JP4830582B2 - Induction heating cooker - Google Patents

Description

  The present invention relates to the field of induction cooking devices for cooking a magnetic pot placed on a top plate by electromagnetic induction of a heating coil.

Conventionally, in this type of induction heating cooker, as shown in FIG. 5, the upper case 1 and the lower case 2 are combined vertically to form the outer shell of the product, and the top plate 3 is bonded to the case. . The heating coil 5 is held in the coil base 6 inside. A substrate 7 is placed below the coil base 6 (see, for example, Patent Document 1). In recent years, such a desktop induction heating cooker has been required to be thin and improve safety. In order to achieve a reduction in thickness, the distance between the case bottom 2 and the substrate 7 is reduced. However, since the case bottom is made of a flammable resin, nonflammable material such as mica is used between the substrate and the case bottom. The plate 10 is installed to prevent the flame from reaching the outer shell when ignited from the substrate.
JP 2005-78902 A

  However, in the above conventional configuration, the lower part of the substrate can be prevented from burning, but it is difficult to dispose the non-combustible material between the case side surface and the side surface of the substrate. There was a problem that it was difficult to cover the corner portion without a gap. In addition, there is a method to increase the flame retardancy of the product by constructing the whole under the case with a resin having high flame retardancy, but generally the high flame retardant resin is excellent in gloss because it contains a lot of flame retardant. As a result, there was a problem that the appearance quality was lowered.

  SUMMARY OF THE INVENTION The present invention solves the above-described conventional problems, and an object thereof is to provide an induction heating cooker that is improved in safety without impairing appearance quality by simple assembly.

In order to solve the above problems, the induction heating cooker of the present invention forms a protective plate with a highly flame-retardant resin, attaches the protective plate to the side of the substrate, and then attaches the entire substrate including the protective plate to the bottom of the case. In this case, the protection plate is fixed to the substrate and the bottom of the case . Thereby, the flame retardance in the side surface direction of the substrate can be improved by a simple assembly operation. In addition, since the shape of the protection plate can be freely designed, any part of the substrate can be covered. In addition, since the resin under the case is composed of internal parts without changing, the flame retardancy can be improved without deteriorating the appearance quality.

According to the first aspect of the induction heating cooker of the present invention, the flame retardance in the side surface direction of the substrate can be improved by a simple assembly operation. In addition, since the shape of the protection plate can be freely designed, any part of the substrate can be covered. In addition, since the resin under the case is composed of internal parts without changing, the flame retardancy can be improved without deteriorating the appearance quality. Further, even if the protective plate is not securely fixed to the substrate with screws or the like, the protective plate can be assembled so as to be fixed in the product assembled state.

According to the second aspect of the present invention, the flame retardance in the side surface direction of the substrate can be improved by a simple assembly operation. In addition, since the shape of the protection plate can be freely designed, any part of the substrate can be covered. In addition, since the resin under the case is composed of internal parts without changing, the flame retardancy can be improved without deteriorating the appearance quality. Moreover, even if a non-combustible plate is not fixed individually, it can be assembled so that the non-combustible plate is fixed in a product state.

  According to invention of Claim 3, the corner part which is hard to protect with a plate-shaped incombustible material can be covered so that there may be no gap by forming a protection plate in arbitrary shapes.

According to the fourth aspect of the present invention, the dangerous part such as the high voltage part and the large current part on the lower surface of the substrate is covered from the side by the support piece attached to the protective plate, so that the dangerous part is made incombustible by the support piece and the non-combustible plate. Can be surrounded by wood.

According to the fifth aspect of the present invention, the distance between the bottom of the case and the substrate can be secured by the support piece attached to the protective plate, and the support portion such as a boss from the bottom of the case, that is, the resin and the substrate having low flame retardancy are brought into contact with each other. You don't have to Further, since it is not necessary to provide a boss or the like under the case, the shape of the case underside or the incombustible plate can be simplified.

The first invention includes a case on and under a case constituting a device, a top plate bonded on the case, a heating coil built between the case and the case, and a coil base for holding the heating coil. And a substrate installed on the bottom surface of the case, and a non-combustible plate made of non-combustible material between the substrate and the bottom of the case. After the protective plate to be covered is mounted on the substrate, the entire substrate including the protective plate is assembled under the case, and at this time, the protective plate is fixed to the substrate and under the case . Thereby, the flame retardance in the side surface direction of the substrate can be improved by a simple assembly operation. In addition, since the shape of the protection plate can be freely designed, any part of the substrate can be covered. In addition, since the resin under the case is composed of internal parts without changing, the flame retardance of the product can be improved without deteriorating the appearance quality. Further, even if the protective plate is not securely fixed to the substrate with screws or the like, the protective plate can be assembled so as to be fixed in the product assembled state.

According to a second aspect of the present invention, there are provided a case base and bottom case constituting the outer shell of the device, a top plate bonded to the case, a heating coil built between the case and the bottom case, and a coil base for holding the heating coil. And a substrate installed on the bottom surface of the case, and a non-combustible plate made of non-combustible material between the substrate and the bottom of the case. After mounting the covering protective plate on the substrate, the entire substrate including the protective plate is assembled under the case, and at this time, the nonflammable plate is fixed by the protective plate. Thereby, even if it does not fix an incombustible board individually, it can assemble so that an incombustible board may be fixed in a product state.

  In a third aspect of the invention, in particular, in the first or second aspect of the invention, the corner portion of the substrate is covered with a part of the protective plate. As a result, it is possible to cover a corner portion that is difficult to protect with simple assembly so that there is no gap.

According to a fourth aspect of the invention, in particular, in any one of the first to third aspects of the invention, the support piece supporting the lower surface of the substrate included in the protective plate surrounds the side surface of the dangerous part such as the high voltage part or the large current part. It is a thing. Thereby, a dangerous part can be covered with a support piece and a noncombustible board, and safety | security increases more.

In a fifth aspect of the invention, in particular, in any one of the first to fourth aspects of the invention, the substrate is supported directly from under the case or via a non-combustible plate by a support piece that supports the lower surface of the substrate included in the protective plate. Is. Accordingly, since the distance between the substrate and the bottom surface can be secured by the support piece, it is not necessary to contact the support portion such as the boss from the bottom of the case, that is, the resin having low flame retardancy and the substrate. Moreover, since it is not necessary to provide a boss etc. under the case, the shape under the case can be simplified.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
In FIG. 1, a case upper 1 and a case lower 2 are combined vertically to form an outer shell of a product, and a top plate 3 made of heat-resistant tempered glass is bonded to the case 1. A heating coil 5 held by a coil base 6 is provided in the approximate center of the lower case 2, and a substrate 7 is placed under the heating coil 5.

  FIG. 2 is a top view of the case 1 with the heating coil 5 and the coil base 6 removed. A non-combustible plate 10 made of mica is placed between the substrate 7 and the lower case 2, and is molded between the side wall 14 of the lower case 2 and the corner portion 17 of the substrate 7 with a highly flame-retardant resin. A protection plate 11 is installed. Since the protection plate 11 is formed in a shape along the shape of the lower case 2, the corner portion 17 can be covered without a gap.

  FIG. 3 is a view of the state in which the protective plate 11 is attached to the substrate 7 as viewed from the lower surface. The protective plate 11 is temporarily fixed to the substrate 7 by the support piece 12 of FIG. 3 and the rib 13 of FIG. With the protective plate 11 mounted on the substrate 7, the protective plate 11 is easily installed between the side surface of the substrate 7 and the side wall 14 of the lower case 2 by installing the substrate 7 together with the protective plate 11 under the case 2. be able to. Further, by sandwiching the solder portion of the coil connection terminal 18 through which a large current flows by the plurality of support pieces 12, the side surface can be surrounded by the protection plate 11 and the bottom surface can be protected by the non-combustible plate 10. In the figure, the three side surfaces are surrounded by the protective plate 11, but four directions may be surrounded.

  FIG. 4 shows a cross section of the main part in a state where the entire substrate 7 including the protection plate 11 is mounted on the lower case 2. Since the substrate 7, the protection plate 11, and the incombustible plate 10 are all sandwiched between the bottom surface 15 and the claw 16 under the case, these can be securely fixed to the case bottom 2, so that the protection plate 11 is securely attached to the substrate 7. There is no need to fix, and there is no need to securely fix the incombustible plate 10 to the lower case 2. Further, the substrate 7 is supported by the support piece 12 of the protective plate 11 so that the distance from the lower case 2 is kept constant. As a result, it is not necessary to attach a boss or the like for supporting the substrate to the lower case 2 and contact between the resin under the lower case 2 and the substrate 7 can be avoided. Further, the shape of the case lower 2 can be simplified, and accordingly, the incombustible plate 10 does not need to be provided with notches or holes for avoiding the bosses of the case lower 2 and the shape can be simplified.

  In the figure, the number of protective plates 11 is one, but a plurality of protective plates 11 may be installed on one substrate 7.

  As described above, the induction heating cooker according to the present invention can improve the flame retardancy in the side surface direction of the substrate by a simple assembly operation, and therefore can be applied to uses such as a heating cooker having a substrate. .

Schematic of the induction heating cooker in Embodiment 1 of the present invention. The internal block diagram of the induction heating cooking appliance in Embodiment 1 of this invention The attachment figure of the protection board to the board | substrate of the induction heating cooking appliance in Embodiment 1 of this invention Sectional drawing of the principal part of the induction heating cooking appliance in Embodiment 1 of this invention Configuration diagram of a conventional induction heating cooker

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Case top 2 Case bottom 3 Top plate 4 Operation part 5 Heating coil 6 Coil base 7 Board | substrate 8 Fan 9 Coil holder 10 Incombustible board 11 Guard plate 12 Support piece 13 Rib 14 Case lower side wall 15 Case bottom bottom face 16 Tab 17 Board | substrate corner part 18 Coil connection terminal

Claims (5)

On the case and under the case constituting the outer shell of the device, a top plate adhered on the case, a heating coil built in between the case and under the case, a coil base for holding the heating coil, A substrate installed on the bottom surface of the case, and a non-combustible plate made of a non-combustible material installed between the substrate and the case below,
After mounting a protective plate covering all or part of the side surface of the substrate molded with a highly flame-retardant resin to the substrate, the entire substrate including the protective plate is assembled under the case , An induction heating cooker in which a protective plate is fixed to the substrate and under the case . On the case and under the case constituting the outer shell of the device, a top plate adhered on the case, a heating coil built in between the case and under the case, a coil base for holding the heating coil, A substrate installed on the bottom surface of the case, and a non-combustible plate made of a non-combustible material installed between the substrate and the case below,
After mounting a protective plate covering all or part of the side surface of the substrate molded with a highly flame-retardant resin to the substrate, the entire substrate including the protective plate is assembled under the case, Induction heating cooker with a non-combustible plate fixed by a protective plate. The induction heating cooker according to claim 1 or 2, wherein a part of the protective plate covers a corner portion of the substrate. The protection plate has a support piece for supporting the lower surface of the substrate, the support piece, according to any one of claims 1 to 3 having a structure surrounding the risk portion such as a high-voltage unit and the high current portion Induction heating cooker. The protection plate has a support piece for supporting the lower surface of the substrate, the substrate is any one of claims 1 to 4 has a structure which is supported directly or via a non-combustible plates on the lower case by the support piece The induction heating cooker described in 1.