CN201708923U - Frequency-dividing type piezoelectric osteoacusis auditory device - Google Patents

Abstract

The utility model relates to a frequency-dividing type piezoelectric osteoacusis auditory device which belongs to an osteoacusis auditory device taking piezoelectric twin crystal chips as acoustic vibration elements. The frequency-dividing type piezoelectric osteoacusis auditory device includes two piezoelectric vibrators with different resonant frequencies; the conduction post of the piezoelectric vibrator with high resonant frequency is stuck on the center of the piezoelectric crystal chip at one side of the piezoelectric vibrator; the center of the piezoelectric vibrator with low resonant frequency is provided with a through hole; a hollow conduction post is fixed in the center of the piezoelectric vibrator with low resonant frequency; the conduction post of the piezoelectric vibrator with high resonant frequency passes through the central hole of the conduction post with low resonant frequency and is not contacted with the conduction post; the end surfaces of the two conduction posts are parallel, and are simultaneously and firmly stuck with a silica gel plate connected with a rubber film contacted with a skin surface. The frequency-dividing type piezoelectric osteoacusis auditory device has the advantages of solving the problem that the current piezoelectric osteoacusis auditory device has narrow regenerating frequency range on audio signals; moreover, the vibration force of the acoustic vibration elements is large; the vibration signals are strong, and the regeneration effects on the audio signals are better.

Description

Frequency-division piezoelectric bone conduction auditory device

Technical field

The utility model relates to the novel bone conduction auditory device of a kind of piezoelectric bimorph as the acoustic vibration element, particularly, be used for the high frequency of audio signal and low frequency the acoustic vibration signal of the piezoelectric bimorph conversion adult institute energy perception by two kinds of different resonance frequencys respectively, make the people can perceives sound.

Background technology

Comprise that at present bone conduction auditory devices such as osteoacusis mobile phone, bone conduction earphone, ossiphone use comparatively extensively, bone conduction auditory device is distinguished with dynamo-electric transition form, and it is several to mainly contain electromagnetic type, piezoelectric type, magnetostriction type etc.Ripe use is the electromagnetic type bone conduction auditory device now, but there are shortcomings such as energy consumption is big, low-frequency effect is poor, electromagnetic interference is big in the electromagnetic type bone conduction auditory device.Magnetostriction type has in advantages such as sound frequency range broad, signal reaction time are short, and is relatively poor but the less shortcoming of stroke makes it be applied on the bone conduction auditory device effect.

The bone conduction auditory device Recent study of applying piezoelectric element is more, and uses more and morely, all is the applying piezoelectric wafer as the piezoelectric element major part of acoustic vibration, comprising single chip architecture: single-chip, twin lamella, laminar structure.The frequency of people's osteoacusis institute perceives sound sensitizing range is 800Hz-2500Hz, and the piezoelectric element of piezoelectric bone conduction auditory device is subjected to the constraint of size, its resonance frequency is all more than 1kHz, so the structural research of piezoelectric bone conduction auditory device design at present mainly is with the resonance frequency that reduces piezoelectric chip, low mechanical quality factor Q as a reference.But the existing piezoelectric bone conduction auditory device of using just makes the close audio signal of its resonance frequency be reproduced, and the reproduction of the audio signal of upper frequency or lower frequency is undesirable.

Summary of the invention

The utility model provides a kind of frequency-division piezoelectric bone conduction auditory device, to solve piezoelectric element audio signal is reproduced the narrower problem of response frequency range.The technical scheme that the utility model is taked is: conducting strip is connected with the upper shell internal fixation, and air vent hole is arranged in the upper shell, and lower house is fixedlyed connected with upper shell, and rubber membrane is fixedlyed connected with lower house; Piezoelectric chip one, copper base one are formed high resonance frequency piezoelectric vibrator, high resonance frequency piezoelectric vibrator is fixed on upper shell inside in upper shell inner upper end, copper base one outside by trim ring, piezoelectric chip one adopts parallel way to connect signal power source, audio signal wire enters upper shell inside through threading hole, wherein the twin lamella of high-frequency signal line and piezoelectric chip one is connected in parallel, and the audio signal baseline is connected with the metal trim ring or with conducting strip; High resonance frequency piezoelectric vibrator and upper shell form air cavity, and upper shell is inner bonding with sound-absorbing material; The conductive post top is bonding with high resonance frequency piezoelectric vibrator central lower and pass low resonant frequency and press the centre bore of the hollow conductive post of oscillator to contact with silica gel plate to be connected by resin glue; Piezoelectric chip two, copper base two are formed the low resonant frequency piezoelectric vibrator, the low resonant frequency piezoelectric vibrator is in high resonance frequency piezoelectric vibrator lower end, copper base two is fixed on upper shell inside by the metal trim ring, low frequency signal line of the audio signal wire of logical cable-through hole is connected in parallel with the twin lamella of piezoelectric chip two, pastes and this piezoelectric chip two identical annular silicane rubber plates greatly in piezoelectric chip two upper ends one side; Have centre bore that externally threaded hollow conductive post sees through the low resonant frequency piezoelectric vibrator with nut be fixed on the low resonant frequency piezoelectric vibrator, its underpart end face is concordant with the lower end surface of the conductive post of high resonance frequency oscillator, contact with silica gel plate simultaneously to be connected; Four air vent holes communicate with high resonance frequency piezoelectric vibrator and upper shell formation air cavity in the upper shell, and conducting strip connects copper base one and copper base two respectively.

The utility model provides the piezoelectric vibrator of two different resonance frequencys, the conductive post of high resonance frequency piezoelectric vibrator sticks on the piezoelectric chip center of piezoelectric vibrator one side, low resonant frequency piezoelectric vibrator center has open-work, hollow conductive post is to have having of centre bore of externally threaded structure, be fixed on the piezoelectric vibrator center, the conductive post of high resonance frequency oscillator is by the centre bore of low resonant frequency conductive post, two conductive post are gapped each other, do not produce contact, two conductive post end faces are concordant, continuous with contacting the skin surface rubber membrane simultaneously silica gel plate is sturdy, the vibration that audio signal produced of different frequency, conductive post by two oscillators passes to silica gel plate respectively, contacts with the human skull via rubber membrane, is received by the human skull again.The piezoelectric vibrator of two kinds of different resonance frequencys of installing, audio signal is through handling, low frequency signal enters the lower piezoelectric vibrator of resonance frequency, and high-frequency signal then enters the high relatively oscillator of resonance frequency, makes existing again better effects of the audio signal of different frequency.

The advantage that the utlity model has is: solves existing piezoelectric bone conduction auditory device audio signal reproduced the narrow problem of frequency range, and because peripheral fixed form, acoustic vibration vibration of element power is big, and vibration signal is strong, to the existing again effect preferably of audio signal.

Description of drawings

Fig. 1 is an overall structure cutaway view of the present utility model;

Fig. 2 is a primary structure amplification view of the present utility model;

Fig. 3 is the interior views of the upper shell of the utility model device.

Fig. 4 is the upward view of Fig. 3.

Embodiment

Conducting strip 20 is connected with upper shell 10 internal fixation, and air vent hole 11 is arranged in the upper shell, and lower house 13 is fixedlyed connected with upper shell, and rubber membrane 15 is fixedlyed connected with lower house; Piezoelectric chip 1, copper base 1 are formed high resonance frequency piezoelectric vibrator, high resonance frequency piezoelectric vibrator is fixed on upper shell inside in upper shell inner upper end, copper base one outside by trim ring 3, piezoelectric chip one adopts parallel way to connect signal power source, audio signal wire 2 enters upper shell inside through threading hole 1, wherein the twin lamella of high-frequency signal line and piezoelectric chip one is connected in parallel, and the audio signal baseline is connected with metal trim ring 3 or with conducting strip 20; High resonance frequency piezoelectric vibrator and upper shell form air cavity, and upper shell is inner bonding with sound-absorbing material 6; Conductive post 17 tops are bonding with high resonance frequency piezoelectric vibrator central lower and pass low resonant frequency and press the centre bore of the hollow conductive post 8 of oscillator to contact with silica gel plate 16 to be connected by resin glue 7;

Piezoelectric chip 2 19, copper base 2 14 are formed the low resonant frequency piezoelectric vibrator, the low resonant frequency piezoelectric vibrator is in high resonance frequency piezoelectric vibrator lower end, copper base 2 14 is fixed on upper shell inside by metal trim ring 12, low frequency signal line of the audio signal wire 2 of logical cable-through hole 1 is connected in parallel with the twin lamella of piezoelectric chip two, pastes and this piezoelectric chip two identical annular silicane rubber plates 9 greatly in piezoelectric chip two upper ends one side; Have centre bore that externally threaded hollow conductive post 8 sees through the low resonant frequency piezoelectric vibrator with nut 18 be fixed on the low resonant frequency piezoelectric vibrator, its underpart end face is concordant with the lower end surface of the conductive post 17 of high resonance frequency oscillator, the while contacts with silica gel plate 16 and is connected;

Four air vent holes 11 communicate with high resonance frequency piezoelectric vibrator and upper shell formation air cavity in the upper shell, and conducting strip connects copper base one and copper base two respectively.

When applying audio signal, audio signal is through handling, high-frequency signal enters the high resonance frequency piezoelectric vibrator in upper end, because the resonance frequency of its oscillator is higher, its vibrating effect is better, drive conductive post pair silica gel plate that contacts with the head part 16 and rubber membrane 15 and vibrate, the lower end piezoelectric vibrator that is not subjected to the audio signal excitation does not just produce vibration.When the audio signal that enters is a low frequency signal, when entering the lower end piezoelectric vibrator, oscillator drives 8 pairs of silica gel plates 16 of hollow conductive post and rubber membrane 15 vibrates, and the upper end piezoelectric vibrator that is not subjected to the bass signal excitation does not vibrate, and the conductive post 17 of upper end oscillator is not exerted an influence.

Claims (1)

1. frequency-division piezoelectric bone conduction auditory device, it is characterized in that: conducting strip is connected with the upper shell internal fixation, and air vent hole is arranged in the upper shell, and lower house is fixedlyed connected with upper shell, and rubber membrane is fixedlyed connected with lower house; Piezoelectric chip one, copper base one are formed high resonance frequency piezoelectric vibrator, high resonance frequency piezoelectric vibrator is fixed on upper shell inside in upper shell inner upper end, copper base one outside by trim ring, piezoelectric chip one adopts parallel way to connect signal power source, audio signal wire enters upper shell inside through threading hole, wherein the twin lamella of high-frequency signal line and piezoelectric chip one is connected in parallel, and the audio signal baseline is connected with the metal trim ring or with conducting strip; High resonance frequency piezoelectric vibrator and upper shell form air cavity, and upper shell is inner bonding with sound-absorbing material; The conductive post top is bonding with high resonance frequency piezoelectric vibrator central lower and pass low resonant frequency and press the centre bore of the hollow conductive post of oscillator to contact with silica gel plate to be connected by resin glue; Piezoelectric chip two, copper base two are formed the low resonant frequency piezoelectric vibrator, the low resonant frequency piezoelectric vibrator is in high resonance frequency piezoelectric vibrator lower end, copper base two is fixed on upper shell inside by the metal trim ring, low frequency signal line of the audio signal wire of logical cable-through hole is connected in parallel with the twin lamella of piezoelectric chip two, pastes and this piezoelectric chip two identical annular silicane rubber plates greatly in piezoelectric chip two upper ends one side; Have centre bore that externally threaded hollow conductive post sees through the low resonant frequency piezoelectric vibrator with nut be fixed on the low resonant frequency piezoelectric vibrator, its underpart end face is concordant with the lower end surface of the conductive post of high resonance frequency oscillator, contact with silica gel plate simultaneously to be connected; Four air vent holes communicate with high resonance frequency piezoelectric vibrator and upper shell formation air cavity in the upper shell, and conducting strip connects copper base one and copper base two respectively.

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