| 摘要 |
According to an embodiment of the present invention, a dish washer comprises: a tub; a spray arm to spray washing water to an object to be washed; a sump which is mounted on a lower surface of the tub to store the washing water and supplies the washing water to the spray arm; an arm holder fixed on the spray arm to support the spray arm and rotatably mounted on the sump; a fixed gear unit which is fixed in the tub and has gear teeth formed on an outer circumferential surface thereof; a rotary gear unit rotatably mounted on the spray arm and meshed with the gear teeth of the fixed gear unit; and a link member connected to the rotary gear unit and the spray arm. The spray arm comprises: a main arm comprising an arm holder mounting unit connected to the arm holder and a pair of arms extended around the arm holder mounting unit; and a pair of auxiliary arms rotatably disposed on the main arm and extended around the arm holder mounting unit. The rotary gear unit is meshed with the gear teeth of the fixed gear unit and rotates by rotation of the main arm. The link member is moved by rotation of the rotary gear unit and pushes the auxiliary arms to rotate the auxiliary arms. |
