CN201409219Y

CN201409219Y - Electroacoustic sounding device

Info

Publication number: CN201409219Y
Application number: CN2009201303631U
Authority: CN
Inventors: 贺晶
Original assignee: AAC Acoustic Technologies Shenzhen Co Ltd; AAC Acoustic Technologies Changzhou Co Ltd
Current assignee: AAC Technologies Holdings Shenzhen Co Ltd; AAC Technologies Holdings Changzhou Co Ltd
Priority date: 2009-04-03
Filing date: 2009-04-03
Publication date: 2010-02-17
Anticipated expiration: 2019-04-03

Abstract

The utility model discloses an electroacoustic sounding device, in particular to an electroacoustic sounding device improved on the basis of a magnetic circuit system structure. A T-shaped magnet frame with a magnetic column is connected to the interior of a speaker frame on which a ring-shaped accommodating hole is formed, a magnet provided with a magnetic hole in contact with the inner wall of the speaker frame is loaded on the T-shaped magnet frame, the magnetic hole is sleeved on the magnetic column to form a magnetic clearance, and part of a voice coil is suspended in the magnetic clearance. Therefore, the size of the magnetic steel is expanded to the utmost, magnetic flux with high density can be obtained, the sensitivity of the voice coil is enhanced, the phenomenon of transient distortion is avoided, and the utility model is helpful to the reliability of the sound quality of a sounder.

Description

Electroacoustic can microphone device

[technical field]

The utility model relates to a kind of electroacoustic energy acoustical generator field, refers to that specifically a kind of electroacoustic of magnetic circuit system architecture advances can microphone device.

[background technology]

Development along with wireless telecommunications, Global Mobile Phone Users is more and more, the user not only is satisfied with conversation to the requirement of mobile phone, and want high-quality communication effect can be provided, especially at present the development of mobile multimedia technology, the speech quality of mobile phone becomes more important, and the microphone of mobile phone is as the voice pick device of mobile phone, and its design quality directly influences speech quality.

At present, the mini-sound device of dependency structure comprises the loam cake that has the basin frame of accommodating cavity, joins with the basin frame and be provided with hole, and basin frame and loam cake form a cavity volume.Be provided with the magnetic circuit system, the magnetic circuit system that are contained in the basin frame in this cavity volume and be provided with the voice coil loudspeaker voice coil that is connected with vibrating diaphragm, voice coil loudspeaker voice coil is suspended in the magnetic gap of described magnetic circuit system; Magnetic circuit system comprises that the magnet steel of magnetic bowl, the sheet of peviform forms, and the bottom of basin frame is provided with the circuit board that realization links to each other with external circuit, the passing the hole that the basin frame is provided with into and out of line and link to each other with circuit board of voice coil loudspeaker voice coil.When feeding the alternation tone currents on circuit board, voice coil loudspeaker voice coil is subjected to the motive force of alternation in magnetic gap, produces alternate motion, thereby drives the vibrating diaphragm vibration, sounds.

Load the sheet magnet steel in the magnetic bowl of the peviform structure of this structure mini microphone device, because the planform of magnetic bowl self, its flux density value is smaller, then the value of voice coil loudspeaker voice coil cutting magnetic line is little, causes poor sensitivity, that is to say, magnetic flux density is the loudspeaker sensitivity height greatly then, otherwise then little.The size of speaker sound just, transient state are exactly speaker system with not getting caught up in the reaction speed of music rhythm in brief, otherwise will produce transient distortion.Have a strong impact on the definition of sound, cause product reliability low, thereby be necessary to study a kind of electroacoustic energy microphone device with new construction.

[utility model content]

The utility model is little at the flux density value of magnetic circuit system in the acoustical generator, and causes acoustical generator sensitivity low, easily produces the problem of transient distortion, and the structure improved electroacoustic energy of a kind of magnetic circuit system microphone device is provided.

Electroacoustic energy microphone device of the present utility model, comprise that the basin frame that is provided with annular accepting hole, magnetic circuit system, the part that is contained in the basin frame are suspended at the voice coil loudspeaker voice coil of magnetic circuit system, the vibrating diaphragm that is connected with voice coil loudspeaker voice coil, cover the loam cake that is connected to the basin frame, wherein magnetic circuit system comprises loading on the T type magnet frame that has the magnetic post, the T type magnet frame and contacts the magnet that has the magnetic hole with basin frame madial wall, and the magnetic borehole jack is located on the magnetic post and constitutes magnetic gap.

Preferably, magnet is provided with the corresponding pole piece of shape.

Described magnet is the square-outside and round-inside type.

The utility model electroacoustic energy microphone device, in being provided with the basin frame of annular accepting hole, connect to load on the T type magnet frame have the magnetic post, the T type magnet frame and contact the magnet that has the magnetic hole with basin frame madial wall, the magnetic borehole jack is located on the magnetic post and constitutes magnetic gap, the part voice coil loudspeaker voice coil is suspended in the magnetic gap, expand the magnet steel size thus to greatest extent, obtain highdensity magnetic flux, improve the sensitivity of voice coil loudspeaker voice coil, avoid the phenomenon of transient distortion to produce, help the reliable of acoustical generator tonequality.

[description of drawings]

Fig. 1 is the utility model blast structural representation;

Fig. 2 is a generalized section of the present utility model.

[embodiment]

The utility model is described in further detail below in conjunction with drawings and embodiments.

As Fig. 1, shown in 2, be one preferred embodiment of the utility model electroacoustic energy microphone device, it comprises the basin frame 20 of accommodating the required element of this microphone device, be attached to the loam cake 10 on the basin frame 20, the central part of loam cake 10 has hole 11, basin frame 20 has annular accepting hole, accommodate T type magnet frame 30 in the annular accepting hole, the central part of T type magnet frame 30 has the magnetic post 31 of column, load on the T type magnet frame 30 and contact the tabular magnet 40 that has magnetic hole 41 with basin frame 20 madial walls, magnetic hole 41 is enclosed within on the magnetic post 31, and certain interval is arranged apart from magnetic post 31 outer surfaces, this gap is a magnetic gap, and the invisible magnetic line of force is arranged in the magnetic gap.Magnet 40 outward flanges contact with basin frame 20, be the size of expansion magnet 40 like this, make that magnetic gap obtains highdensity magnetic flux in the whole magnetic circuit system, also be provided with the pole piece 50 of contact on magnet 40 tops, pole piece 50 is corresponding with magnet 40 shapes, promptly all be the square-outside and round-inside type, central part also is provided with pole piece magnetic hole 51, pole piece magnetic hole 51 and magnetic hole 41 location overlaps.The part that suspends in magnetic gap voice coil loudspeaker voice coil 60, voice coil loudspeaker voice coil 60 tops are connecting vibrating diaphragm 70, and vibrating diaphragm 70 sky are covering loam cake 10.When feeding the alternation tone currents, voice coil loudspeaker voice coil 70 is subjected to the motive force of alternation in magnetic gap, cut the highdensity magnetic line of force, and magnetic flux density is the loudspeaker sensitivity height greatly then, otherwise then little.So just improve the sensitivity of voice coil loudspeaker voice coil, thereby drive the and then reaction speed vibration of music rhythm of vibrating diaphragm 70, send sound clearly, avoid the phenomenon of transient distortion to produce, help the reliable of acoustical generator tonequality.

Above-described only is execution mode of the present utility model; should be pointed out that for the person of ordinary skill of the art at this, under the prerequisite that does not break away from the utility model creation design; can also make improvement, but these all belong to protection range of the present utility model.

Claims

1, a kind of electroacoustic energy microphone device, comprise that the basin frame that is provided with annular accepting hole, magnetic circuit system, the part that is contained in the basin frame are suspended at the voice coil loudspeaker voice coil of magnetic circuit system, the vibrating diaphragm that is connected with voice coil loudspeaker voice coil, cover the loam cake that is connected to the basin frame, it is characterized in that: magnetic circuit system comprises loading on the T type magnet frame that has the magnetic post, the T type magnet frame and contacts the magnet that has the magnetic hole with basin frame madial wall that the magnetic borehole jack is located on the magnetic post and constitutes magnetic gap.

2, electroacoustic energy microphone device according to claim 1, it is characterized in that: magnet is provided with the corresponding pole piece of shape.

3, electroacoustic energy microphone device according to claim 1, it is characterized in that: described magnet is the square-outside and round-inside type.