CN111641905A - Sound production device - Google Patents
Sound production device Download PDFInfo
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- CN111641905A CN111641905A CN202010546683.6A CN202010546683A CN111641905A CN 111641905 A CN111641905 A CN 111641905A CN 202010546683 A CN202010546683 A CN 202010546683A CN 111641905 A CN111641905 A CN 111641905A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/02—Details
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/02—Details
- H04R9/025—Magnetic circuit
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/02—Details
- H04R9/04—Construction, mounting, or centering of coil
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/06—Loudspeakers
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- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Abstract
The invention discloses a sounding device, which comprises a basin frame, a vibration system and a magnetic circuit system with a magnetic gap, wherein the basin frame is provided with a plurality of through holes; the vibration system comprises a vibrating diaphragm fixed on the basin frame and a voice coil inserted in the magnetic gap and driving the vibrating diaphragm to vibrate and sound; the magnetic circuit system comprises a magnetic yoke, main magnetic steel and first edge magnetic steel surrounding the main magnetic steel and forming a magnetic gap with the main magnetic steel at intervals, the sound production device further comprises an elastic part fixed on the basin frame and elastically supporting the voice coil, the first edge magnetic steel is right opposite to one side of the elastic part, the elastic part is sunken to form a yielding groove, the orthographic projection part of the elastic part to the first edge magnetic steel along the vibration direction of the vibrating diaphragm is located in the yielding groove, and the yielding groove provides a yielding space for the vibration of the elastic part. Compared with the prior art, the sound production device has good acoustic performance and high assembly efficiency.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the field of electroacoustic conversion, in particular to a sounding device applied to a portable electronic product.
[ background of the invention ]
With the advent of the mobile internet age, the number of smart mobile devices is increasing. Among the mobile devices, the mobile phone is undoubtedly the most common and portable mobile terminal device. At present, the functions of mobile phones are very diverse, one of them is a high-quality music function, and therefore, a sound generating device for playing sound is widely applied to the current smart mobile devices.
The sound production device in the related art comprises a basin frame, a vibration system 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 vibration diaphragm fixed on the basin frame, a voice coil fixed on the vibration diaphragm and inserted in the magnetic gap to drive the vibration diaphragm to vibrate and produce sound, and an elastic support component, one end of the elastic support component is fixed on the basin frame, and the other end of the elastic support component is fixed at one end of the voice coil, which is far away from the vibration diaphragm; the magnetic circuit system comprises a magnetic yoke, main magnetic steel fixed on the magnetic yoke and side magnetic steel surrounding the main magnetic steel and forming the magnetic gap with the main magnetic steel at intervals.
However, in the sound generating device in the related art, the diaphragm and the elastic support assembly are respectively fixed to two opposite ends of the voice coil, and although the elastic support assembly can effectively prevent the voice coil from swinging transversely when vibrating, the elastic support assembly limits the volume of the side magnetic steel of the magnetic circuit system, and the whole width of the side magnetic steel is narrow, so that the improvement of the acoustic performance of the sound generating device is limited; or, in order to minimize the volume of the side magnetic steel, the sound production device in the related art utilizes two parts of magnetic steel to bypass the elastic support component to splice to form the side magnetic steel, but in the design, because the two parts of magnetic steel have the problem of polar phase splitting, the gluing is difficult during splicing, and the assembly efficiency is low.
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 overcome the technical problems and provide a sound production device with good acoustic performance and high assembly efficiency.
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, 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 and a voice coil inserted in the magnetic gap and driving the vibrating diaphragm to vibrate and sound, and the magnetic circuit system comprises a magnetic yoke, main magnetic steel fixed on the magnetic yoke and first side magnetic steel surrounding the main magnetic steel and forming the magnetic gap with the main magnetic steel at an interval; the sounding device also comprises an elastic part which is fixed on the basin frame and elastically supports the voice coil;
the first edge magnetic steel is right opposite to one side of the elastic part is sunken to form a yielding groove, the elastic part is arranged in the yielding groove along the vibration direction of the vibrating diaphragm to the orthographic projection part of the first edge magnetic steel, and the yielding groove provides a yielding space for the vibration of the elastic part.
Preferably, the elastic part comprises a first fixing arm fixed on the frame, a second fixing arm fixed on one end of the voice coil far away from the diaphragm, and an elastic arm connecting the first fixing arm and the second fixing arm; the first side magnetic steel comprises a first groove wall part which surrounds the abdicating groove, a second groove wall part which is opposite to the first groove wall part, and a groove bottom part which connects the first groove wall part and the second groove wall part; first cell wall portion is fixed in first fixed arm, second cell wall portion with the main magnet steel forms relatively the magnetic gap, the bullet arm is located directly over the tank bottom, the bullet arm is followed the vibration direction to the orthographic projection of tank bottom is located completely in the tank bottom, the groove of stepping down does the vibration of bullet arm provides the space of stepping down.
Preferably, the first groove wall portion, the second groove wall portion, and the groove bottom portion are integrally molded.
Preferably, a gap between the elastic arm and the first groove wall portion in the direction perpendicular to the vibration direction and a gap between the elastic arm and the second groove wall portion in the direction perpendicular to the vibration direction are not greater than 2 mm.
Preferably, the first edge magnetic steels are arranged to be two and are respectively located on two opposite sides of the main magnetic steel, the elastic pieces are arranged to be two and are respectively arranged opposite to the first edge magnetic steels, each elastic piece comprises two second fixed arms, and the second groove wall portion is located opposite to the second groove wall portion and between the two second fixed arms of the elastic piece.
Preferably, the magnetic circuit system further includes two second side magnetic steels respectively disposed at two opposite sides of the main magnetic steel at intervals, and each of the second side magnetic steels is located between the two elastic members.
Preferably, the voice coil is of a rectangular structure with round corners, the first edge magnetic steels are located on two opposite sides of a short shaft of the voice coil, the second edge magnetic steels are located on two opposite sides of a long shaft of the voice coil, the elastic pieces are located on two opposite sides of the short shaft of the voice coil, and the second fixing arm is located at the round corner of the voice coil.
Preferably, each the elastic component still is equipped with two auxiliary vibrating diaphragms, two auxiliary vibrating diaphragms are located respectively with this the elastic component sets up relatively the relative both ends of first edge magnet steel, auxiliary vibrating diaphragm including roll over ring portion and by two fixed parts that the relative both sides of roll over ring portion extended, two the fixed part pastes respectively and locates first fixed arm with the second fixed arm, roll over ring portion with the bullet arm is just to just setting up at the interval.
Preferably, the magnetic circuit system further comprises an upper clamping plate, the upper clamping plate comprises an annular fixing ring fixed on the basin frame and four pole cores extending from the fixing ring to the first edge magnetic steel and the second edge magnetic steel respectively, the four pole cores are respectively stacked on the first edge magnetic steel and the second edge magnetic steel, and the pole cores are respectively matched with the corresponding first edge magnetic steel or the second edge magnetic steel in shape.
Preferably, the elastic member is a flexible circuit board, and the voice coil is electrically connected to the elastic member.
Compared with the prior art, in the sound production device, one side of the first edge magnetic steel, which is close to the vibrating diaphragm, is sunken to form the abdicating groove, the abdicating groove extends along the length direction of the first edge magnetic steel, and the first fixed wall of the elastic part is positioned between the first side magnetic steel and the vibrating diaphragm, the elastic arm is positioned in the abdicating groove completely along the vibration direction of the vibrating diaphragm to the orthographic projection of the first side magnetic steel, after the structure is arranged, the width of the first side magnetic steel extends from the magnetic gap in the prior art to the elastic arm, the magnetic gap is optimized in the invention, the magnetic gap extends to the basin frame, the elastic arm is provided with a vibration space only through the abdicating groove, the width of the first side magnetic steel is effectively increased, the first side magnetic steel is maximized, the sensitivity of the sounding device is improved by 0.3dB, the acoustic performance of the sounding device is effectively improved, and the first edge magnetic steel gets rid of the limitation of the elastic part on the space of the sounding device to a certain extent; in addition, because the first side magnetic steel is of an integral structure and is not spliced, the influence caused by phase repulsion force in splicing is avoided, the assembling process is simplified, and the assembling efficiency 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 a schematic perspective view of a sound device according to the present invention;
FIG. 2 is an exploded perspective view of a sound device according to the present invention;
FIG. 3 is a sectional view taken along line A-A of FIG. 1;
FIG. 4 is an enlarged view of the portion indicated by B in FIG. 3;
FIG. 5 is a schematic structural diagram of a first side magnetic steel of the sound device according to the present invention;
fig. 6 is a schematic view of an assembly structure of the elastic member, the frame, the voice coil, and the first side magnetic steel and the second side magnetic steel of the sound generating device of the present invention.
Fig. 7 is another view of fig. 6.
[ 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 7, the sound production device 100 of the present invention includes a frame 1, a vibration system 2, a magnetic circuit system 3, and an elastic member 4.
The basin stand 1 is used for supporting the vibration system 2 and the magnetic circuit system 3, and the magnetic circuit system 3 is provided with a magnetic gap 30.
The vibration system 2 comprises a diaphragm 21 fixed on the frame 1 and a voice coil 22 inserted in the magnetic gap 30 and driving the diaphragm to vibrate and sound.
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, and a first side magnetic steel 33 surrounding the main magnetic steel 32 and forming the magnetic gap 30 with the main magnetic steel 32 at an interval.
The first side magnetic steel 33 is opposite to one side of the elastic element 4 and is sunken to form a yielding groove 330. In this embodiment, the relief groove 330 extends in the longitudinal direction of the first side magnetic steel 33.
In this embodiment, specifically, the first side magnetic steels 33 are provided in two and located at two opposite sides of the main magnetic steel 32, respectively, so as to form a three-magnetic-circuit structure.
In order to further increase the driving force of the magnetic circuit system 3, in the present embodiment, the magnetic circuit system 3 further includes two second side magnetic steels 34 respectively disposed at two opposite sides of the main magnetic steel 32 at intervals, so as to form a five-magnetic-circuit structure. Of course, it is understood that the first side magnetic steel 33 and the second side magnetic steel 34 are spaced apart from the main magnetic steel 32 to jointly enclose the magnetic gap 30.
Further, the magnetic circuit system 3 further includes an upper clamp plate 35, the upper clamp plate 35 includes an annular fixing ring 351 fixed to the frame 1 and four pole cores 352 respectively extending from the fixing ring 351 to the first side magnetic steel 33 and the second side magnetic steel 34, the four pole cores 352 are respectively stacked on the first side magnetic steel 33 and the second side magnetic steel 34, and the pole cores 352 are respectively matched with the corresponding first side magnetic steel 33 or the second side magnetic steel 34 in shape. The upper clamping plate 35 is used for conducting magnetism and preventing magnetic leakage, and further improves the driving force of the magnetic circuit system 3.
The elastic member 4 is fixed to the frame 1 and elastically supports the voice coil 22. The elastic component 4 is located in the yielding groove 330 in the direction of vibration of the diaphragm 21 toward the orthographic projection part of the first side magnetic steel 33, so that the yielding groove 330 provides a yielding space for the vibration of the elastic component 4. The structure does not influence the vibration of the elastic part 4, and simultaneously utilizes redundant space as much as possible to arrange the first side magnetic steel 33, thereby effectively improving the volume of the magnetic circuit system 3 and increasing the driving performance.
In this embodiment, the elastic member 4 includes a first fixing arm 41 fixed to the frame 1, a second fixing arm 42 connected to the vibration system 2, and an elastic arm 43 connecting the first fixing arm 41 and the second fixing arm 42.
The first side magnetic steel 33 includes a first groove wall portion 331 surrounding the relief groove 330, a second groove wall portion 332 opposing the first groove wall portion 331, and a groove bottom portion 333 connecting the first groove wall portion 331 and the second groove wall portion 332. In the present embodiment, the first groove wall 331, the second groove wall 332, and the groove bottom 333 are integrally molded, so that the structural strength is improved and the number of assembly processes is reduced. First fixed arm 41 is located first side magnet steel 33 with between the vibrating diaphragm 21, first groove wall portion 331 is fixed in first fixed arm 41, second groove wall portion 332 with main magnet steel 32 forms relatively magnetic gap 30, it is located to play arm 43 directly over tank bottom 333, is close to one side of vibrating diaphragm 21 promptly, it follows to play arm 43 the vibration direction of vibrating diaphragm 21 to the orthographic projection of tank bottom 333 is located completely the within range of tank bottom 333, promptly the groove of stepping down 330 does the vibration of playing arm 43 steps down and provides its vibration space.
Preferably, a gap between the elastic arm 43 and the first groove wall 331 in the direction perpendicular to the vibration direction and a gap between the elastic arm 43 and the second groove wall 332 in the direction perpendicular to the vibration direction are not greater than 2 mm. This structure can increase the volume of the effective magnetic path portion of the first side magnetic steel 33 as much as possible, and further improve the driving performance.
The design of the first side magnetic steel 33 and the elastic part 4 ensures that in the sound production device 100 of the present invention, the width of the first side magnetic steel 33 is extended from the magnetic gap 30 in the prior art to the elastic arm 43, and is optimized in the present invention, the width of the first side magnetic steel 33 is extended from the magnetic gap 30 to the basin frame 1, and the yielding slot 330 provides a vibration space for the elastic arm 43, so that mutual interference with the elastic part 4 is avoided, the width of the first side magnetic steel 33 is effectively increased, the volume of the first side magnetic steel 33 is maximized, further the sensitivity of the sound production device 100 is improved, the acoustic performance of the sound production device 100 is effectively improved, and the first side magnetic steel 33 gets rid of the limitation of the elastic part 4 to the space to a certain extent, and the design freedom is improved; in addition, because the first side magnetic steel 33 is an integral structure rather than a plurality of magnetic steels, the influence caused by the mutual repulsion of the magnetic steels in the splicing process is avoided, the assembling process is simplified, and the assembling efficiency is improved.
It should be noted that the width of the first edge magnetic steel 33 refers to the dimension from the side close to the voice coil 22 to the side close to the frame 1 in the direction perpendicular to the vibration direction.
In the present embodiment, two elastic members 4 are provided as an example to explain in detail:
Each of the elastic members 4 includes two second fixing arms 42, and the second groove wall portion 332 of the first edge magnetic steel 33 is located between the two second fixing arms 42 of the elastic member 4 opposite to the first edge magnetic steel, so that the unused space of the elastic member 4 is further fully utilized, and the width and volume of the first edge magnetic steel 33 are effectively increased.
Preferably, in this embodiment, the voice coil 22 is a rectangular structure with rounded corners, the two first side magnetic steels 33 are located on two opposite sides of the short axis of the voice coil 22, the two second side magnetic steels 34 are located on two opposite sides of the long axis of the voice coil 22, the two elastic members 4 are located on two opposite sides of the short axis of the voice coil 22, and then the four second fixing arms 42 of the two elastic members 4 are located at the rounded corners of the voice coil 22. At this time, in the magnetic circuit system 3 of the five-magnetic steel structure, since the first side magnetic steel 33 needs to form the receding groove 330, when the first side magnetic steel is disposed on the short axis side of the voice coil 22, the space where the receding groove 330 is formed is smaller than the space occupied by the receding groove 330 formed on the long axis side, at this time, both sides of the long axis of the voice coil 22 can be sufficiently used for designing the structure of the second side magnetic steel 34, so as to further increase the overall volume of the magnetic circuit system 3 to improve the magnetic field performance thereof, enhance the driving force, and further improve the sensitivity of the sound generating device 100. In this embodiment, the first side magnetic steel 33 and the elastic member 4 are configured to improve the sensitivity of the sound generating device 100 by about 0.3 dB. Similarly, if the second side magnetic steel 34 is omitted to form the three-magnetic-circuit structure, the first side magnetic steel 33 is disposed on the short-axis side of the voice coil 22, so that the above technical effect is also obtained, that is, the sensitivity of the sound generating device 100 is improved by about 0.3dB compared to the three-magnetic-steel structure in the prior art.
After the elastic member 4 is connected to the vibration system 2 through the second fixing arm 42, on one hand, the elastic member is used for supporting the vibration system 2 to improve the vibration performance of the vibration system 2, and at the same time, the transverse swing of the voice coil 22 during vibration, i.e., the swing in the direction perpendicular to the vibration direction, can be suppressed, thereby improving the acoustic performance of the sound generating device 100.
The connection mode of the second fixing arm 42 and the vibration system 2 is various, and the second fixing arm may be directly connected to the diaphragm 21 or the voice coil 22, or may be connected to the diaphragm through another structure.
Specifically, the frame 23 includes a frame main body 231 having a ring shape and a frame connecting portion 232 extending outward from the frame main body 231.
The bobbin body 231 is located between the diaphragm 21 and the voice coil 22, and suspends the voice coil 22 below the diaphragm 21.
In this embodiment, preferably, an orthographic projection of the bobbin main body 231 along the vibration direction of the diaphragm 21 falls on the voice coil 22. This structure the structural design of skeleton main part 231 has effectually solved voice coil 22 with excessive glue influences during the gluing of vibrating diaphragm 21 the problem of vibrating space of vibrating diaphragm 21 for voice coil 22 winding displacement is more concentrated, and acoustic performance is more excellent.
It should be noted that, an orthographic projection of the bobbin main body 231 along the vibration direction of the diaphragm 21 falls on the voice coil 22, and the bobbin main body 231 and the voice coil 22 are at least partially overlapped. The range of the bobbin body 231 is larger than the range of the voice coil 22, that is, the range extends beyond the voice coil 22, and the range of the bobbin body 231 is smaller than the range of the voice coil 22; of course, the two ranges may be equal. Preferably, the range of the bobbin body 231 is smaller than the range of the voice coil 22.
The bobbin connecting portion 232 is attached to the outer side of the voice coil 22 and extends toward the elastic member 4, and the bobbin connecting portion 232 is fixedly connected to the second fixing arm 42.
In this embodiment, the number of the bobbin connecting portions 232 corresponds to the second fixing arm 42, that is, the bobbin connecting portions 232 include four and are respectively located at four round corners of the voice coil 22, and the four bobbin connecting portions 232 are respectively fixedly connected to the four second fixing arms 42. The quantity and the position of above-mentioned structure, can effectual improvement elastic component 4 support equilibrium and the fastness to vibration system 2, and then improve the stability of sound production device 100 vibration sound production.
In this embodiment, the frame body 231 is annular, including a continuous ring, which is an integral structure; discontinuous ring shapes are also included, i.e., the skeletal body 231 may be a plurality of segments of spaced and co-enclosing ring shapes. The purpose is primarily to connect at least two of the skeleton connection portions 232. The structure of the plurality of skeleton connecting portions 232 can avoid the mutual interference between the skeleton connecting portions and the magnetic circuit system 3 to a greater extent, that is, the magnetic circuit system 3 can be designed to utilize more sufficient space, and the vibration performance is improved.
Preferably, the framework connecting portion 232 includes a top wall 2321 and a bottom wall 2322 which are oppositely disposed, and a side wall 2323 which connects the top wall 2321 and the bottom wall 2322, and the top wall 2321 and the bottom wall 2322 are respectively located on two opposite sides of the side wall 2323.
The top wall 2321 is connected to the bobbin body 231 and is also connected to one side of the voice coil 22 close to the diaphragm 21, the bottom wall 2322 is fixedly connected to the second fixing arm 42, and the side wall 2323 is connected to an outer side surface of the voice coil 22.
In the above structure, the elastic element 4 is connected to the vibration system 2 through the skeleton 23, rather than being directly connected to the voice coil 22, and the indirect connection structure on one hand realizes effective suppression of the lateral oscillation of the voice coil 22 through the elastic element 4, and improves the reliability and stability of the sound generating device 100, and on the other hand, the elastic element 4 is not directly connected to the voice coil 22, so that the structural design of the voice coil 22 is released, the position of the voice coil 22 can float up and down along the vibration direction of the diaphragm 21, and the height of the voice coil 22 is no longer limited by the elastic element 4, so that the overall height of the sound generating device 100 can be designed to be lighter and thinner; meanwhile, the structural design of the magnetic circuit system 3 is released, the elastic part 4 is not directly glued with the voice coil 22, the interference between the magnetic circuit system 3 and the elastic part 4 is effectively avoided, the magnetic circuit system 3 can realize a maximized structure, and the acoustic performance of the sound production device 100 is effectively improved.
In order to further improve the vibration system of the vibration system 2 and suppress the lateral vibration thereof, in the present embodiment, each of the elastic members 4 further includes two auxiliary diaphragms 44. The two auxiliary diaphragms 44 are respectively located at two opposite ends of the first edge magnetic steel 33 opposite to the elastic member 4.
Specifically, the auxiliary diaphragm 44 includes a folded ring portion 441 and two fixing portions 442a and 442b extending from two opposite sides of the folded ring portion 441, the two fixing portions 442a and 442b are respectively attached to the first fixing arm 41 and the second fixing arm 42, and the folded ring portion 441 is opposite to the elastic arm 43 and is disposed at an interval.
In this embodiment, preferably, the elastic member 4 is a flexible circuit board, and the voice coil 22 is electrically connected to the elastic member 4. So far, elastic component 4 has not only realized improving vibration system vibration performance, has restrained vibration lateral swing effect outside, still is used for providing outside signal of telecommunication for voice coil 22, and the back is connected with elastic component 4 electricity to the lead wire 221 of voice coil 22, is connected with external power supply through elastic component 4, can effectually avoid voice coil 22 at the risk of its lead wire 221 broken string of vibration in-process.
Compared with the prior art, in the sound production device, one side of the first edge magnetic steel, which is close to the vibrating diaphragm, is sunken to form the abdicating groove, the abdicating groove extends along the length direction of the first edge magnetic steel, and the first fixed wall of the elastic part is positioned between the first side magnetic steel and the vibrating diaphragm, the elastic arm is positioned in the abdicating groove completely along the vibration direction of the vibrating diaphragm to the orthographic projection of the first side magnetic steel, after the structure is arranged, the width of the first side magnetic steel extends from the magnetic gap in the prior art to the elastic arm, the magnetic gap is optimized in the invention, the magnetic gap extends to the basin frame, the elastic arm is provided with a vibration space only through the abdicating groove, the width of the first side magnetic steel is effectively increased, the first side magnetic steel is maximized, the sensitivity of the sounding device is improved by 0.3dB, the acoustic performance of the sounding device is effectively improved, and the first edge magnetic steel gets rid of the limitation of the elastic part on the space of the sounding device to a certain extent; in addition, because the first side magnetic steel is of an integral structure and is not spliced, the influence caused by phase repulsion force in splicing is avoided, the assembling process is simplified, and the assembling efficiency is improved.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A sounding device comprises a basin frame, a vibration system and a magnetic circuit system, wherein the vibration system and the magnetic circuit system are respectively fixed on the basin frame; the vibration system comprises a vibrating diaphragm fixed on the basin frame and a voice coil inserted in the magnetic gap and driving the vibrating diaphragm to vibrate and sound; the magnetic circuit system comprises a magnetic yoke, main magnetic steel fixed on the magnetic yoke, first side magnetic steel surrounding the main magnetic steel and forming the magnetic gap with the main magnetic steel at intervals, the sound production device also comprises an elastic piece fixed on the basin frame and elastically supporting the voice coil, and the magnetic circuit system is characterized in that,
the first edge magnetic steel is right opposite to one side of the elastic part is sunken to form a yielding groove, the elastic part is arranged in the yielding groove along the vibration direction of the vibrating diaphragm to the orthographic projection part of the first edge magnetic steel, and the yielding groove provides a yielding space for the vibration of the elastic part.
2. The sounding device according to claim 1, wherein the elastic member comprises a first fixing arm fixed to the frame, a second fixing arm fixed to an end of the voice coil away from the diaphragm, and a spring arm connecting the first fixing arm and the second fixing arm;
the first side magnetic steel comprises a first groove wall part which surrounds the abdicating groove, a second groove wall part which is opposite to the first groove wall part, and a groove bottom part which connects the first groove wall part and the second groove wall part;
first cell wall portion is fixed in first fixed arm, second cell wall portion with the main magnet steel forms relatively the magnetic gap, the bullet arm is located directly over the tank bottom, the bullet arm is followed the vibration direction to the orthographic projection of tank bottom is located completely in the tank bottom, the groove of stepping down does the vibration of bullet arm provides the space of stepping down.
3. The sounder device according to claim 2, wherein the first slot wall portion, the second slot wall portion, and the slot bottom are integrally formed.
4. The sounder device according to claim 2, wherein a gap between the resilient arm and the first slot wall portion in a direction perpendicular to the direction of vibration and a gap between the resilient arm and the second slot wall portion in a direction perpendicular to the direction of vibration are each no greater than 2 mm.
5. The sound production device as claimed in claim 2, wherein two first side magnets are disposed on opposite sides of the main magnet, and two elastic members are disposed on opposite sides of the main magnet, each elastic member includes two second fixing arms, and the second groove wall portion is disposed between the two second fixing arms of the elastic member opposite to the second groove wall portion.
6. The sounding device as claimed in claim 5, wherein the magnetic circuit system further comprises two second side magnetic steels spaced apart from each other on opposite sides of the main magnetic steel, each of the second side magnetic steels being located between two of the elastic members.
7. The device of claim 6, wherein the voice coil is a rectangular structure with rounded corners, two of the first side magnets are located on opposite sides of the short axis of the voice coil, two of the second side magnets are located on opposite sides of the long axis of the voice coil, two of the elastic members are located on opposite sides of the short axis of the voice coil, and the second fixing arm is located at the rounded corner of the voice coil.
8. The sounding device according to claim 5, wherein each of the elastic members further comprises two auxiliary diaphragms, the two auxiliary diaphragms are respectively disposed at two opposite ends of the first side magnetic steel opposite to the elastic member, the auxiliary diaphragms comprise a folded ring portion and two fixing portions extending from two opposite sides of the folded ring portion, the two fixing portions are respectively attached to the first fixing arm and the second fixing arm, and the folded ring portion is opposite to the elastic arm and spaced apart from the elastic arm.
9. The sounding device according to claim 7, wherein the magnetic circuit system further comprises a top plate, the top plate comprises a ring-shaped fixing ring fixed to the frame and four pole cores extending from the fixing ring to the first side magnetic steel and the second side magnetic steel respectively, the four pole cores are stacked on the first side magnetic steel and the second side magnetic steel respectively, and the pole cores are matched with the corresponding first side magnetic steel or the second side magnetic steel respectively in shape.
10. The sounder device according to claim 1, wherein the spring is a flexible circuit board, and the voice coil is electrically connected to the spring.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010546683.6A CN111641905A (en) | 2020-06-15 | 2020-06-15 | Sound production device |
| PCT/CN2020/101270 WO2021253534A1 (en) | 2020-06-15 | 2020-07-10 | Sound production device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010546683.6A CN111641905A (en) | 2020-06-15 | 2020-06-15 | Sound production device |
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| CN111641905A true CN111641905A (en) | 2020-09-08 |
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| CN202010546683.6A Withdrawn CN111641905A (en) | 2020-06-15 | 2020-06-15 | Sound production device |
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| CN (1) | CN111641905A (en) |
| WO (1) | WO2021253534A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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|---|---|
| WO2021253534A1 (en) | 2021-12-23 |
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