Linear vibration motor

A linear vibration motor, comprising:

• a shell having a housing space;
• a vibration unit, which is accommodated in the housing space;
• an elastic member for suspending the vibration unit in the housing space;
• a driving unit for driving the vibration unit to vibrate;
• wherein the vibration unit further comprises two housing portions recessing inwardly from the both sides of the vibration unit in a direction that is perpendicular to the vibration direction, the housing portion comprises a plurality of inner walls which form the housing portion, the linear vibration motor further comprises a blocking piece accommodated in the housing space and fixedly connected with one of the plurality of inner walls, and a foamed cotton at least partial accommodated in the housing portion and fixedly connected with the blocking piece, the blocking piece undertakes to support the foamed cotton to cooperate to limit displacement of the vibration unit in the vibration direction;
• the blocking piece comprises a first portion fixedly coupled to at least one of the plurality of inner walls and a second portion extending from an end of the first portion in a direction perpendicular to the vibration direction of the vibration unit, the first portion is perpendicular to the second portion, and the second portion undertakes and supports the foamed cotton, the first portion comprises a body portion connected to the second portion and a recess portion recessed along the direction from one end of the body portion toward the second portion, wherein the one end of the body portion is in a side away from the second portion;
• there are two recess portions, and the two recess portions are respectively located at two corners of the body portion away from one end of the second portion.