Linear vibration motor

A linear vibration motor comprising:

• a base with a containing space;
• a vibration unit, disposed in the containing space and vibrating along a vibration direction, including a weight, a containing groove penetrating through the weight along the vibration direction, two magnets spaced oppositely in the containing groove and fixed to the weight respectively;
• an elastic piece, for suspending the vibration unit in the containing space, located on and fixed to one side of the vibration unit along the vibration direction of the vibration unit;
• a coil assembly fixed to the base for driving the vibration unit to vibrate;
• wherein
• an orthographic projection of the coil assembly along the vibration direction is located between the two magnets and is spaced from the two magnets;
• the coil assembly comprises an iron core fixed to the base and a coil wound around the iron core;
• and
• said two magnets are magnetized along the vibration direction, and the magnetic poles of the two magnets are contrary arranged;
• a magnetizing direction of the coil assembly is perpendicular to the vibration direction and is parallel to a connecting line of the two magnets.