WO2022006932A1

WO2022006932A1 - Sound production apparatus

Info

Publication number: WO2022006932A1
Application number: PCT/CN2020/102057
Authority: WO
Inventors: 肖波; 孔晨亮; 令狐荣林; 章统
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: 2020-07-08
Filing date: 2020-07-15
Publication date: 2022-01-13
Also published as: CN212628398U

Abstract

Embodiments of the present application provide a sound production apparatus. The sound production apparatus comprises a sound production unit; the sound production unit comprises a vibration system and a magnetic circuit system driving the vibration system to vibrate so as to produce sound; and an inner cavity is formed between the vibration system and the magnetic circuit system. The sound production apparatus further comprises a rear cover covering the side of the sound production unit close to the magnetic circuit system, and an air-permeable assembly fixed to the side of the rear cover close to the magnetic circuit system. The air-permeable assembly comprises an annular support fixed to the sound production unit, and an air-permeable isolation net that is provided on the annular support by means of injection molding; a through hole is formed in the air-permeable isolation net in a penetrating mode; at least a part of the magnetic circuit system is exposed out of the air-permeable isolation net by means of the through hole; the magnetic circuit system, the air-permeable isolation net, the annular support, and the rear cover define a rear cavity used for accommodating a sound absorption material; and the rear cavity is communicated with the inner cavity by means of the air-permeable isolation net. The present solution can improve the low-frequency performance of the sound production apparatus during sound production, improves the assembling efficiency, and improves the reliability of the structure.

Description

sound device

technical field

The utility model belongs to the technical field of sound-emitting devices, in particular to a sound-emitting device.

Background technique

In the related art, in order to have the effect of adjusting the low frequency, a shell structure needs to be additionally provided on the device for installing the sound-generating unit to form a back cavity, and a mesh (breathable isolation mesh) should be bonded between the sound-generating unit and the shell structure. ) to fill the sound-absorbing material between the mesh and the shell structure, but the rear cavity structure in this way is difficult to meet the needs of sound production, and the mesh using the bonding method reduces the assembly efficiency, the mesh is easy to fall off or deform during collision, and the reliability not tall.

technical problem

The purpose of the utility model is to provide a sounding device, which can improve the low frequency performance of the sounding device when it is sounding, improve the assembly efficiency, and improve the reliability of the structure.

technical solutions

The technical scheme of the present utility model is as follows: a sound-generating device, comprising a sound-generating unit, the sound-generating unit includes a vibration system and a magnetic circuit system that drives the vibration system to vibrate and sound, the vibration system and the magnetic circuit system An inner cavity is formed between the sound-generating devices, and the sound-generating device further includes a back cover arranged on the side of the sound-generating unit close to the magnetic circuit system, and a ventilation component fixed on the side of the back cover near the magnetic circuit system; The ventilation assembly includes: an annular support fixed with the sounding unit and a ventilation isolation net injected into the annular support, the ventilation isolation mesh is provided with a through hole, and at least part of the magnetic circuit system passes through the through hole Exposed on the breathable isolation net, the magnetic circuit system, the breathable isolation net, the annular bracket and the back cover form a rear cavity for accommodating sound-absorbing materials, and the rear cavity is isolated by the ventilation A mesh communicates with the lumen.

Further, the breathable isolation net includes an outer edge fixed with the annular bracket by injection molding, an inner edge fixed with the magnetic circuit system, and an inner edge connected between the inner edge and the outer edge and connected with the sounding unit. The connecting portion is spaced apart from the body, the connecting portion is facing the vibration system, and at least part of the connecting portion is concave toward the vibration system or protrudes in the direction away from the vibration system.

Further, the magnetic circuit system includes a magnet portion and a magnetic conducting plate supporting and fixing the magnet portion, and the magnetic circuit system is provided with a magnetic conducting plate and the magnet portion in sequence and communicating with the inner cavity. A through hole, the sounding unit further includes a ventilating partition net fixed on the magnetic circuit system and correspondingly covering the through hole, and the rear cavity is communicated with the inner cavity through the ventilating partition net.

Further, the inner edge is fixed with the edge of the magnetic conductive plate, and the side of the magnetic conductive plate away from the magnet portion is correspondingly recessed to form an avoidance step to avoid the inner edge, and the inner edge is arranged around the The outer periphery of the magnetic conducting plate is overlapped with the avoidance step.

Further, the annular support includes a support body sandwiched between the sound-generating unit and the back cover and fixedly connected with the sound-generating unit, and a support body facing from an end of the support body near the back cover. an annular connecting edge extending in a direction away from the main body of the bracket, the back cover includes a cover plate opposite to the sound-generating unit, and extending from the edge of the cover plate toward the sound-generating unit, surrounding and abutting A peripheral wall at the outer periphery of the annular connecting edge.

Further, one side of the metal connecting piece is embedded in the annular connecting edge.

Further, the cover plate is provided with a filling hole communicating with the rear cavity, the sound-absorbing material is filled into the rear cavity through the filling hole, and the sound-emitting device further comprises a cover arranged on the rear cover. And cover the sealing cap of the filling hole.

Further, the cover plate is provided with a leakage hole that communicates with the back cavity and is spaced apart from the filling hole, the diameter of the leakage hole is smaller than the diameter of the filling hole, and the sounding device further includes a cover. A breathable membrane arranged on the back cover and covering the leakage hole.

Further, the rear cover is a metal cover, and one end of the peripheral wall close to the bracket body extends outward to form a connecting foot. A metal connecting piece, the connecting pin and the metal connecting piece are welded and fixed.

Further, part of the metal connecting piece is embedded in the annular connecting edge.

Further, the sound-generating unit further includes a basin frame for fixing the magnetic circuit system and the vibration system, the magnet part is sandwiched between the magnetic conducting plate and the basin frame, and the basin frame is clamped It is provided between the magnet part and the vibration system.

beneficial effect

The beneficial effects of the utility model are as follows: the magnetic circuit system, the air-permeable isolation net, the annular support and the back cover form a back cavity, the back cavity is filled with sound-absorbing material, and the breathable isolation net can block the flow of the sound-absorbing material to the sound-emitting unit, ensuring the vibration space. Under the premise, the volume of the sound-absorbing material filled in the rear cavity can be maximized, and the low-frequency performance of the speaker can be improved. The ventilation isolation net does not need to be glued and bonded. The assembly method is simple, which improves the assembly efficiency, and the ring bracket can isolate the ventilation in the event of a collision. The net is used for protection, reducing the risk of falling off or deforming the breathable isolation net, and the structure is more reliable.

Description of drawings

Fig. 1 is the overall structure schematic diagram of the sound-emitting device of the present invention;

Fig. 2 is the sectional view of the sound-emitting device of the present invention in the direction of A-A in Fig. 1;

3 is a sectional view of the sound-emitting device of the present invention in the direction B-B in FIG. 1;

4 is a schematic diagram of a three-dimensional exploded structure of the sound-emitting device of the present invention;

5 is a schematic diagram of a three-dimensional exploded structure of a ventilation component in the sound-emitting device of the present invention.

Embodiments of the present invention

The present utility model will be further described below with reference to the accompanying drawings and embodiments.

As shown in Figures 1-5, a sound-generating device is provided, including a sound-generating unit 1, the sound-generating unit 1 includes a vibration system 13 and a magnetic circuit system 12 that drives the vibration system 13 to vibrate and sound, and the vibration system 13 and the magnetic circuit system 12 are connected. An inner cavity 102 is formed therebetween, and the sound-generating device further includes a back cover 22 which is covered on the side of the sound-generating unit 1 close to the magnetic circuit system 12, and a ventilating component 2 fixed on the side of the back cover 22 near the magnetic circuit system 12; the ventilating component 2 includes : the annular support 21 fixed with the sounding unit 1 and the breathable isolation net 23 injected into the annular support 21, the breathable isolation net 23 is provided with through holes 234, and at least part of the magnetic circuit system 12 is exposed to the breathable isolation net through the through holes 234 23. The magnetic circuit system 12 , the ventilating isolation net 23 , the annular support 21 and the back cover 22 form a back cavity 101 for accommodating the sound-absorbing material.

The magnetic circuit system 12, the air-permeable isolation net 23, the annular support 21 and the back cover 22 form a rear cavity 101, and the rear cavity 101 is filled with sound-absorbing material. Under the premise, the volume of the sound-absorbing material filled in the rear cavity 101 can be maximized, and the low-frequency performance of the speaker can be improved. The breathable isolation net 23 is protected, the risk of falling off or deformation of the breathable isolation net 23 is reduced, and the structure is more reliable.

The air-permeable isolation net 23 includes an outer edge 232 fixed with the annular bracket 21 by injection molding, an inner edge 231 fixed with the magnetic circuit system 12 , and a connecting portion 233 connected between the inner edge 231 and the outer edge 232 and spaced from the sounding unit 1 . , the connecting portion 233 is directly opposite to the vibration system 13 and at least part of the connecting portion 233 is concave in the direction close to the vibration system 13 or protrudes in the direction away from the vibration system 13 . The structure of the connecting portion 233 can further increase the filling volume of the sound-absorbing material, the air-permeable isolation net 23 does not need to be glued and bonded, the assembly method is simple, and the assembly efficiency is improved.

The magnetic circuit system 12 includes a magnet portion 121 and a magnetic conducting plate 122 supporting and fixing the magnet portion 121 . The magnetic circuit system 12 is provided with a conducting hole 123 which penetrates the magnetic conducting plate 122 and the magnet portion 121 in sequence and communicates with the inner cavity 102 . The body 1 further includes a ventilating partition net 124 fixed to the magnetic circuit system 12 and correspondingly covering the conducting hole 123 , and the rear cavity 101 communicates with the inner cavity 102 through the ventilating partition net 124 .

The sound generating unit 1 further includes a basin frame 11 for fixing the magnetic circuit system 12 and the vibration system 13 . The magnet part 121 is sandwiched between the magnetic conducting plate 122 and the basin frame 11 , and the basin frame 11 is sandwiched between the magnet part 121 and the vibration system 13 . between.

The magnet portion 121 has a magnetic gap 121 communicating with the inner cavity 102 . The through hole 123 penetrates through the magnet portion 121 and communicates with the magnetic gap 121 . The vibration system 13 includes a sound membrane 131 fixed on the side of the basin frame 11 away from the back cover 22 , a voice coil 132 arranged on the side of the sound membrane 131 close to the magnetic circuit system, an auxiliary vibration membrane 133 opposite to the sound membrane 131 and arranged at intervals, and a bracket 134 connected between the sound membrane 131 and the auxiliary diaphragm 133 , the voice coil 132 is suspended in the magnetic gap 121 , and the bracket 134 includes a The main body part 1341 and the extension part 1342 extending from the main body part 1341 in the direction of the magnetic circuit system. The extension portion 1342 includes a first extension arm 13421 sandwiched between the voice coil 132 and the main body portion 1341, and a second extension arm 13422 sandwiched between the main body portion 1341 and the auxiliary diaphragm 133, preferably , the first extension arm 13421 and the second extension arm 13422 are spaced apart.

The inner edge 231 of the air-permeable isolation net 23 is fixed to the edge of the magnetic conductive plate 122 , and the side of the magnetic conductive plate 122 away from the magnet portion 121 is correspondingly recessed to form an avoidance step 1221 that avoids the inner edge 231 , and the inner edge 231 is arranged around the outer periphery of the magnetic conductive plate 122 and overlap with the avoidance step 1221 . This makes the installation of the ventilation isolation net 23 more precise and convenient, and the connection with the magnetic conductive plate 122 is more stable and reliable.

The annular bracket 21 includes a bracket body 211 sandwiched between the sound-generating unit 1 and the back cover 22 and fixedly connected to the sound-generating unit 1 , and a bracket body 211 extending from an end of the bracket body 211 close to the back cover 22 in a direction away from the bracket body 211 . The back cover 22 includes a cover plate 221 opposite to the sound-generating unit 1 and a peripheral wall 222 extending from the edge of the cover plate 221 toward the sound-generating unit 1 and surrounding and abutting on the outer periphery of the ring-shaped connecting edge 212 .

The cover plate 221 is provided with a filling hole 2211 communicating with the back cavity 101 , and the sound-absorbing material is filled into the back cavity 101 through the filling hole 2211 .

The cover plate 221 is provided with a leakage hole 2212 which communicates with the rear cavity 101 and is spaced from the filling hole 2211. The diameter of the leakage hole 2212 is smaller than the diameter of the filling hole 2211. The sounding device also includes a cover arranged on the rear cover 22 and covering the leakage hole. 2212 breathable membrane 25.

The back cover 22 is a metal cover, and one end of the peripheral wall 222 close to the bracket body 211 extends outward to form a connecting pin 2221. The sound-emitting device also includes a metal connecting piece 26 integrally injected into the bracket body 211 and corresponding to the connecting pin 2221. The metal connecting piece 26 is welded and fixed. One side of the metal connecting piece 26 is embedded in the annular connecting edge 212 .

The above are only the embodiments of the present utility model. It should be pointed out that for those of ordinary skill in the art, improvements can be made without departing from the inventive concept of the present utility model, but these belong to The scope of protection of the utility model.

Claims

A sound-generating device includes a sound-generating unit, the sound-generating unit includes a vibration system and a magnetic circuit system that drives the vibration system to vibrate and sound, an inner cavity is formed between the vibration system and the magnetic circuit system, and it is characterized in that , the sound-generating device further comprises a back cover arranged on the side of the sound-generating unit close to the magnetic circuit system and a ventilation component fixed on the side of the back cover close to the magnetic circuit system; the ventilation component includes : a ring-shaped bracket fixed with the sounding unit and a ventilating isolation net injected into the ring-shaped support, the ventilating and isolating net is provided with a through hole, and at least part of the magnetic circuit system is exposed to the outside through the through hole The breathable isolation net, the magnetic circuit system, the breathable isolation net, the annular support and the back cover form a back cavity for accommodating sound-absorbing materials, and the rear cavity is connected to the Inner cavity communication.
The sound-generating device according to claim 1, wherein the air-permeable isolation net comprises an outer edge fixed to the annular bracket by injection molding, an inner edge fixed to the magnetic circuit system, and a connection between the inner edge and the outer edge. a connecting part between the outer edges and spaced apart from the sounding unit, the connecting part is facing the vibration system and at least part of the connecting part is recessed toward the vibration system or away from the vibration system The direction of the vibration system is convex.
The sound-generating device according to claim 1 or 2, wherein the magnetic circuit system comprises a magnet part and a magnetic conducting plate supporting and fixing the magnet part, and the magnetic circuit system is provided with penetrating through the magnetic conducting plate in sequence. and the magnet part and the conducting hole communicated with the inner cavity, the sounding unit also includes a ventilating mesh fixed on the magnetic circuit system and correspondingly covering the conducting hole, the rear cavity passes through the The breathable partition mesh is communicated with the inner cavity.
The sound-generating device according to claim 3, wherein the inner edge is fixed to the edge of the magnetic conductive plate, and a side of the magnetic conductive plate away from the magnet portion is correspondingly recessed to avoid the inner edge a step, the inner edge is arranged around the outer periphery of the magnetic conductive plate and overlaps the avoidance step.
The sound-generating device according to claim 3, wherein the annular bracket comprises a bracket body sandwiched between the sound-generating unit and the back cover and fixedly connected with the sound-generating unit; An annular connecting edge formed by an end of the bracket body close to the rear cover extending in a direction away from the bracket body, the rear cover includes a cover plate opposite to the sounding unit and a cover plate facing away from the edge of the cover plate. The sound-generating unit extends around and abuts on the peripheral wall of the outer periphery of the annular connecting edge.
The sound-generating device according to claim 5, wherein the cover plate is provided with a filling hole communicating with the back cavity, the sound-absorbing material is filled into the back cavity through the filling hole, and the The sounding device further includes a sealing cover which is covered on the rear cover and covers the filling hole.
The sound-generating device according to claim 6, wherein the cover plate is provided with a leakage hole communicating with the back cavity and spaced from the filling hole, and the diameter of the leakage hole is smaller than that of the filling hole. According to the diameter of the hole, the sound-emitting device further includes a gas permeable membrane covered on the back cover and covering the leakage hole.
The sound-generating device according to claim 5, wherein the back cover is a metal cover, and one end of the peripheral wall close to the bracket body extends outward to form a connecting foot, and the sound-generating device further comprises an integrally injection-molded part of the support body. The bracket main body and the metal connecting piece corresponding to the connecting pin, the connecting pin and the metal connecting piece are welded and fixed.
The sounding device according to claim 8, wherein a part of the metal connecting piece is embedded in the annular connecting edge.
The sound-generating device according to claim 9, wherein the sound-generating unit further comprises a basin frame for fixing the magnetic circuit system and the vibration system, and the magnet part is sandwiched between the magnetic conducting plate and the vibration system. Between the basin frames, the basin frame is sandwiched between the magnet part and the vibration system.