Linear vibration motor
AssigneeAAC Microtech (Changzhou) Co., Ltd.
InventorsZiang Li, Yan Shao, Zhiyong Cui
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Abstract
One of the objects of the present invention is to provide a linear vibration motor which enhances vibration performance. To achieve the above-mentioned object, the present invention provides a linear vibration motor having a housing body with an accommodation space; a vibration unit accommodated in the accommodation space; an elastic member suspending the vibration unit in the accommodation space; and a coil assembly fixed to the housing body for driving the vibration unit to vibrate. The vibration unit includes a magnet assembly having a plurality of first magnets arranged along a vibration direction of the vibration unit, and at least one second magnet sandwiched between two adjacent first magnets, for forming a magnetic circuit.
Claims6
A linear vibration motor, including:
- a housing body with an accommodation space;
- a vibration unit accommodated in the accommodation space, including a magnet assembly having a plurality of first magnets arranged along a vibration direction of the vibration unit, and at least one second magnet sandwiched between two adjacent first magnets, for forming a magnetic circuit;
- an elastic member suspending the vibration unit in the accommodation space;
- a coil assembly fixed to the housing body for driving the vibration unit to vibrate;
- wherein the first magnet is magnetized in a direction perpendicular to the vibration direction;
- the second magnet is magnetized along the vibration direction;
- the magnetizing directions of two adjacent first magnets are opposite to each other, wherein, a direction of a magnetic field generated by the second magnet is same to a direction of the magnetic field of force generated by the first magnet, the first magnet is a ring magnet, and the first magnet is magnetized in a radial direction, the second magnet is a ring magnet, and the second magnet is magnetized in an axial direction, wherein, the vibration unit further includes a weight in the second magnet, and a circular connector set on both sides of the magnet assembly along the vibration direction;
- the magnet assembly is connected to the elastic member through the circular connector.
Dependencies are inferred from the claim text.