Micro speaker device with water-proof structure

A micro speaker device having a water-proof structure, the device comprising:

• a magnetic assembly composed of a top plate, a magnet, and a yoke;
• a voice coil installed in a gap between the top plate and yoke;
• a vibration plate attached to a top face of the voice coil and having an outer peripheral portion fixed to a top face of the top plate;
• a cylindrical protector installed on the vibration plate and having a sound discharge hole formed therein, wherein the protector is constructed for fixing an outer peripheral portion of the vibration plate;
• and
• a cylindrical outer casing for housing the magnetic assembly, the vibration plate and the protector therein, wherein the outer casing has an upper plate having a sound discharge hole defined therein and has an open bottom,
• wherein the protector includes:
• an upper portion extending upward so as to be in close contact with a bottom face of the upper plate of the outer casing;
• and
• a lower portion, wherein the lower portion includes:
• a sealing member made of a rubber material, wherein the sealing member extends downward to closely contact a top face of the outer peripheral portion of the vibration plate;
• and
• a support member made of a plastic material, wherein the support member closely contacts a side face of the sealing member to support the sealing member,
• wherein the support member includes an inner support member mounted on an inner side face of the sealing member and an outer support member mounted on an outer side face of the sealing member,
• wherein a step is formed at a vertical middle level of the sealing member,
• wherein a receiving groove for receiving the step is formed in an inner lower end of the outer support member,
• wherein an inclined curved face is formed on an inner lower end of the inner support member so as to correspond to an inner face of the sealing member, and
• wherein the inclined curved face is formed to conform to a curved surface of an outer dome of the vibration plate, such that when the vibration plate vibrates up and down, collision therebetween does not occur.