JPS6214059B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a wiring device for an electric heating cooker, and in particular, it is an object to provide a wiring device that has a small number of parts, can be assembled easily and reliably, and is inexpensive and highly reliable.

Conventional wiring for electric heating cookers involves welding terminals 2 to both ends of a heating element 1, as shown in FIG.
was held by an insulator 3 made of ceramic or the like. Therefore, the wiring was carried out by screwing a lead plate 4 made of a metal plate to the terminal 2 as shown in the figure. However, this structure has a large number of parts, which increases the cost.Moreover, the combination of the pipe 5 that houses the heating element 1 and the insulator 3 is very fragile against impacts and is often damaged during transportation. In addition, the terminal 2 becomes hot at the screw-fastened portion, resulting in loosening. As a solution to these problems, there is a known device as shown in FIGS. 2 and 3 in which the insulator made of ceramic is eliminated and the heating element and the lead plate are directly welded. In the case of the structure shown in FIG. 2, an insulator 7 is fixed to the side wall 6 forming the cooking chamber, and a heating element 9 made of a wire is welded to the tip of a metal plate 8 supported by the insulator 7. However, when the heating element 9 made of wire and the metal plate 8 are welded by resistance welding, the contact area between the two is extremely unstable, and as a result, the welded area is Since the current density becomes extremely unstable, large variations occur in the welding strength.

In addition, compared to the welding of the heating element 1 and the terminal 2 shown in FIG. 1, if the welded part comes off, in the configuration shown in FIG. Not having one is a fatal problem in terms of safety. Furthermore, the combination of the end surface of the pipe 10 and the end surface of the rigid metal plate 8 has the disadvantage that when a thrust direction impact is applied to the pipe 10, the pipe 10 is extremely easily damaged. Third
In the case of the structure shown in the figure, an elastic metal wire 1
1 is suspended between two pipes 13 through an insulator 12 near the center, and the end face of the pipe 13 is held by a metal fitting 14 to prevent it from coming off in the thrust direction through the insulator 12. However, constantly applying a load in the direction of the end surface of the pipe 13 requires a retainer 15 to prevent the pipe 13 from moving in the thrust direction. In addition, in the event that the end surface of the pipe 13 is damaged due to impact or the like, there is a possibility that the metal wire 11 will come into contact with the side wall forming the cooking compartment and cause an electric shock.
Furthermore, this structure has the disadvantage that it can only be configured by being suspended between the pipes 13.

The present invention solves the above-mentioned conventional problems, and embodiments of the present invention will be described below with reference to the accompanying drawings.

In FIGS. 4 and 5, reference numeral 16 denotes a side wall forming a substantially box-shaped cooking chamber, which suspends and supports a pipe 17 vertically together with the opposing side wall (not shown). 18 is a heating element made of a wire housed in the pipe 17;
Reference numeral 9 denotes a lead wire made of an elastic wire made of stainless steel or the like, and this lead wire 19 is inserted into the pipe 17 with its tip bent, and its end is placed outward from the end surface of the pipe 17 of the heating element 18. It is welded in a state where it intersects with the protruding end, and the other end forms a welded part with the heating element 18 as described above, or is provided with a connecting terminal 20. Further, the lead wire 19 is provided with a cylindrical insulator 21 near the center thereof, and is held on the side wall 16 by a metal fitting 22 via the insulator 21. At this time, the lead wire 19 is bent so that a distance is maintained between the end of the lead wire 19 and the end surface of the pipe 17, or the lead wire 19 is not pressed against the end surface of the pipe 17.
Although not shown, by wiring lead wires similar to those described above to the opposing side walls, the pipe 1
Even when a load is applied to the pipe 7 in the thrust direction, the end face of the pipe 17 can be received by the smooth surface of the lead wire 19, and the impact can be softened by the elasticity of the lead wire 19. Further, even if the end face of the pipe 17 is damaged in the worst case, the lead wire 19 will not touch the side wall 16 because the lead wire is insulated and maintained so as to maintain a distance from the end face of the pipe 17.

As is clear from the above explanation, the wiring device of the present invention has fewer parts than the conventional wiring device, is cheaper, has less possibility of pipe damage, and in the worst case, there is no risk of electric shock even if the pipe end is damaged. , is extremely effective.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a conventional toaster oven wiring device, FIG. 2 is a sectional view of another conventional toaster oven, FIG. 3 is a perspective view of another conventional toaster oven wiring device, and FIG. 4 is a perspective view of a conventional toaster oven wiring device. FIG. 5 is a front view of a wiring device for a toaster oven showing one embodiment of the present invention. FIG. 5 is an exploded perspective view of the main parts. 16...Side wall, 17...Pipe, 18...Heating element, 1
9...Lead wire, 21...Insulator.

Claims (1)

[Claims] 1. A pipe suspended between opposing side walls of a substantially box-shaped cooking cabinet, a heating element made of a wire rod inserted into this pipe, and the side walls so as to maintain a distance between each end face of the pipe. A lead wire made of an elastic wire material insulated and maintained inside and outside the refrigerator is provided, and the lead wire and the end of the heating element made of the wire material that protrudes outward from the pipe end surface are welded in a crossing state. Wiring device for electrically connected electric heat cooker.