KR950006112Y1 - Magnetron - Google Patents

Abstract

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Description

Miniature Magnetron

1 is a longitudinal cross-sectional view of a conventional magnetron.

2a or 1 is a reference view of the magnet structure of the magnetic circuit in plan view. (b) is a side view of (a).

Figure 3 is a reference view of the embodiment cut in the longitudinal magnetron of the reduced magnetron according to the present invention.

* Explanation of symbols for main parts of the drawings

1: Integral magnet 1 a: Through hole

1b: stepped portion 2: single ceramic body

2a: protrusion 2b: metal coating portion

2c: right angle groove

The present invention relates to a magnetron used in a microwave oven, in particular, the upper and lower poles of the magnetic circuit side constituting the magnetron are integrally formed with the upper and lower magnets, and the sleeve member of the cathode part is composed of a single ceramic body, The magnet and cathode structure of the present invention can be miniaturized to reduce the overall size of the miniature magnetron.

Typical conventional forms of magnetrons used in microwave ovens and the like are illustrated in FIG.

In this case, the magnetic circuit of the magnetron is composed of ring magnets 21A and 21B, yoke 23, and upper and lower poles 22A and 22B, and the cathode portion is the input terminal 24, the center lead 25, and the cathode portion upper end shield. 26A, the filament 27, the lower end shield 26B, the side lead 28, the ceramic spacer 29, the sleeve member 30, and the like, and the upper and lower magnets 21A and 21B It is ring-shaped like 2nd degree | time.

However, in the prior art, the upper and lower magnets 21A and 21B of the magnetic circuit have a separate configuration from the upper and lower poles 22A and 22B, so that there is a limit in reducing the size of the portion together with the yoke 23 and the like. The negative electrode portion also has a problem in reducing the size of the negative electrode portion, since the ceramic spacer 29, the sleeve member 30, and the like exist as structural essential elements of the center lead 25 and the side lead 28.

An object of the present invention is to solve the problems of the prior art as described above, to provide a miniature magnetron that can minimize the overall criterion of the magnetron by configuring the magnetic circuit and the cathode portion in a form that can be reduced.

In order to minimize the magnetron, the present invention has a monolithic structure in which the upper and lower magnets on the magnetic circuit side and the upper and lower poles can be used as they are, and the ceramic spacer or the sleeve member of the negative electrode part is composed of a single ceramic body.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

3 shows a reduced magnetron according to the present invention.

In this case, the magnet circuit side magnet of the magnetron and the upper and lower magnets are made of an integrated magnet 1, and the integrated magnet 1 has a through hole 1a through which the bent part of the antenna 32 connected from the vane 31 can pass. It is composed of the stepped portion 1b instead of the upper and lower pole function, of course, in order to have the required magnetic force, the capacity can be determined as the height adjustment of the magnet.

In the cathode portion of the magnetron, the upper end shield 26A, the filament 27, the side lead 28, the center lead 25, the terminal 24, and the like are provided in the same manner as before, but the lower end shield 26B, The ceramic spacer 29, the sleeve member 30, and the like are constituted by the integrated ceramic single body 2.

Here, the ceramic single body (2) is formed integrally with the lower shield (26B) connecting the filament 27 and the side lead 28 to form a closed circuit of the cathode portion and the concentric of the filament (27) It has a projection (2a) for maintaining the support state in the inner diameter side, the metal film (metallizing: 26) is formed on the upper surface of the projection (2a) is formed by silver brazing (Silver brazing) and the side lead (28) are interconnected.

In addition, in the lower end of the ceramic single body 2 that the center lead 25 exits to the input terminal 24 side, a right angle groove considering the inclination angle of the lower end of the center lead 25 to prevent the flow of the center lead 25. (2c) is formed.

The operation and effects of the present invention of such a configuration are as follows.

The reduced magnetron according to the present invention shown in FIG. 3 has a terminal 24, a center lead 25, an upper end shield 26a, a filament 27, and a ceramic coating body 2b on the side of the ceramic single body 2. When a constant power is supplied to a series of cathode circuits leading to (28), the filament 27 emits hot electrons at the same time as high temperature heat dissipation, and the hot electrons are formed at the ends of the integrated magnet (1) -yoke (23) -magnet (1). In the working space surrounded by the vane 31 by the magnetic circuit composed of the jaw portion 1b, it performs a trocoid movement and delivers the ultra-high frequency energy while transferring to the vane 31, thereby performing the same function as a normal magnetron.

Meanwhile, the miniature magnetron of the present invention has the same function as the existing magnetron, but the magnet and the upper and lower poles are composed of one integrated magnet (1), which significantly reduces the height of the upper and lower sealants 34 and 34 '. The height of the anode 33 and the yoke 23 can be significantly reduced by replacing the function at the stepped portion 1b of the integrated magnet 1.

In addition, since the lower end shield 26b, the ceramic spacer 29, and the sleeve member 30, etc., are all removed by the ceramic single body 2 at the cathode portion, the number of parts and the size of the entire body can be easily reduced. Can be realized.

This invention is designed to reduce the structure of the components and the cathode of the magnetic circuit in the magnetron, such as microwave oven to be reduced in size, it is possible to reduce the thin and thin of the magnetron, there is an advantageous feature that can achieve a good cost reduction according to the manufacturing. .

Claims (2)

A through-hole 1a through which the bent portion of the antenna 32 passes through one side of the inner surface, and an integral magnet 1 having a stepped portion 1b having upper and lower magnetic pole functions formed at an inner lower end thereof; Miniature magnetron, characterized in that consisting of a one-piece ceramic single body (2) having the function of the lower shield (26B), the ceramic spacer (29) and the sleeve member (30). The ceramic single body (2) according to claim 1, wherein the ceramic unitary body (2) is formed at the upper end of the protrusion (2a) supporting the lower end of the filament (27) and the protrusion (2a) of the filament (27) and the side lead (28). Miniature magnetron, characterized in that consisting of a metal film portion (2b) for electrical connection by silver brazing, and a right angle groove (2c) for guiding the downward slope of the center lead (25).