CN105376681B - A kind of planar coil drive-type film-type loud speaker - Google Patents
A kind of planar coil drive-type film-type loud speaker Download PDFInfo
- Publication number
- CN105376681B CN105376681B CN201510831552.1A CN201510831552A CN105376681B CN 105376681 B CN105376681 B CN 105376681B CN 201510831552 A CN201510831552 A CN 201510831552A CN 105376681 B CN105376681 B CN 105376681B
- Authority
- CN
- China
- Prior art keywords
- film
- type
- loud speaker
- silicon chip
- magnetostriction effect
- Prior art date
- 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.)
- Expired - Fee Related
Links
Abstract
The invention discloses a kind of planar coil drive-type film-type loud speakers, belong to electroacoustic transducer technical field.Planar spiral winding (1) including being set on shell (12) upper surface, the coil electrode being connect with planar spiral winding is to lead (5) and close embedded silicon chip (4) inside the shell；Counter magnetostriction effect film (3) is coated with embedded with permanent magnetism annulus (6), silicon chip upper surface inside silicon chip, lower surface is coated with direct magnetostriction effect film (10)；Silicon chip is connect by coupler (9) with sound film (7), and coupler is vertically through the guide ring (11) in shell.The frequency response of this planar coil drive-type film-type loud speaker is fast, energy transmission density is high, load capacity is strong, should become larger, and can significantly improve stability, sensitivity, fidelity and the sound quality of loud speaker；Significantly reduce the volume of loud speaker simultaneously, convenient for integrated and；Have good dielectric properties and high-frequency insulation, stable work in work.
Description
Technical field
The present invention relates to a kind of loud speaker, specifically a kind of planar coil drive-type film-type loud speaker belongs to electroacoustic and changes
It can device technical field.
Background technology
With the fast development of electroacoustic techniques, loud speaker is as the core element in high-fidelity electroacoustics system, extensively
Be applied to video display broadcast and the numerous areas such as interconnected communication.The operation principle of loud speaker is a kind of the transformation of AC audio signal
For the energy transducer of acoustical signal, the good and bad influence to sound quality of performance is very big.It can be loud speaker by the difference of type of drive
It is divided into electromagnetic type, moving-coil type, electrostatic and piezoelectric type.
But in the prior art at present, electromagnetic type needs specific field generating unit, and volume is larger, it is difficult in more matchmakers
It is realized in body high-fidelity electroacoustics system integrated；Requirement of the electrostatic drive formula to voltage is higher, it is difficult to realize custom circuit control
System；There is phenomena such as drift and electrical breakdown in driving type piezoelectric actuator, be restricted its application.Planar coil drive-type film-type is raised one's voice
The executive component of device uses giant magnetostrictive thin film, has driving frequency height, fast response time, should become larger, energy transmission density
High excellent properties；It is driven by planar spiral winding, effectively reduces the volume of loud speaker.Therefore the present invention
With frequency response it is high, it is small, be easy to micromation, the advantageous features such as sound quality is good, convenient for integrated and stable work in work.
Invention content
In view of the above existing problems in the prior art, the present invention provides a kind of planar coil drive-type film-type loud speaker,
With driving frequency height, fast response time, should become larger, the excellent properties that energy transmission density is high, sound quality is good；Significant reduce is raised
The volume of sound device；Convenient for integrated and stable work in work.
To achieve these goals, this planar coil drive-type film-type loud speaker includes the plane set on shell upper surface
Spiral winding, with the coil electrode that the planar spiral winding is connect to lead and close embedded silicon chip inside the shell；
The inside of the silicon chip is embedded with permanent magnetism annulus, and it is thin that the upper surface of the silicon chip is coated with counter magnetostriction effect
Film, lower surface are coated with direct magnetostriction effect film；
The silicon chip is connect by coupler with sound film, and the coupler is vertically through the guide ring in shell.
Further, the planar spiral winding passes through silicon substrate fine process and microelectroforming technology deposited seed layer copper
Into coated with insulating protective layer on the planar spiral winding.
Further, the counter magnetostriction effect film is SmFe alloys, and the direct magnetostriction effect thin-film material is
TbDyFe alloys, the counter magnetostriction effect film are equipped with two panels with direct magnetostriction effect film, pass through radio frequency magnetron
Sputtering method is plated in the both side surface of the silicon chip.
Further, between the counter magnetostriction effect film and direct magnetostriction effect film and shell and guide ring
There are gaps.
Further, the permanent magnetism annulus is embedded in the inside of silicon chip by micro-electromechanical processing technology.
Further, the silicon chip is made of the disc silicon sheet with high-tension material.
Further, the sound film is made of the polypropylene material of good tensile yield degree, is set in the lower section of the sound film
There is dust cover.
Further, the shell is made up of glass-silicon-glass of bonding technology.
Compared with prior art, this planar coil drive-type film-type loud speaker has the advantages that：
1st, the present invention is compared with existing loud speaker, by the use of giant magnetostrictive thin film as executive component, have frequency response soon,
Energy transmission density is high, load capacity is strong, the features such as should becoming larger, thus can significantly improve loud speaker stability sensitivity,
The working performances such as fidelity, sound quality；
2nd, the present invention using planar spiral winding as driving element, it is not only simple in structure but also can significantly reduce
The volume of loud speaker is easy to implement integrated with multimedia hardware system；
3rd, the present invention using polypropylene as sound membrane material, other than tensile strength height, be also equipped with good dielectric properties with
High-frequency insulation can effectively improve the job stability of loud speaker.
Description of the drawings
Fig. 1 is the agent structure schematic diagram of the present invention；
Fig. 2 is the stereochemical structure decomposing schematic representation of the present invention；
In figure：1st, planar spiral winding, 2, insulating protective layer, 3, counter magnetostriction effect film, 4, silicon chip, 5, coil
Electrode is to lead, and 6, permanent magnetism annulus, 7, sound film, 8, dust cover, 9, coupler, 10, direct magnetostriction effect film, 11, be oriented to
Ring, 12, shell.
Specific embodiment
The present invention will be further described below in conjunction with the accompanying drawings.
As depicted in figs. 1 and 2, this planar coil drive-type film-type loud speaker includes the plane set on 12 upper surface of shell
Spiral winding 1, with the coil electrode that the planar spiral winding 1 is connect to lead 5 and the close silicon being embedded in shell 12
Substrate 4；
The inside of the silicon chip 4 is embedded with permanent magnetism annulus 6, and the upper surface of the silicon chip 4 is coated with counter magnetostriction effect
Film 3, lower surface are coated with direct magnetostriction effect film 10；
The silicon chip 4 is connect by coupler 9 with sound film 7, and the coupler 9 is vertically through leading in shell 12
To ring 11.
The permanent magnetism annulus 6 generates constant bias magnetic field, can not only effectively avoid " frequency-doubled effect ", and can be with
Counter magnetostriction effect film 3 and the coefficient of dilatation of direct magnetostriction effect film 10 is made to be within the preferable range of linearity.
When being passed through AC audio electric current to planar spiral winding 1, planar spiral winding 1 can generate the magnetic field of alternation, converse magnetostriction
Effect film 3 can change with direct magnetostriction effect film 10 in the magnetic field of alternation to be bent, so as to which silicon chip be made to shake about 4
It is dynamic, while sound film 7 is driven to vibrate.
Further, the planar spiral winding 1 passes through silicon substrate fine process and microelectroforming technology deposited seed layer copper
It is made, insulating protective layer 2 is coated on the planar spiral winding 1.Coil electrode is pierced by lead 5 from insulating protective layer 2,
Insulating protective layer 2 can effective protection planar spiral winding 1 it is not exposed in air and occur being aoxidized, the failures such as corrosion show
As.
Further, the counter magnetostriction effect film 3 be SmFe alloys, 10 material of direct magnetostriction effect film
For TbDyFe alloys, the counter magnetostriction effect film 3 is equipped with two panels with direct magnetostriction effect film 10, passes through radio frequency
Magnetron sputtering method is plated in the both side surface of the silicon chip 4.SmFe alloys and TbDyFe alloys are giant magnetostrictive material,
Have the characteristics that energy transmission density height, fast response time, driving frequency are high, load capacity is strong and should become larger.
Further, the counter magnetostriction effect film 3 and direct magnetostriction effect film 10 and shell 12 and guide ring
There are gaps between 11.The magnetic field that the planar spiral winding 1 on shell 12 generates can be effectively reduced to stretch in inverse mangneto
Magnetic field in the axial direction of contracting effect film 3 and direct magnetostriction effect film 10 influences.
Further, the permanent magnetism annulus 6 is embedded in the inside of silicon chip 4 by micro-electromechanical processing technology.
Further, the silicon chip 4 is made of the disc silicon sheet with high-tension material.
Further, the sound film 7 is made of the polypropylene material of good tensile yield degree, is set in the lower section of the sound film 7
It is equipped with dust cover 8.It ensure that sound film 7 itself has the performance of preferable vibration and quick response in high frequency, while using anti-
Dust hood 8 can play protective action to sound film 7.
Further, the shell 12 is made up of glass-silicon-glass of bonding technology.
The concrete operating principle of this planar coil drive-type film-type loud speaker is as follows：
Permanent magnetism annulus 6 generates constant bias magnetic field, counter magnetostriction effect film 3 and direct magnetostriction effect film 10
The with good stability and working characteristics under the action of the bias magnetic field.When being passed through size variation to planar spiral winding 1
AC audio electric current when, planar spiral winding 1 generates the alternation of magnitude of field intensity variation under the action of the electric current
Magnetic field, when alternating magnetic field is when forward direction increases, direct magnetostriction effect film 10 gradually extends under its effect, converse magnetostriction
Effect film 3 is gradually shortened, and is bent downwardly silicon chip 4, and the vibration downwards of sound film 7 is driven by coupler 9；When alternating magnetic field just
To when being gradually decreased as zero and continuing to inversely increase, direct magnetostriction effect film 10 is gradually shortened under its magnetic fields, inverse
Magnetostrictive effect film 3 gradually extends, and silicon chip 4 is made gradually to restore former long and is bent upwards, sound film is driven by coupler 9
7 vibrations upwards.
Constantly change with the size of AC audio electric current, the field strength direction of the alternating magnetic field of generation and size are also continuous
Variation so as to which silicon chip 4 be made to drive the continuous vibration about 7 of sound film, realizes the sounding of loud speaker.The frequency of AC audio electric current
With it is of different sizes, sound film 7 vibrate frequency and amplitude it is also different.Using the counter magnetostriction effect film of giant magnetostrictive material
3 with direct magnetostriction effect film 10 have energy transmission density height, fast response time, driving frequency be high, load capacity by force and
The features such as should becoming larger, can realize the vibration in high frequency of sound film 7 and quick response, improve sound quality and the fidelity of loud speaker,
It is integrated suitable for being realized multimedia high-fidelity electroacoustics system.
In conclusion the frequency response of this planar coil drive-type film-type loud speaker is fast, energy transmission density is high, load capacity
By force, it should become larger, stability, sensitivity, fidelity and the sound quality of loud speaker can be significantly improved；Significantly reduce loud speaker simultaneously
Volume, convenient for integrated and；Have good dielectric properties and high-frequency insulation, stable work in work.
Claims (7)
1. a kind of planar coil drive-type film-type loud speaker, which is characterized in that
Planar spiral winding (1) including being set on shell (12) upper surface, the coil electricity being connect with the planar spiral winding (1)
Extremely to lead (5) and the silicon chip (4) being closely embedded in shell (12)；
The inside of the silicon chip (4) is embedded with permanent magnetism annulus (6), and the upper surface of the silicon chip (4) is coated with converse magnetostriction effect
Film (3) is answered, lower surface is coated with direct magnetostriction effect film (10)；
The silicon chip (4) is connect by coupler (9) with sound film (7), and the coupler (9) is vertically through set on shell (12)
Interior guide ring (11)；
The counter magnetostriction effect film (3) and direct magnetostriction effect film (10) and shell (12) and guide ring (11) it
Between there are gaps.
2. a kind of planar coil drive-type film-type loud speaker according to claim 1, which is characterized in that
The planar spiral winding (1) is by silicon substrate fine process and microelectroforming technology deposited seed layer copper into described
Insulating protective layer (2) is coated on planar spiral winding (1).
3. a kind of planar coil drive-type film-type loud speaker according to claim 1, which is characterized in that
The counter magnetostriction effect film (3) is SmFe alloys, and direct magnetostriction effect film (10) material is
TbDyFe alloys, the counter magnetostriction effect film (3) is equipped with two panels with direct magnetostriction effect film (10), described inverse
Magnetostrictive effect film (3) is plated on by radio-frequency magnetron sputter method on the upper surface of the silicon chip (4), and the positive mangneto is stretched
Contracting effect film (10) is plated on by radio-frequency magnetron sputter method on the lower surface of the silicon chip (4).
4. a kind of planar coil drive-type film-type loud speaker according to claim 1, which is characterized in that
The permanent magnetism annulus (6) is embedded in the inside of silicon chip (4) by micro-electromechanical processing technology.
5. a kind of planar coil drive-type film-type loud speaker according to claim 1, which is characterized in that
The silicon chip (4) is made of the disc silicon sheet with high-tension material.
6. a kind of planar coil drive-type film-type loud speaker according to claim 1, which is characterized in that
The sound film (7) is made of the polypropylene material with good tensile yield degree, is provided with below the sound film (7)
Dust cover (8).
7. a kind of planar coil drive-type film-type loud speaker according to claim 1, which is characterized in that
The shell (12) is made up of glass-silicon-glass of bonding technology.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510831552.1A CN105376681B (en) | 2015-11-24 | 2015-11-24 | A kind of planar coil drive-type film-type loud speaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510831552.1A CN105376681B (en) | 2015-11-24 | 2015-11-24 | A kind of planar coil drive-type film-type loud speaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105376681A CN105376681A (en) | 2016-03-02 |
| CN105376681B true CN105376681B (en) | 2018-06-12 |
Family
ID=55378409
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510831552.1A Expired - Fee Related CN105376681B (en) | 2015-11-24 | 2015-11-24 | A kind of planar coil drive-type film-type loud speaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105376681B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103152679A (en) * | 2013-03-14 | 2013-06-12 | 胡宗科 | Electromagnetism transient magnetic loudspeaker |
| CN204272378U (en) * | 2014-12-30 | 2015-04-15 | 安徽理工大学电子设备厂 | A kind of loud speaker based on giant magnetostrictive thin film |
| CN204442684U (en) * | 2015-03-24 | 2015-07-01 | 安徽理工大学 | A kind of giant magnetostrictive thin film sound transducer |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4758133B2 (en) * | 2005-04-28 | 2011-08-24 | フォスター電機株式会社 | Giant magnetostrictive speaker |
-
2015
- 2015-11-24 CN CN201510831552.1A patent/CN105376681B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103152679A (en) * | 2013-03-14 | 2013-06-12 | 胡宗科 | Electromagnetism transient magnetic loudspeaker |
| CN204272378U (en) * | 2014-12-30 | 2015-04-15 | 安徽理工大学电子设备厂 | A kind of loud speaker based on giant magnetostrictive thin film |
| CN204442684U (en) * | 2015-03-24 | 2015-07-01 | 安徽理工大学 | A kind of giant magnetostrictive thin film sound transducer |
Non-Patent Citations (1)
| Title |
|---|
| "基于双平面线圈驱动的GMM薄膜微泵";寇旗旗等，;《液压与气动》;20141115(第11期);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105376681A (en) | 2016-03-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101778327B (en) | Electricity and sound conversion method and device | |
| CN105657625A (en) | Electroacoustic transducer | |
| KR20210041026A (en) | Multi engine array system and speakers | |
| WO2022068081A1 (en) | Sound generator, and electronic product comprising same | |
| CN103281658B (en) | Magnetic moves loud speaker | |
| WO2013099512A1 (en) | Vibration device, sound generator, speaker system, and electronic device | |
| US8913767B2 (en) | Electro-acoustic transducer, electronic apparatus, electro-acoustic conversion method, and sound wave output method of electronic apparatus | |
| TW201642671A (en) | Speaker | |
| US20130163807A1 (en) | Electro-acoustic transducer and method of manufacturing the same | |
| JPH024559Y2 (en) | ||
| WO2022046419A1 (en) | Flat speaker driven by a single permanent magnet and one or more voice coils | |
| JPWO2013099511A1 (en) | Vibration device, sound generator, speaker system, electronic equipment | |
| CN105376681B (en) | A kind of planar coil drive-type film-type loud speaker | |
| CN109451403B (en) | Vibration diaphragm structure of transducer of miniature flat-panel loudspeaker and loudspeaker with vibration diaphragm of transducer | |
| WO2017002573A1 (en) | Electro-acoustic converter | |
| US20140376759A1 (en) | Loudspeaker having carbon nanotubes | |
| US9402135B1 (en) | Magnetostrictive parametric transducer | |
| CN209250879U (en) | The compound electroacoustic transducer of moving-coil electrostatic | |
| US20160219373A1 (en) | Piezoelectric Speaker Driver | |
| CN206136273U (en) | Moving -coil loudspeaker | |
| CN206196042U (en) | Moving -coil loudspeaker | |
| CN105228065A (en) | There is the wafer speaker of good acoustical quality | |
| CN109660925B (en) | Electroacoustic transducer and moving coil static composite loudspeaker | |
| CN203883988U (en) | Ultra-thin type loudspeaker | |
| CN103024650A (en) | Giant magnetostrictive rare-earth transducer for parametric loudspeaker |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180612 Termination date: 20201124 |