KR20090057676A - A roller and rotating apparatus comprising the same - Google Patents

Abstract

A roller and a rotating apparatus comprising the same are provided to prevent the interruption of a roller due to foreign material because foreign material of food is accumulated in a groove formed on the outer periphery. A roller comprises a contact surface(22) contacting with the bottom of a cooking chamber and a turntable, provided in the outer periphery; and a groove(23) into which foreign material is accumulated, whose outer periphery is recessed. The width of the groove is increased toward the outer periphery from the rotation center of the roller.

Description

A roller and a rotating apparatus comprising the same

The present invention relates to a microwave oven, and more particularly to a roller for supporting a tentable rotatably installed in the interior of the cooking chamber and a rotating apparatus for a microwave oven including the same.

Microwave ovens are home appliances that cook food using microwaves and / or heater heat. In general, a microwave oven is provided with a rotating device for rotating food or food containers containing food to heat food evenly.

Such a rotation apparatus is provided in a cooking chamber, and includes a turntable on which food or a cooking vessel is seated, a plurality of rollers supporting the turntable, a rotation ring to which the roller is fixed, and a driving motor for providing a driving force for rotation of the turntable. It includes. At this time, the roller is rotated in such a state that the outer circumferential surface is in contact with the bottom surface of the cooking chamber and the bottom surface of the turntable.

However, the following problems occur in the roller according to the prior art.

As described above, the roller contacts the bottom surface of the cooking chamber and the bottom surface of the turntable on its outer circumferential surface. Therefore, if foreign matters generated in the process of cooking food on the outer peripheral surface of the roller, the friction between the roller and the bottom surface of the cooking chamber is increased, the rotation of the roller may not be made accurately.

In addition, even if the roller does not rotate correctly, the turntable is rotated by the drive of the drive motor. Therefore, when the roller is in the state in which the outer peripheral surface is in close contact with the bottom surface of the cooking chamber and the bottom surface of the turntable, the roller may slide by the rotation of the turntable, the noise may occur.

The present invention is to solve the problems caused by the prior art as described above, an object of the present invention is to provide a roller and a rotating device including the same that can be accurately rotated.

Another object of the present invention is to provide a roller and a rotating device including the same that can minimize the noise generated during the rotation process.

Embodiments of the present invention for achieving the above object, the contact surface is provided on the outer circumferential surface, the contact surface in contact with the bottom surface of the cooking chamber and the bottom surface of the turntable rotatably installed in the cooking chamber; And an escape groove formed by recessing a portion of the outer circumferential surface and accumulating foreign matter; It includes.

Another embodiment of the present invention, a turntable rotatably installed in the cooking chamber; Claims 1 to 4, wherein the plurality of rollers rotatably supporting the turntable in the cooking chamber; And a driving motor providing a driving force to the turntable. It includes.

Another embodiment of the present invention, rotatably supporting the rotating member on the bottom surface, a part of its outer peripheral surface is in contact with the rotating member and the bottom surface, the remaining portion of the outer peripheral surface is recessed in its radial direction.

According to the roller and the rotating apparatus including the same according to the present invention, the rotation of the roller is more purified, and at the same time, there is an advantage in that noise generated during the rotation of the roller is prevented.

Hereinafter, with reference to the accompanying drawings an embodiment of a roller and a rotating device including the same according to the present invention will be described in more detail.

1 is an exploded perspective view showing an embodiment of a rotating apparatus according to the present invention, Figure 2 is a longitudinal sectional view showing a roller constituting an embodiment of the present invention.

Referring to this, the cooking chamber 11 for cooking food is provided in the cavity 10. In addition, a through hole 12 through which the turntable shaft 17 to be described later penetrates is formed at the center of the bottom surface of the cavity 10.

Meanwhile, the turntable 13 is rotatably installed on the bottom surface of the cooking chamber 11. Food is seated on the top surface of the turntable 13. The bottom of the turntable 13 is coupled with the turntable shaft 17.

The turntable motor 15 is installed below the cavity 10 corresponding to the lower side of the cooking chamber 11. The turntable motor 15 provides a driving force for rotating the turntable 13. The turntable motor 15 is provided with an output shaft 16.

In addition, a turntable shaft 17 is provided to transmit the driving force of the turntable motor 15 to the turntable 13. An upper end of the turntable shaft 17 is coupled to a bottom surface of the turntable 13. The lower end of the turntable shaft 17 is coupled to the output shaft 16 of the turntable motor 15.

Rotating ring assembly 19 is provided to rotatably support the turntable 13. The rotary ring assembly 19 is located between the bottom surface of the cooking chamber 11 and the bottom surface of the turntable 13. The rotating ring assembly 19 includes a rotating ring 20 and a plurality of rollers 21.

The rotary ring 20 is formed in a ring shape having a relatively smaller diameter than the turntable 13. The rollers 21 are installed on the outer circumferential surface of the rotary ring 20 to be spaced apart from each other by a predetermined center angle. The roller 21 rotates while substantially supporting the turntable 13.

Referring to FIG. 2, contact surfaces 22 are provided at both end portions of the outer circumferential surface of the roller 21. The contact surface 22 is in contact with the bottom surface of the cooking chamber 11 and the bottom surface of the turntable 13.

In addition, an escape groove 23 is formed at the center of the outer circumferential surface of the roller 21 corresponding to the contact surfaces 22. The escape groove 23 is formed by substantially recessing the central portion of the outer circumferential surface of the roller 21 in the radial direction of the roller 21. The escape groove 23 is where foreign matters generated in the process of cooking food are accumulated.

In this embodiment, the escape groove 23 is formed to have a trapezoidal cross section whose width increases toward the outer circumferential surface of the roller 21 at the center of rotation of the roller. This is to more easily remove the foreign matter accumulated in the escape groove (23).

Meanwhile, the shaft shaft hole 24 is formed at the abduction center of the roller 21. The rotating shaft hole 24 is a place through which a rotating shaft (not shown) for rotatably installing the roller 21 to the rotating ring 20 passes.

Hereinafter will be described the operation of the embodiment of the roller and the rotating apparatus including the same according to the present invention.

First, in order to cook food, the food is placed on the upper surface of the turntable 13. Then, the cooking chamber 11 is closed by closing the door (not shown), and the control unit (not shown) is operated to operate the microwave oven.

When the microwave oven is operated, a magnetron (not shown) and / or a heater (not shown) are driven to transmit microwaves and / or heater heat to the cooking chamber 11. And food is placed on the upper surface of the turntable 13 is cooked by heating by microwave or / and heater heat.

In addition, the driving motor 15 is driven at the same time as cooking of food. The driving force of the driving motor 15 is transmitted to the turntable 13 through the turntable shaft 17. Therefore, the turntable 13 substantially rotates about the output shaft 16 of the drive motor 15. When the turntable 13 rotates, the rotary ring assembly 19, more specifically, the roller 21 rotates while supporting the turntable 13. In this case, both end portions of the outer circumferential surface of the roller 21, that is, the contact surface 22, contact the bottom surface of the cooking chamber 11 and the bottom surface of the turntable 13.

In the process of cooking food in the cooking chamber 11, foreign substances such as food waste may fall on the bottom surface of the cooking chamber 11. Such foreign matters may be buried on the outer circumferential surface of the roller 21 which rotates while being in contact with the bottom surface of the cooking chamber 11.

By the way, in this invention, the escape groove 23 is provided in the outer peripheral surface of the said roller 21. Therefore, foreign matter dropped on the bottom surface of the cooking chamber 11 is accumulated in the escape groove 23. In this way, the foreign matter is accumulated in the escape groove 23 irrespective of the outer circumferential surface of the roller 21, so that the roller 21 rotates accurately without being disturbed by the foreign matter. In addition, since the rotation of the roller 21 is made accurately, the phenomenon in which the noise is generated while the roller 21 does not rotate but slides by the rotation of the turntable 13 is also prevented.

Within the scope of the basic technical idea of the present invention, many modifications are possible to those skilled in the art, and the scope of the present invention should be interpreted based on the appended claims. will be.

In the present embodiment, the avoidance groove is formed to have a substantially trapezoidal cross section, but is not necessarily limited thereto. In other words, the avoidance groove may have a triangular or square cross section.

According to the roller and the rotating device including the same according to the present invention configured as described above it can be expected the following effects.

First, in the present invention, foreign matters falling on the bottom surface of the cooking chamber are accumulated in the avoidance grooves, rather than the outer circumferential surface of the roller contacting the bottom surface of the cooking chamber or the bottom surface of the turntable. Therefore, the phenomenon that the rotation of the roller is prevented by such a foreign matter can be minimized.

In the present invention, the rotation of the roller is accurately made without being interfered by foreign matter, thereby preventing the roller from sliding due to the rotation of the turntable. Therefore, it is possible to minimize the friction generated by sliding the roller does not rotate.

1 is an exploded perspective view showing an embodiment of a rotating apparatus according to the present invention.

Figure 2 is a longitudinal sectional view showing a roller constituting an embodiment of the present invention.

Claims (8)

A contact surface provided on an outer circumferential surface and contacting a bottom surface of the cooking chamber and a bottom surface of the turntable rotatably installed in the cooking chamber; And A part of the outer circumferential surface formed to be recessed and an escape groove for accumulating foreign substances; Roller comprising. The method of claim 1, The escape groove is a roller that is increased in width toward the outer peripheral surface at the center of rotation of the roller. The method of claim 1, The contact surface is provided on both side ends of the outer peripheral surface, The escape groove is provided in the central portion of the outer peripheral surface corresponding to the contact surface. The method of claim 3, wherein The escape groove is a roller formed by recessing at least a portion of the central portion of the outer peripheral surface. A turntable rotatably installed in the cooking chamber; Claims 1 to 4, wherein the plurality of rollers rotatably supporting the turntable in the cooking chamber; And A driving motor providing a driving force to the turntable; Rotator comprising a. The method of claim 5, wherein Rotating device further comprises a rotary ring rotatably installed a plurality of the rollers. A roller is rotatably supported on the bottom surface, a part of its outer circumferential surface is in contact with the rotating member and the bottom surface, and the remaining portion of the outer circumferential surface is recessed in its radial direction. The method of claim 7, wherein Roller in which foreign matter accumulates in part on the outer peripheral surface to be recessed.

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