CN1215503C - Variable capacitor and method for mfg. metallic rotator of same - Google Patents
Variable capacitor and method for mfg. metallic rotator of same Download PDFInfo
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- CN1215503C CN1215503C CNB011043547A CN01104354A CN1215503C CN 1215503 C CN1215503 C CN 1215503C CN B011043547 A CNB011043547 A CN B011043547A CN 01104354 A CN01104354 A CN 01104354A CN 1215503 C CN1215503 C CN 1215503C
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- metallic
- section portion
- rotator
- metallic rotator
- protuberance
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B5/00—Non-insulated conductors or conductive bodies characterised by their form
- H01B5/06—Single tubes
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Abstract
To prevent a warpage from being generated on a metal rotor for a variable capacitor and to prevent a step from being generated between a step part, to give a rotor electrode and a projected part for inclination prevention, when the metal rotor is manufactured by processing a metal plate obtained through a rolling process through etching. When a step part 13 to give a rotor electrode 14 and a projected part 15 for inclination prevention, having a height equal to that of this step part 13, are formed by processing a metal plate through etching, the rolling direction of the metal plate is set, so that the direction is turned in the direction to substantially intersect orthogonally the arranging direction of the step part 13 and the projected part 15.
Description
Technical field
The present invention relates to variable capacitor and variable capacitor with the manufacture method of metallic rotator, particularly relate to the variable capacitor that has by the rolled metal plate being carried out the metallic rotator that the etching and processing manufacturing forms and the manufacture method of metallic rotator.
Background technology
Fig. 5 represents the cutaway view of an example of the variable capacitor that the present invention merits attention.
This variable capacitor 1 as shown in the figure is for being installed in the form on surface, and its major part comprises stator 2, metallic rotator 3, metal cap 4 and spring washer 5.
Below on interarea 11 sides, as shown in Figure 7, form the rotor electrode 14 on section portion 13 surfaces with about semicircle shape ledge.In addition, below be formed with the protuberance that prevents from usefulness 15 with section portion 13 equal heights on interarea 11 sides, the effect of section portion 13 is to prevent metallic rotator 3 formation inclinations.The above-mentioned section portion 13 and the concrete configuration of protuberance 15 are, be divided into 2 of the 1st and the 2nd semicircle shape when regional at interarea below the handle 11 by the line of demarcation of extending to diametric(al), section portion 13 is arranged in the 1st semicircle shape zone, and protuberance 15 is arranged in the 2nd semicircle shape zone and is positioned on the position with the line of demarcation square crossing.
In addition, on interarea 10 sides above the metallic rotator 3, as shown in Figure 6, be formed with screwdriver slot 16.
Above-mentioned metallic rotator 3 is by rotatably being accommodated at metal cap 4.Like this, metal cap 4 has can accommodate metallic rotator 3 and can drive the shape of its rotation, though do not express in the drawings, is actually by its part is entrenched on the stator 2, and itself and stator are fixed.
On metal cap 4,, be formed with the opening 17 of adjusting usefulness for the screwdriver slot 16 that makes metallic rotator 3 exposes.Form cone shape slope slightly at this edge part of adjusting the opening 17 of usefulness, press to metallic rotator 3, play a part spring.
In addition, 4 li of metal caps, be provided with the terminal 18 of the bottom of the peripheral part 12 that extends to stator 2.Also this terminal 18 of handlebar forms the form of welding with a side's of stator 2 terminal 9.
Therefore, the adjustment by metal cap 4 is with the effect of the spring of the edge part of opening 17 and spring washer 5, and metallic rotator 3 is crushed on the stator 2, forms the closely knit contact condition of stablizing of metallic rotator 3 and stator 2.
For the variable capacitor 1 with such formation, rotor electrode 14 passes through the capacitor dielectric of the part of stator 2, thereby forms opposed acquisition static capacity with stator electrode 6.And by rotating metallic rotor 3, rotor electrode 14 and effective subtend area of stator electrode 6 are changed, static capacity is adjusted thereupon thus.This static capacity is removed forming between the terminal 18 in terminal 8 that is electrically connected and the metal cap 4 that electrically contacts by 5 formation of the spring washer in the metallic rotator 3 of formation rotor electrode 14 with stator electrode 6.
Above-mentioned metallic rotator 3 forms by cold rolling or casting manufacturing usually.But cold rolling or casting must have the mould of metallic rotator 3 special uses, and therefore, first current cost is high and in the process of processing, and is bigger to the duty ratio of mould, makes the lost of life of mould, increased processing cost.
In addition, the rotor electrode 14 of the metallic rotator 3 of just cold rolling or casting, roughness and waviness that it is surperficial are relatively large.In order to increase the stability of static capacity, must reduce such roughness and waviness.Therefore, by metallic rotator 3 cold rolling or that casting forms, usually must be through attrition process.This grinding step has increased cost again.
Under such background, in order to solve the above problems, the spy opens flat 9-190951 communique and has proposed not just can to produce the cheapness and the method for variable capacitor usefulness metallic rotator efficiently by cold rolling or casting.
The basic principle of the manufacture method of the metallic rotator that this communique proposed is to utilize etching technique to make metallic rotator, in the occasion of shop drawings 5 to metallic rotator shown in Figure 7, at first be ready to metallic plate, use the etching etchant resist that metallic plate is carried out selectable etching, by this method, form the section portion 13 of rotor electrode and prevent from usefulness protuberance 15 and screwdriver slot 16 and outer peripheral face 12.
In the occasion that makes in this way, though metallic plate is through rolling forming, but by the processing of its surface being ground etc., reduce the roughness on surface, owing in etched process, can remain this level and smooth surface, can directly be used as rotor electrode 14 so the metallic rotator that is processed into has level and smooth surface.
But the above-mentioned metallic rotator 3 that utilizes etching technique to be processed into bends sometimes, and it is poor that its result makes rotor electrode 14 and prevents to form section between the usefulness end face of protuberance 15.And in the middle of a plurality of metallic rotators 3, so crooked or section extent of each metallic rotator 3 is all inconsistent.
When forming the section difference between the end face of rotor electrode 14 and protuberance 15, form unsettled contact condition with stator 2 like this, therefore, form the torque of unsettled rotating metallic rotor 3, the result causes the tuning instability of variable capacitor 1.
Summary of the invention
Therefore, the objective of the invention is to solve, the manufacture method of a kind of variable capacitor with metallic rotator and the variable capacitor with metallic rotator that manufacturing by this method forms are provided because of above-mentioned crooked or problem that the section difference causes.
Inventor of the present invention has carried out various experiments in order to verify the reason of metallic rotator bending, and experimental result shows that crooked formation is relevant with the rolling direction of the metallic plate of making metallic rotator.That is, for through the rolling metallic plate that forms for the section portion that forms rotor electrode with prevent that inclination from using protuberance, carry out partially-etched after, the thickness generation localized variation of metallic plate, the result changes the distribution of the internal residual stresses of metallic plate.And, observe the rolling direction that is subjected to employed metallic plate and the influence by the relation between the part of etching and processing varied in thickness, the metallic rotator that is processed into has also having of bending not bend, and inspired by this, has constituted the present invention.
The present invention at first provides a kind of variable capacitor, has metallic rotator, opposed by capacitor dielectric and stator electrode in described metallic rotator one side's interarea side by the rotor electrode that the surface of the outstanding section portion of a part forms, by the rotating metallic rotor, change the effective opposed area of described rotor electrode and described stator electrode, thereby adjustment static capacity, it is characterized in that, described metallic rotator is made by the rolled metal plate is carried out etch processes, interarea side described metallic rotator one side, described section portion and have with described section portion's double altitudes prevent crookedly use protuberance, be arranged on the direction with the rolling direction square crossing of described metallic plate.
For such variable capacitor, metallic rotator is to form carrying out etching and processing through the metallic plate of rolling process, on metallic rotator one side's interarea side, be disposed with above-mentioned section portion and have with this section portion double altitudes prevent the bending protuberance.So, in order to solve above-mentioned technical problem, the orientation of this section portion and protuberance is arranged on the direction with the square crossing of the rolling direction of above-mentioned metallic plate.
Among the more special embodiment as above-mentioned variable capacitor, the interarea of metallic rotator is circular, when be divided into the 1st and during the 2 two semicircle shape zone by the line of demarcation of extending in diametric(al), section portion is arranged in above-mentioned the 1st semicircle shape zone, prevent that the protuberance that tilts is arranged in the zone of the 2nd semicircle shape, and be positioned on the diameter with above-mentioned boundary square crossing.
This invention and on a side interarea side, in order to form rotor electrode from the teeth outwards, arrange be provided with section portion with ledge and have with section portion double altitudes prevent to tilt to use the variable capacitance of the protuberance manufacture method of metallic rotator.
According to a further aspect in the invention, the manufacture method of a kind of variable capacitor with metallic rotator is provided, for on a side interarea side, in order to form rotor electrode from the teeth outwards, section portion with ledge arrange to be set and have with described section portion's double altitudes prevent the inclination protuberance, it is characterized in that, comprising: prepare the rolled metal plate the fourth preface, described metallic plate is carried out etch processes, form described section portion and the described formation operation that prevents curved protrusion; In the operation of described section portion and the described protuberance that prevents crooked usefulness, described section portion with describedly prevent that crooked orientation with protuberance is set on the direction with the rolling direction square crossing of metallic plate.
The variable capacitor of this invention with the better mode of the manufacture method of metallic rotator is, metallic plate is being carried out etching and processing forms section portion and when preventing to tilt to use protuberance, section portion is being arranged to direction with the rolling direction square crossing of metallic plate with preventing from the orientation of protuberance.
Description of drawings
Below accompanying drawing is done simple declaration.
Fig. 1 is the view of below interarea 11 sides of the metallic rotator that variable capacitor had 3 of an embodiment of this invention of expression.
Fig. 2 is the cutaway view of the operation that manufacture method comprised of the metallic rotator 3 shown in the sequence list diagrammatic sketch 1.
Fig. 3 is equivalent to Fig. 1, the view of below interarea 11 sides of expression metallic rotator 3 as a comparative example.
Fig. 4 is the view of expression to below interarea 11 sides of the metallic rotator 3a that variable capacitor had of other embodiment of the present invention.
Fig. 5 is the cutaway view of expression variable capacitor 1 that the present invention is merited attention.
Fig. 6 is the stereogram that the metallic rotator 3 that variable capacitor shown in Figure 51 is had is represented from top interarea 10 sides separately.
Fig. 7 is the stereogram of below interarea 11 sides of expression metallic rotator 3 shown in Figure 6.
In above-mentioned accompanying drawing, 1-variable capacitor, 2-stator, 3,3a-metallic rotator, 6, the 7-stator electrode, 10,22-top main and, 11,23-transfers interarea, 13-section portion, 14-rotor electrode, 15-prevent to tilt and use protuberance, 19-rolling direction, 21-metallic plate, 24, the 25-etchant resist.
Embodiment
Below, contact describes embodiments of the invention with reference to the variable capacitor 1 that above-mentioned Fig. 5 to Fig. 7 describes.So, in the following description, except that special item, in the explanation of the embodiment of the invention, can continue to use above-mentioned explanation.
Fig. 1 is the explanation legend of metallic rotator 3 of an embodiment of this invention, and presentation graphs 5 is to below interarea 11 sides of metallic rotator shown in Figure 73.
As shown in Figure 1, on interarea 11 sides below the metallic rotator 3, as mentioned above, be provided with the section portion 13 that forms rotor electrode 14 and prevent to tilt to use protuberance 15.In more detail, below interarea 11 is circular, interarea 11 is divided into the 1st and during the 2 two semicircle shape zone by the line of demarcation of extending in diametric(al) below this, section portion 13 is arranged on the 1st semicircle shape zone, prevent to tilt with protuberance 15 in the 2nd semicircle shape zone, and be positioned on the diameter with the line of demarcation square crossing.
As shown in Figure 1, interarea 11 sides are arranged the section of setting portion 13 and the occasion that prevents from protuberance 15 below metallic rotator 3, select the direction of this orientation for the square crossing of the rolling direction 19 of the metallic plate of manufacturing metallic rotator 3.
Describe with reference to Fig. 2 about the manufacture method of making such metallic rotator 3.Fig. 2 represents the cutaway view of the operation that the manufacture method of metallic rotator 3 is included in proper order.
At first shown in Fig. 2 (1), be ready to metallic plate 21.This metallic plate 21 has passed through rolling process or calendering and grinding step, forms top interarea 22 and below interarea 23.Particularly below interarea 23 will form as rotor electrode 14 necessary even surfaces.And configuration metallic plate 21 makes the rolling direction 19 of the metallic plate 21 that forms through the rolling process direction with the paper square crossing in Fig. 2.
Then, shown in Fig. 2 (1), interarea 22 above the metallic plate 21 and below form the 1st etchant resist 24 respectively on the interarea 23.The figure of this 1st etchant resist is, up on interarea 22 sides, the part of screwdriver slot 16 of exposing the top interarea 10 of metallic rotator 3, below on interarea 23 sides, expose the section portion 13 on the below interarea 11 of metallic rotator 3 and prevent from the part beyond the protuberance 15.
Then, shown in Fig. 2 (2), etch partially.Like this, screwdriver slot 16 is formed on top interarea 22 sides, section portion 3 and prevent to be formed on protuberance 15 below interarea 23 sides.The degree of depth that etches partially of top interarea 22 sides and the degree of depth that etches partially of below interarea 23 sides can for example be set respectively by adjusting etching liquid measure and etching period.
Then, shown in Fig. 2 (3), remove the 1st etchant resist 24.
Then, shown in Fig. 2 (4), interarea 22 above the metallic plate 21 and below form the 2nd etchant resist 25 on each face of interarea 23.The formation image of this 2nd etchant resist 25, be equivalent to interarea 10 above the metallic rotator 3 that will obtain and below each face of interarea 11 form flat shape, i.e. toroidal.
Then, shown in Fig. 2 (5),, the part beyond the part in the middle of being clipped in by the 2nd etchant resist 25 is removed by carrying out etching.Through after the current etch processes, formed the outer peripheral face 12 of metallic rotator 3.Arrive this, finished the forming processes of metallic rotator 3.
Then, shown in Fig. 2 (6), remove the 2nd etchant resist.
By such processing, obtained desired metallic rotator 3.Because the rolling direction 19 of the metallic plate 21 here is set to the direction with the paper square crossing of Fig. 2, so, should note the section of making portion 13 and prevent from that orientation with protuberance 15 is set in the direction with rolling direction 19 square crossings of this metallic plate 21.
In addition, the rotor electrode 14 on surface that it should be noted that the formed section of having portion 13 is owing to covered by the 1st or the 2nd etchant resist 24 or 25 in the process of etch processes, so the below interarea 23 of metallic plate 21 can keep the flatness that had originally.In addition, if the metallic plate of being prepared 21 does not possess very level and smooth surface, for example can after the operation shown in Fig. 2 (3), carry out the flatness grinding of necessity to the rotor electrode 14 of metallic rotator 3.
More than, flexibility for the metallic rotator 3 of confirming this embodiment, utilize thickness to be about the metallic plate 21 of 0.2-0.4mm scope, make the metallic rotator 3 that diameter is about the 2-3mm scope, the rotor electrode 14 on the surface of its section portion 13 and prevent to become 0 μ m with the section difference between the end face of protuberance 15.
In contrast, make metallic rotator 3 if use the same size of same metallic plate 21 usefulness, as shown in Figure 3, in section portion 13 with the orientation occasion consistent of preventing to tilt with rolling direction with protuberance 15, the rotor electrode 14 on the surface of its section portion 13 and prevent to have occurred between the end face with protuberance 15 the section poor of 0.5～2.0 mu m range.
More than by illustrated embodiment this invention is illustrated, other various variation can be arranged in this scope of invention.
For example, only etch processes order one example to reference Fig. 2 is illustrated, and can change it.
In addition, the manufacture method of metallic rotator 3 shown in Figure 2 is the outer peripheral faces 12 that form metallic rotator 3 by etch processes, also can for example use cutting method to form this outer peripheral face.
In addition, be not limited to the shape shown in the figure, form the section portion of rotor electrode and prevent that inclination from using protuberance, also can form other shape as long as possessed for the shape of the metallic rotator of making by the manufacture method of this invention.For example, form shape shown in Figure 4.Promptly; In metallic rotator 3a shown in Figure 4, form the screwdriver slot 16a that connects.Because other formation is identical with metallic rotator 3 shown in Figure 1, thus identical reference marks used for the part of correspondence, and the repetitive description thereof will be omitted.
In addition, the manufacture method of Fa Ming metallic rotator hereto, it would be desirable, metallic plate is being carried out etch processes, when forming section portion and preventing that inclination from using protuberance, the section of making portion and the orientation that prevents from the usefulness protuberance and the rolling direction square crossing of metallic plate, but only GPRS the relation between these orientations and the rolling direction, even bending has taken place, owing to can make its case of bending essence identical, so, help preventing the quality disunity between the product.
As mentioned above, variable capacitor according to this invention is, manufacturing forms metallic rotator wherein through etch processes by the rolled metal plate, on side's interarea side of this metallic rotator, form rotor electrode section portion and with this section portion equal height prevent from be arranged on direction with the rolling direction square crossing of metallic plate with the protuberance arrangement, therefore, even because of etch processes, the local thickness of metallic plate changes, the distribution of the internal stress of metallic plate is changed, be not easy to form crooked, the section of formation is not poor with preventing from end face with protuberance for the rotor electrode on surface that can the section of making portion yet.
Thereby, make metallic rotator and capacitor dielectric form stable contact condition, can keep the tuning stability of variable capacitor, and can make the torque of rotating metallic rotor stable.
In addition, use the manufacture method of metallic rotator according to the variable capacitor of this invention, when metallic plate being carried out etch processes formation section portion and preventing to tilt to use protuberance, since section portion with prevent from that orientation with protuberance is defined as the rolling direction direction at an angle with metallic plate, so between the metallic rotator of making in a large number even bending has taken place, also can keep this crooked state consistency, help in the manufacture process of variable capacitor quality management metallic rotator.
The manufacture method of Fa Ming metallic rotator hereto is if section portion and prevent from that orientation with protuberance is set to the direction with the rolling direction square crossing of metallic plate then is difficult to bend in made metallic rotator.
Claims (3)
1, a kind of variable capacitor, has metallic rotator, opposed by capacitor dielectric and stator electrode in described metallic rotator one side's interarea side by the rotor electrode that the surface of the outstanding section portion of a part forms, by the rotating metallic rotor, change the effective opposed area of described rotor electrode and described stator electrode, thereby adjustment static capacity, it is characterized in that, described metallic rotator is made by the rolled metal plate is carried out etch processes, interarea side described metallic rotator one side, described section portion and have with described section portion's double altitudes prevent crookedly use protuberance, be arranged on the direction with the rolling direction square crossing of described metallic plate.
2, the described variable capacitor of claim 1, the interarea of described metallic rotator is circular, when be divided into the 1st and during the 2 two semicircle shape zone by the line of demarcation of extending in diametric(al), described section portion is arranged in described the 1st semicircle shape zone, described protuberance is arranged in the zone of described the 2nd semicircle shape, and is positioned on the diameter with the square crossing of above-mentioned line of demarcation.
3, a kind of variable capacitor manufacture method of metallic rotator, for on metallic rotator one side's interarea side, in order to form rotor electrode from the teeth outwards, section portion with ledge arrange to be set and have with described section portion's double altitudes prevent the bending protuberance, it is characterized in that, comprise: prepare the rolled metal plate operation, described metallic plate is carried out etch processes, form described section portion and the described formation operation that prevents curved protrusion; Form described section portion and described prevent crooked with in the operation of protuberance, described section portion with describedly prevent that bending is set on the direction with the rolling direction square crossing of metallic plate with the orientation of protuberance.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000051381A JP2001244142A (en) | 2000-02-28 | 2000-02-28 | Variable capacitor and manufacturing method of metal rotor for variable capacitor |
| JP051381/2000 | 2000-02-28 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1311514A CN1311514A (en) | 2001-09-05 |
| CN1215503C true CN1215503C (en) | 2005-08-17 |
Family
ID=18573040
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011043547A Expired - Fee Related CN1215503C (en) | 2000-02-28 | 2001-02-28 | Variable capacitor and method for mfg. metallic rotator of same |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP2001244142A (en) |
| KR (1) | KR100396181B1 (en) |
| CN (1) | CN1215503C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006210843A (en) * | 2005-01-31 | 2006-08-10 | Fujitsu Ltd | Variable capacitor and manufacturing method thereof |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56118326A (en) * | 1980-02-21 | 1981-09-17 | Matsushita Electric Ind Co Ltd | Method of manufacturing variable porcelain condenser |
| JPH08213279A (en) * | 1995-02-01 | 1996-08-20 | Murata Mfg Co Ltd | Manufacture of rotor for variable capacitor |
| JP3060929B2 (en) * | 1996-01-11 | 2000-07-10 | 株式会社村田製作所 | Method of manufacturing metal rotor for trimmer capacitor |
| JPH09275035A (en) * | 1996-04-05 | 1997-10-21 | Murata Mfg Co Ltd | Metal rotor, variable capacitor using it and manufacture of variable capacitor |
-
2000
- 2000-02-28 JP JP2000051381A patent/JP2001244142A/en active Pending
-
2001
- 2001-02-27 KR KR10-2001-0009971A patent/KR100396181B1/en not_active IP Right Cessation
- 2001-02-28 CN CNB011043547A patent/CN1215503C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1311514A (en) | 2001-09-05 |
| JP2001244142A (en) | 2001-09-07 |
| KR20010085660A (en) | 2001-09-07 |
| KR100396181B1 (en) | 2003-08-27 |
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Granted publication date: 20050817 Termination date: 20100228 |