JP3395745B2 - Electric rice cooker - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric rice cooker, and more particularly to an electric rice cooker having a compact structure. 2. Description of the Related Art Conventionally, as shown in FIG. 3, an electric rice cooker that is well known includes a rice cooker body 1 in which a rice cooker 3 is inserted and removed freely, and an inner bottom surface of the rice cooker body 1. And an electric heater 4 constituted by a heat plate 33 made of a good heat conductor and a heating element 34 embedded in the heat plate 33. A pair of terminals 36 and 36 serving as a power feeding portion to the heating element 34 are led downward from the heating plate 33. In the case of the electric rice cooker constructed as described above, since the terminals 36 and 36 are led downward, a space for terminal lead-out is required below the electric heater 4. The bottom of the rice cooker body 1 and the electric heater 4
The dimension H between the heating element 34 and the heating element 34 is inevitably high, and is usually about H = 60 mm. As a result, the overall height of the electric rice cooker has increased, which has become a bottleneck in achieving compactness. The present invention has been made in view of the above points, and it is an object of the present invention to make the product compact by devising the direction of lead-out of terminals in an electric heater. In the invention of claim 1, as means for solving the above-mentioned problems, a rice cooker main body for storing and unloading the rice cooker, and a lid for the rice cooker main body, In the electric rice cooker that is provided on the inner bottom surface of the rice cooker body and includes an electric heater composed of a heat plate made of a good heat conductor and a heating element embedded in the heating plate, to the heating element A pair of terminals that serve as power feeding sections of the heating plate are configured to be led out substantially horizontally from the heating plate , and the both terminals have a substantially horizontal shape.
Terminal boards facing each other are provided . The construction as described above makes it possible to reduce the space below the heating plate as compared with the conventional device in which the terminal is led downward from the heating plate. The dimension between the heating elements can be reduced. As a result, the height of the entire rice cooker body can be kept low. Also, the terminal boards are next to each other
Wiring work becomes easier. DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. As shown in FIG. 1 and FIG. 2, this electric rice cooker has a rice cooker main body 1 in which a rice cooker 3 is detachably stored.
And a lid 2 of the rice cooker body 1 and an electric heater 4 disposed on the inner bottom surface of the rice cooker body 1. The rice cooker body 1 has a space between a synthetic resin bottomed cylindrical outer case 5 constituting the outer peripheral surface and a sheet metal bottomed cylindrical inner case 6 constituting the inner peripheral surface. The upper end of the outer case 5 and the upper end of the inner case 6 are joined by an annular shoulder member 8 made of synthetic resin. The lid 2 is composed of a synthetic resin upper plate 9 constituting an outer surface and a synthetic resin lower plate 10 constituting an inner surface, and is surrounded by the upper and lower plates 9, 10. A heat insulating material 12 is disposed in the space portion 11. The lid 2 is rotatably and detachably attached to the rice cooker body 1 via a hinge unit 13 formed on one side (ie, the rear portion) of the shoulder member 8. A cylindrical portion 14 is formed at the center of the lid 2 so as to be suspended from the upper plate 9, and the steam generated during rice cooking is discharged into the cylindrical portion 14 to the outside. A pressure adjusting cylinder 16 having a steam discharge passage 15 is detachably attached. A ball valve 17 acting as a pressure regulating valve is disposed in the pressure regulating cylinder 16. A heat radiating plate 18 made of a good heat conductor (for example, aluminum alloy) for sealing the opening 3 a of the rice cooker 3 when the lid 2 is closed is attached to the lower end of the pressure adjusting cylinder 16. Reference numeral 19 denotes a steam inlet to the pressure regulating cylinder 16, 20 denotes a steam outlet from the pressure regulating cylinder 16, 21 denotes a steam outlet formed in the heat radiating plate 18, 2
2 is a seal packing that seals between the periphery of the heat sink 18 and the opening 3a of the inner pot 3, 23 is a seal packing that seals between the heat sink 18 and the lid lower plate 10, and 24 is a lid 2.
It is the lock mechanism which holds the closed state of. The shoulder member 8 is provided with a shoulder heater 25. The outer peripheral edge of the heat sink 18 is pressed against the shoulder heater 25 when the lid 2 is closed, and the heat sink 18 is heated by heat conduction from the shoulder heater 25. In other words, the shoulder heater 25 acts as a heating means for heating the heat radiating plate 18. The shoulder heater 25 includes a heater ring 26 having an inverted U-shaped cross section,
It consists of a heating element 27 disposed in the heater ring 26. An operation panel 28 having various switches and a display device is provided on the front side of the shoulder 8 in the rice cooker body 1 (that is, the anti-hinge unit side). A switch board 29 is disposed inside 28. On the outside of the peripheral wall portion 6a of the inner case 6,
A warming heater 30 is attached, and on the outside thereof,
A heat insulating material 31 is provided. On the front side of the space 7 in the rice cooker body 1 (ie, on the anti-hinge unit side), a control board 32 for controlling energization of the electric heater 4 is located outside the heat insulating material 31. It is arranged vertically. The electric heater 4 is a good heat conductor (for example,
A heating plate 33 made of an aluminum alloy) and a heating element 34 embedded in the heating plate 33.
3 is a disk portion 33a on which the bottom of the rice cooker 3 is placed;
The heating element 3 is integrally projected on the lower surface of the disk portion 33a.
4 includes a protruding portion 33b embedded therein, and a heat transfer portion 33c extending obliquely upward from the outer peripheral portion of the disk portion 33a along the outer peripheral portion of the rice cooker 3. The electric heater 4 is attached by fixing the hot disk portion 33a to the bottom of the inner case 6 with screws 35. An opening 37 is formed on the front side of the inner case 6 to lead out a pair of terminals 36 and 36 that serve as a power feeding portion of the electric heater 4. The terminals 36 and 36 are led out substantially horizontally from the heat plate 33 toward the front after crossing each other,
The terminals 36 and 36 are respectively provided with connection and connection terminal plates 38 and 38 facing each other in a substantially horizontal posture. If it does in this way, terminal boards 38 and 38 will adjoin, and it will become easy to do wiring work. The rear side of the bottom of the rice cooker body 1 (ie,
On the hinge unit side, a cord reel accommodating portion 40 for accommodating the cord reel 39 is formed, and a heat shield plate 41 is disposed above the cord reel accommodating portion 40. The heat insulating material 31 is placed on the heat shield plate 41. Furthermore, a heat-resistant heat insulating material 42 that suppresses downward heat radiation from the electric heater 4 is disposed at the bottom of the inner case 6. If it does in this way, the heat influence from the electric heater 4 to the cord reel 39 can be suppressed. When the electric heater 4 is structured as described above (that is, a structure in which the terminals 36 and 36 are led out to the front side), the facing side of the terminals 36 and 36 in the electric heater 4 becomes high temperature. Therefore, in the present embodiment, on the inner case 6 side corresponding to the high temperature portion of the electric heater 4,
A thermal fuse 43 is attached to a fixture 44 fixed to the shoulder member 8. A sensor hole 45 is formed in the center of the bottom surface of the inner case 6.
A center sensor 46 is provided in contact with the bottom of the rice cooker 3. In the present embodiment, as the center sensor 46, a sensor having a small dimension protruding below the mounting screw is employed. In the electric rice cooker constructed as described above, the following operational effects can be obtained. Since the terminals 36 and 36 are led out almost horizontally from the hot platen 33, the space below the hot platen 33 can be made smaller than in the conventional case where the terminals are led down from the hot platen. The dimension H between the bottom surface of the rice cooker body 1 and the heating element 34 in the electric heater 4 can be reduced. As a result, the overall height of the rice cooker body 1 can be kept low. Further, since the terminals 36 and 36 are led forward from the front side of the heating plate 33 toward the control board 32, the distance between the control board 32 and the terminals 36 and 36 is made as short as possible. As a result, wiring costs and the like can be reduced. Further, the terminals 36 in the electric heater 4,
Since the temperature on the 36 side is lowered, the temperature rise of the control board 32 can be prevented. According to the first aspect of the present invention, the rice cooker main body for storing and removing the rice cooker freely, the lid of the rice cooker main body, and the inner bottom surface of the rice cooker main body are provided. In the electric rice cooker comprising a heating plate made of a good heat conductor and a heating element embedded in the heating plate, a pair of terminals serving as a power feeding portion to the heating element Because it is configured to be led out almost horizontally from the board, the space below the heating board can be reduced compared to the conventional one where the terminal is led down from the heating board, and in the bottom of the rice cooker body and the electric heater There is an effect that it is possible to reduce the dimension between the heating element and the compactness while keeping the height of the whole rice cooker body low. In addition, both terminals face each other in a substantially horizontal posture.
By providing matching terminal boards, the terminal boards
The effect that the wiring work becomes easier because it is adjacent.
There are also fruits.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal sectional view of an electric rice cooker according to an embodiment of the present invention. 2 is a cross-sectional view taken along the line II-II in FIG. FIG. 3 is a cross-sectional view of a main part of a conventional electric rice cooker. [Explanation of Symbols] 1 is a rice cooker body, 2 is a lid, 3 is a rice cooker, 4 is an electric heater, 5 is an outer case, 6 is an inner case, 7 is a space, 32 is a control board, 33 is a hot platen , 34 is a heating element, 36 is a terminal, 3
8 is a terminal board, 39 is a cord reel, 40 is a cord reel housing, 41 is a heat shield, and 42 is a heat insulating material.

Claims (1)

(57) [Claims] [Claims] [Claim 1] A rice cooker body for freely storing and removing rice cookers, a lid of the rice cooker body, and an inner bottom surface of the rice cooker body, and a heat good conductor An electric rice cooker comprising an electric heater composed of a heating plate and a heating element embedded in the heating plate, wherein a pair of terminals serving as a power feeding unit to the heating element is connected to the heating plate. approximately configuration and Then horizontally derived from
Both the terminals face each other in a substantially horizontal posture.
An electric rice cooker characterized in that a terminal plate is provided .