JPH0587411U - microwave - Google Patents

Abstract

(57) [Abstract] [Purpose] In a microwave oven that has a cooktop that moves up and down with rotation, the width and pattern of the up and down movement can be easily changed, and the load on the rotating shaft of the cooktop is reduced. To make the rotation of the work table smoother. In addition, the entire microwave oven can be designed compactly. [Structure] A raising / lowering mechanism of a cooking table includes a rod that reciprocates substantially horizontally below the cooking table by a drive source, and a rod that is interlocked with the rod and moves up and down in a substantially vertical direction and abuts the cooking table at its upper end. It consists of a lifting rod that supports the cooking table.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a microwave oven for cooking food and thawing it by microwave irradiation from a magnetron.

[0002]

[Prior Art]

 Conventionally, there has been a technique in which a rotatable cooking table is provided at the bottom of a cooking chamber and food on the cooking table is rotated to irradiate microwaves. And since it is not possible to prevent uneven heating simply by rotating the cooking table, there was a technique for moving the cooking table up and down simultaneously with rotation. For example, it is a technique disclosed in Japanese Utility Model Publication No. 52-152445 and Japanese Utility Model Publication No. 52-132433. That is, the device of Japanese Utility Model Laid-Open No. 52-152445 forms the lower surface of the turntable in a wavy uneven surface and moves up and down as the turntable rotates. A rack is formed on the rotary shaft of the turntable, and a pinion rotated by another drive source is meshed with the rack.

[0003]

[Problems to be solved by the device]

 However, in the device of Japanese Utility Model Laid-Open No. 52-152445, since the uneven shape of the lower surface of the turntable cannot be changed, there is an inconvenience that the width of vertical movement of the turntable and the pattern cannot be changed. Although the vertical movement width and pattern of the turntable can be changed for the time being, the rack is formed on the rotary shaft of the turntable and the pinion is meshed with the rack. However, there are drawbacks such as the need to be that wide, and a large load only on the rotating shaft.

[0004]

[Means for Solving the Problems]

 The present invention provides a microwave oven in which a cooking table is rotatably provided at the bottom of a cooking chamber, and the microwave oven irradiates the cooking table, and includes an elevating mechanism for moving the cooking table up and down. A microwave oven including a rod that reciprocates substantially horizontally below the table, and an elevating rod that is interlocked with the rod and moves up and down in a substantially vertical direction, and abuts the cooking table at its upper end to support the cooking table. .

[0005]

【Example】

 1 is an explanatory view of the main parts, FIG. 2 is an external perspective view, and FIG. 3 is a partially cutaway front view. A door (2) is attached to the front side of a rectangular box-shaped case (1) so that it can be opened and closed. A cooking chamber (3) is formed inside the door (2), and a cooking table (5) on which the food (4) to be heated is placed is provided at the bottom of the cooking chamber (3), and the cooking table (5) is provided on the upper surface of the cooking table (5). An oven heater (6) for radiating heat rays toward the interior is installed above the cooking chamber (3).

Further, the microwave from the magnetron (7) is radiated by being dispersed inside the cooking chamber (3) through the magnetron (7) which generates microwaves and the perforations (9) of the top plate (8). A stirrer (10), a cooling fan (11) for cooling the magnetron (7), and a motor (12) are arranged inside the case (1) of the machine, and a microwave guide passage (13) is provided. The microwave from the magnetron (7) and the cooling air from the fan (11) are supplied to the stirrer (10) through the microwave, and the microwave reflected by the stirrer (10) is applied to the cooking table (5). is doing.

A timer dial (14) for setting the microwave irradiation time of the magnetron (7), a door button (15) for opening the door (2), and a start button (16) for starting a heating operation. The case (1) of the main unit is arranged on one side of the front surface.

Further, as shown in FIG. 1, a rotating motor (29) for rotating the cooking table (5) in a plane is provided, and the T-shaped tip of the output shaft (30) of the motor (29) is connected to the cooking table ( 5) Engage with the core shaft (31) on the bottom surface of the center to allow the core shaft (31) to slide in the axial direction and to output the output shaft (30) and the core shaft (31) in an interlocking rotatable manner. The shaft (30) and the core shaft (31) are connected.

Further, a plurality of lifting rods (33) (33) are supported on a bottom plate (27) of the cooking chamber (3) through guides (32) so as to be vertically movable, and an upper end side of the rods (33) is on a cooking table. (5) An elevating mechanism for supporting the lower end side of the case (1) of the machine, which is provided with a lifting motor (34) and a rotating arm (35) interlocking with the motor (34) while being brought into contact with the lower surface side. The upper ends of the foldable links (36) (36) are connected to the lower ends of the rods (33) (33), while the link rods (36) (36) are connected to the connecting rod (37) and the crank rod (38). Via the crank arm (38) by the motor (34) to expand and contract the link (36), and the rod (33) is moved up and down to move the cooking table (5) up and down. Configured to run ing. In this embodiment, foldable links (36) and (36) are used as means for converting the power of the connecting rod (37) in the substantially horizontal direction into the vertical movement of the lifting rod (33). It is obvious to replace it with a mechanism.

The output shaft (30) is rotationally driven by the motor (29) to planarly rotate the cooking table (5) in one direction, and the microwave of the magnetron (7) is a quadrature waveform. , Since the integral value of the amplitude is constant in the arbitrary quarter-wavelength section of the sine waveform, the rotary arm (to obtain a vertical movement distance of one-quarter or more of the microwave wavelength of the magnetron (7) ( By setting the arm length of 35), it is configured that the rotation of the rotating arm (35) causes the cooking table (5) to move up and down to a quarter or more of the wavelength of the microwave of the magnetron (7). There is. For example, since the microwave of the magnetron (7) is 2450 HZ and the wavelength is 12 cm, the microwave from the magnetron (7) is unevenly distributed in the cooking chamber (3) by moving the cooking table (5) up and down by 3 cm or more. However, the food on the cooking table (5) is uniformly irradiated with microwaves.

A stop switch (28) for detecting the lowermost position of the cooking table (5) is provided, and when the power of the motor (34) is turned off, the switch (28) causes the cooking table (5) to move. After detecting the downward movement of the table, the motor (34) is turned off to stop the cooking table (5). The present embodiment is configured as described above. The dial (14) and the start button (16) are operated to irradiate the microwave from the magnetron (7) to the cooking chamber (3) for a certain period of time. ), The motors (29) and (34) are operated, and the rotary arm (35) is rotationally driven, whereby the cooking table (5) is rotated and moved up and down to move the cooking table (5) on the cooking table (5). The food is irradiated with microwaves almost uniformly and the food is cooked or thawed from the frozen state.

The rotation speed of each of the motors (29) and (34) is controlled to adjust the rotation speed and the vertical movement speed of the cooking table (5), and the rotation arm (35) and the crank rod (38). The vertical stroke of the cooking table (5) is adjusted by changing the connecting length of), and when the large food is placed on the cooking table (5), the lifting motor (34) is stopped, Only the rotation motor (29) is operated to rotate the cooking table (5) at a constant height. Further, it is possible to move the cooking table (5) only up and down, and rotate the cooking table (5) and vertically move the cooking table (5) separately, and displace the cooking table (5) by a combination of the respective operations. Is something that can be done.

[0013]

[Effect of the device]

 As is clear from the above description, in the microwave oven of the present invention, the vertical movement width and vertical movement pattern of the cooking table can be easily performed only by controlling the rotation speed of the motor (34), and the rotating shaft of the cooking table can be easily changed. Since no power for vertical movement is input to itself, the rotating shaft is not overloaded and the rotation of the cooking table is smooth. Moreover, a relatively narrow reciprocating rod that can be passed under the cooking table is relatively narrow. It only requires a space and has the advantage that the entire microwave oven can be designed compactly.

[Brief description of drawings]

FIG. 1 is an explanatory view of essential parts showing an embodiment of the present invention.

FIG. 2 is a perspective view of the same.

FIG. 3 is a front view of the same portion with a notch.

[Explanation of symbols]

 (3) Cooking room (5) Cooking table (29) Rotating motor (33) Lifting rod (34) Lifting motor (35) Rotating arm (36) Foldable link (37) Linking rod

Claims (1)

[Scope of utility model registration request] 1. A cooking table is rotatably provided at the bottom of the cooking chamber,
In a microwave oven for rotating a cooking table at the time of microwave irradiation, an elevating mechanism for moving the cooking table up and down is provided, and the elevating mechanism includes a rod that reciprocates substantially horizontally below the cooking table by a drive source, and the rod. A microwave oven, comprising: an ascending / descending rod that is interlocked to move up and down in a substantially vertical direction and abuts on a cooking table at its upper end to support the cooking table.