KR0123268B1 - Penetration type capacitor and magnetron thereof - Google Patents

Abstract

This invention related to a penetration-type capacitor and a magnetron integrated with the capacitor. The penetration-type capacitor includes: a ceramic dielectric(64) having a top surface fixed to a fixing tap(61) and a bottom fixed to a dielectric fixing part(42A); a penetration conductor having one end penetrated to the ceramic dielectric(64), and a cylindrical lead tap(62); an insulation case(63) including the ceramic dielectric(64), and a bottom directly fixed to the filter case(42); insulation tube(66); insulation cylinder(68) having an upper part fixed into the filter case(42), and having the lead tap(62); and an insulation resin(11) having the insulation case(63) and the insulation cylinder(68) in order to fix the ceramic dielectric(64) and the penetration conductor(60).

Description

Through-Through Capacitors and Integrated Magnetrons

1 is an exploded perspective view of a through capacitor according to a conventional example.

2 is a front sectional view of a through-type capacitor according to a conventional example.

3 is a cross-sectional view of FIG.

4 is a perspective view of a magnetron in which the through capacitors shown in FIGS. 1 to 3 are coupled.

5 is a cross-sectional view of FIG.

6 is a front sectional view showing an embodiment of a through-type capacitor according to the present invention.

7 is an exploded perspective view of FIG.

8 is a front sectional view showing another embodiment of a capacitor according to the present invention.

9 is an exploded perspective view of FIG.

10 is a cross-sectional view of FIG.

11 is a cross-sectional view showing the internal configuration of the filter box of the magnetron according to the present invention.

12 is a graph showing the results of comparison experiments of fifth harmonic emission values for the device of the present invention and the conventional invention.

13 is a graph showing the results of comparison of noise power values for the device of the present invention and the conventional invention.

* Explanation of symbols for main parts of the drawings

11: insulation resin 40: magnetron

42: filter box 42A: dielectric fixing portion

60: through conductor 61: fixed tab (TAB)

61A: Lead tab fixing piece 61B: Horizontal surface

62: Lead Tab 63: Insulation Busing

64: ceramic dielectric (DIELECTRIC) 66: insulated tube (TUBE)

68: INNER BUSHING 22,70,90: Through type capacitor

The present invention relates to a through-type capacitor (capacitor) and a magnetron integrated therewith, and more particularly, to a capacitor, which is easy to manufacture, inexpensive, and has an improved dielectric strength, plating ability, and soldering ability, and is integrated with it for a long time. A capacitor is operable.

The through type capacitor 20 according to the related art has a grounding hole 10 as shown in FIGS. 1 and 2, and an elliptical ceramic dielectric 12 is fixed to an upper surface of the grounding hole 10. After coupling, the electrode connector 14 is mounted on the top surface of the ceramic dielectric body 12, and the through-hole 18 in which the fixing tab 18A and the lead tab 18B are integrated is the grounding tool 10 and the ceramic dielectric material ( 12) and an insulating box 15 and an insulating cylinder 16, which are thermoplastic resins enclosing such a structure, are inserted to penetrate through the electrode connector 14, and then a thermosetting insulating resin such as, for example, epoxy resin. 11) is charged and configured.

A separation electrode 13 is formed on an upper surface of the ceramic dielectric 12, and both electrodes are formed independently, and a common electrode 13A is integrally formed on the lower surface of the ceramic dielectric 12. An opening 10A is formed in the ground hole 10, and a flat surface 10B is formed to allow the ceramic dielectric to be located, and is fixedly coupled to the filter box of the magnetron by, for example, a fastening screw. The through-conductor 18 is inserted into and fixed to the electrode connector 14 while being sealed with an insulating tube 19 made of silicon rubber (SILICONE RUBBER) on the outer circumference thereof and then filled and fixed with the insulating resin 11. .

In the case of the capacitor according to the conventional example having such a structure, the electrode connector 14 must be formed simply as a means for fixing the through conductor 18, and a grounding hole 10 for grounding is separately required. Since the separation electrode 13 and the common electrode 13A have to be additionally formed, the manufacturing cost is added and the process is complicated, while the insulation strength is structurally lowered.

In addition, since the through-conductor 18 normally forms the fixed tab 18A and the lead tab 18B integrally, the lead tab 18B is formed by bending the lower end of the fixed tab 18A in the width direction. As shown in FIG. 3, the cross-sectional shape of the cross-section is circular with an angled curved portion, and the thermosetting insulating resin 11 is formed on the outer side thereof while being integrated with the insulating tube 19 surrounding the outer side thereof. Is charged.

In this state, the stress of the insulating resin 11 generated during the curing process of the insulating resin is unevenly distributed, and the insulating resin 11 is detached from the ceramic dielectric 12 in the heating and cooling circulation process in actual use, so that the dielectric strength is seriously increased. Can be degraded. Moreover, the through conductor 18 should be improved by soldering by plating with tin (Sn) or the like to prevent rust. During plating, the contact between the plating solution and the curved portion is interrupted, resulting in poor plating or after completion of plating. An acidic plating solution remained in the curved portion, and there was a problem in that corrosion was promoted.

On the other hand, the through-type capacitor 20 according to the conventional example is coupled to the magnetron 40 as shown in FIGS. 4 and 5, the typical magnetron 40 is the filter box 42 and the cathode It consists of a stamp 50 and a pair of inductors 52, which are connected in series between the terminals of the cathode stem 50 and the through conductor 18. In the drawings, reference numerals 43, 44, and 45 denote yokes, high frequency output terminals, and heat radiating fins, respectively. In practice, when the conventional magnetron is applied to a microwave oven or the like, a satisfactory result cannot be obtained due to the disadvantages of the conventional capacitor as described above, and in order to fix the capacitor to the magnetron, 10 C) is drilled and the so-called EYELET joining method is adopted in which the projection hole 42A is press-punctured at the corresponding position of the filter box 42, and then bent inwardly and pressed by the through hole 10C. The bar 42A formed at this time has a problem in that it affects the radiation of the unnecessary radiation.

SUMMARY OF THE INVENTION The present invention has been made to solve these problems, and has a simplified structure, easy fabrication, low manufacturing cost, and improved through-insulation, plating and soldering capability, and a magnetron incorporating such a through capacitor. The purpose is to provide.

In order to achieve the above object, according to a preferred embodiment of the present invention, the upper surface is fixed to the fixing tab and the lower surface is a ceramic dielectric fixed to the dielectric fixing portion formed on one side of the filter box of the magnetron; A through-conductor comprising a fixing tab fixed to an upper surface of the ceramic dielectric and having a lead tab fixing piece, and a cylindrical lead tab having one end inserted into and fixed to the fixing tab; An insulator in which the ceramic dielectric is contained therein and a bottom surface thereof is directly fixed to the filter box; An insulated tube enclosed in close contact with the outer periphery of the lead tab; An insulated cylinder having an upper surface fixed inside the filter box and including the lead tab therein, and a through-type capacitor including an insulator and an insulating resin charged inside the insulated cylinder to insert and fix the ceramic dielectric and the through conductor. Is provided.

In addition, according to the present invention there is provided a magnetron in which the above-described through capacitor is integrally coupled.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

In the through-type capacitor according to the present invention, as shown in FIGS. 6 to 9 and 11, the upper surface is fixed to the fixing tab 61, while the lower surface thereof is one side of the filter box 42 of the magnetron 40. The ceramic dielectric 64 is fixed to the dielectric fixing portion 42A formed therein. In addition, the capacitor is fixed to the upper surface of the ceramic dielectric 64, and the fixing tab 61 and the one end portion of which the lead tab fixing piece 61A is formed are inserted into the fixing tab 61 through the ceramic dielectric 64. In addition to having a through conductor made of a fixed cylindrical lead tab 62, the ceramic dielectric 64 is included therein, and an insulator 63 having a lower end surface thereof directly fixed to the filter box 42; It is comprised with the insulating part 66 enclosed in close contact with the outer periphery of the lead tab 62. As shown in FIG.

In addition, the capacitor has an upper end surface fixed to the inner side of the filter box 42 and an insulation cylinder 68 included in the lead tab 62 therein, the ceramic dielectric 64 and the through conductor 60. In order to insert and secure the insulating box 63 and the insulating resin (68) filled in the insulating cylinder 68 is provided.

According to the magnetron according to the present invention, there is also provided a filter box comprising a cathode stem 50 having a terminal; The upper surface is fixed to the fixing tab 61, and the lower surface thereof is a ceramic dielectric 64 fixed to the dielectric fixing portion 42A formed on one side of the filter box 42 of the magnetron 40, and the ceramic dielectric 64. A through tab consisting of a fixed tab 61 fixed to an upper surface and having a lead tab fixing piece 61A formed thereon, and a cylindrical lead tab 62 having one end penetrated through the ceramic dielectric 64 and inserted into the fixed tab 61. The conductor 60, the ceramic dielectric 64 is included therein, and the lower surface of the insulation box 63 directly fixed to the filter box 42, the insulation enclosed in close contact with the outer periphery of the lead tab 62 And an insulating cylinder 68 having an upper end surface fixed to the inside of the filter box 42 and including the lead tab 62 therein, and the ceramic dielectric 64 and the through conductor 60 inserted therein. The through type consisting of an insulating resin 11 filled in the insulating box 63 and the insulating cylinder 68 for fixing. Capacitors 70 and 90; It consists of a pair of inductors 52 connected in series between the terminals of the cathode stem 50 and the through conductor 60.

6 and 7 are views illustrating a part of a through-type capacitor and a magnetron in which the capacitor is integrally formed according to an embodiment of the present invention having the above-described structure. The insulator 63 and the insulating cylinder 68 are shown in FIG. Have the same cross section, each of which is fixedly coupled to the bottom or top of the filter box outside or inside. The ceramic dielectric 64 is formed in common or separately, and the upper and lower ends thereof are fixedly coupled to the fixed tab horizontal plane 61B and the filter box 42, respectively, and according to the present invention, a separate electrode is not required.

The lead tab fixing piece 61A protrudes on the fixed tab horizontal plane 61B so that the upper end of the lead tab 62 can be coupled with the fixing tab 61. In addition, the through-conductor 60 is composed of a fixed tab 61 and a lead tab 62, the fixed tab 61 is formed of a tin plate plate or the like, the lead tab 62 is made of a good conductor such as copper Is formed.

Meanwhile, the filter box 42 and the capacitor 70 are integrated by fixing the members by using the dielectric fixing part 42A of the filter box 42 instead of a separate grounding hole 10 that is commonly used. And remarkably advantageous in structure. In addition, as will be described later, the through-conductor 60 has a circular cross section, thereby eliminating plating defects and ease of corrosion, which are one of the disadvantages of the conventional capacitor, thereby improving insulation strength during use.

Meanwhile, FIGS. 8 and 9 show another embodiment of the present invention, in which the capacitor 90 is directly formed in the filter box 42 by the same method as the above embodiment, but the fixing tab 81 is easily manufactured. By forming the lead tab fixing piece 81A so as to be bendable on the extending surface of the lower end of the fixing tab 81, the fixing tab 81 can be linearly simplified. In addition, the through conductor 81 is to improve the dielectric strength and plating ability as described in the above embodiment.

In addition, according to the present invention, the conventional electrode connector 14 is not required separately regardless of the embodiment, and as shown in FIG. 10, the stress generated in the curing process of the insulating resin 11 is uniformly distributed. As the dielectric strength is improved, the plating ability is improved and satisfactory soldering is possible.

The capacitor according to the present invention as described above is installed in the magnetron 40 as shown in FIG. 11, the configuration is the same as the conventional magnetron 40 shown in FIG. 4 and FIG. The capacitor has been replaced with a capacitor according to the invention.

On the other hand, Figures 12 and 13 is a view showing the results of comparing the performance improvement of the magnetron using the conventional through-type capacitor and the capacitor according to the present invention, the magnetron according to the present invention for the radiation of the unnecessary radiation It can be seen that the shielding characteristics are excellent.

Therefore, according to the capacitor of the present invention and the magnetron in which the capacitor is integrated, the structure of the capacitor is simplified, the capacitor is integrated with the magnetron, and the cost is low. It is possible to improve the plating ability and soldering ability, and the magnetron has all of these advantages, which improves the dielectric strength, enables stable operation for a long time, and has a shielding effect against the radiation of unnecessary radiation.

Claims (8)

In the through-type capacitor, the upper surface is fixed to the fixing tab 61 and the lower surface is a ceramic dielectric 64 fixed to the dielectric fixing portion 42A formed on one side of the filter box 42 of the magnetron 40; A fixed tab 61 having a lead tab fixing piece 61A formed thereon while being fixed to an upper surface of the ceramic dielectric 64 and a cylindrical lead tab having one end inserted into and fixed to the fixing tab 61 through the ceramic dielectric 64. A through conductor consisting of 62; An insulator (63) containing the ceramic dielectric (64) therein and having a lower surface directly fixed to the filter box (42); An insulated tube 66 tightly wrapped around the outer periphery of the lead tab 62; An insulating cylinder 68 having an upper surface fixed to the inside of the filter box 42 and including the lead tab 62 therein; And an insulating resin (11) filled in the insulating box (63) and the insulating cylinder (68) to insert and fix the ceramic dielectric (64) and the through conductor (60). Capacitors. The through-type capacitor according to claim 1, wherein the lead tab fixing piece (61A) is formed on a horizontal surface (61B) of the lower bend of the fixing tab (61). The through-type capacitor according to claim 1, wherein the ceramic dielectric material (64) is formed separately. 3. The through-type capacitor according to claim 2, wherein the lead tab fixing piece (61A) is formed by bending to allow caulking treatment. A filter box 42 comprising a cathode stem 50 having a terminal; A through capacitor integrated in the filter box 42; In the magnetron consisting of a pair of inductors 52 connected in series between the terminal of the cathode stem 50 and the through-conductor 60, the through-type capacitor is fixed to the fixed tab 61, the upper surface is fixed The fixing tab having the lead tab fixing piece 61A formed thereon while being fixed to the ceramic dielectric material 64 fixed to the dielectric fixing part 42A formed on one side of the filter box 42 of the magnetron 40. A through conductor 60 formed of a cylindrical lead tab 62 inserted into and fixed to the fixing tab 61 by penetrating the ceramic dielectric 64 and one end thereof, and including the ceramic dielectric 64 therein; The bottom surface is insulated box 63 directly fixed to the filter box 42, the insulated tube 66 tightly wrapped around the outer periphery of the lead tab 62, the top surface is fixed to the inside of the filter box 42 An insulating cylinder 68 including the lead tab 62 therein, and the ceramic dielectric 64 In order to secure the conductor 60 sapseol magnetron, characterized in that consisting of the insulating resin 11 filled in the interior of the insulation box 63 and the insulating cylinder (68). The magnetron according to claim 5, wherein the lead tab fixing piece (61A) is formed on a horizontal surface (61B) of the lower bend of the fixing tab (61). The magnetron of claim 5, wherein the ceramic dielectric material is separated. 7. The magnetron according to claim 6, wherein the lead tab fixing piece (61A) is formed by bending to allow the caulking treatment.