| 摘要 |
A dishwasher according to an embodiment of the present invention comprises: a tub; an injection arm which injects washing water to a target; a sump which is installed on the bottom surface of the tub to receive the washing water therein and supplies the washing water to the injection arm; an arm holder which is fixed to the injection arm to support the injection arm and is installed at the sump to be rotated; a fixed gear part which is fixed to the inner side of the tub and has gear teeth on the outer circumference; a rotary gear part which is installed at the injection arm to be rotated and is engaged with the gear teeth of the fixed gear part; and a link member which is connected to the rotary gear part and the injection arm, wherein the injection arm comprises: a main arm which has an arm holder coupling part connected to the arm holder and a pair of arms extended from the arm holder coupling part; and a pair of auxiliary arms formed at the main arm to be rotated and extended from the arm holder coupling part, wherein the rotary gear part is engaged with the gear teeth of the fixed gear part to be rotated by the rotation of the main arm, and wherein the link member is moved by the rotation of the rotary gear part to push and rotate auxiliary arms, respectively. Therefore, the present invention improves washing efficiency by varying the injection angle of washing water using the main arm and the auxiliary arms. |
