linear motor

Abstract

The present invention provides a linear motor, wherein, a coil is fastened on a mass block that is suspended inside a housing, and a magnet is fastened on the housing and thus does not move during use. In the linear motor of the present invention, the design route that utilizes coil motion to drive mass block motion is different from the traditional route that utilizes magnet motion to drive mass block motion, thereby the traditional “moving-magnet type” is changed into “moving-coil type” of the present invention. When the linear motor provided by the present invention is used in a highly magnetic environment, even if magnetic shield plates for shielding external magnetic induction lines are glued on both outer sides of the housing, because the magnet is fixed stationary itself, no vertical deviation of the magnet due to influence of the shield plates like in the prior art occurs. Meanwhile, even if the magnetic shield plates exert vertical forces on the coil, because such forces exerted by the shield plates on the coil are very small, they are hardly able to drive the coil to move in the vertical direction, and thus no vertical deviation of the coil is caused, so that vibration noise is avoided.

Dependencies are inferred from the claim text.