KR100270864B1 - Dish loading device for microwaveoven - Google Patents

Abstract

PURPOSE: A rotation tray driving device for a microwave oven is provided to evenly radiate microwaves of a magnetron to food by moving the rotation tray vertically and rotating the rotation tray asymmetrically by connecting the rotation tray with a driving shaft of a driving part with a predetermined distance from the center of the rotation tray. CONSTITUTION: A rotation tray driving device for a microwave oven includes a rotation tray to put food, a driving part having a driving shaft(20a) coupled with the rotation tray, a rotation driving part(30) having a first motor(31) coupled with the driving shaft via a power transmission element, and a lifting driving part(40) having a lifting element coupled with the driving shaft, a cam gear(43) liftingly coupled with the lifting element, a third gear(42) engaged with the cam gear and a second motor(41) axially coupled with the third gear.

Description

Driving device for rotating dish of microwave oven

The present invention relates to a driving device for a rotating dish of a microwave oven, and more particularly, to a driving device for rotating and lifting a rotating dish of a cooking chamber in which food is placed.

In general, a microwave oven is a home cooking appliance that cooks food using microwaves emitted from a magnetron to which a high voltage is applied. In FIG. 1, such a microwave oven is illustrated.

According to FIG. 1, such a microwave oven is composed of a cabinet 1, a cooking chamber 2, a rotary plate assembly 3 and a door 4.

A magnetron (not shown) is mounted inside the cabinet 1, and the cooking chamber 2 is partitioned by a separate partition inside the cabinet 1.

In addition, a door 4 for selectively opening and closing the open front surface of the cooking chamber 2 is rotatably installed at one side of the cabinet 1.

2 and 3, the rotating plate 3 is composed of a dish body 5 and a motor 10, the dish body 5 is a motor shaft (10) of the motor (10). It is connected with the motor 10 by the coupling 6 couple | bonded with 10a).

In more detail, three locking protrusions 5a are formed at 120 ° on the bottom surface of the rotating plate 5, and the locking protrusions 5a are respectively sandwiched between the locking protrusions 5a on the upper surface of the coupling 6. Three locking projections 6a for transmitting the rotational force of the motor 10 to the rotary plate 5 are also formed at 120 °.

Between the rotary plate 5 and the bottom surface 2a of the cooking chamber 2, the rotary plate 5 is configured to stably support rotation of the cooking plate 2 with respect to the bottom surface 2a of the cooking chamber 2. A roller 7b is interposed, and the plurality of rollers 7b are rotatably coupled to the annular roller support 7a.

The plurality of rollers 7b are guided by their two rows of roller guides 5b and 5c protruding from the bottom of the rotary plate 5.

In order to cook food using a conventional microwave oven configured as described above, a container containing food is placed on the rotary plate 5 of the cooking chamber 2, the door 4 is closed, and then the microwave oven is operated. Microwaves are emitted from a magnetron installed inside the cabinet 1.

At the same time, the motor 10 installed in the lower part of the cooking chamber 2 is operated so that the coupling 6 coupled to the motor shaft 10a of the motor 10 is rotated, thus engaging the coupling 6. The food container mounted on the rotating dish 5 is rotated, and the microwaves emitted from the magnetron are irradiated evenly over the whole food, without being concentrated on the specific part of the food.

However, according to the conventional microwave oven configured as described above, since the rotation plate 5 is rotated in a state in which the center thereof becomes the rotation axis and is located in line with the motor shaft 10a of the motor 10, it is constant in the cooking chamber. Microwaves irradiated in the direction is insufficient to evenly irradiate the food in the container, there is still a difference in the degree of cooking in and out of the food, there is a problem such that the reliability of the product is lowered.

Therefore, the technical problem to be achieved by the present invention, that is, an object of the present invention is to solve the above problems occurring in a conventional rotary dish of a microwave oven, the microwave is evenly irradiated to food in the food container placed in the cooking chamber. It is to provide a rotary dish of the microwave oven to allow food to be cooked uniformly.

1 is a perspective view showing a typical microwave oven.

Figure 2 is a cross-sectional view showing a coupling state of a conventional rotary dish for microwave oven.

Figure 3 is an exploded perspective view of a conventional microwave rotating plate.

Figure 4 is a cross-sectional view showing a coupling state of the rotary plate of the microwave oven drive unit according to the present invention.

5 is an exploded perspective view of the rotating plate and the driving unit of the microwave oven according to the present invention.

Figure 6 is an exploded perspective view of a driving plate for a rotary dish of the microwave oven according to the present invention.

Figure 7 is a cross-sectional view of the drive unit for a rotary dish of the microwave oven according to the present invention.

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

6; Coupling 15; Rotating plate

15a; Jamming 15b, 15c; Roller Guide

17a; Roller support 17b; roller

20; Driver 20a; driving axle

20b; Keyway 21; Mounting Bracket

30; Rotary drive part 31; 1st motor

31a; Motor shaft 32; First gear

33; Second gear 33a; hall

33b; Ball groove 34; ball

35; Washer 40; Lift driving part

41; Second motor 41a; Motor shaft

42; Third gear 43; Cam gear

43a; Gear mount 43b; Through hole

43c; Guide groove 44; Body

44a; Guide protrusion 45; Guide member

45a; Longevity

In order to achieve the above object, a driving device for a rotary dish of the present invention includes a rotating dish in which food is placed; A drive shaft coupled with the rotation plate; A rotary drive unit having a first motor coupled to the drive shaft via a power transmission means; And a lift driver having a lift member coupled to the drive shaft, a cam gear coupled to the lift member to be liftable, a third gear meshed with the cam gear, and a second motor coupled to the third gear. Characterized in that it comprises a.

According to the driving device for a rotary plate of the microwave oven according to the present invention, since the rotating plate is moved up and down and asymmetrically rotated by the elevating drive unit and the rotating drive unit installed on the bottom of the cooking chamber, the whole food placed on the rotating plate The microwaves can be irradiated more evenly, and the food can be cooked more uniformly.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 4 is a cross-sectional view of the rotary plate of the microwave oven and the driving unit according to the present invention, Figure 5 is an exploded perspective view of the rotating plate and the driving unit of the microwave oven according to the present invention.

4 and 5, the driving device for a rotary plate of the microwave oven according to the present invention includes a rotary plate 15 and the drive unit 20. The rotating plate 15 is connected to the driving unit 20 by a coupling 6 which is splined to the driving shaft 20a of the driving unit 20.

At a point spaced a predetermined distance from the center of the bottom surface of the rotary plate 15, three locking projections (15a) are formed at an interval of 120 degrees around this point, the upper surface of the coupling (6) the locking projections Three locking projections 6a are also formed at intervals of 120 ° to fit between the respective portions 15a and to transfer the driving force of the drive portion 20 to the rotary plate 15.

Between the rotating plate 15 and the bottom surface 2a of the cooking chamber 2, a plurality of rollers 7b for stably supporting the rotation of the cooking plate bottom surface 2a of the rotating plate 15. It is also preferred that the plurality of rollers 7b are rotatably coupled to the annular roller support 7a.

The plurality of rollers 7b rotate while being guided by two rows of roller guides 15b and 15c protruding from the lower surface of the rotary plate 15.

6 is an exploded perspective view of a drive unit installed on the bottom surface 2a of the cooking chamber 2 and rotating the rotating plate 15 while moving the rotating plate 15.

As shown in FIGS. 6 and 7, the driving unit 20 has a large rotation driving unit 30 for rotating the rotating plate 15 and the rotating plate 15 in conjunction with the rotating driving unit 30. It is made up and down driving portion 40 for moving up and down. Both the rotation driving unit 30 and the lifting driving unit 40 are supported by the mounting bracket 21.

The rotary drive unit 30 has a first motor 31 for generating a rotational force and a power transmission means coupled to the first motor 31, the power transmission means is a drive shaft 20a and the shaft of the rotation plate The second gear 33 is engaged, and the first gear 32 meshes with the second gear 33.

On the other hand, in the circumference of the hole 33a of the second gear 33, a ball groove 33b into which the ball 34 is rotatably inserted is formed, and the circumference of the hole 33a of the second gear 33 is formed. It is preferable that a washer 35 is inserted / fixed into the ball 34 to prevent the ball 34 from being separated.

In addition, the drive shaft (20a) is formed with a key groove (20b) for guiding the shanghaidong of the ball 34 in the longitudinal direction.

The elevating driving unit 40 includes a second motor 41 generating a rotational force, a third gear 42 coupled to the motor shaft 41a of the second motor 41, and the third gear 42. And a cam gear 43 engaged with the cam gear 43, and a lift member coupled to the cam gear 43 in a liftable manner.

The elevating member includes a guide body 44 rotatably coupled to the drive shaft 20a of the drive unit 20, and a guide protrusion 44a formed on the guide body 44. The guide body 44 is coupled to the guide member 45 in which the long hole 45a is formed to be movable up and down. The long hole 45a is formed in the circumference of the guide member 45 at intervals of 180 ° and in the longitudinal direction.

The cam gear 43 has a cylindrical shape in which a through hole 43b is formed at the center thereof, and a gear tooth 43a is formed at an outer side thereof. A guide groove 43c is formed at an inner wall of the through hole 43b. It is.

On the other hand, the guide protrusion (44a) of the guide body 44 is fitted into the guide groove (43c), the guide protrusion (44a) is formed along the guide groove (43c) as the cam gear 43 rotates. Will move down.

Hereinafter, the operation of the rotating plate driving apparatus of the microwave oven according to an embodiment of the present invention configured as described above will be described in detail with reference to FIG.

The rotation of the rotating plate of the microwave oven according to the present invention, when the power is applied to the microwave oven is driven so that the first gear 32 is connected to the motor shaft 31a when the first motor 31 is driven. The second gear 33 meshed with the first gear 32 is rotated.

In addition, when the second gear 33 rotates, the drive shaft (B) by the ball 34 inserted between the ball groove 33a of the second gear 33 and the key groove 20b of the drive shaft 20a. 20a) does not idle and rotates together with the second gear 33.

Accordingly, the rotary plate 15 coupled to the coupling 6 which is splined to the drive shaft 20a rotates.

In addition, in the shanghai-dong which occurs simultaneously with the rotational movement of the rotary plate 15, the second gear 41 is driven simultaneously with the driving of the first motor 31, and the third gear ( 42 rotates, and the cam gear 43 meshed with the third gear 42 and the gear teeth 43a rotates.

At the same time, the guide protrusion 44a of the guide body 44 which is installed on the guide member 45 so as to be movable up and down is formed in the inner circumferential surface of the guide groove 43c as the cam gear 43 rotates. Will move up and down.

Therefore, the drive shaft 20a rotatably coupled to the guide body 44 repeats the up and down movement, and the rotary plate 15 is splined by the coupling 6 coupled to the drive shaft 20a. Repeated up and down movement.

In addition, since the rotation plate 15 is coupled to the drive shaft 20a at a point spaced from the center thereof, the rotation plate 15 is asymmetrically rotated while moving up and down.

Therefore, since the food container placed in the rotary dish 15 is asymmetrically rotated at the same time as it moves up and down, microwaves are evenly irradiated to the food in the container, thereby improving cooking performance of the microwave oven.

As described above, according to the rotating plate of the microwave oven according to the present invention, since the rotating plate is connected to the drive shaft of the drive unit at a point spaced from the center thereof, the food placed on the rotating plate is asymmetrically rotated while moving the magnetron Microwaves emitted from are evenly distributed throughout the food.

Therefore, it is possible to prevent the microwaves from being concentrated on only a specific portion of the food in the food container which is placed and rotated in the dish main body, and can greatly improve the cooking performance of the microwave oven.

Although specific embodiments of the present invention have been illustrated and described above, the present invention is not limited to the above-described embodiments, and the technology to which the present invention pertains without departing from the gist of the present invention as claimed in the claims. Various modifications can be made by those skilled in the art, and such changes are within the scope of the claims.

Claims (4)

Rotating dish where food is placed; A drive shaft coupled with the rotation plate; A rotary drive unit having a first motor coupled to the drive shaft via a power transmission means; And A lift driver including a lifting member coupled to the drive shaft, a cam gear coupled to the lifting member so as to lift up and down, a third gear engaged with the cam gear, and a second motor coupled to the third gear; Rotating plate driving device of the microwave, characterized in that it comprises a. The rotation of the microwave oven according to claim 1, wherein the power transmission means includes a first gear coupled to the first motor, and a second gear meshed with the first gear and arranged on the drive shaft. Drive for dish. The microwave oven of claim 1, wherein a guide protrusion is formed on an outer circumferential surface of the elevating member, and the cam gear is formed with a guide groove having a predetermined amplitude along an inner circumferential wall for shape coupling with the guide protrusion. Drive for dish. Rotating dish where food is placed; A driving shaft having one end coupled to the rotary plate and a lifting member coupled to an outer circumferential surface thereof; A first motor coupled to the drive shaft via a power transmission means; And A cam gear fixed relative to the drive shaft and coupled to a lifting member having a predetermined amplitude formed along an inner circumferential wall thereof; Rotating dish driving device characterized in that it comprises a.

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