KR20090009601A - Magnetron - Google Patents

Abstract

Magnetron is provided to reduce the length of the filter device along the axial direction of cathode by installing the upper insulation part at the upper part of the choke coil. An anode(131) forms the cavity resonator while being arranged inside a yoke(111). A cathode(151) emits the thermoelectron reaching to the anode. A main body(110) comprises an insulator(127) protruded from the bottom of yoke and produces and outputs the high frequency energy. A choke coil(165) is nearly arranged to the yoke more than the bottom surface of insulator. A filter box(161) is arranged at the bottom side of yoke in order to contain the insulator and choke coil inside. A upper insulation part(171) is arranged so that the insulating distance of the choke coil and the bottom side of yoke is extended.

Description

Magnetron {MAGNETRON}

The present invention relates to a magnetron, and more particularly, to a magnetron capable of reducing the length along the axial direction of the cathode, thereby enabling a compact configuration.

As is well known, the magnetron is a kind of oscillator for outputting high frequency energy by including an anode portion and a cathode portion disposed at the center of the anode portion to emit hot electrons.

1 is a cross-sectional view of a conventional magnetron. As shown in this figure, the magnetron has an anode portion 10 forming a cavity resonator, a cathode portion 20 disposed inside the anode portion 10, and an outer portion of the anode portion 10. It is provided with the yoke 41 arrange | positioned and the filter apparatus 50 arrange | positioned at one side of the said yoke 41.

The anode portion 10 includes a cylindrical body 11 and vanes 13 disposed radially inside the body 11. An antenna 15 is connected to any one of the vanes 13 to output high frequency energy. The outer side of the anode portion 10 is provided with a cooling fin 17 to cool the anode portion 10.

The cathode portion 20 includes a coil-shaped filament 21, a center lead 23 and a side lead 25 connected to the filament 21.

The upper magnet 27 and the lower magnet 29 forming a magnetic field are disposed on both sides of the filament 21 along the axial direction, and the pole piece 31 is disposed between the upper magnet 27 and the lower magnet 29. ) Are arranged respectively. An upper shield 33 and a lower shield 35 are disposed inside the upper magnet 27 and the lower magnet 29, respectively.

The center lead 23 and the side lead 25 are disposed in the lower shield 35, and an insulator 37 is provided at the bottom of the lower shield 35 to block vacuum.

Meanwhile, the filter device 50 is connected to the center lead 23 and the side lead 25 through the filter box 51 disposed at the bottom of the yoke 41 and the insulator 37. Terminal 53, a choke coil 55, one end of which is connected to the terminal 53, and a through type condenser 57, one end of which is connected to the choke coil 55 and the other end of which is connected to a power source. Equipped.

However, in the conventional magnetron, since the high voltage is applied to the terminal 53 and the choke coil 55 during operation, an insulation distance according to the bottom surface of the yoke 41 or the filter box 51 and safety regulations is provided. Since there is a problem in that the length of the magnetron filter device 50 is reduced along the axial direction of the cathode part 20, there is a problem in that it is restricted.

In particular, the height (H1) of the filter device 50 is composed of about 43mm to 47mm and occupies about 40% or more of the total height of the magnetron, when applying this magnetron to a system using a magnetron, such as a microwave oven, Compared to the cooking chamber of the range, the size of the microwave oven is generally increased in the installation direction in which the magnetron is installed, for example, in the horizontal direction or the vertical direction, thereby increasing the material cost and weight, as well as increasing the size. There is a problem in that the space is occupied more and is disadvantageous in utilizing the space.

Therefore, an object of the present invention is to provide a magnetron capable of reducing the length along the axial direction of the cathode portion.

In addition, another object of the present invention is to provide a magnetron which can be inexpensively compact and can reduce installation space and weight.

The present invention provides a yoke, an anode portion disposed inside the yoke and forming a cavity resonator, a cathode portion emitting hot electrons reaching the anode portion, and a bottom portion of the yoke for achieving the above object. A body having an insulator protruding from the body; A choke coil having at least one area closer to the yoke than the bottom surface of the insulator, a filter box disposed below the yoke such that the insulator and the choke coil are accommodated therein, a bottom of the choke coil and the yoke or It provides a magnetron including a filter device having an upper insulating portion is arranged to extend the insulating distance of the upper surface of the filter box.

The upper insulating portion may include a first insulating member disposed to block a bottom surface of the yoke or an upper surface of the filter box, and a second insulating member disposed to block a boundary area between the first insulating member and the insulator. It is preferable to include.

Preferably, the first insulating member and the second insulating member overlap a predetermined section.

The second insulating member may effectively include a hollow portion in which the insulator is accommodated, and a flange portion bent and extended from the hollow portion.

The hollow part may include a bent portion bent toward the insulator side, and the insulator may be formed with a cutout portion corresponding to the bent portion.

The upper insulating portion may further include a third insulating member disposed to overlap the flange portion.

It is effective that the second insulating member has a circular or square cross-sectional shape.

The first insulating member is preferably formed of mica.

The second insulating member is effectively formed of ceramic.

The upper insulator may be formed such that one side is in contact with the outer surface of the insulator and the other side is in contact with the bottom surface of the yoke or the upper surface of the filter box.

The upper insulating portion is preferably formed of a flexible mica.

A receiving hole is formed in the upper insulating portion to accommodate the insulator, and the receiving hole is preferably formed with a slit to extend outward.

It is effective that the insulator is provided with a contact portion in contact with the upper insulation portion.

The upper insulating portion is preferably formed of a ceramic.

The upper insulation portion may include a hollow portion in which the insulator is received, and a flange portion bent outwardly from one end of the hollow portion.

The upper insulating portion may further include a bent portion extending from the other end of the hollow portion to the insulator side, and the insulator is preferably formed with a cut portion cut to correspond to the shape of the bent portion.

It is effective that a depression is formed at the bottom of the insulator so as to be recessed upward.

The filter box is formed to be open upward, and the upper insulating portion is preferably integrally formed to extend along the bottom of the yoke to the insulator.

It is effective to further include a lower insulating portion disposed in the filter box to extend the insulation distance between the choke coil and the filter box.

The lower insulating portion is preferably formed of mica.

As described above, according to the present invention, the magnetron which can reduce the length of the filter device along the axial direction of the negative electrode part by arranging the upper insulation part to extend the insulation distance on the upper side of the choke coil to the choke coil to the yoke side. Is provided.

According to the present invention, the first insulating member is disposed to block the bottom surface of the yoke or the top surface of the filter box, and the second insulating member is disposed between the choke coil and the boundary region of the first insulating member and the insulator. By increasing the insulation distance between the bottom surface of the yoke or the top surface of the filter box, the choke coil can be disposed close to the yoke, thereby reducing the length along the axial direction of the filter part, that is, the height of the filter device.

Further, according to the present invention, the first insulating member is formed of mica and the second insulating member is formed of ceramic, thereby reducing material cost and facilitating fabrication. At this time, by overlapping the first insulating member and the second insulating member for a predetermined section, the insulating distance can be effectively ensured, and the material requirement of the second insulating member can be reduced, thereby reducing the cost.

In addition, according to the present invention, by forming a bent portion bent toward the insulator side in the hollow portion of the second insulating member, and by forming a cutout portion corresponding to the bent portion in the insulator, the insulation distance can be further extended. Material cost of the insulator can be reduced.

In addition, according to the present invention, one side is in contact with the outer surface of the insulator and the other side is formed by the upper insulation to be in contact with the bottom surface of the yoke or the upper surface of the filter box by reducing the number of components to extend the insulation distance choke It is possible to arrange the coil close to the yoke, so that the length of the filter device along the axial direction of the cathode portion can be reduced. In this case, the upper insulation portion is formed of a flexible mica, thereby reducing the manufacturing cost and extending the insulation distance.

In addition, according to the present invention, the filter box is formed to be opened upwardly and coupled to the bottom of the yoke, and the upper insulation portion is formed to be integrally formed to extend outwardly on the upper end of the insulator to remove the upper surface of the filter box. Material requirements and weight can be reduced, and the number of parts and assembly labor can be reduced.

In addition, according to the present invention, by providing the upper insulating portion and the lower insulating portion, it is possible to bring the bottom surface of the filter box closer to the yoke side, the height of the filter device is about 15mm to 20mm in the conventional 43mm to 47mm Can be significantly reduced. Thereby, not only the size but also the weight and material cost can be reduced, and the installation space can be reduced and a compact structure is possible.

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

2 is a side cross-sectional view of a magnetron according to a first embodiment of the present invention, and FIG. 3 is a bottom cross-sectional view of the filter device of FIG. As shown in these figures, the magnetron includes a yoke 111, an anode portion 131 disposed inside the yoke 111 and forming a cavity resonator, and hot electrons reaching the anode portion 131. A main body (110) having a cathode portion (151) for emitting light and an insulator (127) projecting from the bottom of the yoke (111) to generate and output high frequency energy; The yoke 111 includes at least one region of the choke coil 165 disposed closer to the yoke 111 than the bottom surface of the insulator 127, and the insulator 127 and the choke coil 165 are accommodated therein. A filter box 161 disposed at a lower side of the filter box, and an upper insulating part 171 disposed to extend an insulating distance between a bottom of the choke coil 165 and the yoke 111 or an upper surface of the filter box 161. It is comprised including the filter apparatus 160 provided.

The cathode portion 151 includes a coil-shaped filament 153, a center lead 155, and a side lead 157 connected to the filament 153.

The anode portion 131 includes a cylindrical body 133 disposed outside the filament 153 and a plurality of vanes 135 disposed radially inside the body 133. The other end of the antenna feeder 139, one end of which is connected to the antenna 137, is connected to the vane 135 so as to output high frequency energy.

An upper magnet 113 and a lower magnet 115 are disposed in the inner upper and lower regions of the yoke 111, and a magnetic path is formed between the upper magnet 113 and the lower magnet 115. The upper pole piece 117 and the lower pole piece 119 to form are each arrange | positioned. The upper shield 121 and the lower shield 123 for sealing are respectively coupled to the inner side of the upper magnet 113 and the lower magnet 115. An insulator 127 is provided at the bottom of the lower shield 123. A plurality of cooling fins 125 are coupled to the outside of the anode portion 131 to cool the anode portion 131.

On the other hand, the filter unit 160 is provided at the bottom of the yoke 111. The filter device 160 may include a filter box 161 disposed at the bottom of the yoke 111 and a terminal connected to the center lead 155 and the side lead 157 through the insulator 127. 163, a choke coil 165 disposed on both sides of the insulator 127 and connected to the terminal 163, one of the choke coil 165 or the terminal 163, and the filter box. The upper insulation portion 171 is interposed therebetween so that the insulation distance between any one of the upper surface or the lower shield 123 of the (161) and the choke coil 165 or the terminal 163 The lower insulating part 175 is interposed therebetween to extend the insulating distance of the bottom surface of the filter box 161.

The filter box 161 is formed of a rectangular parallelepiped forming a receiving space therein with a metal member, and the upper surface is integrally coupled by welding or the like so as to be in close contact with the bottom of the yoke 111.

The insulator 127 is formed of a ceramic to have a circular cross-sectional shape, and is sealed to the bottom of the lower shield 123 so that the inside of the lower shield 123 can maintain a vacuum. The insulator 127 is coupled to the center lead 155 and the side lead 157 and a pair of terminals 163 connected to one end thereof, respectively. The other end of each terminal 163 extends to the lower side of the insulator 127 and is bent outward in a horizontal direction to be connected to each end of the choke coil 165. A depression 128 is formed at the bottom of the insulator 127 to be recessed upward. This is because the choke coil 165 and the terminal 163 may reduce the material requirements of the insulator 127 without reducing the insulating distance between the upper surface of the filter box 161 and / or the lower shield 123. To do this.

A pair of choke coils 165 are disposed outside the insulator 127. The choke coils 165 are disposed to face each other with the insulator 127 interposed therebetween, and bottom surfaces of the choke coils 165 are disposed above the bottom surface of the insulator 127, respectively. The other end of the choke coil 165 is coupled to the filter box 161 and connected to the leads of the through-type condenser 167 together with the choke coil 165 to form a filter unit.

Meanwhile, the upper insulation portion 171 includes a hollow portion 172 in which the insulator 127 is accommodated, and a flange portion 173 that is bent and extended outward from an upper end of the hollow portion 172. Doing. The upper insulating portion 171 is integrally formed of a ceramic material. Here, the flange portion 173 may have an insulation distance between the choke coil 165 or the terminal 163 and the upper surface of the filter box 161 or the lower shield 123 may satisfy the insulation distance in accordance with safety regulations. It can be formed round or square in size.

By such a configuration, when the terminal of the through-type capacitor 167 is connected to a power source and a high voltage is applied, the upper insulation portion 171 is formed of a ceramic material so that charge is bypassed so that the choke coil 165 And the choke coil 165 can be installed close to the yoke 111 by extending the insulation distance between the terminal 163 and the upper surface of the filter box 161 or the lower shield 123. It is possible to reduce the height (H2) of (161). In addition, the lower insulating portion 175 allows the bottom surface of the filter box 161 to be installed to approach the choke coil 165 and the terminal 163 side (H2) of the filter box 161. To reduce even more.

4 is a side cross-sectional view of a magnetron according to a second exemplary embodiment of the present invention, and FIG. 5 is a bottom view of the choke coil region of FIG. 4. Hereinafter, the same or equivalent components as those described above and illustrated in the drawings will be described with reference to the same reference numerals for convenience of description, detailed description thereof or overlapping description thereof will be omitted. As shown in these figures, the magnetron includes a yoke 111, an anode portion 131 disposed inside the yoke 111 and forming a cavity resonator, and hot electrons reaching the anode portion 131. A main body (110) having a cathode portion (151) for emitting light and an insulator (127) projecting from the bottom of the yoke (111) to generate and output high frequency energy; The yoke 111 includes at least one region of the choke coil 165 disposed closer to the yoke 111 than the bottom surface of the insulator 127, and the insulator 127 and the choke coil 165 are accommodated therein. Filter device 190 having an upwardly open filter box 191 disposed below the upper portion, and an upper insulation portion 197 disposed to extend the insulation distance of the bottom of the choke coil 165 and the yoke 111. ) Is configured to include.

The filter device 190 may include a filter box 191 coupled to a bottom of the yoke 111, an insulator 127 coupled to a lower shield 123 protruding from the center of the bottom of the yoke 111, and The choke coil 165 having at least one region located above both bottoms of the insulator 127 on both sides of the insulator 127, and one end thereof penetrates through the insulator 127 and has a center lead 155. And a terminal 163 connected to the side lead 157 and the other end connected to the choke coil 165, respectively, and a bottom of the choke coil 165 or the terminal 163 and the yoke 111, or An insulation distance between the upper insulation portion 197 disposed to extend the insulation distance between the lower shield 123 and the bottom surface of the filter box 191 and the choke coil 165 or the terminal 163 is extended. The lower insulating portion 175 is disposed inside the bottom surface of the filter box 191.

The filter box 191 is formed of a rectangular parallelepiped having an upper surface, and has a flange 193 formed at an upper end thereof to be bent outwardly and contact the bottom surface of the yoke 111. Here, the filter box 191 may be configured to be coupled to the yoke 111 by forming a rectangular parallelepiped that is open upward to accommodate the lower portion of the yoke 111.

In the upper region of the insulator 127, an upper insulator 197 extending outward from an upper end of the insulator 127 to extend an insulation distance between the choke coil 165 and the bottom surface of the yoke 111. Is integrally formed. The insulator 127 and the upper insulator 197 are integrally formed with each other using a ceramic material. The bottom portion of the insulator 127 has a recessed portion 128 recessed upward. Here, the upper insulating portion 197 is formed in a rectangular plate shape, but may be formed in a circular shape with a size that can satisfy the safety distance between the choke coil 165 and the bottom of the yoke 111. have.

In this configuration, the upper insulator 197 may be integrally formed with the insulator 127 to simultaneously reduce the height of the insulator 127 and the height of the filter box 191. In addition, since the upper portion of the filter box 191 is removed, its height is reduced by that amount. In addition, the lower insulation portion 175 may further reduce the height of the filter box 191 by allowing the bottom surface of the filter box 191 to be disposed close to the choke coil 165 and the terminal 163. Make sure

6 is a side cross-sectional view of a magnetron according to a third exemplary embodiment of the present invention, FIG. 7 is a bottom view of the choke coil region of FIG. 6, and FIG. 8 is a modification of the second insulating member of FIG. 6. As shown in these figures, the magnetron includes a yoke 111, an anode portion 131 disposed inside the yoke 111 and forming a cavity resonator, and hot electrons reaching the anode portion 131. A main body (110) having a cathode portion (151) for emitting light and an insulator (127) projecting from the bottom of the yoke (111) to generate and output high frequency energy; The yoke 111 includes at least one region of the choke coil 165 disposed closer to the yoke 111 than the bottom surface of the insulator 127, and the insulator 127 and the choke coil 165 are accommodated therein. A filter box 161 disposed at a lower side of the filter box, an upper insulation portion 231 disposed to extend an insulating distance between the choke coil 165 and an upper surface of the filter box 161, and the filter box 161. Filter device 220 having a lower insulating portion 175 disposed inside the bottom surface of the filter box 161 so that the insulating distance between the bottom surface and the choke coil 165 or the terminal 163 is extended. It is configured to include.

The filter device 220 may include a filter box 161 coupled to a bottom of the yoke 111 and at least one region on both sides of the insulator 127 above the bottom of the insulator 127. The choke coil 165 and one end of the terminal 163 connected to the center lead 155 and the side lead 157 through the insulator 127 and the other end of the choke coil 165 are respectively connected. And an upper insulating portion 231 disposed to extend an insulating distance between the choke coil 165 and an upper surface of the filter box 161, the bottom surface of the filter box 161, and the choke coil 165. Alternatively, the lower insulating part 175 is disposed inside the bottom surface of the filter box 161 to extend the insulating distance from the terminal 163.

On the other hand, the upper insulating portion 231, the first insulating member 233 is disposed to extend the insulating distance between the top surface of the choke coil 165 and the filter box 161, and the first insulating member 233 ) And a second insulating member 235 disposed to extend an insulating distance between the boundary of the insulator 127 and the choke coil 165.

The first insulating member 233 is formed in a plate shape of a mica material, and a receiving hole 234 is formed in the center thereof so that the insulator 127 can be accommodated.

The second insulating member 235 has a hollow portion 237 in which the insulator 127 is accommodated, and is bent outwardly from an upper end of the hollow portion 237 to extend the first insulating member 233. ) And a flange portion 238 disposed to overlap with each other. The flange portion 238 may be disposed to overlap the first insulating member 233 to reduce a radius (or width) extending outward in the horizontal direction from the insulator 127. The second insulating member 235 is integrally formed of a ceramic material. The hollow part 237 is formed in a cylindrical shape, and the flange part 238 is formed to have a disk shape. Here, as shown in FIG. 8, the second insulating member 235 may be configured to include a cylindrical hollow portion 247 and a flange portion 248 on a square plate.

The lower insulation portion 175 is disposed inside the bottom surface of the filter box 161 to extend the insulation distance between the choke coil 165 and the terminal 163 and the bottom surface of the filter box 161. . The lower insulating portion 175 is formed in a plate shape of mica.

In this configuration, when the terminal of the through-type capacitor 167 is connected to a power source and a high voltage is applied, the second insulating member 235 and the first insulating member 233 are connected to the choke coil 165 and the terminal ( 163 and the upper or lower shield 123 of the filter box 161 by extending the insulating distance to ensure safety. As a result, the choke coil 165 may be disposed close to the bottom of the yoke 111 to reduce the height of the filter box 161. In addition, the lower insulation portion 175 extends the insulation distance between the choke coil 165 and the terminal 163 and the bottom surface of the filter box 161 so that the bottom surface of the filter box 161 is the choke. It is possible to be arranged in close proximity to the coil 165 and the terminal 163. As a result, the height of the filter box 161 can be lowered.

9 is a side cross-sectional view of a magnetron according to a fourth embodiment of the present invention, and FIG. 10 is a bottom view of FIG. 9. As shown in these figures, the magnetron includes a yoke 111, an anode portion 131 disposed inside the yoke 111 and forming a cavity resonator, and hot electrons reaching the anode portion 131. A main body (110) having a cathode portion (151) for emitting light and an insulator (127) projecting from the bottom of the yoke (111) to generate and output high frequency energy; The yoke 111 includes at least one region of the choke coil 165 disposed closer to the yoke 111 than the bottom surface of the insulator 127, and the insulator 127 and the choke coil 165 are accommodated therein. A filter box 161 disposed at a lower side of the filter box, an upper insulation part 261 disposed to extend an insulating distance of a bottom of the choke coil 165 and the yoke 111 or an upper surface of the filter box 161. A lower insulating portion 175 disposed inside the bottom surface of the filter box 161 such that an insulating distance between the bottom surface of the filter box 161 and the choke coil 165 or the terminal 163 is extended. It is comprised including the filter apparatus 250 provided.

The bottom of the yoke 111 is provided with an insulator 127 formed of a ceramic material coupled to the bottom of the lower shield 123. One end is coupled to the insulator 127 such that a pair of terminals 163 connected to the center lead 155 and the side lead 157 pass through each other.

On the other hand, the bottom of the insulator 127 has a predetermined cut along the radial direction to reduce the required amount of material while the insulation distance between the terminal 163 and the upper surface of the filter box 161 is further extended ( 129 is formed.

The upper insulating portion 261 may block a gap between the first insulating member 263 and the first insulating member 263 and the insulator 127 disposed to block the upper surface of the filter box 161. And a second insulating member 265 disposed so as to be disposed.

The second insulating member 265 may include a hollow part 267 in which the insulator 127 is accommodated, a flange part 268 extending outward from an upper end of the hollow part 267, and the hollow part. A bent portion 269 bent inward from the lower end of 267 is provided. The bent portion 269 is formed to contact or face the cut portion 129.

By such a configuration, the upper insulation portion 261 and the lower insulation portion 175 have an insulating distance between the choke coil 165 and the terminal 163 and the peripheral conductors, that is, the filter box 161 and the lower shield 123. The choke coil 165 may be disposed to be close to the yoke 111 and the bottom of the filter box 161 may be disposed to be close to the choke coil 165 and the terminal 163. The height of 161 can be significantly reduced. In addition, the first insulating member 263 and the second insulating member 265 overlap each other for a predetermined period to reduce the material requirement of the second insulating member 265 by extending the insulating distance. In addition, the bent portion 269 of the second insulation member 265 may face the cutout portion 129 of the insulator 127 to extend the insulation distance, thereby reducing the material requirement of the insulator 127.

FIG. 11 is a side cross-sectional view of a magnetron according to a fifth embodiment of the present invention, and FIG. 12 is a bottom view of the choke coil region of FIG. As shown in these figures, the magnetron includes a yoke 111, an anode portion 131 disposed inside the yoke 111 and forming a cavity resonator, and hot electrons reaching the anode portion 131. A main body 110 having a cathode portion 151 for emitting light and an insulator 127 protruding from the bottom of the yoke 111 to generate and output high frequency energy; The yoke 111 includes at least one region of the choke coil 165 disposed closer to the yoke 111 than the bottom surface of the insulator 127, and the insulator 127 and the choke coil 165 are accommodated therein. A filter box 161 disposed at a lower side of the filter box, an upper insulation part 291 arranged to extend an insulating distance of a bottom of the choke coil 165 and the yoke 111 or an upper surface of the filter box 161. A lower insulating portion 175 disposed inside the bottom surface of the filter box 161 such that an insulating distance between the bottom surface of the filter box 161 and the choke coil 165 or the terminal 163 is extended. It is comprised including the filter apparatus 280 provided.

The insulator 127 formed of ceramic protrudes downward in the center of the bottom of the yoke 111, and the bottom portion of the insulator 127 is recessed upward so as to reduce the material requirement without reducing the insulation distance. ) Is formed.

A pair of choke coils 165 are disposed on both sides of the insulator 127, and the choke coil 165 or the terminal 163 and the choke coil 165 are disposed between the insulator 127 and the choke coil 165. The upper insulation portion 291 is formed to extend the insulation distance from the filter box 161 or the lower shield 123.

The upper insulating portion 291 may block a gap between the first insulating member 293 and the first insulating member 293 and the insulator 127 disposed along the upper surface of the filter box 161. The second insulating member 295 is disposed, and the third insulating member 301 is disposed to overlap the second insulating member 295 by a predetermined length.

The first insulating member 293 and the third insulating member 301 are formed in a rectangular plate shape with mica, and the second insulating member 295 is formed of ceramic. The second insulating member 295 includes a hollow portion 297 in which the insulator 127 is accommodated, and a flange portion 298 extending outward from an upper end of the hollow portion 297.

Here, the third insulating member 301 is disposed to overlap the flange portion 298 of the second insulating member 295 so that the insulating distance is extended, so that the flange portion 298 of the second insulating member 295 is extended. It is possible to further reduce the width (or radius) protruding to the outside to further reduce the material requirements of the second insulating member (295).

FIG. 13 is a side cross-sectional view of a magnetron according to a sixth embodiment of the present invention, and FIG. 14 is a bottom view of the choke coil region of FIG. As shown in these figures, the magnetron includes a yoke 111, an anode portion 131 disposed inside the yoke 111 and forming a cavity resonator, and hot electrons reaching the anode portion 131. A main body (110) having a cathode portion (151) for emitting light and an insulator (127) projecting from the bottom of the yoke (111) to generate and output high frequency energy; The yoke 111 includes at least one region of the choke coil 165 disposed closer to the yoke 111 than the bottom surface of the insulator 127, and the insulator 127 and the choke coil 165 are accommodated therein. A filter box 161 disposed at a lower side of the filter box, an upper insulation part 321 disposed to extend an insulating distance of a bottom of the choke coil 165 and the yoke 111 or an upper surface of the filter box 161. And a lower insulation portion 175 disposed inside the bottom surface of the filter box 161 such that an insulation distance between the bottom surface of the filter box 161 and the choke coil 165 or the terminal 163 is extended. One filter device 310 is configured.

An insulator 127 made of ceramic protrudes downward in the center of the bottom of the yoke 111, and a predetermined cut along the radial direction is cut in the lower region of the insulator 127 to reduce the material requirement while extending the insulation distance. The part 129 is formed.

On the other hand, a pair of choke coils 165 are provided on both sides of the insulator 127, and the choke coil 165 and the terminal 163 and the upper side between the choke coil 165 and the insulator 127. An upper insulating portion 321 is arranged to extend the insulating distance from the conductor.

The upper insulating portion 321 may extend the insulating distance between the first insulating member 323 disposed along the upper surface of the filter box 161 and the first insulating member 323 and the insulator 127. The second insulating member 325 is disposed, and the third insulating member 331 is disposed to overlap with the second insulating member 325.

The first insulating member 323 and the third insulating member 331 are each formed in a plate shape of a mica material, and the second insulating member 325 is formed of a ceramic material. The second insulating member 325 may include a hollow part 327 in which the insulator 127 is accommodated therein, a flange part 328 extending outwardly from an upper end of the hollow part 327, and the hollow part. A bent portion 329 bent and extended inward from the lower end of 327 is provided. The third insulating member 331 is disposed to overlap the flange portion 328. This extends the insulation distance between the top surface of the choke coil 165 and the filter box 161 or the lower shield 123 while reducing the width (or radius) of the flange portion 328 extending outward. 2 is to reduce the material requirement of the insulating member 325.

By such a configuration, the upper insulation portion 321 and the lower insulation portion 175 can significantly reduce the height of the filter box 161. In addition, the third insulating member 331 may reduce the material requirement of the second insulating member 325, and the bent portion 329 of the second insulating member 325 may be formed of the material of the insulator 127. To reduce the requirements.

15 is a side cross-sectional view of a magnetron according to a seventh embodiment of the present invention, FIG. 16 is a bottom view of the choke coil region of FIG. 15, and FIG. 17 is a plan view of the upper insulation of FIG. 15. As shown in these figures, the magnetron includes a yoke 111, an anode portion 131 disposed inside the yoke 111 and forming a cavity resonator, and hot electrons reaching the anode portion 131. A main body (110) having a cathode portion (151) for emitting light and an insulator (127) projecting from the bottom of the yoke (111) to generate and output high frequency energy; The yoke 111 includes at least one region of the choke coil 165 disposed closer to the yoke 111 than the bottom surface of the insulator 127, and the insulator 127 and the choke coil 165 are accommodated therein. A filter box 161 disposed at a lower side of the filter box, an upper insulation part 351 disposed to extend an insulating distance of a bottom of the choke coil 165 and the yoke 111 or an upper surface of the filter box 161. And a lower insulation portion 175 disposed inside the bottom surface of the filter box 161 such that an insulation distance between the bottom surface of the filter box 161 and the choke coil 165 or the terminal 163 is extended. One filter device 340 is configured.

The insulator 127 formed of ceramic protrudes downward in the center of the bottom of the yoke 111, and the bottom of the insulator 127 is recessed upwardly so as to reduce the material requirement without shortening the insulation distance ( 128 is formed.

On the other hand, a pair of choke coils 165 are provided on both sides of the insulator 127, and the choke coil 165 and the terminal 163 and the upper side between the choke coil 165 and the insulator 127. An upper insulating portion 351 is provided to extend the insulating distance from the conductor.

The upper insulating portion 351 is formed in a rectangular plate shape of a mica having flexibility. The upper insulation portion 351 is formed so that one region contacts the insulator 127 and another region contacts the upper surface of the filter box 161 using flexibility of a material.

As shown in FIGS. 16 and 17, the upper insulating portion 351 has a receiving hole 353 formed at the center thereof so as to be in contact with the outer surface of the insulator 127, and in the receiving hole 353. The slits 354 cut outward are formed to face each other. This is for guiding the upper insulation portion 351 to be easily bent in the direction in which the choke coils 165 disposed on both sides of the insulator 127 are installed, as shown in FIG. 15.

In this configuration, the upper insulation portion 351 and the lower insulation portion 175 extend the vertical distance between the choke coil 165 and the terminal 163 and the surrounding conductor in the filter box 161. To reduce the height. In addition, the upper insulation portion 351 is made of a relatively cheap mica material to reduce the manufacturing cost. The slit 354 allows the coupling of the upper insulation portion 351 to be quick and easy.

18 is a side sectional view of a magnetron according to an eighth embodiment of the present invention. As shown in this figure, the magnetron includes a yoke 111, an anode portion 131 disposed inside the yoke 111 and forming a cavity resonator, and hot electrons reaching the anode portion 131. A main body (110) having a cathode portion (151) for emitting light and an insulator (127) projecting from the bottom of the yoke (111) to generate and output high frequency energy; The yoke 111 includes at least one region of the choke coil 165 disposed closer to the yoke 111 than the bottom surface of the insulator 127, and the insulator 127 and the choke coil 165 are accommodated therein. A filter box 161 disposed at a lower side of the filter box, an upper insulation portion 381 disposed to extend an insulating distance between a bottom of the choke coil 165 and the yoke 111 or an upper surface of the filter box 161. And a lower insulation portion 175 disposed inside the bottom surface of the filter box 161 such that an insulation distance between the bottom surface of the filter box 161 and the choke coil 165 or the terminal 163 is extended. One filter device 370 is configured.

The insulator 127 formed of ceramic protrudes downward in the center of the bottom of the yoke 111, and the bottom of the insulator 127 is recessed upwardly so as to reduce the material requirement without shortening the insulation distance ( 128 is formed. In addition, a cutout 129 is formed under the insulator 127 so as to be in surface contact with the upper insulator 381 to extend an insulation distance and to reduce a material requirement.

On the other hand, a pair of choke coils 165 are provided on both sides of the insulator 127, and the choke coil 165 and the terminal 163 and the upper side between the choke coil 165 and the insulator 127. An upper insulating portion 381 is provided to extend the insulating distance from the conductor.

The upper insulating portion 381 is formed in a rectangular plate shape of a mica material, and a receiving hole 383 is formed in the center to accommodate a region of the insulator 127. The receiving hole 383 is provided with a pair of slits for guiding the upper insulating portion 381 to be easily bent along the longitudinal direction of the choke coil 165 when coupled. Here, the receiving hole 383 is formed to have a reduced diameter compared to the maximum outer diameter of the insulator 127 so as to overlap the cutout 129 of the insulator 127 for a predetermined section.

In this configuration, the upper insulation portion 381 extends the upper insulation distance of the choke coil 165 so that the choke coil 165 can be disposed close to the yoke 111 side, and the lower insulation. The unit 175 may reduce the height of the filter box 161 by allowing the bottom of the filter box 161 to be disposed close to the choke coil 165 or the terminal 163. The cutout 129 of the insulator 127 overlaps the upper insulator 381 so as to extend the insulation distance, thereby reducing the material requirement of the insulator 127.

1 is a cross-sectional view of a conventional magnetron,

2 is a side cross-sectional view of a magnetron according to a first embodiment of the present invention;

3 is a bottom cross-sectional view of the filter device of FIG.

4 is a side cross-sectional view of a magnetron according to a second embodiment of the present invention;

5 is a bottom view of the choke coil region of FIG. 4;

6 is a side cross-sectional view of a magnetron according to a third embodiment of the present invention;

7 is a bottom view of the choke coil region of FIG. 6;

8 is a modification of the second insulating member of FIG. 6,

9 is a side cross-sectional view of a magnetron according to a fourth embodiment of the present invention;

10 is a bottom view of FIG. 9;

11 is a side cross-sectional view of a magnetron according to a fifth embodiment of the present invention;

12 is a bottom view of the choke coil region of FIG. 11;

13 is a side cross-sectional view of a magnetron according to a sixth embodiment of the present invention;

14 is a bottom view of the choke coil region of FIG. 13;

15 is a side cross-sectional view of a magnetron according to a seventh embodiment of the present invention;

FIG. 16 is a bottom view of the choke coil region of FIG. 15; FIG.

17 is a plan view of the upper insulation of FIG. 15;

18 is a side sectional view of a magnetron according to an eighth embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

110: body 111: yoke

113: upper magnet 115: lower magnet

121: upper shield 123: lower shield

125: cooling fin 127: insulator

128: depression 131: anode

133 body 135: vane

137: antenna 151: cathode

153 filament 155 center lead

157: side lead 160: filter device

161: filter box 163: terminal

165 choke coil 167 through-type condenser

171: upper insulation portion 172: hollow portion

173: flange portion 175: lower insulation portion

Claims (20)

A main body having a yoke, an anode portion disposed inside the yoke and forming a cavity resonator, a cathode portion emitting hot electrons reaching the anode portion, and an insulator protruding from a bottom of the yoke; A choke coil having at least one area closer to the yoke than the bottom surface of the insulator, a filter box disposed below the yoke such that the insulator and the choke coil are accommodated therein, a bottom of the choke coil and the yoke or Magnetron including a filter device having an upper insulating portion is arranged to extend the insulating distance of the upper surface of the filter box. The method of claim 1, The upper insulating portion includes a first insulating member disposed to block a bottom surface of the yoke or an upper surface of the filter box, and a second insulating member disposed to block a boundary area between the first insulating member and the insulator. Magnetron, characterized in that. The method of claim 2, And the first insulating member and the second insulating member overlap each other for a predetermined period. The method of claim 2, The second insulating member may include a hollow portion in which the insulator is received, and a flange portion bent and extended from the hollow portion. The method of claim 4, wherein The hollow portion has a bent portion that is bent toward the insulator side, the insulator is a magnetron, characterized in that the cut portion formed corresponding to the bent portion is formed. The method of claim 4, wherein And the upper insulating portion further comprises a third insulating member disposed to overlap the flange portion. The method of claim 2, And the second insulating member has a circular or square cross-sectional shape. The method of claim 2, The first insulating member is a magnetron, characterized in that formed of mica. The method of claim 2, And the second insulating member is made of ceramic. The method of claim 1, The upper insulator is characterized in that the one side is in contact with the outer surface of the insulator and the other side is formed in contact with the bottom surface of the yoke or the upper surface of the filter box. The method of claim 10, The upper insulation is a magnetron, characterized in that formed of a flexible mica. The method of claim 10, The upper insulating portion has a receiving hole is formed so that the insulator is accommodated, the receiving hole is a magnetron, characterized in that the slit is formed to extend to the outside. The method of claim 10, The insulator is a magnetron, characterized in that the contact portion is formed in contact with the upper insulating portion. The method of claim 10, The upper insulator is magnetron, characterized in that formed of a ceramic. The method of claim 10, The upper insulator may include a hollow part in which the insulator is received, and a flange part bent outwardly from one end of the hollow part. The method of claim 15, The upper insulator further includes a bent part extending from the other end of the hollow part to the insulator side, wherein the insulator has a cutout portion formed corresponding to the shape of the bent part. The method of claim 10, Magnetron, characterized in that the bottom portion of the insulator is formed to be recessed upward. The method of claim 1, The filter box is formed to open upward, the upper insulator is a magnetron, characterized in that integrally formed to extend along the bottom of the yoke to the insulator. The method according to any one of claims 1 to 18, And a lower insulating part disposed in the filter box to extend an insulating distance between the choke coil and the filter box. The method of claim 19, The lower insulator is magnetron, characterized in that formed of mica.

Images