CN209085807U - Become capacitive pressure transducer - Google Patents
Become capacitive pressure transducer Download PDFInfo
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- CN209085807U CN209085807U CN201822027993.8U CN201822027993U CN209085807U CN 209085807 U CN209085807 U CN 209085807U CN 201822027993 U CN201822027993 U CN 201822027993U CN 209085807 U CN209085807 U CN 209085807U
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- multilayer ceramic
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- conductive spacer
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Abstract
The utility model provides change capacitive pressure transducer, including Double-layer flexible circuit board, multilayer ceramic capacitor, soft conductive spacer；The multilayer ceramic capacitor and the close configuration of soft conductive spacer, the Double-layer flexible circuit board with through-hole or notch is equipped between the multilayer ceramic capacitor and soft conductive spacer, the multilayer ceramic capacitor is set to above through-hole or notch, the soft conductive spacer is set to through-hole or bottom of the gap, the soft conductive spacer is deformed by external pressure, across the through-hole or notch of flexible circuit board, contacted with the ceramic dielectric of multilayer ceramic capacitor；External pressure changes and then changes the contact area of the ceramic dielectric of soft conductive spacer and multilayer ceramic capacitor, to change the capacitance between soft conductive spacer and the external electrode of multilayer ceramic capacitor access.The utility model reduces component number, simplifies production assembly technology, reduces costs.
Description
Technical field
The utility model relates to a kind of sensors, more specifically, being related to becoming capacitive pressure transducer.
Background technique
Currently, having been used for many years using capacitance sensor is become as the method for pressure sensor.Become capacitance sensing
Device is actually the plate condenser of a standard.Capacitor is formed by soft conducting deformable electrode and a metal electrode
The two poles of the earth；The medium of capacitor is formed by dielectric and felt pad.Metal electrode needs to fit closely together with dielectric, intermediate
There cannot be air that could guarantee the performance of sensor.Felt pad is placed between soft conducting deformable electrode and dielectric, insulation
For pad usually in centre meeting aperture, allowing between soft conducting deformable electrode and dielectric has a air gap.Working principle is asked
With reference to United States Patent (USP) US5206785.A variety of implementation methods can refer to United States Patent (USP) US6853369B2, Chinese patent
CN101009158B, CN101393491B and CN102419672B.
Two electrodes of current pressure sensor require to be connected to measuring circuit.Wherein soft conducting deformable
Electrode be cannot material resistant to high temperature, can only be connected with the mode of physical contact.In order to guarantee the reliability of electrical connection, at present
The method being widely used is to cooperate precision metallic electrode plus fine assembly by accurate plastic mould.It is such to manufacture
Journey is extremely complex, and production efficiency is low.Another metal electrode and dielectric for becoming capacitance sensor fit closely together,
Centre cannot have air.Therefore current way is by conductive metal direct plating by coating process in dielectric wherein one side
On.This way considerably increases the manufacturing process difficulty of sensor, hence it is evident that increases cost.
Summary of the invention
The technical purpose of the utility model is the shortcomings that overcoming in the prior art；There is provided a kind of structure it is simple, it is at low cost, system
Make the change capacitive pressure transducer of simple process.
To realize the above technical purpose, the technical solution of the utility model is: including Double-layer flexible circuit board, multi-layer ceramics
Capacitor, soft conductive spacer；The multilayer ceramic capacitor and the close configuration of soft conductive spacer, the multi-layer ceramic capacitance
The Double-layer flexible circuit board with through-hole or notch is equipped between device and soft conductive spacer, the multilayer ceramic capacitor is set to
Above through-hole or notch, the soft conductive spacer is set to through-hole or bottom of the gap, and the multilayer ceramic capacitor includes the
One component and second component, the first component include an external electrode or multiple external electrodes for multilayer ceramic capacitor,
The multiple electrodes that the second component includes the ceramic dielectric of multilayer ceramic capacitor, is set to inside multilayer ceramic capacitor
Layer, each external electrode are connected to the electrode layer being set to inside multilayer ceramic capacitor；The soft conductive spacer
It is deformed by external pressure, across the through-hole or notch of flexible circuit board, is connect with the ceramic dielectric of multilayer ceramic capacitor
Touching；External pressure changes and then changes the contact area of the ceramic dielectric of soft conductive spacer and multilayer ceramic capacitor, thus
Change the capacitance between soft conductive spacer and the external electrode of multilayer ceramic capacitor access.
Further, the Double-layer flexible circuit board includes upper conductive layer, insulating layer, lower conductiving layer, the upper conductive layer
It is tightly attached to the top of insulating layer, the lower conductiving layer is tightly attached to the lower section of insulating layer.
Further, an external electrode of the multilayer ceramic capacitor or multiple external electrodes are all electric with upper conductive layer
Property connection.
Further, after the soft conductive spacer is pressurized with lower conductiving layer electrical communication.
Further, the through-hole or notch run through upper conductive layer, insulating layer, lower conductiving layer.
Further, the section of the Double-layer flexible circuit board is in L font.
Further, the soft conductive spacer side is equipped with pressure application component, and the pressure applies the upper end of component
Equipped with convex block, after pressure applies component compression, convex block applies pressure to soft conductive spacer.
Further, the Double-layer flexible circuit board is also connect with external measuring circuitry.
Further, when the quantity of the external electrode of the multilayer ceramic capacitor is 2,2 external electrodes are set respectively
It sets in the two sides of multilayer ceramic capacitor.
Further, the electrode layer being connected to respectively with 2 external electrodes is interlaced to be set in multilayer ceramic capacitor
Portion.
The change capacitive pressure transducer of the utility model, has the advantages that
1, the characteristics of the utility model using the non-electrode part of multilayer ceramic capacitor is all dielectric substance, instead of this
The device for the specialized dielectric that field generallys use, greatly reduces cost.
2, the multilayer ceramic capacitor of the utility model using capacitor electrode and capacitor dielectric inherently
Characteristic together is fitted closely, specialized dielectric device commonly employed in the art is eliminated and needs plating metal conductive electrode
Cost is greatly saved in technique.
3, the utility model using the insulating layer of Double-layer flexible circuit board instead of felt pad in variodenser in this field,
Reduce component number, simplifies production assembly technology.
4, the specialized dielectric device very little of this field, the electrode of plated film is very thin on surface, to be assemblied in fine in pen
In structure, these conditions result in that electrical communication this electrode is relatively difficult, and directly welding is nearly impossible operation, usually
Way be to be in close contact using oxidation resistant special-purpose metal device and coated conducting layer.The utility model is by using Double-layer flexible
The external electrode of the conductive layer connection multilayer ceramic capacitor of circuit board, is usually welded with common scolding tin, technique is very simple
It is mature, hence it is evident that reduce number of devices, structure is simple, high reliablity, and production precision is guaranteed, low in cost.
5, the utility model advantage is that the bendable folding endurance of Double-layer flexible circuit board makes change capacitive pressure transducer and detection electric
The connection type on road is very flexible, is very suitable to large batch of production.
6, soft conducting deformable electrode is usually conductive rubber or electric silica gel, it is ensured that measuring circuit is led with soft
Electric deformable electrode is reliably electrically connected, and cannot use welding procedure.The usual way of this field is using anti-oxidant
Special-purpose metal device contacted with soft conducting deformable electrode.The utility model surface antioxygen usual using flexible circuit board
Chemical industry skill, such as the methods of gold-plated, nickel plating or turmeric handle the conductive layer that contacts with soft conductive spacer, technique very simply at
It is ripe, hence it is evident that reduce number of devices, structure is simple, high reliablity, and production precision is guaranteed, low in cost.
The additional aspect of the utility model and advantage will be set forth in part in the description, partially will be from following description
In become obvious, or recognized by the practice of the utility model.
Detailed description of the invention
Fig. 1 is sectional view of the utility model when not writing；
Fig. 2 is sectional view of the utility model when writing；
Fig. 3 is the internal structure explosive view of the utility model；
Fig. 4 is the internal structure perspective view one of the utility model；
Fig. 5 is the internal structure perspective view two of the utility model；
Fig. 6 is the internal structure perspective view three of the utility model；
Fig. 7 is the internal structure perspective view four of the utility model；
Fig. 8 is the Double-layer flexible board structure of circuit figure of the utility model；
Fig. 9 is the right view of Fig. 8；
Figure 10 is the Double-layer flexible circuit board perspective view one of the utility model；
Figure 11 is the Double-layer flexible circuit board perspective view two of the utility model；
Figure 12 is the internal structure chart of the multilayer ceramic capacitor of the utility model；
Wherein, 1, Double-layer flexible circuit board；2, shell；3, multilayer ceramic capacitor；4, soft conductive spacer；5, pressure
Apply component；11, upper conductive layer；12, insulating layer；13, through-hole or notch；14, lower conductiving layer；31, outside multilayer ceramic capacitor
Portion's electrode；32, multilayer ceramic capacitor interior electrode layer；33, multilayer ceramic capacitor ceramic dielectric.
Specific embodiment
The embodiments of the present invention are described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning
Same or similar element or element with the same or similar functions are indicated to same or similar label eventually.Below by ginseng
The embodiment for examining attached drawing description is exemplary, it is intended to for explaining the utility model, and should not be understood as to the utility model
Limitation.
In one embodiment of the utility model, such as Fig. 1-12, become capacitive pressure transducer, including Double-layer flexible circuit board
1, multilayer ceramic capacitor 3, soft conductive spacer 4, pressure apply component 5；Multilayer ceramic capacitor 3 and soft conductive spacer 4
Close to configuration, the Double-layer flexible circuit board with through-hole or notch 13 is equipped between multilayer ceramic capacitor 3 and soft conductive spacer 4
1, multilayer ceramic capacitor 3 is set to 13 top of through-hole or notch, and soft conductive spacer 4 is set to 13 lower section of through-hole or notch,
Multilayer ceramic capacitor 3 includes the first component and second component, and the first component includes an external electrical of multilayer ceramic capacitor 3
Pole 31 or multiple external electrodes 31, second component include the ceramic dielectric 33 of multilayer ceramic capacitor 3, are set to multi-layer ceramics electricity
Multiple electrodes layer 32 inside container 3, each external electrode 31 and the electrode layer 32 being set to inside multilayer ceramic capacitor 3
Connection；The lower section of soft conductive spacer 4 is equipped with pressure and applies component 5, and pressure applies after 5 bottom of component is pressurized to soft conductive pad
Piece 4 applies pressure, deforms soft conductive spacer 4, and the ceramics for changing soft conductive spacer 4 and multilayer ceramic capacitor 3 are situated between
The contact area of matter 33, to change the electricity between the external electrode 31 that soft conductive spacer 4 and multilayer ceramic capacitor 3 access
Capacitance, and then constitute a pressure sensor.
Wherein, pen core can also be selected to apply component 5 as pressure, when writing, pen core is pressurized, then to soft conduction
Gasket 4 applies pressure, and changes the contact area of soft conductive spacer 4 and the ceramic dielectric 33 of multilayer ceramic capacitor 3, thus
Change the capacitance between the external electrode 31 that soft conductive spacer 4 and multilayer ceramic capacitor 3 access.In addition, applying different
Pressure can then make soft conductive spacer 4 and the contact area of the ceramic dielectric 33 of multilayer ceramic capacitor 3 also different.
The utility model can also be connect by Double-layer flexible circuit board 1 with external measuring circuitry, can will be because of pressure
And the capacitance changed is transferred to external measuring circuitry, and pressure applying unit is calculated by capacitance by external measuring circuitry
The pressure that part is born, to realize pressure detecting.
Further, it is also possible to by Double-layer flexible circuit board 1, multilayer ceramic capacitor 3, soft conductive spacer 4, pressure applying unit
Part 5 is all set in a shell 2.
In another embodiment of the utility model, the external electrode of multilayer ceramic capacitor 3, soft conductive spacer 4 are all
It is electrically connected, the signal of multilayer ceramic capacitor 3, soft conductive spacer 4 is passed through double-deck soft with Double-layer flexible circuit board 1
Property circuit board 1 be transferred to external measuring circuitry carry out calculation processing.
In another embodiment of the utility model, Double-layer flexible circuit board 1 also uses double-sided PCB structure, such as Fig. 8-
Shown in 11, Double-layer flexible circuit board 1 includes upper conductive layer 11, insulating layer 12, lower conductiving layer 14, and upper conductive layer 11 is tightly attached to insulation
The top of layer 12, lower conductiving layer 14 are tightly attached to the lower section of insulating layer 12.One external electrode 31 or more of multilayer ceramic capacitor 3
A external electrode 31 all with upper 11 electrical communication of conductive layer；Such as by being physically contacted and compressing, by welding or conducting resinl
The modes such as hydropexis are fixed.Soft conductive spacer 4 be pressurized after with 14 electrical communication of lower conductiving layer, wherein soft conductive spacer 4 exists
Before compression, do not need to guarantee and 14 electrical communication of lower conductiving layer.
In another embodiment of the utility model, in order to reduce whole volume, insulating layer 12 is using sheet insulation base
Material.
In another embodiment of the utility model, for the ease of integrating, all used on upper conductive layer 11 and lower conductiving layer 14
In welding or pass through physical contact electrical communication component.
In another embodiment of the utility model, in order to make to form between soft conductive spacer 4 and ceramic dielectric 33
One the air gap, through-hole or notch 13 run through upper conductive layer 11, insulating layer 12, lower conductiving layer 14.
In another embodiment of the utility model, in order to be suitable for a shell, the section of Double-layer flexible circuit board 1 is in L
Font.
In another embodiment of the utility model, for the ease of applying pressure, pressure applying unit to soft conductive spacer 4
The upper end of part 5 is equipped with convex block, and after pressure applies the compression of component 5, convex block applies pressure to soft conductive spacer 4.It is soft when implementing
Property conductive spacer 4 above be equipped with the random geometry convex block of hemispherical or triangle or trapezoidal shape, improve contact sensitivity, into
And improve detection sensitivity.
In another embodiment of the utility model, the quantity of the external electrode 31 of multilayer ceramic capacitor 3 can be more
It is a, and this multiple external electrode 31 (can be connect with upper conductive layer 11 respectively as the output electrode of multilayer ceramic capacitor 3
Electrode), also can connect together collectively as the output electrode of multilayer ceramic capacitor 3.
In order to better illustrate the present embodiment, preferably 2 external electrodes 31, as shown in figure 12, when multilayer ceramic capacitor 3
External electrode 31 quantity be 2 when, 2 external electrodes 31 are separately positioned on the two sides of multilayer ceramic capacitor 3.Respectively with
The electrode layer 32 of 2 external electrodes 31 connection is interlaced to be set to inside multilayer ceramic capacitor 3, this 2 external electrodes 31
It can also can connect together respectively as the output electrode of multilayer ceramic capacitor 3 collectively as multilayer ceramic capacitor 3
Output electrode.
The characteristics of multilayer ceramic capacitor of the utility model uses this monolithic multilayer structure is manufacturing cost is low, body
Product is small, adapts to the application of a variety of occasions, and adjustable capacitance can also be generated by pressure, and the physical quantity of measurement is with pressure
Transformation it is obvious, be easy measurement, and whole low in energy consumption of circuit, there is good linear and precision.In addition, the utility model is more
Multiple electrodes layer 32 is closely surrounded by ceramic dielectric 33 inside layer ceramic capacitor, and multilayer ceramic capacitor surface is non-conductive
Part is all ceramic dielectric 33, is conducive to be bonded using capacitor intrinsic dielectric surface and electrode for capacitors with dielectric
Close feature eliminates expensive specialized dielectric device, cost is greatly saved, and simplifies manufacturing process, manufactures work
Skill is than traditional metal coating simple process, additionally it is possible to substantially reduce process costs.
In another embodiment of the utility model, 1 common thickness about 0.13mm of Double-layer flexible circuit board.
The advantage of the utility model is that special device and structure are replaced with Double-layer flexible circuit board (FPC), hence it is evident that is reduced
Number of devices, structure is simple, high reliablity, and production precision is guaranteed, low in cost.Double-layer flexible circuit board (FPC) can
Bending makes the connection type of sensor and detection circuit very flexible, is very suitable to large batch of production.Double-layer circuit board is logical
Surface oxidation-resistant treatment process eliminates the dedicated anti-oxidation metal device that this field usually requires, is greatly saved into
This, simplifies manufacturing process.
Although the embodiments of the present invention have been shown and described above, it is to be understood that above-described embodiment is
Illustratively, it should not be understood as limiting the present invention, those skilled in the art are not departing from the utility model
Principle and objective in the case where above-described embodiment can be changed in the scope of the utility model, modify, replace and
Modification.The scope of the utility model is extremely equally limited by appended claims.
Claims (10)
1. becoming capacitive pressure transducer, it is characterised in that: including Double-layer flexible circuit board, multilayer ceramic capacitor, soft conduction
Gasket；The multilayer ceramic capacitor and the close configuration of soft conductive spacer, the multilayer ceramic capacitor and soft conductive pad
The Double-layer flexible circuit board with through-hole or notch is equipped between piece, the multilayer ceramic capacitor is set on through-hole or notch
Side, the soft conductive spacer are set to through-hole or bottom of the gap, and the multilayer ceramic capacitor includes the first component and second
Component, the first component include an external electrode or multiple external electrodes for multilayer ceramic capacitor, the second component
Ceramic dielectric including multilayer ceramic capacitor, the multiple electrodes layer being set to inside multilayer ceramic capacitor, it is each described outer
Portion's electrode is all connected to the electrode layer being set to inside multilayer ceramic capacitor；The soft conductive spacer is produced by external pressure
Change shape, across the through-hole or notch of flexible circuit board, contacts with the ceramic dielectric of multilayer ceramic capacitor；External pressure changes
And then change the contact area of the ceramic dielectric of soft conductive spacer and multilayer ceramic capacitor, to change soft conductive spacer
Capacitance between the external electrode of multilayer ceramic capacitor access.
2. becoming capacitive pressure transducer as described in claim 1, it is characterised in that: the Double-layer flexible circuit board includes above leading
Electric layer, insulating layer, lower conductiving layer, the upper conductive layer are tightly attached to the top of insulating layer, and the lower conductiving layer is tightly attached to insulating layer
Lower section.
3. becoming capacitive pressure transducer as claimed in claim 2, it is characterised in that: one of the multilayer ceramic capacitor is outer
Portion's electrode or multiple external electrodes all with upper conductive layer electrical communication.
4. becoming capacitive pressure transducer as claimed in claim 2, it is characterised in that: after the soft conductive spacer compression under
Conductive layer electrical communication.
5. becoming capacitive pressure transducer as claimed in claim 2, it is characterised in that: the through-hole or notch run through upper conduction
Layer, insulating layer, lower conductiving layer.
6. becoming capacitive pressure transducer as described in claim 1, it is characterised in that: the section of the Double-layer flexible circuit board is in
L font.
7. becoming capacitive pressure transducer as described in claim 1, it is characterised in that: the soft conductive spacer side is equipped with pressure
Power applies component, and the upper end that the pressure applies component is equipped with convex block, and pressure applies after component is pressurized, and convex block is to soft conductive pad
Piece applies pressure.
8. as described in claim 1 become capacitive pressure transducer, it is characterised in that: the Double-layer flexible circuit board also with outside
Measuring circuit connection.
9. becoming capacitive pressure transducer as described in claim 1, it is characterised in that: the external electrical of the multilayer ceramic capacitor
When the quantity of pole is 2,2 external electrodes are separately positioned on the two sides of multilayer ceramic capacitor.
10. becoming capacitive pressure transducer as claimed in claim 9, it is characterised in that: the electricity being connected to respectively with 2 external electrodes
Pole layer is interlaced to be set to inside multilayer ceramic capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822027993.8U CN209085807U (en) | 2018-12-05 | 2018-12-05 | Become capacitive pressure transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822027993.8U CN209085807U (en) | 2018-12-05 | 2018-12-05 | Become capacitive pressure transducer |
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| Publication Number | Publication Date |
|---|---|
| CN209085807U true CN209085807U (en) | 2019-07-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822027993.8U Active CN209085807U (en) | 2018-12-05 | 2018-12-05 | Become capacitive pressure transducer |
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| Country | Link |
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| CN (1) | CN209085807U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109341906A (en) * | 2018-12-05 | 2019-02-15 | 伍颖超 | Become capacitive pressure transducer |
-
2018
- 2018-12-05 CN CN201822027993.8U patent/CN209085807U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109341906A (en) * | 2018-12-05 | 2019-02-15 | 伍颖超 | Become capacitive pressure transducer |
| CN109341906B (en) * | 2018-12-05 | 2024-01-05 | 伍颖超 | Variable capacitance pressure sensor |
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