Maglev mobile phone vibration motor

Abstract

The invention relates to a maglev mobile phone vibration motor, and belongs to the field of electronic devices. The maglev mobile phone vibration motor comprises an upper casing assembly, a mover assembly and a lower casing assembly; the upper casing assembly comprises an upper casing, first and second stoppers, first, second and third magnetic conductive plates and a closed loop; the mover assembly comprises a counterweight, a baffle plate, first and second springs, first and second limiting glue and a magnet assembly; and a fourth magnetic conductive plate is welded on the lower casing via laser, an FPC is pasted on the fourth magnetic conductive plate via back glue of the FPC itself, a coil is pasted on the FPC via glue, a coil stub is welded to a PAD on the FPC by electronic welding, and two other PADs on the FPC are used to supply power to the coil. When the mover assembly moves in the magnetic conductive plates, a magnetic loop formed by the magnetic conductive plates and a magnet can effectively inhibition the vibration amplitude of the mover assembly, the motor generates a good vibration experience, and the mover assembly can be inhibited effectively.

Description

Technical field [0001] The invention belongs to the field of electronic devices and relates to a vibration motor of a magnetic suspension mobile phone. Background technique [0002] The linear vibrating element needs a certain amount of damping when the mover vibrates to limit the amplitude of the mover's motion. If there is no damping, there will be the following problems: [0003] 1. Excessive amplitude will result in large spring compression and increase in spring stress, which will easily lead to the risk of spring deformation or spring breakage, resulting in motor failure; [0004] 2. The amplitude is too large, causing the mover component to collide with the upper casing component, causing noise and affecting the experience; [0005] 3. The stopping speed is slow. When the motor stops energizing, the mover assembly cannot stop quickly under the inertia, which affects the tactile experience; [0006] In the past, the linear vibration motor of the conventional motor uses a damping ...

AI Technical Summary

Problems solved by technology

[0003] 1. If the amplitude is too large, the compression of the spring will be large, and the stress of the spring will increase, which will easily lead to the risk of spring deformation or spring breakage, resulting in motor failure;

[0004] 2. The vibration amplitude is too large, causing the internal collision between the mover component and the upper casing component, resulting in noise and affecting the experience effect;

[0005] 3. The stop speed is slow. When the motor stops being energized, the movable subassembly cannot stop quickly under the drive of inertia, which affects the tactile experience;

At high temperature, the viscosity of the magnetic fluid drops sharply with the temperature. For every 10-15 degrees of temperature increase, the viscosity of the magnetic fluid will drop by one time, resulting in the failure of the damping effect, resulting in deformation, breakage or noise of the spring, which greatly affects the user experience; At low temperature, the viscosity of the magnetic fluid rises sharply with the temperature. Every time the temperature drops by 10-15 degrees, the viscosity of the magnetic fluid will double, resulting in a sharp increase in damping, causing the motor to be unable to vibrate due to excessive damping, and losing the effect of vibration experience.

[0008] 2. It is difficult to add magnetic fluid, the consistency of the amount added is not easy to grasp, it needs to be added or sucked repeatedly, and the consistency of the motor is poor;

[0009] 3. The magnetic fluid is liquid, and the motor will be lost or reduced after various destructive tests such as dropping, which will reduce the damping effect and affect the quality of the motor;

[0010] 4. The price of magnetic fluid is expensive, which leads to an increase in the cost of the motor;

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