WO2021128337A1

WO2021128337A1 - Sound production device

Info

Publication number: WO2021128337A1
Application number: PCT/CN2019/129410
Authority: WO
Inventors: 宋威; 张帆; 金鑫
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: 2019-12-27
Filing date: 2019-12-27
Publication date: 2021-07-01

Abstract

The present utility model provides a sound production device, comprising a basket, a vibration system, and a magnetic circuit system having a magnetic gap which are separately fixed to the basket. The vibration system comprises a diaphragm, a voice coil inserted into the magnetic gap to drive the diaphragm to vibrate, a framework connected to the diaphragm, and an elastic conductive member connected to one side of the framework distant from the diaphragm. The framework and the voice coil enclose an accommodating space. The elastic conductive member comprises an elastic conductive member body connected to the end of the framework distant from the diaphragm, and a connection wall bent and extending from the elastic conductive member body to the interior of the accommodating space along the framework. A lead wire of the voice coil is fixedly and electrically connected to the connection wall. Compared with the related art, the sound production device of the present utility model has a higher space utilization rate and better performance.

Description

Sound device

Technical field

The utility model relates to the field of sound and electricity, in particular to a sound emitting 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 most 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, and the entire sound device vibrates and produces sound through the vibration system.

Related art sound generating devices include a basin frame, a vibration system fixed on the basin frame, and a magnetic circuit system that drives the vibration system to vibrate and produce sound; the vibration system diaphragm is inserted into the magnetic gap to drive the vibration A voice coil with a diaphragm vibrating, a skeleton connected to the diaphragm and supporting the voice coil suspended 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, and the magnetic steel includes a main magnetic steel and forms a magnetic field with the main magnetic steel. The secondary magnet of the gap.

technical problem

However, in the related art, the elastic conductive member occupies the space of the magnetic circuit system, resulting in a small space of the magnetic steel and poor performance.

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

Technical solutions

The purpose of the utility model is to provide a sound device with high space utilization rate, large magnetic circuit volume and better performance.

In order to achieve the above objective, the present invention provides a sound generating device, which includes a basin frame, a vibration system respectively fixed to the basin frame, and a magnetic circuit system that drives the vibration system to vibrate and produce sound, the magnetic circuit system having a magnetic gap The vibration system includes a diaphragm fixed to the basin frame, a voice coil inserted in the magnetic gap to drive the diaphragm to vibrate, a skeleton connected to the diaphragm, and a frame fixed to the basin frame. An elastic conductive member connected to the side of the frame away from the diaphragm,

The frame and the voice coil jointly enclose an accommodation space, and the elastic conductive element includes an elastic conductive element body fixed to the basin frame and connected to an end of the frame away from the diaphragm. The main body is a connecting wall bent and extended along the frame into the receiving space, and the lead wire of the voice coil is fixedly and electrically connected to the second connecting wall.

Preferably, the frame includes a bottom wall fixed to the diaphragm and a side wall bent and extended from the bottom wall in the direction of the magnetic circuit system, and one end of the side wall away from the diaphragm and the The elastic conductive member body is fixedly connected.

Preferably, the bottom wall is ring-shaped, 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 toward the magnetic circuit. The second side wall is bent and extended in the direction of the circuit system; the first side wall is connected to the elastic conductive body, the second side wall is connected to the voice coil, and the first side wall is connected to the sound coil. The coils are spaced opposite each other, and the bottom wall, the first side wall, and the voice coil jointly enclose the receiving space.

Preferably, the connecting wall includes a first connecting wall that is bent and extends from the elastic conductive body along the first side wall to the bottom wall and is located in the accommodating space, and is connected by the first connecting wall. The wall is bent and extended toward the second connecting wall in the direction of the voice coil, and the lead wire of the voice coil is fixed and electrically connected to the second connecting wall.

Preferably, the second connecting wall is attached to a side of the bottom wall close to the voice coil.

Preferably, the voice coil has a racetrack shape, the first side wall includes two and is arranged at intervals on opposite sides of the short axis of the voice coil, the second side wall has a ring shape, and the second side The wall is connected with one end of the voice coil close to the diaphragm.

Preferably, the elastic conductive member includes two, and they are respectively arranged on the two short axis sides of the voice coil.

Preferably, the elastic conductive body includes a first fixing portion fixed to the side of the basin frame away from the diaphragm, a second fixing portion fixed to the end of the first side wall away from the diaphragm, and a connection The elastic arms of the first fixing part and the second fixing part; the connecting wall is formed by bending and extending the second fixing part.

Preferably, the vibration system further includes an auxiliary diaphragm attached to a side of the elastic conductive member away from the diaphragm.

Preferably, the magnetic circuit system includes a magnetic yoke, a main magnetic steel fixedly arranged on the magnetic yoke, a side magnetic steel arranged around the main magnetic steel and separated from the main magnetic steel to form the magnetic gap, Covered with a first magnetic conductive plate fixed on the main magnetic steel and a second magnetic conductive plate fixed on the side magnetic steel, the second magnetic conductive plate and the basin frame are away from the vibration One side of the membrane is fixedly connected.

Preferably, the vibrating membrane includes a vibrating part with a through hole, a folding ring part extending from the periphery of the vibrating part and surrounding the vibrating part, and a side of the folding ring part away from the vibrating part is bent Extending and fixed to the fixing part of the basin frame and the dome; the vibrating part surrounds the dome and is spaced apart from each other, the bottom wall is located between the dome and the vibrating part, and the vibration The part is connected with the dome to form an integral structure.

Preferably, the first connecting wall and the first side wall are spaced and arranged in parallel.

Beneficial effect

Compared with the related art, in the sound generating device of the present invention, the elastic conductive member includes an elastic conductive member body fixed to the basin frame and connected to the end of the frame away from the diaphragm, and is composed of the elastic conductive member body. A connecting wall that is bent and extended into the accommodating space along the bottom wall frame, and the lead wire of the voice coil is fixed and electrically connected to the connecting wall; that is, the connecting wall is arranged along the inner side of the frame to reduce the The space occupied by the elastic conductive element can increase the space of the magnetic circuit system, and the space utilization rate is high; the volume of the magnetic circuit system is increased, and the performance of the sound device is better.

Description of the drawings

In order to more clearly explain the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings needed in the description of the embodiments. Obviously, the drawings in the following description are only some implementations of the present utility model. For example, for those of ordinary skill in the art, without creative work, other drawings can be obtained based on these drawings, among which:

Figure 1 is a schematic diagram of the three-dimensional structure of the sound device of the utility model

Figure 2 is an exploded schematic diagram of the three-dimensional structure of the sound generating device of the present invention;

Figure 3 is a cross-sectional view of the utility model along the line A-A in Figure 1;

Figure 4 is an enlarged schematic diagram of B in Figure 3 of the utility model;

Figure 5 is a partial assembly diagram of the utility model.

Embodiments of the present invention

The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with 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. Examples. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the scope of protection of the present utility model.

Please refer to Figures 1-4, the present invention provides a sounding device 100, the sounding device 100 includes a basin frame 1, a vibration system 2 fixed to the basin frame 1, and a magnetic drive the vibration system to vibrate and produce sound. The magnetic circuit system 3 has a magnetic gap 30.

Specifically, the vibration system 2 includes a diaphragm 21 fixed to the frame 1, a voice coil 22 inserted in the magnetic gap 30 to drive the diaphragm 21 to vibrate, and a diaphragm 21 connected to the diaphragm 21. A frame 23, an elastic conductive member 24 fixed to the basin frame 1 and connected to a side of the frame 23 away from the diaphragm 21, and an auxiliary diaphragm 25, the frame 23 and the voice coil 22 jointly enclose The containing space 10.

The diaphragm 21 includes a vibration part 211 having a through hole 2110, a folding ring part 212 extending from the periphery of the vibration part 211 and surrounding the vibration part 211, and a folding ring part 212 away from the vibration part 211 One side of is bent and extended and fixed to the fixing portion 213 and the dome 214 of the basin frame 1; the vibrating portion 211 surrounds the dome 214 and is spaced apart from each other.

The voice coil 22 is inserted in the magnetic gap 30 and has a racetrack shape.

The frame 23 includes a ring-shaped bottom wall 231 fixed to the diaphragm 21, and a side wall 232 bent and extended from the bottom wall 231 in the direction of 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 toward 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 arranged at intervals on opposite sides of the short axis of the voice coil 22, the second side wall 2322 is ring-shaped and connected to the voice coil 22, and the second side The wall 2322 is connected to an end of the voice coil 22 close to the diaphragm 21.

The first side wall 2321 is opposite to the voice coil 22 at intervals, and the bottom wall 231, the first side wall 2321 and the voice coil 22 collectively enclose 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 into an integral structure, which is more reliable.

The elastic conductive member 24 includes two, and they are respectively arranged on the two short axis sides of the voice coil 22. The elastic conductive member 24 includes an elastic conductive member body 241 fixed to the basin frame 1 and connected to an end of the frame 23 away from the diaphragm 21. The elastic conductive member body 241 is arranged along the direction of the frame 23. The connecting wall 242 is bent and extended in the receiving space 10, and the lead wire of the voice coil 22 is fixedly and electrically connected to the connecting wall 242.

Specifically, the connecting wall 242 includes a first connecting wall 2421 bent and extending from the elastic conductive body 241 along the first side wall 2321 toward the bottom wall 231 and located in the receiving space 10, and The second connecting wall 2422 is bent and extended in the direction of the voice coil 22 from the first connecting wall 2421, and the lead wire of the voice coil 22 is fixedly electrically connected to the second connecting wall 2422.

The first connecting wall 2421 and the first side wall 2321 are arranged in parallel and spaced apart, and the second connecting wall 2422 is attached to a side of the bottom wall 231 close to the voice coil 22.

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

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 fixedly arranged 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. A side magnet 33, a first magnetic conductive plate 34 covered and fixed on the main magnet 32, and a second magnetic conductive plate 35 covered and fixed on the side magnet 33, the second magnetic conductive plate 35 is fixedly connected to the side of the basin frame 1 away from the diaphragm 21.

4 and 5, it can be seen that since the first connecting wall 2421 is bent and extended in the direction of the first side wall 2321, the second connecting wall 2422 is bent in the direction of the bottom wall 231 In an extended configuration, the connecting wall 242 occupies a small space, increases the space of the magnetic circuit system 3, and has a high space utilization rate.

Compared with the related art, in the sound device of the present invention, the elastic conductive member includes an elastic conductive member body fixed to the basin frame and connected with the end of the frame away from the diaphragm, and the elastic conductive member body is A connecting wall that is bent and extended into the accommodating space along the bottom wall frame, and the lead wire of the voice coil is fixed and electrically connected to the connecting wall; that is, the connecting wall is arranged along the inner side of the frame to reduce the The space occupied by the elastic conductive element can increase the space of the magnetic circuit system, and the space utilization rate is high; the volume of the magnetic circuit system is increased, and the performance of the sound device is better.

This utility model provides an embodiment of the utility model described above, which does not limit the scope of the utility model's patent. Any equivalent structure or equivalent process transformation made by using the content of the utility model description and drawings, or Directly or indirectly used in other related technical fields are included in the scope of patent protection of the utility model for the same reason.

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 produce sound. The magnetic circuit system has a magnetic gap, and the vibration system includes The diaphragm of the basin frame, a voice coil inserted in the magnetic gap to drive the diaphragm to vibrate, a frame connected to the diaphragm, and a frame fixed to the frame and away from the frame The elastic conductive member connected to one side of the, characterized in that:

The frame and the voice coil jointly enclose an accommodation space, and the elastic conductive element includes an elastic conductive element body fixed to the basin frame and connected to an end of the frame away from the diaphragm. The main body is bent and extended along the frame into the connecting wall, and the lead wire of the voice coil is fixed and electrically connected to the connecting wall.
The sounding device according to claim 1, wherein the frame includes a bottom wall fixed to the diaphragm and a side wall bent and extended from the bottom wall in the direction of the magnetic circuit system, the One end of the side wall away from the diaphragm is fixedly connected to the elastic conductive member body.
The sounding device according to claim 2, wherein the bottom wall is ring-shaped, and the side wall includes a first side wall bent and extended from the outer periphery of the bottom wall in the direction of the magnetic circuit system And a second side wall bent and extended from the inner periphery of the bottom wall in the direction of the magnetic circuit system; the first side wall is connected to the elastic conductive member body, and the second side wall is connected to the voice coil In connection, the first side wall is opposed to the voice coil at intervals, and the bottom wall, the first side wall and the voice coil jointly enclose the receiving space.
The sounding device according to claim 3, wherein the connecting wall comprises the elastic conductive member body bent and extended along the first side wall toward the bottom wall and is located in the receiving space The first connecting wall and the second connecting wall bent and extended from the first connecting wall in the direction of the voice coil, and the lead wire of the voice coil is fixed and electrically connected to the second connecting wall.
The sounding device according to claim 4, wherein the second connecting wall is attached to a side of the bottom wall close to the voice coil.
The sounding device according to claim 4, wherein the voice coil has a racetrack shape, the first side wall includes two and is arranged at intervals on opposite sides of the short axis of the voice coil, and the first side wall The two side walls are ring-shaped, and the second side wall is connected to an end of the voice coil close to the diaphragm.
The sounding device according to claim 3, wherein the elastic conductive member comprises two, and they are respectively arranged on the two short axis sides of the voice coil.
8. The sounding device according to claim 8, wherein the elastic conductive member body comprises a first fixing portion fixed on the side of the basin frame away from the diaphragm, and fixed on the first side wall away from the diaphragm. A second fixing portion at one end of the diaphragm and an elastic arm connecting the first fixing portion and the second fixing portion; the connecting wall is formed by bending and extending the second fixing portion.
9. The sound generating device according to claim 9, wherein the vibration system further comprises an auxiliary diaphragm attached to a side of the elastic conductive member away from the diaphragm.
The sounding device according to claim 1, wherein the magnetic circuit system includes a magnetic yoke, a main magnetic steel fixedly arranged on the magnetic yoke, arranged around the main magnetic steel and connected to the main magnetic The side magnets forming the magnetic gap between the steels, the first magnetic conductive plate covered and fixed on the main magnetic steel, and the second magnetic conductive plate covered and fixed on the side magnetic steel, the second The magnetic conductive plate is fixedly connected with the side of the basin frame away from the diaphragm.
The sound generating device according to claim 2, wherein the diaphragm includes a vibrating portion having a through hole, a folding ring portion extending from the periphery of the vibrating portion and surrounding the vibrating portion, and The ring portion is bent and extended on one side away from the vibration portion and fixed to the fixing portion of the basin frame and the dome; the vibrating portion surrounds the dome and is arranged at intervals with each other, and the bottom wall is located on the dome And the vibrating part and connecting the vibrating part and the dome to form an integral structure.
The sound emitting device according to claim 4, wherein the first connecting wall and the first side wall are spaced and arranged in parallel.