CN202524556U

CN202524556U - Internal and external support combined double-frequency type piezoelectric bone conduction hearing device

Info

Publication number: CN202524556U
Application number: CN201220173790XU
Authority: CN
Inventors: 林夏怡; 曾平; 程光明; 陈胜辉; 温建明; 阚君武
Original assignee: Zhejiang Normal University CJNU
Current assignee: Zhejiang Normal University CJNU
Priority date: 2012-04-23
Filing date: 2012-04-23
Publication date: 2012-11-07
Anticipated expiration: 2022-04-23

Abstract

The utility model relates to an internal and external support combined double-frequency type piezoelectric bone conduction hearing device and belongs to the field of sound signal propagation. A copper substrate I and a piezoelectric wafer I form a high-resonant-frequency piezoelectric oscillator; a rubber film is fixedly connected with an upper shell and a lower shell; a conducting column I is adhered to the copper substrate and a silica gel plate; an audio signal wire passes through a wire through hole and enters the upper shell; a copper substrate II and a piezoelectric wafer II form a low-resonant-frequency piezoelectric oscillator; a conducting column II is adhered to the lower part of the center of the low-resonant-frequency piezoelectric oscillator; and the conducting column II is adhered to the silica gel plate. The internal and external support combined double-frequency type piezoelectric bone conduction hearing device has the advantages that the structure is novel; a through hole formed in one of the piezoelectric oscillators by cutting is not required; damage to the piezoelectric oscillators and influence on the inverse piezoelectric effect of the piezoelectric oscillators are reduced; a vibrating component has large vibration amplitude and a strong vibration signal; and a good effect on reproduction of the audio signal is achieved. Due to the peripheral support and middle support mode, the inverse piezoelectric effect is obvious and the conduction efficiency is improved.

Description

The inside and outside support combines the double frequency type piezoelectric bone conduction auditory device

Technical field

The utility model relates to the voice signal communication sphere, refers in particular to a kind of piezoelectricity conduction hearing device.

Background technology

Comprise that at present bone conduction auditory devices application such as osteoacusis mobile phone, bone conduction earphone ossiphone are comparatively extensive, bone conduction auditory device is distinguished with dynamo-electric transition form, mainly contains several kinds of electromagnetic type, piezoelectric type, magnetostriction types etc.Now institute ripe what use is the electromagnetic type bone conduction auditory device, but the electromagnetic type bone conduction auditory device exist energy consumption greatly, shortcoming such as Horizon weak effect, electromagnetic interference be big.Magnetostriction type has in advantages such as sound frequency range broad, signal reaction time weak points, but the less shortcoming of stroke makes it be applied in weak effect on the bone conduction auditory device.

The research of the bone conduction auditory device of applying piezoelectric element and and applied more and more, all be the applying piezoelectric wafer as acoustic vibration piezoelectric element major part, comprising single chip architecture, single-chip, twin lamella, laminar structure.All before frequency-division piezoelectric bone conduction auditory devices must cut out through hole in a piezoelectric vibrator therein, and such mechanical wounding damages piezoelectric vibrator easily, influences the effect of its service behaviour and inverse piezoelectric effect.

Summary of the invention

The utility model provides a kind of inside and outside support to combine the double frequency type piezoelectric bone conduction auditory device, to solve the performance of destroying the piezoelectric monocrystal sheet when prior art is carried out machine cuts to the piezoelectric monocrystal sheet, or to influence the problem of its inverse piezoelectric effect.

The technical scheme of the utility model is: copper base one is formed high resonance frequency piezoelectric vibrator with piezoelectric chip one, and upper shell is fixedly connected with lower house, and rubber membrane is fixedly connected with lower house with upper shell; Grume and conductive post one are bonding, and high resonance frequency piezoelectric vibrator is positioned at the upper shell inner upper end, and conductive post one is bonding with copper base one; Conductive post one is bonding with silica gel plate; Audio signal wire passes threading hole and gets into upper shell inside, and high-frequency signal line one is electrically connected with piezoelectric chip one, and high-frequency signal line two is electrically connected with copper base one; Copper base two is formed the low resonant frequency piezoelectric vibrator with piezoelectric chip two; The low resonant frequency piezoelectric vibrator is in high resonance frequency piezoelectric vibrator lower end, and conductive post two is bonding with low resonant frequency piezoelectric vibrator central lower, and conductive post two lower end surface are concordant with the lower end surface of the conductive post one of high resonance frequency piezoelectric vibrator; And it is bonding in silica gel plate; The low frequency signal line one of audio signal wire passes threading hole and is electrically connected with piezoelectric chip two, and low frequency signal line two is electrically connected with copper base two, and silica gel plate is divided into inner ring, outer ring, three part compositions of screw support rack.

The advantage of the utility model is: novel structure; Solved existing piezoelectricity hearing device audio signal has been reproduced the narrow problem of frequency range; And avoided to cut out through hole in a piezoelectric vibrator therein in the structure, reduced, made that the vibrating elements vibration is big to the destruction of piezoelectric vibrator with to its negative piezoelectric effect; Vibration signal is strong, to the existing again effect preferably of audio signal.The mode of perimeter support and intermediate supports makes the piezoelectric inverse effect more obvious, has improved the efficient of conduction.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the structure chart of the silica gel plate of the utility model.

Embodiment

Copper base 1 is formed high resonance frequency piezoelectric vibrator with piezoelectric chip 1, and upper shell 1 is fixedly connected with lower house 11, and rubber membrane 4 is fixedly connected with lower house 11 with upper shell 1; High resonance frequency piezoelectric vibrator is positioned at upper shell 1 inner upper end, and conductive post 1 is bonding with copper base 1, and conductive post 1 is bonding with silica gel plate 2; Grume 10 is bonding with conductive post 1; Audio signal wire 13 passes threading hole 12 and gets into upper shell 1 inside, and high-frequency signal line 1 is electrically connected with piezoelectric chip 1, and high-frequency signal line 2 1302 is electrically connected with copper base 1; Copper base 25 is formed the low resonant frequency piezoelectric vibrator with piezoelectric chip 26; The low resonant frequency piezoelectric vibrator is in high resonance frequency piezoelectric vibrator lower end, and conductive post 27 is bonding with low resonant frequency piezoelectric vibrator central lower, and conductive post 27 lower end surface are concordant with the lower end surface of the conductive post 1 of high resonance frequency piezoelectric vibrator; And it is bonding in silica gel plate 2; The low frequency signal line 1 of audio signal wire 13 passes threading hole 12 and is electrically connected with piezoelectric chip 26, and low frequency signal line 2 1304 is electrically connected with copper base 25, and silica gel plate 2 is divided into inner ring 14,

outer ring

15,16 3 part compositions of screw support rack.

The conductive post 1 of high resonance frequency piezoelectric vibrator did not exert an influence mutually with the conductive post 27 of low resonant frequency piezoelectric vibrator when the design of silica gel plate can make hearing device work; When applying the audio frequency wire size; Audio signal is through handling; High resonance frequency piezoelectric vibrator on high signal is entered, because the resonance frequency of its oscillator is higher, its vibrating effect is better; Drive conductive post 1 and vibrate with rubber membrane 4, do not receive that the low resonant frequency piezoelectric vibrator of audio signal excitation does not just produce vibration with the discontiguous silica gel plate 2 of head.When the audio signal that gets into is a low frequency signal; When getting into the low resonant frequency piezoelectric vibrator; Oscillator drives 27 pairs of silica gel plates of conductive post 2 and vibrates with rubber membrane 8; The high resonance frequency piezoelectric vibrator that does not receive the high audio signal excitation does not vibrate, and the conductive post 3 of high resonance frequency is not exerted an influence.

Claims

1. support inside and outside one kind and combine the double frequency type piezoelectric bone conduction auditory device, it is characterized in that: copper base one is formed high resonance frequency piezoelectric vibrator with piezoelectric chip one, and upper shell is fixedly connected with lower house; Rubber membrane is fixedly connected with lower house with upper shell, and high resonance frequency piezoelectric vibrator is positioned at the upper shell inner upper end, and conductive post one is bonding with copper base one; Conductive post one is bonding with silica gel plate, and grume and conductive post one are bonding, and audio signal wire passes threading hole and gets into upper shell inside; High-frequency signal line one is electrically connected with piezoelectric chip one; High-frequency signal line two is electrically connected with copper base one, and copper base two is formed the low resonant frequency piezoelectric vibrator with piezoelectric chip two, and the low resonant frequency piezoelectric vibrator is in high resonance frequency piezoelectric vibrator lower end; Conductive post two is bonding with low resonant frequency piezoelectric vibrator central lower; Conductive post two lower end surface are concordant with the lower end surface of the conductive post one of high resonance frequency piezoelectric vibrator, and bonding in silica gel plate, and the low frequency signal line one of audio signal wire passes threading hole and is electrically connected with piezoelectric chip two; Low frequency signal line two is electrically connected with copper base two, and silica gel plate is divided into inner ring, outer ring, three part compositions of screw support rack.