JPS60159521A - Electronic range - Google Patents

Abstract

PURPOSE:To develope mass-production effect and resolve the problem of safety accompanied by the separation of both parts by a method wherein a heating chamber, heating food, and an electric source section, supplying microwave to the heating chamber, are separated and respective independent parts are made into units while a starting switch is permitted to be moved by a plunger piece provided at the bottom plate of a main body to open and close it. CONSTITUTION:A safety switch 52 is pushed by a latch piece 41 when the base plate 53 of retaining section is moved by the plunger piece 62 to close a door 3 and the contact thereof is put ON. Another safety switch 90 is pushed by a mounting screw 91 and is put ON at all times. The contact of the starting switch 68 is put ON by the plunger piece 64 when a rod 75 is moved by the plunger piece 84 to push a start button 63. A connecter, connecting the electric source section 5 and the main body 1 electrically, is connected to integrate both of the sections.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a microwave oven in which a heating chamber for heating food and a power source section for supplying microwaves to the heating chamber are separated.

Composite types of microwave ovens have appeared that are equipped with various heating functions in addition to microwave heating, and are responding to diversifying needs. In addition, operating means and heating means are diverse due to the use of microcomputers and sensors, and two-model configurations are becoming more and more common. As a result, they were forced to produce a large number of models in small quantities, and were troubled by the inability to fully utilize the effects of mass production.

As a solution to this kind of problem, for example, 2
It is conceivable to separate the heating chamber and the power source section or control device as proposed in Japanese Patent No. 934 and Japanese Utility Model Application No. 54-77174. Even if there is a request to develop the design such as the appearance of the heating chamber, if it is possible to share the power supply section.

This is effective in mass production. Incidentally, in a microwave oven, the power supply unit including the microwave generation source such as a magnetron may often be separated from the heating chamber.

In such cases, it makes sense to carry out thorough separation.

The purpose of the present invention is to obtain a microwave oven that can be mass-produced even if the number of models increases, and for this purpose, the heating chamber for heating food and the power supply section for supplying microwaves to the heating chamber are separated, and each By making the parts into a unit, it is possible to respond to diversified needs by appropriately combining the two parts, and the mass production effect that comes with unitization is achieved, while also solving the safety problem that comes with separating the two parts. However, the aim is to provide a microwave oven that does not pose any practical problems.

Hereinafter, one embodiment thereof will be described with reference to the accompanying drawings.

In FIG. 1, 1 is a main body with a heating chamber inside, and 2 is a gear vignette forming the outer shell. 3 is a door which seals the heating chamber so as to be openable and closable, and 4 is a handle thereof. Reference numeral 5 denotes a power supply section for supplying microwaves to the heating chamber, and 6 indicates a cabinet t- which is entirely formed outside of the power supply section. Reference numeral 7 denotes an operation panel, which includes operation parts such as a timer knob 8. The main body 1 and the power supply part 5 are
It can be separated as shown in the figure.

In FIGS. 6 to 5, 9 indicates a heating chamber.

The heating chamber 9 has a rotary tray 10 for rotating food, which is an object to be heated. Reference numeral 11 denotes a rotary table that rotatably supports the rotating tray 10, 12 a bearing portion thereof, and 13 a motor for driving the rotary table. 14 is the heating chamber 9
A lamp illuminates the inside, 15 is its support, and 16 is its window. The lighting window 16 is formed by drilling a group of small holes in the heating chamber and blocking the holes with a transparent material such as glass, and illuminates the heating chamber 9 with the light emitted from the lamp and allows the food to be passed through the hole. It is constructed so that the emitted water vapor and the wind circulating inside the heating chamber 9 do not leak. 17 is an opening that supplies microwave energy to the heating chamber 9.
, 18 is a cover that closes the opening. This cover 1
8 uses a silicon laminate plate that has excellent transparency to microwave energy. Further, the cover 18 is fixed to the heating chamber 9 with mounting screws (not shown). 19 is a magnetron, and a waveguide 21 disposed within the power supply section 5
It is attached to. . 20 indicates the antenna. 22 is a waveguide provided on the main body 1 side;
1 and the other end communicates with the opening 17. The waveguide 21 is fixed to the chassis 26 of the power supply section 5 with extra screws, and the waveguide 22 is fixed to the wall of the heating chamber 9 with the same mounting screws. 24 is a blower motor that cools the magnetron, and 25 is a mounting base thereof. 26
27 is an air guide that guides the wind generated by the blower motor to the magnetron 19, and 27 is an air guide that guides the wind after cooling the magnetron from the power supply section 5 to the main body 1 side.

Reference numeral 28 denotes an air guide provided on the side of the main body 1 that communicates with the air guide 27, and one end of which is disposed inside the main body 1 so as to surround a group of openings 29 formed in the side wall of the heating chamber 9. .

30 is a group of small holes bored in the earthen wall of the heating chamber 9 in order to discharge the wind guided into the heating chamber 9 to the outside of the heating chamber 9;
is an air guide for discharging the entire body to the outside.

As shown in FIG. 5, the filter 2 is an extension of the upper part of the main body 1, that is, the surface that forms the front opening of the heating chamber 9, and the cabinet 2 faces the space surrounding the earthen wall of the donor '3. air guide 61. It is configured to be discharged to the outside of the main body 1 through the opening 32. Reference numeral 63 denotes a member called a bottom plate that surrounds the bottom of the heating chamber 9 of the main body 1, and the bottom plate 56 includes a power supply section 5.
It has a convex filter 4 projecting to the side. The filter 5 is a recess provided in a portion of the cabinet 6 of the power supply section 5 facing the above-mentioned convex filter 4. 94 is a convex portion 34. The bottom plate 63° around the recess 351 is each flat part of the cabinet 6. Recess 3
5 and the convex portion 64 are configured to engage with each other while forming a space 36 at a constant interval. The space 36 is a gap provided between the bottom plate 53 of the main body 1 and the cabinet 6 of the power supply part 5, and as shown in FIG. It is connected to. 68
is a transformer that constitutes the power supply circuit of magnetron 19, and 39 is also a capacitor. Reference numeral 40 denotes a group of edges provided on the chassis 26 of the power source section 5, and the structure is such that wind flows back into the power source section 5 through the edge group 40.

In FIGS. 6 and 7, 41 is a launch piece attached to the door 6 so as to be openable and closable, and 42 is a coil spring that applies a return force to the launch piece 41. The launch piece 41 is attached to a member 45 called a door front plate using a mounting bracket 44. The mounting bracket 44 has a rotating shaft 46, and the latch piece 41 rotates around the rotating shaft 46. 46 is a stopper piece of the latch piece 41, and the rotation angle of the shear stopper piece 46 is regulated by a cut-and-raised piece 47 formed by cutting and raising a part of the mounting fitting 44. 48 is a dielectric member called a choke cover that closes the opening of the choke cavity of the door front plate 45, and the launch piece 41 is passed through a small portion of the choke force bar 48.
protrudes toward the heating chamber side. Further, the latch piece 41 has a substantially arc-shaped hook portion 49 that engages with a locking portion provided on the main body side.

The key part 49 engages with the locking part of the door 3f: when the door is closed, it holds the door 3 in a closed state, and when the door 3 is opened, the latch piece 41 rotates when the handle 4 is pulled towards you. The lever portion 49 is configured to be separated from the locking portion. Reference numerals 50 and 51 are locking portions for the hook portion 49 of the latch piece 41 provided on the main body 1 side. The locking parts 50 and 51 are the hook part 4
Similar to 9, it has a substantially arcuate shape, and the coil spring 42
The locking parts 50 and 51 are brought into pressure contact with each other by a tensile force of , thereby holding the door 6 in a closed state. The locking portion 50 is used when the power supply portion 5 is not attached to the main body 1 as shown in FIG.
is used when the power supply portion 5 is attached to the main body 1 as shown in FIG.

Reference numeral 52 denotes a safety switch, and this safety switch 52 is arranged near the illustrated locking part 51, and when the power supply part 5 is attached to the main body 1, it is pressed by the latch piece 41 to close the contacts of the safety switch 52. It looks like this. Reference numeral 53 denotes a locking portion base plate having locking portions 50 and 51 formed therein, and a safety switch 52 is mounted on this locking portion base plate 56.

The locking portion board 56 is designed to move when the power source portion 5 is attached to the main body 1, but since the locking portion 51 and the safety switch 52 are integrally fixed, the positional relationship between the two may shift. There isn't.

Therefore, the contact point of the safety switch can be adjusted in advance so that it will not turn on unless the power source section 5 is reliably attached to the main body 1.

The locking portion base plate 53 is made of plastic and has moving shafts 54 and 55 extending vertically and linearly integrally therewith. 56 and 57 are moving axes 54 and 55
It is a bushing that slides on each.

These bushings 56 and 57 are fixed to a mounting base 58. Reference numeral 59 denotes a coil spring, which is arranged coaxially with the moving shaft 54 and generates a pressing force to push down the locking portion base plate 53. Reference numeral 60 denotes a stopper portion provided on a part of the moving shaft 55, and the diameter of the moving shaft 55 is partially enlarged. This stopper portion 60 restricts the position to which the locking portion substrate 53 is moved downward. That is, when the power source section 5 is not attached to the main body 1, the hook portion 49 of the latch piece 41 restricts the locking portion base plate 53 to a position where it engages with the locking portion 50.

Reference numeral 61 denotes an opening provided in the bottom plate 63 of the main body 1, and this opening 61 is located at a portion facing the moving shaft 55. 6
This is a plunger piece attached to the cabinet A of the two-piece power supply section 5 facing the moving shaft 55. Plunger piece 62
is inserted into the main body 1 through the opening 61 when the power supply part 5 is attached to the main body 1, pushes the moving shaft 55 open, and moves the locking part base plate 53. The plunger piece 62 has a length suitable for engaging the hook part 49 of the latch piece 41 with the locking part 51. That is, safety switch 5
The locking portion substrate 56 is moved to a position where the contacts No. 2 are closed and microwave energy can be oscillated.

It is configured to be held in that position by a coil spring 59.

Here, when the power supply section 5 is attached to the main body 1 with the door 3 closed as shown in FIG. Even in this state, the locking part 5o pushes up the latch piece 41,
The power source portion 5 can be attached to the main body 1 by removing the lock portion 49 from the locking portion 5o and leaving the door 6 in an open state.

In FIGS. 8 and 9, reference numeral 63 denotes an operation button for a starting switch that starts energizing the power supply circuit, and is referred to as a start button. The start button 66 is attached to the operation panel 7 so as to be freely retractable.

64 is a plunger piece of the start button 63, 65 is a coil spring, 66 is a stopper piece, and 67 is a blind pin. The plunger piece 64 of the start button presses the starting switch 68 when the power supply section 5 is attached to the main body 1, and serves to turn on the contact point.

The starting switch 68 is supported by a movable body 69, and the movable body 69 is rotatably mounted on a support body 70 around a rotating shaft 71. The support 70 is the chassis 26 of the power supply part 5
It is fixed with mounting screws (not shown). The movable body 69 rotates parallel to the support body 70, and its restoring force is provided by the coil spring 72. The coil spring 72 is attached to the movable body 69 and the support body 70 by hook portions hooked onto upright pieces 73 and 74, respectively, which are cut and raised. 75 is a rod for moving the movable body 69;
This rod 75 is movably attached to the support 70 via springs 76 and 77. The rod 75 passes through an opening 78 in an upright piece 73 of the movable body 69, and when the rod 75 moves to the left in the figure, the upright piece 73 is pressed by the suppressing part 79, and the starting switch 68 is turned counterclockwise. It is configured to rotate in the direction. The pressing portion 79 is formed by flattening a portion of a rod having a circular cross section.

Reference numeral 80 denotes a part called a roller attached to the rod 75, and the roller 80 is mounted so as to rotate about a rotating shaft 81 formed by bending one end of the rod 75 at a right angle. 82fd: This is a stopper ring that holds the starting switch 68 in the state shown in FIG. It is inserted by press fitting. 86 is the roller 8 in the cabinet 6 of the power supply section 5.
0, and 84 is an opening provided in a part opposite to the main body 1.
This is a plunger piece attached to the bottom plate 36 of. This plunger piece 84 has a smaller protruding height than the convex portion 54 provided on the bottom plate, so that even if the main body 1 is placed on the floor without being combined with the power supply section 5, the weight of the main body 1 will be reduced. It does not join the jar piece 84.

By the way, when the power source part 5 is not attached to the main body 1, as shown in FIG. 8, the tension of the coil spring 72 causes the start switch 68 to be at a position where the start button 66 cannot be pressed by the plunger piece 64 even if the start button 66 is pressed. It is in. The protrusion dimension of the plunger piece 64 is restricted by a stopper piece 66, and even if the start button 65 is pushed all the way down, the starting switch cannot be turned on. Power supply part 5
When the is attached to the main body 1, the plunger piece 84 attached to the main body 1 is inserted into the power supply part 5 through the opening 86 as shown in FIG. 9, and the rod 75 is moved horizontally while rotating the roller 8o. and press the start button 66.
The starting switch 68 is moved to a position where it can be operated using the Granger piece 64.

In FIG. 10, reference numeral 85 indicates an overlapping portion provided in the waveguide 21 on the side of the power source section 5. This overlapping portion 85 protrudes from the cabinet 6 of the power supply section 5 toward the main body 1 side.

That part is inserted into the inside of the main body side waveguide 22 and serves to connect the waveguides 21 and 22. Further, the protruding height of the nine overlapping portions 85 is larger than that of the convex portion provided on the bottom plate, and the configuration is such that the waveguides are first connected and then joined together. Waveguide-#r22 has a 7 rank piece 86,
This 7-rank piece 86 is fixed to the bottom plate 33 of the main body 1 by welding. therefore.

No leakage of radio waves occurs between the 7-rank piece 86 and the bottom plate 33. 87 is a flange piece of the waveguide 21,
The flange piece 87 is arranged on the outside of the cabinet B. Reference numeral 88 is an elastic and conductive backing material, and this backing material presses the bottom plate 36 and the seven-run piece 87 to prevent radio waves from leaking from that part.

In FIG. 11, reference numeral 89 is an opening provided in the cabinet B of the power supply section 5, and this opening communicates with the air guide 27 and between the cabinet 6 and the bottom plate 33 on the main body side.
It also communicates with a space 36 formed by. As shown in Figure 3, the wind that cooled the magnetron 19 is transferred to the air guide 2.
7, most of the wind returns to the air guide 28, and a small part of the wind passes through the opening 89 and follows the path to the space 36, where it is sent to the rear of the main body 1 shown in FIG. It is configured to be discharged to the outside from an opening 37 provided. 90 indicates a safety switch. The safety switch 9o is placed near the mounting screw 91 that fixes the cabinet 2 of the main body 1 to the cabinet 6 of the power supply section 5, and the safety switch 9o is actuated by the mounting screw 91 as shown in the figure.
The configuration is such that microwave energy can be oscillated when the side cabinet 2 is fixed to the power supply side cabinet A. A sufficient number of mounting screws 91 are appropriately provided to secure the main body 1 to the power source section 5. Reference numeral 93 denotes a portion where the cabinet 2 overlaps with the cabinet 6 on the power supply section 5 side. It also serves to improve the appearance by enclosing the joint 92 with the cabinet 6.

It also functions as a barrier to prevent the air that has passed into the space 36 through the small gap in the joint 92 from leaking from that part. The overlap portion 93 has a smaller protruding dimension than the convex portion 64 provided on the bottom plate 36.

The structure is such that even when the main body 1 is placed directly on the floor, the weight of the main body 1 is not applied to that part.

Although the present invention is configured as described above, the operation of the ninth order will be explained. At the stage of shipping from the factory, the main body 1 and the power supply section 5 are in a separated state at 11, as shown in FIG. For both, the main body 1 is equipped with various heating functions, and the power supply section is equipped with various operating means and heating means, depending on the needs of the customer. The user selects a combination that meets his needs from among various combinations. In response to user needs, the main body 1 and power supply section 5 are separated from each other with safety switches 52 and 90. The starting switch 68 cannot be turned on, and the power supply section 5 cannot oscillate microwave energy. Furthermore, even in an incompletely connected state, one of the switches does not turn on, and the same situation as described above occurs. What is the connection between the two?

When the power supply section 5 is placed on a horizontal stand and the main body 1 is lowered vertically, first the waveguides 21 and 22 are connected, and then the air guides 27 and 28. The convex part 34 of the bottom plate 33 and the concave part 35 of the power supply section cabinet 6. and plunger piece 62 and opening 61. The plunger piece 84 and the opening 83 are combined, the flat parts 94 are joined, and the lamp part 3 of the cabinet 2 on the main body 1 side overlaps the cabinet 6 on the power supply part 5 side, completing the combination. Then, tighten the mounting screws 91 to integrate the main body 1 and the power supply part 5. In such a state, all the switch groups are ON or [
It becomes possible to turn ON. First, the safety switch 52 is
The locking portion base plate 53 is moved by the plunger piece 62 to the state shown in FIG. 7, and when the door 3 is closed, it is pressed by the latch piece 41 and its contact becomes ON. The safety switch 90 is pressed by the mounting screw 91 and is always in the ON state. The starting switch 68 has a plunger piece 84 that moves the rod 75 to the state shown in FIG. 9, and when the start button 65 is pressed, the plunger piece 64 moves.
This makes it possible to turn on the contact point of the starting switch 68. Then, a connector (not shown) for electrical connection between the power supply section 5 and the main body 1 is connected to complete the integration of the two.

In this state, when the food to be heated is placed on the rotating saucer 10, the door 3 is closed, and the start button 66 is pressed, the contacts of the safety switch 53 and the start switch 68 are turned ON, and the magnetron 19 emits microwave energy. starts. When you release the hand pressing the start switch 6B & the start button 63, the contacts turn OFF, but the relay's holding circuit (not shown) continues to oscillate the microwave energy. Microwave energy is supplied to the heating chamber 9 through the waveguides 21 and 22 and the opening 17.Then, the food is heated by the microwave energy while rotating with the rotating saucer 10.
It will be done. As the magnetron 19 operates, the blower motor 24 is started and cooling air is sent to the magnetron 19. The cooling air of the magnetron 19 is taken in from the mouth group 40 provided in the yarn 23 of the power supply section 5, and then passed through the transformer 58. The condenser 59 is cooled and reaches the blower motor 24.

The wind after cooling the magnetron 19 is the air guy)”27
After that, most of it reaches the air guide 28.

The inside of the heating chamber 9 is refluxed, and the small end group 30. air guide 31,
The path to the outside is followed through the opening 32.

The water vapor emitted from the food is then released to the outside.

On the other hand, part of the wind that has cooled the magnetron 19 flows through the opening 8.
It flows back into the space 36 through the passage 9 and is discharged to the outside through the opening 37. As a result, an effective heat insulating layer is formed between the main body 1 and the power supply section 5, and even if the heating chamber 9 is heated to a high temperature by a heater or the like, the transfer of the heat to the power supply section 5 is reduced.

The above-described embodiment configured as described above has the following effects. First, in a configuration in which the main body 1 equipped with a heating chamber and the power supply portion 5 that supplies microwave energy to the main body 1 are separated.

(11 The main body 1 is equipped with various heating functions, and the power supply section 5 is equipped with various operating means and heating means.) Needs can be met by a combination of the two, and applications can be expanded.

(2) Conventionally, expansion of applications required production of many models in small quantities, but this can be achieved with a small number of model configurations, and the mass production effect can promote cost reduction. It has a powerful effect.

Next is the structure that combines the two.

(3) It is a configuration in which both are combined in the vertical direction.

Combining is easy.

(4) Place the heavy power supply part 5 on the bottom side.

Since the heavy main body 1 is placed on the upper side, it can be easily combined.

(5) The state of the combination is such that the weight of one is supported by the other, that is, the weight of the main body 1 is supported by the power source section 5, and a support body that supports the weight of the main body 1 is not particularly required. It can be easily configured.

(6) A convex portion and a flat portion around the concave portion are formed at the connecting portion between the two, and the flat portion supports the weight of the main body 1, and the convex portion.

Since the recesses are engaged to regulate the positional relationship between the two, reliable merging is possible.

(7) It has a simple structure in which the operating means for the starting switch 68, that is, the start button 63, is moved to a position where the starting switch 68 can be operated in response to the combination of the two, and the operation is reliable. It can be of any configuration.

(8) Furthermore, the protrusion height of the plunger piece 84 that presses the starting switch 68 is determined by the protrusion 3 provided on the bottom plate 63 of the main body.
Since the size is smaller than that of the plunger piece 84, the weight of the main body 1 is not added to the plunger piece 84 even when the main body 1 is placed directly on the floor without the two parts being combined. It can be made into a highly flexible structure.

According to the above-mentioned 9 inventions, it is possible to provide a microwave oven with excellent sophistication that can meet diversifying needs even when the number of model configurations increases. Since it can be moved to open and close, the operation is reliable and safe.Also, since it has a concave part, a convex part, and a flat part, it can be assembled securely, and the protruding height of the plunger piece can be adjusted to make it convex. Since the dimensions are smaller than that of the previous section, a highly reliable structure can be achieved.

[Brief explanation of drawings]

1 and 2 are perspective views of a microwave oven according to an embodiment of the present invention. FIG. 1 shows a state in which the main body and power supply part are combined, FIG. 2 shows a state in which they are separated, and FIG. Figure 3 is a sectional view of the main parts of the combined state seen from the front, Figure 4 is a sectional view of the main parts seen from the top, Figure 5 is a sectional view of the main parts seen from the side, and Figure 6. and Fig. 7 are cross-sectional views of the main parts of the door that opens and closes the heating chamber, Fig. 6 shows the state in which both are not combined, and Fig. 7 shows the state in which both are combined. Figures 8 and 9 are cross-sectional views of the main parts of the power supply section, Figure 8 shows the state of the starting switch when both are not combined, and Figure 9 shows the state of the starting switch when both are combined. Figure 8 and Figure 9 both show the start button in its pressed state at the time of starting.
FIG. 10 is a sectional view of a main part of a connecting part of a waveguide, and FIG. 11 is a sectional view of a main part of a connecting part of an air guide. Explanation of the numbers 1...Main body, 5...Power supply part. 9... Heating chamber, 33... Bottom plate on the main body side. 34...Protrusion provided on the bottom plate. 35...Four parts installed in the cabinet on the main body side. 66...Space, 63...Start button. 64.84...Plunger piece, 68...Start switch. 75...lot, 72...coil spring. 94...Flat area. Applicant: Hitachi Thermal Appliances Co., Ltd. Figure 1, Figure 2r! gJ Cause 6 Figure 8 Figure 9

Claims (1)

[Claims] A main body (1) equipped with a heating chamber (9) for storing food and a power supply section (5) that oscillates microwave energy are each provided independently, and a protrusion (64) is provided on the bottom plate (36) of the main body (1).
) and the plunger piece (84), and also the power supply part (5
), the concave part (35) facing the convex part (mouth 4), the flat part (94) around it, the plunger piece (64) of the start button (63), and the plunger piece (84) contact each other. A Rondo (75) that moves in the horizontal direction, a starting switch (68) that moves with it and faces the plunger piece (64), and a coil spring (72) that restores their movement.
), and the projecting height of the plunger piece (84) is made smaller than the convex part (34), and one main body (1) is placed on the power source part (5), and the convex part (34) and the concave part ( 65) so that the weight of the main body (1) is supported by the flat part (94), and the starting switch (65) is supported by the plunger piece (84).
8) can be opened and closed, and those that are not mounted are equipped with coil springs (
72) A microwave oven characterized in that it cannot be opened or closed due to K.