A door lock comprises an electromagnet (410), a latch shaft (320), a crank device (430) and the like. The crank device (430) is connected with the latch shaft (320) and driven by the electromagnet (410) to transform the linear motion of the electromagnet (410) into the rotary motion of the latch shaft (320). When the electromagnet (410) pushes or pulls the crank device (430), a latch head (202) rotates around an axis so that it can move to a locked position or an unlocked position. The door lock (200) of the present invention can transform the linear motion of the electromagnet (410) into the rotary motion of the latch head (202), so that the latch head (202) can be conveniently installed on the lateral surface rather than at an end of the door lock (200). The door lock (200) can be advantageously installed in the middle gap of a front panel (102) along an edge of a control panel of the washing machine (100) to lock the upper cover (101) from the middle part.