CN212628398U

CN212628398U - Sound producing device

Info

Publication number: CN212628398U
Application number: CN202021331795.1U
Authority: CN
Inventors: 肖波; 孔晨亮; 令狐荣林; 章统
Original assignee: AAC Technologies Pte Ltd
Current assignee: AAC Technologies Pte Ltd
Priority date: 2020-07-08
Filing date: 2020-07-08
Publication date: 2021-02-26
Anticipated expiration: 2030-07-08
Also published as: WO2022006932A1

Abstract

The utility model provides a sound production device. The sound production device comprises a sound production unit, a back cover and a ventilation assembly, wherein the sound production unit comprises a vibration system and a magnetic circuit system for driving the vibration system to vibrate and produce sound, an inner cavity is formed between the vibration system and the magnetic circuit system, the back cover is covered on one side, close to the magnetic circuit system, of the sound production unit, and the ventilation assembly is fixed on one side, close to the magnetic circuit system, of the back cover; the ventilation assembly comprises: the sound-absorbing material is arranged in the inner cavity of the sound-absorbing material, and the sound-absorbing material is arranged in the inner cavity of the sound-absorbing material. This scheme can promote the low frequency performance when sound generating mechanism is sounded, promotes assembly efficiency to improve the reliability of structure.

Description

Sound producing device

[ technical field ] A method for producing a semiconductor device

The utility model belongs to the technical field of the sounding device, especially, relate to a sound generating mechanism.

[ background of the invention ]

In the correlation technique, in order to play the effect of adjusting the low frequency, need set up shell structure in addition in order to form the back chamber on the free equipment of installation sound production, and will bond mesh (ventilative separation net) between sound production monomer and shell structure in order to fill sound absorbing material between mesh and shell structure, but the back chamber structure that adopts this kind of mode is difficult to satisfy the sound production demand, and the mesh that adopts the bonding mode has reduced assembly efficiency, and the mesh drops or warp easily during the collision, and the reliability is not high.

[ Utility model ] content

An object of the utility model is to provide a sound generating mechanism can promote the low frequency performance when sound generating mechanism is sounded, promotes assembly efficiency to improve the reliability of structure.

The technical scheme of the utility model as follows: a sound production device comprises a sound production unit, wherein the sound production unit comprises a vibration system and a magnetic circuit system for driving the vibration system to vibrate and produce sound, an inner cavity is formed between the vibration system and the magnetic circuit system, the sound production device also comprises a rear cover and a ventilation assembly, the rear cover is covered on one side, close to the magnetic circuit system, of the sound production unit, and the ventilation assembly is fixed on one side, close to the magnetic circuit system, of the rear cover; the air-permeable assembly includes: the sound-absorbing device comprises an annular support fixed with the sound-producing units and a breathable isolation net injected to the annular support, wherein the breathable isolation net is provided with a through hole in a penetrating mode, at least part of the magnetic circuit system is exposed to the breathable isolation net through the through hole, the magnetic circuit system, the breathable isolation net, the annular support and the rear cover are enclosed to form a rear cavity used for containing sound-absorbing materials, and the rear cavity is communicated with the inner cavity through the breathable isolation net.

Further, the breathable isolation net comprises an outer edge fixed with the annular support in an injection molding mode, an inner edge fixed with the magnetic circuit system and a connecting portion connected between the inner edge and the outer edge and arranged at intervals with the sound production units, wherein the connecting portion is opposite to the vibration system, and at least part of the connecting portion is sunken towards the direction close to the vibration system or is protruded towards the direction far away from the vibration system.

Furthermore, the magnetic circuit system comprises a magnet part and a magnetic conducting plate for supporting and fixing the magnet part, the magnetic circuit system is provided with a via hole which sequentially penetrates through the magnetic conducting plate and the magnet part and is communicated with the inner cavity, the sounding unit further comprises a ventilating separation net which is fixed on the magnetic circuit system and correspondingly covers the via hole, and the rear cavity is communicated with the inner cavity through the ventilating separation net.

Further, the inner edge is fixed with the edge of the magnetic conduction plate, one side, far away from the magnet part, of the magnetic conduction plate corresponds to the concave part to form an avoidance step for avoiding the inner edge, and the inner edge is wound on the periphery of the magnetic conduction plate and is lapped on the avoidance step.

Further, the ring carrier is including pressing from both sides and locating sound production monomer with between the back lid and with sound production monomer fixed connection's support main part and certainly the support main part be close to the one end of back lid is towards keeping away from the annular edge of connecting that the direction of support main part extended formation, the back lid include with sound production monomer relative apron and certainly the edge of apron towards sound production monomer extends and around establishing and butt and be in the perisporium of annular edge of connecting's periphery.

Further, one side of the metal connecting sheet is embedded into the annular connecting edge.

Further, the apron seted up with the filling hole of back chamber intercommunication, sound absorbing material warp the filling hole is filled extremely the back chamber, sound generating mechanism is still located including the lid back lid covers the sealed lid in filling hole.

Further, the apron seted up with back chamber intercommunication and with the leakage hole that the filling hole interval set up, the diameter in leakage hole is less than the diameter in filling hole, sound generating mechanism is still including covering and locating the back lid and cover the ventilated membrane in leakage hole.

Further, the rear cover is a metal cover, the peripheral wall is close to one end side of the support main body and extends outwards to form a connecting pin, the sound generating device further comprises a metal connecting piece which is integrally molded with the support main body and corresponds to the connecting pin, and the connecting pin is welded and fixed with the metal connecting piece.

Further, a portion of the metal connecting piece is embedded in the annular connecting rim.

Further, the sounding unit further comprises a basin frame for fixing the magnetic circuit system and the vibration system, the magnet portion is clamped between the magnetic conductive plate and the basin frame, and the basin frame is clamped between the magnet portion and the vibration system.

The beneficial effects of the utility model reside in that: magnetic circuit, ventilative spacer screen, toroidal support and back lid enclose and form the back chamber, pack sound absorbing material in the back chamber, ventilative spacer screen can block sound absorbing material flow direction sound production monomer, can maximize the volume that sound absorbing material was filled to the back chamber under the prerequisite of guaranteeing vibration space, low frequency performance when promoting the speaker sound production, ventilative spacer screen need not to beat to glue and bond, the assembly method is simple, the assembly efficiency has been promoted, and toroidal support can protect ventilative spacer screen when receiving the collision, reduce the risk that ventilative spacer screen drops or warp, the structure is more reliable.

[ description of the drawings ]

Fig. 1 is a schematic view of the overall structure of the sound generating device of the present invention;

fig. 2 is a sectional view of the sound generating device of the present invention in the direction of a-a in fig. 1;

fig. 3 is a cut-away view of the sound generating device of the present invention in the direction B-B in fig. 1;

fig. 4 is a schematic view of a three-dimensional exploded structure of the sound generating device of the present invention;

fig. 5 is a schematic view of the three-dimensional decomposition structure of the ventilation assembly in the sound generating device of the present invention.

[ detailed description ] embodiments

The present invention will be further described with reference to the accompanying drawings and embodiments.

As shown in fig. 1-5, a sound generating device is provided, which includes a sound generating unit 1, the sound generating unit 1 includes a vibration system 13 and a magnetic circuit system 12 for driving the vibration system 13 to vibrate and generate sound, an inner cavity 102 is formed between the vibration system 13 and the magnetic circuit system 12, the sound generating device further includes a rear cover 22 covering one side of the sound generating unit 1 close to the magnetic circuit system 12, and a ventilation assembly 2 fixed to one side of the rear cover 22 close to the magnetic circuit system 12; the ventilation assembly 2 comprises: the sound-absorbing device comprises an annular support 21 fixed with the sound-generating unit 1 and a breathable isolation net 23 injected to the annular support 21, wherein a through hole 234 is formed in the breathable isolation net 23 in a penetrating manner, at least part of the magnetic circuit system 12 is exposed to the breathable isolation net 23 through the through hole 234, the magnetic circuit system 12, the breathable isolation net 23, the annular support 21 and the rear cover 22 surround to form a rear cavity 101 used for containing sound-absorbing materials, and the rear cavity 101 is communicated with the inner cavity 102 through the breathable isolation net 23.

Magnetic circuit 12, ventilative spacer screen 23, toroidal support 21 and back lid 22 surround and form rear cavity 101, the packing of rear cavity 101 is inhaled the acoustic material, ventilative spacer screen 23 can block acoustic material flow direction sound production monomer 1, can maximize rear cavity 101 and fill the volume of acoustic material under the prerequisite of guaranteeing the vibration space, low frequency performance when promoting the speaker sound production, ventilative spacer screen 23 need not to beat to glue and bond, the assembly means is simple, the assembly efficiency has been promoted, and toroidal support 21 can protect ventilative spacer screen 23 when receiving the collision, reduce the risk that ventilative spacer screen 23 drops or warp, the structure is more reliable.

The air-permeable separation net 23 comprises an outer edge 232 fixed with the annular support 21 in an injection molding mode, 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 arranged at an interval with the sound generating unit 1, wherein the connecting portion 233 is opposite to the vibration system 13, and at least part of the connecting portion 233 is sunken towards the direction close to the vibration system 13 or protrudes towards the direction far away from the vibration system 13. The structure of connecting portion 233 can further improve the filled volume of acoustic material, and ventilative separation net 23 need not to beat to glue and bonds, and the assembly method is simple, has promoted assembly efficiency.

The magnetic circuit system 12 includes a magnet portion 121 and a magnetic conductive plate 122 supporting and fixing the magnet portion 121, the magnetic circuit system 12 is provided with a through hole 123 sequentially penetrating through the magnetic conductive plate 122 and the magnet portion 121 and communicating with the inner cavity 102, the sounding unit 1 further includes a ventilation screen 124 fixed to the magnetic circuit system 12 and correspondingly covering the through hole 123, and the rear cavity 101 is communicated with the inner cavity 102 through the ventilation screen 124.

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

The magnet portion 121 has a magnetic gap 121 communicating with the internal cavity 102. The via hole 123 penetrates the magnet part 121 and communicates with the magnetic gap 121. The vibration system 13 includes a sound membrane 131 fixed on one side of the frame 11 away from the back cover 22, a voice coil 132 disposed on one side of the sound membrane 131 close to the magnetic circuit system, an auxiliary diaphragm 133 disposed opposite to the sound membrane 131 at an interval, and a support 134 connected between the sound membrane 131 and the auxiliary diaphragm 133, wherein the voice coil 132 is suspended in the magnetic gap 121, and the support 134 includes a main body portion 1341 attached to the sound membrane 131 and an extension portion 1342 extending from the main body portion 1341 toward the magnetic circuit system direction. The extension portion 1342 includes a first extension arm 13421 interposed between the voice coil 132 and the main body portion 1341, and a second extension arm 13422 interposed between the main body portion 1341 and the auxiliary diaphragm 133, and preferably, the first extension arm 13421 and the second extension arm 13422 are disposed at an interval.

The inner edge 231 of the air-permeable separation net 23 is fixed to the edge of the magnetic conductive plate 122, one side of the magnetic conductive plate 122, which is far away from the magnet portion 121, is correspondingly recessed to form an avoiding step 1221 for avoiding the inner edge 231, and the inner edge 231 is wound around the periphery of the magnetic conductive plate 122 and is lapped on the avoiding step 1221. The installation of the air-permeable separation net 23 is more accurate and convenient, and the connection with the magnetic conduction plate 122 is more stable and reliable.

The annular bracket 21 includes a bracket main body 211 interposed between the sound generating unit 1 and the rear cover 22 and fixedly connected to the sound generating unit 1, and an annular connecting edge 212 formed by extending from one end of the bracket main body 211 close to the rear cover 22 in a direction away from the bracket main body 211, and the rear cover 22 includes a cover plate 221 facing the sound generating unit 1, and a peripheral wall 222 extending from an edge of the cover plate 221 toward the sound generating unit 1 and wound around and abutting on an outer periphery of the annular connecting edge 212.

The cover plate 221 is provided with a filling hole 2211 communicated with the rear cavity 101, the sound absorbing material is filled into the rear cavity 101 through the filling hole 2211, and the sound generating device further comprises a sealing cover 24 covering the rear cover 22 and covering the filling hole 2211.

The cover plate 221 is provided with a leakage hole 2212 which is communicated with the rear cavity 101 and is arranged at an interval with the filling hole 2211, the diameter of the leakage hole 2212 is smaller than that of the filling hole 2211, and the sounding device further comprises a breathable film 25 which is covered on the rear cover 22 and covers the leakage hole 2212.

The rear cover 22 is a metal cover, one end of the peripheral wall 222 near the bracket main body 211 extends outwards to form a connecting pin 2221, the sound generating device further comprises a metal connecting piece 26 which is integrally injection-molded on the bracket main body 211 and corresponds to the connecting pin 2221, and the connecting pin 2221 and the metal connecting piece 26 are welded and fixed. One side of the metal tab 26 is embedded within the annular flange 212.

The above embodiments of the present invention are only described, and it should be noted that, for those skilled in the art, modifications can be made without departing from the inventive concept, but these all fall into the protection scope of the present invention.

Claims

1. A sound production device comprises a sound production unit, wherein the sound production unit comprises a vibration system and a magnetic circuit system for driving the vibration system to vibrate and produce sound, and an inner cavity is formed between the vibration system and the magnetic circuit system; the air-permeable assembly includes: the sound-absorbing device comprises an annular support fixed with the sound-producing units and a breathable isolation net injected to the annular support, wherein the breathable isolation net is provided with a through hole in a penetrating mode, at least part of the magnetic circuit system is exposed to the breathable isolation net through the through hole, the magnetic circuit system, the breathable isolation net, the annular support and the rear cover are enclosed to form a rear cavity used for containing sound-absorbing materials, and the rear cavity is communicated with the inner cavity through the breathable isolation net.

2. The sound production device according to claim 1, wherein the air-permeable separation net comprises an outer edge fixed to the annular support by injection molding, an inner edge fixed to the magnetic circuit system, and a connecting portion connected between the inner edge and the outer edge and spaced from the sound production unit, the connecting portion is opposite to the vibration system, and at least a part of the connecting portion is recessed toward a direction close to the vibration system or is protruded away from the vibration system.

3. The sounding device according to claim 1 or 2, wherein the magnetic circuit system includes a magnet portion and a magnetic conductive plate supporting and fixing the magnet portion, the magnetic circuit system is provided with a via hole sequentially penetrating through the magnetic conductive plate and the magnet portion and communicating with the inner cavity, the sounding unit further includes a ventilation screen fixed to the magnetic circuit system and correspondingly covering the via hole, and the rear cavity is communicated with the inner cavity through the ventilation screen.

4. The apparatus according to claim 3, wherein the inner edge is fixed to the edge of the magnetic conductive plate, the side of the magnetic conductive plate away from the magnet portion is correspondingly recessed to form an avoiding step for avoiding the inner edge, and the inner edge is wrapped around the outer periphery of the magnetic conductive plate and is lapped on the avoiding step.

5. The sound generating device according to claim 3, wherein the ring-shaped support includes a support main body clamped between the sound generating unit and the rear cover and fixedly connected to the sound generating unit, and a ring-shaped connecting edge formed by extending from one end of the support main body close to the rear cover toward a direction away from the support main body, and the rear cover includes a cover plate opposite to the sound generating unit and a peripheral wall extending from an edge of the cover plate toward the sound generating unit and wound around and abutting against an outer periphery of the ring-shaped connecting edge.

6. The sound generating apparatus as claimed in claim 5, wherein the cover plate has 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 generating apparatus further comprises a sealing cover covering the rear cover and covering the filling hole.

7. The sounding device according to claim 6, wherein the cover plate is provided with a leakage hole communicating with the rear cavity and spaced from the filling hole, and the diameter of the leakage hole is smaller than that of the filling hole, and the sounding device further comprises a breathable film covering the rear cover and covering the leakage hole.

8. The sound generating device according to claim 5, wherein the rear cover is a metal cover, one end of the peripheral wall close to the support body extends outwards to form a connecting pin, the sound generating device further comprises a metal connecting piece integrally injection-molded on the support body and corresponding to the connecting pin, and the connecting pin is welded and fixed with the metal connecting piece.

9. The sound generating apparatus of claim 8 wherein a portion of said metal attachment tab is embedded within said annular attachment rim.

10. The sound generating device according to claim 9, wherein the sound generating unit further comprises a frame for fixing the magnetic circuit system and the vibration system, the magnet portion is sandwiched between the magnetic conductive plate and the frame, and the frame is sandwiched between the magnet portion and the vibration system.