Heating cooker with hinged door

A heating cooker, comprising:

• a body having a cooking chamber defined therein and a control panel including an input button;
• a door hingably mounted to the body to open and close the cooking chamber;
• a door holder holding the door to allow the door to close the cooking chamber and being connected to the control panel to allow the door to be automatically opened by releasing the door from the door holder in response to an input signal from the input button;
• and
• a hinge part connecting the door to the body to guide automatic opening of the door in response to a release signal, from the input button, of releasing the door from the door holder, the hinge part gradually reducing an opening speed of the door as an opening degree of the door is increased,
• wherein the hinge part comprises
• a bracket positioned at a lower end of the body and having a sloped surface formed thereon;
• a hinge case positioned in the door;
• at least one coupling shaft extending through the bracket and hinge case to hingably connect the bracket and the hinge case;
• a slide member slidably positioned in the hinge case and having at least one slit to accommodate the at least one coupling shaft;
• a spring fixed at one end to the hinge case and at the other end to the slide member;
• and
• at least one roller positioned in the slide member to be brought into rolling contact with the sloped surface to guide movement of the roller to allow automatic opening of the door via rotation.