CN215009646U - Hand-held type domestic power consumption sword circuit - Google Patents
Hand-held type domestic power consumption sword circuit Download PDFInfo
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- CN215009646U CN215009646U CN202120432904.7U CN202120432904U CN215009646U CN 215009646 U CN215009646 U CN 215009646U CN 202120432904 U CN202120432904 U CN 202120432904U CN 215009646 U CN215009646 U CN 215009646U
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Abstract
The utility model provides a hand-held type domestic electric sword circuit, including the electrotome body, the setting is at the inside control circuit of electrotome body and by control circuit drive control's electrotome motor, control circuit is including the intelligent charging circuit who is used for overcharge protection and temperature monitoring to charge, an electric quantity LED lamp display circuit for charge indication, main control circuit, an electric sword motor control circuit for controlling electrotome pivoted hand-held type uses switch circuit and is used for feedback voltage to follow and control electrotome motor rotational speed, intelligent charging circuit is electric quantity LED lamp display circuit respectively, main control circuit and hand-held type use switch circuit power supply, main control circuit respectively with electric quantity LED lamp display circuit, hand-held type uses switch circuit power supply and electrotome motor control circuit to be connected. The utility model is provided with an intelligent charging circuit, which prevents the battery from being charged to be damaged, prolongs the service life of the battery and stops charging when the temperature is ultrahigh or abnormal; the feedback voltage follows, and the speed of the electrotome motor is effectively prevented from being influenced by the voltage change.
Description
Technical Field
The utility model relates to a domestic electrotome technical field especially relates to a hand-held type domestic electrotome circuit.
Background
People often need a cutter to cut articles in daily life, and most people in the prior art use a motor-driven electric knife. The existing household electric knife has no temperature monitoring and charging function and can not effectively prevent the voltage change of a battery from influencing the speed of a motor when in use.
SUMMERY OF THE UTILITY MODEL
To the defect that exists among the prior art, the utility model aims at providing a hand-held type domestic electric knife circuit has solved current domestic electric knife and has not had the temperature monitoring function of charging and can not effectively prevent the technical defect that the voltage height of battery changes the speed that influences the motor when using.
In order to achieve the above purpose, the utility model adopts the following specific technical scheme:
the utility model provides a hand-held type domestic electric sword circuit, is in including electric sword body, setting the inside control circuit of electric sword body and by control circuit drive control's electric sword motor, control circuit is including being used for overcharging protection and the intelligent charging circuit that the temperature monitoring charges, the electric quantity LED lamp display circuit that is used for charging instruction, master control circuit, the electric sword motor control circuit who is used for controlling electric sword pivoted handheld use switch circuit and is used for feedback voltage to follow and control electric sword motor rotational speed, intelligent charging circuit does respectively electric quantity LED lamp display circuit, master control circuit and handheld use switch circuit power supply, master control circuit uses switch circuit power supply and electric sword motor control circuit with electric quantity LED lamp display circuit, handheld respectively and is connected.
Preferably, the intelligent charging circuit comprises a charging circuit and an overcharge protection circuit connected with the charging circuit.
Preferably, the charging circuit includes a charging socket for connecting direct current, a charging management chip, a thermistor, a rechargeable battery and a filter capacitor, the input of the charging management chip is connected to the output of the charging socket, the charging resistor for adjusting the magnitude of the charging current is connected to the CS pin of the charging management chip, the VT pin of the charging management chip is connected to the thermistor, the DRC pin of the charging management chip is connected to the charging control switch tube, the BATT pin of the charging management chip is connected to the rechargeable battery, and the filter capacitor is arranged at the input of the charging management chip and the input of the rechargeable battery.
Preferably, the overcharge protection circuit is composed of an overcharge protection chip TC 2120.
Preferably, the electric quantity LED lamp display circuit comprises a battery voltage detection circuit, an external direct current voltage detection circuit and an LED circuit, and the battery voltage detection circuit, the external direct current voltage detection circuit and the LED circuit are all connected with the main control circuit.
Preferably, the main control circuit comprises a voltage conversion circuit and a main control chip, and the voltage conversion circuit converts external direct current into 5V direct current voltage and transmits the voltage to the main control chip.
Preferably, the hand-held use switch circuit comprises a switch.
Preferably, the electrotome motor control circuit comprises a capacitor circuit connected with the output end of the switch, a motor connected with the output end of the capacitor circuit, and a PWM drive circuit connected with the main control circuit, and the PWM drive circuit is connected with the motor.
The beneficial effects of the utility model reside in that: the intelligent charging circuit is arranged to prevent the battery from being damaged by charging, so that the service life of the battery is longer, and the charging is stopped when the temperature is ultrahigh or abnormal; the feedback voltage follows, and the speed of the electrotome motor is effectively prevented from being influenced by the voltage change of the battery during use.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that 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 according to these drawings without creative efforts.
Fig. 1 is a schematic block diagram of a circuit of a handheld household electric knife provided in an embodiment of the present invention;
fig. 2 is a schematic circuit diagram of a handheld household electrical knife circuit according to an embodiment of the present invention.
In the figure, 1-an intelligent charging circuit, 2-an electric quantity LED lamp display circuit, 3-a main control circuit, 4-a handheld use switch circuit and 5-an electrotome motor control circuit.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, other embodiments obtained by a person of ordinary skill in the art without creative work all belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
As shown in figures 1 and 2, the utility model provides a hand-held household electric knife circuit, which comprises an electric knife body, a control circuit arranged in the electric knife body and an electric knife motor driven and controlled by the control circuit, wherein the electric knife body is the prior art, the control circuit comprises an intelligent charging circuit 1 for overcharge protection and temperature monitoring charging, an electric quantity LED lamp display circuit 2 for charge indication and a main control circuit 3, a electrotome motor control circuit 5 for controlling electrotome pivoted hand-held type uses switch circuit 4 and is used for feedback voltage to follow and control electrotome motor rotational speed, and intelligent charging circuit 1 uses switch circuit 4 power supply for electric quantity LED lamp display circuit 2, main control circuit 3 and hand-held type respectively, and main control circuit 3 uses switch circuit 4 power supply and electrotome motor control circuit 5 to be connected with electric quantity LED lamp display circuit 2, hand-held type respectively.
Preferably, the intelligent charging circuit 1 includes a charging circuit and an overcharge protection circuit connected to the charging circuit. The charging circuit comprises a charging socket for connecting direct current, a charging management chip, a thermistor, a rechargeable battery and a filter capacitor, wherein the output end of the charging socket is connected with the input end of the charging management chip, the CS pin of the charging management chip is connected with the charging resistor for adjusting the magnitude of charging current, the VT pin of the charging management chip is connected with the thermistor, the DRC pin of the charging management chip is connected with a charging control switch tube, the BATT pin of the charging management chip is connected with the rechargeable battery, and the filter capacitor is arranged at the input end of the charging management chip and the input end of the rechargeable battery. The overcharge protection circuit is composed of an overcharge protection chip TC 2120.
J1 is the socket of the DC plug of the electric knife, and the DC POWER of the external input POWER _ IN can make the circuit work. U2 is a management IC of two rechargeable batteries, wherein the resistance of R6 can set the charging current. The thermistor NTC is used for temperature monitoring during charging, and U2 stops charging immediately when the temperature is too high or abnormal, so as to prevent damage to the circuit or damage to the rechargeable battery. The U2 pin 8 is external rechargeable battery, and when charging voltage charged to 8.4-8.6V, the chip pin 5 high potential becomes low potential, Q1 stop working, the completion of charging, prevent that overcharging makes the battery life-span more permanent. The 3 rd pin of U2 is a charge control terminal, and when the pin is high, U2 starts to operate, and when the pin is low, U2 stops operating. Wherein, the C2 and the C5 are used as the filtering function of the input power supply, and the EMC and EMI interference is effectively reduced. Wherein C8, C9 are as the filtering of battery, effectively reduce power ripple and influence power supply circuit. U4, R10, C10, C6, Q2, R11, R13 and F1 form an overcharge protection circuit. In normal charging process, Q2 and Q3 are conducted, and current flows to B1 BAT-2S for charging. Wherein protection IC U4 pin 6 is as the battery detection foot, and the 2 nd pin of U4 becomes the low potential by the high potential when detecting 4.25V, and Q2 ends out of work to make the battery no longer charge, effectively protect the battery, make battery life more permanent.
Preferably, the electric quantity LED lamp display circuit 2 comprises a battery voltage detection circuit, an external direct current voltage detection circuit and an LED circuit, and the battery voltage detection circuit, the external direct current voltage detection circuit and the LED circuit are all connected with the main control circuit 3. The main control circuit 3 comprises a voltage conversion circuit and a main control chip, and the voltage conversion circuit converts external direct current into 5V direct current voltage and transmits the voltage to the main control chip. The LED1 is an electric quantity indicator light of the handheld electric knife, the U3 starts to work by externally inputting direct current of POWER _ IN, stable 5V is output to supply POWER to a system, meanwhile, the 5 th pin of the main control U1 detects a level value, the main control circuit 3U1 is made to know that charging is carried out, the 7 th pin judges the high bottom of a battery value, and the U1 works. When the master U1 detects that the voltage value of the 7 th pin is a charging value, the 6 th pin always outputs a high level to provide a high potential to the charging IC U2 through the R12, and the U2 works to charge current. Meanwhile, the MCU U1 No. 2 foot of the system controls the charging LED lamp to flash slowly, and the user is prompted to charge the battery at present. When the U1 detects that the voltage value of pin 7 is the full charge value of the battery, pin 6 will change from high to low, pin 3 of the charging IC U2 is pulled low, U2 does not work, and the battery is not charged. Meanwhile, the 2 nd foot of the system main control circuit 3U1 controls the charging LED lamp to be turned from slow flashing to long flashing, and the charging of the user is prompted to be completed.
Preferably, the hand-held use switch circuit 4 includes a switch S1. S1 is a hand-held use switch, long open state. When a user uses the electrotome, the user holds the position of an external switch S1 of the electrotome and presses downwards to switch on the switch, the internal battery supplies power to the system U3 and the VDD motor, so that the motor rotates to drive a mechanical rotating structure in the electrotome, and the electrotome normally works. When the user holds the external switch S1 of the electric knife to be loosened, the BATTY voltage is disconnected, the power is not supplied to the system U3 and the motor VDD, and the electric knife does not work. The electric knife can be effectively prevented from being damaged to people or other articles when the electric knife is put down.
Preferably, the electrotome motor control circuit 5 comprises a capacitor circuit connected to the output of the switch, a motor connected to the output of the capacitor circuit, and a PWM drive circuit connected to the main control circuit 3, the PWM drive circuit being connected to the motor. U1, C1, C7, D1, Q11, R36, R1, R2, R3, C3 and motors M-, M +, which form a motor control circuit. When a user uses the electrotome, the user holds the position of an external switch S1 of the electrotome and presses down to switch on the switch, an internal battery supplies power to the system U3 and the VDD motor, the 3 rd pin of the system main control U1 outputs a duty ratio control signal to control the Q11 to be switched on, and the motor rotates to drive a mechanical rotating structure in the electrotome to enable the electrotome to normally work. In order to control the motor to stabilize the rotation speed, a resistor R3 is connected to the source of the Q3 to extract a sampling signal, and the sampling signal is connected to the 4 th pin of the master U1. The motor rotation speed is not influenced by the VDD voltage to change by the real-time detection control in the main control U1, so that the stable rotation speed is controlled.
The beneficial effects of the utility model reside in that:
1: the built-in intelligent charging circuit: the overcharge protection circuit prevents the battery from being damaged by charging, so that the service life of the battery is longer. And (4) monitoring the charging temperature, and stopping charging when the temperature is ultrahigh or abnormal.
2: electric quantity LED lamp display circuit: when charging, the LED indicator light flashes slowly, the electric quantity is full and the LED indicator light is on when full, and when the electric quantity of the battery is running out, the LED indicator light flashes quickly to remind the user of charging.
3: hand-held use switch circuit: the electric knife is pressed down to work, and the hand is loosened to stop working, so that the electric knife is effectively prevented from damaging people or other objects when working.
4: electrotome motor control circuit: the feedback voltage follows, so that the processing chip controls the rotating speed of the electrotome motor. The intelligent control circuit can effectively prevent the motor speed from being influenced by the voltage change of the battery during use.
In light of the foregoing description of the preferred embodiments of the present invention, those skilled in the art can now make various alterations and modifications without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (8)
1. The utility model provides a hand-held type domestic electric sword circuit, is in including electric sword body, setting the inside control circuit of electric sword body and by control circuit drive control's electric sword motor, a serial communication port, control circuit is including being used for overcharging protection and the intelligent charging circuit that temperature monitoring charges, the electric quantity LED lamp display circuit that is used for charging instruction, master control circuit, the electric sword motor control circuit who is used for controlling electric sword pivoted handheld use switch circuit and is used for feedback voltage to follow and control electric sword motor rotational speed, intelligent charging circuit does respectively electric quantity LED lamp display circuit, master control circuit and handheld use the switch circuit power supply, master control circuit uses switch circuit power supply and electric sword motor control circuit with electric quantity LED lamp display circuit, handheld respectively and is connected.
2. The hand-held household electric knife circuit of claim 1, wherein the intelligent charging circuit comprises a charging circuit and an overcharge protection circuit connected with the charging circuit.
3. The handheld household electric knife circuit of claim 2, characterized in that the charging circuit comprises a charging socket for connecting direct current, a charging management chip, a thermistor, a rechargeable battery and a filter capacitor, wherein an output end of the charging socket is connected with an input end of the charging management chip, a CS pin of the charging management chip is connected with the charging resistor for adjusting the magnitude of the charging current, a VT pin of the charging management chip is connected with the thermistor, a DRC pin of the charging management chip is connected with a charging control switch tube, a BATT pin of the charging management chip is connected with the rechargeable battery, and the filter capacitor is arranged at an input end of the charging management chip and an input end of the rechargeable battery.
4. The hand-held household electric knife circuit as claimed in claim 2, characterized in that the overcharge protection circuit is composed of an overcharge protection chip TC 2120.
5. The hand-held household electric knife circuit according to claim 1, wherein the electric quantity LED lamp display circuit comprises a battery voltage detection circuit, an external direct current voltage detection circuit and an LED circuit, and the battery voltage detection circuit, the external direct current voltage detection circuit and the LED circuit are all connected to the main control circuit.
6. The handheld household electric knife circuit as claimed in claim 1, wherein the main control circuit comprises a voltage conversion circuit and a main control chip, and the voltage conversion circuit converts an external direct current into a 5V direct current voltage and transmits the voltage to the main control chip.
7. A hand-held domestic electric knife circuit according to claim 1, wherein said hand-held use switch circuit comprises a switch.
8. The hand-held household electrical knife circuit of claim 7, wherein the electrical knife motor control circuit comprises a capacitor circuit connected to the output of the switch, a motor connected to the output of the capacitor circuit, and a PWM drive circuit connected to the main control circuit, the PWM drive circuit being connected to the motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120432904.7U CN215009646U (en) | 2021-02-26 | 2021-02-26 | Hand-held type domestic power consumption sword circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120432904.7U CN215009646U (en) | 2021-02-26 | 2021-02-26 | Hand-held type domestic power consumption sword circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215009646U true CN215009646U (en) | 2021-12-03 |
Family
ID=79158292
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120432904.7U Active CN215009646U (en) | 2021-02-26 | 2021-02-26 | Hand-held type domestic power consumption sword circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215009646U (en) |
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2021
- 2021-02-26 CN CN202120432904.7U patent/CN215009646U/en active Active
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Address after: Room 101, No. 11-1, Gufeng 1st Road, Xintian Community, Guanhu Street, Longhua District, Shenzhen, Guangdong 518000 Patentee after: Shenzhen Julide Electronics Co.,Ltd. Address before: 518000 101201301 and 101201301401, no.11-1, Gufeng 1st Road, Xintian community, Guanhu street, Longhua District, Shenzhen City, Guangdong Province Patentee before: SHENZHEN JULIDE ELECTRONICS Co.,Ltd. |