JP2003159176A - Microcomputer-controlled rice cooker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a microcomputer-controlled rice cooker which has high static electricity resistance and insulation properties by equipping insulation members in between the metallic outer case and the circuit board equipped with various charging parts even when the rice cooker is miniaturized. <P>SOLUTION: This microcomputer-controlled rice cooker is equipped with the vessel main body comprising an inner case to form the inner wall, a shoulder member to form the upper end part, a metallic outer case to form the outer wall, and a bottom member to form the bottom part, a lid member openable against the vessel main body, a heating means equipped in between the inner case and the bottom member, an operation panel equipped with a display device and various kinds of operating buttons, and a longitudinally placed circuit board equipped with various kinds of charging parts. Insulation members are equipped in between the metallic outer case and the charging parts on the circuit board. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention uses a metal such as stainless steel for an outer case forming an outer wall of a container body, and improves the problems of insulation distance and static electricity that occur when the overall shape is made compact. The present invention relates to an insulating structure of a microcomputer type rice cooker.

[0002]

2. Description of the Related Art Recent microcomputer type rice cookers have a very precise control form, which enables efficient rice cooker control and accurate heat retention control for a long period of time thereafter. It is one.

On the other hand, for the purchaser, not only the function of being convenient, but also the design element such as the rice cooker is regarded as one furniture, and the portability and occupancy of the rice cooker. Needs are changing so that products that are easier to use are also considered in consideration of the area. In order to meet the needs, the outer case of the microcomputer type rice cooker is made of metal such as stainless steel, and products with improved design effect are on the market. In addition, manufacturers have made various efforts to reduce the size of the entire product in view of the demand for compactness, and it is true that the size of the entire product is smaller than that of conventional products.

By the way, the microcomputer type rice cooker adopts an induction heating system including a work coil or the like as a heating means, and therefore, a backup battery, various capacitors,
Various electronic circuit elements such as an IGBT (power transistor) and a transformer required for controlling the rice cooker by a microcomputer are mounted on a substrate arranged in the front space of the rice cooker. Further, a coil terminal mounting member is provided on the substrate, and a cord reel connection terminal connected to the cord reel is further provided in the rear space of the rice cooker. And many of these become charging parts. In such a rice cooker, for example, when a charged object such as a person touches an outer case made of metal, static electricity is discharged to the outer case, and if the distance between the outer case and the charging part is small, the charging part is further charged with static electricity. Known to jump in. In addition, when the outer case of an electric product is made of metal, it is obliged by law to keep the distance between the outer case and the charging component a certain distance or more.

For this reason, when the outer case of the microcomputer type rice cooker is made of metal and the overall size of the rice cooker is to be made compact, a metal outer case and a charging part including various electronic circuit elements or various terminals are used. Will come close to each other, and as a result, the static electricity entered from the metal outer case
It adversely affects various electronic circuit elements built in the rice cooker or other electric products. That is, speaking of adverse effects on various electronic circuit elements built in the rice cooker, there is a problem that a component weak in static electricity, in other words, a component having a small electrostatic force, such as an IGBT, malfunctions, and thus the rice cooker malfunctions. Will cause. Of course, if the insulation distance is small, it also violates the legal regulations.

[0006] In the past, no microcomputer type rice cooker having an outer case made of metal has dealt with the problem of static electricity that occurs when the rice cooker is made compact.

[0007]

SUMMARY OF THE INVENTION An object of the present invention is to solve the problems of the prior art, and more specifically, by adopting the structure described in the claims, it is possible to make the rice cooker compact. At the same time, it is to provide an insulating structure of a microcomputer type rice cooker having high static resistance and high insulation resistance.

[0008]

In order to achieve the above object, the present invention adopts the following configuration.

According to the first aspect of the present invention, there is provided a container body including an inner case forming an inner wall, a shoulder member forming an upper end portion, a metal outer case forming an outer wall, and a bottom member forming a bottom portion, and the container. A lid member that can be opened and closed with respect to the main body, a heating means provided between the inner case and the bottom member, an operation panel equipped with a display device and various operation buttons, and various charging components are attached, and a vertical direction is provided. A microcomputer type rice cooker comprising a substrate to be arranged, wherein an insulating member is provided between the metallic outer case and the charging component of the substrate.

With such a structure, the design effect of the rice cooker is enhanced and the rice cooker can be made compact. Further, even if static electricity is discharged to the outer case due to some external cause, the various electronic circuit elements on the substrate are not adversely affected. Further, by forming the insulating member upright from the bottom member or hanging from the shoulder member, the insulating member is integrally formed from an existing member to facilitate its molding.

According to a second aspect of the present invention, the insulating member is attached by using a screw attached near the charging component. With such a configuration, even if the insulating member is newly formed as a separate body, its attachment is mainly for other purposes in the past, for example, a screw for attaching a cooling fan and a heat sink is used. Therefore, there is no increase in the number of parts and their mounting process.

In the invention according to claim 3, the screw is for attaching the substrate to the substrate holding member. With such a configuration, similarly to the operation of the invention according to the second aspect, the number of parts and their mounting steps do not increase.

In the invention according to claim 4, among the charging components attached to the substrate, tall components are provided in the direction of the bottom member. With this configuration, since the bottom member is made of resin, no matter how tall the component may be near the bottom member, the component will not be adversely affected.

According to a fifth aspect of the present invention, the charging component attached to the substrate is attached below the lower end of the metallic outer case. With such a configuration, the charging component attached to the board is located near the resin bottom member, and like the operation of the invention according to claim 4,
No matter how close the part is to the vicinity of the bottom member, the part is not adversely affected.

In the invention according to claim 6, the insulating member is provided by extending the bottom member. With such a configuration, the insulating member can be formed integrally with the bottom member, so that the number of manufacturing steps is not particularly increased as compared with the case where the insulating member is separately formed, and when the insulating member is separate. The installation screw, which was indispensable for, is no longer required.

In the invention according to claim 7, the insulating member is provided by extending the substrate holding member. With such a configuration, the insulating member can be formed integrally with the substrate holding member as in the case of the operation of the invention according to claim 6, so that the insulating member can be particularly manufactured in a manufacturing process as compared with a case where the insulating member is separately formed. Does not increase, and the installation screw, which was indispensable when it was a separate body, becomes unnecessary.

According to an eighth aspect of the present invention, the boards are arranged in parallel in the longitudinal direction, and tall charging parts are provided on the board on the inner side. With such a configuration, the tall charging component can be moved further away from the metal outer case, and adverse effects on the component can be reduced.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

(First Embodiment) FIG. 1 is a cross-sectional view in which the present invention is applied to a microcomputer type rice cooker. In addition, "front" described in this specification refers to the operation panel direction shown in FIGS. 1 to 3, "rear" refers to the opposite hinge side direction, and "left and right" is orthogonal to the front-rear direction. Pointing to the side
“Upper” and “lower” refer to the vertical direction in FIGS. 1 to 3, and “vertical” refers to the vertical direction.

As shown in FIG. 1, the microcomputer type rice cooker 1 is roughly divided into a container body 2 capable of accommodating an inner pot 10 therein,
It comprises a lid member 3 capable of opening and closing the upper opening of the container body 2. The lid member 3 is made of resin such as polypropylene (PP) and is composed of an upper lid 31, a lower lid 32, a heat dissipation plate 33, and an inner cover 35. A heat insulating material 36 formed as a vacuum heat insulating structure is interposed in the internal space formed between the upper lid 31 and the lower lid 32. A heater 34 is disposed on the upper surface of the heat dissipation plate 33, and the heat dissipation plate 33 is attached to the heater 34.
To heat the contents in the inner pot 10 from above. The vacuum heat insulating structure 36 is made of SiO ₂ , Zr.
A heat insulating material formed by wrapping a particulate porous ceramics powder having low thermal conductivity such as O ₂ or Al ₂ O ₃ with two metal sheets such as aluminum and evacuating the inside, It is possible to improve the heat insulating property in the temperature range of 50 ° C to 200 ° C. In addition,
The heat insulating material 36 may be not a vacuum heat insulating structure such as this but a normal material such as expanded polystyrene.

A pressure regulating lid 37 is arranged in the central portion of the lid member 3, and a valve member (not shown) is provided inside the pressure regulating lid 37. When the internal pressure rises above a predetermined level, the pressure inside the vapor is regulated. It is discharged to the outside from a steam port 39 via a steam passage 38 formed in the lid 37. Further, a hinge mechanism 40 having a known spring therein is provided on the rear side of the lid member 3, and the lid member 3 is locked or unlocked by a lock member 41 provided on the upper front side of the rice cooker 1. It can be opened and closed freely with respect to the container body 2.

The container body 2 has an outer case 4 forming an outer wall, an inner case 5 in the outer case 4 forming an inner wall, a shoulder member 6 forming the upper ends of the inner and outer cases 4, 5, and rice cooking. It comprises a bottom member 8 forming the bottom of the vessel 1.
Although they are shown as being separately formed, the inner case 5 and the shoulder member 6 may be integrally formed in order to reduce the production cost.

The outer case 4 is made of metal such as stainless steel and has a cylindrical shape with upper and lower openings to form the body of the rice cooker 1. The upper and lower ends of the outer case 4 are recessed in a form in which a step is provided inward, that is, a form including a horizontal portion 4a and a vertical portion 4b. At the upper end portion of the outer case 4, the horizontal portion 4a abuts on the lower end portion of the shoulder member 6, and the vertical portion 4b is positioned on the lower end side wall portion of the shoulder member 6, while at the lower end portion of the outer case 4. Contact the horizontal portion 4a with the upper end of the bottom member 8 and connect the vertical portion 4b to the bottom member 8
Located on the upper side wall of the 3 member 4 with screws (not shown),
6, 8 are integrally connected.

The shoulder member 6 is made of resin, such as polypropylene (PP), and forms the upper end of the container body 2, and the hinge mechanism 40 and the handle 7 are provided on the inner rear and outer peripheral sides thereof. Each is provided. The handle 7
When carrying the rice cooker 1, the rice cooker 1 is rotated 90 degrees to the uppermost position, and the rice cooker 1 is carried at that position. After carrying it, rotate it 90 degrees to the rear side again and store it in the position shown in the figure.

The inner case 5 forming the inside of the container body 2 has a W shape which is almost the same shape as the inner pot 10, and a ring-shaped heat retaining heater 9 is attached to the outer circumference of the inner case 5 with an aluminum sheet. The inner pot 10 stored in is heat-insulated from the side.
Then, the outer case 4 and the inner case 5 are firmly fixed to the shoulder member 6 by force fitting means using locking pieces and locking grooves (not shown) and screws (not shown).

The bottom member 8 forming the bottom of the rice cooker 1 is made of a resin such as polypropylene (PP) similar to the inner case 5, and is attached to the inner case 5 or the like by screws (not shown). The bottom member 8 constitutes a bottom shell of the rice cooker 1, an intake port 8e is provided in the front of the bottom shell, and an exhaust port (not shown) is provided in the rear thereof, and a plurality of legs 8f are provided on the bottom surface thereof. It is provided.

Reference numeral 10 denotes an inner pot housed in the inner case 5, which is made of iron or magnetic stainless steel or the like made of a highly magnetic material in which the eddy current induced inside is large, or It is possible to use aluminum that is light in weight and has a low skin resistance, and is formed by pressing magnetic stainless steel having a high skin resistance only on the bottom of the work coil where the magnetic flux hits, or by welding iron.

The whole has a W-shaped cross section similar to the inner case 5. When the inner pot 10 is housed in the inner case 5, the central bottom surface of the inner pot 10 is formed at the center of the bottom of the inner case 5. The top of the center sensor 12 protruding via the through hole 5a is pressed. Then the center sensor 1
2 is pushed down, energizes the control circuit, and enables heating control of the rice cooker 1. That is, unless the inner pot 10 is housed in the inner case 5, the inner pot 1 is controlled so that the heating control is not performed.
0 and the center sensor 12 function as a safety device of the rice cooker 1. The center sensor 12 is a well-known one and includes a reed switch for detecting the set state of the inner pot 10 and a thermistor for detecting the temperature of the inner pot 10.

When cooking, the inner pot 10 containing the contents such as rice and rice is stored in the inner case 5, and the upper opening is closed by the lid member 3 to start heating. Pot 1
The seal material 11 is provided between the upper end portion of 0 and the inner cover 35.
, The inner pot 10 is hermetically sealed, and induction heating is performed by a work coil or the like described later.

At the bottom and side of the lower surface of the inner case 5,
A bottom coil 45 and a corner coil 46 are arranged respectively, and these bottom coil 45 and corner coil 46 are fixed by a coil stand (not shown). Bottom coil 45
The corner coil 46 is formed by winding a copper wire concentrically a required number of times and connecting and arranging the same in series at the central portion and the outer peripheral portion. Reference numeral 13 is a code reel, and reference numeral 13a is a code reel terminal.

In the front space 15 of the rice cooker 1, an operation board holding member 16 made of resin is arranged. The operation board holding member 16 includes various switch buttons 19 and a display device 20.
An operation board 17 on which the above components are arranged is attached near the operation panel 18. The lower end portion of the operation board holding member 16 hangs further downward so that the power supply board holding member 6 extends in the vertical direction.
Forming 0. A power supply board 61 is attached to the power supply board holding member 60 with screws (not shown), and various electronic circuit elements 62 used for power supply, such as a backup battery and a capacitor, are mounted on the power supply board 61. Are placed.

Reference numeral 22 is a control board holding member, which is provided behind the power board holding member 60 and in parallel with the power board holding member 60, and is fixed to the shoulder member 6 by a screw (not shown). In addition, in this embodiment, the power supply substrate holding member 60 and the control substrate holding member 22 are described as separate members, but both members 6 are formed in a form as shown in the drawing.
0 and 22 may be integrally formed. A control board 23 is attached to the control board holding member 22 with screws 24, and a power transistor (IGBT) necessary for induction heating and various electronic circuit elements 63 as various drive circuit elements are attached to the control board 23. ing. These various electronic circuit elements 63 include elements that generate heat, such as the above-mentioned IGBT, and the control board 23 cools the fins 27 as heat sinks for promoting heat dissipation of these heat generating elements and the fins 27. A cooling fan 25 for mounting is attached by screws (not shown).

Two coil terminal attachment members 65 as shown in FIG. 4 are attached to the lower side of the control board holding member 22 near the end portions in the left-right direction. 4 and 5 are the same, and only one is attached in the vicinity of the left end portion of the control board holding member 22. The coil terminal mounting member 65 is made of metal, and has left and right side plates 65a, 65a, a back plate 65b, and a bottom plate 6.
5c, as shown in FIG. 5, left and right side plates 65a, 65a
The back plate 65b and the back plate 65b are bent to form a U-shaped cross section, and the bottom plate 65c integrally formed with the back plate 65b is placed in front of the rear plate 65c.
It is formed by bending it by 0 degree. A screw 6 for attaching the control board 23 to the control board holding member 22 is provided on the back plate 65b.
8 has a hole 65d into which the bottom plate 65c can be inserted.
A screw hole 65e into which a screw 67 for fixing the coil terminal 66 can be screwed is provided. Then, screw 68 to the back plate 6
5b is inserted into the hole 65d from the front side, and the screw 68 is further screwed into the screw hole 22a formed in the control board holding member 22 through the hole 23a formed in the control board 23. 65 and the control board 23 are simultaneously connected to the control board holding member 22. In this case, the insulating sheet 75 described later is fixed at the same time. As shown in FIG. 4, a screw 67 is screwed into a screw hole 65e provided in the bottom plate 65c via a coil terminal 66.

The bottom coil 45 and the corner coil 4 are formed by these operating devices and various electronic circuit elements.
6, the heater 34 and the heat retention heater 9 are controlled, and optimal rice cooking and heat retention control are performed. The cooling fan 25 is
In order to maintain various electronic circuit elements and the like at an optimum temperature, air is sucked from an intake port 8e provided in front of the bottom member 8 and below the cooling fan 25, and cooling air is pushed out above it. In that case, the control board 23 applies the cooling air to the operation board 17, the power supply board 61, and the control board 23 side.
Divide to the coil side.

Reference numeral 50 is a shield plate for magnetic shielding. The shielding plate 50 is made of a material having a small skin resistance and a large magnetic shield effect,
For example, it is made of aluminum and has a circular or polygonal shape surrounding all the coils 45 and 46, and its height covers at least the vertical height of the corner coil 46, preferably the bottom coil 45 and the corner coil 46. The height is equal to or higher than the vertical height including, and not only the corner coil 46 but also the magnetic flux from the bottom coil 45 is shielded.
Further, the shield plate 50 is arranged in the vicinity of the bottom coil 45 and the corner coil 46 so as to surround the coils 45, 46, abuts on the control board holding member 22 and prevents movement, and by a screw not shown, It may be fixed to the control board holding member 22 or may be fixed by a means such as sandwiching it between the lower end surface of the coil base (not shown) and the ribs standing on the bottom member 8. That is, the shielding plate 50 is arranged inside the control board holding member 22 and shields the magnetic flux so that the outer case 4 is not heated.

As described above, in the rice cooker 1, the power supply board 61 and the control board 23 are arranged in the front space 15 thereof, and various electric circuit elements 6 are provided on these boards 61 and 23.
2, 63 are provided. Further, the coil terminal mounting member 65 is provided below the control board 23 as described above, and the cord reel terminal 13a is disposed on the cord reel 13 behind the rice cooker 1 as shown in FIG. To be done.
Therefore, when the rice cooker 1 is made compact, the metal outer case 4, the various electric circuit elements 62 and 63 as charging components, and the various terminals 13a come close to each other. Then, the static electricity discharged to the outer case jumps into the charging parts.

In order to eliminate such an adverse effect, the present invention provides the rice cooker 1 with the following means. That is, FIG.
As shown in FIG. 3, a resin insulating member 70 is provided between the metal outer case 4 and the various electric circuit elements 62 and 63 and the various terminals 13a. The insulating member 70 is erected from the bottom member 8 in the form of a wall along the outer periphery of the bottom member 8 in the vicinity of the outer case 4. The height of the power supply board 61
Various electric circuit elements 62 as charging parts arranged on the upper side,
The height is higher than that of 63 and various terminals 13a and 66. That is, the insulating member 7 formed integrally with the bottom member 8 near the outer case 4 in the space between the outer case 4 and the charging component.
0 is interposed in a ring shape at a predetermined height.
In this case, outer ribs 71 are radially provided on the outer side and a plurality of inner ribs 72 are radially provided on the inner side as reinforcing members.

Since the electrostatic resistance and the insulation resistance can be enhanced by such means, the distance between the outer case 4 and the charging component can be reduced without paying attention to the distance, and the rice can be cooked. It is possible to make the container 1 compact. Further, since the insulating member 70 is formed integrally with the bottom member 8, it is not necessary to process parts for mounting the insulating member 70 and holes for mounting the mounting parts. Further, by vertically arranging the insulating member 70 near the outer case 4, when the outer case 4 receives an external force from the outside, the case 4 does not have a large dent, and thus has a deformation preventing function.

Although the insulating member 70 has been described as being provided in a ring shape along the outer circumference of the outer case 4, the insulating member 70 is provided with the charging parts only from the outer case 4 where the charging parts are present. It may be arranged so as to stand upright from the bottom member 8 in a concealed form. Further, the insulating member 70 is the bottom member 8
Although it has been described that it is erected from above, it may be of a form hanging from the shoulder member 6.

By the way, the power supply board 61 and the control board 23
Various electric circuit elements 6 as charging parts arranged above
Since there are various heights of 2, 63, as shown in FIG. 1, the tall charging component may be provided on the lower side of the substrate in the direction of the bottom member 8 or the lower end of the outer case 4. It is better to attach it below. FIG. 2 shows such a modification. That is, the lower ends of the power supply board 61 and the control board 23 are extended below the lower end of the outer case 4, and the power supply board 6
1 and the charging components arranged on the control board 23 are attached below the lower end of the outer case 4. With such a configuration, it is possible to further reduce adverse effects on the charging component. In such a configuration, the charging component is insulated by the bottom member 8, so that the insulating member 70 can be omitted. 1 and 2 (the same applies to FIG. 3 described later), the power supply board 61 and the control board 23 and the two boards are provided in parallel in the front-rear direction. If it is provided on the inner side of the control board 23 near the center, the distance to the outer case is expanded to that extent, and the electrostatic resistance and insulation resistance are further enhanced.

(Second Embodiment) FIG. 3 shows a sectional view of a second embodiment in which the present invention is applied to a microcomputer type rice cooker. The feature of this embodiment is that the power board holding member 6 is provided.
The insulating member is integrally formed by using 0. It should be noted that description of components common to those of the first embodiment will be omitted.

That is, like the first embodiment, the operation board holding member 16 made of resin is arranged in the front space 15 of the rice cooker 1. An operation board 17 on which various switch buttons 19 and a display device 20 are arranged is attached to the operation board holding member 16 in the vicinity of the operation panel 18. The lower end portion of the operation board holding member 16 hangs further downward to form a power board holding member 60 in the vertical direction. A power supply board 61 is attached to the power supply board holding member 60 with screws (not shown), and is used on the power supply board 61 for power supply, for example, a backup battery,
Various electronic circuit elements 62 such as capacitors are arranged.

By the way, the power supply substrate holding member 60 is made of resin and functions as an insulating member. Therefore, in this embodiment, the power supply board holding member 60 is extended and the extended portion is bent forward in a substantially U-shape.
The bent front end is made to function as the insulating member 60a. Then, the charging component placed on the power supply board 61 is arranged behind the insulating member 60a having the bent front end.

Reference numeral 22 denotes a control board holding member, which is provided behind the power board holding member 60 and in parallel with the power board holding member 60, and is fixed to the shoulder member 6 by a screw (not shown). A control board 23 is attached to the control board holding member 22 with screws 24, and a power transistor (IGBT) necessary for induction heating and various electronic circuit elements 63 as various drive circuit elements are attached to the control board 23. ing. These various electronic circuit elements 63 include elements that generate heat, such as the above-mentioned IGBT, and the control board 23 cools the fins 27 as heat sinks for promoting heat dissipation of these heat generating elements and the fins 27. A cooling fan 25 for mounting is attached by screws (not shown).

The control board holding member 22 is also a member made of resin and also functions as an insulating member. Therefore, like the power board holding member 60, the control board holding member 22 is extended, the extended portion is bent forward in a substantially U-shape, and the bent front end is made to function as the insulating member 60b. The charging component to be placed on top is arranged behind the insulating member 60b having the bent front end. By the way, since the control board 23 is located rearward of the power supply board, the insulating member 60b may not be particularly provided as long as the charging component arranged there is secured a sufficient distance from the outer case 4.

In this case, around the cord reel terminal 13a on the rear side of the rice cooker 1, an insulating member 70 similar to that of the first embodiment is partially erected from the bottom member 8 to cope with the problem. An outer rib 71 and an inner rib 72 are also provided as needed.

Since the antistatic property and the insulation resistance can be enhanced by such means as well, the distance can be reduced without paying attention to the distance between the outer case 4 and the charging component, and the cooked rice can be cooked. It is possible to make the container 1 compact. Further, since the insulating member 60a is formed integrally with the power supply board holding member 60 or the control board holding member 22, there is no need to machine a screw for mounting the insulating member 60a and a hole for mounting the mounting screw. It becomes unnecessary.

(Third Embodiment) FIGS. 4 to 6 show
The 3rd Embodiment which applied this invention to the microcomputer type rice cooker is shown. FIG. 4 is a perspective view showing a state in which an insulating sheet made of an insulating member is simultaneously attached to a coil terminal attaching member when a screw attaching the coil terminal attaching member is attached, FIG. 5 is a plan view thereof, and FIG. The development view of a sheet is shown. The feature of this embodiment resides in that the insulating member is attached to the charging component by using a screw which is mainly used for other purposes near the charging component. It should be noted that description of components common to those of the first embodiment will be omitted.

The charging component targeted in this embodiment relates to the coil terminal mounting member 65. The coil terminal attachment member 65 is a member that electrically connects the circuit element provided on the control board 23 and the coil as the heating means, and is attached to the control board holding member 22. However, the coil terminal mounting member 65 is a member in which electric charges are easily accumulated, and should be provided as far as possible from the metal outer case 4 for insulation. Therefore, the control board holding member 22 is placed near the resin bottom member 8.
Is provided near the lower end of.

Since the cooling fan 25 is arranged below the control board holding member 22 as shown in FIGS. 1 to 3, the lower end of the control board holding member 22 straddles the cooling fan 25. Since the coil terminal mounting member 65 is provided at the lower end of the control board holding member 22, the coil terminal attachment member 65 must be provided at the lower end of the control board holding member 22 which is closer to the left-right direction. Inevitably, the distance between the coil terminal mounting member 65 and the left and right outer cases must be shortened, and there was concern about insulation. This embodiment deals with such an adverse effect.

In FIGS. 4 and 5, one attached to the vicinity of the left end portion below the control board holding member 22 is shown.
Show individual. The coil terminal mounting member 65 is made of metal and has left and right side plates 65a, 65a, a back plate 65b and a bottom plate 65c,
As shown in FIG. 5, left and right side plates 65a, 65a and a back plate 65b
And are bent to have a U-shaped cross section, and a bottom plate 65c integrally formed with the back plate 65b is bent 90 degrees toward the front. The control board holding member 22 is provided on the back plate 65b.
A hole 65d into which a screw 68 for attaching the control board 23 can be inserted is provided in the bottom plate 65c.
A screw hole 65e into which a screw 67 for fixing 6 can be screwed
Is provided. Then, the screw 68 is inserted into the hole 65d from the front of the back plate 65b, and the screw 68 is further screwed into the screw hole 22a formed in the control board holding member 22 through the hole 23a formed in the control board 23. As a result, the coil terminal attachment member 65 and the control board 23 can be simultaneously connected to the control board holding member 22.

In this embodiment, the coil terminal mounting member 65 has been described as having the back plate 65b, but the back plate 65b is not provided, and the left and right side plates 65a, 65a and the bottom plate 65c are formed. In addition to having a U-shaped cross section, the U-shaped cross section may be directly attached to the control board 23 with an adhesive.

Reference numeral 75 is an insulating sheet as an insulating member. The insulating member 75 is made of PET and is formed in a substantially rectangular shape as shown in a developed view in FIG. This insulating member 75 has four parts 75a, 75b, 75c, 75d.
Folds 75f and 75g are provided between the portion 75a and the portion 75b and between the portion 75b and the portion 75c, respectively. Further, a hole 75e through which the screw 68 can be inserted is formed in the portion 75a, and a portion 75d is formed in the portion 75d.
It is cut to make it easy to hold, and is considered to be a low-height portion.

The mounting state of the insulating member 75 is shown in FIGS. That is, the fold 75f of the insulating member 75 is preliminarily folded on the valley side and the fold 75g is folded on the mountain side in advance.
Part 75a is brought into contact with the back plate 65b of the coil terminal mounting member 65, the part 75b is drawn out of the coil terminal mounting member 65 along the left side plate 65a of the coil terminal mounting member 65, and then the part 75c is connected to the control board. It is brought into contact with the left side surface portion of 23. Then, in this state, the screw 68 is inserted from the hole 75e of the portion 75a as shown in FIG. Then, the screw 68 is attached to the back plate 65 of the coil terminal mounting member 65.
Since it reaches the screw hole 22a formed in the control board holding member 22 through the hole 65d formed in b and the hole 23a formed in the control board 23, if the screw 68 is tightened in that state, one screw is formed. 68 controls the insulating member 75, the coil terminal mounting member 65, and the control board 23 from the control board holding member 22.
Will be fixed at the same time.

After that, the engaging portion 75d of the insulating member 75 is grasped with a finger and is folded behind the control board holding member 22 in the direction shown by the arrow in FIG. 4, so that the portions 75c and 75d of the insulating member 75 are separated. It is possible to prevent shaking. If folds for that purpose are further formed, the work becomes easier. Since the insulating member 75 is a sheet, it is not necessary to provide all the folds. Also,
By setting the height H of the insulating member 75 higher than the height of the side plate 65a, the insulating effect and the like can be further enhanced.

Further, although the insulating member 75 has been described as being attached to the screw for mounting the coil terminal mounting member 65, that is, the screw 68, it is a lead wire not shown as a component arranged in the vicinity of the control board holding member 22. The mounting member, the cooling fan 25, and the fin 2 as a heat sink
7 and of course, there are screws for attaching these parts, so that the insulating member 75 may be fixed by using these screws.

Since electrostatic resistance and insulation resistance can be improved by such means as well, it is possible to reduce the distance between the outer case 4 and the charging component without having to worry about the distance between the outer case 4 and the charging component. It is possible to make the container 1 compact. Further, since the insulating member 75 is attached by using a screw mainly used for other purposes near the charging part, a screw for attaching the insulating member 75, a hole for attaching the attaching screw, etc. No processing is required.

The invention of the present application is not limited to the configuration of the above-described embodiment, and it goes without saying that the design can be changed as appropriate without departing from the scope of the invention.

[0059]

According to the first aspect of the invention, in the microcomputer type rice cooker in which the outer case forming the outer wall is made of metal and various charging components are attached to the board vertically arranged, the outer case and the board are provided. By providing an insulating member between the rice cooker and the charging component, the design effect of the rice cooker can be enhanced and the rice cooker can be made compact. In addition, the insulating member enhances the insulating effect, and it is possible to reduce adverse effects on various electronic circuit elements on the board, and even if static electricity is discharged to the outer case by some external cause, the adverse effects on various electronic circuit elements on the board are still caused. It can be reduced. Furthermore, by forming the insulating member upright from the bottom member or hanging from the shoulder member, it is possible to simplify the molding and mounting by integrally forming it from an existing member.
When some force is applied to the outer case from the outside to the inside, the case can be prevented from being deformed.

According to the second aspect of the present invention, the insulating member is attached using the screw attached in the vicinity of the charging component, so that even if the insulating member is newly formed as a separate member, the attachment can be performed. , Other purposes have been the main purpose in the past, for example, since it is possible to use screws for mounting cooling fans and heat sinks, it is possible to reliably reduce the production cost as compared with the case where dedicated screws and screw holes are provided. You can

According to the invention of claim 3, the screw for attaching the insulating member is for attaching the substrate to the substrate holding member, so that the screw and the screw for exclusive use are the same as the effect of the invention according to claim 2. The production cost can be surely reduced as compared with the case where the holes are provided.

In the invention according to claim 4, among the charging parts to be mounted on the substrate, the tall part is provided in the direction of the bottom member, so that the bottom member is no matter how close the wall of the bottom member is to the wall of the bottom member. Since it is made of resin, it is possible to prevent the adverse effect that the parts are adversely affected.

According to the fifth aspect of the present invention, the charging component to be mounted on the substrate is mounted below the lower end of the metal outer case, so that the charging component to be mounted on the substrate is necessarily located near the resin bottom member. Therefore, similarly to the effect of the invention according to claim 4, it is possible to prevent the adverse effect that the component is adversely affected.

In the invention according to claim 6, since the insulating member can be formed integrally with the bottom member by providing the insulating member by extending the bottom member, as compared with the case where the insulating member is made separately. The molding and mounting thereof can be simplified, and the outer case can be prevented from being deformed when some force is applied to the outer case from the outside to the inside. Further, the mounting screw, which is indispensable when it is a separate body, becomes unnecessary, and the production cost can be reduced.

In the invention according to claim 7, the insulating member is provided by extending the substrate holding member, so that the insulating member is formed integrally with the substrate holding member, similarly to the effect of the invention according to claim 6. As compared with the case where the insulating member is made separately, its molding and mounting can be simplified, and the deformation of the outer case is prevented when some force is applied to the outer case from the outside to the inside. be able to. Further, the mounting screw, which is indispensable when it is a separate body, becomes unnecessary, and the production cost can be reduced.

In the invention according to claim 8, the boards are provided in parallel in the front-rear direction in the longitudinal direction, and the tall charging parts are provided on the inner board, so that the tall charging parts are separated from the metal outer case. Since they can be moved away from each other, the adverse effect on the component can be further reduced.

[Brief description of drawings]

FIG. 1 is an overall sectional view of a microcomputer type rice cooker to which an insulating member of the present invention is applied.

FIG. 2 is an overall sectional view showing a modified example of FIG.

FIG. 3 is an overall sectional view of a microcomputer type rice cooker to which an insulating member according to another embodiment of the present invention is applied.

FIG. 4 is an enlarged perspective view of a main part in which an insulating member according to still another embodiment of the present invention is applied to a coil connecting terminal mounting member.

5 is a cross-sectional view of the mounted state of FIG. 4 seen from above.

6 is a development view of the insulating member shown in FIG.

[Explanation of symbols]

1 ... Microcomputer type rice cooker 2 ... Container body 3 ... Lid member 4 ... Outer case 4a ... Horizontal part 4b ...
Vertical part 5 ... Inner case 6 ... Shoulder member 7 ... Handle 8 ... Bottom member 8e ... Intake port 8f ...
Leg 9 ... Heat insulation heater 10 ... Inner pot 11 ...
Seal material 12 ... Center sensor 13 ... Cord reel 13a ... Cord reel terminal 15 ... Front space 16 ... Operation board holding member 17 ... Operation board 18 ...
Operation panel 19 ... Switch button 20 ... Display device 22 ...
Control board holding member 23 ... Control board 24 ... Screw 25 ...
Cooling fan 27 ... Fins 31 ... Top lid 32 ...
Lower lid 33 ... Heat sink 34 ... Heater 35 ...
Inner cover 36 ... Vacuum heat insulating structure 37 ... Pressure adjusting lid 38 ...
Steam passage 39 ... Steam port 40 ... Hinge mechanism 41 ...
Lock member 45 ... Bottom coil 46 ... Corner coil 5
0 ... Shielding plate 60 ... Power supply board holding member 61 ... Power supply boards 62, 63 ... Electronic circuit element 65 ... Coil terminal mounting member 65a ... Side plate 65b ... Back plate 65c
... bottom plate 65d, 23a, 75e ... hole 65e, 22a ... screw hole 66 ... coil terminal 67, 68 ... screw 60a, 60b, 70, 75 ... insulating member 71 ... outer rib 72 ... inner rib

Claims (8)

[Claims] 1. A container body including an inner case forming an inner wall, a shoulder member forming an upper end portion, a metal outer case forming an outer wall, and a bottom member forming a bottom portion, and a container body which can be opened and closed with respect to the container body. A lid member, a heating means provided between the inner case and the bottom member, an operation panel including a display device and various operation buttons, and a board to which various charging components are attached and which is vertically arranged. A microcomputer type rice cooker provided, wherein an insulating member is provided between the metal outer case and the charging component of the substrate. 2. The microcomputer type rice cooker according to claim 1, wherein the insulating member is attached by using a screw attached in the vicinity of the charging component. 3. The screw is for attaching the substrate to a substrate holding member.
The described microcomputer rice cooker. 4. The microcomputer type rice cooker according to claim 1, wherein among the charging components attached to the substrate, tall components are provided in the direction of the bottom member. 5. The microcomputer type rice cooker according to claim 1, wherein the charging component attached to the substrate is attached below a lower end of the metal outer case. 6. The microcomputer type rice cooker according to claim 1, wherein the insulating member is provided by extending the bottom member. 7. The microcomputer type rice cooker according to claim 3, wherein the insulating member is provided by extending the substrate holding member. 8. The microcomputer type rice cooker according to claim 1, wherein the substrates are provided in a longitudinal direction in parallel in the front-rear direction, and a tall charging component is provided on the inner substrate.