Interlocking device for microwave oven

Abstract

An interlocking device for microwave ovens comprises a bolt, a push rod, a door lock plate, first and second safety switches and a release lever. The release lever includes first, second and third arms. The first arm rotates under the pressure exerted by the bolt, the second arm rotates downwards under the influence of the rotation of the first arm and puts pressure on the actuator of the first safety switch and the third arm rotates forward when the first arm rotates and puts pressure on the actuator of the second safety switch, thus each safety switch contact on the door lock plate can release accurately.

Description

technical field [0001] The invention relates to a microwave oven, in particular to an interlocking device for a microwave oven. That is, the door lock assembly for opening and closing the furnace door. Background technique [0002] In general, a microwave oven is a machine that uses 2,450 MHz microwaves per second as a heating source to heat food using frictional heat generated by molecular vibrations of constituent substances. [0003] Such as figure 1 As shown, the microwave oven is composed of a furnace body including a casing 11 and an appearance frame 12; a furnace cavity 20 forming a heating chamber and an electric control room 30 in which various electrical components are arranged. [0004] A flippable furnace door 40 is provided on the appearance frame 12 to open and close the inside of the furnace cavity 20 . A door lock assembly is provided on the furnace door 40, and a door lock plate is provided on the appearance frame. The door lock plate is equipped with se...

AI Technical Summary

Problems solved by technology

[0023] However, although the structure of the door lock assembly and the door lock plate can provide a smooth feeling when opening and closing the furnace door, when the furnace door is drooping, the first arm 82a of the second lever 82 cannot completely contact with the door bolt 53. , so that the actuators 71a, 72a of the first safety switch 71 and the second safety switch 72 cannot be accurately applied

[0024] That is, the rotation distance of the second lever 82 is only designed to be the distance that the second arm 82b under the pressure of the door latch applies pressure to the actuator 71a of the first safety switch 71 when the furnace door does not sag (or the third arm 82b). When the arm 82c applies pressure to the actuator 72a of the second safety switch 72), if the furnace door sags, the height of the end of the door bolt 53 moves downwards by a distance equal to the degree of furnace door sag, thereby even if the door bolt 53 is given The first arm 82a presses, and the second arm 82b and the third arm 82c cannot completely press the actuator 71a of the first safety switch 71 and the actuator 72a of the second safety switch 72

[0025] As a result, the contacts of the safety switches 71, 72 are in a state between the unlocked state and the locked state, so there is a problem that the furnace door is misjudged as being completely closed when the furnace door is not completely closed. point

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