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Razor Solution
1.The common classification of electric shavers
1. Distinguish the razor according to the head
(1) Rotary: Rotary shavers are not easy to damage the skin and cause bleeding. Friends with sensitive skin can focus on it. In addition, it operates with low noise. However, most of the rotary shavers on the market have a power of 1.2 watts, which is a little weak for men with thick and dense beards.
(2) Reciprocating: The principle of this kind of razor is relatively simple. It looks like a barber's knife when shaving, so it is very sharp and suitable for thicker and shorter beards. But because the blade often moves back and forth, it tends to wear out quickly. The advantage is that the shaving is higher and the shaving area is larger. The motor rotates at a high speed, which can provide powerful power. The fast-rotating motor drives the swinging blade to shave the beard easily and quickly, and the swinging head will never cause the beard to be dragged by the rotary shaver The phenomenon.
2. Distinguish razors by shape
(1) Straight barrel shaver: The appearance is cylindrical, with dynamic and static blades on the top, a permanent magnet DC motor in the middle, and a battery box at the bottom. A straight-barrel razor has three blades in a razor frame with a grille hole knife on the outside of the frame.
(2) Elbow type razor: the structure is basically the same as the straight type, the only difference is that the rotating cutter head and the motor form a certain angle with the lower battery box, which can be adjusted into 90° angle type and movable non-fixed angle type. This kind of shaver has a more beautiful appearance, a better hand feeling when shaving, and is convenient to use. Its shape usually has two types: circular and approximately rectangular.
(3) Horizontal razor: The horizontal razor combines rotary and reciprocating, and the cutter head is installed on the side of the cutter body. It has a two-part razor, the rotary type for shaving short beards and the reciprocating type for rolling long beards. In addition, friends who like to keep sideburns and hair horns can consider this model. It imitates the working principle of artificial faders, and it performs very well in these two aspects.
(4) Double-headed razor: more common. This kind of razor cuts a larger area than the above three types, and is suitable for those with more beards.
2.The radiation of electric shavers is relatively large
As a common small household appliance, electric shavers are widely used in people's daily life, but they do not know that the electromagnetic radiation generated by ordinary household electric shavers is far greater than that generated by televisions and computer monitors. . The Shanghai Environmental Radiation Research and Monitoring Center showed in a monitoring data that when the shaver switch is turned on, the radiation value instantly far exceeds that of TVs, mobile phones and other electrical appliances, and ordinary electric shavers must be used close to the face, so it is harmful to the human body. The dangers are self-evident. Today's electric shavers are mostly driven by low-cost brushed motors. Because the brushes are used for commutation, electric sparks and broadband radiation will be generated when the motor is working. This is a hidden danger around us.
There is a low-radiation electric shaver with electromagnetic radiation monitoring function. It mainly replaces a new type of brushless motor for the shaver. At the same time, it installs an advanced intelligent module for the shaver to monitor the electromagnetic radiation at any time and adjust the power of the motor. Control the size of radiation to minimize the health hazards caused by electromagnetic radiation.
Traditional electric shavers are mostly driven by low-cost brushed motors. When the motor is working, sparks are generated at the contact between the rotor and the carbon brush, which generates a large amount of broadband electronic radiation.
3. Design scheme of low radiation shaver
1. Overall structure
The shaver is composed of a shell, a blade, a low-voltage servo motor, a motor cable, a control panel, a battery, a cable, a charging interface, a switch cable, and a power switch. The control board is composed of an electromagnetic radiation measurement module, a blade speed regulation module and a power switch.
A low-voltage servo motor is installed near the blade. The low-voltage servo motor is connected to the control board through the motor cable. The control board can be connected to the external power supply through the battery cable. The electromagnetic radiation measurement module, the blade speed control module and the power switch are installed on the control board; The switch is connected in series between the storage battery and the electromagnetic radiation measurement module.
2. Methods to reduce radiation
The low-voltage servo motor used in this shaver does not contain carbon brushes and is a servo motor that can work at 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 current electric blade The amount of electromagnetic radiation of the shaver, if the amount of electromagnetic radiation at this time reaches the harmful value to the human body, the indicator light on the electromagnetic radiation measurement module will flash and the blade speed control module will automatically adjust the low-voltage servo motor through its internal electronic current commutator power, thereby rapidly reducing electromagnetic radiation.
3. Principle of electromagnetic radiation monitoring module
Electromagnetic radiation, also known as electronic smog, is composed of electric energy and magnetic energy transferred together in space, and the energy is generated by the movement of charges. The essence of electromagnetic radiation is still a kind of electromagnetic wave. The built-in antenna in the electromagnetic radiation monitoring module can Receive the tiny amount of electromagnetic waves generated when the internal device of the shaver is working, and convert them into electric current. The strength of the current is proportional to the strength of the electromagnetic waves. When the current is too large, the indicator light in the electromagnetic radiation monitoring module will start to flicker to remind the user that the electromagnetic radiation is relatively large at this time.
4. The principle of the razor blade speed adjustment module
The blade speed adjustment module contains a relay inside. When the electromagnetic radiation is too large, the electromagnetic radiation monitoring module will generate a relatively large current. When the current reaches the set value, the relay in the blade speed adjustment module can change the input circuit. The size of the resistor can automatically adjust the size of the current to reduce the power of the shaver and reduce electromagnetic radiation.
The above are the details of the electric shaver solution introduced by Shenzhen Zuchuang Microelectronics Co., Ltd. for you. If you have electronic function development needs for razors, you can trust us. We have rich experience in customized development of electronic products. We can evaluate the development cycle and IC price as soon as possible, and can also calculate PCBA quotations. We are a number of chip agents at home and abroad, including MCU, voice IC, Bluetooth IC and modules, wifi modules. Our development capabilities cover PCB design, single-chip microcomputer development, software custom development, APP custom development, WeChat official account development and other hardware and software design. It can also undertake the research and development of smart electronic products, the design of household appliances, the development of beauty equipment, the development of Internet of Things applications, the design of smart home solutions, the development of TWS solutions, the development of Bluetooth audio, the development of children's toys, and the development of electronic education products.
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