JP3610896B2 - Induction heating cooker - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for connecting a heating coil and a drive circuit board of an induction heating cooker used in general households.
[0002]
[Prior art]
Conventionally, the heating coil and the drive circuit board of this type of induction heating cooker are usually connected to the terminal block provided on the drive circuit board by screwing, caulking, etc. Is.
[0003]
Hereinafter, the configuration will be described with reference to FIGS. As shown in FIG. 1, the frame 1 and the outer case 2 constituting the main body, the top plate 4 on which the cooked container 3 is placed, the heating coil 5 positioned below the top plate 4, and the heating coil 5 A coil base 6 to be mounted, a drive circuit board 7 for supplying a high-frequency current to the heating coil 5, a lead portion 8 of the heating coil connected to the drive circuit board 7, and the heating coil 5 and the drive circuit board 7 for cooling The cooling fan 9 is used.
[0004]
In the above configuration, the lead portion 8 of the heating coil is processed with a round terminal 10 or a faston terminal 11 as shown in the enlarged view of FIG. 2, and screwed to the terminal block 12 provided on the drive circuit board 7. Connected by caulking, etc.
[0005]
[Problems to be solved by the invention]
In such a conventional method of connecting the heating coil of the induction heating cooker and the drive circuit board, the heating coil, which is a heat generating component, and the drive circuit board are connected in the vicinity, so that the heat radiation efficiency is poor and the cooling is efficient. There was a problem that it was difficult to construct a route. Although there is no particular limitation, as shown in FIG. 3, the built-in induction heating cooker has a plurality of heating parts on the top and a roaster part and an operation part on the front, so the internal structure is complicated and dense. Since the efficiency is poor and the pressure loss of the cooling air is large, there is a problem that various noises are generated by increasing the capacity of the cooling fan. When providing a space between the heating coil and the drive circuit board to reduce the pressure loss, it is necessary to lengthen the lead part of the heating coil, but the malfunction of the drive circuit board due to the influence of the high frequency magnetic field generated by the heating coil, or Problems such as loss due to heat generation in the lead part and insulation treatment during wiring occur.
[0006]
[Means for Solving the Problems]
In order to solve the above-described problems, the present invention provides a case that constitutes a main body, a top plate on which a cooked cooking container is placed, a heating coil that heats the cooked cooking container, and a coil that places the heating coil. A base, a drive circuit board for passing a high-frequency current through the heating coil, and a cooling fan for cooling the heating coil and the drive circuit board, and a terminal of the lead portion of the heating coil and the drive circuit board A terminal for relay connection to the terminal of the lead wire is configured by caulking, welding, or the like, and a terminal configured at the terminal of the lead portion of the heating coil on the coil base and a terminal of the lead wire of the driving circuit board and configured terminal to configure the connection securing means for relay connection fixed to the connecting fixing means for locking the terminal, which is configured in the terminal of the lead portion of the heating coil to the coil base And it has a stop means, a terminal that is configured to the terminal of the locked said configured in the terminal of the lead portion of the heating coil was the driving circuit board leads to the terminals by screwing or Faston terminals by said locking means The connection is made.
[0007]
By providing the connection fixing means on the coil base as in the present invention, first, the lead portion of the heating coil can be processed as short as possible. Therefore, the malfunction of the drive circuit board due to the influence of the high-frequency magnetic field is prevented, and the lead portion generates heat. Loss is reduced and no insulation treatment is required when wiring the lead part. In this case, the influence of the high frequency magnetic field can be reduced by twisting the lead wire of the drive circuit board. Further, the position of the drive circuit board with respect to the heating coil can be freely designed, and an efficient heat dissipation configuration or an efficient cooling path can be easily configured. Further, noise can be easily reduced by reducing the pressure loss of the cooling air.
[0008]
In addition, in the case of the built-in induction heating cooker, the drive circuit board and the heating coil are disposed above the roaster portion so that the internal dimensions of the roaster portion are restricted, but according to the present invention, the drive Since the circuit board can be freely arranged, it is possible to provide a built-in induction heating cooker having a wide internal dimension and good usability.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
In order to solve the above-mentioned problem, the invention according to claim 1 includes a case constituting a main body, a top plate on which the cooked cooking container is placed, a heating coil for heating the cooked cooking container, and the heating coil. A coil base to be mounted; a drive circuit board for passing a high-frequency current through the heating coil; a cooling fan for cooling the heating coil and the drive circuit board; and a terminal of a lead portion of the heating coil; A terminal for relay connection to the terminal of the lead wire of the drive circuit board is configured by caulking, welding, or the like, and a terminal configured at the terminal of the lead portion of the heating coil on the coil base and the terminal of the drive circuit board configure the connection securing means for relay connection for fixing the terminal that is configured of the lead wire terminal, said connecting fixing means, the configured coil base terminal of the lead portion of the heating coil end And has a locking means for locking, said locking means by locked screw was configured terminal to the terminal of the drive circuit board leads to the terminal that is configured to the terminal of the lead portion of the heating coil It is configured to be connected by a stop or faston terminal. In this case, even if the connection fixing means configured on the coil base is configured integrally with the coil base or by a separate member, the same effect can be obtained.
[0010]
According to a second aspect of the present invention, a cut-and-raised portion is formed on the terminal, and a locking means for the cut-and-raised portion of the terminal is configured on the coil base.
[0011]
According to a third aspect of the present invention, the terminal is made of a material having a spring property, and the locking means is formed by climbing over the coil base using the spring property of the terminal.
[0012]
According to the second and third aspects of the invention, the efficiency of the assembling work is improved, and the heating coil is independent as a unit provided with the connection fixing means, so that the serviceability at the time of repair and replacement is improved.
[0013]
【Example】
(Example 1)
Embodiments of the present invention will be described below with reference to FIGS. FIG. 4 is a schematic view of an induction heating cooker showing an embodiment of the present invention, in which a frame 1 and an outer case 2 constituting a main body, a top plate 4 on which a cooking container 3 to be heated is placed, and a cooking container to be heated. A heating coil 5 for heating 3, a coil base 6 on which the heating coil 5 is mounted, a drive circuit board 7 for passing a high-frequency current through the heating coil 5, and a cooling fan for cooling the heating coil 5 and the drive circuit board 7 9, the terminal of the lead portion 8 of the heating coil and the terminal of the lead wire 13 of the drive circuit board are constituted by the round terminal 10 or the faston terminal 11, and the connection fixing for connecting the respective terminals on the coil base 6 by relay connection The means 14 is configured.
[0014]
The method of fixing the connection is not particularly limited, and can be arbitrarily selected by a designer such as screwing, caulking, or welding as long as the connection can be made electrically and mechanically.
[0015]
FIG. 5 is an enlarged view showing an example of the connection fixing means 14, and FIG. 5 (a) shows a screw base 15 fixed to the coil base 6 by insert molding or screwing, caulking, etc. The round terminal 10 is relay-connected by tightening.
[0016]
FIG. 5B shows a case where the tab terminal 17 is fixed to the coil base 6 by insert molding, screwing, caulking, or the like and relay-connected by the faston terminal 11.
[0017]
The effect | action is demonstrated about the induction heating cooking appliance comprised as mentioned above. By providing the connection fixing means 14 on the coil base 6, the lead portion 8 of the heating coil can be processed as short as possible. Therefore, the malfunction of the drive circuit board 7 due to the influence of the high frequency magnetic field is prevented, and the loss due to the heat generation of the lead portion is reduced. Insulation processing at the time of wiring of the lead portion becomes unnecessary. In this case, by twisting the lead wire 13 of the drive circuit board 7, it is possible to make it less susceptible to the influence of the high frequency magnetic field. In addition, as shown in FIG. 6, the position of the drive circuit board 7 can be freely designed with respect to the heating coil 5, and an efficient heat dissipation configuration or an efficient cooling path can be easily configured. Further, noise can be easily reduced by reducing the pressure loss of the cooling air.
[0018]
In addition, in the case of the built-in induction heating cooker, the drive circuit board and the heating coil are disposed above the roaster portion so that the internal dimensions of the roaster portion are restricted, but according to the present invention, the drive Since the circuit board can be freely arranged, it is possible to provide a built-in induction heating cooker having a wide internal dimension and good usability.
[0019]
(Example 2)
FIGS. 7 and 8 specifically show the connection fixing means 14. FIG. 7 shows the cut-and-raised portion 19 in the terminal 18 and the locking means 20 for the cut-and-raised portion 19 of the terminal 18 in the coil base 6. It is a thing. FIG. 8 shows a structure in which the terminal 18 is made of a material having a spring property, and a locking means 20 is formed by getting over the coil base 6 using the spring property of the terminal 18.
[0020]
The effect | action is demonstrated about the induction heating cooking appliance comprised as mentioned above. FIG. 7 (a) shows the terminal 18 of the heating coil, which is crimped and provided with a projecting hole in the terminal 18 formed by welding or the like and is threaded. 20 and the cut-and-raised portion 19 of the terminal 18. Further, the round terminal 10 formed by caulking to the terminal of the lead wire 13 of the drive circuit board and welding or the like is screwed with a terminal screw 21 and relay-connected.
[0021]
7B, the terminal 18 is provided with a hole, the nut 16 is inserted into the coil base 6, and is locked by the locking means 20 provided on the coil base 6 and the cut and raised portion 19 of the terminal 18. Further, the round terminal 10 formed by caulking to the terminal of the lead wire 13 of the drive circuit board and welding or the like is screwed with a terminal screw 21 and relay-connected.
[0022]
In FIG. 7C, a terminal 18 is formed with a tab terminal 17, which is connected to a terminal of a lead wire 13 of a driving circuit board by a faston terminal 11 formed by welding or the like.
[0023]
In FIG. 8A, the terminal 18 is made of a material having a spring property, and a protruding hole is provided and threaded. The terminal 18 is configured by caulking, welding, or the like to the end of the lead portion 8 of the heating coil, and is locked by a climbing configuration using the locking means 20 provided on the coil base 6 and the spring property of the terminal 18. Further, the round terminal 10 formed by caulking to the terminal of the lead wire 13 of the drive circuit board and welding or the like is screwed with a terminal screw 21 and relay-connected.
[0024]
8B, a hole is formed in the terminal 18, a nut 16 is inserted into the coil base 6, and the terminal is locked by a climbing configuration using the locking means 20 provided in the coil base 6 and the spring property of the terminal 18. . Further, the round terminal 10 formed by caulking to the terminal of the lead wire 13 of the drive circuit board and welding or the like is screwed with a terminal screw 21 and relay-connected.
[0025]
In FIG. 8C, a tab terminal 17 is formed on the terminal 18, and is connected to the terminal of the lead wire 13 of the drive circuit board by relay connection with a faston terminal 11 formed by welding or the like.
[0026]
As described above, according to the present embodiment, the locking means 20 is provided on the coil base 6 to improve the efficiency of the assembly work, and the heating coil 5 is repaired because it is independent as a unit provided with the connection fixing means 14. Serviceability at the time of replacement is improved.
[0027]
【The invention's effect】
As is clear from the above embodiments, according to the present invention, it is not necessary to prevent malfunction of the drive circuit board due to the influence of the high frequency magnetic field, to reduce loss due to heat generation of the lead portion, and to perform insulation processing during wiring of the lead portion. In this case, the influence of the high frequency magnetic field can be reduced by twisting the lead wire of the drive circuit board. Further, the position of the drive circuit board can be freely designed with respect to the heating coil, and an efficient heat radiation configuration or an efficient cooling path can be easily configured. Further, noise can be easily reduced by reducing the pressure loss of the cooling air.
[0028]
In addition, in the case of the built-in induction heating cooker, the drive circuit board and the heating coil are disposed above the roaster portion so that the internal dimensions of the roaster portion are restricted, but according to the present invention, the drive Since the circuit board can be freely arranged, it is possible to provide a built-in induction heating cooker having a wide internal dimension and good usability.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an induction heating cooker of a conventional example of the present invention. FIG. 2 (a) is an enlarged view of a main part showing an induction heating cooker of a conventional example of the present invention. Fig. 3 is a perspective view showing an induction heating cooker of a conventional example of the present invention. Fig. 4 is a perspective view showing an induction heating cooker of Example 1 of the present invention. (A) Enlarged view of the main part showing the induction heating cooker of Example 1 of the present invention (b) Enlarged view of the main part showing an induction heating cooker of another form of Example 1 (FIG. 6) Sectional drawing which shows the induction heating cooking appliance of Example 1 of invention [FIG. 7] (a) The principal part enlarged view which shows the connection fixing means of the induction heating cooking appliance of this invention (b) Other form of the connection fixing means Fig. 8 (c) is an enlarged view of the main part showing still another embodiment of the connection fixing means. Fig. 8 (a) is an enlarged main part showing the connection fixing means of the induction heating cooker of the present invention. Figure (b) the further EXPLANATION OF REFERENCE NUMERALS enlarged view showing another form of the other main part enlarged view showing a configuration (c) the connection fixing means connecting the fixing means
DESCRIPTION OF SYMBOLS 1 Frame 2 Outer case 3 Cooked cooking container 4 Top plate 5 Heating coil 6 Coil base 7 Drive circuit board 8 Lead part 9 of a heating coil Cooling fan 10 Round terminal 11 Faston terminal 12 Terminal block 13 Lead wire 14 of a drive circuit board Connection fixing means 15 Screw terminal 16 Nut 17 Tab terminal 18 Terminal 19 Cut-and-raised part 20 Locking means 21 Terminal screw

Claims (3)

A case constituting the main body, a top plate on which the cooking container to be heated is placed, a heating coil for heating the cooking container to be heated, a coil base on which the heating coil is placed, and a high-frequency current flowing through the heating coil A drive circuit board; a cooling fan for cooling the heating coil and the drive circuit board; and a terminal for relay connection to a terminal of the lead portion of the heating coil and a terminal of the lead wire of the drive circuit board However, it is constituted by caulking, welding, etc., and the terminal formed at the end of the lead portion of the heating coil and the terminal formed at the end of the lead wire of the drive circuit board are connected to and fixed on the coil base. connection securing means constitute of the connecting and fixing means, which has a locking means for locking the configured terminal to the terminal of the lead portion of the heating coil to the coil base, said locking And characterized in that a configuration in which a terminal that is configured to the terminal of the locked said configured in the terminal of the lead portion of the heating coil was the driving circuit board leads to the terminals by the step connected by screws or Faston Induction heating cooker. 2. The induction heating cooker according to claim 1, wherein a locking means for locking the cut and raised portion formed on the terminal of the lead portion of the heating coil is formed on the coil base. The terminal of the lead portion of the heating coil is made of a material having a spring property, and the locking means for locking the terminal by overcoming using the spring property of the terminal is formed on the coil base. Item 2. An induction heating cooker according to item 1.

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