JPS635630Y2 - - Google Patents

Description

[Detailed Description of the Invention] Technical Field of the Invention The present invention relates to an improvement in an electric heater mounting device for a heating cooker, in which both ends of an electric heater are supported by insulators and fixed under pressure by a presser cover.

Conventionally, in a rice cooker, a sheathed heater is disposed at the inner bottom of an inner case of the main body, and a pot is heated by the sheathed heater. In such rice cookers, the sheathed heater is fixed to the inner case via an insulator, but both ends are insulated seals with terminals, so water droplets from the pot should not get on them. In order to do this, generally both ends are pressed and fixed by a presser cover which is tightened with screws and nuts.

Problems with the Background Art However, with the above configuration, when the pot is set in the inner case with water attached to the outer periphery of the pot, or when water is accidentally spilled into the inner case, the presser foot cover is provided to catch water. There is a risk that the screw will penetrate downward from the screw insertion hole and leak the insulating seals at both ends of the sheathed heater, and the insulation of the insulating seals will deteriorate, causing electrical leakage to the protective tube and the like. Furthermore, during the process of tightening the presser cover screws, bending force is applied between the tightening portion and the presser portion of the sheathed heater, resulting in the insulator being susceptible to cracking.

Purpose of the invention Therefore, the purpose of the present invention is to prevent the insulation from deteriorating at both ends of an electric heater due to water leakage, and to prevent cracking of the insulator during the process of attaching the presser cover, using an extremely simple structure. An object of the present invention is to provide an electric heater mounting device for a heating cooker.

Summary of the invention The present invention has a configuration in which the presser foot cover is attached by elastic engagement, eliminating holes for attachment and preventing water from penetrating through the hole, and making the upper surface of the presser cover an inclined surface. The present invention is characterized by preventing water from adhering to both ends of the electric heater by forming the presser cover so that the water applied to the upper surface of the cover flows out in a desired direction.

Embodiment of the invention An embodiment of the invention will be described below with reference to the drawings. First, in FIG. 1, reference numeral 1 denotes an outer case of a rice cooker, which is a heating cooker, and an inner case 2 formed in a cylindrical shape with a bottom is installed inside this via a heat insulating material 3. A flange portion 4 is formed at the top opening. Reference numeral 5 denotes a pot, which is removably housed in the inner case 2 by placing its top opening edge 5a on the flange 4, and forms a gap 6 between it and the inner case 2. are doing. Reference numeral 7 denotes a guide cylinder integrally formed in a bulge approximately at the center of the inner bottom of the inner case 2. Reference numeral 8 denotes a support plate, which is attached to the outer bottom of the inner case 2 with screws 9 while being located on the lower surface of the guide tube 7. A temperature sensing mechanism 10 is supported.
Reference numeral 11 denotes a substantially annular sheathed heater, which is an electric heater, and is attached by a fixture 13 to an insulator 12 fixed to the inner bottom of the inner case 2, which corresponds to a base body. Both ends 11a, 11a of the sheathed heater 11 are bent downward, and terminals 11b, 11a are bent downward for connection to a connector (not shown).
1b. 2 to 4 show the fixing structure of both ends 11a, 11a of the sheathed heater 11, which will be described in detail below. That is, 14 is a relatively long fitting hole with a slightly circular arc formed at the bottom of the inner case 2 close to the outer circumference of the support plate 8, and semicircular drain holes 14a are provided at both ends of the fitting hole 14. ,1
4a are formed continuously. 15 is an insulator formed into an elongated rectangular shape, which is inserted into the fitting hole 14.
The lower portions of protrusions 15a, 15a, which are formed in a slightly circular arc corresponding to the circumferential sides of the protrusions 15a, are fitted into the fitting hole 14 from above. Screw holes 16, 16 are provided in support pieces 8a, 8a integrally extending from the outer edge of the support plate 8.
It is fixed by screwing in screws 18, 18 passed through insertion holes 17, 17 formed in the insulator 15. A pair of through holes 19, 19 are formed in the insulator 15, passing through it vertically, and both ends 11a, 11a of the sheathed heater 11 are inserted through these through holes 19, 19 and led out downward. There is. Reference numeral 20 denotes a presser cover made of an elastic material, the upper surface of which is formed into an inclined surface that descends on both sides in the longitudinal direction with the center as the apex, and the upper part of the insulator 15 is fitted on both edges along the longitudinal direction. Fitting piece 20
a, 20a are formed downward, and the protrusions 15a, 15a of the insulator 15 are formed on the fitting pieces 20a, 20a.
Engagement pieces 20b, 20b serving as engagement portions are provided in a protruding manner corresponding to engagement holes 21, 21 formed approximately at the center of the body. The presser cover 20 has an engaging piece 20
b, 20b into the husband engagement holes 21, 21,
It is attached to the insulator 15 by elastic engagement, and both ends of the sheathed heater 11 supported by the insulator 15 are pressed and fixed.

Next, the operation of this embodiment configured as above will be explained. When cooking rice, first remove the pot 5 from the inner case 2, put the rice in the pot 5, wash the rice in a sink, etc., and then store the pot 5 in the inner case 2. When washing rice, water adhering to the outer surface of the pot 5 often drips into the inner case 2, and water may also spill into the inner case 2. Even in such a case, since the upper surface of the presser cover 20 is an inclined surface, water dripping onto the upper surface of the presser cover 20 immediately flows along the slope and drips from both sides in the longitudinal direction. This dripping water does not accumulate inside the inner case 2 and is removed from the drain hole 1.
4a, 14a into the outer case 1, there is no risk of wetting the insulating seals at both ends 11a, 11a of the sheathed heater 11. Therefore, both ends 11a, 11a of the sheathed heater 11 due to water wetting
Deterioration of insulation can be reliably prevented. In addition, since the presser cover 20 is attached by elastic engagement with the engagement pieces 20b, 20b, unlike the conventional method using screws, the attachment is extremely easy, and when attached, the engagement pieces 20b, 20b are attached. Since no excessive bending force is applied between the mounting portion and the pressing portions of the sheathed heater 11 on both sides in the longitudinal direction, there is no risk of the insulator 15 cracking.

Effects of the invention As is clear from the above explanation, the present invention allows the presser foot cover to be attached by elastic engagement of the engaging portion, which simplifies the installation work and prevents the installation work from occurring where there is a risk of water penetration. There is no need to provide a hole for this purpose, and the top surface of the presser cover is sloped, so
An electric heater installation for a heating cooker that has a very practical effect in that water dripping on the top surface of the presser cover can be flowed away in a desired direction and that insulation deterioration at both ends of the electric heater due to wetting can be prevented. equipment can be provided.

[Brief explanation of the drawing]

The drawings relate to an embodiment in which the present invention is applied to a rice cooker.
The figure is a partially enlarged longitudinal sectional view, FIG. 3 is an enlarged exploded perspective view of the main part, and FIG. 4 is an enlarged longitudinal sectional front view of the main part. In the figure, 2 is an inner case (base body), 11 is a sheathed heater (electric heater), 15 is an insulator, 20 is a presser cover, 20b is an engagement piece (engagement part), and 21 is an engagement hole.

Claims (1)

[Scope of utility model registration request] Both ends of the electric heater are supported by insulators attached to a base body and fixed by pressing with a presser cover, wherein the upper surface of the presser cover is formed into an inclined surface and an engaging portion is provided protrudingly at a predetermined portion, An electric heater attachment device for a heating cooker, wherein an engagement hole is formed in the insulator, and the cover is attached to the insulator by elastically engaging the engagement portion with the engagement hole.