WO2022110461A1

WO2022110461A1 - Sound production device

Info

Publication number: WO2022110461A1
Application number: PCT/CN2020/140081
Authority: WO
Inventors: 金鑫; 张帆; 沈凯华
Original assignee: 瑞声声学科技(深圳)有限公司; 瑞声科技(新加坡)有限公司
Priority date: 2020-11-30
Filing date: 2020-12-28
Publication date: 2022-06-02
Also published as: CN213938307U

Abstract

The present invention provides a sound production device, comprising a basket, and a vibration system and a magnetic circuit system that are separately fixed to the basket. The magnetic circuit system is provided with a magnetic gap; the vibration system comprises a vibration diaphragm fixed to the basket, a voice coil inserted in the magnetic gap to drive the vibration diaphragm to vibrate, and an elastic electrically conductive member fixed to the basket; the vibration diaphragm comprises a vibration part, a surround part extending from the vibration part and surrounding the vibration part, a fixing part connected to the surround part, and an extension part bent and extending from the fixing part to the magnetic circuit system; the extension part comprises a pair of long shaft parts and a pair of short shaft parts which are oppositely provided, first corner parts which are connected to the adjacent long shaft parts and short shaft parts, and second corner parts which are provided at intervals on the inner side of the first corner parts; the basket is sandwiched between the first corner parts and the second corner parts; and the elastic electrically conductive member is fixedly connected to the first corner parts, the second corner parts, and the basket. The basket of the sound production device can effectively support the elastic electrically conductive member, such that the elastic electrically conductive member is not easy to deform, and the performance of the sound production device is improved.

Description

sound device

technical field

The present invention relates to the field of acoustics and electricity, in particular to a sound-generating device.

Background technique

With the advent of the Internet era, the number of mobile terminal devices continues to rise. Among mobile devices, mobile phones are undoubtedly the most common and portable mobile terminal devices. Sound devices used to play music and other sounds are widely used in mobile terminal devices such as mobile phones, and the vibration system in the sound device is particularly important. The entire sound device vibrates through the vibration system to emit sound.

A related art sound-generating device includes a basin frame, a vibration system fixed on the basin frame, and a magnetic circuit system that drives the vibration system to vibrate and sound; the vibration system diaphragm, inserted in the magnetic gap to drive the vibration system. A voice coil vibrating with a diaphragm, a skeleton connected to the diaphragm and suspending the voice coil under the diaphragm, and an elastic conductive member connected to the side of the skeleton away from the diaphragm, the The voice coil includes a lead wire electrically connected to the elastic conductive member; the magnetic circuit system includes a magnetic yoke, a magnetic steel fixed to the magnetic yoke, the magnetic steel includes a main magnetic steel and a magnetic steel formed with the main magnetic steel The secondary magnet of the gap.

However, in the related art, the elastic conductive member is easily deformed after being pressed, resulting in poor contact and poor performance of the sound-emitting device.

Therefore, it is necessary to provide a new sound-generating device to solve the above problems.

technical problem

The purpose of the present invention is to provide a device that can effectively support the elastic conductive member, so that the elastic conductive member is not easily deformed, thereby improving the performance of the sound-emitting device.

technical solutions

In order to achieve the above object, the present invention provides a sound-emitting device, which includes a basin frame, a vibration system respectively fixed to the basin frame and a magnetic circuit system for driving the vibration system to vibrate and sound, and the magnetic circuit system has a magnetic gap, The vibration system includes a vibrating membrane fixed on the basin frame, a voice coil inserted in the magnetic gap to drive the vibrating membrane to vibrate, and an elastic conductive member fixed on the basin frame, and the vibrating membrane includes a vibrating part, a ring part extending from the vibrating part and surrounding the vibrating part, a fixing part connected with the ring part, and an extension part bent and extending from the fixing part to the magnetic circuit system; The extension part comprises a pair of oppositely arranged long shaft parts, a pair of oppositely arranged short shaft parts, and a corner part connecting the adjacent long shaft parts and the short shaft parts; the basin frame and the long shaft parts, The short shaft part and the corner part are connected; the corner part comprises a first corner part arranged on the outer side of the basin frame and a second corner part arranged on the inner side of the basin frame; the elastic conductive member is connected to the first corner part. The corner portion, the second corner portion, and the basin frame are fixedly connected.

Preferably, the basin frame includes a pair of long side parts arranged at intervals, a pair of short side parts arranged at intervals, and a corner part connecting the adjacent long side parts and the short side parts, and the corner parts are sandwiched between the adjacent long side parts and the short side parts. between the first corner portion and the second corner portion; the first corner portion, the second corner portion and the corner portion are fixedly connected to the elastic conductive member.

Preferably, the long shaft portion is provided with a first notch, the short shaft portion is provided with a second notch, each of the long side portions is accommodated in the first notch and is fixedly connected with the long shaft portion, each A short side portion is received in the second notch and is fixedly connected with the short shaft portion.

Preferably, a first pad is provided on a side of the elastic conductive member away from the vibrating membrane corresponding to the corner portion, and the corner portion is connected to the central area of the first pad.

Preferably, the vibrating membrane further includes a spherical top, the vibrating portion has a through hole, and the spherical top is located in the through hole and is spaced apart from the vibrating portion.

Preferably, the vibration system further includes a frame fixed to the vibrating membrane, the frame includes a bottom wall fixed to the vibrating part and a side wall bent and extended from the bottom wall toward the magnetic circuit system , the bottom wall is connected to the vibrating part and the dome; the end of the side wall away from the vibrating membrane is fixedly connected to the voice coil and the elastic conductive member.

Preferably, the bottom wall is annular, and the side wall includes a first side wall bent and extended from the outer periphery of the bottom wall toward the magnetic circuit system, and a first side wall extending from the inner periphery of the bottom wall to the magnetic circuit system. The second side wall is bent and extended in the direction of the circuit system; the first side wall is connected with the elastic conductive member, the second side wall is connected with the voice coil, and the first side wall is connected with the voice coil Oppositely spaced, the bottom wall, the first side wall and the voice coil together form the receiving space.

Preferably, the elastic conductive member includes an elastic conductive body connected to the end of the basin frame and the skeleton away from the vibrating membrane, and a flexible conductive body bent and extended from the elastic conductive body to the receiving space along the skeleton. A connecting arm and a second pad connected to the connecting arm, the second pad being fixedly connected to the side of the bottom wall away from the vibrating membrane.

Preferably, the connecting arm includes a first bending portion that is bent and extended from the elastic conductive body to the bottom wall, and a second bending portion that is bent and extended from the first bending portion to the voice coil. part; the second pads include two, which are located on both sides of the second bending part respectively and are connected with the second bending part, the first bending part is parallel to the first side wall The second bending portion and the second solder pad are both connected to the side of the bottom wall close to the voice coil.

beneficial effect

Compared with the related art, in the sound-emitting device of the present invention, the vibrating film includes a vibrating portion, a ring portion extending from the vibrating portion and surrounding the vibrating portion, a fixing portion connected with the ring portion, and a ring portion extending from the vibrating portion and surrounding the vibration portion. The extension part is bent and extended toward the magnetic circuit system; the extension part includes a pair of oppositely arranged long-axis parts, a pair of oppositely arranged short-axis parts, connecting adjacent long-axis parts and short-axis parts The first corner portion of the device, and the second corner portion arranged at intervals inside the first corner portion; the corner portion is sandwiched between the first corner portion and the second corner portion; the elastic conductive member Fixed connection with the first corner portion, the second corner portion, and the corner portion; since the corner portion is arranged in the central area above the first pad of the elastic conductive member, the corner portion can The first pad is effectively supported, so that the height and shape of the first pad will not change after being pressed, and the reliability and acoustic performance of the sound-emitting device are improved.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort, among which.

FIG. 1 is a schematic diagram of a structural explosion of a sound-emitting device of the present invention.

FIG. 2 is a schematic diagram of the assembly of the vibrating membrane and the basin frame of the sound-emitting device of the present invention.

FIG. 3 is a schematic diagram of the structure of the diaphragm of the sound-emitting device of the present invention.

FIG. 4 is a schematic diagram of part of the assembly of the sound-emitting device of the present invention.

FIG. 5 is a schematic diagram of the assembly of the basin frame and the elastic conductive member of the sound-emitting device of the present invention.

FIG. 6 is a schematic diagram of the three-dimensional structure of the sound-emitting device of the present invention.

FIG. 7 is a cross-sectional view taken along line A-A of FIG. 6 .

FIG. 8 is a B-B sectional view in FIG. 6 .

FIG. 9 is a schematic diagram of the assembly of the second magnetic conductive plate and the elastic conductive member of the sounding device of the present invention.

Embodiments of the present invention

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. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Referring to FIGS. 1-9 , the present invention provides a sound-generating device 100 . The sound-generating device 100 includes a basin frame 1 , a vibration system respectively fixed to the basin frame 1 , and a magnetic circuit system for driving the vibration system to vibrate and emit sound. 3. The magnetic circuit system 3 has a magnetic gap 30 .

Specifically, the vibration system includes a diaphragm 21 fixed to the basin frame 1 , a voice coil 22 inserted in the magnetic gap 30 to drive the diaphragm 21 to vibrate, and a frame connected to the diaphragm 21 23. The elastic conductive member 24 fixed to the basin frame 1 and connected to the side of the frame 23 away from the diaphragm 21 and the auxiliary fixed to the side of the elastic conductive member 24 away from the diaphragm 21 The diaphragm 25 , the frame 23 and the voice coil 22 together form the receiving space 10 .

The vibrating membrane 21 includes a vibrating portion 211 having a through hole 2110 , a ring portion 212 extending from the periphery of the vibrating portion 211 and surrounding the vibrating portion 211 , and the ring portion 212 is away from the vibrating portion 211 . One side is bent and extended and fixed on the fixing part 213 of the basin frame 1 , the extension part 214 and the dome 215 which are bent and extended from the fixing part 213 to the magnetic circuit system 3 ; the vibrating part 211 surrounds The domes 214 are spaced apart from each other.

The extension portion 214 includes a pair of oppositely arranged long shaft portions 2140, a pair of oppositely arranged short shaft portions 2141, and a corner portion 2142 connecting adjacent long shaft portions 2140 and short shaft portions 2141; the basin frame 1 is connected to the long shaft portion 2140 , the short shaft portion 2141 , the fixing portion 213 and the corner portion 2142 .

The corner portion 2142 includes a first corner portion 2142a formed by bending and extending from the outer edge of the fixing portion 213 , and a second corner portion extending from the side of the fixing portion 213 close to the ring portion 212 toward the magnetic circuit system 3 . 2142b, that is, the first corner portion 2142a and the second corner portion 2142b are arranged in parallel and spaced apart; the basin frame 1 is sandwiched between two corners at the corresponding positions of the first corner portion 2142a and the second corner portion 2142b. Between them, the reliability of the sounding device is improved; the elastic conductive member 24 is fixedly connected to the first corner portion 2142 a , the second corner portion 2142 b , and the basin frame 1 .

The long shaft portion 2140 defines a first notch 2144 , and the short shaft portion 2141 defines a second notch 2145 .

The basin frame 1 includes a pair of long side portions 10 arranged at intervals, a pair of short side portions 11 arranged at intervals, and a corner portion 12 connecting the adjacent long side portions 10 and short side portions 11 . 12 is sandwiched between the first corner portion 2142 a and the second corner portion 2142 b ; the short side portion 11 , the corner portion 12 and the elastic conductive member 24 are fixedly connected.

The long side portion 10 is accommodated in the first notch 2144 and is fixedly connected with the long shaft portion 2140 , and the short side portion 11 is accommodated in the second notch 2145 and is fixedly connected with the short shaft portion 2141 .

The voice coil 22 is racetrack-shaped and has two leads 220 .

The frame 23 includes an annular bottom wall 231 fixed to the vibrating portion 211 , and a side wall 232 bent and extended from the bottom wall 231 toward the magnetic circuit system 3 .

Specifically, the side wall 232 includes a first side wall 2321 bent and extended from the outer periphery of the bottom wall 231 toward the magnetic circuit system 3 , and a first side wall 2321 extending from the inner periphery of the bottom wall 231 to the magnetic circuit system 3 . The second side wall 2322 is bent and extended in the direction. The first side wall 2321 includes two and is disposed at intervals on opposite sides of the short axis of the voice coil 22 . The second side wall 2322 is annular and connected to the voice coil 22 . The wall 2322 is connected to one end of the voice coil 22 close to the diaphragm 21 , and this design improves the reliability of the sounding device.

The first side wall 2321 is spaced apart from the voice coil 22 , and the bottom wall 231 , the first side wall 2321 and the voice coil 22 together define the receiving space 10 .

Specifically, the bottom wall 231 is located between the dome 214 and the vibrating part 211 and connects the vibrating part 211 and the dome 214 to form an integral structure, which has better reliability.

The elastic conductive members 24 include two and are respectively disposed on the two short axis sides of the voice coil 22 . The elastic conductive member 24 includes an elastic conductive body 241 fixed to the basin frame 1 and connected to the end of the frame 23 away from the diaphragm 21 . The connecting arm 242 bent and extended in the space 10 and the second pad 243 connected to the connecting arm 242, the lead 220 of the voice coil 22 and the second pad 243 are fixed on the side away from the diaphragm 21 electrical connection.

Specifically, the connection arm 242 includes a first connection arm 2421 that is bent and extended from the elastic conductive body 241 along the first side wall 2321 to the bottom wall 231 and located in the receiving space 10 , The first connecting arm 2421 is a second connecting arm 2422 that is bent and extended along the bottom wall 231 toward the voice coil 22; Both sides are fixedly connected with the second connecting arm 2422 .

The first connecting arm 2421 and the first side wall 2321 are spaced and arranged parallel to each other. side.

The elastic conductive body 241 includes a first body portion 2411 fixed to the side of the basin frame 1 away from the diaphragm 21 , and a second body portion fixed to the end of the first side wall 2321 away from the diaphragm 21 . 2413 and two elastic arms 2412 connecting the first body portion 2411 and the second body portion 2413 ; the connecting arms 242 are formed by bending and extending from the second body portion 2413 .

At the corresponding position of the corner portion 12, two first pads 2410 are disposed on the side of the first body portion 2411 away from the diaphragm 21; the corner portion 12, the first corner portion 2142a, the The second corner portion 2142b is fixedly connected with the first body portion 2411, and the corner portion 12 is located in the central area above the first pad 2410, so the corner portion 12 can effectively support the first pad 2410, Therefore, the height and shape of the first pad 2410 after being pressed will not change, which improves the reliability and acoustic performance of the sound-emitting device.

The auxiliary diaphragm 25 is attached to the side of the elastic conductive member 24 away from the diaphragm 21 .

The magnetic circuit system 3 includes a magnetic yoke 31 , a main magnetic steel 32 fixed on the magnetic yoke 31 , and a magnetic gap 30 formed around the main magnetic steel 32 and spaced from the main magnetic steel 32 . The side magnetic steel 33, the first magnetic conductive plate 34 covered and fixed on the main magnetic steel 32, and the second magnetic conductive plate 35 covered and fixed on the side magnetic steel 33, the second magnetic conductive plate 35 is fixedly connected to the side of the basin frame 1 away from the diaphragm 21 , and the second magnetic conductive plate 35 is provided with an escape portion at the corresponding position of the first connecting portion 2423 and the second connecting portion 2424 350, so that when the sounding device vibrates and emits sound, the second magnetic conducting plate 35 will not collide with the first connecting part 2423 and the second connecting part 2424, and will not affect the electrical connection between the two and the lead 2211 , which improves the safety of the generating device.

Compared with the related art, in the sound-emitting device of the present invention, the vibrating film includes a vibrating portion, a ring portion extending from the vibrating portion and surrounding the vibrating portion, a fixing portion connected with the ring portion, and a ring portion extending from the vibrating portion and surrounding the vibration portion. The extension part is bent and extended toward the magnetic circuit system; the extension part includes a pair of oppositely arranged long-axis parts, a pair of oppositely arranged short-axis parts, connecting adjacent long-axis parts and short-axis parts The first corner portion of the device, and the second corner portion arranged at intervals inside the first corner portion; the corner portion is sandwiched between the first corner portion and the second corner portion; the elastic conductive member Fixed connection with the first corner portion, the second corner portion, and the corner portion; since the corner portion is located in the central area above the first pad, the corner portion can effectively support the first pad , so that the height and shape of the first pad will not change after being pressed, which improves the reliability and acoustic performance of the sound-emitting device.

The present invention provides one embodiment of the present invention as described above, which is not intended to limit the scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied In other related technical fields, they are all included within the scope of patent protection of the present invention.

Claims

A sound-generating device comprising a basin frame, a vibration system respectively fixed to the basin frame and a magnetic circuit system for driving the vibration system to vibrate and emit sound, the magnetic circuit system having a magnetic gap, and the vibration system comprising The vibrating membrane of the basin frame, the voice coil inserted in the magnetic gap to drive the vibrating membrane to vibrate, and the elastic conductive member fixed to the basin frame, are characterized in that:

The vibrating film includes a vibrating part, a ring part extending from the vibrating part and surrounding the vibrating part, a fixing part connected with the ring part, and bending and extending from the fixing part to the magnetic circuit system The extension part; the extension part includes a pair of oppositely arranged long shaft parts, a pair of oppositely arranged short shaft parts, and a corner part connecting the adjacent long shaft parts and short shaft parts; The long axis part, the short axis part and the corner part are connected;

The corner portion includes a first corner portion arranged on the outer side of the basin frame and a second corner portion arranged on the inner side of the basin frame; the elastic conductive member is connected to the first corner portion and the second corner portion. The part and the basin frame are fixedly connected.
The sound-generating device according to claim 1, wherein the basin frame comprises a pair of long side portions arranged at intervals, a pair of short side portions arranged at intervals, and a pair of adjacent long side portions and short side portions connected to each other. The corner portion is sandwiched between the first corner portion and the second corner portion; the first corner portion, the second corner portion and the corner portion are fixedly connected to the elastic conductive member .
The sound-generating device according to claim 2, wherein the long-axis portion is provided with a first notch, the short-axis portion is provided with a second notch, and each of the long-side portions is accommodated in the first notch. The notch is fixedly connected with the long shaft portion, and each of the short side portions is accommodated in the second notch and fixedly connected with the short shaft portion.
The sound-generating device according to claim 3, wherein a first pad is provided on a side of the elastic conductive member away from the vibrating membrane corresponding to the corner portion, and the corner portion is connected to the first pad. A pad center area.
The sound-generating device according to claim 1, wherein the diaphragm further comprises a spherical top, the vibration part has a through hole, and the spherical top is located in the through hole and is spaced apart from the vibration part.
The sound-generating device according to claim 5, wherein the vibration system further comprises a frame fixed to the vibrating membrane, the frame comprising a bottom wall fixed to the vibrating part and a bottom wall extending from the bottom wall to the frame. The side wall is bent and extended in the direction of the magnetic circuit system, and the bottom wall connects the vibrating part and the dome; the end of the side wall away from the diaphragm is connected with the voice coil and the elastic conductive member Fixed connection.
The sounding device according to claim 6, wherein the bottom wall is annular, and the side wall comprises a first side wall that is bent and extended from the outer periphery of the bottom wall toward the magnetic circuit system and a second side wall bent and extended toward the magnetic circuit system from the inner periphery of the bottom wall; the first side wall is connected with the elastic conductive member, and the second side wall is connected with the voice coil , the first side wall is opposite to the voice coil at an interval, and the bottom wall, the first side wall and the voice coil together enclose the receiving space.
The sound-generating device according to claim 7, wherein the elastic conductive member comprises an elastic conductive body connected to an end of the basin frame and the frame away from the vibrating membrane, and the elastic conductive body is formed along the edge of the elastic conductive body. A connecting arm bent and extended from the skeleton into the accommodating space and a second pad connected with the connecting arm, and the second pad is fixedly connected to a side of the bottom wall away from the vibrating membrane.
The sound-generating device according to claim 8, wherein the connecting arm comprises a first bending portion bent and extended from the elastic conductive body to the bottom wall, and the first bending portion extends toward the bottom wall. A second bending portion of the voice coil is bent and extended; the second pad includes two, which are respectively located on both sides of the second bending portion and are connected with the second bending portion, and the first A bent portion is arranged in parallel with the first side wall and spaced apart, and the second bent portion and the second pad are both connected to a side of the bottom wall close to the voice coil.