CN1196164C - Magnetron - Google Patents
Magnetron Download PDFInfo
- Publication number
- CN1196164C CN1196164C CNB021418829A CN02141882A CN1196164C CN 1196164 C CN1196164 C CN 1196164C CN B021418829 A CNB021418829 A CN B021418829A CN 02141882 A CN02141882 A CN 02141882A CN 1196164 C CN1196164 C CN 1196164C
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- Prior art keywords
- metal sheet
- annular metal
- lug boss
- hole
- magnetron
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- Expired - Fee Related
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J23/00—Details of transit-time tubes of the types covered by group H01J25/00
- H01J23/02—Electrodes; Magnetic control means; Screens
- H01J23/10—Magnet systems for directing or deflecting the discharge along a desired path, e.g. a spiral path
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J23/00—Details of transit-time tubes of the types covered by group H01J25/00
- H01J23/16—Circuit elements, having distributed capacitance and inductance, structurally associated with the tube and interacting with the discharge
- H01J23/18—Resonators
- H01J23/20—Cavity resonators; Adjustment or tuning thereof
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J25/00—Transit-time tubes, e.g. klystrons, travelling-wave tubes, magnetrons
- H01J25/50—Magnetrons, i.e. tubes with a magnet system producing an H-field crossing the E-field
- H01J25/52—Magnetrons, i.e. tubes with a magnet system producing an H-field crossing the E-field with an electron space having a shape that does not prevent any electron from moving completely around the cathode or guide electrode
- H01J25/58—Magnetrons, i.e. tubes with a magnet system producing an H-field crossing the E-field with an electron space having a shape that does not prevent any electron from moving completely around the cathode or guide electrode having a number of resonators; having a composite resonator, e.g. a helix
- H01J25/587—Multi-cavity magnetrons
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- Microwave Tubes (AREA)
Abstract
There is provided a magnetron capable of preventing a moving-off of an annular metal plate for conducting magnetic field around a cathode from a prescribed position even if vibrations or impacts are applied to it in assembling, improving the workability in its assembly, and also having high magnetic efficiency. SOLUTION: This magnetron comprises a pair of permanent magnets 21 disposed at an upper side and a lower side of a cylindrical metal vessel 20 which forms a part of a vacuum vessel and is hermetically jointed to an anode 10 at its both ends, an annular metal plate 23 which is disposed between the permanent magnets 21 and the cylindrical metal vessel 20, and a cathode 15 in which a filament is disposed at the position around the central axis of the anode 10. Here, a convex portion 20b which is formed in flat portion 20a of the cylindrical metal vessel 20 is fitted against a passing hole 23a which is bored into the annular metal plate 23 so that the ring metal plate 23 is fixed to the cylindrical metal vessel 20.
Description
Technical field
The present invention relates to be installed in the magnetron of the generation microwave of microwave oven.
Background technology
Magnetron for microwave oven in the past, fragmentary cross-sectional view as shown in Figure 7, sealed engagement cylindrical metal container 101 on the two ends of anode 100 is arranged a pair of annular permanent 102 respectively in the above and below of this cylindrical metal container 101.So, between cylindrical metal container 101 and the annular permanent 102 annular metal sheet 104 is set, so that be arranged near the more magnetic flux of derivation of the negative electrode 103 of anode 100 central portions, do not increase magnetic force, the capacity of permanent magnet 102, seek magnetic circuit efficiency.
The erection sequence of such magnetron is to place permanent magnet 102 in the bottom surface of lower yoke 105, and configuration magnetron main body is so that be formed on the inboard that the lug boss 106 of cylindrical metal container 101 is positioned at the inner periphery portion of annular metal sheet 104.Then, on top cylinder shape canister 101, in kind arrange annular metal sheet 104, again after, stack permanent magnet 102 and upper magnet yoke 107 in order, utilize bolt 108 fixedly upper magnet yoke 107 and lower yoke 105.
But, in described structure, utilize bolt 108 fixedly after upper magnet yoke 107 and the lower yoke 105, because being formed on the lug boss 106 of cylindrical metal container 101 contacts with the inner periphery portion of annular metal sheet 104, so can not cause the offset of annular metal sheet 104, but in assembling, be subjected to vibration, impact, then the inner periphery of annular metal sheet 104 is costed lug boss 106, annular metal sheet 104 is offset from given position, if utilize bolt 108 fixedly upper magnet yoke 107 and lower yoke 105 in this state, the problem of magnetic circuit degradation in efficiency is arranged then.And, in case the offset of annular metal sheet 104 then can not got back to given position, there is the problem that reduces operating efficiency.
Summary of the invention
The object of the present invention is to provide a kind of magnetron, even vibration, impact are arranged in assembling, the annular metal sheet of derivation magnetic flux also is not easy to produce offset, magnetic force efficient height, the raising service behaviour from given position near the negative electrode.
Magnetron of the present invention comprises: sealed engagement is at the two ends of anode, form the part of vacuum tank the cylindrical metal container, be arranged in the above and below of this canister pair of permanent magnets, be arranged in the negative electrode that the annular metal sheet between this permanent magnet and the cylindrical metal container, described anodes centre axial region dispose filament, it is characterized in that: be provided with described annular metal sheet is fixed on fixture in described permanent magnet or the described cylindrical metal container one at least.
According to described structure, on described filament, switch on, and then described negative electrode added negative voltage, during as the high-tension electricity of 4kV, described annular metal sheet makes the flux concentrating of described permanent magnet at described cathode axis, so from the electron cyclotron that described filament is emitted, the high-frequency electric field synchronized oscillation of this circulating electrons and described anode and emit microwave.
So, described annular metal sheet is by a side of fixing described permanent magnet of described fixture or described cylindrical metal container, even so in finishing magnetron assembling operation process, be subjected to vibration, impact, described annular metal sheet also is not easy to produce the position deviation of given position, the magnetic flux of described permanent magnet is concentrated near the described negative electrode reliably, prevent that magnetic circuit efficiency from reducing.
In addition, described fixture is that the adhesive applicating of evaporation below 200 ℃ is feature on described annular metal sheet, so by described bonding agent, can come described annular metal sheet is fixed on a side of described permanent magnet or described cylindrical metal container with simple method, therefore, even vibrated or impact in the operation of finishing the assembling magnetron, described annular metal sheet can not produce the position deviation from given position yet.Also have, in the later inspection operation of the assembling of finishing magnetron, for example, confirm in the inspection operation of oscillatory work, because the heating of magnetron itself, near the described annular metal sheet temperature reaches more than 200 ℃, described adhesive material evaporation, when being installed in microwave oven, described bonding agent can be not residual, then there be not the residual of described bonding agent to enter in the microwave oven storehouse, and attached to the situation of food.
In addition, described fixture, on described tubular canister, form lug boss, and on described annular metal sheet, form through hole, it is feature that described lug boss is cooperated with described through hole, therefore described through hole becomes location hole, when can be configured in given position to described annular metal sheet simply, according to the fixing described annular metal sheet of the cooperation of described lug boss and described through hole, therefore, even in finishing magnetron assembling operation, vibrated, impact, can prevent that also described annular metal sheet from producing skew from given position.
In addition, described fixture is to form lug boss at described permanent magnet, and on described annular metal sheet, form through hole, it is feature that described lug boss is engaged in described through hole, therefore, described through hole becomes location hole, can between described cylindrical metal container and described permanent magnet, arrange described annular metal sheet by given position, simultaneously, utilize described lug boss and fixing described annular metal sheet of cooperating of described through hole, therefore, vibrated even finish in the magnetron assembling operation, impact, can prevent that also described annular metal sheet from producing skew from given position.
Also have, the height that makes described lug boss is a feature greater than the thickness of described annular metal sheet, therefore, after described lug boss and described through hole cooperate, the front end of described lug boss protrudes from through hole, when described annular metal sheet is fixed on described cylindrical metal container, form the gap between described permanent magnet and the described annular metal sheet, when described annular metal sheet is fixed on described permanent magnet, form the gap between described cylindrical metal container and the described annular metal sheet, therefore, the heat of magnetron main body is not easy to pass to described permanent magnet, can suppress that Yin Wendu rises and the reduction of the magnetic flux density of the described permanent magnet that causes.
In addition, described bonding agent is to be injected to feature from described through hole, therefore fix by described bonding agent is firm after cooperating described lug boss and described through hole, so, even in finishing magnetron assembling operation, be subjected to vibration, impact, can prevent effectively that described annular metal sheet from producing skew from given position.Also have, can be used in the inlet of described bonding agent, the coating operation that can improve described bonding agent to described through hole with location hole formation.
In addition, the number of described lug boss and described through hole is at least and is feature more than two, so can simply finish the location of described annular metal sheet, can obviously improve the operation that described annular metal sheet is arranged in given position.
In addition, described fixture, on described cylindrical metal container, form lug boss, form recess at described annular metal sheet, cooperating described lug boss and described recess is feature, so described recess becomes the location, can be arranged in given position to described annular metal sheet simply, simultaneously, utilize the cooperation of described lug boss and described recess to fix described annular metal sheet, therefore, even in finishing magnetron assembling operation, be subjected to vibration, impact, can prevent that described annular metal sheet from producing skew from given position.
And then, described fixture, on described permanent magnet, form lug boss, on described annular metal sheet, form recess, cooperating described lug boss and described recess is feature, described lug boss becomes the location, can on given position between described cylindrical metal container and the described permanent magnet, arrange described annular metal sheet, simultaneously, utilize the cooperation of described lug boss and described recess to fix described annular metal sheet, therefore, even in finishing magnetron assembling operation, vibrated, impact, can prevent effectively that described annular metal sheet from producing skew from given position.
In addition, because described bonding agent is to be injected to feature from described recess, after described recess injects described adhesive material, cooperate described lug boss and described recess to come firm fixing described annular metal sheet, therefore, even in finishing magnetron assembling operation, be subjected to vibration, impact, can prevent effectively that described annular metal sheet from producing skew from given position.Also have,, can be used in the inlet of described adhesive material, the coating operation that can improve described adhesive material as the described recess that the location forms.
Also have, the number of described lug boss and described recess is feature more than at least two, so can locate described annular metal sheet simply, can obviously improve the operation that described annular metal sheet is arranged in given position.
Description of drawings
Fig. 1 is the sectional arrangement drawing of the magnetron of the expression embodiment of the invention 1.
Fig. 2 is the sectional arrangement drawing of the major part of embodiment 1 magnetron.
Fig. 3 is the figure of the assembling sequence of expression embodiment 1 magnetron.
Fig. 4 is the sectional arrangement drawing of this magnetron cathode.
Fig. 5 is the sectional arrangement drawing of the magnetron major part of the expression embodiment of the invention 2.
Fig. 6 is the figure of the assembling sequence of expression embodiment 2 magnetrons.
Fig. 7 represents the profile of the part of magnetron in the past.
Symbol description
10: anode
20,29: the tubular canister
21,30: permanent magnet (annular poles sheet)
23: annular metal sheet
19: filament
24: bonding agent (fixture)
20b, 30b: lug boss (fixture)
23a: through hole (fixture)
Embodiment
Embodiment 1
To embodiments of the invention 1, be elaborated according to figure.
Fig. 1 is the sectional arrangement drawing of the magnetron of the expression embodiment of the invention 1, Fig. 2 is the sectional arrangement drawing of major part of the magnetron of the embodiment of the invention 1, Fig. 3 is the figure of assembling sequence of the magnetron of the expression embodiment of the invention 1, and Fig. 4 is the profile of negative electrode of the magnetron of the embodiment of the invention 1.
The 1st, the two-electrode vacuum tube that lower yoke 2 that コ font shape forms and upper magnet yoke 3 are surrounded, that is, the main part of magnetron, described lower yoke 2 and upper magnet yoke 3 are to utilize bolt 4 fixing.
The 5th, be fitted in the cold sink of main part 1, the end of this cold sink 5 is close to described lower yoke 2 inner faces, so that make the heat radiation of described main part 1.
The 6th, the inner installation is used for the electric capacity 7 of noise suppression and the housing of choke 8, is close to mounting cover 9 on the peristome of this housing 6, in order to avoid noise is outwards missed.
The 10th, the anode of magnetron, this anode 10 is to be made by oxygen-free copper, comprise the blade 12 of the anode cylinder 11 of a vacuum wall part that forms described main part 1, the even number that is provided with radiation shapes in the inboard of this anode cylinder 11, this blade 12 is utilized every the interior band 13 of the minor diameter (inboard) of a blade and the outer band 14 of major diameter (outside) be connected, produce the structure that stable π wave mode is vibrated.
The 15th, the negative electrode that the two ends of a pair of cathode leg 16 are formed by the filament 19 of top cap head 17 and 18 clampings of edge cap head by the power supply from described cathode leg 16, radiates hot electron from described filament 19.At this moment, the temperature of described filament 19 approximately reaches 1800 ℃, and therefore, the material of described top cap head 17, described edge cap head 18 and described cathode leg 16 uses the molybdenum of high-melting-point, high rigidity.
The 20th, sealed engagement is at the two ends of described anode 10, constitute the cylindrical metal container of a vacuum tank part, the planar portions 20a of this cylindrical metal container 20 is provided with that the back will narrate, the through hole 23a that cooperates annular metal sheet 23, the fixture that is used for fixing annular metal sheet 23 promptly, forms lug boss 20b, the height of this lug boss 20b is 0.7mm, has four.
The 21st, the planar portions 20a that is arranged in described cylindrical metal container 20 is upper and lower, the annular permanent magnnet of being made by ferrite; For the flux concentrating of this permanent magnet 21 at the front end of described blade 12 be arranged on action space between the described negative electrode 15 of central part of described anode cylinder 11, be respectively equipped with pole piece 22.
The 23rd,, be configured in the annular metal sheet between the planar portions 20a of described permanent magnet 21 and described cylindrical metal container 20, this annular metal sheet 23 has four to cooperate the fixture that described annular metal sheet 23 is fixed on the given position of described cylindrical metal container 20 with described lug boss 20b, that is through hole 23a; Same with described pole piece 22, can be the flux concentrating of described permanent magnet at action space.In addition, the thickness of described annular metal sheet 23 is than the low 0.4mm of the height of described lug boss 20b (being 0.7mm in the present embodiment), the front end of described lug boss 20b protrudes from described through hole 23a, contact with described permanent magnet 21, therefore, when arranging described main body, between described permanent magnet 21 and described annular metal sheet 23, produce the gap S of 0.3mm.Thereby because described gap S, heat is not easy to be delivered to described permanent magnet 21 from main part 1, has suppressed because the reduction of the magnetic flux density of the described permanent magnet 21 that the temperature rising causes.
The 24th,, harden within several seconds, reach 200 ℃ of just bonding agents of evaporation, this bonding agent 24 is after described lug boss 20b and described through hole 23a cooperation, inject from described through hole 23a, described annular metal sheet 23 is firm to be fixed on the planar portions 20a of described cylindrical metal container 20.Because such formation, even be subjected to vibration, impact in magnetron assembling operation, described annular metal sheet 23 can not produce the skew from given position.
The 25th,, by the high insulator stem of thermal endurance that aluminium pottery etc. is made, this insulator stem 25 is provided with a pair of through hole 25a, inserts external lug 26 described later.
The 26th,, the external lug of the formation drum that the metal foil of nickel plating makes is carried out on the surface, be inserted into described cathode leg 16 by soldered joint at a 26a of end opening portion of this external lug 26, on the bending part 26c that other end peristome 26b forms, be welded with described choke 8.So being connected above sealing metal plate 27 a described later of 26a of end opening portion of this external lug 26 and described cathode leg 16, that is, a side of described negative electrode 15 connects, and therefore, can shorten the described cathode leg 16 of high price, has reduced fee of material as far as possible.
The 27th,, the sealing metal plate of fixing described external lug 26, sealing metallic plate 27 is separated by central groove 28 electricity, and sealed engagement is being formed at described through hole 25a composition surface on every side.
In the present embodiment, the number of lug boss and through hole is respectively established four, just can reach desirable purpose in order to locate to be provided with at least more than two.
In addition, formed through hole, also can but form recess in order to cooperate with lug boss.
Below, the assembling sequence of described structure is described.
Described housing 6 is installed on described lower yoke 2, is placed described permanent magnet 21 in the bottom surface of described lower yoke 2.
Then, the lug boss 20b of described cylindrical metal container 20 is cooperated with the through hole 23a of described annular metal sheet 23, described annular metal sheet 23 is fixed on after the described tubular canister 20, described bonding agent 24 is injected from described through hole 23a.Described bonding agent 24 hardened within the several seconds, described annular metal sheet 23 firm being fixed on the described tubular canister 20.
Then, after described main part 1 is pressed into described cold sink 5, below described external lug 26 is placed on, described main part 1 is placed on face on the described permanent magnet 21, described permanent magnet 21 will be placed in the top of the planar portions 20a of superincumbent described tubular canister 20.
So, utilize bolt 4 to wait and install after described upper magnet yoke 3 and the described lower yoke 2, described electric capacity 7, described choke 8 and described lid 9 are installed on described housing 6, finish the installation of magnetron.
According to described formation, on described negative electrode, add negative voltage such as the high-tension electricity of 4kV, also make the electric current of the described filament about 10A in 19 upper reaches in described external lug 26 power supplies, the magnetic flux of then described permanent magnet 21 concentrates on action space by described annular metal sheet 23, described pole piece 22, the electronics cycle that described filament 19 is emitted, the high-frequency electric field of this cycle electronics and described negative electrode 10 produces vibration synchronously, emits microwave.At this moment, the microwave delivery efficiency of magnetron is about 70%, and remaining 25% is the thermal loss of described main part 1, so near the instantaneous of described annular metal sheet 23 becomes more than 200 ℃.Therefore, described bonding agent 24 is what evaporate below 200 ℃, and described bonding agent 24 can be not residual.
Then, described annular metal sheet 23 cooperates described lug boss 20b and described through hole 23a, be fixed on the described tubular canister 20, even so in finishing magnetron assembling operation, be subjected to vibration, impact, can not produce the skew of described annular metal sheet 23a from given position, the magnetic flux of described permanent magnet 21 concentrate on effectively described anode 15 near, the effect that prevents that magnetic circuit efficient from reducing is arranged.
In addition, described bonding agent 24 is coated on the described annular metal sheet 23, so described annular metal sheet 23 firm being fixed on the described tubular canister 20, even in finishing magnetron assembling operation, be subjected to vibration, impact, can not produce of the skew of described annular metal sheet 23 from given position.Also have, finish magnetron and assemble the inspection of laggard row, for example confirm in the inspection operation of oscillatory work, neighbouring (temperature) of described annular metal sheet 23 reaches more than 200 ℃, therefore, and described bonding agent 24 evaporations, when being installed in microwave oven, described bonding agent 24 can be not residual, and the evaporant that can not produce described bonding agent 24 enters in the storehouse of microwave oven and attached to food, effect no problem on the health arranged.
In addition, the number of described lug boss 20b and described through hole 23a is (being four in the present embodiment) more than at least two, can locate described annular metal sheet 23 easily, is significantly improved and described annular metal sheet 23 is arranged in the effect of the operation of given position.
In addition, the height of described lug boss 20b (being 0.7mm in the present embodiment) is greater than the thickness (being 0.4mm in the present embodiment) of described annular metal sheet 23, the front end of described lug boss 20b protrudes (being 0.3mm the present embodiment) from described through hole 23a, therefore, when arranging described main part 1, form described gap S between the planar portions 20a of described permanent magnet 21 and described annular metal sheet 20, make the heat of described main part 1 be not easy to pass to described permanent magnet 21.Thereby, the effect of the reduction of the magnetic flux density that suppresses the permanent magnet 21 that the rising owing to temperature causes is arranged.
In addition, because described bonding agent 24 injects from described through hole 23a,, the effect that improves described bonding agent 24 coating operating efficiencies is arranged as locating the inlet that is used in described bonding agent 24 with the described through hole 23a that forms.
In the present embodiment, form described through hole 23a, form recess and also can in order to cooperate with described lug boss 20b.Then, after recess injects described bonding agent 24, utilize to cooperate described lug boss 20b and recess, make described annular metal sheet 23 firm fixing.Therefore, even in finishing magnetron assembling operation, be subjected to vibration, impact, can prevent effectively that described annular metal sheet 23 from producing skew from given position, simultaneously, the inlet that is used in described bonding agent 24 as the recess of locating formation, the effect of the operation that can improve the described bonding agent 24 of coating is arranged.
Embodiment 2
Below, to embodiments of the invention 2, describe based on Fig. 5 and Fig. 6.Fig. 5 is the major part sectional arrangement drawing of the magnetron of expression embodiments of the invention 2, and Fig. 6 is the figure of the assembling sequence of the same magnetron of expression.In addition, to the attached identical symbol of embodiment 1 identical construction, (here) only illustrates different piece.
The 29th,, sealed engagement constitutes the tubular canister of a vacuum tank part at the two ends of described anode 10.
The 30th,, be arranged in planar portions 29a upper and lower of described tubular canister 29, material is ferritic annular permanent magnnet, on the planar portions 30a of this permanent magnet 30, be provided with described through hole and cooperate the fixture that is used for fixing described annular metal sheet 23, promptly, four lug boss 30b, the height of this lug boss 30b are in the present embodiment than the high 0.7mm of the thickness of described annular metal sheet 23 (being 0.4mm in the present embodiment).So, described annular metal sheet 23 is fixed on the given position of described permanent magnet 30 by the cooperation of described lug boss 30b and described through hole 23b, same with described pole piece 22, be arranged between the planar portions 29a of described permanent magnet 30 and described cylindrical metal container 29, so as the flux concentrating of described permanent magnet 30 at action space.Because such formation, even described lug boss 30b cooperates with described through hole 23a, the front end of described lug boss 30b protrudes from described through hole 23a, contact with described cylindrical metal container 29, when described main part 1 disposes, form the gap S of 0.3mm between described cylindrical metal container 29 and the described annular metal sheet 23, therefore, the heat of described main part 1 is not easy to pass to described permanent magnet 30, suppresses because the rising of temperature causes the reduction of the magnetic flux density of described permanent magnet 30.
In addition, at described lug boss 30b with after described through hole 23a cooperates, inject described bonding agent 24 from described through hole 23a, the described annular metal sheet 23 firm planar portions 30a that are fixed on described permanent magnet 30, therefore, even in assembling magnetron operation, be subjected to vibration, impact, can not produce of the skew of described annular metal sheet 23 from given position.
In the present embodiment, the number of lug boss and through hole respectively is four, but in order to be positioned to the rare institute's syllabus that just can reach more than two.
In addition, form through hole, also can but form recess in order to cooperate with lug boss.
Below, the assembling sequence of described structure is described.
Described housing 6 is installed on the described lower yoke 2, described permanent magnet 30 is placed on the bottom surface of described lower yoke 2.
Then, on the lug boss 30b of described permanent magnet 30, cooperate the through hole 23a of described annular metal sheet 23, described annular metal sheet 23 is fixed on after the described permanent magnet 30, inject described bonding agent 24 from described through hole 23a.Described bonding agent 24 hardened in several seconds, and described annular metal sheet 23 is fixed on the described permanent magnet 30.Also have, the described permanent magnet 30 that is configured in the top is with on the fixing described annular metal sheet 23 of same method.
Again, after described cold sink 5 is pressed into described main part 1, described external lug 26 down, described main part 1 be placed on described permanent magnet 21 above, further, the described permanent magnet 30 of the described annular metal sheet 23 of predetermined fixed is placed in the top of the planar portions 29a of described cylindrical metal container 29 up.
Then, utilize screw 4 to install after yoke 3 and the lower yoke 2, described electric capacity 7, described choke 8 are installed on described housing 6 and are covered 9, finish the assembling of magnetron.
By described formation, described annular metal sheet 23, described lug boss 30b and described through hole 23a are cooperated, be fixed on the described permanent magnet 30, therefore, even in assembling magnetron operation, be subjected to vibration, impact, can not produce of the skew of described annular metal sheet 23 from given position, the magnetic flux of described permanent magnet 30 concentrate on effectively described negative electrode 15 near, the effect that prevents that magnetic circuit efficient from reducing is arranged.
In addition, described bonding agent 24 is coated on the described annular metal sheet 23, therefore, described annular metal sheet 23 firm being fixed on the described permanent magnet 30, even in assembling magnetron operation, be subjected to vibration, impact, can not produce of the skew of described annular metal sheet 23 from given position.Also have, in the inspection operation of after finishing the assembling magnetron, carrying out, for example, confirm in the inspection operation of oscillatory work that near the temperature the described annular metal sheet 23 reaches more than 200 ℃, therefore, 24 evaporations of described bonding agent, when being installed in microwave oven, can residual described bonding agent 24, the residue that described bonding agent 24 can not take place enters in the microwave oven storehouse attached to food (phenomenon), and effect no problem on the health is arranged.
Also have, the number of described lug boss 30b and described through hole 23a has at least more than two (in the present embodiment to be 4), can simply locate described annular metal sheet 23, is significantly improved and described annular metal sheet 23 is arranged in the effect of given position operation.
In addition, the height of described lug boss 30b (being 0.7mm in the present embodiment) is greater than the thickness (being 0.4mm in the present embodiment) of described annular metal sheet 23, the structure (being 0.3mm the present embodiment) that the front end of described lug boss 30b protrudes from described through hole 23a, therefore, after described main part 1 is arranged, form gap S between the planar portions 29a of described cylindrical metal container 29 and the described annular metal sheet 23, the heat of main part 1 is not easy to pass to described permanent magnet 30.Thereby, have and suppress because the effect of the magnetic flux density reduction of the described permanent magnet 30 that the rising of temperature causes.
Also have, described bonding agent 24 injects from described through hole 23a, and therefore, the described through hole 23a that forms as the location can be used in the inlet of described bonding agent 24, and the effect of the coating operation that improves described bonding agent 24 is arranged.
To have formed described through hole 23a in order cooperating in the present embodiment, also can but form recess with described lug boss 30b.And after described bonding agent 24 is infused in recess, described lug boss 30b and recess are cooperated, come firm fixing described annular metal sheet 23.Therefore, even in assembling magnetron operation, be subjected to vibration, impact, can prevent effectively that described annular metal sheet 23 from producing skew from given position, simultaneously, recess as location formation, can be used in the inlet of described bonding agent 24, the effect of the coating operation that improves described bonding agent 24 is arranged.
According to the present invention 1, magnetron comprises a pair of annular poles sheet of the above and below that is arranged in this canister, be arranged in the annular metal sheet between this annular poles sheet and the cylindrical metal container, the negative electrode of described anodes centre axial region configuration filament, and be provided with described annular metal sheet is fixed on fixture in described annular poles sheet or the described cylindrical metal container one at least, therefore, even in finishing magnetron assembling operation, vibrated, impact, can not produce of the skew of described annular metal sheet from given position, can concentrate on the magnetic flux of described annular poles sheet effectively near the described negative electrode, can obtain the effect that prevents that magnetic circuit efficient from reducing.
According to the present invention 2, described fixture is at described annular metal sheet the adhesive applicating of evaporation below 200 ℃, so, simple method is fixed on described annular poles sheet or described cylindrical metal container to described annular metal sheet, therefore, even in finishing magnetron assembling operation, vibrated, impact, can not produce of the skew of described annular metal sheet from given position, simultaneously, finish the inspection operation that the assembling magnetron carries out later on, for example, confirm in the inspection operation of oscillatory work, the evaporation of described bonding agent, described bonding agent is not residual when being installed in microwave oven, and the evaporant that described bonding agent can not take place enters in the storehouse problem that occurs attached to food on the health.(described effect is arranged)
According to the present invention 3, described fixture is to form lug boss and form through hole on described cylindrical metal container on described annular metal sheet, cooperate described lug boss and described through hole, therefore, described through hole becomes location hole, can be fixed on given position to described annular metal sheet, therefore, even in finishing magnetron assembling operation, be subjected to vibration, impact, can prevent effectively that described annular metal sheet from producing the effect of skew from given position.
According to the present invention 4, described fixture is to form lug boss and form through hole on described annular poles sheet on described annular metal sheet, cooperate described lug boss and described through hole, therefore, described through hole becomes location hole, between described cylindrical metal container and described annular poles sheet, fix described annular metal sheet to given position, therefore, even in finishing magnetron assembling operation, be subjected to vibration, impact, can prevent effectively that described annular metal sheet from producing the effect of skew from given position.
According to the present invention 5, the height of described lug boss is greater than the thickness of described annular metal sheet, so, even described lug boss and described through hole cooperate, the front end of described lug boss protrudes from described through hole, form the gap between described annular poles sheet and the described annular metal sheet or between described cylindrical metal container and the described annular metal sheet, therefore, the heat of magnetron main body is not easy to pass to described annular poles sheet, has can suppress because the rising of temperature causes the effect of reduction of the magnetic flux density of described annular poles sheet.
According to the present invention 6, described bonding agent is to inject from described through hole, by the firm fixing described annular metal sheet of described bonding agent, therefore, even in finishing magnetron assembling operation, be subjected to vibration, impact, can prevent effectively that described annular metal sheet from producing skew from given position, simultaneously, the described through hole that forms as the location is used in the inlet of described bonding agent, and the effect of the coating operation that improves described bonding agent is arranged.
According to the present invention 7, the number of described lug boss and described through hole is more than at least two, therefore, the location of described annular metal sheet is simple, has to improve the effect that described annular metal sheet is arranged in the operation of given position.
According to the present invention 8, described fixture is to form lug boss and form recess on described cylindrical metal container on described annular metal sheet, cooperate described lug boss and described recess, described recess becomes the location, can be fixed on given position to described annular metal sheet, therefore, even in assembling magnetron operation, be subjected to vibration, impact, can prevent effectively that described annular metal sheet from producing the effect of skew from given position.
According to the present invention 9, described fixture is to form lug boss and form recess on described annular poles sheet on described annular metal sheet, cooperate described lug boss and described recess, described recess becomes the location, between described cylindrical metal container and described annular poles sheet, can be fixed on given position to described annular metal sheet, therefore, even in assembling magnetron operation, be subjected to vibration, impact, can prevent effectively that described annular metal sheet from producing skew from given position.
According to the present invention 10, described bonding agent is to inject from described recess, by the firm fixing described annular metal sheet of described bonding agent, therefore, even in finishing magnetron assembling operation, be subjected to vibration, impact, can prevent effectively that described annular metal sheet from producing skew from given position, simultaneously, the described recess that forms as the location is used in the inlet of described bonding agent, the coating operation that effectively improves described bonding agent.
According to the present invention 11, the number of described lug boss and described recess has at least more than two, therefore, the location of described annular metal sheet is simple, effectively improves the operation that described annular metal sheet is arranged in given position.
Claims (11)
1, a kind of magnetron is included in the sealed at both ends joint of anode, constitute the part of vacuum tank the cylindrical metal container, be arranged in the above and below of this canister pair of permanent magnets, be arranged in annular metal sheet between this permanent magnet and the cylindrical metal container, dispose the negative electrode of filament at described anodes centre axial region, it is characterized in that: be provided with described annular metal sheet is fixed on fixture in described permanent magnet or the described cylindrical metal container one at least.
2, magnetron according to claim 1 is characterized in that: described fixture be below 200 ℃ the evaporation adhesive applicating on described annular metal sheet.
3, magnetron according to claim 1 is characterized in that: described fixture forms lug boss at described cylindrical metal container, forms through hole on described annular metal sheet, and cooperates described lug boss and described through hole.
4, magnetron according to claim 1 is characterized in that: described fixing means forms lug boss on described permanent magnet, forms through hole at described annular metal sheet, cooperates described lug boss and described through hole.
5, according to claim 3 or 4 described magnetrons, it is characterized in that: the height of described lug boss is greater than the thickness of described annular metal sheet.
6, according to claim 3 or 4 described magnetrons, it is characterized in that: described bonding agent is to inject from described through hole.
7, according to claim 3 or 4 described magnetrons, it is characterized in that: the number of described lug boss and described through hole has at least more than two.
8, magnetron according to claim 1 is characterized in that: described fixture forms lug boss at described cylindrical metal container, forms recess at described annular metal sheet, cooperates described lug boss and described recess.
9, magnetron according to claim 1 is characterized in that: described fixture forms lug boss on described permanent magnet, forms recess on described annular metal sheet, cooperates described lug boss and described recess.
10, according to Claim 8 or 9 described magnetrons, it is characterized in that: described bonding agent injects from described recess.
11, according to Claim 8 or 9 described magnetrons, it is characterized in that: the number of described lug boss and recess is more than at least two.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001290399A JP2003100225A (en) | 2001-09-25 | 2001-09-25 | Magnetron |
| JP2001-290399 | 2001-09-25 | ||
| JP2001290399 | 2001-09-25 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1411019A CN1411019A (en) | 2003-04-16 |
| CN1196164C true CN1196164C (en) | 2005-04-06 |
Family
ID=19112709
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021418829A Expired - Fee Related CN1196164C (en) | 2001-09-25 | 2002-08-27 | Magnetron |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP2003100225A (en) |
| KR (1) | KR100490606B1 (en) |
| CN (1) | CN1196164C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100376013C (en) * | 2003-06-30 | 2008-03-19 | 乐金电子(天津)电器有限公司 | A-packaging brazing structure for magnetron |
| JP6171162B2 (en) * | 2011-12-06 | 2017-08-02 | パナソニックＩｐマネジメント株式会社 | Microwave equipment |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR930008342Y1 (en) * | 1991-07-03 | 1993-12-20 | 주식회사 금성사 | Magnetron choke apparatus |
| KR0121881Y1 (en) * | 1992-05-11 | 1998-07-15 | 구자홍 | Filament supporting structure of magnetron |
| KR19980013847U (en) * | 1996-08-31 | 1998-06-05 | 구자홍 | Microwave Magnetron |
| KR100266604B1 (en) * | 1998-02-10 | 2000-09-15 | 구자홍 | Structure for preventing harmonic wave leakage in magnetron |
| KR20000003407U (en) * | 1998-07-23 | 2000-02-15 | 윤종용 | magnetron |
-
2001
- 2001-09-25 JP JP2001290399A patent/JP2003100225A/en active Pending
-
2002
- 2002-08-27 CN CNB021418829A patent/CN1196164C/en not_active Expired - Fee Related
- 2002-09-17 KR KR10-2002-0056523A patent/KR100490606B1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| JP2003100225A (en) | 2003-04-04 |
| CN1411019A (en) | 2003-04-16 |
| KR20030026858A (en) | 2003-04-03 |
| KR100490606B1 (en) | 2005-05-19 |
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