Speaker module for mobile device and mobile device having duct radiation structure

A speaker module fastened to a mobile device, the speaker module comprising:

• a speaker for outputting a sound signal;
• a body in which the speaker is mounted;
• a duct connected to the body and comprising a first opening surface, a second opening surface, and a third opening surface, which are a radiation path of a sound signal output from the speaker;
• and
• a protection member attached to the second opening surface for preventing a foreign substance from entering the speaker module,
• wherein the first opening surface is formed at one side end of the duct, the second opening surface is formed within the duct, the third opening surface is formed to expose the second opening surface, and an area of the second opening surface has an area larger than that of a cross-sectional opening surface formed vertically with respect to a length direction of the duct.

A speaker module fastened to a mobile device, the speaker module comprising:

• a speaker for outputting a sound signal;
• a body in which the speaker is mounted;
• a duct connected to the body and having a first opening surface and a second opening surface for radiating a sound signal output from the speaker;
• and
• a protection member attached to enclose the first opening surface and the second opening surface for preventing a foreign substance from entering the speaker module,
• wherein the first opening surface is formed vertically or inclined with respect to a length direction of the duct, and the second opening surface is formed parallel or inclined with respect to a length direction of the duct.