Development and design of razor scheme

1、 Common classification of electric shavers

1. Distinguish razors by head

(1) Rotary shaver: rotary shaver is not easy to hurt the skin and cause bleeding. Friends with sensitive skin can focus on it. In addition, it has low noise in operation. However, most of the rotary shavers on the market have a power of 1.2 watts, which is weak in the face of men with thick and dense beard.

(2) Reciprocating: the principle of this razor is relatively simple. Shaving is like a knife used by a barber. Therefore, it is very sharp and suitable for thicker and shorter beard. However, because the blade often moves back and forth, it often loses faster. The advantages are higher shaving clarity and larger shaving area. The motor speed is high and can provide strong power in the. The fast rotating motor drives the left-right swinging blade, which can easily and quickly shave the beard, and the left-right swinging blade will never pull the beard with a rotary razor.

2. Distinguish razors by shape

(1) Straight shaver: cylindrical in appearance, with dynamic and static blades on the top, permanent magnet DC motor in the middle and battery box in the lower part. The straight cylinder razor is equipped with three blades on the razor frame, and the outside of the razor frame is a mesh cover hole knife.

(2) Elbow shaver: the structure is basically the same as that of straight cylinder shaver, except that the rotating cutter head and motor form a certain angle with the lower battery box, which can be adjusted into 90 ° angle type and movable non fixed angle. This kind of razor has beautiful appearance, good hand feeling and convenient use. Its shape usually has two types: circular and approximate rectangular.

(3) Horizontal shaver: horizontal shaver combines rotary and reciprocating, and the cutter head is installed on the side of the cutter body. The utility model has a two-part razor, which can use a rotary type when shaving short beard and a reciprocating type when rolling long beard. In addition, friends who like to leave sideburns and hair corners can consider this one. It imitates the working principle of artificial pusher and performs very well in these two aspects.

(4) Double head razor: more common. The cutting area of this razor is larger than the above three, and it is suitable for those with more beard.

2、 The electric shaver radiates a lot

As a common small household appliance, electric razor is widely used in people's daily life. However, the electromagnetic radiation generated by ordinary household electric razor is far greater than that generated by TV and computer display. According to a monitoring data from Shanghai Environmental Radiation Research and monitoring center, when the razor switch is turned on, the radiation value instantly exceeds that of TV, mobile phone and other electrical appliances, and ordinary electric razors must be close to the face, so the harm to human body is self-evident. Nowadays, electric shavers are mostly driven by low-cost brush motor. Because it adopts brush commutation, the motor will produce electric spark and broadband radiation when working, which is the hidden danger around us.

There is a low radiation electric razor with electromagnetic radiation monitoring function, which mainly replaces a new brushless motor for the razor, and installs an advanced intelligent module for the razor to monitor the electromagnetic radiation at any time, adjust the motor power and control the radiation to minimize the health hazards caused by electromagnetic radiation.

Traditional electric shavers are mostly driven by low-cost brush motor. When the motor works, a large amount of broadband electronic radiation is generated here due to sparks at the contact between the rotor and the carbon brush.

3、 Design scheme of low radiation razor

1. Overall structure composition

The shaver is composed of shell, blade, low-voltage servo motor, motor cable, control board, battery, cable, charging interface, switch cable and power switch. The control board is composed of electromagnetic radiation measurement module, blade speed regulation module and power switch.

A low-voltage servo motor is installed near the blade, the low-voltage servo motor is connected with the control board through the motor cable, the control board can be connected with the external power supply through the battery cable, and the control board is equipped with an electromagnetic radiation measurement module, a blade speed regulation module and a power switch; The power switch is connected in series between the battery and the electromagnetic radiation measurement module.

2. Radiation reduction method

The low-voltage servo motor used by the shaver does not contain carbon brushes and can work under low voltage, which can eliminate most of the electromagnetic radiation. When the power switch on the control board is turned on, the blade speed control module reads the set value of the current speed (including high, medium and low) and accelerates to the specified speed through the low-voltage servo motor. At this time, the electromagnetic radiation measurement module obtains the electromagnetic radiation of the current electric shaver. If the electromagnetic radiation reaches the harm value to human body, At the same time, the blade speed control module will automatically adjust the power of the low-voltage servo motor through its internal electronic current commutator, so as to quickly reduce the electromagnetic radiation.

3. Principle of electromagnetic radiation monitoring module

Electromagnetic radiation, also known as electronic smoke, is composed of electric energy and magnetic energy jointly transferred by space, and the energy is generated by charge movement. The essence of electromagnetic radiation is still an electromagnetic wave. The built-in antenna in the electromagnetic radiation monitoring module can receive a small amount of electromagnetic wave generated during the operation of the internal device of the shaver and convert it into current, The strength of the current is directly proportional to the strength of the electromagnetic wave. When the current is too large, the indicator light in the electromagnetic radiation monitoring module will start to flash to remind the user that the electromagnetic radiation is large at this time.

4. Principle of shaving blade speed adjustment module

The blade speed regulation module contains a relay. When the electromagnetic radiation is too large, the electromagnetic radiation monitoring module will correspondingly generate a large current. When the current reaches the set value, the relay in the blade speed regulation module can change the resistance in the connecting circuit, so as to automatically adjust the current to reduce the power of the razor and reduce the electromagnetic radiation.