CN2253896Y

CN2253896Y - Earphone type talking device

Info

Publication number: CN2253896Y
Application number: CN 96202388
Authority: CN
Inventors: 何景芳; 刘春良; 张纯
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-01-31
Filing date: 1996-01-31
Publication date: 1997-05-07
Anticipated expiration: 2006-01-31

Abstract

The utility model relates to an earplug type talking device for radio communication, which has the structure that a sound pipe conducting wire with a shield is connected with a field effect triode in an outer shell by a sheath; the field effect triode is welded and fixed on a wire fixing plate; a piezoelectrics is fixed in the center of an inner shell by a fixing plate; the inner shell is fixed at the upper part of a cylinder of an inner earplug of the outer shell; a shielding layer of the sound pipe conducting wire is connected with a source pole of the field effect triode and one end of the piezoelectrics, the other end of which is connected with a gate pole of the field effect triode; a drain pole of the field effect triode us connected with a core wire of the sound pipe conducting wire. The utility model has the advantages of simple structure, convenient operation and strong anti-interference ability, and can improve the speech quality.

Description

The ear type communication

The utility model relates to the ear type communication that a kind of radio communication is used.

The wireless telecommunications system that departments such as public security at present, railway use mostly adopts the conductance mode to converse, necessary hand-held radio telephone or transmitter in conversation, both hands had both been taken, unfavorable again maintaining secrecy, and it is affected by environment big, as in noisy market or by the railway, be difficult to the communication effect that reaches desirable.

The purpose of this utility model just provides a kind of novel ear type communication.

The purpose of this utility model is achieved like this, utilize the structure of insert earphone shell, portion dress piezoelectrics and fet within it, and with the same external communications of sound pipe lead, piezoelectrics and fet are packed on the terminal block, and are fixed by fixed head.

The utility model is simple in structure, and shield effectiveness is good, and antijamming capability is strong, and is easy to use, is big the improvement and innovation to existing communicator.

Describe structure of the present utility model in detail below in conjunction with accompanying drawing.

Fig. 1 is structure chart of the present utility model (partly cut-away).

Fig. 2 is electric key wiring diagram.

By shown in Figure 1, its structure of the utility model is, the sound pipe lead 6 of band shielding joins with the fet 2 in the shell body 1 by rubber sheath 7, fet 2 is weldingly fixed on the terminal block 3, piezoelectrics 5 are fixed on inner housing 4 centers by fixed head 9, inner housing 4 is fixed on earplug cylinder top in the shell body 1 by fixed head 9, the screen of sound pipe lead 6 connects the source plate S of fet and an end of piezoelectrics, the grid G of another termination fet of piezoelectrics, the drain D of fet connects the heart yearn (seeing shown in Figure 2) of sound pipe lead 6, shell is the earplug shape, shell earplug cylinder end has outlet, is used to draw shake signal and send and listen to sound of otica.Sturdy and durable for it, interior sound pipe lead of shell and inner housing are buckled 8 by solidus and are fixed tightly in together.After inner first portion installs, use the epoxide-resin glue sealing in the housing on fixed head 9 tops.

By above-mentioned situation as can be known, the utility model is a kind of contact anti-noise device, its work is to pick up bone conduction (because of the language vibrates) mechanical oscillation signal that is transmitted by head, convert the signal of telecommunication again to, its inverting element adopts double piezoelectrics, and the version that its one-tenth is parallel with duct, utilize its piezoelectric energy-conversion effect, convert the vibration signal of its external auditory meatus to the signal of telecommunication, send after amplifying via fet, during use, since be to insert in the external auditory meatus, thus very insensitive to external air borne sound sound, so have good anti-noise effect, can improve speech quality greatly, it is applied must be popular with users.

Claims

1, a kind of shell body is the ear type communication of earplug shape, it is characterized in that joining by the fet (2) in the same shell body of rubber sheath (7) (1) with the sound pipe lead (6) of shielding, fet (2) is weldingly fixed on the terminal block (3), piezoelectrics (5) are fixed on inner housing (4) center by fixed head (9), inner housing (4) is fixed on the interior earplug cylinder of shell body (1) top by fixed head (9), the screen of sound pipe lead (6) connects the source S of fet and an end of piezoelectrics, the grid G of another termination fet of piezoelectrics, the drain D of fet connects the heart yearn of sound pipe lead (6).

2, ear type communication according to claim 1 is characterized in that sound pipe lead and inner housing are buckled (8) by solidus in the shell to be fixed tightly in together, uses the epoxide-resin glue sealing in the housing on fixed head (9) top.