KR200181603Y1 - Latch board for microwave oven - Google Patents

Abstract

The present invention relates to a latch board of a microwave oven.

The present invention provides a latch device for a microwave oven comprising a latch board having a pair of latch hooks installed on a door, and a latch board installed on a cabinet to lock the latch hooks and to detect an open / closed state of the door. With the board; A first fixing body which is molded out along the front end of the main board such that a pair of locking jaws locking the latch hook of the door is formed at an upper side and a lower side; A second fixing body which is molded out on the main board behind the upper locking jaw to form a pair of hooks for fixing the first safety switch; A third fixing body which is molded out on the main board below the upper locking jaw so that a pair of hooks for fixing the second safety switch are formed; A fourth fixing body which is molded out on the main board behind the lower locking jaw to form a pair of hooks for fixing a third safety switch; And a fifth fixing body which is molded out on the main board below the upper locking jaw so that a pair of hooks for fixing the fourth safety switch are formed.

Description

Latch board for microwave oven {Latch board for microwave oven}

The present invention relates to a latch apparatus of a microwave oven, and more particularly, to a latch board of a microwave oven in which a latch hook of a door is locked and safety switches are installed.

The microwave oven cooks food with frictional heat generated by molecular motion by irradiating the food with high frequency oscillated from the magnetron of the driving chamber while the food is placed in the cooking chamber.

As shown in FIG. 1, the microwave oven has a box-shaped cabinet 1 provided with a cooking chamber 2 and a driving chamber 3 therein, and a front surface of the cabinet 1 for opening and closing the cooking chamber 2. The door 4 is installed. And a tray 5 for placing food on the bottom of the cooking chamber (2) of the cabinet (1) is installed, the driving chamber (3) is a high-pressure magnetron (not shown) and a high-pressure supplying a high-current current to the magnetron Each transformer (not shown) is installed. In addition, on the front panel of the cabinet 1, various function selection buttons 6 for setting the operating time, cooking mode, etc. of the microwave are arranged.

On the other hand, the cabinet 1 and the door 4 are provided with a latch device 7 for keeping the door 4 closed. The latch device 7 securely locks the door 4 to the cabinet 1 to prevent the leakage of the high frequency generated in the cooking chamber 2, and a pair of hook latches 8 installed in the door 4 are provided. And a latch board 9 having a guide hole 9a and a locking step 9b. The latch board 9 is installed in the drive chamber 3 of the cabinet 1 and is injection molded using resin as a material. In addition, one side of the latch board 9 is provided with a series of safety switches for detecting the opening and closing state of the door (1).

On the other hand, such a latch board of the microwave oven has a disadvantage that is deformed over time, thereby causing a defect that causes a malfunction of the safety switch.

That is, a lot of heat is generated in the magnetron and the high-pressure transformer of the microwave oven, a problem that causes deformation such as bending, twisting or shrinkage of the resin latch board 9 installed in the drive chamber 3 by the heat. It became.

This problem was caused by a malfunction of the safety switches by changing the detection position of the safety switches installed on the latch board (9). If the microwave oven is operated while the safety switch malfunctions and the door is not closed, high frequency harmful to human body may leak from the microwave oven.

Accordingly, the present invention has been made to solve the above problems, the object of the present invention relates to a latch board of a microwave oven that is not deformed by heat generated in the magnetron and high-pressure transformer.

1 is an external view of a typical microwave oven,

Figure 2 is a perspective view showing a latch board of the microwave oven according to the present invention,

Figure 3 is a side view showing the installation state of the latch board of the microwave oven according to the present invention.

♣ Explanation of symbols for main part of drawing ♣

10: motherboard 20: first fixed body

21: engaging jaw 22: guide hole

30: second fixed body 40: third fixed body

50: fourth fixed body 60: fifth fixed body

32,44,52,62: hook

In order to achieve the above object, the present invention is a latch device of a microwave oven comprising a pair of latch hooks installed on a door, and latch boards installed on a cabinet to lock the latch hooks and safety switches for detecting an open / closed state of the door. In the, the main board made of metal; A first fixing body which is molded out along the front end of the main board such that a pair of locking jaws locking the latch hook of the door is formed at an upper side and a lower side; A second fixing body which is molded out on the main board behind the upper locking jaw to form a pair of hooks for fixing the first safety switch; A third fixing body which is molded out on the main board below the upper locking jaw so that a pair of hooks for fixing the second safety switch are formed; A fourth fixing body which is molded out on the main board behind the lower locking jaw to form a pair of hooks for fixing a third safety switch; And a fifth fixing body which is molded out on the main board below the upper locking jaw so that a pair of hooks for fixing the fourth safety switch are formed.

Hereinafter, a preferred embodiment of a latch board of a microwave oven according to the present invention will be described in detail with reference to the accompanying drawings (the same components will be described with the same reference numerals).

First, as shown in FIGS. 2 and 3, the latch board of the microwave oven of the present invention has a main board 10. The main board 10 is press-molded from a metal plate such as a metal plate, for example, an electrogalvanized steel sheet, to prevent deformation due to heat, and a plurality of reinforcement beads 12 are vertically formed at one side thereof. The main board 10 is vertically fixed to the drive chamber 3 of the cabinet 1 by fastening means.

In addition, the main body 10 is molded out of a resin material that can be assembled with a locking jaw and a safety switch for locking the latch hook 8 of the door 4.

That is, the main board 10 has a first fixing body 20 having a locking jaw 21 and a guide hole 22, and second, third, fourth and fifth fixing bodies having hooks 30 and 40 formed therein. , 50,60 are out molded. For reference, the insert molding is a concept opposite to insert molding, and refers to mold molding of a resin or the like separately on the outer surface of a metal or other material.

On the other hand, a pair of guide holes 22 are formed in the upper and lower portions of the first fixing body 20 which is molded out along the front end of the main board 10, and the bottom surface of the guide hole 22 is inclined backward. It extends to form a locking jaw (21). The locking jaw 21 is configured to engage the latch hook 8 of the door 4 inserted through the guide hole 22. In addition, support ribs 24 are formed on upper and lower portions of the first fixing body 20, and the supporting ribs 24 firmly support the first fixing body 20 to the main board 10.

The second fixing body 30 is out molded at the rear of the upper locking jaw 21, and the third fixing body 40 is out molding below the upper locking jaw 21. The second fixing body 30 has a pair of hooks 32 protruding at predetermined intervals, and between the hooks 32 there is a first safety switch 34 for detecting the opening and closing state of the door 4 Is installed. The first safety switch 34 is turned on / off by contacting one side of the latch hook 8 provided in the door 4.

In addition, an inclined portion 42 is formed in the third fixing body 40, and a pair of hooks 44 protrude from one side of the inclined portion 42 at predetermined intervals. Between the hooks 44, the second safety switch 45 for detecting the open / closed state of the door 4 is inclined. Here, the second safety switch 45 is a switch for detecting whether the door 4 is open, called a D.O.M switch. The second safety switch 45 is also in contact with one side of the latch hook 8 is turned on / off.

In addition, the fourth fixing body 50 and the fifth fixing body 60 are also externally molded at the rear and the lower portion of the lower locking jaw 21. A pair of hooks 52 protrude from the fourth fixing body 50 at predetermined intervals, and between the hooks 52, a third safety switch 54 for detecting an open / closed state of the door 4 is provided. Is installed. The third safety switch 54 is turned on / off by contacting one side of the latch hook 8 provided on the door 4.

In addition, a pair of hooks 62 are also protruded at predetermined intervals in the five molded body 60 formed at the rear of the lower locking jaw 21, and the fourth safety switch 64 is interposed between the hooks 62. Is installed. The fourth safety switch 64 is a switch for monitoring the operation of the first safety switch 34 and the third safety switch 54, and the first safety switch 34 and the third safety switch with the door 4 open. When the safety switch 54 operates, a short circuit is formed to open the fuse, thereby preventing the microwave oven from operating.

On the other hand, the latch board composed of this configuration is installed perpendicular to the drive chamber 3 of the cabinet (1). The latching jaw 21, which is installed at the upper and lower ends of the latch board, is inserted into the cabinet 1 along the guide hole 22 to lock the latch hook 8 inserted into the cabinet 1 to thereby close the door 4. Keep it. In addition, a series of safety switches installed on one side of the latch board accurately detects the open / closed state of the door 4 to facilitate the operation of the microwave oven.

Particularly, in the latch board of the present invention, the main board 10 is made of a metal material, and the main parts of the resin, such as each of the fixing bodies for fixing the locking jaw 21 and the safety switch, are molded out of the resin material. Since it is molded out on the motherboard 10 as a material, there is an advantage that it is not easily deformed by heat generated from the magnetron and the high-pressure transformer. In addition, since only the main part is molded out of the resin material, the shape of the product is simplified, and it can also be easily assembled in a narrow space.

On the other hand, the above embodiment is only to describe the preferred embodiment of the present invention, the scope of application of the present invention is not limited to such, and the present invention can be appropriately changed within the scope of the same idea. For example, the shape and structure of each component specifically shown in the embodiment of the present invention can be modified.

As described above, the latch board of the microwave oven according to the present invention is made of a main body made of metal and mold molded parts which are molded out of the main part of the main board, which is not easily deformed by heat.

In addition, since only the main parts such as the locking jaw and the hook are molded out of the main board on the resin material, the shape of the product is simplified, so that the main board can be easily assembled even in a narrow space.

Claims (3)

A latch apparatus for a microwave oven comprising a latch board having a pair of latch hooks installed on a door, and a safety switch mounted on a cabinet to lock the latch hooks and detecting an open / closed state of the door. A main board made of metal; A first fixing body made of a synthetic resin material which is molded out along the front end of the main board such that a pair of locking jaws locking the latch hook of the door is formed at an upper part and a lower part thereof; A second fixing body made of a synthetic resin material which is molded out on the main board behind the upper locking jaw to form a pair of hooks for fixing the first safety switch; A third fixing body made of a synthetic resin material which is molded out on the main board below the upper locking jaw to form a pair of hooks for fixing a second safety switch; A fourth fixing body made of a synthetic resin material which is molded out on the main board behind the lower locking jaw to form a pair of hooks for fixing a third safety switch; The latch board of the microwave oven, comprising: a fifth fixing body made of a synthetic resin that is molded out on the main board below the upper locking jaw to form a pair of hooks for fixing the fourth safety switch. The latch board of the microwave oven according to claim 1, wherein the main board is made of an electrogalvanized steel sheet. According to claim 1, The upper and lower portion of the first fixing body is formed with a guide hole for receiving the latch hook of the door, the bottom of the guide hole extending inclined to the rear to engage the locking hook to lock the latch hook Latch board of the microwave oven, characterized in that forming a.