CN109862477B - Sound production device - Google Patents

Sound production device Download PDF

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Publication number
CN109862477B
CN109862477B CN201811640861.0A CN201811640861A CN109862477B CN 109862477 B CN109862477 B CN 109862477B CN 201811640861 A CN201811640861 A CN 201811640861A CN 109862477 B CN109862477 B CN 109862477B
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elastic
magnetic
voice coil
fixing
auxiliary
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CN109862477A (en
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宋威
张帆
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AAC Technologies Pte Ltd
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AAC Technologies Pte Ltd
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Abstract

The invention provides a sounding device, which 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 magnetic circuit system comprises a magnetic yoke, main magnetic steel, two first auxiliary magnetic steels and an upper clamping plate; the vibration system comprises a vibrating diaphragm, a voice coil and an elastic supporting assembly, and the elastic supporting assembly is connected with the vibration system; the upper clamping plate comprises a fixing ring fixed on the basin frame, a fixing plate extending from the fixing ring and two first auxiliary pole cores connected to the fixing plate and overlapped on the first auxiliary magnetic steel, and a gap space is formed between the first auxiliary pole cores and the fixing ring at intervals; the elastic support assembly comprises an elastic piece, the elastic piece comprises a first fixing arm, a second fixing arm and an elastic arm connected with the first fixing arm and the second fixing arm, and at least part of the elastic arm is located in the gap space. Compared with the related art, the sounding device provided by the invention has high reliability and excellent acoustic performance.

Description

Sound production device
[ technical field ] A method for producing a semiconductor device
The invention relates to the field of acoustoelectrics, 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. A sound generating device for playing sound is widely applied to smart mobile devices such as current mobile phones.
The sound production device in the related art 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 inserted in the magnetic gap to drive the vibrating diaphragm to vibrate and sound and an elastic supporting component fixedly connected with the vibrating diaphragm and/or the voice coil; the punch holder is including being fixed in solid fixed ring and fixed connection in of basin frame gu fixed ring just fold and locate the auxiliary pole core of vice magnet steel, the elastic support subassembly is close to the one end of basin frame is fixed in gu fixed ring, the elastic support subassembly includes the bullet arm of outside extension, the bullet arm with the interval of auxiliary pole core sets up.
However, in the sound-generating device of the related art, the auxiliary pole core is directly and fixedly connected to the fixing ring, the elastic arm of the elastic support component needs to be moved away from the auxiliary pole core, so that the extending length of the elastic arm is limited, the vibration effect of the elastic support component is poor, and the acoustic improvement of the sound-generating device is limited.
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 sound production device with high reliability and excellent acoustic performance.
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 gap, wherein the vibration system and the magnetic circuit system are respectively fixed on the basin frame; the magnetic circuit system comprises a magnetic yoke fixed on the basin frame, main magnetic steel fixed on the magnetic yoke, four first auxiliary magnetic steels arranged on two opposite sides of the main magnetic steel at intervals and enclosing a magnetic gap with the main magnetic steel, and an upper clamping plate fixed on the basin frame and covering the first auxiliary magnetic steels; the vibration system comprises vibrating diaphragms fixed on the basin frame, voice coils inserted in the magnetic gaps to drive the vibrating diaphragms to vibrate and produce sound, and elastic support assemblies fixed on the basin frame and opposite to the vibrating diaphragms and arranged at intervals, the number of the elastic support assemblies is four, the elastic support assemblies are arranged around the voice coils, and the elastic support assemblies are connected with the vibration system; an accommodating space is formed between the elastic support assembly and the voice coil, and the first auxiliary magnetic steel is positioned in the accommodating space; the upper clamping plate comprises an annular fixing ring fixed on the basin frame, two fixing plates extending from two opposite sides of the fixing ring to the first auxiliary magnetic steel, and two first auxiliary pole cores respectively connected to the two fixing plates and stacked on the two first auxiliary magnetic steels, and a gap space is formed between each first auxiliary pole core and the fixing ring; the elastic support assembly comprises an elastic piece, the elastic piece comprises a first fixing arm fixed on the basin frame, a second fixing arm spaced relatively from the first fixing arm and an elastic arm connected with the first fixing arm and the second fixing arm, and the elastic arm is at least partially located in the gap space.
Preferably, the elastic support component further comprises an auxiliary diaphragm attached to the elastic member and a support framework connected to the elastic member, and the support framework is connected to the diaphragm.
Preferably, the auxiliary diaphragm is close to one side of the voice coil is sunken to form a first abdicating groove, and the first auxiliary magnetic steel extends to the inside of the abdicating groove.
Preferably, the two elastic support assemblies are respectively and correspondingly arranged on two opposite sides of the voice coil with the two first auxiliary magnetic steels, each elastic piece comprises two second fixing arms arranged at intervals and two elastic arms extending from the first fixing arms to the two second fixing arms respectively, and each elastic arm is at least partially located in the gap space.
Preferably, the two elastic support assemblies together enclose 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, the voice coil is of a rectangular structure, the two elastic support assemblies are located on two sides of a short shaft of the voice coil, and the two first auxiliary magnetic steels are located on two sides of the short shaft of the voice coil.
Preferably, the voice coil is of a rectangular structure with rounded corners, and the two second fixing arms of each elastic support assembly are respectively located at two adjacent rounded corners of the voice coil.
Preferably, the elastic member is a flexible circuit board.
Compared with the prior art, according to the sound-generating device, each first auxiliary pole piece is arranged at a certain distance from the fixed ring and connected to the fixed plate on the same side of the fixed ring, each first auxiliary pole piece is indirectly connected to the fixed ring through the arrangement of the fixed plate, so that the fixed ring and each first auxiliary pole piece have a certain gap space, the elastic support assembly is fixed to the fixed ring and is partially located in the gap space, specifically, the elastic arm portion of the elastic support assembly is accommodated in the gap space, the gap through space increases more wiring space for the elastic arm, the vibration of the elastic support assembly is more stable through increasing the length of the elastic arm, and the reliability of the sound-generating device is further high; in addition, a certain accommodating space is formed between the voice coil and the elastic support assembly, each first auxiliary magnetic steel is positioned in the accommodating space between the elastic support assembly and the voice coil on the same side of the first auxiliary magnetic steel, the magnetic circuit system can realize a maximized three-magnetic-steel or five-magnetic-steel structure, the design limitation of the magnetic circuit system is released, and the acoustic performance of the sound production 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 a first exploded view of a part of a three-dimensional structure of a sound device according to the present invention;
FIG. 3 is a second exploded view of a part of the three-dimensional structure of the sound device of the present invention;
FIG. 4 is a schematic perspective view of the upper plate and the elastic member of the sound device of the present invention;
FIG. 5 is an exploded perspective view of a portion of the resilient support assembly of the sound device of the present invention;
FIG. 6 is a schematic perspective view of the elastic support assembly, the support frame and the voice coil of the sound device according to the present invention;
FIG. 7 is a schematic perspective view of an elastic support assembly of the sound device of the present invention;
FIG. 8 is an exploded perspective view of the resilient support assembly and the first secondary magnetic steel of the sound device of the present invention;
FIG. 9 is a schematic perspective view of the elastic support assembly and the first auxiliary magnetic steel of the sound device according to the present invention;
FIG. 10 is a top view of the elastic support assembly and the first auxiliary magnetic steel of the sound device according to the present invention;
FIG. 11 is a sectional view taken along line A-A of FIG. 1;
FIG. 12 is a top view of a partial three-dimensional sound device of the present invention;
fig. 13 is an enlarged view of a portion shown in B of fig. 11.
[ 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. 1-6, the present invention provides a sound generating device 100, which includes a frame 1, a vibration system 2, and a magnetic circuit system 3.
The basin stand 1 is used for supporting the vibration system 2 and the magnetic circuit system 3.
Vibration system 2 is including being fixed in the vibrating diaphragm 21 of basin frame 1, in order to drive the voice coil 22 of vibrating diaphragm 21 vibration sound production and being fixed in basin frame 1 and with vibrating diaphragm 21 is relative and the elastic support subassembly 23 that the interval set up, elastic support subassembly 23 with vibration system 2 connects.
The magnetic circuit system 3 comprises a magnetic yoke 31 fixed on the basin stand 1, a main magnetic steel 32 fixed on the magnetic yoke 31, at least two first auxiliary magnetic steels 33 enclosing the magnetic gap 30 together with the main magnetic steel 32, and an upper clamping plate 34 fixed on and covering the first auxiliary magnetic steels; an accommodating space 20 is formed between the elastic support assembly 23 and the voice coil 22, and the first auxiliary magnetic steel 33 is located in the accommodating space 20; the upper clamping plate 34 includes an annular fixing ring 341 fixed to the basin frame 1, two fixing plates 342 extending from two opposite sides of the fixing ring 341 to the first secondary magnetic steel 33, and two first secondary pole cores 343 connected to the two fixing plates 342 respectively and stacked on the two first secondary magnetic steels 33, and each of the first secondary pole cores 343 and the fixing ring 341 form a gap space 340 at an interval.
In this embodiment, the elastic supporting 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 spaced opposite to the first fixing arm 2311, and an elastic arm 2313 connecting the first fixing arm 2311 and the second fixing arm 2312, and at least a portion of the elastic arm 2313 is located in the gap space 340; specifically, the elastic member 231 includes two second fixing arms 2312 spaced apart from each other and two elastic arms 2313 extending from the first fixing arm 2311 to the two second fixing arms 2312, respectively, and each elastic arm 2313 is at least partially located in the gap space 340. The two elastic arms 2313 are arranged at intervals and are respectively fixed on the fixing plate 342, and at least part of each elastic arm 2313 is positioned in the gap space 340; in the above structure, by setting the gap space 340 to increase more routing space for the elastic arm 2313, the length of the gap space 340 is equivalent to the increased length of the elastic arm 2313, so that the overall length of the elastic arm 2313 is increased, the length of the elastic arm 2313 is increased, that is, the elastic support performance of the elastic support component 23 is enhanced, thereby improving the vibration performance of the vibration system 2 and improving the acoustic performance of the sound generating device 100.
Specifically, the auxiliary diaphragm 232 includes a folding ring 2321 having an arc-shaped cross section, and a first connection portion 2322 and a second connection portion 2323 extending from two opposite sides of the folding ring 2321, where the first connection portion 2322 is fixed to one side of the first fixing arm 2311 away from the diaphragm 21, and each second connection portion 2323 is fixed to one side of the second fixing arm 2312 away from the diaphragm 21, which is on the same side as the first fixing arm, and the folding ring 2321 and the elastic arm 2313 are disposed opposite to each other.
Preferably, the elastic member 231 is a flexible circuit board, and the voice coil 22 is electrically connected to the elastic member 231, so as to provide support for the voice coil 22 on one hand, and introduce an external electrical signal for the voice coil 22 on the other hand, thereby avoiding a problem of easy disconnection when introducing the external electrical signal for the voice coil 22 through a lead wire, and improving reliability thereof.
In addition, a certain accommodating space 20 is formed between the voice coil 22 and the elastic support assembly 23, and each first auxiliary magnetic steel 33 is arranged in the accommodating space 20 between the elastic support assembly 23 and the voice coil 22 on the same side of the first auxiliary magnetic steel, so that a three-magnetic steel or five-magnetic steel structure of the magnetic circuit system 3 can be realized to the maximum extent, the design limitation of the magnetic circuit system 3 is released, the magnetic performance of the magnetic circuit system is excellent, and the acoustic performance of the sound generating device 100 is excellent.
Referring to fig. 3 and fig. 5 to 7, the elastic supporting assembly 23 further includes a supporting frame 4 connected to the elastic member 231, and the supporting frame 4 is connected to the diaphragm 21.
The resilient support members 23 together define a hollow region 230. Further, the number of the elastic support assemblies 23 may be a symmetrical structure formed by two, or a surrounding structure formed by four, for example, in the present embodiment, the elastic support assemblies 23 include two and are respectively disposed on two opposite sides of the voice coil 22 corresponding to the two first secondary magnetic steels 33, taking the voice coil 22 having a rectangular structure as an example for explanation, the two elastic support assemblies 23 are disposed on two sides of the short axis of the voice coil 22 and jointly surround the hollow area 230, one end of the voice coil 22 away from the diaphragm 21 is disposed in the hollow area 230, and the arrangement of the dual elastic support assemblies 23 forms a symmetrical structure, so that the support effect on the voice coil 22 is more stable, and the lateral swing of the voice coil 22 is better prevented.
Referring to fig. 3 and fig. 6 to 10, a first yielding groove 2320 is formed in a concave manner on one side of the auxiliary diaphragm 232 close to the voice coil 22; the first yielding groove 2320 is located in the accommodating space 20, and the first auxiliary magnetic steel 33 extends into the first yielding groove 2320 on the same side. Through the arrangement of the first abdicating groove 2320, the design of the magnetic circuit system 3 is released, so that there is enough space between the elastic support component 23 and the voice coil 22 for placing the first secondary magnetic steel 33, the volume of the first secondary magnetic steel 33 is increased, and the magnetic performance of the magnetic circuit system 3 is optimized on the whole, so that the acoustic performance of the sound production device 100 is excellent.
Preferably, the voice coil 22 has a round rectangular structure, and the two second fixing arms 2312 of each elastic support assembly 23 are respectively located at two adjacent round positions of the voice coil 22; each of said first secondary magnetic steels 33 is located between two of said second fixing arms 2312 of the same one of said elastic supporting members 23; each first pair magnet steel 33's relative both sides are sunken respectively and are formed two second groove 330 of stepping down, two second groove 330 of stepping down respectively with same elastic support component 23 two second fixed arm 2312 sets up relatively, each bullet arm 2313 extends to rather than homonymy in the second groove 330 of stepping down. Through the setting of second groove 330 of stepping down, when guaranteeing first auxiliary magnet steel 33's magnetism nature performance, further for the bullet arm 2313 has increased the line space, makes through further increasing the length of bullet arm 2313 the vibration of elastic support component 23 is more stable promptly, thereby realizes the higher reliability of sound production device 100.
In the above structure, the elastic support component 23 is a symmetrical structure formed by two, and correspondingly, the first secondary magnetic steel 33 also includes two magnetic steels and is disposed at two opposite sides of the main magnetic steel 32 at intervals, and each of the first secondary magnetic steels 33 is located between the elastic support component 23 and the voice coil 22 on the same side as the first secondary magnetic steel 33. At this time, the magnetic circuit system 3 has three magnetic steels, and in practical application, the magnetic circuit system 3 may be set as a three-magnetic-steel magnetic circuit according to the requirement of an optimized design, or the magnetic circuit system 3 may be further optimized as a five-magnetic-steel magnetic circuit.
When the magnetic circuit system 3 is a three-magnetic-steel magnetic circuit, taking the rectangular structure of the voice coil 22 as an example for explanation, the two elastic support assemblies 23 are located on two sides of the short axis of the voice coil 22, and the two first secondary magnetic steels 33 are also located on two sides of the short axis of the voice coil 22. At this time, the three-magnetic steel magnetic circuit structure makes the driving performance of the magnetic circuit system 3 strong, so that the acoustic performance of the sound production device 100 is good.
When the magnetic circuit system 3 is a five-magnet steel magnetic circuit, for example, in the present embodiment, in order to further effectively utilize the space and increase the volume of the magnetic circuit system 3, the magnetic circuit system 3 further includes two second secondary magnets 35 respectively disposed at two opposite sides of the long axis of the main magnet 32 at intervals. At this time, the driving performance of the five-magnetic steel magnetic circuit structure is stronger, so that the vibration effect of the sound production device 100 is better.
In order to further improve the performance of the magnetic circuit system 3, preferably, 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 a main pole core 36 stacked on the main magnetic steel 32, the upper clamp plate 34 further includes two second auxiliary pole cores 344 extending from the fixing ring 341 to the second auxiliary magnetic steel 35, and each of the second auxiliary pole cores 344 is stacked on the second auxiliary magnetic steel 35 on the same side as the second auxiliary magnetic steel 35. By the arrangement of the main pole core 36 and the second auxiliary pole core 344, the magnetic lines of force of the magnetic circuit system 3 are more concentrated, so that the magnetic performance of the magnetic circuit system 3 is better, and the acoustic performance of the sound production device 100 is further improved.
It should be noted that, in addition to the structure of the dual elastic supporting members 23 mentioned in the present embodiment, in order to further optimize the vibration performance of the vibration system 2, the elastic supporting members 23 may also include four elastic supporting members 23 disposed around the voice coil 22, and a rectangular structure in which the voice coil 22 is rounded is taken as an example, where two of the elastic supporting members 23 are located on two sides of the short axis of the voice coil 22, and the other two elastic supporting members 23 are located on two sides of the long axis of the voice coil 22; correspondingly, the first secondary magnetic steels 33 should also include four and be disposed around the main magnetic steel 32, wherein two first secondary magnetic steels 33 are located on two sides of the short axis of the voice coil 22, and the other two first secondary magnetic steels 33 are located on two sides of the long axis of the voice coil 22. By the arrangement of four elastic supporting assemblies 23, the vibration performance of the vibration system 2 can be better improved, so that the acoustic performance of the sound production device 100 is better improved.
Referring to fig. 3, fig. 6 and fig. 11-13, in the above structure, the elastic supporting component 23 is indirectly connected to the vibration system 2, and the elastic supporting component 23 is indirectly connected to the diaphragm 22 through the supporting framework 4; specifically, voice coil 22 fixed connection in vibrating diaphragm 21, support chassis 4 with voice coil 22 interval sets up and fixed connection in vibrating diaphragm 21, its one end of keeping away from vibrating diaphragm 21 with elastic support component 23 connects, support chassis 4 will elastic support component 23 with voice coil 22 links to each other indirectly. Further, the supporting frame 4 is fixed to a side of the second fixing arm 2312 close to the diaphragm 21.
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 component 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 component 23 is effectively avoided, the magnetic circuit system 3 does not need to be shifted to the elastic support component 23, the magnetic circuit system 3 can realize a maximized structure, and the acoustic performance of the sound production device 100 is effectively improved.
Of course, it is also possible that the resilient support member 23 is directly connected to the vibration system 2, i.e. that the resilient support member 23 is fixedly connected directly to the voice coil 22.
Preferably, taking the voice coil 22 as a rectangular structure with round corners as an example for explanation, the number of the support skeletons 4 is four, and the four support skeletons 4 are respectively located at the positions of the four round corners of the voice coil 22. At this time, magnetic steels can be arranged on both sides of the short axis and both sides of the long axis of the voice coil 22, which can be fully used for designing a magnetic steel structure, thereby increasing the volume of the magnetic circuit system 3 to improve the magnetic field performance thereof.
Compared with the prior art, according to the sound-generating device, each first auxiliary pole piece is arranged at a certain distance from the fixed ring and connected to the fixed plate on the same side of the fixed ring, each first auxiliary pole piece is indirectly connected to the fixed ring through the arrangement of the fixed plate, so that the fixed ring and each first auxiliary pole piece have a certain gap space, the elastic support assembly is fixed to the fixed ring and is partially located in the gap space, specifically, the elastic arm portion of the elastic support assembly is accommodated in the gap space, the gap through space increases more wiring space for the elastic arm, the vibration of the elastic support assembly is more stable through increasing the length of the elastic arm, and the reliability of the sound-generating device is further high; in addition, a certain accommodating space is formed between the voice coil and the elastic support assembly, each first auxiliary magnetic steel is positioned in the accommodating space between the elastic support assembly and the voice coil on the same side of the first auxiliary magnetic steel, the magnetic circuit system can realize a maximized three-magnetic-steel or five-magnetic-steel structure, the design limitation of the magnetic circuit system is released, and the acoustic performance of the sound production 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 (8)

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 magnetic circuit system comprises a magnetic yoke fixed on the basin frame, main magnetic steel fixed on the magnetic yoke, four first auxiliary magnetic steels arranged on two opposite sides of the main magnetic steel at intervals and enclosing a magnetic gap with the main magnetic steel, and an upper clamping plate fixed on the basin frame and covering the first auxiliary magnetic steels; the vibration system comprises a vibrating diaphragm fixed on the basin frame, a voice coil inserted in the magnetic gap to drive the vibrating diaphragm to vibrate and sound, and elastic support assemblies fixed on the basin frame and opposite to the vibrating diaphragm and arranged at intervals, wherein the number of the elastic support assemblies is four, the elastic support assemblies are arranged around the voice coil, and the elastic support assemblies are connected with the vibration system; the upper clamping plate comprises an annular fixing ring fixed on the basin frame, two fixing plates extending from two opposite sides of the fixing ring to the first auxiliary magnetic steel, and two first auxiliary pole cores respectively connected to the two fixing plates and stacked on the two first auxiliary magnetic steels, and a gap space is formed between each first auxiliary pole core and the fixing ring; the elastic support assembly comprises an elastic piece, the elastic piece comprises a first fixing arm fixed on the basin frame, a second fixing arm spaced relatively from the first fixing arm and an elastic arm connected with the first fixing arm and the second fixing arm, and the elastic arm is at least partially located in the gap space.
2. The sound production device as claimed in claim 1, wherein the elastic support assembly further comprises an auxiliary diaphragm attached to the elastic member and a support skeleton connected to the elastic member, the support skeleton being connected to the diaphragm.
3. The sound production device of claim 2, wherein a side of the auxiliary diaphragm close to the voice coil is recessed to form a first recess, and the first secondary magnetic steel extends into the first recess.
4. The sounding device according to claim 3, wherein two of the elastic supporting members are disposed on opposite sides of the voice coil corresponding to two of the first secondary magnetic steels, respectively, and the elastic member includes two second fixing arms spaced apart from each other and two elastic arms extending from the first fixing arm to the two second fixing arms, respectively, and each of the elastic arms is at least partially disposed in the gap space.
5. The sounding device according to claim 4, wherein the two resilient support members together define a hollow region, and an end of the voice coil remote from the diaphragm is located within the hollow region.
6. The sounding device according to claim 5, wherein the voice coil is rectangular, the two elastic supporting members are located on two sides of the short axis of the voice coil, and the two first secondary magnetic steels are located on two sides of the short axis of the voice coil.
7. The sounder device according to claim 6, wherein the voice coil is of a rectangular configuration with rounded corners, and the two second fixing arms of each of the resilient support members are located at two adjacent rounded corners of the voice coil.
8. The sounder device according to claim 1, wherein the resilient member is a flexible circuit board.
CN201811640861.0A 2018-12-29 2018-12-29 Sound production device Active CN109862477B (en)

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CN208908487U (en) * 2018-09-30 2019-05-28 瑞声科技(新加坡)有限公司 Microphone device
CN208924469U (en) * 2018-09-30 2019-05-31 瑞声科技(新加坡)有限公司 Microphone device
CN208924475U (en) * 2018-09-30 2019-05-31 瑞声科技(新加坡)有限公司 Microphone device
CN208924470U (en) * 2018-09-30 2019-05-31 瑞声科技(新加坡)有限公司 Microphone device

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