CN209913796U - Switching circuit - Google Patents
Switching circuit Download PDFInfo
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- CN209913796U CN209913796U CN201920608330.7U CN201920608330U CN209913796U CN 209913796 U CN209913796 U CN 209913796U CN 201920608330 U CN201920608330 U CN 201920608330U CN 209913796 U CN209913796 U CN 209913796U
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Abstract
The utility model relates to a switching circuit, press switching element, first energy storage component discharges and second energy storage component charges, and the second control element switches on in the twinkling of an eye when pressing switching element, and the discharge element begins to discharge to first energy storage component, and the partial pressure unit begins the partial pressure and makes first control element switch on, and first control element still switches on second control element and keeps continuously switching on simultaneously, both realized the switching on of control consumer power; the switch element is pressed again, the second energy storage element discharges and the first energy storage element charges, so that the first control element is cut off, the voltage division unit stops voltage division, the second control element is cut off, the power supply of the electric equipment is controlled to be disconnected, and the voltage division unit starts to charge the first energy storage element through the discharge unit; the realization need not to use microprocessor, can realize pressing the inching switch to switch on or break off equally, and the circuit is simple, and is with low costs, small, extensive applicability.
Description
Technical Field
The utility model relates to a power control technical field, more specifically say, relate to a switch circuit.
Background
Existing switches are divided into two categories: one is a normally closed and normally open switch, and the other is a inching switch; the normally closed and normally open switch is used for directly controlling the power supply of the electric equipment, the circuit is simple, but when the high-voltage electric equipment is controlled, the power supply of the electric equipment is directly controlled in the mode, and stricter requirements are provided for the operating specification and the quality of the switch;
the inching switch is used for controlling the on-off of the power supply of the electric equipment, most of the electric equipment is switched on and off by being matched with the microcontroller and the electric control device, and programs need to be written, so that the electric equipment is very inconvenient to use;
a circuit capable of realizing one-touch opening or one-touch opening on the same inching switch without a microprocessor is provided subsequently, but the circuit is complex, high in cost and large in size.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in, to prior art's above-mentioned defect, provide one kind and need not to use microprocessor, use a inching switch equally can realize pressing switch on or break off, the circuit is simple, small, with low costs switched circuit.
The utility model provides a technical scheme that its technical problem adopted is:
constructing a switching circuit including a first control element and a switching element; the first control element is used for controlling the connection and disconnection of a power supply of external electric equipment, the first control element is connected with a voltage division unit for dividing voltage, the voltage division unit is connected with a second control element for controlling the connection and disconnection of the first control element, and the first control element is connected with the second control element; the switching element is used for controlling the on and off of the second control element, the switching element is further connected with a first energy storage element and a second energy storage element, the first energy storage element is further connected with a discharging element for discharging, and the discharging element is further connected with the voltage dividing unit; the second energy storage element and the switch element are both connected with the second control element.
The switch circuit of the present invention, wherein the first control element is a field effect transistor, a source electrode of the field effect transistor is a power input end, and a drain electrode of the field effect transistor is a power output end; and the grid electrode of the field effect tube is connected with the voltage division unit.
The switch circuit of the present invention, wherein the voltage dividing unit includes a first resistor and a second resistor, the first resistor is connected to the positive electrode of the power supply, and the other end of the first resistor is connected to the gate of the field effect transistor and the second resistor respectively; the other end of the second resistor is connected with the second control element and the discharge element respectively.
The switch circuit of the present invention, wherein the discharge element is a discharge resistor, the discharge resistor is connected to the other end of the second resistor, and the other end of the discharge resistor is connected to the first energy storage element; the second control element is a triode, the collector of the triode is connected with the other end of the second resistor, and the emitter of the triode is grounded; the base electrode of the triode is connected with the drain electrode of the field effect transistor in parallel, and the base electrode of the triode is also connected with the switching element and the second energy storage element respectively.
The switch circuit of the present invention, wherein the switch element is a jog switch, the first energy storage element is a first capacitor, and the second energy storage element is a second capacitor; the first end of the first capacitor is connected with the other end of the discharge resistor; the first end of the inching switch is respectively connected with the base electrode of the triode and the first end of the second capacitor, and the second end of the inching switch is connected with the first end of the first capacitor; the second end of the first capacitor and the second end of the second capacitor are both grounded.
Switch circuit, wherein, switch circuit still includes radium carving machine and fan, first control element still is used for control radium carving machine with switching on and breaking off of the power of fan, first control element still respectively with radium carving machine with the fan is connected
The beneficial effects of the utility model reside in that: the first control element and the voltage division unit are both connected with the positive electrode of the power supply, the first energy storage element stores full electric energy under the power-on condition, the first control element is cut off, meanwhile, the second control element is also cut off, and the power supply of the external electric equipment is disconnected; the first energy storage element discharges and the second energy storage element charges when the switch element is pressed down, the second control element is conducted at the moment when the switch element is pressed down, the discharge element starts to discharge the first energy storage element, the voltage division unit starts to divide the voltage to conduct the first control element, and meanwhile the first control element conducts and keeps continuous conduction of the second control element, so that the conduction of the power supply of the electric equipment is controlled; the switch element is pressed again, the second energy storage element discharges and the first energy storage element charges, so that the first control element is cut off, the voltage division unit stops voltage division, the second control element is cut off, the power supply of the electric equipment is controlled to be disconnected, and the voltage division unit starts to charge the first energy storage element through the discharge unit; the realization need not to use microprocessor, can realize pressing the inching switch to switch on or break off equally, and the circuit is simple, and is with low costs, small, extensive applicability.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be further described with reference to the accompanying drawings and embodiments, wherein the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained without inventive efforts according to the drawings:
fig. 1 is a schematic circuit diagram of a switching circuit according to a preferred embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, a clear and complete description will be given below with reference to the technical solutions of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, belong to the scope of protection of the present invention.
The switching circuit of the preferred embodiment of the present invention is shown in fig. 1, and includes a first control element Q1 and a switching element K1; the first control element Q1 is used for controlling the on and off of the power supply of the external electric equipment, the voltage dividing unit 100 for dividing the voltage is connected to the first control element Q1, the second control element Q2 for controlling the on and off of the first control element Q1 is connected to the voltage dividing unit 100, and the first control element Q1 is connected with the second control element Q2; the switching element K1 is used to control the on and off of the second control element Q2, the switching element K1 is further connected to a first energy storage element C1 and a second energy storage element C2, the first energy storage element C1 is further connected to a discharging element R8 for discharging, and the discharging element R8 is further connected to the voltage dividing unit 100; the second energy storage element C2 and the switching element K1 are both also connected with a second control element Q2;
the switch circuit further comprises a laser etching machine and a fan, the first control element is also used for controlling the connection and disconnection of power supplies of the laser etching machine and the fan, and the first control element is also respectively connected with the laser etching machine and the fan; so as to adapt to the use requirement; the fan is used for dispelling harmful gas and smog that produce when carving with the radium carving machine.
The first control element Q1 and the voltage division unit 100 are both connected with the positive electrode of the power supply, the first energy storage element C1 is full of electric energy under the power-on condition, the first control element Q1 is cut off, meanwhile, the second control element Q2 is also cut off, and the power supply of the laser carving machine and the fan (or external electric equipment) is disconnected; when the switch element K1 is pressed, the first energy storage element C1 discharges and the second energy storage element C2 charges, and the second control element Q2 is turned on at the moment when the switch element K1 is pressed, the discharge element R8 starts to discharge the first energy storage element C1, the voltage division unit 100 starts to divide the voltage to turn on the first control element Q1, and simultaneously the first control element Q1 also turns on the second control element Q2 and keeps continuous conduction, so that the conduction of the power supply of the laser engraving machine and the fan (or external electric equipment) is controlled; when the switch element K1 is pressed again, the second energy storage element C2 discharges and the first energy storage element C1 charges, so that the first control element Q1 is turned off, the voltage dividing unit 100 stops dividing voltage, the second control element Q2 is turned off, and the voltage dividing unit 100 starts to charge the first energy storage element C1 through the discharging unit while the power supply of the laser engraving machine and the fan (or the external electric equipment) is controlled to be disconnected; the realization need not to use microprocessor, can realize pressing the inching switch K1 to switch on or break off equally, and the circuit is simple, and is with low costs, small, extensive applicability.
As shown in fig. 1, the first control element Q1 is a field effect transistor Q1, a source of the field effect transistor Q1 is a power input terminal connected to an anode of an external power supply, and a drain of the field effect transistor Q1 is a power output terminal connected to the power anodes of the laser engraving machine and the fan (or an external electrical device), respectively; the grid of the field effect transistor Q1 is connected with the voltage dividing unit 100 to meet the requirement of the field effect transistor Q1 on the on/off voltage; the source electrode of the field effect transistor Q1 can also be connected with the positive electrode of a power supply, so that the laser carving machine and the fan (or external electric equipment) can be directly powered by the power supply to adapt to different use requirements; the field effect transistor Q1 is further connected with a diode D1, the anode of the diode D1 is connected with the drain electrode of the field effect transistor Q1, the cathode of the diode D1 is connected with the power supply anode of the laser carving machine and the fan (or external electric equipment) for the power supply output end, reverse connection protection is achieved, and safety of the circuit is improved.
As shown in fig. 1, the voltage dividing unit 100 includes a first resistor R1 and a second resistor R2, the first resistor R1 is connected to the positive electrode of the power supply, and the other end of the first resistor R1 is connected to the gate of the fet Q1 and the second resistor R2; the other end of the second resistor R2 is connected to the second control element Q2 and the discharge element R8, respectively; the voltage division circuit using the resistor is simple and low in cost.
As shown in fig. 1, the discharge element R8 is a discharge resistor R8, and a voltage dividing circuit using resistors is simple and low in cost, the discharge resistor R8 is connected to the other end of the second resistor R2, and the other end of the discharge resistor R8 is connected to the first energy storage element C1; the second control element Q2 is a triode Q2, the collector of the triode Q2 is connected with the other end of the second resistor R2, and the emitter of the triode Q2 is grounded; the base electrode of the triode Q2 is connected in parallel with the drain electrode of the field effect transistor Q1 and is used for providing conducting voltage for the triode Q2 and ensuring that the triode Q2 keeps continuous conduction, and the base electrode of the triode Q2 is also connected with the switching element K1 and the second energy storage element C2 respectively; the base of the triode Q2 and the drain of the field effect transistor Q1 are connected in parallel with a third resistor R3, the base of the triode Q2 and the grid of the triode Q2 are connected in parallel with a fourth resistor R4, and the base of the triode Q2 is divided by the third resistor R3 and the fourth resistor R4, so that the triode Q2 is protected from being broken down, and the operation stability of the circuit is improved.
As shown in fig. 1, the switching element K1 is a jog switch K1, the first energy storage element C1 is a first capacitor C1, and the second energy storage element C2 is a second capacitor C2; a first end of the first capacitor C1 is connected with the other end of the discharge resistor R8; a first end of the inching switch K1 is respectively connected with a base electrode of the triode Q2 and a first end of the second capacitor C2, and a second end of the inching switch K1 is connected with a first end of the first capacitor C1; the second end of the first capacitor C1 and the second end of the second capacitor C2 are both grounded; the charging and discharging of the first capacitor C1 and the second capacitor C2 are realized, and the on and off of the control triode Q2 are realized.
Scene one:
the source electrode of the field-effect tube Q1 and the first resistor R1 are both connected with the positive electrode of a power supply, the drain electrode of the field-effect tube Q1 is respectively connected with the positive electrodes of the power supply of the laser engraving machine and the fan (or external electric equipment), the first capacitor C1 is fully charged under the power-on condition, the triode Q2 is cut off, meanwhile, the field-effect tube Q1 is also cut off, and the power supply of the laser engraving machine and the fan (or external electric equipment) is disconnected; pressing the jog switch K1, the first capacitor C1 discharges and the second capacitor C2 charges, and at the instant of pressing the jog switch K1, the transistor Q2 turns on (the voltage at the base of the transistor Q2 is equal to the discharge voltage of the first capacitor C1 at the instant of pressing the jog switch K1, i.e. the electric energy of the first capacitor C1 is instantaneously transferred to the second capacitor C2 and simultaneously drives the transistor Q2 to turn on, i.e. the voltage of the first capacitor C1 is higher than the voltage of the second capacitor C2), the discharge resistor R8 starts to discharge the first capacitor C1 due to the conduction of the transistor Q2, at the same time, the first resistor R1 and the second resistor R2 start to divide the voltage (i.e. pull the gate voltage of the fet Q1 low) to turn on the fet Q1, meanwhile, the drain electrode of the field effect transistor Q1 outputs positive electricity to the base electrode of the triode Q2, so that the triode Q2 is kept continuously conducted, and the conduction of the power supply of the laser engraving machine and the fan (or external electric equipment) is controlled;
when the jog switch K1 is pressed again, the second capacitor C2 discharges and the first capacitor C1 charges (the electric energy of the second capacitor C2 is instantaneously transferred to the first capacitor C1 at the moment when the jog switch K1 is pressed), so that the triode Q2 is turned off, the first resistor R1 and the second resistor R2 stop dividing voltage (the voltage dividing circuit formed by the triode Q2 turning off the first resistor R1 and the second resistor R2 in series is grounded, so that a pull-up resistor is formed), the field-effect transistor Q1 is turned off (the gate voltage of the field-effect transistor Q1 is pulled up), so that the power supply of the laser engraving machine and the fan (or the external electric equipment) is controlled to be disconnected, and the first resistor R1 and the second resistor R2 start to charge the first capacitor C1 through the discharge resistor R8 for use in the next operation.
It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are considered to be within the scope of the invention as defined by the following claims.
Claims (6)
1. A switching circuit includes a first control element and a switching element; the first control element is used for controlling the connection and disconnection of a power supply of external electric equipment, the first control element is connected with a voltage division unit for dividing voltage, the voltage division unit is connected with a second control element for controlling the connection and disconnection of the first control element, and the first control element is connected with the second control element; the switching element is used for controlling the on and off of the second control element, the switching element is further connected with a first energy storage element and a second energy storage element, the first energy storage element is further connected with a discharging element for discharging, and the discharging element is further connected with the voltage dividing unit; the second energy storage element and the switch element are both connected with the second control element.
2. The switch circuit of claim 1, wherein the first control element is a field effect transistor, a source of the field effect transistor is a power input terminal, and a drain of the field effect transistor is a power output terminal; and the grid electrode of the field effect tube is connected with the voltage division unit.
3. The switch circuit according to claim 2, wherein the voltage dividing unit includes a first resistor and a second resistor, the first resistor is connected to a positive electrode of a power supply, and the other end of the first resistor is connected to the gate of the fet and the second resistor, respectively; the other end of the second resistor is connected with the second control element and the discharge element respectively.
4. The switch circuit according to claim 3, wherein the discharge element is a discharge resistor, the discharge resistor is connected to the other end of the second resistor, and the other end of the discharge resistor is connected to the first energy storage element; the second control element is a triode, the collector of the triode is connected with the other end of the second resistor, and the emitter of the triode is grounded; the base electrode of the triode is connected with the drain electrode of the field effect transistor in parallel, and the base electrode of the triode is also connected with the switching element and the second energy storage element respectively.
5. The switching circuit according to claim 4, wherein the switching element is a jog switch, the first energy storage element is a first capacitor, and the second energy storage element is a second capacitor; the first end of the first capacitor is connected with the other end of the discharge resistor; the first end of the inching switch is respectively connected with the base electrode of the triode and the first end of the second capacitor, and the second end of the inching switch is connected with the first end of the first capacitor; the second end of the first capacitor and the second end of the second capacitor are both grounded.
6. The switch circuit according to any one of claims 1-5, further comprising a laser etching machine and a fan, wherein the first control element is further configured to control power on and off of the laser etching machine and the fan, and the first control element is further connected to the laser etching machine and the fan respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920608330.7U CN209913796U (en) | 2019-04-29 | 2019-04-29 | Switching circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920608330.7U CN209913796U (en) | 2019-04-29 | 2019-04-29 | Switching circuit |
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| CN209913796U true CN209913796U (en) | 2020-01-07 |
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| CN201920608330.7U Active CN209913796U (en) | 2019-04-29 | 2019-04-29 | Switching circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021143450A1 (en) * | 2020-01-14 | 2021-07-22 | 北京集创北方科技股份有限公司 | Switch control circuit, multiplexer switch circuit and control method for multiplexer switch control circuit |
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2019
- 2019-04-29 CN CN201920608330.7U patent/CN209913796U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021143450A1 (en) * | 2020-01-14 | 2021-07-22 | 北京集创北方科技股份有限公司 | Switch control circuit, multiplexer switch circuit and control method for multiplexer switch control circuit |
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