KR200160255Y1 - Tray rotation supporting apparatus in microwave oven - Google Patents

Abstract

The present invention relates to a tray rotating support device for a microwave oven, and an object thereof is to improve a structure of a roller guide rotatably supporting a tray to reduce the manufacturing cost thereof and to reduce a motor load.

Microwave tray support device according to the present invention is provided in the radially extending from the disc-shaped body 61 and provided with a support width 62 that the roller 63 is axially coupled to the distal end to narrow the width to the distal end and injection The space part 62c is formed in the longitudinal direction so that the weight can be reduced and the weight is reduced at the time of molding, and a pair of the first support part 62a and the second support part 62b having a constant thickness t are formed. Therefore, the raw material is reduced by the volume occupied by the space portion 62c during injection molding of the roller guide 60 made of expensive heat resistant resin, thereby reducing the overall manufacturing cost.

There is an advantage of being reduced, and by reducing the weight of the roller guide 60 itself, the shaft load received by the motor 56 is also reduced, thereby improving the overall reliability of the microwave oven.

Description

Microwave Tray Support

The present invention relates to a tray rotation support apparatus for a microwave oven for cooking food using a magnetron, and more particularly, to a tray rotation support apparatus for a microwave oven for rotatably supporting a tray so that cooking is performed uniformly.

In general, a microwave oven cooks food by friction heat between molecules by radiating a high frequency of 2450 MHz in a magnetron into a cooking chamber and repeatedly converting a molecular arrangement of moisture contained in a cooked product.

The microwave oven having such a function is provided such that a cooking chamber having an open surface and an electrical equipment compartment in which the electrical equipment is mounted are partitioned inside the main body forming the exterior, and the door is hinged to open and close the open surface of the cooking chamber.

The electronics compartment is equipped with a magnetron that generates high frequency radiation to the cooking chamber, a high pressure transformer for applying a high voltage thereto, a cooling fan for cooling the magnetron and a high voltage transformer, and the like, and a control unit is installed at the front side of the electrical equipment compartment.

And the cooking chamber is provided with a tray on which the workpiece is mounted, which is configured in a turntable manner through the roller guide so that cooking is uniformly irradiated with a high frequency of the workpiece.

Roller guides for supporting trays in a turntable manner are disclosed in JP 95-12149 (95.5.17).

As shown in FIG. 1 and FIG. 2, the roller guide 20 is configured to be driven by the motor 40 to rotate the tray 10.

First, the tray 10 has a smooth surface of a predetermined thickness and is formed with a protruding rod 11 protruding downward from the bottom center.

In addition, the roller guide 20 has a supporting portion 22 protruded in the body in three directions so as to support the tray 10 from the lower portion, and rollers 23 rolling on the front end of the supporting portion 22 are provided. In addition, an insertion groove 21 is provided on the upper surface of the body of the roller guide 20 so that the protruding rod 11 is inserted therein, and a boss portion 30 having a shaft hole 31 drilled downward is formed at the lower portion of the body. It is. The roller guide 20 is driven by the motor 40, the motor 40 is preferably configured on the bottom of the bottom surface of the cooking chamber so that the shaft 41 protrudes upward.

Therefore, when the motor 40 is driven while the roller guide 20 is coupled to the tip of the shaft 41 through the shaft hole 31 and the tray 10 is placed on the upper portion of the shaft 41, the tray 10 is a roller guide ( Rotate with 20). At this time, the roller 23 provided at the tip of the support 22 also rolls while contacting the bottom of the cooking chamber so that the tray 10 rotates.

As such, the roller guide 20 having the support 22 branched in three directions is injection molded from an expensive heat resistant resin, and the support 22 having the roller 23 axially coupled to the front end thereof is illustrated in FIG. 2. It is formed to have more thickness and width than necessary.

As a result, a lot of expensive materials are required during injection molding of the roller guide 20, thereby causing a problem in that the manufacturing cost is increased. In addition, since the roller guide 20 also has a considerable self weight, a large shaft load is applied to the tray 10 and the motor 40 for rotating the roller guide 20 so that the rotational movement of the roller guide 20 can be smoothly performed. There is a problem that is not made.

The present invention is to solve this problem, the object of the present invention is to improve the structure of the raw material required to reduce the injection molding of the roller guide, to reduce the manufacturing cost of the roller guide shaft load of the motor to rotate the roller guide It is to provide a tray rotating support device of the microwave oven can reduce the.

1 and 2 are cross-sectional views and plan views of the roller guide disclosed in Korean Utility Model Model No. 95-12149.

3 is a cross-sectional view showing the internal structure of the microwave oven to which the present invention is applied.

4 is a perspective view showing a roller guide according to the present invention.

<Description of the symbols for the main parts of the drawings>

60 ‥ Roller Guide 61 ‥ Body

61a ‥ boss 62 ‥ support

62a ‥ first support 62b ‥ second support

62c ‥ space 62d ‥ reinforcement rib

63 ‥ Roller

The present invention for achieving this object, the main body is provided with a cooking chamber that is irradiated with a high frequency; A tray provided in the cooking chamber and on which a cooked product is placed; The boss, which is inserted into the rotary shaft of the motor to rotate the tray in a turntable manner at the lower part of the tray, is radially injection-molded to form a disc-shaped body provided at the bottom of the center and 120 degrees from its outer circumferential surface. In the microwave oven having a roller guide including a support that the roller roller is axially coupled while rolling; The support is; A pair of first and second support parts and a first support part having a predetermined thickness are formed in a longitudinal direction, and the width part is provided to be narrower toward the tip part, and the upper and lower parts are formed in the longitudinal direction to reduce the material during injection molding and at the same time light weight. And at least two reinforcing ribs injection-molded in a semi-cylindrical shape on the corresponding inner surfaces of the first support and the second support to reinforce the rigidity of the support and the second support.

Hereinafter, one preferred embodiment according to the present invention will be described in detail with reference to the accompanying drawings. Figure 3 shows the internal structure of the microwave oven to which the present invention is applied, Figure 4 is a perspective view showing a roller guide according to the present invention.

As shown in FIG. 3, the cooking chamber 51 and the electrical equipment compartment 52 are partitioned inside the main body 50 forming the external shape, and the high-frequency radiation is radiated to the cooking chamber 51 in the electrical equipment compartment 52. A plurality of electrical appliances such as a magnetron 53 and a high voltage transformer 54 are installed.

The cooking chamber 51 is provided with a disk-shaped tray 55 on which the workpiece is placed, which is rotated in a turntable manner through the motor 56 and the roller guide 60 so that the workpiece is irradiated with high frequency uniformly.

The motor 56 is mounted on the bottom of the bottom of the cooking chamber 51 so that the rotation shaft 57 protrudes upward, and the roller guide 60 is fitted to the front end of the rotation shaft 57 of the motor 56 to be rotated. The tray 55 is rotatably supported.

In order to smoothly rotate the tray 55, the roller guide 60 is provided with a roller 63 which moves in contact with the bottom surface of the cooking chamber 51 and the bottom surface of the tray 55. The detailed structure thereof is as follows. same.

As shown in FIG. 4, the roller guide 60 extends at equal intervals from the outer circumferences of the disk-shaped body 61 and the body 61 in which the boss 61a is formed so as to be fitted into the rotary shaft 57 at the bottom of the central portion. And three support bodies 62, which are injection molded into a trivet shape through a heat resistant resin.

The support 62 is provided in the radial direction at an interval of 120 degrees from the outer circumference of the body 61, the roller 63 is axially coupled to the rolling motion while contacting the bottom surface of the cooking chamber 51 at the tip of the support 62 It is.

Each of the supports 62 is provided with a narrower width toward the tip, and reduces the raw materials during injection molding, and at the same time forms a space portion 62c having the upper and lower portions open in the longitudinal direction so as to have a light weight, and has a predetermined thickness. and a pair of first support portion 62a and second support portion 62b having t ". Therefore, the roller guide 60 is injection-molded with PPS (poly-phenylene-sulfide) material, which is a kind of expensive heat-resistant resin, and the space part 62c between the first support part 62a and the second support part 62b during molding. By reducing the volume of raw materials, the overall manufacturing cost is reduced as well as its own weight.

On the other hand, in order to reinforce the rigidity of the first support portion 62a and the second support portion 62b having a thickness “t”, the corresponding inner surfaces of the first support portion 62a and the second support portion 62b are generally semi-cylindrical. Two injection-molded reinforcing ribs 62d are each constructed.

Next will be described the microwave operation and effect according to the present invention configured as described above.

First, when the tray 55 containing the workpiece is placed on the upper portion of the roller guide 60 coupled through the rotation shaft 57 and the boss 61a of the motor 56, the lower surface of the tray 55 is the roller guide 60. The upper outer circumferential surface of the roller 63 provided at the tip of the support 62 comes into contact with the upper outer peripheral surface.

Then, the door (not shown) is closed and a control unit (not shown) is operated to perform the cooking stroke. In the magnetron 53, the high frequency is radiated to the cooking chamber 51, and the motor 56 is driven to roller guide 60. ) Rotates. At this time, the roller 63 provided at the tip of the support 62 has a rolling motion while the upper outer circumferential surface is in contact with the bottom surface of the tray 55 and the lower outer circumferential surface is in contact with the bottom surface of the cooking chamber 51. The food is uniformly irradiated with high frequency, and even cooking is performed.

As such, the support 62 of the roller guide 60 which is injection-molded with a heat resistant resin to rotatably support the tray 55 has a space portion in the longitudinal direction between the first support portion 62a and the second support portion 62b. Since 62c is formed and a plurality of reinforcing ribs 62d having a semi-cylindrical shape are formed, the raw material consumption is reduced by the volume occupied by the space 62c, thereby reducing the manufacturing cost. In addition, due to the reduction in the weight of the roller guide 60 itself, the shaft load received by the motor 56 is also reduced, so that the driving thereof is more smoothly performed.

As described above in detail, the tray rotation support apparatus of the microwave oven according to the present invention is provided in the radially extending from the disc-shaped body and provided with a support that is roller-axially coupled to the distal end toward the distal end, and the injection molding The space is formed in the longitudinal direction to reduce the material weight and light weight, and consists of a pair of first and second support parts having a predetermined thickness. Therefore, when the injection molding of roller guides made of expensive heat-resistant resins, raw materials are reduced by the volume occupied by the space part, and the overall manufacturing cost is reduced, and the shaft load received by the motor is also reduced due to the reduction of the weight of the roller guides. There is an advantage that the reliability of the is improved.

Claims (1)

A main body 50 provided with a cooking chamber 51 irradiated with high frequency; A tray 55 provided in the cooking chamber 51 and on which a cooking object is placed; A disk-shaped body 61 having a boss 61a fitted to and coupled to the rotary shaft 57 of the motor 56 so as to rotate the tray 55 in a turntable manner in the lower portion of the tray 55 and a lower portion thereof. The roller guide 60 is radially injection-molded to form an interval of 120 degrees from the outer circumferential surface and includes a support 62 on which a roller 63 is rolled in contact with the bottom surface of the cooking chamber 51 while being axially coupled. Microwave oven; The support 62 is; A pair of first support parts having a width “t” formed in a longitudinal direction and having a width 62c provided with a narrower width toward the tip and having a lower weight at the same time of injection molding to reduce the material and light weight 62a and the second support 62b, generally on the corresponding inner surfaces of the first support 62a and the second support 62b to reinforce the rigidity of the first support 62a and the second support 62b. A tray rotating support device for a microwave oven, characterized in that it comprises two or more reinforcing ribs (62d) injection molded into a semi-cylindrical shape.