KR100646894B1 - A Structure of Hinge assembly for Microwave oven - Google Patents

Abstract

The present invention relates to a hinge assembly of a microwave oven, and more particularly, an upper hinge 210 hinged to fix an upper end of a door installed in front of a cavity into which food is introduced; A lower hinge 230 hinged to fix the lower end of the door; It is installed on the rear surface of the front plate 100, characterized in that it comprises a bending preventing rib 250 for connecting between the upper hinge 210 and the lower hinge 230. In addition, the upper hinge 210, the lower hinge 230 and the bending prevention ribs 250 are integrally formed. In this case, even if a load of the door is applied to the upper hinge 210 and the lower hinge 230, the upper hinge 210 and the lower hinge 230 are prevented from bending, as well as deformation of the front plate 100. Is prevented.

Microwave Oven, Hinges, Anti-Bending Ribs

Description

A structure of hinge assembly for microwave oven

1 is a perspective view showing the configuration of a typical microwave oven.

Figure 2 is a partial perspective view showing the rear upper side of the microwave oven front plate in a state where the hinge assembly according to the prior art is installed.

Figure 3 is a partial perspective view showing the rear upper side of the microwave oven front plate of the hinge assembly according to the present invention.

Figure 4 is a perspective view of the hinge assembly according to the present invention.

Explanation of symbols on the main parts of the drawings

100: front plate 110: hinge hole

200: hinge assembly 210: upper hinge

211: upper fixing hole 230: lower hinge

231: lower fixing hole 250: bending prevention rib

270: upper strength reinforcement rib 270 ': lower strength reinforcement rib

The present invention relates to a microwave oven, and more particularly, to a structure of a hinge assembly in which an upper hinge and a lower hinge integrally fix an upper side and a lower side of a door to a front surface of the microwave oven.

2. Description of the Related Art In general, a microwave oven is a device for cooking food by generating microwave waves in a magnetron by supplying electric current, and irradiating the microwaves with heat such as food.

Such a microwave oven is largely divided into a home microwave oven and a commercial microwave oven.

In particular, commercial microwave ovens are mainly used in convenience stores, which are frequently used, or in restaurants that require food to be cooked in a short time, and require a relatively high output compared to household microwave ovens. Commercial microwave ovens are equipped with multiple or large magnetrons to produce such high output.

Hereinafter, the configuration of a commercial microwave oven as described above (hereinafter referred to as a microwave oven) will be described in more detail with reference to the accompanying drawings.

1 is a perspective view showing the configuration of a general microwave oven, Figure 2 is a partial perspective view showing the back of the microwave oven front plate in a state in which the hinge assembly according to the prior art is installed.

As shown in the figure, the microwave oven includes an outer case and a cavity 20 that form an exterior, an electric compartment 30 formed in a right side of the cavity 20, and the cavity 20. It is configured to include a door 40 installed in the front of the.

The outer case forms the appearance of the microwave oven and at the same time serves to protect the cavity 20 installed therein. Therefore, the outer case is generally made of an iron plate having a predetermined strength.

The outer case includes an upper plate (Upper Plate 11) that covers the upper surface and both sides of the cavity 20 at the same time, a base plate (Base Plate 13) to protect the lower surface, the front to form the front of the cavity 20 Plate (Front Plate 15), and the back plate (Back Plate 17) to protect the back of the cavity (20).

And a fastening hole (11a) for fixing the stainless steel cover to be described below is formed in the front upper portion of the front plate (11).

The cavity 20 is a space in which food, such as food, is cooked, and is composed of a substantially rectangular box opened forward. That is, food is fed through the opened front, and cooked food is taken out.

A predetermined space is formed in the right side of the cavity 20 as described above, and this space becomes the electrical equipment room 30 in which electrical components are installed.

In the electric compartment 30, a plurality of electric components such as a transformer 31, a magnetron 33, a blower fan 35, and a capacitor 37 are installed. In addition, a barrier 39 is provided inside the electric chamber 30, that is, between the transformer 31 and the blower fan 35. The transformer 31, the blower fan 35, the capacitor 37, and the barrier 39 are fixed to the upper surface of the subplate S, and the subplate S is removed from the upper surface of the base plate 13. It is installed at a predetermined interval.

The above-mentioned plurality of electric components, in particular, the transformer 31 and the magnetron 33 serve to generate microwave waves that are injected into the cavity 20, in which the electric components generate heat at high temperature. Done. Therefore, the temperature of the electrical equipment room 30 increases while cooking food.

In order to cool the electric chamber 30 heated as described above, the outside air must be sucked, which is performed by the blower fan 35.

The blower fan 35 is provided on an upper surface of the subplate S so that the blower fan 35 is separated from the upper surface of the base plate 13 by a predetermined height. And when the blowing fan (not shown) inside the blower fan 35 is rotated, the air below is guided by the blower fan 35 and introduced into the electrical equipment chamber 30, by the air introduced in this way The electric compartment 30 is cooled.

Meanwhile, as shown in FIG. 2, a hinge hole 15a is formed in the upper side of the front surface of the front plate 15, and the hinge hole 15a is opened to the front surface of the front plate 15.

Meanwhile, a hinge plate 50 is fixed to an upper side of the rear surface of the front plate 15, and a hinge 55 protruding to the front surface of the front plate 15 through the hinge hole 15a. Is formed. And the hinge plate 50 is formed not only on the rear side of the front plate 15 but also on the rear side.

However, the hinge plate 50 as described above has the following problems.

First, the door 40 is installed at the front of the hinge 55 to be rotatable. When the door 40 is installed at the hinge 55, the load of the door 40 is directly transmitted to the hinge 55. .

Therefore, when the load of the door 40 continues, the hinge 55 is bent downward, so that the hinge plate 50 pushes the rear surface of the front plate 15 forward. In this case, not only the front plate 15 is bent by the hinge plate 50, but also leads to a problem in that the door is not closed and the microwave cannot be used.

Accordingly, an object of the present invention is to solve the problems in the prior art as described above, and to provide a hinge assembly in which an upper hinge and a lower hinge are integrally formed.

Another object of the present invention is to prevent the front plate from bending by the hinge.

Hinge assembly of the present invention for achieving the above object, the upper hinge hinged to fix the upper end of the door is installed in front of the cavity into which food is put; A lower hinge hingedly fixing the lower end of the door; An anti-bending rib installed at a rear surface of the front plate and connecting between the upper hinge and the lower hinge; At least one strength reinforcing rib protruding rearward on at least one side of the upper and lower sides of the anti-bending ribs and positioned on the same line as the hinge to be in close contact with the outer surface of the cavity to support the cavity.

The upper hinge, the lower hinge and the anti-bending ribs are preferably integrally formed, and the anti-bending ribs are more preferably in close contact with the rear surface of the front plate.

In addition, at least one side of the upper side and the lower side of the bending preventing ribs is preferably formed to further strengthen the strength ribs protruding rearward, the strength reinforcement ribs are preferably fixed close to the outer surface of the cavity.

The strength reinforcing rib is most preferably configured to include an upper strength reinforcing rib tightly fixed to the upper surface of the cavity, and a lower strength reinforcing rib tightly fixed to the lower surface of the cavity.

According to the hinge assembly of the present invention as described above, not only the hinge is not bent but also the front plate is prevented from being bent by the hinge.

Hereinafter, a preferred embodiment of the hinge assembly according to the present invention as described above will be described in detail with reference to the accompanying drawings.

3 is a partial perspective view showing the rear surface of the microwave oven front plate in a state where the hinge assembly according to the present invention is installed, and FIG. 4 is a perspective view of the hinge assembly according to the present invention.

First, the microwave oven is composed of an outer case forming an exterior, a cavity into which food to be cooked is put, and an electrical equipment room in which a plurality of electrical components for controlling the cavity are installed. The front of the cavity is provided with a door for selectively opening and closing the space of the cavity, the door is selectively shielded by the hinge assembly is installed on the back side of the front plate constituting the outer case.

3 to 4, the hinge assembly 200 is provided in close contact with the upper side of the front plate 100.

First, the front plate 100 is installed in front of the cavity to form the front of the cavity, it is generally made of an iron plate having a predetermined strength. And hinge holes 110 are formed in the upper and lower sides of the front plate 100 such that the upper hinge and the lower hinge, which will be described below, protrude toward the front plate 100. Therefore, when the hinge assembly to be described below is installed on the rear surface of the front plate 100, the upper hinge and the lower hinge protrudes forward through the hinge hole (110).

The hinge assembly 200 includes an upper hinge 210, a lower hinge 230, and a bending preventing rib 250.

The upper hinge 210 is formed above the hinge assembly 200, and protrudes in the front, that is, the direction in which the door is installed. And it consists of a curved state of approximately 'ㄱ'. The upper fixing hole 211 is formed in the upper hinge 210. In addition, although not shown, an upper hinge protrusion of the door is inserted into the upper fixing hole 211, and the door is rotated based on the hinge protrusion.

The lower hinge 230 is formed below the hinge assembly 200 and has the same structure as the upper hinge 210. And the lower hinge 230 is a lower hinge protrusion (not shown) of the door is inserted.

The upper hinge 210 and the lower hinge 230 as described above are connected to each other by the bending prevention ribs 250.

The anti-bending ribs 250 are formed of long ribs, and function to substantially fix the upper hinge 210 and the lower hinge 230 to the rear surface of the front plate 100. The anti-bending ribs 250 are tightly fixed to the rear surface of the front plate 100 for the above function.

On the other hand, the upper hinge 210, the lower hinge 230, and the bending prevention ribs 250 as described above constitute the hinge assembly 200 by being integrally formed.

As such, the hinge assembly 200 is integrally configured to bend the hinges 210 and 230 by a load of a door fixed to the fixing holes 211 and 231 of the upper hinge 210 and the lower hinge 230 so as to be rotatable. To prevent.

In the hinge assembly 200 configured as described above, strength reinforcing ribs 270 and 270 'are further formed, and are divided into upper strength reinforcing ribs 270 and lower strength reinforcing ribs 270'.

The upper strength reinforcing rib 270 is formed on the upper side of the anti-bending ribs 250, that is, protrudes in the opposite direction of the upper hinge 210. The upper strength reinforcing rib 270 has a predetermined width, in order to improve the strength of the hinge assembly 200. The upper strength reinforcing rib 270 has a lower surface closely fixed to the upper surface of the cavity 20.

The lower strength reinforcing rib 270 ′ is formed at the lower side of the bending preventing rib 250 and protrudes in the opposite direction of the lower hinge 230. The lower strength reinforcing rib 270 'has the same shape as the upper strength reinforcing rib 270'. The lower strength reinforcing rib 270 ′ has an upper surface closely fixed to the lower surface of the cavity 20.

In addition, the hinge assembly 200 is made of an iron plate having a predetermined thickness. That is, the upper hinge 210 and the lower hinge 230 to bear the load of the door by having its own strength.

Looking at the formation of the hinge assembly 200 as described above are as follows.

First, a mold having a shape of the hinge assembly 200 is prepared, and then the mold is installed in a press. At this time, the mold is preferably composed of a pair, that is, the upper mold and the lower mold.

As such, when the iron plate having a predetermined thickness is inserted into the press in the state where the mold is installed, and then punched out, the hinge assembly having the hinges 210 and 230, the bending preventing ribs 250, and the strength reinforcing ribs 270 and 270 'as described above. 200 is produced.

However, the hinge assembly 200 may be made by casting. That is, when the molten metal solution is injected into the mold and then cooled, the hinge assembly 200 having the above-described configuration can be manufactured. In addition, it is obvious that the hinge assembly 200 may be manufactured by synthetic resin such as plastic, depending on the raw material injected into the mold.

Therefore, the hinge assembly 200 is preferably manufactured by punching iron plates, but it is obvious that the hinge assembly 200 may be made of more various materials for the convenience of design.

Looking at the hinge assembly 200 configured as described above is installed in the rear of the front plate 100 as follows.

First, the hinge holes 110 are formed in the upper and lower surfaces of the front plate 100, respectively. Thus, the hinge hole 110 is formed in the front plate 100 is preferably formed integrally in the process of punching the front plate. However, the hinge hole 110 may be perforated through a separate process after the front plate 100 is installed on the front of the cavity 20. Therefore, it is apparent that the hinge hole 110 may be formed in various ways for the convenience of design or the ease of the process.

The hinge assembly 200 is brought into close contact with the rear surface of the front plate 100. In this case, the upper hinge 210 protrudes toward the upper front of the front plate 100 through the hinge hole 110, and the lower hinge 230 also moves toward the lower front of the front plate 100 like the upper hinge 210. Will protrude. The bending preventing rib 250 is in close contact with the rear surface of the front plate 100.

Meanwhile, the upper strength reinforcing rib 270 is in close contact with the upper surface of the cavity 20, and the lower strength reinforcing rib 270 ′ is in close contact with the lower surface of the cavity 20.

Thereafter, when the upper and lower portions of the bending preventing ribs 250 and the strength reinforcing ribs 270 and 270 'are spot-welded to the rear surface of the front plate 100 or the upper and lower surfaces of the cavity 20, the hinge assembly 200 is firmly fixed. do.

However, the hinge assembly 200 may be fixed in addition to spot welding and fixing. For example, after the fastening holes are provided in the bending preventing ribs 250 and the strength reinforcing ribs 270 and 270 ', a method of fastening a screw or the like is also possible. In addition, after applying an adhesive or the like on the outer surface of the anti-bending ribs 250 and the strength reinforcing ribs (270, 270 '), the hinge assembly 200 may be fixed.

As described above, it can be seen that the present invention uses the hinge assembly in which the upper hinge and the lower hinge are integrally formed as the basic idea. Therefore, within the scope of the basic idea of the present invention, it will be apparent to those skilled in the art that more modifications are possible.

If the upper rib, the lower rib and the bending preventing rib are integrally formed as described above, the following effects are expected.

First, since the door is installed between the upper rib and the lower rib, even if a load is applied to the upper rib and the lower rib, there is an advantage that the upper rib and the lower rib do not bend.

In addition, since the upper rib, the lower rib, and the bending preventing rib are integrally formed, the hinge assembly is made simpler. In this case, the process of manufacturing the hinge assembly is simplified, and there is an advantage that the upper rib and the lower rib can be installed at the same time.

And the said bending prevention rib is closely attached to the back surface of a front plate, and curvature of a front plate is prevented. In this case, the door installed in front of the front plate can be normally opened and closed, as well as the advantage that the appearance of the microwave oven can maintain the state at the time of the first purchase.

Claims (6)

An upper hinge hingedly fixing an upper end of a door installed in front of a cavity into which food is introduced; A lower hinge hingedly fixing the lower end of the door; An anti-bending rib installed at a rear surface of the front plate and connecting between the upper hinge and the lower hinge; A hinge of a microwave oven including at least one strength reinforcing rib which protrudes rearward on at least one side of the upper and lower sides of the anti-bending ribs, is located on the same line as the hinge and is in close contact with the outer surface of the cavity to support the cavity. assembly. The hinge assembly of claim 1, wherein the upper hinge, the lower hinge, and the bending preventing rib are integrally formed. The hinge assembly of a microwave oven according to claim 1 or 2, wherein the bending preventing ribs are in close contact with the rear surface of the front plate. delete delete The hinge assembly of a microwave oven according to claim 1, wherein the strength reinforcing rib comprises an upper strength reinforcing rib tightly fixed to the upper surface of the cavity and a lower strength reinforcing rib tightly fixed to the lower surface of the cavity. .

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