JP4411765B2 - Electromagnetic cooker - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electromagnetic cooker that heats and cooks ingredients in a pan by generating an eddy current at the bottom of the pan.
[0002]
[Prior art]
In general, the above-mentioned electromagnetic cooker has a table called a top plate disposed above a heating coil supported by a coil base with an appropriate gap, and an iron pan is placed on the top plate. When a high-frequency current is passed through the heating coil, the lines of magnetic force pass through the top plate and pass through the bottom of the pan, creating an eddy current at the bottom. The pan generates heat due to the Joule heat of this eddy current and heats the ingredients inside. The heating coil is formed in a disk shape after litz wires are wound in a spiral shape and the wires are fused and solidified. For the top plate, for example, a heat-resistant ceramic plate that easily transmits magnetic lines of force is used.
[0003]
[Problems to be solved by the invention]
In such an electromagnetic cooker, conventionally, an adhesive is used to fix the heating coil to the coil base. That is, FIG. 4 is a back view showing a conventional configuration of a coil base that supports a heating coil. From the back side of the coil base 1 having radial spokes 1a, a heat-resistant corner is formed between the heating coil 2 and the spoke 1a. An adhesive 3 is applied, and the heating coil 2 is fixed to the coil base 1. However, this method has a problem that a lot of man-hours are required for applying and drying the adhesive, and the heat-resistant adhesive has a high material cost.
[0004]
On the other hand, conventionally, the height position of the coil base supporting the heating coil and the top plate above the coil base are determined separately in the electromagnetic cooker box. For this reason, there is a problem that the gap between the heating coil and the top plate is likely to vary due to an error in sheet metal accuracy of the electromagnetic cooker box, and as a result, the heating power is not constant. Conventionally, when a pan is placed on the top plate, the top plate is bent due to sinking in the above gap range, which also affects the size of the gap, and in some cases, the top plate is cracked. There was a problem that occurred.
[0005]
The object of the present invention is to address these problems, simplify the fixing of the heating coil on the coil base, improve the accuracy of the gap between the heating coil and the top plate, and prevent the deflection of the top plate There is to do.
[0006]
[Means for Solving the Problems]
In the electromagnetic cooker in which a disc-shaped heating coil is supported by a coil base and a top plate on which a pan is placed is disposed above the heating coil, the heating coil is covered with the upper surface of the heating coil. A coil holder to be mounted on the coil base is provided, a cylindrical portion is formed at the central portion of the coil holder, a cylindrical frame that fits the cylindrical portion is formed at the central portion of the coil base, and a part of the cylindrical portion A hook is provided on the inner periphery of the cylindrical frame, and a protrusion that protrudes inwardly and engages with the hook is provided. When the coil holder is placed on the upper surface of the heating coil, the cylindrical portion is placed on the cylindrical frame of the coil base. by engaging the protrusion of the hook fitted to, one that pressing and holding the heating coil to the coil base by the coil holder That (claim 1). According to the first aspect of the present invention, the heating coil is pressed and held by the coil holder that is mechanically mounted on the coil base, whereby the heating coil can be quickly fixed with one touch.
[0007]
It is preferable that a plate support projecting upward is formed on the coil holder, and the plate support is brought into contact with the lower surface of the top plate. Thereby, the gap between the heating coil and the top plate can be accurately determined according to the height dimension of the plate support. At the same time, the top plate can be supported by the plate support to prevent the top plate from being bent by sinking. In that case, if a cushion material is inserted between the plate support of the coil holder and the top plate, the impact applied to the top plate is mitigated, and the damage to the top plate is further reliably prevented.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
1 to 3 show an embodiment of the present invention, FIG. 1 is a perspective view of a coil base that supports a heating coil and a coil holder that is mounted on the coil base, and FIG. 2 is a plan view of the coil base that is mounted with the coil holder. FIG. 3 and FIG. 3 are right side views of FIG. In FIG. 1, a coil base 1 made of a heat-resistant resin has an annular frame 1a that is slightly larger than the heating coil 2, a central cylindrical frame 1b, and extends radially from the cylindrical frame 1b, although not visible in FIG. It consists of several spokes, and the annular frame 1a is integrally formed so that mounting legs 1c and 1d that are parallel to each other protrude at the one place on the diameter and two places that sandwich the diameter on the opposite side. ing. The mounting legs 1c and 1d are respectively provided with mounting holes 1e through which mounting screws (not shown) are passed. A sensor support is integrally formed at the center of the cylindrical frame 1b via a cross-shaped spoke, and a temperature sensor 4 (FIG. 2) for detecting the temperature of the pan is attached to the sensor support. In FIG. It is omitted.
[0009]
The heating coil 2 supported on the coil base 1 is formed into a hollow disk shape after the litz wire is wound in a spiral shape, and the winding is heated and fused, and the coil base 1 is formed through the central hollow portion. The lead wires 2 a and 2 b at the start and end of winding are fitted around the cylindrical frame 1 b and are wound around a lead wire holder 5 fitted into the coil base 1. The upper surface of the heating coil 1 and the upper end surface of the cylindrical frame 1b are on the same plane.
[0010]
The coil holder 6 is made of a heat-resistant resin (for example, PPS) and has a Y shape having one holding leg 6a and two holding legs 6b that overlap the mounting legs 1c and 1d of the coil base 1, respectively. A cylindrical portion 6c that fits inside the cylindrical frame 1b. The holding legs 6a and 6b have groove-shaped cross sections with reinforcing ribs raised on both the left and right sides, and mounting holes 6d that overlap the mounting holes 1e of the coil base 1 are formed at the tips. Here, the cylindrical portion 6c is provided with notches 7 at two opposite positions on the diameter, and the hook 6e extending in the circumferential direction is integrally formed so as to protrude downward facing the notch 7.
[0011]
Correspondingly, columnar protrusions 1 f are integrally formed on the cylindrical frame 1 b of the coil base 1 so as to protrude inward at two opposing positions on the diameter. Further, a tongue piece 6f is integrally formed at the tip of each holding leg 6a, 6b of the coil holder 6 so as to hang down from one side surface, and is further clockwise in a clockwise direction so as to be orthogonal to the tongue piece 6f. The facing engagement piece 6g is integrally formed. Furthermore, a plate support 6h is integrally formed on the reinforcing rib on one side of the coil holder holding legs 6a and 6b so as to protrude upward at a position equidistant from the center.
[0012]
In order to mount the coil holder 6 on the coil base 1, the coil holder 6 is put in the direction of the chain line arrow in FIG. 1. At this time, as shown by a two-dot chain line in FIG. The cylindrical portion 6c is inserted into the cylindrical frame 1b of the coil base 1 while being swung in the direction, and the cylindrical portion 6c is fitted into the cylindrical body 1b while the protrusion 1f is inserted into the notch 7. When the lower surface of the coil holder 6 hits the upper end surface of the heating coil 1, the coil holder 6 is twisted clockwise as indicated by a curved arrow in FIG. Thereby, each tongue piece 6f contacts the side surface of each mounting leg 1c, 1d, each engaging piece 6g engages with the lower surface of each mounting leg 1c, 1d, and simultaneously the hook 6e engages with the lower surface of the projection 1f. Match. All of these engagements are made by press-fitting by a slight elastic deformation of each part of the coil holder 6, and the coil holder 6 presses the heating coil 1. In this state, as shown in FIG. 2, the mounting holes 1e and 6d coincide with each other, and the coil base 1 and the coil holder 6 are fastened together by mounting screws (not shown) passing through the mounting holes 1e and 6d. Fixed to the body. The holding of the heating coil 1 by the coil holder 6 described above is performed very quickly by a simple operation of covering the coil holder 6 from above and twisting it sideways, and no expensive adhesive is required.
[0013]
On the other hand, as shown in FIG. 3, the top plate 9 is positioned in the vertical direction so that the lower surface thereof is in contact with the plate support 6 h, and then fixed to the electromagnetic cooker body. As a result, the gap G between the heating coil 1 and the top plate 9 is accurately determined, and the top plate 9 is supported by the plate support 6h. Therefore, even if it receives the weight of the pan from the upper surface, it can sink and bend. In other words, the gap G is always kept constant, and breakage due to deformation of the top plate 9 is prevented. In that case, as shown in FIG. 3, by inserting a cushion material 10 made of, for example, an asbestos-based refractory material between the plate support 6h and the top plate 9, the buffering action is increased and the top plate 9 is prevented from being damaged. The action becomes even better.
[0014]
【The invention's effect】
As described above, according to the present invention, by attaching the coil holder to the coil base so as to cover the heating coil, it is possible to quickly and inexpensively hold the heating coil, and the plate support provided in the coil holder can be used as the top plate. By making it abut, the gap between the heating coil and the top plate can be accurately maintained, and deformation of the top plate can be suppressed to prevent breakage thereof.
[Brief description of the drawings]
FIG. 1 is a perspective view of a coil holder and a coil base according to an embodiment of the present invention.
2 is a plan view of a coil base equipped with the coil holder of FIG. 1. FIG.
FIG. 3 is a right side view of FIG. 2;
FIG. 4 is a rear view of a coil base showing a conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Coil base 2 Heating coil 6 Coil holder 6h Plate support 9 Top plate 10 Cushion material

Claims (3)

In an electromagnetic cooker in which a disc-shaped heating coil is supported by a coil base and a top plate on which a pan is placed is disposed above the heating coil.
A coil holder to be mounted on the coil base is provided so as to cover the upper surface of the heating coil, and a cylindrical portion is formed at the central portion of the coil holder, and a cylindrical frame that fits the cylindrical portion is formed at the central portion of the coil base. And a hook is provided on a part of the cylindrical portion, and a protrusion that protrudes inwardly on the inner periphery of the cylindrical frame and engages with the hook is provided, and the coil holder is covered with the upper surface of the heating coil. The electromagnetic coil, wherein the heating coil is pressed against the coil base by the coil holder by fitting a cylindrical portion into a cylindrical frame of the coil base and engaging the hook with the protrusion. Cooking device. The electromagnetic cooker according to claim 1, wherein a plate support protruding upward is formed on the coil holder, and the plate support is brought into contact with the lower surface of the top plate. The electromagnetic cooker according to claim 2, wherein a cushion material is inserted between the plate support of the coil holder and the top plate.

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