CN105681987A - Moving-iron vibration device and sounding device using same - Google Patents
Moving-iron vibration device and sounding device using same Download PDFInfo
- Publication number
- CN105681987A CN105681987A CN201610237491.0A CN201610237491A CN105681987A CN 105681987 A CN105681987 A CN 105681987A CN 201610237491 A CN201610237491 A CN 201610237491A CN 105681987 A CN105681987 A CN 105681987A
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- coil
- magnet
- supporting seat
- tie mechanism
- housing
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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
- H04R11/00—Transducers of moving-armature or moving-core type
- H04R11/02—Loudspeakers
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
Abstract
The invention discloses a moving-iron vibration device and a sounding device using the same. The moving-iron vibration device comprises a housing. According to the technical points, an inductance coil and a moving-iron mechanism sleeved in the inductance coil are arranged in the housing, the moving-iron mechanism comprises a magnet, and the inductance coil is arranged in a magnetic flux loop of the magnet and enables the moving-iron mechanism to vibrate when powered on. The invention provides the moving-iron vibration device which conducts vibration of the moving-iron mechanism under the effect of a magnetic field of the inductance coil, and the moving-iron vibration device can be applied to a miniature mechanical part, bringing new experience. The invention further provides the sounding device using the moving-iron vibration device, and a good low-frequency sound effect is provided.
Description
[technical field]
The present invention relates to the sound-producing device of a kind of dynamic ferrum shaking device and application thereof.
[background technology]
The frame for movement of existing conduct vibrations device, it is mainly moving-coil mode, or coil fixes, additional U-shaped ferrum closes with coil package again, by the interaction between electric magnet and Magnet, the structure of similar electric bell drives vibrations, and relative impedances is higher, Circuit Matching is excessively complicated, and system cost is relatively too high.
Electrodynamic type woofer in the market, mainly moving-coil speaker or the moving iron loud speaker based on electric bell structure, multi-media speaker frequency response is typically in more than 40Hz by the former, the weight of earphone horn vibrating diaphragm is caused that resonant frequency is difficult to lower than 70Hz, realize desirable low-frequency effect to be really difficult to, and the moving iron loud speaker of the latter's electric bell structure, structure is complicated, and the distortion factor of sound is higher.
[summary of the invention]
It is an object of the present invention to provide a kind of dynamic ferrum shaking device, utilize the vibrations under the action of a magnetic field of inductance coil of the Dong Tie mechanism, vibrations are conducted, simple in construction, can be applicable to small-sized mechanical part, bring brand-new experience.
The present invention also provides for the sound-producing device of the dynamic ferrum shaking device of a kind of application, brings fine low frequency audio.
The present invention is achieved by the following technical solutions:
A kind of dynamic ferrum shaking device, including housing, it is characterized in that: in described housing, be provided with inductance coil and the Dong Tie mechanism being sheathed in described inductance coil, described Dong Tie mechanism includes Magnet, described inductance coil is positioned at the flux circuit of described Magnet and described Dong Tie mechanism can be made to shake when energising, speaker can be made when being used for and promoting vibrating diaphragm to move, driver can be done when being used for providing power source (containing vibrations) and use.
A kind of dynamic ferrum shaking device as above, it is characterised in that: described Dong Tie mechanism also includes axis supporting seat, and described Magnet is sheathed on described axis supporting seat, and described inductance coil includes first coil, and described first coil is positioned at the middle and upper part of described Magnet.
A kind of dynamic ferrum shaking device as above, it is characterized in that: described Dong Tie mechanism also includes being sheathed on axis supporting seat and gripping the pad of described Magnet from both sides respectively, the middle part of described first coil is relative with the pad of described Magnet side, the winding in the direction of the clock of described first coil.
A kind of dynamic ferrum shaking device as above, it is characterized in that: described inductance coil also includes being positioned at the second coil of described Magnet middle and lower part, the middle part of described second coil is relative with the pad of described Magnet opposite side, described second coil winding counterclockwise and with described first coil circuit communication.
A kind of dynamic ferrum shaking device as above, it is characterized in that: between described axis supporting seat and housing, be provided with the Flexible Connector for maintaining the motion of described dynamic ferrum mechanism piston, being provided with in the middle of described Flexible Connector for the connecting hole for described axis supporting seat traverse, the edge of described Flexible Connector and described housing offset.
Ferrum shaking device as above a kind of dynamic, it is characterised in that: described Flexible Connector is additionally provided with multiple being uniformly distributed and for the special-shaped breach of damping vibration.
A kind of dynamic ferrum shaking device as above, it is characterised in that: described Flexible Connector is made up of plastic resilient material or metallic resilient material.
A kind of dynamic ferrum shaking device as above, it is characterised in that: described axis supporting seat includes the middle jack-post for wearing described Magnet, and described axis supporting seat is provided with the lactch groove setting described Magnet and pad for card.
Apply the sound-producing device of the dynamic ferrum shaking device of as above any one, it is characterised in that: described housing is additionally provided with the vibration membrane being driven vibrations sounding by described Dong Tie mechanism.
A kind of sound-producing device as above, it is characterised in that: described vibration membrane is provided with dust cap, and described housing is provided with multiple for the opening for air circulation.
Compared with prior art, the present invention has the following advantages:
1, due to the fact that moving component is Magnet and pad, heavy moving parts is bigger, achieve resonant frequency and can easily be low to moderate 40Hz, or even lower than 20Hz, when piston movement does in Dong Tie mechanism, by this controlled vibrations conduction to other mechanical parts, highly sensitive, a kind of brand-new vibrations frame for movement is provided, controls to optimize from Design of Mechanical Structure to vibration frequency comprehensively, have broad application prospects.
2, the present invention changes the design of traditional idea, substitute moving-coil structure, and inductance coil is fixed, Magnet and pad move and reduce resonant frequency, to low frequency tonequality, making sound accomplish to become apparent from, the distortion factor is low, the acoustics making audio amplifier and earphone is more perfect, has expanded dynamic ferrum and has driven the range of application of structure.
3, the Dong Tie mechanism of the present invention can as a driver, whole Dong Tie mechanism is utilized to do driver, the mechanical vibration that armature produces are changed, piston movement Dong Tie mechanism produced, is converted into vibrations and is conducted to other mechanical organs, highly sensitive, the volume of shaking device can random transform size, can be applied in the experience of 3D multidimensional seat, it is also possible to be applied in the shaking device of mobile phone, bring more life-like experience effect to user.
[accompanying drawing explanation]
Fig. 1 is the embodiment of the present invention 1 profile;
Fig. 2 is the embodiment of the present invention 1 partial perspective view;
Fig. 3 is the embodiment of the present invention 1 decomposing schematic representation;
Fig. 4 is the embodiment of the present invention 1 axonometric chart;
Fig. 5 is the embodiment of the present invention 1 Flexible Connector axonometric chart
Fig. 6 is the embodiment of the present invention 2 inductance coil and Dong Tie mechanism profile;
Fig. 7 is the embodiment of the present invention 2 axonometric chart;
Fig. 8 is the embodiment of the present invention 2 profile;
Fig. 9 is the embodiment of the present invention 2 section three-dimensional map.
[detailed description of the invention]
Embodiment 1:
One as Figure 1-5 moves ferrum shaking device, including housing 1, inductance coil 2 and the Dong Tie mechanism 3 being sheathed in described inductance coil 2 it is provided with in described housing 1, described Dong Tie mechanism 3 includes Magnet 32, and described inductance coil 2 is positioned at the flux circuit of described Magnet 32 and described Dong Tie mechanism 3 can be made to shake when energising.The Dong Tie mechanism outer sheath of this device is provided with inductance coil, inductance coil is fixed on device case, Dong Tie mechanism is provided with Magnet, access after power supply until inductance coil, Dong Tie mechanism is promoted by Magnet, in housing, do reciprocal vibrations, mechanical shock is transmitted to miscellaneous part, produce dynamic effect.
Described Dong Tie mechanism 3 also includes axis supporting seat 31, and described Magnet 32 is sheathed on described axis supporting seat 31, and described inductance coil 2 includes first coil 21, and described first coil 21 is positioned at the middle and upper part of described Magnet 32. The magnetic field of inductance coil is overlapping with the magnetic field of the Magnet of Dong Tie mechanism, and produce the effect of mutual power, make axis supporting seat and Magnet thereon, together it is driven vibrations, its vibration frequency, by the energising FREQUENCY CONTROL of inductance coil, simultaneously because of axis supporting seat and Magnet thereon, compares existing moving-coil structure more heavy, the resonant frequency produced can reach below 20Hz, Vibration induction excellent.
Described Dong Tie mechanism 3 also includes the pad 33 being sheathed on axis supporting seat 31 and gripping described Magnet 32 from both sides respectively, and the middle part of described first coil 21 is relative with the pad 33 of described Magnet 32 side, described first coil 21 winding in the direction of the clock. Magnet adopts annular magnet to be set on axis supporting seat, Magnet both sides and pad link position are the positions that the magnetic line of force of magnetic field of magnets is the most intensive, the first coil of the inductance coil pad around Magnet top is arranged, the middle part of first coil and pad are oppositely arranged, N pole near Magnet, carrying out cutting magnetic line action in the position that Magnet N pole place magnetic flux is maximum during vibrations, now magnetic flux is most effective, and first coil is around the winding in the direction of the clock of Dong Tie mechanism.
Described inductance coil 2 also includes the second coil 22 being positioned at described Magnet middle and lower part, and the middle part of described second coil 22 is relative with the pad 33 of described Magnet 32 opposite side, described second coil 22 winding counterclockwise and with described first coil 21 circuit communication. second coil is connected by power line with first coil, it is concurrently accessed circuit, the pad of the second coil encircling Magnet middle and lower part of inductance coil is arranged, the middle part of the second coil and another pad are oppositely arranged, S pole near Magnet, cutting magnetic line action is carried out in the position that Magnet S pole place magnetic flux is maximum during vibrations, now magnetic flux is most effective, second coil is around the winding counterclockwise of Dong Tie mechanism, first coil and the contrary magnetic line of force of the equidirectional cut direction of the second coil, Dong Tie mechanism is applied the effect of power in the same direction simultaneously, Dong Tie mechanism is promoted to move back and forth, produce vibrating effect.
The Flexible Connector 34 for maintaining described Dong Tie mechanism 3 piston movement it is provided with between described axis supporting seat 31 and housing 1, being provided with in the middle of described Flexible Connector 34 for the connecting hole 35 for the traverse of described axis supporting seat 31, the edge of described Flexible Connector 34 and described housing 1 offset. inductance coil is fixed on housing, housing and Dong Tie mechanism is connected by Flexible Connector, in Dong Tie mechanism continuous vibration process, housing and inductance coil keep fixing, Dong Tie mechanism is as a driver, convert electrical energy into mechanical energy, the specially good effect of seat in 3D dynamic cinema, or the vibroseis of mobile phone, more life-like experience effect can be brought to user, and equipment design is no longer limited to the size of volume, as vibrations drive source, automobile can be applied to, the big specification application such as machining, can also apply to sound equipment, toy, the small dimension applications such as mobile phone, bring broader practice prospect, the both ends up and down of axis supporting seat are connected to the conduction connecting plate of conduction vibrations, can be used alone, also can be connected with other accessories and vibrations are conducted, card is had to set the outer steps design of conduction connecting plate between conduction connecting plate and housing, it is connected together by interior step between housing and Flexible Connector, it is easy to when assembling be located by connecting.
Described Flexible Connector 34 is additionally provided with multiple being uniformly distributed and for the special-shaped breach 36 of damping vibration.Special-shaped breach on Flexible Connector is arranged, abnormity breach includes the first arc sections near Flexible Connector edge, with the second arc sections near connector place, both connect and are uniformly distributed on Flexible Connector, make Flexible Connector in the reciprocating action process of Dong Tie mechanism, can bearing the high-frequency active force of pullling of its generation, Flexible Connector is not likely to produce Fatigue Deformation, and long time running is without influence on the vibration frequency of Dong Tie mechanism.
Described Flexible Connector 34 is made up of plastic resilient material or metallic resilient material. Flexible Connector connects other mechanical organs, carry out vibrations conduction time, adopt as: beryllium copper, stainless steel substrates elastomeric material is made.
Described axis supporting seat 31 includes the middle jack-post 311 for wearing described Magnet 32, and described axis supporting seat 31 is provided with the lactch groove 312 setting described Magnet 32 and pad 33 for card. Lactch groove on axis supporting seat, setting-up piece and Magnet is set for card, and then when making Magnet produce repulsive force with inductance coil and move, ensure that axis supporting seat, with pad and Magnet, relative displacement will not occur, ensure long-play Stability Analysis of Structures, lactch groove can be one-body molded, it is also possible to is carried out assembling molding by axis supporting seat two ends.
Embodiment 2:
The sound-producing device of the dynamic ferrum shaking device of a kind of application as Figure 6-9, including housing 1, inductance coil 2 and the Dong Tie mechanism 3 being sheathed in described inductance coil 2 it is provided with in described housing 1, described Dong Tie mechanism 3 includes Magnet 32, and described inductance coil 2 is positioned at the flux circuit of described Magnet 32 and described Dong Tie mechanism 3 can be made to shake when energising. The Dong Tie mechanism outer sheath of this device is provided with inductance coil, inductance coil is fixed on device case, Dong Tie mechanism is provided with Magnet, access after power supply until inductance coil, Dong Tie mechanism is promoted by Magnet, in housing, do reciprocal vibrations, mechanical shock is transmitted to miscellaneous part, produce dynamic effect.
Described Dong Tie mechanism 3 also includes axis supporting seat 31, and described Magnet 32 is sheathed on described axis supporting seat 31, and described inductance coil 2 includes first coil 21, and described first coil 21 is positioned at the middle and upper part of described Magnet 32. The magnetic field of inductance coil is overlapping with the magnetic field of the Magnet of Dong Tie mechanism, and produce the effect of mutual power, make axis supporting seat and Magnet thereon, together it is driven vibrations, its vibration frequency, by the energising FREQUENCY CONTROL of inductance coil, simultaneously because of axis supporting seat and Magnet thereon, compares existing moving-coil structure more heavy, the resonant frequency produced can reach below 20Hz, Vibration induction excellent.
Described Dong Tie mechanism 3 also includes the pad 33 being sheathed on axis supporting seat 31 and gripping described Magnet 32 from both sides respectively, and the middle part of described first coil 21 is relative with the pad 33 of described Magnet 32 side, described first coil 21 winding in the direction of the clock. Magnet adopts annular magnet to be set on axis supporting seat, Magnet both sides and pad link position are the positions that the magnetic line of force of magnetic field of magnets is the most intensive, the first coil of the inductance coil pad around Magnet top is arranged, the middle part of first coil and pad are oppositely arranged, N pole near Magnet, carrying out cutting magnetic line action in the position that Magnet N pole place magnetic flux is maximum during vibrations, now magnetic flux is most effective, and first coil is around the winding in the direction of the clock of Dong Tie mechanism.
Described inductance coil 2 also includes the second coil 22 being positioned at described Magnet middle and lower part, and the middle part of described second coil 22 is relative with the pad 33 of described Magnet 32 opposite side, described second coil 22 winding counterclockwise and with described first coil 21 circuit communication.Second coil is connected by power line with first coil, it is concurrently accessed circuit, the pad of the second coil encircling Magnet middle and lower part of inductance coil is arranged, the middle part of the second coil and another pad are oppositely arranged, S pole near Magnet, cutting magnetic line action is carried out in the position that Magnet S pole place magnetic flux is maximum during vibrations, now magnetic flux is most effective, second coil is around the winding counterclockwise of Dong Tie mechanism, first coil and the contrary magnetic line of force of the equidirectional cut direction of the second coil, Dong Tie mechanism is applied the effect of power in the same direction simultaneously, Dong Tie mechanism is promoted to move back and forth, produce vibrating effect.
The Flexible Connector 34 for maintaining described Dong Tie mechanism 3 piston movement it is provided with between described axis supporting seat 31 and housing 1, being provided with in the middle of described Flexible Connector 34 for the connecting hole 35 for the traverse of described axis supporting seat 31, the edge of described Flexible Connector 34 and described housing 1 offset. Inductance coil is fixed on housing, housing and Dong Tie mechanism is connected by Flexible Connector, in Dong Tie mechanism continuous vibration process, housing and inductance coil keep fixing, and the special-shaped breach on Flexible Connector is arranged, make Flexible Connector in the reciprocating action process of Dong Tie mechanism, the high-frequency of its generation can be born and pull active force, Dong Tie mechanism is as the driving mechanism of loudspeaker, splendid low frequency audio is brought to feel, it is greatly enlarged the use scope of dynamic ferrum sound equipment, such as earphone etc., more life-like experience effect can be brought to user.
Described Flexible Connector 34 is additionally provided with multiple being uniformly distributed and for the special-shaped breach 36 of damping vibration. Special-shaped breach on Flexible Connector is arranged, make Flexible Connector in the reciprocating action process of Dong Tie mechanism, can bearing the high-frequency active force of pullling of its generation, Flexible Connector is not likely to produce Fatigue Deformation, and long time running is without influence on the vibration frequency of Dong Tie mechanism.
Described Flexible Connector 34 is made up of plastic resilient material or metallic resilient material. During the vibration membrane of connecting sound equipment, Flexible Connector adopts the such as plastic resilient materials such as nylon, rubber, synthetic plastic to make.
Described axis supporting seat 31 includes the middle jack-post 311 for wearing described Magnet 32, and described axis supporting seat 31 is provided with the lactch groove 312 setting described Magnet 32 and pad 33 for card. Lactch groove on axis supporting seat, setting-up piece and Magnet is set for card, and then when making Magnet produce repulsive force with inductance coil and move, ensure that axis supporting seat, with pad and Magnet, relative displacement will not occur, ensure long-play Stability Analysis of Structures, lactch groove can be one-body molded, it is also possible to is carried out assembling molding by axis supporting seat two ends.
Described housing 1 is additionally provided with the vibration membrane 4 being driven vibrations sounding by described Dong Tie mechanism 3. When shaking conducting system and being the sound-producing device such as loudspeaker or earphone, Dong Tie mechanism drives vibration membrane to send sound, particularly low frequency reaches below 40Hz, audio and tonequality will be greatly improved, take into account medium-high frequency simultaneously, bring sound effect especially clearly, and structural volume can be accomplished only small, also can reach the effect of combination audio such as earphone.
Described vibration membrane 4 is provided with dust cap 41, and described housing 1 is provided with multiple for the opening 12 for air circulation. Dust cap protects Dong Tie mechanism; when Dong Tie mechanism is when back and forth shaking; the air pulsation in housing can be driven; and then the vibration membrane of sound equipment can be produced resonance impact; cause quality distortion, set up multiple opening, it is possible to the resonance reducing the air in housing affects; prevent audio distortions, strengthen heat sinking function simultaneously.
Described housing 1 is provided with multiple for the opening 12 for air circulation. When Dong Tie mechanism is when back and forth shaking, the air pulsation in housing can be driven, and then the vibration membrane of sound equipment can be produced resonance impact, cause quality distortion, set up multiple opening, it is possible to the resonance reducing the air in housing affects, it is prevented that audio distortions.
Claims (10)
1. a dynamic ferrum shaking device, including housing (1), it is characterized in that: in described housing (1), be provided with inductance coil (2) and the Dong Tie mechanism (3) being sheathed in described inductance coil (2), described Dong Tie mechanism (3) includes Magnet (32), and described inductance coil (2) is positioned at the flux circuit of described Magnet (32) and described Dong Tie mechanism (3) can be made to shake when energising.
2. the dynamic ferrum shaking device of one according to claim 1, it is characterized in that: described Dong Tie mechanism (3) also includes axis supporting seat (31), described Magnet (32) is sheathed on described axis supporting seat (31), described inductance coil (2) includes first coil (21), and described first coil (21) is positioned at the middle and upper part of described Magnet (32).
3. the dynamic ferrum shaking device of one according to claim 2, it is characterized in that: described Dong Tie mechanism (3) also includes being sheathed on axis supporting seat (31) and gripping respectively from both sides the pad (33) of described Magnet (32), the middle part of described first coil (21) is relative with the pad (33) of described Magnet (32) side, described first coil (21) winding in the direction of the clock.
4. the dynamic ferrum shaking device of one according to claim 3, it is characterized in that: described inductance coil (2) also includes being positioned at second coil (22) of described Magnet middle and lower part, the middle part of described second coil (22) is relative with the pad (33) of described Magnet (32) opposite side, the winding counterclockwise of described second coil (22) and with described first coil (21) circuit communication.
5. the dynamic ferrum shaking device of one according to claim 2, it is characterized in that: between described axis supporting seat (31) and housing (1), be provided with the Flexible Connector (34) for maintaining described Dong Tie mechanism (3) piston movement, being provided with in the middle of described Flexible Connector (34) for the connecting hole (35) for the traverse of described axis supporting seat (31), the edge of described Flexible Connector (34) and described housing (1) offset.
6. the dynamic ferrum shaking device of one according to claim 5, it is characterised in that: described Flexible Connector (34) is additionally provided with multiple being uniformly distributed and for the special-shaped breach (36) of damping vibration.
7. the dynamic ferrum shaking device of one according to claim 5, it is characterised in that: described Flexible Connector (34) is made up of plastic resilient material or metallic resilient material.
8. the dynamic ferrum shaking device of one according to claim 2, it is characterized in that: described axis supporting seat (31) includes the middle jack-post (311) for wearing described Magnet (32), and described axis supporting seat (31) is provided with the lactch groove (312) setting described Magnet (32) and pad (33) for card.
9. the sound-producing device applying the dynamic ferrum shaking device of any one of claim 1-8, it is characterised in that: described housing (1) is additionally provided with the vibration membrane (4) being driven vibrations sounding by described Dong Tie mechanism (3).
10. a kind of sound-producing device according to claim 9, it is characterized in that: described vibration membrane (4) is provided with dust cap (41), described housing (1) is provided with multiple for the opening (12) for air circulation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610237491.0A CN105681987A (en) | 2016-04-15 | 2016-04-15 | Moving-iron vibration device and sounding device using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610237491.0A CN105681987A (en) | 2016-04-15 | 2016-04-15 | Moving-iron vibration device and sounding device using same |
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| Publication Number | Publication Date |
|---|---|
| CN105681987A true CN105681987A (en) | 2016-06-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610237491.0A Pending CN105681987A (en) | 2016-04-15 | 2016-04-15 | Moving-iron vibration device and sounding device using same |
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| CN (1) | CN105681987A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110896517A (en) * | 2019-10-31 | 2020-03-20 | 瑞声科技(新加坡)有限公司 | Screen sound production exciter and electronic equipment |
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| US5266921A (en) * | 1992-01-30 | 1993-11-30 | Sparton Corporation | Method and apparatus for adjusting vehicle horns |
| CN2563877Y (en) * | 2002-07-12 | 2003-07-30 | 天津市大德喷泉科技有限公司 | Moving-iron type momentum transducer |
| CN101026901A (en) * | 2006-02-20 | 2007-08-29 | 张凡 | Double-coil dual magnetic gap transducer |
| CN101765045A (en) * | 2009-12-19 | 2010-06-30 | 李隆 | Moving iron type musical object inductance transducer |
| CN202565458U (en) * | 2011-12-08 | 2012-11-28 | 吴宁 | Electroacoustic unit occupying less space |
| CN104640035A (en) * | 2013-11-07 | 2015-05-20 | 哈曼国际工业有限公司 | Dual coil moving magnet transducer |
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2016
- 2016-04-15 CN CN201610237491.0A patent/CN105681987A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5266921A (en) * | 1992-01-30 | 1993-11-30 | Sparton Corporation | Method and apparatus for adjusting vehicle horns |
| CN2563877Y (en) * | 2002-07-12 | 2003-07-30 | 天津市大德喷泉科技有限公司 | Moving-iron type momentum transducer |
| CN101026901A (en) * | 2006-02-20 | 2007-08-29 | 张凡 | Double-coil dual magnetic gap transducer |
| CN101765045A (en) * | 2009-12-19 | 2010-06-30 | 李隆 | Moving iron type musical object inductance transducer |
| CN202565458U (en) * | 2011-12-08 | 2012-11-28 | 吴宁 | Electroacoustic unit occupying less space |
| CN104640035A (en) * | 2013-11-07 | 2015-05-20 | 哈曼国际工业有限公司 | Dual coil moving magnet transducer |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110896517A (en) * | 2019-10-31 | 2020-03-20 | 瑞声科技(新加坡)有限公司 | Screen sound production exciter and electronic equipment |
| CN110896517B (en) * | 2019-10-31 | 2021-06-15 | 瑞声科技(新加坡)有限公司 | Screen sound production exciter and electronic equipment |
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Application publication date: 20160615 |