CN108513228A - Loud speaker and portable terminal - Google Patents

Loud speaker and portable terminal Download PDF

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Publication number
CN108513228A
CN108513228A CN201810667411.4A CN201810667411A CN108513228A CN 108513228 A CN108513228 A CN 108513228A CN 201810667411 A CN201810667411 A CN 201810667411A CN 108513228 A CN108513228 A CN 108513228A
Authority
CN
China
Prior art keywords
vibrating diaphragm
hole
magnetic
center
loud speaker
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201810667411.4A
Other languages
Chinese (zh)
Inventor
王兴龙
刘华伟
葛连山
刘春发
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Goertek Inc
Original Assignee
Goertek Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Goertek Inc filed Critical Goertek Inc
Priority to CN201810667411.4A priority Critical patent/CN108513228A/en
Publication of CN108513228A publication Critical patent/CN108513228A/en
Pending legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00Diaphragms for electromechanical transducers; Cones
    • H04R7/16Mounting or tensioning of diaphragms or cones
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02Details
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02Details
    • H04R9/04Construction, mounting, or centering of coil
    • H04R9/045Mounting
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/06Loudspeakers
    • H04R9/066Loudspeakers using the principle of inertia

Abstract

The present invention discloses a kind of loud speaker and portable terminal, wherein the loud speaker includes the first vibrational system, the second vibrational system and magnetic circuit system, and the first vibrational system includes the first vibrating diaphragm and the voice coil on the inside of the first vibrating diaphragm;Second vibrational system includes the second vibrating diaphragm being oppositely arranged with the first vibrating diaphragm;Magnetic circuit system is set between the first vibrating diaphragm and the second vibrating diaphragm, first operatic tunes is formed between magnetic circuit system and the first vibrating diaphragm, voice coil is contained in the magnetic gap of magnetic circuit system;Second operatic tunes is formed between magnetic circuit system and the second vibrating diaphragm, and through-hole is equipped between first operatic tunes and second operatic tunes.Two sets of vibrational systems are arranged in loud speaker provided by the invention, but only with a set of voice coil and magnetic circuit system to realize that it is small that the structure of Bidirectional sounding occupies, convenient for being widely used in portable terminal.

Description

Loud speaker and portable terminal
Technical field
The present invention relates to electroacoustic techniques field, more particularly to a kind of loud speaker and portable terminal.
Background technology
Currently, important component of the loud speaker as the terminal with audio playing function, is widely used.Some ends End, especially portable terminal, if mobile phone, tablet computer, earphone can be that the installation space that loud speaker provides is very limited, because This, the existing loud speaker that can be applied to narrow installation space, the structure of the single vibrating diaphragm front sounding of generally use.For reality Showing Bidirectional sounding, the prior art provides a kind of two sets of voice coils of use and the composite structure of vibrating diaphragm and the loud speaker of magnetic circuit system, Wherein magnetic circuit system has double magnetic gap, is respectively used to accommodate two voice coils, but the usual volume of this loud speaker is larger, it is difficult to To extensive use.Also, the composite structure of structure in the prior art, a set of voice coil and vibrating diaphragm and another set of voice coil and vibrating diaphragm Composite structure be work independently, it is a set of be used as high frequency acoustical generator, it is another set of be used as low-frequency audible signal device, can not achieve simultaneously bi-directionally Sounding.
Invention content
The main object of the present invention is to provide a kind of loud speaker, it is intended to solve it is existing realize Bidirectional sounding loud speaker because Volume is larger and the technical issues of being difficult to extensive use.
To achieve the above object, loud speaker proposed by the present invention, including:
First vibrational system, including the first vibrating diaphragm and the voice coil on the inside of first vibrating diaphragm;
Second vibrational system includes the second vibrating diaphragm being oppositely arranged with first vibrating diaphragm;And
Magnetic circuit system is set between first vibrating diaphragm and the second vibrating diaphragm, the magnetic circuit system and first vibrating diaphragm it Between form first operatic tunes, the voice coil is contained in the magnetic gap of the magnetic circuit system;The magnetic circuit system shakes with described second Second operatic tunes is formed between film, and through-hole is equipped between first operatic tunes and second operatic tunes;
The voice coil drives the first diaphragm oscillations sounding, the air-flow that the first diaphragm oscillations sounding generates to pass through successively It crosses first operatic tunes, the through-hole, second operatic tunes and is transferred to second vibrating diaphragm, and then second vibrating diaphragm is driven to shake Dynamic sounding.
Preferably, the through-hole is arranged on the magnetic circuit system.
Preferably, the magnetic circuit system includes conductive magnetic yoke and the center magnetic path portion in the conductive magnetic yoke and side magnetic circuit Part;The magnetic gap for accommodating the voice coil is formed between the center magnetic path portion and side magnetic circuit part;The center magnetic path portion Point and at least one of the side magnetic circuit part be equipped with permanent magnet;The through-hole includes the corresponding conductive magnetic yoke and center magnetic path The central through hole of part setting.
Preferably, the center magnetic path portion includes conductive magnetic yoke, is set to the center magnet steel of the conductive magnetic yoke bottom, Yi Jishe Magnetic conductive board at the top of the center magnet steel;
The first endoporus is offered in the conductive magnetic yoke, the center magnet steel offers the second endoporus, opened in the conductive magnetic yoke Equipped with third endoporus, first endoporus, the second endoporus and the third endoporus are connected to form the central through hole.
Preferably, the center magnet steel includes the two sub- magnet steel mutually spliced, the piece of the two sub- magnet steel and described the Two endoporus connect;Wherein, the two sub- magnet steel are symmetrical about the perpendicular at second endoporus center excessively;Alternatively, two institutes State central symmetry of the sub- magnet steel about second endoporus.
Preferably, the center magnet steel, which is equipped with, is connected to the second endoporus internal face and the center magnet steel peripheral surface Joint-cutting.
Preferably, the magnetic circuit system includes conductive magnetic yoke and the center magnetic path portion in the conductive magnetic yoke and side magnetic circuit Part;The magnetic gap for accommodating the voice coil is formed between the center magnetic path portion and side magnetic circuit part;The center magnetic path portion Point and at least one of the side magnetic circuit part be equipped with permanent magnet;The through-hole further includes that the corresponding magnetic gap is arranged in institute State the side through-hole in conductive magnetic yoke, the side through-hole be provided with it is at least one, when side through-hole is provided with multiple, Duo Gesuo State circumferentially-spaced arrangement of the side through-hole along the magnetic gap;Alternatively, the through-hole further includes being arranged in the end of the conductive magnetic yoke Side through-hole.
Preferably, the sound that first vibrating diaphragm is generated away from second vibrating diaphragm side is received by human ear, and described the The sound that two vibrating diaphragms are generated away from first vibrating diaphragm side receives described in human ear.
Preferably, second vibrating diaphragm includes central part, is set around the ring portion that central part is arranged and around ring portion The fixed part set;The central part is plane platelet structures, and the ring portion is the structure being made of a protrusion or described Ring portion is by least one protrusion and at least one wavy shaped configuration constituted that is recessed.
Preferably, second vibrating diaphragm further includes the composite layer for being incorporated into the central part.
Preferably, the through-hole includes the centrally disposed central through hole of corresponding first vibrating diaphragm, and the composite layer corresponds to Central through hole setting, the composite layer evagination setting, its concave surface of the composite layer of evagination is towards the central through hole.
Preferably, first vibrating diaphragm includes central part, is set around the ring portion that central part is arranged and around ring portion The central part of the fixed part set, first vibrating diaphragm is plane platelet structures.
The present invention also proposes that a kind of portable terminal, including shell, the enclosure interior have accommodating cavity, the portable terminal Further include the loud speaker, the loud speaker includes the first vibrational system, the second vibrational system and magnetic circuit system, and described first shakes Dynamic system includes the first vibrating diaphragm and the voice coil on the inside of first vibrating diaphragm;Second vibrational system includes and described first The second vibrating diaphragm that vibrating diaphragm is oppositely arranged;The magnetic circuit system is set between first vibrating diaphragm and the second vibrating diaphragm, the magnetic circuit system First operatic tunes is formed between system and first vibrating diaphragm, the voice coil is contained in the magnetic gap of the magnetic circuit system;The magnetic Second operatic tunes is formed between road system and second vibrating diaphragm, the magnetic circuit system, which is equipped with, is connected to first operatic tunes and the rising tone The through-hole of chamber;The loud speaker is mounted on the accommodating cavity, and the shell offers the first acoustic aperture of corresponding first vibrating diaphragm, And the second acoustic aperture of corresponding second vibrating diaphragm.
Preferably, there is the shell front being oppositely arranged and reverse side, first acoustic aperture to be set to the shell just Face, second acoustic aperture are set to the reverse side of the shell;First vibrating diaphragm is away from the space of second vibrating diaphragm and described the One acoustic aperture is connected to, and first acoustic aperture is for conducting the sound that first vibrating diaphragm is sent out;Second vibrating diaphragm is away from described the The space of one vibrating diaphragm is connected to second acoustic aperture, and second acoustic aperture is for conducting the sound that second vibrating diaphragm is sent out.
Loud speaker of the present invention is by using two sets of vibrational systems of setting, but only with a set of voice coil and magnetic circuit system to realize The structure of Bidirectional sounding occupies small, convenient for being widely used in portable terminal.When the speaker operation of the present invention, first by magnetic Road system directly drives the vibrating diaphragm of the first vibrational system so that the air of first operatic tunes compresses or expansion, due to first operatic tunes with It is equipped with through-hole between second operatic tunes to be connected to, air in through-hole by circulating, and under the promotion of air-flow, the second vibrational system is shaken Film vibration sounding therewith, second operatic tunes linkage expansion or compression, are consequently formed positive first vibrating diaphragm and actively radiate, and the of reverse side The Bidirectional sounding structure that two vibrating diaphragms passively radiate, and the first vibrating diaphragm and the second vibrating diaphragm vibrate simultaneously, realize double in the same time To sounding.When applied to portable terminal, loud speaker of the invention can be distinguished by the first vibrational system and the second vibrational system To the positive and negative both direction sounding of portable terminal.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with The structure shown according to these attached drawings obtains other attached drawings.
Fig. 1 is the positive structure schematic of one embodiment of loud speaker of the present invention;
Fig. 2 is the structure schematic diagram of loud speaker in Fig. 1;
Fig. 3 is a cross-sectional view of loud speaker in Fig. 1, wherein illustrating the first embodiment of the second vibrating diaphragm;
Fig. 4 is the right end enlarged diagram of structure in Fig. 3;
Fig. 5 is the right end enlarged diagram of structure in Fig. 3, is shaken wherein the first embodiment of the second vibrating diaphragm is replaced by second The second embodiment of film;
Fig. 6 is a cross-sectional view of loud speaker in Fig. 1, wherein illustrating the 3rd embodiment of the second vibrating diaphragm;
Fig. 7 is the partial enlarged view at A in Fig. 6.
Fig. 8 is the part-structure schematic diagram of loud speaker in Fig. 1;
Fig. 9 is the configuration schematic diagram of loud speaker in Fig. 1, wherein illustrating the first embodiment of magnetic circuit system;
Figure 10 is the structural schematic diagram of its magnetic circuit system second embodiment of loud speaker of the present invention;
Figure 11 is the structural schematic diagram of its magnetic circuit system 3rd embodiment of loud speaker of the present invention;
Figure 12 is the structural schematic diagram of its magnetic circuit system fourth embodiment of loud speaker of the present invention;
Figure 13 is the positive structure schematic of one embodiment of portable terminal of the present invention;
Figure 14 is the structure schematic diagram of portable terminal in Figure 13;
Figure 15 is the part section structural representation at B in Figure 13.
Drawing reference numeral explanation:
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation describes, it is clear that described embodiment is only a part of the embodiment of the present invention, instead of all the embodiments.Base Embodiment in the present invention, those of ordinary skill in the art obtained without creative efforts it is all its His embodiment, shall fall within the protection scope of the present invention.
It is to be appreciated that the directional instruction (such as up, down, left, right, before and after ...) of institute is only used in the embodiment of the present invention In explaining relative position relation, motion conditions etc. under a certain particular pose (as shown in the picture) between each component, if should When particular pose changes, then directionality instruction also correspondingly changes correspondingly.
In addition, the description for being related to " first ", " second " etc. in the present invention is used for description purposes only, and should not be understood as referring to Show or imply its relative importance or implicitly indicates the quantity of indicated technical characteristic." first ", " are defined as a result, Two " feature can explicitly or implicitly include at least one of the features.In addition, the technical solution between each embodiment can To be combined with each other, but must can be implemented as basis with those of ordinary skill in the art, when the combination of technical solution occurs Conflicting or cannot achieve when, will be understood that the combination of this technical solution is not present, also not the present invention claims protection model Within enclosing.
The present invention proposes a kind of loud speaker, please refers to Fig. 1 to Fig. 3 and Fig. 8, in one embodiment, the loud speaker 210, Including:
First vibrational system 1, including the first vibrating diaphragm 11 and the voice coil 12 set on 11 inside of the first vibrating diaphragm;
Second vibrational system 2 includes the second vibrating diaphragm (21a, 21b, 21c) being oppositely arranged with the first vibrating diaphragm 11;And
Magnetic circuit system (3a, 3b, 3c, 3d) is set between the first vibrating diaphragm 11 and the second vibrating diaphragm (21a, 21b, 21c), magnetic circuit Form first operatic tunes 4 between system (3a, 3b, 3c, 3d) and the first vibrating diaphragm 11, voice coil 12 be contained in magnetic circuit system (3a, 3b, 3c, In magnetic gap 31 3d);Second operatic tunes is formed between magnetic circuit system (3a, 3b, 3c, 3d) and the second vibrating diaphragm (21a, 21b, 21c) 5, through-hole 32 is equipped between first operatic tunes, 4 and second operatic tunes 5.
The voice coil 12 drives 11 vibration sounding of the first vibrating diaphragm, the air-flow that 11 vibration sounding of the first vibrating diaphragm generates Successively by first operatic tunes 4, the through-hole 32, second operatic tunes 5 be transferred to second vibrating diaphragm (21a, 21b, 21c), and then the second vibrating diaphragm (21a, 21b, 21c) vibration sounding is driven.
In the present embodiment, to simplify the description, position when the first vibrating diaphragm 11 of loud speaker 210 being placed upward is ginseng It examines and defines up and down, is i.e. the first vibrating diaphragm 11 is upper backwards to the side of magnetic circuit system (3a, 3b, 3c, 3d), and the first vibrating diaphragm 11 is towards magnetic circuit Under the side of system (3a, 3b, 3c, 3d) is.
First vibrational system 1 can refer to existing form, specifically, voice coil 12 is fixedly connected and stretches with the first vibrating diaphragm 11 Enter magnetic gap 31, the electric current of the connection variation of voice coil 12 is then vibrated by different size of Ampere force, and the vibration of voice coil 12 drives the One vibrating diaphragm 11 vibrates, and energy conversion mode is electric energy-mechanical energy-acoustic energy.In order to adjust the frequency characteristic of vibration, first shakes Dynamic system 1 may also include clump weight.
The form of magnetic circuit system (3a, 3b, 3c, 3d) can also refer to existing structure, such as magnetic gap 31 both can be with shape At between center magnet steel (34a, 34b, 34c, 34d) and side magnet steel, center magnet steel (34a, 34b, 34c, 34d) can also be formed Between the side wall of conductive magnetic yoke 33.The plan view shape of center magnet steel (34a, 34b, 34c, 34d) both can be round Round rectangle etc..
In order to facilitate the installation of the first vibrational system 1, the second vibrational system 2 and positioned between the two magnetic circuit system (3a, 3b, 3c, 3d), loud speaker 210 further includes shell 6, protecgulum 7 and rear cover 8, and shell 6 shakes for the first vibrational system 1 of receiving, second Dynamic system 2 and magnetic circuit system (3a, 3b, 3c, 3d).Protecgulum 7 and rear cover 8 cooperatively form protect-ing frame structure with shell 6, specifically, the The edge part for fixing of one vibrating diaphragm 11 is clamped by protecgulum 7 and shell 6, and the second vibrating diaphragm (21a, 21b, 21c) is used to fix Edge part be clamped by rear cover 8 and shell 6.Protecgulum 7 corresponds to the first vibrational system 1 and is arranged and equipped with for speaking before sound outgoing Hole 71, rear cover 8 correspond to the second vibrational system 2 and equipped with for going out acoustic aperture 81 after sound outgoing.
Through-hole 32 opens up form, can only open up magnetic circuit system (3a, 3b, 3c, 3d), can also be opened in shell 6 On, if it can be connected to first operatic tunes 4 and second operatic tunes 5, and the circulation area size of through-hole 32 is enough to make the circulation in through-hole 32 Air-flow can push the second vibrating diaphragm (21a, 21b, 21c) sounding.
Loud speaker 210 of the present invention is by using two sets of vibrational systems of setting, but only with a set of voice coil 12 and magnetic circuit system (3a, 3b, 3c, 3d) with realize Bidirectional sounding structure occupy it is small, convenient for being widely used in portable terminal 100.This hair When bright loud speaker 210 works, the vibrating diaphragm of the first vibrational system 1 is first directly driven by magnetic circuit system (3a, 3b, 3c, 3d) so that The air of first operatic tunes 4 compresses or expansion, and due to being connected to equipped with through-hole 32 between first operatic tunes 4 and second operatic tunes 5, air passes through The circulation in through-hole 32, under the promotion of air-flow, the vibrating diaphragm of the second vibrational system 2 therewith expand by vibration sounding, the linkage of second operatic tunes 5 It opens or compresses, positive first vibrating diaphragm 11 is consequently formed and actively radiates, the second vibrating diaphragm (21a, 21b, 21c) of reverse side passively radiates Bidirectional sounding structure, and the first vibrating diaphragm 11 and the second vibrating diaphragm (21a, 21b, 21c) vibrate simultaneously, realize double in the same time To sounding.When applied to portable terminal 100, loud speaker 210 of the invention passes through the first vibrational system 1 and the second vibrational system 2 It can be respectively to 100 positive and negative both direction sounding of portable terminal.
Further, the through-hole 32 is located on magnetic circuit system (3a, 3b, 3c, 3d).
In the present embodiment, through-hole 32 can be opened on the bottom wall of conductive magnetic yoke 33, corresponding connection magnetic gap 31 and second operatic tunes 5, or be opened in the side of center magnet steel (34a, 34b, 34c, 34d) and in center magnet steel (34a, 34b, 34c, 34d) downwards The bottom wall of conductive magnetic yoke 33 is penetrated through after bending, as an example, in the air-flow such as Fig. 3 in through-hole 32 shown in AF.
Further, the magnetic circuit system include conductive magnetic yoke 33 and center magnetic path portion in the conductive magnetic yoke 33 and Side magnetic circuit part (does not indicate);
The magnetic gap 31 for accommodating voice coil 12 is formed between the center magnetic path portion and side magnetic circuit part;
At least one of the center magnetic path portion and the side magnetic circuit part are equipped with permanent magnet;
Through-hole 32 includes the central through hole 321 of corresponding conductive magnetic yoke 33 and center magnetic path portion setting.
In the present embodiment, since the amplitude in 11 centre of the first vibrating diaphragm is usually maximum, by the way that central through hole 321 is right Larger amount of air-flow can be transmitted by answering the centre of the first vibrating diaphragm 11 to be arranged, and then preferably push second to shake using the air-flow Film (21a, 21b, 21c).
Further, Fig. 9 to Figure 12 is please referred to, the center magnetic path portion of magnetic circuit system (3a, 3b, 3c, 3d) includes being set to The center magnet steel (34a, 34b, 34c, 34d) of 33 bottom of conductive magnetic yoke, and at the top of center magnet steel (34a, 34b, 34c, 34d) Magnetic conductive board 35;
The first endoporus 331 is offered in conductive magnetic yoke 33, center magnet steel (34a, 34b, 34c, 34d) offers the second endoporus (341a, 341b, 341c, 341d), offers third endoporus 351 in conductive magnetic yoke 33, the first endoporus 331, the second endoporus (341a, 341b, 341c, 341d) and third endoporus 351 connection form central through hole 321.
In the present embodiment, central through hole 321 directly penetrates through conductive magnetic yoke 33, center magnet steel (34a, 34b, 34c, 34d) and Magnetic conductive board 35, form is simple, may advantageously facilitate the gas circulation between first operatic tunes 4 and second operatic tunes 5.
Further, the magnetic circuit system of second and third embodiment shown in Figure 10 and Figure 11, center magnet steel are please referred to (34b, 34c) includes the two sub- magnet steel (342b, 342c) mutually spliced, in the piece and second of two sub- magnet steel (342b, 342c) (341b, 341c) connects in hole.In the present embodiment, the second endoporus (341b, 341c) splices shape by two sub- magnet steel (342b, 342c) At the internal face of the second endoporus (341b, 341c) is actually converted into the peripheral surface of each sub- magnet steel (342b, 342c), i.e., sub- magnetic Open trough wall surface on steel (342b, 342c) peripheral surface, so can centered on magnet steel (34b, 34c) form the second endoporus (341b, 341c) is in terms of processing with convenience.
Preferably, for the ease of assemble and promoted two sub- magnet steel (342b, 342c) raw material interchangeability, two sub- magnet steel (342b, 342c) crossed about one the center second endoporus (341b, 341c) perpendicular is symmetrical or two sub- magnet steel (342b, 342c) Central symmetry about the second endoporus (341b, 341c).Specifically, assembly when center magnet steel (34b, 34c) when, can first by Blank before two sub- magnet steel (342b, 342c) are unmagnetized first splices, and then magnetizes again, the blank of two sub- magnet steel (342b, 342c) It can be interchanged, thus only need to provide a kind of blank of geomery.
Further, the fourth embodiment of magnetic circuit system shown in Figure 12 is please referred to, center magnet steel 34d is equipped with connection the The joint-cutting 342d of two endoporus 341d internal faces and center magnet steel 34d peripheral surfaces.In the present embodiment, it is suitable for using wire cutting Technique, which processes the second endoporus 341d, specifically can first process joint-cutting 342d, then process the second endoporus 341d, phase Than drilling the second endoporus 341d, more practicability.
Preferably, referring once again to Fig. 8 to Figure 12, the first vibrating diaphragm 11, the second vibrating diaphragm (21a, 21b, 21c) and center magnet steel (34a, 34b, 34c, 34d) is strip, the first vibrating diaphragm 11, the second vibrating diaphragm (21a, 21b, 21c) and center magnet steel (34a, 34b, 34c, 34d) long axis be located in same vertical plane, length of the central through hole 321 along center magnet steel (34a, 34b, 34c, 34d) Direction is spent to extend.
In the present embodiment, it is to be understood that vertical plane is the plane for being parallel to upper and lower directions, due to the first vibrating diaphragm 11, the second vibrating diaphragm (21a, 21b, 21c) and center magnet steel (34a, 34b, 34c, 34d) are strip, correspondingly loud speaker 210 Shape also be strip, compared to circle, this structure space availability ratio higher when applied to portable terminal 100.Meanwhile Under the premise of equal area, the first vibrating diaphragm 11 and the second vibrating diaphragm (21a, 21b, 21c) of strip are easier to obtain shaking for bigger Width actively can agitate a greater amount of air for the first vibrating diaphragm 11 to central through hole 321, and the second vibrating diaphragm (21a, 21b, The air-flow for 21c) being easier to be flowed through central through hole 321 pushes.
Further, the magnetic circuit system include conductive magnetic yoke 33 and center magnetic path portion in the conductive magnetic yoke 33 and Side magnetic circuit part (does not indicate);
The magnetic gap 31 for accommodating voice coil 12 is formed between the center magnetic path portion and side magnetic circuit part;
At least one of the center magnetic path portion and the side magnetic circuit part are equipped with permanent magnet;
Through-hole 32 further includes the side through-hole 322 that corresponding magnetic gap 31 is arranged in the conductive magnetic yoke 33, the side through-hole 322 Be provided with it is at least one, when the side through-hole 322 is provided with multiple, week of multiple side through-holes 322 along the magnetic gap 31 To arranged for interval;Alternatively, the through-hole 322 further includes the side through-hole 322 being arranged in the end of the conductive magnetic yoke 33.
In the present embodiment, side through-hole 322 can be provided separately within the end of conductive magnetic yoke 33, or be arranged in conductive magnetic yoke 33 The setting of magnetic gap 31 is gone up and corresponds to, in preferred embodiment, side through-hole 322 can be combined with central through hole 321 and be arranged together, The connectivity between first operatic tunes 4 and second operatic tunes 5 is then further increased, and then when the vibration of the first vibrating diaphragm 11, there can be list Position time interior energy has flowing of more air between first operatic tunes 4 and second operatic tunes 5, the second vibrating diaphragm (21a, 21b, 21c) Also it can be driven to a greater degree.
It is understood that side through-hole 322 be provided with it is at least one, in order to increase circulation area, side through-hole as much as possible 322 be provided with it is multiple, multiple side through-holes 322 along magnetic gap 31 circumferentially-spaced arrangement, in this way, can both ensure connection balance Property can make again magnetic circuit equilibrium be connected to.
Preferably, magnetic circuit system (3a, 3b, 3c, 3d) includes conductive magnetic yoke 33, is set to the center magnet steel of 33 bottom of conductive magnetic yoke (34a, 34b, 34c, 34d), and the magnetic conductive board 35 at the top of center magnet steel (34a, 34b, 34c, 34d);
The first endoporus 331 is offered in conductive magnetic yoke 33, center magnet steel (34a, 34b, 34c, 34d) offers the second endoporus (341a, 341b, 341c, 341d), offers third endoporus 351 in conductive magnetic yoke 33, the first endoporus 331, the second endoporus (341a, 341b, 341c, 341d) and third endoporus 351 connection form central through hole 321, side through-hole 322 is opened in the bottom of conductive magnetic yoke 33 Portion.Since 35 closest second operatic tunes of center magnet steel (34a, 34b, 34c, 34d) and magnetic conductive board is compared in the bottom of conductive magnetic yoke 33 5, thus side through-hole 322 be opened in conductive magnetic yoke 33 bottom processing it is also the most convenient.
Further, the first vibrating diaphragm 11, the second vibrating diaphragm (21a, 21b, 21c) and center magnet steel (34a, 34b, 34c, 34d) Be strip, the first vibrating diaphragm 11, the second vibrating diaphragm (21a, 21b, 21c) and center magnet steel (34a, 34b, 34c, 34d) long axis In same vertical plane, central through hole 321 extends along the length direction of center magnet steel (34a, 34b, 34c, 34d).
In the present embodiment, it is to be understood that vertical plane is the plane for being parallel to upper and lower directions, due to the first vibrating diaphragm 11, the second vibrating diaphragm (21a, 21b, 21c) and center magnet steel (34a, 34b, 34c, 34d) are strip, correspondingly loud speaker 210 Shape also be strip, compared to circle, this structure space availability ratio higher when applied to portable terminal 100.Meanwhile Under the premise of equal area, the first vibrating diaphragm 11 and the second vibrating diaphragm (21a, 21b, 21c) of strip are easier to obtain shaking for bigger Film can actively agitate a greater amount of air for the first vibrating diaphragm 11, and the second vibrating diaphragm (21a, 21b, 21c) is easier to be flowed It is pushed through the air-flow of central through hole 321 and side through-hole 322.
Further, the sound that the first vibrating diaphragm 11 is generated away from the side the second vibrating diaphragm (21a, 21b, 21c) is connect by human ear It receives, the sound that the second vibrating diaphragm (21a, 21b, 21c) is generated away from 11 side of the first vibrating diaphragm is received by human ear.In the present embodiment, First vibrating diaphragm 11 and the second vibrating diaphragm (21a, 21b, 21c) can generate the sense of hearing resonant range of sound positioned at people, for example, frequency model It is trapped among 20~20000HZ, in this way, user can directly receive acoustic information from the positive and negative both direction of loud speaker.It is appreciated that , in other embodiments, the first vibrating diaphragm 11 and the second vibrating diaphragm (21a, 21b, 21c) can also be used to generate other frequency ranges Sound, such as " sound password " that human auditory system respective range is, this sound can be decoded by machine, corresponding to realize Signal transmission.
Further, Fig. 4 and Fig. 5 is please referred to, the second vibrating diaphragm (21a, 21b) includes central part 211, surrounds central part 211 The ring portion (212a, 212b) of setting and the fixed part 213 being arranged around ring portion (212a, 212b);Central part 211 is flat Face laminated structure, ring portion (212a, 212b) is the structure being made of a protrusion or the ring portion is by least one The wavy shaped configuration that raised and at least one recess is constituted.
In the present embodiment, central part 211 is to the density variation for experiencing air in second operatic tunes 5 and vibration sounding therewith Sounding is passively radiated, by setting central part 211 to plane platelet structures, such second vibrating diaphragm (21a, 21b) is upper and lower The space occupied is smaller on direction, and can generate sufficiently large amplitude.And 211 centered on ring portion (212a, 212b) Movement provide certain pliable, that is, provide certain flexibility, central part 211 allowed to be easier to be flowed through central through hole 321 And the air-flow of side through-hole 322 pushes.
Further, Fig. 6 is please referred to, the second vibrating diaphragm 21c further includes the composite layer 214 for being incorporated into central part 211.Setting is multiple The quality of the second vibrating diaphragm 21c can be reduced by closing layer 214, ensure that the second vibrating diaphragm 21c is more easy to be pushed by air-flow.Preferably, in order to protect The material that the second vibrating diaphragm 21c vocal performances passively radiated are more excellent, and composite layer 214 uses specific modulus high is demonstrate,proved, for example, aluminium composite wood Matter, aluminium, almag, magnesium lithium alloy material, carbon fiber, PEN (polyethylene naphthalate), LCP (Liquid Crystal Polymer liquid crystal polymers), foaming body etc..
Further, through-hole 32 includes the centrally disposed central through hole 321 of corresponding first vibrating diaphragm 11, and composite layer 214 corresponds to Central through hole 321 is arranged, and the setting of 214 evagination of composite layer, its concave surface of the composite layer 214 of evagination is towards central through hole 321.
In the present embodiment, the concave surface of composite layer 214 so flows to second towards central through hole 321 from central through hole 321 5 airflow function of the operatic tunes " can be caught " when composite layer 214 by composite layer 214, and the thrust for acting on the second vibrating diaphragm 21c is able to The central part 211 of the second vibrating diaphragm 21c is more intensively acted on, and then vibration by a larger margin can be generated.
Further, since the second vibrating diaphragm (21a, 21b, 21c) is using passive radiation sounding, in order to ensure the second vibrating diaphragm (21a, 21b, 21c) is more easy to be pushed by air-flow, and the second vibrating diaphragm (21a, 21b, 21c) is using the relatively low material of elasticity modulus, example Such as, if the first vibrating diaphragm 11 and the second vibrating diaphragm (21a, 21b, 21c) include central part, around central part setting ring portion and Around the fixed part of ring portion setting, i.e. two vibrating diaphragms use consistent structure, then the second vibrating diaphragm (21a, 21b, 21c) central part Elasticity modulus is less than the elasticity modulus of the first vibrating diaphragm central part, and the elasticity modulus in the second vibrating diaphragm (21a, 21b, 21c) ring portion is low Elasticity modulus in 11 ring portion of the first vibrating diaphragm.
Further, first vibrating diaphragm 11 includes central part, around the ring portion of central part setting and around ring The central part of the fixed part of portion's setting, first vibrating diaphragm 11 is plane platelet structures.Similarly, by will be in the first vibrating diaphragm 11 Center portion is set as plane platelet structures, and the space occupied is smaller in the up-down direction for such first vibrating diaphragm 11, and can generate Sufficiently large amplitude.After combining the central part of the second vibrating diaphragm (21a, 21b, 21c) to be also configured as the embodiment of laminated structure, this The loudspeaker body that invention provides generally forms upper and lower directions compared with thin structure, so, it is easier to apply in flat-shaped installation space.
The present invention also proposes a kind of portable terminal 100, please refers to Figure 13 to Figure 15, which includes shell 110,110 inside of shell has accommodating cavity 120, and portable terminal 100 further includes loud speaker 210, the concrete structure of the loud speaker 210 At least have since this portable terminal 100 uses whole technical solutions of above-mentioned all embodiments with reference to above-described embodiment There are all advantageous effects caused by the technical solution of above-described embodiment, this is no longer going to repeat them.
Loud speaker 210 is mounted on accommodating cavity 120, and shell 110 offers the first acoustic aperture 130 of corresponding first vibrating diaphragm 11, with And the second acoustic aperture 140 of corresponding second vibrating diaphragm (21a, 21b, 21c).Preferably, in order to shorten the propagation of 110 internal sound of shell Acoustic resistance is reduced in path, and the first acoustic aperture 130 is opened in the position with 11 face of the first vibrating diaphragm of shell 110, and the second acoustic aperture 140 is opened Set on the position with the second vibrating diaphragm (21a, 21b, 21c) face of shell 110.
Further, there is the shell 110 front being oppositely arranged and reverse side, first acoustic aperture 130 to be set to described The front of shell 110, second acoustic aperture 140 are set to the reverse side of the shell 110;
First vibrating diaphragm 11 connects away from the space of second vibrating diaphragm (21a, 21b, 21c) and first acoustic aperture 130 Logical, first acoustic aperture 130 is for conducting the sound that first vibrating diaphragm 11 is sent out;
Second vibrating diaphragm (21a, 21b, 21c) connects away from the space of first vibrating diaphragm 11 and second acoustic aperture 140 Logical, second acoustic aperture 140 is for conducting the sound that second vibrating diaphragm (21a, 21b, 21c) sends out.In this way, loud speaker 210 It can be respectively to 100 positive and negative both direction sounding of portable terminal by the first vibrational system 1 and the second vibrational system 2.
The foregoing is merely the preferred embodiment of the present invention, are not intended to limit the scope of the invention, every at this Under the inventive concept of invention, using equivalent structure transformation made by description of the invention and accompanying drawing content, or directly/use indirectly In the scope of patent protection that other related technical areas are included in the present invention.

Claims (14)

1. a kind of loud speaker, which is characterized in that including:
First vibrational system, including the first vibrating diaphragm and the voice coil on the inside of first vibrating diaphragm;
Second vibrational system includes the second vibrating diaphragm being oppositely arranged with first vibrating diaphragm;And
Magnetic circuit system is set between first vibrating diaphragm and the second vibrating diaphragm, shape between the magnetic circuit system and first vibrating diaphragm At first operatic tunes, the voice coil is contained in the magnetic gap of the magnetic circuit system;The magnetic circuit system and second vibrating diaphragm it Between form second operatic tunes, between first operatic tunes and second operatic tunes be equipped with through-hole;
The voice coil drives the first diaphragm oscillations sounding, the air-flow that the first diaphragm oscillations sounding generates to pass through institute successively It states first operatic tunes, the through-hole, second operatic tunes and is transferred to second vibrating diaphragm, and then drive the second diaphragm oscillations hair Sound.
2. loud speaker as described in claim 1, which is characterized in that the through-hole is arranged on the magnetic circuit system.
3. loud speaker as claimed in claim 2, which is characterized in that
The magnetic circuit system includes conductive magnetic yoke and the center magnetic path portion in the conductive magnetic yoke and side magnetic circuit part;
The magnetic gap for accommodating the voice coil is formed between the center magnetic path portion and side magnetic circuit part;
At least one of the center magnetic path portion and the side magnetic circuit part are equipped with permanent magnet;
The through-hole includes the central through hole of the corresponding conductive magnetic yoke and center magnetic path portion setting.
4. loud speaker as claimed in claim 3, which is characterized in that
The center magnetic path portion includes the center magnet steel set on the conductive magnetic yoke bottom, and at the top of the center magnet steel Magnetic conductive board;The first endoporus is offered in the conductive magnetic yoke, the center magnet steel offers the second endoporus, opened in the conductive magnetic yoke Equipped with third endoporus, first endoporus, the second endoporus and the third endoporus are connected to form the central through hole.
5. loud speaker as claimed in claim 4, which is characterized in that the center magnet steel includes the two sub- magnet steel mutually spliced, and two The piece of the sub- magnet steel connects with second endoporus, wherein
The two sub- magnet steel are symmetrical about the perpendicular at second endoporus center excessively;Alternatively,
Central symmetry of the two sub- magnet steel about second endoporus.
6. loud speaker as claimed in claim 4, which is characterized in that the center magnet steel, which is equipped with, to be connected in second endoporus The joint-cutting of wall surface and the center magnet steel peripheral surface.
7. such as claim 2-6 any one of them loud speakers, which is characterized in that the magnetic circuit system includes conductive magnetic yoke and is set to Center magnetic path portion in the conductive magnetic yoke and side magnetic circuit part;
The magnetic gap for accommodating the voice coil is formed between the center magnetic path portion and side magnetic circuit part;
At least one of the center magnetic path portion and the side magnetic circuit part are equipped with permanent magnet;
The through-hole further includes the side through-hole that the corresponding magnetic gap is arranged in the conductive magnetic yoke, the side through-hole be provided with to It is one few, when the side through-hole is provided with multiple, circumferentially-spaced arrangement of multiple side through-holes along the magnetic gap;Alternatively,
The through-hole further includes the side through-hole being arranged in the end of the conductive magnetic yoke.
8. loud speaker as claimed in any one of claims 1 to 6, which is characterized in that first vibrating diaphragm deviates from second vibrating diaphragm The sound that side generates is received by human ear, and second vibrating diaphragm deviates from the sound of first vibrating diaphragm side generation by human ear institute State reception.
9. loud speaker as described in claim 1, which is characterized in that second vibrating diaphragm includes central part, set around central part The ring portion set and the fixed part being arranged around ring portion;The central part is plane platelet structures, and the ring portion serves as reasons The structure or the ring portion that one protrusion is constituted are by least one protrusion and at least one waveform knot constituted that is recessed Structure.
10. loud speaker as claimed in claim 9, which is characterized in that second vibrating diaphragm further includes being incorporated into the central part Composite layer.
11. loud speaker as claimed in claim 10, which is characterized in that the through-hole includes that corresponding first vibrating diaphragm center is set The central through hole set, the composite layer correspond to central through hole setting, the composite layer evagination setting, evagination it is described compound Its concave surface of layer is towards the central through hole.
12. such as claim 1-6 and 9-11 any one of them loud speaker, which is characterized in that during first vibrating diaphragm includes Center portion, the fixed part around the ring portion that central part is arranged and around the setting of ring portion, the central part of first vibrating diaphragm are Plane platelet structures.
13. a kind of portable terminal, including shell, the enclosure interior has accommodating cavity, which is characterized in that further includes that right such as is wanted Any one of 1-12 loud speakers, the loud speaker is asked to be mounted on the accommodating cavity, the shell offers corresponding described first First acoustic aperture of vibrating diaphragm, and correspond to the second acoustic aperture of second vibrating diaphragm.
14. portable terminal as claimed in claim 13, which is characterized in that the shell is with the front being oppositely arranged and instead Face, first acoustic aperture are set to the front of the shell, and second acoustic aperture is set to the reverse side of the shell;
First vibrating diaphragm is connected to away from the space of second vibrating diaphragm with first acoustic aperture, and first acoustic aperture is for conducting The sound that first vibrating diaphragm is sent out;
Second vibrating diaphragm is connected to away from the space of first vibrating diaphragm with second acoustic aperture, and second acoustic aperture is for conducting The sound that second vibrating diaphragm is sent out.
CN201810667411.4A 2018-06-25 2018-06-25 Loud speaker and portable terminal Pending CN108513228A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
CN201810667411.4A CN108513228A (en) 2018-06-25 2018-06-25 Loud speaker and portable terminal
PCT/CN2019/089448 WO2020001229A1 (en) 2018-06-25 2019-05-31 Loudspeaker and portable terminal

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CN108513228A true CN108513228A (en) 2018-09-07

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WO (1) WO2020001229A1 (en)

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