CN2085125U

CN2085125U - Microphone

Info

Publication number: CN2085125U
Application number: CN 91200743
Authority: CN
Inventors: 江坤田
Original assignee: Individual
Current assignee: Individual
Priority date: 1991-01-21
Filing date: 1991-01-21
Publication date: 1991-09-18

Abstract

The utility model relates to a microphone which comprises a magnet, a rubber ring embedded in the magnet, a yoke for fixing the rubber ring, a pad arranged between the magnet and the bottom of the yoke, a body which can embed and fix the yoke, a shock coil film covered and sealed on the top of a containing chamber of the body, and a fixed cover sheathed and sealed on the top of the containing chamber of the body. The utility model is characterized in that the outer edge of the rubber ring is provided with an annular groove. A plurality of channels communicated with a top magnetic field chamber and the bottom part are arranged on the annular groove. An inner silencing body with minute holes is coated on the channels to reduce the jamming sound waves feeding back to the shock coil film. The utility model is a microphone which can effectively reduce noise.

Description

Microphone

The utility model relates to a kind of improvement of Microphone structure, is meant that especially a kind of back coupling sound of can effectively subduing disturbs the noise that produces to reduce it, thereby increases the Microphone of sound clarity degree.

As shown in Figure 1, this figure is a kind of assembled sectional view of Microphone of existing traditional usefulness; Mainly include: a magnet A, a fixing glue ring B, a yoke C, a pad D, a body E, a vibrations coil film F and fixed cap G etc.; Wherein, magnet A is in order to set up a predetermined magnetic field; This fixing glue ring B then establishes wherein for above-mentioned magnet A build-in bag; And this yoke C roughly is a ring body shape, and can be embedded in it for aforementioned fixation glue ring B, then inwardly form a ring flange C1 at its top, can be used as the magnetic conductance road of the magnet A magnetic line of force, and in the cavity C 2 of top flange C1 and magnet A top periphery, produce and concentrate effective magnetic flux; This pad D pad is located in the bottom of above-mentioned magnet A bottom and yoke C; And body E is the cylindrical shell that central authorities connect, and its top offers a room E1, can be embedded wherein for above-mentioned yoke C; Vibrations coil film F, envelope is located on the room E1 opening of above-mentioned body E, and the corresponding trip of induction coil F1 is located in the aforementioned cavity C 2 with magnetic field; Fixed cap G then is fixed in the room E1 top of above-mentioned body E, and the periphery of above-mentioned vibrations coil film F can be pressed solidly the location, between itself and this vibrations coil film F and form one and receive the G1 of tone chamber, its capping then is laid with a plurality of through hole G2, imports this into for source of sound and receives in the G1 of tone chamber.

The effect of this kind Microphone is: when sound wave is imported into when receiving the G1 of tone chamber by the through hole G2 of fixed cap G, can make vibrations coil film F action, like this, induction coil F1 on it will do predetermined vibrations thereupon, and cutting builds on the magnetic line of force in the cavity C 2, thereby induction obtains and the corresponding current signal of this sound wave.

The structure design of above-mentioned existing Microphone, no doubt quite exquisite, and can obtain quite practical effect, and continue to use for a long time for all circles, (also have in the gluing mode magnet A is fixing) still, under use experience for many years, can find still to have shortcoming, mainly be: this vibrations coil film F below and body E, yoke C, room E1 between fixing glue ring B and magnet A, be room substantially for a sealing, therefore when this vibrations coil film F is promoted by sound wave, can evoke sound wave too among this room E1, can not disappear and let out, or disappear and let out not as good as (or bad) because these sound waves have passage, and in room E1, come repercussion to form the back coupling noise, make the tone chamber that receives of this vibrations coil F produce harmonic wave, so that the signal that this coil F1 is induced contains the multiple harmonic signal, feedback sound and the unsharp shortcoming of tonequality and can produce.

Main purpose of the present utility model is that a kind of humorous back coupling sound of subduing in the glue ring cavity that involves is being provided, thereby reduces the Microphone that produces assorted signal because of the interference of back coupling sound.

The Microphone that the utility model proposes mainly comprises:

One can provide the magnet in a predetermined magnetic field;

One can supply above-mentioned magnet build-in glue ring wherein;

One yoke can be embedded wherein for above-mentioned glue ring, can be used as the magnetic conductance road of the aforementioned magnet institute magnetisation line of force, make it in its top and magnet top week the intermarginal magnetic field chamber of setting up;

One pad, pad are located in above-mentioned magnet bottom and the yoke bottom, can be used as the magnetic conductance road of the magnetic line of force;

One body, this bodies top is provided with a room, can be for above-mentioned yoke build-in in it;

One vibrations coil film can be made up of with the induction coil of these diaphragm vibrations a diaphragm and, and its cap seal is located in the aforementioned magnetic field chamber and this induction coil correspondence is swum at aforementioned body room top;

One fixed cap, this fixed cap are fixed in the above-mentioned bodies top room, and and the intermembranous formation one of above-mentioned vibrations coil receive the tone chamber, its capping is laid with a plurality of through holes, imports this into for source of sound to receive the tone chamber;

Be primarily characterized in that: offer a ring groove on the outer ring edge of aforementioned glue ring, be laid with the sound-delivery channel of a plurality of connections top magnetic field chamber and bottom on it, and on the passage of this groove, all coating interior sound-absorptive object with minute aperture tissue;

Because the combination of above-mentioned member, the sound wave that is evoked in the chamber of this vibrations coil film bottom can be passed by the passage on this glue ring and let out, and suitably subdue for interior sound-absorptive object, and the sound wave of feedbacking in the vibrations coil film effectively can be reduced, to reduce the phenomenon that produces the assorted signal of harmonic wave back coupling.

For reaching above-mentioned purpose, the technological means that adopts and effect thereof, lift a preferable possible embodiments and conjunction with figs. now and be described as follows:

Shown in Figure 1 is a kind of combination cross-sectional schematic of existing Microphone;

Shown in Figure 2 is that perspective exploded view is looked in the part of the utility model embodiment;

Shown in Figure 3 is the combination cross-sectional schematic of the utility model embodiment;

See also shown in Fig. 2,3; Present embodiment consists predominantly of a magnet 1, a glue ring 2, one interior sound-absorptive object 3, a yoke 4, a pad 5, a body 6, vibrations coil film 7, a fixed cap 8 and an outer sound-absorptive object 9; Wherein,

Magnet 1 is in order to a predetermined magnetic field to be provided.

Glue ring 2 forms a ring bodies substantially, provided a cover chamber 21 on it, can be wherein for above-mentioned magnet 1 build-in, on its outer ring edge and offer a ring groove 22, then be laid with the through hole 23 of a plurality of connection internal sleeve chamber 21 on this ring groove 22, and the perisporium that prolongs cover chamber 21 on the interior edge of this through hole 23 offers groove 24 to the bottom, extended passage 25 along periphery wall to the top on groove 22 tops.

Interior sound-absorptive object 3 can be made (as gauze, gauze, foamed plastics, adhesive-bonded fabric etc.) by the sheeting with minute aperture tissue, be coated on the groove 22 of above-mentioned glue ring 2, can subdue the harmonic wave of each through hole 23 on this groove 22 of transmission from one channel to another.

Yoke 4, this yoke 4 also is a ring body shape haply, offer an embedding chamber 41 on it, can be embedded at wherein for above-mentioned glue ring 2, one ring flange 42 is inwardly formed on its top, can be used as the magnetic conductance road of the magnetic line of force that aforementioned magnet 1 produced, and in top flange 42 and magnet 1 top week intermarginal chamber 43, set up and concentrate effective magnetic flux.

Pad 5, this pad 5 pads are located in 41 bottoms, embedding chamber of above-mentioned magnet 1 bottom and yoke 4, and its periphery and offer the breach 51 of aforementioned glue ring 2 grooves 24 of a plurality of correspondences.

Body 6 is to be a cylindrical shell, center of top is provided with a room 61, can be in it for above-mentioned yoke 4 build-ins, its bottom then is communicated with room 61 and has provided a passage 62, and in this room 61 perisporiums top, bottom respectively Boulez offer radially a concave ring groove 63 and an a plurality of axial pass trough 64 that is connected, and have the through hole 631,641 that connects outer peripheral edges on this concave ring groove 63 and the groove 64 respectively, and, form the ring seat 65 of a larger aperture in the top of this groove 63.

Vibrations coil film 7 mainly be set firmly one in a diaphragm 71 bottoms can be with the induction coil 72 of its vibrations, and cap seal is on the ring seat 65 at aforementioned body 6 tops, and these induction coil 72 corresponding trips are located in the aforementioned chamber 43 that has magnetic field.

The bottom periphery of fixed cap 8 has protruded out a ring and has compressed line 81, is fixed in the above-mentioned body 6 top ring seats 65 with its cover, and can will presses solidly the location with the periphery of being located at the vibrations coil film 7 on the ring seat 65; Also form one between itself and this vibrations coil film 7 and receive tone chamber 82, its capping then is laid with a plurality of through holes 83 equally, imports into for source of sound and receives in the tone chamber 82.

Outer sound-absorptive object 9 is made by the thin slice with minute aperture tissue equally, is coated on body 6 outer peripheral edges on the above-mentioned through hole 631,641 with it, can subdue the sound wave of this through hole 631,641 of transmission from one channel to another.

The action principle of present embodiment and existing Microphone are as good as, promptly, when sound wave is imported into when receiving tone chamber 82 by the through hole 83 of fixed cap 8, can cause shaking coil film 7 actions, induction coil 72 on it promptly shakes thereupon, and cutting is built in the magnetic line of force in the chamber 43, and induction obtains and the corresponding current signal of this sound wave; So the structure because of present embodiment designs, be to improve the assorted signal of the harmonic wave that absorbs in glue ring 2 chambeies, on glue ring 2, offer and be communicated with vibrations coil film 7 bottom rooms 75 and outside through hole, groove etc., and on the through hole 23 of this glue ring 2, sound-absorptive object 3 in covering, therefore the sound wave that is evoked by vibrations coil 7 in this room 75 can be passed by this passage and let out, and suitably subdued by this sound-absorptive object 3, will effectively reduce in the harmonic wave of vibrations coil film 7 so feedback in the room 75, some are produced assorted signal by the interference of back coupling sound phenomenon can effectively improve.Microphone provided by the utility model can reach the purpose of subduing the back coupling sound really.

Claims

1, a kind of Microphone mainly comprises:

-in order to the magnet in a predetermined magnetic field to be provided;

-can supply the nested glue ring that sets firmly wherein of above-mentioned magnet;

-yoke provides an embedding chamber on it, a ring flange is inwardly formed on the top;

-pad, pad are located at the bottom, embedding chamber of above-mentioned magnet bottom and yoke;

-body has provided a room on it, can be for above-mentioned yoke build-in wherein;

-vibrations coil film, this vibrations coil film is to set firmly one can constitute with the induction coil of its vibrations in the bottom of a diaphragm, cap seal is in aforementioned body room top;

-fixed cap, cover is enclosed on the above-mentioned body room top, and and the intermembranous formation one of aforementioned vibrations coil receive the tone chamber, its capping also is laid with a plurality of connections this receives the through hole of tone chamber;

It is characterized in that: offer a ring groove on the outer ring edge of this glue ring, be laid with the passage of a plurality of connections top magnetic field chamber and bottom on it, and on the passage of this groove, coating interior sound-absorptive object with minute aperture composition.