CN2457825Y

CN2457825Y - Hand-free talking amplifier for mobile phone

Info

Publication number: CN2457825Y
Application number: CN01217177U
Authority: CN
Inventors: 吴东辉
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-01-13
Filing date: 2001-01-13
Publication date: 2001-10-31
Anticipated expiration: 2011-01-13

Abstract

The utility model discloses a hand-free communication amplifier for mobile phones. The utility model is characterized in that the utility model has a shell which is provided with a hand-free communication amplifying circuit provided with a signal detection circuit which receives the mobile telephone output signal, the signal detection circuit is connected with an electronic switching circuit which is connected with an audio frequency amplification circuit which transmits the signal to the loudspeaker to output. The utility model has the advantages novel structure, stable performance, flexible and convenient use, and capability of relieving human bodies, particularly human brains from the mobile telephone radiation.

Description

The handfree speech of mobile phone amplifier

The utility model relates to the servicing unit of the communication apparatus, is a kind of servicing unit that is used for mobile phone, specifically, be that a kind of and mobile phone is used, make mobile phone have the device of hand-free call function.

Along with the raising day by day of living standards of the people, modern communication equipment is also more and more universal, has just ranked lance before the world as the absolute owning amount of present China mobile phone.But the radiation that mobile phone produced is known from experience the generation harmful effect to the people, especially can user's brain be caused damage, though present many users adopt earphone to attempt to avoid mobile phone that brain is caused damage, earphone is useful or harmful or the problem of being disputed on earth.In addition, people are when driving a car, and answering cell phone also easily goes wrong.

The purpose of this utility model provide a kind of can with existing mobile phone be used stable and reliable for performance, exempt mobile phone radiation to the injury of human brain, handfree speech of mobile phone amplifier easy to use.

Technical solution of the present utility model is: a kind of handfree speech of mobile phone amplifier, it is characterized in that: a shell is arranged, the handfree speech of mobile phone amplifying circuit is housed in the shell, the signal deteching circuit of accepting the mobile phone output signal is arranged in the handfree speech of mobile phone amplifying circuit, signal deteching circuit is connected with electronic switching circuit, electronic switching circuit is connected with an audio amplifier circuit, and audio amplifier circuit is delivered to loud speaker output with signal.

The connecting line of signal deteching circuit signal deteching circuit described in the utility model for being connected with the handset earphone socket.Or a pick-up of accepting the mobile phone output signal arranged in the signal deteching circuit, and another accepts the high-frequency inductor of mobile phone high-frequency signal, pick-up is connected with audio amplifier circuit, and high-frequency inductor is connected with electronic switch, and foregoing circuit also is connected with power circuit.Pick-up and high-frequency inductor are positioned in the clamper that can be clamped on the mobile phone or on it, and are connected with other circuit of handfree speech of mobile phone amplifying circuit in being loaded on another housing by lead.Pick-up can replace with the induction coil on the iron core.Audio amplifier circuit is connected with receiver circuit.Also can be connected to rechargeable battery in the handfree speech of mobile phone amplifying circuit, rechargeable battery is connected with a solar charging circuit.Rechargeable battery can adopt compact lithium cell.Certainly, also can adopt other suitable specific constructive form.

The utility model has the advantages that: the novel structure uniqueness, stable and reliable for performance, can exempt mobile phone radiation to human body especially to the injury of human brain, flexible and convenient to use, when driving, use mobile phone that convenience is provided in particular for the automobile driver.And can with the supporting use of existing commercially available mobile phone.

Below in conjunction with drawings and Examples the utility model is further described:

Fig. 1 is the functional-block diagram of the handfree speech of mobile phone amplifying circuit that adopted in a kind of handfree speech of mobile phone amplifier of the present utility model;

Fig. 2 is the functional-block diagram of the handfree speech of mobile phone amplifying circuit that adopted in the another kind of handfree speech of mobile phone amplifier of the present utility model;

Fig. 3 is the circuit diagram corresponding with Fig. 1 block diagram;

Fig. 4 is the circuit diagram corresponding with Fig. 2 block diagram;

Fig. 5 is the structural representation of clamper.

Fig. 1, Fig. 3 have described an embodiment of the present utility model.And Fig. 2, Fig. 4 have described another embodiment.The utility model is made up of the electronic switch of audio frequency amplifier and unlatching audio frequency amplifier, the signal of unlocking electronic switch divides two kinds, a kind of is directly to utilize the audio signal of exporting on the handset earphone socket, and another kind is the switching signal unlocking electronic switch with high-frequency inductor output.This installs power consumption hardly at ordinary times, so adopt powered battery.Operation principle: first embodiment directly utilizes handset earphone output signal voice emplifying, CK is the handset earphone socket, link to each other with amplifier T2 by lead, T1 is an electronic switch, obtain as T1 after the audio signal of handset earphone output the T1 conducting, T2 gets the work of electric back, and T2 can not get during no signal at ordinary times, thereby do not work therefore not power consumption at ordinary times.Second embodiment utilizes the switching signal of high-frequency inductor output signal as T1, and after mobile phone was posted a letter or received bell signal, high-frequency inductor S exported a switching signal and gives T1, makes the T1 conducting, and T2 gets electric work.

Fig. 5 provides a kind of pick-up MIC and high-frequency inductor S has been clipped in clamper on the mobile phone, 1 is cell-phone receiver, 3 for being held mobile phone, 4 is output lead, certainly can also utilize the mobile phone that mobile phone can be fixed in the automobile to hold platform, mobile phone is held platform can utilize two-sided sandwich rubber, mobile phone is held platform be fixed in the automobile.

Below second embodiment of the present utility model carried out more detailed explanation: form by inductor S and pick-up with by the amplifier two large divisions that CM386 forms, middle continuous with four leads, inductor S and pick-up MIC are contained in the clamper shown in Figure 3, the amplifier of forming by LM386 and be contained in the etui by the electronic switch that T1 forms, battery-powered.

High-frequency inductor: this high-frequency inductor independently exists, static power consumptive province, as long as it is placed in the mobile phone nominal distance, when cell phone incoming call, high-frequency inductor just can be exported the start high level.The circuit working principle of high-frequency inductor: when static state WT272 the 5. the incoming level of pin be lower than 6. pin, 7. pin output low level, T1 was not worked by the amplifier that LM386 forms by (forming electronic switch by T1).When cell phone incoming call, antenna L1 and capacitor C 1 by high-frequency inductor receive transmitting of mobile phone come in, D1M2X partly inputs to the positive pulse of induced signal the 5. pin of WT272, negative pulse partly inputs to the 6. pin of WT272, make the 7. pin output high level of WT272, the T1 conducting, by the amplifier operate as normal that LM386 forms, potentiometer W is used for regulating volume.But CK2 lug machine is the mobile phone increase ear-phone function of no earphone function.

Element is selected, explanation: WT272 selects SMD miniature integrated package for use, elements such as all resistance, electric capacity, diode all can be selected chip for use in the circuit, to reach the purpose of dwindling small product size, L1, C1 should be tuned at the communication frequency of mobile phone, to guarantee the receiving sensitivity of high-frequency inductor.

The also available induction coil on iron core of pick-up MIC replaces, and its principle is to utilize the audio frequency magnetic field of the leakage of cell-phone receiver earphone to extract audio signal, and its advantage is no environment noise, and shortcoming is the amount of leakage difference of various mobile phones, regulates trouble.Electronic switch T1 also can select ready-made integrated circuit modules for use; Amplifier T2 also can select 2076 or other suitable integrated circuit blocks for use except that LM386.WT272 in the high-frequency inductor also can select other suitable integrated packages for use.

Also comprise components and parts such as resistance R 1, R2, R3, R4, R5, R6, R11, R12, R13, capacitor C 1, C2, C3, C4, C5, C6, C7, C8, C9, C10, C11, C12, C13, C14, C15, C16, C17, C18, C19, C20, C21, C22, potentiometer W among Fig. 3, Fig. 4.SPEK is a loud speaker, and CK1, CK2 are sockets.

Other embodiments:

1, MIC, inductor, amplifier all are contained in the capsule, the device that can clamp mobile phone is arranged on capsule, or inductor, amplifier are contained in the capsule, MIC is contained on the clip that is connected in capsule, thereby makes mobile phone and amplifier integrated.

2, utilize amplifier, with the broadcast receiver design together, play the function of a tractor serves several purposes.

3, can be connected to rechargeable battery in the handfree speech of mobile phone amplifying circuit, rechargeable battery is connected with a solar charging circuit.Rechargeable battery can adopt compact lithium cell.

Claims

1, a kind of handfree speech of mobile phone amplifier, it is characterized in that: a shell is arranged, the handfree speech of mobile phone amplifying circuit is housed in the shell, the signal deteching circuit of accepting the mobile phone output signal is arranged in the handfree speech of mobile phone amplifying circuit, signal deteching circuit is connected with electronic switching circuit, electronic switching circuit is connected with an audio amplifier circuit, and audio amplifier circuit is delivered to loud speaker output with signal.

2, handfree speech of mobile phone amplifier according to claim 1 is characterized in that: the connecting line of signal deteching circuit for being connected with the handset earphone socket.

3, handfree speech of mobile phone amplifier according to claim 1, it is characterized in that: a pick-up of accepting the mobile phone output signal is arranged in the signal deteching circuit, and another accepts the high-frequency inductor of mobile phone high-frequency signal, pick-up is connected with audio amplifier circuit, high-frequency inductor is connected with electronic switch, and foregoing circuit also is connected with power circuit.

4, handfree speech of mobile phone amplifier according to claim 3, it is characterized in that: pick-up and high-frequency inductor are positioned in the clamper that can be clamped on the mobile phone or on it, and are connected with other circuit of handfree speech of mobile phone amplifying circuit in being loaded on another housing by lead.

5, according to claim 3 or 4 described handfree speech of mobile phone amplifiers, it is characterized in that: pick-up replaces with the induction coil on the iron core.

6, according to claim 1 or 2,3,4 described handfree speech of mobile phone amplifiers, it is characterized in that: audio amplifier circuit is connected with receiver circuit.

7, according to claim 1 or 2,3,4 described handfree speech of mobile phone amplifiers, it is characterized in that: be connected to rechargeable battery in the handfree speech of mobile phone amplifying circuit, rechargeable battery is connected with a solar charging circuit.

8, handfree speech of mobile phone amplifier according to claim 7 is characterized in that: rechargeable battery adopts compact lithium cell.