JP2005188800A - Microwave oven - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a drawer-type microwave oven capable of preventing the leakage of electric wave and the leakage of steam. <P>SOLUTION: A heating container 4 having an opening 3 at its upper side, is drawably accommodated in an accommodating part 5 of a cooker main body 2. A heating chamber 7 is formed by the heating container 4 and a top face 6 of the accommodating part 5 covering the opening 3. A clearance B is formed between a flange part 10 of a peripheral edge of the opening 3 and the top face 6 of the accommodating part 5 to allow the heating container 4 to be drawable. The heating container 4 accommodated in the accommodating part 5 is pushed up by a pushing-up means 8. The opening 3 of the heating container 4 is brought into contact with and closes the top face 6 to seal the heating chamber 7. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a drawer-type microwave oven in which a heating container for storing an object to be heated such as food is accommodated in a cooker body so as to be drawable.

  In general, a microwave oven has a structure in which an entrance for taking in and out an object to be heated such as food in and out of the heating chamber is provided on the side surface of the cooker body. When such a microwave oven is arranged at a low position, it is difficult to put an object to be heated in and out of the heating chamber.

  For example, Patent Document 1, Patent Document 2, and Patent Document 3 disclose a drawer-type microwave oven that facilitates taking in and out of an object to be heated. The drawer type microwave oven is provided with a drawer on which the object to be heated is placed so as to be freely drawn out from the heating chamber, and this drawer is drawn out so that the object to be heated can be taken in and out from above.

  FIG. 6 is a perspective view of the microwave oven disclosed in Patent Document 1. In the microwave oven of FIG. 6, a drawer 103 is constituted by a bottom plate 101 on which an object to be heated is placed and an opening / closing door 102, and the drawer 103 is slid into and out of the heating chamber 105 of the cooker body 104. Yes. In addition, the microwave oven of Patent Document 2 is designed to prevent the cooker body from overturning when the drawer is pulled out by exciting the electromagnet legs and attracting them to the kitchen counter, and pulling out the drawer and moving the center of gravity forward. It has become.

  FIG. 7 is a cross-sectional view of the microwave oven disclosed in Patent Document 3. The microwave oven shown in FIG. 7 has a structure in which a heating container 107 for storing an object to be heated 106 is provided so as to be freely put in and out of the cooker main body 108. An opening having a flange 109 on the periphery is provided on the upper side of the heating container 107, and when the heating container 107 is pushed into the cooker body 108, the opening is covered with the lid 110 of the microwave generator to form a heating chamber. It is supposed to be.

The lid portion 110 is provided with a choke groove 111, and when the heating container 107 is pushed into the cooker body 108, the flange portion 109 of the heating container 107 faces the choke groove 111 of the lid portion 110 to prevent leakage of radio waves. It is like that.
Japanese Patent Laid-Open No. 3-45820 (lower part of page 2, FIG. 2) JP-A-6-109257 (paragraph numbers 0009 and 0010) Japanese Patent Laid-Open No. 11-237053 (paragraph number 0030, FIG. 1)

  By the way, in the case of a drawer structure, it is necessary to form a gap between the cooker body and the heating container so that they do not rub against each other, and there is a concern about radio wave leakage and steam leakage from this gap.

  In the microwave oven of Patent Document 3, a choke structure for preventing radio wave leakage is provided, but this choke structure cannot prevent steam leakage, and the leaked steam is installed outside the heating container. There is a risk of causing serious defects such as rust and insulation withstand voltage failure in electrical components. Further, the choke structure for preventing radio wave leakage has a complicated shape, so that dimensional management is difficult and the cost of the mold tends to increase.

  An object of the present invention is to provide a drawer type microwave oven that can prevent radio wave leakage and steam leakage with a simple structure.

  In view of the above-mentioned problems, the present invention accommodates in a cooker body a pullable heating container having an opening on at least the upper side, and covers the opening of the heating container with a wall surface on the cooking apparatus body side to form a heating chamber. Provided with a microwave oven provided with push-up means for pushing up the heating container so as to close the upper opening of the heating container housed in the cooker body in contact with the wall surface on the cooker body side, on the assumption of the drawer type structure It is.

  According to this configuration, when the heating container is put in and out of the cooking device body, the heating container and the wall surface of the cooking device body that covers the opening of the heating container are not rubbed, while the gap is formed between them. After the container is accommodated, the heating chamber can be sealed by closing the upper gap of the heating container.

  If the push-up means includes a drive motor, a push-up base that pushes up the heating container, and a conversion mechanism that converts the rotation of the drive motor into the vertical movement of the push-up stand, the drive motor is electrically controlled to rotate, By reversely rotating or stopping, the heating container can be raised, lowered or stopped.

  Examples of the conversion mechanism include a pinion provided on the same axis as the drive motor and a rack that moves vertically while meshing with the pinion. Examples of other configurations of the conversion mechanism include a screw shaft provided on the same axis as the drive motor, a nut that is screwed to the screw shaft to move up and down, and a guide rod attached to the nut and the lifting base. it can.

  In addition, as other configurations of the push-up means, those using air cylinders, hydraulic cylinders, electromagnets, etc., those provided with a track that guides the heated container pushed into the cooker body upward, mechanically by operating a lever, etc. What pushes up a heating container can be illustrated.

  If the heating container is raised before cooking by the push-up means, and the heating container is lowered after cooking, a gap is formed between the heating container and the wall surface on the cooker body side when the heating container is put in and out. Inside, the heating chamber can be sealed. Further, by operating the push-up means in conjunction with the operation of the cooking switch, an individual operation for operating the push-up means can be made unnecessary.

  Also, a switch that detects the housing state of the heating container is provided, and a control unit that controls the push-up means by turning on this switch is provided, so that when the heating container is taken in and out, or when the heating container is not properly housed It is possible to prevent the push-up means from operating.

  Also, by providing a guide mechanism for taking the heating container in and out of the cooker body, this guide mechanism is composed of a rail provided on one side of the cooker body and the heating container and a roller provided on the other side. The heating container can be guided to a predetermined position of the cooker body.

  In addition, the heating container tries to incline by being pulled out until its center of gravity comes out of the main body of the cooker, but if the heating container is guided, the rails cover the top and bottom of the rollers to prevent lifting. The tilting of the heating container can be prevented. Further, if the rail is provided with a portion that allows the heating container accommodated in the cooker body to be pushed upward, it is possible to prevent the heating container from being hindered by the rail covering the top and bottom of the roller.

  Furthermore, it can also comprise so that a heating container may be taken in / out in connection with the opening / closing door which opens and closes the accommodating part which accommodates the heating container of a cooking appliance main body. Thereby, taking in / out operation of a heating container and opening / closing operation of an opening / closing door can be combined.

  According to the present invention, after the heating container is accommodated in the cooker body, the heating container is pushed upward to close the gap between the heating container and the wall surface on the cooker body side that covers the upper opening of the heating container. I have to. Thereby, since a heating chamber is sealed, it is possible to prevent radio wave leakage and vapor leakage with a simple structure.

  Hereinafter, the best mode for carrying out a microwave oven according to the present invention will be described with reference to the drawings. FIG. 1 is a front sectional view of a microwave oven according to the present invention. 2, 3 and 4 are side sectional views of the microwave oven. FIG. 2 shows a state where the heating container is pulled out, FIG. 3 shows a state where the heating container is accommodated, and FIG. 4 shows a state where the heating container is pushed up.

  This microwave oven is a drawer type microwave oven in which a heated object 1 such as food is taken in and out from above, and a cooking vessel body 2 and a heating container having an opening 3 on the upper side capable of storing the heated object 1 4, a storage part 5 for storing the heating container 4 in the cooker body 2 so that the heating container 4 can be pulled out, a heating chamber 7 surrounded by the heating container 4 and the top surface (wall surface) 6 of the storage part 5, and cooking start In conjunction with this, a pushing-up means 8 for pushing up the heating container 4 to seal the heating chamber 7 and a guide mechanism 9 for taking the heating container 4 into and out of the housing part 5 are provided.

  The heating container 4 is a metal container whose upper side is opened, and is composed of a box, and is composed of a bottom plate and a bottom plate 5 surrounding the four sides. The upper edge of the side plate is bent outward, and a collar portion 10 is formed so as to surround the opening 3. The eaves portion 10 comes into contact with the top surface 6 of the housing portion 5 when the heating container 4 housed in the housing portion 5 is pushed up by the push-up means 8. Thereby, the opening 3 is closed at the time of cooking, and the heating chamber 7 inside the heating container 4 is sealed so as to prevent leakage of radio waves and steam.

  The accommodating portion 5 forms a space for accommodating the heating container 4 inside the cooking appliance body 2, and is surrounded by the top surface 6, the bottom plate 16, and the left and right side walls 23, and a magnetron 14 to be described later on the rear side. Is arranged so that the heating container 4 can be accommodated through the front entrance 11. A microwave generator 12 and electronic components are built in between the wall surface surrounding the accommodating portion 5 and the cooker body forming the outer box.

  The top surface 6 of the housing part 5 is also used as a cover plate of a microwave generator 12 for supplying microwaves to the heating chamber 7, and a power supply port 13 is formed at a position located near the center of the heating chamber 7. ing.

  The microwave generator 12 includes a magnetron 14 disposed behind the housing 5 and a waveguide 15 formed above the top surface (cover plate) 6. The microwave generated by the magnetron 14 propagates through the waveguide 15, is supplied to the heating chamber 7 from the power supply port 13, and heats the object to be heated 1 stored in the heating container 4.

  The push-up means 8 includes a drive motor 17 disposed below the bottom plate 16 of the housing portion 5, a push-up base 20 that pushes up the bottom surface of the heating container 4, and a rotation of the drive motor 17 that moves the push-up stand 20 up and down. And a conversion mechanism for conversion. The conversion mechanism includes a first gear 18 directly connected to the drive motor 17 and a second gear 19 that meshes with the first gear 18 and converts the rotational force of the first gear 18 into a linear motion in the vertical direction. . An example of the first gear 18 and the second gear 19 is a rack and pinion mechanism.

  The guide mechanism 9 includes a total of ten rollers 21 that are rotatably provided on the left and right side surfaces of the heating container 4 and a total of two rails 22 that cause the rollers 21 to travel. The left and right side walls 23 are provided from the vicinity of the entrance 11 to the rear end.

  A belt-like roller support member 24 is fixed to the left and right side surfaces of the heating container 4, and five rollers 21 are attached to the roller support member 24 at unequal pitches. The roller support member 24 is arranged with its front end aligned with the front end of the heating container 4, and its rear end is set to a length that projects rearward from the rear end of the heating container 4. It can be pulled out from the housing 5 to the outside.

  The rail 22 has a U-shaped cross section with the inner side opened in the left-right direction, and the roller 21 is arranged between the upper and lower pieces. The space between the upper and lower pieces is large enough to allow the roller 21 to be traveled, and the upper side of the roller 21 traveling on the lower piece is covered with the upper piece. Thereby, the heating container 4 is prevented from being lifted by being pulled out from the accommodating portion 5, and the heating container 4 is stabilized.

  In the portion of the rail 22 corresponding to the position of the roller 21 in the state in which the heating container 4 is accommodated, an upper piece bending portion 25 is formed by bending the upper piece upward, and the interval between the upper and lower pieces is the other portion. Is set larger than. Thereby, a gap (A) is formed above the roller 21, and a space that allows the heating container 4 housed in the housing portion 5 to be pushed upward is formed. The clearance (A) above the roller 21 is set to be larger than the clearance (B) between the flange portion 10 of the heating container 4 and the top surface 6 of the accommodating portion 5 (A> B).

  When the heating container 4 is pulled out and the roller 21 is positioned on another upper piece curved portion 25, a gap is formed above the roller 21, so that the roller 21 and the upper piece curved portion 25 are provided at unequal pitches. . As a result, except for the accommodated state of the heating container 4, at least one of the rollers 21 is positioned away from the upper piece bending portion 25, and prevents the heating container 4 from being lifted during guidance.

  A detection means 26 for detecting the housing state of the heating container 4 is provided behind the housing part 5, and the control unit 39 electrically connected to the detection means pushes up according to the housing state of the heating container 4. 8 is controlled.

  The detection means 26 includes a pin 27 protruding from the rear portion of the heating container 4, a switch lever 28 that is pushed by the pin 27 when the heating container 4 is accommodated, and a micro switch 29 that is operated by the switch lever 28. .

  The switch lever 28 is rotatably provided in the housing portion 5 and is biased to a predetermined posture. When the heating container 4 is completely accommodated, the switch lever 28 pushed by the pin 27 is rotated to actuate the micro switch 29 provided in the vicinity thereof, and the ON signal of the micro switch 29 is controlled by the control unit. 39.

  The control unit 39 does not drive the drive motor 17 in a state where the micro switch 29 is not operated, and controls the drive motor 17 by receiving the ON signal from the micro switch 29 and the ON signal from the cooking switch. .

  The entrance / exit 11 of the accommodating part 5 is opened and closed by the opening / closing door 30 guided in a drawer shape by a guide part (not shown). The opening / closing door 30 and the heating container 4 are engaged with each other by an engaging portion 31 so that the movement of the opening / closing door 30 in the front-rear direction is interlocked with the heating container 4, and the heating container 4 is moved up and down by the push-up means 8. Is to be tolerated.

  Next, a procedure for operating the microwave oven will be described. First, as shown in FIG. 2, the opening / closing door 30 is pulled to open the entrance / exit 11, and the heating container 4 interlocked with the opening / closing door 30 is pulled out from the accommodating portion 5. At this time, the heating container 4 is supported by the rail 22 via the rear roller 21 and the roller support member 24. The upper part of the rear roller 21 is covered with the upper piece of the rail 22 so that the heating container 4 is prevented from tilting and falling.

  After the article to be heated 1 is stored in the heating container 4, the door 30 is pushed to close the entrance 11 as shown in FIG. 3, and the heating container 4 interlocking with the opening / closing door 30 is stored in the storage unit 5. In this accommodated state, the pin 27 rotates the switch lever 28 to operate the micro switch 29. As a result, the detection means 26 is in a state of detecting the accommodation state of the heating container 4, and the signal is input to the control unit 39. Each roller 21 is located on the upper piece bending portion 25 of the rail 22.

  Next, as shown in FIG. 4, when the cooking switch 38 is operated, the signal is input to the control unit 39. In the control part 39, the signal from the detection means 26 and the signal from the cooking switch 38 are input, and the push-up means 8 operates.

  The push-up means 8 pushes up the heating container 4 and seals the heating chamber 7. That is, the first gear 18 is rotated by the driving force of the drive motor 17 to raise the second gear 19, and the heating container 4 is pushed up via the push-up stand 20. Thereby, the clearance gap (B) between the collar part 10 of the heating container 4 and the top surface 6 of the accommodating part 5 is closed, the collar part 10 contacts the ceiling surface 6, and the opening 3 is closed. At this time, the gap (A) of the upper piece curved portion 25 of the rail 22 allows the roller 21 to rise.

  After the cooking is completed, the drive motor 17 rotates in the reverse direction, and the heating container 4 is lowered by an operation opposite to the pushing-up operation, so that a gap (B) is formed between the flange portion 10 and the top surface 6. Thereby, the heating container 4 can be pulled out from the entrance 11.

  According to the above configuration, at the time of guidance, the gap (B) is provided between the heating container 4 and the accommodating portion 5 so that they do not rub, and at the time of cooking, the heating chamber 7 is pushed up and hermetically sealed to leak radio waves and steam. Leakage can be prevented.

  In addition, this invention is not limited to said embodiment, A change can be suitably added within the scope of the present invention. For example, the heating container 4 is not limited to having the opening 3 only on the upper side, but has any opening as long as it has an opening on at least the upper side and forms the heating chamber 7 with the wall surface of the housing portion 5. It may be.

  FIG. 5 illustrates a combination of the heating container and the wall surface of the accommodating portion. FIG. 5A is the same as the above embodiment, and the heating chamber 7 is formed by the heating container 4 having the opening 3 only on the upper side and the top surface 6 of the housing portion 5. In this combination, the flange portion 10 is formed around the opening 3 of the heating container 4.

  The heating container 32 in FIG. 6B is a container (drawer) having openings 33 on the upper side, both side surfaces, and the rear surface, and the opening 33 is covered with the top surface 6, both side walls 34, and the rear wall 35 of the housing portion 5. Thus, the heating chamber 7 is formed. In this combination, the collar portion 10 is formed at the front end of the top surface 6 and the side walls 34 of the housing portion 5 and the lower ends of the side walls 34 and the rear wall 35.

  The heating container 36 in FIG. 6C is a container (drawer) having openings 37 on the upper side and the rear surface, and the opening is covered with the top surface 6 and the rear wall 35 of the housing portion 5 to form the heating chamber 7. To do. In this combination, the flange portion 10 is formed around the opening 37 of the heating container 4.

  Further, instead of providing the heating container 4 with the rollers 21 and providing the rails 22 with the housing part 5, the guide mechanism 9 may be provided with the rails 22 on the heating container 4 and providing the rollers 21 with the housing part 5. In this case, instead of the upper piece bending portion 25, a lower piece bending portion in which the lower piece of the rail 22 is bent downward is formed. Instead of the upper piece bending portion 25 or the lower piece bending portion, a notch for moving the roller 21 may be formed on the upper piece or the lower piece.

  The open / close door 30 may be a rotary type instead of a drawer type, and may be opened / closed independently of the heating container 4 being put in and out.

Front sectional view of the microwave oven according to the present invention Side view of microwave oven (with heated container pulled out) Side view of microwave oven (contained heating container) Side view of microwave oven (with heated container pushed up) The figure which shows the combination of a heating container and the wall surface of a accommodating part A perspective view of a conventional microwave oven Cross section of another conventional microwave oven

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 To-be-heated object 2 Cooker main body 3 Opening 4 Heating container 5 Storage part 6 Top surface 7 Heating chamber 8 Lifting means 9 Guide mechanism

Claims (9)

A drawer-type electronic device in which a heating container having an opening on the upper side is removably accommodated in the cooker body, and a heating chamber is formed by the heating container and a wall surface on the cooker body side that covers the opening of the heating container. In range
A microwave oven provided with push-up means for pushing up the heating container so as to close the upper opening of the heating container accommodated in the cooking device main body in contact with the wall surface on the cooking device main body side.   The microwave oven according to claim 1, wherein the push-up means includes a drive motor, a push-up stand that pushes up the heating container, and a conversion mechanism that converts rotation of the drive motor into vertical movement of the push-up stand.   The microwave oven according to claim 1 or 2, wherein the push-up means raises the heating container before cooking and lowers the heating container after cooking.   The microwave oven according to claim 1, 2, or 3, further comprising a switch that detects a housing state of the heating container, and a control unit that controls the push-up means when the switch is turned on.   A guide mechanism for taking in and out the heating container is provided in the cooker body, and the guide mechanism includes a rail provided in one of the cooker body and the heating container, and a roller provided in the other. The microwave oven according to any one of claims 1 to 4.   The microwave oven according to claim 5, wherein the rail covers the upper and lower sides of the roller so as to prevent lifting when the heating container is guided.   The microwave oven according to claim 6, wherein the rail is provided with a portion that allows the heating container accommodated in the cooker body to be pushed upward.   The microwave oven according to claim 1, wherein the heating container is put into and out of the cooking device body in conjunction with an opening / closing door that opens and closes a storage unit that houses the heating container of the cooking device body.   The microwave oven according to claim 8, wherein the opening / closing door is attached to a heating container so as to be movable up and down.

Images