Patent ID: 9581785
Date: 2017-02-28
CPC Classifications: G02B

Claim:
1. A springless voice coil actuator comprising: a base; a coil disposed on the base; a guiding rod disposed on he base; a slidable base configured for sliding along the guiding rod to a predetermined direction; a main magnetic component connected to the slidable base; and a balance magnetic component coupled with the main magnetic component for generating a magnetic induction; a sub-balance component coupled with the main magnetic component for generating a magnetic induction; wherein when a current is exerted to the coil, the main magnetic component is coupled with the coil for generating a pushing force that pushes the slidable base; the main magnetic component is coupled with the guiding rod for generating a first pre-compression magnetic force; the balance component magnetic component is coupled with the main magnetic component for generating a second pre-compression magnetic force; the sub-balance component is coupled with the main magnetic component for generating a third pre-compression magnetic force; the first pre-compression magnetic force is combined with the second pre-compression magnetic force and the third pre-compression magnetic force for generating a linearly outputted total pre-compression magnetic force; and the total pre-compression magnetic force is axially balanced with the pushing force and linearly positioning the slidable base.