CN109348373B - Sound production device - Google Patents

Sound production device Download PDF

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Publication number
CN109348373B
CN109348373B CN201811162980.XA CN201811162980A CN109348373B CN 109348373 B CN109348373 B CN 109348373B CN 201811162980 A CN201811162980 A CN 201811162980A CN 109348373 B CN109348373 B CN 109348373B
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China
Prior art keywords
voice coil
magnetic
fixed
elastic
framework
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CN201811162980.XA
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CN109348373A (en
Inventor
宋威
张帆
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AAC Technologies Pte Ltd
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AAC Technologies Pte Ltd
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Priority to CN201811162980.XA priority Critical patent/CN109348373B/en
Publication of CN109348373A publication Critical patent/CN109348373A/en
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    • 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
    • H04R9/025Magnetic circuit
    • 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

Abstract

The invention provides a sounding device, which comprises a basin frame, a vibration system, a magnetic circuit system with magnetic gaps and four mutually-spaced supporting frameworks, wherein the basin frame is provided with a plurality of support frames; the vibration system comprises a vibrating diaphragm, a voice coil and elastic supporting components, wherein the voice coil is inserted into the magnetic gap, the elastic supporting components are fixed on the basin frame and are opposite to the vibrating diaphragm and arranged at intervals, the voice coil is of a rectangular structure with round corners, and the four supporting frameworks are respectively positioned at the positions of the four round corners of the voice coil; each one end of support chassis is fixed in the elastic support subassembly, its other end is fixed in keeping away from of voice coil loudspeaker voice coil the one end of vibrating diaphragm is used for with voice coil loudspeaker voice coil elasticity hang in the vibrating diaphragm below. Compared with the related art, the sound production device has excellent acoustic performance and better hearing.

Description

Sound production device
[ technical field ] A method for producing a semiconductor device
The invention relates to the field of electroacoustic conversion, in particular to a sounding device applied to a portable electronic product.
[ background of the invention ]
With the advent of the mobile internet age, the number of smart mobile devices is increasing. Among the mobile devices, the mobile phone is undoubtedly the most common and portable mobile terminal device. At present, the functions of mobile phones are very diverse, one of them is a high-quality music function, and therefore, a sound generating device for playing sound is widely applied to the current smart mobile devices.
The sound production device in the related art comprises a basin frame, a vibration system fixed on the basin frame and a magnetic circuit system for driving the vibration system to vibrate and produce sound, wherein the vibration system comprises a vibrating diaphragm fixed on the basin frame, a voice coil for driving the vibrating diaphragm to vibrate and an elastic support assembly; the magnetic circuit system comprises a magnetic yoke fixed on the basin stand and magnetic steel fixed on the magnetic yoke, and the magnetic steel comprises main magnetic steel and auxiliary magnetic steel which is arranged around the main magnetic steel and forms magnetic gaps at intervals; the voice coil is inserted and suspended in the magnetic gap, one end of the voice coil is fixedly attached to the vibrating diaphragm, and the other end of the voice coil is fixed to the elastic supporting component.
However, in the sound device in the related art, the diaphragm and the elastic support component are respectively fixed at two opposite ends of the voice coil, although the elastic support component can effectively prevent the voice coil from swinging transversely when vibrating, the design of the voice coil is limited due to the structure directly connected with the voice coil, and under the condition that the height of the voice coil is determined, in order to ensure the vertical vibration space, the total height of the sound device cannot be thinner and lighter, and in addition, the volume of the magnetic circuit system is also limited, the elastic support component is arranged between the voice coil and the magnetic circuit system, so that the magnetic gap is also affected, the magnetic circuit cannot be maximized, and the acoustic performance of the sound device cannot be optimized.
Therefore, there is a need to provide a new sound generation device to solve the above technical problems.
[ summary of the invention ]
The invention aims to provide a sounding device with excellent acoustic performance and good hearing.
In order to achieve the above object, the present invention provides a sound production device, which comprises a basin frame, a vibration system and a magnetic circuit system with magnetic gaps, wherein the vibration system and the magnetic circuit system are respectively fixed on the basin frame, and four support frameworks which are mutually spaced; the vibration system comprises a vibrating diaphragm fixed on the basin frame, a voice coil fixed on the vibrating diaphragm and inserted in the magnetic gap to drive the vibrating diaphragm to vibrate and produce sound, and an elastic support assembly fixed on the basin frame, opposite to the vibrating diaphragm and arranged at intervals, wherein the voice coil is in a rectangular structure with round corners, and the four support frameworks are respectively positioned at the positions of the four round corners of the voice coil; each one end of support chassis is fixed in the elastic support subassembly, its other end is fixed in keeping away from of voice coil loudspeaker voice coil the one end of vibrating diaphragm is used for with voice coil loudspeaker voice coil elasticity hang in the vibrating diaphragm below.
Preferably, the elastic support component encloses to form a hollow area, and one end of the voice coil, which is far away from the diaphragm, is located in the range of the hollow area.
Preferably, two adjacent support frameworks are mutually spaced and jointly enclose an accommodating space.
Preferably, the two elastic support assemblies are provided, one elastic support assembly is respectively arranged on two opposite sides of the voice coil, and the elastic support assemblies and the voice coil are arranged at intervals; each elastic support component is connected with the voice coil through two support skeletons respectively.
Preferably, the support framework comprises a framework body arranged at an interval with the voice coil, a framework extension wall bent and extended from the framework body to a direction far away from or close to the vibrating diaphragm, and a framework connecting part extended from one end of the framework extension wall far away from the framework body to a direction close to the voice coil; the skeleton body with the elastic support subassembly is connected, skeleton connecting portion with the voice coil loudspeaker voice coil is connected.
Preferably, the elastic support component comprises an elastic part and an auxiliary vibrating diaphragm attached to the elastic part, and the auxiliary vibrating diaphragm is fixedly connected with the support framework.
Preferably, the elastic part comprises a first fixing arm fixed on the basin frame, a second fixing arm supported and fixed on the supporting framework, and an elastic arm extending from the first fixing arm to the second fixing arm and forming connection; the auxiliary vibrating diaphragm comprises a folding ring with an arc-shaped cross section, a first connecting part extending outwards from the folding ring and a second connecting part extending inwards from the folding ring, the first connecting part is fixed on the first fixing arm, and the second connecting part and one side of the second fixing arm, which is far away from the vibrating diaphragm, are fixed, so that the folding ring and the elastic arm are oppositely arranged; the framework body is fixed on one side, far away from the second fixing arm, of the second connecting part.
Preferably, the second fixing arm is located on the voice coil along an orthographic projection perpendicular to the vibration direction of the diaphragm.
Preferably, the elastic part is a flexible circuit board.
Preferably, the magnetic circuit system comprises a magnetic yoke, main magnetic steel fixed on the magnetic yoke, and first auxiliary magnetic steels respectively arranged on two opposite sides of the main magnetic steel at intervals and forming the magnetic gap with the main magnetic steel, wherein each first auxiliary magnetic steel is located between two adjacent elastic support assemblies.
Preferably, the two first auxiliary magnetic steels are located on two sides of the long axis of the voice coil, and the two elastic supporting assemblies are located on two sides of the short axis of the voice coil.
Preferably, the magnetic circuit system further comprises second secondary magnetic steels respectively arranged at intervals on the other two opposite sides of the main magnetic steel.
More preferably, two first pair of magnet steel is located the major axis both sides of voice coil loudspeaker voice coil, two the vice magnet steel of second is located the minor axis both sides of voice coil loudspeaker voice coil, and each the vice magnet steel of second is located same two of elastic support subassembly between the second fixed arm.
Preferably, the vice magnet steel of second includes the magnet steel body and by the magnet steel body is close to the magnet steel rib that the both ends of voice coil loudspeaker voice coil one side extended the formation respectively, the support chassis corresponds the position of magnet steel rib is equipped with the portion of stepping down the magnet steel rib.
More preferably, the auxiliary diaphragm is provided with a yielding groove formed by the fact that one side of the auxiliary diaphragm is close to the voice coil is close to the basin frame in a sunken mode, and the magnetic steel body extends to the inside of the yielding groove.
Preferably, the magnetic circuit system further comprises an upper clamping plate, the upper clamping plate comprises a fixing ring fixed on the basin frame, the fixing ring is annular, and a pole core extended by the first auxiliary magnetic steel and the second auxiliary magnetic steel is respectively arranged on the first auxiliary magnetic steel and the second auxiliary magnetic steel, and the pole core is respectively matched with the corresponding first auxiliary magnetic steel or the shape of the second auxiliary magnetic steel.
Compared with the prior art, in the sound production device, the voice coil is connected with the vibrating diaphragm, and meanwhile, four support skeletons which are mutually spaced are arranged, and the four support skeletons are respectively positioned at four round corners of the voice coil; and one end of the supporting framework is fixed on the elastic supporting component, and the other end of the supporting framework is fixed at one end, far away from the vibrating diaphragm, of the voice coil, and is used for elastically suspending the voice coil below the vibrating diaphragm. The structure enables the elastic support component to be connected with one end of the voice coil, which is selected from the diaphragm, through the support framework, so that on one hand, the transverse swing of the voice coil during vibration is inhibited, and the stability of the voice coil is improved; on the other hand, the limitation of the elastic support component on the voice coil when the elastic support component is directly connected with the voice coil is eliminated, the height of the voice coil is not limited by the elastic support component any more, and the overall height of the sound production device can be designed to be thinner and lighter; the support framework is arranged at the position of a round corner of the voice coil, so that more magnetic steels are accommodated, the limitation on the design of a magnetic circuit system is eliminated, the elastic support component is not directly glued with the bottom of the voice coil, the magnetic circuit system does not need to be replaced, the magnetic circuit system can realize a maximized multi-magnetic steel three-magnetic circuit or five-magnetic circuit structure, and the acoustic performance of the sounding device is effectively improved.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without inventive efforts, wherein:
FIG. 1 is a schematic perspective view of a sound device according to the present invention;
FIG. 2 is an exploded perspective view of a sound device according to the present invention;
FIG. 3 is an enlarged partial view of the portion indicated by B in FIG. 3;
FIG. 4 is a cross-sectional view taken along line A-A of FIG. 1;
FIG. 5 is an enlarged partial view of the portion indicated by C in FIG. 4;
FIG. 6 is a top view of a portion of the sound device of the present invention;
FIG. 7 is a schematic perspective view of a support frame of the sound device of the present invention;
FIG. 8 is an exploded perspective view of the magnetic circuit system of the sound device of the present invention;
FIG. 9 is a schematic perspective view of an elastic support assembly of the sound device of the present invention;
FIG. 10 is an exploded perspective view of the resilient support assembly of the sound device of the present invention;
fig. 11 is a schematic view of the assembly of the elastic support component and the second auxiliary magnetic steel of the sound production device of the present invention.
[ detailed description ] embodiments
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-11, the present invention provides a sound generating device 100, which includes a frame 1, a vibration system 2, a magnetic circuit system 3 and a supporting frame 4. The magnetic circuit system 3 drives the vibration system 2 to vibrate and generate sound, and the magnetic circuit system 3 is provided with a magnetic gap 30.
The basin frame 1 is used for fixing the vibration system 2, the magnetic circuit system 3 and the support framework 4.
The vibration system 2 is fixed on the basin frame 1. In the present embodiment, the vibration system 2 includes a diaphragm 21, a voice coil 22, and an elastic support member 23.
The vibrating diaphragm 21 is fixed on the basin stand 1.
The voice coil 22 is fixed to the diaphragm 21. The voice coil 22 is inserted in the magnetic gap 30 to drive the diaphragm 21 to vibrate and generate sound.
The elastic supporting component 23 is fixed on the basin stand 1. The elastic supporting component 23 is opposite to the diaphragm 21 and is arranged at an interval. In this embodiment, the number of the elastic supporting components 23 is two, one elastic supporting component 23 is disposed on each of two opposite sides of the voice coil 22, and the elastic supporting components 23 and the voice coil 22 are disposed at intervals; each of the elastic supporting components 23 is connected with the voice coil 22 through two of the supporting skeletons 4. That is, the two elastic supporting members 23 are respectively located at two opposite sides of the voice coil 22 and spaced apart from the voice coil 22. Two elastic support assembly 23's setting forms symmetrical structure, and is more stable to voice coil 22's support effect, the effect of preventing voice coil 22 lateral swing is more excellent. The elastic supporting component 23 encloses to form a hollow area 10, and one end of the voice coil 22 away from the diaphragm 21 is located in the hollow area 10 and forms a suspension, so that the voice coil 22 can float up and down without design limitation.
Each elastic support component 23 supports the voice coil 22 on the basin frame 1 through two support skeletons 4, on one hand, the elastic support components are used for enhancing the vibration effect of the diaphragm 21 and improving the acoustic performance of the sound generating device 100, and on the other hand, the elastic support components are used for balancing the swing of the vibration system 2 and improving the stability of the sound generating device 100.
Specifically, the elastic support assembly 23 includes an elastic member 231 and an auxiliary diaphragm 232 attached to the elastic member 231.
The elastic member 231 includes a first fixing arm 2311 fixed to the frame 1, a second fixing arm 2312 supported and fixed to the support frame 4, and two elastic arms 2313 extending from the first fixing arm 2311 to the second fixing arm 2312 and forming a connection. In this embodiment, the first fixing arm 2311 is provided with one elastic arm 2313 and one second fixing arm 2312 on both sides, that is, on one side of the short axis of the voice coil 22, two oppositely arranged second fixing arms 2312 are connected with the two elastic arms 2313, and the two elastic arms 2313 are connected with one first fixing arm 2311.
The auxiliary diaphragm 232 is fixedly connected with the support framework 4. The auxiliary diaphragm 232 includes a corrugated rim 2321 with an arc-shaped cross section, a first connection portion 2322 extending outward from the corrugated rim 2321, a second connection portion 2323 extending inward from the corrugated rim 2321, and a yielding groove 2324. The first connecting portion 2322 is fixed to the first fixing arm 2311, and the second connecting portion 2323 and one side of the second fixing arm 2312 away from the diaphragm 21 are fixed, so that the folding ring 2321 is disposed opposite to the elastic arm 2313. The auxiliary diaphragm 232 is made of a polymer material, for example, at least one of silica gel, rubber, PEEK, PEL, TPU, and other polymer materials. Of course, the material of which the auxiliary diaphragm 232 is made is not limited thereto.
Preferably, an orthographic projection of the second fixing arm 2312 along a direction perpendicular to the vibration direction of the diaphragm 21 and toward the voice coil 22 falls on the voice coil 22. That is, the position where the elastic support component 23 is attached to the support frame 4 is closer to the diaphragm 21 than the position where the voice coil 22 is attached to the support frame 4. This configuration facilitates the height of the voice coil 22 not being limited by the elastic support member 23, and the height of the sound device 100 can be designed to be more slim.
In this embodiment, the elastic member 231 is a flexible printed circuit board. The elastic member 231 is electrically connected to the voice coil 22. On one hand, the vibration system is used for improving the vibration strength and balance of the vibration system 2 and inhibiting swinging, and on the other hand, the voice coil 22 is led out to be connected with an external power supply, so that the risk that the lead of the voice coil is easy to break when the lead structure of the voice coil is led out of the power supply is avoided.
The receding groove 2324 is formed by the side of the auxiliary diaphragm 232 close to the voice coil 22 being recessed towards the direction close to the basin frame 1. The abdicating groove 2324 is used for matching with the design of the magnetic circuit system to increase the area of the magnetic steel.
The magnetic circuit system 3 is fixed on the basin stand 1. In the present embodiment, the magnetic circuit system 3 includes a yoke 31, a main magnet 32 fixed to the yoke 31, and first sub-magnets 33 respectively disposed on opposite sides of the main magnet 32 with an interval therebetween and forming the magnetic gap 30 with the main magnet 32. Each first secondary magnetic steel 33 is located between two adjacent elastic support assemblies 23.
For example, the voice coil 22 is a rectangular structure with rounded corners, the first secondary magnetic steel 33 includes two secondary magnetic steels, and the two secondary magnetic steels 33 are located on two sides of the long axis of the voice coil 22. Two of the elastic support members 23 are located on both sides of the short axis of the voice coil 2. At this time, the magnetic circuit system 3 forms a magnetic circuit structure of three magnetic steels. The driving performance of the magnetic circuit is stronger than that of a single magnetic steel magnetic circuit structure.
It should be noted that, it is also possible that the two first secondary magnetic steels 33 are respectively located at the same positions as the two elastic support assemblies 23, and are both located at both sides of the short axis of the voice coil 22.
In order to further effectively utilize the space and enhance the volume of the magnetic circuit system 3, in the present embodiment, the magnetic circuit system 3 further includes second secondary magnetic steels 34 respectively disposed at two opposite sides of the main magnetic steel 32 at intervals. That is, the two first sub-magnetic steels 33 and the two second sub-magnetic steels 34 are respectively located on both sides of the long axis and both sides of the short axis of the voice coil 22, or respectively located on both sides of the short axis and both sides of the long axis of the voice coil 22, thereby forming a five-magnetic-steel magnetic circuit structure.
In this embodiment, when the magnetic circuit structure is a five-magnetic-steel magnetic circuit structure, the voice coil 22 is a short structure with a rounded corner, two first secondary magnetic steels 33 are respectively located on two sides of the long axis of the voice coil 22, two second secondary magnetic steels 34 are located on two sides of the short axis of the voice coil 22, two elastic supporting assemblies 23 are respectively located on two sides of the short axis of the voice coil 22, and each second secondary magnetic steel 34 is located on the same side of the second secondary magnetic steel between the elastic supporting assembly 23 and the voice coil 22, specifically located on the same side of the second secondary magnetic steel between the two fixing arms 2312 of the elastic supporting assembly 23, and two adjacent supporting frames 4 are mutually spaced and jointly enclose an accommodating space 40. At this time, the magnetic circuit system 3 forms a magnetic circuit structure of five magnetic steels, and the driving performance is stronger, so that the vibration effect of the sound generating device 100 is better.
It should be noted that, the second auxiliary magnetic steel 34 needs to avoid the interference with the elastic supporting component 23 and the supporting frame 4 in order to make the best of the space, in this embodiment, the second auxiliary magnetic steel 34 includes a magnetic steel body 341 and a magnetic steel reinforcing portion 342 formed by extending two ends of the magnetic steel body 341 close to the voice coil 22 side, respectively, and the position of the supporting frame 4 corresponding to the magnetic steel reinforcing portion 342 is provided with a yielding portion 44 for yielding the magnetic steel reinforcing portion 342. Each of the magnetic steel reinforcements 342 extends to a position between the yielding portion 44 of one of the supporting frames 4 and the voice coil 22. The magnetic steel body 341 extends into the receding groove 2324, the area of the magnetic steel is enlarged, and the acoustic index of the sound production device 100 is improved, so that the acoustic performance of the sound production device 100 is better.
Of course, when the magnetic circuit system 3 is a three-magnet steel magnetic circuit structure, the two secondary magnets included therein may also be the structures of two second secondary magnets 34 in the five-magnet steel magnetic circuit structure.
In order to further improve the performance of the magnetic circuit system 3, the magnetic lines of force of the magnetic circuit system 3 are cut by the voice coil 22 as much as possible to form a larger driving force, the magnetic circuit system 3 further includes an upper clamp plate 35, when the magnetic circuit system 3 is a five-magnet magnetic circuit structure, the upper clamp plate 35 includes a fixing ring 351 fixed to the frame 1 and having a ring shape, and pole cores 352 respectively extending from the fixing ring 351 to the first and second sub-magnets 33 and 34, each of the first and second sub-magnets 33 and 34 is provided with a pole core 352, and the pole cores 352 are respectively matched with the corresponding shape of the first or second sub-magnet 33 or 34. When the magnetic circuit system 3 is a three-magnetic steel magnetic circuit structure, there are two pole cores 352.
The support frameworks 4 are four and are arranged at intervals. The four support skeletons 4 are respectively positioned at the positions of four round corners of the voice coil 22; one end of each of the supporting skeletons 4 is fixed to the elastic supporting component 23, and the other end thereof is fixed to one end of the voice coil 22 far away from the diaphragm 21, so as to elastically suspend the voice coil 22 below the diaphragm 21. This structure allows the elastic support member 23 to be indirectly connected to the voice coil 22 through the support bobbin 4 instead of being directly connected thereto. On one hand, the indirect connection structure realizes effective inhibition on the transverse swing of the voice coil 22 through the elastic support component 23, and improves the reliability and stability of the sound production device 100, on the other hand, the elastic support component 23 is not directly connected with the voice coil 22, so that the structural design of the voice coil 22 is released, the position of the structure can float up and down along the vibration direction of the vibrating diaphragm 21, the height of the voice coil is not limited by the elastic support component 23 any more, and the overall height of the sound production device can be designed to be thinner and lighter; meanwhile, the structural design of the magnetic circuit system 3 is released, the elastic support assembly 23 is not directly glued with the bottom of the voice coil 22, the interference of the magnetic circuit system 3 and the elastic support assembly 23 is effectively avoided, the magnetic circuit system 3 does not need to be shifted to the elastic support assembly 23, the magnetic circuit system can realize a maximized structure, and the acoustic performance of the sound production device is effectively improved.
Specifically, the support frame 4 includes a frame body 41 spaced apart from the voice coil 22, a frame extension wall 42 extending from the frame body 41 away from the diaphragm 21 or close to the direction of the diaphragm 21, and a frame connection portion 43 extending from the frame extension wall 42 away from the frame body 41 toward the voice coil 22. The skeleton body 41, the skeleton extension wall 42 and the skeleton connecting portion 43 form a stepped structure, which better avoids the interference between the elastic supporting component 23 and the magnetic circuit system 3, and releases a larger space for designing the magnetic circuit system 3. The bobbin body 41 is connected to the elastic support member 23, and the bobbin connecting portion 43 is connected to the voice coil 22. The frame body 41 is fixed to a side of the second connecting portion 2323 away from the second fixing arm 2312. Therefore, the voice coil 23 is connected to the frame 1, on one hand, the vibration efficiency of the auxiliary diaphragm 232 is enhanced, the acoustic performance is improved, on the other hand, the transverse rigidity of the vibration system 2 is enhanced, and the vibration swing, particularly the transverse swing, of the vibration system 2 is effectively balanced, so that the reliability of the sound production device 100 is improved.
In the present embodiment, the voice coil 22 is illustrated as a rectangular structure with rounded corners, and the two elastic support members 23 are respectively located on both sides of the short axis of the voice coil 22. The two bobbin connecting portions 42 of the same support bobbin 4 are respectively fixed at two adjacent round corners of the voice coil 22. Two adjacent support skeletons 4 are spaced from each other and jointly enclose a containing space 40, wherein the adjacent support skeletons 4 comprise two adjacent minor axes of the voice coil 22 or two adjacent major axes of the voice coil 22; the accommodating space 40 is used for accommodating the first secondary magnetic steel 33 or the second secondary magnetic steel 34. At this time, both sides of the long axis of the voice coil 22 can be used to design a magnetic steel structure, so as to increase the volume of the magnetic circuit system 3 to improve the magnetic field performance thereof.
Compared with the prior art, in the sound production device, the voice coil is connected with the vibrating diaphragm, and meanwhile, four support skeletons which are mutually spaced are arranged, and the four support skeletons are respectively positioned at four round corners of the voice coil; and one end of the supporting framework is fixed on the elastic supporting component, and the other end of the supporting framework is fixed at one end, far away from the vibrating diaphragm, of the voice coil, and is used for elastically suspending the voice coil below the vibrating diaphragm. The structure enables the elastic support component to be connected with one end of the voice coil, which is selected from the diaphragm, through the support framework, so that on one hand, the transverse swing of the voice coil during vibration is inhibited, and the stability of the voice coil is improved; on the other hand, the limitation of the elastic support component on the voice coil when the elastic support component is directly connected with the voice coil is eliminated, the height of the voice coil is not limited by the elastic support component any more, and the overall height of the sound production device can be designed to be thinner and lighter; the support framework is arranged at the position of a round corner of the voice coil, so that more magnetic steels are accommodated, the limitation on the design of a magnetic circuit system is eliminated, the elastic support component is not directly glued with the bottom of the voice coil, the magnetic circuit system does not need to be replaced, the magnetic circuit system can realize a maximized multi-magnetic steel three-magnetic circuit or five-magnetic circuit structure, and the acoustic performance of the sounding device is effectively improved.
While the foregoing is directed to embodiments of the present invention, it will be understood by those skilled in the art that various changes may be made without departing from the spirit and scope of the invention.

Claims (11)

1. A sounding device comprises a basin frame, a vibration system and a magnetic circuit system, wherein the vibration system and the magnetic circuit system are respectively fixed on the basin frame; the vibration system comprises a vibrating diaphragm fixed on the basin frame, a voice coil fixed on the vibrating diaphragm and inserted in the magnetic gap to drive the vibrating diaphragm to vibrate and produce sound, and an elastic support assembly fixed on the basin frame, opposite to the vibrating diaphragm and arranged at intervals, wherein the voice coil is in a rectangular structure with round corners; one end of each support framework is fixed to the elastic support assembly, and the other end of each support framework is fixed to one end, far away from the vibrating diaphragm, of the voice coil so as to elastically hang the voice coil below the vibrating diaphragm; the two elastic support assemblies are arranged on two opposite sides of the voice coil respectively, and the elastic support assemblies and the voice coil are arranged at intervals; each elastic support assembly is connected with the voice coil through two support skeletons respectively; the support framework comprises a framework body arranged at an interval with the voice coil, a framework extension wall bent and extended from the framework body to the direction far away from or close to the vibrating diaphragm, and a framework connecting part extended from one end, far away from the framework body, of the framework extension wall to the direction close to the voice coil; the magnetic circuit system comprises a magnetic yoke, main magnetic steel fixed on the magnetic yoke and first auxiliary magnetic steel which is arranged on two opposite sides of the main magnetic steel at intervals and forms a magnetic gap with the main magnetic steel, the first auxiliary magnetic steel comprises two pieces, each first auxiliary magnetic steel is positioned between two adjacent elastic support assemblies, the two first auxiliary magnetic steels are respectively positioned on two sides of a short shaft of the voice coil, and the two elastic support assemblies are respectively positioned on two sides of the short shaft of the voice coil.
2. The sounding device according to claim 1, wherein the resilient support member is configured to define a hollow region, and an end of the voice coil remote from the diaphragm is located within the hollow region.
3. The sound production device as claimed in claim 1, wherein two adjacent support frames are spaced from each other and together enclose a receiving space.
4. The sounding device according to claim 1, wherein the elastic support assembly comprises an elastic member and an auxiliary diaphragm attached to the elastic member, and the auxiliary diaphragm is fixedly connected to the support framework.
5. The sounder device according to claim 4, wherein the resilient member comprises a first fixed arm fixed to the frame, a second fixed arm supported and fixed to the support frame, and a resilient arm extending from the first fixed arm to the second fixed arm and forming a connection; the auxiliary vibrating diaphragm comprises a folding ring with an arc-shaped cross section, a first connecting part extending outwards from the folding ring and a second connecting part extending inwards from the folding ring, the first connecting part is fixed on the first fixing arm, and the second connecting part and one side of the second fixing arm, which is far away from the vibrating diaphragm, are fixed, so that the folding ring and the elastic arm are oppositely arranged; the framework body is fixed on one side, far away from the second fixing arm, of the second connecting part.
6. The sounding device according to claim 5, wherein the second fixing arm falls on the voice coil in an orthographic projection perpendicular to the vibration direction of the diaphragm toward the voice coil.
7. The sounder device according to claim 5, wherein the resilient member is a flexible circuit board.
8. The sound production device as claimed in claim 4, wherein the magnetic circuit system further comprises a second secondary magnetic steel disposed at intervals on the other opposite sides of the primary magnetic steel.
9. The sounding device according to claim 8, wherein the second set of secondary magnetic steels includes a magnetic steel body and magnetic steel reinforcements respectively extending from two ends of the magnetic steel body near one side of the voice coil, and the support frame is provided with a yielding portion corresponding to the magnetic steel reinforcements.
10. The sounding device according to claim 9, wherein the auxiliary diaphragm is provided with a recess formed by a side of the auxiliary diaphragm close to the voice coil being recessed towards the basin frame, and the magnetic steel body extends into the recess.
11. The sounder device according to claim 8, wherein the magnetic circuit system further comprises a top plate, the top plate comprises a ring-shaped fixing ring fixed to the frame and pole cores extending from the fixing ring to the first and second secondary magnetic steels, the first and second secondary magnetic steels each have a pole core thereon, and the pole cores respectively match with the corresponding first or second secondary magnetic steels.
CN201811162980.XA 2018-09-30 2018-09-30 Sound production device Active CN109348373B (en)

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Application Number Priority Date Filing Date Title
CN201811162980.XA CN109348373B (en) 2018-09-30 2018-09-30 Sound production device

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Application Number Priority Date Filing Date Title
CN201811162980.XA CN109348373B (en) 2018-09-30 2018-09-30 Sound production device

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CN109348373A CN109348373A (en) 2019-02-15
CN109348373B true CN109348373B (en) 2021-06-15

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