JP3543561B2 - rice cooker - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to an electric rice cooker used in a general household.
[0002]
[Prior art]
2. Description of the Related Art In recent years, electric rice cookers have been required to be safer and easier to use. Conventionally, this type of electric rice cooker generally has a configuration as shown in FIG.
[0003]
Hereinafter, the configuration will be described with reference to FIG. In FIG. 3, a pot 1 for putting rice and water is accommodated in a protective frame 2 made of a metal steel plate, and is placed on a rice cooker 4 made of aluminum into which a sheath heater 3 is cast. The rice cooker 4 is screwed to the bottom of the protection frame 2. The upper frame 5 is made of synthetic resin and holds the upper end of the protection frame 2. Reference numeral 6 denotes a heat shielding frame made of a metal steel plate attached to improve the heat retaining performance by a heat insulating effect, and is screwed to the protective frame 2 at the bottom surface so as to surround the protective frame 2. Reference numeral 7 denotes a synthetic resin body which is fitted to the upper frame 5 and is fixed to the heat shield frame 6 by a plurality of screws 8. A code reel 9 is screwed to the bottom surface of the body 7 and supplies power to the rice cooker 4 and a board unit that controls a temperature sensor via lead wires.
[0004]
When rice cooking is started in the above configuration, the temperature sensor senses the temperature in the pot 1 and the board unit controls the heating of the rice cooking heater 4 in which the seeds heater 3 is embedded, so that delicious rice can be cooked.
[0005]
[Problems to be solved by the invention]
However, in the above-described conventional configuration, if the board unit breaks down due to the use of the substrate unit for a long time in a bad environment such as high temperature and humidity, the control of the rice cooker 4 becomes impossible at the worst, and the rice cooker 4 continues to be heated. State. Therefore, the synthetic resin upper frame 5 and the body 7 begin to melt due to the high heat of the rice cooker 4, and the protective frame 1 has its upper end held by the upper frame 5. Will fall to At that time, there is a possibility that a spark is generated when the power supply terminal portion provided on the upper surface of the code reel 9 and the heat shield frame 6 come into contact with each other.
[0006]
An object of the present invention is to solve the above-mentioned conventional problems, and an object of the present invention is to provide a rice cooker capable of maintaining a safe use state as a structure in which a power supply terminal portion is not easily short-circuited.
[0007]
[Means for Solving the Problems]
A rice cooker according to the present invention for solving the above problems includes a heater for heating a pot, a protection frame for storing at least the pot and the heater, a synthetic resin body for holding an upper end of the protection frame, and the protection frame. , A lower frame fixed to the body and the sensor base, and a code reel located below the sensor base and having a power supply terminal on the upper surface thereof, wherein the sensor base includes the power supply. This is a hollow body having a dish-shaped flange portion of the peripheral wall higher than the height of the terminal portion.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
According to the first, second, and third aspects of the present invention, even if the upper frame is melted and the protective frame falls, the protective frame hits the incombustible material gripped in a dish shape and does not contact the power terminal portion of the cord reel. In this case, no spark is generated, and only the synthetic resin member such as the body and the lower frame is melted and deformed.
[0009]
【Example】
(Example 1)
Hereinafter, a first embodiment of the present invention will be described with reference to FIG. In FIG. 1, reference numeral 1 denotes a pot for putting rice and water, which is stored in a protective frame 2 made of a metal steel plate and placed on a rice cooker 4 made of aluminum into which a sheath heater 3 is cast. The rice cooker 4 is screwed to the bottom of the protection frame 2. The body 5 is made of synthetic resin and holds the upper end of the protection frame 2. Reference numeral 6 denotes a sensor base made of a metal steel plate, and a sensor (not shown) in contact with the center of the bottom of the pan 1 is disposed at the center, and is dish-shaped and screwed to the bottom of the sensor base 6 and the bottom of the protective frame 2. . Reference numeral 7 denotes a lower frame made of a synthetic resin, which is fitted to the body 5, and is fixed to the sensor base 6 by a plurality of screws 8. Reference numeral 9 denotes a cord reel which is disposed below the lower frame and is screwed to the bottom of the lower frame 7, and supplies power to the rice cooker 4, the board unit and the temperature sensor in the body 5 via lead wires. ing. A power supply cord is pulled out from the cord reel 9 and connected to an AC 100V power supply. It said bottom sensor in contact with the center of the pan 1 is the outer peripheral wall than the downward of the bottom surface of the sensor base 6 which are arranged in the center constitutes the flange portion 6A becomes dished. Below the sensor base 6, the cord reel 9 is disposed on the upper surface of the cord reel 9 has the power supply terminal portions 9A, also provided above the cord reel 9 upper surface formed with non-combustible on the sensor board 6 This is a position covered by the dish-shaped flange portion 6A , and the length of the dish-shaped flange portion 6A of the peripheral wall is lower than the outer periphery of the bottom surface of the sensor base 6 is longer than the height of the power supply terminal portion 9A on the upper surface of the code reel 9. .
[0010]
In the electric rice cooker configured as described above, as described in the conventional example, the board unit breaks down, the control of the rice cooker 4 becomes impossible, and as a worst case, the state in which the rice cooker 4 continues to be heated occurs. The following describes the case in which the operation is performed. If left unattended for a long time, the synthetic resin body 5 begins to melt, and the protective frame 1 has its upper end held by the body 5 and loses its holding power and falls along with the pot 1 onto the floor. Would. However, even if the sensor base 6 falls, the dish-shaped flange portion of the peripheral wall contacts the upper surface of the cord reel 9 made of non-combustible material below the bottom surface of the sensor base 6, and the bottom surface of the sensor base 6 and the power terminal part of the code reel 9. Since 9A does not contact, no spark is generated, and only the synthetic resin members such as the body 5 and the lower frame 7 are melted and deformed, so that the safety of the rice cooker main body can be maintained.
[0011]
(Example 2)
Further, a second embodiment of the present invention will be described with reference to FIG. The pot 1, the protective frame 2, the sheath heater 3, the rice cooker 4, the body 5, the sensor base 6, the lower frame 7, the screw 8, and the code reel 9 are the same as those in the first embodiment, and the description is omitted. In the present embodiment, the bottom surface of the protection frame 2 is subjected to several convex processings, and the sensor base 6 is brought into contact. The distance between the sensor base 6 and the bottom surface of the protection frame 2 is widened.
[0012]
In the electric rice cooker configured as described above, a case will be described in which a state occurs in which the electric power to the rice cooker 4 is kept energized as described in the first embodiment and the rice cooker 4 is continuously heated. If left unattended for a long time, the synthetic resin body 5 begins to melt, and the protective frame 1 has its upper end held by the body 5 and loses its holding power and falls along with the pot 1 onto the floor. Would. Further, the synthetic resin lower frame 7 fixed to the sensor base 6 with a plurality of screws 8 is significantly melted and deformed. However, even if the protection frame 2 falls, the bottom surface of the protection frame 2 is subjected to several convex processes to reduce the area where the sensor base 6 is brought into contact, and the heat conduction of the rice cooker 4 being continuously heated. And the space between the bottom surface of the protective frame 2 and the sensor base 6 is increased, so that even when the sensor base 6 falls, the degree of melting and deformation of the synthetic resin member such as the lower frame 7 can be reduced. Thus, the safety of the rice cooker main body can be maintained.
[0013]
(Example 3)
Further, a third embodiment will be described with reference to FIGS. The pot 1, the protective frame 2, the sheath heater 3, the rice cooker 4, the body 5, the sensor base 6, the lower frame 7, the screw 8, and the cord reel 9 are the same as those in the first and second embodiments, and the description is omitted. Reference numeral 8 denotes a screw for fixing the sensor base 6 and the lower frame 7, and as shown in the figure, the distance X between the screw head and the floor surface is equal to the gap between the power supply terminal 9A of the cord reel 9 and the bottom of the sensor base 6. The length of the dish-shaped flange portion 6A below the bottom surface of the sensor base 6 is determined so as to be smaller than or equal to Y. Although only one screw 8 is shown in the figure, a plurality of screws 8 are attached in at least two places with the same configuration.
[0014]
In the electric rice cooker configured as described above, as described in the first and second embodiments, the case where the state where the power to the rice cooker 4 is kept energized and the rice cooker 4 continues to be heated occurs. explain. If left unattended for a long time, the synthetic resin body 5 begins to melt, and the protective frame 1 has its upper end held by the body 5 and loses its holding power and falls along with the pot 1 onto the floor. Would. However, even if the sensor base 6 has dropped, dished flange portion 6A provided on the sensor base 6, but hits the cord reel 9 upper surface formed with non-combustible, and the bottom surface of the cord reel power supply terminal section 9A and the sensor base 6 In the gap Y, the length of the dish-shaped flange 6A provided on the sensor base is longer than the height of the code reel power supply terminal 9A, and the bottom surface of the sensor base 6 and the power supply terminal 9A of the code reel 9 are Since no contact occurs, no spark is generated.
[0015]
When the lower frame 7 is thermally deformed by the heat of the sensor base 6, the head of the screw 8 hits the floor, but the distance X between the screw head and the floor is determined by the power terminal 9A of the code reel 9 and the sensor base. When the gap is smaller than or equal to the gap Y with the bottom surface of the base 6, the bottom surface of the sensor base 6 does not contact the power terminal 9 A of the cord reel 9, so that no spark is generated and the body 5 and the lower frame 7 are combined. The resin member is melted and deformed but does not fall over, and the safety of the rice cooker main body can be maintained.
[0016]
【The invention's effect】
As described above, according to the first aspect of the present invention, the dish-shaped flange portion of the peripheral wall is provided below the outer periphery of the bottom surface of the sensor base so that the power supply terminal portion of the code reel does not abut on the metal sensor base. By covering the power supply section of the cord reel , the board unit breaks down, the control of the rice cooker becomes impossible, the worst case occurs, the synthetic resin body begins to melt, the body melts and the protective frame falls Even so, since the dish-shaped flange portion is interposed, contact between the protective frame, the bottom surface of the sensor base and the power terminal portion of the cord reel can be avoided, and the safety of the rice cooker can be maintained.
[0017]
According to the second aspect of the present invention, the bottom surface of the protective frame is subjected to several convex processes to reduce the contact area by contacting the sensor base, and to increase the space between the bottom surface of the protective frame and the sensor base. By doing so, it is possible to reduce the degree of melting and deformation of the synthetic resin members such as the lower frame even if the protective frame and the sensor base fall, while reducing the heat conduction of the rice cooker that is continuously heated, and the rice cooker body Safety can be maintained.
[0018]
According to the third aspect of the present invention, the distance between the tip of the screw head and the floor at several places for fixing the lower frame to the bottom of the dish-shaped flange of the sensor base is determined by the power supply terminal of the cord reel and the sensor base. The head of the screw hits the floor surface before the protective frame and the bottom of the sensor base contact the power terminal of the cord reel even if the protective frame falls down by making it smaller than or equal to the gap at the bottom of In addition, it is possible to avoid contact between the protective frame, the bottom surface of the sensor base and the power supply terminal portion of the cord reel, to prevent the fall, and to maintain the safety of the rice cooker main body.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a rice cooker according to a first embodiment of the present invention. FIG. 2 is a cross-sectional view of a rice cooker according to a second embodiment of the present invention. Description]
DESCRIPTION OF SYMBOLS 1 Pot 2 Protective frame 3 Sheath heater 4 Rice cooker 5 Body 6 Sensor base 6A Dish-like flange part provided in sensor base 7 Lower frame 8 Screw 9 Code reel 9A Code reel power supply terminal

Claims (3)

A heater for heating the pan, a protective frame for storing at least the pan and the heater, a synthetic resin body for holding an upper end of the protective frame, and a sensor base fastened to the protective frame, the center of the bottom of the pan. A sensor and a lower frame fixed to the body and the sensor base; and a code reel positioned below the sensor base and having a power supply terminal on the upper surface thereof, below the outer periphery of the bottom surface of the sensor base. A rice cooker having a dish-shaped flange portion of the peripheral wall configured to cover a power supply portion of the cord reel, and having a dish-shaped flange portion of the peripheral wall longer than the height of the power supply terminal portion. 2. The rice cooker according to claim 1, wherein the sensor base is attached to several projections provided on the bottom surface of the protection frame. 2. The rice cooker according to claim 1, wherein the distance between the tip of the screw head for fixing the lower frame to the sensor base and the floor surface is smaller than or equal to the gap between the power terminal part of the cord reel and the bottom surface of the sensor base.

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