disk.
Description
Technical field
The utility model relates to microcomputer with fool proof computer power switch circuit devices.
Background technology
Current, computer application is quite general, and along with the continuous development of computer technology, the memory function of its hard disk vast capacity has obtained sufficient embodiment, and people can be with a large amount of Useful Informations or data storage in computing machine, so that use at any time.But, run into sometimes in the use of computing machine that power supply is unsuitable closes, cause the damage of hard disk, and with the problem of a large amount of Useful Informations or data loss.Chinese patent 00251154 discloses a kind of hard disk protection circuit device; it mainly is to have added rechargeable type electrical storage device, charge controller and switchable type derailing switch between the hard disk connector of hard disk unit and computer apparatus; when hard disc module is detached out computer apparatus by upset operation; the hard disk unit of the power supply of switchable type derailing switch automatic switchover rechargeable type electrical storage device to the module; make hard disk unit have under the power supply supply status; magnetic head is moved to home, realize protection hard disk.Because the core of this device is that the rechargable power supplies with self continues power supply under the situation of hard disk divorced from computer power supply, and makes hard disc magnetic head return zero, but in order to detect and the hard disk that resets, must improve the hard disk signal wire, and certain degree of difficulty is arranged on the implementation; Simultaneously, because it has adopted rechargeable type electrical storage device, charge controller and switchable type derailing switch, make the structure more complicated of device, production cost is higher.
Summary of the invention
The utility model has overcome hard disk protection circuit apparatus structure complexity under original powering-off state, the higher defective of production cost, and a kind of fool proof computer power switch circuit devices is provided.This fool proof computer power switch circuit devices is eliminated because of the maloperation to computer power switch by the method for an additional simple electronic circuit on power switch, and makes the accident of hard disk corruptions, reaches the protection to hard disk.
The utility model is to realize like this, a kind of fool proof computer power switch circuit devices, comprise Sheffer stroke gate, monostalbe trigger, triode, midget relay and resistance, electric capacity, computer power switch is connected with computer power supply " standby+5V (Standby+5V) end " through second resistance, computer power supply " standby+5V end " is connected to the input end of first Sheffer stroke gate through the 3rd resistance, the input end of first Sheffer stroke gate is connected with computer power switch through first electric capacity, the output terminal of first Sheffer stroke gate is connected to " triggering (TR)+end " of an input end and first monostalbe trigger of the 4th Sheffer stroke gate respectively, " reset (Reset) end " of first monostalbe trigger connects computer power supply "+5V end " respectively and through first resistance eutral grounding, the output terminal of first monostalbe trigger " Q " is connected to second monostalbe trigger and " triggers (TR)-end ", the input end of second Sheffer stroke gate is connected with computer power supply "+5V end ", the output terminal of second Sheffer stroke gate is connected to another input end of the 4th Sheffer stroke gate, and the output terminal of the 4th Sheffer stroke gate is connected to " triggering+end " of second monostalbe trigger; The input end of the 3rd Sheffer stroke gate is connected with computer power switch, and the output terminal of the 3rd Sheffer stroke gate is connected to " reset terminal " of second monostalbe trigger; The control end of first monostalbe trigger is connected to computer power supply " standby+5V end " through second electric capacity and the 4th resistance, and the control end of second monostalbe trigger is connected to computer power supply " standby+5V end " through the 3rd electric capacity and the 5th resistance; The output terminal of second monostalbe trigger " Q " connects the base stage of triode through the 6th resistance, transistor emitter ground connection, collector is connected to computer power supply "+5V end " after connecing midget relay, and midget relay is connected to computer motherboard " power switch " (Power Switch) socket.
The utility model is by the method for an additional simple electronic circuit on computer power switch, promptly power switch contact, standby+5V and+increase simple circuit between the 5V power supply, play the maloperation that prevents owing to computer power switch, and the purpose that the hard disk corruptions accident that causes takes place.
Description of drawings
Fig. 1 is a kind of fool proof computer power switch circuit devices synoptic diagram.
Wherein, 1 is computer power switch, and 2 is first resistance, and 3 is second resistance, 4 is first electric capacity, and 5 is the 3rd resistance, and 6 is first Sheffer stroke gate, 7 is second Sheffer stroke gate, and 8 is the 3rd Sheffer stroke gate, and 9 is the 4th Sheffer stroke gate, 10 is first monostalbe trigger, and 11 is second electric capacity, and 12 is the 4th resistance, 13 is second monostalbe trigger, and 14 is the 3rd electric capacity, and 15 is the 5th resistance, 16 is midget relay, and 17 is the 6th resistance, and 18 is triode.
Embodiment
Embodiment of the present utility model is provided by accompanying drawing.
Referring to shown in Figure 1, a kind of fool proof computer power switch circuit devices, comprise Sheffer stroke gate, monostalbe trigger, triode, midget relay and resistance, electric capacity, computer power switch 1 is connected with computer power supply " standby+5V end " through second resistance 3, computer power supply " standby+5V end " is connected to the input end of first Sheffer stroke gate 6 through the 3rd resistance 5, the input end of first Sheffer stroke gate 6 is connected with computer power switch 1 through first electric capacity 4, the output terminal of first Sheffer stroke gate 6 is connected to an input end of the 4th Sheffer stroke gate 9 and " triggering+end " of first monostalbe trigger 10 respectively, " reset terminal " of first monostalbe trigger 10 connects computer power supply "+5V end " respectively and through first resistance, 2 ground connection, the output terminal of first monostalbe trigger 10 " Q " is connected to " triggering-end " of second monostalbe trigger 13, the input end of second Sheffer stroke gate 7 is connected with computer power supply "+5V end ", the output terminal of second Sheffer stroke gate 7 is connected to another input end of the 4th Sheffer stroke gate 9, and the output terminal of the 4th Sheffer stroke gate 9 is connected to " triggering+end " of second monostalbe trigger 13; The input end of the 3rd Sheffer stroke gate 8 is connected with computer power switch 1, and the output terminal of the 3rd Sheffer stroke gate 8 is connected to " reset terminal " of second monostalbe trigger 13; The control end of first monostalbe trigger 10 is connected to computer power supply " standby+5V end " through second electric capacity 11 and the 4th resistance 12, and the control end of second monostalbe trigger 13 is connected to computer power supply " standby+5V end " through the 3rd electric capacity 14 and the 5th resistance 15; The output terminal of second monostalbe trigger 13 " Q " connects the base stage of triode 18 through the 6th resistance 17, triode 18 grounded emitters, collector is connected to computer power supply "+5V end " after connecing midget relay 16, and midget relay 16 is connected to computer motherboard " power switch " socket.
In the present embodiment, electronic circuit on an additional perfecting brush board that simply is integrated in a 45*45 between computer power switch 1, " standby+5V " and "+5V " power supply by a CMOS four dual input Sheffer stroke gates, two monostable of CMOS, triode, midget relay and resistance, electric capacity, when computer power switch 1 is pressed, be the delicate positive pulse of 5-10 at width of output terminal formation of first Sheffer stroke gate 6 by first electric capacity 4 and the 3rd resistance 5:
If 1 this computer-chronograph operate as normal, then the 4th Sheffer stroke gate 9 is closed, and " reset terminal " of first monostalbe trigger 10 is+5V, making 10 triggerings of first monostalbe trigger by the rising edge of the positive pulse of first Sheffer stroke gate 6 output " triggerings+end " by first monostalbe trigger 10, is 3 seconds positive pulse at width of its output terminal " Q " formation:
A, if the time that power switch is pressed was less than 3 seconds, the negative edge of being gone up 3 seconds positive pulses that produce by the output terminal " Q " of first monostalbe trigger 10 comes then, because the output terminal of the 3rd Sheffer stroke gate 8 has been a logical zero, make second monostalbe trigger 13 be in reset mode, this negative edge just can't trigger second monostalbe trigger 13 by " triggering-end " of second monostalbe trigger 13, second monostalbe trigger, 13 output terminals " Q " are always logical zero, midget relay 16 can not move, its contact can be not closed, and computer power supply just can not closed by undesired;
B, if computing machine generation systems fault, can't normal shutdown, only need press power switch does not put, when the last negative edge of first monostalbe trigger, 10 output terminals " Q " occurs, because the output terminal of the 3rd Sheffer stroke gate 8 is a logical one, " reset terminal " of second monostalbe trigger 13 is disarm state, second monostalbe trigger 13 is triggered, under the situation that power switch is pressed, go up the positive pulse that forms 4.5 seconds width at second monostalbe trigger, 13 output terminals " Q ",, make midget relay 16 actions by triode 18, its closing of contact 4.5 seconds is carried out shutdown action in 4 seconds;
If 2 these computer-chronographs are in off-mode, " reset terminal " of first monostalbe trigger 10 is logical zeros, is reset, and can not be triggered; Simultaneously, the output terminal of second Sheffer stroke gate 7 is a logical one, the 4th Sheffer stroke gate 9 is opened, and is that the delicate positive pulse of 5-10 produces the negative pulse with width by the 4th Sheffer stroke gate 9 from the width of first Sheffer stroke gate 6, is added to " triggering+end " of second monostalbe trigger 13, its rising edge triggers second monostalbe trigger 13, making it produce a width is 4.5 seconds positive pulse, makes midget relay 16 actions, the closing of contact by triode 18, open computer power supply, start computing machine.
Through evidence, because the utility model increases simple electronic circuit between power switch contact, " standby+5V " and "+5V " power supply, technical difficulty is low, low production cost, play the maloperation that prevents owing to computer power switch, and the purpose that the hard disk corruptions accident that causes takes place.
Claims (1)
1, a kind of fool proof computer power switch circuit devices, comprise Sheffer stroke gate, monostalbe trigger, triode, midget relay and resistance, electric capacity, it is characterized in that computer power switch (1) is connected with computer power supply " standby+5V end " through second resistance (3), computer power supply " standby+5V end " is connected to the input end of first Sheffer stroke gate (6) through the 3rd resistance (5), the input end of first Sheffer stroke gate (6) is connected with computer power switch (1) through first electric capacity (4), the output terminal of first Sheffer stroke gate (6) is connected to an input end of the 4th Sheffer stroke gate (9) and " triggering+end " of first monostalbe trigger (10) respectively, " reset terminal " of first monostalbe trigger (10) connects computer power supply "+5V end " respectively and through first resistance (2) ground connection, the output terminal " Q " of first monostalbe trigger (10) is connected to " triggering-end " of second monostalbe trigger (13), the input end of second Sheffer stroke gate (7) is connected with computer power supply "+5V end ", the output terminal of second Sheffer stroke gate (7) is connected to another input end of the 4th Sheffer stroke gate (9), and the output terminal of the 4th Sheffer stroke gate (9) is connected to " triggering+end " of second monostalbe trigger (13); The input end of the 3rd Sheffer stroke gate (8) is connected with computer power switch (1), and the output terminal of the 3rd Sheffer stroke gate (8) is connected to " reset terminal " of second monostalbe trigger (13); The control end of first monostalbe trigger (10) is connected to computer power supply " standby+5V end " through second electric capacity (11) and the 4th resistance (12), and the control end of second monostalbe trigger (13) is connected to computer power supply " standby+5V end " through the 3rd electric capacity (14) and the 5th resistance (15); The output terminal " Q " of second monostalbe trigger (13) connects the base stage of triode (18) through the 6th resistance (17), triode (18) grounded emitter, collector is connected to computer power supply "+5V end " after connecing midget relay (16), and midget relay (16) is connected to computer motherboard " power switch " socket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03231485 CN2682477Y (en) | 2003-05-23 | 2003-05-23 | Microcomputer power supply switching circuit device preventing misoperation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03231485 CN2682477Y (en) | 2003-05-23 | 2003-05-23 | Microcomputer power supply switching circuit device preventing misoperation |
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| Publication Number | Publication Date |
|---|---|
| CN2682477Y true CN2682477Y (en) | 2005-03-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 03231485 Expired - Fee Related CN2682477Y (en) | 2003-05-23 | 2003-05-23 | Microcomputer power supply switching circuit device preventing misoperation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102736524A (en) * | 2011-04-07 | 2012-10-17 | 国基电子（上海）有限公司 | Power switch |
-
2003
- 2003-05-23 CN CN 03231485 patent/CN2682477Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102736524A (en) * | 2011-04-07 | 2012-10-17 | 国基电子（上海）有限公司 | Power switch |
| CN102736524B (en) * | 2011-04-07 | 2014-04-30 | 国基电子（上海）有限公司 | Power switch |
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| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |