KR19990039968A - Opening and closing structure of microwave oven door - Google Patents

Abstract

The present invention relates to a door opening and closing device of a microwave oven using a halogen lamp together.

The door D according to the present invention has a double latch structure. Therefore, the user is configured to open the door only after releasing the fastening state of the second latch mechanism in a state in which the fastening state of the first latch mechanism is released by an operation. And according to the fastening and release of the latch mechanism, it is configured to further include a door switch to block the supply of current to the inside of the microwave while being on and off. According to the structure of such a microwave oven, when the door is opened, all of the first latch mechanism and the second latch mechanism must be operated, which can delay time in opening the door, and thus light remaining in the halogen lamp. After this is completely erased the door is opened.

Description

Opening and closing structure of microwave oven door

The present invention relates to a door opening and closing structure of a microwave oven, and more particularly, to a door opening and closing structure of a microwave oven having a double latch structure in consideration of the safety of the microwave oven and the residual light amount of the halogen lamp in a microwave oven incorporating a halogen lamp together. It is about.

Various kinds of apparatuses have been proposed to date as heating apparatuses for heating foods. The most primitive heating mechanism is a container of a predetermined shape in direct contact with a heat source, and the contents to be cooked are placed in such a container, and the desired cooking is performed by applying heat.

In addition, many types of cooking apparatuses have been developed that use electric energy directly or indirectly. As an example, a microwave oven using microwaves as a heating source may be cited. A microwave oven is a cooking apparatus in which microwaves are generated using electricity, and the microwaves penetrate the object to be cooked, causing molecular motion inside the object, and thereby heating. Such a microwave oven is widely spread due to its simple configuration and ease of use, such as a thawing process for melting frozen food, or a device for heating food such as milk to a predetermined temperature. It is used.

However, the microwave oven cannot be said to be suitable for heating various objects due to the disadvantages in use due to the heating method and the limitation of its output. That is, the conventional microwave oven using only microwaves as a heating source is pointed out that there is a problem in that it is not possible to provide fast and high-quality cooking because of the unity of the heating method by the microwave and its output. . For example, when heated by microwave, the object is heated both inside and outside together, but this advantage is a significant disadvantage depending on the cooking object. When cooking pizza as described later, it is judged that heating by microwaves is not suitable due to the properties of the object. In addition, it is also pointed out that in the case of heating by a microwave oven, too much moisture is removed from the object.

For these current microwave ovens, various types of microwave ovens using different heat sources have been developed and commercialized. For example, a microwave oven capable of performing suitable heating on various cooking objects by attaching a heat generator, which can be said to be another heat source, separate from the microwaves. In this way, however, even in a microwave oven in which the heater is built, it is true that such a heater does not have various functions as a whole because it only serves as another heat source. For example, in order to cook pizza and silver food properly, the surface must be properly heated to have a crunchy cooking state, and the inside of it should be able to obtain a heating degree that is sufficiently ripe but does not drain much moisture. . However, it is true that the present microwave oven does not satisfy such cooking characteristics.

In conclusion, when heating by the conventional microwave only, the limitation of the heating method of the single method of heating by the microwave, the disadvantages of the output, and various disadvantages due to the evaporation of water have been pointed out. Even in the case of installation, the above-mentioned disadvantages cannot be sufficiently solved.

Unlike the conventional microwave oven described above, as another heating device, a heating device using only light waves as a single heating source has been proposed. That is, according to US Pat. No. 5,036,179, a mass cooking apparatus is disclosed that is suitably used for a specific desired dish using a lamp that emits visible light and infrared light. According to the above-mentioned United States patent, at least 90% of the radiant energy uses a lamp having a wavelength of 1 μm or less as a heating source, and by appropriately using visible and infrared rays emitted from such a lamp, a specific dish such as pizza To be done.

Specifically, the difference between the wavelengths of the infrared light and the visible light is represented by the difference in the heating method by the different wavelengths applied to the object, and the outside and the inside of the object are heated in different forms due to the difference. According to such a light-wave heating apparatus, for example, in the case of a pizza, it is possible to obtain a cooking state in which the outside has a crunchy heating degree and the inside is sufficiently heated and softly heated with a predetermined moisture. . However, such a heating device according to the United States patent, can be used only for commercial or industrial use to produce large quantities of pizza quickly, especially after the limitation of use that can not take advantage of the existing microwave oven using microwave. Following.

As described above, in order to use a lamp that simultaneously emits light waves, specifically visible light and infrared light, as a heating source for heating a cooking object, it must be a lamp capable of sufficiently providing visible light such as infrared light. In the case of use, since the amount of light generated by the lamp is considerable, light remains for about 2 seconds even after the current is interrupted.

1 shows an opening and closing structure of a door of a general microwave oven. The opening / closing structure of the door 2 shown in FIG. 1 is a door opening and closing structure of a conventional microwave oven mainly using microwaves as a heating source. Looking at the configuration, the latch member (3) having the latch (3a, 3b) formed in the upper and lower sides of the door (2) is elastically supported by the spring (7). In addition, a latch board 5 having latching portions 5a and 5b latched to the latches 3a and 3b, respectively, is provided at the front of the microwave oven, and the latching portion is disposed around the latching portions 5a and 5b. Door switches 4a and 4b which are turned on / off by 3a and 3b are provided.

In the state shown in FIG. 1, the door 2 is closed, and the latches 3a and 3b are locked to the latching portions 5a and 5b, respectively. The door switches 4a and 4b are in the on state. In this state in which the door 2 is closed, power may be applied to the magnetron and the high-pressure transformer for generating microwaves, and in this state, heating is performed by supplying microwaves.

As the user pulls the door handle 1 in this state, the latches 3a and 3b are released from the latching portions 5a and 5b, and the latches 3a and 3b release the door switches 4a and 4b. Turned off. When the door switches 4a and 4b are turned off, supply of current for microwave generation is stopped.

However, in the conventional structure, it can be seen that the door 2 is configured to open as soon as the latches 3a and 3b are released. Of course, at the moment the door 2 is opened, the current supplied to the inside of the microwave is turned off, so that microwaves are not generated. However, when the halogen lamp is mounted inside the microwave as described above, the door is opened and closed. Becomes undesirable.

As described above, the amount of light generated in the halogen lamp is relatively large, and even if the power supply is interrupted, even if the power is interrupted (about 2 seconds), since light remains inside the cavity, if the door is opened immediately, The user is visually inconvenient. That is, the user may feel uncomfortable in performing a desired operation such as dazzling by the remaining light.

An object of the present invention is to provide a door opening and closing structure of a microwave oven which can delay the opening of the door by the time of light remaining.

Another object of the present invention is to provide a safe door opening and closing structure that can reliably cut off the electric current of the microwave oven supplied into the inside when the door is opened.

1 is a cross-sectional view showing a door opening and closing structure of a conventional microwave oven.

Figure 2 is an exemplary cross-sectional view illustrating the operating state of the door according to the present invention.

Figure 3 is an exemplary cross-sectional view illustrating the operating state of the door according to the present invention.

* Explanation of symbols for main parts of the drawings

10: handle lever 12a: first upper latch

12b: first lower latch 14: spring

16a, 16b, 16c: door switch 20: opening and closing button

22: second latch 24: spring

According to the present invention for achieving the above object, a cavity that is a space for heating the object, a door hinged to the main body to open and close the cavity, and a first latch means for fastening / releasing the door to the main body, And it discloses a door opening and closing structure comprising a second latch means for fastening / releasing the door to the main body. According to such a structure, since the engagement state of the said 1st latch means and the 2nd latch means must be released simultaneously in order to open a door, the time for opening a door can be delayed.

And according to another embodiment of the present invention, by interlocking with the first latch means and the second latch means, to control the supply of current in the microwave oven, by further comprising a door switch connected in parallel to each other Safety is secured by opening and closing the door.

Next, the present invention will be described in more detail with reference to the embodiments shown in the drawings.

According to the present invention, the halogen lamp D according to the present invention having a separate heating source has a first fastening part interlocking with the handle lever 10 and a separate handle lever 10. The second fastening part is provided by the opening / closing button 20 so that the first fastening part and the first fastening part can be opened when the first fastening part and the first fastening part are released together by a two-step operation. In other words, the door D itself is configured to be opened only after the two-step release operation is performed, thereby delaying the opening time of the door D for a predetermined time and ensuring safety for supplying current to the interior.

2 is a cross-sectional view showing a state in which only the first fastening portion controlled by the handle lever 10 is released, and FIG. 3 is a state in which the second fastening portion controlled by the opening / closing button 20 is also released. It is a cross section.

First, the configuration of the first fastening unit interlocked with the handle lever 10 according to the present invention will be described. The handle lever 10 according to the present invention is installed on the rear surface of the door handle 11 and is a part which is pulled when the user wants to open and close the door D. The handle lever 10 controls the first fastening portion to be described below, and is configured to release the fastening state of the first fastening portion by the manipulation of the handle lever 10. The handle lever 10 has a U-shape, and a first upper latch 12a and a first lower latch 12b are pinned to the respective inner end portions 10a and 10b. End portions of the first latches 12a and 12b are caught by the engaging portions 15a and 15b, which will be described later, so that the door D can be kept closed.

The first latches 12a and 12b are rotatably supported by pins Pa and Pc at their central portions, respectively. Accordingly, when the handle lever 10 is pulled in the direction indicated by the arrow and the ends 10a and 10b are moved to the left in the drawing, the first upper latch 12a and the first lower latch 12b are respectively the pins ( The locking state of the locking portions l5a and 15b is released while rotating counterclockwise around Pa and Pc.

The first upper latch 12a and the second upper latch 12b are connected to the connecting lever 13 and the pins Pb and Pd, respectively, and the connecting lever 13 is always connected by a spring 14. It is elastically supported downward. Subsequently, the connecting lever 13 is supported downward by the elastic force of the spring 14, and the connecting lever 13 connects the first upper latch 12a and the first lower latch 12b to the pin Pa. Elastic force is applied in the clockwise direction with respect to Pc). Accordingly, the first latches 12a and 12b can be held by the latching portions 15a and 15b by the elastic force of the springs 14. In this locking state, the above-mentioned locking state is released by pulling the handle lever 10 as described above, and the locking state of the first fastening portion is first released. 2 illustrates a state in which the fastening of the first fastening portion is released.

In addition, latching portions 15a and 15b are formed on the front surface of the microwave oven in which the doors are in close contact with the first latches 12a and 12b. The locking portions 15a and 15b are formed on the upper and lower portions of the latch board 15, and in the vicinity of the locking portions 15a and 15b, a pair of on / offs are turned on and off by the first latches 12a and 12b. Door switches 16a and 16b are provided. Therefore, when the first latches 12a and 12b are caught by the latching portions 15a and 15b, one side of the first latches 12a and 12b turns on the door switches 16a and 16b. When the first latches 12a and 12b are released from the latching portions 15a and 15b, the door switches 16a and 16b are turned off to cut off the supply of current into the microwave oven.

According to the present invention, the door (D) is not opened even if the first fastening state is released primarily by operating the handle lever 10 as described above. However, when the first fastening portion is released, that is, when the first latches 12a and 12b are released, the supply of current to the inside of the microwave is cut off so that the generation of microwaves is stopped and the halogen lamp does not emit light. However, in the halogen lamp, even if the supply of current is interrupted, since the remaining light remains for about 2 seconds as described above, it is not preferable for the user to open the door immediately. Therefore, even if the first latches 12a and 12b are released as described above, the door D is not opened, and the second fastening part by the operation of the opening / closing button 20 is released as described below.

Next, with reference to FIG. 3, the structure of the 2nd fastening part by this invention, ie, the structure of a 2nd latch, is demonstrated.

As shown in the drawing, the second fastening part includes an opening / closing button 20 installed on the front surface of the door D having a structure of a push button, and a second latch 22 operated by the opening / closing button 20. .

The opening and closing button 20 is configured as a push button type on the front of the door (d), is always elastically supported toward the front by the spring (24). The rear end of the opening / closing button 20 maintains a contact state so as to be interlocked with the second latch 22. The second latch 22 is rotatably provided by the pin Pe at the center thereof, and the inner end thereof is configured to be caught by the locking portion 15c. In addition, since the second latch 22 is elastically supported in the clockwise direction by the spring 25, if there is no external force, the second end 22 maintains a state where the inner end is caught by the locking portion 15c.

Accordingly, when the user presses the opening / closing button 20, the inner end 20a of the opening / closing button 20 presses the front end 22a of the second latch 22, and thus the second latch 22 is The pin Pe is rotated counterclockwise with increasing depth. By this rotation, the inner end portion 22b of the second latch 22 is released from the engagement with the locking portion 15c.

Further, another door switch 16c is provided near the locking portion l5c to which the second latch 22 is fastened. The door switch 16c is in the on state when the second latch 22 is in the fastening state, and becomes a state capable of supplying current to the inside of the microwave oven, and is in the off state when the fastening state is released. The supply of current is cut off.

According to the present invention, since the two door switches 16a and 16b operated by the handle lever 10 and the door switch 16c operated by the opening / closing button 20 are connected in parallel, respectively, When one door switch 16a, 16b, 16c is turned off, the supply of current is cut off inside the microwave oven.

The door D according to the present invention is configured such that the door D can be opened only when the first latches 12a and 12b and the second latch 22 are released at the same time. In the above description, the operation of the opening / closing button 20 is described after operating the handle lever 10, but the door D is open even if the operation procedure is different. That is, according to the present invention, the technical gist of the present invention is to configure the door D not to open unless the two latch mechanisms, that is, the first latches 12a and 12b and the second latch 22 are not released at the same time.

In other words, in order to open and close the door D, the technical gist of the first fastening part (first latch) and the second fastening part (second latch) are configured to be released. And the configuration of the first latch and the second latch can be of course other variations within the range having a predetermined fastening structure.

According to the present invention configured as described above, when the halogen lamp is used as another heating source, the visual disturbance of the user can be solved by the residual light of the halogen lamp. That is, in order to open the door D, the two latch mechanisms must be released together, and the operation of releasing the two latch mechanisms can have a delay time as compared with the conventional one using one latch mechanism. This delay time can protect the user's eyes from the light remaining in the halogen lamp when the power is cut off, thereby improving usability.

In addition, by installing a door switch connected in parallel to each of the first latch and the second latch, it is possible to ensure the safety that can more accurately cut off the internal power supply when opening and closing the door (D).

Claims (6)

A cavity that is a space for heating an object; A door hinged to the body to open and close the cavity; First latch means for fastening / releasing the door to the main body; And And a second latch means for fastening / releasing the door to the main body. The door opening and closing device of the microwave oven according to claim 1, further comprising a door switch interlocked with the first latching means and the second latching means, controlling the supply of current in the microwave oven, and connected in parallel. . The door opening and closing device of the microwave oven according to claim 1 or 2, wherein a light emitting lamp which is a separate heating source is installed inside the cavity. The method of claim 1 or 2, wherein any one of the latch means; A handle lever interlocked with the handle of the door; A latch that is elastically supported in a fastened state and rotates by a handle lever; And The door opening and closing device of the microwave oven, comprising a locking portion installed on the main body so as to be engaged or released with the latch by the rotation of the latch. The door opening and closing device for a microwave oven according to claim 4, wherein the latch is formed in a pair formed at upper and lower portions of the handle lever. The method of claim 4, wherein the other of the latch means; An opening and closing button installed at the front of the door; A latch rotated by the opening and closing button and elastically supported in a fastened state; And The door opening and closing device of the microwave oven, comprising a locking portion installed on the main body so as to be engaged or released with the latch by the rotation of the latch.