KR0123822Y1 - Coupling device of magnetron yoke - Google Patents

Abstract

The present invention relates to a yoke coupling device of a magnetron used in microwave heating equipment such as a microwave oven, and is particularly provided with a cathode filament and a cathode body disposed coaxially around the cathode filament, and a pole piece and an outer circumference of the upper and lower portions thereof. And a yoke coupling device of a magnetron for coupling a yoke formed on a magnetic circuit covering a magnetron made of a heat sink and a yoke positioned on an upper surface thereof.

Description

Coupling device of magnetron yoke

1 is a cross-sectional view showing the configuration of a magnetron used in a microwave heating device.

Figure 2 (a) (b) is an exploded perspective view and a cross-sectional view showing the configuration of the present invention.

Figure 3 (a) (b) is an exploded perspective view showing another embodiment of the present invention.

* Explanation of symbols for main parts of the drawings

5: Yoke A 6: Yoke B

10: fixing groove 20: fixing piece

The present invention relates to a yoke coupling device of a magnetron used in microwave heating equipment, such as a microwave oven. In particular, a cathode filament and a cathode body disposed coaxially around the cathode filament, and pole poles and upper and lower portions disposed at upper and lower portions thereof are provided. And a yoke coupling device of a magnetron for coupling a yoke formed on a magnetic circuit covering a magnetron made of a heat sink and a yoke positioned on an upper surface thereof.

Looking at the conventional case, as shown in FIG. 1, the upper and lower permanent magnets (1) (1a), and the upper and lower cylindrical cylindrical cylinders (3) arranged coaxially around the cathode filament (2) is installed The upper and the defective pole pieces (4) (4a), the yoke A (5) made of a magnetic material wrapped around them, and the yoke B (6) located on the upper surface and bonded to the yoke A (5) is surrounded In order to connect the yoke A (5) and the yoke B (6) forming a so-called magnetic circuit, the yoke A, B (5) (6) is conventionally simply connected using a screw or the yoke A (5). A part of itself was molded and bonded to the yoke B 6, and then a bending process was used.

However, these coupling methods were generated between yoke A (5) and yoke B (6).

That is, the direction of the force applied to break a part of the yoke B (6) is perpendicular to the wall surface of the yoke B (6). Problems such as a drop in output occurred during operation.

Therefore, the present invention has been devised to solve the above-mentioned problems, and does not cause moxibustion when the yokes A and B are combined to form a magnetic circuit in a magnetron used for microwave heating and other purposes. The purpose of the present invention is to provide a yoke coupling device of a magnetron that minimizes magnetic loss to maximize the efficiency of the magnetron.

In order to realize the object of the present invention, the yoke that encloses the cathode, the anode cylinder, the anode vane, and the heat sink and the yoke that is mounted on the place where the magnetron is needed by the male screw formed on the upper surface are not generated. It is characterized in that it is configured to minimize the magnetic loss.

Hereinafter will be described in detail with reference to the accompanying drawings the technical configuration and preferred embodiments of the present invention.

In FIG. 1, a magnetron used in a microwave oven or the like has a cathode filament 2 and two cylinders 3 having a cylindrical shape arranged coaxially around the magnet filament 2, and magnetic pole pieces (upper and lower portions of the anode cylinder). 4) (4a) is provided, and the heat sink 7 is attached to the outer periphery.

A plurality of anode vanes 8 forming a cavity resonator are provided inside the anode cylinder, and the antenna 9 pulls out from the anode vanes 8 through the through-holes of the pole pieces 4 to the outside along the axis of the metal tube. It is.

The upper and lower portions of the anode cylinder have a cylindrical ferrite permanent magnet (1) (1a), the outer side of which is surrounded by a yoke A (5) made of a magnetic body and above the yoke A (5) There is a yoke B 6 which is coupled to form a magnetic circuit.

As described above, the magnetron is generally constructed, and the present invention provides the yoke A (5) and the yoke B (6) for the coupling of the yoke A, B (5) (6) as shown in FIG. The yoke B 6 has the same shape on both sides, but the yoke B 6 has a fixing groove 10 in the through state, and one side of the yoke A 5 is integrated with the fixing piece 20 in the remaining state. Configure.

The shape formed in the said yoke A, B (5) (6) shall be trapezoidal.

And, according to another embodiment of the present invention in Figure 3 (a) yoke B (6) formed on both sides of the cutting groove formed by cutting, and the yoke A (5) to be fitted into the fixing groove The fixing piece 40 is configured in the same position of.

In another embodiment of the present invention, as shown in Figure 3 (b) to have a rhombic shape on both sides of the yoke A, B (5) (6), the yoke B (6) to be fixed to the hole ( 50) and the fixed piece 60 is formed so that it may be bent left and right about the yoke A5.

In the coupling process of FIG. 2 according to such a configuration, first, the yoke B 6 is inserted into the yoke A 5, and the trapezoidal fixing groove 10 and the fixing piece 20 are positioned on the same line. Do it.

Thereafter, the fixing piece 20 of the yoke A 5 is bent inward as shown in FIG.

That is, the fixing piece 20 of the yoke A 5 which is bent into the fixing groove 10 of the yoke B 6 is supported and fixed at the same time.

In addition, looking at another embodiment in Figure 3 (a), the yoke B (6) is inserted into the yoke A (5), so that the fixing groove 30 and the fixing piece 40 on the same line do.

In this state, when the fixing pieces 40 provided on both sides of the yoke A 5 are folded inward, the yoke A 5 and the yoke B 6 are fixed.

In addition, referring to FIG. 3 (b), the yoke B 6 is positioned inside the yoke A 5 so that the rhombic fixing groove 50 and the pair of fixing pieces 60 lie on the same line. do.

Then, the yoke A, B (5) (6) is fixed by bending the fixing piece 60 of the yoke A (5) in the left and right directions, respectively.

The fixing of the yokes A and B according to the various forms described above is suppressed as much as possible to prevent the output from being lowered due to magnetic loss.

Accordingly, it is possible to obtain a magnetic field having a desired specification even with a small permanent magnet, which can greatly contribute to cost reduction.

Claims (3)

In the coupling device of the yoke A which wraps the negative electrode, the positive electrode cylinder, the positive electrode vane, and the heat sink, and the yoke B coupled on the upper surface of the yoke A, when the yokes A and B (5) (6) are combined, As a coupling means for preventing the occurrence of moxibustion, the trapezoidal fixing pieces 20 are provided on both sides of the yoke A 5, but the circumference of the yoke A 5 is removed except for one side. And a trapezoidal through hole corresponding to the fixing piece 20 is formed on both side surfaces of the yoke B 6, and the fixing piece 20 is bent in the fixing groove 10. Joining device of the magnetron yoke, characterized in that made to be coupled. The coupling device of the magnetron yoke according to claim 1, wherein the coupling means comprises a fixing groove (30) trapped in a trapezoid at both end portions of the yokes (A, B) and a fixing piece (40). According to claim 1, The coupling means, the yoke A, B on both sides of the fixing groove 60 having a rhombic shape, and a pair of fixing pieces 60 to be bent left and right around the center Coupling device of the magnetron yoke, characterized in that configured to have.