JP3511618B2 - rice cooker - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rice cooker such as a warming pot, and more particularly to the structure of a lid.

[0002]

Conventionally, in a rice cooker having a removable inner lid, a lid temperature sensor as a temperature detecting means for detecting the temperature of the inner lid is provided on the lid, and the lower surface of the lid is formed. There is one in which the temperature sensor is made to protrude from a through hole formed in the lower surface member of the lid body and the heat-sensitive portion thereof is brought into contact with the inner lid. The lid temperature sensor is biased by a spring so that the heat-sensitive portion of the lid temperature sensor surely contacts the inner lid. In the conventional rice cooker of this type, when the lid temperature sensor was incorporated into the lid during manufacturing, the spring had to be supported by hand, which was troublesome. Also, the lid temperature sensor can rotate freely, so
When the lid temperature sensor is rotated with the inner lid removed, there are problems that the wiring of the lid temperature sensor is entangled or the heat-sensitive portion is inclined and accurate temperature detection cannot be performed.

The present invention is intended to solve such a problem, and provides a rice cooker which is inexpensive, can easily incorporate the temperature detecting means in manufacturing, and can improve the reliability of the temperature detecting means. The purpose is to

[0004]

In order to achieve the above object, the rice cooker according to the invention of claim 1 has a rice cooker main body, a container accommodated in the rice cooker main body, and an upper side of the rice cooker main body. And a lid body that is openable and closable, and an inner lid that covers the upper opening of the container is provided below the lid lower surface member that forms the lower surface of the lid body. A temperature detecting means for detecting the temperature of the inner lid, which is provided inside the lid body and has a hole formed therein, is projected from the through hole of the lid lower surface member so that the heat-sensitive portion of the temperature detecting means is elastically attached to the inner lid. In the rice cooker brought into contact, the temperature detecting means is provided with an elastic body holding portion which also functions as a rotation preventing mechanism of the heat sensitive portion and presses the heat sensitive portion against the inner lid side, and a cutout portion formed in the lid body.
By hitting the elastic body holding portion,
It is configured to prevent rotation .

At the time of manufacturing, when the temperature detecting means is attached to the lid, since the elastic body can be held by the elastic body holding portion, it is not necessary to manually support the elastic body. Further, when the temperature detecting means is attached to the lid, it is formed on the lid.
The cutout portion and the elastic body holding portion come into contact with each other, and the elastic body holding portion prevents the temperature detecting means from rotating. Therefore, with the inner lid removed, even if the user tries to pinch and rotate the protruding heat-sensitive part of the temperature detecting means, the temperature detecting means does not rotate,
It is possible to prevent the wiring to the temperature detecting means from being entangled and the heat-sensitive portion from tilting. Moreover, since a separate rotation prevention unit is not required, the structure has no waste and the cost can be reduced.

According to a second aspect of the invention, in the rice cooker according to the first aspect of the invention, a packing for closing the through hole and the heat sensitive portion of the lid lower surface member is provided around the outer periphery of the heat sensitive portion. The elastic member is elastically deformed up and down as the part moves up and down, and the elastic force of the elastic member is weaker than the elastic force of the elastic body that elastically abuts the heat sensitive part on the inner lid.

The packing prevents water from entering the inside of the lid through the gap between the through hole of the lid lower surface member and the heat-sensitive portion. Moreover, since the packing is made of an elastic member that is elastically deformed up and down as the heat-sensitive part moves up and down, even if rice grains are sandwiched between the heat-sensitive part and the inner lid, the heat-sensitive part is slightly inclined, The gap between the through hole and the heat sensitive portion is surely closed. Further, the elastic force of the elastic member forming the packing acts in the direction of separating the heat-sensitive portion of the temperature detecting means from the inner lid, but the packing is more elastic than the elastic force of the elastic body that elastically abuts the heat-sensitive portion on the inner lid. By weakening the elastic force of the elastic member formed, the heat-sensitive portion surely contacts the inner lid.

[0008]

DETAILED DESCRIPTION OF THE INVENTION An embodiment of the rice cooker of the present invention will be described below with reference to FIGS. Reference numeral 1 denotes a rice cooker main body, and the rice cooker main body 1 has an outer shell formed by an outer frame 2 and a bottom plate 3 covering an opening on the lower surface thereof, and an inner frame 5 forming a pot housing portion 4 is provided inside. . 6 is a pot housing section 4
This pot is a pot that is a container that can be inserted and removed freely.
The handle portion 7 formed in a flange shape around the upper opening is placed on the upper edge of the pot accommodating portion 4 to be supported in the pot accommodating portion 4. A heating element 8 made of magnetic metal for electromagnetic induction heating is provided on the lower portion of the outer surface of the pot 6. A heating coil 10 serving as heating means for heating the heating element 8 of the pot 6 by electromagnetic induction heating is provided outside the inner frame 5, and the heating coil 10 is provided by a coil cover 11. It is covered from the outside. Further, a pan temperature sensor 12 that elastically contacts the bottom surface of the pan 6 is provided in the center of the lower part of the inner frame 5.
This pan temperature sensor 12 detects the temperature of the pan 6,
As a result, heating by the heating coil 10 or the like is controlled. In the rear part of the rice cooker body 1, a cord reel 13 for winding the power cord and a power board 14 are provided.
A blower 15 is provided for cooling the electric components that generate heat. Reference numeral 16 is a cover member for closing the opening formed in the rear surface portion of the outer frame 2 for the purpose of facilitating the wiring work. Further, 17 is a rotatable handle for carrying.

Reference numeral 21 denotes a lid body provided on the upper side of the rice cooker body 1 so as to be openable and closable. The lid 21 is an outer lid 22, an inner cover 23 fixed to a lower side of the outer lid 22, and a lid lower surface member fixed to a lower side of the inner cover 23 and forming a lower surface of the lid 21. The heat radiating plate 24 and the outer lid cover 25 fixed to the upper side of the outer lid 22 are the main components.

An inner lid 31 is detachably attached to the lower surface of the lid body 21 so as to form a predetermined gap a between it and the upper surface of the pot 6 to directly cover the upper opening. This inner lid 31
An annular lid packing 32 is fixed together with an annular packing holder 33 to the outer peripheral portion of the. The lid packing 32 is made of an elastic member, and when the lid body 21 fitted with the inner lid 31 is closed,
It is in close contact with the handle portion 7 of the pan 6 housed in the rice cooker body 1. The inner lid 31 is the packing holder.
By engaging the engagement receiving portion 34 formed on 33 with the locking portion 35 formed on the outer peripheral portion of the inner cover 23 of the lid 21,
It can be attached to the lid 21.

The lid 21 has a rear portion of an inner cover 23 rotatably supported on a rear upper portion of the outer frame 2 by a hinge shaft 41, and a hinge wound around the hinge shaft 41. A force in the opening direction is applied by the spring 42. A clamp 43 is pivotally attached to the upper front portion of the outer frame 22, and an engagement receiving portion 44 with which the clamp 43 is engaged is formed in the front portion of the packing holder 32 of the inner lid 31. That is, the clamp 43 is engaged with the engagement receiving portion 44 of the inner lid 31 attached to the lid 21, so that the lid 21 is held in the closed state against the force of the hinge spring 42. Has become.

A first recess 51, which is recessed at the upper side, is formed in the front portion of the outer lid 22, and the first recess 51 is covered with the outer lid cover 25 in a storage space 52. A display substrate 53 having a display is mounted. Also, storage space
Various switches 54 are mounted on the outer lid cover 25 above 52. Further, an operation panel 55 is fixed on the outer lid cover 25 so as to cover the various switches 54. A transparent window portion 56 is provided on the operation panel 55 so that the display device on the display substrate 53 can be seen.

Further, a second recess 61 which is recessed at the upper side is formed at the rear portions of the outer lid 22 and the outer lid cover 25,
A steam port 62 for releasing steam generated in the pot 6 is detachably attached to the second recess 61. This steam port 62
Is connected to the inside of the pot 6 through a steam passage 63 formed of openings formed in the outer lid 22, the inner cover 23, the heat dissipation plate 24, and the inner lid 31, respectively. Further, in order to prevent the steam from leaking from the steam passage 63, the outer lid 22 and the inner lid 31 are provided with steam port packings 64 and 65, respectively.

The material of the outer lid 22 and the inner cover 23 is plastic, but the material of the heat dissipation plate 24 is 0.3 to
This is a member formed by pressing an aluminum plate such as A1050 of 0.6 mm into a predetermined shape and then forming an alumite coating. The thickness of this alumite coating is 1 to 8 μm, preferably 3 to 5 μm. Further, the material of the inner lid 31 detachably provided below the heat dissipation plate 24 is an austenitic stainless steel member which is a non-magnetic material excellent in corrosion resistance such as SUS304 having a material thickness of 0.3 to 0.6 mm. Although the heat sink 24 and the inner lid 31 are not in contact with each other, the gap a between the heat sink 24 and the inner lid 31 is 5 mm or less, preferably 3 mm or less. 31 is close. Also,
The inner lid 31 is formed to have a flat shape on the whole or to have a surface shape protruding toward the pot 6 side on average. Note that, for example, the concave portion 66 is provided on the surface of the inner lid 31 near the vapor port packing 65, but such a partial concave portion 66 may be provided. On the other hand, the heat radiating plate 24 has a shape similar to the back surface of the inner lid 31, and the inner lid 31 and the heat radiating plate on the front surface portion.
The gap a between the holes 24 and 24 is almost uniform.

A lid heater 71, which is an electrothermal heater such as a cord-shaped heater as a heating means, is provided on the rear surface of the heat dissipation plate 24 in contact with this surface. The lid heater 71 is located in a substantially sealed space 72 between the heat dissipation plate 24 and the inner cover 23. The steam port
A communication passage 73 is formed in the inner cover 23 near 62, and the space 72 communicates with the gap 74 between the outer lid 22 and the inner cover 23 by the communication passage 73.

Further, the lid body 21 is provided with a lid temperature sensor 80 which is a temperature detecting means for detecting the temperature of the inner lid 31. Next, the configuration of the lid temperature sensor 80 will be described. The inner cover 23 located inside the lid 21 is formed with an assembling hole 81.
A substantially cylindrical sensor casing 82 of the lid temperature sensor 80 is incorporated so as to be vertically movable within a predetermined range. That is, a pair of locking portions 83 formed by projecting upward from the sensor casing 82 are inserted into the assembling hole 81 from the lower side, that is, the inner lid 31 side. A pawl portion 84 is formed on the upper end of each locking portion 83, and the pawl portion 84 engages the inner cover 23 from above to prevent the sensor casing 82 from coming off. . Further, the sensor casing 82
A heat-sensitive portion 85 is provided outside at the end portion of the inner lid 31 side, and a temperature detecting element 86 is provided inside the heat-sensitive portion 85. On the other hand, the heat dissipation plate 24 is formed with a through hole 87 having a diameter of about 10 to 16 mm, and the heat-sensitive portion 85 projects from the through hole 87 and comes into contact with the back side surface of the inner lid 31. ing.
The outer diameter of the heat sensitive portion 85 is about 8 to 9 mm, and a gap of 1 mm or more is secured between the heat sensitive portion 85 and the peripheral edge of the through hole 87. This is because the heat-sensitive part 85 touches the heat sink 24 and the lid temperature sensor
This is to prevent erroneous detection of the temperature of the inner lid 31 due to the fact that 80 detects the heat of the heat dissipation plate 24.

The material of the heat sensitive portion 85, which is the exterior of the lid temperature sensor 80 in contact with the inner lid 31, is the same as that of the inner lid 31. In this rice cooker, since the inner lid 31 is made of stainless steel, the heat-sensitive part 85 is also made of stainless steel. When stainless steel is used as the material of the heat-sensitive part 85 in this way, since stainless steel has poorer thermal conductivity than aluminum, in order to solve the problem of deterioration of thermal conductivity and ensure good temperature detection accuracy, It is preferable to reduce the thickness to about 0.1 to 0.5 mm. If the inner lid 31 is made of aluminum, it is preferable that the heat sensitive portion 85 is also made of aluminum.

The inner cover 23 is surrounded by the built-in hole 81.
A spring accommodating portion 91 formed of an annular concave portion opening to the inner lid 31 side is formed in the. This spring compartment 91
Is for accommodating a sensor spring 92 as an elastic body that presses the heat sensitive portion 85 of the lid temperature sensor 80 against the inner lid 31 elastically. In addition, around the built-in hole 81,
A pair of slit-shaped notches 93 are formed. On the other hand, on the outer peripheral portion of the sensor casing 82, a flange portion 94 that holds the lower end that is one end of the sensor spring 92 is formed. Further, the sensor spring 92 is sandwiched between the inner cover 23 and the flange portion 94, whereby the heat-sensitive portion 85
A force is applied to push the inner lid 31 against the inner lid 31. In addition, the sensor casing 82 has a pair of spring holding portions 95 as elastic body holding portions that are projected upward similarly to the locking portion 83.
Are formed. These spring holding portions 95 are located so as to sandwich the sensor spring 92 from the outside. Along with this, the upper end of the spring holding portion 95
The claw portion 96 that holds the upper end that is the other end of the sensor spring 92 before the manufacturing cover temperature sensor 80 is assembled to the inner cover 23.
Are formed. After the lid temperature sensor 80 is assembled to the inner cover 23, the other end of the sensor spring 92 is held by the inner cover 23 as described above. Further, the both spring holding portions 95 are located in the both cutout portions 93 and also serve as a rotation preventing mechanism for the sensor casing 82 including the heat sensitive portion 85. That is, the side surface 93a of the cutout portion 93 and the side surface 95a of the spring holding portion 95 come into contact with each other, so that the sensor casing 82 is prevented from rotating.

Further, between the heat radiating plate 24 and the outer periphery of the heat sensitive portion 85 of the sensor casing 82, a sensor which is an annular packing that closes the outer surface of the heat sensitive portion 85 and the through hole 87 of the heat radiating plate 24. Packing 97 is provided. This sensor packing 97
Is made of an elastic member such as silicone rubber, and has a substantially V-shaped cross section so that it can be elastically deformed vertically as the sensor casing 82 including the heat-sensitive portion 85 moves vertically to maintain waterproofness. The elastic force of the sensor packing 97 is about 0.1 ~
0.2 kgf, the elastic force of the sensor spring 92 is about 0.25 to 0.45 kg
f, and the elastic force of the sensor packing 97 is about half the elastic force of the sensor spring 92.

Next, the operation of the above configuration will be described. At the time of rice cooking, a pot 6 containing rice and water is housed in the pot housing portion 4 of the rice cooker body 1, and the lid body 21 having the inner lid 31 attached is closed. Then, the high frequency current is supplied to the heating coil 10 to electromagnetically heat the pot 6 to cook rice. After cooking rice, the pan 6 is heated by electromagnetic induction heating by supplying a high-frequency current to the heating coil 10, and the rice in the pan 6 is kept warm.

Further, the inner lid 31 is heated by the lid heater 71 at the time of cooking rice and keeping the temperature constant, so that dew condensation on the inner lid 31 is prevented. The heating adjustment of the lid heater 71 is performed according to the temperature of the inner lid 31 detected by the lid temperature sensor 80. When the lid heater 71 heats the inner lid 31, the lid heater 71 directly heats the radiator plate 24, and the inner lid 31 is heated by the radiant heat from the surface of the radiator plate 24.

Since the heat dissipation plate 24 is made of aluminum, it has good thermal conductivity, and since it is formed with an alumite coating, the radiation efficiency of infrared rays is improved. Therefore, the heat sink
The heat generated by the lid heater 71 on the back side of the 24 is quickly and satisfactorily diffused over the entire radiator plate 24, and further radiated to the inner lid 31 side. As a result, heat is supplied to the inner lid 31 which is made of stainless steel having relatively poor thermal conductivity and is apt to be locally heated, so that the heat is uniformly supplied to the inner lid 31. To be done.

Further, the gap a between the heat dissipation plate 24 and the inner lid 31 is reduced to 5 mm or less, preferably 3 mm or less to bring the heat dissipation plate 24 and the inner lid 31 close to each other, so that the radiation from the heat dissipation plate 24 is performed. Heat is more efficiently supplied to the inner lid 31. Also, the heat sink
Since the 24 and the inner lid 31 are not in contact with each other and there is no local contact portion, only the contact portion is prevented from being locally heated, and uneven heating of the inner lid 31 is further suppressed.

As described above, although the inner lid 31 is made of stainless steel, the radiator plate 24 by the electrothermal lid heater 71 is formed.
Since the radiant heat from the inner lid 31 is uniformly radiated to almost the entire inner lid 31, the inner lid 31 can be efficiently and uniformly heated. Therefore, the energy saving property is also improved, and it is possible to prevent the problem that the inner lid 31 is partially cooled to a low temperature at the time of rice cooking and heat retention, and a large amount of dew condensation is locally generated, and the usability is improved. Moreover, the electrothermal lid heater 71 can have a simple structure and can be inexpensive.

When aluminum and another metal are brought into contact with each other and used for a long time in the presence of water, the other metal exhibits a potential higher than the pitting corrosion potential of aluminum, which promotes the pitting corrosion phenomenon of aluminum. It is known.
The heat-sensitive part of the temperature sensor is preferably made of aluminum, which originally has good thermal conductivity, and is often used.However, when the inner lid 31 is made of stainless steel as in this rice cooker, moisture surely exists in the rice cooker, so The electrolytic corrosion may occur in the heat-sensitive part 85 made of aluminum of the lid temperature sensor 80 that comes into contact with the lid 31. On the other hand, the inner lid 31 of the lid temperature sensor 80
If the material of the heat-sensitive part 85, which is the exterior that contacts with, is stainless steel, which is the same material as the inner lid 31, the occurrence of electrolytic corrosion in the heat-sensitive part 85 can be prevented. Therefore, stable temperature detection can be performed even after long-term use, and it is possible to prevent the inner lid 31 from being overheated or underheated during rice cooking or heat retention. Also, stainless steel has relatively poor thermal conductivity, and
Although the heat conduction to the temperature detection element 86 inside the 85 is delayed, the temperature detection accuracy may be deteriorated.However, by making the plate material forming the heat-sensitive part 85 a thin plate with a thickness of about 0.1 to 0.5 mm, You can improve your sex. Since stainless steel has higher strength than aluminum, it has an advantage that it can be made thinner.

By the way, when aluminum is used as the material of the inner lid 31, generally, an alumite coating or a fluorine coating is applied to the surface in order to prevent corrosion, but since the alumite coating or the fluorine coating absorbs light. ,
Even if the lid 21 is left open at the store or at home, it is difficult for sunlight to reflect. On the other hand, when the inner lid 31 is made of stainless steel like a rice cooker, light is reflected on the surface, and if the reflected light is collected, the light collecting part becomes hot. There's a problem. However, since the surface shape of the inner lid 31 is slightly projected to the pot 6 side, there is no problem that the condensing part becomes hot due to diffuse reflection of sunlight. The surface of the inner lid 31 does not necessarily have to project entirely, and the object can be achieved as long as the shape is such that the entire surface is substantially flat on average or projects toward the pot 6. For example, as in the first modified example shown in FIG. 4, the second modified example shown in FIG. 5, and the third modified example shown in FIG. 6, there may be a partial recess 101 or step 102 on the surface, As in the fourth modified example shown in FIG. 7, the fifth modified example shown in FIG. 8, and the sixth modified example shown in FIG. 9, there may be a plurality of dimple-shaped irregularities 103. 4 to 9, the lower side in the figure is the surface side of the inner lid 31.

Further, since the lid temperature sensor 80 is provided with the flange portion 94 which holds one end of the sensor spring 92, and the spring holding portion 95 which holds the other end of the sensor spring 92, the lid temperature sensor is manufactured. Before attaching the 80 to the built-in hole 81 of the inner cover 23, the sensor spring 92 together with the flange 94 is covered by the spring holding portion 95.
Since it can be held at 80, it is not necessary to support the sensor spring 92 by hand. Therefore, the lid temperature sensor 80
Can be easily attached to the built-in hole 81 of the inner cover 23 together with the sensor spring 92.

[0028] In a state where the lid temperature sensor 80 is attached to the lid 21, the side surface 93a of the notch 93 formed in the lid 21
Hit by the side surface 95a of the spring holding portion 95, since the state of the sensor casing 82 is prevented from rotating, including the heat-sensitive part 85 of the lid temperature sensor 80 by the spring holding portion 95, when opening the inner lid 31, the lid The protruding heat-sensitive part of the temperature sensor 80
The lid temperature sensor 80 does not actually rotate even if the user grasps 85 and tries to rotate it. Therefore, it is possible to prevent the wiring to the lid temperature sensor 80 from being entangled in the lid body 21 and the inclination of the heat-sensitive portion 85. Therefore, the reliability of the lid temperature sensor 80 is improved, the temperature of the inner lid 31 can always be accurately detected, and a stable inner lid can be obtained.
31 can be heated. Moreover, since a separate rotation prevention unit is not required, the structure has no waste and the cost can be reduced.

Further, by the sensor packing 97, the heat radiating plate
Water can be prevented from entering the inside of the lid body 21 through the gap between the through hole 87 of 24 and the heat-sensitive portion 85. Moreover, since the sensor packing 97 is made of an elastic member and has a substantially V-shaped cross section so as to be elastically deformed vertically with the vertical movement of the lid temperature sensor 80 including the heat sensitive portion 85, the heat sensitive portion 85 and the inner lid are Even if rice grains or the like are sandwiched between 31 and the heat-sensitive portion 85 is slightly inclined, the gap between the through-hole 87 of the heat dissipation plate 24 and the heat-sensitive portion 85 can be surely closed, and the waterproofness can be surely ensured. Can hold

Further, the elastic force of the elastic member forming the sensor packing 97 acts in the direction of separating the heat sensitive portion 85 of the lid temperature sensor 80 from the inner lid 31, but if the elastic force of the sensor packing 97 is too strong, The force with which 85 is pressed against the inner lid 31 becomes weak, and the temperature detection accuracy may be easily deteriorated when foreign matter is present. However, the sensor packing 97 has a substantially V-shaped cross section, and the sensor packing 97
By reducing the elastic force of the sensor to about 1/2 of the elastic force of the sensor spring 92, it is possible to sufficiently secure the force with which the heat-sensitive portion 85 contacts the inner lid 31. Therefore, the heat-sensitive portion 85 can be surely brought into contact with the inner lid 31, thermal coupling between the both can be made favorable, and good temperature detection accuracy can be ensured. If the temperature detection accuracy is improved, energy saving is improved by preventing unnecessary heating during rice cooking and heat retention, and at the time of heat retention, the top surface of the rice is dried due to excessive heating of the inner lid 31, and the inside of the pan 6 is heated. The stickiness of rice due to dew condensation around the can be suppressed.

The present invention is not limited to the above embodiment, and various modifications can be made. For example,
Although the rice cooker of the above-described embodiment uses electromagnetic induction heating to heat the pot 6, the pot 6 may be heated by an electric heater.

[0032]

According to the rice cooker of the first aspect of the present invention, the temperature detecting means is projected from the through hole formed in the lid lower surface member so that the heat sensitive portion of the temperature detecting means is elastically brought into contact with the inner lid. In the rice cooker, the temperature detecting means is provided with an elastic body holding portion which also functions as a rotation preventing mechanism for the heat sensitive portion and presses the heat sensitive portion against the inner lid side, and the notch portion formed in the lid body and the elastic body holding portion.
By hitting the part, the heat sensitive part will be stopped.
With this configuration , the temperature detecting means can be easily incorporated in the manufacturing process, and the entanglement of the wiring and the inclination of the heat-sensitive portion due to the rotation of the temperature detecting means can be prevented, and the reliability of the temperature detecting means can be improved.

Further, according to the rice cooker of the second aspect of the present invention, a packing for closing the through hole of the lid lower surface member and the heat sensitive portion is provided on the outer periphery of the heat sensitive portion, and the packing is provided for vertical movement of the heat sensitive portion. The elastic force of the elastic member is elastically deformed in the vertical direction. The elastic force of this elastic member is made weaker than the elastic force of the elastic body that elastically abuts the heat-sensitive portion on the inner lid. Water can be prevented from entering the inside of the lid through the gap between the temperature detecting means and the heat detecting portion of the temperature detecting means can be reliably brought into contact with the inner lid, and the reliability of the temperature detecting means can be secured. .

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a rice cooker of the present invention.

FIG. 2 is an enlarged cross-sectional view near the lid temperature sensor.

FIG. 3 is a top view of the vicinity of the upper lid temperature sensor.

FIG. 4 is a cross-sectional view of an inner lid showing a first modified example of the inner lid.

FIG. 5 is a sectional view of an inner lid showing a second modified example of the inner lid.

FIG. 6 is a sectional view of an inner lid showing a third modified example of the inner lid.

FIG. 7 is an enlarged cross-sectional view of a part of an inner lid showing a fourth modified example of the inner lid.

FIG. 8 is an enlarged cross-sectional view of a part of an inner lid showing a fifth modified example of the inner lid.

FIG. 9 is an enlarged cross-sectional view of a part of the inner lid showing a sixth modified example of the inner lid.

[Explanation of symbols]

1 Rice Cooker Main Body 6 Pan (Container) 21 Lid 24 Heat Dissipation Plate (Lid Lower Surface Member) 31 Inner Lid 80 Lid Temperature Sensor (Temperature Detecting Unit ) 85 Heat Sensing Part 87 Through Hole 92 Sensor Spring (Elastic Body) 93 Notch Part 95 Spring holding part (elastic body holding part) 97 Sensor packing (packing)

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazuyoshi Sekiya 2570 1 Gosuda, Kamo City, Niigata Prefecture 1 Toshiba Toshiba Home Techno Co., Ltd. (72) Inventor Koji Tsurumaki 2570 1 Gosuda, Kamo City, Niigata Prefecture Shiba Home Techno Co., Ltd. (56) Reference JP 10-221148 (JP, A) JP 5-141854 (JP, A) JP 9-234160 (JP, A) JP 9-75206 (JP, A) JP-A-3-70520 (JP, A) JP-A-10-211092 (JP, A) Actually open 60-40469 (JP, U) Actually open 6-44985 (JP, U) Actual Kaihei 5-1420 (JP, U) S. 63-1945 (JP, Y1) (58) Fields investigated (Int. Cl. ⁷ , DB name) A47J 27/00 103

Claims (2)

(57) [Claims] 1. A rice cooker main body, a container accommodated in the rice cooker main body, and a lid body provided on the upper side of the rice cooker body so as to be openable and closable, and the lower surface of the lid body is formed. An inner lid that covers the upper opening of the container is provided below the lid lower surface member, a through hole is formed in the lid lower surface member, and the temperature is provided inside the lid to detect the temperature of the inner lid. In the rice cooker in which the detection means is projected from the through hole of the lid lower surface member and the heat-sensitive portion of the temperature detection means is elastically brought into contact with the inner lid, the temperature detection means is provided with a rotation preventing mechanism for the heat-sensitive portion. An elastic body holding portion for pressing the heat sensitive portion against the inner lid side is also provided , and the notch portion formed in the lid body and the elastic body holding portion.
When the and hit, the heat sensitive part will be stopped.
Rice cooker characterized by being configured into . 2. A packing for closing the through hole of the lid lower surface member and the heat sensitive section is provided around the outer periphery of the heat sensitive section, and the packing is made of an elastic member that is elastically deformed vertically as the heat sensitive section moves up and down. The rice cooker according to claim 1, wherein the elastic force of the elastic member is weaker than the elastic force of the elastic body that elastically abuts the heat-sensitive portion on the inner lid.