CN111405431B - Sound production device and loudspeaker box thereof - Google Patents

Sound production device and loudspeaker box thereof Download PDF

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Publication number
CN111405431B
CN111405431B CN201911382552.2A CN201911382552A CN111405431B CN 111405431 B CN111405431 B CN 111405431B CN 201911382552 A CN201911382552 A CN 201911382552A CN 111405431 B CN111405431 B CN 111405431B
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arm
fixed
voice coil
vibration
magnetic
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CN111405431A (en
Inventor
宋威
张帆
金鑫
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AAC Technologies Pte Ltd
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AAC Technologies Pte Ltd
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    • 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

Abstract

The invention provides a sounding device, which comprises a basin frame, a vibration system supported on the basin frame and a magnetic circuit system for driving the vibration system to vibrate and sound, wherein the magnetic circuit system is provided with a magnetic gap; the vibration system comprises a vibration diaphragm, an elastic conductive piece, a framework and a voice coil; the elastic conductive piece comprises a first fixed arm connected to the basin frame, a second fixed arm separated from the first fixed arm, a first elastic arm connected with the first fixed arm and the second fixed arm, and a welding pad extended by the second fixed arm; the framework comprises a framework body which is supported on the second fixing arm and connected to the vibrating diaphragm and an extension wall which is bent and extended from the framework body, and the extension wall part extends into the magnetic gap; the voice coil is including being fixed in the voice coil body that extends the wall and insert and locate in the magnetic gap and the voice coil lead wire that extends and be connected with the pad electricity by the direction bending of voice coil body to the pad, and the voice coil lead wire laminating extends to the pad in extending the wall and along extending the wall. Compared with the related art, the sound production device and the loudspeaker box have high reliability.

Description

Sound production device and loudspeaker box thereof
[ technical field ] A method for producing a semiconductor device
The invention relates to the field of acoustoelectrics, in particular to a sound production device applied to a portable electronic product and a loudspeaker box thereof.
[ 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 and a magnetic circuit system, wherein the vibration system is respectively supported on the basin frame, and the magnetic circuit system drives the vibration system to vibrate and produce sound; the vibration system comprises a vibrating diaphragm, a voice coil and an elastic conductive piece, wherein the voice coil is inserted into the magnetic gap and used for driving the vibrating diaphragm to vibrate and sound, and the elastic conductive piece is connected to one side, far away from the vibrating diaphragm, of the voice coil; the elastic conductive piece is a flexible circuit board, and the voice coil is electrically connected with the elastic conductive piece through a voice coil lead wire extending outwards.
However, in the related art, the voice coil lead is often suspended inside the sound generating device, and during the vibration process, the voice coil lead is easily damaged or falls off from the elastic conductive member, so that the voice coil cannot be normally energized to work, and the vibration sound generation reliability of the sound generating device and the speaker box is low.
Therefore, there is a need to provide a new sound generation device and a speaker box thereof to solve the above-mentioned technical problems.
[ summary of the invention ]
The invention aims to provide a sound production device with high reliability and a loudspeaker box thereof.
In order to achieve the above object, the present invention provides a sound production device, which comprises a frame, a vibration system respectively supported on the frame, and a magnetic circuit system for driving the vibration system to vibrate and produce sound, wherein the magnetic circuit system has a magnetic gap; the vibration system comprises a vibrating diaphragm and a voice coil inserted in the magnetic gap to drive the vibrating diaphragm to vibrate and sound; the vibration system further includes:
the elastic conductive piece comprises a first fixed arm connected to the basin frame, a second fixed arm arranged at an interval with the first fixed arm, a first elastic arm connected with the first fixed arm and the second fixed arm, and two welding pads extending from two opposite ends of the second fixed arm in a protruding manner; and the number of the first and second groups,
the framework comprises a framework body and an extension wall, the framework body is supported on one side, close to the vibrating diaphragm, of the second fixing arm and connected to the vibrating diaphragm, the extension wall is bent and extended from the framework body to the direction close to the magnetic circuit system, and the extension wall extends into the magnetic gap;
the voice coil is fixed in including supporting the voice coil body that is fixed in extend the wall and insert and locate in the magnetic gap and by the voice coil body to the direction of pad is buckled and is extended and with the voice coil lead wire that the pad electricity is connected, the laminating of voice coil lead wire is fixed in extend the wall and extend to along extend the wall the pad.
Preferably, the second fixing arm comprises a first arm connected to the first elastic arm and two ends of the first arm are respectively connected to the two bonding pads, a second arm located on one side of the first arm far away from the first fixing arm and arranged at an interval with the first arm, and a second elastic arm connected to the second arm and the first arm; the framework body is fixed in the first arm, extend the wall by the framework body is close to the one end bending type of pad extends and forms.
Preferably, the elastic conductive pieces are arranged at intervals, the framework comprises two elastic conductive pieces which are respectively connected with the two elastic conductive pieces, and the framework body of each framework is bent and extended to form two extending walls respectively at two opposite ends close to the magnetic circuit system; the voice coil lead wire includes two, two the voice coil lead wire laminating respectively is fixed in same two of skeleton body extend the wall and follow respectively corresponding extend the wall extension.
Preferably, the voice coil body is of a rectangular structure with round corners, and the four extension walls are respectively and fixedly connected to the four round corners of the voice coil body.
Preferably, the magnetic circuit system comprises a magnetic yoke fixed on one side of the diaphragm, a main magnetic steel near the one side of the diaphragm, and an auxiliary magnetic steel fixed on one side of the diaphragm, wherein the magnetic yoke is formed at an interval with the main magnetic steel, the auxiliary magnetic steel is provided with a yielding port, and the extension wall passes through the yielding port and extends into the magnetic gap.
Preferably, each framework surrounds to form an abdicating space; the auxiliary magnetic steel comprises two first auxiliary magnetic steels arranged at two opposite sides of the main magnetic steel at intervals and two second auxiliary magnetic steels arranged at two other opposite sides of the main magnetic steel at intervals, and each first auxiliary magnetic steel is accommodated in the abdicating space at the same side of the first auxiliary magnetic steel and is arranged at intervals with the second arm at the side; and the first auxiliary magnetic steel and the second auxiliary magnetic steel are formed at intervals to allow the position opening, each extending wall penetrates through the position opening corresponding to the extending wall and extends into the magnetic gap.
Preferably, each of the frame bodies includes a first section connected to the first arm and two second sections bent and extended from opposite ends of the first section to a direction close to the magnetic circuit system, and the two second sections are connected to the first arm respectively; the same two of skeleton body the second section is buckled respectively and is extended two the extension wall, it is by the same to let the space the skeleton body first section, two second section and two the extension wall encloses jointly.
Preferably, the basin frame comprises a bottom wall, an outer side wall extending from the outer side of the bottom wall towards the vibrating diaphragm along the vibration direction of the vibrating diaphragm, and an inner side wall extending from the inner side of the bottom wall towards the vibrating diaphragm along the vibration direction, the inner side wall forms an accommodating space in a surrounding manner, the inner side wall is provided with a yielding groove penetrating through the inner side wall, and the magnetic circuit system is accommodated in the accommodating space and is fixedly supported on the bottom wall; the first fixed arm is fixedly supported on the outer side wall, and the second arm is fixedly supported on the inner side wall; the vibrating diaphragm is including being fixed in the first fixed part of lateral wall, being fixed in the second fixed part of inside wall and connection first fixed part with the vibration portion of second fixed part, skeleton body coupling in the vibration portion, extend the wall and pass the groove of stepping down is in order to extend to in the magnetic gap.
Preferably, the vibration system further includes an auxiliary diaphragm, the auxiliary diaphragm includes a third fixing portion connected to the first arm far away from one side of the diaphragm, a fourth fixing portion connected to the second arm far away from one side of the diaphragm and fixed to the inner side wall, and a bending portion connected to the third fixing portion and the fourth fixing portion and arranged at an interval relative to the second elastic arm.
Preferably, the elastic conductive piece is a flexible circuit board electrically connected with the voice coil.
The invention provides a loudspeaker box, which comprises a sound production device and a cover plate, wherein the cover plate is arranged on one side of a basin frame, which is far away from a magnetic circuit system, and encloses an accommodating space together with the basin frame; the vibrating diaphragm and the cover plate jointly enclose a front sound cavity, the vibrating diaphragm and the basin frame jointly enclose a rear cavity, and the cover plate is provided with a sound outlet which communicates the front sound cavity with the outside.
Compared with the prior art, in the sound generating device of the invention, the voice coil comprises a voice coil body which is supported and fixed on the extension wall and is inserted in the magnetic gap, and a voice coil lead which is bent and extended towards the direction of the bonding pad from the voice coil body and is electrically connected with the bonding pad, the voice coil lead is attached and fixed on the extension wall and extends to the bonding pad along the extension wall, the assembly strength of the voice coil lead is improved, the fixing reliability of the voice coil lead is effectively improved, in the vibration process, the voice coil lead vibrates along with the vibration of the extension wall, so that the voice coil lead and the bonding pad are relatively static, the voice coil lead is ensured not to be damaged or not fall off from the bonding pad in the vibration process, the reliability of the electrical connection between the voice coil lead and the bonding pad is improved, the reliability of the sound generating device is effectively improved, and the sound generating device, so that the reliability of the loudspeaker enclosure is high.
[ 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 speaker box according to the present invention;
FIG. 2 is an exploded perspective view of a portion of the speaker cabinet of the present invention;
FIG. 3 is a schematic view of the assembly of the sound device according to the present invention;
FIG. 4 is an enlarged view of the portion A shown in FIG. 3;
FIG. 5 is a top view of FIG. 3;
FIG. 6 is an enlarged view of the portion indicated by B in FIG. 5;
FIG. 7 is a schematic cross-sectional view of a loudspeaker enclosure of the present invention;
FIG. 8 is an enlarged view of the portion indicated by C in FIG. 7;
FIG. 9 is a schematic cross-sectional view of another angle of the loudspeaker enclosure of the present invention;
fig. 10 is an enlarged view of a portion D shown in fig. 9.
[ 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. 1-10, the present invention provides a speaker box 200 and a sound generating device 100, respectively.
The sounding device 100 comprises a basin frame 1, a vibration system 2 respectively supported on the basin frame 1, and a magnetic circuit system 3 for driving the vibration system 2 to vibrate and sound, wherein the magnetic circuit system 3 is provided with a magnetic gap 30.
In the present embodiment, the vibration system 2 includes a diaphragm 21, an elastic conductive member 22, a bobbin 23, and a voice coil 24.
The vibrating diaphragm 211 is fixed at one end of the basin stand 1 and is used for vibrating and sounding; basin frame 1 include with diapire 11 that the relative interval of vibrating diaphragm 21 set up, by diapire 11 outside is followed vibrating diaphragm 21's vibration direction orientation lateral wall 12 that vibrating diaphragm 21 extends and by diapire 11 is inboard to be followed the vibration direction orientation the inside wall 13 that vibrating diaphragm 21 extends, inside wall 13 encloses into accommodation space 130, just inside wall 13 is equipped with the groove of stepping down 1301 that runs through it. Further, the diaphragm 21 includes a first fixing portion 211, a second fixing portion 212, and a vibrating portion 213; the first fixing portion 211 is fixed to the outer sidewall 12; the second fixing portion 212 is fixed to the inner sidewall 13; the vibration part 213 connects the first fixing part 211 and the second fixing part 212 to generate sound by vibration.
The elastic conductive member 22 includes a first fixing arm 221, a second fixing arm 222, a first elastic arm 223, and two pads 224.
Specifically, the first fixing arm 221 is connected to the basin stand 1; the second fixing arm 222 is spaced apart from the first fixing arm 221, and is configured to support the framework 23; the number of the first elastic arms 223 is two, and the two first elastic arms 223 connect the first fixing arm 221 and the second fixing arm 222; two of the pads 224 protrude from opposite ends of the second fixing arm 222.
Further, the second fixing arm 222 includes a first arm 2221 connected to the first elastic arm 223 and having two ends respectively connected to the two pads 224, a second arm 2222 located on a side of the first arm 2221 away from the first fixing arm 221 and spaced apart from the first arm 2221, and a second elastic arm 2223 connected to the second arm 2222 and the first arm 2221; more specifically, the first fixing arm 221 is fixedly supported by the outer sidewall 12, and the second arm 2222 is fixedly supported by the inner sidewall 13.
The framework 23 comprises a framework body 231 and an extension wall 232, the framework 23 surrounds to form an abdicating space 230, and the abdicating space 230 provides conditions for arranging magnetic steel in the range of the framework 23; the skeleton body 231 is supported by the second fixing arm 222 near one side of the diaphragm 21 and connected to the diaphragm 21; the extension wall 232 is bent and extended from the bobbin body 231 toward the magnetic circuit system 3, and partially extends into the magnetic gap 30; specifically, the skeleton body 231 is fixed in the first arm 2221 and connect in the vibration portion 213 is kept away from the cover plate 4 one side, the extension wall 232 by the skeleton body 231 is close to the one end of the pad 224 is bent and extended to form, the extension wall 232 passes the abdicating groove 1301 extends to in the magnetic gap 30.
Furthermore, the skeleton body 231 includes a first section 2311 connected to the first arm 2221 and two second sections 2312 bent and extended from opposite ends of the first section 2311 to a direction close to the magnetic circuit system 3, and the two second sections 2312 are connected to the first arm 2221; the two second sections 2312 of the same skeleton body 231 are respectively bent and extended to form two extending walls 232; the abdicating space 230 is defined by the first section 2311, the two second sections 2312 and the two extending walls 232 of the same skeleton body 231.
The voice coil 24 includes a voice coil body 241 and a voice coil lead 242; the voice coil body 241 is supported and fixed on the extension wall 232 and is inserted into the magnetic gap 30; the voice coil lead 242 is bent and extended from the voice coil body 241 toward the pad 224 and electrically connected to the pad 224, and the voice coil lead 242 is attached to and fixed to the extension wall 232 and extends to the pad 224 along the extension wall 232.
It should be noted that the elastic conductive member 22 is a flexible circuit board electrically connected to the voice coil 24, and the elastic conductive member 22 is electrically connected to the voice coil lead 242 through the bonding pad 224.
It should be noted that the number of the elastic conductive members and the skeletons is not limited, and may be set according to actual situations, for example, in the present embodiment, the elastic conductive members 22 include two and are set at intervals, the skeletons 23 include two and are respectively connected to the two elastic conductive members 22, and the skeleton body 231 of each skeleton 23 is bent and extended to form two extension walls 232 near opposite ends of the magnetic circuit system 3; the voice coil leads 242 include two voice coil leads 242, and the two voice coil leads 242 are respectively attached to and fixed to the same two extension walls 232 of the bobbin body 231 and respectively extend along the corresponding extension walls 232.
Further, the structural form of the voice coil body is not limited, and may be selected according to actual situations, for example, in the present embodiment, the voice coil body 241 has a rectangular structure with rounded corners, and the four extension walls 232 are respectively fixedly connected to the positions of the four rounded corners of the voice coil body 241.
In the above structure, the voice coil lead 242 is attached and fixed to the extension wall 232, so that the overall assembly strength of the voice coil lead 242 is effectively improved, and the fixing reliability of the voice coil lead 242 is improved.
Furthermore, in order to improve the vibration reliability of the vibration system 2, the vibration system 2 may further add an auxiliary diaphragm 25 for increasing the elastic stiffness of the elastic conductive member 22, where the auxiliary diaphragm 25 is connected to the elastic conductive member 22 on the side away from the diaphragm 21; specifically, the auxiliary diaphragm 25 includes a third fixing portion 251 connected to the first arm 2221 on a side far from the diaphragm 21, a fourth fixing portion 252 connected to the second arm 2222 on a side far from the diaphragm 21, and a folded ring portion 253 connected to the third fixing portion 251 and the fourth fixing portion 252 and disposed opposite to the two second elastic arms 2223 at an interval.
The magnetic circuit system 3 is accommodated in the accommodating space 130 and is fixedly supported on the bottom wall 11.
In this embodiment, more specifically, the second fixing arms 222 of the two elastic conductive devices 22 together enclose a hollow area 220, and the magnetic circuit system 3 is located in the hollow area 220 and is spaced from the two second fixing arms 222 respectively.
The magnetic circuit system 3 comprises a magnetic yoke 31, a main magnetic steel 32 and an auxiliary magnetic steel (not shown); the magnetic yoke 31 is fixed on one side of the basin stand 1 away from the diaphragm 21, that is, the magnetic yoke 31 is fixed with the bottom wall 11; the main magnet steel 32 is fixed on one side of the magnetic yoke 31 close to the diaphragm 21; the auxiliary magnetic steel is fixed on one side of the magnetic yoke 31 close to the vibrating diaphragm 21 and forms the magnetic gap 30 with the main magnetic steel 32 at an interval, the auxiliary magnetic steel is provided with a relief opening 301, and the extension wall 232 extends into the magnetic gap 30 through the relief opening 301.
The number and specific position of the secondary magnetic steels are not limited, for example, in the present embodiment, the secondary magnetic steels include two first secondary magnetic steels 33 disposed at two opposite sides of the primary magnetic steel 32 at intervals, and two second secondary magnetic steels 34 disposed at two opposite sides of the primary magnetic steel 32 at intervals; each first auxiliary magnetic steel 33 is respectively accommodated in the abdicating space 230 on the same side, each first auxiliary magnetic steel 33 is arranged at an interval with the second arm 2222 on the side, and the adjacent first auxiliary magnetic steel 33 and the second auxiliary magnetic steel 34 form an abdicating opening 301 at an interval; each of the extension walls 232 sequentially passes through the corresponding relief groove 1301 and the relief opening 301 to extend into the magnetic gap 30 and abut against the voice coil body 241.
The speaker box comprises the sound production device 100 and the cover plate 4. In this embodiment, the cover plate 4 covers the basin frame 1, is far away from the magnetic circuit 3 side and encloses into the accommodating space 10 together with the basin frame 1, the vibration system 2 with the magnetic circuit 3 accept respectively in the accommodating space 10, the vibrating diaphragm 21 clamp establish be fixed in the cover plate 4 with between the basin frame 1, just the vibrating diaphragm 21 will the accommodating space 10 is separated into preceding sound chamber 101 and back chamber 102, the cover plate 4 is equipped with the sound outlet 40 that communicates preceding sound chamber 101 with the external world.
Specifically, the diaphragm 21 and the cover plate 4 together enclose the front sound cavity 101, and the sound outlet 110 communicates the front sound cavity 101 with the outside to form a side sound structure; the diaphragm 21 and the frame 1 together enclose the rear cavity 102, and the rear cavity 102 is used for improving the low-frequency acoustic performance of the sound production device 100.
Compared with the prior art, in the sound generating device of the invention, the voice coil comprises a voice coil body which is supported and fixed on the extension wall and is inserted in the magnetic gap, and a voice coil lead which is bent and extended towards the direction of the bonding pad from the voice coil body and is electrically connected with the bonding pad, the voice coil lead is attached and fixed on the extension wall and extends to the bonding pad along the extension wall, the assembly strength of the voice coil lead is improved, the fixing reliability of the voice coil lead is effectively improved, in the vibration process, the voice coil lead vibrates along with the vibration of the extension wall, so that the voice coil lead and the bonding pad are relatively static, the voice coil lead is ensured not to be damaged or not fall off from the bonding pad in the vibration process, the reliability of the electrical connection between the voice coil lead and the bonding pad is improved, the reliability of the sound generating device is effectively improved, and the sound generating device, so that the reliability of the loudspeaker enclosure is high.
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 (10)

1. A sounding device comprises a basin frame, a vibration system and a magnetic circuit system, wherein the vibration system is respectively supported on the basin frame, the magnetic circuit system drives the vibration system to vibrate and sound, and the magnetic circuit system is provided with a magnetic gap; vibration system includes the vibrating diaphragm and inserts and locate the magnetic gap is in order to drive the voice coil loudspeaker voice coil of vibrating diaphragm vibration sound production, its characterized in that, vibration system still includes:
the elastic conductive piece comprises a first fixed arm connected to the basin frame, a second fixed arm arranged at an interval with the first fixed arm, a first elastic arm connected with the first fixed arm and the second fixed arm, and two welding pads extending from two opposite ends of the second fixed arm in a protruding manner; and the number of the first and second groups,
the framework comprises a framework body and an extension wall, the framework body is supported on one side, close to the vibrating diaphragm, of the second fixing arm and connected to the vibrating diaphragm, the extension wall is bent and extended from the framework body to the direction close to the magnetic circuit system, and the extension wall extends into the magnetic gap;
the voice coil comprises a voice coil body which is supported and fixed on the extension wall and is inserted into the magnetic gap, and a voice coil lead which is bent and extended from the voice coil body to the direction of the bonding pad and is electrically connected with the bonding pad, wherein the voice coil lead is attached to and fixed on the extension wall and extends to the bonding pad along the extension wall;
the second fixing arm comprises a first arm, a second arm and a second elastic arm, wherein the first arm is connected to the first elastic arm, two ends of the first arm are respectively connected with the two bonding pads, the second arm is positioned on one side, far away from the first fixing arm, of the first arm and is arranged at an interval with the first arm, and the second elastic arm is connected with the second arm and the first arm; the framework body is fixed in the first arm, extend the wall by the framework body is close to the one end bending type of pad extends and forms.
2. The sounding device according to claim 1, wherein the resilient conductive members include two resilient conductive members spaced apart from each other, the skeleton includes two resilient conductive members connected to the two resilient conductive members, and the skeleton body of each of the skeletons is bent and extended to form two extending walls near opposite ends of the magnetic circuit system; the voice coil lead wire includes two, two the voice coil lead wire laminating respectively is fixed in same two of skeleton body extend the wall and follow respectively corresponding extend the wall extension.
3. The sounding device according to claim 2, wherein the voice coil body is a rectangular structure with rounded corners, and four of the extension walls are fixedly connected to the voice coil body at four rounded corners respectively.
4. The sound production device according to claim 1, wherein the magnetic circuit system comprises a magnetic yoke fixed on a side of the basin frame away from the diaphragm, a main magnetic steel fixed on a side of the magnetic yoke close to the diaphragm, and an auxiliary magnetic steel fixed on a side of the magnetic yoke close to the diaphragm and spaced from the main magnetic steel to form the magnetic gap, the auxiliary magnetic steel is provided with a relief opening, and the extension wall extends into the magnetic gap through the relief opening.
5. The sounder device according to claim 4, wherein each of the skeletons surrounds an abdicating space; the auxiliary magnetic steel comprises two first auxiliary magnetic steels arranged at two opposite sides of the main magnetic steel at intervals and two second auxiliary magnetic steels arranged at two other opposite sides of the main magnetic steel at intervals, and each first auxiliary magnetic steel is accommodated in the abdicating space at the same side of the first auxiliary magnetic steel and is arranged at intervals with the second arm at the side; and the first auxiliary magnetic steel and the second auxiliary magnetic steel are formed at intervals to allow the position opening, each extending wall penetrates through the position opening corresponding to the extending wall and extends into the magnetic gap.
6. The sounding device as claimed in claim 5, wherein each of the skeleton bodies comprises a first section connected to the first arm and two second sections extending from opposite ends of the first section and bent toward the direction of the magnetic circuit respectively, and the two second sections are connected to the first arm respectively; the same two of skeleton body the second section is buckled respectively and is extended two the extension wall, it is by the same to let the space the skeleton body first section, two second section and two the extension wall encloses jointly.
7. The sound production device according to claim 1, wherein the basin frame comprises a bottom wall, an outer side wall extending from the outer side of the bottom wall towards the vibrating diaphragm along the vibration direction of the vibrating diaphragm, and an inner side wall extending from the inner side of the bottom wall towards the vibrating diaphragm along the vibration direction, the inner side wall encloses an accommodating space, the inner side wall is provided with a relief groove penetrating through the inner side wall, and the magnetic circuit system is accommodated in the accommodating space and fixedly supported on the bottom wall; the first fixed arm is fixedly supported on the outer side wall, and the second arm is fixedly supported on the inner side wall; the vibrating diaphragm is including being fixed in the first fixed part of lateral wall, being fixed in the second fixed part of inside wall and connection first fixed part with the vibration portion of second fixed part, skeleton body coupling in the vibration portion, extend the wall and pass the groove of stepping down is in order to extend to in the magnetic gap.
8. The sounding device according to claim 7, wherein the vibration system further comprises an auxiliary diaphragm, the auxiliary diaphragm comprises a third fixing portion connected to a side of the first arm away from the diaphragm, a fourth fixing portion connected to a side of the second arm away from the diaphragm and fixing the inner side wall, and a bending portion connected to the third fixing portion and the fourth fixing portion and disposed opposite to the two elastic arms.
9. The sounder device according to any one of claims 1-8, wherein the resilient conductive member is a flexible circuit board electrically connected to the voice coil.
10. A loudspeaker box, characterized in that, the loudspeaker box comprises the sound production device as claimed in any one of claims 1 to 9 and a cover plate, the cover plate is arranged on one side of the frame away from the magnetic circuit system and encloses an accommodating space together with the frame, the vibration system and the magnetic circuit system are respectively accommodated in the accommodating space, and the diaphragm is clamped and fixed between the cover plate and the frame; the vibrating diaphragm and the cover plate jointly enclose a front sound cavity, the vibrating diaphragm and the basin frame jointly enclose a rear cavity, and the cover plate is provided with a sound outlet which communicates the front sound cavity with the outside.
CN201911382552.2A 2019-12-27 2019-12-27 Sound production device and loudspeaker box thereof Active CN111405431B (en)

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