CN114257926B - Sound producing device and electronic equipment - Google Patents
Sound producing device and electronic equipment Download PDFInfo
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- CN114257926B CN114257926B CN202111437956.4A CN202111437956A CN114257926B CN 114257926 B CN114257926 B CN 114257926B CN 202111437956 A CN202111437956 A CN 202111437956A CN 114257926 B CN114257926 B CN 114257926B
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- 239000002184 metal Substances 0.000 claims abstract description 5
- 101001045744 Sus scrofa Hepatocyte nuclear factor 1-beta Proteins 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 230000004907 flux Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 5
- 230000035945 sensitivity Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004984 smart glass Substances 0.000 description 1
- 230000026683 transduction Effects 0.000 description 1
- 238000010361 transduction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
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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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- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Abstract
The invention provides a sound generating device and electronic equipment, wherein the sound generating device comprises a shell made of metal, a vibration system, a magnetic circuit system and a conductive piece; the bottom wall of the shell is provided with a sound outlet, the vibration system and the magnetic circuit are sequentially stacked and fixed on the bottom wall, and the vibration system comprises a vibrating diaphragm and a flat voice coil connected with the vibrating diaphragm; the magnetic circuit system comprises a magnetic yoke, a first magnetic assembly and a second magnetic assembly which are parallel and are arranged on the magnetic yoke at intervals, a magnetic gap is formed at the interval, and the voice coil can be movably inserted into the magnetic gap; the conductive piece is electrically connected with the voice coil and the external circuit and comprises a first part electrically connected with the voice coil, the first part is provided with a first bonding pad fixed on the first magnetic assembly and a second bonding pad fixed on the second magnetic assembly, the magnetic conduction yoke is provided with a notch for exposing the first bonding pad and the third bonding pad, and the wire inlet section and the wire outlet section of the voice coil extend to the notch positions and are respectively electrically connected with the first bonding pad and the second bonding pad; the sounding device has the advantages of small volume, high reliability and better acoustic performance.
Description
Technical Field
The invention belongs to the technical field of electroacoustic transduction, and particularly relates to a sound generating device and electronic equipment.
Background
With the development of light weight and miniaturization of electronic devices, consumers have higher requirements on the electronic devices, and the application fields and environments of the electronic devices are more and more complex. Under the application requirement, the performance of the sounding device is also required to be improved correspondingly to adapt to the requirements of the electronic equipment on performance and structure.
The existing sound production device mostly adopts a moving-coil type loudspeaker, the acoustic performance of the moving-coil type loudspeaker is directly related to the size of the moving-coil type loudspeaker, the larger the size is, the better the acoustic effect is, and the smaller the size is, the worse the acoustic effect is. Because of the portability, comfort and aesthetics, the smart terminals have more stringent requirements on size, and the size and thickness of the smart terminals are becoming smaller, the space left for the speakers to be built in is becoming smaller, and the design space for the internal structural components of the speakers is becoming more limited.
Therefore, there is a need to provide a new sound emitting device that solves the above-mentioned technical problems.
Disclosure of Invention
The invention aims to overcome the technical problems and provide an improved sound generating device and electronic equipment.
In order to solve the technical problems, the invention is realized in such a way that the sound generating device is characterized by comprising a shell, a vibration system, a magnetic circuit system and a conductive piece;
the shell is made of metal, the shell comprises a bottom wall and a side wall bent and extended from the periphery of the bottom wall, the bottom wall is provided with a sound outlet, the vibration system and the magnetic circuit system are sequentially stacked and fixed on the bottom wall,
the vibration system comprises a vibrating diaphragm and a voice coil connected with the vibrating diaphragm, the voice coil is flat, the axial direction of the voice coil is perpendicular to the vibration direction of the vibrating diaphragm, and the voice coil comprises a voice coil body, and an inlet line segment and an outlet line segment which are connected with the voice coil body;
the magnetic circuit system comprises a magnetic yoke, a first magnetic assembly and a second magnetic assembly which are parallel and are arranged on the magnetic yoke at intervals, a magnetic gap is formed between the first magnetic assembly and the second magnetic assembly, and the voice coil is inserted into the magnetic gap;
the voice coil is characterized in that the conductive piece is electrically connected with the voice coil and an external circuit, the conductive piece comprises a first part electrically connected with the voice coil, the first part is provided with a first bonding pad and a second bonding pad, the first bonding pad is fixed on the first magnetic assembly, the second bonding pad is fixed on the second magnetic assembly, the magnetic conduction yoke is provided with a notch for exposing the first bonding pad and the second bonding pad, and the wire inlet section and the wire outlet section extend to the notch positions and are electrically connected to the first bonding pad and the second bonding pad respectively.
Preferably, the inlet line segment and the outlet line segment are wound into a strand in a direction away from the voice coil body and led out to the notch position.
Preferably, a gap is arranged between the first bonding pad and the second bonding pad, and the wire inlet section and the wire outlet section extend along the magnetic gap to pass through the gap and are electrically connected to one sides of the first bonding pad and the second bonding pad, which are away from the magnetic circuit system.
Preferably, the voice coil body includes two opposite long sides and two short sides connecting the two long sides, and the first magnetic assembly and the second magnetic assembly are disposed in parallel with the long sides.
Preferably, the incoming line segment and the outgoing line segment are led out from the position of one of the short sides.
Preferably, the magnetic yoke is fixedly connected with one end of the side wall, which is far away from the bottom wall, and the magnetic yoke and the housing enclose a space for accommodating the vibration system and the magnetic circuit system.
Preferably, the first magnetic assembly comprises a first magnet, a first magnetic conduction plate, a second magnet and a second magnetic conduction plate which are sequentially stacked on the magnetic conduction yoke along the height direction of the sound generating device, and the second magnetic assembly comprises a third magnet, a third magnetic conduction plate, a fourth magnet and a fourth magnetic conduction plate which are sequentially stacked on the magnetic conduction yoke along the height direction of the sound generating device;
the first magnet is arranged opposite to the third magnet, the first magnetic conduction plate is arranged opposite to the third magnetic conduction plate, the second magnet is arranged opposite to the fourth magnet, and the second magnetic conduction plate is arranged opposite to the fourth magnetic conduction plate;
the magnetizing directions of the first magnet, the second magnet, the third magnet and the fourth magnet are parallel to the vibrating direction of the vibrating diaphragm, the magnetizing directions of the first magnet and the second magnet are opposite, the magnetizing directions of the first magnet and the third magnet are opposite, and the magnetizing directions of the third magnet and the fourth magnet are opposite;
the two long sides of the voice coil body are respectively arranged between the first magnetic conduction plate and the third magnetic conduction plate and between the second magnetic conduction plate and the fourth magnetic conduction plate.
Preferably, the conductive member is an FPCB, and the conductive member further includes a second portion electrically connected to an external circuit and an intermediate portion connecting the first portion and the second portion.
Preferably, the notch is formed in one end portion of the magnetic yoke along the extending direction of the first magnetic assembly and the second magnetic assembly, the middle portion extends to the outer side of the housing and extends vertically along the side wall, an avoidance portion for avoiding the middle portion is arranged in the side wall in a recessed mode, and the middle portion is fixed to the avoidance portion.
Preferably, the notch is disposed at one end of the magnetic yoke along the extending direction of the first magnetic assembly and the second magnetic assembly, the middle portion extends along the first magnetic assembly or the second magnetic assembly towards one side surface of the magnetic yoke, and penetrates out between the other end of the magnetic yoke along the extending direction of the first magnetic assembly and the second magnetic assembly and the magnetic circuit system, and the magnetic yoke is provided with a avoidance groove for avoiding the middle portion.
Preferably, the notch is disposed at one end of the magnetic yoke along the extending direction of the first magnetic assembly and the second magnetic assembly, the middle portion extends along the first magnetic assembly or the second magnetic assembly towards one side surface of the magnetic yoke, and penetrates between the magnetic circuit system and a position of the magnetic yoke along the extending direction of the first magnetic assembly and the second magnetic assembly, and the magnetic yoke is provided with a avoidance groove for avoiding the middle portion.
Preferably, the sound generating device further comprises a backing ring, the backing ring is arranged on one side, close to the voice coil, of the vibrating diaphragm, and the backing ring supports the peripheral side of the vibrating diaphragm.
The invention also provides electronic equipment, which comprises a shell and the sounding device.
Compared with the prior art, the sounding device has the beneficial effects that:
the shell of the sounding device is made of metal, so that the shell can be thinner, and the internal space of the sounding device is increased; the vibration system adopts a flat voice coil, the axial direction of the voice coil is perpendicular to the vibration direction of the vibrating diaphragm, the magnetic circuit system adopts a first magnetic assembly and a second magnetic assembly which are parallel and are arranged at intervals, a magnetic gap for the movable insertion of the voice coil is formed, the magnetic flux of the voice coil is increased, and the high-frequency sensitivity of the sounding device is improved; the first bonding pad and the second bonding pad of electrically conductive spare locate first magnetic component and second magnetic component respectively, and the magnetic conduction yoke offers the gap and supplies first bonding pad and third bonding pad to expose, and the welding of voice coil loudspeaker voice coil lead wire of being convenient for is more easy to realize when the inner space of sound production device is narrow and small. The sound generating device can further reduce the width of the sound generating device while improving the acoustic performance, is convenient for more fully utilizing the reserved space of the electronic equipment, and realizes the miniaturization of the sound generating device.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of the overall structure of a sound emitting device according to a first embodiment of the present invention.
Fig. 2 is an exploded view of a sound emitting device according to a first embodiment of the present invention.
Fig. 3 is a schematic exploded view of a part of the structure of a sound emitting device according to a first embodiment of the present invention.
Fig. 4 is a schematic cross-sectional view of another angle of the sound emitting device according to the first embodiment of the present invention.
Fig. 5 is a schematic cross-sectional view of a voice coil of a sound emitting device according to a first embodiment of the present invention.
Fig. 6 is a schematic diagram of the overall structure of a sound emitting device according to a second embodiment of the present invention.
Fig. 7 is a schematic diagram of the overall structure of a sound emitting device according to a third embodiment of the present invention.
Fig. 8 is a schematic view of a part of the structure of a sound emitting device according to a third embodiment of the present invention.
Fig. 9 is a schematic structural diagram of a magnetic yoke of a sound emitting device according to a third embodiment of the present invention.
Reference numerals illustrate:
the achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present invention, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
The invention provides a sound generating device 100, as shown in fig. 1-9, comprising a shell 10, a vibration system 20, a magnetic circuit system 30 and a conductive piece 40, wherein the shell 10 is made of metal materials, the shell 10 comprises a bottom wall 11 and a side wall 12 bent and extended from the periphery of the bottom wall 11, the bottom wall 11 is provided with a sound outlet 111, and the vibration system 20 and the magnetic circuit are sequentially stacked and fixed on the bottom wall 11; compared with plastic or other materials, the shell 10 can be made thinner, so that the internal space of the sound generating device 100 is increased or when the internal space of the sound generating device 100 is fixed, the reserved space of the electronic equipment occupied by the sound generating device 100 is reduced;
the vibration system 20 comprises a vibrating diaphragm 21 and a voice coil 22, wherein the voice coil 22 is flat, the voice coil 22 is connected with the vibrating diaphragm 21, the axial direction of the voice coil 22 is perpendicular to the vibration direction of the vibrating diaphragm 21, and the voice coil 22 comprises a voice coil body 221, and an inlet segment 222 and an outlet segment 223 which are connected with the voice coil body 221; the flat voice coil 22 is adopted, so that the height space of the sound generating device 100 is saved, and the thickness of the sound generating device 100 is convenient to thin;
the magnetic circuit system 30 comprises a magnetic yoke 33, a first magnetic assembly 31 and a second magnetic assembly 32, wherein the first magnetic assembly 31 and the second magnetic assembly 32 are parallel and are arranged on the magnetic yoke 33 at intervals, a magnetic gap 34 is formed between the first magnetic assembly 31 and the second magnetic assembly 32, and the voice coil 22 is inserted into the magnetic gap 34; the first magnetic component 31 and the second magnetic component 32 are arranged in parallel and at intervals, so that the magnetic flux of the voice coil 22 can be increased, and the high-frequency sensitivity of the sound generating device 100 is improved; meanwhile, the width of the sound generating device 100 is further reduced, so that the narrower sound generating device 100 is convenient to realize;
the conductive member 40 is electrically connected with the voice coil 22 and the external circuit, the conductive member 40 includes a first portion 41 electrically connected with the voice coil 22, a first bonding pad 411 and a second bonding pad 412 are disposed on the first portion 41, the first bonding pad 411 and the second bonding pad 412 are respectively fixed on the first magnetic assembly 31 and the second magnetic assembly 32, meanwhile, a notch 331 for exposing the first bonding pad 411 and the second bonding pad 412 is formed in the magnetic yoke 33, and the wire inlet section 222 and the wire outlet section 223 extend to the position of the notch 331 and are respectively electrically connected with the first bonding pad 411 and the second bonding pad 412. The first bonding pad 411 and the second bonding pad 412 are respectively disposed on the first magnetic assembly 31 and the second magnetic assembly 32, are exposed out of the magnetic yoke 33, and are respectively electrically connected with the inlet segment 222 and the outlet segment 223 of the voice coil 22, so that in the narrow sound emitting device 100, when the internal space is smaller, the process implementation is facilitated.
Fig. 4 and 5 show that the incoming line segment 222 and the outgoing line segment 223 of the voice coil 22 are wound in a strand in a direction away from the voice coil body 221, and are connected to the first pad 411 and the second pad 412, respectively, at the position of the notch 331. In this scheme, the income line segment 222 of voice coil loudspeaker voice coil 22 and the section of being qualified for next round of competitions 223 twine into a strand and draw forth, in actual assembly, use a in order line needle can, avoided two line segments alone in order the technical problem that the space is not enough when line, when the inner space of sound production device 100 is narrower, this scheme is realized more easily.
Further, a gap (not shown) is provided between the first pad 411 and the second pad 412, and the incoming line segment 222 and the outgoing line segment 223 of the voice coil 22 extend along the magnetic gap 34, pass through the gap, and are electrically connected to a side of the first pad 411 and the second pad 412 facing away from the magnetic circuit system 30, respectively. The incoming line segment 222 and the outgoing line segment 223 are respectively fixed towards two sides after being led out from the magnetic gap 34 to the opening position, the lead is led out to be shorter, the internal space of the sounding device 100 is occupied less, the line following space of the lead is reserved at the opening position, the design is more flexible, the opening is communicated with the magnetic gap 34, and the internal airflow of the sounding device 100 circulates more smoothly.
As shown in fig. 2 to 4, the voice coil body 221 includes two opposite long sides and two short sides connecting the two long sides, and the first magnetic assembly 31 and the second magnetic assembly 32 are disposed parallel to and extend from the long sides. In this scheme, first magnetic assembly 31 and second magnetic assembly 32 and the long limit parallel extension setting of voice coil loudspeaker voice coil 22 can increase the magnetic flux on the long limit of voice coil loudspeaker voice coil 22, promote the high frequency sensitivity of sound generating device 100, promote sound generating device's acoustic performance.
As shown in fig. 5, the inlet segment 222 and the outlet segment 223 of the voice coil 22 are led out from the position of one of the short sides. The incoming line segment 222 and the outgoing line segment 223 are positioned on the same short side of the voice coil body 221, so that the winding process is convenient to realize, the incoming line segment 222 and the outgoing line segment 223 are conveniently wound into a strand to be led out, the forward line is shorter, the process is simple, and the internal space of the sounding device 100 is occupied less.
In this embodiment, the magnetic yoke 33 is fixedly connected to one end of the side wall 12 of the housing 10 far from the bottom wall 11, and encloses a housing space with the housing 10, so as to house the vibration system 20 and the magnetic circuit system 30. The magnetic yoke 33 is opposite to the bottom wall 11 of the housing 10 and encloses a containing space with the housing 10, so that the internal structure of the sound emitting device 100 is more compact, and the miniaturization of the sound emitting device 100 is facilitated.
As shown in fig. 3, the first magnetic assembly 31 includes a first magnet 311, a first magnetic conductive plate 312, a second magnet 313, and a second magnetic conductive plate 314 sequentially stacked on the magnetic conductive yoke 33 in the height direction (i.e., the vertical direction) of the sound emitting device 100, and the second magnetic assembly 32 includes a third magnet 321, a third magnetic conductive plate 322, a fourth magnet 323, and a fourth magnetic conductive plate 324 sequentially stacked on the magnetic conductive yoke 33 in the height direction of the sound emitting device 100; the first magnetic assembly 31 and the second magnetic assembly 32 are respectively provided with two groups of spaced magnetic conductive plates, the two groups of spaced magnetic conductive plates are respectively positioned on the two groups of spaced magnets, the magnetic fluxes of the two opposite long sides of the voice coil 22 in the magnetic gaps are respectively increased, the high-frequency sensitivity of the sound generating device 100 is improved, and the acoustic performance of the sound generating device 100 is further improved.
More specifically, the first magnet 311 is disposed opposite to the third magnet 321, the first magnetic conductive plate 312 is disposed opposite to the third magnetic conductive plate 322, the second magnet 313 is disposed opposite to the fourth magnet 323, and the second magnetic conductive plate 314 is disposed opposite to the fourth magnetic conductive plate 324; in practical use, the first magnet 311 and the third magnet 321 may be selected to have the same size, the first magnetic conductive plate 312 and the third magnetic conductive plate 322 are selected to have the same size, the second magnet 313 and the fourth magnet 323 are selected to have the same size, and the second magnetic conductive plate 314 and the fourth magnetic conductive plate 324 are selected to have the same size. The first magnet 311, the second magnet 313, the third magnet 321, and the fourth magnet 323 may be provided with the same standard size, and the first magnetic conductive plate 312, the second magnetic conductive plate 314, the third magnetic conductive plate 322, and the fourth magnetic conductive plate 324 may be provided with the same standard size, as required. The setting mode is flexible and changeable, and the actual use needs are met. The four magnets and the four magnetic conduction plates are arranged oppositely, so that the magnetic field distribution is more uniform, and a more balanced magnetic field is provided for the vibration process of the voice coil 22.
As shown in fig. 3, the magnetizing directions of the first magnet 311, the second magnet 313, the third magnet 321, and the fourth magnet 323 are parallel to the vibration direction of the diaphragm 21, the magnetizing directions of the first magnet 311 and the second magnet 313 are opposite, the magnetizing directions of the first magnet 311 and the third magnet 321 are opposite, the magnetizing directions of the third magnet 321 and the fourth magnet 323 are opposite, the magnetizing directions of the second magnet 313 and the fourth magnet 323 are opposite, and the two long sides of the voice coil body are respectively disposed between the first magnetic conductive plate 312 and the third magnetic conductive plate 322, and between the second magnetic conductive plate 314 and the fourth magnetic conductive plate 324. The magnetic flux at the long side of the upper end of the voice coil 22 mainly comes from the second magnet 313 and the fourth magnet 323 which are oppositely arranged, and the magnetic flux at the long side of the lower end of the voice coil 22 mainly comes from the second magnet 313 and the fourth magnet 323 which are oppositely arranged, and the first magnet 311 and the third magnet 321 which are oppositely arranged, so that the voice coil 22 passes enough magnetic flux when vibrating in the vertical direction, the high-frequency sensitivity of the sound generating device 100 is further improved, and the acoustic performance of the sound generating device 100 is improved.
It will be appreciated that the outer edge of the first magnetic assembly 31 is flush with the outer edge of the magnetic yoke 33, and the outer edge of the second magnetic assembly 32 is flush with the outer edge of the magnetic yoke 33, so that the magnetic circuit system 30 is more attractive in appearance, and more fully utilizes the inner space of the sound emitting device 100 and more effectively increases the magnetic field strength.
When the magnetic circuit system 30 is assembled, the first magnetic assembly 31 and the second magnetic assembly 32 may be assembled separately, and then the two sets of magnetic assemblies are fixed to the magnetic yoke 33. The first magnetic assembly 31 and the second magnetic assembly 32 may be partially assembled, and the remaining assembly may be performed after the assembly is mounted on the magnetic yoke 33. Specifically, the first magnet 311 and the first magnetic conductive plate 312 are assembled, the third magnet 321 and the third magnetic conductive plate 322 are assembled, and then the two assembled components are assembled to the magnetic conductive yoke 33, at this time, the assembly of the first part is completed; next, the second magnet 313 and the second magnetic conductive plate 314, the fourth magnet 323 and the fourth magnetic conductive plate 324 are assembled, respectively, in the same manner, and the remaining components are further assembled to the first part, completing the assembly of the magnetic circuit system 30. The installation mode is simple and various and the production efficiency is high.
The conductive member 40 is an FPCB, and as shown in fig. 6 to 9, the conductive member 40 further includes a second portion 43 electrically connected to an external circuit and an intermediate portion 42 connecting the first portion 41 and the second portion 43. The electrical connection between the voice coil 22 and the external circuit is achieved through the conductive member 40, and the structure is simple and easy to achieve.
As shown in fig. 6, the notch 331 is provided at one end portion of the yoke 33 in the extending direction of the first magnetic assembly 31 and the second magnetic assembly 32, the intermediate portion 42 extends along the first magnetic assembly 31 or the second magnetic assembly 32 toward one side surface of the yoke 33, the intermediate portion 42 extends outside the housing 10, and extends vertically along the side wall 12 of the housing 10. Correspondingly, the side wall 12 is concavely provided with a relief portion 121 for relieving the middle portion 42, and the middle portion 42 is fixed to the relief portion 121. It can be appreciated that the middle portion 42 of the conductive element 40 does not protrude from the surface of the side wall 12, the appearance of the sounding device is more attractive, and the conductive element 40 does not occupy the space of the electronic device additionally; the middle part 42 is fixed on the side wall 12, so that the connection of the conductive piece 40 is more stable and the installation reliability is higher; further, the avoiding portion 121 and the side wall 12 are integrally formed, so that the process is simple, and the structural strength is high. In this embodiment, the other side of the magnetic yoke 33 is also symmetrically provided with a notch 331, so that the airflow on both sides of the sound generating device 100 is more balanced, and the vibration of the diaphragm 21 is more balanced.
The middle portion 42 of the conductive member 40 may be drawn in various manners in consideration of different electronic devices to provide different spaces for the sound emitting device 100. As shown in fig. 6 to 9, the intermediate portion 42 may pass through between the other end portion of the magnetic yoke 33 in the extending direction of the first magnetic assembly 31 and the second magnetic assembly 32 and the magnetic circuit system 30, and the magnetic yoke 33 is provided with a recess 332 for avoiding the intermediate portion 42.
Alternatively, the intermediate portion 42 may also be penetrated (not shown) from a position between both end portions of the yoke 33 in the extending direction of the first magnetic assembly 31 and the second magnetic assembly 32, and the yoke 33 may be provided with a recess 332 for avoiding the intermediate portion 42.
The arrangement of the conductive element 40 in the sound generating device 100 can have various forms, and can be more flexibly adapted to different electronic devices.
The sound generating device 100 further includes a backing ring 50, where the backing ring 50 may be made of metal or plastic. The backing ring 50 is disposed on one side of the diaphragm 21 near the voice coil 22, and is supported on the peripheral side of the diaphragm 21. In actual installation, the backing ring 50 and the diaphragm 21 may be assembled, so that the diaphragm 21 may be further installed in the housing 10, or the diaphragm 21 may be installed in the housing 10 first, and then the backing ring 50 may be installed. The backing ring 50 plays a role in supporting and fixing the diaphragm 21, and improves the mounting reliability of the diaphragm 21. Further, the other side of the backing ring 50 can be abutted against the first magnetic assembly 31 and the second magnetic assembly 32, so as to support the magnetic circuit system 30, and further improve the installation reliability of the magnetic circuit system 30.
The invention also provides an electronic device, which comprises an electronic device shell and the sound generating device 100 accommodated in the shell. The specific structure of the sound emitting device 100 in the electronic device refers to the above embodiments, and since the electronic device adopts all the technical solutions of all the embodiments, at least the sound emitting device has all the beneficial effects brought by the technical solutions of the embodiments, which are not described in detail herein. The electronic device may be a computer, a mobile phone, a tablet, a smart watch, smart glasses, etc.
The foregoing description of the preferred embodiments of the present invention should not be construed as limiting the scope of the invention, but rather should be understood to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the following description and drawings or any application directly or indirectly to other relevant art(s).
Claims (13)
1. The sound generating device is characterized by comprising a shell, a vibration system, a magnetic circuit system and a conductive piece;
the shell is made of metal, the shell comprises a bottom wall and a side wall bent and extended from the periphery of the bottom wall, the bottom wall is provided with a sound outlet, the vibration system and the magnetic circuit system are sequentially stacked and fixed on the bottom wall,
the vibration system comprises a vibrating diaphragm and a voice coil connected with the vibrating diaphragm, the voice coil is flat, the axial direction of the voice coil is perpendicular to the vibration direction of the vibrating diaphragm, and the voice coil comprises a voice coil body, and an inlet line segment and an outlet line segment which are connected with the voice coil body;
the magnetic circuit system comprises a magnetic yoke, a first magnetic assembly and a second magnetic assembly which are parallel and are arranged on the magnetic yoke at intervals, a magnetic gap is formed between the first magnetic assembly and the second magnetic assembly, and the voice coil is inserted into the magnetic gap;
the voice coil is characterized in that the conductive piece is electrically connected with the voice coil and an external circuit, the conductive piece comprises a first part electrically connected with the voice coil, the first part is provided with a first bonding pad and a second bonding pad, the first bonding pad is fixed on the first magnetic assembly, the second bonding pad is fixed on the second magnetic assembly, the magnetic conductive yoke is provided with a notch for exposing the first bonding pad and the second bonding pad, the notch is arranged at one end part of the magnetic conductive yoke along the extending direction of the first magnetic assembly and the second magnetic assembly, and the wire inlet section and the wire outlet section extend to the notch positions and are electrically connected to the first bonding pad and the second bonding pad respectively.
2. The sound emitting device of claim 1, wherein the inlet segment and the outlet segment are wound in a strand leading out to the notch position in a direction away from the voice coil body.
3. The sound generating device of claim 1, wherein a gap is provided between the first bonding pad and the second bonding pad, and the incoming line segment and the outgoing line segment extend along the magnetic gap through the gap to be electrically connected to a side of the first bonding pad and the second bonding pad facing away from the magnetic circuit system.
4. The sound emitting device of claim 1, wherein the voice coil body comprises two opposing long sides and two short sides connecting the two long sides, and the first magnetic assembly and the second magnetic assembly extend parallel to the long sides.
5. The sound emitting device of claim 4, wherein the inlet segment and the outlet segment are directed from the location of one of the short sides.
6. The sound generating device set forth in claim 1, wherein the magnetically permeable yoke is fixedly connected to an end of the side wall remote from the bottom wall, and the magnetically permeable yoke and the housing enclose a space for accommodating the vibration system and the magnetic circuit system.
7. The sound generating device of claim 4, wherein the first magnetic assembly comprises a first magnet, a first magnetic conductive plate, a second magnet and a second magnetic conductive plate sequentially stacked on the magnetic conductive yoke along a height direction of the sound generating device, and the second magnetic assembly comprises a third magnet, a third magnetic conductive plate, a fourth magnet and a fourth magnetic conductive plate sequentially stacked on the magnetic conductive yoke along the height direction of the sound generating device;
the first magnet is arranged opposite to the third magnet, the first magnetic conduction plate is arranged opposite to the third magnetic conduction plate, the second magnet is arranged opposite to the fourth magnet, and the second magnetic conduction plate is arranged opposite to the fourth magnetic conduction plate;
the magnetizing directions of the first magnet, the second magnet, the third magnet and the fourth magnet are parallel to the vibrating direction of the vibrating diaphragm, the magnetizing directions of the first magnet and the second magnet are opposite, the magnetizing directions of the first magnet and the third magnet are opposite, and the magnetizing directions of the third magnet and the fourth magnet are opposite;
the two long sides of the voice coil body are respectively arranged between the first magnetic conduction plate and the third magnetic conduction plate and between the second magnetic conduction plate and the fourth magnetic conduction plate.
8. The sound emitting device of claim 1, wherein the conductive member is an FPCB, the conductive member further comprising a second portion electrically connected to an external circuit and an intermediate portion connecting the first portion and the second portion.
9. The sound emitting device of claim 8, wherein the intermediate portion extends outside the housing and vertically along the side wall, the side wall is concavely provided with a relief portion that is relieved from the intermediate portion, and the intermediate portion is fixed to the relief portion.
10. The sound generating device as claimed in claim 8, wherein the intermediate portion extends along one side surface of the first magnetic assembly or the second magnetic assembly toward the magnetically conductive yoke, and passes out from between the other end portion of the magnetically conductive yoke along the extending direction of the first magnetic assembly and the second magnetic assembly and the magnetic circuit system, and the magnetically conductive yoke is provided with a recess for avoiding the intermediate portion.
11. The sound emitting device of claim 8, wherein the middle portion extends along one side surface of the first magnetic assembly or the second magnetic assembly toward the magnetically conductive yoke, and passes between the magnetic circuit system and a position of the magnetically conductive yoke between both ends in the extending direction of the first magnetic assembly and the second magnetic assembly, and the magnetically conductive yoke is provided with a recess for avoiding the middle portion.
12. The sound generating device of any one of claims 1 to 11, further comprising a backing ring disposed on a side of the diaphragm adjacent to the voice coil, the backing ring supporting a peripheral side of the diaphragm.
13. An electronic device comprising a housing and the sound emitting device according to any one of claims 1 to 12 housed in the housing.
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| CN202111437956.4A CN114257926B (en) | 2021-11-30 | 2021-11-30 | Sound producing device and electronic equipment |
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| CN202111437956.4A CN114257926B (en) | 2021-11-30 | 2021-11-30 | Sound producing device and electronic equipment |
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| CN114257926A CN114257926A (en) | 2022-03-29 |
| CN114257926B true CN114257926B (en) | 2024-01-02 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116055960B (en) * | 2022-06-27 | 2023-10-27 | 荣耀终端有限公司 | Kernel of speaker module, speaker module and electronic equipment |
| CN115119115B (en) * | 2022-07-26 | 2023-02-07 | 歌尔股份有限公司 | Sound generating device and electronic equipment |
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