KR20080057733A - Door lock of microwave oven - Google Patents

Abstract

A door lock system for a microwave oven is provided to prevent a door from being separated from a body by providing a fixing force for firmly fixing the door to the body even if explosion occurs in a cooking chamber. A door lock system for a microwave oven comprises a tubular shaft(110), a coupling device(120) and a driving motor(130). The shaft is horizontally disposed in a machine room(42) while rotating forward or reverse. The coupling device is mounted at the other side of a door(50). If the shaft rotates forward, the coupling device is inserted into the shaft to fix the door to the front surface of a body(40). If the shaft rotates reverse, the coupling device is separated from the shaft to release a fixed state of the door. The driving motor is coupled with the shaft to selectively rotate the shaft.

Description

DOOR LOCK OF MICROWAVE OVEN}

1 is a perspective view showing a microwave oven according to the prior art.

Figure 2 is a perspective view of a microwave oven having a door lock of the microwave oven according to an embodiment of the present invention.

3A to 3C are schematic views showing an operation relationship of the door locking device of the microwave oven illustrated in FIG. 2.

* Description of the symbols for the main parts of the drawings *

100: microwave oven door lock 110: shaft

111: coupling portion 112: receiving portion

120: coupling means 121: one side

122 knob 130 drive motor

140: fan

The present invention relates to a microwave oven, and more particularly to a door lock of a microwave oven provided in the microwave oven.

In general, a microwave oven is a cooking apparatus capable of cooking food using microwaves in an early time, and microwaves generated from a magnetron to which high voltage is applied are irradiated into the food inside the cooking chamber through a waveguide. By vibrating the water molecules contained therein to generate thermal energy, the food is heated and cooked therein.

Such microwave ovens can cook a variety of foods in a variety of ways by appropriately adjusting the microwave output and the time the microwaves are irradiated to the food, and also to heat the already cooked food or to melt frozen foods. It can also be used.

1 is a perspective view showing a microwave oven according to the prior art.

Referring to FIG. 1, the microwave oven sets a main body 10 having a cooking chamber 11 having an open front in the inside thereof, a door 20 disposed at the open front of the cooking chamber 11, and various cooking conditions. And a control panel 30 for operating or deactivating the microwave oven.

Among these, the door 20 is provided to open and close the open front surface of the cooking chamber 11 and is mounted on the front panel 12 of the main body 10. The door 20 is mounted on the front panel 12 of the main body 10, one side of which is rotatably coupled to the front panel 12 by a hinge 21. In addition, the door 20 is provided with a plurality of hooks 22 on the other side thereof, so that the hooks 22 are caught by the locking portions 13 formed on the front panel 12, so that the front panel 12 is closed. Both sides thereof are coupled to each other so that the entire surface of the cooking chamber 11 is intermittently opened.

In addition, a predetermined portion of the control panel 30 is provided with a door button 31. When the door button 31 is pressed by a user, the front panel 12 receives the hook 22 provided on the door 20. The door 20 is opened by detaching from the locking portion 13 formed in the upper side.

However, according to this conventional microwave oven, the door 20 is fixed on the front panel 12 only by the hook 22 which is engaged by the hinge 22 and the locking portion 13, which is fixed from the outside. Since the rigidity is insufficient to support a large force, when the explosion due to abnormal operation and abnormal cooking occurs, the door 20 does not support it and falls off, which may threaten the safety of the user.

Therefore, there is a need for improvement.

The present invention has been made by the necessity as described above, and provides a door lock device of a microwave oven for fixing the door firmly on the main body so that the door is not separated from the main body even if an explosion caused by abnormal operation and abnormal cooking. There is a purpose.

The door lock device of the microwave oven according to the present invention comprises: a main body formed so that the cooking chamber and the electrical equipment room are adjacent to each other, and a microwave oven having a door which opens and closes the cooking chamber by rotating about one side. Applied, the tubular shaft is arranged horizontally in the interior of the electric compartment, and selectively rotates in one side or the other in the axial direction; Is mounted on the other side of the door, when the shaft is rotated in one axial direction is inserted into the shaft and fixed to the front of the main body, and when the shaft is rotated in the other direction in the axial direction is separated from the shaft and the Coupling means for releasing a fixed state; And a driving motor mounted to an inner rear side of the electrical equipment room and coupled to the shaft to selectively rotate the shaft.

In addition, the outer peripheral surface of the shaft is preferably equipped with a fan that rotates in accordance with the rotation of the shaft.

In addition, the coupling means, one side is rotatably coupled to the other side of the door so that one side is inserted into the inside of the electric chamber and the other side protrudes to the outside of the door, one side is formed with a screw thread, the other side to support the outside of the door It is preferable that the knob is integrally formed.

In addition, the shaft, the coupling portion formed with a screw thread on the inner peripheral surface to engage with one side of the coupling means therein; And it is preferable to include a receiving portion for receiving therein the coupling portion is formed extending from the coupling portion to have a larger diameter than the coupling portion.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of a door lock device of a microwave oven according to the present invention. For convenience of description, the door lock of the microwave oven provided in the microwave will be described as an example. In this process, the thickness of the lines or the size of the components shown in the drawings may be exaggerated for clarity and convenience of description. In addition, terms to be described below are terms defined in consideration of functions in the present invention, which may vary according to the intention or convention of a user or an operator. Therefore, the definitions of these terms should be made based on the contents throughout the specification.

Figure 2 is a perspective view of a microwave oven having a door lock of the microwave oven according to an embodiment of the present invention.

Referring to the drawings, the door lock device 100 of the microwave oven according to an embodiment of the present invention, the main body 40 and the main body 40 is formed so that the cooking chamber 41 and the electric compartment 42 are adjacent to each other therein ( 40) It is applied to the microwave oven having a door 50 that is mounted on the front and rotates about one side to open and close the cooking chamber 41, the shaft 110, the coupling means 120 and the drive motor 130 It includes.

First, the shaft 110 is disposed to be horizontally disposed in the electrical equipment chamber 42 so as to be selectively rotated in one or the other directions in the axial direction, and the shaft 110 is formed in a tubular shape having a hole therein, one end of which will be described later. By coupling to the drive motor 130, it is fixed inside the main body 40.

The shaft 110 may be divided into a coupling part 111 and a receiving part 112, wherein the coupling part 111 is a part in which one side of the coupling means 120 to be described later is engaged and moved therein. As a screw thread is formed on the inner circumferential surface to engage with one side of the coupling means 120, the receiving portion 112, one side of the coupling means 120 moved toward the rear of the main body 40 through the coupling portion 111 As a part accommodated therein, the coupling portion 111 and the coupling means 120 is formed extending from the coupling portion 111 toward the rear of the main body 40 to have a larger diameter. In this case, the shaft 110 as described above is preferably formed of a metal material having sufficient rigidity to withstand the explosion pressure that may occur inside the cooking chamber.

Next, the coupling means 120 is mounted on the other side of the door 50, that is, on the opposite side of the rotation shaft of the door 50, and is preferably mounted on the center of the other side of the door 50, and has a substantially circular rod shape. Is formed to penetrate through the door 50, it is rotatably coupled to the door 50. In the coupling means 120 as described above, one side 121 protruding into the inside of the door 50 is inserted into the electric chamber 42 through the through hole 43 formed in the front of the main body 40, A screw thread is formed on the outer circumferential surface thereof, and a knob 122 for supporting the outside of the door 50 is integrally formed on the other side protruding to the outside of the door 50. At this time, the coupling means 120 as described above, like the shaft 110, is preferably formed of a metal material with sufficient rigidity to withstand the explosion pressure that may occur inside the cooking chamber.

Finally, the drive motor 130, which is mounted on the rear inside the electric compartment 42, can be driven by the internal power source of the microwave oven, is coupled to one end of the shaft 110 to connect the shaft 110 to the main body ( 40) It serves to selectively rotate the shaft 110 while being fixed on the inner back.

According to the door lock device 100 of the microwave oven according to an embodiment of the present invention as described above, when cooking is started in the cooking chamber 41, the door 50 may be firmly fixed on the main body 40. By providing an additional fixing force, the door 50 is not separated from the main body 40 even when an explosion occurs due to abnormal operation or abnormal cooking in the cooking chamber, and the door 50 is opened by the explosion inside the cooking chamber 41. There is an effect of protecting the user from the danger that may be caused by the deviation from 40.

Meanwhile, the door lock device 100 of the microwave oven according to an embodiment of the present invention may further include a fan 140 mounted on an outer circumferential surface of the shaft 110, and the fan 140 may include a shaft ( By rotating in accordance with the rotation of 110, it can serve as a ventilation fan generally provided in a conventional microwave oven. Accordingly, the door lock device 100 of the microwave oven according to an embodiment of the present invention, as one shaft 110 and the drive motor 130, the lock of the door 50 and the internal ventilation of the body 40 at the same time By being able to realize, the microwave oven equipped with the door lock device 100 of the microwave oven does not need to separately provide a device for locking the door 50 and the internal ventilation of the main body 40.

3A to 3C are schematic views showing an operation relationship of the door locking device of the microwave oven shown in FIG.

Hereinafter, an operation relationship of the door lock device of the microwave oven according to an embodiment of the present invention will be described in detail with reference to FIGS. 3A to 3C.

First, when the driving motor 130 operates as the cooking starts in the cooking chamber, the driving motor 130 rotates the shaft 110 to one side in the axial direction, as shown in FIG. , One side 121 of the coupling means inserted into the electric chamber 42 is inserted into the shaft 110.

In more detail, in the state in which one side 121 of the threaded coupling means is inserted into the electric compartment 42 through the through hole 43 formed in the front of the main body 40, the drive motor 130 When is activated, the shaft 110 is rotated to one side in the axial direction. At this time, the coupling portion 111 of the shaft 110 which is in contact with one side 121 of the coupling means, the screw thread is formed on the inner circumferential surface so as to be engaged with one side 121 of the coupling means, such a shaft 110 By rotation of), the coupling means 120 is moved toward the receiving portion 112 while one side 121 is inserted into and engaged with the coupling portion 111.

At this time, the user can facilitate the initial engagement of the coupling portion 111 of the shaft 110 and the coupling means one side 121 by pushing and rotating the knob 122 before the driving motor 130 is operated. have.

Then, as shown in Figure 3b, when one side 121 of the coupling means is completely moved into the receiving portion 112, the engagement of the one side 121 and the coupling portion 111 of the coupling means is released, In the state where the door 121 is locked to the shaft 110 in the receiving portion 112, and in this state, the knob 121 located outside the door 50 supports the door 50 to the inside, whereby the door 50 is the main body ( 40), so that it is firmly fixed so as not to be separated. At this time, as the shaft 110 rotates, the fan 140 mounted on the outer circumferential surface of the shaft 110 also rotates, thereby performing internal ventilation of the main body 40.

Meanwhile, when cooking is completed in the cooking chamber 41, as shown in FIG. 3C, the driving motor 130 rotates the shaft 110 in the other direction in the axial direction, that is, in the direction opposite to the initial rotation direction. Accordingly, one side 121 of the coupling means located in the receiving portion 112 of the shaft 110 moves toward the door 50 while being engaged with the coupling portion 111, and one side 121 of the coupling means is moved. When the movement completely within the coupling portion 111, while leaving completely inside the shaft 110, the coupling state of the shaft 110 and the coupling means 120 is completely released.

At this time, the user, by performing the operation of pulling the knob 121 at the time when the drive motor 130 is operated, the first engagement of the coupling portion 111 and the coupling means 120 of one side of the shaft 110 is easy. When the movement of the coupling means one side 121 in the coupling portion 111 is completed, the knob 122 is rotated again to rotate the coupling state of the shaft 110 and the coupling means 120. You can release it more clearly.

On the other hand, in the present embodiment, the coupling means 120 is illustrated as being capable of manually rotating operation by the rotation operation of the knob 121 located outside the door 50, in contrast, the coupling means 120, the door It may be provided in a fixed form on the 50.

Although the present invention has been described with reference to the embodiments shown in the drawings, this is merely exemplary, and various modifications and equivalent other embodiments are possible to those skilled in the art. Will understand. In addition, while the microwave door lock has been described as an example, this is merely exemplary, and the door lock device of the present invention may be used in a device other than the microwave oven. Therefore, the true technical protection scope of the present invention will be defined by the claims below.

As described above, the door lock device of the microwave oven according to the present invention, unlike the prior art, by providing an additional fixing force that can securely fix the door on the main body when cooking is started inside the cooking chamber, abnormality in the cooking chamber Even if an explosion occurs due to an operation or abnormal cooking, the door is not separated from the main body, thereby protecting the user from a danger that may occur as the door is separated from the main body by the explosion inside the cooking chamber.

In addition, the present invention, as a shaft and a drive motor, by realizing the locking of the door and the ventilation inside the main body at the same time, the microwave oven equipped with the door lock of the microwave oven, the device for locking the door and the ventilation inside the main body There is no need to provide each separately.

Claims (4)

In the door lock device of the microwave oven of the microwave oven having a main body is formed so that the cooking chamber and the electric chamber adjacent to each other and the main body is mounted on the front of the main body and rotates about one side to open and close the cooking chamber, A tubular shaft disposed horizontally in the electric compartment and selectively rotating to one side or the other in the axial direction; Is mounted on the other side of the door, when the shaft is rotated in one axial direction is inserted into the shaft and fixed to the front of the main body, and when the shaft is rotated in the other direction in the axial direction is separated from the shaft and the Coupling means for releasing a fixed state; And The door lock device of the microwave oven is mounted on the inner rear of the electric compartment, and comprises a drive motor coupled to the shaft to selectively rotate the shaft. The method of claim 1, The outer circumferential surface of the shaft is a door lock device of a microwave oven, characterized in that the fan is rotated in accordance with the rotation of the shaft. The method according to claim 1 or 2, The coupling means is rotatably coupled to the other side of the door so that one side is inserted into the inside of the electric chamber and the other side protrudes out of the door, and a thread is formed on one side, and a knob for supporting the outside of the door on the other side. Door lock of the microwave oven, characterized in that formed integrally. The method of claim 3, wherein the shaft, A coupling portion formed with a screw thread on an inner circumferential surface to be engaged with one side of the coupling means therein; And And a receiving part configured to receive the coupling part inserted therein and extending from the coupling part to have a larger diameter than the coupling part.

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