JPH11159767A - High frequency heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce cost by mounting a main fuse on a noise filter board and soldering the main fuse directly to the board as an integral structure thereby decreasing the labor required for assembling work and the number of parts. SOLUTION: A main fuse 2 is soldered directly onto a noise filter board 1 performing power supply noise control of a high frequency food heater and a power cord connection part 4 is connected with the noise filter board 1 through a lead wire 3. Since a metal terminal for main fuse and the lead wire 3 are not required to be caulked nor a resin cover is required, the labor required for assembling work can be reduced. Further, a water resistant vibration-proof cushion rubber can be eliminated by disposing at the upper part of the back plate of the body of high frequency food heater. Since no countermeasure against temperature is required at the metal terminal part of the lead wire 3, a lead wire 3 having smaller cross-section can be employed and the cost can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-frequency heating device for heating food, and more particularly to a structure of a noise filter substrate.

[0002]

2. Description of the Related Art Conventionally, a high-frequency heating apparatus of this type is shown in FIG.
As shown in FIG. 1, a noise filter substrate 1 provided at the upper rear part of the main body of the high-frequency heating device and a main fuse 2 provided at the lower rear part of the main body are separately arranged, and a power cord for supplying power to the noise filter substrate 1 is provided. The connecting portion 4 is connected via the lead wire 3, the main fuse 2 is attached in the middle of the lead wire 3, and is arranged near the power cord connecting portion 4. For fixing and insulating the main fuse 2, the metal terminal 2-a is covered with a cover 2-b made of caulking or resin on the lead wire 3. Further, a cushion rubber 5 is attached near the upper portion of the lead wire 3 connected to the main fuse 2 passing through the vicinity of the back plate of the main body in order to prevent vibration and water resistance. In addition, the lead wire 3 has a large cross-sectional area in order to take measures against temperature by contact resistance between the metal terminal 2-a and the fuse base, and it is necessary to consider the position thereof. FIG. 5 is an external view of a conventional noise filter substrate.

[0003]

In the conventional high-frequency heating device, the main fuse had to be covered with a caulking or resin cover on the lead wire for fixing and insulation. In addition, cushion rubber had to be attached to the lead wire near its upper part for measures against vibration and water to pass near the back plate of the main body. Furthermore, the position of the main fuse must be considered in order to take measures against temperature due to the contact resistance between the metal terminal of the lead wire and the fuse base, and there are many issues related to the actual design in terms of both performance and cost. .

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention unifies a noise filter substrate by integrally providing a main fuse on a noise filter substrate. Directly soldered to

According to the above invention, it is not necessary to caulk the metal terminal for the main fuse to the lead wire, it is not necessary to use a resin cover, and the lead wire connecting the power cord to the noise filter. The diameter can be reduced, and while the function of the main fuse is satisfied, the number of assembly steps and the number of parts can be reduced, and the cost can be reduced.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention has a structure in which a main fuse is integrated with a noise filter substrate and is disposed above a rear portion of a high-frequency heating device main body. The main fuse is directly soldered to the noise filter substrate. It was done.

[0007] Then, the number of assembly steps and the number of parts can be reduced, and the cost can be reduced.

[0008]

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment) FIG. 2 is an external view of a substrate of a noise filter component of a high-frequency heating device according to an embodiment of the present invention. FIG. 1 is a perspective view of a noise filter substrate of a high-frequency heating device and a periphery of a main fuse portion. FIG. 3 shows a noise filter circuit diagram of the high-frequency heating device.

In FIG. 1, reference numeral 1 denotes a noise filter substrate for controlling power supply noise of a high-frequency heating device. 2 is a main fuse directly soldered on the noise filter substrate 1. Reference numeral 3 denotes a lead wire 3 connected from the power cord connection part 4 to the noise filter substrate 1, and reference numeral 4 denotes a power cord connection part 4.

[0011]

As described above, according to the present invention, it is not necessary to caulk the metal terminal for the main fuse to the lead wire, and it is not necessary to cover the metal terminal with the resin cover. In addition, by placing it on the top of the back plate of the main body of the high-frequency heating device, there is no need to attach cushion rubber for vibration and water resistance.
Workability is also improved. Further, for the lead wire, it is not necessary to take measures against the temperature of the metal terminal portion, a lead wire having a smaller cross section can be used, and the number of assembly steps and the number of parts can be reduced, leading to a cost reduction.

[Brief description of the drawings]

FIG. 1 is an external perspective view of the vicinity of a noise filter portion and a main fuse portion of a high-frequency heating device according to an embodiment of the present invention.

FIG. 2 is an external view of the noise filter substrate.

FIG. 3 is a circuit diagram of the noise filter.

FIG. 4 shows a noise filter section of a conventional high-frequency heating device;
And external view around the main fuse section

FIG. 5 is an external view of the noise filter substrate.

[Explanation of symbols]

 1 noise filter board 2 main fuse 3 lead wire 4 power cord connection

Claims (1)

[Claims] 1. A high-frequency heating device having a noise filter substrate unit having a noise filter substrate unit mounted integrally with a main fuse mounted on a noise filter substrate and soldered directly to the substrate.