Patent Application
20080048504
In order to explain the present invention in greater detail, the preferred embodiments will be described below with reference to the accompanying figures.
Refer to
The bio-voltage control switch circuit is a kind of switch transistor circuit. Refer to
The ground switch circuit is a kind of switch transistor circuit, includes the second switch triode Q2, the base electrode of the second switch triode Q2 is connected with the output terminal of said bio-voltage control switch circuit, i.e. the emitter of the first switch triode Q4, the emitter of the second switch triode Q2 is grounded, and its collector is connected with the power via the fourth resistor R7, and the collector is connected with the input control terminal of said control circuit unit 3 via the optical coupler U1.
Refer to
The ground switch circuit is a kind of switch transistor circuit, includes the second switch triode Q2, the base electrode of the second switch triode Q2 is connected with the output terminal of said bio-voltage control switch circuit, i.e. the emitter of the first switch triode Q3, the emitter of the second switch triode Q2 is grounded, and its collector is connected with the input control terminal of said control circuit unit 3.
In the present invention, the control circuit unit 3 according to the paper-breaker touching safety protector is connected further with a paper-entry detecting circuit unit 5, in
The control circuit unit 3 according to the paper-breaker touching safety protector is connected further with an over-load protection circuit unit 6 and a motor reverse-run detecting circuit unit 7.
In application, one end of the motor driving circuit unit 2 is electrically connected with the said control circuit unit 3, the other end is electrically connected with the said paper-breaking machinery part 1 to drive the paper-breaker to work; one end of the said motor reverse-run detecting circuit unit 7 is electrically connected with the said control circuit unit 3, the other end is electrically connected with the said paper-breaking machinery part 1 to detect the reverse run signal and transmit the reverse run signal to the said control circuit unit 3, and make the control circuit unit 3 to control the paper-breaking machinery part 1's reverse run; one end of the paper-entry detecting circuit unit 5 is electrically connected with the said control circuit unit 3, the other end is electrically connected with the said control circuit power to monitor the paper-entry signal, in case of the paper enters into the portal of the said paper-breaking machinery part 1, the said paper-entry detecting circuit unit 5 transmits the paper-entry signal to the said control circuit unit 3, after the control circuit unit 3 processing, said motor driving circuit unit 2 would be conductive and drive the paper-breaking machinery part 1 to work.
Refer to
Refer to
Over-load
Light activated paper-breaking
Paper breaking, close and reverse run function
Human-body contact auto-stop.
The power circuit for the control circuit utilizes the resistor-capacitor to cut down the voltage, a 24V low voltage control circuit power is provided from the live wire of the electric supply power through the resistors R1, R2, capacitors C1, C2, diodes D5, D6 and constant-voltage diode ZD1. The potential difference between power positive pole and zero line of the control circuit is 24V, it is even more less than the human-body safe voltage and has no danger to human and animal. The power circuit processed by human-body touch panel is a bridge rectifying circuit, a 12V DC power is turned out from the constant & filter circuit. The circuit consists of diodes D1˜D4, constant diodes ZD2, resistor R12 and capacitor C3.
The human-body contact metal part is connected with the base electrode of triode Q4 via a resistor (1 MΩ), and make use of the human-body electro-static disturbance to drive the triodes Q2, Q4. The Q3 is off and stop the motor to realize the paper-breaker's human-body contact auto-stop function.
Refer to
Switch LED indication
Touch protection LED indication
Over-load, over-load LED indication
Power indication
Light activated paper-breaking
Paper breaking, close and reverse run function
If remove the resistors R18, R14, R13, R11, R12, LED1, LED2, diodes D10, D9, D6, constant diode ZD2, capacitor C5 and silicon controlled rectifier SCR, the apparatus would have no over-load and switch LED indication functions, and the circuit could be applied to the middle class apparatus.
If remove the resistors R18, R14, R13, R11, R12, R16, R17, LED 1, LED 2, LED 3, diodes D10, D9, D6, D12, D13, constant diode ZD2, capacitor C5, silicon controlled rectifier SCR and triode Q4, the apparatus would have no functions of over-load, overload indication, power indication and switch indication, the circuit could be applied to the lower class apparatus.
The power circuit for the control circuit utilizes the resistor-capacitor to cut down the voltage, a 24V low voltage power circuit is provided from the live wire of the electric supply power through the resistors R1, R2, capacitors C1, C2, diodes D1, D2 and constant-voltage diode ZD1. The potential difference between power positive pole and zero line of the control circuit is 24V, it is even more less than the human-body safe voltage and has no danger to human and animal. The human-body contact metal part is connected with the base electrode of triode Q3 via two resistors R6 and R7, and make use of the human-body electro-static disturbance to drive the triodes Q2, Q3. The Q1 is off and stop the motor to realize the protection function.
A bridge rectifying circuit may be applied to provide power to the touching circuit, and an optical coupler may be used to isolate the motor control circuit, and thus realize a more stable apparatus operation.
The touch auto-stop principle is as follows:
(1) In case of the apparatus is in the state of paper-breaking or reverse run, if the human-body touches with the panel metal part, the resistors R7, R6, R8, diode D4, capacitor C3 would form a triode base electrode power supply circuit, the triode Q3 would conductive, and the triode Q2 would be conductive on the basis of the base electrode voltage. When the triode Q2 is conductive, its collector voltage would be lower, the touch indicating light and resistor R5 would constitute a loop, and the touch indicating light would be on. The base electrode voltage of Q5 would be lower on the basis of the diode D16 conduction, if the apparatus is in reverse run state, the triode Q5 would be cut-off on the basis of the lower base electrode voltage and the apparatus would stop. If the apparatus is in the paper-breaking state, the base electrode voltage of the triode Q1 would be lower on the basis of the diode D15 conduction, the triode Q1 would be cut-off, the relay would be switched off, and the apparatus would stop to effect a safety protection.
(2) The apparatus is stopped by human-body touching, when human-body is separated from the apparatus, the triode Q3 would be cut-off because of no base electrode conductive voltage and the apparatus would resume a normal operation.
The operation principle of the power indication circuit is as follows:
The power indicating light, resistors R17, R16 and triode Q4 constitute a basic power indicating light circuit, if the functional switch is in the stop state, the power indicating light is off because of the emitter of triode Q4 has no conductive circuit. If the functional switch is in reverse run position, the emitter of triode Q4, diode D12 and functional switch constitute a conductive circuit, and the power indicating light would be on. If the functional switch is in the paper-breaking state, the emitter of triode Q4, diode D13 and functional switch constitute a conductive circuit, and the power indicating light would be on.
In view of the paper-breaker touching safety protector according to the present invention, owing to the fact that the serial bio-voltage control switch circuit and ground switch circuit are to be applied, the input control terminal of the bio-voltage control switch circuit is connected with the conductive touch panel at the paper-entry port of the paper-breaker, the output terminal of the control switch circuit is connected with the input control terminal of the said ground switch circuit, the output terminal of the ground switch circuit is connected with the input control terminal of the said control circuit unit 3, in case of human-body contacts with the conductive touch panel, both the bio-voltage control switch circuit and ground switch circuit are conductive by the human-body bio-current to stop the control circuit unit 3 to work, even though the power switch is turned on, the paper-breaking machinery part 1 wouldn't work, and thus could effect a protective rule from the accident harm to human body and realize a real-time safe monitor; the whole controlling is safe and sensitive with a simple circuit structure and reliable operation performance, it functions a convenient manipulation and wide usability with the safety.
While the present invention has been particularly shown and described with references to preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the claims. It is clearly understood therefore that the same is by way of illustration and example only and is not to be taken by way of limitation.
| Number | Date | Country | Kind |
|---|---|---|---|
| 200620043955.6 | Jul 2006 | CN | national |
