JPH0722540B2 - Electric rice cooker - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] In this type of electric rice cooker, a whole-face heating method in which the inner pot is heated from various directions rather than being heated from one side by a heater for rice cooking It is known that rice cooking performance is improved. For this reason, in addition to the main heater of the case main body, a heater for rice cooking is attached to the lid side, and the lid heater is used to heat the inner pot from above to cook rice.

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

[Prior Art] FIG. 4 is a structural explanatory view of an electric rice cooker for explaining a conventional device, and the rice cooker disclosed in JP-A-63-43618 is exemplified here.

In FIG. 4, (1) is the main body, (2) is the heat insulation frame,
(3) is a rice cooking heater, (4) is a thermostat, and (5)
Is a pot. (10) is a lid, (11) is a handle, (12)
Is a push button, (13) is a latch, (14) is a hinge shaft, (15)
Is a vapor cylinder, (18) is a heat insulating material, (20) is a reflector, (21) is a fixture, and (22) is a cap. Further, (25) is a lid heater attached to the lower surface of the lid body (10).

Usually, ABS resin or polypropylene resin is used for the lid (10) of this type. Then, as shown in the figure, a lid heater (25) and a reflection plate (20) are attached to the lower surface of the lid body (10). A latch (13) is fixed to the tip, and a hinge shaft (14) bearing or the like is provided at the other end. The bearing of the hinge shaft (14) serves as a rotation fulcrum when the lid (10) is opened and closed. Further, the latch (13) and the hinge shaft (14) support the weight of the main body (1) when carrying the rice cooker by holding the handle (11).

[Problems to be Solved by the Invention] As described above, the lid heater (25) and the reflector (20) are directly attached to the inner surface of the lid body (10) of the conventional rice cooker. Further, a latch (13) for supporting the weight when carrying the rice cooker and a hinge shaft (14) are provided in front of and behind the lid body (10). For this reason, if the rice cooker is carried around and the lid (10) is repeatedly opened and closed, the female screw for fixing the latch (13) will loosen and become stupid, and the bearing on the hinge side will wear and play will occur. become. Further, since the lid heater (25) with large electric power is provided, the lid body (10) may be heated and deformed as a whole. Once the bearing is worn or the lid (10) is deformed, a gap is created with the main body (1), heat and steam escape from the gap, wasting power, and significantly reducing rice cooking performance. Will be done. In particular, when the lid (10) is provided with an operating portion, there is a problem that the circuit element is affected by heat and malfunctions.

The present invention has been made to solve the above-mentioned problems of the conventional rice cooker, and the lid body is configured to be robust without deformation, and the heat of the lid heater affects the operating portion. It is the one that realizes a rice cooker with no exception.

[Means for Solving the Problem] The present invention configures an electric rice cooker provided with a lid support body which is arranged between an upper lid to which a lid heater is attached and an operation section and which holds the lid body.

Then, the lid support body is integrated with the synthetic resin support frame having high strength and high heat resistance after the reflector heater side reflector and the metal reinforcing plate on the operating portion side are stacked with the heat insulating material sandwiched therebetween. Combined to form a unit.

[Operation] Between the upper lid to which the lid heater is attached and the operating portion, a heat insulating material is sandwiched, and a reflector plate on the lid heater side and a metal reinforcing plate on the operating portion side are overlapped with each other to support the lid. The body is provided.
Also, a latch is fixed to the tip of the metal reinforcing plate with a screw,
The rear end is a hinge spring receiver. The heat directed to the upper side of the lid heater is reflected by the reflector plate of the lid support and is further blocked by the heat insulating material. Further, the lid support body reinforced by the reinforcing plate extending in the front-rear direction holds the entire lid body, and couples the lid body and the main body via the latch and the hinge.

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

Also in the embodiment of the present invention shown in FIGS. 1 to 3, there is a component similar to that of FIG.
Since the shapes and functions are different, a detailed description will be given here.

1 and 2, (1) is the case body, (2)
Is an outer pot attached inside 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 showing an appropriate amount of water for the capacity of rice is engraved in the inner pot (5), and is used for a flight for cooking rice. The inner pot (5) can be freely taken out from the outer pot (2). (6) is a premium receiver. (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). (11) is a hinge that opens and closes the lid (10), (12) is a hinge shaft, (13) is a hinge spring, and (14).
Is a latch corresponding to the latch receiver (6), (15) is a steam cylinder,
(16) is a push button. (17) is an inner lid and (18) is an upper lid. (18a) is a shaft, and (18b) 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 is formed into a spherical shape.
(17b) is a bowl-shaped rubber packing attached to the upper surface of the inner lid (17), and the inner lid (1
7) is elastically engaged with the shaft (18a) of the upper lid (18) and is detachably attached. (20) is a canned lid heater,
(28) is a lead wire.

(31) is a mounting plate. The mounting plate (31) crimps the two shafts (18a) and presses and fixes the lid heater (20) to the inner surface of the heat radiating portion (18b) of the upper lid (18). (32) is an upper lid frame made of synthetic resin, (33) is an upper lid packing, and a lid heater (2
The upper lid (18) fixing (0) is attached to the upper lid frame (32) from below via the packing (33).

(41) is a support frame having a notch (41a) in the hollow,
2) is an aluminum reflector with a recess (42a) in the center, (4
3) is a heat insulating material such as glass wool made according to the shape of the recess (42a), (44) is a reinforcing plate made of a slightly thick stainless steel that forms unevenness and bent portions for reinforcement, and these The elements are assembled in a unit manner to form a lid support (40). The support frame (41) is made of polyethylene terephthalate (PET), which is rigid and has high heat resistance, and has a structure in which heat resistance and durability for the lid heater (20) are taken into consideration. In addition, the recess (42a) of the reflection plate (42) is fitted into the hollow portion of the support frame (41) and overlapped. Reflector (4
2) When the support frame (41) is overlaid, the notch (41
The lead wire (28) of the lid heater (20) is inserted into the gap created by a). Also, when the rice cooker is assembled, the base plate of the latch (14) is fixed to the tip portion (44a) of the reinforcing plate (44) with a screw, and the rear end portion (44b) is a hinge spring (1).
It is a receipt of 3) and reinforces the joint between synthetic resin and metal. In addition to this, the reinforcing plate (44) is provided with a lid support (4
0) etc. and is fixed integrally with the lid (10) by heat or external force.
It also fulfills the function of preventing the entire deformation.

Reference numeral (50) is an operation section attached to the lid cover (10a) of the lid body (10), and (51) is an operation sheet in the operation section (50). (53) is a bottom plate, (54) is a printed board, (55) is an indicator mounted on the printed board (54) together with other circuit elements, and (56) is a plurality of pieces derived from the printed board (54). Is the lead wire. The bottom plate (53) is pressed against a partition formed on the lid (10) to hermetically accommodate the printed board (54) and the like inside.

In the electric rice cooker of the present invention having such a configuration, an appropriate amount of water designated as polished rice is put in the inner pot (5), the inner lid (17) is covered, and the lid body (10) is closed. Next, pull out the cord reel and connect the plug (9) to a 100V power outlet. Then, the display window (5
2) While watching the display, etc., the operation sheet (5
1) Operate to set the meal time reservation. At the rice cooking start time corresponding to the reserved meal time, the timer of the microcomputer operates to turn on the rice cooking heater (3) and the lid heater (20). The radiant heat radiated from the lid heater (20) cooperates with the heat generated from the rice cooking heater (3) provided in the lower portion of the inner pot (5) to effectively generate water inside the inner pot (5). The rice will be fully heated.

Cooking of rice starts 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 the boiling of water progresses and the water in the inner pot (5) decreases and the temperature rises sharply, the sensor (4)
Energizes the rice cooking heater (3) and the lid heater (20) so that the power is automatically stopped. As a result, the rice is cooked in the inner pot (5), and the cooked rice can be cooked evenly at the reserved time and the serving can be started. Push button (1
When 6) is pressed, the lid body (20) rotates about the hinge shaft (12) as a fulcrum by the elastic force of the hinge spring (13), the upper surface of the main body case (1) is opened, and freshly cooked rice is served.

In addition, in the above-mentioned embodiment, the hinge spring is provided in the hinge portion of the lid body and the electric rice cooker in which the lid body is automatically opened by the push button has been described as an example, but the latch is removed and the lid is opened by the handle. The present invention can be applied to a handle type rice cooker.

[Effects of the Invention] As described above, according to the present invention, the electric rice cooker provided with the lid support arranged between the upper lid to which the lid heater is attached and the operation portion is provided.

In particular, this lid support is formed as an integral structure by stacking a reflector heater-side reflector and a metallic reinforcing plate on the operating portion 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, the female screw for fixing the latch will not be stupid and the bearing on the lid will not be worn at all. In addition, even if a lid heater with a relatively large amount of power is provided, the lid support reflects and blocks heat, so that heat is concentrated in the direction of the inner pot and waste is not wasted in heating, and the lid is effectively used. There is almost no danger of the body being deformed by heating. As a result, power consumption and rice cooking performance are not deteriorated due to the deformation of the lid body, and the malfunction of the circuit element of the operation unit due to heat can be prevented.

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

[Brief description of drawings]

FIG. 1 is a structural explanatory view of an embodiment of the present invention, FIG. 2 is an internal view of a lid, FIG. 3 is an exploded perspective view of the lid, and FIG. 4 is a structural explanatory view of a conventional electric rice cooker. . 1 and 3, (1) is the case body, (2)
Is an outer pot, (3) is a rice cooking heater, (4) is a sensor, (5)
Is an inner pot, (6) is a latch receiver, (7) is a frame plate, (8) is a heat shield plate, (9) is a plug, (10) is a lid, (11) is a hinge, and (12) is a hinge. Shaft, (13) hinge spring, (14) latch, (15) steam cylinder, (16) push button, (17) inner lid, (18) upper lid, (20) lid heater, (28) ) Is a heater lead, (31) is a mounting plate, (32) is a top cover frame, (33) is a top cover packing, (41) is a support frame, (42) is a reflection plate, (43)
Is a heat insulating material, (44) is a reinforcing plate, (50) is an operation part, (51) is an operation sheet, (52) is a display window, (53) is a bottom plate, (54).
Is a printed board, (55) is an indicator, and (56) is a lead wire. The same reference numerals in the drawings indicate the same or corresponding parts.

Front page continued (72) Inventor Hiroaki Tsukahara 1728 Omaeda 1 Omaeda, Hanazono-cho, Osato-gun, Saitama Prefecture Mitsubishi Electric Home Equipment Co., Ltd. (72) Takao Oshima 1728 1 Omaeda, Hanazono, Osato-gun Saitama Prefecture 1 Mitsubishi Electric Home Equipment Co., Ltd. (72) Inventor Hideo Matsuki 1728 Omaeda, Maeda, Hanazono-cho, Saitama Prefecture Mitsubishi Electric Home Equipment Co., Ltd. (72) Keiji Suto 1728 1 Maeda, Hanazono, Saitama-gun 1 Mitsubishi Electric Home Equipment Co., Ltd. (56) Reference JP-A-2-26513 (JP, A)

Claims (3)

[Claims] 1. A case body in which a main heater for cooking rice is arranged on an inner bottom portion of an outer pot attached inside, and a case body in which the inner pot is interposed; one end of the case body is supported by a hinge; An electric rice cooker comprising a lid body which is provided with an operation portion on the upper surface of the attachment and is opened with the hinge as a fulcrum by a push button, and a lid heater provided on the bottom surface side of the lid body, wherein the lid heater is attached. The lid body is disposed between the upper lid and the operating portion, and the lid heater side reflecting plate and the operating portion side metallic reinforcing plate are overlapped with each other with a heat insulating material sandwiched therebetween and assembled in a unitary manner into a synthetic resin support frame to form the lid body. An electric rice cooker characterized by having a lid support for holding the. 2. The electric rice cooker according to claim 1, wherein a latch is fixed to one end of the reinforcing plate, and the other end is used to receive the end of the hinge spring. 3. The electric rice cooker according to claim 1, wherein a polyethylene terephthalate material is used for the support frame to form a hinge portion on the lid side.