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Cell phones vibrating motors. Cell phones vibrating motors
Reason for movement
Cell phones vibrate motors, which are one of the things that has a brush, which is used to achieve the vibration of mobile phones
When a text message or a phone call is received, the motor is activated and the cardiac wheel is rotated at high speed, resulting in
Vibration, today's mobile phone is getting smaller and smaller to fit the lighter cell phone
Body needs. Cell phone vibrating motors
It's a small shell made of engineering plastic outside of the motor
Direct current motor, drive the eccentric wheel. In addition, there is a very simple integrated circuit
It is used to control the operation of electrical motors. When the cell phone is set to vibrate, hand
Switch the circuit. There's a eccentric wheel on the motor axis. When the motor turns, the eccentric wheel
The dots of the centre are not on the turn of the power, leaving the motor in constant disequilibrium
Vibration due to inertia。
The reason why the motor vibrates the cell phone
(1) caused by eccentric movements of metal rods。
Because the metal rods rotate at high speed inside the sealed metal box where they are, they cause the metal by friction
The inner air of the box also works hard. It causes the entire sealed metal box to vibrate, and..
Drive the whole phone to generate vibration. With the above calculations, the metal rods make high-speed rotations
This is due to the fact that the primary cause of vibration is mobile phones。
(2) resulted from unstable focus。
Because the metal rods attached to the convulsions of the motor are not geometrically symmetrically symmetrical
The turning axis, which shakes the motor, turns a corner in the direction of the mass. And so..
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The resulting metal rod does not actually move horizontally. It's in the middle of it
The position will shift with the position of the metal bar, so the metal bar's turning plane is also water
The plane shows a certain change of angles. It's always in space. Change
The movement of the chemical will cause the object to move. When the change is smaller and particularly frequent
That is, at the macro level, vibrating。
Cell phone vibrating motor's attention
1, motors working under their nominal rated voltage are highly integrated and recommend mobile circuits
The working voltage is designed as close as possible to the rated voltage design。
2. The mastery module for power supply to motors should take into account that their output resistance is as small as possible to prevent load failure
The voltage dropped significantly, affecting vibrations。
3 . Blocking time (less than 5 seconds) should not be too long when the cylinder is checked or tested to block the current
Due to the conversion of all input power into thermal energy (p=i2r) at the time of blocking, time passed
Long can lead to high coil temperature and deformation, affecting performance。
4. The motors with the stubbles are designed not to have too much gap with the cell phone shell
Otherwise, additional vibration (mechanical noise) is likely to occur, and the acceptance of rubber condom fixes can be effectively avoided
Mechanical noise, but be aware that the locator slots on the shell and rubber casings are subject to active collaboration, otherwise they will
Vibration output affecting motors. Vibration drops。
5. To avoid proximity to a strong magnetic zone when transiting or using, otherwise it is possible to distort motor magnetometers
And it affects performance。
Six, weld temperature and welding time
Excessive length and excessive temperature may damage the insulation of the insulation line。
7. Remove the motor unit from the packaging or avoid pulling the pull wire during welding, and
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It is not permitted to bend many times at a large angle, otherwise it is possible to damage the line。
Cell phone vibrating motor domestic production scale
With more people owning mobile phones, there's a huge number of domestic mobile phone motors
Increases, but mainly in a few provinces and cities, with guangdong being the most spread, followed by
Zhejiang, tianjin, shanghai, etc., are mainly dominated by japanese and korean companies, with total global production
80%, most of which are exported, and the domestic mobile phone has 300 per annum
The market demand for domestic mobile phones is about $10 billion. Based on the market environment in recent years
And in terms of development, global mobile phone market demand will continue to grow steadily, from 2005
From 2007 to 2007, the average annual increase in mobile phones reached 15 per cent。
