| 摘要 |
A door opening mechanism - for a domestic appliance such as microwave oven including a housing, a front door 102, and a resilient member for biasing the door open - is adapted to be located within the housing and comprises a retention mechanism engageable with the door and movable between a door engaged and a second door not engaged configuration. A cam 302 driven by a rotary motor in response to control signals has a plurality of cam surfaces 306, each being adapted through camming action to move the retention mechanism out of the door engaged configuration and release the door. As shown the cam 302 comprises a plurality of equally angularly spaced projections 303, the outer surfaces of the cam between successive projections comprising a cam surface Each cam surface has two slopes and both can cooperate with the retention mechanism to allow for a directional or multi-directional camming action. In use, the cam moves a rotatable member 308 about axis 312 into a position to lift a door bolt 316 against bias to a disengaged position allowing the door to be biased to a partially open position . The rotatable member engages the bolt 306 via a guide surface 314 which has a transition point 332 beyond which the bolt becomes disengaged. Also disclosed is a domestic appliance which includes the above mechanism, a motor and a controller. |
