WO2021114122A1

WO2021114122A1 - Sound production device

Info

Publication number: WO2021114122A1
Application number: PCT/CN2019/124449
Authority: WO
Inventors: 邵益
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: 2019-12-11
Filing date: 2019-12-11
Publication date: 2021-06-17

Abstract

Provided is a sound production device comprising a basket frame, a vibration system fixed to the basket frame, and a magnetic circuit system driving the vibration system to vibrate, wherein the vibration system comprises a first vibrating diaphragm fixed to the basket frame, a voice coil for driving the first vibrating diaphragm to vibrate, and an elastic conductive member for supporting the voice coil on the basket frame; the magnetic circuit system comprises a magnet yoke fixed to the basket frame, main magnetic steel fixed to the magnet yoke, and auxiliary magnetic steel arranged around the main magnetic steel; the auxiliary magnetic steel and the main magnetic steel are spaced to form a magnetic gap, and the voice coil is arranged in the magnetic gap; the elastic conductive member comprises a first fixed arm fixed to the basket frame, a second fixed arm fixed to the voice coil, and an elastic arm connecting the first fixed arm and the second fixed arm; the second fixed arm comprises a supporting part attached to the voice coil, an electric connecting part extending from the supporting part towards a direction away from the basket frame to a containing range defined by the voice coil, and a bonding pad arranged on the electric connecting part; and the voice coil is electrically connected to the bonding pad. Compared with the related art, the sound production device in the present utility model has better reliability.

Description

Sound device

Technical field

The utility model relates to the field of sound and electricity, in particular to a sound device using portable electronic products.

Background technique

With the advent of the mobile Internet era, the number of smart mobile devices continues to rise. Among many mobile devices, mobile phones are undoubtedly the most common and most portable mobile terminal devices. Sound-producing devices used to play sounds are widely used in current smart mobile devices such as mobile phones.

A related art sounding device includes a basin frame, a vibration system fixed to the basin frame, a vibration system fixed to the basin frame, and a magnetic circuit system that drives the vibration system to vibrate; the vibration system includes The first diaphragm of the basin frame, the voice coil that drives the first diaphragm to vibrate, and the elastic conductive member; the magnetic circuit system includes a magnetic yoke fixed to the basin frame, and a main body fixed to the magnetic yoke. A magnetic steel and a plurality of mutually spaced auxiliary magnetic steels arranged around the main magnetic steel, the auxiliary magnetic steel and the main magnetic steel are spaced to form a magnetic gap, and the voice coil is inserted in the magnetic gap. The elastic conductive member includes a first fixing part fixed to the basin frame, a second fixing part electrically connected to the voice coil, and a vibrating arm connecting the first fixing part and the second fixing part.

technical problem

However, in the related art, the second fixing portion is located in the gap between the voice coil and the basin frame, which occupies the space of the vibrating arm, so that the length of the vibrating arm becomes smaller, resulting in the The reliability of the sound device is not good.

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 better reliability.

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; the vibration system includes The first diaphragm of the basin frame, the voice coil that drives the first diaphragm to vibrate, and the elastic conductive member that supports the voice coil on the frame; the magnetic circuit system includes a magnetic A yoke, a main magnet fixed to the yoke, and a plurality of mutually spaced auxiliary magnets arranged around the main magnet, the auxiliary magnets forming a magnetic gap with the main magnet, the voice coil Inserted in the magnetic gap; the elastic conductive member includes a first fixed arm fixed to the basin frame, a second fixed arm fixed to an end of the voice coil away from the first diaphragm, and connected to the The elastic arm of the first fixed arm and the second fixed arm; the second fixed arm includes a support portion that is attached and fixed to the voice coil, and extends from the support portion in a direction away from the basin frame to the The electrical connection portion within the accommodating range enclosed by the voice coil and the pad provided on the electrical connection portion, and the voice coil is electrically connected to the pad.

Preferably, the vibration system further includes a second diaphragm attached to a side of the elastic conductive member away from the first diaphragm, and the second diaphragm includes a first diaphragm fixed to the first fixed arm. A connecting portion, a second connecting portion attached to the second fixed arm, and a folding ring portion connecting the first connecting portion and the second connecting portion, the folding ring portion and the elastic arm are directly opposite and Interval settings.

Preferably, the voice coil has a rectangular structure, and the sub-magnets include two first sub-magnets parallel to the long axis of the voice coil and two second sub-magnets parallel to the short axis of the voice coil, The elastic conductive member includes four and is respectively located at the four corners of the voice coil.

Preferably, the first fixed arms of the two elastic conductive members located on the same side of the short axis of the voice coil are connected to each other.

Preferably, the main magnetic steel is provided with a groove recessed inward from its periphery, and the groove matches the electrical connection part and is used for accommodating the electrical connection part.

Preferably, the number of the second diaphragms is four, and they are respectively arranged opposite to the four elastic arms.

Preferably, the folding ring portion has an arc structure bent in a direction away from the elastic arm.

Preferably, the yoke includes an escape groove formed by a side close to the folding ring portion and a side away from the folding ring portion; the escape groove is disposed directly opposite to the folding ring portion.

Beneficial effect

Compared with the related art, the present utility model arranges the second fixing part of the elastic conductive member in the accommodating range enclosed by the voice coil to prevent the electrical connection part from occupying the outer side of the voice coil and the basin frame. And the space outside the voice coil is left to the elastic arm, making the length of the elastic arm greater; the increase in length can increase the reliability of the elastic conductive member, thereby increasing the Reliability of sound device.

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 partial three-dimensional exploded structure diagram of the sound device of the present invention;

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

Figure 3 is a partial assembly schematic diagram of the sound generating device of the utility model;

Figure 4 is an enlarged schematic diagram of the elastic conductive member of the present invention.

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 FIGS. 1-4 at the same time. The present invention provides a sound generating device 100, which includes a basin frame 1, a vibration system 2 and a magnetic circuit system 3.

The vibration system 2 is fixed to the basin frame 1, and includes a first diaphragm 21 fixed to the basin frame 1, a voice coil 22 that drives the first diaphragm 21 to vibrate, and supports the voice coil 22 The elastic conductive member 23 and the second diaphragm 24 on the basin frame 1.

The elastic conductive member 23 supports the voice coil 22 on the basin frame 1, and includes a first fixed arm 231 fixed on the basin frame 1, and fixed on the voice coil 22 away from the first diaphragm. The second fixed arm 232 at one end of 21 and the elastic arm 233 connecting the first fixed arm 231 and the second fixed arm 232.

The voice coil 22 has a rectangular structure, and the elastic conductive member 23 includes four elastic conductive members 23 located at the four corners of the voice coil 22. The two elastic conductive members 23 are located on the same side of the short axis of the voice coil 22. The first fixing arms 231 of the conductive member 23 are connected to each other to increase the reliability of the first fixing arms 231.

The second fixed arm 232 includes a supporting portion 2321 that is attached and fixed to the voice coil 22 and extends from the supporting portion 2321 in a direction away from the basin frame 1 to a receiving area enclosed by the voice coil 22 The electrical connection portion 2322 of the, and the pad 2323 provided on the electrical connection portion 2322, and the voice coil 22 is electrically connected to the pad 2323. That is, the orthographic projection of the electrical connection portion 2322 to the voice coil 22 along the vibration direction of the first diaphragm 21 completely falls within the accommodating range enclosed by the voice coil 22; that is to say, the electrical connection portion 2322 does not at all. Occupy the gap between the voice coil 22 and the frame 1, the elastic arm 233 has enough gap to set its length; the greater the length of the elastic arm 233, the better the reliability of the elastic conductive member 23 ; Increase the vibration performance of its vibration system 2, effectively improving the acoustic performance of the sound device.

The second fixed arm 232 supports the voice coil 22 to prevent the voice coil 22 from swinging from side to side, and provides the vibration strength and balance of the vibration system 2; at the same time, the voice coil 22 is electrically connected to the pad 2323 to avoid When the lead structure of the voice coil 22 leads to the power source, the lead of the voice coil 22 is likely to be broken.

The second diaphragm 24 is attached to a side of the elastic conductive member 23 away from the first diaphragm 21, and the second diaphragm 24 includes a first connecting portion 241 fixed to the first fixed arm 231 , The second connecting portion 242 attached to the second fixed arm 232 and the folding ring portion 243 connecting the first connecting portion 241 and the second connecting portion 242, the folding ring portion 243 and the elastic The arms 233 are directly opposed to each other and are arranged at intervals; the folding ring portion 243 is an arc-shaped structure that is bent in a direction away from the elastic arm 233, which is beneficial to enhance the vibration effect of the vibration system 2 and improve the sound generating device 100 The acoustic performance.

The number of the second diaphragm 24 is four, and they are arranged opposite to the four elastic arms 233 respectively. The second diaphragm 24 and the elastic conductive member 23 work together to prevent the voice coil 22 from swaying, enhance its stability, and at the same time enhance the vibration effect of the first diaphragm 21, and improve the performance of the sound generating device 100 Acoustic performance.

The magnetic circuit system 2 is fixed to the basin frame 1 for driving the vibration system 3 to vibrate. The magnetic circuit system 2 includes a magnetic yoke 31 fixed to the basin frame, a main magnet 32 fixed to the magnetic yoke 31, and a plurality of mutually spaced auxiliary magnets 33 arranged around the main magnet 32, The secondary magnet 33 and the main magnet 32 are spaced to form a magnetic gap, and the voice coil 22 is inserted into the magnetic gap.

The yoke 31 includes an escape groove 310 formed by a side close to the folding ring portion 243 and a side away from the folding ring portion 243; the escape groove 310 is disposed directly opposite to the folding ring portion 243; The avoiding groove 310 provides space for the folded ring portion 243 having an arc-shaped structure, so as to avoid increasing the volume of the sound emitting device 100. Specifically, the number of the avoiding grooves 310 corresponds to the number of the folding ring portions 243 one-to-one; in this embodiment, the number of the avoiding grooves 310 is four.

The main magnet 32 is provided with a groove 321 recessed inward from its periphery. The groove 321 matches the electrical connection portion 2322 and is used to receive the electrical connection portion 2322. At the same time, the main magnet 32 Relatively only four grooves 321 are reduced, which can ensure that the driving performance of the magnetic circuit system 3 is not affected.

The voice coil 22 has a rectangular structure, and the auxiliary magnet 33 includes two first auxiliary magnets 331 parallel to the long axis of the voice coil 22 and two second auxiliary magnets parallel to the short axis of the voice coil 22 Steel 332, of course, the number and structure of the secondary magnetic steel 33 are not limited to this.

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 sounding device 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; the vibration system includes a first diaphragm fixed to the basin frame, a drive The first diaphragm vibrates the voice coil and the elastic conductive member that supports the voice coil on the basin frame; the magnetic circuit system includes a magnetic yoke fixed to the basin frame, and a magnetic yoke fixed to the magnetic yoke. A main magnet and a plurality of mutually spaced auxiliary magnets arranged around the main magnet, the auxiliary magnet and the main magnet are spaced to form a magnetic gap, and the voice coil is inserted in the magnetic gap; The elastic conductive member includes a first fixed arm fixed to the basin frame, a second fixed arm fixed to an end of the voice coil away from the first diaphragm, and a connection between the first fixed arm and the second fixed arm. The elastic arm of the fixed arm; characterized in that, the second fixed arm includes a support portion that is attached and fixed to the voice coil, and extends from the support portion in a direction away from the basin frame to the voice coil. The electrical connection part within the accommodating range and the pad provided on the electrical connection portion, and the voice coil is electrically connected to the pad.
The sounding device according to claim 1, wherein the vibration system further comprises a second diaphragm attached to a side of the elastic conductive member away from the first diaphragm, and the second diaphragm includes A first connecting portion fixed to the first fixed arm, a second connecting portion attached to the second fixed arm, and a folding ring portion connecting the first connecting portion and the second connecting portion, the The folding ring part is directly opposite to the elastic arm and is arranged at intervals.
The sounding device according to claim 2, wherein the voice coil has a rectangular structure, and the sub-magnet includes two first sub-magnets parallel to the long axis of the voice coil and two first sub-magnets parallel to the voice coil. The two second auxiliary magnets of the short shaft, the elastic conductive member includes four and are respectively located at the four corners of the voice coil.
The sounding device according to claim 3, wherein the first fixed arms of the two elastic conductive members located on the same side of the short axis of the voice coil are connected to each other.
The sounding device according to claim 1, wherein the main magnetic steel is provided with a groove recessed inward from its periphery, and the groove matches the electrical connection part and is used for accommodating the electrical connection unit.
The sound emitting device according to claim 3, wherein the number of the second diaphragms is four, and the second diaphragms are respectively arranged opposite to the four elastic arms.
The sounding device according to claim 2, wherein the folding ring portion is an arc structure bent in a direction away from the elastic arm.
The sounding device according to claim 2, wherein the yoke includes an escape groove formed by a side close to the folding ring portion and a side away from the folding ring portion; Is provided to the folding ring part.