WO2022166385A1 - Appareil de production de son et écouteur - Google Patents

Appareil de production de son et écouteur Download PDF

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Publication number
WO2022166385A1
WO2022166385A1 PCT/CN2021/136350 CN2021136350W WO2022166385A1 WO 2022166385 A1 WO2022166385 A1 WO 2022166385A1 CN 2021136350 W CN2021136350 W CN 2021136350W WO 2022166385 A1 WO2022166385 A1 WO 2022166385A1
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WO
WIPO (PCT)
Prior art keywords
magnetic
bass
diaphragm
tweeter
magnetic circuit
Prior art date
Application number
PCT/CN2021/136350
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English (en)
Chinese (zh)
Inventor
郭晓冬
王苗苗
王莹
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歌尔股份有限公司
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Publication of WO2022166385A1 publication Critical patent/WO2022166385A1/fr

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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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
    • H04R1/1058—Manufacture or assembly
    • H04R1/1075—Mountings of transducers in earphones or headphones
    • 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
    • H04R9/045—Mounting
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2201/00—Details of transducers, loudspeakers or microphones covered by H04R1/00 but not provided for in any of its subgroups
    • H04R2201/10—Details of earpieces, attachments therefor, earphones or monophonic headphones covered by H04R1/10 but not provided for in any of its subgroups
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2209/00—Details of transducers of the moving-coil, moving-strip, or moving-wire type covered by H04R9/00 but not provided for in any of its subgroups
    • H04R2209/024—Manufacturing aspects of the magnetic circuit of loudspeaker or microphone transducers

Definitions

  • the present invention relates to the technical field of electro-acoustic conversion, in particular to a sound-generating device and an earphone.
  • the sound-generating device of conventional earphones generally only contains one vibration unit.
  • This kind of structure design is relatively simple, but it cannot take into account the performance and sound quality of the product in different frequency bands at high frequency and low frequency.
  • the sound quality is poor, and some earphones have low frequency.
  • the performance is better, and some are better at high frequency.
  • the sound-generating device of the dual-vibration unit can satisfy the simultaneous operation of low frequency and high frequency, and has a complementary and improved effect on the performance curve of the product and the sound quality of listening.
  • the existing dual-vibration unit sound generating device generally adopts an external stacking type, that is, the tweeter unit and the woofer unit are in the same or opposite direction, occupying a large space, low utilization rate of magnetic circuit, and slightly insufficient bandwidth and sound quality.
  • the main purpose of the present invention is to provide a sound-generating device and an earphone, aiming at solving the technical problem that the existing sound-generating device that can satisfy both high frequency and low frequency effects takes up a large space.
  • the sound-emitting device includes:
  • a tweeter unit the tweeter unit is fixed with the housing and is located in the housing, the tweeter unit includes a magnetic conductive housing, a magnetic conductive diaphragm and a tweeter magnetic circuit system arranged in the magnetic conductive housing, so The magnetic conductive diaphragm is suspended in the tweeter magnetic circuit system, and the tweeter magnetic circuit system is used to generate an alternating electromagnetic field to drive the magnetic conductive diaphragm to vibrate;
  • a bass unit the bass unit is fixed to the casing and located in the casing, the bass unit includes a bass magnetic circuit assembly, a bass diaphragm and a bass voice coil connected to the bass diaphragm, the bass magnetic circuit
  • a bass magnetic gap for inserting the bass voice coil is formed between the assembly and the magnetic conductive housing, and the bass unit and the tweeter unit are coaxially arranged.
  • the high-pitched magnetic circuit system includes two relatively spaced high-pitched magnetic circuit assemblies, the magnetic conductive diaphragm is suspended between the two high-pitched magnetic circuit assemblies, and the high-pitched magnetic circuit assembly includes a sticker.
  • a first magnetic steel and a coil arranged around the first magnetic steel are arranged on the magnetic conductive housing.
  • the outer shell includes a front cover, a middle shell and a rear cover that are connected in sequence, the magnetic conductive shell is fixed to the front cover, and the second magnetic steel is respectively connected to the front cover and the middle shell. Fixed, the bass diaphragm is fixed on the back cover.
  • the magnetic conductive shell includes a first magnetic conductive shell and a second magnetic conductive shell that are combined with each other, the first magnetic conductive shell is fixed with the front cover, and the magnetic conductive diaphragm is arranged on the Between the first magnetic conductive shell and the second magnetic conductive shell, the two tweeter magnetic circuit assemblies are respectively arranged in the space surrounded by the first magnetic conductive shell and the magnetic conductive diaphragm, and the In the space surrounded by the two magnetic conductive shells and the magnetic conductive diaphragm.
  • the first magnetically conductive shell includes a top wall and a first side wall extending from the top wall
  • the second magnetically conductive shell includes a bottom wall and a second sidewall extending from the bottom wall
  • the first side wall and the second side wall are combined with each other to form a magnetically conductive side wall
  • the bass magnetic gap is formed between the magnetic conductive side wall and the second magnetic steel
  • the two high-pitched magnetic circuits The first magnetic steel of one of the tweeter magnetic circuit assemblies is set on the top wall and forms a first gap with the first side wall, and the first magnet steel of the other tweeter magnetic circuit assembly is set.
  • a second gap is formed between the bottom wall and the second side wall, and the two coils are respectively disposed in the first gap and the second gap.
  • the front cover is provided with a through hole
  • the top wall includes a wall body and a first step recessed from the edge of the wall body to the direction of the magnetic conductive diaphragm, the front cover is formed along the The part of the outer periphery of the through hole is clamped on the first step, so that the wall body is exposed to the through hole, and the first magnetic steel is provided with an air flow channel with an opening facing the magnetic conductive diaphragm, so The top wall is provided with a high-pitched sound outlet that communicates with the airflow channel.
  • the front cover is provided with a bass sound outlet that communicates with the bass magnetic gap.
  • the bass unit further includes a centering support piece, and the centering support piece is respectively fixed with the bass diaphragm and the middle shell.
  • the bass magnetic circuit assembly includes a second magnetic steel and a washer fixed to the second magnetic steel, and the second magnetic steel is fixed to the housing.
  • a second step and a third step are formed on the inner side of the middle shell, the second magnetic steel is sandwiched between the front cover and the second step, and the bass unit further includes a washer. , the washer is sandwiched between the second step and the third step.
  • the rear cover includes a bottom cover portion and a side cover portion circumferentially surrounding the bottom cover portion
  • the woofer further includes a passive radiation membrane located between the bass diaphragm and the bottom cover portion, The passive radiation film is arranged corresponding to the bass diaphragm, and the edge of the passive radiation film is fixed on the fourth step formed by the side cover part.
  • the present invention also provides an earphone, the earphone includes the sound producing device as described above.
  • the tweeter unit includes a magnetically conductive housing, a magnetically conductive diaphragm and a high-pitched magnetic circuit system arranged in the magnetically conductive housing,
  • the magnetic conductive diaphragm is suspended in the high-pitched magnetic circuit system, so that an alternating electromagnetic field can be generated by controlling the high-frequency magnetic circuit system.
  • the connected voice coil makes only the magnetic conductive diaphragm vibrate, the vibration components to be driven by the high-pitched magnetic circuit system have small mass, and the sound-electric conversion efficiency is high.
  • the bass unit includes a bass magnetic circuit assembly, a bass diaphragm, and a bass voice coil connected to the bass diaphragm, a bass magnetic gap for inserting the bass voice coil is formed between the bass magnetic circuit assembly and the magnetic conductive shell, and the bass unit and
  • the tweeter is coaxially arranged, and the tweeter is embedded in the woofer, which directly replaces the central magnetic circuit part of the woofer. While providing magnetic flux, the height of the entire sounding device is reduced, the space occupied by the sounding device in the earphone is reduced, and the magnetic circuit efficiency.
  • FIG. 1 is a schematic cross-sectional structural diagram of a sound generating device according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram of a disassembled structure of a sounding device according to an embodiment of the present invention
  • FIG. 3 is a schematic cross-sectional structural diagram of a tweeter unit of a sound generating device according to an embodiment of the present invention
  • FIG. 4 is an exploded schematic diagram of a tweeter unit of a sound generating device according to an embodiment of the present invention.
  • Fig. 5 is a partial schematic diagram of the sound generating device of Fig. 1;
  • FIG. 6 is a schematic diagram of force analysis when the coil of the tweeter unit of the sounding device is not energized according to an embodiment of the present invention
  • FIG. 7 is a schematic diagram of force analysis when the coil of the tweeter unit of the sounding device is energized according to an embodiment of the present invention.
  • the present invention provides a sound generating device 10, including:
  • the tweeter unit 30 is fixed with the housing 20 and is located in the housing 20.
  • the tweeter unit 30 includes a magnetic conductive housing 31, a magnetic conductive diaphragm 37 and a tweeter magnetic circuit system 32 arranged in the magnetic conductive housing 31.
  • the magnetic diaphragm 37 is suspended in the tweeter magnetic circuit system 32, and the tweeter magnetic circuit system 32 is used to generate an alternating electromagnetic field to drive the magnetic conductive diaphragm 37 to vibrate;
  • the bass unit 40 is fixed with the casing 20 and located in the casing 20.
  • the bass unit 40 includes a bass magnetic circuit assembly, a bass diaphragm 42 and a bass voice coil 43 connected to the bass diaphragm 42.
  • the bass magnetic circuit assembly and the magnetic conductivity A bass magnetic gap 47 into which the bass voice coil 43 is inserted is formed between the casings 31 , and the bass unit 40 and the tweeter unit 30 are coaxially arranged.
  • the tweeter unit 30 of the present invention there is no voice coil connected to the magnetic conductive diaphragm 37, which is different from the conventional voice coil driving the diaphragm.
  • the tweeter magnetic circuit system 32 can generate an alternating electromagnetic field, and the magnetic conductive diaphragm 37 Vibration and sound are produced directly under the action of the alternating electromagnetic field, that is, vibration and sound are produced in the vibration space formed by the high-pitched magnetic circuit system 32 .
  • the magnetic conductive diaphragm 37 moves.
  • the tweeter unit 30 and the bass unit 40 are located on the same axis, the bass magnetic circuit assembly of the bass unit 40 is located outside the magnetic conductive housing 31 , and the bass magnetic circuit assembly is spaced from the magnetic conductive housing 31 to form a bass magnetic gap 47 , the lower end of the bass voice coil 43 is fixed with the bass diaphragm 42, the bass voice coil 43 is suspended in the bass magnetic gap 47, and the bass voice coil 43 vibrates after being energized, thereby driving the bass diaphragm 42 to vibrate and sound.
  • the present invention takes into account the full-band sound quality of bass and treble, and has a better sense of hearing.
  • the bass unit 40 and the tweeter unit 30 are coaxially arranged, and the tweeter unit 30 is embedded in the bass unit 40 as a whole, directly replacing the central magnetic circuit part of the bass unit 40. , which not only takes into account the high frequency and low frequency performance of the sounding device 10, but also improves the magnetic circuit efficiency while providing the magnetic flux, and reduces the overall height of the sounding device 10 and reduces the space occupied by the sounding device 10 in the earphone.
  • the tweeter magnetic circuit system 32 includes two tweeter magnetic circuit assemblies 33 arranged at opposite intervals, and the magnetic conductive diaphragm 37 is suspended between the two tweeter magnetic circuit assemblies 33 .
  • the circuit assembly 33 includes a first magnetic steel 331 attached to the magnetic conductive housing 31 and a coil 332 arranged around the first magnetic steel 331 .
  • the coil 332 is spaced from the magnetic conductive diaphragm 37 .
  • the two tweeter magnetic circuit assemblies 33 interact to generate an alternating electromagnetic field, and the magnetic conductive diaphragm 37 is directly under the action of the alternating electromagnetic field, along the two tweeter magnetic circuits.
  • the direction of the connection line of the components 33 moves, that is, the vibration and sound are generated in the vibration space formed between the two high-frequency magnetic circuit components 33 .
  • only the magnetic conductive diaphragm 37 moves, and the coil 332 and the first magnetic steel 331 in the magnetic circuit system 32 may not move.
  • the magnetic conductive diaphragm 37 is only affected by the magnetic field generated by the first magnetic steel 331 located on both sides. size, shape, size, etc., so that the magnetic conductive diaphragm 373 can remain stationary at a preset position in the vibration space.
  • the present invention arranges the coil 332 around the first magnetic steel 331, so that in the magnetic field generated by the magnetic circuit system 32, the magnetic field strength in the central area is higher than that of the magnetic field generated by the magnetic circuit system 32.
  • the strength of the magnetic field in the edge region is greater, and when the coil 332 is energized, the magnetic flux change experienced by the central region of the magnetic conductive diaphragm 37 is greater than the magnetic flux change experienced by the edge region of the magnetic conductive diaphragm 37, that is, the center of the magnetic conductive diaphragm 37.
  • the driving force received by the region is greater than the driving force received by the edge region of the magnetic conductive diaphragm 37, so that the magnetic conductive diaphragm 37 is more likely to be affected by the alternating electromagnetic field to generate sound and vibrate.
  • the first magnetic steel 331, the coil 332 and the balance diaphragm are coaxially arranged to facilitate vibration balance.
  • the high-pitched magnetic circuit system 32 can generate an alternating electromagnetic field by controlling the energization of the coil 332, and the magnetic-conducting diaphragm 37 is in the alternating current state.
  • the variable electromagnetic field Under the action of the variable electromagnetic field, it can vibrate in the vibration space, and the voice coil connected with the diaphragm is omitted, so that only the magnetic conductive diaphragm 37 vibrates, the vibration components to be driven by the high-pitched magnetic circuit system 32 are of small quality, and the sound-electric conversion efficiency is high;
  • the coil 332 by arranging the coil 332 around the first magnetic steel 331 , the driving force generated in the central region of the magnetic conductive diaphragm 37 is larger, which is beneficial to the magnetic conductive diaphragm 37 to vibrate.
  • the magnetization directions of the first magnetic steels 331 of the two tweeter magnetic circuit assemblies 33 are the same, and the current directions of the coils 332 of the two tweeter magnetic circuit assemblies 33 are opposite.
  • the magnetic conductive diaphragm 37 can be suspended between the two first magnetic steels 331 in a balanced manner because the magnetic force direction of the magnetic conductive diaphragm 37 is opposite to that of the two first magnetic steels 331 .
  • the coil 332 When the current direction of the coil 332 above and below the magnetic conductive diaphragm 37 is opposite, the coil 332 generates an alternating electromagnetic field, and the magnetic conductive diaphragm 37 vibrates in the up and down direction under the action of the alternating electromagnetic field, so that the current in the coil 332 can be controlled by controlling the current.
  • the magnetic conductive diaphragm 37 vibrates and emits sound.
  • FIG. 6 is a force analysis diagram of the magnetic conductive diaphragm 37 in an embodiment when the coil 332 is not energized
  • FIG. 7 is a magnetic conductive vibration in an embodiment when the coil 332 is energized Force analysis diagram of membrane 37.
  • the first magnetic steel 331 located above the magnetically conductive diaphragm 37 and the first magnetic steel 331 located below the magnetically conductive diaphragm 37 are both N-pole at the upper end and S-pole at the lower end, namely The magnetization direction of the first magnetic steel 331 is the same, and the direction shown by the magnetic field line goes out from the N pole and enters the S pole. Since the magnetic conductive diaphragm 37 is subjected to opposite directions of the magnetic forces of the two first magnetic steels 331 , the magnetic conductive diaphragm 37 can be suspended between the two first magnetic steels 331 in a balanced manner.
  • the first magnetic steel 331 located above the magnetic conductive diaphragm 37 and the first magnetic steel 331 located below the magnetic conductive diaphragm 37 are both N-pole at the upper end and S-pole at the lower end.
  • the current direction of the coil 332 located outside the upper first magnet 331 is left in and right out, and the current direction of the coil 332 located outside the lower first magnet 331 is right in and left out, that is, two coils 332's current flow is in the opposite direction.
  • Ampere's law it is determined that the upper end of the coil 332 above the magnetic conductive diaphragm 37 is S pole and the lower end is N level, and the coil 332 located below the magnetic conductive diaphragm 37 is determined.
  • the opposite sides of the magnetic conductive diaphragm 37 are magnetized by the upper first magnetic steel 331 and the lower first magnetic steel 331 to generate polarities.
  • the upper side of the magnetic conductive diaphragm 37 is the N pole, and the lower side is the S pole;
  • the lower end is the N pole and the upper side of the magnetic conductive diaphragm 37 repels the same sex, and the upper end of the lower coil 332 is the N pole and the lower side of the magnetic conductive diaphragm 37 attracts the opposite sex, so that the magnetic conductive diaphragm 37 is in the two superimposed forces.
  • the downward deformation generates vibration, thereby further improving the electro-acoustic conversion efficiency of the sound generating device 10 .
  • the direction of the magnetic flux generated by the current of the upper coil 332 is opposite to the direction of the magnetic flux generated by the upper first magnetic steel 331 , which is a negative direction.
  • the magnetic flux produced by steel 331 has the same direction, which is negative.
  • the magnetic conductive diaphragm 37 receives the magnetic flux ⁇ 1 of the upper tweeter magnetic circuit assembly 33 ⁇ the magnetic flux ⁇ 2 of the magnetic conductive diaphragm 37 received from the lower tweeter magnetic circuit assembly 33 .
  • the electromagnetic force F ⁇ pushes the magnetic conductive diaphragm 37 to move toward the lower treble magnetic circuit assembly 33 .
  • the current direction of the coil 332 above and below the magnetic conductive diaphragm 37 is the opposite direction as shown in FIG.
  • the magnetic conductive diaphragm 37 is subjected to the magnetic flux of the upper tweeter magnetic circuit assembly 33 ⁇ 1 ′>magnetic conductive
  • the electromagnetic force generated by the tweeter magnetic circuit assembly 33 pushes the magnetic conductive diaphragm 37 to move toward the upper tweeter magnetic circuit assembly 33 , so that the magnetic conductive diaphragm 37 can be controlled to vibrate and produce sound by controlling the current in the coil 332 .
  • the bass magnetic circuit assembly includes a second magnetic steel 41 and a washer 45 fixed to the second magnetic steel 41 .
  • the second magnetic steel 41 is fixed to the housing 20
  • a bass magnetic gap 47 is formed between the washer 45 and the magnetic conductive housing 31 .
  • the housing 20 includes a front cover 21 , a middle case 22 and a rear cover 23 connected in sequence
  • the magnetically conductive housing 31 is fixed to the front cover 21
  • the second magnetic steel 41 is respectively connected to the front cover 21 .
  • the cover 21 and the middle case 22 are fixed
  • the bass diaphragm 42 is fixed to the rear cover 23 .
  • the middle shell 22 is located at the side of the sound generating device 10 and is used to connect the front cover 21 and the rear cover 23 and can fix the second magnet 41 of the woofer 40.
  • the front cover 21 is used to fix the second magnet 41 of the woofer 40 and
  • the tweeter unit 30 and the back cover 23 are used to fix the vibration system of the bass unit 40 .
  • the arrangement of the front cover 21 enables the tweeter unit 30 to be embedded in the woofer unit 40 , the structure is compact, and the occupied space of the sound generating device 10 is reduced.
  • the magnetic conductive shell 31 includes a first magnetic conductive shell 311 and a second magnetic conductive shell 312 that are assembled with each other.
  • the first magnetic conductive shell 311 is fixed to the front cover 21 , and the magnetic vibration is conductive.
  • the membrane 37 is arranged between the first magnetic conductive shell 311 and the second magnetic conductive shell 312, the two high-pitched magnetic circuit components 33 are respectively arranged in the space surrounded by the first magnetic conductive shell 311 and the magnetic conductive diaphragm 37, and the second In the space surrounded by the magnetic conductive shell 312 and the magnetic conductive diaphragm 37 .
  • the first magnetic conductive shell 311 is located on the upper side of the second magnetic conductive shell 312 , the upper end of the first magnetic conductive shell 311 is fixed to the front cover 21 , and the rest is suspended inside the housing 20 .
  • the sides of the first magnetic conductive shell 311 and the second magnetic conductive shell 312 are spaced apart from the first magnetic steel 331 respectively.
  • the first magnetic steel 331 can be a ring-shaped structure that is sleeved on the outside of the tweeter unit 30 at intervals, adding a bass unit. 40 magnetic flux.
  • the first magnetically conductive shell 311 includes a top wall 3111 and a first side wall 3112 extending from the top wall 3111
  • the second magnetically conductive shell 312 includes a bottom wall 3121 and a second sidewall 3122 extending from the bottom wall 3121.
  • the first side wall 3112 and the second side wall 3122 are joined together to form a magnetically conductive side wall, and a bass magnetic gap 47 is formed between the magnetic conductive side wall and the second magnetic steel 41 ;
  • the first magnetic steel 331 of the tweeter is arranged on the top wall 3111 and forms a first gap with the first side wall 3112, and the first magnetic steel 331 of the other tweeter magnetic circuit assembly 33 is arranged on the bottom wall 3121 and is connected with the second side
  • a second gap is formed between the walls 3122, and the two coils 332 are respectively disposed in the first gap and the second gap.
  • the first side wall 3112, a coil 332 and a first magnet 331 are successively sleeved, and the second side wall 3122, another coil 332 and another first magnet 331 are sleeved successively.
  • the first magnetic steel 331 can be directly attached to the top wall 3111 or the bottom wall 3121, while the coil 332 can be wound on the first magnetic steel 331, or can be pre-wound and attached to the top wall 3111 or the bottom wall 3121 .
  • the components of the tweeter magnetic circuit assembly 33 are set in sequence, thereby effectively reducing the size of the tweeter unit 30 of the sound producing device 10 .
  • the first side wall 3112 and the second side wall 3122 respectively fix the magnetic conductive diaphragm 37 from opposite sides of the magnetic conductive diaphragm 37, that is, the edge of the magnetic conductive diaphragm 37 can be fixed by glue, welding, etc. It is arranged at the end of the first side wall 3112 or the second side wall 3122 , and then the first magnetic conductive shell 311 and the second magnetic conductive shell 312 are matched to cover and fixed, so as to facilitate product assembly.
  • the magnetic conductive diaphragm 37 is directly fixed by the first magnetic conductive shell 311 and the second magnetic conductive shell 312, no other fixing components are provided between the magnetic conductive diaphragm 37 and the tweeter magnetic circuit assembly 33.
  • the magnetic conductive diaphragm 37 and The magnetic field distribution between the tweeter magnetic circuit components 33 is not affected by other fixed components, which is beneficial to improve the conversion efficiency of sound and electricity.
  • the front cover 21 is provided with a through hole 211
  • the top wall 3111 includes a wall body 3113 and a first step 3114 recessed from the edge of the wall body 3113 to the direction of the magnetic vibration film 37 , the front cover 21 is along the outer circumference of the through hole 211 . Part of it is clamped on the first step 3114, so that the wall body 3113 is exposed to the through hole 211, the first magnetic steel 331 is provided with an air flow channel 35 with an opening facing the magnetic conductive diaphragm 37, and the top wall 3111 is provided with a communicating air flow channel 35 The treble sound hole 36.
  • the first step 3114 facilitates the assembly between the front cover 21 and the tweeter unit 30.
  • the arrangement of the through hole 211 can expose the tweeter sound hole 36.
  • the magnetic conductive diaphragm 37 is in the magnetic conductive housing. 31, the airflow pushed by the magnetic conductive diaphragm 37 can be transmitted to the outside through the airflow channel 35 and the high-pitched sound outlet 36.
  • the bottom wall 3121 is provided with a first vent hole 38 corresponding to the airflow channel 35 , and the treble sound outlet 36 , the airflow channel 35 and the bass sound hole 38 are located on the same axis. Therefore, it is beneficial to maintain the air pressure balance in the tweeter unit 30 and the woofer unit.
  • the tweeter magnetic circuit assembly 33 further includes a sound transmission magnet 333 disposed in the airflow channel 35 , and a plurality of pore structures are distributed in the sound transmission magnet 333 .
  • the sound-transmitting magnet 333 is a magnetic-conducting member, which can increase the magnetic permeability of the tweeter magnetic circuit assembly 33. Due to the distribution of the pore structure, the air in the magnetic-conducting housing 31 can communicate with the outside through the pore structure, and the magnetic-conducting diaphragm 37 The propelled airflow can still be transmitted to the outside through the pore structure.
  • the first magnetic steel 331 and the sound-transmitting magnet 333 are separate components, and the sound-transmitting magnet 333 may be foamed iron-nickel. In other embodiments, the first magnetic steel 331 and the sound-transmitting magnet 333 may also be integrally formed.
  • the magnetic conductive diaphragm 37 in this embodiment is a planar magnetic conductive diaphragm 37 .
  • the planar magnetic conductive diaphragm 37 provided in this embodiment can reduce the size of the sound generating device 10 .
  • the magnetic conductive diaphragm 37 includes a metal body, and the metal body includes one or more of stainless steel, silicon steel, carbon steel, iron-nickel alloy, iron-cobalt-vanadium alloy, and soft ferrite.
  • the metal body includes one or more of stainless steel, silicon steel, carbon steel, iron-nickel alloy, iron-cobalt-vanadium alloy, and soft ferrite.
  • the metal body vibrates, the sound quality emitted has a metallic texture.
  • the magnetic conductive diaphragm 37 also includes a damping layer disposed on the metal body, and the damping layer may be a high molecular polymer such as damping glue or polyester film, or may be a resin material such as polyurethane.
  • the damping property of the magnetic conductive diaphragm 37 can be adjusted through the damping layer, which is beneficial to the balance of the vibration of the magnetic conductive diaphragm 37 and brings a more delicate listening feeling.
  • the magnetic conductive diaphragm 37 includes a base material and a magnetic conductive layer disposed on the base material, and the base material is any one of metal or non-metal, elastomer or non-elastomeric body
  • the magnetic conductive layer is a powder with soft magnetic properties such as nickel, iron-nickel alloy, iron-phosphorus alloy, etc., which is disposed on the base material by plating, deposition, magnetron sputtering, and the like.
  • the front cover 21 is provided with a bass sound hole 212 that communicates with the bass magnetic gap 47 , and the bass sound hole 212 is arranged corresponding to the bass magnetic gap 47 .
  • the tweeter unit 30 is facing the sound output direction of the whole headphone, and the sound output path of the woofer unit 40 is the gap between the magnetic circuit below the bass diaphragm 42 that flows out from the bass sound outlet 212 .
  • the number of bass sound holes 212 can be multiple, so as to further improve the low frequency performance of the bass unit 40 .
  • the bass unit 40 further includes a centering support piece 48 , and the centering support piece 48 is respectively fixed to the bass diaphragm 42 and the middle shell 22 .
  • One end of the centering support piece 48 can be fixed on the end of the bass voice coil 43 away from the bass diaphragm 42, and the other end is fixed on the middle shell 22, which can ensure the linear balance of the bass vibration state and suppress polarization.
  • FIG. 5 is a schematic cross-sectional view of the sounding device with the front cover and the tweeter removed
  • a second step 221 and a third step 222 are formed on the inner side of the middle shell 22, and the second magnetic steel 41 is sandwiched between the front cover.
  • the bass unit 40 further includes a washer 45 , and the washer 45 is sandwiched between the second step 221 and the third step 222 .
  • the third step 222 is located below the second step 221 , which not only facilitates the assembly of the bass unit 40 but also has a compact and firm structure.
  • the washer 45 matches the shape of the second magnetic steel 41 , and is all attached to the second magnetic steel 41 , which further improves the magnetic flux of the bass unit 40 .
  • the back cover 23 includes a bottom cover portion 231 and a side cover portion 232 circumferentially surrounding the bottom cover portion 231
  • the bass unit 40 further includes a passive radiation membrane located between the bass diaphragm 42 and the bottom cover portion 231 . 46.
  • the passive radiation film 46 is disposed corresponding to the bass diaphragm 42, and the edge of the passive radiation film 46 is fixed on the fourth step 2321 formed by the side cover portion 232.
  • the bottom cover portion 231 is disposed away from the tweeter diaphragm, and the bottom cover portion 231 has functions such as protection and dust prevention.
  • the passive radiating membrane 46 is spaced apart from the bass membrane 42 and the bottom cover 231 respectively.
  • the bottom cover 231 can protect the passive radiation film 46 and prevent the passive radiation diaphragm from being scratched or collided by accident.
  • a second ventilation hole can be opened on the bottom cover 231 to connect the passive radiation film 46 and the bottom cover 231. The airflow is dredged in time to ensure the balance of internal and external air pressure.
  • the side cover part 232 is further formed with a fifth step 2322 , and the bass diaphragm 42 is fixed on the fifth step 2322 by the fixing ring 44 .
  • the edge of the bass diaphragm 42 is fixedly sandwiched between the fifth step 2322 of the side cover part 232 and the fixing ring 44 , and the fixing ring 44 stably fixes the bass diaphragm 42 on the side cover part 232 , which enhances the sound quality of the sound generating device 10 . the strength of the overall structure.
  • An assembly ear 2323 is formed at the end of the side cover part 232 away from the bottom cover part 231 , and a sixth step 223 is formed on the outer side of the middle shell 22 . The body is assembled to the main body of the earphone.
  • the present invention also provides an earphone, the earphone includes the above sound producing device 10 . Since the earphone adopts all the technical solutions of the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Manufacturing & Machinery (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

Abstract

Un appareil de production de son et un écouteur sont divulgués. L'appareil de production de son comprend un boîtier, une unité à pas élevé et une unité à faible pas; l'unité à pas élevé est fixée au boîtier et est située dans le boîtier, l'unité à pas élevé comprend un boîtier conducteur magnétique, et un diaphragme conducteur magnétique et un système de circuit magnétique à pas élevé disposé dans le boîtier conducteur magnétique, le diaphragme conducteur magnétique est suspendu dans le système de circuit magnétique à pas élevé, et le système de circuit magnétique à pas élevé est utilisé pour générer un champ électromagnétique alternatif pour entraîner le diaphragme conducteur magnétique à vibrer; l'unité à faible pas est fixée au boîtier et est située dans le boîtier, l'unité à faible pas comprend un ensemble de circuit magnétique à faible pas, un diaphragme à faible pas et une bobine mobile à faible pas connectée au diaphragme à faible pas; et un entrefer magnétique à faible pas pour permettre l'insertion de la bobine mobile à faible pas est formé entre l'ensemble de circuit magnétique à faible pas et le boîtier conducteur magnétique; et l'unité à faible pas et l'unité à pas élevé sont disposées de manière coaxiale. L'appareil de production de son de la présente invention prend en compte à la fois des performances à haute fréquence et des performances à basse fréquence, permet à l'unité à pas élevé d'avoir une efficacité de conversion électro-acoustique élevée, réduit l'espace occupé par l'appareil de production de son dans un écouteur, et augmente l'efficacité du circuit magnétique.
PCT/CN2021/136350 2021-02-02 2021-12-08 Appareil de production de son et écouteur WO2022166385A1 (fr)

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CN113055795B (zh) * 2021-02-02 2023-04-07 歌尔股份有限公司 发声装置和耳机
CN114257919A (zh) * 2021-11-29 2022-03-29 歌尔股份有限公司 发声装置和电子设备

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