JPH0128725Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a heating cooker equipped with an electric heater whose terminal portion protrudes downward from the bottom of an inner case.

[Technical background of the invention]

BACKGROUND ART In a heating cooker, such as a rice cooker, an inner case for storing a pot is disposed within an outer case, and this inner case is provided with an annular electric heater, such as a sheathed heater. This heater has both ends bent downward to form a straight line. Both ends protrude downward from the bottom of the inner case, and a power lead wire is connected to the terminal provided at the protruding end. are doing. Such a sheathed heater is constructed by enclosing a heating wire together with an insulating material such as magnesia in a metal tube, and the open portion of the protruding end is hermetically closed by an electrically insulating sealing member. In this case, due to its heat resistance, it is necessary to protect the sealing member from the thermal influence of the bottom of the inner case, which is heated to a high temperature when the sheathed heater generates heat. Therefore, the protruding end of the sheathed heater is extended downward. The sealing member is spaced as far away from the bottom of the inner case as possible.

[Problems with background technology]

Therefore, in order to prevent the tip of the terminal of the electric heater from interfering with the bottom of the outer case, it is necessary to ensure a gap greater than the protruding length of the end of the sheathed heater between the bottoms of both the inner and outer cases. There is a problem in that the height dimension becomes large and the material cost increases.

[Purpose of invention]

The present invention was developed in view of the above circumstances, and its purpose is to reduce the gap between the bottoms of both the inner and outer cases, and as a result, the height of the outer case can be set lower, contributing to material cost savings. To provide a heating cooker that can.

[Summary of the idea]

In the present invention, legs are formed at the bottom of the outer case in which the inner case is installed, and the terminals of the electric heater, which protrude downward from the bottom of the inner case, are positioned corresponding to the legs. The length of the legs is absorbed into the internal space of the legs in an amount commensurate with the depth of the legs, thereby reducing the gap between the bottoms of both the inner and outer cases.

[Example of idea]

An embodiment in which the present invention is applied to a rice cooker will be described below based on the drawings. Reference numeral 1 indicates an outer case having a cylindrical shape, for example, and reference numeral 2 indicates an inner case disposed within the outer case 1, in which a pot 3 is accommodated. 4 is a block-shaped insulator, which is fitted into an opening 2a formed at the bottom of the inner case 2;
As shown in FIG. 2, it has a pair of vertical holes 4a, 4a, and a central hole 4b located between these vertical holes 4a, 4a. Reference numeral 5 designates an annular electric heater disposed horizontally at the inner bottom of the inner case 2, which is constituted by a sheathed heater in which a coiled heating wire 7 is enclosed in a metal tube 6 together with an insulating material 8 such as magnesia. Then, both ends are bent downward in a straight line to form hanging ends 5a, 5a, and the hanging ends 5a, 5a are passed through the vertical holes 4a, 4a of the insulator 4 to the bottom of the inner case 2. It protrudes downward from. The open portions of the hanging end portions 5a, 5a are hermetically sealed by sealing members 9, 9 made of an electrically insulating material. In this case, in order to protect the sealing members 9, 9 from the thermal influence exerted by the annular part of the electric heater 5 through the bottom of the inner case 2 in terms of heat resistance, the sealing members 9, 9 are separated from the annular part by a predetermined distance. For this reason, the hanging end portion 5
a, 5a are elongated in the vertical direction.

Reference numeral 10 denotes a holding plate having a through hole 10a in the center, which is placed on the insulator 4 so as to sandwich the electric heater 5 therebetween. The electric heater 4 is held in place by inserting the nut 12 through the screw 4b and screwing the nut 12 onto the lower end of the screw 11. 13, 13 are terminal portions, which penetrate through the sealing members 9, 9 of the electric heater 5 and are attached in an airtight state,
The upper end is connected to both ends of the heating wire 7, and the lower end is bent in the middle into a substantially U-shape (this part is called the U-shaped part 1).
4a, 14a) Lead wires 14, 1 for power supply
Connected to 4. Reference numeral 15 denotes a bottom plate of the outer case 1 having an annular wall 15a on the outer periphery, and this is attached to the outer case 1 with the upper edge of the annular wall 15a butted against the lower edge of the outer case 1. Therefore, the annular wall portion 15a forms part of the side wall of the outer case 1, and the bottom plate 15 forms the bottom of the outer case 1. For example, four legs 16 to 18 having a depth of 20 to 30 mm are provided on the outer peripheral edge of the bottom plate 15.
(only three are shown) are formed so as to bulge downward, and the leg portions 16 of these are located corresponding to the terminal portions 13, 13 of the electric heater 5, and are wider than the leg portions 17, 18. terminal part 13,1
3 is acceptable. Then, the terminal parts 13, 13 of the electric heater 5 are connected to the lead wires 14, 14.
It is housed in a space 16a in the leg part 16 together with the U-shaped parts 14a, 14a. In addition, the leg portion 16
A pair of drain holes 19, 19 are provided at the bottom of the lead wire 1.
4 and 14 to face the U-shaped portions 14a and 14a. Note that 20 is an opening/closing lid rotatably supported on the outer case 1, and 21 is a control panel attached to the outer surface of the outer case 1.

According to the above configuration, the sealing member 9 is connected to the electric heater 5
Although the hanging end portions 5a, 5a have to be made longer in order to protect them from the thermal effects of 16, the vertical length of the hanging end portions 5a, 5a can be absorbed by an amount commensurate with the depth dimension (20 to 30 mm) of the leg portion 16. Accordingly, the distance in the vertical direction between the bottom of the inner case 2 and the bottom plate 15 can be shortened by the same amount as described above, so that the vertical length, that is, the height, of the outer case 1 can be shortened, and material costs can be saved.

Furthermore, when cleaning the inside of the inner case 2, cleaning water is transferred to the hanging end portions 5a, 5a through the gap between the insulator 4 and the peripheral edge of the opening 2a, and is used for the terminal portions 13, 13 and the power source. Even if the cleaning water flows down along the lead wires 14, 14, the cleaning water will not reach the U-shaped portion 14.
a, 14a, falls into the leg portion 16, and is discharged to the outside through drain holes 19, 19. Therefore, there is no risk that the cleaning water will flow through the lead wires 14, 14 and wet other electrical components, and there is no risk that the cleaning water will accumulate in the leg portion 16, leading to the lead wires 14, 14, the terminal portions 13, 13.
The advantage of this embodiment is that the hanging end portions 5a, 5a including the sealing member 9 are not immersed, and poor insulation is prevented.

By the way, the capacity of the rice cooker is 1.5, 2.0, for example.
When changing models to larger models such as 2.7 and 2.7, it is conceivable to increase the size of the pot in the radial direction, for example, from the viewpoint of stability. The dimensions of parts such as the bottom plate and opening/closing lid must be changed, making it impossible to standardize them. On the other hand, according to this embodiment, since the vertical length of the outer case 1 can be short, the overall stability can be maintained even if the outer case 1 and the pot 3 are made longer in the vertical direction instead of in the radial direction. As a result, an increase in capacity can be achieved by increasing the size in the height direction, and at least the bottom plate 15 and the open lid 20 are not subject to dimensional changes, so at least These bottom plates 1
5 and the opening/closing lid 20 can be made common.

[Effect of idea]

As explained above, the present invention is characterized in that the terminal portion of the electric heater is positioned corresponding to the leg portion formed by protruding from the bottom of the outer case, and as a result, the terminal portion is positioned at a predetermined distance from the bottom of the inner case. Even though there is a need to separate the terminals from each other, the terminals can be accommodated in the internal space of the legs, which reduces the gap between the bottoms of both the inner and outer cases, allowing the outer case to be short and contributing to a reduction in material costs. be.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, with FIG. 1 being a cutaway front view and FIG. 2 being an exploded perspective view of the main parts. In the figure, 1 is the outer case, 2 is the inner case, 3 is the pot,
5 is an electric heater, 5a is a terminal portion, 14 is a lead wire, 14a is a U-shaped portion, 16 to 18 are leg portions, 1
9 is a water drain hole.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. An electric heater having a terminal portion protruding downward from the bottom of the inner case is provided at the inner bottom of the inner case for storing a pot, and an outer case in which the inner case is installed. 1. A cooking device characterized in that a leg portion bulging downward is formed at the bottom, and a terminal portion of the electric heater is positioned corresponding to the leg portion. 2. While the legs have drain holes, the lead wires connected to the terminals of the electric heater are bent into a roughly U-shape in the middle, with the U-shaped portion facing inside the legs. A heating cooker according to claim 1 of the claimed utility model registration.