Patent ID: 8638973

Claim:
A speaker apparatus integrated with an operation panel of a machine tool, the speaker apparatus comprising: a speaker; a housing including a front surface where the operation panel is arranged and a plurality of openings are formed at a position corresponding to the speaker, two side surfaces adjacent to both sides of the front surface, and a bottom surface adjacent to the front surface and the two side surfaces; and a slit structure that is arranged between the speaker and the plurality of openings and is fixed to the housing, wherein the slit structure including a plurality of plate-shaped parts each of which extends in a direction along the bottom surface while being inclined from a side of the speaker toward a side of the bottom surface of the housing, so that a plurality of slits are formed, a plurality of fold-back parts each of which is folded back from an end of the plate-shaped part on the side of the speaker toward a side of the front surface of the housing, so that the plurality of slits are formed, and a drain part that is arranged on a side of one of the two side surfaces of the housing, and wherein each of a plurality of grooves formed by the plurality of plate-shaped parts and the plurality of fold-back parts communicates with the drain part and is inclined so that, in a posture of the slit structure when the operation panel is operated, liquid led from the plate-shaped parts flows to the drain part.