KR200232705Y1 - Close contact structure of microwave oven door and front plate - Google Patents

Abstract

The present invention relates to a close contact structure of the door and the front plate of the microwave oven, and conventionally a high frequency leaks to the outside as the gap between the door and the front plate increases due to a tolerance occurs in the hook is installed on the door and the front plate There was a problem.

Therefore, the present invention is formed by inclined at the same angle to the hook portion 111 and the operation portion 112 for operating the micro switch 200 on the hook 110 is hook 110 and the hook 110 to the hook 110. Even if a tolerance occurs in the 220, the locking jaw 220 formed on the front plate is caught by the hanging portion 111, so that the door 100 and the front plate 200 can be brought into close contact with each other. The micro switch 300 for controlling the circuit is installed at a position that can be pressed by the operation unit 112 of the hook 110 even when the locking jaw 220 is caught at both ends of the hook portion 111. Even if a tolerance occurs in the locking jaw 220, the door 100 may be operated according to the opening and closing of the door 100, thereby preventing the leakage of high frequency and improving the safety.

Description

Close contact structure of microwave oven door and front plate

The present invention relates to a door structure of a microwave oven, and more specifically, to form a hanging part that can cover a tolerance on the hook of the door, so that the tolerance occurs during the injection state or assembly of the hook and the locking jaw. The present invention relates to a close contact structure of a door and a front plate of a microwave oven, which can reduce the leakage of microwaves into a gap between the door and the front plate.

In general, the microwave oven is configured to place food on a tray in a cooking chamber and to irradiate the high frequency generated by the magnetron into the cooking chamber so that the food is heated and cooked by the high frequency. Among these microwave ovens, a microwave oven that heats and cooks food only by high frequency is called a single function microwave oven. A microwave oven having a grill and oven function as well as the high frequency as well as the convection of hot air by a radiant heat of a heater or a convection fan are multifunctional. It is called a microwave oven.

The above-mentioned single-function microwave oven and multi-function microwave oven are divided into a cooking chamber and an electric field chamber. The electric field chamber includes a magnetron and a waveguide that emit microwaves by applying a high voltage by a high voltage transformer and a high voltage transformer. In addition, a cooling fan for cooling the high heat generated while the high voltage transformer and the magnetron are operated and a duct for inducing the wind of the cooling fan to the inside of the cooking chamber are installed.

In addition, a tray rotated by a tray motor is installed at the lower portion of the cooking chamber to disperse high frequency radiated to the cooking chamber through the waveguide to effectively cook food. The reason for rotating the tray is that the high frequency irradiated into the cooking chamber through the waveguide is always constant. This is to rotate the filter to prevent the heating of only one portion of the food by being irradiated only in the direction so that the high frequency is uniformly irradiated on the food placed on the tray.

In addition, the front door of the cooking compartment of the front of the microwave oven is assembled with a door frame and the inner and outer plates, door screens, door plates, etc., and the front side of the microwave oven is installed on the front side of the microwave oven. As the PCB circuit board is installed to perform various functions, a control panel is installed on the surface of which a button or the like is installed to select various functions of the circuit board.

Looking at the door structure of the microwave oven, which is currently applied among the doors and control panels of the microwave oven, the inside of the door frame is usually compact so that the inside can be seen by pressing the outer plate and the iron plate which are transparently formed of glass or reinforced plastic. It is composed of a door screen, which is open to a myriad of holes, a door plate supporting the door screen, an inner plate preventing dust from being introduced into the door screen, and a dust cover.

And when the door is installed on the front plate of the microwave oven, one side of the door is usually pinned to the hinge of the front panel, and then the entire door is rotated and opened on the front of the microwave oven around the pin axis of the hinge. It is commercialized by adopting the up / down door structure that opens and closes from top to bottom.

In addition, a hook is installed at the other side of the door, and a lock device is installed at the front of the cavity, so that the user can open the door by pressing a door button formed at one side of the control panel.

Wherein the locking device is the upper and lower hooks of the door is a ruled and unlocked, consisting of a variety of micro switch and the rotation lever, the lock device configured as described above is provided with a separate bracket, the components are to be installed. In addition, the front plate on which the lock device bracket is installed is formed with a hole corresponding to the center hole formed in the lock device bracket, and the lock device bracket is fixed to the flange formed to the rear of the front plate.

Therefore, after the lock device bracket is installed as described above, the hook of the door enters and exits the lock hole of the lock device through the hook hole of the front plate, so that the hook is locked and released and the door is opened accordingly. The micro switch is used interchangeably with the name of the limit switch (safety switch) and is used to detect the displacement mechanically. For example, when the door is opened in a microwave oven, the open and close state of the door is judged. By energizing the load, the high frequency radiated to the cooking chamber does not leak out of the microwave oven.

When the lock device configured as described above closes or opens the door, three micro switches installed in the lock device, that is, the primary safety switch, the secondary safety switch, and the monitor switch are interlocked due to the hook and the lever interlocked by the hook. The duct is provided with a lamp that is illuminated into the cooking chamber and a magnetic switch for damper to open and close the intake hole, and each switch of the lock device and the lamp and the magnetic switch of the duct are connected by a harness line to be interlocked and operated. .

In addition, one side of the door plate, the hook is installed in the upper and lower of the operation opening, respectively, the coil spring is installed at the lower end of the operation opening, the hook hole is formed on the front plate of the microwave oven, the lower portion to allow the hook to enter.

Therefore, when the door is closed, the hook passes through the hook hole, and the upper and lower hooks are raised along the inclined surface of the locking hole installed therein, so that the coil spring installed at the bottom of the operating hole is tensioned and the hook is completely passed. As the coil spring is lowered by the restoring force, it is caught by the catch.

In addition, when the door button provided in the control panel is pressed to open the door, the door button rotates the lever of the locking device, and the lever rotated as described above operates the hatching port. As the hook is pushed up, the upper and lower hooks integrated together by the operating holes are lifted together and released from the latch.

However, as shown in FIG. 1, the gap between the door 10 on which the hook 11 is installed and the front plate 20 of the microwave oven on which the hook hole is formed is the length B of the hook 11 and the locking device. It is determined by the distance (A) between the locking jaw 21 and the front plate (20) of. Here, the length (B) of the hook 11 has a tolerance of about ± 0.2 mm depending on the assembly and injection state, the distance (A) between the locking jaw 21 and the front plate 20 of the locking device is also about ± 0.5 mm Has a tolerance of.

In a conventional microwave oven, the larger the gap between the door and the front plate, the greater the leakage of microwaves. Therefore, the gap between the door and the front panel should be kept to a minimum to reduce the leakage of microwaves, which are harmful to human body. There is a limit in minimizing the gap between the door and the front plate due to the tolerance caused by the injection state or assembly of the.

Therefore, an object of the present invention is to solve the above problems, by reducing the gap between the door and the front plate caused by the assembly tolerance, etc. of the microwave oven door and the front plate to reduce the leakage of microwave irradiation to the cooking chamber To provide a close structure.

This object of the present invention is achieved by bending the hook installed in the door at a predetermined angle to form a ruler portion and install a micro switch in a position that can be operated by the operation portion extended from the ruler portion.

The present invention forms a ruler that can cover the tolerance on the hook, so that even if the position of the hook or the hook is changed by the tolerance, the catch is caught by the hook of the hook, thereby preventing the gap between the door and the front plate. Since it is possible to achieve the above object.

BRIEF DESCRIPTION OF THE DRAWINGS The principal part sectional drawing which shows the conventional structure.

Figure 2 is a sectional view of the main portion showing an embodiment according to the present invention.

Explanation of symbols for main parts of the drawings

100: door 110: hook

111: ruler portion 112: operation portion

210: locking device 220: locking jaw

300: micro switch

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings, which are attached to the technical configuration and the effect of the present invention.

That is, Figure 2 is a main portion sectional view showing an embodiment according to the present invention is installed on the door 100, the hook 110 for fixing the door 100 to the front plate 200 in the front plate 200 lock device 210 Hanging part 220 is formed in the hook 110 and inclined at a predetermined angle to compensate the tolerances occurring in the hook 110 and the locking step 220, and extending from the ruled portion 111 and the micro switch To operate the 300 and to form an operation unit 112 inclined at the same angle as the hanging portion 111, so that the micro switch 300 can be operated by the operation unit 112 of the hook 110. It is characterized in that the installation along the inclination angle of the operation unit (112).

In the drawing, reference numeral 200 denotes a front plate of the microwave oven, and 310 denotes a micro switch operated according to opening and closing of the door.

The present invention formed as described above has a length of the hook 110 due to a tolerance generated when the hook 110 is formed or a tolerance generated when the hook 110 is formed or assembled when the hook 110 is formed or when the hooking jaw 220 is installed. (B) and the difference between the length (A) of the locking step 220 is to prevent the gap between the door 100 and the microwave front plate 200 to increase, and the micro switch 300 of the hook 110 Since the bottom portion is installed to have an inclination of the same angle as the operation portion 112 formed on the portion extending from the ruler portion 111 and the ruler portion 111, the operation portion of the hook 110 according to the opening and closing of the door 100 ( 112, the micro switch 300 can be operated even if the position of the hook 110 is changed by the tolerance as shown in the dotted line of FIG.

That is, even when the position of the hook 110 is changed by the tolerance as shown in FIG. 2, when the door 100 is closed, the locking jaw 220 is positioned at the hanging portion 111 of the hook 110, and the hook 110 is located. The door 100 is in close contact with the front plate 200 by the hook 110 and the locking jaw 220 because it has a force to advance downward by the force of the spring (not shown in the figure) to reduce the leakage of high frequency Will be.

In addition, the micro-switch 300 is installed inclined at the same angle as the operation unit 112 below the operation unit 112 of the hook 110, even when the locking jaw 220 is located at both ends of the hanging portion 111. The operation unit 112 is installed in a position where the operating port 310 of the micro switch 300 can be pressed so that the hook 110 and the locking jaw 220 can be changed in position by the tolerance of the door 100. The micro switch 300 can operate according to the opening.

As described above, the present invention forms a ruled part and an operation part that are inclined at a predetermined angle in a hook installed in the door of the microwave oven, so that even if a tolerance occurs in the hook or the jaw, the latched part is caught in the door and the front plate. It is possible to reduce the gap between, and the micro switch is installed in the lock device, but even when the latching jaw is located at both ends of the hanging part, it is installed to have the same inclination angle as the operating part in a position that can be operated by the operating part. By the micro switch can operate even if the position of the hook and the jaw is changed by the excellent safety and the effect of reducing the leakage of high frequency to protect the user from the risk of electromagnetic waves.

Claims (1)

A hook portion 111 inclined at a predetermined angle is formed on the hook 110 of the door that is caught by the latching jaw 220 of the microwave oven front plate 200, and at the end thereof, the operation portion (at the same angle as the ruled portion 111) ( 112 is formed, the upper surface of the micro-switch 300 having the operating port 310 is also installed at the same angle as the operating unit 112, the operating port of the micro switch 300 by the operating unit 112 ( Close contact structure of the door and the front plate of the microwave oven, characterized in that 310) can be operated.