WO2022166388A1 - Sound producing device and earphone - Google Patents

Abstract

Disclosed are a sound producing device and an earphone. The sound producing device comprises a tweeter unit and a woofer unit, wherein the tweeter unit comprises a tweeter housing, and a magnetic conductive diaphragm and two tweeter magnetic circuit systems which are arranged in the tweeter housing, the tweeter magnetic circuit system comprises a first magnetic steel attached to the tweeter housing and a coil arranged around the first magnetic steel, the magnetic conductive diaphragm is suspended between the tweeter magnetic circuit systems which are arranged opposite and spaced apart from each other, and the magnetic conductive diaphragm is used for vibrating to generate sound under the action of an alternating electromagnetic field generated by the tweeter magnetic circuit systems; and the woofer unit comprises a woofer housing, and a woofer diaphragm, a woofer voice coil and a woofer magnetic circuit system which are arranged in the woofer housing, the woofer unit is fixed to the tweeter housing, the woofer diaphragm is connected to the woofer voice coil, and a woofer magnetic gap for the woofer voice coil to insert is formed in the woofer magnetic circuit system. A vibration component to be driven by the tweeter magnetic circuit systems has a small mass and the electroacoustic conversion efficiency is high.

Description

Sound generators and headphones technical field

The utility model relates to the technical field of electro-acoustic conversion, in particular to a sound producing device and an earphone.

Background technique

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 have better high frequency performance. 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. However, the tweeters of the existing earphones are mostly energized through the voice coil, so that the voice coil moves in the gap, so that the voice coil drives the diaphragm to vibrate. During the vibrating and sounding process of the diaphragm, the voice coil and the diaphragm move together, resulting in large vibration quality, poor high-frequency sound quality, and low electro-acoustic conversion efficiency.

Utility model content

The main purpose of the present utility model is to provide a sound-generating device and an earphone, which aim to solve at least one technical problem of the existing sound-generating device capable of satisfying high frequency and low frequency effects at the same time.

In order to achieve the above-mentioned purpose, the sounding device provided by the present utility model, the sounding device comprises:

A tweeter unit, the tweeter unit includes a tweeter housing, a magnetic conductive diaphragm and two tweeter magnetic circuit systems arranged in the tweeter housing, and the tweeter magnetic circuit system includes a tweeter attached to the tweeter housing. A first magnetic steel and a coil arranged around the first magnetic steel, the magnetic conductive diaphragm is suspended between the two relatively spaced high-pitched magnetic circuit systems, and the magnetic conductive diaphragm is used for Vibrate and sound under the action of the alternating electromagnetic field generated by the high-pitched magnetic circuit system;

A bass unit, the bass unit includes a bass shell and a bass diaphragm, a bass voice coil and a bass magnetic circuit system arranged in the bass shell, the bass unit is fixed with the treble shell, and the bass diaphragm In connection with the bass voice coil, the bass magnetic circuit system is formed with a bass magnetic gap into which the bass voice coil is inserted.

Optionally, the high-pitched shell includes a first magnetic conductive shell and a second magnetic conductive shell that are combined with each other, the second magnetic conductive shell is fixed to the woofer, and the magnetic conductive diaphragm is arranged on the first Between a magnetic conductive shell and the second magnetic conductive shell, the two tweeter magnetic circuit systems are respectively arranged in the space surrounded by the first magnetic conductive shell and the magnetic conductive diaphragm, and the second the space surrounded by the magnetic conductive shell and the magnetic conductive diaphragm.

Optionally, the first magnetic conductive shell includes a top wall and a first side wall extending from the top wall, the second magnetic conductive shell includes a bottom wall and a second side wall extending from the bottom wall, The bottom wall is fixed with the bass unit; the first magnetic steel of the tweeter magnetic circuit system of one of the two tweeter magnetic circuit systems is arranged on the top wall and formed between the first side wall and the top wall. The first gap, the first magnetic steel of the other high-pitched magnetic circuit system is arranged on the bottom wall and forms a second gap with the second side wall, and the two coils are respectively arranged on the first a gap and the second gap.

Optionally, the top wall is provided with a high-pitched sound outlet.

Optionally, the bass magnetic circuit system includes a magnetic yoke, the bass housing includes a middle shell and a mounting cover that are fixed to each other, the bottom wall is fixed on the magnetic yoke, and the bass magnetic circuit system and the The middle shell is fixed, and the bass diaphragm is fixed on the installation cover.

Optionally, the first magnetic steel is formed with a high-pitched air flow channel that communicates with the high-pitched sound outlet, the bass magnetic circuit system is formed with a low-pitched air flow channel that communicates with the high-pitched air flow channel, and the high-pitched air flow channel is formed. are arranged coaxially with the bass airflow channel in sequence.

Optionally, the magnetic yoke is further provided with a bass sound outlet that communicates with the bass magnetic gap.

Optionally, the bass unit further includes a centering support piece, and the centering support piece is respectively fixed with the bass diaphragm and the bass shell.

Optionally, the bass unit further includes a passive radiation membrane located between the bass diaphragm and the bass housing, and the passive radiation membrane is disposed corresponding to the bass diaphragm.

In addition, the present invention also provides an earphone, the earphone includes the above-mentioned sound producing device.

In the utility model, the bass unit includes a bass diaphragm, a bass voice coil and a bass magnetic circuit system arranged in the bass shell, the bass diaphragm is connected with the bass voice coil, and the bass magnetic circuit system is formed with a bass magnet for the insertion of the bass voice coil. Gap, by fixing the tweeter shell and the woofer of the tweeter, both high-frequency and low-frequency performance are taken into account, and the tweeter includes a magnetic conductive diaphragm and two tweeter magnetic circuit systems arranged in the tweeter shell. The tweeter magnetic circuit system includes a first magnetic steel attached to the tweeter shell and a coil arranged around the first magnetic steel, and the magnetic conductive diaphragm is suspended on the two tweeter magnets arranged at opposite intervals. The magnetic conductive diaphragm is used to vibrate and emit sound under the action of the alternating electromagnetic field generated by the high-pitched magnetic circuit system, and the voice coil connected to the high-frequency diaphragm is omitted, so that only the magnetic conductive diaphragm vibrates The quality of the vibration components to be driven by the high-pitched magnetic circuit system is small, the high-frequency performance can be improved, and the sound-electric conversion efficiency can be improved. By arranging the coil around the first magnetic steel, the central area of the magnetic-conducting diaphragm produces more A large driving force is conducive to the vibration of the magnetic conductive diaphragm.

Description of drawings

In order to illustrate the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that are required in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are just some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can also be obtained based on the structures shown in these drawings without any creative effort.

1 is a schematic cross-sectional structural diagram of a sounding device according to an embodiment of the present invention;

2 is a schematic structural diagram of a sounding device according to an embodiment of the present invention;

3 is a schematic cross-sectional structural diagram of a tweeter unit of a sounding device according to an embodiment of the present invention;

4 is an exploded schematic diagram of a tweeter unit of a sound producing device according to an embodiment of the present invention;

5 is a schematic diagram of a disassembled structure of a sound-emitting device according to an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of the sound generating device of FIG. 1 from another angle.

7 is a schematic diagram of another disassembled structure of the sounding device according to an embodiment of the present invention;

8 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. 9 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.

Description of the reference numerals of the embodiment:

label name label name 10 sound device 212 Bass outlet twenty two middle shell twenty three Install the cover 231 Bottom cover 232 side cover 2311 second vent 491 yoke

2323 Assembly ears 30 tweeter 31 tweeter housing 311 first magnetic shell 3111 top wall 3112 first side wall 3113 wall body 49 bass shell 312 second magnetic shell 3121 bottom wall 3122 second side wall 33 Treble magnetic circuit system 331 first magnet 332 coil 333 sound transmission magnet 35 Treble airflow channel 36 Treble sound hole 40 woofer 41 Bass magnetic circuit system 42 Bass diaphragm 43 Bass voice coil 44 M 45 Bass airflow channel 46 Passive Radiation Film 47 Bass Magnetic Gap 48 centering piece 411 second magnet 37 Magnetic diaphragm 412 The third magnet 413 first washer 414 Second Wasser 415 first vent

The realization, functional characteristics and advantages of the purpose of the present utility model will be further described with reference to the accompanying drawings in conjunction with the embodiments.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, not all of them. Example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the difference between the various components under a certain posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication also changes accordingly.

In addition, the descriptions related to "first", "second", etc. in the present invention are only for the purpose of description, and should not be understood as indicating or implying their relative importance or implying the number of indicated technical features. Thus, a feature delimited with "first", "second" may expressly or implicitly include at least one of that feature. In addition, the technical solutions between the various embodiments can be combined with each other, but must be based on the realization by those of ordinary skill in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that the combination of such technical solutions does not exist. , is not within the scope of protection required by the present utility model.

The "up" and "down" referred to in this utility model are based on the orientation shown in FIG. 1, and are only used to explain the relative positional relationship between the components under the attitude shown in FIG. 1. If the specific attitude changes , the directional indication changes accordingly.

As shown in FIG. 1 to FIG. 3 , the present invention proposes a sounding device 10 including:

The tweeter unit 30 includes a tweeter housing 31 , a magnetic conductive diaphragm 37 arranged in the tweeter housing 31 and two tweeter magnetic circuit systems 33 . The first magnetic steel 331 and the coil 332 arranged around the first magnetic steel 331, the magnetic conductive diaphragm 37 is suspended between the two relatively spaced high-pitched magnetic circuit systems 33, and the magnetic conductive diaphragm 37 is used in the high-frequency magnetic Vibrate and sound under the action of the alternating electromagnetic field generated by the circuit system 33;

The bass unit 40 includes a bass housing 49 and a bass diaphragm 42, a bass voice coil 43 and a bass magnetic circuit system 41 arranged in the bass casing 49. The bass unit 40 is fixed to the tweeter casing 31, and the bass diaphragm is 42 is connected to the bass voice coil 43, and the bass magnetic circuit system 41 is formed with a bass magnetic gap 47 into which the bass voice coil 43 is inserted.

The tweeter unit 30 of the present invention is not provided with a voice coil connected to the magnetic conductive diaphragm 37, which is different from the conventional voice coil driving the diaphragm. When the coils 332 on both sides of the magnetic conductive diaphragm 37 are energized, the The alternating electromagnetic field is generated by the interaction of the two high-pitched magnetic circuit systems 33, and the magnetic conductive diaphragm 37 moves in the direction of the connecting line of the two high-pitched magnetic circuit systems 33 directly under the action of the alternating electromagnetic field, that is, in the two high-pitched magnetic circuit systems 33. Vibration and sound are generated in the vibration space formed between the systems 33 . During the sounding process of the tweeter 30, only the magnetic conductive diaphragm 37 moves. The tweeter unit 30 and the bass unit 40 are located on the same axis, 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 vibrates to produce sound. The utility model takes into account the full-band sound quality of bass and treble, and has better sense of hearing. During the sounding process of the tweeter unit 30 of the sound generating device 10, only the magnetic conductive diaphragm 37 moves, and the coil 332 and the first magnetic steel 331 in the tweeter magnetic circuit system 33 can remain stationary. When the coils 332 located on both sides of the magnetic conductive diaphragm 37 are not energized, 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.

Compared with the setting method of arranging the coil 332 inside the first magnetic steel 331, the present invention arranges the coil 332 around the first magnetic steel 331, so that in the magnetic field generated by the tweeter magnetic circuit system 33, the intensity of the permanent magnetic field in the central area is Compared with the intensity of the permanent magnetic field in the edge area, when the coil 332 is energized, the magnetic field intensity of the alternating magnetic field experienced by the central area of the magnetic conductive diaphragm 37 is greater than the magnetic field of the alternating magnetic field experienced by the edge area of the magnetic conductive diaphragm 37 . Therefore, the driving force received by the central region of the magnetic conductive diaphragm 37 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 easily affected by the alternating electromagnetic field to generate sound and vibrate. In one embodiment, the first magnetic steel 331 , the coil 332 and the magnetic conductive diaphragm 37 are coaxially arranged to facilitate vibration balance.

In the present invention, by setting the high-pitched magnetic circuit system 33 on both sides of the magnetic-conducting diaphragm 37, the energization of the coil 332 can be controlled, so that the high-pitched and high-pitched magnetic circuit system 33 can generate an alternating electromagnetic field, and the magnetic conductive diaphragm 37 Under the action of the alternating electromagnetic field, it can vibrate in the vibration space, and the voice coil connected to the diaphragm is omitted, so that only the magnetic conductive diaphragm 37 vibrates, and the vibration components to be driven by the high-pitched and high-pitched magnetic circuit system 33 are of small mass, which can improve the sound quality. frequency performance, and can improve the conversion efficiency of sound and electricity; the present invention, by arranging the coil 332 around the first magnetic steel 331, makes the driving force generated in the central area of the magnetic conductive diaphragm 37 larger, which is conducive to the generation of the magnetic conductive diaphragm 37. vibration.

Optionally, the magnetization directions of the first magnetic steels 331 of the two high-frequency magnetic circuit systems 33 are the same, and the current directions of the coils 332 of the two high-frequency magnetic circuit systems 33 are opposite. When the coil 332 is not energized, 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 . 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.

Please refer to FIGS. 8 and 9 , wherein FIG. 8 is a force analysis diagram of the magnetic conductive diaphragm 37 in an embodiment when the coil 332 is not energized; FIG. 9 is a magnetic conductive vibration in an embodiment when the coil 332 is energized Force analysis diagram of membrane 37. In the embodiment shown in FIG. 8 , 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 poles at the upper end and S poles 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.

In the embodiment shown in FIG. 9 , 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 current flow in the opposite direction. According to 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. Under the action, the downward deformation generates vibration, thereby further improving the electro-acoustic conversion efficiency of the sound generating device 10 .

From another perspective, as shown in Figure 8, when the two coils are not energized, the magnetic flux in the magnetically conductive diaphragm is ΦA=Φ _g1 +Φ _g2 =Φ _g +(-Φ _g )≈0; among them, Φ _g1 is the magnetic flux generated by the first magnetic steel 331 above, the direction of φ _g1 is defined as the positive direction, Φ _g2 is the magnetic flux generated by the first magnetic steel 331 below, the magnetic flux generated by the first magnetic steel 331 below and the first magnetic steel 331 above The magnetic flux is the same in magnitude and opposite in direction, and its direction is the negative direction.

As shown in FIG. 9 , when the two coils pass through opposite currents, the magnetic flux of the magnetic conductive diaphragm 37 received by the upper treble magnetic circuit system 33 is: φ ₁ =φ _g1 +φ _i1 =φ _g +(-φ _i ), 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 of the magnetic conductive diaphragm 37 received by the lower treble magnetic circuit system 33 is: φ ₂ =φ _g2 +φ _i2 =(-φ _g )+(-φ _i ). The direction of the magnetic flux generated by the current of the lower coil 332 is the same as that of the first magnetic The magnetic flux produced by steel 331 has the same direction, which is negative.

Therefore, the magnetic permeable diaphragm 37 receives the magnetic flux φ ₁ of the upper tweeter magnetic circuit system 33 < the magnetic flux φ ₂ of the lower tweeter magnetic circuit system 33 received by the magnetic conductive diaphragm 37 .

In addition, when the two coils 332 are energized with reverse currents, ΦA'=Φ ₁₊ Φ ₂₌ Φ _g +(-Φ _i )+(- Φ _g )+(-Φ _i )=-2Φ _i , if this is energized The final state of the state, the initial state of no potential, the change of the magnetic flux in the magnetic permeable diaphragm 37 is: △φ=ΦA'-ΦA=error! Reference source not found. _2φi is wrong! Reference source not found. 0=Error! Reference source not found. 2φ _i . The electromagnetic force Fφ received by the magnetic conductive diaphragm 37 is proportional to the rate of change of the magnetic flux, that is, Fφ and Δφ/Δt=error! Reference source not found. 2φ _i /Δt is proportional.

In the embodiment shown in FIG. 9 , the electromagnetic force Fφ pushes the magnetic conductive diaphragm 37 to move toward the lower treble magnetic circuit system 33 . Similarly, when the current direction of the coil 332 above and below the magnetic permeable diaphragm 37 is the opposite direction as shown in FIG. 9 , through the above derivation process, it can be known that the magnetic permeable diaphragm 37 is subjected to the magnetic flux of the upper tweeter magnetic circuit system 33 φ ₁ ′>magnetic permeability The diaphragm 37 is subjected to the magnetic flux φ ₂ ' of the lower treble magnetic circuit system 33, and the electromagnetic force Fφ' received by the magnetic conductive diaphragm 37 is proportional to the rate of change of the magnetic flux, that is, Fφ' and Δφ'/Δt=2φ _i / Δt is proportional. The electromagnetic force generated by the high-pitched magnetic circuit system 33 pushes the magnetic-conductive diaphragm 37 to move toward the upper treble magnetic circuit system 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 tweeter shell 31 includes a first magnetic conductive shell 311 and a second magnetic conductive shell 312 that are combined with each other. The second magnetic conductive shell 312 is fixed with the woofer 40, and the magnetic conductive diaphragm 37 is arranged on the first magnetic conductive shell 311 and the second magnetic conductive shell 312. Between the magnetic conductive shells 312 , two high-pitched magnetic circuit systems 33 are respectively disposed in the space surrounded by the first magnetic conductive shell 311 and the magnetic conductive diaphragm 37 , and in the space surrounded by the second magnetic conductive shell 312 and the magnetic conductive diaphragm 37 . Inside, the bottom of the second magnetic conductive shell 312 is attached to the bass unit 40 .

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 , and the bottom wall 3121 and The bass unit 40 is fixed; the first magnetic steel 331 of one of the two treble magnetic circuit systems 33 is arranged on the top wall 3111 and forms a first gap with the first side wall 3112, and the other magnetic circuit system The first magnetic steel 331 is arranged on the bottom wall 3121 and forms a second gap with the second side wall 3122, and the two coils 332 are respectively arranged in the first gap and the second gap. Specifically, the first magnetically conductive shell 311 includes a top wall 3111 and a first side wall 3112 extending from the top wall 3111, and the second magnetically conductive shell 312 includes a bottom wall 3121 and a second sidewall 3122 extending from the bottom wall 3121; The first magnetic steel 331 of one of the tweeter magnetic circuit systems 33 is disposed 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 system 33 The steel 331 is arranged on the bottom wall 3121 and forms a second gap with the second side wall 3122, and the two coils 332 are respectively arranged in the first gap and the second gap. That is, from the outside to the inside, the first side wall 3112 , a coil 332 and a first magnetic steel 331 are successively sleeved, and the second side wall 3122 , another coil 332 and another first magnetic steel 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 system 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 on the first side by gluing, welding, etc. The end of the side wall 3112 or the second side wall 3122 is then fixed with the first magnetic conductive shell 311 and the second magnetic conductive shell 312, so as to facilitate product assembly. At the same time, since 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 system 33. The magnetic conductive diaphragm 37 and The magnetic field distribution between the tweeter magnetic circuit systems 33 is not affected by other fixed components, which is beneficial to improve the conversion efficiency of sound and electricity.

As shown in FIG. 1 , FIG. 5 and FIG. 6 , the first magnetic steel is provided with a high-pitched air flow channel 35 with an opening facing the magnetic conductive diaphragm 37 , and the top wall 3111 is provided with a high-pitched sound outlet 36 that communicates with the high-pitched air flow channel 35 . By opening the high-pitched sound outlet 36 , it is beneficial for the magnetic conductive diaphragm 37 to vibrate in the high-pitched housing 31 .

As shown in FIG. 3 and FIG. 4 , the high-pitched magnetic circuit system 33 further includes a sound-transmitting magnet 333 disposed in the high-pitched airflow channel 35 , and a plurality of pore structures are distributed in the sound-transmitting magnet 333 . The sound-transmitting magnet 333 is a magnetic-conducting member, which can increase the magnetic permeability of the tweeter magnetic circuit system 33. Due to the distribution of the pore structure, the air in the tweeter shell 31 can communicate with the outside through the pore structure, and the magnetic-conducting diaphragm 37 pushes The airflow can still be transmitted to the outside through the pore structure. In this embodiment, 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 . Compared with the diaphragm having the folded ring structure in the prior art, the planar magnetic conductive diaphragm 37 provided in this embodiment can reduce the size of the sound generating device 10 . Specifically, the magnetic conductive diaphragm 37 includes a metal body, and the metal body includes one or more of stainless steel S430, silicon steel, SPCC, iron-nickel alloy, iron-cobalt-vanadium alloy, and soft ferrite. Compared with rubber or paper diaphragms, when the metal body vibrates, the sound quality emitted has a metallic texture. The magnetic conductive diaphragm 37 may further include a damping layer disposed on the metal body, and the damping layer may be an adhesive film layer, PEEK, TPU, TPEE, or the like. 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. In another embodiment, the magnetic conductive diaphragm 37 includes a base material and a magnetic conductive layer disposed on the base material, the base material is any one of metal or non-metal, elastomer or non-elastomeric body, and the magnetic conductive layer is nickel , iron-nickel alloy, iron-phosphorus alloy and other powders with soft magnetic properties are arranged on the substrate by plating, deposition, magnetron sputtering, etc.

In one embodiment, the bass magnetic circuit system 41 includes a magnetic yoke 491, the bass housing 49 includes a middle casing 22 and a mounting cover 23 fixed to each other, the bottom wall 3121 is fixed on the magnetic yoke 491, and the bass magnetic circuit system 41 and the middle casing are 22 is fixed, the bass diaphragm 42 is fixed on the installation cover 23, and the yoke 491 is used to fix the tweeter unit 30 and the woofer unit 40. When assembling, you only need to assemble the tweeter unit 30 and the woofer unit 40 respectively, and finally assemble the tweeter unit 30. The second magnetic conductive shell 312 can be attached to the magnetic yoke 491 .

As shown in FIG. 1 and FIG. 6 , the bass magnetic circuit system 41 is formed with a bass airflow channel 45 communicating with the treble airflow channel 35 . The bottom wall 3121 is provided with a first vent hole 415. The first vent hole 415 corresponds to the high-pitched sound outlet 36. When the bass diaphragm 42 vibrates, the gas in the bass shell 49 can pass through the bass airflow channel 45 through the first vent hole 415. The vent hole 415 enters the tweeter airflow channel 35 and is discharged out of the sound generating device 10, which is beneficial to maintain the air pressure balance in the tweeter unit 30 and the woofer unit 40, avoid excessive air pressure inside the tweeter unit 30 and the woofer unit 40, and prevent the tweeter unit 30 and the woofer unit from being affected. 40 performance. In one embodiment, the bass magnetic circuit system 41 further includes a second magnet 411 and a third magnet 412 arranged at intervals, the bass airflow channel 45 is opened on the second magnet 411, and the third magnet 412 is wound around the second magnet 412. The steel 411 is circumferentially surrounded, the second magnetic steel 411 is fixed to the side of the magnetic yoke 491 away from the tweeter housing 31 , and the third magnetic steel 412 is fixed to the magnetic yoke 491 and the middle shell 22 respectively. The bass magnetic circuit system 41 may further include a first washer 413 and a second washer 414. The first washer 413 matches the shape of the second magnetic steel 411 and is attached to the side of the second magnetic steel 411 away from the yoke 419. The second washer 414 matches the shape of the third magnetic steel 412 and is attached to the side of the third magnetic steel 412 away from the yoke 419 . A bass magnetic gap 47 is formed between the second magnetic steel 411 and the third magnetic steel 412 . The first washer 413 and the second washer 414 further increase the magnetic flux of the bass magnetic circuit system.

The yoke 419 is also provided with a bass sound outlet 212 that communicates with the bass magnetic gap 47 . The bass sound hole 212 is provided corresponding to the bass magnetic gap 47 . The tweeter unit 30 is facing the sound output direction of the whole headphone. The sound output path of the woofer unit 40 flows out from the bass sound hole 212 through the bass magnetic gap 47. The number of bass sound holes 212 can be multiple to further improve the bass unit. 40's of low frequency performance.

As shown in FIG. 7 , 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 bass shell 49 . 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 can be fixed on the middle shell 22, which can ensure the linear balance of the bass vibration state and suppress polarization.

Optionally, the bass unit 40 further includes a passive radiation membrane 46 located between the bass diaphragm 42 and the bass housing 49 , and the passive radiation membrane 46 is disposed corresponding to the bass diaphragm 42 . In one embodiment, the mounting cover 23 includes a bottom cover portion 231 and a side cover portion 232 circumferentially surrounding the bottom cover portion 231 , and 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 side cover part 232. The bottom cover portion 231 is disposed opposite to the magnetic conductive diaphragm 37 , 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. When the bass membrane 42 vibrates, the air pressure generated by the bass membrane 42 between the passive radiating membranes 46 is compressed or expanded. The passive radiating film 46 generates vibrations, which facilitates the diffusion of low-frequency signals, improves the volume of bass, and reduces the resonant frequency, which can effectively improve the low-frequency performance of the sound-emitting device 10 . The bottom cover 231 can protect the passive radiation film 46 and prevent the passive radiation diaphragm from being accidentally scratched or collided. At the same time, a ventilation hole can be opened on the bottom cover 231 to reduce the airflow between the passive radiation film 46 and the bottom cover 231. Timely dredging to ensure the balance of internal and external air pressure. The bottom cover 231 is provided with a second ventilation hole 2311 . When the passive radiation film 46 vibrates, the second ventilation hole 2311 can clear the airflow generated between the passive radiation film 46 and the bottom cover 231 in time to avoid excessive air pressure.

The bass diaphragm 42 is fixed on the side cover part 23 by the fixing ring 44, the edge of the bass diaphragm 42 is fixedly sandwiched between the side cover part 23 of the side cover part 232 and the fixing ring 44, and the fixing ring 44 fixes the bass diaphragm 42 Being stably fixed on the side cover portion 232 enhances the strength of the overall structure of the sound generating device 10 . A mounting ear 2323 is formed at one end of the side cover portion 232 away from the bottom cover portion 231 , and the mounting ear 2323 can be used to mount the entire sound generating device to the main body of the earphone.

In addition, the present invention also provides an earphone, and the earphone includes the above sounding 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.

The above are only the preferred embodiments of the present utility model, and are not intended to limit the patent scope of the present utility model. Under the concept of the utility model of the present utility model, the equivalent structure transformation made by using the contents of the description and the accompanying drawings of the present utility model, or directly / Indirect applications in other related technical fields are included in the scope of patent protection of the present utility model.

Claims (10)

A sounding device, characterized in that the sounding device comprises: A tweeter unit, the tweeter unit includes a tweeter housing, a magnetic conductive diaphragm and two tweeter magnetic circuit systems arranged in the tweeter housing, and the tweeter magnetic circuit system includes a tweeter attached to the tweeter housing. A first magnetic steel and a coil arranged around the first magnetic steel, the magnetic conductive diaphragm is suspended between the two relatively spaced high-pitched magnetic circuit systems, and the magnetic conductive diaphragm is used for Vibrate and sound under the action of the alternating electromagnetic field generated by the high-pitched magnetic circuit system; A bass unit, the bass unit includes a bass shell and a bass diaphragm, a bass voice coil and a bass magnetic circuit system arranged in the bass shell, the bass unit is fixed with the treble shell, and the bass diaphragm In connection with the bass voice coil, the bass magnetic circuit system is formed with a bass magnetic gap into which the bass voice coil is inserted. The sound-generating device according to claim 1, wherein the tweeter shell comprises a first magnetic conductive shell and a second magnetic conductive shell that are assembled with each other, and the second magnetic conductive shell is fixed to the woofer, so that the The magnetic conductive diaphragm is arranged between the first magnetic conductive casing and the second magnetic conductive casing, and the two tweeter magnetic circuit systems are respectively arranged on the first magnetic conductive casing and the magnetic conductive diaphragm In the surrounding space, and in the space surrounded by the second magnetically conductive shell and the magnetically conductive diaphragm. The sound-generating device of claim 2, wherein the first magnetically conductive shell includes a top wall and a first side wall extending from the top wall, and the second magnetically conductive shell includes a bottom wall and a first side wall extending from the top wall. The second side wall extending from the bottom wall, the bottom wall is fixed with the bass unit; the first magnet steel of the tweeter magnetic circuit system of one of the two tweeter magnetic circuit systems is arranged on the top wall and is A first gap is formed between it and the first side wall, and another first magnetic steel of the tweeter magnetic circuit system is arranged on the bottom wall and forms a second gap with the second side wall. Each of the coils is disposed in the first gap and the second gap, respectively. The sound-generating device according to claim 3, wherein the top wall is provided with a high-pitched sound hole. The sound generating device according to claim 4, wherein the bass magnetic circuit system comprises a magnetic yoke, the bass housing comprises a middle shell and a mounting cover fixed to each other, and the bottom wall is fixed on the magnetic yoke , the bass magnetic circuit system is fixed with the middle shell, and the bass diaphragm is fixed on the installation cover. The sound generating device according to claim 5, wherein the first magnetic steel is formed with a high-pitched air flow channel that communicates with the high-pitched sound outlet hole, and the bass magnetic circuit system is formed with a high-pitched air flow channel that communicates with the high-pitched sound outlet. The bass airflow channel, the high-pitched airflow channel and the bass airflow channel are arranged coaxially in turn. The sound-generating device according to claim 5, characterized in that, the yoke is further provided with a bass sound outlet which is communicated with the bass magnetic gap. The sound generating device according to any one of claims 1 to 7, wherein the bass unit further comprises a centering support piece, and the centering support piece is respectively connected with the bass diaphragm and the bass shell. fixed. The sound-generating device according to any one of claims 1 to 7, wherein the bass unit further comprises a passive radiation membrane located between the bass diaphragm and the bass shell, the passive radiation membrane Set corresponding to the bass diaphragm. An earphone, characterized in that the earphone comprises the sound producing device according to any one of claims 1 to 9.

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