CN204887405U - Loudspeaker - Google Patents

Loudspeaker Download PDF

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Publication number
CN204887405U
CN204887405U CN201520558164.6U CN201520558164U CN204887405U CN 204887405 U CN204887405 U CN 204887405U CN 201520558164 U CN201520558164 U CN 201520558164U CN 204887405 U CN204887405 U CN 204887405U
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China
Prior art keywords
magnetic yoke
conductive magnetic
shell
loud speaker
powder metallurgy
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CN201520558164.6U
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Chinese (zh)
Inventor
徐增强
陈钢
张志兵
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Goertek Inc
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Goertek Inc
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Priority to CN201520558164.6U priority Critical patent/CN204887405U/en
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Abstract

The utility model provides a loudspeaker, including the shell with accept the magnetic circuit in the shell, magnetic circuit is including fixing magnetic conduction yoke on the shell, being located the magnet of magnetic conduction yoke center and being located the china department that magnetic conduction yoke one side was kept away from to magnet, wherein, the magnetic conduction yoke is the metalwork, and the shell is the powder metallurgy shell, the magnetic conduction yoke is as the integrative cast shaping of inserts and powder metallurgy shell. Utilizing above -mentioned utility model, can realizing that metal casing and the integrative of metal magnetic conduction yoke set up, the heat dissipation is fast, acoustic performance is good.

Description

Loud speaker
Technical field
The utility model relates to technical field of acoustics, more specifically, relates to a kind of loud speaker.
Background technology
At present, the conductive magnetic yoke of loud speaker is after punch forming, and edge part branch is out of shape naturally, and for realizing the accurate location between conductive magnetic yoke and shell, also need the conductive magnetic yoke after to punching press to carry out post forming, complex process, cost are higher.In addition, the sidewall thickness due to conductive magnetic yoke requires consistent, and the shape also limiting conductive magnetic yoke to a certain extent can not be too complicated, is unfavorable for the operating heat radiation of loud speaker module and magnetic conduction.
In addition, when being mounted with the shell of loud speaker and conductive magnetic yoke, just partial face contact therebetween, bonding strength is restricted greatly, exist conductive magnetic yoke from shell come off may.In addition, plastic casing can not magnetic conduction, heat conduction, metal shell by the impact of the factors such as material, shape, limited contact area, heat conduction and magnetic conduction effect also undesirable.
Utility model content
In view of the above problems, the purpose of this utility model is to provide a kind of loud speaker, to solve the restriction by own material and connected mode of the conductive magnetic yoke of current loud speaker and shell, cause conductive magnetic yoke and frame magnetic conduction/heat-conducting effect is not good, bonding strength not, have that conductive magnetic yoke comes off may wait problem.
The loud speaker that the utility model provides, comprise shell and collecting magnetic circuit system in the enclosure, magnetic circuit system comprises the conductive magnetic yoke be fixed on shell, is positioned at the magnet of conductive magnetic yoke center and is positioned at the washer of magnet away from conductive magnetic yoke side; Wherein, conductive magnetic yoke is metalwork, and shell is powder metallurgy shell; Conductive magnetic yoke is as inserts and powder metallurgy shell one cast molding.
In addition, preferred structure is, conductive magnetic yoke is SPCG, SPCC, SPCD or SPCE stamping parts.
In addition, preferred structure is, powder metallurgy shell is carbon structural steels.
In addition, preferred structure is provided with back-off structure in conductive magnetic yoke, and conductive magnetic yoke is engaged fixing by back-off structure with powder metallurgy shell back-off.
In addition, preferred structure is, back-off structure is the some groove/land be arranged in conductive magnetic yoke; On powder metallurgy shell, the position of respective slot/projection forms corresponding projections/grooves; Conductive magnetic yoke is fixed by groove and protruding occlusion with powder metallurgy shell.
In addition, preferred structure is, the cross section of groove/land is rectangle.
In addition, preferred structure is, magnet and washer are housed in conductive magnetic yoke.
In addition, preferred structure is, goes back involving vibrations system; Wherein, vibrational system comprises vibrating diaphragm, be sticked the voice coil loudspeaker voice coil in vibrating diaphragm side and be positioned at the reinforcement part of vibrating diaphragm center.
In addition, preferred structure is, vibrating diaphragm and conductive magnetic yoke form the rear operatic tunes of loud speaker; On conductive magnetic yoke, magnet and washer, be provided with through hole corresponding to position respectively, the rear operatic tunes is in communication with the outside by each through hole.
In addition, preferred structure is, also comprises the FPCB connecting loud speaker peripheral circuits; FPCB is fixed on shell, and is electrically connected with voice coil leads.
From technical scheme above, loud speaker of the present utility model, realizes fully contacting between shell with conductive magnetic yoke by the powder metallurgy shell that is wholely set and metal guide yoke, can transmit loud speaker fast and produce heat, expand the transmission scope of magnetic induction line, promote the acoustical behavior of loud speaker; In addition, powder metallurgy precision is high, cost is low, do not need to carry out secondary operations to conductive magnetic yoke, can guarantee the quality of loud speaker while reducing production cost.
Accompanying drawing explanation
By reference to the content below in conjunction with the description of the drawings and claims, and understand more comprehensively along with to of the present utility model, other object of the present utility model and result will be understood and easy to understand more.In the accompanying drawings:
Fig. 1 is the loud speaker explosive view according to the utility model embodiment;
Fig. 2 is the loud speaker profile according to the utility model embodiment;
Fig. 3 is the loud speaker vertical view according to the utility model embodiment.
Reference numeral wherein comprises: vibrating diaphragm 1, voice coil loudspeaker voice coil 2, powder metallurgy shell 3, FPCB4, washer 5, magnet 6, conductive magnetic yoke 7, back-off structure 8.
Label identical in all of the figs indicates similar or corresponding feature or function.
Embodiment
Shell for aforementioned speakers dispel the heat with conductive magnetic yoke/magnetic conduction weak effect, assemble complicated, be connected the problems such as insecure, conductive magnetic yoke of the present utility model is the metalwork that punching press is formed, and embed in powder metallurgy shell as inserts, conductive magnetic yoke and shell are wholely set, and bonding strength is high, and metal material effectively can transmit the heat of loud speaker, and magnetic induction line is passed to larger region, improve the acoustical behavior of loud speaker, reduce the assembly process of loud speaker module, reduce production cost.
For describing the loadspeaker structure that the utility model provides in detail, below with reference to accompanying drawing, specific embodiment of the utility model is described in detail.
Fig. 1 shows the loud speaker detonation configuration according to the utility model embodiment; Fig. 2 shows the loud speaker cross-section structure according to the utility model embodiment; Fig. 3 shows the loud speaker plan structure according to the utility model embodiment.
As Fig. 1 to Fig. 3 jointly shown in, the loud speaker of the utility model embodiment comprises: shell 3 and the magnetic circuit system be housed in shell 3, and magnetic circuit system comprises the conductive magnetic yoke 7 be fixed on shell 3, is positioned at the magnet 6 of conductive magnetic yoke 7 center and is positioned at the washer 5 of magnet 6 away from conductive magnetic yoke 7 side; Wherein, conductive magnetic yoke 7 is metalwork, and shell is powder metallurgy shell 3; Conductive magnetic yoke 7 is as inserts and powder metallurgy shell 3 one cast molding.
Particularly, conductive magnetic yoke 7 adopts the good metal material punching press of magnetic property to be formed, in an embodiment of the present utility model, conductive magnetic yoke 7 can adopt SPCG (SteelPlateColdGlossy, minute surface cold-rolled steel sheet), SPCC (SteelPlateColdCommon, regular grade cold-rolled steel sheet), SPCD (SteelPlateColdDraw, punch level cold-rolled steel sheet) or the punching press such as SPCE (SteelPlateColdElongation, deep-draw level cold-rolled steel sheet) formed.
Powder metallurgy shell 3 is formed in the basic top casting of conductive magnetic yoke 7 stamping parts, wherein, in the casting cycle of powder metallurgy shell 3, conductive magnetic yoke 7 is placed in the mould of shell casting as inserts, then using metal or metal dust as raw material, compacting sintering forms powder metallurgy shell 3, and now namely conductive magnetic yoke 7 embeds in powder metallurgy shell 3, and the two forms integrative-structure.In the process, powder metallurgy shell is preferably the material close with conductive magnetic yoke physical property, such as carbon structural steels etc.This connected mode, on the one hand, can realize powder metallurgy shell 3 and contact with the abundant face of conductive magnetic yoke 7, improves bonding strength therebetween; On the other hand, the shell of metal material and conductive magnetic yoke can transmit the heat distributed by loud speaker fast, and magnetic induction line is passed to larger region, promote the acoustical behavior of loud speaker.
For improving the firmness between conductive magnetic yoke 7 and powder metallurgy shell 3 further, in another embodiment of the present utility model, conductive magnetic yoke 7 is provided with back-off structure 8, namely, formed in the process of conductive magnetic yoke 7 in punching press, conductive magnetic yoke 7 is formed several back-off structure 8, when conductive magnetic yoke 7 is embedded in powder metallurgy shell 3 as inserts, can be interlocked by the back-off of back-off structure 8 with powder metallurgy shell, guarantee the bonding strength between conductive magnetic yoke 7 and powder metallurgy shell, fall requirement with what meet speaker product.
Wherein, back-off structure 8 is for being arranged on the groove/land in conductive magnetic yoke 7, in the process that powder metallurgy shell 3 is formed, the position of corresponding conductive magnetic yoke 7 groove/land forms corresponding projections/grooves, and conductive magnetic yoke 7 is fixed by groove and protruding occlusion with powder metallurgy shell 3.Known, this back-off structure is not limited to groove or projection, and all to realize between conductive magnetic yoke 7 with powder metallurgy shell 3 firm is connected for the step of similar functions, barb or cavity etc.
Wherein, the groove shown in present embodiment is rectangle with protruding cross section, and in fact, when specifically implementing, being also not limited to this shape, can be other arbitrary shapes such as ellipse, arc.
In addition, it should be noted that, other magnetic circuit assemblies (comprising magnet 6 and washer 5) are all accommodated in conductive magnetic yoke 7; In addition, the loud speaker of the utility model embodiment, also comprises the FPCB (FlexPrintcircuitBoard, flexible printed wiring board) 4 and vibrational system that connect loud speaker peripheral circuits; Wherein, FPCB4 is fixed on powder metallurgy shell 3, is electrically connected with voice coil leads, to realize the conducting of loud speaker peripheral circuits; Vibrational system comprises vibrating diaphragm 1, is pasted onto the voice coil loudspeaker voice coil 2 of vibrating diaphragm 1 side, and is positioned at the reinforcement part of vibrating diaphragm 1 center.Wherein, vibrating diaphragm 1 comprise be fixedly connected with shell fixed part, with vibrating diaphragm fixed part be wholely set recessed/the ring portion of male structure and be positioned at the planar portions in ring portion.Be provided with the reinforcement part regulating loud speaker acoustical behavior in vibrating diaphragm planar portions, for reducing the quality of vibrational system, generally arranged the position of corresponding for vibrating diaphragm planar portions reinforcement part and remove material, reinforcement part directly overlays this and goes material level to put.
Wherein, the cavity formed between vibrating diaphragm 1 and conductive magnetic yoke 7 is the rear operatic tunes (back cavity) of loud speaker, identical with the front operatic tunes for ensureing the air pressure in the rear operatic tunes, in the utility model, on conductive magnetic yoke 7, magnet 6 and washer 5, be provided with through hole corresponding to position respectively, the rear operatic tunes is communicated with ambient atmosphere by each through hole.Wherein, the shape of through hole can be circle, rectangle or polygon etc., guarantees that each through hole upper-lower position of conductive magnetic yoke 7, magnet 6 and washer 5 is corresponding.
Particularly, conductive magnetic yoke 7 and powder metallurgy shell 3 are wholely set, and washer 5, magnet 6 are incorporated into the inside of conductive magnetic yoke 7 from top to bottom successively.Wherein, conductive magnetic yoke 7 is mainly used in fixed magnet 6 and revises the magnetic line of force, comprise bottom and with the sidewall that bottom vertical is arranged, between magnet 6 and the sidewall of washer 5 and conductive magnetic yoke 7, form magnetic gap, voice coil loudspeaker voice coil 2 is hung in this magnetic gap.
Can be found out by above-mentioned execution mode, the loud speaker that the utility model provides has the following advantages:
1, metal shell and metal guide yoke are wholely set, and can realize fully contacting of shell and conductive magnetic yoke, good heat dissipation effect, and magnetic induction line can be passed to larger region, promote the acoustical behavior of loud speaker.
2, powder metallurgy precision is high, cost is low, do not need the locating surface repeating processing conductive magnetic yoke, can make conductive magnetic yoke or the shell of complicated shape, the requirement such as sealing, waterproof of the loud speaker module that is content with very little.
3, reduce the assembly process of loud speaker module, enhance productivity, reduce production cost.
4, the conductive magnetic yoke arranging back-off structure embeds in powder metallurgy shell as inserts, and can improve the bonding strength of shell and conductive magnetic yoke, what meet electronic product falls requirement.
5, powder metallurgy material is for common metal, can not only realize comparatively complicated curved surface and the outer casing forming of uneven wall thickness, and good heat conductivity, is easily distributed in time by the heat that loud speaker produces, guarantees the stable performance of loud speaker.
The loud speaker according to the utility model proposes is described in an illustrative manner above with reference to accompanying drawing.But, it will be appreciated by those skilled in the art that the loud speaker that above-mentioned the utility model is proposed, various improvement can also be made on the basis not departing from the utility model content.Therefore, protection range of the present utility model should be determined by the content of appending claims.

Claims (10)

1. a loud speaker, comprise shell and be housed in the magnetic circuit system in described shell, described magnetic circuit system comprises the conductive magnetic yoke of fixing on the housing, the magnet being positioned at described conductive magnetic yoke center and is positioned at the washer of described magnet away from described conductive magnetic yoke side; It is characterized in that,
Described conductive magnetic yoke is metalwork, and described shell is powder metallurgy shell;
Described conductive magnetic yoke is as inserts and described powder metallurgy shell one cast molding.
2. loud speaker as claimed in claim 1, is characterized in that,
Described conductive magnetic yoke is SPCG, SPCC, SPCD or SPCE stamping parts.
3. loud speaker as claimed in claim 1, is characterized in that,
Described powder metallurgy shell is carbon structural steels.
4. loud speaker as claimed in claim 2, is characterized in that,
Described conductive magnetic yoke is provided with back-off structure, and described conductive magnetic yoke is engaged fixing by described back-off structure with described powder metallurgy shell back-off.
5. loud speaker as claimed in claim 4, is characterized in that,
Described back-off structure is the some groove/land be arranged in described conductive magnetic yoke;
On described powder metallurgy shell, the position of corresponding described groove/land forms corresponding projections/grooves;
Described conductive magnetic yoke is fixed by described groove and protruding occlusion with described powder metallurgy shell.
6. loud speaker as claimed in claim 5, is characterized in that,
The cross section of described groove/land is rectangle.
7. loud speaker as claimed in claim 1, is characterized in that,
Described magnet and washer are housed in described conductive magnetic yoke.
8. loud speaker as claimed in claim 1, is characterized in that, go back involving vibrations system; Wherein,
Described vibrational system comprises vibrating diaphragm, be sticked the voice coil loudspeaker voice coil in vibrating diaphragm side and be positioned at the reinforcement part of described vibrating diaphragm center.
9. loud speaker as claimed in claim 8, is characterized in that,
Space between described vibrating diaphragm and described conductive magnetic yoke forms the rear operatic tunes of described loud speaker;
On described conductive magnetic yoke, magnet and washer, be provided with through hole corresponding to position respectively, the described rear operatic tunes is in communication with the outside by each through hole.
10. loud speaker as claimed in claim 1, is characterized in that, also comprises the FPCB connecting loud speaker peripheral circuits;
Described FPCB is fixing on the housing, and is electrically connected with voice coil leads.
CN201520558164.6U 2015-07-28 2015-07-28 Loudspeaker Active CN204887405U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201520558164.6U CN204887405U (en) 2015-07-28 2015-07-28 Loudspeaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201520558164.6U CN204887405U (en) 2015-07-28 2015-07-28 Loudspeaker

Publications (1)

Publication Number Publication Date
CN204887405U true CN204887405U (en) 2015-12-16

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201520558164.6U Active CN204887405U (en) 2015-07-28 2015-07-28 Loudspeaker

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111010653A (en) * 2019-12-11 2020-04-14 瑞声科技(新加坡)有限公司 Method for manufacturing magnetic circuit system
CN111031466A (en) * 2019-12-11 2020-04-17 瑞声科技(新加坡)有限公司 Method for manufacturing magnetic circuit system
CN111372177A (en) * 2019-11-21 2020-07-03 瑞声科技(新加坡)有限公司 Loudspeaker
WO2020258796A1 (en) * 2019-06-27 2020-12-30 歌尔股份有限公司 Sound producing device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020258796A1 (en) * 2019-06-27 2020-12-30 歌尔股份有限公司 Sound producing device
CN111372177A (en) * 2019-11-21 2020-07-03 瑞声科技(新加坡)有限公司 Loudspeaker
CN111010653A (en) * 2019-12-11 2020-04-14 瑞声科技(新加坡)有限公司 Method for manufacturing magnetic circuit system
CN111031466A (en) * 2019-12-11 2020-04-17 瑞声科技(新加坡)有限公司 Method for manufacturing magnetic circuit system

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Address after: 261031 Dongfang Road, Weifang high tech Industrial Development Zone, Shandong, China, No. 268

Patentee after: Goertek Inc.

Address before: 261031 Dongfang Road, Weifang high tech Industrial Development Zone, Shandong, China, No. 268

Patentee before: Goertek Inc.