CN1033901A

CN1033901A - Variable film capacitor with deformable rotor

Info

Publication number: CN1033901A
Application number: CN 87101215
Authority: CN
Inventors: 杨军
Original assignee: Individual
Current assignee: Individual
Priority date: 1987-12-29
Filing date: 1987-12-29
Publication date: 1989-07-12

Abstract

The invention provides the principle and the structure of making variable capacitor of deformable moving plate.Moving plate and still are close to dielectric film, and the centre does not have air layer.The variation of capacitance is leaned on the part of moving plate to be set off and is realized.Can form multiple variable capacitor with plural still with a moving plate, a plurality of moving plates and still that an also available insulating carrier drives are formed multiple variable capacitor.Six different embodiment are provided in the patent specification, that the variable capacitor that the principle that adopts deformable rotor and structure fabrication be described has is simple in structure, cost is low, precision is high, noise is little, rotor can rotate on a large scale, and moving plate needn't advantage such as draw through sliding contacting mode.

Description

Variable film capacitor with deformable rotor

The invention belongs to the variable capacitor technical field.Specifically, the present invention proposes in order to design and to make the new principle and the structure of simply connected, duplex, multi-joint and various dedicated variable capacitors.

The principle and the structure of known variable film capacitor are: drive one or more moving plate groups by rotor.The sheet moving plate that one or more given shapes are all arranged in each moving plate group.Their thickness is accurately and with accurate equidistant keeping parallelism.

One or more still groups are housed on the support.The sheet still that one or more given shapes are all arranged in each still group.Their thickness is accurately and with accurate equidistant keeping parallelism.Moving plate and still keeping parallelism all have insulation film and air layer between each moving plate and each still.Rotary rotor, moving plate and still just overlap under the isolation of insulation film, and the variation of overlapping area causes the variation of capacitance.

Recent decades, the variable capacitor technology is to develop scrupulously abiding by under the prerequisite of above-mentioned theory structure.The Laminate(lamination that the mid-80 occurs) technology also just closely is fitted in the one-sided of moving plate and still to the insulation film that is clipped in discretely between the sound sheet, makes and has only an one deck insulation film and a layer of air between moving plate and the still.For fear of friction, it is indispensable that air layer remains.

Part sums such as moving plate, still, pad and film usually are dozens ofs even above 100 in the multiple capacitor.Part is many, and is tiny, and accuracy is very high, makes the production in enormous quantities variable capacitor become an also bigger industrial technology of the bigger investment of difficulty.

The present invention is intended to replace known theory structure with new theory structure, with lower one-tenth the design and the high performance variable capacitor of manufacturing.

New theory structure shows: moving plate can be out of shape, and changes capacitance by distortion.Moving plate is fitted through insulation film medium and still to greatest extent during heap(ed) capacity.When moving plate is started gradually by the part, capacity just reduces gradually, otherwise then capacity increases gradually.

Embodiment of the present invention can be further be illustrated to accompanying drawing 6 embodiment such as grade by accompanying drawing 1:

Embodiment 1, sees accompanying drawing 1:

The inner chamber of cup-shaped insulation framework is a hollow garden post, and inwall upper edge garden Zhou Fangxiang posts one section tinsel (or exposing the metal surface that is bumped into skeleton), and lead-out wire causes contact, and using is the still of variable capacitor.The still loam cake is with the uniform very thin insulation film of thickness.

Metal or nonmetallic garden cylindrical coaxial rotor are housed in the skeleton.

Make band shape moving plate with the elastomeric material that has the metal surface.The one end is fixed near the insulation framework of still starting point, causes contact with lead-out wire.It is the capacitor of medium with the insulation film only with still formation that moving plate can paste clothes ground along garden Zhou Fangxiang, and moving plate is done once bent returning between skeleton and rotor, and the other end smoothly is fixed on the rotor.

The arc length that rotary rotor, moving plate are affixed on insulation film and still formation electric capacity will change, thereby cause the variation of area coverage and the variation of capacitance.

Concern just like lower linear between the variable quantity of covering arc length and the variable quantity of angle of rotor:

△L＝ (πRr)/(180°（R+r）) ·△α

Wherein △ L-moving plate covers the variable quantity of arc length to still.

The radius of circle that R-is made of the insulation film surface.

The r-rotor radius.

The variable quantity of △ α-rotor angle.

The dielectric that spreads on the still surface changed spread on moving plate and still belong to present embodiment.

Embodiment 2, see accompanying drawing 2:

Still, dielectric and moving plate to the coverage mode of still with embodiment 1 and accompanying drawing 1, but following feature is arranged: an end of moving plate is not fixed on the rotor, but paste bent the returning that try again behind the clothes with rotor, again in no still position and inboard wall of skeleton applying, and be fixed on the skeleton.Rotor frictionally or make deformable rotor by the aperture on the moving plate by self protrusion.It is the moment balance that makes rotor that moving plate is done twice bent effect of returning.

Embodiment 3, see accompanying drawing 3:

Internal structure is with embodiment 2 and accompanying drawing 2, but following feature is arranged: skeleton be thickness evenly and very thin core insulator, the corresponding metallic film that posts with the still conducting in the outside of cup with the movable position of moving plate.Its effect is to proofread and correct the volume change curve.

Embodiment 4, see accompanying drawing 4:

Skeleton, still and insulation film are all made by embodiment 1, it is characterized in that moving plate is wound on the planetary roller.

Embodiment 5, see accompanying drawing 5:

The corresponding relation of moving plate and still among the maintenance embodiment 1～4, but skeleton changes flat board or bent plate into, and rotor changes slide plate into.

Embodiment 6, see accompanying drawing 6:

Moving plate is that the flexible sheet bending by an annular forms.Crooked cyclic spring diaphragm is sandwiched between the fixed underpan and movable disk that is parallel to each other, and forms the circular arc binding face with the two.The center of arc of two binding faces and the axis coinciding of movable disk.Be covered with still and lid on the chassis with insulation film.Fricton-tight between rotating disk, chassis and the moving plate.When movable disk rotated, the corresponding position between moving plate and the still changed, thereby changed capacitance therebetween.

Variable film capacitor with deformable rotor has following advantage:

1. simple in structure, cost is low;

2. precision height;

3. do not have air dielectric, do not have friction, noise is low;

4. in a skeleton one, two or more moving plate can be installed.Each moving plate all can be coupled with a plurality of stills arranged side by side, is easy to manufacture multiple variable capacitor;

5. the lead-out wire of moving plate can directly be drawn with motionless conductor, needn't pass through sliding contacting mode;

6. select less rotor radius for use, the slewing area of rotor can exceed 180 °, even exceeds 360 °, can realize trickle tuning.

Claims

1, variable capacitor of forming by skeleton, still, insulation film, moving plate and manual part, be to be characterised in that: moving plate can exceed planar range at geometric distortion, manually part drive moving plate is out of shape gradually by the part, change the corresponding area of moving plate and still, thus the capacitance between change moving plate and the still.

2, according to the variable capacitor of claim 1, it is characterized in that: deformable moving plate is the elastic conduction thin slice, and is corresponding with one or more stills arranged side by side, forms simply connected, duplex or multiple variable capacitor.

3, according to the variable capacitor of claim 1, it is characterized in that: deformable moving plate is that one or more conduction laminatings mutually arranged side by side are obeyed on elastic insulated carrier, forms simply connected, duplex or multiple variable capacitor with still.

4, according to the variable capacitor of claim 1, it is characterized in that: deformable moving plate or its carrier space introversion between skeleton and manual part is returned.One end smoothly is affixed to insulation film, constitutes electric capacity with still, and end points is fixed on the skeleton; The other end smoothly is affixed to manual part, and end points is fixed on the manual part.Change the position of manual part, deformable rotor is affixed to the area generation localized variation of insulation film, causes the variation of capacitance.

5, according to the variable capacitor of claim 1, it is characterized in that: the two ends of deformable moving plate or its carrier all are fixed on the skeleton, one end can paste clothes along the direction and the skeleton of no still, and the other end can paste clothes along direction that still is arranged and insulation film, forms electric capacity.Clothes are pasted with manual part in the middle part under certain elastic pressure.Moving plate is each once bent returning in the both sides of manual part.Manually the contact-making surface of part and moving plate is fricton-tight, changes the position of manual part, deformable rotor, and the electric capacity between the sound sheet changes.

6, according to the variable capacitor of claim 1, it is characterized in that: an end of moving plate or its carrier is wound in a scroll wheel, and the rolling of scroll wheel causes deformable rotor, thereby causes the variation of capacitance.

7, according to the variable capacitor of claim 1, it is characterized in that: moving plate or its carrier are to pass through bending clamp between fixed underpan and movable disk by annular elastic sheet.

8, according to the variable capacitor of claim 1, it is characterized in that: insulation film pastes obeys on the still on the skeleton.

9, according to the variable capacitor of claim 1, it is characterized in that: insulation film pastes obeys on moving plate.