A micro drive motor

Abstract

The invention discloses a miniature drive motor which comprises an upper cover, an upper gasket, an upper spring leaf, a carrier, a coil component, a magnetic component, a lower spring component, a lower gasket and a base. The base comprises magnetic body of a basically flat plate shape. The base is provided with a central hole. The peripheral edges of the base is fixed on the side wall of the upper cover and the bottom surface. The side, close to the coil component, of the magnetic component and the base form a magnetic passage for allowing penetration of the coil component. The lower gasket comprises a pressing plate of a basically rectangular frame shape. The outer edge of the lower spring leaf is pressed to the base magnetic body. By the modified base position, the base is matched with the upper cover for use, and accordingly structure of traditional miniature drive motors is simplified greatly, and production efficiency and yield are improved effectively.

Description

Technical field [0001] The invention belongs to the technical field of micro motor structure design, and specifically relates to a micro drive motor. Background technique [0002] Micro camera devices have been widely used in mobile phones and notebook computers, and the micro drive motors (also called lens drive motors) have become smaller and smaller. [0003] The traditional micro drive motor generally includes an upper cover, an upper spacer, an upper spring sheet, a lens carrier, a magnet assembly, a coil assembly, a lower spacer, a lower spring sheet assembly and a base; the traditional upper cover is made of magnetically conductive materials, and the magnet The component is located under the top wall of the upper cover, and there is no magnetic material under the magnet component, so most of the magnetic field lines of each magnet in the magnet component enter the top wall of the upper cover after passing through the coil component, and return to the magnet from the side wal...

AI Technical Summary

Problems solved by technology

[0003] The traditional micro-drive motor generally includes an upper cover, an upper gasket, an upper spring piece, a lens carrier, a magnet assembly, a coil assembly, a lower gasket, a lower spring assembly and a base; the traditional upper cover is made of a magnetically conductive material, and the magnet The assembly is located under the top wall of the upper cover, and there is no magnetically conductive material under the magnet assembly, so most of the magnetic force lines of each magnet in the magnet assembly enter the top wall of the upper cover upward after passing through the coil assembly, and return to the magnet from the side wall of the upper cover , forming a closed magnetic circuit; thus, the magnetic force lines of each magnet near the top wall of the upper cover are relatively dense, while the magnetic force lines away from the top wall of the upper cover are relatively sparse, resulting in the coil assembly moving up and down with the carrier. The magnetic field at the place changes, affecting its linear movement effect

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