CN102026072A - Moving iron type low frequency acoustic generator - Google Patents
Moving iron type low frequency acoustic generator Download PDFInfo
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- CN102026072A CN102026072A CN2010105609624A CN201010560962A CN102026072A CN 102026072 A CN102026072 A CN 102026072A CN 2010105609624 A CN2010105609624 A CN 2010105609624A CN 201010560962 A CN201010560962 A CN 201010560962A CN 102026072 A CN102026072 A CN 102026072A
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Abstract
The invention discloses a moving iron type low frequency acoustic generator, comprising a basin rack, a supporter, a gasket, a quality sheet, a magnetic cup, a sound film, a front cover, a magnetic steel, a plywood, a printed circuit board, a voice coil and a rear cover, wherein the magnetic cup, the magnetic steel and the plywood form a constant magnetic circuit system, the constant magnetic circuit system and the supporter forms a vibratory magnetic circuit system; the supporter and the basin rack are subjected to integrated injection moulding in a structural manner of embedded part, the gasket is arranged between the quality sheet and the supporter, the edge of the sound film is fixed on the basin rack and the center of the sound film is connected with the vibratory magnetic circuit system, the front cover is arranged outside the sound film, a magnetic gap is formed between the magnetic cup and the plywood, the printed circuit board is fixed on the basic rack, one end of the voice coil is fixed on the rear cover, and the other end of the voice coil is inserted into the magnetic gap of the constant magnetic circuit system. The moving iron type low frequency acoustic generator of the invention with small volume can mainly be applied to some products which requires relatively low frequency but not large volume, such as portable fetal sound receiver, thus the fetal sound detected by the portable fetal sound receiver can be played.
Description
Technical field
What the present invention relates to is the small and exquisite low-frequency audible signal device of a kind of volume, particularly a kind of moving-iron type low-frequency audible signal device.
Background technology
Present traditional electrodynamic type woofer, its constant magnetic circuit is fixed, by driving the vibrating diaphragm sounding at the voice coil loudspeaker voice coil of axis direction vibration, if send the sound of lower frequency, it is bigger that its vibrating diaphragm just need be done, usually all more than 150mm, can not be used in need pocket, on the product that carries easily.
Summary of the invention
It is little and can send the moving-iron type low-frequency audible signal device of lower frequency sounds that a kind of volume of providing for the deficiency that solves above-mentioned technology is provided.
In order to achieve the above object, a kind of moving-iron type low-frequency audible signal device of the present invention's design, it comprises basin frame, a sheet, pad, quality sheet, magnetic cup, sound film, protecgulum, magnet steel, clamping plate, printed board, voice coil loudspeaker voice coil and bonnet, its feature magnetic cup, magnet steel and clamping plate constitute constant magnetic circuit system, and a constant magnetic circuit system and a sheet constitute the vibration magnetic circuit system; Prop up sheet and adopt insert structure form and the moulding of basin frame integrated through injection molding, described sheet is that elasticity is propped up sheet, for constant magnetic circuit system provides the elasticity support, this sheet provides centering and supporting role to the vibration magnetic circuit system, the radially application of constrained vibration magnetic circuit system on the one hand allows the axis direction vibration of vibration magnetic circuit system in regulation on the other hand.Pad is located between a quality sheet and the sheet, and a quality sheet and a sheet are separated, and prevents that a sheet and quality sheet from producing movement interference.The edge of sound film is fixed on the basin frame, and its center links to each other with the vibration magnetic circuit system, and acoustic irradiation is come out.Protecgulum is located at outside the sound film, and the effect of protection is provided for the sound film.The material of the adoptable neodymium iron boron of this magnet steel is for constant magnetic circuit system provides magnetic energy.Magnetic cup and clamping plate provide magnetism guiding access for magnet steel, and form magnetic gap together, and printed board is fixed on the basin frame, are electrically connected for voice coil loudspeaker voice coil and external circuit provide.Voice coil loudspeaker voice coil one end is fixed on the bonnet, and the other end is inserted in the magnetic gap of constant magnetic circuit system.When having electric current to pass through in the voice coil loudspeaker voice coil, the vibration magnetic circuit system vibrates thereby produce by electromagnetic induction.Bonnet both provided protection for the vibration magnetic circuit system, was used for fixing voice coil loudspeaker voice coil again.Present embodiment has designed 20 millimeters of diameters, and high 6 millimeters basin frame is for vibrational system provides support.
The present invention is connected with one sheet constant magnetic circuit system with the basin frame, constituted the magnetic circuit that can vibrate.
For at this, the design of quality sheet, the eigentone that can be used for regulating magnetic circuit system can change the natural frequency of system according to the different requirements of product like this by the quality of quality of regulation sheet.
The moving-iron type low-frequency audible signal device that the present invention obtains, the constant magnetic circuit system that the application support can vibrate is supported on the fixing voice coil loudspeaker voice coil, produce electromagnetic induction power by the stationary magnetic field in alternating magnetic field in the coil and the constant magnetic circuit system, promote the vibration of vibration magnetic circuit system, vibrate thereby drive the sound film that links to each other with the vibration magnetic circuit system, send sound wave.
Moving-iron type low-frequency audible signal device provided by the invention, volume is small and exquisite, mainly can be applicable to some and need send the lower sound of frequency ratio, and don't allow in the bigger volume product, such as portable tire sound audiphone.And moving-iron type low-frequency audible signal device provided by the invention, it has adopted voice coil loudspeaker voice coil to fix and the pattern of magnetic circuit vibration, and it is very low that its system's eigentone can be done, and therefore can significantly reduce the volume of product, below 30mm.The present invention can be applicable in the portable tire sound audiphone, and the tire sound that audiphone is detected plays back.
Description of drawings
Fig. 1 is an embodiment of the invention sectional structure schematic diagram.
Wherein: basin frame 1, a sheet 2, pad 3, quality sheet 4, magnetic cup 5, sound film 6, protecgulum 7, magnet steel 8, clamping plate 9, printed board 10, voice coil loudspeaker voice coil 11, bonnet 12.
Embodiment
The invention will be further described in conjunction with the accompanying drawings below by embodiment.
Embodiment 1
As shown in Figure 1, the described moving-iron type low-frequency audible signal device of present embodiment, it comprises basin frame 1, a sheet 2, pad 3, quality sheet 4, magnetic cup 5, sound film 6, protecgulum 7, magnet steel 8, clamping plate 9, printed board 10, voice coil loudspeaker voice coil 11 and bonnet 12, magnetic cup 5, magnet steel 8 and clamping plate 9 constitute constant magnetic circuit, a constant magnetic circuit and a sheet 2 constitute the vibration magnetic circuit system, and present embodiment is bonded together magnetic cup 5, magnet steel 8 and clamping plate 9 and constitutes constant magnetic circuit system; Prop up sheet 2 and adopt insert structure form and the 1 integrated through injection molding moulding of basin frame, described sheet 2 is that elasticity is propped up sheet, and pad 3 is located between a quality sheet 4 and the sheet 2, a quality sheet 4 and a sheet 2 are separated, the edge of sound film 6 is fixed on the basin frame 1, and its center links to each other with the vibration magnetic circuit system, and acoustic irradiation is come out.Protecgulum 7 is located at outside the sound film 6, and the effect of protection is provided for the sound film.The material of the adoptable neodymium iron boron of magnet steel of present embodiment is for constant magnetic circuit provides magnetic energy.Magnetic cup 5 and clamping plate 9 provide magnetism guiding access for magnet steel 8, and form magnetic gap together, and printed board 10 is fixed on the basin frame 1, are electrically connected for voice coil loudspeaker voice coil and external circuit provide.Voice coil loudspeaker voice coil 11 1 ends are fixed on the bonnet 12, and the other end is inserted in the magnetic gap of constant magnetic circuit.When having electric current to pass through in the voice coil loudspeaker voice coil, the vibration magnetic circuit system vibrates thereby produce by electromagnetic induction.Bonnet 12 both provided protection for the vibration magnetic circuit system, was used for fixing voice coil loudspeaker voice coil 11 again.20 millimeters of the basin frame diameters of present embodiment design are high 6 millimeters.
Present embodiment is with magnetic cup 5, and pad 3 and quality sheet 4 usefulness adhesives stick together; With magnet steel 8, clamping plate 9 bond together with adhesive and magnetic cup 5 under the location of magnetic rule; Printed board 10 and bonnet 12 are bonded together; Voice coil loudspeaker voice coil 11 is bonded on the bonnet 12; Bonnet 12 and basin frame 1 are bonded together; Sound film 6 edges and basin frame 1 are bonded together, and the centre of sound film 6 and magnetic cup 5 bond together; Protecgulum 7 and basin frame 1 is bonding; The voice coil line of voice coil loudspeaker voice coil 11 is welded in the printed board 10.
Claims (3)
1. moving-iron type low-frequency audible signal device, it comprises basin frame (1), prop up sheet (2), pad (3), quality sheet (4), magnetic cup (5), sound film (6), protecgulum (7), magnet steel (8), clamping plate (9), printed board (10), voice coil loudspeaker voice coil (11) and bonnet (12), its feature magnetic cup (5), magnet steel (8) and clamping plate (9) constitute constant magnetic circuit system, a constant magnetic circuit system and a sheet (2) constitute the vibration magnetic circuit system, prop up sheet (2) and adopt insert structure form and basin frame (1) integrated through injection molding moulding, described sheet (2) is that elasticity is propped up sheet, pad (3) is located between a quality sheet (4) and the sheet (2), the edge of sound film (6) is fixed on the basin frame (1), its center links to each other with the vibration magnetic circuit system, protecgulum (7) is located at outside the sound film (6), magnetic cup (5) and clamping plate (9) provide magnetism guiding access for magnet steel (8), and form magnetic gap together, printed board (10) is fixed on the basin frame (1), voice coil loudspeaker voice coil (11) one ends are fixed on the bonnet (12), and the other end is inserted in the magnetic gap of constant magnetic circuit system.
2. moving-iron type low-frequency audible signal device according to claim 1 is characterized in that the material of the neodymium iron boron that described magnet steel (8) adopts.
3. moving-iron type low-frequency audible signal device according to claim 1 and 2 is characterized in that 20 millimeters of its diameters of described basin frame (1), and is high 6 millimeters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105609624A CN102026072A (en) | 2010-11-26 | 2010-11-26 | Moving iron type low frequency acoustic generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105609624A CN102026072A (en) | 2010-11-26 | 2010-11-26 | Moving iron type low frequency acoustic generator |
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| Publication Number | Publication Date |
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| CN102026072A true CN102026072A (en) | 2011-04-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105609624A Pending CN102026072A (en) | 2010-11-26 | 2010-11-26 | Moving iron type low frequency acoustic generator |
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| CN (1) | CN102026072A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103024647A (en) * | 2011-09-23 | 2013-04-03 | 苏州恒听电子有限公司 | Moving iron type microphone unit for bone-conduction hearing aid and loudspeaker |
| WO2013044549A1 (en) * | 2011-09-30 | 2013-04-04 | 苏州恒听电子有限公司 | Sound transmitting tube device for micro speaker device |
| CN103067834A (en) * | 2012-12-14 | 2013-04-24 | 歌尔声学股份有限公司 | Vibration loudspeaker |
| CN103079132A (en) * | 2012-12-25 | 2013-05-01 | 苏州恒听电子有限公司 | Telephone receiver used for low-frequency compensation |
| WO2016004580A1 (en) * | 2014-07-08 | 2016-01-14 | 声电电子科技(惠州)有限公司 | Low frequency vibrator |
| CN103024647B (en) * | 2011-09-23 | 2016-12-14 | 苏州恒听电子有限公司 | Moving-iron microphone unit for bone conduction type sonifer and loudspeaker arrangement |
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| US4675907A (en) * | 1984-07-10 | 1987-06-23 | Pioneer Electronic Corporation | Electro-vibration transducer |
| JP2004159181A (en) * | 2002-11-07 | 2004-06-03 | Seiko Instruments Inc | Mobile electronic apparatus equipped with diaphragm type speaker |
| CN201118972Y (en) * | 2007-10-23 | 2008-09-17 | 李秋林 | A speaker with vibration function |
| JP2009124348A (en) * | 2007-11-13 | 2009-06-04 | Kenwood Corp | Magnet movable type speaker and seat for vehicle |
| CN101765045A (en) * | 2009-12-19 | 2010-06-30 | 李隆 | Moving iron type musical object inductance transducer |
| JP4580025B1 (en) * | 2009-05-21 | 2010-11-10 | 株式会社アイビット | Bone conduction transducer |
| CN201878324U (en) * | 2010-11-26 | 2011-06-22 | 宁波凯普电子有限公司 | Moving-iron type low frequency acoustical generator |
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2010
- 2010-11-26 CN CN2010105609624A patent/CN102026072A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US4675907A (en) * | 1984-07-10 | 1987-06-23 | Pioneer Electronic Corporation | Electro-vibration transducer |
| JP2004159181A (en) * | 2002-11-07 | 2004-06-03 | Seiko Instruments Inc | Mobile electronic apparatus equipped with diaphragm type speaker |
| CN201118972Y (en) * | 2007-10-23 | 2008-09-17 | 李秋林 | A speaker with vibration function |
| JP2009124348A (en) * | 2007-11-13 | 2009-06-04 | Kenwood Corp | Magnet movable type speaker and seat for vehicle |
| JP4580025B1 (en) * | 2009-05-21 | 2010-11-10 | 株式会社アイビット | Bone conduction transducer |
| CN101765045A (en) * | 2009-12-19 | 2010-06-30 | 李隆 | Moving iron type musical object inductance transducer |
| CN201878324U (en) * | 2010-11-26 | 2011-06-22 | 宁波凯普电子有限公司 | Moving-iron type low frequency acoustical generator |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103024647A (en) * | 2011-09-23 | 2013-04-03 | 苏州恒听电子有限公司 | Moving iron type microphone unit for bone-conduction hearing aid and loudspeaker |
| CN103024647B (en) * | 2011-09-23 | 2016-12-14 | 苏州恒听电子有限公司 | Moving-iron microphone unit for bone conduction type sonifer and loudspeaker arrangement |
| WO2013044549A1 (en) * | 2011-09-30 | 2013-04-04 | 苏州恒听电子有限公司 | Sound transmitting tube device for micro speaker device |
| CN103067834A (en) * | 2012-12-14 | 2013-04-24 | 歌尔声学股份有限公司 | Vibration loudspeaker |
| CN103067834B (en) * | 2012-12-14 | 2015-05-20 | 歌尔声学股份有限公司 | Vibration loudspeaker |
| CN103079132A (en) * | 2012-12-25 | 2013-05-01 | 苏州恒听电子有限公司 | Telephone receiver used for low-frequency compensation |
| CN103079132B (en) * | 2012-12-25 | 2015-09-02 | 苏州恒听电子有限公司 | A kind of receiver for low-frequency compensation |
| WO2016004580A1 (en) * | 2014-07-08 | 2016-01-14 | 声电电子科技(惠州)有限公司 | Low frequency vibrator |
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Application publication date: 20110420 |