JPH03116678A - Induction heating cooker - Google Patents

Abstract

PURPOSE:To constantly keep a gap between a heating coil and a cooking plate by fixing the lead wire terminal of a heating coil to a coil fixing base, and also connecting the terminal to a drive circuit part with a conductive wire. CONSTITUTION:The lead wire terminal 13a of an induction heating coil 14 is fixed to a coil fixing base 15, and also the terminal 13a and a drive circuit part 20 are connected to each other with a conductive wire 19. Thus even the lead wire 13 of the heating coil 14 is hardened with varnish etc., its terminal is fixed to the coil fixing base 15, and the terminal 13a and the drive circuit part 20 are connected to each other with the conductive wire 19 to which no varnish etc., is stuck. This causes the pressing structure of the coil supporting base to be not influenced, and permits a gap between the heating coil and a cooking plate to be kept constant.

Description

[Detailed description of the invention] Industrial applications The present invention relates to an induction heating cooker.

BACKGROUND OF THE INVENTION FIG. 2 shows the structure of a conventional induction heating cooker. In FIG. 2, 1 is a main body of an induction heating cooker having a cooking plate 2 on the upper surface, a heating coil 3 is arranged under the cooking plate 2, and the heating coil 3 is held on a coil fixing base 4. This coil fixing base 4 has spacing members 5 arranged on both sides of its upper surface, and its lower part is pressed and supported by an elastic support member 6 made of a coil spring, so that a constant distance is maintained between the heating coil 3 held at the upper part and the cooking plate 2. It is constructed to ensure a gap between 7 is heating coil 3
A printed circuit board constituting a drive circuit is disposed at the bottom of the main body 1, and the terminals of lead wires 8 at both ends of the heating coil 3 are connected to this printed circuit board.

Problems to be Solved by the Invention Incidentally, in such an induction heating cooker, the heating coil 3 is usually formed into a disk shape by curing varnish or resin coated on the surface of the coil 3, so the varnish or coating resin is heated. It may also adhere to the lead wire 8 portion of the coil 3 and harden to the extent that the lead wire 8 cannot be easily bent. Therefore, when fixing the lead wire 8 to the printed circuit board 7, it is necessary to pull the heating coil 3 downward to guide the heating coil 3 to the printed circuit board 7, depending on the length of the lead wire 8 and the hardening state of the varnish or the like. When this tensile force becomes larger than the biasing force of the elastic support member 6 supporting the coil fixing base 4, the elastic support member 6 is compressed and the spacing member 5 no longer comes into close contact with the cooking plate 2. That is, there was a problem in that the pressing effect of the elastic support member 6 against the coil fixing base 4 was lost, and the gap between the cooking plate 2 and the heating coil 3, which is important for the performance of the induction heating cooker, could not be kept constant.

The present invention solves these conventional problems,
Even if the lead wire of the heating coil hardens due to adhesion of varnish, etc., it will not affect the pressing structure of the coil fixing base when connecting the heating coil and the drive circuit, and the gap between the heating coil and the cooking plate will be reduced. The object of the present invention is to provide an excellent induction heating cooker that can maintain a constant temperature.

Means for Solving the Problems In order to achieve the above object, the present invention fixes the lead-out wire end of an induction heating coil to a coil fixing base, and connects this end to a drive circuit section with a conductive wire. .

Therefore, according to the present invention, even if the bowed wire of the heating coil is hardened by varnish or the like, its terminal is fixed to the coil fixing base, and this terminal and the drive circuit section are connected to each other using a conductive wire that is not coated with varnish or the like. Since the connection is made with a wire, the pressing structure of the coil holder is not affected, and the gap between the heating coil and the cooking plate can be kept constant.

Embodiment FIG. 1 shows the configuration of an embodiment of the present invention. In Fig. 1, reference numeral 11 denotes the main body of the induction heating cooker, a cooking plate 12 is provided on the top surface, and a drawer #1 is provided at the bottom of the cooking plate 12.
A heating coil 14 having Ia13 is arranged and held on a coil fixing base 15. The coil fixing base 15 is pressed from below by an elastic support member 17 with a spacing member 16 interposed between the coil fixing base 15 and the cooking plate 12, so that a certain gap is secured between the heating coil 14 and the cooking plate 12.

Reference numeral 18 denotes a terminal board, which is attached to the lower surface of the coil fixing base 15, and the ends 13a of each lead wire 13 at both ends of the heating coil 14 are connected to this terminal board 18. Reference numeral 19 denotes a conductive wire, one end of which is connected to a printed circuit board 2o forming a drive circuit for the heating coil 14 at the bottom of the main body 11, and the other end connected to a terminal board 18 on the bottom surface of the coil fixing base 15.

Next, the operation of the above embodiment will be explained. In the above embodiment, the terminal 13a of the lead wire 13 of the heating coil 14
is connected to the terminal board 18 of the coil fixing base 15, and
By connecting this terminal board 18, that is, the end 13a of the lead wire 13 and the printed circuit board 20 with the conductive wire 19, the connection between the heating coil 14 and the printed circuit board 20 is made possible by the pressing force of the elastic support member 17 against the coil fixing base 15. No interference. That is, by connecting the lead wire 13 of the heating coil 14 to the terminal board 18 of the coil fixing base 15, even if the lead wire 13 loses its flexibility due to hardening of the varnish or coating resin, the force required to bend it can be reduced. does not act on the elastic support member 17 that presses the coil fixing base 15, so that the pressing effect can be maintained.

Further, since the terminal 13a of the lead wire 13 and the printed circuit board 20 are connected by the conductive wire 19, it is sufficient to use a conductive wire 19 with sufficient flexibility. The effects of this can be prevented.

In this way, according to the above embodiment, even if the lead wire 13 of the heating coil 14 has lost its flexibility, the heating coil 14
The connection between the heating coil 14 and the printed circuit board 20 constituting its drive circuit does not affect the pressing effect of the coil fixing base 15 by the elastic support member 17. It has the advantage of being able to maintain a constant gap with 12.

Effects of the Invention As is clear from the above embodiments, the present invention fixes the lead wire terminal of the induction heating coil to a coil fixing base, and connects this terminal and the drive circuit section with a conductive wire. Even if the lead wire part loses its flexibility due to hardening of varnish or coating resin, it will not affect the pressing structure against the coil fixing base.
This has the advantage that the gap between the heating coil and the cooking plate can be kept constant, and the performance of the induction heating cooker main body can be maintained well.

[Brief explanation of drawings]

FIG. 1 is a schematic sectional view of an induction heating cooker according to an embodiment of the present invention, and FIG. 2 is a schematic sectional view of a conventional induction heating cooker. DESCRIPTION OF SYMBOLS 11... Main body of induction heating cooker, 12... Cooking plate, 13... Leading wire, 13a... Terminal, 14
...Heating coil, 15...Coil fixing stand, 16...
- Spacing member, 17... Elastic support member, 18.
...terminal board, 19...conductive wire, 20...printed circuit board.

Claims (1)

[Claims] A cooking plate provided on the top surface of the main body, a coil fixing base for holding a heating coil arranged at the lower part of the cooking plate, an elastic support member for pressing the coil fixing base from below against the cooking plate side, and an elastic support member inside the main body. and a drive circuit section for the heating coil arranged, a lead wire terminal of the heating coil is fixed to the coil fixing base, and the terminal and the drive circuit section are connected by a conductive wire. An induction heating cooker.