CN103943360B - Variable capacitor and production method thereof - Google Patents
Variable capacitor and production method thereof Download PDFInfo
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- CN103943360B CN103943360B CN201410184655.9A CN201410184655A CN103943360B CN 103943360 B CN103943360 B CN 103943360B CN 201410184655 A CN201410184655 A CN 201410184655A CN 103943360 B CN103943360 B CN 103943360B
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Abstract
The invention discloses a variable capacitor and a production method thereof. The variable capacitor comprises a soft upper diaphragm, a separator and a soft lower diaphragm which are sequentially stacked, dielectric with a high dielectric constant is arranged between the upper diaphragm and the lower diaphragm, an upper circuit is arranged on one side of the upper diaphragm opposite to the dielectric, the head end of the upper circuit corresponds to the size and the position of the dielectric, a lower circuit is arranged on one side of the lower diaphragm opposite to the dielectric, the head end of the lower circuit corresponds to the size and the position of the dielectric, and the separator is arranged on the side face or the edge of the upper surface of the dielectric, so that the dielectric is separated from the head end of the upper circuit. As the dielectric is arranged between the two circuits, capacitance is changed by changing stress, initial capacitance is zero and is changed under the action of external force, and the variable capacitor is simple in structure and production process and high in reliability.
Description
Technical field
The present invention relates to field of electrical components, more particularly, to a kind of variable condenser and its production method.
Background technology
The designing and manufacturing level of current electronic product improves continuous, and Consumer's Experience demand improves constantly, a lot
Under use occasion, need physical change amount to external world to make control and measurement and it needs to embody physical change amount, do
Go out corresponding response.It is exactly technology therein wherein for capacitance switch, pressure measxurement, it can all may be used in a lot of technical fields
To apply, such as the writing pencil used in various input equipments, hand-written dynamics can be reflected when hand-written, or reflection uses
Person, in the response using equipment, needs by hand-written dynamics in the regular hour, by relevant device and software during this time
This physical change amount is measured, is embodied by main equipment or display device, user's horse back perceives change, such as
Write weight, the thickness of word can be felt.
And the capacitance-type switch in miscellaneous equipment, this electric capacity initial value is zero or very little, is become after physical change
The electric capacity of certain capacitance, coordinates interlock circuit and capacitor resonance or by alternate manners such as capacitor triggers, so that circuit is responded, saves
Remove other types of key switch in circuit, such as writing pencil or click pen, and miscellaneous equipment input equipment and control device,
Can respond rapidly to when using control.
In order to reach object above and effect, current solution is: one block of dielectric has two end faces, and one end has two
Individual electrode, the other end has a flexible electrode, and there is certain gap flexible electrode and the electrodeless one end of dielectric, and are being subject to
To in the case of ambient pressure, flexible electrode can produce a relative variable quantity by end face electrodeless with dielectric, this
When change produces relatively, just obtain the parameter of ambient pressure change.
Above-mentioned technical scheme has clearly disadvantageous, is mainly manifested in: device complex manufacturing technology, and poor reliability is such as anti-
Water, dust-proof, be difficult to bear that larger pressure, pressure contact travel be big and device positioning precision is low, extraction electrode matching requirements are high, do not have
There is flexibility, poor reliability etc..
Content of the invention
The present invention proposes a kind of structure and simple production process, the high variable condenser of reliability and its production method.
For realizing above-mentioned design, the present invention employs the following technical solutions:
On the one hand adopt a kind of variable condenser, comprising: the soft upper strata diaphragm that stacks gradually, separator and soft
Lower floor's diaphragm, is provided with the dielectric of high dielectric constant between described upper strata diaphragm and lower floor's diaphragm；Described upper strata diaphragm and electricity
The relative side of medium is provided with upper strata circuit, and the head end of described upper strata circuit and dielectric size and location are correspondingly arranged；
The described lower floor diaphragm side relative with dielectric is provided with lower circuit, the head end of described lower circuit and dielectric size
It is correspondingly arranged with position；Described separator be arranged at described dielectric side or upper surface edge make described dielectric with
The head end of described upper strata circuit separates.
Wherein, also include: contact, described contact front end is soft spheroid, soft cone or soft tack；Described contact
Front end is arranged at the head end of described upper strata diaphragm, for external force is passed to upper strata diaphragm.
Wherein, also include: adhesive layer and substrate, described adhesive layer sticks at described lower floor diaphragm on described substrate.
Wherein, described substrate is stainless steel substrate, and described substrate is provided with draw-in groove or card column.
Wherein, described separator and described upper strata diaphragm and lower floor's diaphragm are correspondingly arranged；Offer logical on described separator
Hole, described dielectric is arranged in described through hole, described separator offers one end and is connected with described through hole, and the other end is arranged
Air slot in the side of separator.
Wherein, described separator is the multiple support feets being uniformly arranged in dielectric side or is sheathed on dielectric side
The support tube in face；The height of described support feet or support tube is slightly larger than described dielectric thickness.
Wherein, described separator is the many support feets being uniformly arranged at the edge of dielectric upper surface or is arranged at upper table
The one circle support ring at the edge in face.
Wherein, described upper strata circuit and lower circuit are elastomeric material circuit；Described upper electrode terminal and bottom electrode end
Son is flexible electrode terminal.
Wherein, described dielectric is resistance to stress dielectric, and described dielectric one end is coated with electrode.
On the other hand adopt a kind of production method of variable condenser, comprising:
Printed circuit and electrode terminal on carrier, make upper strata diaphragm and lower floor's diaphragm；Make separator；
Described lower floor diaphragm is placed in bottom, separator is placed on lower floor's diaphragm；Dielectric is put into separator
Correspondence position, upper strata diaphragm is placed on separator；
The lower floor placing diaphragm, separator and upper strata diaphragm are pressed into an entirety；
By adhesive layer, described lower floor diaphragm is sticked on substrate so that described entirety sticks on substrate.
The beneficial effects of the present invention is: by printed circuit on two diaphragms, setting isolation between two circuit
Part, arranges separator around dielectric, by changing the stress of dielectric both sides, realizes changing of the capacitance between dielectric
Become so that initial capacitance value is zero, and keep a range of change under external force, the variable condenser in this programme
Structure and simple production process, reliability is high.
Brief description
For the technical scheme being illustrated more clearly that in the embodiment of the present invention, below will be to institute in embodiment of the present invention description
Need use accompanying drawing be briefly described it should be apparent that, drawings in the following description be only the present invention some enforcement
Example, for those of ordinary skill in the art, on the premise of not paying creative work, can also be implemented according to the present invention
The content of example and these accompanying drawings obtain other accompanying drawings.
Fig. 1 is a kind of structure chart of first embodiment of variable condenser provided in an embodiment of the present invention.
Fig. 2 is the partial enlarged drawing at a in Fig. 1.
Fig. 3 is a kind of upper strata diaphragm, separator and dielectric cooperation of variable condenser provided in an embodiment of the present invention
Schematic diagram.
Fig. 4 is a kind of upper strata diaphragm of variable condenser provided in an embodiment of the present invention, separator and dielectric another
Cooperation schematic diagram.
Fig. 5 is a kind of structural representation of the upper strata diaphragm of variable condenser provided in an embodiment of the present invention.
Fig. 6 is a kind of structural representation of lower floor's diaphragm of variable condenser provided in an embodiment of the present invention.
Fig. 7 is a kind of conspectus of variable condenser provided in an embodiment of the present invention.
Fig. 8 is a kind of method flow diagram of the production method of variable condenser provided in an embodiment of the present invention.
Wherein: 10- contact；1- upper strata diaphragm；11- upper strata circuit；12- upper electrode terminal；2- separator；21- through hole；
22- air slot；3- dielectric；4- lower floor diaphragm；41- lower circuit；42- lower electrode terminals；5- adhesive layer；6- substrate.
Specific embodiment
For make present invention solves the technical problem that, the technical scheme that adopts and the technique effect that reaches clearer, below
By combine accompanying drawing the technical scheme of the embodiment of the present invention is described in further detail it is clear that described embodiment only
It is a part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, those skilled in the art exist
The every other embodiment being obtained under the premise of not making creative work, broadly falls into the scope of protection of the invention.
Refer to Fig. 1, it is a kind of structure side of first embodiment of variable condenser provided in an embodiment of the present invention
Block diagram.The variable condenser of the present embodiment is mainly used in variable capacity device or capacitance-type switch device in electronic equipment.
As shown in figure 1, this variable condenser, comprising: soft upper strata diaphragm 1, separator 2 and the soft lower floor's diaphragm stacking gradually
4, it is provided with the dielectric 3 of high dielectric constant between described upper strata diaphragm 1 and lower floor's diaphragm 4；Described upper strata diaphragm 1 and dielectric
3 relative sides are provided with upper strata circuit 11, and the head end of described upper strata circuit 11 is corresponding with the size and location of dielectric 3 to be set
Put；Described lower floor diaphragm 4 side relative with dielectric 3 is provided with lower circuit 41, the head end of described lower circuit 41 and electricity
The size and location of medium 3 is correspondingly arranged；Described separator 2 is arranged at the described side of dielectric 3 or the edge of upper surface makes
Obtain described dielectric 3 to separate with the head end of described upper strata circuit 11.
By printed circuit on two diaphragms, separator 2 is set between two circuit, arranges around dielectric 3
Separator 2, by changing the stress of dielectric 3 both sides, realizes the change of capacitance between dielectric 2 so that initial capacitance
Value is zero, and keeps a range of change under external force, the variable condenser structure in this programme and production technology
Simply, reliability is high.
Preferably, described separator 2 is the multiple support feets being uniformly arranged in the side of dielectric 3 or is sheathed on dielectric
The support tube of 3 side；The height of described support feet or support tube is slightly larger than described dielectric thickness.
As shown in figure 3, being uniformly arranged multiple support feets in the side of dielectric 3, the height of described support feet is slightly larger than institute
State dielectric thickness, then on condition that an external force is not applied, the upper strata circuit 11 on upper strata diaphragm 1 will not be situated between with described electricity
Matter 3 contacts, and now can be considered as off-position；Certainly, also can a sheathed support tube around dielectric 3 further, electricity is situated between
The upper surface of matter 3 is less than the open end of support tube, when pressing upper strata diaphragm 1, upper strata diaphragm 1 stress deformation and dielectric 3
Upper surface.
Preferably, described separator 2 is the many support feets being uniformly arranged at the edge of the upper surface of dielectric 3 or is arranged at
The one circle support ring at the edge of upper surface.
As shown in figure 4, being uniformly arranged multiple support feets at the edge of the upper surface of dielectric 3, in this, as support member, this
In scheme, also can provide the more permanent use longevity further in the edge setting one circle support ring of the upper surface of dielectric 3
Life.
In the set-up mode of this several separator 2, the shape all in accordance with dielectric 3 is set, for example dielectric 3
Section be circle, then support tube be round tube, by that analogy.
Another kind of design, in order to ensure the Stability Analysis of Structures of the variable condenser in this programme, described separator 2 and institute
State upper strata diaphragm 1 and lower floor's diaphragm 4 is correspondingly arranged；Through hole 21 is offered on described separator 2, described dielectric 3 is arranged at institute
State in through hole 21, the tail end of described upper strata circuit 11 is electrically connected with the upper electrode terminal 12 of the tail end of described upper strata diaphragm 1；Institute
The lower electrode terminals 42 stating the tail end of lower circuit 41 with the tail end of described lower floor diaphragm 4 are electrically connected with.
By printed circuit on two diaphragms, the structure of upper strata diaphragm 1 and lower floor's diaphragm 4 is specifically as Fig. 3 and Fig. 6 institute
Show, separator 2 is set between two circuit, through hole 21 is opened up on separator 2, dielectric 3 is set in through hole 21, passes through
Changing the stress of dielectric 3 both sides, thus changing the distance between upper strata circuit 11 and lower circuit 41, realizing dielectric 3
The change of capacitance, dielectric 3 and 3 liang of dielectric rectify to circuit constitute a variable condenser, after composition can
The conspectus of variodenser as shown in fig. 7, the initial capacitance value of variable condenser in this programme is zero, and in outer masterpiece
With a range of change of lower holding, the variable condenser structure in this programme and simple production process, reliability height.
The following is a kind of second embodiment of variable condenser provided in an embodiment of the present invention, with this variable condenser
First embodiment is compared, and second embodiment further illustrates the implementation of the capacitance variations of this variable condenser, and
Illustrate the implementation of the wherein layout type of circuit and other accessory structure.
Concrete as shown in figure 1, this variable condenser, also include: contact 10, described contact 10 front end is soft spheroid, soft
Matter cone or soft tack；The front end of described contact 10 is arranged at the head end of described upper strata diaphragm 1, for passing to external force
Tunic piece 1.
The effect of contact 10 is that external force is passed to capacitive means, contact 10 near one end of capacitive means, that is, before
End is a soft spheroid, soft cone or soft tack, and it is proper that wherein soft tack principle does capacitance switch, because
Can be smaller with a pole of integrated pushing electric capacity, switch over travel；Soft cone can be circular cone or pyramid, and soft cone is to electric capacity
The control of change is more fine；Comparatively, soft spheroid has preferable balance between transfiguration stroke and transfiguration fineness.
Certainly, soft spheroid here is not limited to absolute ball, and hemisphere actually can also reach identical effect, spheroid
Can be achieved on transfiguration driving.Circuit on upper strata diaphragm 1 and lower floor's diaphragm 4 is equivalent to two electrodes of electric capacity, works as contact
10 receive external force effect when, electrode is changed with the contact area of dielectric 3, and the capacity of capacitive means changes, thus
Realize the change of the additional strength of detection.
Preferably, described variable condenser, as shown in figure 1, also include: adhesive layer 5 and substrate 6, described adhesive layer 5 is by institute
State lower floor's diaphragm 4 to stick on described substrate 6.Described substrate 6 is stainless steel substrate, and described substrate 6 is provided with draw-in groove or card column.
The Main Function of adhesive-layer exactly lower floor's diaphragm 4 is bonded on substrate 6, and substrate 6 should select bend resistance material, and
And should have the physical features such as hardness is high, structural failure is little, to stand the stress that contact 10 transmits；Meanwhile, substrate 6 is gone back
Variable condenser is positioned, carries variable condenser, facilitate the installation of variable condenser.In order to easy for installation, substrate 6 sets
It is equipped with draw-in groove or card column, directly pass through plug and can achieve Fast Installation；Certainly, lower floor's diaphragm 4 and substrate 6 also can be by welding
Realize fixing etc. mode.
Further, described separator 2 offers one end to be connected with described through hole 21, the other end is arranged at separator 2
Side air slot 22.Described upper strata circuit 11 and lower circuit 41 are elastomeric material circuit.Described upper electrode terminal 12
It is flexible electrode terminal with lower electrode terminals 42.Described upper strata circuit 11 and lower circuit 41 respectively with described upper electrode terminal
12 and lower electrode terminals 42 one printed and formed.Described dielectric 3 is resistance to stress dielectric, and one end of described dielectric 3 is coated with
Electrode.
Refer to Fig. 2, it is the partial enlarged drawing at a in Fig. 1, herein mainly air slot, the effect of air slot 22 is
After upper strata diaphragm 1, separator 2 and lower floor's diaphragm 4 are crimped sealing, discharge the air in through hole 21.Elastomeric material circuit energy
The circuit is enough allowed to restore to the original state it is ensured that being capable of the purpose of variable capacitance after being stressed deformation, simultaneously elastomeric material
Design also can extend the service life of product, prevents because repeatedly pressing the electrode damage leading to.Upper electrode terminal 12 and under
Electrode terminal 42 setting is flexible electrode terminal can allow it prevent in arbitrarily angled installation, have more preferable range of application.
Integrally printed and formed can ensure that there is not secondary connection, produce more convenient, connection effect is also more preferable.Upper electrode terminal 12 He
Lower electrode terminals 42 can be connected in electronic equipment by way of welding or plugging.Dielectric 3 is to have high dielectric constant
Material, and there is the physical characteristic of resistance to stress so that the capacity of capacitor is big as far as possible, one end plating of dielectric 3
There is electrode.
The following is the embodiment of the production method of one of this programme variable condenser, this embodiment is used for realizing above-mentioned
The industrial production of variable condenser, both belong to same design, and the detail content of not detailed description, refers in the present embodiment
The embodiment of above-mentioned variable condenser.
As shown in figure 8, the production method of this variable condenser, comprising:
Step s101: printed circuit and electrode terminal on carrier, make upper strata diaphragm 1 and lower floor's diaphragm 4；Make isolation
Part 2.
Step s102: described lower floor diaphragm 4 is placed in bottom, separator 2 is placed on lower floor's diaphragm 4；By dielectric 3
Put into the correspondence position of separator 2, upper strata diaphragm 1 is placed on separator 2.
Step s103: the lower floor placing diaphragm 4, separator 2 and upper strata diaphragm 1 are pressed into an entirety.
Step s104: sticked on substrate 6 described lower floor diaphragm 4 so that described entirety sticks at substrate 6 by adhesive layer 5
On.
Method in the present embodiment is used for realizing the industrialized production of above-mentioned variable condenser, and description in this is to be directed to
In the production of single variable condenser, and in actual production process, upper strata diaphragm 1 and lower floor's diaphragm 4 are once at one piece
The printing of multiple circuit is completed on jigsaw, completes the prefabricated of multiple separators 2 on one block of plate simultaneously, for example, open up through hole, draw
Determine profile of separator 2 etc., the crude green body of variable condenser will be obtained after three pieces of whole plate pressings in segmentation, then carry out bonding close
The work such as envelope.
Above content is only presently preferred embodiments of the present invention, for those of ordinary skill in the art, according to the present invention's
Thought, all will change in specific embodiments and applications, and this specification content should not be construed as to the present invention
Restriction.
Claims (9)
1. a kind of variable condenser is it is characterised in that include: the soft upper strata diaphragm (1) that stacks gradually, separator (2) and
Soft lower floor's diaphragm (4), is provided with the dielectric of high dielectric constant between described upper strata diaphragm (1) and lower floor's diaphragm (4)
(3)；Described upper strata diaphragm (1) side relative with dielectric (3) is provided with upper strata circuit (11), described upper strata circuit (11)
Head end is correspondingly arranged with the size and location of dielectric (3)；Described lower floor diaphragm (4) the side setting relative with dielectric (3)
There is lower circuit (41), the head end of described lower circuit (41) and the size and location of dielectric (3) are correspondingly arranged；Described isolation
The edge of side or upper surface that part (2) is arranged at described dielectric (3) makes described dielectric (3) and described upper strata circuit
(11) head end separates；
Described separator (2) is correspondingly arranged with described upper strata diaphragm (1) and lower floor's diaphragm (4)；Offer on described separator (2)
Through hole (21), described dielectric (3) is arranged in described through hole (21), described separator (2) offers one end logical with described
Hole (21) is connected, and the other end is arranged at the air slot (22) of the side of separator (2).
2. a kind of variable condenser according to claim 1 is it is characterised in that also include: contact (10), described contact
(10) front end is soft spheroid, soft cone or soft tack；The front end of described contact (10) is arranged at described upper strata diaphragm (1)
Head end, for external force is passed to upper strata diaphragm (1).
3. a kind of variable condenser according to claim 1 is it is characterised in that also include: adhesive layer (5) and substrate (6),
Described adhesive layer (5) sticks at described lower floor diaphragm (4) on described substrate (6).
4. a kind of variable condenser according to claim 3 it is characterised in that described substrate (6) be stainless steel substrate, institute
State and be provided with draw-in groove or card column on substrate (6).
5. a kind of variable condenser according to claim 1 is it is characterised in that described separator (2) is in dielectric (3)
The side multiple support feets being uniformly arranged or the side being sheathed on dielectric (3) support tube；Described support feet or support tube
Height be slightly larger than described dielectric thickness.
6. a kind of variable condenser according to claim 1 is it is characterised in that described separator (2) is in dielectric (3)
The edge many support feets being uniformly arranged of upper surface or the edge that is arranged at upper surface a circle support ring.
7. a kind of variable condenser according to claim 1 is it is characterised in that described upper strata circuit (11) and lower circuit
(41) it is elastomeric material circuit；
The tail end on described upper strata circuit (11) is electrically connected with the upper electrode terminal (12) of the tail end on described upper strata diaphragm (1)；Institute
The lower electrode terminals (42) stating the tail end of lower circuit (41) with the tail end of described lower floor diaphragm (4) are electrically connected with；
Described upper electrode terminal (12) and lower electrode terminals (42) are flexible electrode terminal.
8. a kind of variable condenser according to claim 1 is it is characterised in that described dielectric (3) is resistance to stress electricity Jie
Matter, one end of described dielectric (3) is coated with electrode.
9. a kind of production method of variable condenser is it is characterised in that include:
Printed circuit and electrode terminal on carrier, make upper strata diaphragm (1) and lower floor's diaphragm (4)；Make separator (2)；
Described lower floor diaphragm (4) is placed in bottom, separator (2) is placed on lower floor's diaphragm (4)；Dielectric (3) is put into
The correspondence position of separator (2), upper strata diaphragm (1) is placed on separator (2)；
The lower floor placing diaphragm (4), separator (2) and upper strata diaphragm (1) are pressed into an entirety；
Described lower floor diaphragm (4) is sticked above so that described entirety sticks on substrate (6) by substrate (6) by adhesive layer (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410184655.9A CN103943360B (en) | 2014-05-04 | 2014-05-04 | Variable capacitor and production method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410184655.9A CN103943360B (en) | 2014-05-04 | 2014-05-04 | Variable capacitor and production method thereof |
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| CN103943360A CN103943360A (en) | 2014-07-23 |
| CN103943360B true CN103943360B (en) | 2017-01-25 |
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| CN201410184655.9A Active CN103943360B (en) | 2014-05-04 | 2014-05-04 | Variable capacitor and production method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105225838A (en) * | 2015-10-19 | 2016-01-06 | 郭道育 | Two-dimensional variable capacitor |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101421692A (en) * | 2006-02-10 | 2009-04-29 | 美利肯公司 | Flexible capacitive sensor |
| CN102589759A (en) * | 2012-02-20 | 2012-07-18 | 浙江大学 | Bionic flexible touch sense sensing array based on piezoresistive type and capacitance type combination |
| CN203931827U (en) * | 2014-05-04 | 2014-11-05 | 广东小天才科技有限公司 | A kind of variable capacitor |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7301351B2 (en) * | 2006-02-10 | 2007-11-27 | Milliken & Company | Printed capacitive sensor |
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2014
- 2014-05-04 CN CN201410184655.9A patent/CN103943360B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101421692A (en) * | 2006-02-10 | 2009-04-29 | 美利肯公司 | Flexible capacitive sensor |
| CN102589759A (en) * | 2012-02-20 | 2012-07-18 | 浙江大学 | Bionic flexible touch sense sensing array based on piezoresistive type and capacitance type combination |
| CN203931827U (en) * | 2014-05-04 | 2014-11-05 | 广东小天才科技有限公司 | A kind of variable capacitor |
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