CN110087175A - A kind of electrostatic loudspeaker stator plate and electrostatic loudspeaker - Google Patents
A kind of electrostatic loudspeaker stator plate and electrostatic loudspeaker Download PDFInfo
- Publication number
- CN110087175A CN110087175A CN201910306830.XA CN201910306830A CN110087175A CN 110087175 A CN110087175 A CN 110087175A CN 201910306830 A CN201910306830 A CN 201910306830A CN 110087175 A CN110087175 A CN 110087175A
- Authority
- CN
- China
- Prior art keywords
- electrostatic loudspeaker
- stator plate
- plate according
- conductive grid
- grid structure
- 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.)
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R19/00—Electrostatic transducers
- H04R19/04—Microphones
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2201/00—Details of transducers, loudspeakers or microphones covered by H04R1/00 but not provided for in any of its subgroups
- H04R2201/003—Mems transducers or their use
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
Abstract
The present invention relates to a kind of electrostatic loudspeaker stator plates, comprising: pole plate main body and frame；Pole plate main body is conductive grid structure, and the entity size that conductive grid structure is parallel to pole plate direction is less than or equal to c/2 π fmin, wherein c is acoustic speed, fminFor the minimum output audio of loudspeaker；Frame is connect with pole plate main body.The present invention can improve the reduction degree of electrostatic loudspeaker sound wave, be effectively improved sound field.
Description
Technical field
The present invention relates to speaker technology field more particularly to a kind of electrostatic loudspeaker stator plates and electrostatic loudspeaker.
Background technique
Electroacoustic loud speaker is classified in a driving manner at present can be roughly divided into such as magnetic type loudspeaker, coil-moving speaker, piezoelectricity
Formula loudspeaker and electrostatic loudspeaker.
Wherein electrostatic loudspeaker has gossamery vibrating diaphragm, is polarized by High Level DC Voltage, and the required electric energy that polarizes is by exchanging
Electrotransformation also has and to be battery powered.Vibrating diaphragm is suspended in the electrostatic field formed by two pieces of fixed metal plates (stator), works as sound
When frequency signal is downloaded on stator, electrostatic field changes, and drives diaphragm oscillations.Single stator is also that can drive vibrating diaphragm, but double
Stator recommend form distortion it is smaller.Audio signal is converted hundreds of volts by the special amplifier that electrostatic loudspeaker must use
Voltage signal, by power amplifier output end connect transformer method can also drive electrostatic loudspeaker, this
Scheme is widely adopted on the electrostatic loudspeaker of the 1960s and 1970s, it be to electrostatic loudspeaker amplifier valuableness at
The level of the electrostatic loudspeaker amplifier specially designed is not achieved in this compromise, signal quality.Electrostatic loudspeaker precise structure,
To material requirements height, and mostly, hand assembled is debugged, therefore expensive.Electrostatic loudspeaker is usually considered to be used to provide height
The audio reproduction of quality is mainly used in advanced loudspeaker and speaker.The action principle of conventional electrostatic formula loudspeaker is by two
There is piece the pole plate of aperture and fixation to generally use pcb plate, metal plate, the metal plate with insulating layer) seize conductive vibrating diaphragm shape on both sides by the arms
Occurred by supplying vibrating diaphragm Dc bias and giving the alternating voltage of two electrode audios using positive negative electric field at capacitor
Electrostatic force, drive diaphragm oscillations simultaneously acoustic radiating is gone out.For the oscillating mass for reducing vibrating diaphragm, the structure of vibrating diaphragm is mostly used greatly
Insulation film, and one layer of very thin electrical conductivity coating is plated on the surface layer of insulation film, such as metal, semiconductor.
Electrostatic loudspeaker is easy to damage when being in humidity or the biggish environment of dust, maintenance trouble, whole system volume
Weight is all very big, it has not been convenient to carry；Since the distance between its stator plate and vibrating diaphragm is limited, the stroke limiting of vibrating diaphragm；Although fixed
There is the hole propagated convenient for audio in sub-pole plate, but low-frequency range is by the phase of conventional pcb board, metal plate, metal plate with insulating layer
Random wave action is distorted larger.
Summary of the invention
The purpose of the present invention is for the disadvantage on prior art construction, propose a kind of electrostatic loudspeaker stator plate and quiet
Electric loudspeaker solves the problems, such as etc. that bass effect difference and sound field are chaotic in electrostatic loudspeakers.
The embodiment of the present invention provides a kind of electrostatic loudspeaker stator plate, comprising: pole plate main body and frame；Pole plate main body is
Conductive grid structure, the entity size that conductive grid structure is parallel to pole plate direction are less than or equal to c/2 π fmin, wherein c is sound wave
Speed, fminFor the minimum output audio of loudspeaker；Frame is connect with pole plate main body.
Preferably, the entity size that conductive grid structure is parallel to pole plate direction is less than or equal to 100 μm and is more than or equal to 10 μ
m。
Preferably, conductive grid structure is made of the braiding of a plurality of conductor wire.Form of presentation is longitude and latitude weaving mode.
Preferably, conductive grid structure is by conductive plate by being cut into.Cutting mode is precise laser cutting.
Preferably, frame includes the support portion connecting with conductive grid structure periphery and positioned at conductive grid structure lower part
Reinforcing rib.Preferably, the size of the thickness of support portion and reinforcing rib is less than or equal to 1mm.Preferably, reinforcing rib includes hollow ring
Muscle.Preferably, support portion includes multiple card slots.
Preferably, conductive grid is made of metal or alloy, and frame is made of alloy.Metal includes silver, copper or aluminium.Alloy
Including conductive copper alloy and cond aluminium.
The embodiment of the present invention also provides a kind of electrostatic loudspeaker, comprising: vibrating diaphragm and two stator plates, vibrating diaphragm are located at two
Between a stator plate, stator plate is any one of the above electrostatic loudspeaker stator plate.
Compared with prior art, the beneficial effect of the embodiment of the present invention is: using network by stator plate, improves
The reduction degree of electrostatic loudspeaker sound wave, is effectively improved sound field.
The above description is only an overview of the technical scheme of the present invention, in order to better understand the technical means of the present invention,
And can be implemented in accordance with the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention and the accompanying drawings.
Detailed description of the invention
By the description carried out with reference to the accompanying drawing to its exemplary embodiment, features described above and advantage of the present invention will become
It obtains more clear and is readily appreciated that.
Fig. 1 is a kind of structural schematic diagram of electrostatic loudspeaker stator plate of the embodiment of the present invention 1.
Fig. 2 is a kind of structural schematic diagram of stator plate frame of the embodiment of the present invention 1.
Fig. 3 is a kind of structural schematic diagram of electrostatic loudspeaker of the embodiment of the present invention 1.
Specific embodiment
This specification technical solution is described in detail below by attached drawing and specific embodiment, it should be understood that this theory
Specific features in bright book embodiment and embodiment are the detailed description to this specification technical solution, rather than to this theory
The restriction of bright book technical solution, in the absence of conflict, technical characteristic in this specification embodiment and embodiment can be with
It is combined with each other.
The terms "and/or", only a kind of incidence relation for describing affiliated partner, indicates that there may be three kinds of passes
System, for example, A and/or B, can indicate: individualism A exists simultaneously A and B, these three situations of individualism B.In addition, herein
Middle character "/" typicallys represent the relationship that forward-backward correlation object is a kind of "or".
Referring to Fig. 1, electrostatic loudspeaker stator plate 100 of the invention, comprising: pole plate main body 110 and frame 120；Pole plate
Main body 110 is conductive grid structure,；Frame 120 is connect with pole plate main body 110.Conductive grid structure is parallel to pole plate direction
Entity size is less than or equal to c/2 π fmin, wherein c is acoustic speed (generally 340m/s), fminFor the minimum output sound of loudspeaker
Wherein c is acoustic speed to frequency.When the size of conductive grid structure meets above-mentioned condition, the low-frequency sound wave of diaphragm of loudspeaker generation
Acoustic wave diffraction occurs at conductive grid structure, forms more complete sound field, the magnets loudspeaking such as raising around conductive grid structure
The sound effect of the low-frequency sound wave of device.The audio range of loudspeaker output is usually 20Hz-20KHz, and conductive grid structure is parallel
In pole plate direction entity size range of choice be 10-100 μm.To adapt to wider range of purposes, the selection model of entity size
Enclosing is 40-70 μm, is needed with being suitable for the propagation of sensitive sound wave.
Conductive grid structure is worked out in a manner of longitude and latitude weaving by a plurality of conductor wire.Conductive grid structure is by conduction
Thin plate is by being cut into, such as precise laser cutting.Conductive grid is made of metal or alloy, and metal, which can be selected, to be had well
The silver of electric conductivity and ductility, copper or aluminium, alloy can be using conductive copper alloys and cond aluminium with satisfactory electrical conductivity.
Referring to fig. 2, frame 120 include the support portion 121 being connect with conductive grid structure periphery and be located at conductive grid knot
The reinforcing rib 122 of structure lower part.The thickness of support portion 121 and the size of reinforcing rib 122 are less than or equal to 1mm.Reinforcing rib includes hollow
Circular bar avoids intermediate region from blocking the life field defect of generation.Support portion 121 includes multiple card slots 123, is convenient for stator plate
Installation and removal.120 alloy of frame is made, and alloy can adjust electrical conductive copper alloy and conductive aluminum to close using with good
Gold.
The present embodiment uses network by stator plate, improves the reduction degree of electrostatic loudspeaker sound wave, is effectively improved
Sound field.
Referring to Fig. 3, electrostatic loudspeaker 300 of the invention, comprising: vibrating diaphragm 310 and two stator plates 320, vibrating diaphragm 310
Between two stator plates 320.Stator plate 320 includes: pole plate main body and frame；Pole plate main body is conductive grid structure；
Frame is connect with pole plate main body.The entity size that conductive grid structure is parallel to pole plate direction is less than or equal to c/2 π fmin, wherein c
For acoustic speed (generally 340m/s), fminFor the minimum output audio of loudspeaker, wherein c is acoustic speed.Work as conductive grid
When the size of structure meets above-mentioned condition, sound wave occurs at conductive grid structure and spreads out for the low-frequency sound wave that the diaphragm of loudspeaker generates
It penetrates, forms more complete sound field, the sound effect of the low-frequency sound wave of magnet loudspeakers such as raising around conductive grid structure.Loudspeaking
The audio range of device output is usually 20Hz-20KHz, and conductive grid structure is parallel to the selection model of the entity size in pole plate direction
Enclose is 10-100 μm.To adapt to wider range of purposes, the range of choice of entity size is 40-70 μm, to be suitable for sensitive sound
The propagation of wave needs.
Conductive grid structure is worked out in a manner of longitude and latitude weaving by a plurality of conductor wire.Conductive grid structure is by conduction
Thin plate is by being cut into, such as precise laser cutting.Conductive grid is made of metal or alloy, and metal, which can be selected, to be had well
The silver of electric conductivity and ductility, copper or aluminium, alloy can be using conductive copper alloys and cond aluminium with satisfactory electrical conductivity.
The present embodiment uses network by stator plate, improves the reduction degree of electrostatic loudspeaker sound wave, is effectively improved
Sound field.
Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic
Property concept, then additional changes and modifications may be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as
It selects embodiment and falls into all change and modification of this specification range.Obviously, those skilled in the art can be to this hair
It is bright to carry out various modification and variations without departing from the spirit and scope of the present invention.If in this way, these modifications of the invention and change
Within the scope of the claims of the present invention and its equivalent technology, then the present invention is also intended to encompass these modification and variations and exists type
It is interior.
Claims (15)
1. a kind of electrostatic loudspeaker stator plate, comprising: pole plate main body and frame；The pole plate main body is conductive grid structure,
The entity size that the conductive grid structure is parallel to pole plate direction is less than or equal to c/2 π fmin, wherein c is acoustic speed, fminFor
The minimum output audio of loudspeaker；The frame is connect with the pole plate main body.
2. electrostatic loudspeaker stator plate according to claim 1, it is characterised in that: the conductive grid structure is parallel to
The entity size in pole plate direction is less than or equal to 100 μm and is more than or equal to 10 μm.
3. electrostatic loudspeaker stator plate according to claim 2, it is characterised in that: the conductive grid structure is by a plurality of
Conductor wire braiding is made.
4. electrostatic loudspeaker stator plate according to claim 3, it is characterised in that: the form of presentation interlocks for longitude and latitude
Weaving manner.
5. electrostatic loudspeaker stator plate according to claim 3, it is characterised in that: the conductive grid structure is by conduction
Thin plate is by being cut into.
6. electrostatic loudspeaker stator plate according to claim 6, it is characterised in that: the cutting mode is precise laser
Cutting.
7. electrostatic loudspeaker stator plate according to claim 1, it is characterised in that: the frame includes and the conduction
The support portion that network periphery connects and the reinforcing rib positioned at the conductive grid structure lower part.
8. electrostatic loudspeaker stator plate according to claim 7, it is characterised in that: the thickness of the support portion and described
The size of reinforcing rib is less than or equal to 1mm.
9. electrostatic loudspeaker stator plate according to claim 7, it is characterised in that: the reinforcing rib includes hollow ring
Muscle.
10. electrostatic loudspeaker stator plate according to claim 7, it is characterised in that: the support portion includes multiple cards
Slot.
11. electrostatic loudspeaker stator plate according to claim 1, it is characterised in that: the conductive grid by metal or
Alloy is made.
12. electrostatic loudspeaker stator plate according to claim 1, it is characterised in that: the frame is made of alloy.
13. electrostatic loudspeaker stator plate according to claim 12, it is characterised in that: the metal include silver, copper or
Aluminium.
14. electrostatic loudspeaker stator plate according to claim 12 or 13, it is characterised in that: the alloy includes conduction
Copper alloy and cond aluminium.
15. a kind of electrostatic loudspeaker, comprising: vibrating diaphragm and two stator plates, the vibrating diaphragm be located at described two stator plates it
Between, the stator plate is electrostatic loudspeaker stator plate described in claim 1-14 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910306830.XA CN110087175A (en) | 2019-04-17 | 2019-04-17 | A kind of electrostatic loudspeaker stator plate and electrostatic loudspeaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910306830.XA CN110087175A (en) | 2019-04-17 | 2019-04-17 | A kind of electrostatic loudspeaker stator plate and electrostatic loudspeaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110087175A true CN110087175A (en) | 2019-08-02 |
Family
ID=67415355
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910306830.XA Pending CN110087175A (en) | 2019-04-17 | 2019-04-17 | A kind of electrostatic loudspeaker stator plate and electrostatic loudspeaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110087175A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111953228A (en) * | 2020-08-13 | 2020-11-17 | 中国工程物理研究院电子工程研究所 | Beam-free traveling wave motor micro-driver |
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| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20200806 Address after: 221000 Room 202, unit 3, building 5, JINDA Garden community, Quanzhan District, Xuzhou City, Jiangsu Province Applicant after: Bian Yaping Address before: Block B-824, No. 5 Lanyuan Road, Huayuan Industrial Park, Tianjin Binhai New Area, 300450 Applicant before: HIFIMAN (TIANJIN) TECHNOLOGY Co.,Ltd. |
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Application publication date: 20190802 |