JPH0898763A - Electromagnetic rice cooker - Google Patents

Abstract

PURPOSE: To realize the certain heat insulating structure of the shoulder part of the outer case supporting an inner pot, to enhance the support capacity of the inner pot and to eliminate revolution at the time of rice cooking. CONSTITUTION: In an electromagnetic rice cooker equipped with a container main body consisting of inner and outer cases 4, the work coils 7a, 7b provided to the rear surface of the inner case in the container main body and the inner pot 2 received in the inner case 3 in such a state that the upper edge part thereof is engaged with the outer case 4, an inner pot support member 84 having heat resistance and high in the coefficient of friction is provided to the shoulder part of the outer case 4 to support the inner pot 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inner pan support structure for an electromagnetic rice cooker.

[0002]

2. Description of the Related Art An electromagnetic heating type rice cooker (so-called IH jar) has been well known in the art, and an example thereof is disclosed in Japanese Patent Laid-Open No. 1-276584.

This electromagnetic rice cooker has a structure in which an inner pot is housed in a main body consisting of an inner case and an outer case. Usually, the inner pot has its entire upper edge portion on the shoulder of the outer casing on the main body side. It is adapted to be supported by being locked to the section.

[0004]

However, in the case of the electromagnetic rice cooker, since the inner pot itself generates heat, if such a supporting structure is adopted, the space between the upper case side shoulder portion of the outer case and the inner pot is increased. It is necessary to interpose some heat-resistant or heat-insulating member.

However, in such a case, the fixed state of the inner pot is inevitably bad, and there is a problem that the inner pot is apt to rotate or rattling due to the action of an external force when making rice.

The present invention has been made to solve such a problem, and realizes a heat insulating structure between the shoulder portion of the outer case and the inner pot at a simple and low cost, and at the same time, the inner pot is cooked during rice making. An object of the present invention is to provide an inner pan support structure of an electromagnetic rice cooker that enables reliable locking.

[0007]

In order to achieve the object, the present invention comprises the following problem solving means.

That is, the electromagnetic rice cooker of the present invention has a container body composed of an inner case and an outer case, a work coil provided on the lower surface side of the inner case in the container body, and an upper edge portion of which is a shoulder of the outer case. In an electromagnetic rice cooker comprising an inner pot that is locked in the inner part and housed in the inner case, an elastic inner pot support member having heat resistance and a high friction coefficient is provided on the shoulder portion of the outer case. The inner pot is elastically supported by the elastic inner pot supporting member.

Further, in the electromagnetic rice cooker of the present invention, in the constitution, a plurality of holes are provided in the shoulder portion of the outer case at predetermined intervals in the circumferential direction, and the elastic inner pot supporting member is provided. It is formed by a plurality of members that can be elastically fitted into the plurality of holes.

Further, in the electromagnetic rice cooker of the present invention, in each of the above-mentioned constitutions, the elastic inner pot supporting member is made of silicon rubber.

[0011]

Therefore, in the configuration of the electromagnetic rice cooker of the present invention, the following actions are realized corresponding to the above configurations.

That is, in the construction of the electromagnetic rice cooker of the present invention, first, the container body consisting of the inner case and the outer case, the work coil provided on the lower surface side of the inner case in the container body, and the upper edge portion are outside An electromagnetic rice cooker comprising an inner pot that is locked in the shoulder of the case and housed in the inner case, wherein the shoulder of the outer case is an elastic inner pot that has heat resistance and a high friction coefficient. A support member is provided, and the inner pan is supported via the elastic inner pan support member.

As a result, the inner pot is supported by the elastic inner pot support member having high heat resistance and high melting point in a state of being separated from the shoulder portion of the outer case, which may cause melting of the shoulder portion of the outer case. Does not occur.

Further, since the inner pot supporting member is made of a heat-resistant and elastic high-friction member, it has an effective friction (viscous friction) resistance against the rotation of the inner pot, and The rotation of the inner pot is surely suppressed even when the food to be cooked is taken out with Shamoji or the like. And since it has elasticity, it can be softly supported and has a high shock absorbing effect when the inner pot is stored.

Further, in the same construction, a plurality of holes are provided in the shoulder portion of the outer case at predetermined intervals in the circumferential direction, and the elastic inner pot support member can be elastically fitted into the plurality of holes. When formed by, it is possible to realize an elastic inner pot support portion having heat resistance and a function of suppressing rotation due to viscous friction at a lower cost without using many heat resistant and high friction members. Like Moreover, since the inner pot supporting member is elastic, it is possible to absorb a height error between the plurality of supporting portions, and more stable supporting becomes possible. Further, since it has elasticity and elastically fits into the plurality of holes, it is easy to install and can be replaced.

Further, in each of these configurations, when the inner pot supporting member is made of silicone rubber, a particularly effective rotation locking function is realized with appropriate elasticity.

[0017]

As a result of the above, according to the electromagnetic rice cooker of the present invention, the inner pot can be stably supported without rotating during rice making, and moreover, the inner pot and the outer case shoulder portion can be securely connected. It is possible to realize a simple and low-cost inner pot supporting structure capable of heat insulation.

[0018]

【Example】

(Embodiment 1) FIGS. 1 to 9 show the configuration of an electromagnetic rice cooker according to Embodiment 1 of the present invention.

First, the electromagnetic rice cooker 1 of the embodiment is configured to serve both rice cooking and heat retention, for example. And
For example, as shown in FIGS. 1 and 2, an inner pot (rice cooker) 2 made of stainless steel or the like capable of generating heat by an eddy current inside
The container main body includes a bottomed tubular inner case 3 made of a synthetic resin and a tubular outer case 4 supporting the inner case 3 so as to be able to set the above. A lid unit 5 is provided on the upper part of the container body so as to be openable and closable.

As shown in FIGS. 1 and 2, the bottom portion 3a of the inner case 3 is provided with concentric first and second ribs 91 and 92 near the outer periphery thereof. Rib 9
The first and second work coils 7a and 7b are configured to be fitted with each other at a predetermined interval by the first and second work pieces 1 and 92, and the work coils 7a and 7b are inserted through the first and second ribs 91 and 92, respectively. It is configured to be bonded to both the inner and outer radial bottom fitting surfaces by an adhesive.

The outer case 4 has a cylindrical cover portion 4a made of a synthetic resin plate, a synthetic resin shoulder portion 4b connected to the upper end of the cover portion 4a, and the cover portion 4a. The bottom portion 4c made of synthetic resin coupled to the lower end portion is formed into a cylindrical shape with a bottom so that a space portion 6 having a predetermined width is formed between the bottom portion 3a of the inner case 3 and the bottom portion 4c. In addition, as described above, the inner case 3 made of a synthetic resin and having a cylindrical shape with a bottom for supporting the inner pan 2 to be taken out is supported. The first and second ribs 91, 92 for partitioning the work coils 7a, 7b on the outer peripheral portion of the bottom portion 3a of the inner case 3
A thin portion 30 having a concave portion on the lower surface side is formed in a part of the space between them, and the lower surface 30a side of the thin portion 30 is composed of work coils 7a, 7b and a microcomputer during abnormal heating as described later. A thermal fuse 15 is provided to shut off the power to the rice cooker control unit. The work coil 7 is provided below the bottom 3a of the inner case 3.
The a and 7b and the coil base 8 are provided so as to be positioned in the vertical direction.

A control board 36 having power components such as a work coil control circuit is provided below the coil base 8.

The coil base 8 has a work plate supporting portion 8a having a saucer-shaped inner case supporting surface for supporting the work coils 7a and 7b, and the work coil supporting portion 8a.
It is composed of a ferrite core fitting groove 9, 9 formed on the upper side of the outer case bottom 4c and a leg portion 10, 10 provided at a lower portion of the work coil supporting portion 8. Supported by. On the outer peripheral surface of the side of the work coil supporting portion 8a of the coil base 8, a pair of vertical wall structures are provided on both sides of one end (outer peripheral end) of the ferrite core fitting groove 9, 9 ,. Spacers 11 and 11 are provided, and a ring-shaped magnetic shield plate 12 is fitted and fixed from the lower side to the outer periphery of the spacers 11 and 11 with a predetermined gap maintained therebetween.

Further, the ferrite core fitting grooves 9, 9
······································· is formed in a state of extending in the radial direction with a circumferential interval of 90 degrees therebetween, and also penetrating in the vertical direction. • is fitted.

Further, an opening having a predetermined diameter is formed in a portion of the coil base 8 corresponding to the thin portion 30 of the inner case bottom portion 3a, and the work coil supporting portion 8 is provided above the opening through the opening. The thermal fuse holder 14 having an H-shaped cross section is detachably attached to the bottom of the inner case 3 by the thermal fuse holder 14 and the cylindrical thermal fuse 15 is inserted into an insulating tube. The thin wall portion 30 is supported so as to be in contact with the lower surface 30a.

That is, the thermal fuse holder 14 has a H-shaped cross section, and the thermal fuse 1 is provided in a recess 14a on the upper end of the holder portion.
5 and also, a part of the lower side wall portion is bent outward in the horizontal direction to attach it to the lower surface of the coil base 8 14b.
By attaching the mounting portion 14b to the lower surface of the coil base 8 with a screw, the mounting portion 14b is detachably fixed from the lower side.

On the other hand, the inner case 3 has a bottom portion 3a and a side wall portion 3b which are integrally molded, and the center portion of the bottom portion 3a and the center portion of the work coil supporting portion 8a of the coil base 8 are vertically and concentrically penetrated. A storage space (fitting hole) 17 for the center sensor 16 is formed. The center sensor storage space 17 can be vertically moved up and down and is constantly urged upward by a coil spring 18. A center sensor 22 for detecting the set state of the inner pot is provided.

The center sensor accommodating space 17 is formed in a cylindrical body 19 formed by a rib extending vertically in the central portion of the coil base 8, and a sensor cover 20 is fitted in the lower opening thereof. The screws 21 are fixed to the pressure wall portion on one side of the coil base 8 side tubular body 19 with screws 21.

In the center sensor 22, for example, a temperature fuse for detecting an abnormal temperature is not provided in the sensor holding portion 94 at the upper end of the cylindrical sensor holder 22a,
First and second thermistors (temperature sensors) 23, 2 for detecting the temperature of the inner pot 2 which is considerably smaller than the temperature fuse.
4 is provided in parallel with the central portion, and a small diameter sensor holding portion in which only the small first and second thermistors 23 and 24 are provided on the upper surface of the sensor holding portion 94 at the upper end portion of the sensor holder 22a. A sensor cap 25 made of a metal material having a small diameter enough to cover 94 and having good thermal conductivity is fitted and fixed integrally. A ring-shaped shield member 93 provided with a shield lip portion 93a in the circumferential direction is fitted to the lower portion of the upper side edge portion 26 of the cylindrical sensor holder 22a, and the shield member 93 and the lower sensor cover are fitted. The entire sensor holder 22a is supported by a coil spring 18 which is interposed between the sensor holder 22a and the lid surface 27, and is always urged upward so as to come into contact with the bottom portion 2a of the inner pot 2.

Sensor holder 9 in the sensor holder 22a
The lower part of 4 extends downward by a predetermined length in a rectangular tube shape to form a reed switch mounting portion 96 at the lower end thereof, while the lower sensor cover 20 is formed with a cylindrical magnet mounting portion 95. . Then, the magnet 28 attached to the magnet attaching portion 95 and the reed switch 29 attached to the reed switch attaching portion 96 are brought into contact with and separated from each other according to the ascending / descending operation of the sensor holder 22a.
The reed switch 29 is turned on and off, and the on,
The OFF signal detects whether the inner pot 2 is not set or set. Reference numeral 34 denotes an ascending position regulating edge portion of the sensor holder 22a of the inner case bottom portion 3a. The edge portion 34 is erected above the upper surface of the inner case bottom portion 3a by a predetermined height, and the sensor storage space portion is provided. It is made difficult for water and the like to enter the inside of 17.

On the other hand, on the side of the shoulder portion 4b of the outer case 4 opposite to the hinge mechanism 40, an operation panel 70 constituting an operation portion is provided. As shown in FIG. 3, the operation panel 70 includes various switches 6 necessary for cooking rice.
1,62a, 62b, 62c, 71,72,73,74 and rice cooked menu selected by each of those switches, timer set time, reservation, fuzzy rice cooked, reheat, heat retention / cancellation, etc. are displayed and used. A liquid crystal display unit 75 is provided for making it visible to a person.

In this embodiment, as shown in detail in FIG. 7, the shoulder portion 4b and the cover portion 4a of the outer case 4 are provided.
Is integrally formed of synthetic resin, and the operation panel 70 is provided on the operation panel mounting surface portion 120 of the front surface of the cover portion 4a of the outer case 4. The operation board 10 for the operation panel 70 is provided on the back side thereof.
0 and the operation board cover 101 are attached as follows.

That is, first, the operation board cover 101 is provided.
7 is an enlarged view of FIG. 7 and FIG. 8, the operation panel mounting surface portion 120 of the front portion of the cover portion 4a of the outer case 4 is shown.
The inner frame 102 and the cover 4a which are integrally formed via the liquid retaining portion 82 on the lower inside of the shoulder 4b.
The box-shaped structure with a shallow bottom fitted from the lower side into the operation board housing space 103, which is formed between the operation panel mounting surface section 120 and is narrowed in a generally trapezoidal shape toward the upper side. Has become.

On the left and right sides of the bottom plate portion of the upper side 101a, engaging pieces 105 protruding upward by a predetermined length are provided respectively, while the outer case 4 is provided in the middle of the lower side bottom plate portion.
Cylindrical fastening bosses 106a and 106b with the side cover 4a
Are located on both left and right sides.

On the other hand, the operation panel mounting surface portion 120 of the outer case 4 side cover portion 4a is a shallow concave portion as a whole. For example, as shown in FIG.
A display window 175 corresponding to the liquid crystal display element on the operation substrate 100 (not shown in FIG. 7) housed and fixed in the unit 1 and a press corresponding to the operation rods of the above-described various operation switches 61, 62a to 62c, 71 to 74. Operation ports 161, 162a to 162c,
171 to 174, a large-diameter substrate spacer corresponding to the fastening boss portions 106a and 106b of the operation substrate cover 101, and screw screw insertion holes 111a and 111b are formed.

Further, on the upper portion (inside the shoulder portion) of the vertical wall portion 102a in the operation board storage space portion 103 which is continuous with the front end portion of the shoulder portion 4b of the outer case 4 and the front surface portion of the inner frame portion 102, A recessed groove portion 113 that is recessed inside the upper portion of the shoulder portion 4b is formed, and the engagement piece 10 on the operation board cover 101 upper side 101a side is formed in the recessed groove portion 113 as illustrated.
5 is smoothly engaged upward without rattling through the first and second tapered surfaces (guide surfaces) 102b and 102c of the vertical wall portion 102a.

Therefore, in this structure, for example, in the assembled state in which the outer case 4 is turned upside down, the operation board cover 101 to which the operation board 100 is fixed is inserted into the operation board cover storage space 103 from the upper side 101a side. When the operation board cover 101 is inserted into the upper side 1
01a side is the first tapered surface 102b of the vertical wall portion 102a.
While being guided by the engaging piece 105, the engaging piece 105 is moved to the inside of the shoulder portion 3b and the second tapered surface 102c of the concave groove portion 113 side.
First, the upper end side is accurately positioned in the state of being completely inserted and engaged through. Therefore, in this state, the fastening boss portion 106 is inserted from the screw screw insertion holes 111a and 111b of the operation panel mounting surface portion 120 of the outer case 4 side cover portion 4a through the board spacers 115a and 115b having the illustrated shapes.
When screw screws 116a and 116b are screwed into a and 106b and fastened (see FIG. 8), the operation board cover 101 is accurately fixed to both left and right ends as shown (with the operation board 100 stored and fixed). Finally, a flexible nameplate seal 117 may be attached to the operation panel mounting surface 120 of the outer case 4 side cover 4a as shown in FIG.

As described above, in the mounting structure of the operation board cover, the operation board cover storage space 103 does not have any uneven surface portion and the first wall portion 102a of the vertical wall portion 102a serves as a guide rib having a guide function at the time of insertion. 1, second tapered surface 1
Only by pushing along 02b and 102c, the final positioning can be accurately realized. Therefore, the assembling work is significantly facilitated. Further, since it is not necessary to form a slide structure on the mold at the time of molding, the cost is further reduced.

On the other hand, in this embodiment, for example, as shown in FIG. 1, the inner pot supporting portion for supporting the upper edge portion 2b of the inner pot 2 is integrally molded with the cover portion 4a of the outer case 4 described above. An edge portion 83 having an inverted U-shaped cross section of a vertical wall portion provided inside the formed shoulder portion 4b via a liquid retaining portion 82 and engaged with an upper edge portion of the side portion 3b of the inner case 3. It is composed of parts. And in this structure, in order to prevent melting of the same edge portion 83 inside the shoulder portion 4b due to the temperature rise of the inner pot 2, as shown in FIGS. The inner case support member fitting portions 85, 85, ... Are provided, and the inner pot support member fitting portions 85, 85 ... Have a high melting point, which is a separate member, have elasticity, and have a high friction coefficient. Inner pot support member (eg heat resistant silicone rubber) 84,84 ...
Is detachably attached by elastically fitting from the upper side, and the upper edge portion 2b of the inner pot 2 is supported from the lower side via the inner pot supporting members 84, 84. 2 and the structure in which the inner pot locking edge portion 83 of the outer case side shoulder portion 4b made of a synthetic resin having a relatively low melting point, which emphasizes appearance, are not in direct contact with each other.

The inner pot supporting members 84, 84 ...
For example, as shown in FIG. 5, a rectangular head portion 84a having a large diameter that is elastic and capable of slightly elastic deformation and has a high frictional force, and a width having engaging portions 86, 86 on both side portions in the circumferential direction are provided. While having a pin-shaped structure having a wide prismatic small-diameter leg portion 84b, inner pot supporting member fitting portions 85, 85 on the inner pot engaging edge portion 83 side of the outer case shoulder 4b. In order to attach the inner pot supporting members 84, 84 ... Of the structure, a part of the edge portion 83 bent in the inverted U-shape in section as described above is projected upward by a predetermined height and the width thereof is increased in the radial direction. A widened trapezoidal flat portion 85a is formed, and a fitting hole (hole) 85b of the leg portion 84b of the inner pot supporting member 84 is formed in the flat portion 85a. As shown in FIG. 4, a plurality of (for example, four) inner pot supporting member fitting portions 85, 85, ... With the fitting holes 85b formed therein are provided at predetermined intervals in the circumferential direction.
Then, the leg portion 84b of the inner pot supporting member 54 is fitted into the fitting hole 85b of the inner pot supporting member fitting portion 85, and the legs 84b of the inner pot supporting member 54 are locked by the engaging portions 86, 86 so that the fitting is substantially impossible. Fixed in the state. In this case, the inner pot support member 84
A vertically long slit 87 is formed in the central portion between the engaging portions 86, 86 of the leg portion 84b so that the leg portion 84b can be smoothly fitted into the fitting hole 85b. The engaging portions 86, 86 are designed so that they can be compressed and deformed inward. In addition, this also makes it easy to take out when replacing.

As a result, the inner pot 2 is supported by the high-melting inner pot supporting members 84, 84 in a state of being separated from the inner pot engaging edge portion 83 inside the shoulder portion 4b of the outer case 4. Therefore, there is no risk of melting the inner pan locking edge portion 83.

The inner pot supporting members 84, 84 ... Are made of a material having a high friction coefficient such as silicon rubber, which has heat resistance, elasticity, and high viscous friction.
This provides an effective frictional resistance to the rotation of the inner pan 2 and more reliably prevents the inner pan 2 from pivoting when the cooked food in the inner pan 2 is taken out with chamoji or the like. Further, since it has elasticity, it is possible to buffer the impact force when the inner pot is stored, and the metallic noise when sliding the inner pot does not occur. Further, even if there are height errors due to dimensional accuracy among the plurality of support portions, stable support can be achieved by absorbing them. Further, since the slits 87 are formed on the leg portions 84b, elastic deformation is possible not only as a whole but especially in the width direction, and forcible fitting is easy.

On the other hand, the lid unit 5 has a synthetic resin outer cover 37 constituting the outer peripheral surface thereof, and the outer cover 37.
The inner pot 2 of the lid unit 5 fitted inside the outer peripheral edge of the
Is formed in a hollow structure by an inner frame portion 38 made of synthetic resin and a heat radiating plate 57 fitted in the inner frame portion 38, which constitutes an engaging portion to the outer cover 37 and the heat radiating plate 57. Is
The outer peripheral edge portions are coupled to each other via the inner frame portion 38. The lid unit 5 is rotatably attached to the shoulder portion 4b of the outer case 4 via a hinge mechanism 40, and its open end side is engaged with a predetermined position of the lid unit 5. A lock lever 39 for opening and closing the lid unit 5 is provided.

Further, in the substantially central portion of the lid unit 5,
The vapor discharge port 43 is formed so as to penetrate vertically.
A rubber packing 45 is attached to the vapor discharge port 43.
Are fitted and the vapor discharge cylinder 44 is attached via the packing 45.

(Embodiment 2) In the above embodiment, the inner pot supporting member 84 is formed of a solid type in order to facilitate fitting into the fitting hole 85b on the shoulder 4b side. The slit 87 is formed on the leg portion 84b,
It is also possible to form the inner pan support member 84 (particularly the leg portion 84b thereof) of a hollow type. By doing so, elastic deformation becomes easier, and it is not always necessary to form the slit 87 on the leg portion 84b as described above.

[Brief description of drawings]

FIG. 1 is a central vertical cross-sectional view showing a configuration of an electromagnetic rice cooker according to a first embodiment of the present invention, which is cut left and right at a central portion in the front-rear direction.

FIG. 2 is a central longitudinal cross-sectional view of the electromagnetic rice cooker cut in the front-rear direction at the center portion in the left-right direction.

FIG. 3 is a front view of the electromagnetic rice cooker.

FIG. 4 is a plan view of the electromagnetic rice cooker with a lid unit removed.

FIG. 5 is an enlarged exploded perspective view of an inner pot support member fitting portion of the electromagnetic rice cooker.

FIG. 6 is an enlarged cross-sectional view (A-A cross-sectional view of FIG. 4) of the inner pot support member fitting portion of the electromagnetic rice cooker.

FIG. 7 is an enlarged cross-sectional view of an operation panel unit of the electromagnetic rice cooker.

FIG. 8 is an enlarged horizontal sectional view of a right side portion of an operation panel portion of the electromagnetic rice cooker.

FIG. 9 is an enlarged front view of a main part of an operation panel section of the electromagnetic rice cooker.

[Explanation of symbols]

1 is an electromagnetic rice cooker, 2 is an inner pot, 3 is an inner case, 3a is an inner case bottom, 4 is an outer case, 4b is an outer case shoulder, 5 is a lid unit, 7a and 7b are work coils, 8 is a coil stand , 8
3 is an inner pot locking edge, 84 is an inner pot support member, and 85 is an inner pot support member fitting part.

Claims (3)

[Claims] 1. A container body composed of an inner case and an outer case, a work coil provided on the lower surface side of the inner case in the container body, and an upper edge portion of which is locked to a shoulder portion of the outer case to form the inner portion. An electromagnetic rice cooker comprising an inner pot housed in a case, wherein an elastic inner pot support member having heat resistance and a high friction coefficient is provided on a shoulder portion of the outer case, and the elastic inner pot support member is provided. An electromagnetic rice cooker characterized by supporting the inner pot via the. 2. A plurality of members in which a plurality of holes are provided at predetermined intervals in the circumferential direction in the shoulder portion of the outer case, and an elastic inner pot support member can be elastically fitted in the plurality of holes. The electromagnetic rice cooker according to claim 1, wherein the electromagnetic rice cooker is formed of: 3. The electromagnetic rice cooker according to claim 1, wherein the elastic inner pot support member is made of silicon rubber.