CN202310089U - Loudspeaker based on double giant magnetostrictive laminated pieces - Google Patents
Loudspeaker based on double giant magnetostrictive laminated pieces Download PDFInfo
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- CN202310089U CN202310089U CN2011204135298U CN201120413529U CN202310089U CN 202310089 U CN202310089 U CN 202310089U CN 2011204135298 U CN2011204135298 U CN 2011204135298U CN 201120413529 U CN201120413529 U CN 201120413529U CN 202310089 U CN202310089 U CN 202310089U
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- ultra
- magnetic telescopic
- giant magnetostrictive
- cantilever beam
- loud speaker
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Abstract
The utility model relates to a loudspeaker based on double giant magnetostrictive laminated pieces. The loudspeaker comprises a cone frame and a sound film arranged on the cone frame, wherein more than one drive unit is arranged in the cone frame; one end of each drive unit is fixed with the cone frame, and the other end of each drive unit is in rigid connection with the sound film; each drive unit comprises two giant magnetostrictive units which are mutually laminated and reversely connected; and each giant magnetostrictive unit comprises a cantilever beam made of giant magnetostrictive materials or giant magnetostrictive composite materials, and a coil wound on the cantilever beam. The coil on the cantilever beam can be used as a field coil and a direct-current magnetic biasing coil simultaneously. According to the loudspeaker disclosed by the utility model, a traditional loudspeaker moving coil type magnetic circuit is abandoned; the problem of over-small amplitude of a piezoelectric ceramic vibrator is solved; the defect of lower sensitivity of a piezoelectric membrane oscillator is overcome; a mature technology of the double giant magnetostrictive laminated pieces is conveniently introduced; and the structure modularization as well as ultrathin width and length and miniaturization of the loudspeaker are facilitated.
Description
Technical field
The utility model relates to loud speaker, especially based on the New-type loudspeaker of ultra-magnetic telescopic bipack-film principle, is used for the narrow long super-thin speaker in TV, laptop computer and the mobile phone more.
Background technology
At present; Known narrow long super-thin speaker can be divided into two types: the ultrathin power type loud speaker of the narrow length that the first is traditional; Its sounding principle be when tone currents when hanging on the voice coil loudspeaker voice coil in the fixed magnetic field, voice coil loudspeaker voice coil receives Lorentz force and moves, thereby swashs the tibial membrane vibration sounding.This loud speaker must have a magnetic circuit that the power source is provided, and just the size of this magnetic circuit and weight limits further ultra-thinization of this type of loud speaker, narrow lengthization and miniaturization.It two is loud speakers of piezo-electric type, comprises piezoelectric ceramics loud speaker and piezoelectric membrane loud speaker, its sounding principle be when tone currents through piezoelectric vibrator, piezoelectric vibrator vibrates owing to inverse piezoelectric effect and then sharp tibial membrane vibration sounding.Though piezoelectric loudspeaker has the unexistent many advantages of conventional loudspeakers; But also have certain shortcoming: the piezoelectric ceramic vibrator amplitude is too small, and the sensitivity of piezoelectric membrane oscillator is on the low side, or the like.
Summary of the invention
The utility model technical problem to be solved provides a kind of based on ultra-magnetic telescopic bipack-film loud speaker, abandoning tradition loud speaker moving-coil type magnetic circuit; It is too small to solve the piezoelectric ceramic vibrator amplitude, and piezoelectric membrane oscillator sensitivity problem of lower is quoted mature ultra-magnetic telescopic bipack-film technology easily, is suitable for structural module and is suitable for loud speaker ultra-thinization of narrow length and microminiaturization.
For solving the problems of the technologies described above; The technical scheme of the utility model is: a kind of based on ultra-magnetic telescopic bipack-film loud speaker; Comprise the basin frame and be installed in the sound film on the basin frame; Be provided with more than one driver element in the said basin frame, said driver element one end and said basin frame are fixed, and the other end is connected with said sound membrane rigidity; Said driver element comprises two ultra-magnetic telescopic unit that stack each other and oppositely connect, and said ultra-magnetic telescopic unit comprises the cantilever beam processed by giant magnetostrictive material or ultra-magnetic telescopic composite material, is wrapped in the coil on the said cantilever beam.Wherein the coil on the cantilever beam is not only as the magnetizing coil while but also as the D.C. magnetic biasing coil.During work,, be that coil produces not varying magnetic field and cantilever beam is magnetized under effect of DC as the effect of D.C. magnetic biasing coil to coil simultaneously input dc power and alternating current; As the effect of magnetizing coil is under the alternating current effect, change magnetic field and acting on the cantilever beam of coil, makes cantilever beam produce strain.Because two ultra-magnetic telescopic unit are reverse the connection; So another ultra-magnetic telescopic unit must shrink when one of them ultra-magnetic telescopic unit extended; Again because two ultra-magnetic telescopic unit are bonded in together; So they can do as a whole deflection, and then as driver element generation up-down vibration driving sound film vibration pronunciation.
As improvement, said cantilever beam is processed by a monoblock giant magnetostrictive material.
As improvement, said cantilever beam comprises substrate, and said upper surface of base plate and/or lower surface are provided with some caulking grooves, is provided with the giant magnetostrictive material piece in the said caulking groove.With the giant magnetostrictive material sectionalization, it is chipping that cantilever beam is not easy when polarization.
As improvement, said driver element is connected with said sound membrane rigidity through coupler.Driver element drives the sound film through coupler and vibrates together and then sounding.
As improvement, two coils in the said ultra-magnetic telescopic unit are that two ultra-magnetic telescopic unit of the reverse formation of winding oppositely connect.
As improvement, two coils in the said ultra-magnetic telescopic unit are that two ultra-magnetic telescopic unit of the reverse formation of direct current oppositely connect.
As improvement, said driver element one end is fixedly connected with said basin frame through screw.
As improvement, be provided with two driver elements that are symmetrically set in the said basin frame, two driver elements act on the sound film simultaneously, and the suffered vibration force of sound film is also just big more, guarantees that it has enough driving powers.
The beneficial effect that the utility model is compared with prior art brought is:
Because the magnetostriction coefficient of giant magnetostrictive material is higher than three to five times of piezoelectrics; So be expected to obtain the bigger low frequency amplitude of piezoelectric speaker based on the loud speaker of ultra-magnetic telescopic bipack-film principle, thereby obtain better acoustic characteristic and then satisfy the actual needs of existing market than the excitation of piezoelectricity bipack-film.
Description of drawings
Fig. 1 is embodiment 1 a loud speaker front view.
Fig. 2 is embodiment 1 a loud speaker upward view.
Fig. 3 is embodiment 1 a loud speaker cutaway view.
Fig. 4 is embodiment 1 a cantilever beam structure sketch map.
Fig. 5 is embodiment 2 loud speaker front views.
Fig. 6 is embodiment 2 loud speaker cutaway views.
Fig. 7 is embodiment 3 loud speaker cutaway views.
Fig. 8 is embodiment 4 loud speaker cutaway views.
Fig. 9 is embodiment 5 loud speaker cutaway views.
Figure 10 is embodiment 6 loud speaker cutaway views.
Embodiment
Below in conjunction with Figure of description the utility model is described further.
Embodiment 1
Shown in Fig. 1 to 4; A kind of based on ultra-magnetic telescopic bipack-film loud speaker; Comprise basin frame 1 that narrow length is ultra-thin and with the sound film 5 of the track shape of basin frame 1 form fit, said basin frame 1 two ends are provided with installation position 9, said sound film 5 is fixed on the said basin frame 1 center of top position through ring.Be provided with a driver element 2 in the said basin frame 1, said driver element 2 one ends extend to 9 places, installation position of basin frame 1, and fix through screw 3 and said basin frame 1; Driver element 2 other ends are rigidly connected through coupler 6 and said sound film 5 centers.Said driver element 2 comprises two ultra-magnetic telescopic unit that stack each other, bond, and said ultra-magnetic telescopic unit comprises the cantilever beam 7 processed by a monoblock giant magnetostrictive material, is wrapped in the coil 4 on the said cantilever beam 7.Two coils 4 in the said ultra-magnetic telescopic unit form two ultra-magnetic telescopic unit for winding is reverse and oppositely connect.
Wherein the coil on the cantilever beam 74 is not only as the magnetizing coil while but also as the D.C. magnetic biasing coil.During work,, be that coil produces not varying magnetic field and with cantilever beam 7 magnetization under effect of DC as the effect of D.C. magnetic biasing coil to coil 4 input dc power and alternating current simultaneously; As the effect of magnetizing coil is coil changing magnetic field and acting on the cantilever beam 7 under the alternating current effect, makes cantilever beam 7 produce strains.Because two ultra-magnetic telescopic unit are reverse the connection; Promptly lay respectively at the strain opposite in sign of the cantilever beam 7 in the two ultra-magnetic telescopic unit; So another ultra-magnetic telescopic unit must shrink when one of them ultra-magnetic telescopic unit extended; Be bonded in together because of two ultra-magnetic telescopic unit again, so they can do as a whole deflection, and then as the 5 vibration pronunciations of driver element 2 generation up-down vibration driving sound films.Because the magnetostriction coefficient of giant magnetostrictive material is higher than three to five times of piezoelectrics, so be expected to obtain the bigger low frequency amplitude of piezoelectric speaker than the excitation of piezoelectricity bipack-film based on the loud speaker of ultra-magnetic telescopic bipack-film principle.
Not it should be noted that if magnetizing coil just must not have as the D.C. magnetic biasing coil simultaneously to add a coil in addition, perhaps adopt permanent magnetism as the D.C. magnetic biasing coil as the D.C. magnetic biasing coil.
The utility model abandoning tradition loud speaker moving-coil type magnetic circuit; It is too small to solve piezoelectric ceramic bipack-film amplitude, and it is on the low side to overcome piezoelectric membrane sensitivity, quotes mature ultra-magnetic telescopic bipack-film technology easily, is suitable for structural module and is suitable for loud speaker ultra-thinization of narrow length and microminiaturization.
Embodiment 2
Like Fig. 5, shown in 6; A kind of based on ultra-magnetic telescopic bipack-film loud speaker; Comprise basin frame 1 that narrow length is ultra-thin and with the sound film 5 of the track shape of basin frame 1 form fit, said basin frame 1 two ends are provided with the installation position, said sound film 5 is fixed on the said basin frame 1 center of top position through ring.Be provided with two symmetrically arranged driver elements 2 in the said basin frame 1, first driver element 2 one ends extend to the place, installation position of a wherein end of basin frame 1, and fix through screw 3 and said basin frame 1; Second driver element 2 one end extends to the place, installation position of the other end of basin frame 1, and fixes through screw 3 and said basin frame 1; Two said driver element 2 other ends all are rigidly connected through coupler 6 and said sound film 5 centers.Said driver element 2 comprises two ultra-magnetic telescopic unit that stack each other, bond, and said ultra-magnetic telescopic unit comprises the cantilever beam 7 processed by a monoblock giant magnetostrictive material, is wrapped in the coil 4 on the said cantilever beam 7.Two coils 4 in the said ultra-magnetic telescopic unit form two ultra-magnetic telescopic unit for direct current is reverse and oppositely connect.
Wherein the coil on the cantilever beam 74 is not only as the magnetizing coil while but also as the D.C. magnetic biasing coil.During work,, be that coil produces not varying magnetic field and with cantilever beam 7 magnetization under effect of DC as the effect of D.C. magnetic biasing coil to coil 4 input dc power and alternating current simultaneously; As the effect of magnetizing coil is coil changing magnetic field and acting on the cantilever beam 7 under the alternating current effect, makes cantilever beam 7 produce strains.Because two ultra-magnetic telescopic unit are reverse the connection; Promptly lay respectively at the strain opposite in sign of the cantilever beam 7 in the two ultra-magnetic telescopic unit; So another ultra-magnetic telescopic unit must shrink when one of them ultra-magnetic telescopic unit extended; Be bonded in together because of two ultra-magnetic telescopic unit again, so they can do as a whole deflection, and then as the 5 vibration pronunciations of driver element 2 generation up-down vibration driving sound films.Because the magnetostriction coefficient of giant magnetostrictive material is higher than three to five times of piezoelectrics, so be expected to obtain the bigger low frequency amplitude of piezoelectric speaker than the excitation of piezoelectricity bipack-film based on the loud speaker of ultra-magnetic telescopic bipack-film principle.
Not it should be noted that if magnetizing coil just must not have as the D.C. magnetic biasing coil simultaneously to add a coil in addition, perhaps adopt permanent magnetism as the D.C. magnetic biasing coil as the D.C. magnetic biasing coil.
The utility model abandoning tradition loud speaker moving-coil type magnetic circuit; It is too small to solve piezoelectric ceramic bipack-film amplitude, and it is on the low side to overcome piezoelectric membrane sensitivity, quotes mature ultra-magnetic telescopic bipack-film technology easily, is suitable for structural module and is suitable for loud speaker ultra-thinization of narrow length and microminiaturization.
Embodiment 3
As shown in Figure 7, a kind of based on ultra-magnetic telescopic bipack-film loud speaker, different is with embodiment 1; Said cantilever beam is processed by the ultra-magnetic telescopic composite material, and said cantilever beam comprises elastic base plate 10, and said substrate 10 lower surfaces are provided with some caulking grooves; Said caulking groove internal fixation is provided with giant magnetostrictive material piece 8; In general caulking groove is many more, 8 sectionalizations more of giant magnetostrictive material piece, and cantilever beam is not easy chipping phenomenon more when vibration.The present embodiment loadspeaker structure is the same with embodiment 1 loud speaker under the situation that does not have explanation with the sounding principle, no longer is described in detail.
Embodiment 4
As shown in Figure 8, a kind of based on ultra-magnetic telescopic bipack-film loud speaker, different is with embodiment 2; Said cantilever beam is processed by the ultra-magnetic telescopic composite material, and said cantilever beam comprises elastic base plate 10, and said substrate 10 lower surfaces are provided with some caulking grooves; Said caulking groove internal fixation is provided with giant magnetostrictive material piece 8; In general caulking groove is many more, 8 sectionalizations more of giant magnetostrictive material piece, and cantilever beam is not easy chipping phenomenon more when vibration.The present embodiment loadspeaker structure is the same with embodiment 2 loud speakers under the situation that does not have explanation with the sounding principle, no longer is described in detail.
Embodiment 5
As shown in Figure 9, a kind of based on ultra-magnetic telescopic bipack-film loud speaker, different is with embodiment 1; Said cantilever beam is processed by the ultra-magnetic telescopic composite material, and said cantilever beam comprises elastic base plate 10, and said substrate 10 upper surfaces and lower surface are equipped with some caulking grooves; Said caulking groove internal fixation is provided with giant magnetostrictive material piece 8; In general caulking groove is many more, 8 sectionalizations more of giant magnetostrictive material piece, and cantilever beam is not easy chipping phenomenon more when vibration.The present embodiment loadspeaker structure is the same with embodiment 1 loud speaker under the situation that does not have explanation with the sounding principle, no longer is described in detail.
Embodiment 6
Shown in figure 10, a kind of based on ultra-magnetic telescopic bipack-film loud speaker, different is with embodiment 2; Said cantilever beam is processed by the ultra-magnetic telescopic composite material, and said cantilever beam comprises elastic base plate 10, and said substrate 10 upper surfaces and lower surface are equipped with some caulking grooves; Said caulking groove internal fixation is provided with giant magnetostrictive material piece 8; In general caulking groove is many more, 8 sectionalizations more of giant magnetostrictive material piece, and cantilever beam is not easy chipping phenomenon more when vibration.The present embodiment loadspeaker structure is the same with embodiment 2 loud speakers under the situation that does not have explanation with the sounding principle, no longer is described in detail.
Claims (8)
1. one kind based on ultra-magnetic telescopic bipack-film loud speaker; Comprise the basin frame and be installed in the sound film on the basin frame; It is characterized in that: be provided with more than one driver element in the said basin frame, said driver element one end and said basin frame are fixed, and the other end is connected with said sound membrane rigidity; Said driver element comprises two ultra-magnetic telescopic unit that stack each other and oppositely connect, and said ultra-magnetic telescopic unit comprises the cantilever beam processed by giant magnetostrictive material or ultra-magnetic telescopic composite material, is wrapped in the coil on the said cantilever beam.
2. according to claim 1 a kind of based on ultra-magnetic telescopic bipack-film loud speaker, it is characterized in that: said cantilever beam is processed by a monoblock giant magnetostrictive material.
3. according to claim 1 a kind of based on ultra-magnetic telescopic bipack-film loud speaker, it is characterized in that: said cantilever beam comprises substrate, and said upper surface of base plate and/or lower surface are provided with some caulking grooves, are provided with the giant magnetostrictive material piece in the said caulking groove.
4. according to claim 1 a kind of based on ultra-magnetic telescopic bipack-film loud speaker, it is characterized in that: said driver element is connected with said sound membrane rigidity through coupler.
5. according to claim 1 a kind of based on ultra-magnetic telescopic bipack-film loud speaker, it is characterized in that: two coils in the said ultra-magnetic telescopic unit are that two ultra-magnetic telescopic unit of the reverse formation of winding oppositely connect.
6. according to claim 1 a kind of based on ultra-magnetic telescopic bipack-film loud speaker, it is characterized in that: two coils in the said ultra-magnetic telescopic unit are that two ultra-magnetic telescopic unit of the reverse formation of direct current oppositely connect.
7. according to claim 1 a kind of based on ultra-magnetic telescopic bipack-film loud speaker, it is characterized in that: said driver element one end is fixedly connected with said basin frame through screw.
According to claim 1 to 7 any one described a kind of based on ultra-magnetic telescopic bipack-film loud speaker, it is characterized in that: be provided with two driver elements that are symmetrically set in the said basin frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204135298U CN202310089U (en) | 2011-10-26 | 2011-10-26 | Loudspeaker based on double giant magnetostrictive laminated pieces |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204135298U CN202310089U (en) | 2011-10-26 | 2011-10-26 | Loudspeaker based on double giant magnetostrictive laminated pieces |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202310089U true CN202310089U (en) | 2012-07-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204135298U Expired - Lifetime CN202310089U (en) | 2011-10-26 | 2011-10-26 | Loudspeaker based on double giant magnetostrictive laminated pieces |
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| CN (1) | CN202310089U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014180015A1 (en) * | 2013-05-08 | 2014-11-13 | 歌尔声学股份有限公司 | Flat plate type bass loudspeaker |
| CN111356065A (en) * | 2018-12-20 | 2020-06-30 | 北京小米移动软件有限公司 | Sound production module and electronic equipment |
-
2011
- 2011-10-26 CN CN2011204135298U patent/CN202310089U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014180015A1 (en) * | 2013-05-08 | 2014-11-13 | 歌尔声学股份有限公司 | Flat plate type bass loudspeaker |
| US9788121B2 (en) | 2013-05-08 | 2017-10-10 | Goertek Inc. | Flat plate-type bass loudspeaker |
| CN111356065A (en) * | 2018-12-20 | 2020-06-30 | 北京小米移动软件有限公司 | Sound production module and electronic equipment |
| CN111356065B (en) * | 2018-12-20 | 2021-12-28 | 北京小米移动软件有限公司 | Sound production module and electronic equipment |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120704 |
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| CX01 | Expiry of patent term |