CN2237914Y - Wireless hearing aid - Google Patents

Abstract

A wireless hearing aid for transmitting signals by radio method features that its sound pick-up is completely separated from earphone, the carrier, modulation and emitting circuits are added to sound pick-up to form sound pick-up emitter, and the receiving, high-level amplifying and demodulating circuits are added to earphone to form earphone receiver, so realizing the hearing aid function from sound pick-up to receiving and amplifying. The wireless hearing aid can bring convenience to the learning, working, living and sports of users.

Description

Wireless hearing aids

The utility model relates to the electronics auditory prosthesis that a kind of human body uses, specifically a kind of wireless hearing aids.

At present, general hearing aids is made up of pickup transmitter, microphone signal amplifying circuit, volume potentiometer, power amplifier and wired earphone.The voice signal that pickup transmitter is sensed is undertaken just putting by the microphone signal amplifying circuit, delivers to power amplifier through potentiometer again and carries out power amplifier, delivers to earphone by line again, makes the vibration of earphone vibrating membrane, sounding, finishes hearing-aid function.But have thin wire to connect between the pick-up of this hearing aids part and the earphone, this causes many inconvenience for user's study, work, life and motion.

The purpose of this utility model is to provide a kind of novel hearing aids, it separates pick-up part and earphone portion fully, the centre does not have line, partly install pick-up additional carrier wave, modulation and radiating circuit, make it to become the pickup reflector, reception, demodulation and power amplifier are housed in the earphone, make it to become the earphone receiver, to reach the function that does not need line can finish hearing aid between the two in the same old way.

By the wireless hearing aids that the utility model proposed, it is by forming as the pickup reflector box of pickup and signal emission with as the earphone receiver of signal reception and amplification, adopt radio method to transmit signal between them, therefore, pickup reflector box and earphone receiver are two disjunct parts, pickup reflector box is loaded in the box by the pickup reflector to be formed, it comprises following circuit: voice signal receives via pickup transmitter, behind amplifying circuit, connect volume control potentiometer and enter modulation circuit then, the carrier signal of modulation circuit is produced by carrier wave generation circuit, audio signal by potentiometer output enters radiating circuit after modulating circuit modulates, gone out by transmission antennas transmit; Foregoing circuit is made circuit board, add power supply and switch composition pickup reflector box; The earphone receiver is loaded in the earplug by receiver to be formed, its circuit is: transmitting enters High Amplifier Circuit through receiving circuit, solve audio signal to the power amplifier amplification through demodulator circuit again, enter voice coil, be made into circuit board, add power supply, switch, be loaded in the earphone, form the earphone receiver.

Above-mentioned all circuit all are known circuits.

Fig. 1 is the circuit theory diagrams of pickup reflector.

Fig. 2 is the circuit block diagram of pickup reflector.

Fig. 3 is the circuit theory diagrams of earphone receiver.

Fig. 4 is the circuit block diagram of earphone receiver.

Fig. 5 is an outside drawing of the present utility model.

Fig. 6 is the structure chart of pickup reflector.

Fig. 7 is the profile of earphone receiver.

Embodiment is explained in detail the utility model below in conjunction with accompanying drawing.

Pickup reflector of the present utility model is a small-sized portable box, and avris has pickup hole (20), belt switch K₁Volume potentiometer W₁And stretch out soft transmitting antenna TX (16),₁(17), the end is that antenna buckles (18), and antenna inside is the soft type metal, and the outside is surrounded by insulating fabrics, and battery compartment lid (19), interior dress dry cell E are arranged at box top₁(14), printed circuit board (PCB) (15) is housed in the box, the circuit element of pickup radiating portion all is printed on.It is as follows that pickup is launched electric functional-block diagram: voice signal is received by pickup transmitter S (21), after amplifying circuit (22) amplifies, through volume potentiometer W₁(23) arrive modulation circuit (25), the carrier signal of modulation circuit is produced by oscillating circuit (24), carrier signal is gone out by transmission antennas transmit through radiating circuit (26) through after carrying out amplitude modulation(PAM) by the audio signal of volume potentiometer output, and (27) are mains switch.In Fig. 1, dashed region (21) is by resistance R₁, capacitor C₁Finish the microphone pickup function jointly with microphone S, amplifying circuit (22) is by resistance R₂, R₃, R₄, R₅, capacitor C₂, triode BG₁, BG₂Finish the microphone signal amplification, in (23) by volume potentiometer W₁Finish volume control function, in the carrier wave generation circuit (24) by resistance R₆, R₇, capacitor C₃, C₄, C₅, C₆, C₇, inductance L₁With triode BG₃Finish carrier wave and take place, in the modulation circuit (25) by resistance R₈, R₉, capacitor C₈With triode BG₄Finish modulation function, in the radiating circuit (26) by resistance R₁₀, capacitor C₉, inductance L₂With transmitting antenna TX₁Finish emission function, E in (27)₁Be power supply, i.e. battery (14), mains switch K₁Be attached on the volume potentiometer.

Earphone receiver of the present utility model is a small-sized wireless earbud, as shown in Figure 7, in the electrode reed (1) in receiver bonnet (4), button cell E is housed₂(2), (5) be the receiver shell, (6) be printed circuit board (PCB), the circuit element that has comprised the entire headset receiver, (3) be dielectric film, electrode reed (1) and printed circuit board (PCB) (6) separated that (7) are exposed reception antenna contact, be positioned at the avris of earphone head, constitute induction reception antenna TX with human body contact back₂(8) be the earphone annular magnet, (9) be voice coil SP, (10) are isolated film, and (11) are vibrating reed, they are loaded on the head of earphone successively, for making the earphone head contact soft comfort, be with flexible plastics ear muff (12) at the earphone head, at earphone rear portion avris with people's ear, mains switch (13) is housed, i.e. K among Fig. 3₂It is as follows that earphone receives functional-block diagram: because the antenna contact on the earphone receiver is touched human body, delivering to high-frequency amplifier circuit (29) by human body sensing through antenna contact receiving circuit (28) when the radio wave that is sent by the pickup reflector amplifies, signal after the amplification detects high-frequency signal through demodulator circuit (30), this high-frequency signal is delivered to voice coil (32) after power amplification circuit (31) amplifies, make the vibrating membrane sounding by electromagnetic induction, thereby reach the hearing aid purpose.(33) be power supply and switch.Among Fig. 3, in the dashed region receiving circuit (28) by capacitor C₁₂, reception antenna TX₂Receive the high frequency radio signal that the pickup reflector sends, in the High Amplifier Circuit (29) by resistance R₁₂, R₂₂, triode BG₁₂Finish the high-frequency signal enlarging function, in the demodulator circuit (30) by diode D₁, capacitor C₂₂Finish demodulation function, in the power amplifier (31) by resistance R₃₂, R₄₂, R₅₂, R₆₂, capacitor C₃₂, C₄₂With triode BG₂₂, BG₃₂Finish the audio signal amplification, (32) are voice coil SP, in (33), and C₅₂Be filter capacitor, E₂Be button cell, K₂Be mains switch.

When using the utility model, as long as in pickup reflector box, load onto battery (14), open potentiometer switch (16), in the earphone receiver, load onto battery (2), open switch (13), pickup reflector box is placed in waist or the pocket, antenna (17) pulls out, the earphone receiver is inserted in the ear, then can hear the voice signal of amplification in the ear, regulate volume adjuster to suitable loudness again and can use.

The utility model adopts common components and parts, and the earphone receiver partly adopts the sheet components and parts, has reduced the volume and weight of earphone, does not tie down owing to earphone has line, so use very convenient practicality.

Claims (3)

1, a kind of electronic wireless hearing aids of human body use, it is made up of pick-up and earphone, it is characterized by pickup reflector box and earphone receiver is two disjunct parts, pickup reflector box is loaded in the box by the pickup reflector to be formed, it comprises following circuit: pickup transmitter connects volume control potentiometer after connecting amplifying circuit, be connected to modulation circuit then, the carrier signal of modulation circuit is produced by carrier wave generation circuit, the output of modulation circuit is connected to radiating circuit, by transmitting antenna signal is launched; Foregoing circuit is made circuit board, add power supply and switch composition pickup reflector box; The earphone receiver is loaded in the earplug by receiver to be formed, and its circuit is: receiving circuit connects High Amplifier Circuit, connects demodulator circuit again, after exporting power amplifier to by demodulator circuit, enter voice coil, be made into circuit board, add power supply, switch, be loaded in the earphone, form the earphone receiver.

2, by the described wireless hearing aids of claim 1, it is characterized by pickup reflector box avris and stretch out soft transmitting antenna, the end is that antenna buckles.

3, it is characterized in that avris at earphone receiver head exposed reception antenna contact being housed by claim 1 or 2 described wireless hearing aids.

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