KR100227081B1 - Apparatus for elevating and rotating the turntable of a microwave oven - Google Patents

Abstract

The present invention is a turntable lifting and rotating device of the microwave oven of the new structure which enables the vertical movement and rotational movement of the turntable in the cooking chamber at the same time with one small motor and the other operating simultaneously by the vertical gear rotated by the small motor The up and down cycle of the turntable is later than the rotation cycle by using the upshift cam gear and the rotating shaft gear of the shaft, and the angle between the lifting cam and the rotating cam of the integrated shanghai cam gear and the rotary shift shaft gear at the time of ascending. It is designed to be more than the jamming angle (minimized), so that unnecessary frictional force loss is minimized, and it is effective not only to cook the food on the turntable more evenly, but also to the turntable multi-rotator that can minimize the capacity of the driving motor. On the bottom of the cooking chamber of the microwave oven In the turntable lifting and rotating apparatus for rotating and vertically rotating food, upper and lower gears 15 and 16, which are simultaneously rotated by the motor 14 having a minimized capacity, are installed in one frame. The shankdong cam gear 12 and the rotary shift shaft gear 13 meshing with (15, 16) are installed on the other side, and the shank east cam gear 12 and the rotary shift shaft gear 13 are concentric. In the assembled state, the shaft 17 coupled to the turntable 20 is coupled to the body of the rotational shift shaft 13 and guide pin 18 is fitted through the inclined groove 21 inclined to be integrated. Microwave turntable lifting and rotating device.

Description

Turntable hoisting device for microwave oven

The present invention relates to a turntable lifting and rotating apparatus of a microwave oven, which enables the vertical movement and the rotational movement of the turntable in a cooking chamber at the same time as one small motor, and more specifically, by a vertical gear rotated by the small motor. The lifting cam and the rotating cam of the integrated shandong cam and the rotating shaft of the turntable are moved at the same time, while the vertical movement cycle of the turntable is later than that of the rotating shaft using the shankung cam cam and the rotating shaft of the other shaft that operate simultaneously. By setting the angle to be equal to or greater than the jamming angle to minimize unnecessary frictional force loss, the turntable lifting and lowering rotation is effective for not only cooking the food on the turntable more evenly, but also minimizing the capacity of the driving motor. Relates to a device.

Microwave ovens, which are a kind of cooking utensils, have been widely used as cookers of a method of resonating and heating water molecules contained in a food, using a high frequency electric field of microwaves, unlike a conventional conductive heating method.

However, in the case of a general microwave oven, it is very difficult to uniformly generate a high frequency electric field in the cooking chamber, and the ripening degree of the cooked food according to the position in the cooking chamber is different.

In order to compensate for this, in most microwave ovens, the food in the cooking chamber is rotated at a constant speed using a turntable, or in a more improved form, the food on the turntable is cooked evenly by rotating the table at the same time. Doing.

That is, Figure 6 is a cross-sectional view showing two representative of the conventional turntable lifting and rotating device, the turntable lifting and rotating device shown in Figure 6 (A) is a form in which the rotation and vertical movement is driven by a separate motor Bar, which can obtain a vertical motion by rotating the vertical motion (4) supporting the end of the shaft (2) connected to the turntable (1) with a vertical motor (not shown), the spline formed on the shaft (2) It is configured to obtain a rotational motion by rotating the motor for rotational motion (not shown) through the rotary gear (3).

However, the conventional turntable lifting and lowering apparatus configured and operated as described above performs the vertical movement and the rotary movement so that the shaft 2 under the turntable 1 is operated by the vertical movement cam 4 and the rotation gear 3. Independent control is possible by driving each motor as a separate motor, while the structure of the lifting and rotating apparatus becomes complicated and its size increases, resulting in a high manufacturing cost.

On the other hand, the turntable lifting and rotating apparatus shown in FIG. 6B shows a typical form for simultaneously obtaining the rotation and the up and down movement of the turntable 1 using one motor. That is, the guide pin 6 is fixed to the shaft 5 under the turntable 1 in the horizontal direction, and as the shaft 5 is rotated, the guide pin 6 is fixed to the frame. It is configured to move up and down along the upper curved surface of 8).

Since the spline formed on the shaft 5 is rotated by a motor (not shown) through the rotary gear 7, the spline is configured to simultaneously obtain the vertical motion and the rotary motion of the turntable 1.

Such a conventional turntable lifting and rotating device is provided with a vertical motion cam 8 and a rotating gear 7 on the shaft 5 of the guide pin 6, while its mechanism is simple and consumes a lot of energy. It caused the up and down movement more than necessary (once or once per wheel, etc.), the manufacturing cost was expensive as the required capacity of the motor increases.

In addition, in the conventional turntable lifting and rotating apparatus, as the rotational movement price and the vertical movement period coincide, a specific portion of the food on the turntable 1 passes only a specific height at a specific angle, and thus there is a limit to ripening the food evenly. there was.

The present invention invented a turntable lifting and rotating device having a new structure to solve the disadvantages of the conventional turntable lifting and rotating device as described above, and to reduce the required capacity of the motor even using only one motor, The shankdong cam gear of the other shaft and the rotatable shaft shaft are installed so that the up-and-down cycle of energy consumption is slower than the cycle of the rotary movement, and the cam of the shankdong cam gear and the rotary shift shaft gear during the ascending movement is minimized. It is an object of the present invention to provide a turntable lifting and rotating apparatus of a microwave oven capable of cooking food on a turntable even though it is compact and has low manufacturing cost by constructing a structure that prevents jamming from the surface.

1 is an exploded perspective view showing a turntable lifting and rotating device according to an embodiment of the present invention,

Figure 2 is an internal perspective view for explaining the operation of the turntable lifting and rotating device of the microwave oven of the present invention,

3 is a state in which the turntable lifting and rotating device of the electronic train of the present invention,

4 is a characteristic diagram of the movement of the Shanghai-dong cam gear and the rotary-shift shaft gear shown in FIG.

5 is a state in which the shanghai cam cam gear in the turntable lifting and rotating apparatus of the present invention in a different form,

6 is a cross-sectional view showing two representative of the conventional turntable lifting and rotating apparatus.

* Explanation of symbols for main parts of the drawings

11: Frame 12: Shanghai Dong Cam Gear

13: Rotation shift shaft gear 14: Motor

15,16: shanghai gear 17: shaft

18: guide pin

The turntable lifting and lowering apparatus of the present invention for achieving the above object is provided in the bottom of the cooking chamber of the microwave oven, the turntable lifting and rotating apparatus for rotating and vertical movement of the food on the turntable 20, the capacity in the frame 11 The upper and lower gears 15 and 16, which are rotated at the same time by the minimized motor 14, are installed on one axis, and the shank dong cam gear 12 and the rotary shift shaft gear meshed with the upper gears 15 and 16 correspond to each other. (13) is installed on the other shaft, the shaft 17 coupled with the turntable 20 is a rotary movement shaft gear (1) in the state in which the shankdong cam gear 12 and the rotary shift shaft gear (13) are assembled concentrically. It is characterized in that the guide pin 18 is integrated through the inclined groove 21 inclined to be coupled to the body of 13) to be integrated.

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

1 is an exploded perspective view showing a turntable lifting and lowering device according to an embodiment of the present invention, unlike the conventional turntable lifting and rotating device is a one of the minimum capacity in the frame 11 It is a turntable lifting and rotating device of a microwave oven of a new structure in which the up and down and rotational movements of the turntable 20 (see FIG. 3) can be simultaneously performed by the motor 14.

That is, vertical movement is performed by using the shank dong cam gear 12 and the rotational shift shaft gear 13 of the other axis operated simultaneously by the upper and lower gears 15 and 16 of the one axis rotated by the motor 14 having a minimized capacity. Since it is generated by the difference in the rotational speed of the two gears, while the vertical movement period of the turntable 20 later than the rotational movement period, the inclined groove 21 and the Shanghai-dong cam gear 12 of the body of the rotary shift shaft gear 13 The angle formed by the rising surface of the Shanghai East cam 25 of about 90 degrees, when the inclined groove 21 pushes the guide pin 18 along the rising surface of the Shanghai East cam 25 It is configured to minimize the capacity of the motor 14 by preventing the generation of frictional force due to jamming.

The frame 11 is fixed to the bottom of the microwave oven and penetrates the surface thereof so that one side of the shaft 17 comes out to the cooking chamber and is integrated with the turntable 20 as shown in FIG. 3.

The shaft 17 of the guide pin 18 integrated on the frame 11, the shank dong cam gear 12, the rotary shift shaft gear 13, the motor 14, and the upper and lower gears 15 and 16 are As shown in FIG. 3, the pillar 13 and the plurality of screws 24 and 24 'are installed to be stably fixed and supported.

The guide pin 18 is fastened to the shaft 17 of the frame 11 at a right angle, which means that the shank cam cam 12 and the rotary shift shaft gear 13 are assembled concentrically. 17 is coupled to the rotary shift shaft 13, the guide pin 18 is fitted through the inclined groove 21 to be integrated.

The shaft 17 of the guide pin 18 integrated in this way, the shanghai cam cam 12 of the shanghai cam 25, and the rotary shaft gear 13 of the inclined groove 21 are connected to the other axis of the frame 11. In the fixed state, the protective container 19 is coupled.

The shandong copper cam gear 12 is provided with a shandong copper cam 25 is formed with two projections 22 and the inclined surface descending to both sides.

Since the size of the shankdong cam gear 12 is larger than the size of the rotational shift shaft gear 13, the vertical movement period is later than the rotational movement period.

As described above, the shankdong cam gear 12 and the rotary shift shaft gear 13 to which the shaft 17 of the guide pin 18 is coupled on the frame 11 correspond to the upper and lower shafts 15 and 16 of one axis. The upper and lower gears 15 and 16 are interlocked and installed at the same time by the motor 14 having a power terminal, and the size of the upper gear 15 and 16 is smaller than that of the lower gear 16. 14) is coupled to the shaft.

The turntable lifting and rotating apparatus of the present invention configured as described above can freely adjust the vertical movement period by adjusting the gear ratio of the concentrically assembled Shanghai copper cam gear 12 and the rotary shift shaft gear 13, and FIG. As shown, the angle formed between the inclined groove 21 of the body of the rotary shift shaft 13 and the rising surface of the shanghai cam 25 of the shanghai cam cam 12 is formed at about 90 degrees. By preventing the generation of frictional force by jamming when the inclined groove 21 is the guide pin 18 along the rising surface of the shankdong cam 25, the shankdong cam gear 12 and the rotary shift shaft gear ( It is possible to minimize the capacity of the motor 14 to rotate the upper and lower gears 15 and 16 driving the 13 at a constant speed.

2 is an internal perspective view for explaining the operation of the turntable lifting and rotating device of the present invention, a state diagram in which the upper surface and the protective tube of the frame 11 are removed to better show the operating state of the turntable lifting and rotating device of the present invention.

The motor 14 on the frame 11 is driven by a power supply (not shown) so that the upper and lower gears 15 and 16 of one axis rotate at a constant speed, and are coupled to the shaft 17 of the guide pin 18 engaged with the shaft 14. Since the shankdong cam gear 12 and the rotary shift shaft gear 13 are also rotated, the guide pin 18 moves along the inclined groove 21 of the rotary shift shaft gear 13 and thus the slope of the shandong cam 25. Since the movement along the vertical movement of the turntable 20 and the rotation is made at the same time.

In some cases, unlike the inclined groove 21 of the rotary shift shaft 13 shown in FIG. 2, the groove of the body of the rotary shift shaft 13 'as shown in FIG. In the case where 26) is not inclined and is formed vertically, jamming phenomenon occurs in which the guide pin of the shaft snaps itself between the raised surface of the shandong copper cam and the groove 26 by the driving force as shown in FIG. 5 (B). .

Therefore, in the turntable lifting and lowering apparatus of the present invention, the inclined groove 21 of the rotary shift shaft gear 13 shown in FIG. By configuring the angle formed by the rising surface of the Shanghai-dong cam 25 of the moving cam gear 12 to about 90 degrees, the inclined groove 21 at the corresponding portion of the shaft 17 along the elevation of the Shanghai-dong cam 25. It is possible to prevent the occurrence of frictional force due to jamming when pushing the guide pin 18 of the).

On the other hand, when the ratio of the rotational speed of the rotary movement shaft gear 13 and the differential rotational speed of the rotary movement shaft gear 13 and the Shanghai moving cam gear 12 is 5 to 2 as shown in FIG. Likewise, since five rotational movement cycles include two up and down movement cycles, a specific portion of the food on the turntable 20 passes through various heights during rotation to cook the food evenly.

That is, one portion of the food does not pass only up and down positions fixed at a specific rotation angle, but passes through different up and down positions (for example, five locations), thereby having the effect of cooking the above food evenly.

As described above, according to the present invention, a turntable lifting and lowering apparatus for a microwave oven having a new structure which can achieve the same performance as a conventional turntable lifting and rotating apparatus using two motors while reducing manufacturing costs using only one small motor. Can provide.

By adopting such a turntable lifting and rotating apparatus of the present invention in various types of microwave ovens, it is possible to significantly improve the competitiveness of microwave ovens in the global market.

Claims (2)

In a microwave turntable lifting and rotating apparatus mounted on the bottom of a cooking chamber of a microwave oven for lifting and rotating food on a turntable, the gears 15 having different gear ratios are provided under the motor 14 provided between the upper and lower frames 11. 16 is coupled, the shanghai cam cam 12 of the shanghai cam (25) having an inclined surface 22 of about 90 degrees on the upper side is meshed with the upper gear 16, and at the same time spirally inclined vertically An inclined groove 21 is formed and the rotary shift shaft gear 13 inserted into the shanghai cam 25 is engaged with the upper and lower gears 15, and the upper side of the shaft 17 is coupled to the turntable (). The fixed guide pin 18 is passed through the inclined groove 21 of the rotary shift shaft 13 to guide the movement along the inclined groove 21 and the inclined surface 22 of the shandong cam. Turntable elevating device of the microwave oven. The turntable of the microwave oven according to claim 1, wherein the shank dong cam gear 12 is larger than the outer circumference of the rotating shift shaft gear 13 to be fitted so that the up and down movement period is later than the rotation movement period. Lifting rotator.

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