CN203399284U - Cantilever beam type frequency halving piezoelectric bone conduction hearing device - Google Patents
Cantilever beam type frequency halving piezoelectric bone conduction hearing device Download PDFInfo
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- CN203399284U CN203399284U CN201320346199.4U CN201320346199U CN203399284U CN 203399284 U CN203399284 U CN 203399284U CN 201320346199 U CN201320346199 U CN 201320346199U CN 203399284 U CN203399284 U CN 203399284U
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- cantilever beam
- bone conduction
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Abstract
The utility model relates to a cantilever beam type frequency halving piezoelectric bone conduction hearing device, and belongs to a bone conduction hearing device whose sound generating unit is manufactured by dual-wafer piezoelectric oscillators. Two piezoelectric oscillators which are different in structure and size both adopt a cantilever beam type supporting mode. End parts of two conduction posts maintain parallel and contact a skull via a contact membrane. Advantages of the cantilever beam type frequency halving piezoelectric bone conduction hearing device are that cantilever beam type piezoelectric oscillators have a lower first order resonant frequency in comparison with other supporting modes. With application of the cantilever beam type supporting mode, first order resonant frequency of low-frequency piezoelectric oscillators can be further lowered so that sound generating loudness in a low-frequency area of the hearing device is enhanced. Another piezoelectric oscillator adopting the cantilever beam type supporting mode acts as a sound generating unit in medium and high-frequency areas so that a problem that an audio signal reproduced by a single piezoelectric oscillator is narrow in frequency band is solved. Meanwhile, with application of the cantilever beam type supporting mode, size of the piezoelectric oscillator can be properly reduced, and thus size of the whole structure is reduced.
Description
Technical field
The utility model relates to a kind of novel bone conduction auditory device of twin lamella piezoelectric vibrator as vibration sounding element of usining, particularly, sound generating device is two piezoelectric vibrators that all adopt beam type supporting way, both reduced the resonance frequency of low frequency piezoelectric vibrator, solve again single piezoelectric vibrator audio signal has been reproduced to the narrow problem of frequency band, also reduced the overall structure size of hearing device simultaneously.
Background technology
Wear-type piezoelectric bone conduction auditory device mainly adopts single piezoelectric vibrator as acoustic vibration element, and single piezoelectric vibrator only can make near the audio signal its resonance frequency be able to good reproduction, and response band is narrow.And its resonance frequency is higher, often LF-response is not enough.The thought of frequency-division piezoelectric bone conduction auditory device forms at present, but physical dimension is bigger than normal, wears inconvenience.The piezoelectric vibrator of beam type has lower resonance frequency than the piezoelectric vibrator of other supporting way of same size.
Summary of the invention
The utility model provides a kind of beam type two divided-frequency piezoelectric bone conduction auditory device, two supporting way that piezoelectric vibrator is all beam type that adopt, the resonance frequency that has reduced low frequency piezoelectric vibrator, has reduced piezoelectric vibrator physical dimension, and then reduces the overall structure size of hearing device.
The technical solution adopted in the utility model is: copper base and piezoelectric ceramic wafer form twin lamella piezoelectric vibrator, equal one end of piezoelectric vibrator of two different size sizes is fixed by rubber strip and bottom, the other end is all fixed with conductive post, two conductive post upper surfaces are concordant and be coated with contact membranes, and while upper cover has through hole two conductive post are passed.Piezoelectric vibrator size used is less, and the cross section that therefore conductive post lower end used contacts with piezoelectric vibrator is that the cross section that two less rectangle ，Er upper ends of area contact with contact membranes is two larger semicircles, so that contact with people's skull.
In the structure that the utility model provides, there is the piezoelectric vibrator of two kinds of different resonance frequencys, audio signal is through processing, low frequency signal enters the piezoelectric vibrator that resonance frequency is lower, and high-frequency signal enters the piezoelectric vibrator that resonance frequency is higher, and the audio signal of different frequency is fully reproduced.
The utility model has the advantages that: low frequency piezoelectric vibrator adopts beam type supporting way to solve existing wear-type piezoelectric bone conduction auditory device to the sufficient not problem of low-frequency sound signal reproduction, adopt another piezoelectric vibrator of beam type supporting way as the sound generating device in medium, high frequency region simultaneously, solved single piezoelectric vibrator audio signal is reproduced to the narrow problem of frequency band.Beam type supporting way piezoelectric vibrator resonance frequency is low, can suitably reduce the size of piezoelectric vibrator, and then reduces integrally-built size.
Accompanying drawing explanation
Fig. 1 is the overall structure cutaway view of piezoelectricity bone conduction earphone
Fig. 2 is two conductive post used upward views from bottom to top
Wherein, 1-base; 2-copper base one; 3-piezoelectric bimorph one; 4-conductive post one; 5-contact membranes; 6-conductive post two; 7-rubber bar one; 8-piezoelectric bimorph two; 9-copper base two; 10-rubber bar two; 11-upper cover; 12-wire hole; 13-wire.
Embodiment
Piezoelectric vibrator ，Qi one end that copper base one (2) and piezoelectric bimorph one (3) form high resonance frequency is fixed on base, and (on 1, by rubber bar one (7), pushed down, the other end is pasted conductive post one (4).Copper base two (9) is fixed on base (1) above with piezoelectric vibrator ，Qi one end that piezoelectric bimorph two (8) forms low resonant frequency, by rubber bar two (10), is pushed down, and the other end is pasted conductive post two (6).Conductive post one (4) is concordant with conductive post two (6) upper ends and contact with contact membranes (5) simultaneously.The audio signal wire of two piezoelectric vibrators (13) is all connected with signal generator through the wire hole on base (12).
Beam type piezoelectric vibrator size is less, and the area that the area Ye Hen little ， upper end that two conductive post bottoms contact with piezoelectric vibrator contacts with contact membranes increases and is designed to two semicircles, is convenient to contact with people's skull.
When applying audio signal, audio signal is through processing, be divided into high and low two different frequency ranges, when only having high-frequency signal to enter hearing device, it just causes the vibration of the high resonance frequency piezoelectric vibrator that place lower end, and causing that by guide pillar one crinial bone vibrates, the low frequency piezoelectric vibrator that is not subject to audio signal excitation does not produce vibration; When the audio signal entering only has low frequency signal, only have the low frequency piezoelectric vibrator vibration of upper end and by corresponding conductive post two, cause the vibration of crinial bone, the high frequency piezoelectric vibrator that not being subject to low frequency signal stimulates does not vibrate; When the signal of two kinds of frequency ranges exists simultaneously, two piezoelectric vibrators vibrate simultaneously, and drive corresponding conductive post to vibrate and cause the vibration of crinial bone.The vibration of crinial bone is passed to inner ear by sound wave, the endolymph fluid compression flow in cochlea, and extruding hair cell, finally passes to auditory center and makes people's perceives sound signal.
Claims (2)
1. beam type two divided-frequency piezoelectric bone conduction auditory device, it is characterized in that: copper base and piezoelectric ceramic wafer form twin lamella piezoelectric vibrator, equal one end of piezoelectric vibrator of two different size sizes is fixed by rubber strip and bottom, the other end is all fixed with conductive post, two conductive post upper surfaces are concordant and be coated with contact membranes, and while upper cover has through hole two conductive post are passed.
2. beam type two divided-frequency piezoelectric bone conduction auditory device according to claim 1, its feature is: piezoelectric vibrator size used is less, therefore the cross section that conductive post lower end used contacts with piezoelectric vibrator is two rectangles that area is less, and the cross section that upper end contacts with contact membranes is two larger semicircles, so that contact with people's skull.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320346199.4U CN203399284U (en) | 2013-06-07 | 2013-06-07 | Cantilever beam type frequency halving piezoelectric bone conduction hearing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320346199.4U CN203399284U (en) | 2013-06-07 | 2013-06-07 | Cantilever beam type frequency halving piezoelectric bone conduction hearing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203399284U true CN203399284U (en) | 2014-01-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320346199.4U Expired - Fee Related CN203399284U (en) | 2013-06-07 | 2013-06-07 | Cantilever beam type frequency halving piezoelectric bone conduction hearing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203399284U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103929702A (en) * | 2014-04-17 | 2014-07-16 | 北京信息科技大学 | Double-piezoelectric-type bone conduction auditory device based on displacement amplification |
| CN107710781A (en) * | 2015-06-17 | 2018-02-16 | 第精工株式会社 | Earphone |
-
2013
- 2013-06-07 CN CN201320346199.4U patent/CN203399284U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103929702A (en) * | 2014-04-17 | 2014-07-16 | 北京信息科技大学 | Double-piezoelectric-type bone conduction auditory device based on displacement amplification |
| CN103929702B (en) * | 2014-04-17 | 2017-01-18 | 北京信息科技大学 | Double-piezoelectric-type bone conduction auditory device based on displacement amplification |
| CN107710781A (en) * | 2015-06-17 | 2018-02-16 | 第精工株式会社 | Earphone |
| CN107710781B (en) * | 2015-06-17 | 2020-05-12 | 第一精工株式会社 | Earphone set |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140115 Termination date: 20140607 |