JPH09102383A - Manufacture of heater board for electric heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent such problems that a heating wire is expanded to lose tension, the heating wire generates a warp, the heating wire is brought into contact with the adjacent one, a current does not flow normally in the heating wire, the heating wire is partially heated to a high temperature, the heater is opened, or an unexpected accident occurs as a heater board is used many times. SOLUTION: Notch grooves 11, 11' are provided at constant intervals on the outer periphery. Two heat-resistant insulating core plates 10, 10' provided with notches 12, 12' are flatly arranged between the notch grooves 11, 11', and a main heating wire 13 is wound from one side to the other side in the notch grooves 11, 11' of the core plates 10, 10'. Insulating thin materials 14, 14' having proper shapes are provided on the upper and lower outer faces, an auxiliary heating wire 15 is wound in the notches 12, 12', the outside is integrally covered with an insulating plate 19 so that adjacent heating wires are not brought into contact with each other.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to, for example, an electric rice cooker,
The present invention relates to a method for manufacturing a heater board for various electric heaters having a flat plate heater, such as an electric pot.

[0002]

2. Description of the Related Art Conventionally, in various electric heaters such as electric rice cookers and electric pots, a flat plate-shaped electric heater is built in a heating portion, and the electric heater is composed of two heat-resistant insulating plates. BACKGROUND ART There is a structure in which a main heating wire is wound in series, an auxiliary heating wire is wound between the main heating wires, and the outside is covered with an insulator to be integrally configured.

[0003]

SUMMARY OF THE INVENTION In the foregoing,
As the number of times of use increases, the heating wire expands and the tension disappears, the heating wire bends, and the heating wire may come into contact with an adjacent one in the middle, causing the electricity to not flow normally or partially. It was heated up to a high temperature, and somehow it was disconnected, which caused an unexpected accident.

[0004]

Therefore, the present invention has been proposed in order to eliminate the above-mentioned inconvenience, and its structure is to provide notched grooves at regular intervals on the outer circumferences of the core plate which face each other.
Two heat-resistant insulating core plates provided with cuts between the notched grooves are arranged in a plane, and the main heating wire is wound in the notched grooves of the core plate from one side to the other, and on the upper and lower outer surfaces thereof. The auxiliary heating wire is wound around the notch with an insulating thin material of an appropriate shape interposed, and the outside is covered with an insulating plate to be integrally configured.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1, 2, and 3 show a manufacturing method of the present invention, in which 1 is a flat plate-shaped heater plate, and two mica (mica) and the like. Heat insulating core plate 1
0 and 10 'are arranged in a plane as shown in FIG. 1, and cutout grooves 11 and 11' are provided at regular intervals on the outer circumference thereof, and cuts 12 and 12 'are provided between the cutout grooves 11 and 11'. The main heating wire 13 is wound from one of the cutout grooves 11 and 11 'of the core plates 10 and 10' to the other. The core plate 10, 10 '
On the upper and lower outer surfaces of the core plate 10 and 10 ', having substantially the same size,
Alternatively, insulating thin articles 14, 14 having an appropriate size such as a band shape
The auxiliary heating wire 15 is wound around the notches 12 and 12 ′ with the interposition of ′ ′. Reference numerals 16 and 16 'are locking holes, 17 and 17' are locking small holes, 18 and 18 'are engaging grooves, and 19 is an insulating plate covering the outside.

According to the present invention, as shown in FIG. 1, the core plates 10 and 10 'are opposed to each other, and the main heating wire 13 is inserted through the locking hole 16 of the core plate 10 on the left side of FIG. Notch groove 11 on top
Winding from the next notch groove 11 to the notch groove 11,
When it comes down, it is inserted from the engaging hole 16 into the engaging hole 16 'of the adjacent core plate 10' on the right side of FIG. 2, and engages from the notch groove 11 'to the notch groove 11', It is inserted into the locking hole 16 '. Next, the core plates 10 and 10 around which the main heating wire 13 is wound.
The insulating thin material 1 such as mica having substantially the same size as the core plates 10 and 10 ′ or an appropriately sized band such as a band is formed on the upper and lower surfaces of the ′ ′.
The auxiliary heating wire 15 is cut from the cut 12 through the locking small hole 17 in the upper part of the core plate 10 with the interposition 4, 4 '.
When wound into 2, and when it comes down, it engages with the engagement groove 18, engages with the engagement groove 18 'of the adjacent core plate 10', and then engages with the notch 12 'to the notch 12'. It is inserted through the upper locking small hole 17 ′, and the outside thereof is covered with the cover plate 19.

[0007]

The present invention is configured as described above, and is provided between the notch groove 11 and the notch groove 11 and the notch groove 11.
Only the main heating wire 13 is wound between the ′ and the notch groove 11 ′, and the auxiliary heating wire 1 is provided between the notches 12 and 12 and between the notches 12 ′ and 12 ′.
Since only 5 is wound, the thin insulating materials 14 and 14 'are interposed between the main heating wire 13 and the auxiliary heating wire 15, and the auxiliary heating wire 13 and the auxiliary heating wire 13 are interposed. Since the heating wire 15 does not exist, the heating wire expands and the tension disappears as the number of times of use increases, and even if the heating wire is bent, the auxiliary heating wire 15 is provided between the main heating wire 13 and the main heating wire 13. , There is no main heating wire 13 between the auxiliary heating wire 15 and the auxiliary heating wire 15, the space between the heating wires is wide, and the adjacent heating wire is in contact with the adjacent heating wire in the middle thereof. It is safe to use because electricity does not flow normally, partial heating causes high temperature, or disconnection causes unexpected accident. The present invention is advantageous in that it is easy to manufacture and inexpensive. Unlikely to.

[Brief description of the drawings]

FIG. 1 is a plan view showing an arrangement of core plates used in the present invention.

FIG. 2 is a plan view in which a main heating wire is wound around a core plate.

FIG. 3 is a plan view in which an insulating thin material is interposed between upper and lower surfaces of a core plate on which a main heating wire is wound, and an auxiliary heating wire is wound thereon.

FIG. 4 is a partially cutaway plan view of a heater panel constructed according to the present invention.

[Explanation of symbols]

 1 Heater board 10 Core plate 10 'Core plate 11 Notch groove 11' Notch groove 12 Notch 12 'Notch 13 Main heating wire 14 Insulation thin material 15 Auxiliary heating wire 19 Cover plate

Claims (1)

[Claims] 1. A heat-resistant and insulating core plate provided with notched grooves at regular intervals on its outer periphery and having a notch between the notched grooves is arranged in a plane, and one of the notched grooves of the core plate is provided. The main heating wire is wound from one side to the other, insulating thin materials of appropriate shape are interposed on the upper and lower outer surfaces, the auxiliary heating wire is wound in the notch, and the outside is covered with an insulating plate to form an integral structure. A method of manufacturing a heater panel for electric heaters.