CN111343544B - Sound production device - Google Patents

Sound production device Download PDF

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Publication number
CN111343544B
CN111343544B CN202010148715.7A CN202010148715A CN111343544B CN 111343544 B CN111343544 B CN 111343544B CN 202010148715 A CN202010148715 A CN 202010148715A CN 111343544 B CN111343544 B CN 111343544B
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CN
China
Prior art keywords
annular
diaphragm
fixed
cover
magnetic
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Active
Application number
CN202010148715.7A
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Chinese (zh)
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CN111343544A (en
Inventor
令狐荣林
肖波
章统
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AAC Technologies Pte Ltd
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AAC Technologies Pte Ltd
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Priority to CN202010148715.7A priority Critical patent/CN111343544B/en
Publication of CN111343544A publication Critical patent/CN111343544A/en
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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
    • H04R9/00Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02Details
    • H04R9/04Construction, mounting, or centering of coil
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M1/00Substation equipment, e.g. for use by subscribers
    • H04M1/02Constructional features of telephone sets
    • H04M1/03Constructional features of telephone transmitters or receivers, e.g. telephone hand-sets
    • 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
    • H04R7/02Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/12Non-planar 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
    • H04R9/025Magnetic circuit
    • H04R9/027Air gaps using a magnetic fluid

Abstract

The invention provides a sounding device, which comprises a basin frame with an accommodating space, a vibration system accommodated in the accommodating space and a magnetic circuit system for driving the vibration system to vibrate and sound, wherein the magnetic circuit system comprises a magnetic yoke fixed on the basin frame; the vibration system comprises a first diaphragm which divides the accommodating space into a front cavity and a rear cavity; the sounder is still including connecting the basin frame with the dust cover of yoke, the dust cover will the back chamber divide into and is close to the first back chamber of first vibrating diaphragm and keep away from the second back chamber of first vibrating diaphragm, the dust cover include with basin frame fixed connection's first fixed part, fixed the second fixed part and the connection of yoke the connecting portion of first fixed part and second fixed part, the connecting portion orientation the protruding bellying that forms that extends of first vibrating diaphragm direction. The dust cover of the sound production device can increase the volume of the rear cavity and increase the filling volume of the sound absorption particles.

Description

Sound production device
[ technical field ] A method for producing a semiconductor device
The invention relates to the field of electronic products, in particular to a sounding device.
[ 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.
Related art the sounder include the basin frame that has accommodating space, install the vibration system in basin frame accommodating space and have the magnetic circuit in magnetic gap, the basin frame includes upper cover and lower cover, and upper cover and lower cover lock joint form accommodating space, vibration system with magnetic circuit will accommodating space separates into front chamber and back chamber. The vibration system comprises a vibration diaphragm, an annular ball top, a framework, a voice coil and a dust cover, wherein the annular ball top is connected with the vibration diaphragm, and the voice coil is connected with the annular ball top through the framework in the vibration direction so as to drive the vibration diaphragm to vibrate and produce sound; the voice coil is inserted into the magnetic gap to drive the vibrating diaphragm to sound, and the vibrating diaphragm is arranged opposite to the magnetic circuit system; the vibrating diaphragm sets up with the upper cover interval and forms the front chamber, and the dust cover is located magnetic circuit and sets up with the lower cover interval and form the back chamber, and the back chamber intussuseption is filled with and inhales the sound granule.
However, in the sound device of the related art, the volume of the rear cavity formed by the dust cover and the lower cover of the existing sound device is small, and more sound absorption particles cannot be filled in the rear cavity, so that the performance of the sound device is affected.
Therefore, it is necessary to provide a new sound-producing device to solve the above technical problems.
[ summary of the invention ]
The invention aims to provide a sound production device capable of increasing the volume of sound absorption particles filled in a rear cavity.
In order to achieve the above object, the present invention provides a sound production device, comprising a basin frame having an accommodating space, a vibration system accommodated in the accommodating space, and a magnetic circuit system for driving the vibration system to vibrate and produce sound, wherein the magnetic circuit system comprises a magnetic yoke fixed on the basin frame; the vibration system comprises a first vibrating diaphragm fixedly connected with the basin frame and a voice coil fixed on the first vibrating diaphragm and driving the first vibrating diaphragm to vibrate and sound, and the first vibrating diaphragm divides the accommodating space into a front cavity far away from one side of the magnetic circuit system and a rear cavity close to one side of the magnetic circuit system; the sounder still including connecting the basin frame with the dust cover of yoke, the dust cover will the back chamber divide into and is close to the first back chamber of first vibrating diaphragm and keep away from the second back chamber of first vibrating diaphragm, the dust cover include with basin frame fixed connection's first fixed part, fixed the second fixed part of yoke and connection the connecting portion of first fixed part and second fixed part, connecting portion include the orientation the protruding bellying that forms that extends of first vibrating diaphragm direction, first vibrating diaphragm includes the orientation and keeps away from the bellied ring that rolls over of magnetic circuit direction, the bellying with it corresponds the interval setting to roll over the ring.
Preferably, the basin frame is including being close to the upper cover of first vibrating diaphragm, being close to the lower cover of yoke and connecting the center and the lower cover of upper cover and lower cover, upper cover, center and lower cover are matched stack each other in order to form accommodating space, first vibrating diaphragm press from both sides establish be fixed in the upper cover with between the center, first fixed part press from both sides establish be fixed in the center with between the lower cover.
Preferably, the dust cover further includes a bending portion formed by bending and extending the lower cover from the first fixing portion toward the edge away from the first diaphragm and along the vibration direction of the first diaphragm, and the connecting portion is formed by horizontally extending the edge away from the first fixing portion from the bending portion toward the second fixing portion.
Preferably, the second fixing portion is formed by bending and extending the inner edge of the protruding portion towards the lower cover, the second fixing portion includes a second bottom wall fixedly connected with the magnetic yoke, an annular side wall bent and extended from the edge of the second bottom wall, and a second bottom wall connected with the annular side wall, the annular side wall faces the first vibrating diaphragm, the first vibrating diaphragm is bent and extended to be connected with the protruding portion, the annular side wall and the second bottom wall enclose a containing space, the second bottom wall is provided with a mounting hole communicated with the containing space, and the magnetic yoke is fixed to the second bottom wall, and the second vibrating diaphragm is accommodated in the containing space towards one side of the first vibrating diaphragm.
Preferably, the protruding portion includes a second sidewall extending horizontally from one end of the annular sidewall away from the second bottom wall toward the first fixing portion, and a first sidewall extending in a direction away from the first diaphragm from one end of the second sidewall away from the annular sidewall, and the connecting portion further includes a third sidewall extending horizontally from one end of the first sidewall away from the second sidewall toward the first fixing portion to be fixedly connected with the bending portion.
Preferably, the first sidewall extends in a vibration direction of the first diaphragm.
Preferably, the second bottom wall is provided with a mounting hole penetrating through the second bottom wall along the vibration direction, and the magnetic yoke is fixed on one side of the second bottom wall close to the first vibrating diaphragm and partially extends into the mounting hole.
Preferably, the magnetic circuit system further includes a main magnetic steel fixed to the yoke, a plurality of auxiliary magnetic steels surrounding the main magnetic steel and forming magnetic gaps at intervals, and a pole core fixed to one end of the main magnetic steel and the auxiliary magnetic steel far away from the yoke, the annular side wall surrounds the auxiliary magnetic steel, the yoke is installed in the installation hole and abutted to the second bottom wall, the height of the auxiliary magnetic steel in the vibration direction of the first vibrating diaphragm is greater than the height of the annular side wall in the vibration direction, the auxiliary magnetic steels are arranged at intervals to form avoiding notches, the vibrating system further includes a framework connecting the first vibrating diaphragm and the voice coil, and the framework penetrates through the avoiding notches to suspend the voice coil in the magnetic gaps.
Preferably, first vibrating diaphragm is including pressing from both sides to be located vice magnet steel with first annular vibrating diaphragm between the utmost point core, press from both sides to establish and be fixed in the upper cover with second annular vibrating diaphragm between the center and connect first annular vibrating diaphragm with annular ball top between the second annular vibrating diaphragm, roll over the ring and locate first annular vibrating diaphragm.
Preferably, the vibration system further includes a framework connecting the first diaphragm and the voice coil, and an elastic support member disposed at an interval with the first diaphragm, the elastic support member is annular, an outer edge of the elastic support member is clamped and fixed between the middle frame and the lower cover, one end of the framework is connected with the annular dome, and the other end of the framework is fixedly connected with an inner edge of the elastic support member.
Preferably, the framework comprises a first annular portion, a second annular portion and a connecting arm for connecting the first annular portion and the second annular portion, the first annular portion is located in the magnetic gap and connected with the voice coil, the connecting arm is arranged in the avoiding notch in a penetrating mode, one end of the second annular portion is connected with the annular dome, and the other end of the second annular portion is connected with the inner edge of the elastic supporting piece.
Preferably, both ends of the connecting arm are arranged in a stepped shape, the first annular portion and the second annular portion are respectively connected with both ends of the connecting arm, and the first annular portion is closer to the lower cover than the second annular portion.
Preferably, the elastic support member includes a second vibrating diaphragm in an annular shape and an installation member attached to an inner edge of the second vibrating diaphragm, an outer edge of the second vibrating diaphragm is fixedly connected to the middle frame, and an end of the second annular portion, which is further away from the annular dome, is fixedly connected to the frame through the installation member.
Preferably, the bending portion, the third side wall and the first side wall enclose an avoidance space corresponding to the second diaphragm. .
Compared with the prior art, the sound production device provided by the invention has the advantages that the connecting part of the dust cover is provided with the bulge part protruding towards the upper cover and the second fixing part connected with the bulge part, and the connecting part, the bulge part, the magnetic circuit system and the lower cover jointly enclose the second rear cavity, so that the volume of the second rear cavity is enlarged, the volume of sound absorption particles filled in the second rear cavity is increased, the F0 of the sound production device is reduced, the low-frequency sensitivity is improved, and the performance of the sound production device is 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 an exploded view of a sound device of the present invention, including a frame, a vibration system, a magnetic circuit system and a dust cover;
fig. 2 is an exploded view of the magnetic circuit system shown in fig. 1;
FIG. 3 is a perspective view of the dust cap shown in FIG. 1;
FIG. 4 is an assembled structural view of the sound device shown in FIG. 1;
fig. 5 is a cross-sectional view of the sound producing device of fig. 4 taken along line a-a of fig. 4.
[ 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 to 5, the sound generating device 100 according to the present invention includes a frame 10 having a receiving space 14, a vibration system 20 received in the receiving space 14, a magnetic circuit system 30 for driving the vibration system 20 to vibrate and generate sound, and a dust cover 40.
The basin stand 10 comprises an upper cover 11, a lower cover 12 and a middle frame 13, wherein the upper cover 11, the middle frame 13 and the lower cover 12 are assembled to form the accommodating space 14. Specifically, the upper cover 11 includes a top wall 111, a first side wall 112 bent and extended from an edge of the top wall 111, a sound emitting portion 113 protruding from the top wall 111, and a sound emitting hole 114 penetrating the sound emitting portion 113 and communicating with the outside. The lower cover 12 includes a bottom wall 121 and a second sidewall 122 extending from the bottom wall 121. The middle frame 13 is sandwiched between the first side wall 112 and the second side wall 122.
The magnetic circuit system 30 includes a magnetic yoke 31 close to the lower cover 12, a main magnetic steel 32 fixed to the magnetic yoke 31, a plurality of sub magnetic steels 33 surrounding the main magnetic steel 32 with a magnetic gap 35 therebetween, and a pole piece 34 attached to the main magnetic steel 32 and the sub magnetic steel 33 on a side away from the magnetic yoke 31. In this embodiment, the number of the auxiliary magnetic steels 33 is four, and the avoidance gaps 36 are formed between two adjacent auxiliary magnetic steels 33. It is understood that the number of the secondary magnetic steels 33 is not limited to four, for example, two secondary magnetic steels 33 are provided, and it is also possible that two secondary magnetic steels 33 are respectively provided on two opposite sides of the primary magnetic steel 32. The magnetic yoke 31 is mounted on the dust cover 40, one side of the main magnet 32 and the auxiliary magnet 33 is attached to the magnetic yoke 31, and the pole core 34 is attached to one side of the main magnet 32 and the auxiliary magnet 33 away from the magnetic yoke 31.
The vibration system 20 includes a voice coil 21 inserted into the magnetic gap 35, a first diaphragm 22 adjacent to the upper cover 11 and fixedly connected to the upper cover 11, a frame 23 connecting the voice coil 21 and the first diaphragm 22, and an elastic support 24 spaced from the first diaphragm 22 and fixedly connected to the middle frame 13, wherein the first diaphragm 22 divides the accommodating space 14 into a front cavity 141 on a side away from the magnetic circuit 30 and a rear cavity 142 on a side adjacent to the magnetic circuit 30. The first diaphragm 22 includes a corrugated rim protruding away from the magnetic circuit 30.
The first diaphragm 22 includes an annular dome 221, a first annular diaphragm 222 connected to the magnetic circuit system 30, and a second annular diaphragm 223 connected to the upper cover 11, the annular dome 221 is disposed between and connects the first annular diaphragm 222 and the second annular diaphragm 223, and the annular dome 221 is connected to an end of the framework 23 away from the elastic support member 24.
Specifically, the annular dome 221 is an annular thin plate, and the first annular diaphragm 222 includes an annular first folding ring 2221, and a third fixing portion 2222 and a fourth fixing portion 2223 respectively extending from the inner and outer side edges of the folding ring 2221. The first folding ring 2221 is provided to protrude in a direction away from the magnetic circuit system 30. The second annular diaphragm 223 includes an annular second flange 2231, and a fifth fixing portion 2232 and a sixth fixing portion 2233 respectively extending from the inner and outer side edges of the second flange 2231, the inner side of the annular dome 221 is connected to the fourth fixing portion 2223, and the outer side of the annular dome 221 is connected to the fifth fixing portion 2232. The sixth fixing portion 2233 is interposed and fixed between the first sidewall 112 of the upper cover 11 and the middle frame 13. The third fixing portion 2222 is interposed and fixed between the pole core 34 and the sub-magnet 33. Since the third fixing portion 2222 on the inner side of the first ring-shaped diaphragm 222 is fixed to the pole core 34 by gluing, the height of the magnetic circuit system 30 is increased, the BL value (force-to-electric coupling coefficient) of the sound-generating device 100 is increased, and the sensitivity of the sound-generating device 100 is increased.
The first diaphragm 22, the pole core 34 and the top wall 111 of the upper cover 11 are spaced apart from each other, and together enclose a front cavity 141 of the sound generating device 100. The front chamber 141 communicates with the sound outlet 114.
The bobbin 23 includes a first annular portion 231, a second annular portion 232, and a plurality of connecting arms 233 connecting the first annular portion 231 and the second annular portion 232. The first annular portion 231 is located in the magnetic gap 35 of the magnetic circuit system 30 and connected to the voice coil 21, one end of the second annular portion 232 is connected to the annular dome 221, and the other end of the second annular portion 232 is connected to the inner edge of the elastic support 24. The connecting arm 233 is movably inserted into the avoiding notch 36 of the magnetic circuit system 30. The two ends of the connecting arm 233 are disposed in a step shape, the first annular portion 231 and the second annular portion 232 are respectively connected to the two ends of the connecting arm 233, and the first annular portion 231 is lower than the second annular portion 232, that is, the first annular portion 231 and the second annular portion 232 are disposed in a high-low manner, and the first annular portion 231 is closer to the lower cover 12 than the second annular portion 232. The two ends of the connecting arm 233 are arranged in a step shape, the first annular portion 231 and the second annular portion 232 are arranged in a high-low position, the first annular portion 231 and the second annular portion 232 are closer to the lower cover 12, and when the voice coil 21 drives the connecting arm 233 to move in the magnetic gap 35, the vibration stroke of the first diaphragm 2312 is not affected by the interference between the connecting arm 233 and the pole core 34.
When the voice coil 21 moves in the magnetic circuit system 30, the voice coil 21 drives the first diaphragm 22 to vibrate and generate sound in the front cavity 141 through the framework 23.
The elastic supporting member 24 includes a second diaphragm 241 having a ring shape and a mounting member 242 attached to an inner edge of the second diaphragm 241. The outer edge of the second diaphragm 241 is fixedly connected to the middle frame 13, and the mounting member 242 is fixedly connected to the other end of the second annular portion 232 of the framework 23 away from the annular dome 221. Specifically, the second diaphragm 241 has substantially the same structure as the second ring-shaped diaphragm 223. The mounting member 242 is in the shape of an annular thin plate, the upper and lower sides of the mounting member 242 are respectively connected to the second annular portion 232 of the framework 23 and the inner side of the second diaphragm 241, the outer side of the second diaphragm 241 is clamped between the middle frame 13 and the second sidewall 122 of the lower cover 12, and the second diaphragm 241 and the second annular diaphragm 223 are spaced apart from each other and are disposed opposite to each other. Optionally, the second diaphragm 241 is an integral annular structure, and the integral structure has better swing-inhibiting capability for a super-linear sound-generating device with an ultra-large amplitude, and the effect is more obvious.
The dust cover 40 is used for fixing the magnetic circuit system 30 and preventing dust from entering the magnetic circuit system 30 and the vibration system 20, and divides the back cavity 142 into a first back cavity 1421 close to the first diaphragm 22 and a second back cavity 1422 far from the first diaphragm 22. Specifically, the dust cover 40 further includes a first fixing portion 41 fixedly connected to the lower cover 12, a second fixing portion 42 for fixing the magnetic circuit system 30, a connecting portion 43 for connecting the first fixing portion 41 and the second fixing portion 42, and a bending portion 44 formed by bending and extending from the first fixing portion 41 toward and away from the first diaphragm 22 and along the vibration direction of the first diaphragm 22, where the connecting portion 43 includes a protruding portion 431 formed by extending toward a protrusion of the first diaphragm 22, and the protruding portion 431 is disposed at an interval from the first diaphragm 22 and corresponds to the first folding ring 2221. The dust cover 40, the magnetic yoke 31, the middle frame 13, the first diaphragm 22 and the pole core 34 enclose the first rear cavity 1421, and the dust cover 40, the lower cover 12 and the magnetic yoke 31 enclose the second rear cavity 1422 of the sound generating device 100.
The protruding portion 431 includes a second sidewall 4312 extending horizontally from an end of the annular sidewall 421 away from the second bottom wall 422 toward the first fixing portion 41, and a first sidewall 4311 extending from an end of the second sidewall 4312 away from the annular sidewall 421 to bend in a direction away from the first diaphragm 22, and the first sidewall 4311 extends along a vibration direction of the first diaphragm 22. The connecting portion 43 further includes a third side wall 432 extending horizontally from an end of the first side wall 4311 away from the second side wall 4312 toward the first fixing portion 41 to be fixedly connected to the bending portion 44. . The bent portion 44, the third sidewall 432 and the first sidewall 4311 form an avoiding space 45 corresponding to the second diaphragm 241, so as to prevent the second diaphragm 241 from interfering with the dust cover 40 during vibration; the protrusion 431 is located inside the inner edge of the second diaphragm 241 such that the protrusion 431 does not interfere with the elastic support 24.
The connecting portion 43 extends from the edge of the bending portion 44 away from the first fixing portion 41 toward the second fixing portion 42. The protrusion 431 connects the connecting portion 43 and the second fixing portion 42, and the protrusion 431 is located inside the inner edge of the elastic support 24, that is, the inside of the elastic support 24 has an escape space, so that the protrusion 431 does not interfere with the elastic support 24. The receiving portion is formed by bending and extending from the inner edge of the protruding portion toward the lower cover, the second fixing portion 42 includes an annular side wall 421 and a second bottom wall 422 connected to the annular side wall 421, the annular side wall 421 and the second bottom wall 422 enclose a receiving space 423, the second bottom wall 422 is provided with a mounting hole 424 penetrating through the first diaphragm 22 in the vibration direction, the yoke 31 is fixed to one side of the second bottom wall 422 close to the first diaphragm 22 and partially extends into the mounting hole 424, the main magnet steel 32 and the sub magnet steel 33 of the magnetic circuit system 30 are partially received in the receiving space 423, specifically, the annular side wall 421 surrounds the sub magnet steel 33, the height of the sub magnet steel 33 in the vibration direction of the first diaphragm 22 is greater than the height of the annular side wall 421 in the vibration direction of the first diaphragm 22, so that the connecting arm 233 of the framework 23 smoothly passes through the avoiding gap 36 between the sub magnet steels 33, and the first annular portion 231 suspends the voice coil 21 in the magnetic gap 35.
Compared with the planar dust cover in the prior art, the protrusion 431 and the connecting portion 43 of the dust cover 40 of the sound-generating device 100 of the present invention and the second sidewall 122 of the lower cover 12 enclose an expansion space, which enlarges the volume of the second rear cavity 1422, increases the volume of the sound-absorbing particles filled in the second rear cavity, reduces F0 of the sound-generating device 100, and improves low-frequency sensitivity, thereby improving the performance of the sound-generating device 100.
Compared with the prior art, the sound production device provided by the invention has the advantages that the connecting part of the dust cover is provided with the bulge part protruding towards the upper cover and the second fixing part connected with the bulge part, and the connecting part, the bulge part, the magnetic circuit system and the lower cover jointly enclose the second rear cavity, so that the volume of the second rear cavity is enlarged, the volume of sound absorption particles filled in the second rear cavity is increased, the F0 of the sound production device is reduced, the low-frequency sensitivity is improved, and the performance of the sound production device is 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 (14)

1. A sounding device comprises a basin frame with an accommodating space, a vibration system accommodated in the accommodating space and a magnetic circuit system for driving the vibration system to vibrate and sound, wherein the magnetic circuit system comprises a magnetic yoke fixed on the basin frame;
the vibration system comprises a first vibrating diaphragm fixedly connected with the basin frame and a voice coil fixed on the first vibrating diaphragm and driving the first vibrating diaphragm to vibrate and sound, and the first vibrating diaphragm divides the accommodating space into a front cavity far away from one side of the magnetic circuit system and a rear cavity close to one side of the magnetic circuit system;
its characterized in that, the sounder is still including connecting the basin frame with the dust cover of yoke, the dust cover will the back chamber divide into and is close to the first back chamber of first vibrating diaphragm and keep away from the second back chamber of first vibrating diaphragm, the dust cover include with basin frame fixed connection's first fixed part, fixed the second fixed part of yoke and connection the connecting portion of first fixed part and second fixed part, connecting portion include the orientation the protruding bellying that extends of first vibrating diaphragm direction, first vibrating diaphragm includes that the orientation is kept away from the bellied book ring of magnetic circuit direction, the bellying with roll over the ring and correspond the interval setting.
2. The sound production device according to claim 1, wherein the frame comprises an upper cover close to the first diaphragm, a lower cover close to the magnetic yoke, and a middle frame connecting the upper cover and the lower cover, the upper cover, the middle frame, and the lower cover are mutually assembled to form the accommodating space, the first diaphragm is clamped and fixed between the upper cover and the middle frame, and the first fixing portion is clamped and fixed between the middle frame and the lower cover.
3. The sound production device of claim 2, wherein the dust cover further comprises a bending portion extending from the first fixing portion toward the edge away from the first diaphragm and bending and extending along the vibration direction of the first diaphragm, and the connecting portion extends from the edge of the bending portion away from the first fixing portion toward the second fixing portion.
4. The sounding device according to claim 3, wherein the second fixing portion includes a second bottom wall fixedly connected to the magnetic yoke and an annular sidewall extending from an edge of the second bottom wall, the annular sidewall extending toward the first diaphragm to connect to the protrusion, and the magnetic yoke is fixed to a side of the second bottom wall facing the first diaphragm.
5. The sounding device according to claim 4, wherein the protrusion includes a second sidewall extending horizontally from an end of the annular sidewall away from the second bottom wall toward the first fixing portion, and a first sidewall extending from an end of the second sidewall away from the annular sidewall and bending toward a direction away from the first diaphragm, and the connection portion further includes a third sidewall extending horizontally from an end of the first sidewall away from the second sidewall toward the first fixing portion to be fixedly connected to the bending portion.
6. The sounder device according to claim 5, wherein the first sidewall extends in a direction of vibration of the first diaphragm.
7. The sounding device according to claim 4, wherein the second bottom wall defines a mounting hole extending therethrough along the vibration direction, and the yoke is fixed to a side of the second bottom wall close to the first diaphragm and partially extends into the mounting hole.
8. The device of claim 5, wherein the magnetic circuit system further comprises a main magnetic steel fixed on the yoke, a plurality of sub magnetic steels surrounding the main magnetic steel and spaced apart from each other to form a magnetic gap, and a pole piece fixed on an end of the main magnetic steel and the sub magnetic steel away from the yoke, the annular sidewall surrounds the sub magnetic steel, a height of the sub magnetic steel in a vibration direction of the first diaphragm is greater than a height of the annular sidewall in the vibration direction, the plurality of sub magnetic steels are spaced apart from each other to form an avoidance gap, the vibration system further comprises a bobbin connecting the first diaphragm and the voice coil, and the bobbin passes through the avoidance gap to suspend the voice coil in the magnetic gap.
9. The sound production device according to claim 8, wherein the first diaphragm includes a first annular diaphragm sandwiched between the auxiliary magnetic steel and the pole core, a second annular diaphragm sandwiched and fixed between the upper cover and the middle frame, and an annular dome connected between the first annular diaphragm and the second annular diaphragm, and the corrugated ring is disposed on the first annular diaphragm.
10. The sounding device according to claim 9, wherein the vibration system further comprises an elastic supporting member spaced apart from the first diaphragm, the elastic supporting member is annular, an outer edge of the elastic supporting member is clamped and fixed between the middle frame and the lower cover, one end of the skeleton is connected to the annular dome, and the other end of the skeleton is fixedly connected to an inner edge of the elastic supporting member.
11. The sounding device as claimed in claim 10, wherein the bobbin comprises a first annular portion, a second annular portion and a connecting arm connecting the first annular portion and the second annular portion, the first annular portion is located in the magnetic gap and connected to the voice coil, the connecting arm is inserted into the avoiding gap, one end of the second annular portion is connected to the annular dome, and the other end of the second annular portion is connected to the inner edge of the elastic support.
12. The sounder device according to claim 11, wherein the connecting arm has a stepped configuration at each end thereof, the first and second annular portions being connected to the respective ends of the connecting arm, and the first annular portion being closer to the lower cover than the second annular portion.
13. The sounding device according to claim 10, wherein the elastic supporting member comprises a second diaphragm and a mounting member attached to an inner edge of the second diaphragm, an outer edge of the second diaphragm is fixedly connected to the middle frame, and an end of the second annular portion, which is away from the top of the annular dome, is fixedly connected to the frame through the mounting member.
14. The sound production device of claim 13, wherein the bending portion, the third sidewall and the first sidewall enclose an avoiding space corresponding to the second diaphragm.
CN202010148715.7A 2020-03-05 2020-03-05 Sound production device Active CN111343544B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010148715.7A CN111343544B (en) 2020-03-05 2020-03-05 Sound production device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202010148715.7A CN111343544B (en) 2020-03-05 2020-03-05 Sound production device
PCT/CN2020/078771 WO2021174574A1 (en) 2020-03-05 2020-03-11 Sound production device

Publications (2)

Publication Number Publication Date
CN111343544A CN111343544A (en) 2020-06-26
CN111343544B true CN111343544B (en) 2021-07-09

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