KR200246074Y1 - Grid holder haning a gauge inserting hole for use in a microwave generator of a microwave oven - Google Patents

Abstract

The present invention relates to a grid holder of a microwave oven tube for microwave oven, the grid holder is a plurality of flange pins 76 formed with a plurality of ceramic pin insertion holes 74 at equal intervals in the circumferential direction, and the center of the flange portion 76 It is composed of a cylindrical grid grid portion 72 is formed so as to protrude from the grid 32, 52 is seated and bonded to the top.

As a characteristic constitution of the present invention, a gauge insertion hole 120 is formed in the cylinder wall portion of the grid joint portion 72, and the gap gauge 200 is inserted into the gauge insertion hole 120, whereby the cathode 20 and the first material are formed. It is easy to measure the distance between the first grid 32 and between the second grid 52 and the anode 60.

According to the present invention, since the distance between the first grid and the cathode and the second grid and the anode is accurately measured, the change in the resonance frequency is prevented from occurring, thereby improving the efficiency of the ultra-high frequency oscillation tube.

Description

GRID HOLDER HANING A GAUGE INSERTING HOLE FOR USE IN A MICROWAVE GENERATOR OF A MICROWAVE OVEN}

The present invention relates to an ultra-high frequency oscillation tube for a microwave oven, and more particularly, to a grid holder of an ultra-high frequency oscillation tube for a microwave oven, in which a gauge insertion hole is formed to accurately measure a distance between a grid and a cathode.

The applicant's Korean Patent Application Nos. 97-36327 and 36328 disclose microwave microwave oscillating tubes for a simple structure, which can eliminate the risk of high voltage and achieve light weight. Referring to FIG. 1, the ultra-high frequency oscillation tube is schematically described with reference to FIG. When heated to about 600-1200 ℃ by the heat of the heater 10 emits hot electrons. At this time, a bias voltage is applied to the first grid 32 which is arranged at a predetermined interval on the cathode 20 and forms the input cavity 30 together with the cathode 20 to input electrons emitted from the cathode 20. The control is focused on the cavity 30. The output cavity 50 arranged above the input cavity 30 has the same shape as the first grid 32 of the input cavity 30 so as to face each other with a second grid 52 and a second grid provided at predetermined intervals. Comprising an anode (60) located in the upper portion of 52, an operating voltage applied to the heater 10 is applied to the second grid 52, a bias voltage is applied to the first grid 32, both The electrons focused on the input cavity 30 are accelerated by the potential difference of H and the surface current is induced in the second grid 52 while passing through the first grid 32 and the second grid 52, and the second grid 52. ) And amplified in a space between the anode and the anode 60 to form a microwave. Such microwaves are emitted through the antenna 80, in which the plurality of cooling fins 90 are press-fitted and stacked in the anode 60 to radiate heat.

The conventional microwave microwave tube for the microwave oven, each grid 32, 52 as shown in Figure 2, the grid holder 70 as shown in the flange portion 76 is inserted into the ceramic pin 40 is inserted into the hole ( A plurality of 74 are formed at equal intervals in the circumferential direction, and a cylindrical hollow grid joint portion 72 is formed to protrude from the center of the flange portion 76 and to be seated and joined to the grid 32 (52). The ceramic pins 40 serve to maintain a predetermined distance between the grids bonded to the grid holders 70. After brazing the grids 32 to the grid holders 70, they are bonded to each other. In the assembled state with the cathode 20, the distance between the first grid 32 and the cathode 20 and the second grid 52 and the anode 60 should be checked, which is an input / output cavity 30 (50). In forming the resonance frequency f in the following equations, This is because a change in resonance frequency occurs due to a change in distance between them after assembling as a part having a component of (capacitance).

Where L is inductance.

However, there has been a problem that it is extremely impossible to check the distance between the grid and the cathode and the grid and the anode as described above in the grid holder of the conventional microwave microwave tube.

Therefore, the present invention has been devised accordingly, and its purpose is to provide a grid holder of microwave microwave oscillation tubes for gauge insertion holes formed with a gap gauge to easily measure the distance between the grid and the cathode and the grid and the anode. To provide.

The present invention for achieving the above object is a cylindrical hollow formed so that the plurality of insertion holes for inserting the ceramic pins at equal intervals in the circumferential direction, and protruded from the center of the flange portion to be seated and joined to the grid on the top. In a grid holder of a microwave microwave oscillation tube for a microwave oven consisting of a grid junction, the gauge insertion means capable of measuring the distance between the cathode and the first grid and between the anode and the second grid in the cylinder wall portion of the grid junction of the grid holder. It is characterized in that the gauge insertion hole is formed to be inserted.

According to the grid holder of the present invention, since the distance between the first grid and the cathode and the second grid and the anode is accurately measured, a change in the resonance frequency is prevented from occurring, thereby improving the efficiency of the ultra-high frequency oscillator tube.

1 is a schematic diagram showing a conventional ultra-high frequency oscillation tube for a microwave oven,

FIG. 2 is a detailed view illustrating a coupling state between the grid and the grid holder of FIG. 1;

Figure 3 is a schematic diagram showing a state of measuring the distance between the cathode and the grid using the grid holder of the microwave oven for microwave oven according to the present invention.

<Description of the symbols for the main parts of the drawings>

10: heater 20: cathode

30: input cavity 32: first grid

40: ceramic pin 50: output cavity

52: second grid 60: anode

70 grid holder 72 grid seat

74: ceramic pin insertion hole 76: flange portion

80: antenna 90: cooling fin

120: gauge insertion hole 200: gap gauge

Hereinafter, with reference to the accompanying drawings will be described a grid holder of a microwave oven tube for microwave oven according to a preferred embodiment of the present invention. For convenience of description, the same reference numerals are given to the same components as in the prior art.

As shown in FIG. 2, the grid holder 70 of the microwave microwave oscillation tube for the microwave oven according to the present invention includes a flange portion 76 having a plurality of ceramic pin insertion holes 74 formed at equal intervals in the circumferential direction, and the plan It is provided with a cylindrical hollow grid joint portion 72 protruding from the center of the branch portion 76 so that the grids 32 and 52 are seated and joined thereon.

And as a characteristic configuration of the present invention, as shown in Figure 3, the cylinder wall portion of the grid joint portion 72, so that the gauge inserting means for measuring the distance between the cathode 20 and the first grid 32 is inserted Gauge insertion hole 120 is formed. At this time, the gauge insertion means inserted into the gauge insertion hole 120, it is preferable to use the gap gauge 200 to measure the minute distance, such as the cathode 20 and the first grid (32).

For example, after brazing the first grid 32 to the grid holder 70 of the present invention and then checking the distance between the first grid 32 and the cathode 20, the gap gauge 200 ) Is inserted into the insertion hole 120 of the grid holder 70 to check the distance between the first grid 32 and the cathode (20).

When the second grid 52 is installed in the grid holder 70 configured as described above, the distance between the second grid and the anode 60 may be measured as described above.

Therefore, according to the grid holder 70 according to the present invention, it is possible to accurately measure the distance between the first grid 32 and the cathode 20 and the second grid 52 and the anode 60.

As described above, the grid holder of the microwave microwave oscillation tube of the present invention is precisely measured the distance between the first grid and the cathode and the second grid and the anode, thereby preventing a change in the resonance frequency, thereby preventing the microwave oscillation tube. Has the effect of improving the efficiency.

Claims (2)

A plurality of flange portions 76 having a plurality of insertion holes 74 into which the ceramic pins 40 are inserted are formed at equal intervals in the circumferential direction. In the grid holder of a microwave microwave oscillation tube for microwave ovens composed of a cylindrical hollow grid joint portion 72 formed to be seated and joined, Gauge inserting means for measuring the distance between the cathode 20 and the first grid 32 and between the anode 60 and the second grid 52 is inserted into the cylinder wall of the grid joint 72 of the grid holder. Grid holder of the microwave oven for microwave oven formed with a gauge insertion hole, characterized in that the gauge insertion hole 120 is formed. The method of claim 1, wherein the gauge insertion means inserted into the gauge insertion hole 120 is a grid holder of the microwave oven tube for microwave oven formed with a gauge insertion hole, characterized in that the gap gauge (200).