WO2009065280A1

WO2009065280A1 - An electric shaver with an led/lcd speed display

Info

Publication number: WO2009065280A1
Application number: PCT/CN2008/000186
Authority: WO
Inventors: Guangrong Song
Original assignee: Guangrong Song
Priority date: 2007-11-23
Filing date: 2008-01-25
Publication date: 2009-05-28
Also published as: CN201122924Y

Abstract

An electric shaver with an led/lcd speed display comprises a power circuit module, a motor module, a motor-driving module, a motor-detecting module, a charge control module, a module for sampling electric quantity of a self-provided power source, a temperature sampling module, a displayer, a MCU control circuit module and a motor-detecting circuit module. The motor-detecting module and the motor module are electrically connected to the MCU control circuit module so that the motor-detecting module can feed the detected potential signal into the MCU control circuit module and the MCU control circuit module can control the motor-driving module to control the speed and the output power by controlling the duty ratio of the output square wave and the frequency according to obtained signals, and the led or lcd of a display module can directly display them. The electric shaver can prevent the speed of a cutter head from varying because of resistance so that it can avoid clipping hair and ensure the normal operation.

Description

LED/LCD speed display clipper

Technical field

The invention relates to an electric clipper which can be used for haircutting, shaving, shearing and the like, and mainly relates to an LED/LCD speed display electric clipper. In particular, it refers to an electric clipper that can sense the automatic control of the motor output power through the MCU control and can be visually displayed through LED or LCD. Background technique

It is well known that electric hair clippers have a wide range of uses in people's daily production and life, such as haircutting, shaving or shearing. Traditional electric hair clippers (including hair clippers, electric razors, electric wool clippers, etc.) are usually a kind of mechanical movement that supplies power to the motor through AC or DC (battery) power, and drives the electric shears. , to get a haircut, shave or cut hair. A series of electric clippers are unstable in actual work, because the electric clippers are affected by factors such as changes in driving speed, changes in power supply voltage, and changes in load (cutting amount). Because the above-mentioned electric clipper has no power supply control and motor dynamic drive control function, it is often encountered that when the resistance of the electro-pneumatic scissors head driven by the motor is greater than the expected normal value or the power supply voltage is decreased during use, the motor outputs in the circuit. The power will also drop, or the load (scissors and scissors) will increase beyond the maximum power of the motor, which will cause the clipper to be pinched and jammed, which will affect the normal use of the clipper. When the resistance of the electro-pneumatic scissors head is greater than the expected normal value, the user has no way, so that the electric clipper cannot be used normally, and the hairdresser feels uncomfortable. Summary of the invention

In order to overcome the above drawbacks, an object of the present invention is to provide an automatic control of motor output power by induction through an MCU control. The electric clippers of various working states are visually displayed through the LED or LCD of the display module.

The object of the present invention is achieved by the following technical solutions:

The electric clipper of the invention mainly comprises an electric clipper body, and the clip body has display parts (LED, LCD) and a main body The front part is a push-pull head, and the electric clipper circuit further includes a display module, an MCU (U1.), a control circuit module, a power circuit module, a motor module, a motor drive module, and a motor. The detection module, a charging control module, a self-contained power supply sampling module, and a temperature sampling module.

The MCU control circuit module is electrically connected to all other modules by a peripheral circuit:

The motor detection circuit module is electrically connected to the motor module and the MCU control circuit module, and the motor detection circuit module inputs the detected electromotive force signal of the motor into the MCU control circuit module:

The MCU control circuit module controls the motor speed and output power according to the obtained signal through the duty cycle and frequency of the control output square wave. It is then visually displayed through the LED or LCD of the display module.

In the above electric clipper circuit, wherein:

The MCU control circuit module of the electric clipper circuit is mainly composed of an MCU and its necessary peripheral circuits, such as:

The MCU power processing circuit and the manual reset circuit; the MCU is electrically connected to each module by a peripheral circuit, and the MCU obtains the electromotive force signal of the motor from the motor detection circuit module, and the MCU processes the calculated electromotive force signal of the motor, and controls the output square wave. The ratio and frequency are used to control the speed and output power of the motor. The MCU also obtains the signals of each module after processing and calculation, and inputs them into the display circuit module for displaying various working states of the entire electric clipper circuit.

The MCU is a microcontroller chip or other microprocessor that has a built-in processing program written in code to perform corresponding operations.

The electric clipper circuit also includes a display circuit module.

The display circuit module is electrically connected to the MCU control circuit module for displaying various working states of the entire electric clipper circuit.

The motor detection circuit module of the electric clipper circuit is mainly composed of a first resistor R33 connected to the M-terminal of the motor and connected to the MCU control circuit module, a second resistor R32 and a first capacitor C10 connected in series with the third resistor R31. The first resistor R7, the second resistor R8 and the first capacitor C2 are connected to the other end of the motor M and connected to the MCU control circuit module. The first resistor R33 and the second resistor R32 are connected in series, one end of the first resistor R33 is electrically connected to the motor M-terminal 1, the first resistor R33 and the second resistor R32 are connected in series with another end grounded, and the other end of the third resistor R31 is The first capacitor C10 is electrically connected, the first capacitor C10 is grounded at the other end; the third resistor R31 is connected to the MCU control circuit module; the first resistor R7 electrically connected to the other end 2 of the motor M is grounded at the other end, the second resistor R8 and the first The capacitor C2 is connected to the MCU control circuit module, and the other end of the capacitor C2 is grounded. In addition to measuring the electromotive force by the motor detection circuit module, the MCU control circuit module can also be used to measure the armature current, determine the magnitude of the load, and ensure that the motor outputs in real time. The power required.

The collector of the first transistor Q1 is electrically connected to the other end 2 of the motor M, and the emitter of the first transistor Q1 is connected to the MCU control circuit module.

The display circuit module of the above electric clipper circuit is electrically connected to the MCU control circuit module, and can be composed of a light emitting diode or a liquid crystal display module.

The power circuit module of the above-mentioned electric clipper circuit mainly comprises: an alternating current transformer rectifying part, a charging power detecting part, and a charging execution part; wherein, the alternating voltage transformer rectifying part converts 220V alternating current into direct current for charging The charging power detecting part and the MCU control circuit module together test whether there is a charging power supply and a charging voltage, and then input the obtained signal into the MCU through the MCU operation to determine whether to let the charging execution part work.

The charging power detecting portion is mainly composed of a voltage and current detecting module connected to the MCU control circuit module circuit of the rechargeable battery. The above-mentioned electric clipper motor detecting circuit voltage module is mainly composed of a first resistor R1 connected to the battery BT end, The second resistor R2 is connected to the third resistor R20 and the MCU digging circuit module, and the other end of the first capacitor C9 and the second resistor R2 is grounded; the electric clipper battery detecting circuit current module is mainly connected to the BT end of the battery. The first resistor R14, the second resistor R28 and the third resistor R13 are connected to the MCU control circuit module, and the other ends of the first capacitor C4 and the third resistor R27 are grounded.

The MCU measures whether there is a charging power supply and a charging voltage, and then the MCU controls whether to charge. When the MCU detects that the voltage is driven to balance, the charging or turbulence is stopped. The charging execution portion is mainly composed of a first transistor Q1, a second transistor Q3, a first resistor R5, a second resistor R4, and a third resistor R3, wherein the collector of the second transistor Q3 passes through the first resistor R5 and the MCU control circuit. The MCU of the module is electrically connected, the emitter of the second transistor Q1 is electrically connected to the first diode D1, and the base of the second transistor Q1 is electrically connected to the ground of the third resistor R3 and the capacitor C1; the first transistor Q1 The collector is connected to the battery through R3, the emitter of the first product tube Q3 is connected to the negative electric signal input end of the whole circuit; the opposite end connected in series with the first resistor R5 is electrically connected with the MCU of the MCU control circuit module; The wave controls the first transistor Q1 to be turned on or off to control the charging voltage of the battery BT to achieve basic constant current charging.

The first transistor Q1 and the second transistor Q3 form an oscillating circuit to cause the input DC power to pulsate. After the DC power passes through the MCU in the MCU control circuit module, the square wave is formed, and the square wave can change the average value according to the MCU adjustment to realize charging. The voltage changes to achieve basic constant current charging to extend battery life and enhance charging.

The invention has the beneficial effects that the user can know the various working states (battery state, state of charge, load state) of the electric clipper circuit through the display circuit module, and the motor is controlled by the MCU. The output power of the MCU control circuit module controls the rotation speed and output power of the motor according to the duty cycle and frequency of the control output square wave according to the obtained signal; the output power of the motor can be automatically adjusted according to the load of the motor to ensure the motor drive The rotation speed of the electro-pneumatic scissors head does not change due to the resistance it receives, so that the phenomenon of pinching and jamming during use is largely avoided, and the normal use of the electric clipper can be ensured. Very practical and convenient.

For ease of description, the present invention is described in detail by the following preferred embodiments and the accompanying drawings. DRAWINGS

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic circuit diagram of one of the present invention, which can be displayed by LED / LCD.

Fig. 2 is a schematic diagram of another circuit of the present invention, which can be displayed by LED.

Figure 3 is a block diagram showing the flow of the working process of the present invention.

Figure 4 is a block diagram of the charging mode of Figure 3.

Figure 5 is a block diagram showing the operation mode of Figure 3. Figure 6 is a block diagram of the circuit of Figure 3.

detailed description

The present invention will be further described below in conjunction with the accompanying drawings:

Please refer to the block diagram of the electric clipper circuit shown in FIG. 6, which mainly includes a power circuit module 1, a charging module 2, a self-contained power module 3, a motor driving module 4, a motor module 5, an MCU control circuit module 6, and a display circuit module 7. , power detection module 8, motor detection circuit module 9.

The working process of the invention comprises two modes of charging and working (as shown in Fig. 3-5), and the charging mode has a battery voltage, a power sampling function and a charging control function, and can display the power and charging process display, and protect the overcharged temperature detection. Function; working mode has motor drive function, motor sampling function (motor voltage signal and current signal) and microprocessor control, the microprocessor detects the power and motor load (cutter head) changes in real time, so that the scissors maintain a constant speed or pass Increasing the voltage and current causes the scissors to automatically apply force and display the motor power change on the LCD display. The working modes include dynamic and automatic.

Wherein, the MCU control circuit module 6 is electrically connected to all other modules by using a peripheral circuit;

The motor module 5 and the motor detection circuit module 9 are electrically connected to the MCU control circuit module 6, and the motor detection circuit module 9 inputs the detected electromotive force signal of the motor into the MCU control circuit module 6;

The MCU control circuit module 6 controls the motor drive module according to the obtained signal through the duty ratio and frequency of the control output square wave. 4 Controls the rotational speed and output power of the motor module 5:

The display circuit module 7 is electrically connected to the MCU control circuit module 6 for displaying various working states (battery state, state of charge, load state) of the entire electric clipper circuit;

The power circuit module 3 is electrically connected to the MCU control circuit module 6 through the motor detection circuit module 8, and the MCU control circuit module 6 controls whether the charging module 2 charges the power module 3, and the power module 3 provides power of the entire electric clipper circuit, and the power circuit Module 3 is controlled by MCU control circuit module 6.

1 is a schematic diagram of a specific circuit of a preferred embodiment of the electric clipper circuit of the present invention. The MCU control circuit module of the electric clipping circuit in Fig. 2 is mainly composed of an MCU and its necessary peripheral circuits, mainly including: MCU (Ul), MCU power processing circuit and manual reset circuit; wherein: MCU power processing circuit is mainly composed of a transistor Q1, a second transistor Q3, a first resistor R21, a second resistor R8, a third resistor R9, a fourth resistor RI0, and a first diode D7; the manual reset circuit is mainly composed of the first switch SWI, SW2, a capacitor C6, a second capacitor C4, a first resistor R6, and a second inductor L1; the MCU is electrically connected to each module by a peripheral circuit, and the MCU obtains an electromotive force signal of the motor M from the motor detection circuit module, and the MCU obtains the motor M After the electromotive force signal is processed, the duty cycle and frequency of the output square wave are controlled to control the rotation speed and output power of the motor M. The MCU also obtains the signals of the respective modules after processing and calculation, and inputs them into the display circuit module for displaying the whole. Various working states of the electric clipper circuit.

The display circuit module mainly comprises five light emitting diode groups, namely: a first light emitting diode D1, a second light emitting diode D2, a third light emitting diode D3, a fourth light emitting diode D4, and a fifth light emitting diode D5; wherein five light emitting diodes The three signal inputs are connected and are connected to the I/O of the MCU.

The motor detection circuit module of the above electric clipper circuit is mainly composed of a first resistor R12 connected to the M-terminal of the motor, a second resistor R11 and a first capacitor C7 connected in parallel with the second resistor R11, and the other end connected to the MCU control circuit module. a first resistor R18 connected to the other end of the motor M, a second resistor R19 and a first capacitor C12 connected in parallel with the second resistor R19 are connected to the MCU control circuit module, and the other end is grounded, and the two blocks together form a motor voltage and current detection. Module

The motor MCU control module of the above-mentioned electric clipper circuit is mainly connected by the collector of the first transistor Q5 connected to the M-terminal of the motor, and the base of the first transistor Q5 is connected with the collector R23 and the collector of the second transistor Q2, The base of the two-transistor Q2 is connected to the I/O port of the MCU in the MCU control circuit module through R3; the MCU control circuit module can be used to measure the armature current and determine the magnitude of the load, in addition to measuring the electromotive force by the motor detection circuit module. The motor speed is controlled by the motor MCU control module to ensure that the motor output power is constant. The charging power detecting portion is mainly composed of a circuit for charging and detecting the charging and detecting module in the MCU control circuit module, wherein the detecting module of the MCU detects whether the charging power source exists and the charging battery voltage level, and then the charging is controlled by the MCU. Whether the module is charging, when the MCU detects that the voltage is driving, it stops charging or turbulence.

The power circuit module of the electric clipper circuit mainly comprises: an AC variable voltage rectifying part (not shown), a charging power detecting part, a charging executing part, and a power switching part; wherein, the alternating voltage converting part The 220V AC power is converted into DC power for charging. The charging power detecting part and the MCU control circuit module test whether there is a charging power supply and a charging battery voltage, and then input the obtained signal into the MCU through the MCU operation to determine whether to perform charging execution. Part of the work.

The charging execution part is mainly composed of two transistors Q3 and Q1 and resistors R12, R8, R9 and RIO, wherein the base of the first transistor Q1 is electrically connected to the I/O port of the MCU of the MCU control circuit module through the RI0, and the second transistor The collector of Q3 is connected to the rechargeable battery, the emitter of the first transistor Q1 is grounded, the emitter of the first transistor Q1 is connected to the negative electrical signal input end of the entire circuit; the square wave is generated by the MCU, and the second transistor Q1 is controlled to be turned on or off. To control the charging voltage of the battery BT, to achieve basic constant current charging.

The second transistor Q3 and the first transistor Q1 form an oscillating circuit to pulsate the input direct current. After the direct current passes through the MCU in the MCU control circuit module, the square wave is formed, and the square wave can change its average value according to the MCU adjustment to realize charging. The voltage changes to achieve basic constant current charging to extend battery life and enhance charging.

The present invention provides two sets of technical implementations, one of which can have both LED or LCD display functions (as shown in Figure 1), and the other set only has LED display functions (as shown in Figure 2).

All the substitutions and improvements made on the basis of the present invention are within the scope of the present invention.

Claims

1. An LED/LCD speed display electric clipper, mainly comprising an electric clipper body, an electric clipper head at the front end of the main body, a motor and a circuit, wherein: the circuit comprises a (MCU) control circuit module and a motor a detection circuit module, a power detection circuit module, a charging circuit module, a temperature detecting circuit module, a motor driving circuit module, and a display module; wherein: (MCU) control circuit module is electrically connected with other modules by a peripheral circuit; The circuit module is electrically connected to the motor module and the (MCU) control circuit module, and the motor detection circuit module inputs the detected electromotive force signal of the motor into the (MCU) control circuit module; the power detection circuit module and the battery and (MCU) control circuit module Electrical connection, the power detection circuit module inputs the detected external power source and the battery voltage signal into the (MCU) control circuit module; the temperature detection circuit module is electrically connected with the (MCU) control circuit module, and the temperature detection circuit module detects the Power supply temperature signal input to (MCU) control circuit mode In; (the MCU) control circuit module according to a signal of each block obtained through the control duty cycle and frequency of the square wave output to control: the motor drive circuit module controls the rotational speed and the output power of the motor, control whether a charging circuit module to charge the battery.

2. The LED/LCD speed display electric clipper according to claim 1, wherein: (MCU) control circuit module is mainly composed of (MCU) and its peripheral circuits; the (MCU) is peripheral circuit and Each module is electrically connected,

(MCU) Obtain the motor's electromotive force signal from the motor detection circuit module, and (MCU) control the motor's electromotive force signal to control the duty cycle and frequency of the output square wave to control the motor's speed and output power; (MCU) The signals of each module are processed and calculated and input into the display circuit module for displaying various working states of the entire electric clipper circuit, in particular, displaying the motor speed and output power.

3. The LED/LCD speed display clipper according to claim 1, wherein: (MCU) of the (MCU) control circuit module is a single-chip microcomputer having a built-in processing program written by the code to perform a corresponding operation. Chip or microprocessor.

4. The LED/LCD speed display electric clipper according to claim 1, wherein: the display circuit module is composed of a light emitting diode or a liquid crystal display module, and the display circuit module and the (MCU) control circuit module are electrically Connected, wherein (MCU) performs corresponding arithmetic processing according to the obtained signals of each module through a processing program to display the number of (LED) lighting or the number of dots displayed on the (LCD) to display the motor speed or power and Battery level and charging.

5. The LED/LCD speed display electric clipper according to claim 1, wherein: the motor detecting circuit module is mainly a resistor (R31) connected to the M-terminal of the motor and connected to the MCU control circuit module, (R32),

(R33), capacitor (C10), where (C10), (R32) are grounded at the other end, and connected to the other end of the motor (M) and connected to the MCU control circuit module (R7), (R8), capacitor (C2) , (C2), (R7) The other end is grounded, and the (MCU) control circuit module can measure the armature current by the motor detection circuit module.

6. The LED/LCD speed display electric clipper according to claim 1, wherein: said power supply circuit module comprises an AC voltage converting and rectifying portion, a charging power detecting portion, a charging executing portion, and a power switch portion. Wherein, the AC voltage-converting rectifier converts 220V AC into DC power for charging, and the charging power detecting portion and the (MCU) control circuit module test whether there is a charging power supply and a charging voltage, and then input the obtained signal into the MCU. After the (MCU) operation, decide whether to let the charging execution part work.

7. The LED/LCD speed display electric clipper according to claim 1, wherein: the charging power source detecting portion of the power circuit module is mainly composed of (MCU) in a charging battery connection (MCU) control circuit module. The circuit consists of a resistor (R14), (R13), (R27), and a capacitor (C4) connected to one end of the battery and connected to the (MCU) control circuit module, wherein (C4), (R27) are grounded at the other end, and the battery The resistors (R1), (R2), (R20), and (C9) connected to one end and connected to the MCU control circuit module are composed of (C9) and (R2).

8. The LED/LCD speed display electric clipper according to claim 1, wherein: the charging execution portion of the power circuit module mainly includes a first transistor (Q1) and a second transistor (Q3), wherein the first The transistor (Q1) and the second transistor (Q3) form an oscillating circuit electrically connected to the (MCU) control circuit module; the oscillating circuit pulsates the input direct current, and the direct current passes through the (MCU) control circuit module (MCU) After that, the square wave will be formed. The square wave can change its average value according to the (MCU) adjustment to realize the change of the charging voltage and realize the basic constant current charging.

9. The LED speed display electric clipper according to claim 1, wherein: in an electric clipping circuit, after the motor (M) is connected across the capacitor (C1) and the diode (D6), the positive pole passes through the resistor. (R12), (Rll), (R17), capacitor (C7) connected to (Ul) pin (14), the other is connected to the collector of the transistor (Q5), and the negative terminal is connected to the resistor (R19), (R18), and capacitor (C12). Connect (U1) pin (13), (Q5) base via resistor (R23) to transistor (Q2) collector, (Q2) base via resistor (R3) to (U1) pin (9), (Q5) emission The poles are connected to the battery (BT1, 2) via resistors (R32), (R14), (R13), (R20), capacitor (C3) (Ul) (1), and connected to the transistor (R3) via resistor (R21). ) Collector, (Q3) The emitter is grounded via resistor (R27) and LED (D9), connected to the (U1) pin (2) via diode (D10) and resistor (R7), and grounded via resistor (R24). (Q3 The base is connected to the triode (Q1) collector via a resistor (R9), the (Q1) base is connected to the (U1) pin (11) via the resistor (R10), and the (U1) pin (3) is passed through the capacitor (C5). Module (U2) (U1) (11), (U1) 12) Grounded by switch (S3), connected to power supply via switch (S2) and resistor (R6), (U1) pin (10) connected to power supply via capacitor (C6), (C4), (U1) pin (6, 7) 8) Connect the light-emitting diodes (Dl-D5) via resistors (R16), (R7), and (R22).