CN2664329Y

CN2664329Y - Bone conduction microphone, receiver

Info

Publication number: CN2664329Y
Application number: CN 200320106881
Authority: CN
Inventors: 鹿丙团; 黄程云
Original assignee: Jinan Baochi Electronics Science & Technology Co Ltd
Current assignee: Jinan Baochi Electronics Science & Technology Co Ltd
Priority date: 2003-11-14
Filing date: 2003-11-14
Publication date: 2004-12-15
Anticipated expiration: 2013-11-14

Abstract

The utility model discloses a bone conduction microphone, receiver. The utility model solves problems that the prior bone conduction is complex in structure, high in cost, poor in communication tone, low in definition and easy to produce side effect after being girded. The utility model has the advantages of simple structure, low cost, small size, light weight, comfortable gird, good communication effect and strong nose-proof; the utility model can be cooperated with various broadcasting stations and interphone systems to meet communicating needs of troops, armed police, polices and other special trade workers. The structure of the utility model is that a bone conduction microphone comprises a shell which is characterized in that a signal pick-up device is arranged in the shell; the signal pick-up device is connected with an amplifying circuit by electricity; the amplifying circuit is connected with an output electrode by electricity. A bone conduction receiver which is cooperated with the bone conduction microphone of right demand 1 is characterized in that a magnetic circuit component is provided with a base and a cassette mechanism which is arranged on the base and is made up of alnico and loop into integration; an acoustic vibration component is fixed on the cassette mechanism and the shell by a fastening piece.

Description

Bone conduction, receiver

One, technical field

The utility model relates to a kind of acoustic-electric conduction sound equipment, relates in particular to a kind of bone conduction technology of utilizing and carries out sounding, transaudient electrophone.

Two, background technology

Some position of human body can produce corresponding mechanical oscillation as larynx, cheek, the crown etc. when the people speaks, utilize electronic device that this vibration is converted to audio signal and can carry out communication, has occurred the bone conduction receiver thus.

Traditional bone-conduction microphone generally adopts larynx formula transmitter, and its advantage is that sensitivity is higher, but that shortcoming is a speech intelligibility is relatively poor, wear for a long time in throat and can produce sense of discomfort, even can occur feeling sick, physiological reaction such as allergy.Transmitter transducing mode generally adopts two kinds of carbon granules contact and electromagnetism in addition, poor stability, and complex structure, member is many, and corresponding technological requirement height is made difficulty, the cost height.

Bone-conduction receiver (or being called for short Osseosonometer) also is to utilize human skeleton conduction sound, can be used with bone-conduction microphone.It is after the audio signal that will be received is added to coil, utilizes the effect in magnetic field to make the sheet vibration of shaking, and its frequency is consistent with amplitude and audio signal, and the vibration of oscillator enters by human skeleton and realizes auditory effect in the inner ear.

Present bone-conduction receiver is by stator, vibrating reed, and skeleton frame, magnet steel, coil, skeleton, compositions such as conducting magnetic column, its shortcoming is similarly complex structure, and the member of composition is many, and integrated degree is low, the technological requirement height, and adopt copper material many in the parts, the cost height; Especially the quality of oscillating component is bigger, cause sensitivity low, be that signal must reach certain oscillation intensity, this just requires the audio power must be bigger, cause and be difficult to the problem that is used in combination with the less electronic equipment of power output, be unfavorable for the miniaturization of equipment, bring the inconvenience in the use.

Three, summary of the invention

The utility model is exactly in order to solve the problems referred to above of existing bone conduction, receiver, to provide a kind of simple in structure, the integrated degree height of member, and processing technology is simple, and is easy to use, the high bone conduction receiver of conversation definition.

For achieving the above object, the utility model has adopted following technical scheme: a kind of bone-conduction microphone, and it comprises shell, it is characterized in that: signal pickup device is installed in shell, signal pickup device and amplifying circuit electrically connect, and amplifying circuit then electrically connects with output electrode.

The main composition of described amplifying circuit is: signal pickup device is with after resistance is in parallel, and the grid of a termination field effect transistor, the other end are connected back ground connection with source electrode, and the drain electrode of field effect transistor is connected with output electrode.

Described signal pickup device is made up of the piezoelectric chip of two series connection, and field effect transistor is the 2sk208 type.

A kind of bone-conduction receiver that matches with the described bone-conduction microphone of claim 1, it is by shell, and securing member, magnetic circuit assembly, the sound formations such as assembly of shaking is characterized in that: described magnetic circuit assembly has base and goes up the movement of installing that is made into integration by magnet steel and coil; The sound assembly that shakes then is fixed on movement and the shell by securing member.

Integrally formed fixed leg and conducting magnetic column are arranged on the described base.

Described the assembly that shakes comprises vibrating reed and the stator that is made into integration.

Described vibrating reed is circular, and its middle part is an elliptical openings, equally spacedly on the vibrating reed circumference is provided with four arc openings.

Bone-conduction microphone of the present utility model utilizes bimorph vibration transducing structure, has effectively improved the sensitivity of being talked about, broadening the conversation frequency band.And the quality of bone-conduction microphone is little, only about 1g, can pick up more high-frequency signal, and very favourable to improving speech intelligibility, its frequency response is especially satisfactory for result to high frequency response.And the mechanical impedance height of bone-conduction microphone, the noise that air transmitted is come is insensitive, and very sensitive to the vibration of head, thereby anti-noise ability is strong.Compacted or when vibration when piezoelectric chip, micro-displacement can produce voltage output, output voltage changes the signal of telecommunication into behind corresponding amplifying circuit, the amplifying circuit effect is that the high impedance with bimorph is complementary, and has effectively improved signal to noise ratio, and bone-conduction microphone is installed in the rubber base simultaneously, can wear easily at human body head, avoided wearing the sense of discomfort that produces in throat, its global facility is simple in structure, and cost is effectively reduced.

Bone-conduction receiver of the present utility model has adopted the method that assembly is made into integration, to improve the effect of receiver, promptly direct one is made conducting magnetic column and fixed leg on base, with magnet steel and the coil composition movement that sticks to one, vibrating reed and stator are welded as a whole, thereby have avoided existing receiver that this two assembly also need be installed, and member is many, make difficulty, the problem that technological requirement is high.Whole movement vibrates with audio signal in real work, by selecting vibrating reed coefficient of elasticity and movement quality size, mechanical resonance frequency can be controlled at about 800HZ, guarantee the bottom frequency response, whole movement quality is moderate, has guaranteed big vibrational energy, i.e. high sensitivity, its frequency response width can reach 4KHz, thereby electroacoustic performance is good.Its simple structure of while, used unit is few, has reduced cost.In use it is worn near the human body temple, nearer from ear, guarantee that audio frequency vibration can well import inner ear into by skull, have higher noise immunity.The utility model can be used with systems such as various types of radio station, intercoms, has satisfied special industry personnel's liaison needs.

Four, description of drawings

The utility model is described in further detail below in conjunction with accompanying drawing and embodiment.

Fig. 1 is the structural representation of bone-conduction microphone;

Fig. 2 is the transmitter electrical schematic diagram;

Fig. 3 is the structural representation of bone-conduction receiver;

Fig. 4 vibration plate structure schematic diagram;

Fig. 5 is the work schematic diagram of bone conduction receiver.

Five, embodiment

As shown in Figure 1, bone-conduction microphone shell 1, the piezoelectric chip 2 of two series connection is installed on the shell 1, as shown in Figure 2, the piezoelectric chip 2 of series connection also connects with amplifying circuit 3, and amplifying circuit is that model is the field effect transistor of 2sk208, and piezoelectric chip 2 one ends are connected with the grid of field effect transistor, the other end is connected back ground connection 14 with source electrode, its drain electrode is connected with output electrode 4.Output electrode 4 can connect with the wireless channel that wire message way such as phone or all kinds of radio station form, so that transmission signals.Shell 1 can be placed in the rubber base plate that has a headband, so that wear in head.

Corresponding and the matching used bone-conduction receiver structure of bone-conduction microphone as shown in Figure 3, it has base 7, the fixed leg 5 and the conducting magnetic column 9 that have casting to form on it, coil 10 and magnet steel 8 bonding being integral constitute movement 11 and are installed on the base 7, vibrating reed 12 is circular, as shown in Figure 4, the centre is an elliptical openings, and its broadside and movement 11 are fixing, stator 13 is then welded on narrow limit, thereby becomes one with vibrating reed 12.Stator 13 is fixing with shell 1 again, also equally spacedly on the circumference of vibrating reed 12 is provided with four circular arc openings.So just formed altogether line structure of alternating current-direct current magnetic circuit, guaranteed suitable AC impedance, magnet steel 8 be direct current flux be biased in flux peak about 1/2nd, guaranteed maximum vibration and minimum distortion.

Electrophone of the present utility model both can use separately, also combinable use.Both uses that combine can be formed the most excellent the sending of noiseproof feature and be subjected to telephone system, as shown in Figure 5.Its operation principle is, bone-conduction microphone picks up the vibration signal of people's head when speaking, become the signal of telecommunication, send into transmission medium behind the amplifying circuit of local terminal, transmission medium can be wire message way such as phone etc., also can be wireless channel such as radio station etc., receiving terminal is delivered to bone-conduction receiver after amplifying through audio power, bone-conduction receiver converts audio signal to corresponding audio frequency vibration, send into inner ear by the human body skull, thereby finish the whole process of communication.

Claims

1, a kind of bone-conduction microphone, it comprises shell (1), it is characterized in that: in shell (1) signal pickup device is installed, signal pickup device and amplifying circuit (3) electrically connect, and amplifying circuit (3) then electrically connects with output electrode (4).

2, bone-conduction microphone according to claim 1, it is characterized in that: the main composition of described amplifying circuit (3) is: signal pickup device is with after resistance is in parallel, the grid of one termination field effect transistor, the other end are connected back ground connection with source electrode, the drain electrode of field effect transistor is connected with output electrode (4).

3, bone-conduction microphone according to claim 1 and 2 is characterized in that: described signal pickup device is made up of the piezoelectric chip (2) of two series connection, and field effect transistor is the 2sk208 type.

4, a kind of bone-conduction receiver that matches with the described bone-conduction microphone of claim 1, it is by shell (1), securing member (6), the magnetic circuit assembly, the sound formation such as assembly of shaking is characterized in that: described magnetic circuit assembly has base (7) and goes up the movement of installing (11) that is made into integration by magnet steel (8) and coil (10); The sound assembly that shakes then is fixed on movement and the shell (1) by securing member (6).

5, bone-conduction receiver according to claim 4 is characterized in that: integrally formed fixed leg (5) and conducting magnetic column (9) are arranged on the described base (7).

6, bone-conduction receiver according to claim 4 is characterized in that: described the assembly that shakes comprises vibrating reed (12) and the stator (13) that is made into integration.

7, bone-conduction receiver according to claim 6 is characterized in that: described vibrating reed (12) is for circular, and its middle part is an elliptical openings, equally spacedly on the vibrating reed circumference is provided with four arc openings.