CN2142625Y

CN2142625Y - Inserted electrodynamic type hearing aid earphone

Info

Publication number: CN2142625Y
Application number: CN 92220847
Authority: CN
Inventors: 丁永生
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-09-26
Filing date: 1992-09-26
Publication date: 1993-09-22
Anticipated expiration: 2002-09-26

Abstract

The utility model relates to an electrodynamic insertion type earphone for hearing aids, which overcomes the defects of the prior art. The utility model is mainly composed of an earplug cover, a front cove, a diaphragm, a magnetism-conducting plate, a voice coil, a magnetism conducting core, a centering disk, a magnet, a magnetism conducting bowl, a back cover, a wiring piece, etc. The utility model has the advantages of simple structure, simple manufacture technology, small size, high sensitivity, stable operation, good frequency response, low cost, easy operation, etc.

Description

Inserted electrodynamic type hearing aid earphone

The utility model relates to a kind of hearing aid earphone, the electronic insert earphone of particularly a kind of hearing aids.

At present, known hearing aids electromagnetism insert earphone, existing shortcoming is as follows: problems such as its complex structure, fearness vibration, unstable properties and distortion are bigger.

The purpose of this utility model: to separate the problem of above-mentioned existence in order being situated between, and to provide a kind of hearing aids electronic insert earphone, it have simple for structure, volume is little, highly sensitive, characteristics such as impedance is high, working stability is reliable and frequency response is good.

In order to realize this purpose, invention scheme of the present utility model is: in Figure of description, Fig. 1 provides the structural representation of this electronic insert earphone, and it mainly is made up of earplug cover (1), front shroud (2), diaphragm (3), magnetic conductive board (4), voice coil loudspeaker voice coil (5), magnetic conduction core (6), centering disk (7), magnet (8), magnetic conductor bowl (9), back cover (10), lead-in wire (11) and lug plate parts such as (12).Fig. 2 provides magnetic circuit component groups assembling structure schematic diagram among Fig. 1, and Fig. 3 provides Fig. 1 middle pitch membrane module package assembly schematic diagram, and Fig. 4 provides the main performance correlation curve figure of this electronic insert earphone and existing electromagnetism insert earphone.About concrete feature and the embodiment of Fig. 1, Fig. 2 and Fig. 3, in the Figure of description explanation, described.

Advantage of the present utility model:

This electronic insert earphone is to assemble magnetic circuit assembly and sound membrane module earlier according to Fig. 2 and Fig. 3 respectively, carry out general assembly according to Fig. 1 then, it is simple for structure, by the magnetic structure that magnetic conductive board (4), magnetic conduction core (6), magnet (8) and magnetic conductor bowl (9) are formed, constitute high magnetic flux density with reduced volume.Diaphragm (3) is with metallic aluminium or mylar hot pressing and moulding, and its planform is an arc, and its material therefor and shape make it can reach certain frequency response requirement.Voice coil loudspeaker voice coil (5) is that to adopt diameter be that the enamelled wire of 0.03mm is made, and making high impedance is the voice coil loudspeaker voice coil of the dc resistance of 90～100 Ω, can reach coupling preferably with hearing aids.Cooperating with slit between the diaphragm (3) at front shroud (2) is between 0.2～0.3mm, makes ante-chamber become discharge chambe, thereby has improved the sensitivity of this electronic insert earphone.Its main performance index after tested: impedance is in 130～160 Ω scopes, D.C. resistance is in 90～100 Ω scopes, harmonic distortion≤3%, frequency response and sensitivity are seen the main performance correlation curve figure of this electrodynamic type insert earphone and existing electromagnetism insert earphone among Fig. 4.Therefore, it have simple for structure, manufacture craft is simple, volume is little, highly sensitive, impedance is high, working stability is reliable, frequency response is good, cost is low and characteristics such as easy to implement.

Below in conjunction with Figure of description concrete feature of the present utility model and embodiment are further described:

Fig. 1 provides the structural representation of this insert earphone, and it mainly is made up of earplug (1), front shroud (2), diaphragm (3), magnetic conductive board (4), voice coil loudspeaker voice coil (5), magnetic conduction core (6), centering disk (7), magnet (8), magnetic conductor bowl (9), back cover (10), lead-in wire (11) and lug plate parts such as (12).Wherein: front shroud (2), back cover (10) and centering disk (7) all adopt metallic aluminum material to process through turning, and oxide treatments is carried out on the surface then, and oxidation processes is only carried out on its centering disk (7) surface.Magnetic conductive board (4), magnetic conduction core (6) and magnetic conductor bowl (9) all adopt the electrical pure iron material, process through turning, and the surface is all zinc-plated then.Earplug cover (1), magnet (8) and lead-in wire (11) are outsourcing piece, commercialization.Lug plate (12) is to be that the printed board of 0.2mm is made by thickness.Fig. 2 provides magnetic circuit component groups assembling structure schematic diagram among Fig. 1, when carrying out this magnetic circuit assembly assembling, at first other part purifies with alcohol wash with each, the magnet that does not magnetize (8) is put into magnetic conductor bowl (9), and be adhesively fixed with 502 at contact-making surface, use centering disk (7) magnetic conduction core (6) to be installed in the center then, and be adhesively fixed with 502 at contact-making surface by Fig. 2.Again magnetic conductive board (4) is covered on magnetic conductor bowl (9), and be adhesively fixed with 502 at contact-making surface.At last at magnetic conductor bowl (9) center with the 502 gluing lug plates of going up, so promptly be assembled into the magnetic circuit assembly, as shown in Figure 2.Fig. 3 provides Fig. 1 middle pitch membrane module package assembly schematic diagram, when carrying out this sound membrane module assembling, earlier voice coil loudspeaker voice coil (5) is adhesively fixed at the center of diaphragm (3) with 502, to keep the perpendicularity of voice coil loudspeaker voice coil (5) when bonding and be positioned at the center of diaphragm (3), available for this reason frock clamp comes positioning bonding, so promptly assemble the audio membrane module, as shown in Figure 3, be this electronic insert earphone general assembly at last, earlier the sound membrane module of Fig. 3 is fit in the magnetic circuit assembly of Fig. 2, with 703 gluing connecing, two lead-in wires (11) cause lug plate (12) along magnetic conductor bowl (9) outer wall and locate to weld between the edge of diaphragm (3) and magnetic conductive board (4).Usefulness is equipped with on front shroud (2) cover of earplug cover (1) in the front portion of diaphragm (3), pours into sealing with 703 glue in its slit, edge.To go between (11) pass the fairlead of back cover (10), be welded to then on the lug plate (12), at last (10) cover to the rear portion of this electronic insert earphone, in its slit, edge with 703 glue sealing, be that general assembly is made into this electronic insert earphone like this, as shown in Figure 1.

Promptly constitute the utility model according to above-mentioned making---the electronic insert earphone of hearing aids.

Claims

1, the electronic insert earphone of a kind of hearing aids, it mainly is made up of earplug cover (1), front shroud (2), diaphragm (3), magnetic conductive board (4), voice coil loudspeaker voice coil (5), magnetic conduction core (6), centering disk (7), magnet (8), magnetic conductor bowl (9), back cover (10), lug plate (12) and lead-in wire (11) part, it is characterized in that the magnetic structure of being made up of magnetic conductive board (4), magnetic conduction core (6), magnet (8) and magnetic conductor bowl (9) constitutes high magnetic flux density with reduced volume.

2, electronic insert earphone according to claim 1, the planform that it is characterized in that diaphragm (3) is an arc, be to adopt metal aluminium or mylar hot pressing and moulding, and in the front portion of diaphragm (3) with being equipped with on front shroud (2) cover of earplug cover (1), pour into sealing in its slit, edge with 703 glue.

3,, it is characterized in that it is between 0.2～0.3mm that front shroud (2) cooperates with slit between the diaphragm (3) according to claim 1,2 described electronic insert earphones.

4, electronic insert earphone according to claim 1 is characterized in that voice coil loudspeaker voice coil (5) is that to adopt diameter be that the enamelled wire of 0.03mm is made, and can mate with hearing aids.