CN211609380U - Food processor with switch circuit - Google Patents
Food processor with switch circuit Download PDFInfo
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- CN211609380U CN211609380U CN201921071917.5U CN201921071917U CN211609380U CN 211609380 U CN211609380 U CN 211609380U CN 201921071917 U CN201921071917 U CN 201921071917U CN 211609380 U CN211609380 U CN 211609380U
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- 239000008267 milk Substances 0.000 description 1
- 210000004080 milk Anatomy 0.000 description 1
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Abstract
The application discloses a food processing machine with a switch circuit, which comprises a base and a processing assembly connected with the base, wherein a motor and a circuit unit are arranged in the base, the processing assembly comprises a cup body and a crushing device and/or a stirring device arranged in the cup body, the circuit unit comprises the switch circuit, the switch circuit comprises a power supply, a switch main circuit and a trigger self-locking circuit connected with the switch main circuit, and the switch main circuit comprises a key switch; the power supply is used for supplying power to the main circuit of the switch; the key switch is used for controlling the state of whether the switch main circuit is conducted or not; the switch main circuit is used for supplying power for triggering the self-locking circuit when the switch main circuit is in a conducting state; the trigger self-locking circuit is used for triggering and executing the locking of the conduction state of the switch main circuit after power supply is obtained. The application provides a food processor can realize standby zero power consumption and have the power-on self-locking function through its switch circuit.
Description
Technical Field
The application relates to the technical field of food processor electric control, in particular to a food processor with a switch circuit.
Background
The popularization of the food processor for kitchen brings great convenience to the life of people, such as a soybean milk machine, a broken-wall cooking machine, a juice extractor, a noodle maker and the like.
Electronic switches are often used in some food processors to turn off and on the power supply to the equipment, and the current electronic switches mainly include: analog electronic switches, relays, thyristors, etc. The analog electronic switch has small current and small working voltage range, so that the application range of the analog electronic switch is limited; if the relay is used as an electronic switch, the relay can work only by needing large current, and the requirement on working voltage is high; the thyristor has poor surge and overload resistance, is easy to burn out and has leakage current.
In view of this, a solution capable of reducing power consumption of the device in the standby state and improving the life of the power supply is required.
SUMMERY OF THE UTILITY MODEL
The embodiment of the application provides a food processor with a switch circuit, which is used for solving the following technical problems in the prior art: the electronic switch adopted by the existing food processor causes higher power consumption in a standby state and has adverse effect on the service life of a power supply.
The embodiment of the application adopts the following technical scheme:
a food processor with a switch circuit comprises a base and a processing assembly connected with the base, wherein a motor and a circuit unit are arranged in the base, the processing assembly comprises a cup body, a crushing device and/or a stirring device, the crushing device and/or the stirring device are/is arranged in the cup body, the circuit unit comprises the switch circuit and a power supply, the switch circuit comprises a switch main circuit and a trigger self-locking circuit connected with the switch main circuit, and the switch main circuit comprises a key switch;
the power supply is used for supplying power to the switch main circuit;
the key switch is used for controlling the state of the switch main circuit;
the switch main circuit is used for supplying power to the trigger self-locking circuit when the switch main circuit is in a conducting state;
the trigger self-locking circuit is used for triggering and locking the conduction state of the switch main circuit after power supply is obtained.
Optionally, the trigger self-locking circuit includes a trigger sub-circuit and a self-locking sub-circuit;
the output end of the switch main circuit is connected with the input end of the trigger sub-circuit;
the output end of the trigger sub-circuit is connected with a first port of the control chip, the input end of the self-locking sub-circuit is connected with a second port of the control chip, and the second port outputs signals according to the input signals of the first port, or the output end of the trigger sub-circuit is connected with the input end of the self-locking sub-circuit;
the trigger subcircuit is used for generating a trigger signal;
the self-locking sub-circuit is used for locking the conducting state of the switch main circuit under the triggering of the trigger signal.
Optionally, the switch main circuit includes a first switch device, the trigger sub-circuit includes a second switch device, and the first switch device and the second switch device are transistors or Metal Oxide Semiconductor (MOS) transistors;
the positive pole of the power supply is connected with the input end of the main switch circuit, the common end of the main switch circuit is connected with the common end of the trigger sub-circuit, the output end of the main switch circuit is connected with the input end of the trigger sub-circuit, the output end of the trigger sub-circuit is connected with the negative pole of the power supply, one end of the key switch is connected with the negative pole of the power supply, and the other end of the key switch is connected with the common end of the main switch circuit.
Optionally, the first switching device is a PNP-type first triode, the connection mode is common-base connection, and the main switching circuit further includes a first resistor and a second resistor;
one end of the first resistor is respectively connected with the anode of the power supply and the emitting electrode of the first triode;
the other end of the first resistor is respectively connected with one end of the second resistor and the base electrode of the first triode;
the other end of the second resistor belongs to the common end of the switch main circuit;
and the collector electrode of the first triode is connected with the input end of the trigger sub-circuit.
Optionally, the other end of the second resistor is connected to an anode of a first diode, and a cathode of the first diode is connected to a common terminal of the trigger sub-circuit.
Optionally, the other end of the key switch is connected to the cathode of the first diode and the common terminal of the trigger sub-circuit, respectively.
Optionally, the second switching device is a PNP-type second triode, the connection mode is common-base connection, and the trigger sub-circuit further includes a third resistor, a fourth resistor, and a fifth resistor;
an emitter of the second triode is connected with the output end of the main switch circuit;
the base electrode of the second triode is connected with one end of the third resistor;
the other end of the third resistor is respectively connected with the common end of the switch main circuit and the other end of the key switch;
a collector of the second triode is respectively connected with one end of the fourth resistor and one end of the fifth resistor;
the other end of the fourth resistor is used for outputting a corresponding trigger signal when the key switch acts;
the other end of the fifth resistor is connected with the negative electrode of the power supply and one end of the key switch respectively.
Optionally, the self-locking sub-circuit comprises a sixth resistor, a seventh resistor, an eighth resistor, a second diode, and an NPN-type third transistor, and the connection mode is common emitter connection;
one end of the sixth resistor is connected with the common end of the switch main circuit;
the other end of the sixth resistor is connected with a collector of the third triode;
an emitting electrode of the third triode is respectively connected with a negative electrode of the power supply, the other end of the fifth resistor, one end of the key switch and one end of the eighth resistor;
the base electrode of the third triode is respectively connected with one end of the seventh resistor and the other end of the eighth resistor;
the other end of the seventh resistor is connected with the cathode of the second diode;
and the anode of the second diode belongs to the input end of the self-locking sub-circuit.
Optionally, the other end of the fourth resistor is connected to the first port, and the anode of the second diode is connected to the second port;
and the second port outputs corresponding electrical level according to the trigger signal input by the first port so as to control the self-locking sub-circuit to work.
Optionally, in a state that the key switch is closed, the second port outputs a high level;
and under the state that the key switch is turned on, the second port outputs low level.
Optionally, the self-locking sub-circuit comprises a sixth resistor, a seventh resistor, an eighth resistor, a second diode, and an NPN-type third transistor, and the connection mode is common emitter connection;
one end of the sixth resistor is respectively connected with the base electrode of the first triode, the other end of the first resistor and one end of the second resistor;
the other end of the sixth resistor is connected with a collector of the third triode;
an emitting electrode of the third triode is respectively connected with a negative electrode of the power supply and one end of the eighth resistor;
the base electrode of the third triode is respectively connected with one end of the seventh resistor and the other end of the eighth resistor;
the other end of the seventh resistor is connected with the cathode of the second diode;
and the anode of the second diode belongs to the input end of the self-locking sub-circuit.
The embodiment of the application adopts at least one technical scheme which can achieve the following beneficial effects: the food processor provided by the application can realize zero standby power consumption and has a power-on self-locking function through the switching circuit; specifically, when the key switch is turned off (the key is not pressed), the whole circuit does not supply power, zero power consumption in a standby state is realized, and electric energy is saved; when the key switch is turned on (the key is pressed down), the switch main circuit is conducted, the conducted switch main circuit supplies power for the trigger self-locking circuit, and the trigger self-locking circuit triggers and locks the conducting state of the switch main circuit after power is supplied, so that the working state of the circuit is stabilized, and the service life of a power supply is prolonged.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
FIG. 1 is a schematic diagram of a portion of a food processor having a switching circuit according to some embodiments of the present application;
FIG. 2 is a schematic diagram of a portion of a circuit unit of the food processor of FIG. 1 according to an application scenario provided by some embodiments of the present application;
FIG. 3 is a schematic diagram of a switch circuit of the food processor of FIG. 1 in an application scenario provided by some embodiments of the present application;
FIG. 4 is a schematic diagram of a portion of a pin connection structure of a control chip of the food processor of FIG. 1 according to an application scenario provided by some embodiments of the present application;
FIG. 5 is a schematic diagram of another configuration of a switching circuit of the food processor of FIG. 1 in an application scenario provided by some embodiments of the present application;
FIG. 6 is a schematic diagram of another configuration of a switching circuit of the food processor of FIG. 1 in an application scenario provided by some embodiments of the present application;
in the figure, 1 base, 11 motor, 12 circuit unit, 121 power supply, 122 switch circuit, 1221 switch main circuit, 122a key switch, 1222 trigger self-locking circuit, 2 processing component, 21 cup, 22 stirring device and/or crushing device, Q1 first triode, Q2 second triode, Q3 third triode, R1 first resistor, R2 second resistor, R3 third resistor, R4 fourth resistor, R5 fifth resistor, R6 sixth resistor, R7 seventh resistor, R8 eighth resistor, D1 first diode, D2 second diode, C1 first capacitor, U control chip, M1 first MOS transistor, M3 third MOS transistor.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail and completely with reference to the following specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In order to solve the problems in the background art, the application provides a switching circuit and a food processor applying the switching circuit. It should be noted that the switch circuit can also be applied to electronic devices other than food processing machines, and when applied to portable electronic devices powered by batteries, the switch circuit can particularly show the advantages of the switch circuit, can effectively reduce the power consumption of the device in a standby state, and can prolong the service life of the batteries, and the circuit is small in size and facilitates integration.
Fig. 1 is a schematic diagram of a portion of a food processor with a switching circuit according to some embodiments of the present application.
The food processor in fig. 1 comprises a base 1 and a processing assembly 2 connected with the base 1, wherein a motor 11 and a circuit unit 12 are arranged in the base 1, the processing assembly 2 comprises a cup body 21 and a crushing device and/or a stirring device 22 arranged in the cup body 21, the circuit unit 12 comprises a switch circuit 122 and a power supply 121, the switch circuit 122 comprises a switch main circuit 1221 and a trigger self-locking circuit 1222 connected with the switch main circuit 1221, and the switch main circuit 1221 comprises a key switch 122 a; the power supply 121 is used for supplying power to the switch main circuit 1221; the key switch 122a is used for controlling the on/off state of the switch main circuit 1221; the switch main circuit 1221 is used for supplying power for triggering the self-locking circuit 1222 when the switch main circuit is in a conducting state; the trigger latch circuit 1222 is configured to trigger and execute latching of the conductive state of the switch main circuit 1221 after power supply is obtained.
The key switch 122a provides a user with direct operation, such as mechanical keys, touch keys, and the like. The main switch circuit 1221 may further include more complex switching devices capable of performing voltage control, where the switching devices have three or more terminals, an input terminal for inputting a voltage, an output terminal for outputting a voltage, and at least one control terminal, such as a triode, a MOS transistor, and the like.
The trigger self-locking circuit 1222 has a trigger function and a self-locking function based on trigger activation, and the two functions have a certain independence, so that the two functions can be implemented by two relatively independent sub-circuits, which are respectively called as a trigger sub-circuit and a self-locking sub-circuit, the trigger sub-circuit is used for generating a trigger signal, and the self-locking sub-circuit is used for performing locking on a conducting state of the switch main circuit under the trigger of the trigger signal.
The output of the trigger signal may be directly connected to the input of the latch circuit, so that it may be triggered directly. More nimble, also can be connected with other signal conversion parts between trigger signal's the output and the input of auto-lock sub-circuit, so, the design of auto-lock sub-circuit can be more free, and trigger signal passes through the conversion of signal conversion part, obtains the input signal with auto-lock sub-circuit adaptation to contact between can send the work of auto-lock sub-circuit. The following embodiments are mainly described by taking such indirect triggering schemes as examples.
Fig. 2 is a schematic diagram of a partial structure of a circuit unit of the food processor in fig. 1 in an application scenario provided by some embodiments of the present application.
In fig. 2, four parts are mainly included: power supply 121, switching circuit 122, control chip U, peripheral operating circuit. The power supply 121 is used for supplying power to the whole circuit, and the switch circuit 122 has zero standby power consumption and has a power-on self-locking function. When the key switch 122a in the switch circuit 122 is pressed by a user, a corresponding trigger signal is generated and sent to the control chip U, the control chip U detects the trigger signal and then outputs a signal to control the switch circuit 122 to realize conduction and self-locking, the power supply 121 also indirectly supplies power to the control chip U and the peripheral working circuit in a state that the switch circuit 122 is kept in conduction, and the peripheral working circuit can work under the control of the control chip U.
In some embodiments of the present application, the output terminal of the main switch circuit 1221 is connected to the input terminal of the trigger sub-circuit; the output end of the trigger sub-circuit is connected to the first port of the control chip U, the input end of the latch sub-circuit is connected to the second port of the control chip, and the second port outputs according to the input signal of the first port, or (for example, in some embodiments, the case will be described below), the output end of the trigger sub-circuit is connected to the input end of the latch sub-circuit.
The switch main circuit 1221 comprises a first switch device, the trigger sub-circuit comprises a second switch device, the self-locking sub-circuit comprises a third switch device, and the first switch device, the second switch device and the third switch device are triodes or MOS tubes; in this case, the control terminals of the first switching device, the second switching device and the third switching device may specifically be a common terminal in the input direction and the output direction, taking a triode as an example, when a connection mode of common emitter connection is adopted, the common terminal is an emitter, similarly, when a connection mode of common base connection is adopted, the common terminal is a base, when a connection mode of common collector connection is adopted, the common terminal is a collector, it should be noted that, in practical applications, each pole may also be connected in series with some corresponding elements, such as a resistor, a capacitor, a diode and the like, for requirements such as current limiting, filtering and the like, and for convenience of description, both ends of these elements connected in series may also be used to represent each pole accordingly, because they are all on the same side of the circuit. For example, if a circuit includes a transistor connected in common emitter and a resistor connected in series with the emitter, the common terminal of the circuit is the common terminal of the transistor and can be represented by the emitter of the transistor or both ends of the resistor.
Based on this, one connection mode of the switch circuit is: the positive pole of the power supply 121 is connected with the input end of the main switch circuit 1221, the common end of the main switch circuit 1221 is connected with the common end of the trigger sub-circuit, the output end of the main switch circuit 1221 is connected with the input end of the trigger sub-circuit, the output end of the trigger sub-circuit is connected with the negative pole of the power supply 121, one end of the key switch 122a is connected with the negative pole of the power supply 121, and the other end of the key switch 122a is connected with the common end of the main.
More specifically, fig. 3 is a schematic diagram of a switch circuit of the food processor of fig. 1 according to an application scenario provided by some embodiments of the present application.
In fig. 3, the first switching device is a PNP-type first transistor Q1 connected in a common-base connection manner, and the main switching circuit 1221 further includes a first resistor R1 and a second resistor R2; one end of the first resistor R1 is connected to the positive electrode of the power supply 121 and the emitter of the first transistor Q1; the other end of the first resistor R1 is respectively connected with one end of the second resistor R2 and the base electrode of the first triode Q1; the other end of the second resistor belongs to the common terminal of the main switch circuit 1221; the collector of the first transistor Q1 is connected to the input of the trigger sub-circuit.
The other end of the second resistor R2 is connected to the anode of the first diode D1, and the cathode of the first diode D1 is connected to the common terminal of the trigger sub-circuit. The first diode D1 acts as an isolation to prevent the base current of the second transistor Q2 from affecting the operation of the first transistor Q1.
The other end of the key switch 122a is connected to the cathode of the first diode D1 and the common terminal of the trigger sub-circuit.
The second switching device is a PNP type second triode Q2 which is connected in a common base connection mode, and the trigger sub-circuit further comprises a third resistor R3, a fourth resistor R4 and a fifth resistor R5; an emitter of the second transistor Q2 is connected to the output end of the main switch circuit 1221; the base electrode of the second triode Q2 is connected with one end of the third resistor R2; the other end of the third resistor R3 is connected to the common terminal of the switch main circuit 1221 and the other end of the key switch 122a, respectively; a collector of the second triode Q2 is respectively connected to one end of the fourth resistor R4 and one end of the fifth resistor R5; the other end of the fourth resistor R4 is used for outputting a corresponding trigger signal when the key switch 122a is actuated; the other end of the fifth resistor R5 is connected to the negative electrode of the power supply 121 and one end of the push switch 122a, respectively.
In some embodiments of the present application, the self-locking sub-circuit may include a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a second diode D2, and an NPN-type third transistor Q3, which are connected in a common emitter manner; one end of the sixth resistor R6 is connected to the common end of the main switch circuit 1221; the other end of the sixth resistor R6 is connected with the collector of the third triode Q3; an emitter of the third triode Q3 is respectively connected to a negative electrode of the power supply 121, the other end of the fifth resistor R5, one end of the key switch 122a, and one end of the eighth resistor R8; the base electrode of the third triode Q3 is respectively connected with one end of the seventh resistor R7 and the other end of the eighth resistor R8; the other end of the seventh resistor R7 is connected with the cathode of a second diode Q2; the anode of the second diode Q2 belongs to the input of the latch sub-circuit.
The other end of the fourth resistor R4 is connected with a first port of the control chip U, and the anode of the second diode D2 is connected with a second port of the control chip U; the second port outputs corresponding electrical level according to the trigger signal input by the first port so as to control the self-locking sub-circuit to work.
In a state where the key switch 122a is closed, the second port outputs a high level; in a state where the key switch 122a is turned on, the second port outputs a low level.
In some embodiments of the present application, the self-locking sub-circuit may include a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a second diode D2, and an NPN-type third transistor Q3, which are connected in a common emitter manner; one end of the sixth resistor R6 is respectively connected with the base of the first triode D1, the other end of the first resistor R1 and one end of the second resistor R2; the other end of the sixth resistor R6 is connected with the collector of the third triode Q3; an emitter of the third triode Q3 is respectively connected to a negative electrode of the power supply 121 and one end of the eighth resistor R8; the base electrode of the third triode Q3 is respectively connected with one end of the seventh resistor R7 and the other end of the eighth resistor R8; the other end of the seventh resistor R7 is connected with the cathode of the second diode D2; the anode of the second diode D2 belongs to the input of the latch sub-circuit.
In the description of fig. 3, the first port and the second port of the control chip U are mentioned, and in practical applications, the first port and the second port are specifically provided by which pin of the control chip U, and there are various possible schemes, and may also be affected by the specific model and the pin capability of the control chip U.
Further, some embodiments of the present application further provide a schematic diagram of a partial pin connection structure of a control chip of the food processor in fig. 1 in an application scenario, as shown in fig. 4.
In fig. 4, the 13 th pin of the control chip U provides the first port, the 3 rd pin provides the second port, the 1 st pin is respectively connected to ground and one end of the first capacitor C1, the 14 th pin is respectively connected to the other end of the first capacitor C1 and a power supply terminal provided by an output terminal of the switch main circuit 1221, and the power supply terminal may also be provided by the power supply 121.
In conjunction with the circuits of fig. 3 and 4, the operation of the circuit is as follows:
when the key switch 122a is not pressed, the emitter of the second transistor Q2 has no voltage, and the voltage of the power supply 121 is connected to the base of the second transistor Q2 through the first resistor R1, the second resistor R2, the first diode D1, and the third resistor R3. At this time, since the input terminal (i.e., POWER terminal) of the second diode D2 has no high-level control voltage input, the second transistor Q2 is non-conductive. Therefore, the circuit as a whole is in an off state and stands by zero power consumption.
When the key switch 122a is pressed, the voltage of the power supply 121 is divided by the first resistor R1 and the second resistor R2, so that the first transistor Q1 is turned on. After the first transistor Q1 is turned on, the collector of the first transistor Q1 outputs a voltage VCC to provide a working voltage for the control chip U and the emitter of the second transistor Q2. The base of the second transistor Q2 is connected to ground through a third resistor R3, and the second transistor Q2 is turned on. The voltage VCC is applied to the fifth resistor R5 for current limiting to generate a high level signal. The high level signal generates a trigger signal (i.e., KEY _ SI) through the fourth resistor R4 for current limiting, and the trigger signal is input to the 13 th pin of the control chip U. The control chip U reads the trigger signal, identifies the key operation mode of the user, and then controls the switch main circuit 1221 to be turned on and off.
The main control chip U2 reads that the trigger signal indicates that the key switch 122a is pressed, and outputs a high level signal POWER to the input terminal of the second diode D2 through the 3 rd pin, and the POWER signal is divided by the seventh resistor R7 and the eighth resistor R8 to drive the third transistor Q3 to be turned on. At this time, the first transistor Q1 is kept in a conducting state through the first resistor R1 and the sixth resistor R6, and the self-locking of the conduction of the first transistor Q1 is realized. When the control chip U reads that the trigger signal indicates that the key switch 122a is not pressed, the 3 rd pin outputs a low level signal POWER to the input terminal of the second diode D2, the third transistor Q3 is turned off, and the circuit enters a zero POWER consumption state.
Of course, the circuits in fig. 2 and 3 are not the only implementation ways to implement the solution of the present application, for example, the first diode D1 may be eliminated, one or more transistors may be replaced by MOS transistors, the second diode D2 may have only one diode instead of two diodes connected in parallel, some resistors for limiting current may be eliminated, and so on. More intuitively, see the examples of fig. 5, 6.
Fig. 5 is a schematic diagram of another configuration of a switch circuit of the food processor of fig. 1 in an application scenario provided by some embodiments of the present application. In fig. 5, compared with fig. 1, the first transistor Q1 is replaced by a first MOS transistor M1, and the third transistor Q3 is replaced by a third MOS transistor M3, so that the losses of the MOS transistors are smaller, the conduction voltage drop is also lower, and the reduction of the circuit energy consumption is facilitated.
Fig. 6 is a schematic diagram of another configuration of a switch circuit of the food processor of fig. 1 according to an application scenario provided by some embodiments of the present application. In fig. 6, compared to fig. 1, the first diode D1 is removed, and other parts are identical, thereby reducing the circuit cost.
The embodiments in the present application are described in a progressive manner, and the same and similar parts among the embodiments can be referred to each other, and each embodiment focuses on the differences from the other embodiments.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (10)
1. A food processor with a switch circuit comprises a base and a processing assembly connected with the base, wherein a motor and a circuit unit are arranged in the base, the processing assembly comprises a cup body and a crushing device and/or a stirring device arranged in the cup body, and the food processor is characterized in that the circuit unit comprises the switch circuit and a power supply, the switch circuit comprises a switch main circuit and a trigger self-locking circuit connected with the switch main circuit, and the switch main circuit comprises a key switch;
the power supply is used for supplying power to the switch main circuit;
the key switch is used for controlling the state of the switch main circuit;
the switch main circuit is used for supplying power to the trigger self-locking circuit when the switch main circuit is in a conducting state;
the trigger self-locking circuit is used for triggering and locking the conduction state of the switch main circuit after power supply is obtained.
2. The food processor having a switching circuit according to claim 1, wherein the trigger latching circuit comprises a trigger sub-circuit, a latching sub-circuit;
the output end of the switch main circuit is connected with the input end of the trigger sub-circuit;
the output end of the trigger sub-circuit is connected with a first port of the control chip, the input end of the self-locking sub-circuit is connected with a second port of the control chip, and the second port outputs signals according to the input signals of the first port, or the output end of the trigger sub-circuit is connected with the input end of the self-locking sub-circuit;
the trigger subcircuit is used for generating a trigger signal;
the self-locking sub-circuit is used for locking the conducting state of the switch main circuit under the triggering of the trigger signal.
3. The food processor having a switching circuit according to claim 2, wherein the switching main circuit includes a first switching device, the triggering sub-circuit includes a second switching device, and the first switching device and the second switching device are transistors or MOS transistors;
the positive pole of the power supply is connected with the input end of the main switch circuit, the common end of the main switch circuit is connected with the common end of the trigger sub-circuit, the output end of the main switch circuit is connected with the input end of the trigger sub-circuit, the output end of the trigger sub-circuit is connected with the negative pole of the power supply, one end of the key switch is connected with the negative pole of the power supply, and the other end of the key switch is connected with the common end of the main switch circuit.
4. The food processor of claim 3, wherein the first switching device is a first triode of PNP type connected in a common base connection, the main switching circuit further comprising a first resistor, a second resistor;
one end of the first resistor is respectively connected with the anode of the power supply and the emitting electrode of the first triode;
the other end of the first resistor is respectively connected with one end of the second resistor and the base electrode of the first triode;
the other end of the second resistor belongs to the common end of the switch main circuit;
and the collector electrode of the first triode is connected with the input end of the trigger sub-circuit.
5. The food processor having a switching circuit of claim 4, wherein the other end of the second resistor is connected to an anode of a first diode, and a cathode of the first diode is connected to a common terminal of the trigger sub-circuit.
6. The food processor having a switch circuit as claimed in claim 5, wherein the other end of the key switch is connected to the cathode of the first diode and the common terminal of the trigger sub-circuit, respectively.
7. The food processor of claim 3, wherein the second switching device is a second transistor of the PNP type connected in a common base connection, the trigger sub-circuit further comprising a third resistor, a fourth resistor, and a fifth resistor;
an emitter of the second triode is connected with the output end of the main switch circuit;
the base electrode of the second triode is connected with one end of the third resistor;
the other end of the third resistor is respectively connected with the common end of the switch main circuit and the other end of the key switch;
a collector of the second triode is respectively connected with one end of the fourth resistor and one end of the fifth resistor;
the other end of the fourth resistor is used for outputting a corresponding trigger signal when the key switch acts;
the other end of the fifth resistor is connected with the negative electrode of the power supply and one end of the key switch respectively.
8. The food processor as claimed in claim 7, wherein the self-locking sub-circuit comprises a sixth resistor, a seventh resistor, an eighth resistor, a second diode, and a third triode of NPN type, and the connection is a common emitter connection;
one end of the sixth resistor is connected with the common end of the switch main circuit;
the other end of the sixth resistor is connected with a collector of the third triode;
an emitting electrode of the third triode is respectively connected with a negative electrode of the power supply, the other end of the fifth resistor, one end of the key switch and one end of the eighth resistor;
the base electrode of the third triode is respectively connected with one end of the seventh resistor and the other end of the eighth resistor;
the other end of the seventh resistor is connected with the cathode of the second diode;
and the anode of the second diode belongs to the input end of the self-locking sub-circuit.
9. The food processor having a switching circuit according to claim 8, wherein the other end of the fourth resistor is connected to the first port, and the anode of the second diode is connected to the second port;
and the second port outputs corresponding electrical level according to the trigger signal input by the first port so as to control the self-locking sub-circuit to work.
10. The food processor with the switch circuit according to claim 2 or 9, wherein in a state where the key switch is closed, the second port outputs a high level;
and under the state that the key switch is turned on, the second port outputs low level.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921071917.5U CN211609380U (en) | 2019-07-10 | 2019-07-10 | Food processor with switch circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921071917.5U CN211609380U (en) | 2019-07-10 | 2019-07-10 | Food processor with switch circuit |
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| CN211609380U true CN211609380U (en) | 2020-10-02 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113282159A (en) * | 2021-07-22 | 2021-08-20 | 深圳市视晶无线技术有限公司 | Switch control system for zero current standby of embedded controller |
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2019
- 2019-07-10 CN CN201921071917.5U patent/CN211609380U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113282159A (en) * | 2021-07-22 | 2021-08-20 | 深圳市视晶无线技术有限公司 | Switch control system for zero current standby of embedded controller |
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