CN203181216U - Tuning fork resonant giant magnetostriction speaker - Google Patents
Tuning fork resonant giant magnetostriction speaker Download PDFInfo
- Publication number
- CN203181216U CN203181216U CN 201320173104 CN201320173104U CN203181216U CN 203181216 U CN203181216 U CN 203181216U CN 201320173104 CN201320173104 CN 201320173104 CN 201320173104 U CN201320173104 U CN 201320173104U CN 203181216 U CN203181216 U CN 203181216U
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- tuning fork
- tuning
- magnetostrictive
- giant
- speaker
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Abstract
The utility model relates to a tuning fork resonant giant magnetostriction speaker. The tuning fork resonant giant magnetostriction speaker comprises a tuning fork resonant amplification mechanism, a giant magnetostriction driver and a sound box. The giant magnetostriction driver is arranged between two arms of the tuning fork resonant amplification mechanism, the axle center of the giant magnetostriction driver is positioned near to the bottom end of the tuning fork resonant amplification mechanism, the distance between the axle center and the bottom end of the tuning fork resonant amplification mechanism is L which is 1/4 to 1/5 of the length of the arm length of the tuning fork resonant amplification mechanism, and the clamp forces provided by pads and two arms of the tuning fork resonant amplification mechanism are employed as pretightening forces required by the giant magnetostriction driver for work. According to the tuning fork resonant giant magnetostriction speaker, a tuning fork is employed as the amplification apparatus for output of the giant magnetostriction driver, direct linearity amplification of amplitude is achieved, sound intensity is enhanced, power consumption is reduced, simultaneously, unsmooth frequency response of the gant magnetostriction speaker is corrected employing the frequency response curve of tuning fork resonance, and unbalanced phenomenon of different sound parts is alleviated.
Description
Technical field
The utility model relates to a kind of New-type loudspeaker, especially a kind of resonant mode giant-magnetostrictive speaker of introducing the tuning fork element.
Background technology
Giant magnetostrictive material is a kind of magnetostrictive material of realizing electricity-magnetic-mechanical energy conversion, this material is in certain alternating magnetic field, can stretch by spontaneous generation trace, be successfully applied to aspects such as sonar system, ultrasonic transducer, actuator, vibration insulating system and large torque low speed motor at present.The conventional loudspeakers that giant-magnetostrictive speaker broken through in design adopts voice coil loudspeaker voice coil to drive and the mode of vibrating diaphragm sounding, thereby the arrangement that utilizes giant magnetostrictive material externally can change the material internal magnetic domain under the effect of excitation field makes the characteristic of length of material or stereomutation directly to drive the soundboard sounding.
The pronunciation principle that present giant-magnetostrictive speaker generally adopts is: sound source signal is converted into alternating magnetic field by electromagnetic induction with AC signal after power amplification, be converted into mechanical oscillation signal by giant magnetostrictive material again, mechanical oscillation signal directly is carried in and makes its vibration sounding on the hard material.Development to this giant magnetostrictive material loud speaker both at home and abroad all rests on the mode that single-point drives or adopts giant-magnetostrictive speaker and conventional loudspeakers to combine.Because super-magnetostrictive drive output amplitude (displacement) is limited, so comparing with conventional loudspeakers, giant-magnetostrictive speaker all has a certain distance on tonequality and loudness.The normal method of using is single increasing power amplifier multiple at present, but this can not improve tonequality and the increase driver output displacement of giant-magnetostrictive speaker, and exists power consumption big, and the cost height easily produces problems such as distortion.
Summary of the invention
The purpose of this utility model is to provide a kind of resonant mode giant-magnetostrictive speaker of introducing the tuning fork element.Utilize the tuning resonance performance driving rigid planar vibration pronunciation of tuning fork, to improve tonequality.Utilize tuning fork to remove to revise the current magnetic telescopic driver frequency response curve that still has more defective for frequency response curve splendid in certain scope, adopt Multipoint Drive, make final frequency response curve more smooth the frequency response curve of tuning fork and the curve stack of former magnetic telescopic driver.
The technical scheme that the utility model technical solution problem is taked is as follows:
The utility model comprises tuning-fork type resonance enlarger, super-magnetostrictive drive, sounding audio amplifier.Super-magnetostrictive drive contracts by the pad precompressed and places between the tuning-fork type resonance enlarger both arms, the shaft core position of super-magnetostrictive drive is near tuning-fork type resonance enlarger bottom part, with the distance of tuning-fork type resonance enlarger bottom be L, L accounts for 1/4 to 1/5 of tuning-fork type resonance enlarger brachium, and tuning-fork type resonance enlarger exists as the media between super-magnetostrictive drive and the sounding audio amplifier.
Described super-magnetostrictive drive is made up of giant magnetostrictive rod, permanent magnet, coil rack, solenoid, the giant magnetostrictive rod that permanent magnet is housed in the coil rack and is clipped by two blocks of permanent magnets, coil rack is around with solenoid, and coil rack is contained in the sleeve.
The combined vibrator of described super-magnetostrictive drive and tuning-fork type resonance enlarger has a plurality of.
Compared with prior art, the beneficial effects of the utility model:
The utility model adopts tuning fork as the amplifying device of super-magnetostrictive drive output, directly linearity has been amplified amplitude, promoted volume, reduced power consumption, utilize simultaneously tuning fork resonance the frequency response curve correction the uneven situation of giant-magnetostrictive speaker frequency response, alleviated the unbalanced phenomenon of each part.
The tuning-fork type resonance mechanism that the utility model adopts can design its magnification ratio and frequency response curve within the specific limits arbitrarily.
The utility model is simple in structure, and its sounding body can be hard materials such as sound plate or sound equipment, and its shape and thickness are unrestricted within the specific limits.
The utility model can adapt to soundboard and the audio amplifier of unlike material and size, as long as change the size of tuning fork and the quantity of design and change tuning fork drive unit according to the deficiency of selected materials frequency response curve.
The utility model can reach the optimal effectiveness of tuning fork correction as long as the structure of system is carried out allocation optimum, comprises the allocation optimum of multiple spot tuning fork orientation, angle etc.
The utility model utilizes the pronunciation of multiple spot tuning fork resonance excitation hard plate material, dull and stereotyped amplitude strengthens, volume strengthens, the tonequality of multiple spot correction loud speaker is better than the single-point type giant-magnetostrictive speaker, and the enhancing of power amplifier utilance has guaranteed the raising of volume especially, the performance of high tone quality.
The utility model manufacture craft is easy.
Description of drawings
Fig. 1 is tuning-fork type resonance giant-magnetostrictive speaker schematic diagram;
Fig. 2 is the super-magnetostrictive drive cutaway view;
Fig. 3 is the desirable frequency response curve schematic diagrames of 7 distributed mode resonance loud speakers;
Fig. 4 is several simpler array modes;
Among the figure, 1. tuning-fork type resonance enlarger, 2. super-magnetostrictive drive, 3. pad, 4. sounding audio amplifier, 5. permanent magnet, 6. giant magnetostrictive rod, 7. coil rack, 8. solenoid, 9. sleeve.
Embodiment
Further specify the utility model below in conjunction with accompanying drawing.
With reference to shown in Figure 1, resonant mode giant-magnetostrictive speaker of the present utility model is by tuning-fork type resonance enlarger 1, super-magnetostrictive drive 2, and pad 3, sounding audio amplifier 4 is formed.Ultra-magnetic telescopic device 2 places between tuning-fork type resonance enlarger 1 both arms, its shaft core position is positioned at 1/4 to 1/5 place that accounts for tuning-fork type resonance enlarger 1 brachium near tuning-fork type resonance enlarger 1 bottom part, required axial pre tightening force when the clamping force by pad 3 and tuning-fork type resonance enlarger 1 both arms provides giant magnetostrictive rod 6 work, or apply other position that precompression is fixed in tuning-fork type resonance enlarger 1.Because of the physics lever characteristic of tuning-fork type resonance enlarger 1 its vibration is amplified behind the magnetic telescopic driver 2 generation audio frequency vibrations, simultaneously, the frequency response curve correction of tuning-fork type resonance enlarger 1 part that caves in the frequency response curve of loud speaker, utilize the mode of multiple spot complementation also to make the whole frequency response curve of whole loud speaker more smooth.Vibration after will amplifying at last is passed to sounding audio amplifier 4, causes sounding audio amplifier 4 sympathetic response sounding.
Described tuning-fork type resonance mechanism exists as the media between super-magnetostrictive drive and the sounding audio amplifier, and with traditional tuning fork structure basically identical, its resonance frequency obtains according to survey driver frequency response curve.
With reference to shown in Figure 2, super-magnetostrictive drive 2 is made up of permanent magnet 5, giant magnetostrictive rod 6, coil rack 7, solenoid 8.The giant magnetostrictive rod 6 that permanent magnet 5 is housed in the coil rack 7 and is clipped by two blocks of permanent magnets 5,5 pairs of giant magnetostrictive rods 6 of permanent magnet have applied bias magnetic field and have avoided giant magnetostrictive rod 6 to produce the frequency multiplication phenomenon under field drives, coil rack 7 is around with solenoid 8, coil rack 7 is contained in the sleeve 9, and the constant bias magnetic field superposition that the alternating magnetic field that solenoid 8 produces and permanent magnet 5 produce forms driving magnetic field.
With reference to shown in Figure 3, can select 5 to 7 resonance enlargers that the full frequency band signal frequency split is amplified, need special-purpose frequency divider that each signal is independently supplied with the resonant mode enlarger.At last by realizing harmonious sounding after the reasonable disposition of each resonance enlarger position.
With reference to shown in Figure 4, several tuning-fork type resonance enlargers are structured the formation on the soundboard of distributed mode loudspeaker according to certain array approach, can make the vibration of each driver take place to superpose and resonate at soundboard, and the delay time of the input signal of each unit in the control array, can make sound wave can take place to superpose and do not interfere with each other in place or the direction of appointment, it is stereo that loud speaker is produced on a large scale, reaches expection space reverberation effect.
Claims (3)
1. tuning fork resonant mode giant-magnetostrictive speaker, comprise tuning-fork type resonance enlarger (1), super-magnetostrictive drive (2), sounding audio amplifier (4), it is characterized in that: super-magnetostrictive drive (2) contracts by pad (3) precompressed and places between tuning-fork type resonance enlarger (1) both arms, the shaft core position of super-magnetostrictive drive (2) is near tuning-fork type resonance enlarger (1) bottom part, with the distance of tuning-fork type resonance enlarger (1) bottom be L, L accounts for 1/4 to 1/5 of tuning-fork type resonance enlarger (1) brachium, and tuning-fork type resonance enlarger (1) exists as the media between super-magnetostrictive drive (2) and the sounding audio amplifier (4).
2. a kind of tuning fork resonant mode giant-magnetostrictive speaker according to claim 1, it is characterized in that: described super-magnetostrictive drive (2) is made up of giant magnetostrictive rod (6), permanent magnet (5), coil rack (7), solenoid (8), the giant magnetostrictive rod (6) that permanent magnet (5) is housed in the coil rack (7) and is clipped by two blocks of permanent magnets (5), coil rack (7) is around with solenoid (8), and coil rack (7) is contained in the sleeve (9).
3. a kind of tuning fork resonant mode giant-magnetostrictive speaker according to claim 1 is characterized in that: described super-magnetostrictive drive (2) has a plurality of with the combined vibrator of tuning-fork type resonance enlarger (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320173104 CN203181216U (en) | 2013-04-08 | 2013-04-08 | Tuning fork resonant giant magnetostriction speaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320173104 CN203181216U (en) | 2013-04-08 | 2013-04-08 | Tuning fork resonant giant magnetostriction speaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203181216U true CN203181216U (en) | 2013-09-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320173104 Expired - Fee Related CN203181216U (en) | 2013-04-08 | 2013-04-08 | Tuning fork resonant giant magnetostriction speaker |
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| CN (1) | CN203181216U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103260120A (en) * | 2013-04-08 | 2013-08-21 | 杭州电子科技大学 | Tuning fork resonant type ultra-magnetostriction loudspeaker |
-
2013
- 2013-04-08 CN CN 201320173104 patent/CN203181216U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103260120A (en) * | 2013-04-08 | 2013-08-21 | 杭州电子科技大学 | Tuning fork resonant type ultra-magnetostriction loudspeaker |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130904 Termination date: 20150408 |
|
| EXPY | Termination of patent right or utility model |