JPH11354037A - Magnetron apparatus and its manufacture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a magnetron device capable of improving assembly accuracy and stable operation. SOLUTION: An anode vane 12 consists of first vanes (12a-12j) having through-holes 15, 16 into which strap rings 13, 14 are inserted, and second anode vanes (12x, 12y) interposed between facing joining faces of cut parts 17, 18 of the strap rings 13, 14. Specified vanes of the second anode vanes (12x, 12y) and the first anode vanes (12a-12j) are electrically connected by the strap rings 13, 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a magnetron device used for microwave heating equipment such as a microwave oven or an industrial microwave oscillator, and a method of manufacturing the same.

[0002]

2. Description of the Related Art A conventional magnetron device comprises a cylindrical anode cylinder, and a plurality of plate-like members arranged radially around the center axis of the anode cylinder and fixed to the inner peripheral surface of the anode cylinder. And a strap ring for electrically connecting a specific one of the anode vanes.

A conventional method for manufacturing a magnetron device employing a center strap method is shown in FIG.
As shown in (1), the connecting portion 2a of the strap ring 2 is temporarily expanded, and the anode vanes 1 having the through holes 3 into which the strap ring 2 is inserted are inserted one by one from there. Next, after joining the connecting portions 2a of the strap ring 2, the strap ring 2 and the anode vane 1 are caulked so as to be located substantially at the center of the through hole 3 of the anode vane 1. Next, the anode vanes 1 are radially arranged and held in the anode cylinder by a jig (not shown).
A brazing material 4 is added to necessary portions of the strap ring 2 and the anode vane 1 and brazed and fixed in a furnace (not shown) (Japanese Utility Model Laid-Open No. 51-89859).

[0004]

However, in the conventional magnetron device and the method for manufacturing the same, the connecting portion 2a of the strap ring 2 is temporarily expanded or re-butted, and is positioned substantially at the center of the through hole 3 of the anode vane 1. As a result, the assembling becomes complicated, it takes time and the manufacturing cost increases, and the strap ring 2 is deformed at the time of assembling the strap ring 2, a gap is generated at the joint 2 a of the strap ring 2, and the like. (B)
As shown in the figure, the connecting portion 2a of the strap ring 2 may be deviated from the center of the through hole 3 of the anode vane 1 and fixed by brazing, and the assembling accuracy of the strap ring 2 is deteriorated, and the operation of the magnetron device is defective. There was a problem that occurs.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and has a simple structure, an assembly accuracy can be improved, and a stable operation can be performed, and a method of manufacturing the same. Is provided.

[0006]

According to the present invention, there is provided a magnetron device comprising: a cylindrical anode cylinder; radially arranged around the center axis of the anode cylinder; and an inner peripheral surface of the anode cylinder. In a magnetron device including a plurality of fixed plate-shaped anode vanes and a strap ring inserted into a through hole of the anode vane and electrically connecting a specific one, the anode vane includes the strap ring. A first anode vane having a through-hole into which the second anode vane is inserted, and the second anode vane sandwiched between facing mating surfaces of cut portions of the strap ring, and the second anode vane is formed by the strap ring. And a specific one of the first anode vanes.

[0007] With this configuration, the strap ring can be positioned by the second anode vane, and the assembly accuracy of the strap ring can be improved.

The distance between the mating surfaces of the cut portions of the strap ring that are opposed to each other is substantially the same as the plate thickness of the second anode vane sandwiched between the mating surfaces.

With this configuration, the first anode vane has the first
In addition, the strap ring can be more easily inserted into the second through hole, and the assembly accuracy of the strap ring can be further improved.

[0010] Further, a concave portion is formed in the second anode vane surface sandwiched between the cut portions of the strap ring.

With this configuration, the mating surface of the strap ring is restricted to a predetermined position by the second anode vane, and the assembling accuracy of the strap ring can be further improved.

Further, a mating surface of the cut portion of the strap ring is formed in parallel with the second anode vane surface.

With this configuration, the mating surface of the cut portion of the strap ring can be brazed and fixed to the plate surface of the second anode vane.

The method for manufacturing the magnetron device of the present invention is as follows.
A connecting step of inserting the strap ring from a cut portion of the strap ring into each through hole of the plurality of first anode vanes and sandwiching a mating surface of the cut portion with the second anode vane; A positioning step of radially arranging and positioning the first and second anode vanes in a cylindrical anode cylinder, and after the positioning step, the second anode vane and the first anode vane are positioned by the strap ring. A connection step for electrically connecting the anode vane to a specific one.

According to this method, in the connecting step, the first
The strap ring can be easily inserted into the through hole of the anode vane, and the strap ring can be positioned by the second anode vane.

[0016]

Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIG. 7, a magnetron device according to a first embodiment of the present invention includes a magnetron unit 6,
An external magnetic circuit section 7 for excitation and a leakage prevention section 8 are provided.

The magnetron section 6 includes a cylindrical anode cylinder 9
First and second pole pieces 10 and 11 respectively attached to upper and lower opening ends of anode cylinder 9, and anode cylinder 9
A plurality of plate-shaped anode vanes 12 arranged radially around the central axis thereof and fixed to the inner peripheral surface of the anode cylinder 9.
And strap rings 13 and 14 for electrically connecting specific ones of the anode vanes 12. As shown in FIGS. 1 to 4, the anode vane 12 includes a plurality of first anode vanes 12 a having a through hole 15 into which the strap ring 13 and the strap ring 14 are inserted.
~ 12j and the cut part 1 of the strap rings 13 and 14
The second anode vanes 12x and 12y are sandwiched between opposed mating surfaces 7 and 18. The second anode vanes 12x, 12x
y is electrically connected to a specific one of the first anode vanes 12a to 12j. That is, the anode vane 12
A first anode vane 12 having a first through-hole 15 having an inner diameter that does not contact and a second through-hole 16 having an inner diameter that makes contact with the outer diameter of the strap rings 13 and 14.
a to 12j and second anode vanes 12x and 12y having no second through holes 16 (shown by imaginary lines). As shown in FIGS. 2A and 2B, the first anode vanes 12a to 12j and the second anode vanes 12x and 12y are vertically inverted and sequentially arranged. Through holes 15, 16
The strap rings 13 and 14 are inserted from the cut portions 17 and 18 of the strap rings 13 and 14, respectively.
Anode rings 12x and 12y are provided with strap rings 13
The mating surfaces of the cut portions 17 and 18 are sandwiched. Thus, every other strap ring 13 has a second anode vane 12x and a particular first anode vane 12a,
12c, 12e, 12g, and 12i are connected.
The strap ring 14 is connected to the second anode vane 12.
y and specific first anode vanes 12b, 12d, 12
f, 12h, and 12j are connected. Also, FIG.
As shown in FIG. 6, the distance W between the facing mating surfaces of the cut portions 17 and 18 in the strap rings 13 and 14 is equal to the distance between the second anode vanes 12 sandwiched by the mating surfaces.
The thickness is set to be approximately equal to the thickness t of x and 12y. Further, as shown in FIG. 7, the first and second pole pieces 10 and 11 are provided with eyelet-shaped first and second metal cylinders 19 and 20, respectively. A microwave output terminal 22 is sealed on the metal cylinder 19 side via an insulating ring 21.

The external magnetic circuit section 7 includes an annular first permanent magnet 23a provided coaxially on the first pole piece 10 side.
And an annular second permanent magnet 23 b provided coaxially on the second pole piece 11 side, and provided on the outer peripheral surface of the anode cylinder 9 and dissipating heat generated inside the anode cylinder 9. It comprises a plurality of fins 24 for dissipating heat and a frame yoke 25 for surrounding the fins 24 and magnetically coupling the first pole piece 10 and the second pole piece 11.

The leak preventing portion 8 includes a filter case 26 provided below the frame yoke 25 and a filter case 2.
6, a stem 27 and a known LC filter circuit member 28 are provided to prevent leakage of high frequency noise.

Next, a method of manufacturing the magnetron device according to the first embodiment of the present invention using the above-described apparatus for manufacturing a magnetron device according to the present invention will be described.

As shown in FIGS. 1 and 2, in the method of manufacturing the magnetron device according to the first embodiment of the present invention, first, the first through hole 15 and the second through hole 16 are connected in the connecting step. A plurality of first anode vanes 12a to 12
In addition to inserting the strap rings 13 and 14 from the cut portions 17 and 18 of the strap rings 13 and 14 into the through holes 15 and 16 of the j (the first anode vanes 12 are sequentially inverted and upside down). Then, the mating surfaces of the cut portions 17 and 18 are sandwiched between the second anode vanes 12x and 12y having no second through holes 16.

Next, in the positioning step, the first anode vanes 12a to 12j and the second anode vanes 12x and 12y (the second anode vanes 1
2y, the second anode vanes 12x are arranged upside down and arranged radially on a dedicated assembling jig (not shown). Then, a temporary assembling pin (shown in the drawing) is placed at the center of the radial arrangement. ) Is press-fitted from below, and the first anode vanes 12a to 12a
12j and the second anode vanes 12x, 12y. As a result, the first anode vanes 12a to 12j and the second anode vanes 12x and 12y are positioned in the anode cylinder 9 in a temporarily assembled state.

Next, in the connection step, the anode cylinder 9 and the first and second anode vanes 12a to 12j, 12x, 12y
Then, the brazing material 29 is added to necessary parts such as the strap rings 13 and 14 and the first and second anode vanes 12a to 12j, 12x and 12y, and the resultant is heated in a furnace (not shown) at a temperature of 800 to 900 ° C. After heating, cool and braze. As a result, as shown in FIGS. 2A and 2B, every other strap ring 13 is connected to the second anode vane 12.
x and specific first anode vanes 12a, 12c, 12
e, 12g, and 12i are connected. In addition, the strap ring 14 includes the second anode vane 12y and the specific first
Anode vanes 12b, 12d, 12f, 12h, 12j
Are connected. Subsequently, the provisional assembling pin is pulled downward and the process is completed.

The anode cylinder 9 and the anode vane 12 are made of oxygen-free copper, and the strap rings 13 and 14 are made of oxygen-free copper whose surfaces are plated with silver.
Numerals 0 and 11 are made of a magnetic material such as iron, and the brazing material 29 is made of an alloy of silver and copper. In the first embodiment, the strap rings 13 and 14 are used.
Alternatively, the anode vane 12 is the raw material itself, but is not limited thereto, and may be a material in which a brazing material is applied to the surface of the raw material in advance.

Next, the operation and effect of the magnetron device and the method of manufacturing the same according to the first embodiment will be described.

In the magnetron device according to the first embodiment of the present invention, the first
First anode vanes 12a to 12j having through-holes 15 and second through-holes 16 and second anode vanes 12x and 12y having no second through-holes 16 are provided. 13 and 14 are the first anode vanes 1
2a to 12j first through hole 15 and second through hole 1
6, and the opposing mating surfaces of the cuts 17, 18 are connected to the second anode vane 12.
Since the second anode vanes 12x and 12y are sandwiched between them, the second anode vanes 12x and 12y are electrically connected to specific ones of the first anode vanes 12a to 12j. , 12y, strap ring 13,
14 can be positioned in the rotation direction R, and the assembling accuracy of the strap rings 13 and 14 can be improved. As a result, the manufacturing cost can be reduced, and the magnetron device can operate stably.

The anode vane 12 includes first anode vanes 12a to 12j having a first through hole 15 and a second through hole 16 which do not contact the strap rings 13 and 14, and a second anode vane 12j. And the second anode vanes 12x and 12y having no through-holes 16, and the first anode vanes 12a to 12j and the second anode vanes 12x and 12y are vertically inverted and sequentially arranged. By doing so, the magnetron unit 6 can be constituted by two types of anode vanes.

Further, the gap W between the mating surfaces of the cut portions 17 and 18 in the strap rings 13 and 14 is set such that the distance W between the mating surfaces between the second anode vanes 12
Since the thicknesses x and 12y are approximately the same, the strap rings 13 and 14 are easily inserted into the first through holes 15 and the second through holes 16 of the first anode vanes 12a to 12j. . As a result, the strap rings 13, 1
4 is prevented, and the assembling accuracy of the strap rings 13 and 14 can be further improved.

In the method of manufacturing the magnetron device according to the first embodiment of the present invention, the connecting step includes the steps of connecting the first through-hole 15 and the second through-hole 16 of each of the plurality of first anode vanes 12a to 12j. The strap rings 13 and 14 are inserted from the cut portions 17 and 18 of the strap rings 13 and 14, and the cut portions 17 and 18 are aligned with the second anode vanes 12x and 12y that do not have the second through holes 16. By sandwiching the surfaces, the strap rings 13 and 14 are easily inserted into the first through hole 15 and the second through hole 16 of the first anode vanes 12a to 12j, and the second anode vanes 12x and 12y The strap rings 13 and 14 can be positioned in the rotation direction R, and the assembly accuracy of the strap rings 13 and 14 can be improved. As a result, manufacturing costs can be reduced.

[0031]

Next, an embodiment in which the effect of the present invention has been confirmed will be described.

The magnetron device according to the embodiment of the present invention (hereinafter referred to as the magnetron device)
The present invention has a magnetron unit 6 having the configuration shown in FIG. 7 and has ten first anode vanes 12a to 12j.
(Length 13.5mm, width 15.5m of vane board)
m, thickness 2 mm, inner diameter φ3 of first through hole 15
mm, the inner diameter of the second through hole 16 is φ2.05 mm) and the two second anode vanes 12x and 12y (vertical dimension of the vane plate 13.5 mm, horizontal dimension 15.5 mm, thickness dimension 2 mm, 1 through-holes 15 are radially arranged at regular intervals in the radial direction.
The diameters of the wire 3 and 14 were 2 mm, and the distance W between the mating surfaces in the cut portions 17 and 18 was 2.2 mm.

For comparison, two sheets of the second anode vanes 12x and 12y are replaced with the first anode vanes 12a.
Change to the same as ~ 12j, and strap ring 1
A conventional magnetron device (hereinafter referred to as a conventional product) having the same specifications as described above except for changing the distance W between the mating surfaces in the cut portions 17 and 18 in the sections 3 and 14 to 0.5 mm was also manufactured.

Then, when the manufacturing time in the connecting step and the operation yield of the magnetron device were examined, the following results were obtained.

The production time of the product of the present invention in the connecting step is 7 minutes, which is about 50% shorter than the conventional product of 15 minutes. In addition, regarding the operation yield of 1000 magnetron devices, 105 products of the conventional product were defective.
The product of the present invention was 0 and no defect was found.

FIGS. 8A and 8B show a magnetron device according to a second embodiment of the present invention. In this embodiment, the magnetron device according to the first embodiment is different from the magnetron device according to the first embodiment in that a strap ring is used. The difference is that a concave portion 30 is formed in the plate thickness t direction of the second anode vanes 12x, 12y on the surfaces of the second anode vanes 12x, 12y sandwiched between the cut portions 17, 18 of 13 and 14. . In addition, FIG.
The difference from (a) is that a hole 31 is provided.

According to this embodiment, the mating surfaces of the strap rings 13 and 14 are the same as the second anode vanes 12x and 12x.
y, the strap rings 13, 1
The assembly accuracy of No. 4 can be further improved.

FIGS. 9A and 9B show a magnetron device according to a third embodiment of the present invention. In this embodiment, the magnetron device according to the first embodiment is different from the magnetron device according to the first embodiment in that a strap ring is used. The difference is that the mating surfaces of the cut portions 13 and 13 at 13 and 14 are formed parallel to the plate surfaces of the second anode vanes 12x and 12y. FIG.
(A) of FIG. 8 shows that the surfaces of the second anode vanes 12x and 12y are provided with recesses 32 in a shape along the cut portions 17 and 18 of the strap rings 13 and 14, and FIG. The difference is that the surfaces of 12x and 12y are provided with protrusions 33 in a shape along the cut portions 17 and 18 of the strap rings 13 and 14.

According to this embodiment, the mating surfaces of the cut portions 17, 18 of the strap rings 13, 14 are in close contact with the plate surfaces of the second anode vanes 12x, 12y.
Strap rings 13 and 14 and second anode vane 12
The fixation by brazing with x and 12y is strengthened, and the mechanical fixing strength and the electrical connection are further improved.

In the magnetron apparatus according to the embodiment of the present invention, the number of anode vanes has been described as being 12. However, the present invention is not limited to this, and the number of anode vanes may be an even number. In addition, as the number of anode vanes increases, the effect of shortening the manufacturing time can be increased by using the method of the present invention as compared with the case of using the conventional method.

Further, the cut portion of the strap ring having a circular cross section is inserted into the circular first and second through holes of the first anode vane, and the cut portion of the strap ring is aligned with the second anode vane. By sandwiching the surface, the second
The first anode vane is electrically connected to a specific one of the first anode vanes. The first and second through holes of the first anode vane are not limited to circular, but may be elliptical holes, A slot, a triangular hole, a square hole, or a slit may be provided from the end face of the first anode vane in the axial direction of the temporary assembling pin.
The cross section of the strap ring is not limited to a circle, but may be an ellipse, a triangle, a square, or the like.

Further, a combination of the number of the anode vanes, the shape of the through hole of the first anode vane, the shape of the strap ring, and the like may be used.

[0043]

As described above, in the magnetron device according to the present invention, the anode vane has the first anode vane having the through hole into which the strap ring is inserted, and the cut portion of the strap ring is opposed to each other. The second anode vane is sandwiched between surfaces, and the strap ring electrically connects the second anode vane and a specific one of the first anode vanes. As a result, the assembly accuracy of the strap ring is improved, and the magnetron device can operate stably.

Further, the gap between the facing mating surfaces of the cut portions of the strap ring is substantially the same as the plate thickness of the second anode vane sandwiched between the mating surfaces, so that the assembly accuracy of the strap ring can be reduced. It can be further improved.

Further, since the concave portion is formed on the second anode vein surface sandwiched between the cut portions of the strap ring, the assembly accuracy of the strap ring can be further improved.

Also, since the facing mating surfaces of the cut portions of the strap ring are formed in parallel with the second anode vein surface, brazing and fixing of the strap ring and the second anode vein becomes strong, The mechanical bond strength and the electrical connection can be further improved.

In the method for manufacturing a magnetron device according to the first embodiment of the present invention, the connecting step includes inserting the strap ring from the cut portion of the strap ring into each through hole of the plurality of first anode vanes. By sandwiching the mating surface of the cut portion between the second anode vanes, the assembly accuracy of the strap ring can be improved and the manufacturing cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view showing a configuration of a main part of a magnetron unit of a magnetron device according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a configuration of a main part of the magnetron unit and a connection state between a strap ring and an anode vane.

FIG. 3 is a front view showing a first anode vane in the magnetron unit.

FIG. 4 is a front view showing a second anode vane in the magnetron unit.

FIG. 5 is a plan view showing a strap ring in the magnetron unit.

FIG. 6 is a sectional view showing a connection state between a strap ring and a second anode vane in the magnetron unit.

FIG. 7 is a sectional view showing the configuration of the magnetron device according to the first embodiment of the present invention;

FIG. 8 illustrates a second embodiment of the magnetron device according to the present invention.
Sectional view showing the connection state with the anode vane

FIG. 9 shows a second embodiment of the magnetron device according to the present invention, in which a magnet ring of the magnetron unit and a second strap ring are used.
Sectional view showing the connection state with the anode vane

FIG. 10 is a sectional view showing a connection state between a strap ring and an anode vane in a magnetron unit of a conventional magnetron device.

[Explanation of symbols]

 9 Anode cylinder 12 Anode vane 12a to 12j First anode vane 12x, 12y Second anode vane 13, 14 Strap ring 15 First through hole 16 Second through hole 17, 18 Cutting part

Claims (6)

[Claims] 1. A cylindrical anode cylinder, and a plurality of plate-shaped anode vanes radially arranged in the anode cylinder around a central axis thereof and fixed to an inner peripheral surface of the anode cylinder. A strap ring inserted into a through hole of the anode vane to electrically connect a specific one of the anode vanes, wherein the anode vane has a first through hole into which the strap ring is inserted. A specific one of the second anode vein and the first anode vein, comprising an anode vein and the second anode vein sandwiched by opposing mating surfaces of cut portions of the strap ring. And a magnetron device electrically connected to the magnetron device. 2. The anode vane does not have a first anode vane having a first through hole not in contact with the strap ring and a second through hole contacting with the strap ring, and does not have the second through hole. The magnetron device according to claim 1, comprising a second anode vane, wherein the first anode vanes are vertically inverted and sequentially arranged. 3. A gap between opposing mating surfaces of a cut portion of the strap ring is substantially equal to a plate thickness of a second anode vane sandwiched by the mating surfaces. Or the magnetron device according to claim 2. 4. The magnetron device according to claim 1, wherein a recess is formed in the second anode vein surface sandwiched between the cut portions of the strap ring. 5. The magnetron device according to claim 1, wherein the mating surfaces of the cut portions in the strap ring are formed in parallel with the second anode vein surface. 6. A connecting step of inserting the strap ring from a cut portion of the strap ring into each through hole of the plurality of first anode vanes, and sandwiching a mating surface of the cut portion with the second anode vane. After the connecting step, a positioning step of arranging and positioning the first and second anode vanes radially in a cylindrical anode cylinder, and after the positioning step, the second anode is formed by the strap ring. A method for electrically connecting a vane to a specific one of the first anode vanes.