Linear motor based on magnetic damping and solid buffer material damping

Abstract

The invention relates to a linear motor based on magnetic damping and solid buffer material damping, and belongs to the field of semiconductor manufacturing. The motor consists of an upper shell component, a rotor component and a lower shell component; the upper shell component comprises an upper shell, magnetic conduction plates I-III and two limiting blocks; the rotor component comprises a baffle, a balancing weight, two solid buffer material structures, two springs, two limiting adhesives and a magnet component; the lower shell component comprises a lower shell, a magnetic conduction plateIV, an FPC and a coil. The internal vibration of the motor is restrained in two aspects of magnetic damping and solid buffer material damping, the magnetic leakage phenomenon and the vibration of therotor component are effectively controlled, and the motor failure risk is reduced.

Description

technical field [0001] The invention belongs to the field of semiconductor manufacturing, and relates to a linear motor in which magnetic damping and solid buffer material damping are used together. Background technique [0002] The linear vibration element needs a certain damping to limit the movement amplitude of the mover when the mover vibrates. If there is no damping, there will be the following problems: (1) If the amplitude is too large, the spring compression will be large, and the spring stress will increase, which will easily lead to Risk of spring deformation or spring breakage, leading to product failure; (2) Excessive vibration amplitude, resulting in impact between the mover assembly and the upper casing assembly, resulting in noise and affecting the experience; (3) Slow stop speed, when the motor stops being energized, Driven by inertia, the movable subassembly cannot stop quickly, which affects the tactile experience; [0003] At present, the damping method ...

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Problems solved by technology

[0002] The linear vibration element needs a certain damping to limit the movement amplitude of the mover when the mover vibrates. If there is no damping, there will be the following problems: (1) If the amplitude is too large, the spring compression will be large, and the spring stress will increase, which will easily lead to Risk of spring deformation or spring breakage, leading to product failure; (2) Excessive vibration amplitude, resulting in impact between the mover assembly and the upper casing assembly, resulting in noise and affecting the experience; (3) Slow stop speed, when the motor stops being energized, Driven by inertia, the movable subassembly cannot stop quickly, which affects the tactile experience;

[0003] At present, the damping method adopted by the linear vibration motor of conventional products is to add magnetic fluid in the gap between the mover assembly and the upper casing assembly. The magnetic fluid has certain magnetism and viscosity, and can play a certain damping effect when the mover moves, but The magnetic fluid has the following fatal problems: (1) The temperature sensitivity of the magnetic fluid is extremely strong, and its damping effect at room temperature is very different from that at high and low temperature environments

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.

(2) It is difficult to add magnetic fluid, and the consistency of the added amount is difficult to grasp. Repeated addition or absorption is required, and the product consistency is poor; (3) The magnetic fluid is liquid, and the product will be lost after various destructive tests such as dropping Or reduce, reduce the damping effect and affect product quality; (4) The price of magnetic fluid is expensive, resulting in an increase in product cost

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