JPH0366316A - Electric rice cooker - Google Patents

Abstract

PURPOSE:To constitute rigidly a cover body to eliminate the deformation and to prevent heat of a cover heater from exerting the influence on an operating part by providing a cover supporting body which is placed between the upper cover to which the cover heater is attached and the operating part and holds the cover body. CONSTITUTION:The subject rice cooker is provided with a cover supporting body 40 which is placed between the upper cover 18 to which a cover heater 20 is attached and an operating part 50 and holds a cover body 10. Each element of a supporting frame 41 provided with a notch part 41a on a hollow part, a reflecting plate 42 of aluminum provided with a recessed part 42a in the middle, a heat insulating material 43 made to match a shape of the recessed part 42a, and a reinforcing plate 44 in which reinforcing irregularity and a bend part are formed and which is made of a little thick stainless steel is assembled to a unit type and a cover supporting body 40 is constituted. The recessed part 42a of the reflecting plate 42 is fitted into the hollow part of the supporting frame 41 and superposed. In a clearance generated by a notch part 41a at the time when the reflecting plate 42 and the supporting frame 41 are superposed, a lead wire 28 of the cover heater 20 is inserted through. Also, when a rice cooker is assembled, the reinforcing plate 44 reinforces a coupling part of a synthetic resin and a metal, etc., and fixed in one body with the cover supporting body 40, etc., and deformation of the whole cover body 10 caused by heat, and external force is prevented.

Description

[Detailed Description of the Invention] [Industrial Application Field] This type of electric rice cooker uses a full-surface heating method that heats the inner pot from multiple directions, rather than one-sidedly heating the inner pot from the bottom with a rice-cooking heater. is known to improve rice cooking performance. For this reason, in addition to the main heater of the case body, a rice-cooking heater is attached to the lid side, and this lid heater is used to heat the inner pot from above to cook rice.

The present invention relates to an electric rice cooker, and particularly to an improvement of an electric rice cooker in which an inner pot is heated from above using a lid heater.

[Prior Art] FIG. 4 is an explanatory diagram of the configuration of an electric rice cooker for explaining a conventional device, and here, the rice cooker described in Japanese Patent Application Laid-Open No. 63-43818 is exemplified.

In Figure 4, (1) is the main body, (2) is the insulation frame, and (3) is the main body.
) is the rice cooking heater, (4) is the thermostat, (5> is the pot, (lO) is the lid, (11> is the handle, (12
> is the push button, (13) is the latch, (14) is the hinge shaft,
05> is a steam cylinder, (18) is a heat insulator, (20) is a reflector, (21> is a fixture, and (22) is a cap. Also, (25) is attached to the bottom surface of the lid (10). It is a covered lid heater.

Usually, ABS resin or polypropylene resin is used for this type of lid. As shown in the figure, a lid heater (25) and a reflector (20
> is attached. In addition, there is a latch (13) on the tip.
is fixed, and a bearing for a hinge shaft (14) is provided at the other end. The bearing of the hinge shaft (14) is attached to the lid body (14).
0) serves as a rotational fulcrum when opening and closing.

In addition, the latch (13) and hinge shaft (t4) are attached to the handle (
11) to support the weight of the main body (1) when carrying the rice cooker.

[Problem to be solved by the invention] As mentioned above, the inner surface of the conventional rice cooker lid ((0)
A lid heater (25) and a reflector (20) are directly attached. In addition, on the front and back of the lid (10), there is a latch (13) that supports the weight when carrying the rice cooker, and a hinge shaft (4).
> is also provided. Therefore, if the rice cooker is carried around or the lid (10) is repeatedly opened and closed, the latch (13)
The female screw for fixing the hinge will loosen and become loose, and the bearing on the hinge side will wear out and play. In addition, since the lid heater (25) with high power is provided, the lid body (
10> may be heated and deformed as a whole. - If the bearing is worn or the lid (10) is deformed, the main body (
1) A gap is created between the two and heat and steam escape through the gap, not only wasting electricity but also significantly reducing rice cooking performance. In particular, when an operating section is provided on the lid, there are problems such as circuit elements being affected by heat and causing malfunctions.

The present invention has been made to solve these problems of conventional rice cookers.The lid body is constructed to be robust so that it does not deform, and the heat from the lid heater does not affect the operation part. The aim is to create a rice cooker that never fails.

[Means for Solving the Problems] The present invention is an electric rice cooker that is provided with a lid support that is disposed between an upper lid to which a lid heater is attached and an operating section and that holds the lid.

Then, the lid support is stacked with the reflective plate on the lid heater side and the metal reinforcing plate on the operation part side with the insulation material in between, and then integrated into a support frame made of synthetic resin that has high strength and high heat resistance. Combined to form a unit.

[Function] Between the top lid to which the lid heater is attached and the operating section, there is a lid interposed in a frame with a reflective plate on the lid heater side and a metal reinforcing plate on the operating section side stacked with a heat insulating material in between. A support is provided.

Additionally, the tip of the metal reinforcing plate is fixed to the latch with a screw, and the hinge spring holder at the rear end is made of gold. The heat directed upward from the lid heater is reflected by the reflective plate of the lid support and further blocked by the heat insulating material. Further, a lid support reinforced with a reinforcing plate extending in the front-rear direction holds the entire lid and connects the lid and the main body via a latch and a hinge.

[Embodiment of the Invention] FIG. 1 is a diagram for explaining the configuration of an embodiment of the present invention, FIG. 2 is an inner view of the lid, and FIG. 3 is an exploded perspective view of the lid.

The embodiments of the present invention shown in FIGS. 1 to 3 also have structural parts similar to those in FIG. 4, and some overlap, but since they are different in shape and function, they will be explained in more detail here. do.

In Figures 1 and 2, (1) is the case body, (2>
is the outer pot attached to the inside of the case body (1), (3)
) is a rice cooking heater, (4) is a sensor, and (5) is an inner pot. A standard water level line is engraved inside the inner pot (5) to indicate the appropriate amount of water for the rice capacity, and is used for convenience when cooking rice.The inner pot (5) is similar to the outer pot (2). It can be taken out freely from 〉. (6〉 is the latch holder.

(7> is a frame plate that covers the upper part of the gap between the case body (1>) and the outer pot (2), (8) is a heat shield plate, and (9) is a plug attached to the cord reel.

(10) is a lid provided on the upper part of the case body (1) (see also FIG. 3). (1t) is the hinge for opening and closing the lid body (10>), (12) is the hinge shaft, (13) is the hinge spring, (14) is the latch corresponding to the latch receiver (B), (15)
) is a steam cylinder, and (1B) is a push button. (17) is the inner lid, and (18) is the upper lid. (18a) is the shaft, (1
8b) is a disc-shaped heat dissipation part. Near the center of the inner lid (17), a radiating portion (17a) is provided which has a large number of circular holes and extends into a spherical shape. (17b) is the inner lid (17
) is a bowl-shaped rubber gasket attached to the top surface of the inner lid (17) through this rubber gasket (17b).
8) and is detachably attached to the shaft (18a). (20> is a can-shaped lid heater, (28
) is the lead wire.

(31) is a mounting plate. For the mounting plate (31), caulk the two shafts (18a) and attach the lid heater (20) to the top lid.
18> is pressed and fixed to the inner surface of the heat dissipation part (18b).

(32) is a synthetic resin upper lid frame, (33) is an upper lid gasket, and the upper M (18) to which the lid heater (20) is fixed is attached to the upper lid frame (32) from below via the gasket (33). .

(41) is a support frame provided with a notch (41a) in the hollow part;
(42) is an aluminum reflector with a recess (42a) in the center, (43) is an insulating material such as glass wool made to match the shape of the recess (42a), and (44) is a reinforcing unevenness plate. The reinforcing plate is made of slightly thick stainless steel and has a bent portion, and each of these elements is assembled into a unit to form the lid support (40). The support frame (41) is made of polyethylene terephthalate (PE), which has high rigidity and heat resistance.
T) is used, and the structure is designed to be heat resistant and durable against the lid heater (20).In addition, a reflector (42) is used.
The recess (42a) fits into the hollow part of the support frame (41) and is overlapped with the support frame (41). The lead wire (28) of the lid heater (20) is inserted into the gap created by the notch (41a) when the reflector (42> and the support frame (41>) are overlapped.Also, when the rice cooker is assembled When the reinforcing plate (44) is mounted, the front end (44a) of the reinforcing plate (44) is fixed to the board of the latch (14) with a screw, and the rear end (44b) is fixed to the hinge spring (13).
It serves as a support for reinforcing joints between synthetic resin and metal. In addition, the reinforcing plate (44) is attached to the lid support (40
), etc., so that the lid body is protected from heat or external force.
It also functions to prevent overall deformation.

(50) is an operating section attached to the lid cover (10a) of the lid body (10), and (51) is an operating sheet in the operating section (50). (53) is the bottom plate, (54> is the printed board, (55> is the printed board (54>) with other circuit elements.
The display mounted on the top, (5B) is the printed board (5
4> are a plurality of lead wires derived from. Bottom plate (5
3) is pressed against the partition wall formed on the lid (10), and the printed board (54) and the like inside are hermetically housed.

In the electric rice cooker of the present invention having such a configuration, the inner pot (
5) Add the polished rice and the specified amount of water to medium M (
17) and close the lid (10). Next, pull out the cord reel and connect the plug (9) to the toov power outlet. Next, while looking at the display on the display window (52) on the surface of the lid (10), the user operates the operation sheet (51) of the operation section (50) to reserve and set a meal time. When the rice cooking start time corresponding to the reserved meal time arrives, the timer of the microcomputer is activated and the switch is turned on, and the rice cooking heater (3) and the lid heater (20) are energized. Lid heater (2
The radiant heat emitted from the inner pot (5) works together with the heat emitted from the rice cooking heater (3) installed at the bottom of the inner pot (5) to virtually cover the entire surface of the water and rice inside the inner pot (5). It will heat up.

Rice cooking begins by heating the entire surface of the lid heater (20) and the rice cooking heater (3), and the temperature of the water in the inner pot (5) rises to generate steam. When rice cooking progresses and the water boils, the water in the inner pot (5) decreases and the temperature rises rapidly, the sensor (4)
) is activated, and the electricity supply to the rice cooking heater (3) and lid heater (20) is automatically stopped. As a result, the rice will be cooked in the inner pot (5), and the rice will be cooked evenly and ready to eat at the reserved time, and you can start serving the rice.When you press the push button (16) on the top of the lid (20), the hinge spring will open. The elastic force of (13) causes the lid body (20> to rotate around the hinge shaft (12>), opening the top surface of the main case (1) and serving freshly cooked rice.

In the above embodiment, an electric rice cooker is described in which a hinge spring is provided on the hinge of the lid and the lid is automatically opened by pressing a push button. The present invention can also be applied to a handle-type rice cooker.

[Effects of the Invention] As described above, according to the present invention, an electric rice cooker is provided with a lid support that is disposed between the upper lid to which the lid heater is attached and the operating section and holds the lid.

In particular, this lid support is constructed into an integral structure by stacking a reflective plate on the lid heater side and a metal reinforcing plate on the operating section side with a heat insulating material in between and combining them with a synthetic resin support frame. therefore,
Even if the rice cooker is carried around and the lid is opened and closed repeatedly, there is no need for the screws used to fix the latch to become loose or for the bearings on the lid to wear out. In addition, even if a lid heater with a somewhat large amount of power is installed, the lid support reflects or blocks the heat, so the heat is concentrated in the direction of the inner pot, eliminating wasted heating and making it more effective. There is also little risk of the body deforming due to heating. As a result, there is no waste of power or deterioration in rice cooking performance due to deformation of the lid, and it is possible to prevent malfunctions of the circuit elements of the operating section due to heat.

Therefore, according to the present invention, it is robust and has good heat consumption efficiency.
Furthermore, it is possible to provide an electric rice cooker with high rice cooking performance.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram of the configuration of an embodiment of the present invention, Fig. 2 is an internal view of the lid, Fig. 3 is an exploded perspective view of the lid, and Fig. 4 is an explanatory diagram of the configuration of a conventional electric rice cooker. . In Figures 1 and 3, (1) is the case body, (2>
is the outer pot, (3) is the rice cooking heater, (4) is the sensor, (5)
is the inner pot, (6) is the latch holder, (7) is the frame plate, (8) is the heat shield, (9) is the plug, (10) is the lid, (11) is the hinge, (12) is the hinge. The shaft, (13) is the hinge spring, (
14) is the latch, (15) is the steam cylinder, (18) is the push button,
(17) is the inner lid, (18) is the upper lid, (20) is the lid heater, (28) is the heater lead, (31) is the mounting plate, (32) is the
) is the upper lid frame, (33) is the upper lid gasket, (41> is the support frame, (42> is the reflector, (43) is the heat insulator, (44> is the reinforcing plate, (50) is the operation part, (51>) is the operation sheet, (
52) is a display window, (53) is a bottom plate, (54) is a printed board, (55) is a display, and (56> is a lead wire. The same reference numerals in the figures indicate the same or corresponding parts.

Claims (4)

[Claims] (1) A main heater for rice cooking is placed on the inner bottom of the outer pot attached to the inside, and a case body in which the inner pot is inserted; one end of the case body is supported by a hinge, and a latch is attached to the other end, and the top In the electric rice cooker, the electric rice cooker is equipped with a lid body that is provided with an operation part and is opened using the hinge as a fulcrum with a push button, and a lid heater provided on the bottom side of the lid body, the top lid having the lid heater attached thereto; An electric rice cooker characterized in that a lid support body is provided that is disposed between the operating section and holds the lid body. (2) Claim characterized in that the lid support is integrally assembled with a synthetic resin support frame by overlapping a reflective plate on the lid heater side and a metal reinforcing plate on the operating unit side with a heat insulating material in between. (1
) electric rice cooker. (3) Claim (2) characterized in that one end of the reinforcing plate is fixed to a latch, and the other end is used as a receiver for an end of a hinge spring.
Electric rice cooker as described. (4) The electric rice cooker according to claim 2, wherein the support frame is made of polyethylene terephthalate material to form a hinge portion on the lid side.