CN112770235A

CN112770235A - Sound production device and earphone

Info

Publication number: CN112770235A
Application number: CN202110143280.1A
Authority: CN
Inventors: 王莹; 郭晓冬
Original assignee: Goertek Inc
Current assignee: Goertek Inc
Priority date: 2021-02-02
Filing date: 2021-02-02
Publication date: 2021-05-07
Also published as: WO2022166383A1

Abstract

The invention discloses a sound generating device and an earphone, wherein the sound generating device comprises a magnet yoke, a high pitch unit and a low pitch unit, the magnet yoke comprises an accommodating part, and the accommodating part comprises a side wall and a bottom wall which are mutually connected to form an accommodating space; the high-pitch unit comprises a first magnetic part, a high-pitch vibrating diaphragm and a high-pitch voice coil connected with the high-pitch vibrating diaphragm, the first magnetic part is placed in the accommodating space, a high-pitch magnetic gap for the high-pitch voice coil to insert is formed between the first magnetic part and the side wall, and the high-pitch vibrating diaphragm is a planar metal vibrating diaphragm; the low-pitch unit comprises a second magnetic part, a low-pitch vibrating diaphragm and a low-pitch voice coil connected with the low-pitch vibrating diaphragm, a low-pitch magnetic gap for the low-pitch voice coil to be inserted is formed between the second magnetic part and the side wall, and the low-pitch unit and the high-pitch unit are coaxially arranged.

Description

Sound production device and earphone

Technical Field

The invention relates to the technical field of electroacoustic conversion, in particular to a sound production device and an earphone.

Background

The sound generating mechanism of conventional earphone generally only contains a vibration unit, and this kind of structural design is fairly simple, but can't compromise the performance and the tone quality of product different frequency channels when high frequency and low frequency well, and tone quality is relatively poor, and the low frequency performance that has some earphones is better, and some then is that the high frequency performance is better. The sound production device with the double vibration units can meet the requirement that low frequency and high frequency work simultaneously, and has complementary and improved effects on performance curves of products and sound quality of listening. However, the sound generating device of the existing dual-vibration unit generally adopts an external stacked structure, i.e. the high pitch unit and the low pitch unit are in an up-down same direction or opposite direction structure, so that the occupied space is large, the utilization rate of a magnetic circuit is low, and the bandwidth and the tone quality are slightly insufficient.

Disclosure of Invention

The invention mainly aims to provide a sound generating device and an earphone, and aims to solve the technical problem that the existing sound generating device capable of meeting high-frequency and low-frequency effects simultaneously occupies a large space.

In order to achieve the above object, the present invention provides a sound generating device, including:

a yoke including an accommodating part including a side wall and a bottom wall connected to each other to form an accommodating space;

the high-pitch unit comprises a first magnetic part, a high-pitch vibrating diaphragm and a high-pitch voice coil connected with the high-pitch vibrating diaphragm, the first magnetic part is placed in the accommodating space, a high-pitch magnetic gap for the high-pitch voice coil to insert is formed between the first magnetic part and the side wall, and the high-pitch vibrating diaphragm is a plane metal vibrating diaphragm;

bass unit, bass unit include second magnetism portion, bass vibrating diaphragm and with the bass voice coil loudspeaker voice coil that the bass vibrating diaphragm is connected, second magnetism portion with form the confession between the lateral wall bass voice coil loudspeaker voice coil male bass magnetism clearance, bass unit and the coaxial setting of high pitch unit.

Optionally, the yoke further includes a connecting portion formed by extending outward from an end of the sidewall away from the bottom wall, and an edge of the high-pitched diaphragm is fixed to the connecting portion through a first fixing ring.

Optionally, the yoke further includes a surrounding portion that surrounds along the outer circumference of the connecting portion, and the second magnetic portion is fixed to a side of the surrounding portion that deviates from the tweeter diaphragm.

Optionally, first magnetism portion includes first magnet steel and is fixed in the first magnificent department of first magnet steel, first magnet steel with the diapire is fixed, second magnetism portion includes second magnet steel and is fixed in the second magnificent department of second magnet steel, the second magnet steel with the portion of encircleing deviates from one side of high pitch vibrating diaphragm is fixed, first magnificent department with form between the lateral wall high pitch magnetic gap, the second magnificent department with form between the lateral wall low pitch magnetic gap.

Optionally, the surrounding portion is provided with a sound outlet hole communicated with the low-frequency magnetic gap.

Optionally, the tweeter diaphragm is a single-layer metal layer.

Optionally, the high-pitched sound diaphragm includes a metal layer and a damping layer disposed outside the metal layer.

Optionally, the thickness of the high-pitch diaphragm is 10-40 μm, and the elastic modulus of the high-pitch diaphragm is greater than or equal to 30 GPa.

Optionally, the sound generating device further comprises a cover body provided with a vent hole, and the bass diaphragm is fixed on the cover body.

Optionally, the cover body comprises a bottom cover and a side cover connected with the bottom cover, the bottom cover and the bass diaphragm are arranged at an interval and provided with the vent hole, the side cover is provided with a first step, and the bass diaphragm is fixed on the first step through a second fixing ring.

Optionally, the bass unit further includes a passive radiation film located between the bass diaphragm and the bottom cover, the passive radiation film is disposed corresponding to the bass diaphragm, and an edge of the passive radiation film is fixed on a second step formed by the side cover.

In addition, the invention also provides an earphone which comprises the sound production device.

In the technical scheme of the invention, the sound production device comprises a magnetic yoke, a treble unit and a bass unit, wherein the magnetic yoke comprises an accommodating part, and the accommodating part comprises a side wall and a bottom wall which are connected with each other to form an accommodating space; the high-pitch unit comprises a first magnetic part, a high-pitch vibrating diaphragm and a high-pitch voice coil connected with the high-pitch vibrating diaphragm, the first magnetic part is placed in the accommodating space, a high-pitch magnetic gap for the high-pitch voice coil to insert is formed between the first magnetic part and the side wall, and the high-pitch vibrating diaphragm is a planar metal vibrating diaphragm; the bass unit comprises a second magnetic part, a bass vibrating diaphragm and a bass voice coil connected with the bass vibrating diaphragm, and a bass magnetic gap for the bass voice coil to be inserted is formed between the second magnetic part and the side wall.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic cross-sectional view of a sound generating device according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a sound generating device according to an embodiment of the present invention;

FIG. 3 is an exploded view of an embodiment of the sound generator of the present invention;

FIG. 4 is another exploded view of an embodiment of the sound generating device of the present invention;

FIG. 5 is a schematic view from another angle of FIG. 1;

FIG. 6 is a bottom view of FIG. 2;

fig. 7 is a top view of fig. 2.

Examples reference numbers illustrate:

the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The references to "up" and "down" in the present invention are based on the orientation shown in fig. 1 and are used only to explain the relative positional relationship between the components in the attitude shown in fig. 1, and if the particular attitude is changed, the directional indication is changed accordingly.

As shown in fig. 1 to 4, the present invention provides a sound generating device 10, where the sound generating device 10 includes:

a yoke 20, the yoke 20 including a receiving portion 21, the receiving portion 21 including a side wall 211 and a bottom wall 212, the side wall 211 and the bottom wall 212 being connected to each other to form a receiving space 213;

the high-pitch unit 30, the high-pitch unit 30 includes the first magnetic part, high-pitch diaphragm 32 and high-pitch voice coil 33 connected with high-pitch diaphragm 32, the first magnetic part is placed in the accommodation space 213, the high-pitch magnetic gap 36 inserted by high-pitch voice coil 33 is formed between the first magnetic part and the sidewall 211, the high-pitch diaphragm 32 is a plane metal diaphragm;

bass unit 40, bass unit 40 include second magnetism portion, bass vibrating diaphragm 42 and the bass voice coil 43 of being connected with bass vibrating diaphragm 42, form between second magnetism portion and the lateral wall 211 and supply the bass magnetic gap 47 that bass voice coil 43 inserted, and bass unit 40 and tweeter unit 30 are coaxial to be set up, and bass unit 40 and tweeter unit 30 set up dorsad.

Wherein, yoke 20 is the magnetic conduction structure, the lateral wall 211 of the holding portion 21 of yoke 20 encircles along diapire 212 circumference, it can place the accommodation space 213 of first magnetism portion to have formed one, the bottom of first magnetism portion is fixed in the diapire 212 of holding portion 21, the lateral part of first magnetism portion sets up with the lateral wall 211 interval of holding portion 21, high pitch magnetic gap 36 has been formed, high pitch vibrating diaphragm 32 is fixed with yoke 20, high pitch voice coil 33's upper end is fixed in high pitch vibrating diaphragm 32, high pitch voice coil 33 inserts in high pitch magnetic gap 36, under the magnetic field effect that high pitch magnetic gap 36 produced, high pitch voice coil 33 vibrates after the circular telegram, thereby drive high pitch vibrating diaphragm 32 vibration sound. And bass unit 40 and treble unit 30 set up coaxially dorsad, and treble unit 30 is whole to be embedded into bass unit 40, directly replaces the central magnetic circuit part of bass unit 40, has not only compromise high frequency and the low frequency performance of sound generating mechanism 10, and has reduced the overall height of sound generating mechanism 10, has reduced the occupation space of sound generating mechanism 10 in the earphone. The second magnetic part of the bass unit 40 is located outside the accommodating space 213, and the second magnetic part and the sidewall 211 of the accommodating part 21 are spaced to form a bass magnetic gap 47, the lower end of the bass voice coil 43 is fixed with the bass vibration diaphragm 42, the bass voice coil 43 is inserted into the bass magnetic gap 47, and the bass voice coil 43 vibrates after being electrified, so as to drive the bass vibration diaphragm 42 to vibrate and sound. Treble unit 30 and bass unit 40 are located same axis, and set up dorsad, and treble unit 30 adopts embedded structure, replaces 40 central magnetic circuit parts of bass unit, when providing the magnetic flux, has effectively reduced the holistic height of sound generating mechanism 10, has reduced sound generating mechanism 10's occupation space, has promoted magnetic circuit efficiency. Moreover, the high pitch diaphragm 32 is a planar metal diaphragm, i.e. a planar structure is adopted to replace the traditional diaphragm in the form of a corrugated ring, so that the high pitch unit 30 is arranged to have a larger bandwidth; because the high-pitch vibrating diaphragm 32 is flat, the whole machine provided with the sound generating device 10 does not need to reserve a space for avoiding a corrugated ring structure, so that the size of a product is smaller; by arranging the metal high-pitch vibrating diaphragm 32, the sounding has metal texture, and different hearing feelings are provided for users.

Specifically, as shown in fig. 1 and 5, the yoke 20 further includes a connecting portion 22 formed to extend outward from an end of the side wall 211 remote from the bottom wall 212, and an edge of the tweeter diaphragm 32 is fixed to the connecting portion 22 by a first fixing ring 34. The opening of the accommodating space 213 is upward, the connecting portion 22 extends outward from the upper edge of the sidewall 211, the first fixing ring 34 can be bonded to the upper end of the connecting portion 22, the edge of the high-pitched diaphragm 32 is bonded to the upper side of the first fixing ring 34, a certain gap is formed between the lower end of the high-pitched diaphragm 32 and the first magnetic portion, and the upper end is free of shielding, so that the vibration space of the high-pitched diaphragm 32 is large, and the high-frequency performance is excellent.

In one embodiment, the tweeter diaphragm 32 is a single metal layer made of an alloy material, preferably magnesium aluminum alloy.

In another embodiment, the treble diaphragm 32 includes a metal layer and a damping layer disposed outside the metal layer. The metal layer may be one or more of magnesium-lithium alloy, magnesium-aluminum alloy, aluminum film, titanium film, stainless steel, silicon steel and other metal materials, and preferably magnesium-aluminum alloy. The damping layer may be a film adhesive layer, PEEK, TPU, TPEE, etc. The damping of the high-pitch vibrating diaphragm 32 can be adjusted through the damping layer, so that the vibration balance of the high-pitch vibrating diaphragm 32 is facilitated, and a finer and finer hearing feeling is brought.

In addition, the high-pitch vibrating diaphragm 32 is made of metal alloy materials, replaces conventional elastomer materials, has high-modulus and high-strength performances, the modulus is generally larger than or equal to 30GPa, the thickness is between 10-40 um, the high-frequency sound quality of the earphone can be improved while the effective bandwidth is expanded, and the high-pitch vibrating diaphragm can replace a rubber vibrating diaphragm or a paper vibrating diaphragm in the prior art, so that different choices are provided for users.

The yoke 20 further includes a surrounding portion 23 surrounding along the circumferential direction of the connecting portion 22, and the second magnetic portion is fixed to a side of the surrounding portion 23 away from the high-pitched diaphragm 32, that is, the upper end of the second magnetic portion is fixed to the lower end of the surrounding portion 23, so that the whole structure is compact, and the occupied space of the sound generating device 10 is reduced.

Optionally, first magnetism portion includes first magnet steel 31 and is fixed in first magnificent department 35 of first magnet steel 31, and first magnet steel 31 is fixed with diapire 212, and second magnetism portion includes second magnet steel 41 and is fixed in second magnificent department 45 of second magnet steel 41, and second magnet steel is fixed with the one side that encircles portion 23 and deviates from high pitch vibrating diaphragm 32, forms between first magnificent department 35 and the lateral wall 211 high pitch magnetic gap 36 forms low pitch magnetic gap 47 between second magnificent department 45 and the lateral wall 211. The first washer 35 is matched with the first magnetic steel 31 in shape and is attached to one side of the first magnetic steel 31 departing from the bottom wall 212 of the accommodating part 21; the second washer 45 is matched with the second magnetic steel 41 in shape and is attached to one side of the second magnetic steel 41 departing from the surrounding part 23 of the magnetic yoke 20.

More specifically, the surrounding portion 23 includes a vertical wall 231 and a horizontal wall 232, the vertical wall 231 extends downward from the connecting portion 22, the horizontal wall 232 extends outward from the vertical wall 231, the vertical wall 231 may be parallel to the side wall 211 of the accommodating portion 21, the horizontal wall 232 may be parallel to the bottom wall 212 of the accommodating portion 21, the lower end of the horizontal wall 232 is fixed to the upper end of the second magnetic steel 41, and the edge of the horizontal wall 232 may be flush with the edge of the second magnetic steel 41, which may further reduce the occupied space of the sound generating device 10. The yoke 20 may further include an extension portion 24 extending from the horizontal wall 232 of the surrounding portion 23 in a direction away from the second magnetic steel 41, that is, the extension portion 24 extends upward from the outer edge of the horizontal wall 232, and the upper end of the extension portion 24 may be flush with the top end of the tweeter diaphragm 32, so as to protect the tweeter diaphragm 32 without increasing the overall height of the sound generating device 10.

In an embodiment, as shown in fig. 1, 5 and 7, the surrounding portion 23 is provided with a sound outlet hole 231 communicated with the low-pitched magnetic gap 47, specifically, a vertical wall 231 of the surrounding portion 23 is provided with a first through hole, a horizontal wall 232 of the surrounding portion 23 is provided with a second through hole, the first through hole and the second through hole are communicated to form the sound outlet hole 231, the low-pitched magnetic gap 47 is communicated with the sound outlet hole 231 to form an air flow channel of the bass unit 40, and when the bass diaphragm 42 vibrates, the generated air flow flows out of the sound outlet hole 231 through the low-pitched magnetic gap 47. The number of the sound emitting holes 231 may be plural, and the plural sound emitting holes 231 may be uniformly arranged along the circumferential direction of the surrounding portion 23 at intervals, so as to further improve the low frequency performance of the bass unit 40.

As shown in fig. 1, 5 and 6, the sound generating apparatus 10 of the present embodiment further includes a cover 50 with a vent 511, and the bass diaphragm 42 is fixed on the cover 50. Lid 50 is used for covering and establishes bass vibrating diaphragm 42 and fixed bass unit 40, bass vibrating diaphragm 42 can adopt the ordinary vibrating diaphragm that rolls over the ring form, including middle ball top and all around roll over the ring portion promptly, the edge of bass vibrating diaphragm 42 is fixed on lid 50, when bass vibrating diaphragm 42 vibrates, the air vent 511 that sets up on the gaseous accessible lid 50 between bass vibrating diaphragm 42 and the lid 50 flows out, can avoid the inside atmospheric pressure of bass unit 40 to be too big, in order to prevent to influence the performance of bass unit 40.

More specifically, the cover 50 includes a bottom cover 51 and a side cover 52 connected to the bottom cover 51, the bottom cover 51 and the bass diaphragm 42 are spaced apart from each other and provided with the vent 511, the side cover 52 is formed with a first step 521, and the bass diaphragm 42 is fixed to the first step 521 through the second fixing ring 44. The bottom cover 51 is disposed opposite to the high-pitched diaphragm 32, the bottom cover 51 has functions of protection, dust prevention and the like, the number of the vent holes 511 on the bottom cover 51 can be multiple, and the vent holes 511 are uniformly arranged on the bottom cover 51 at intervals. The edge of the bass diaphragm 42 is fixedly clamped between the first step 521 of the side cover 52 and the second fixing ring 44, the second washer 45 is arranged between the second fixing ring 44 and the second magnetic steel 41, and the user of the second fixing ring 44 stably fixes the bass diaphragm 42 on the side cover 52, so that the strength of the overall structure of the sound generating device 10 is enhanced.

As a preferable real-time mode, the bass unit 40 further includes a passive radiation film 46 located between the bass vibration film 42 and the bottom cover 51, the passive radiation film 46 is disposed corresponding to the bass vibration film 42, an edge of the passive radiation film 46 is fixed on a second step 522 formed by the side cover 52, the second step 522 is located below the first step 521, the passive radiation film 46 is disposed at an interval with the bass vibration film 42 and the bottom cover 51, respectively, when the bass vibration film 42 vibrates, an air pressure generated by the bass vibration film 42 located between the passive radiation films 46 is compressed or expanded, and under an effect of a change in the air pressure, the passive radiation film 46 vibrates, so as to facilitate diffusion of low-frequency signals, improve a bass volume, and further reduce a resonance frequency by about 5% to 8%, which can effectively improve a low-frequency performance of the sound generating apparatus 10. The bottom cover 51 can protect the passive radiation film 46 and prevent the passive radiation diaphragm from being scratched or collided accidentally, and the vent holes 511 on the bottom cover 51 can dredge the air flow between the passive radiation film 46 and the bottom cover 51 in time to ensure the balance of the internal air pressure and the external air pressure. When the sound generating device 10 is assembled, the passive radiation film 46 and the bass vibration film 42 are fixed to the cover 50 in sequence, the second fixing ring 44 is fixed at the upper end of the edge of the bass vibration film 42, then the second washer 45 and the second magnetic steel 41 are fixed on the second fixing ring 44 in sequence, and then the magnetic yoke 20 is fixed on the second magnetic steel 41.

The sound generating device 10 of the present embodiment may have a cylindrical appearance, the first magnetic steel 31 is circular, the accommodating portion 21 is a circular groove, the second magnetic steel 41 may be circular, and the spacer is disposed at the periphery of the accommodating portion 21 to increase the magnetic flux of the bass unit 40. Of course, in other embodiments, the sound generating device 10 may also be a rectangular body, the first magnetic steel 31 is rectangular, and the second magnetic steel 41 is a rectangular ring structure.

In addition, the invention also provides a headset which comprises the sound production device 10. Since the earphone adopts all technical solutions of all the embodiments, at least all the beneficial effects brought by the technical solutions of the embodiments are achieved, and no further description is given here.

The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A sound generating device, the sound generating device comprising:

2. The sound generating apparatus as claimed in claim 1, wherein the yoke further includes a connecting portion extending outwardly from an end of the sidewall away from the bottom wall, and an edge of the tweeter diaphragm is fixed to the connecting portion by a first fixing ring.

3. The sound generating apparatus as claimed in claim 2, wherein the yoke further includes a surrounding portion circumferentially surrounding along an outer periphery of the connecting portion, and the second magnetic portion is fixed to a side of the surrounding portion facing away from the tweeter diaphragm.

4. The sounding device of claim 3, wherein the first magnetic portion includes a first magnetic steel and a first washer fixed to the first magnetic steel, the first magnetic steel is fixed to the bottom wall, the second magnetic portion includes a second magnetic steel and a second washer fixed to the second magnetic steel, the second magnetic steel is fixed to a side of the surrounding portion away from the high-pitch diaphragm, the high-pitch magnetic gap is formed between the first washer and the side wall, and the low-pitch magnetic gap is formed between the second washer and the side wall.

5. The sound generating apparatus as claimed in claim 3, wherein said surround portion is provided with sound emitting holes communicating with said low-pitched magnetic gap.

6. The sound generating apparatus of claim 1, wherein the tweeter diaphragm is a single metal layer.

7. The sound generating apparatus of claim 1, wherein the tweeter diaphragm includes a metal layer and a damping layer disposed outside the metal layer.

8. The sound production device as claimed in claim 1, wherein the high-pitched sound diaphragm has a thickness of 10 to 40 μm, and an elastic modulus of the high-pitched sound diaphragm is greater than or equal to 30 GPa.

9. The sound generating device according to any one of claims 1 to 8, further comprising a cover body provided with a vent hole, wherein the bass diaphragm is fixed on the cover body.

10. The sound generating apparatus as claimed in claim 9, wherein the cover body includes a bottom cover and a side cover connected to the bottom cover, the bottom cover is spaced apart from the bass diaphragm and has the vent, the side cover has a first step, and the bass diaphragm is fixed to the first step by a second fixing ring.

11. The sound generating apparatus as claimed in claim 10, wherein the bass unit further comprises a passive radiation film disposed between the bass diaphragm and the bottom cover, the passive radiation film being disposed corresponding to the bass diaphragm, and an edge of the passive radiation film being fixed to the second step formed by the side cover.

12. A headset characterized in that it comprises a sound-emitting device according to any one of claims 1 to 11.