JP4137907B2 - rice cooker - Google Patents

Description

  The present invention relates to a rice cooker that performs rice cooking and heat insulation, and more particularly to a rice cooker having a main body with a handle.

  In general, this type of rice cooker is disclosed in, for example, Patent Document 1 in which an inner pot corresponding to a pan is freely housed in a main body and rice is cooked. In this patent document 1, the cover body etc. which cover an inner hook are provided.

  By the way, in recent years, it has become mainstream to form the main body that forms the outline of the rice cooker with an upper frame and an outer frame. As disclosed in Patent Document 1, the main body is provided with a handle. This handle can be held by hand when moving the rice cooker and is convenient for the user.

  If the handle is engaged with the main body only with the upper frame, the height of the upper surface of the upper frame will be increased by the thickness of the handle, reducing the appearance quality as a rice cooker and consequently the merchantability. become.

Moreover, in order to improve the appearance quality as a rice cooker, it is required to shorten the height of the upper side surface of the upper frame as much as possible. The main body of the rice cooker is configured with the outer lower surface portion of the upper frame and the outer upper surface portion of the outer frame facing each other, but the outer upper surface portion of the outer frame is bent inward so that the tip of this bent portion extends upward. If a fitting structure that inserts a step bend into the upper frame is adopted, the upper side of the upper frame is the height of the portion extending upward in the step bend of the outer frame. A large height dimension is required, which is not preferable in terms of the appearance quality of the rice cooker. Therefore, such a problem is avoided by forming a curled portion having a substantially annular cross-sectional shape instead of forming a step bent portion on the outer upper surface portion of the outer frame. In this case, the curled portion formed on the outer upper surface portion of the outer frame is abutted against the outer lower surface portion of the upper frame, and a hooking portion is provided locally to hold the curled portion on the outer lower surface portion of the upper frame. The upper frame and the outer frame have a mounting structure, and the outer upper surface of the outer frame that forms the curled portion should have a thickness that does not lose the strength of pressing the outer lower surface of the upper frame during mounting. In other words, by covering the outer lower surface of the upper frame with the outer upper surface of the outer frame from the outside, the height of the upper surface of the upper frame can be made extremely small.
JP 2000-70129 A

  However, the above-described conventional support structure for the main body and the handle and the mounting structure for the upper frame and the outer frame have the following problems.

  In the above structure, there is nothing that regulates the spread of the outer frame to the outer method, and the outer periphery of the outer frame is larger than the outer periphery of the upper frame due to deviations in the peripheral length of the upper frame and the outer frame, dimensional variations during manufacturing, etc. There is a case where it partially protrudes. Then, a local gap is generated in the attachment part between the upper frame and the outer frame, and foreign matter can easily enter the main body from the gap, or the main body needs to be disassembled to remove foreign matter, and the rice cooker As a result, not only the appearance quality is reduced, but also the commercial value of the product is significantly reduced.

  Moreover, since the upper frame forms the upper surface part of the main body, it receives the weight of the inner pot suspended from the upper frame and the cooked food in the inner pot, and a downward force is always applied. This downward force is also applied to the outer upper surface of the outer frame facing the outer lower surface of the upper frame, and this results in a force that pushes the outer frame outward, and the outer periphery of the outer frame is It tends to be a phenomenon that protrudes locally rather than the outer periphery. In particular, in a pressure rice cooker that pressurizes the interior of the inner pot above atmospheric pressure during rice cooking, a greater force is generated inside the main body, so this phenomenon appears more prominently.

  In order to prevent such outward spreading of the outer frame, it is only necessary to form a stepped bent portion instead of a curled portion on the outer upper surface portion of the outer frame. In that case, the upper side surface of the upper frame has a large height. It becomes a dimension and the merchantability as a rice cooker falls.

  In addition, there is a method of locally connecting the upper frame and the outer frame using a separate U-shaped part. However, since another member is manufactured, it causes a cost increase such as a material cost, which is also preferable. Not a thing.

  Therefore, in view of the above problems, an object of the present invention is to provide a rice cooker that has high appearance quality as a product and can be manufactured at low cost while preventing the outer frame from spreading locally.

In the rice cooker in Claim 1 of this invention, since the outer frame is formed facing the upper frame, a part of the upper frame can be covered from the outside by the outer frame, and the appearance quality as a rice cooker is improves. In addition, even if a force to push the outer frame outwards is applied due to the weight of the inner pot or the cooked rice in the inner pot, the bent part formed on the outer frame It abuts against a certain hanging portion to restrict the outer frame from spreading further outward. Therefore, the phenomenon that the outer periphery of the outer frame protrudes locally from the outer periphery of the upper frame can be avoided, and foreign matter can be prevented from entering the main body. In addition, the bent part that regulates the outward spread of the outer frame can be easily formed by leaving the outer frame section that occurs when the through-hole is formed without being cut out, thereby avoiding an increase in the number of parts. The manufacturing cost can be reduced. In addition, in a state where the outer frame is incorporated in the upper frame, the bent portion is arranged to face the hanging portion, so that the assembly workability can be improved. Further, if a fitting portion that fits with the substantially annular portion is formed on the upper frame, the height of the upper frame can be shortened as much as possible, and the upper frame and the outer frame can be more securely attached and fixed. Also, the force that the outer frame pushes outwards is received by the hook and insertion part of the upper frame, so do not apply excessive force to the fitting part between the upper frame and the substantially annular part. Can do.

In the rice cooker in Claim 2 of this invention, since the outer frame is formed facing the upper frame, a part of the upper frame can be covered from the outside by the outer frame, and the appearance quality as a rice cooker is improves. Also, even if a force to push the outer frame outward is applied due to the weight of the inner pot or the cooked food in the inner pot, the locking part of the bent part formed on the outer frame It abuts on the inward insertion portion of the, and restricts the outer frame from spreading further outward. Therefore, the phenomenon that the outer periphery of the outer frame protrudes locally from the outer periphery of the upper frame can be avoided, and foreign matter can be prevented from entering the main body. In addition, the bent part with the locking part that regulates the outward spread of the outer frame can be easily formed by leaving the section of the outer frame generated when forming the through hole without being cut out. Can be avoided, and the manufacturing cost can be reduced. Further, if a fitting portion that fits with the substantially annular portion is formed on the upper frame, the height of the upper frame can be shortened as much as possible, and the upper frame and the outer frame can be more securely attached and fixed. Also, the force that the outer frame pushes outwards is received by the hook and insertion part of the upper frame, so do not apply excessive force to the fitting part between the upper frame and the substantially annular part. Can do.

In the rice cooker in Claim 3 of this invention, since the outer frame is formed facing the upper frame, a part of the upper frame can be covered from the outside by the outer frame, and the appearance quality as a rice cooker is improves. In addition, even if a force to push the outer frame outward is applied in response to the weight of the inner pot or the cooked rice in the inner pot, the bent part formed on the outer frame is not hung on the frame plate. Abutting on the part restricts the outer frame from spreading further outward. Therefore, the phenomenon that the outer periphery of the outer frame protrudes locally from the outer periphery of the upper frame can be avoided, and foreign matter can be prevented from entering the main body. In addition, the bent part that regulates the outward spread of the outer frame can be easily formed by leaving the outer frame section that occurs when the through-hole is formed without being cut out, thereby avoiding an increase in the number of parts. The manufacturing cost can be reduced. In addition, in a state where the outer frame is incorporated in the upper frame, the bent portion is arranged to face the hanging portion, so that the assembly workability can be improved. In addition, if the fitting portion that fits the substantially annular portion is formed on the upper frame, the height of the outer lower surface portion of the upper frame can be shortened as much as possible, and the upper frame and the outer frame can be more securely attached and fixed. In addition, the force that the outer frame pushes outward is received by the hooking part and the insertion part of the frame plate, so that excessive force is not applied to the fitting part between the upper frame and the substantially annular part. be able to.

In the rice cooker in Claim 4 of this invention, since the outer frame is formed facing the upper frame, a part of the upper frame can be covered from the outside by the outer frame, and the appearance quality as a rice cooker is improves. In addition, even if a force to push the outer frame outward is applied in response to the weight of the inner pot or the cooked rice in the inner pot, the locking part of the bent part formed on the outer frame is It abuts against the insertion part provided on the outer frame to restrict the outer frame from spreading further outward. Therefore, the phenomenon that the outer periphery of the outer frame protrudes locally from the outer periphery of the upper frame can be avoided, and foreign matter can be prevented from entering the main body. In addition, the bent part with the locking part that regulates the outward spread of the outer frame can be easily formed by leaving the section of the outer frame generated when forming the through hole without being cut out. Can be avoided, and the manufacturing cost can be reduced.

In the rice cooker according to claim 5 of the present invention, if the fitting portion that fits the substantially annular portion is formed on the upper frame, the height of the outer lower surface portion of the upper frame can be shortened as much as possible, and the upper frame and the outer frame. Can be installed and fixed more securely. Also, the force which the outer frame is going to spread press outward, so engaging portion and the insertion portion of the frame plate receive, so as not to apply excessive force to the fitting portion between the upper frame and the Ryakuwa shaped portion can do.

In the rice cooker according to the sixth aspect of the present invention, the frame plate as the reinforcing member is used, and the connecting portion of the hinge portion is also passed through the receiving portion provided on the frame plate. As a result, the strength as a product can be improved.

According to the rice cooker according to claim 1 of the present invention, the appearance quality as a product is high, the manufacturing cost can be reduced, and the assembling workability can be improved while preventing a local spread of the outer frame. In addition, the height of the outer lower surface portion of the upper frame can be shortened as much as possible, the upper frame and the outer frame can be more securely attached and fixed, and no excessive force is applied to the fitting portion between the upper frame and the substantially annular portion. Can be.

According to the rice cooker in claim 2 of the present invention, the appearance quality as a product is high and the manufacturing cost can be reduced while preventing the outer frame from spreading locally. In addition, the height of the outer lower surface portion of the upper frame can be shortened as much as possible, the upper frame and the outer frame can be more securely attached and fixed, and no excessive force is applied to the fitting portion between the upper frame and the substantially annular portion. Can be.

According to the rice cooker in claim 3 of the present invention, the appearance quality as a product is high, the manufacturing cost can be reduced, and the assembling workability can be improved while preventing the outer frame from spreading locally. In addition, the height of the outer lower surface portion of the upper frame can be shortened as much as possible, the upper frame and the outer frame can be more securely attached and fixed, and no excessive force is applied to the fitting portion between the upper frame and the substantially annular portion. Can be.

According to the rice cooker in claim 4 of the present invention, the appearance quality as a product is high and the manufacturing cost can be reduced while preventing the local spread of the outer frame.

According to the rice cooker in claim 5 of the present invention, the height of the outer lower surface portion of the upper frame can be shortened as much as possible, the upper frame and the outer frame can be more securely attached and fixed, and the upper frame and the substantially annular portion. It is possible to prevent an excessive force from being applied to the fitting portion.

According to the rice cooker in Claim 6 of this invention, the intensity | strength as a product can be improved with a frame board.

  Hereinafter, preferred embodiments of the rice cooker according to the present invention will be described with reference to the accompanying drawings.

  First, based on FIG.8 and FIG.9, the structure of the rice cooker which is an example of this invention is demonstrated. The structure of this rice cooker is common to each Example demonstrated below.

  In the figure, reference numeral 1 denotes a main body that forms the outline of a rice cooker. This main body 1 is formed by an upper frame 2 that constitutes an upper surface and an upper side surface thereof, and a substantially cylindrical outer frame 3 that constitutes a side surface. A bottom plate 4 that covers the bottom opening of the frame 3 is provided. The upper frame 2 and the bottom plate 4 are formed of a synthetic resin such as PP (polypropylene), while the outer frame 3 is formed of a metal member such as stainless steel, for example, in order to improve cleanability and appearance quality. . Moreover, it is provided covering the bottom opening of the substantially cylindrical pan accommodating portion 6 formed integrally from the inner peripheral portion of the upper surface of the upper frame 2 and the pan accommodating portion 6, such as PET (polyethylene terephthalate). The inner frame 8 formed of a synthetic resin forms a pan container 9 made of a nonmagnetic material and having a bottomed cylindrical shape for accommodating a pan 11 described later.

  In the pot housing 9, a bottomed cylindrical pot 11 for storing a rice to be cooked such as rice or water is detachably accommodated. This pan 11 is a pan body 12 mainly made of aluminum with good thermal conductivity, and a heating element 13 composed of a magnetic metal plate such as ferritic stainless steel joined from the lower side to the bottom of the outer surface of the pan body 12. It consists of. The reason why the heating element 13 is not provided from the center to the top of the side surface of the pan 11 is to reduce the weight of the pan 11. An annular flange portion 14 is formed around the upper end of the pan 11 so as to extend to the outer periphery thereof. In addition, it is the structure which does not provide an overheating means in the outer periphery of the pan accommodating part 6. FIG.

  The inner frame 8 is positioned to face the heating element 13 of the pan 11, but the bottom part of the pot 11, particularly the bottom part, is electromagnetically placed on the lower side and bottom part of the outer surface of the inner frame 8 facing the heating element 13. A heating coil 16 is provided as a heating means for induction heating. When a high-frequency current is supplied to the heating coil 16, the heating element 13 of the pan 11 is heated by the alternating magnetic field generated from the heating coil 16, and the cooked rice such as water and rice in the pan 11 and the pan 11 is heated. It has become so.

  In addition, a temperature sensor 21 serving as a pan temperature detecting means is disposed in the center of the bottom of the inner frame 8 so as to elastically contact the outer surface of the bottom of the pan 11, and detects the temperature of the pan 11. The heating temperature of the bottom of the pan 11 by 16 is mainly controlled.

  A cord heater 26 for heating the upper part of the side surface of the pan 11, in particular, the flange portion 14, is arranged in an annular shape at the upper end of the pan housing 9, located below the flange portion 14 of the pan 11. . The cord heater 26 is composed of an electric heater, and is held on a heater ring 27 as a heat dissipation suppressing member mounted so as to be placed on the upper end of the pot housing 9 and covers the cord heater 26 from above. In this way, a flange heater is configured by including the metal plate 29 attached to the heater ring 27 and having both a fixing metal member made of, for example, an aluminum plate having excellent heat conductivity and a heat radiating portion. The metal plate 29 is located opposite to the gap between the rice cooker body 1 and the lid 31. Then, the lower surface of the flange portion 14 of the pan 11 is placed on the upper surface of the metal plate 29, whereby the pan 11 is accommodated in the pan accommodating body 9 while being hung on the upper frame 2 of the main body 1. It is like that. Therefore, there is almost no gap between the pan 11 and the upper end of the pan housing 9 in which the pan 11 is housed. Moreover, the flange portion 14 of the pan 11 has an outer shape that is equal to or greater than the size of the cord heater 26, so that the cord heater 26 is covered with the flange portion 14 of the pan 11 from above. . However, although not shown in the drawing, the handle portion (flange portion 14) of the pan 11 is made non-contact, and by partially forming a gap, when cooking rice with water attached to the outer surface of the pan 11, Steam is discharged from the gap.

  The lid body 31 is provided with a hinge portion 32 connected to the main body 1 at a rear portion thereof. The hinge portion 32 includes a shaft 33 as a rotating shaft, and the force of a hinge spring (not shown) wound around the shaft 33 urges the lid 31 in the opening direction with the shaft 33 as a fulcrum. Yes. Further, the hook portion 37 disposed at the front portion of the lid 31 is detachably engaged with the clamp 36 provided on the upper front portion of the upper frame 2, thereby resisting the force of the hinge spring. The lid 31 is held in a closed state.

  The lid 31 forms, for example, a plastic outer lid 41 that forms the upper shell of the upper surface, a three-dimensional metal lid 42 that closes the opening of the outer surface of the outer lid 41, and a lower surface that is the inner surface of the lid 31. The main components are a heat radiating plate 43 as a lid lower surface material and an outer lid cover 44 as a lid base material that combines the outer lid 41 and the heat radiating plate 43 to form the skeleton of the lid 31. An inner lid 47 that directly covers the upper opening of the pan 11 is detachably mounted on the lower surface, which is the inner surface of the lid 31, with a predetermined gap formed between the lower surface and the lower surface. The heat radiating plate 43 and the inner lid 47 are both made of metal, and are made of, for example, a material obtained by anodizing stainless steel or aluminum. Further, a packing base 48 in which the hook portion 37 is formed is fixed to the outer peripheral portion of the inner lid 47, and a lid packing 49 is fixed by being sandwiched between the packing base 48 and the inner lid 47. As a result, the inner lid 47 and the lid packing 49 are integrated by the packing base 48, and the lid packing 49 is also detachably provided on the inner surface of the lid body 31 together with the inner lid 47. The lid packing 49 is formed in an annular shape by an elastic member such as silicone rubber or fluororubber, and abuts against the upper surface of the flange portion 14 of the pan 11 to close the gap between the pan 11 and the inner lid 47. It seals the steam generated from the. A contact portion of the lid packing 49 with the pan 11 is opposed to the cord heater 26 with the flange portion 14 interposed therebetween.

  A lid heater 51 as a lid heating means is provided on the upper surface of the heat radiating plate 43 inside the lid body 31. The lid heater 51 may be an electric heater such as a cord heater or an electromagnetic induction heating type heating coil. Further, the radiator plate 43 is provided with a thermistor-type lid temperature sensor 52 for controlling the temperature of the inner lid 47 by the lid heater 51 as a lid temperature detecting means for detecting the temperature of the inner lid 47 of the lid 31 in particular. It has been. A steam port 53 for releasing steam generated in the pan 11 to the outside is detachably attached to the center of the top surface of the lid 31 from the top surface side of the lid 31. Further, in the heat sink 43 and the inner lid 47, a steam passage opening is formed at a position below the steam port 53, and a steam port packing 54 is provided at the lower end of the steam port 53. It has been.

  An operation panel 55 is provided at the front of the main body 1. Inside this operation panel 55 is an LCD 56 that displays the time and the selected menu, although not shown in the figure, an LED that displays the current process, a switch for starting rice cooking, and selecting a menu, etc. Is mounted on the surface of the display substrate 57. The operation panel 55 corresponding to the operation unit displays a button name and the like, and prevents dust and water from adhering to the control means which is an electronic component. The operation panel 55 may be provided on the front side of the lid 31.

  61 is a heating control means provided in the rear side of the main body 1. The heating control means 61 includes a heating element (not shown) for driving the heating coil 16 which is a heating means provided on the substrate. The element that drives the heating coil 16 is heated along with the oscillation of the heating coil 16, but has a use condition temperature that guarantees the operating state, and therefore needs to be used at a certain temperature or lower. For this purpose, the element that drives the heating coil 16 is thermally connected to a fin-like radiator 62 made of a material having good thermal conductivity, such as aluminum, and emits from a cooling fan 63 that is a cooling means. The element is driven within the operating condition temperature by applying the wind to the heat radiator 62 to remove the heat.

  The cooling fan 63 is disposed below or on the side of the radiator 62 attached to the heating control means 61. In addition, a hole for discharging the warm air from the radiator 62 attached to the heating control means 61 to the outside of the main body 1 is formed in the bottom or side of the main body 1. A plurality of 64 are provided. The heating control means 61 is housed inside the product, that is, in the main body 1, but may be disposed at any position on the outer periphery of the pan 11. Moreover, the hole 64 provided in the bottom part or the side part of the main body 1 may be arranged at any position. However, in recent years, there is a demand for miniaturization of products, and the heating control means 61 and the cooling fan 63 and the hole 64 for discharging warm air are arranged at approximately opposite positions across the pan 11. Is preferred.

  A cord reel 66 for winding a power plug (not shown) is provided inside the main body 1. Reference numeral 67 denotes a rotatable handle for transportation provided so as to straddle both sides of the main body 1. A handle hanging portion 68 is formed integrally with the rear portion of the upper frame 2, and when the handle 67 is tilted backward, the lower surface of the handle 67 abuts on the handle hanging portion 68 so that the handle 67 is substantially horizontal. It is designed to be held in a state. The mounting structure of the main body 1 and the handle 67 will be described in detail later in each embodiment.

  Next, the control system will be described with reference to FIG. In the same figure, 71 is the above-mentioned heating control means, which receives each temperature information from the pan temperature sensor 21 and the lid temperature sensor 52, and heats the bottom of the pan 11 during cooking and keeping warm. The cord heater 26 that heats the side portion of the pan 11 and the lid heater 51 that heats the lid 31 are respectively controlled. In particular, the heating control means 61 of the present embodiment mainly controls the heating coil 16 based on the temperature detected by the pan temperature sensor 21 to manage the temperature of the bottom of the pan 11, and based on the temperature detected by the lid temperature sensor 52. The lid heater 51 is controlled to control the temperature of the heat radiating plate 43 and thus the inner lid 47. The heating control means 61 includes cooking control means for controlling cooking heating of the cooking object as a function on the control sequence of the program stored in its storage means (not shown). Rice cooking control means 70 that cooks and heats the food to be cooked in the pan 11, and heat retention control means 71 that heats and heats the rice in the pot 11 to a predetermined heat retention temperature during heat insulation, respectively.

  Reference numeral 72 denotes a heating coil driving means that incorporates a high-frequency inverter circuit that receives a control signal from the heating control means 61 and supplies a predetermined high-frequency current to the heating coil 16. Separately from this, the output side of the heating control means 61 receives a control signal from the heating control means 61 and drives the lid heater 51 so as to heat the radiator plate 43 and the inner lid 47. 73 and code heater driving means 74 for turning on the code heater 26 in response to a control signal from the heating control means 61 are provided. At the time of cooking by the rice cooking control means 70 and at the time of heat insulation by the heat insulation control means 71, heating to the bottom of the pan 11 by the heating coil 16 and the code heater 26 by detecting the temperature from the pan temperature sensor 21 and the lid temperature sensor 52. The heating is performed on the side surface of the pan 11 and the lid body 31 is heated by the lid heater 51. In addition, after the rice cooking by the rice cooking control means 70 is finished and the cooked food in the pan 11 is cooked as rice, it automatically shifts to heat insulation by the heat insulation control means 71, and the temperature detected by the pot temperature sensor 21 is reached. Based on this, by adjusting the heating of the pan 11 by the heating coil 11 and the cord heater 26, the rice is kept at a predetermined temperature (about 70 ° C. to 76 ° C.).

  In particular, supplementary explanation about the heating by the cord heater 26, until the temperature of the rice is lowered from about 100 ° C. to about 73 ° C. after the rice cooking, and when the temperature is stable at about 73 ° C., the code heater 26 is heated, Heat is radiated from the metal plate 29 into the space between the lid 31 and the main body 1 to suppress cooling due to intrusion of outside air from the gap, and the flange portion 14 of the pan 11 is heated. In addition, the cord heater 26 also heats the flange portion 14 of the pan 11 during the period when the rice is reheated during heat insulation, so that moisture generated by heating the rice is prevented from condensing on the upper part of the inner surface of the pan 11. ing.

  Next, the effect | action is demonstrated about the said structure. When rice and water that are to be cooked are put into the pan 11 and rice cooking by the rice control means 70 is started, the heating coil 16 and the cord heater 26 are used based on the temperature detection of the bottom of the pan 11 by the pan temperature sensor 21. The bottom part and side part of the pan 11 are heated, respectively, and the water temperature in the pan 11 is kept at about 45 to 60 ° C. for 15 to 20 minutes. After that, the pan 11 is heated strongly by the heating coil 16 to boil the cooking object. When the temperature of the bottom of the pan 11 becomes 90 ° C or higher during this boiling heating and the temperature of the lid 31 is stabilized at 90 ° C or higher, it is assumed that the inside of the pan 11 is in a boiling state, and the heating amount is reduced more than before. Shift to continuous boiling heating. Note that the fact that the temperature of the lid 31 is stable at 90 ° C. or higher is detected by the rate of temperature rise of the detected temperature from the lid temperature sensor 52. In this boiling detection, the pan temperature sensor 21 and the lid temperature sensor 52 can confirm that both the bottom of the pan 11 and the lid 31 have reached 90 ° C. or more, and the pan 11 has completely boiled. Can be detected accurately.

  Further, when any of the bottom of the pan 11, the side surface of the pan 11 or the lid 31 reaches a detection temperature that cannot be normally 120 ° C. or higher, the heating control means 61 determines that there is some abnormality and cooks rice. The amount of heating in the heating is reduced so that all operations are stopped, or the operation is shifted to the unevenness described later, or the heat is kept to prevent abnormal heating. Conversely, either the bottom of the pan 11 or the lid 31 has reached 90 ° C. or more and a predetermined time (for example, 5 minutes) has passed, but either the bottom of the pan 11 or the lid 31 other than that. If the temperature is lower than 90 ° C, the pan temperature sensor 21 or the lid temperature sensor 52 in this low temperature state determines that the temperature detection accuracy has deteriorated for some reason (dirt, tilt, poor contact, etc.). In the same manner, the amount of heating in rice cooking heating is reduced to a state where all operations are stopped, or the operation is shifted to unevenness, or the heat is kept to cope with this.

  When shifting to continuation of boiling, the rice cooking control means 70 starts lid heating by the lid heater 51. The lid heating here is managed by the detected temperature of the lid temperature sensor 52 so that the temperature of the inner lid 47 becomes 100 to 110 ° C. And if the bottom part of the pan 11 raises predetermined temperature, cooking will be detected and it will transfer to unevenness. During unevenness, the lid heater 51 is cut off by temperature control based on the temperature detected by the lid temperature sensor 52, preventing dew from the inner lid 47, and high temperature (98-100 ° C) that prevents the rice from burning. The temperature at the bottom of the pan 11 is controlled so that it is maintained. The unevenness is continued for a predetermined time (15 to 20 minutes), and when the unevenness is completed, the operation shifts to the heat retention by the heat retention control means 71.

  When it is warming, the heating coil 16 heats the bottom and the lower side of the pan 11 and is slightly higher than the temperature of the rice accommodated in the pan 11, the lid heater 51 heats the lower surface of the lid 31, and The temperature of the side of the pan 11 is controlled by the code heater 26 so that the rice does not dry and a large amount of dew does not adhere. The temperature of the rice in the pan 11 is maintained at 70 to 76 ° C. Even when the temperature is kept, the pan temperature sensor 21 and the lid temperature sensor 52 are abnormally high or abnormally low. Detects abnormalities and prevents this abnormal heating.

  Next, the structure in the characteristic part of a present Example is demonstrated in detail based on FIG. 1 and FIG. In each of these drawings, reference numeral 77 denotes a shaft portion provided at the base end of a handle 67 having a U-shape or a U-shape, and the shaft portion 77 is formed to project toward the left and right side surfaces of the main body 1. Further, a hole through which the shaft portion 77 of the handle 67 can penetrate, that is, a through hole 78 is provided on the side surface of the main body 1 and the outer frame 3 symmetrically.

  The upper frame 2 and the outer frame 3 are formed on the outer lower surface portion of the upper frame 2 with a curled portion 80 having a substantially annular cross-sectional shape on the outer upper surface portion of the outer frame 3 made of a metal plate material. By being abutted against the recessed portion 81, they are attached and fixed to each other. These curled portions 80 and concave portions 81 do not have to be provided on the entire circumference of the main body 1 but may be provided partially (locally). Further, it is desirable that the through hole 78 is arranged so as not to interfere with the curled portion 80 having a substantially annular cross-sectional shape. By forming the curled portion 80 on the outer upper surface portion of the outer frame 3, the curled portion 80 is held in the concave portion 81 of the upper frame 2, and as a result, the outer frame 3 is firmly fixed to the upper frame 2 without a gap. At the same time, a space 82 is formed between the outer frame 3 and the pot accommodating portion 6 of the inner frame 2.

  Inside the through hole 78, a handle shaft support portion 83 that supports the shaft portion 77 of the handle 67 is disposed as a rib of the upper frame 2. The shaft portion 77 of the handle 67 is inserted into the main body 1 from the through-hole 78 formed in the outer frame 3, and the shaft portion 77 is fitted and supported on the handle shaft support portion 83 of the upper frame 2. The handle 67 can freely rotate with the portion 77 as a fulcrum. Further, a bent portion 85 extending inward with the upper peripheral edge of the through hole 78 as a base end is integrally formed in the outer frame 3 so as not to hinder the rotation of the handle 67. The bent portion 85 is formed by leaving a section cut out when the through-hole 78 is formed in the outer frame 3. That is, if any part of the section when the through hole 78 is formed in the metal plate-like outer frame 3 is left, it can be folded at the periphery of the through hole 78 separately from the curled portion 80 fitted into the concave portion 81 of the upper frame 2. The bent portion 85 can be formed integrally with the outer frame 3. Further, the bent portion 85 of the present embodiment is bent upward from the front end portion in the middle, and the cross section is formed in an L shape as shown in FIG.

  When a force to push the outer frame 3 outward is applied to the upper side 2 of the synthetic resin on the inner side of the outer lower surface facing the outer frame 3, the tip of the bent portion 85 is A hooking portion 86 that abuts and restricts further movement of the outer frame 3 is formed. The hooking portion 86 is provided as a vertical wall portion inside the concave portion 81 of the upper frame 2 and is located outside the front end portion of the bent portion 85 provided in the outer frame 3. When the curled portion 80 is pushed into the concave portion 81 from the lower side of the frame 2 and the outer frame 3 is assembled into the upper frame 2, the front end portion of the bent portion 85 is arranged to face the inside of the hook portion 86. Reference numeral 87 denotes an exposed portion exposed on the surface of the main body 1 on the outer surface of the upper frame 2.

  In the configuration of the present embodiment, the curled portion 80 formed on the outer upper surface portion of the outer frame 3 is abutted against the outer lower surface portion of the upper frame 2, and the curled portion 80 is pushed into the concave portion 81 from the lower side of the upper frame 2. , The outer frame 3 is incorporated into the upper frame 2 with a part of the outer lower surface portion of the upper frame 2 covering the outer upper surface portion of the outer frame 3 from the outside. Thus, since the outer upper surface portion of the outer frame 3 is formed above the through-hole 78, the outer upper surface portion of the outer frame 3 can be seen as the appearance by facing the outer lower surface portion of the upper frame 2. The height of the exposed portion 87 of the upper frame 2 can be made as small as possible, and the appearance quality as a rice cooker can be improved.

  When the outer frame 3 is incorporated in the upper frame 2, the front end of the bent portion 85 provided on the outer frame 3 faces the hook 86 on the inside of the hook 86 provided on the upper frame 2. Arranged. Therefore, it is not necessary to incorporate the bent portion 85 so that the bent portion 85 is fitted to the hook portion 86, and the assembly workability is improved, and the weight of the cooked rice in the pan 11 and the pan 11 is received. Even if a force to push the frame 3 outward is applied, the distal end portion of the bent portion 85 abuts against the hooking portion 86, and the outer frame 3 can be prevented from further spreading outward. The phenomenon in which the outer periphery of the outer region protrudes locally from the outer periphery of the upper frame 2 can be avoided. Furthermore, since the curled portion 80 that can be fitted into the concave portion 81 of the upper frame 2 is formed on the outer upper surface portion of the outer frame 3 in this embodiment, the height of the outer lower surface portion of the upper frame 2 is made as short as possible. In addition, the upper frame 2 and the outer frame 3 can be attached and fixed more reliably. Further, it is possible to prevent foreign matter from entering the inside of the main body 1 without causing a gap at the fitting portion between the concave portion 81 and the curled portion 80. In addition, the hooking portion 86 of the upper frame 2 that abuts against the distal end portion of the bent portion 85 receives the force that the outer frame 3 tries to push outward and the fitting portion between the concave portion 81 and the curled portion 80. For example, even if a large pressure is generated inside the main body 1 such as a pressure rice cooker, an excessive force is not applied to the fitting portion between the concave portion 81 and the curled portion 80. Can be.

  In terms of manufacturing cost, the bent portion 85 that restricts outward spreading of the outer frame 3 extends from the peripheral edge of the through hole 78 that penetrates the shaft portion 77 of the handle 67. It can be easily formed by leaving the section of the outer frame 3 generated when forming the 78 without being cut out. That is, the outer frame 3 can be integrally formed with a curled portion 80 that forms the outer upper surface portion thereof and a bent portion 85 that is disposed opposite to the hooking portion 86 of the upper frame 2, thereby increasing the number of parts. In addition, the manufacturing cost can be reduced.

  As described above, in this embodiment, the main body 1 that houses the pot 11 that is the inner pot, the lid body 31 that covers the opening of the pan 11, and the shaft portion 77 that is pivotally supported by the main body 1 are rotatable. In what constitutes the main body 1 of the rice cooker with the handle 67 and the outer lower surface portion of the upper frame 2 and the outer upper surface portion of the outer frame 3 facing each other, a through hole as a hole through which the shaft portion 77 of the handle 67 passes. A hole 78 and an L-shaped bent portion 85 extending inwardly from the through hole 78 are formed in the outer frame 3, and a hooking portion 86 as a hooking portion provided inward from the outer lower surface portion of the upper frame 2. The bent portion 85 and the hooking portion 86 are arranged to face each other.

  In this case, since the outer upper surface portion facing the outer lower surface portion of the upper frame 2 is formed on the outer frame 3, a part of the outer lower surface portion of the upper frame 2 is covered from the outside by the outer upper surface portion of the outer frame 3. It is possible to improve the appearance quality as a rice cooker. In addition, even if a force to push the outer frame 3 outward is applied in response to the weight of the pot 11 or the cooked rice in the pot 11, the L-shaped bent portion 85 formed on the outer frame 3 The outer frame 3 abuts on the hooking portion 86 located inward from the outer lower surface of the upper frame 2 to restrict the outer frame 3 from spreading further outward. Therefore, a phenomenon in which the outer periphery of the outer frame 3 protrudes locally from the outer periphery of the upper frame 2 can be avoided, and foreign matter can be prevented from entering the main body 1. Furthermore, the bent portion 85 that restricts the outward spread of the outer frame 3 can be easily formed by leaving the section of the outer frame 3 generated when the through hole 78 is formed without being cut out. The increase can be avoided and the manufacturing cost can be reduced. Moreover, in the state in which the outer frame 3 is incorporated in the upper frame 2, the outer surface of the bent portion 85 is disposed to face the hooking portion 86, so that the assembly workability can be improved.

  Particularly in this embodiment, a substantially circular curled portion (substantially annular portion) 80 is formed on the outer upper surface portion of the outer frame 3. In this case, if the concave portion 81 as a fitting portion that fits the curl portion 80 is formed on the outer lower surface portion of the upper frame 2, the height of the outer lower surface portion of the upper frame 2 can be shortened as much as possible. The outer frame 3 can be attached and fixed more reliably. Further, since the hooking portion 86 of the upper frame 2 that contacts the bent portion 85 receives the force that the outer frame 3 tries to push outward, the concave portion 81 and the curl portion on the outer lower surface portion of the upper frame 2 are received. It is possible to prevent excessive force from being applied to the mating portion with 80.

  Next, a second embodiment of the present invention will be described with reference to FIGS. In addition, the code | symbol common to the location of the part common to each Example is attached | subjected, and the overlapping description is abbreviate | omitted as much as possible.

  Also in this embodiment, the outer frame 3 is integrally formed with a bent portion 85 extending inward with the upper peripheral edge of the through hole 78 as a base end, but the cross section of the bent portion 85 is horizontal until reaching the tip portion. The bent portion 85 is formed with a hole 88 corresponding to a locking portion. The hole 88 of the bent portion 85 has a groove shape with one side open as shown in FIG. 4, but may have other shapes. Further, on the inner side of the outer lower surface portion of the upper frame 2, in place of the hook portion 86 of the first embodiment, an insertion portion 89 that locks in the hole 88 and restricts the outward movement of the outer frame 3. Is formed. The insertion portion 89 is provided so as to hang from the bottom surface of the recess 81, and when the outer frame 3 is assembled from the lower side of the upper frame 2, the upper frame 2 is inserted into the hole 88 of the bent portion 85 provided in the outer frame 3. The insertion portion 89 is disposed at a position where it can be inserted. Other configurations are the same as those in the first embodiment.

  In this embodiment, the insertion portion 89 provided on the upper frame 2 is inserted into the hole 88 of the bent portion 85 provided on the outer frame 3 in a state where the outer frame 3 is incorporated into the upper frame 2. Therefore, the hole 88 of the bent portion 85 is in contact with the insertion portion 89 even if a force is applied to push the outer frame 3 outward in response to the weight of the pot 11 or the cooked rice in the pot 11. The outer frame 3 can be prevented from spreading further outward, and the phenomenon that the outer periphery of the outer frame 3 protrudes locally from the outer periphery of the upper frame 2 can be avoided. Also in this embodiment, the curled portion 80 that fits into the concave portion 81 of the upper frame 2 is formed in the outer frame 3, so that the force that the outer frame 3 tries to push outward is applied to the bent portion 85. The insertion portion 89 of the upper frame 2 in contact with the hole 88 is received so as not to concentrate on the fitting portion between the concave portion 81 and the curled portion 80. Therefore, for example, even if a large pressure is generated inside the main body 1 such as a pressure rice cooker, an excessive force can be prevented from being applied to the fitting portion between the concave portion 81 and the curled portion 80.

  Also, in terms of manufacturing cost, the bent portion 85 with the hole 88 that restricts outward spreading of the outer frame 3 extends from the periphery of the through hole 78 that penetrates the shaft portion 77 of the handle 67. It can be easily formed by leaving the section of the outer frame 3 generated when the through-hole 78 is formed without being cut out. Therefore, the outer frame 3 can be integrally formed with a curled portion 80 that forms the outer upper surface portion thereof and a bent portion 85 with a hole 88 that is inserted into the insertion portion 89 of the upper frame 2, thereby increasing the number of parts. Therefore, the manufacturing cost can be reduced.

  As described above, in this embodiment, the main body 1 that houses the pot 11 that is the inner pot, the lid body 31 that covers the opening of the pan 11, and the shaft portion 77 that is pivotally supported by the main body 1 are rotatable. In what constitutes the main body 1 of the rice cooker with the handle 67 and the outer lower surface portion of the upper frame 2 and the outer upper surface portion of the outer frame 3 facing each other, a through hole as a hole through which the shaft portion 77 of the handle 67 passes. A hole 78 and a bent portion 85 extending inwardly from the through hole 78 are formed in the outer frame 3, and the hole 88 as a locking portion provided in the bent portion 85 is formed inside the outer lower surface portion of the upper frame 2. The insertion part 89 provided in the direction is arranged to be insertable.

  Also in this case, since the outer upper surface portion facing the outer lower surface portion of the upper frame 2 is formed on the outer frame 3, a part of the outer lower surface portion of the upper frame 2 is moved from the outside by the outer upper surface portion of the outer frame 3. It can cover and the appearance quality as a rice cooker improves. In addition, even if a force to push the outer frame 3 outward is applied in response to the weight of the pot 11 or the cooked rice in the pot 11, the hole 88 of the bent portion 85 formed in the outer frame 3 The outer frame 3 abuts on the insertion portion 89 located on the inner side from the outer lower surface portion of the upper frame 2 to restrict the outer frame 3 from spreading further outward. Therefore, a phenomenon in which the outer periphery of the outer frame 3 protrudes locally from the outer periphery of the upper frame 2 can be avoided, and foreign matter can be prevented from entering the main body 1. Further, the bent portion 85 with the hole 88 that restricts the outward spread of the outer frame 3 can be easily formed by leaving the section of the outer frame 3 generated when the through hole 78 is formed without being cut out. The increase in the number of parts can be avoided and the manufacturing cost can be reduced.

  Also in the present embodiment, the curl portion 80 having a substantially annular cross section is formed on the outer upper surface portion of the outer frame 3, so that the height of the outer lower surface portion of the upper frame 2 can be shortened as much as possible. The outer frame 3 can be attached and fixed more reliably. In addition, since the insertion portion 89 of the upper frame 2 that contacts the hole 88 of the bent portion 85 receives the force that the outer frame 3 pushes outward, the concave portion 81 on the outer lower surface portion of the upper frame 2 An excessive force can be prevented from being applied to the fitting portion with the curled portion 80.

  Next, a third embodiment of the present invention will be described with reference to FIGS. In addition, the code | symbol common to the location of the part common to each Example is attached | subjected, and the overlapping description is abbreviate | omitted as much as possible.

  In this embodiment, as shown in FIG. 6, a frame plate 91 made of a metal part is provided on the lower surface of the upper frame 2. The frame plate 91 is attached and fixed to the lower surface of the upper frame 2 as a frame-shaped reinforcing member that prevents deformation of the upper surface portion of the upper frame 2. A hinge portion 32 for connecting the main body 1 and the lid 31 is provided at the rear portion of the upper frame 2. Each of the vertical ribs 92 of the upper frame 2 located on the left and right sides of the hinge portion 32 is provided with a shaft 33. The penetrating hinge holes 93 are provided symmetrically. The hinge portion 32 is provided not only on the upper frame 2 but also on the rear portion of the outer lid cover 44. In the rear part of the outer cover 44, the vertical ribs 94 located on the left and right sides of the hinge part 32 are also provided with hinge holes 95 that pass through the shaft 33 symmetrically, and the hinge holes 93 and 95 are respectively left and right. Opposed to each other. Accordingly, the lid 31 is provided to be openable and closable with respect to the main body 1 by passing the shaft 33 through the hinge holes 93 and 95.

  Further, in the present embodiment, the hinge portion 32 is provided so as to extend to the rear portion of the frame plate 91. In the rear portion of the frame plate 91, the vertical walls 96 positioned on the left and right sides of the hinge portion 32 are also respectively connected to the shaft 33. Hinge holes 97 penetrating through are provided symmetrically. The vertical wall 96 that becomes the hinge portion 32 of the frame plate 91 is disposed inside the vertical rib 92 that becomes the hinge portion 32 of the upper frame 2. The common shaft 33 is inserted into the hinge hole 93 provided in the upper frame 2, the hinge hole 95 provided in the outer lid cover 44, and the hinge hole 97 provided in the frame plate 91.

  Further, as shown in FIG. 5, a portion extending downward from the outer end of the upper surface portion of the frame plate 91 is formed as a hook portion 99 inside the handle shaft support portion 83 of the upper frame 2. As with the hooking portion 86 in the first embodiment, the hooking portion 99 abuts the tip of the bent portion 85 when a force is applied to push the outer frame 3 outward. Further restricting the movement of the outer frame 3, it is in the vertical direction, which is the direction in which the outer frame 3 is assembled, and outside the front end of the bent portion 85 provided on the outer frame 3. When the curled portion 80 is pushed into the concave portion 81 from the lower side and the outer frame 3 is assembled into the upper frame 2, the distal end portion of the bent portion 85 is arranged to face the inside of the hook portion 99. Other configurations are the same as those in the first embodiment.

  In this embodiment, with the outer frame 3 incorporated in the upper frame 2, the front end of the bent portion 85 provided on the outer frame 3 is located inside the hook portion 99 provided on the frame plate 91. It is arranged facing 99. Therefore, even if a force to push the outer frame 3 outward is applied, it is possible to restrict the distal end of the bent portion 85 from coming into contact with the hook portion 99 and to further spread the outer frame 3 outward. The phenomenon that the outer periphery of the outer frame 3 protrudes locally than the outer periphery of the upper frame 2 can be avoided. In addition, the hooking portion 99 of the frame plate 91 that abuts on the distal end portion of the bent portion 85 receives the force that the outer frame 3 pushes outward, and the fitting portion between the concave portion 81 and the curled portion 80 is received. For example, even if a large pressure is generated inside the main body 1 such as a pressure rice cooker, an excessive force is not applied to the fitting portion between the concave portion 81 and the curled portion 80. Can be.

  Further, in this embodiment, the shaft 31 of the hinge portion 32 is passed through the hinge holes 93 and 95 as the hinge receiving portions provided in the main body 1 and the lid body 31 so that the lid body 31 can be opened and closed with respect to the main body 1. Since the shaft 33 of the hinge portion 32 is also passed through the hinge hole 97 as a receiving portion provided in the frame plate 91 using the frame plate 91 as a reinforcing member. The plate 91 can improve the strength of the receiving part and the product.

  As described above, in this embodiment, the main body 1 that houses the pot 11 that is the inner pot, the lid body 31 that covers the opening of the pan 11, and the shaft portion 77 that is pivotally supported by the main body 1 are rotatable. In the thing which comprises the handle | steering-wheel 67 and comprises the main body 1 of a rice cooker by making the outer side lower surface part of the upper frame 2 and the outer side upper surface part of the outer frame 3 oppose, the frame board 91 is arrange | positioned under the upper frame 2 In addition, a through-hole 78 as a hole through which the shaft portion 77 of the handle 67 passes and an L-shaped bent portion 85 extending inwardly from the through-hole 78 are formed in the outer frame 3 and provided on the frame plate 91. Inside the hook part 99 as the hook part, the bent part 85 and the hook part 99 are arranged to face each other.

  In this case, since the outer upper surface portion facing the outer lower surface portion of the upper frame 2 is formed on the outer frame 3, a part of the outer lower surface portion of the upper frame 2 is covered from the outside by the outer upper surface portion of the outer frame 3. It is possible to improve the appearance quality as a rice cooker. In addition, even if a force to push the outer frame 3 outward is applied in response to the weight of the pot 11 or the cooked rice in the pot 11, the L-shaped bent portion 85 formed on the outer frame 3 The outer frame 3 is prevented from further spreading outward by abutting on the hook portion 99 provided on the frame plate 91. Therefore, a phenomenon in which the outer periphery of the outer frame 3 protrudes locally from the outer periphery of the upper frame 2 can be avoided, and foreign matter can be prevented from entering the main body 1. Furthermore, the bent portion 85 that restricts the outward spread of the outer frame 3 can be easily formed by leaving the section of the outer frame 3 generated when the through hole 78 is formed without being cut out. The increase can be avoided and the manufacturing cost can be reduced. Moreover, in the state in which the outer frame 3 is incorporated in the upper frame 2, the outer surface of the bent portion 85 is disposed to face the hook portion 99, so that the assembly workability can be improved.

Next, a fourth embodiment of the present invention will be described with reference to FIG. In this embodiment, similarly to the third embodiment, a frame plate 91 as a reinforcing member made of a metal part is provided on the lower surface of the upper frame 2, and the structure of the hinge portion 32 is the same as that shown in FIG. . On the other hand, the bent portion 85 of the outer frame 3 is formed with a hole 88 corresponding to the locking portion as described in the second embodiment. In the frame plate 91, instead of the hook portion 99 as in the third embodiment, an insertion portion 101 is formed which is engaged with the hole 88 and restricts the outward movement of the outer frame 3. The insertion portion 101 is provided so as to hang from the bottom surface of the recess 81, and when the outer frame 3 is assembled from the lower side of the upper frame 2, the frame plate 91 is inserted into the hole 88 of the bent portion 85 provided in the outer frame 3. The insertion part 101 is disposed at a position where it can be inserted. Other configurations are the same as those in the third embodiment.

  In this embodiment, the insertion portion 101 provided on the frame plate 91 is inserted into the hole 88 of the bent portion 85 provided on the outer frame 3 with the outer frame 3 incorporated in the upper frame 2. Therefore, the hole 88 of the bent portion 85 is in contact with the insertion portion 101 even if a force is applied to push the outer frame 3 outward in response to the weight of the pot 11 or the cooked rice in the pot 11. The outer frame 3 can be prevented from spreading further outward, and the phenomenon that the outer periphery of the outer frame 3 protrudes locally from the outer periphery of the upper frame 2 can be avoided. Also in this embodiment, the curled portion 80 that fits into the concave portion 81 of the upper frame 2 is formed in the outer frame 3, so that the force that the outer frame 3 tries to push outward is applied to the bent portion 85. The insertion portion 101 of the frame plate 91 that contacts the hole 88 is received so as not to concentrate on the fitting portion between the concave portion 81 and the curled portion 80. Therefore, for example, even if a large pressure is generated inside the main body 1 such as a pressure rice cooker, an excessive force can be prevented from being applied to the fitting portion between the concave portion 81 and the curled portion 80.

  As described above, in this embodiment, the main body 1 that houses the pot 11 that is the inner pot, the lid body 31 that covers the opening of the pan 11, and the shaft portion 77 that is pivotally supported by the main body 1 are rotatable. In the thing which comprises the handle | steering-wheel 67 and comprises the main body 1 of a rice cooker by making the outer side lower surface part of the upper frame 2 and the outer side upper surface part of the outer frame 3 oppose, the frame board 91 is arrange | positioned under the upper frame 2 In addition, a through hole 78 as a hole through which the shaft portion 77 of the handle 67 passes and a bent portion 85 extending inward from the through hole 78 are formed in the outer frame 3, and a locking portion provided in the bent portion 85. The insertion portion 101 provided on the frame plate 91 is disposed so as to be insertable into the hole 88.

  Also in this case, since the outer upper surface portion facing the outer lower surface portion of the upper frame 2 is formed on the outer frame 3, a part of the outer lower surface portion of the upper frame 2 is moved from the outside by the outer upper surface portion of the outer frame 3. It can cover and the appearance quality as a rice cooker improves. In addition, even if a force to push the outer frame 3 outward is applied in response to the weight of the pot 11 or the cooked rice in the pot 11, the hole 88 of the bent portion 85 formed in the outer frame 3 It abuts against the insertion portion 101 provided on the frame plate 91 to restrict the outer frame 3 from spreading further outward. Therefore, a phenomenon in which the outer periphery of the outer frame 3 protrudes locally from the outer periphery of the upper frame 2 can be avoided, and foreign matter can be prevented from entering the main body 1. Further, the bent portion 85 with the hole 88 that restricts the outward spread of the outer frame 3 can be easily formed by leaving the section of the outer frame 3 generated when the through hole 78 is formed without being cut out. The increase in the number of parts can be avoided and the manufacturing cost can be reduced.

  Further, in common with the third embodiment and the fourth embodiment, a curl portion (substantially annular portion) 80 having a substantially annular cross section is formed on the outer upper surface portion of the outer frame 3. The height of the outer lower surface portion can be shortened as much as possible, and the upper frame 2 and the outer frame 3 can be more securely attached and fixed. Further, the force that the outer frame 3 pushes outward is applied to the hook portion 99 of the frame plate 91 that contacts the bent portion 85 or the insertion portion of the upper frame 2 that contacts the hole 88 of the bent portion 85. Since 101 is received, it is possible to prevent an excessive force from being applied to the fitting portion between the concave portion 81 and the curled portion 80 on the outer lower surface portion of the upper frame 2.

  Further, in common with the third embodiment and the fourth embodiment, a hinge portion 32 having a shaft 33 as a connecting means for connecting the main body 1 and the lid 31 is provided, and each of the main body 1 and the lid 31 is provided. The shaft 33 is passed through the hinge holes 93, 95, and 97 as receiving portions on the side so that the lid 31 can be opened and closed to the main body 1 and the hinge hole 97 as the receiving portion on the main body 1 side is opened to the frame plate 91. Provided. In this way, the frame plate 91 as the reinforcing member is used, and the shaft 33 of the hinge portion 32 is also passed through the hinge hole 97 as the receiving portion provided in the frame plate 91. As a result, the hinge hole 97 as a part, and hence the strength as a product can be improved.

  In addition, this invention is not limited to the said Example, It can change in the range which does not deviate from the meaning of this invention.

It is principal part sectional drawing of the rice cooker in 1st Example of this invention. It is an exploded perspective view of the principal part showing the attachment part periphery of an upper frame and an outer frame same as the above. It is principal part sectional drawing of the rice cooker in 2nd Example of this invention. It is an exploded perspective view of the principal part showing the attachment part periphery of an upper frame and an outer frame same as the above. It is principal part sectional drawing of the rice cooker in 3rd Example of this invention. It is the principal part exploded perspective view of the rice cooker showing the hinge part periphery especially same as the above. It is principal part sectional drawing of the rice cooker in 4th Example of this invention. It is a perspective view which shows the structure of a common rice cooker same as the above. It is the whole longitudinal cross-sectional view which shows the structure of a common rice cooker in common with each Example of this invention. It is a block diagram which shows an electrical structure same as the above.

Explanation of symbols

2 Upper frame 3 Outer frame
11 Pan (inner pot)
31 lid
32 Hinge
33 Shaft (connecting means)
67 Handle
77 Shaft
78 Through hole (hole)
8 0 curl portion (substantially annular portion)
85 Folding part
86 Hook (hanging part)
88 holes (through holes)
89 Plug
91 Frame plate
95, 97, 99 Hinge hole (receiving part)
99 Hook (hanging part)
101 Insertion section

Claims (6)

In a rice cooker comprising a main body for storing an inner pot, a lid for covering the inner pot, and a handle, and an upper frame and an outer frame facing each other,
A hole for penetrating the handle and a bent portion extending inside the hole are formed in the outer frame, and the bent portion and the hook portion are formed inside a hook portion provided inward of the upper frame. Are arranged opposite to each other, and a substantially annular portion that fits with the upper frame is formed on the outer upper surface of the outer frame . In a rice cooker comprising a main body for storing an inner pot, a lid for covering the inner pot, and a handle, and an upper frame and an outer frame facing each other,
A hole for penetrating the handle and a bent portion extending inside the hole are formed in the outer frame, and an insertion portion provided on the inner side of the upper frame in a locking portion provided in the bent portion Is disposed so as to be insertable, and a substantially annular portion that fits into the upper frame is formed on the outer upper surface of the outer frame . In a rice cooker comprising a main body for storing an inner pot, a lid for covering the inner pot, and a handle, and an upper frame and an outer frame facing each other,
As a reinforcing member for preventing the deformation of the upper frame, a frame plate is disposed below the upper frame, and a hole through which the handle is penetrated and a bent portion extending inside the hole are formed in the outer frame. The bent portion and the hanging portion are arranged to face each other inside the hanging portion provided on the frame plate, and a substantially annular portion that fits the upper frame is formed on the outer upper surface portion of the outer frame. Rice cooker characterized by having done. In a rice cooker comprising a main body for storing an inner pot, a lid for covering the inner pot, and a handle, and an upper frame and an outer frame facing each other,
As a reinforcing member for preventing the deformation of the upper frame, a frame plate is disposed below the upper frame, and a hole through which the handle is penetrated and a bent portion extending inside the hole are formed in the outer frame. And the rice cooker characterized by arrange | positioning the insertion part provided in the said frame board so that insertion was possible in the latching | locking part provided in the said bending part. Cooker according to claim 4 Symbol mounting, characterized in that the formation of the substantially annular portion of the upper frame and fitted to the outer upper surface portion of the outer frame. And connecting means for connecting the lid and the body, and a receiving portion on each side of the main body and the lid is provided, to engage the coupling means to the receiving portion, said main body said lid The rice cooker according to any one of claims 3 to 5 , wherein the receiving portion is also provided on the frame plate.

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