CN107767852A - A kind of piezoelectricity singing piece after improvement - Google Patents
A kind of piezoelectricity singing piece after improvement Download PDFInfo
- Publication number
- CN107767852A CN107767852A CN201711158749.9A CN201711158749A CN107767852A CN 107767852 A CN107767852 A CN 107767852A CN 201711158749 A CN201711158749 A CN 201711158749A CN 107767852 A CN107767852 A CN 107767852A
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- China
- Prior art keywords
- metal substrate
- plastic film
- piece
- piezoelectric ceramic
- ceramic piece
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000000758 substrate Substances 0.000 claims abstract description 88
- 229910052751 metal Inorganic materials 0.000 claims abstract description 84
- 239000002184 metal Substances 0.000 claims abstract description 84
- 239000002985 plastic film Substances 0.000 claims abstract description 65
- 229920006255 plastic film Polymers 0.000 claims abstract description 65
- 239000000919 ceramic Substances 0.000 claims abstract description 31
- 230000001070 adhesive effect Effects 0.000 claims abstract description 29
- 229920002635 polyurethane Polymers 0.000 claims abstract description 29
- 239000004814 polyurethane Substances 0.000 claims abstract description 29
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims abstract description 14
- 230000005611 electricity Effects 0.000 claims abstract description 14
- 229910052709 silver Inorganic materials 0.000 claims abstract description 14
- 239000004332 silver Substances 0.000 claims abstract description 14
- 239000000853 adhesive Substances 0.000 claims description 26
- 239000000463 material Substances 0.000 claims description 16
- 229920003023 plastic Polymers 0.000 claims description 9
- 239000004033 plastic Substances 0.000 claims description 9
- 229910000806 Latten Inorganic materials 0.000 claims description 3
- 239000011888 foil Substances 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims 2
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 claims 1
- 229910021529 ammonia Inorganic materials 0.000 claims 1
- 235000010985 glycerol esters of wood rosin Nutrition 0.000 claims 1
- 239000002313 adhesive film Substances 0.000 abstract description 3
- 210000003739 neck Anatomy 0.000 description 10
- 230000000694 effects Effects 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 230000009977 dual effect Effects 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 230000010354 integration Effects 0.000 description 3
- 229920000297 Rayon Polymers 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 229920006335 epoxy glue Polymers 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- KXDHJXZQYSOELW-UHFFFAOYSA-N Carbamic acid Chemical group NC(O)=O KXDHJXZQYSOELW-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000010985 leather Substances 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 239000000123 paper Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- -1 timber Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K9/00—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
- G10K9/12—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated
- G10K9/122—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated using piezoelectric driving means
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
The invention discloses the piezoelectricity singing piece after a kind of improvement, the outer surface of piezoelectric ceramic piece is coated with silver paste electricity level, the side of piezoelectric ceramic piece is provided with metal substrate, the side of metal substrate is provided with polyurethane adhesive and plastic film, metal substrate is fixed by polyurethane adhesive and plastic film and bonded, the outer surface of metal substrate is provided with neck, the outer surface of plastic film is provided with buckle, the outer surface of plastic film is provided with mounting groove, the inner bottom surface of mounting groove offers spliced eye, corresponding, the bottom surface of metal substrate is welded with inserting column；Piezoelectricity singing piece after this improvement, using plastic film substituted metal substrate as vibration substrate, improve structural strength, reduce cost of goods manufactured, continue service life, metal substrate is connected firmly with plastic film, and the working condition of geo-stationary is also at during high vibration, performance is more excellent, and it is higher to benefit from degree.
Description
Technical field
The present invention relates to technical field of electronic products, the piezoelectricity singing piece after specially a kind of improvement.
Background technology
Piezoelectricity singing piece is a kind of electronic product for the sounding that worked using piezoelectric ceramics piezo-electric effect, and it is because have power consumption
It is low, cost is low, reliability is high, resistance to severe working environment, the advantages that being not easy by electromagnetic interference, so be widely used in household electric
Device, especially vehicle use more, it is desirable to which vibration resistance, so the stability requirement to internal structure is higher, plastics are a kind of difficult
With cohesive material, conventional piezoelectricity singing piece is pasted from bi-component epoxy glue, generally existing problems with, first, plastics material
Matter fearness high temperature, such as PVC, the easy embrittlement under the larger environment of the temperature difference, PVC material non-refractory, material had been heating and curing
The frangible phenomenon that becomes fragile occurs in plastic film in journey, serious quality problem occurs, effect is difficult to make us receiving, second, epoxy glue
Water has hygroscopicity, and wet environment viscous force substantially dies down, and can not meet the market demand, causes product safety hidden danger, third, conventional
Piezoelectricity singing piece is only that metal substrate bonds piezoelectric ceramic piece, and cost is higher, and fragile, and service life is relatively low, meanwhile, it is existing
Piezoelectricity singing piece bonded only with viscose glue, the chemical property of viscose glue can push away length with bonding strength with useful life
And gradually fail, now metal substrate can both lose strength of association with piezoelectric ceramic piece, and ineffective.
The content of the invention
It is an object of the invention to provide the piezoelectricity singing piece after a kind of improvement, possesses high temperature resistant, and safe to use, structure is strong
The characteristics of degree is higher, solves in the prior art that service life is low, breakable problem.
To achieve the above object, the present invention provides following technical scheme：
A kind of piezoelectricity singing piece after improvement, including piezoelectric ceramic piece, silver paste electricity level, metal substrate and polyurethane are gluing
Agent, the outer surface of the piezoelectric ceramic piece are coated with silver paste electricity level, and silver paste electricity level uniform fold is in the both sides of piezoelectric ceramic piece, institute
The side for stating piezoelectric ceramic piece is provided with metal substrate, and the side of metal substrate is fixedly connected with piezoelectric ceramic piece, metal substrate
Opposite side be provided with polyurethane adhesive and plastic film, the polyurethane adhesive is uniformly applied to metal substrate and plastics
The joint face of diaphragm, the both sides of polyurethane adhesive are tightly bonded with metal substrate, plastic film respectively, and the metal substrate leads to
Cross polyurethane adhesive and fix bonding with plastic film；
The outer surface of the metal substrate is provided with neck, and neck is uniformly arranged around the center of circle of metal substrate, right therewith
Answer, the outer surface of the plastic film is provided with buckle, buckle and the mutual snapping of neck, the plastic film by buckle with
The mutual clamping of neck of the outer surface of metal substrate, the outer surface of plastic film are additionally provided with mounting groove, the mounting groove it is interior
Bottom surface offers the consistent spliced eye in multigroup aperture, and spliced eye is set in the side equi-spaced apart of plastic film, the spliced eye
Be internally provided with inserting column, one end of inserting column and the inner bottom surface of spliced eye abut, the other end Metal Substrate of inserting column
Welding is fixed in the bottom surface of piece, and the metal substrate fixes grafting by inserting column and the spliced eye of plastic film outer surface.
Preferably, silver paste electricity level is covered in the tow sides of piezoelectric ceramic piece by typography.
Preferably, the plastic film uses PET material, and metal substrate uses latten(-tin).
Preferably, the piezoelectric ceramic piece, metal substrate, polyurethane adhesive are arranged in order and close phase with plastic film
Even, gap is not produced between each other, the center of circle of piezoelectric ceramic piece, plastic film and metal substrate is correspondingly arranged at same horizontal line
On.
Preferably, the buckle and spliced eye are respectively around the uniform simultaneously circular array shape of arranging in the center of circle of plastic film
Formula.
Preferably, the outside dimension of the inserting column and the aperture size of spliced eye are corresponding consistent, the outer wall of inserting column with
The inwall of spliced eye is seamless applying, and the diameter dimension of mounting groove is corresponding identical with the diameter dimension of metal substrate, metal substrate card
In the mounting groove of plastic film side.
Compared with prior art, beneficial effects of the present invention are as follows：
Piezoelectricity singing piece after this improvement, apparatus main body selected material, material environmental protection, there is very high toughness, structure is strong
Degree is high, and service life is longer, and plastic film is mutually bonded by polyurethane adhesive with metal substrate and improves structural integrity, is adopted
By the use of plastic film substituted metal substrate as vibration substrate, cost of goods manufactured is reduced, continues service life, and polyurethane is gluing
The low-temperature setting temperature of agent is relatively low, and rate of drying is fast, and adhesion strength is higher, environment friendly and pollution-free, without obvious peculiar smell, uses model
Enclose extensively, construction technology is excellent, and metal substrate is chimeric with plastic film fixation and realizes integration, and device appearance is cleaner and tidier, easypro
Suitable, metal substrate realizes dual fixation by the connected mode of self structure with plastic film with Chemical Felter, more firmly,
Stably, the working condition of geo-stationary is also at during high vibration, performance is more excellent, and service behaviour is high, benefits from
Degree is high, and disclosure satisfy that more wide in range in continual working environment, the scope of application for a long time.
Brief description of the drawings
Fig. 1 is overall structure diagram of the present invention；
Fig. 2 is top view of the present invention；
Fig. 3 is plastic film structural representation of the present invention；
Fig. 4 is metal substrate bottom surface structure figure of the present invention.
In figure：1 piezoelectric ceramic piece, 2 silver paste electricity levels, 3 metal substrates, 31 necks, 32 inserting columns, 4 polyurethane adhesives, 5
Plastic film, 51 buckles, 52 spliced eyes, 53 mounting grooves.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
Refer to Fig. 1-4, the piezoelectricity singing piece after a kind of improvement, including piezoelectric ceramic piece 1, silver paste electricity level 2, metal substrate
3 and polyurethane adhesive 4, the outer surface of piezoelectric ceramic piece 1 is coated with silver paste electricity level 2, and the uniform fold of silver paste electricity level 2 is made pottery in piezoelectricity
The both sides of ceramics 1, silver paste electricity level 2 are covered in the tow sides of piezoelectric ceramic piece 1 by typography, for transmitting alternating current
Signal, piezoelectric ceramic piece 1 produce regular geometric deformation because of piezo-electric effect, and drive metal substrate 3 to produce vibration, piezoelectricity
The side of potsherd 1 is provided with metal substrate 3, and metal substrate 3 uses latten(-tin), and service life length, low in energy consumption, cost is low, can
To adapt to more severe working environment, the side of metal substrate 3 is fixedly connected with piezoelectric ceramic piece 1, metal substrate 3 it is another
Side is provided with polyurethane adhesive 4 and plastic film 5, and plastic film 5 uses PET material, plastic film
5 have very high toughness, can effectively improve structural strength, strengthen service life, and material environmental protection, are burnt even if generation
Non-toxic and non-pollution environmental-protecting material can be produced, polyurethane adhesive 4 is uniformly applied to the connection of metal substrate 3 and plastic film 5
Face, the both sides of polyurethane adhesive 4 are tightly bonded with metal substrate 3, plastic film 5 respectively, and metal substrate 3 passes through polyurethane adhesive
Stick 4 is fixed with plastic film 5 and bonded, and piezoelectric ceramic piece 1, metal substrate 3, polyurethane adhesive 4 and plastic film 5 are arranged successively
Arrange and closely coupled, do not produce gap between each other, piezoelectric ceramic piece 1, plastic film 5 are corresponding with the center of circle of metal substrate 3 to be set
Put in the same horizontal line, improve being completely embedded property, reinforcement structure intensity, allow product to can adapt to worse working environment,
By increasing plastic film 5 so that the substituted metal substrate 3 of plastic film 5 reduces cost of goods manufactured, prolonged as vibration substrate
Continue product service life, contain carbamate groups, the low temperature of polyurethane adhesive 4 in the strand of polyurethane adhesive 4
Solidification temperature is 35 DEG C to 40 DEG C, and polyurethane adhesive 4 has the activity and polarity of height, and the base material containing active hydrogen, such as
The porous materials such as plastics, timber, leather, fabric, paper, ceramics, and the material of any surface finish such as metal, glass, rubber, plastics
Material has excellent chemical adhesive power, and it has, and water-fast, resistance to medium is good, can solidify bonding during 4 normal temperature of polyurethane adhesive,
Adhesion strength is high, and bin stability is high after solidification, and plastic film 5 mutually bonds with metal substrate 3 and improves structural integrity so that
Separation will not be produced during vibration, phenomena such as coming off, the low-temperature setting temperature of polyurethane adhesive 4 is relatively low, even if low-temperature setting is produced
Raw temperature also will not produce heat effect to plastic film 5, and rate of drying is fast, environment friendly and pollution-free, without obvious peculiar smell, make
Wide with scope, construction technology is excellent.
The outer surface of metal substrate 3 is provided with neck 31, and neck 31 is uniformly arranged around the center of circle of metal substrate 3, therewith
Corresponding, the outer surface of plastic film 5 is provided with buckle 51, and buckle 51 and spliced eye 52 surround the center of circle of plastic film 5 respectively
Uniformly arrangement and circular array form, inside, which is provided with multigroup connection outpost of the tax office, ensures that metal substrate 3 is connected surely with plastic film 5
Gu the working condition of geo-stationary, buckle 51 and 31 mutual snapping of neck, plastic foil are also able to maintain that even if by strength vibration
For piece 5 by the 31 mutual clamping of neck of buckle 51 and the outer surface of metal substrate 3, the outer surface of plastic film 5 is additionally provided with peace
Tankage 53, the diameter dimension of mounting groove 53 is corresponding identical with the diameter dimension of metal substrate 3, and metal substrate 3 is installed on plastic foil
In the mounting groove 53 of the side of piece 5, metal substrate 3 is chimeric with the fixation of mounting groove 53, so as to realize metal substrate 3 and plastic film 5
Integration, device appearance is more clean and tidy, comfortable, and the inner bottom surface of mounting groove 53 offers the consistent spliced eye 52 in multigroup aperture, inserts
The side equi-spaced apart that hole 52 is connect in plastic film 5 is set, and spliced eye 52 is internally provided with inserting column 32, and the one of inserting column 32
The inner bottom surface with spliced eye 52 is held to abut that the length dimension of inserting column 32 is corresponding identical with the depth dimensions of spliced eye 52,
Welding is fixed in the bottom surface of the other end metal substrate 3 of inserting column 32, and metal substrate 3 passes through inserting column 32 and the appearance of plastic film 5
The spliced eye 52 in face fixes grafting, and the outside dimension of inserting column 32 is corresponding with the aperture size of spliced eye 52 consistent, inserting column 32
Outer wall and spliced eye 52 inwall it is seamless applying, during installation, metal substrate 3 is just being alignd with plastic film 5, by metal substrate
3 are advanced downwardly from the surface of plastic film 5, and metal substrate 3 is inserted in mounting groove 53, now, the outer ring of metal substrate 3 with
The inner surface of mounting groove 53 is bonded to each other, and the inserting column 32 of the bottom of metal substrate 3 inserts in spliced eye 52 to realize admittedly just
It is fixed, now, by the half height insertion spliced eye 52 of inserting column 32, polyurethane adhesive 4 is applied to metal substrate 3 and modeling
Between expecting diaphragm 5, then by the fully-inserted spliced eye 52 of inserting column 32, now, buckle 51 mutually fastens with neck 31, realizes card
Tightly, you can complete the assembly manipulation of metal substrate 3 and plastic film 5, metal substrate 3 passes through self structure with plastic film 5
Connected mode and Chemical Felter realize dual fixation, more firmly, stably, during high vibration are also at geo-stationary
Working condition, performance is more excellent, and service behaviour is high, benefits from degree height, and disclosure satisfy that in continual for a long time
Working environment, the scope of application are more wide in range.
In summary：Piezoelectricity singing piece after the improvement, apparatus main body selected material, material environmental protection, have very high tough
Property, structural strength is high, and service life is longer, and plastic film 5 is mutually bonded by polyurethane adhesive 4 with metal substrate 3 and improved
Structural integrity, using the substituted metal substrate 3 of plastic film 5 as vibration substrate, cost of goods manufactured is reduced, continuity uses the longevity
Life, and the low-temperature setting temperature of polyurethane adhesive 4 is relatively low, and rate of drying is fast, and adhesion strength is higher, environment friendly and pollution-free,
Without obvious peculiar smell, use range is wide, and construction technology is excellent, and metal substrate 3 is chimeric with the fixation of plastic film 5 and realizes integration,
Device appearance is more clean and tidy, comfortable, the connected mode and Chemical Felter that metal substrate 3 passes through self structure with plastic film 5
Dual fixation is realized, more firmly, stably, during high vibration is also at the working condition of geo-stationary, performance is more
To be excellent, service behaviour is high, benefits from degree height, and disclosure satisfy that the scope of application is more in continual working environment for a long time
To be wide in range.
Although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of changes, modification can be carried out to these embodiments, replace without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (6)
1. the piezoelectricity singing piece after a kind of improvement, including piezoelectric ceramic piece (1), silver paste electricity level (2), metal substrate (3) and poly- ammonia
Ester gum stick (4), it is characterised in that：The outer surface of the piezoelectric ceramic piece (1) is coated with silver paste electricity level (2), silver paste electricity level (2)
Uniform fold is provided with metal substrate (3), Metal Substrate in the both sides of piezoelectric ceramic piece (1), the side of the piezoelectric ceramic piece (1)
The side of piece (3) is fixedly connected with piezoelectric ceramic piece (1), the opposite side of metal substrate (3) be provided with polyurethane adhesive (4) and
Plastic film (5), the polyurethane adhesive (4) are uniformly applied to the joint face of metal substrate (3) and plastic film (5), gather
The both sides of urethane adhesive (4) are tightly bonded with metal substrate (3), plastic film (5) respectively, and the metal substrate (3) passes through
Polyurethane adhesive (4) and the fixed bonding of plastic film (5)；
The outer surface of the metal substrate (3) is provided with neck (31), and neck (31) is uniformly arranged around the center of circle of metal substrate (3)
Cloth, corresponding, the outer surface of the plastic film (5) is provided with buckle (51), and buckle (51) is mutually detained with neck (31)
Connect, the plastic film (5) passes through neck (31) mutual clamping of buckle (51) and the outer surface of metal substrate (3), plastic foil
The outer surface of piece (5) is additionally provided with mounting groove (53), and the inner bottom surface of the mounting groove (53) offers that multigroup aperture is consistent to insert
Hole (52) is connect, spliced eye (52) is set in the side equi-spaced apart of plastic film (5), and spliced eye (52) are internally provided with
Inserting column (32), one end of inserting column (32) and the inner bottom surface of spliced eye (52) abut that the other end of inserting column (32) is golden
Welding is fixed in the bottom surface for belonging to substrate (3), and the metal substrate (3) is inserted by inserting column (32) and plastic film (5) outer surface
Connect hole (52) and fix grafting.
2. the piezoelectricity singing piece after a kind of improvement according to claim 1, it is characterised in that：Silver paste electricity level (2) is logical
Cross the tow sides that typography is covered in piezoelectric ceramic piece (1).
3. the piezoelectricity singing piece after a kind of improvement according to claim 1, it is characterised in that：The plastic film (5) is adopted
With PET material, metal substrate (3) uses latten(-tin).
4. the piezoelectricity singing piece after a kind of improvement according to claim 1, it is characterised in that：The piezoelectric ceramic piece (1),
Metal substrate (3), polyurethane adhesive (4) are arranged in order and closely coupled with plastic film (5), do not produce seam between each other
Gap, piezoelectric ceramic piece (1), the center of circle of plastic film (5) and metal substrate (3) are correspondingly arranged in the same horizontal line.
5. the piezoelectricity singing piece after a kind of improvement according to claim 1, it is characterised in that：The buckle (51) and grafting
Hole (52) is uniformly arranged around the center of circle of plastic film (5) respectively and circular array form.
6. the piezoelectricity singing piece after a kind of improvement according to claim 1, it is characterised in that：Outside the inserting column (32)
Footpath size is corresponding consistent with the aperture size of spliced eye (52), the outer wall of inserting column (32) and the inwall seamless paste of spliced eye (52)
Close, the diameter dimension of mounting groove (53) is corresponding identical with the diameter dimension of metal substrate (3), and metal substrate (3) is installed on plastics
In the mounting groove (53) of diaphragm (5) side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711158749.9A CN107767852A (en) | 2017-11-20 | 2017-11-20 | A kind of piezoelectricity singing piece after improvement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711158749.9A CN107767852A (en) | 2017-11-20 | 2017-11-20 | A kind of piezoelectricity singing piece after improvement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107767852A true CN107767852A (en) | 2018-03-06 |
Family
ID=61278443
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711158749.9A Pending CN107767852A (en) | 2017-11-20 | 2017-11-20 | A kind of piezoelectricity singing piece after improvement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107767852A (en) |
-
2017
- 2017-11-20 CN CN201711158749.9A patent/CN107767852A/en active Pending
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|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180306 |
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| WD01 | Invention patent application deemed withdrawn after publication |