KR100531372B1 - Latch & latchboard in microwave - Google Patents

Abstract

The present invention can operate at least three or more switches individually with only two levers, and the lever and latch board of the microwave oven simplifies the configuration and at the same time the switch fastening method by restoring the operated lever without the spring. Provide structure.

To this end, the present invention includes a door having a latch and a push bar drawn out from the inside of the door panel to the main body; It provides a latch and latchboard structure of a microwave oven, characterized in that it comprises a latch board having two levers actuated by the latch and the push bar and a plurality of switches pressed by the two levers. .

Description

Latch & Latchboard Structures for Microwave Ovens

The present invention relates to a microwave oven, and more particularly, to a coupling structure between a latch of a door panel and a latch board operated by the latch when opening and closing a door of a microwave oven.

In general, a microwave oven (MWO) is a device for cooking food by the heat of intermolecular friction generated by disturbing the molecular arrangement of food by using a high frequency (about 2,450 MHz per second) as a heating source.

1 is a perspective view showing the appearance of a conventional general microwave oven.

Referring to FIG. 1, the microwave oven generally includes a main body 10 including a front case 11 and an outer case 12, an exterior frame 13, a cavity 20 forming a cooking chamber, and It is configured to include an electric equipment room 30 in which various electric equipment parts are installed.

In this case, the front case 11 forms the front surface of the main body 10, and is provided with a cavity door 14 for opening and closing the cavity 20.

In addition, the exterior frame 13 forms the bottom and the rear of the main body 10 and together with the outer case 12 and the front case 11 to protect the cavity 20 and the electric compartment 30 from an external environment. do.

The electrical component is a magnetron 31 that generates microwaves, a high voltage transformer 32 that supplies a high voltage to the magnetron 31, and various electrical components inside the body 10. It is comprised including the blowing fan 33.

The door 14 of the microwave oven is formed to be opened and closed by adopting a hinge structure, and when the door 14 is closed to the main body 10, a latch drawn from the door panel 141 is described as follows. The lever of the latch board formed in the main body 10 is moved to operate the switch.

Figure 2 is a side view schematically showing a latch board mounted to the conventional microwave oven, Figure 3 is a rear view with the lever omitted in Figure 2.

The latch board 101 is fixedly installed on the cavity frame front frame of the microwave oven, and is operated by approximately three levers L1, L2, and L3 and the levers L1, L2, and L3. Consists of five or five switches. As shown in the figure, the latch inlet 103 is formed in the side portion of the latch board 101. The latch inlet 103 is configured to be inclined upward when the latch 142 enters, and is configured to be fixed downward from the inclined surface after the latch 142 is raised along the inclined surface.

The latch board 101 is provided with a switch S actuated by three levers L1, L2, and L3, the switches S each having a primary safety switch S1 according to its role. , Secondary safety switch (S2) and monitor switch (S3) and the like.

In the drawing, the primary safety switch S1 formed in the upper portion of the latch board 101, the monitor switch S3 formed in the middle portion, and the secondary safety switch S2 formed in the lower portion are provided. Each switch (S) is configured to be mounted up to two in parallel depending on the formation position, as a means for fixing the switch (S) to the latch board 101, two fixing pins (P) and hooks (H) Is employed.

That is, two holes 102 are formed at the corners of the switch S in diagonal directions, and the fixing pins P are inserted into the holes 102 and then the switch is pressed by the hook H. (S) is combined so that it does not deviate.

4 is a diagram illustrating a state in which the latch 142 of the door is inserted into the latch board 101 to operate the actuator A of the switch S. Referring to FIG.

As shown in the figure, the latch 142 of the door ascends along the inclined surface of the latch inlet 103 and then is secured across the top of the inclined surface. Two latches 142 of the door are inserted into the latch inlet 103 at the upper side and the lower side at the same time, and the upper latch 142a operates the secondary safety switch S2 at the time of fixing. And the lower latch 142b is formed by pushing the lever L2 (hereinafter referred to as the second lever) for operating the monitor switch S3 to be partially rotated. And pushes the lever L3 (hereinafter referred to as the third lever) for operating the primary safety switch S1 to be partially rotated.

The first lever L1 rotated by the upper latch 142a presses the actuator A2 of the secondary safety switch S2 so that the switch S2 is operated. The second lever L2 and the third lever L3 rotated by the lower latch 142b respectively press the actuators A1 and A3 of the monitor switch S3 and the primary safety switch S1, respectively. Let it work

As such, when the door is opened again when the door is closed, the latches are lifted up by the operation of the door handle 143 to release the latch 142 from the latch inlet 103, and partially rotated by the latch 142. The actuators A of the switch S are released as the levers L are restored to their original state by the spring 107.

As described above, the conventional latch board has the following problems.

Three levers (L) must be configured to operate at least three or more individual switches, and each of the levers (L) must be provided with a spring for restoring the lever (L). There is a problem of increased cost and complexity of the process.

In addition, the means for fixing each switch to the latch board 101 also forms two holes for each switch, and two fixing pins and hooks must be installed on the latch board, which makes the configuration complicated and the switch fastening work complicated. There is a problem.

The present invention has been made to solve the above-mentioned problems of the prior art, it is possible to operate at least three or more switches individually with only two levers, and to simplify the configuration by restoring the operated lever without the spring. At the same time, the object of the switch is to provide a simplified latch and latch board coupling structure of the microwave oven.

In order to achieve the above object, the present invention includes a door having a latch and a push bar drawn from the inside of the door panel to the main body; It provides a latch and latchboard structure of a microwave oven, characterized in that it comprises a latch board having two levers actuated by the latch and the push bar and a plurality of switches pressed by the two levers. .

The structure of this invention is demonstrated in detail, referring an accompanying drawing. For reference, prior to describing the configuration of the present invention, in order to avoid duplication of description of the prior art reference to the same reference numerals will be referred to.

5 is a view showing a preferred embodiment of the latch and latch board coupling structure of the microwave oven according to the present invention.

As shown in the figure, the latch board 101 according to the present invention is provided with two levers L1 and L2 upward and downward. For convenience of explanation, the upper lever will be referred to as a first lever L1, and the lower lever will be referred to as a second lever L2.

The first lever (L1) and the second lever (L2) are both provided with a rotating shaft and has a structure that can be rotated, the first lever (L1) has two arms, the second lever (L2) It has three arms. The first lever L1 penetrates the side of the latch board 101 and is operated by the incoming push bar 144, and the second lever L2 also penetrates the side of the latch board 101 and enters the latch. 142 is operated.

The push bar 144 is drawn out from the door panel (not shown), and pushes the lower arm L12 of the first lever L1 through the bar hole 108 when the door is coupled to the microwave oven body and closed. Play a role. On the other hand, the latch 142 configured in the door panel includes a locking jaw 142b that is inclined to the head portion 142a, and the locking jaw 142b is detachable to the locking protrusion 101a of the latch board 101. Formed.

6 and 7 are views illustrating the operation between the latch and the latch board by the operation of the door handle when the door of the present invention is closed. As shown in the figure, the latch 142 is connected to the door handle 143 with the pivot shaft 5 interposed therebetween. The pivot shaft 5 is connected to the door panel by a spring 6 so as to be restored after the door handle is operated.

When the door handle 143 is partially lifted by rotating the rotation shaft 5 as a reference, the locking jaw 142b is lowered and the engagement with the locking protrusion 101a is released to open the door. When closing, the inclined surface of the latch head 142a enters along the inclined surface of the latch hole 109 and is restored, so that the locking jaw 142b is caught by the locking protrusion 101a to close the door 14.

The latch board 101 is provided with three to five switches S, and the positions of the switches operated by the first lever L1 and the second lever L2 are three positions. The uppermost switch is the monitor switch (S3), the lowermost switch is the secondary safety switch (S2), and the switch located between the monitor switch (S3) and the secondary safety switch (S2) is the primary safety switch. (S1).

As shown in the figure, the actuator A3 of the monitor switch S3 is formed at the lower side of the switch, and the actuators A1 and A2 of the primary safety switch S1 and the secondary safety switch S2 are It is formed in the upper part of a switch.

First, an operation process of the monitor switch S3 by the first lever L1 will be described.

When the door is closed to the main body of the microwave oven while the door is open, the push bar 144 of the door panel 141 is inserted through the bar hole 108 of the latch board 101 and the lower side of the first lever L1. The arm L12 is pushed. The upper lever L11 is pushed upward while the first lever L1 pushed by the push bar 144 rotates about the rotation axis. The switch is operated while the actuator A3 formed on the lower side of the monitor switch S3 is pushed by the upper arm L11 that is pushed up.

When the door is opened, the push bar 144 pushing the lower arm L12 of the first lever L1 is pushed backward and the pushing force is released. Accordingly, the first lever L1 of the upper arm L11 is released. Falls downward by its own weight. At this time, the stopper 201 protrudes from the lower side through which the upper arm L11 proceeds, thereby blocking the upper arm L11 falling downward so that the first lever L1 is approximately '┌' on the latch board 101. Keep it.

The following describes the operation of the primary safety switch (S1) and the secondary safety switch (S2) by the operation of the second lever (L2).

In the open state of the door, the second lever L2 is naturally formed by its own weight as shown in the figure. That is, the first arm L21 is located above the actuator A1 of the primary safety switch S1 and the second arm L22 is located above the actuator A2 of the secondary safety switch S2 based on the rotational axis. Located in, the third arm (L23) is formed in close proximity to the locking projection (101a) formed on one side of the latch hole (109), can be over the locking projection 101a so as not to fall downward by the locking projection (101a). So that it is formed.

When the door is closed, as shown in the drawing, when the latch 142 passes through the latch hole 109 and is partially rotated with respect to the rotation axis, the latch 142 is inserted into the rotation shaft 5 after being inserted. As the latch 142 is restored by the connected spring 6, the latch 142 is caught by the latching protrusion 101a of the latch board 101.

As the latch 142 is caught by the latching protrusion 101a, the latch head 142a first pushes up the third arm L23, so that the second lever L1 is partially clockwise with respect to the rotational axis. Will be rotated. As the first arm L21 is rotated, the actuator A1 of the primary safety switch S1 is pressed to operate, and the second arm L22 is operated by pressing the actuator A2 of the secondary safety switch S2. .

When the door is opened and closed by applying the latch board 101 having the above-described configuration, only two levers L1 and L2 may operate three or more switches S1, S2, S3, and the same time. The configuration may be simplified by the weight of the lever L1 (L2) and the pressing force of the latch 142 and the push bar 144 without using a separate spring as in the related art.

Hereinafter, a structure for fixing the monitor switch S3, the primary safety switch S1, the secondary safety switch S2, and the like to the latch board 101 will be described.

The monitor switch (S3) and the first safety switch (S1) may be installed one by one each, but usually two are formed on the latch board 101, a total of five microwave ovens are provided with a total of five switches. As described above, in order to be able to mount all three switches or five switches, in the present invention, two holes are formed in diagonal directions for each switch, and the latch board 101 has fixing pins corresponding to the holes Sh, respectively. 81) and a boss (not shown) were formed.

When one switch is fixed, the fixing pin 81 and the boss of the latch board 101 are inserted into the hole Sh of the switch, and fixed to the boss inserted into the hole of the switch with a short screw 9. To fix the switch S to the latch board 101.

If two switches S are fixed in parallel, they can be easily fixed by tightening them to the boss using a long screw 9 to fit the width of the overlapped switches S. At this time, the length of the fixing pin (P) is preferably at least longer than the width of the individual switch.

8 is a side view showing a second embodiment of the latch board 101 and FIG. 9 is a rear view thereof.

As shown in the figure, the latch board 101 is composed of a front portion and a rear portion by the board wall 19, the front portion of the first lever (L1) and the second lever (S2), the monitor switch (S3) , The primary safety switch (S1) and the secondary safety switch (S2) is installed, the second monitor switch (S3 ') is installed on the rear part corresponding to the monitor switch (S3), the primary safety switch (S1) ), The second primary safety switch (S1 ') is installed.

The second monitor switch S3 'and the second primary safety switch S1' may be replaced with switches having different functions.

The board wall 19 acts as a boundary when two switches are mounted in parallel. In order to operate both switches with one lever, a lever designed to penetrate the board wall 19 is required. Do.

10 and 11 are perspective views illustrating a first lever L1 ′ and a second lever L2 ′ applied to the latch board 101 of the second embodiment, respectively.

As shown in the figure, the first lever L1 ′ and the second lever L2 ′ are formed with wing portions W1 and W2 extending through the board wall 19 to the rear side of the latch board. . The wing parts W1 and W2 are means for simultaneously operating two actuators provided in the two switches when the two switches are installed in parallel.

For example, when two monitor switches S3 and S3 'are provided, the actuators A3 and A3' of each switch are positioned on the same line. At this time, in order for the first lever L 'to press both switches at once, the wing portion W1 of the first lever L1' passes through the lever through hole 191 formed in the board wall 19. Actuator A3 (A3 ') of the switch formed on the front and rear surfaces of the latch board 101 by the wing portion W1 formed on the upper arm when the push bar 144 of the door pushes the first lever L1'. Can be pressed simultaneously.

Similarly, in the case of the second lever L2 ', when the wing portion W2 is provided on the first arm, when the two primary safety switches S1 and S1' are formed on the front and rear surfaces of the board wall 19, the latch is latched. When the 142 raises the third arm, the wing portions W2 allow the actuators A1 and A1 'of the two primary safety switches S1 and S1' to be operated.

12 is a diagram illustrating a state in which the first lever L1 (L1 ') and the second lever L2 (L2') employed in the above embodiments are fixed by a hook when being fixed to the board wall.

As shown in the figure, a chamfer 55 is formed in each of the first lever and the second lever. The reason for performing the chamfer 55 is as follows.

The levers L are fitted to the rotation shaft 101c of the latch board 101, and the lever L fitted to the rotation shaft 101c is fixed by the hook 101d so as not to be separated. The hook 101d is formed so that the hook head is flipped back when the lever L is fitted and the hook head is restored after the lever L is fully fitted to the rotation shaft 101c to fix the upper end of the lever L. If the cross section of the lever L entering along the hook head is bent at right angles, the hook head may be deformed or broken.

In the present invention, in order to prevent this, the cross section of the lever (L) entering the hook head is chamfered 55 so as to be partially inclined to improve the assembly of the lever (L).

By chamfering 55 to the lever L as described above, it can be assembled without damaging the lever or hook when the lever (L) is fitted to the latch board (101).

The present invention is to close the door of the microwave oven, the latch and push bar of the door to operate three to five switches, it is possible to operate the actuator of the switch by a simple structure without the need for an elastic restoring member such as a separate spring Can be.

In addition, compared to the three levers formed on the conventional latch board to operate at least three switches, only two levers have the effect of operating three or more switches.

The screws can be simply assembled to secure the switches to the latchboard.

1 is a perspective view showing the appearance of a conventional general microwave oven

Figure 2 is a side view schematically showing a latch board mounted to the conventional microwave oven, Figure 3 is a rear view with the lever omitted in Figure 2

4 is a view illustrating a state in which a latch of a door is inserted into a conventional latch board to operate an actuator of a switch.

5 is a view showing a preferred embodiment of the latch and latch board coupling structure of the microwave oven according to the present invention;

6 and 7 are views showing the operation between the latch and the latch board by the operation of the door handle when the door of the present invention is closed, respectively

8 is a side view showing a second embodiment of the latch board and FIG. 9 is a rear view thereof.

10 and 11 are perspective views respectively showing a first lever and a second lever applied to the latch board of the second embodiment;

12 is a cross-sectional view illustrating a state in which the first lever and the second lever employed in the above embodiments are fixed by hooks when being fixed to the board wall;

** Explanation of symbols for main parts of drawings **

10: main body 101: latch board

101a: locking projection 101c: lever rotation shaft

101d: lever hook 142: latch

144: push bar L1, L2, L1 ', L2': lever

S1, S2, S3, S1 ', S3': switch

Claims (9)

A door having a latch and a push bar drawn from the inside of the door panel toward the main body; Two levers each actuated by the latch and the push bar; In the latch and latchboard structure of the microwave oven including a latchboard having a plurality of switches that the actuator is pressed by the two levers, The door latch and latch board structure of the microwave oven further comprises a door handle that is interlocked about the latch and a predetermined rotation axis. The method of claim 1, And the latch is partially rotated by the rotating shaft when the door handle is partially rotated, and then the latch is also restored by the spring when the door is returned to its original state. The method of claim 1, The switch comprises a primary safety switch, a secondary safety switch and a monitor switch, the latch and latchboard structure of the microwave oven, characterized in that each switch can be installed up to two in parallel. The method of claim 3, wherein Two holes are formed in the switch, and the latching board includes one fixing pin that protrudes and one boss having a hole therein, and the fixing pin and the boss are inserted into the hole of the switch, and the screw is inserted into the boss. Latch and latchboard structure of a microwave oven, characterized in that the switch is fixed to the latchboard by fastening The method of claim 1, One of the two levers is rotatably coupled to the latch board, and has two arms, the other arm presses the actuator of the switch while one arm is partially rotated by the push bar, and the self-weight when the push bar is released. Latch and latchboard structure of the microwave oven, characterized in that returned by. The method of claim 1, The other one of the two levers is rotatably coupled to the latch board, and has three arms, and when the latch pushes one arm to partially rotate, the other two arms press the actuators formed on the two switches, respectively, Latch and latchboard structure of a microwave oven, characterized in that when it is released, it is returned by its own weight. The method of claim 1, The switches are installed in parallel with two boards per position with the board wall therebetween, and each of the two levers has wings formed to press the actuator of the switch opposite through the board wall. Latch and latchboard structure of a microwave oven, characterized in that the through-hole is formed to flow. The method of claim 1, Each of the two levers is rotatably coupled to a pivot shaft protruding from the latch board wall, and a hook is formed on one side of the pivot shaft so that the lever is not separated by the hook when the lever is coupled to the pivot shaft. Range latch and latchboard construction. The method of claim 8, Latch and latchboard structure of a microwave oven, characterized in that the chamfer is formed on the edge of the board side entry portion of the lever.