CN201445986U - Shredder touch detection circuit - Google Patents
Shredder touch detection circuit Download PDFInfo
- Publication number
- CN201445986U CN201445986U CN2009200445828U CN200920044582U CN201445986U CN 201445986 U CN201445986 U CN 201445986U CN 2009200445828 U CN2009200445828 U CN 2009200445828U CN 200920044582 U CN200920044582 U CN 200920044582U CN 201445986 U CN201445986 U CN 201445986U
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- resistance
- shredder
- pin
- diode
- amplifier ic2a
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Abstract
The utility model relates to the technical field of the shredder, and in particular to a shredder touch detection circuit, which is characterized in that a resistor R35 and a resistor R36 are connected with a capacitor C18, a resistor R34 is connected with a pin 2 of a calculation amplifier IC2A, a diode D8 and a diode D11 are connected with the resistor R34 and the capacitor C18, a pin 3 of the calculation amplifier is connected with a resistor R25 and a resistor R33, a base electrode of a triode Q3 is connected with a pin 1 of the calculation amplifier IC2A through a resistor R15, a collector electrode of the triode Q3 is connected with one end of an opto-coupler U4 through a resistor R32, and the other end of the opto-coupler U4 is of an ANIMAL output end. When the human body and pets touch a paper feeding port of the shredder, a touch sensing strip can be touched so as to cut off the power instantly, and when the objects such as the clothes touch the shredder, the power can be instantly cut off as long as the human body touches the touch sensing strip so as to prevent the accident.
Description
Technical field
The utility model relates to a kind of device of shredder, relates in particular to a kind of shredder touch detection circuit.
Background technology
Shredder is to be used for the machine of broken books, paper, file, the file need to be keep secret that some need abandon, can not abandon simply conveniently, must blend with the file that shredder will have a literal, thereby substitute the processing mode that hand tears or burns, shredder is laborsaving and convenient, becomes the essential product of constituent parts and family gradually.
Shredder is to utilize rotating blade that paper is blocked, from the direct paper feeding of paper feed port, itself all has a power switch each shredder, the handled easily person uses, when wanting shredded paper, directly paper is sent into paper feed port, existing shredder generally all has automatic induction paper feed function, promptly when paper feed port has paper to enter, the control circuit of shredder can be controlled electric motor starting, thereby drive the rotating blade rotation paper is blocked, and existing shredder exists potential safety hazard in use, in operating process, because of carelessness hand is stretched into the shredder paper feed port, also can cause the automatic work of shredder, will cause finger to be involved in shredder, wounded or disabled incident takes place, clothing also can be involved in shredder because of carelessness in operating process, thereby causes hardly imaginable consequence.
The utility model content
The technical problems to be solved in the utility model is: finger, pet etc. enter and can cut off the power supply immediately when the shredder paper feed port causes security incident because of carelessness in the operating process of shredder, and a kind of shredder touch detection circuit is provided.
In order to overcome the defective that exists in the background technology, the technical scheme that its technical problem that solves the utility model adopts is: this shredder touch detection circuit is by an integrated operational amplifier IC2A, resistance R 15, R16, R25, R27, R32, R33, R34, R35 and R36, capacitor C 17 and C18, diode D8 and D11, triode Q3, optocoupler U4 and touch sensible bar J6 form, described resistance R 35 is connected capacitor C 18 with resistance R 36,2 pin by resistance R 34 concatenation operation amplifier IC2A, 2 pin of diode D8 and diode D11 concatenation operation amplifier IC2A, operational amplifier 3 pin connect resistance R 25 and resistance R 33, operational amplifier IC2A works in the comparator state, be output as square wave, triode Q3 base stage is by 1 pin of resistance R 15 concatenation operation amplifier IC2A, triode Q3 colelctor electrode connects optocoupler U4 one end by resistance R 32, the optocoupler U4 other end is the ANIMAL output, be output as square wave, described resistance R 35 is connected touch sensible bar J6 to its current limliting with resistance R 36, touch sensible bar J6 is the coat of metal of shredder paper feed port, described diode D8 link to each other with diode D11 and 2 pin by resistance R 34 concatenation operation amplifier IC2A with to its voltage amplitude limit, 3 pin of described resistance R 25 and resistance R 33 concatenation operation amplifier IC2A are to its voltage dividing potential drop.
According to another embodiment of the present utility model, comprise that further described operational amplifier IC2A works in the comparator state, is output as square wave.
According to another embodiment of the present utility model, comprise that further described ANIMAL output is output as square wave.
According to another embodiment of the present utility model, comprise that further described touch sensible bar J6 is the coat of metal of shredder paper feed port.
The beneficial effects of the utility model: this shredder touch detection circuit, when human body, pet etc. touches the shredder paper feed port, can touch the touch sensible bar, thereby can cut off the power supply immediately, when article such as clothing enter the shredder paper feed port, human body touches the touch sensible bar, and the shredded paper function is cut off the power supply immediately, has prevented the generation of accident.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 is a structural representation of the present utility model.
The specific embodiment
With preferred embodiment the utility model is described in further detail in conjunction with the accompanying drawings now.These accompanying drawings are the schematic diagram of simplification, basic structure of the present utility model only is described in a schematic way, so it only show the formation relevant with the utility model.
A kind of shredder touch detection circuit as shown in Figure 1 is connected capacitor C 18 by resistance R 35 with resistance R 36,2 pin by resistance R 34 concatenation operation amplifier IC2A, diode D8 links to each other with diode D11 and 2 pin by resistance R 34 concatenation operation amplifier IC2A, operational amplifier 3 pin connect resistance R 25 and resistance R 33, triode Q3 base stage is by 1 pin of resistance R 15 concatenation operation amplifier IC2A, operational amplifier IC2A works in the comparator state, be output as square wave, triode Q3 colelctor electrode connects optocoupler one end by resistance R 32, the optocoupler other end is the ANIMAL output, the ANIMAL output is output as square wave, described resistance R 35 is connected touch sensible bar J6 to its current limliting with resistance R 36, touch sensible bar J6 is the coat of metal of shredder paper feed port, described diode D8 link to each other with diode D11 and 2 pin by resistance R 34 concatenation operation amplifier IC2A with to its voltage amplitude limit, 3 pin of described resistance R 25 and resistance R 33 concatenation operation amplifier IC2A are to its voltage dividing potential drop.
When article such as clothing enter the shredder paper feed port, human body touches touch sensible bar J6, can cut off the power supply immediately, when human body or pet touch touch sensible bar J6, because of human body be stand in ground, and the power generating facilities and power grids that shredder uses are AC powers of zero line ground connection, so in case human body touch is during to the touch sensible bar, (situation that human body contacts with ground may be a pure resistor load by an impedance just to have become an AC signal, it also may be a capacitive load, it also may be an inductive load, so be called impedance here) be connected to touch sensible bar J6, pass through resistance R 35 again, resistance R 36 current limlitings are connected to the link of capacitor C 18 and resistance R 34, and this signal is transported to 2 pin of operational amplifier IC2A by resistance R 34, because of by diode D8 and diode D11 amplitude limit clamper, thus the signal of 2 pin of operational amplifier IC2A actual be a signal with the similar square wave of the employed AC power same frequency of shredder.3 pin voltages of operational amplifier are 9V, this voltage is to obtain by resistance R 25 and resistance R 33 dividing potential drops, we can be by changing the size of partial pressure value, make when square wave is high level, the 2 pin voltages of the 3 pin voltage less-than operation amplifier IC2A of operational amplifier IC2A, otherwise when the voltage of square wave is low level, the 2 pin voltages that 3 pin voltages become greater than operational amplifier IC2A.Because of operational amplifier is to be operated in the comparator state, so 1 pin was just exported a square wave when human body touch was arranged, the conducting that promotes triode Q3 with end, thereby the conducting that drives the light idol with end, also will produce a square wave at the ANIMAL end, the square wave that the ANIMAL end produces send microcontroller to handle after wave absorption and shaping, is cut off the current supply circuit at motor place by the microprocessor control on-off circuit.
Do not touch the touch sensible bar if having human body or animal, J6 is unsettled for the touch sensible bar, capacitor C 18 is connected to power supply 9V end by resistance R 27, thus the voltage of capacitor C 18 and resistance R 27 tie points near supply voltage, this voltage is transported to 2 pin of operational amplifier IC2A by resistance R 34; Because of the 3 pin voltages of operational amplifier IC2A are to be obtained by resistance R 25 and resistance R 33 dividing potential drops, so the 2 pin voltages of operational amplifier IC2A are all the time greater than the 3 pin voltages of operational amplifier IC2A, 1 pin of operational amplifier IC2A is the output low level signal all the time, triode Q3 does not have driving voltage because of base stage to be ended, light idol U4 also ends, the ANIMAL end will be exported a high level signal all the time, because output is a high level, microprocessor can gauge tap circuitry cuts motor place current supply circuit, the shredder operate as normal.
With above-mentioned foundation desirable embodiment of the present utility model is enlightenment, and by above-mentioned description, the related work personnel can carry out various change and modification fully in the scope that does not depart from this utility model technological thought.The technical scope of this utility model is not limited to the content on the specification, must determine its technical scope according to the claim scope.
Claims (4)
1. shredder touch detection circuit, comprise an integrated operational amplifier IC2A, resistance R 15, R16, R25, R27, R32, R33, R34, R35 and R36, capacitor C 17 and C18, diode D8 and D11, triode Q3, optocoupler U4 and touch sensible bar J6 form, it is characterized in that: described resistance R 35 is connected capacitor C 18 with resistance R 36,2 pin by resistance R 34 concatenation operation amplifier IC2A, diode D8 links to each other with diode D11 and is connected to 2 pin of operational amplifier IC2A by resistance R 34, operational amplifier 3 pin connect resistance R 25, resistance R 33 and capacitor C 17, triode Q3 base stage is by 1 pin of resistance R 15 concatenation operation amplifier IC2A, triode Q3 colelctor electrode connects optocoupler U4 one end by resistance R 32, the optocoupler U4 other end is the ANIMAL output, described resistance R 35 is connected touch sensible bar J6 to its current limliting with R36, described diode D8 and diode D11 2 pin by resistance R 34 concatenation operation amplifier IC2A are with to its voltage amplitude limit, and 3 pin of described resistance R 25 and resistance R 33 concatenation operation amplifier IC2A are to its voltage dividing potential drop.
2. a kind of shredder touch detection circuit as claimed in claim 1 is characterized in that: described operational amplifier IC2A works in the comparator state, is output as square wave.
3. a kind of shredder touch detection circuit as claimed in claim 1 is characterized in that: described ANIMAL output is output as square wave.
4. a kind of shredder touch detection circuit as claimed in claim 1 is characterized in that: described touch sensible bar J6 is the coat of metal of shredder paper feed port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200445828U CN201445986U (en) | 2009-06-04 | 2009-06-04 | Shredder touch detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200445828U CN201445986U (en) | 2009-06-04 | 2009-06-04 | Shredder touch detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201445986U true CN201445986U (en) | 2010-05-05 |
Family
ID=42550695
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200445828U Expired - Lifetime CN201445986U (en) | 2009-06-04 | 2009-06-04 | Shredder touch detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201445986U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104217497A (en) * | 2014-09-12 | 2014-12-17 | 成都威邦科技有限公司 | Card inserting power-saving system |
| CN108187894A (en) * | 2018-02-01 | 2018-06-22 | 柏佳佳 | A kind of detection device of food garbage treater |
| WO2022000739A1 (en) * | 2020-07-02 | 2022-01-06 | 深圳市鹰硕教育服务有限公司 | Smart pen pressure sensor drive circuit |
-
2009
- 2009-06-04 CN CN2009200445828U patent/CN201445986U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104217497A (en) * | 2014-09-12 | 2014-12-17 | 成都威邦科技有限公司 | Card inserting power-saving system |
| CN108187894A (en) * | 2018-02-01 | 2018-06-22 | 柏佳佳 | A kind of detection device of food garbage treater |
| CN108187894B (en) * | 2018-02-01 | 2022-04-01 | 柏佳佳 | Detection equipment of food waste disposer |
| WO2022000739A1 (en) * | 2020-07-02 | 2022-01-06 | 深圳市鹰硕教育服务有限公司 | Smart pen pressure sensor drive circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100505 |