KR100567036B1 - Device for Inter-lock of a door of a microwave oven - Google Patents

Abstract

A door interlock device for a microwave oven is disclosed for pressing a contact protrusion of a second micro switch provided in a latch body by a lower hook of a locking bar when a door is closed. The door interlock device of the microwave oven is provided with upper and lower hooks 22 and 24, and the locking bar 20 and the upper and lower hooks 22 and 24, which are installed on the inner side of the door 10, can be lifted and locked. The latch body 40 is installed in the electric compartment 30 so as to be provided. A portion of the lower end of the lower hook 24 is provided with a pressing portion 26 inclined at a predetermined angle in the end binary state. The upper part of the latch body 40 is provided with a first micro switch 44 on which the contact protrusion 44a is pressed by the upper hook 22 of the locking bar 20, and the lower hook of the locking bar 20 is provided below. (24) The monitor switch 46 and the second micro switch 48 are provided in close proximity to each other so that the contact projections 46a and 48a are pressed by the ends and the pressing portions 26. The door interlock device of the microwave oven configured as described above can simplify the structure of the latch body by pressing the contact protrusion of the second micro switch along the inclined surface of the pressing portion formed on the lower hook of the locking bar when the door is closed.

Microwave, Door, Interlock, Locking Bar, Latch Body

Description

Device for inter-lock of a door of a microwave oven

 1 is a cross-sectional view showing a door interlock device of a microwave oven according to a preferred embodiment of the present invention;

FIG. 2 is an enlarged perspective view illustrating main parts of a lower hook and a monitor switch and a second micro switch of the locking bar shown in FIG. 1;

Figure 3a, 3b is a view showing the operating state of the door interlock device of the microwave oven according to a preferred embodiment of the present invention, Figure 3a is a view showing the closed state of the door, Figure 3b is a view showing the open state of the door, and

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

 <Explanation of Signs of Major Parts of Drawings>

10 door 20 locking bar

22: upper hook 24: lower hook

26: press 30: battlefield

40: latch body 44: first micro switch

44a, 46a, 48a: contact projection 46: monitor switch

48: second micro 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, a locking mechanism of a second micro switch operated by a rotation of a rotation lever installed on a latch body without a rotation lever. By installing to operate by the lower hook, it relates to a door interlock device of the microwave oven that can simplify the structure of the latch body to reduce the manufacturing cost, and reduce the probability of failure generated when opening and closing the door.

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, high frequency irradiated into the cooking chamber adversely affects the human body, so it has to completely 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.

As shown in FIG. 4, the door interlock device of the microwave oven according to the related art is provided with upper and lower hooks 112 and 114 at both sides thereof, and ascends inside the door 100 installed at the front side of the electric compartment 200. Locking bar 110, which is installed as possible, and the first and second micro switches 214 and 218 for power interruption and the monitor switch 216, the upper and lower hooks of the locking bar 110 in accordance with the opening and closing of the door 100 The latch body 210 is installed in the interior of the battlefield 200 so that the 112 and 114 are locked and unlocked.

The locking bar 110 is elastically supported by the tension spring 111 installed in the door 100 and is always receiving a force downward.

In addition, the upper and lower hooks of the locking bar 110 are fixed slots 210a and 210b having inclined jaws 211 and 212 to guide the insertion of the upper and lower hooks 112 and 114 to the upper and lower hooks of the latch body 210. It is formed so as to correspond to the 112 and 114, respectively, and the rotation lever 219 is provided between the monitor switch 216 and the 2nd micro switch 218 so that rotation is possible about 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 micro switch 218 to press the contact projection 218a of the second micro switch 218 and at the same time the upper hook 112 of the first micro 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 micro switches 214 and 218 are restored to their original states. At this time, while the contact protrusion 218a of the second micro 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 the conventional door interlock device as described above, in order to press the contact projection of the second micro switch, a separate rotation lever must be provided, which complicates the structure of the latch body, 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 to solve the above problems of the prior art, the technical problem of the present invention is to enable the second micro switch installed in the latch body of the microwave oven to operate without a separate rotation lever By simplifying the structure of the latch body in accordance with the reduction to reduce the manufacturing cost, and to provide a means to reduce the probability of failure due to the complex structure.

The present invention for solving the above technical problem,

Locking bar which is provided on both sides with upper and lower hooks to be able to move up and down inside of the door, the first micro switch to which the contact protrusion is pressed at the end of the upper hook and the monitor switch at which the contact protrusion is pressed to the end of the lower hook. In each of the door interlock device of the microwave oven comprises a latch body is provided in the interior of the electrical compartment so that the upper and lower hooks are locked, unlocked in accordance with the opening and closing of the door, the end of the lower hook A pressing portion inclined at a constant angle in a binary state is formed, and the latch body has a second micro switch installed in close proximity to the monitor switch such that the contact protrusion is pressed on the inclined surface of the pressing portion when the door is closed. A door interlock device for a microwave oven is provided.

The door interlock device of the microwave oven according to the present invention having such a feature has an upper hook and a lower hook at both sides thereof, and at a predetermined angle in a stepped state at a part of the lower hook end of the locking bar which is installed to be liftable inside the door. The monitor switch and the second micro switch are formed by using the lower hook when the door is closed by installing the inclined pressing part and installing the monitor switch and the second micro switch close to the lower part of the latch body where the upper and lower hooks are locked or unlocked. You can press the contact projection of.

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

1 illustrates a door interlock device of a microwave oven according to a preferred embodiment of the present invention, and FIG. 2 illustrates a lower hook, a monitor switch, and a second micro switch of the locking bar shown in FIG. 1.

1 and 2, the door interlock device of the microwave oven according to the preferred embodiment of the present invention is provided with upper and lower hooks 22 and 24 at both sides thereof so that the door interlock can be elevated inside the door 10. The locking bar 20 and the first micro switch 44 on which the contact protrusion 44a is pressed by the upper hook 22 are provided on the upper side, and the contact protrusions 46a and 48a are pressed by the lower hook 24. The monitor switch 46 and the second micro switch 48 include a latch body 40 provided in the lower portion so as to be adjacent to each other and installed in the interior of the electric compartment 30.

This will be described in more detail as follows.

The locking bar 20 is provided with upper and lower hooks 22 and 24 on both sides thereof to be locked to the latch body 40 when the door 10 is opened or closed. The pressing portion 26 inclined to a constant angle in the binary state is formed. The locking bar 20 is elastically supported by the tension spring 21 provided in the door 10 to be able to move up and down when opening and closing the door 10, the door (10) to receive the force at all times downward by the tension spring (21). 10) is installed.

In addition, the latch body 40 is installed in the interior of the electric compartment 30 so that the upper and lower hooks 22 and 24 of the locking bar 20 are locked and unlocked. Fixing slots 40a and 40b through which the lower hooks 22 and 24 pass, respectively, are formed, and the fixing slots 40a and 40b are provided with inclined jaws 41 and 42 that are inclined to the rear upper side.

Inside the latch body 40, the first and second micro switches 44 and 48 and the monitor switch 46 for supplying or cutting off power to high voltage parts such as a high voltage transformer and a magnetron according to whether the door 10 is opened or closed. The first micro switch 44 is provided at the end of the upper hook 22 of the locking bar 20 in which the contact protrusion 44a is pressed, and the lower part of the locking bar 20 is installed at the upper end thereof. The monitor switch 46 and the second micro switch 48, each of which the contact protrusions 46a and 48a are pressed at the end of the hook 24 and the pressing part 26, are installed in close proximity to each other. At this time, the contact protrusions 44a of the first micro switch 44 face upward, and the contact protrusions 46a and 48a of the monitor switch 46 and the second micro switch 48 face forward.

3A and 3B illustrate an operating state of a door interlock device of a microwave oven according to a preferred embodiment of the present invention. FIG. 3A shows a closed state of a door, and FIG. 3B shows an open state of a door.

Referring to Figure 3a, 3b will be described the operation of the door interlock device of the microwave oven according to the preferred embodiment of the present invention configured as described above are as follows.

First, when the door is closed, as shown in Figure 3a, the upper and lower hooks 22, 24 of the locking bar 20 installed in the door 10 has a corresponding fixing slot 40a, 40b of the latch body 40. As it is inserted into the sliding contact with the inclined jaw (41,42). Then, the locking bar 20 rises while winning the elasticity of the tension spring 21, and the locking bar 20 descends by the tension force of the tension spring 21 at the moment of leaving the inclined jaws 41 and 42. The door 10 is locked by being caught by the jaws 41 and 42.

At this time, the end of the lower hook 24 first presses the contact projection 46a of the monitor switch 46 to detect the closing of the door 10, and then the pressing portion formed to be inclined at the end of the lower hook 24. While the 26 presses the contact protrusion 48a of the second micro switch 48, the upper hook 22 presses the contact protrusion 44a of the first micro switch 44, such as a high pressure transformer and a magnetron. Power is supplied to the high voltage part.

On the other hand, when the door is opened, as shown in FIG. 3B, as the locking bar 20 is raised, the contact protrusion 44a of the first micro switch 44 pressed by the end of the upper hook 24 is restored to its original state. At the same time, the contact projection 48a of the second micro switch 48 pressed by the pressing portion 26 of the lower hook 24 is formed along the inclined surface of the pressing portion 26. Like 44a), it is restored to its original state. Subsequently, the end of the lower hook 24 is separated from the monitor switch 46, and the contact protrusion 46a of the monitor switch 46 is restored to detect the open state of the door 10, thereby cutting off the power supplied to the high voltage part. Then, the locked state of the door 10 is released.

As described above, the door interlock device of the microwave oven according to the present invention forms a pressing part connected to the end of the lower hook of the locking bar installed in the door, and closes the monitor switch and the second micro switch provided in the latch body to each other. It is installed so that the contact protrusion of the second micro switch can be pressed by the lower hook without a separate rotation lever, thereby simplifying the structure of the latch body, reducing the manufacturing cost and reducing the number of parts, and thus the probability of failure occurring when opening or closing the door. The effect that can reduce the is provided.

The present invention has been described above by the embodiments, but the present invention is not limited to the above-described embodiments, and those skilled in the art without departing from the gist of the present invention claimed in the claims. Anyone can make a variety of variations.

Claims (1)

Upper and lower hooks 22 and 24 are provided at both sides of the locking bar 20, which is installed in the door 10 so as to be elevated, and the contact protrusion 44a is pressed at the end of the upper hook 22. 1 The micro switch 44 and the monitor switch 46 for pressing the contact projections 46a at the ends of the lower hook 24 are provided at the upper and lower portions, respectively, so that the upper and lower portions are opened according to the opening and closing of the door 10. In the door interlock device of the microwave oven including a latch body 40 is installed in the interior of the electrical equipment room 30 so that the hooks 22 and 24 are locked and unlocked. A portion of the lower end of the hook 24 is formed with a pressing portion 26 inclined at a predetermined angle in a stepped state, and the latch body 40 of the pressing portion 26 when the door 10 is closed. The door interlock device of the microwave oven, characterized in that the second micro switch (48) is installed in close proximity to the monitor switch (46) so that the contact projection (48a) is pressed down the inclined surface.

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