KR101157616B1 - Door interlock device for a microwave oven - Google Patents

Abstract

A door interlock device of a microwave oven for moving a door up and down to operate a first interlock switch, a second interlock switch, and a monitor switch disposed on a front surface of a cavity is disclosed. The present invention includes a cavity, a lifting guide rail, a door and a sensing member. The cavity is provided with a cooking chamber therein, and at least one lifting guide rail is installed on one surface of the cavity as a fastening means. The door is disposed at the front of the cavity to open and close the cooking chamber by lifting up and down. At this time, the guide groove is formed in a position corresponding to the lifting guide rail. The sensing member is installed at the front of the cavity and contacts the door to detect the position of the door. The sensing member includes a first interlock switch, a second interlock switch, and a monitor switch, and contact points are coupled to the first interlock switch, the second interlock switch, and the monitor switch, respectively. The first interlock switch is installed at the front of the cavity to sense the position of the door, and the second interlock switch is installed at a position parallel to the first interlock switch to sense the position of the door. The monitor switch is installed at the front of the cavity at a predetermined distance from the first interlock switch so as to contact the door later than the first interlock switch so as to detect the position of the door.

Microwave, Door, Interlock

Description

Door interlock device of microwave oven {DOOR INTERLOCK DEVICE FOR A MICROWAVE OVEN}

1 is a perspective view of a door interlock device of a microwave oven according to a preferred embodiment of the present invention;

FIG. 2 is an exploded perspective view of FIG. 1 viewed from the front; and

3 is a cross-sectional view of the door interlock device of the microwave oven according to the prior art.

<Description of Symbols for Main Parts of Drawings>

10: cavity 20: lifting guide rail

30: door 31: guide groove

40: sensing member 41: first interlock switch

42: second interlock switch 43: monitor switch

The present invention relates to a door interlock device of a microwave oven, and more particularly, to a door interlock device of a microwave oven for sliding the door up and down to operate the sensing member.

In general, unlike microwave cooking utensils by heat conduction or heat radiation, microwaves are cooked as a dielectric heating by translating the water molecules contained in the food. To cook food.

When cooking food in such a microwave oven, the high frequency irradiated into the cooking chamber adversely affects the human body, so it has to block outflow to the outside of the cooking chamber. Accordingly, a door interlock device is installed in the microwave oven to control the operation of the magnetron by supplying or cutting off power to the high voltage part according to whether the door for opening and closing the cooking chamber is opened.

4 shows a door interlock device of a microwave oven according to the prior art.

Referring to FIG. 4, the door interlock device of the microwave oven according to the related art includes a locking bar 110, a first interlock switch 214, a second interlock switch 218, a monitor switch 216, and a latch cavity 100. ).

The locking bar 110 is provided with upper and lower hooks 112 and 114 at both sides thereof so that the locking bar 110 can be elevated inside the door 100 installed at the front side of the electric compartment 200 and the first and second interlock switches 214, The 218 and the monitor switch 216 are disposed inside the electric room 200.

The latch cavity is installed inside the electric compartment 200 to open and close the upper and lower hooks 112 and 114 of the locking bar 110 according to the opening and closing of the door 100.

The locking bar 110 is elastically supported by the tension spring 111 installed in the door 100 and is always receiving a downward force, and guides the upper and lower hooks 112 and 114 to be inserted into the upper and lower portions of the latch cavity 210. The fixing slots 210a and 210b having the inclined jaws 211 and 212 are formed to correspond to the upper and lower hooks 112 and 114 of the locking bar 110, respectively, and the monitor switch 216 and the second interlock switch 218. The rotation lever 219 is rotatably installed around the hinge 219a.

In the door interlock device of the microwave oven according to the related art, which is configured as described above, the locking bar 110 is urged downward by the tension spring 111 when the door 100 is opened.

When the door 100 is closed in this state, the upper and lower hooks 112 and 114 of the locking bar 110 are inserted into the fixing slots 211 and 212, respectively, to ride the inclined jaws 210 and 210b, so that the locking bar 110 is tensioned. The elasticity of the spring 111 is raised to rise, and the moment of leaving the inclined jaw (210a, 210b), the locking bar 110 is lowered by the tension force of the tension spring 111, the upper and lower hooks (112, 114) inclined jaw The door 100 is locked by being caught by 211,212. Then, first, the lower hook 114 detects the closing of the door 100 by pressing the contact protrusion 216a of the monitor switch 216, and then the lower hook 114 detects the monitor switch 216 and the second. Push the rotation lever 219 rotatably installed between the interlock switch 218 to press the contact projection 218a of the second interlock switch 218 and at the same time the upper hook 112 of the first interlock switch 214 By pressing the contact protrusion 214a, power is supplied to the high voltage portion.

On the other hand, when the door 100 is opened, the locking bar 110 is raised by a conventional mechanism. Then, as the upper and lower hooks 112 and 114 are raised, the contact protrusions 214a and 218a of the first and second interlock switches 214 and 218 are restored to their original states. At this time, while the contact protrusion 218a of the second interlock switch 218 is restored, the rotation lever 219 is pushed to rotate the rotation lever 219 to its original state. Subsequently, as the contact projection 216a of the monitor switch 216 is restored to its original state, the open state of the door 100 is sensed so that the power supplied to the high pressure part is cut off, and the locking state of the door 100 is released.

However, in order to press the contact protrusion of the second interlock switch in the conventional door interlock device as described above, a separate rotation lever must be provided, which makes the structure of the latch cavity complicated, thereby increasing the number of parts and increasing the manufacturing cost. There was a problem in that the probability of failure when opening and closing the door due to a complicated structure.

The present invention has been made in order to solve the problems of the prior art as described above, the structure is simplified to operate the interlock device by sliding the door of the microwave oven up and down so that the second interlock switch can be operated without a separate rotation lever. It is to provide a door interlock device of a microwave oven that can reduce the manufacturing cost and reduce the probability of failure due to a complex structure.

In order to achieve the above object, the present invention includes a cavity, a lifting guide rail, a door, and a sensing member.

The cavity is formed inside the cooking chamber, and at least one lifting guide rail is installed on one surface of the cavity as a fastening means.

The door is disposed at the front of the cavity to open and close the cooking chamber by lifting up and down. At this time, the guide groove is formed in a position corresponding to the lifting guide rail.

The sensing member is installed at the front of the cavity and contacts the door to detect the position of the door.

The sensing member includes a first interlock switch, a second interlock switch, and a monitor switch, and contact points are coupled to the first interlock switch, the second interlock switch, and the monitor switch, respectively.

The first interlock switch is installed at the front of the cavity to detect the position of the door, and the second interlock switch is installed at a position parallel to the first interlock switch to contact the door at the same time as the first interlock switch to detect the position of the door. do.

 The monitor switch is installed at the front of the cavity at a predetermined distance from the first interlock switch so as to contact the door later than the first interlock switch so as to detect the position of the door.

As described above, in the microwave door interlock device according to the present invention, the first interlock switch, the second interlock switch, and the monitor switch are installed at the front of the cavity, and the first interlock switch, the second interlock switch, and the door are moved up and down. The contact with the monitor switch can simplify the construction of the interlock device, reducing the number of parts and reducing the cost of manufacturing the interlock device of the microwave oven door.

Hereinafter, a door interlock device for an electric range according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view of a door interlock device of a microwave oven according to a preferred embodiment of the present invention, Figure 2 is an exploded perspective view of the front view of FIG.

1 and 2, the door interlock device of the microwave oven according to the present invention includes a cavity 10, a lifting guide rail 20, a door 30, and a sensing member 40.

The cavity 10 has a cooking chamber formed therein, and the lifting guide rail 20 is provided with at least one fastening means on one surface of the cavity 10.

The door 30 is disposed on the front of the cavity 10 to open and close the cooking chamber while being moved up and down. At this time, the guide groove 31 is formed at the position corresponding to the lifting guide rail 20 in the door 30.

The sensing member 40 is installed in the front of the cavity 10 and is in contact with the door 30 to detect the position of the door 30.

The sensing member 40 includes a first interlock switch 41, a second interlock switch 42, and a monitor switch 43, and includes a first interlock switch 41, a second interlock switch 42, and a monitor switch ( 43 is coupled to each of the contact protrusions 41a, 42a, 43a which are in contact with the door 30.

The first interlock switch 41 is installed on the front of the cavity 10 to detect the position of the door 30, and the second interlock switch 42 contacts the door simultaneously with the first interlock switch 41. Installed in parallel with the interlock switch 41 is to detect the position of the door 30.

 The monitor switch 43 is installed at the front of the cavity 10 at a predetermined distance below the first interlock switch 41 so that the first interlock switch 41 contacts the door and then contacts the door 30. The position of 30 is detected.

The operation and effects of the door interlock device of the microwave oven according to the preferred embodiment of the present invention configured as described above will be briefly described.

Referring again to FIGS. 1 and 2, first, when the door interlock device of the microwave oven closes the cooking chamber with the door 30 open, the door 30 moves downward along the lifting guide rail 20. Come. At this time, the door 30 moves along the lifting guide rail 20 fitted into the guide groove 31 formed to correspond to the lifting guide rail 20.

When the door 30 descends along the sliding member 20, the contact protrusion 41a of the first interlock switch 41 and the second interlock switch 42 provided on the front surface of the cavity 10 ( The door 30 comes into contact with 42a at the same time. Next, the door 30 comes into contact with the contact protrusion 43a of the monitor switch 43. At this time, the contact protrusion 41a of the first interlock switch 41, the contact protrusion 42a of the second interlock switch 42, and the contact protrusion 43a of the monitor switch 43 are all in contact with the door 30. When the power is supplied to the high voltage part of the microwave oven.

Next, when it is detected that the door 30 is opened by the door interlock device of the microwave oven, the door 30 disposed on the front of the cavity 10 moves upward along the lifting guide rail 20. At this time, the lifting guide rail 20 is coupled to the guide groove 31 formed in the door 30.

When the door 30 is opened upward, the contact protrusion 43a of the monitor switch 43 does not come into contact with the door 30. At this time, when the contact projection 43a of the monitor switch 43 is returned to its original state without contact with the door 30, the monitor switch 43 recognizes that the door 30 is in a state in which the cooking chamber is opened, and thus the microwave oven. It will cut off the power supply to the high voltage part.

Next, the contact protrusion 41a of the first interlock switch 41 and the contact protrusion 42a of the second interlock switch 42 do not contact the door 30 and return to their original state, so that the door 30 is in the cooking chamber. Will open.

In the door interlock device of the microwave oven according to the present invention, the first interlock switch, the second interlock switch, and the monitor switch are arranged in front of the cavity such that the first interlock switch, the second interlock switch, and the monitor switch are in contact with the door in which the door is lifted up and down. Therefore, it is possible to reduce the failure of the interlock device by simplifying the operation structure of the interlock device. Next, since the components of the interlock device can be reduced, the manufacturing cost of the interlock device can be reduced.

Although the above has been described with reference to a preferred embodiment of the present invention, the present invention is not limited to these embodiments and can be variously modified and changed within the spirit and scope of the present invention shown in the claims below. Those skilled in the art will readily understand.

Claims (3)

A door interlock device for a microwave oven that controls the operation of the magnetron by supplying or cutting off power to the high voltage part depending on whether the door for opening or closing the cooking chamber of the microwave oven is opened. A cavity 10 in which a cooking chamber is formed; At least one lifting guide rail 20 installed as a fastening means on one surface of the cavity 10; A door 30 formed at a front surface of the cavity 10 to open and close the front of the cooking chamber while lifting up and down and having a guide groove 31 having one end opened at a position corresponding to the lifting guide rail 20; And And a sensing member 40 installed at the front of the cavity 10 to detect the position of the door 30 when the door 30 is in contact. The sensing member 40, A first interlock switch 41 installed at the front of the cavity 10 to detect a position of the door 30; The second interlock switch 42 is installed at a position parallel to the first interlock switch 41 to contact the door 30 at the same time as the first interlock switch 41, and detects the position of the door 30. ); And A monitor switch 43 disposed at a predetermined distance from the first interlock switch 41 so as to be in contact with the door 30 later than the first interlock switch 41, and detecting a position of the door 30; Door interlock device of the microwave oven comprising a. delete The method of claim 1, The first interlock switch 41, the second interlock switch 42, and the monitor switch 43 respectively protrude to one surface of the cavity 10 to be in contact with the door 30. Door interlock device of the microwave oven, characterized in that the combination 42a, 43a.

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