Heating cooking apparatus

A heating cooking apparatus comprising:

• a heating cooking chamber including a wall portion and configured to accommodate an object to be heated, the wall portion including a through hole;
• a housing configured to accommodate the heating cooking chamber;
• an opening/closing portion attached to the heating cooking chamber and configured to open or close the through hole;
• and
• a microwave supply unit configured to supply microwaves to an interior of the heating cooking chamber,
• wherein the opening/closing portion includes:
• a flowing portion including an opening and attached to the wall portion to form, between the flowing portion and the wall portion, an inner space where air flows, the opening facing the through hole,
• a cam fitting into the opening,
• a drive unit configured to rotate the cam,
• a lid portion disposed in the inner space and configured to open or close the through hole in response to a rotation of the cam, and
• a biasing portion configured to bias the lid portion in a separation direction indicating a direction away from the through hole,
• the cam includes a cam body and an extension portion extending from the cam body in a direction intersecting a rotation axis line of the cam,
• the cam presses the lid portion against a biasing force of the biasing portion to cause the lid portion to close the through hole,
• the flowing portion further includes a regulating portion,
• the regulating portion is positioned along the separation direction with respect to the extension portion, and abuts, in a state in which the lid portion closes the through hole, against the extension portion to regulate movements of the lid portion and the cam along the separation direction,
• the cam body further includes an abutting portion abutting against the lid portion in a state in which the lid portion closes the through hole,
• the abutting portion does not abut against the lid portion in a state in which the lid portion opens the through hole, and
• the regulating portion abuts against the extension portion before the abutting portion abuts against the lid portion based on the rotation of the cam.

A heating cooking apparatus comprising:

• a heating cooking chamber including a wall portion and configured to accommodate an object to be heated, the wall portion including a through hole;
• a housing configured to accommodate the heating cooking chamber;
• an opening/closing portion attached to the heating cooking chamber and configured to open or close the through hole;
• and
• a microwave supply unit configured to supply microwaves to an interior of the heating cooking chamber,
• wherein the opening/closing portion includes:
• a flowing portion including an opening and attached to the wall portion to form, between the flowing portion and the wall portion, an inner space where air flows, the opening facing the through hole,
• a cam fitting into the opening,
• a drive unit configured to rotate the cam,
• a lid portion disposed in the inner space and configured to open or close the through hole in response to a rotation of the cam, and
• a biasing portion configured to bias the lid portion in a separation direction indicating a direction away from the through hole,
• the cam presses the lid portion against a biasing force of the biasing portion to cause the lid portion to close the through hole, and
• the drive unit includes;
• a motor shaft,
• a motor body configured to rotate the motor shaft, and
• an output shaft that is eccentric relative to the motor shaft, wherein:
• the output shaft receives a driving force transmitted from the motor shaft, and
• the output shaft rotates the cam based on the driving force transmitted from the motor shaft.