Shutter covered on sound hole of loudspeaker module and assembling method thereof, loudspeaker module

A loudspeaker module, comprising a case and a loudspeaker unit accommodated and fixed in the case, wherein a sound hole is disposed for emission of sound on the case and near to the loudspeaker unit, wherein the loudspeaker module further comprises a blocking piece covering a sound hole of a loudspeaker module, wherein:

• the blocking piece is disposed at a position where the sound hole is located on a case of the loudspeaker module and is covered on the sound hole,
• the blocking piece is a nonmetallic flexible net, and is integrally formed with the case of the loudspeaker module by injection molding, on a wall of the case that is integrally formed with other walls of the case by the injection molding,
• the thickness of the blocking piece is in the range of 0.05 mm to 0.3 mm, and
• the diameter of the meshes of the blocking piece is in the range of 0.03 mm to 0.1 mm,
• wherein the blocking piece is a part of a first injection molding part, and the first injection molding part forms a portion of an internal surface of the wall of the case that is integrally formed with other walls of the case by the injection molding,
• the first injection molding part comprises a first injection molding body integrated with the blocking piece, and
• a periphery of the blocking piece is fixed by the first injection molding body.