CN100571296C

CN100571296C - Be fit to listen the barrier person to use multi-function device

Info

Publication number: CN100571296C
Application number: CNB2007100691993A
Authority: CN
Inventors: 程义和
Original assignee: HONGLI ELECTRONIC CO Ltd QUZHOU
Current assignee: HONGLI ELECTRONIC CO Ltd QUZHOU
Priority date: 2007-06-05
Filing date: 2007-06-05
Publication date: 2009-12-16
Anticipated expiration: 2027-06-05
Also published as: CN101068270A

Abstract

Be fit to listen the barrier person to use multi-function device, by casing, the Telephone set port of casing periphery, handle and traffic ear mark interface, hearing aid earphone interface and circuit are formed, in the circuit, the input of function selector circuit respectively with voice pickup circuit, the output of call voice coupling circuit is electrically connected, the output of function selector circuit is electrically connected with the input of audio power amplifying circuit, the Telephone set port respectively with audio power amplifying circuit, the call voice coupling circuit, the input of signal switching circuit is electrically connected, and power circuit is respectively each element circuit working power is provided; Handle and traffic ear mark interface, hearing aid earphone interface are arranged on the output of audio power amplifying circuit.The present invention collects functions such as hearing aid, phone amplify, FM radio in a machine, has fully satisfied tin barrier person and special occasions hearing normal person's user demand, has the advantage that function is complete, simple in structure, easy to carry, use cost is low.

Description

Be fit to listen the barrier person to use multi-function device

Technical field

The present invention relates to a kind of device that uses for the person that listens to the barrier, especially belong to a kind of for the person that listens to the barrier use have hearing aid, listen to, multi-function device such as FM radio, phone amplify.

Background technology

In the prior art, the products such as frequency modulation type broadcast receiver that are similar to hearing aids, articulator and are fit to listen the barrier person to listen to are given and are listened a barrier person to bring convenience, make them can be as hearing normal person life and work.But, the said goods all exists with single product in known technology, listen the barrier person if enjoy the function that all products have, just must singlely buy one by one, use cost height not only, and carry, use also inconvenience, moreover, as FM radio, TV are listened to, can only realize,, make the consumer feel tired brain very much if ambient noise will influence audibility greatly by the traditional hearing aid mode.If can develop a kind of multi-function device, above-mentioned functions is integrated in one, satisfy to listen a barrier person to select for use, be bound to dark barrier person's pleasant to hear favor of the appearance of this product.

Summary of the invention

For overcoming the above-mentioned deficiency of prior art, the present invention aims to provide a kind ofly to have novel structure, is particularly suitable for listening a barrier person to use multi-function device, this device amplifies hearing aid, phone and function such as frequency modulation type radio reception is integrated in one, can satisfy and listen the barrier person to select for use as required, also be adapted at special occasions, for example use for the hearing normal person, and have advantage simple in structure, easy to carry, that use cost is low in the big place of noises such as steel mill, cement plant.

Realize that the above-mentioned purpose technical scheme is as follows: this suitable barrier person of listening uses multi-function device, comprise a casing, and Telephone set port, handle and the traffic ear mark interface, the hearing aid earphone interface that are located at this casing periphery, Telephone set port, handle and traffic ear mark interface, the hearing aid earphone interface is connected with circuit in the casing through lead; Circuit comprises voice pickup circuit, call voice coupling circuit, power circuit, it is characterized in that: also comprise signal switching circuit, function selector circuit and audio power amplifying circuit in the circuit; The input of function selector circuit is electrically connected with the output of voice pickup circuit, call voice coupling circuit respectively, the output of function selector circuit is electrically connected with the input of audio power amplifying circuit, the Telephone set port is electrically connected with the input of audio power amplifying circuit, call voice coupling circuit, signal switching circuit respectively, and power circuit is respectively each element circuit working power is provided; Handle and traffic ear mark interface, hearing aid earphone interface are arranged on the output of audio power amplifying circuit.

A described this suitable tin barrier person uses multi-function device, it is characterized in that: in circuit, also be provided with wireless audio signal reception and fm radio circuit, wireless audio signal radiating circuit, wireless audio signal receives and the output of fm radio circuit is electrically connected with the input of function selector circuit, and the wireless audio signal radiating circuit is serially connected on the corresponding sound source circuit.

A described this suitable tin barrier person uses multi-function device, and it is characterized in that: power circuit is made up of battery, direct-current switch power supply, relay, and battery is connected with the relay normally-closed contact, and direct-current switch power supply is connected with relay normally open contact.

Beneficial effect: compared with prior art, the present invention is on the basis of original voice pickup circuit, call voice coupling circuit, by setting up signal switching circuit, function selector circuit and audio power amplifying circuit, single hearing aid, phone sound amplification function are integrated in one, and after setting up wireless audio signal reception and fm radio circuit, wireless audio signal radiating circuit as required, listen the barrier person can select handle, traffic ear mark easily as required for use, hearing aid earphone obtains good radio reception, hearing aid effect.This device can satisfy listens the barrier person to select for use as required, also is adapted at special occasions, for example uses for the hearing normal person in the big place of noises such as steel mill, cement plant, compares with all single products, has advantage simple in structure, easy to carry, that use cost is low.Moreover, power circuit is modified into the duplicate supply input, not only available battery can also be used direct-current switch power supply, can automatically switch between two groups of power supplys, adopts civil power to convert direct current to and helps reducing use cost as power supply.

Description of drawings

Fig. 1 is a structural representation of the present invention.

Fig. 2 is a schematic block circuit diagram.

Fig. 3 is circuit theory diagrams.

Fig. 4 is the wireless audio signal radiating circuit schematic diagram among Fig. 2.

Embodiment

Sequence number is represented respectively among the figure: Telephone set A, call voice coupling circuit 2, signal switching circuit 3, power circuit 4, wireless audio signal receives and fm radio circuit 5, voice pickup circuit 6, function selector circuit 7, audio power amplifying circuit 8, handle and traffic ear mark interface 9, hearing aid earphone interface 10, wireless audio signal radiating circuit 11, circuit board 100.

Referring to Fig. 1.The figure shows the structure situation of present embodiment, circuit board 100 is provided with in the enclosure, and it is connected with traffic ear mark interface 9, hearing aid earphone interface 10, Telephone set A through the handle of lead with the periphery respectively.Wherein, handle and traffic ear mark interface 9 can be provided with in two ways, and a kind of is to connect an interface, and this interface can be admitted the plug of handle, traffic ear mark respectively; Another kind is that two parallel interfaces are set, and is changed by the two-way choice switch.

Referring to Fig. 2.The figure shows the schematic block circuit diagram structure of present embodiment, as seen from the figure, this suitable tin barrier person comprises Telephone set port one, call voice coupling circuit 2, signal switching circuit 3 with the circuit of multi-function device, power circuit 4, wireless audio signal receives and fm radio circuit 5, voice pickup circuit 6, function selector circuit 7, audio power amplifying circuit 8, handle and traffic ear mark interface 9, hearing aid earphone interface 10, wireless audio signal radiating circuit 11.The input of function selector circuit 7 is electrically connected with the output of voice pickup circuit 6, call voice coupling circuit 2 respectively, the output of function selector circuit 7 is electrically connected with the input of audio power amplifying circuit 8, the Telephone set port one is electrically connected with the input of audio power amplifying circuit 8, call voice coupling circuit 2, signal switching circuit 3 respectively, and power circuit 4 is respectively each element circuit working power is provided; Handle and traffic ear mark interface 9, hearing aid earphone 10 is arranged on the output of audio power amplifying circuit 8.Connecting line between signal switching circuit 3 and handle and the traffic ear mark interface 9 is represented: the transmitter signal of Telephone set port one is directly switch on the transmitter of handle and traffic ear mark interface 9 through signal switching circuit 3.

Referring to Fig. 3.

1 of handle and traffic ear mark interface 9, No. 4 pin is connected with two groups of intermediate contacts of change over switch S2, two groups of normally-closed contacts of S2 are connected with two groups of normally opened contacts of change over switch S1, two groups of normally opened contacts of S2 are connected with two groups of normally-closed contacts of S1, two groups of intermediate contacts of S1 are connected with call voice coupling circuit 2 and two groups of normally-closed contacts being connected to the relay K 2 of signal switching circuit 3 are connected, two groups of intermediate contacts of the relay K 2 of signal switching circuit 3 are connected with the Telephone set port one, 1 of two groups of intermediate contacts of the relay K 2 of signal switching circuit 3 and audio power amplifying circuit 8, No. 3 pin is connected.

Power circuit 4 adopts the double copies power-supplying circuit, form by battery BAT+, direct-current switch power supply VDD, relay K 1 by power circuit 1 during concrete enforcement, battery BAT+ is connected with relay K 1 normally-closed contact, and direct-current switch power supply VDD is connected with relay K 1 normally opened contact; The lead that connects voice coupling circuit 4 and Telephone set interface 2 is provided with two signal switch S1, S2, signal transfer relay K2; The normally-closed contact of a signal switch S1 is connected with the receiver holding wire of Telephone set interface 2, its normally opened contact is connected with transmitter holding wire MI+, the MI-of Telephone set interface 2, intermediate contact is connected with voice coupling circuit 4, the normally-closed contact of another signal switch S2 is connected with transmitter holding wire MI+, the MI-of Telephone set interface 2, its normally opened contact is connected with the receiver holding wire of Telephone set interface 2, and intermediate contact is connected with telephone handle interface 7; Relay K 2 is the binary channels relay, two groups of intermediate contacts of relay K 2 are connected with the receiver holding wire of telephone handle interface 7, two groups of normally-closed contacts are connected with voice coupling circuit 4, and normally opened contact links to each other with

output

1,3 pin (SPK+, SPK-) of power amplification circuit 6.Power circuit 4 provides working power for each element circuit.During work, ordinary priority adopts the direct-current switch power supply power supply, so that save user's use cost, battery and direct-current switch power supply if meet mains failure or Switching Power Supply damage, just transfer powered battery by two-way relay K 1 realization conversion automatically to automatically.Realize the power supply of power supply double copies, make this equipment more reliable and more stable.

Wireless audio signal receives and the output of fm radio circuit 5 is electrically connected with function selector circuit 7 inputs, wireless audio signal receive and fm radio circuit 5 main employing hearing aid earphone lines as the antennas of receiver, the signal of being sensed by the hearing aid earphone line enters the mixting circuit of chip IC 1 inside through integrated circuit 11 pin.The input resonant tank of chip IC 1 is made of C11, C13, C14 and L1, and input signal and local oscillation circuit mixing produce the intermediate-freuqncy signal of 70kHz.Local oscillator is made up of L2 and D1, and C6 is a noise elimination electric capacity, and C5 is external loop filtering electric capacity, C15 is the intermediate frequency feedback capacity, and C21 is a low pass electric capacity, and C17 is the low pass electric capacity of intermediate frequency limiting amplifier, C1, C2 are the channel selection and the filter capacitor that resets, and C10, C19 are power filtering capacitor.The low coupled signal of the audio frequency of 2 pin of chip IC 1 output is delivered to audio power amplifying circuit 8 by function selector circuit 7 and is amplified and be connected to hearing aid earphone port one 0, plug hearing aid earphone at hearing aid earphone port one 0 and just can promote the hearing aid earphone sounding, the L3 of connection hearing aid earphone, the signal that L4 prevents antenna are provided with by the hearing aid earphone bypass.

Voice pickup circuit 6 mainly is made up of MIC, VT1, VT2 and some resistance capacitances, by the voice in the MIC collection environment, be connected to the input of function selector circuit 7 again by VT2 output, the output of function selector circuit 7 is connected with 6, No. 7 pin of input of audio power amplifying circuit 8 through potentiometer RP1.

For sharpening understanding, the operation principle of present embodiment is once described below again:

The Telephone set port one is connected with telephone set, the Telephone set port one is divided into two-way with the telephone speech signal that receives, one tunnel process signal switching circuit 3 is delivered to handle and traffic ear mark port 9 under the situation of not amplifying, for using under normal people of hearing or the quiet environment; Another road is through call voice coupling circuit 2, and function selector circuit 7 is delivered to handle and traffic ear mark port 9 or hearing aid earphone 10 after audio power amplifying circuit 8 amplifies again, and the hearing normal person uses under barrier person or the noisy environment for listening.

Voice hearing aid: behind the talk sound that voice pickup circuit 6 is gathered in the environment, be sent to audio power amplifying circuit 8, deliver to hearing aid earphone interface 10 after the amplification, for listening barrier person hearing aid to use.

ANTENN AUDIO emission receives: in conjunction with Fig. 4, ANTENN AUDIO radiating circuit 11 earlier with the sound source that receives (for example: the audio signal that television set or other tone playing equipments produced) emit, received and fm radio circuit 5 receptions by wireless audio signal.During connection, the output of sound source device is connected with the input of ANTENN AUDIO radiating circuit 11, and two sound channels were imported simultaneously about audio signal was divided.The ANTENN AUDIO transmitter adopts two joint dry cell power supplies, voltage is 3V, light-emitting diode is a power supply indicator, R117 is a current-limiting resistance, C119, C110 is a power filtering capacitor, earlier the audio output of TV or other tone playing equipments is linked into the input of ANTENN AUDIO reflector, audio signal branch left and right sides two-way is imported simultaneously, through preemphasis circuit and coupling circuit R111, R112, R113, C111, L111, R114, C112 delivers to Q1, the capacitance three-point type high-frequency generator of being made up of triode is carried out the frequency carrier modulation, wherein L3 and C4 are vibration harmonic wave frequency-selective circuit, C115 is a feedback capacity, C113, C116 is a high-frequency bypass capacitor, and L114 is produced on double as transmitting antenna on the circuit board.For guaranteeing that emission reaches certain distance, has also added an antenna, in addition because tranmitting frequency can not be disturbed the tuned radio frequency section of national regulation, so select for use between 86MHz～88MHz.The distance of emission is controlled at about 10 meters, reduces the interference to other communication apparatus, TV and FM broadcasting as far as possible.Amplify and deliver to handle and traffic ear mark interface 9, hearing aid earphone interface 10 by 8 pairs of audio frequency that receive of audio power amplifying circuit.

Using method is as follows:

1, as required, function selector circuit 7 is set in the required function shelves.

2, the voice that receive calls, press mains switch K, the voice signal of phone just is input to call voice coupling circuit 2 from the Telephone set port one and is coupled to function selector circuit 7, be transported to 6, No. 7 pin of the ic chip 2 of audio power amplifying circuit 8 by

function selector circuit

7,1, No. 3 foot meridian capacitor C18, C19 and coil L3, L4 from the ic chip 2 on audio power discharge road 8 outputs to hearing aid earphone interface 10 again, is transported to handle and traffic ear mark interface 9 through relay K 2.

3, speech hearing aid: press mains switch K, by the sound (as talk sound) of MIC reception from environment, power to MIC by VT1, the sound that MIC is received is amplified after C25 is coupled to multi-functional selection circuit 7 by the VT2 prime, be transported to 6, No. 7 pin of the ic chip 2 of audio power amplifying circuit 8 again, 1, No. 3 foot meridian capacitor C18, C19 and coil L3, L4 coupling from the ic chip 2 of audio power amplifying circuit outputs to hearing aid earphone interface 10 again, is transported to handle and traffic ear mark interface 9 through relay K 2.

4, answer FM receiver, television field frame sound source: press mains switch K, wireless audio signal receives and fm radio circuit 5 mainly is made of broadcast receiver special integrated chip IC1 (adopting the TDA7088 integrated circuit of PHILIPS Co.).Its internal circuit comprises oscillator, frequency mixer, Automatic Frequency Control circuit, intermediate frequency amplification, intermediate frequency amplitude limit, low frequency squelch circuit, audio frequency output etc.As long as click search button SCAN during use, just IC1 can search for automatically.After searching a radio station, can be accurately tuning and stop search, want to change platform, as long as click search button again, just from the high-end search of trend frequency, when be tuned to just stop search during most significant end, at this moment need click reset button REST, promptly begin again from frequency lower end search start signal.

Claims

1, an a kind of suitable tin barrier person uses multi-function device, comprise a casing, and Telephone set port (1), handle and the traffic ear mark interface (9), the hearing aid earphone interface (10) that are located at this casing periphery, Telephone set port (1), handle and traffic ear mark interface (9), hearing aid earphone interface (10) is connected with circuit in the casing through lead; Circuit comprises voice pickup circuit (6), call voice coupling circuit (2), power circuit (4), it is characterized in that: also comprise signal switching circuit (3), function selector circuit (7) and audio power amplifying circuit (8) in the circuit; The input of function selector circuit (7) is electrically connected with the output of voice pickup circuit (6), call voice coupling circuit (2) respectively, the output of function selector circuit (7) is electrically connected with the input of audio power amplifying circuit (8), Telephone set port (1) is electrically connected with the input of audio power amplifying circuit (8), call voice coupling circuit (2), signal switching circuit (3) respectively, and power circuit (4) is respectively each element circuit working power is provided; Handle and traffic ear mark interface (9), hearing aid earphone interface (10) are arranged on the output of audio power amplifying circuit (8).

2, a this suitable tin barrier person as claimed in claim 1 uses multi-function device, it is characterized in that: in circuit, also be provided with wireless audio signal reception and fm radio circuit (5), wireless audio signal radiating circuit (11), wireless audio signal receives and the output of fm radio circuit (5) is electrically connected with the input of function selector circuit (7), and wireless audio signal radiating circuit (11) is serially connected on the corresponding sound source circuit.

3, a this suitable tin barrier person as claimed in claim 1 uses multi-function device, it is characterized in that: power circuit (4) is made up of battery (BAT+), direct-current switch power supply (VDD), relay (K1), battery (BAT+) is connected with relay (K1) normally-closed contact, and direct-current switch power supply (VDD) is connected with relay (K1) normally opened contact.