KR20030014045A - Microwave oven having linear motioning tray - Google Patents

Abstract

PURPOSE: A microwave oven having a linearly moving tray is provided to effectively use a space of a heating chamber and to allow users to easily place foods on a tray by positioning the tray automatically at the center of the heating chamber. CONSTITUTION: A tray(10) has a rectangular shape corresponding to a bottom of a heating chamber. A depression(10a) is formed at a lower surface of the tray(10). An eccentric protrusion(22a), formed at an upper surface of a rotating member(22), is inserted into the depression(10a). An output shaft(Ms) of a driving motor(M) is coupled to a shaft(22b) which passes through a motor bracket(30) of the rotating member(22). The driving motor(M) is installed under the motor bracket(30). A roller assembly(26) is positioned between the bottom of the heating chamber and the tray(10). A micro-switch(32) having an actuator(32a) is installed at one side of the motor bracket(30) to set the tray(10) at the center of the heating chamber.

Description

Microwave oven having a linear moving tray

The present invention relates to a microwave oven, and more particularly, to a microwave oven configured to be configured to reciprocate a straight line inside the heating chamber, and to be located in the center of the center when stopped.

A microwave oven is a device that mainly heats an object (food) using a microwave having a constant wavelength. And the microwave oven is equipped with the heating chamber 2 for heating food, as shown in FIG. 1, and this heating chamber 2 is comprised so that it may open and close by the door 4. As shown in FIG.

The microwave 2 generated in the magnetron (not shown) is supplied to the heating chamber 2 to heat foods therein. At this time, the food to be heated should be uniformly heated by the microwave, the uniform heating is difficult to be made in the stationary state of the food due to the wavelength characteristics of the microwave.

Therefore, when the food is heated by the microwave, in order to uniformly heat the food, the microwaves are more uniformly incident on the food by rotating the tray 6 on which the food is placed. As shown in FIG. 1, in a conventional microwave oven configured to heat while rotating the tray 6 on which food is placed, there are disadvantages as follows.

In the microwave oven, the heating chamber 2 is generally formed in a square shape when viewed from the top view. However, the tray 6 for placing food is configured in a circle for rotation. Therefore, in the interior of the heating chamber 2, it can be seen that the area actually used for heating corresponds to the circle occupied by the tray 6. According to the conventional structure of the heating chamber as described above and the structure of the tray rotatably installed, it means that there are a lot of dead spaces that cannot be used for heating in the heating chamber 2 substantially. That is, according to the structure of the conventional heating chamber and tray, it can be seen that there is a problem in efficiency that the use efficiency of the space inside the heating chamber hits a certain limit.

In addition, the general microwave oven has the same problem as described above, and especially in a hooded microwave oven having a large transverse length, since the transverse length of the inside of the heating chamber is longer, the dead space cannot be used inside the heating chamber. There is a disadvantage that is further increased.

In order to solve the above disadvantages, it is an object of the present invention to efficiently use the space inside the heating chamber of a microwave oven and to provide a tray moving device that is more convenient for the user to store food.

The object of the present invention is that since the bottom surface of the heating chamber is usually implemented in a rectangular shape in a microwave oven, the tray is formed into a rectangle so as to correspond to this, and the rectangular tray is moved in a straight line from side to side and simultaneously operated. When this is stopped, attention is paid to the fact that the tray is always positioned at the center of the heating chamber.

1 is a perspective view of a conventional general microwave oven.

Figure 2 is a schematic diagram showing a moving concept of the tray of the microwave oven of the present invention.

Figure 3 is an exploded perspective view of the tray moving mechanism according to the present invention.

4 is a cross-sectional view of the tray moving mechanism according to the present invention.

Explanation of symbols on the main parts of the drawings

10 ..... Tray 10a ..... Home

22 ..... rotating member 22a ..... eccentric protrusion

30 ..... Motor Bracket 32 ..... Micro Switch

32a ..... Actuator 40 ..... Cam member

M ..... drive motor Ms ..... output shaft

A microwave oven according to the present invention for achieving the above object is provided with a tray formed in the bottom surface of the heating chamber of the microwave oven, the groove is formed in the groove extending in the front and rear direction; A rotating member inserted into the groove and having an eccentric protrusion eccentrically at the center; A drive motor for generating rotational power; A rotating shaft portion for transmitting the rotating force from the driving motor to the rotating member; A stop groove formed on the rotating shaft portion; And a micro switch in contact with the rotary shaft portion and having an actuator for generating a signal by the stop groove; When the tray stops the left and right movement, the tray is stopped in the center portion by a signal generated by the actuator by the stop groove.

And according to one embodiment, the stop groove is formed in the cam member is inserted into the rotary shaft portion to rotate together. This stop groove is preferably composed of a pair formed in a symmetrical position.

According to the present invention, the tray for placing and heating food is most preferably molded into a rectangle.

And a support means interposed between the bottom surface of the heating chamber and the tray to support the tray when the tray moves left and right. According to an embodiment of the support means, a frame is formed to be smaller than the area of the tray. And a plurality of rollers rotatably installed in the frame, and the linear reciprocating motion of the tray is supported by the rollers.

And a microwave oven according to another embodiment of the present invention, the tray is installed on the bottom surface for heating the microwave oven, the groove is formed in the front and rear direction extending in the bottom surface; A rotating member inserted into the groove and having an eccentric protrusion eccentrically at the center; A drive motor for generating rotational power; A rotating shaft portion for transmitting the rotating force from the driving motor to the rotating member; A micro switch having an actuator turned on and off by a contact and controlling whether the driving motor is operated; And operating means formed at at least one point of the rotating shaft portion and operating the actuator of the microswitch at a specific angular position of the rotating shaft portion; When the tray stops the left and right movement, the tray is stopped at the center part by a signal generated by the actuator by the operation means.

According to the present invention as described above, the tray made of a rectangle can be heated evenly while performing the left and right movement inside the heating chamber, and at the same time always in the center of the heating chamber when the left and right movement of the tray stops It is expected to have an advantage of being stopped, which makes it easy to use.

Next, the present invention will be described in detail with reference to the embodiments shown in the drawings.

First, Figure 2 is a schematic concept showing the linear movement of the tray according to the present invention. The tray 10 according to the illustrated embodiment is roughly shaped into a rectangular shape, and it can be seen that the shape corresponds to the bottom surface 20 of the heating chamber in the microwave oven. In this way, by making the tray 10 in a rectangular shape, according to the basic technical idea of the present invention configured to linearly reciprocate the tray within a predetermined range in the horizontal direction, it is possible to use the inside of the heating chamber more efficiently. will be.

In addition, according to the present invention, the tray 10, as shown in the direction of the arrow, rather than the conventional rotational movement to perform the left and right linear reciprocating motion. By performing the linear reciprocating motion as described above, when the microwave having a constant wavelength supplied to the inside of the heating chamber is irradiated to the food, it will be more uniformly irradiated to be able to heat the food evenly as a whole. That is, according to the present invention, in order to ensure that the microwave is uniformly irradiated with food, the basic conditions during heating by the microwave oven can achieve uniform heating by linearly reciprocating the tray 10 in the left and right directions. To make it work.

In addition, according to the present invention, the tray 10 is always located in the center of the heating chamber when the tray 10 to move left and right, that is, when the heating is completed and the tray 10 is stopped, Ease of use is further enhanced.

Next, with reference to Fig. 3 and a cross-sectional configuration of the perspective view of the device according to the present invention will be described with respect to the specific configuration for the left and right linear reciprocating motion of the tray.

As shown, according to the present invention, a groove 10a having a predetermined length is formed in the bottom surface of the tray 10. The groove 10a may be molded integrally with the tray 10, or may be molded using a separate member. In the illustrated embodiment, the groove 10a is formed in the central portion thereof by a constant edge portion 10b formed on the bottom of the tray 10. The front and rear lengths of the grooves 10a will be formed slightly larger than the range of the reciprocating motion of the tray.

In addition, the eccentric protrusion 22a formed on the upper surface of the rotating member 22 is inserted into the groove 10a formed on the bottom surface of the tray 10. The eccentric protrusion 22a is protruded from the upper surface of the rotating member 22, and is formed at an eccentric position that is regularly spaced in the circumferential direction from the center. The rotating member 22 is configured to rotate in conjunction with the output shaft Ms of the motor M. In the illustrated embodiment, the shaft 22b is formed in the lower center of the rotating member 22. ), The output shaft Ms of the drive motor M is inserted into and fixed, and is configured to transmit a rotational motion.

The drive motor (M) is provided in the lower portion of the motor bracket 30 which is provided in the lower portion of the bottom surface 20 of the microwave oven. The output shaft Ms of the driving motor M is connected to the shaft 22b while passing through the motor bracket 30.

The eccentric protrusion 22a should be inserted with a slight play in the groove 22a, and in the state inserted into the groove 22a, reciprocating the tray 10 from side to side in accordance with the rotation of the rotating member 22. You can exercise. That is, when the rotating member 22 is rotated, the eccentric protrusion 22a of the eccentric position is also rotated. At this time, the eccentric protrusion 22a draws a certain circle due to the eccentricity. The tray 10 is rotated in the left and right directions along a moving distance in the left and right directions. Of course, at this time, the eccentric protrusion 22a inserted into the groove 10a of the tray 10 cannot apply force to the tray 10 in the front-rear direction, so that the tray 10 is substantially only in the left-right direction. Will move.

At this time, when the tray 10 performs the reciprocating motion in a straight line, the amount of movement of the tray 10 substantially corresponds to the amount of eccentricity of the eccentric protrusion 22a. That is, the tray 10 will perform a reciprocating motion in a straight line by a distance corresponding to twice the distance from which the eccentric protrusion 22a is eccentric with respect to the rotation center of the rotating member 22.

A roller assembly 26 capable of supporting and guiding the linear reciprocation of the tray 10 is interposed between the heating chamber bottom surface 20 and the tray 10. The roller assembly 26 is comprised from the frame 26b of rectangular shape, for example, and the some roller 26a rotatably provided in the said rectangular frame. In addition, the roller 26a serves to support the tray 10 so as to perform a linear reciprocating motion with respect to the bottom surface 20 of the heating chamber. That is, when the upper surface of the roller 26a is in contact with the tray 10, and the lower surface of the roller 26a is in contact with the bottom surface of the heating chamber 20, and the tray 10 is linearly moved, The tray 10 is supported in a left and right direction and guides a linear motion.

One side of the motor bracket 30 is provided with a microswitch 32 having an actuator 32a. The micro switch 32 is controlled on / off by the actuator 32a.

3 and 4, the cam member 40 is installed on the shaft 22b of the rotating member which is connected to the output shaft Ms or the output shaft Ms of the motor to rotate. It is configured to. The cam member 40 is intended to allow the tray 10 to stop at the central portion of the bottom surface 20 of the heating chamber, as shown in FIG.

The cam member 40 is formed with stop grooves 42a and 42b symmetrically. And the other outer peripheral surface of the cam member 40 is formed in a circular shape. The cam member 40 is configured to contact the actuator 32a of the micro switch 32 installed on the motor bracket 30 in a state in which the cam member 40 is coupled to the output shaft Ms or the shaft 22b. That is, as shown in FIG. 4, the outer peripheral surface of the said cam member 40 is holding it in contact with the actuator 32a of the micro switch 32. As shown in FIG. As the cam member 40 rotates, when the stop grooves 42a and 42b of the cam member correspond to the actuator 32a, the actuator 32a pops up to turn off the micro switch 32. . The time point at which the microswitch 32 is turned off by the stop grooves 42a and 42b is when the tray 10 is at the center of the bottom surface 20 of the heating chamber, and the eccentric protrusion 22a is positioned in FIG. 2. (b) or the case where it is located in position (d).

In the present invention, the eccentric protrusion 22a of the rotating member 22 substantially stops the rotation of the drive motor M when the position b or the position d in FIG. It can be seen that (10) is configured to always stop at the center of the bottom surface of the heating chamber (20).

And in order to stop the movement of the tray 10 in the state located in the center of the center, the micro switch 32 is used to respond to a predetermined angular position of the shaft 22b or the output shaft Ms. It can be seen.

In the illustrated embodiment, the cam member 40 having the stop grooves 42a and 42b is inserted into the shaft 22b or the output shaft Ms and interlocked with each other. By turning off 32, the rotation of the drive motor M is stopped. Here, the shaft 22b or the output shaft Ms is defined as the rotation shaft portion. Therefore, the cam member 40 may be installed on the rotating shaft portion to be rotated together. However, it is of course possible to configure the actuator 32a of the micro switch 32 to react directly with the rotating shaft portion. For example, it is also possible to form a stop groove in the rotary shaft portion (22b, Ms), so that the micro switch 32 can be turned off by this stop groove. Or forming a stop projection on the rotary shaft portion 22b, Ms, and causing the micro switch to generate a constant electrical signal by the regular projection, and by this signal, the microprocessor of the microwave oven drives the drive motor M. Of course, it is also possible to configure to stop.

Next, the overall operation of the tray linear moving apparatus of the microwave oven according to the present invention configured as described above will be described.

When the driving of the microwave oven is started while the food to be heated is placed on the upper surface of the tray 10, the micro web is supplied into the heating chamber. As the microwave is supplied, the tray 10 is linearly reciprocated from side to side.

The driving of the driving motor M is started at the same time as the driving of the microwave oven. The rotational force of the drive motor (M) is to rotate the rotating member 22 through the shaft (22b) in the output shaft (Ms). Since the eccentric protrusion 22a of the rotating member 22 is inserted into the groove 10a formed on the bottom surface of the tray 10 with a slight play, the rotational movement of the rotating member 22 is It is converted into a linear reciprocating motion of the tray 10.

The length of the groove 10a should be designed to slightly exceed twice the amount of eccentricity of the eccentric protrusion 22a. That is, when the eccentric protrusion 22a performs the rotational movement, since the eccentric protrusion 22a reciprocates in the front-rear direction inside the groove 10a, no interference occurs between the eccentric protrusion 22a and the groove 10a. Of course it should not be.

Therefore, the tray 10 according to the present invention, while performing a linear reciprocating movement from side to side in the inside of the heating chamber can be heated while being irradiated with microwaves evenly on the top of the food.

When the heating operation is completed, the microwave supply is stopped and at the same time, the left and right movements of the tray 10 should be stopped. According to the present invention, the cam member 40 inserted into the rotary shaft portions 22b and Ms rotates according to the rotation of the drive motor, where the rotation of the drive motor is performed by the cam member 40 by the microswitch. It continues until 32 is turned off. That is, after the heating is completed, the cam member 40 is rotated at least about 180 degrees further, if the actuator 32a of the micro switch 32 enters the stop grooves 42a and 42b while rotating, The microswitch 32 is turned off. When the micro switch 32 is turned off, the driving of the driving motor M is stopped. At this time, the position of the tray 10 is located at the center of the bottom surface 20 as shown in FIG. And this position is substantially the state in which the eccentric protrusion 22a is in the position (b) or position (d) of FIG.

Therefore, according to the present invention, the left and right moving tray 10 can always stop at the center of the heating chamber, it is possible to have a very convenient advantage when the user puts in or take out food.

In the illustrated embodiment, the rotating member 22 having an eccentric protrusion 22a in an eccentric state, as an example of a transducer mechanism for converting the rotational motion of the drive motor M into a linear reciprocating motion of the tray 10. And, it can be seen that holding the groove (10a) is inserted into the eccentric protrusion (22a). However, the present invention is not limited by this embodiment, and many other modifications are possible as a converter tool capable of converting the rotational force of the driving motor M into a linear reciprocating motion of the tray 10. . Many other mechanical configurations, such as a transducer tool, can be used by a combination of a crank to perform a joint motion or a joint tool that is typically used as a linear reciprocating motion.

Within the basic technical scope of the present invention as described above, it will be apparent to those skilled in the art that many other modifications are possible, and that the present invention should be interpreted by the appended claims. Do.

According to the present invention as described above, since the tray 10 for performing the reciprocating motion is always configured to stop at the center of the heating chamber, when the tray is taken out or put in the heating chamber, it is very convenient to place it. Can be maintained. Accordingly, the tray can be conveniently positioned inside and outside the heating chamber so that the tray can be conveniently placed, and the convenience of use of the food can be easily accommodated. In addition, according to the present invention, by forming the tray in a rectangular shape, and configured to move left and right, it is also expected that the space inside the heating chamber can be more efficiently utilized.

Claims (9)

A tray which is provided on the bottom surface of the heating chamber of the microwave oven and has grooves extending in the front-rear direction on the bottom surface thereof; A rotating member inserted into the groove and having an eccentric protrusion eccentrically at the center; A drive motor for generating rotational power; A rotating shaft portion for transmitting the rotating force from the driving motor to the rotating member; A stop groove formed on the rotating shaft portion; And And a microswitch having an actuator in contact with the rotating shaft portion and generating a signal by the stop groove; And the tray stops at a central portion in response to a signal generated by an actuator by the stop groove when the tray stops left and right movement. The microwave oven according to claim 1, wherein the stop groove is formed in a cam member which is inserted into the rotation shaft part and rotates together. The microwave oven according to claim 2, wherein the stop groove is formed in a pair formed in a symmetrical position. The microwave oven of claim 1, wherein the tray is shaped into a rectangle. The microwave oven according to claim 1, further comprising support means interposed between the bottom surface of the heating chamber and the tray to support the tray when the tray is moved left and right. 6. The support according to claim 5, wherein the support means comprises a frame that is formed smaller than the area of the tray and a plurality of rollers rotatably installed on the frame, wherein the rollers support the linear reciprocating motion of the tray. Microwave oven, characterized in that. A tray provided on the bottom surface of the microwave oven and formed with grooves extending in the front-rear direction on the bottom surface; A rotating member inserted into the groove and having an eccentric protrusion eccentrically at the center; A drive motor for generating rotational power; A rotating shaft portion for transmitting the rotating force from the driving motor to the rotating member; A micro switch having an actuator turned on and off by a contact and controlling whether the driving motor is operated; And An operating means formed at at least one point of the rotating shaft portion and operating the actuator of the micro switch at a specific angular position of the rotating shaft portion; And the tray stops at a central portion in response to a signal generated by an actuator by the operation means when the tray stops left and right movement. 8. The microwave oven according to claim 7, wherein said operation means is formed in said rotating shaft portion and comprises a stop groove for turning off an actuator at a specific angular position. 8. The microwave oven according to claim 7, wherein said operation means is formed in said rotating shaft portion and comprises a stop projection which interlocks with an actuator at a specific angular position.