CN213638199U

CN213638199U - Sound production device

Info

Publication number: CN213638199U
Application number: CN202022845695.7U
Authority: CN
Inventors: 金鑫; 张帆; 钟志威
Original assignee: AAC Optoelectronic Changzhou Co Ltd
Current assignee: AAC Microtech Changzhou Co Ltd; AAC Optoelectronic Changzhou Co Ltd
Priority date: 2020-11-30
Filing date: 2020-11-30
Publication date: 2021-07-06
Anticipated expiration: 2030-11-30
Also published as: WO2022110460A1

Abstract

The utility model provides a sounding device, its include the basin frame, accept in the vibration system of basin frame, be fixed in the basin frame has magnetic gap's magnetic circuit and protecgulum, vibration system includes the vibrating diaphragm and inserts magnetic gap is with the drive the voice coil loudspeaker voice coil of vibrating diaphragm vibration sound production, the vibrating diaphragm is fixed in the protecgulum, the basin frame include with the accepting portion that the protecgulum links to each other with certainly the accepting portion is extended fixed magnetic circuit's peripheral portion follows the vibration direction of vibrating diaphragm, the vibrating diaphragm is in orthographic projection on the protecgulum with accepting portion is in orthographic projection on the protecgulum does not overlap, wherein, the basin frame with the protecgulum is made by metal material, the protecgulum has the weld part, the weld part with accepting portion is fixed through laser spot welding. The utility model provides a protecgulum of vocal device is difficult for droing.

Description

Sound production device

[ technical field ] A method for producing a semiconductor device

The utility model relates to an electroacoustic conversion field especially relates to a sounding device.

[ background of the invention ]

In order to adapt to the miniaturization and multi-function development of various acoustic equipment and information communication equipment, the sound production device used in the equipment is required to be correspondingly more miniaturized, so that the matching between the sound production device and other peripheral elements is more compact. Particularly, with the demand for the development of the lightness and thinness of the mobile phone, the quality of the sound-generating device used therein is more and more demanding.

In the related art, the sound production device includes a frame, a vibration system accommodated in the frame, a magnetic circuit system fixed on the frame and having a magnetic gap, and a front cover, wherein the vibration system includes a diaphragm fixed on the frame and a voice coil inserted into the magnetic gap to drive the diaphragm to vibrate and produce sound. However, the basin stand and the front cover are both made of plastic and fixed through plastic burning points, and the front cover is easy to fall off due to the fixing mode.

Therefore, there is a need to provide a new sound generation device to solve the above problems.

[ Utility model ] content

An object of the utility model is to provide a sounder, this sounder's protecgulum is difficult for droing.

The utility model provides a sounder, its include the basin frame, accept in the vibration system of basin frame, be fixed in the basin frame has magnetic gap's magnetic circuit and protecgulum, vibration system includes the vibrating diaphragm and inserts the magnetic gap is with the drive the voice coil loudspeaker voice coil of vibrating diaphragm vibration sound production, the vibrating diaphragm is fixed in the protecgulum, the basin frame include with the accepting portion that the protecgulum links to each other with certainly the accepting portion is extended fixed magnetic circuit's peripheral portion follows the vibration direction of vibrating diaphragm, the vibrating diaphragm is in orthographic projection on the protecgulum with the accepting portion is in orthographic projection on the protecgulum does not overlap, wherein, the basin frame with the protecgulum is made by metal material, the protecgulum has the weld part, the weld part with the accepting portion is fixed through laser spot welding.

Preferably, the welding portion is provided in plurality, and the plurality of welding portions are provided at intervals.

Preferably, the plurality of welding parts are respectively located at the chamfered corners of the front cover.

Preferably, the diaphragm has an edge portion fixed to the front cover, the edge portion includes a plurality of first edge portions arranged at intervals and a second edge portion arranged between two adjacent first edge portions, and a distance from the second edge portion to the receiving portion is greater than a distance from the first edge portion to the receiving portion.

Preferably, the sounding device further includes an elastic supporting element disposed at an interval with the diaphragm, a skeleton is fixedly disposed on one side of the diaphragm facing the magnetic circuit system, the skeleton includes a main body portion fixed to the diaphragm and a first extending portion and a second extending portion respectively extending from the main body portion in a direction away from the diaphragm, the first extending portion and the second extending portion are disposed at an interval, wherein one end of the elastic supporting element is fixed to the peripheral portion, and the other end of the elastic supporting element is fixed to the first extending portion; the voice coil is fixed to the second extension portion.

Preferably, a plurality of gaps are arranged on the second extension portion, and the second extension portion is divided into a plurality of isolated islands by the plurality of gaps.

Preferably, the elastic support member includes a flexible circuit board and an auxiliary diaphragm, the flexible circuit board includes a fixing portion fixed to the peripheral portion, a fixing portion fixed to the first extending portion, and an elastic arm connected to the fixing portion and the fixing portion, the auxiliary diaphragm includes a first portion fixedly disposed at one side of the fixing portion away from the peripheral portion, a second portion fixed to one side of the fixing portion away from the first extending portion, and a folding ring connected to the first portion and the second portion, and the folding ring is protruded in a direction away from the flexible circuit board.

Preferably, the magnetic circuit system includes a magnetic bowl fixed on the peripheral portion and a magnet portion accommodated in the magnetic bowl, the magnetic bowl includes a bottom wall and a side wall formed by bending and extending from the periphery of the bottom wall to the direction of the diaphragm, and the magnet portion is fixedly arranged on the bottom wall and forms the magnetic gap with the side wall at an interval.

Preferably, the side wall includes two first side walls that are located respectively the relative both sides of diapire and two second side walls that are located respectively the other relative both sides of diapire, one side that first side wall kept away from the voice coil loudspeaker voice coil is equipped with elastic support spare, the second side wall to keeping away from the direction of voice coil loudspeaker voice coil is buckled and is extended and be formed with the extension, the extension is fixed in the peripheral portion.

Compared with the prior art, the utility model provides a basin frame and protecgulum of vocal device are made by metal material, follow the vibration direction of vibrating diaphragm, the vibrating diaphragm is in orthographic projection on the protecgulum with the accepting of basin frame is in orthographic projection on the protecgulum does not overlap, the vibrating diaphragm is only fixed in the protecgulum to it is fixed through laser spot welding that the weld part of protecgulum and the accepting of basin frame are passed through, and its joint strength is superior to the working of plastics and scalds the point, thereby can make the protecgulum be difficult for droing.

[ description of the drawings ]

Fig. 1 is an exploded view of a sound producing device provided by the present invention;

FIG. 2 is a schematic view of the sound device of FIG. 1 after the diaphragm body and the frame are assembled;

FIG. 3 is a schematic structural view of the skeleton of the sound device shown in FIG. 1;

FIG. 4 is a schematic structural view of a magnetic bowl of the sound generating device shown in FIG. 1;

FIG. 5 is an assembled perspective view of the sound device of FIG. 1;

FIG. 6 is a cross-sectional view of the sound device of FIG. 5 taken along line A-A;

FIG. 7 is a cross-sectional view of the sound device of FIG. 5 taken along line B-B;

FIG. 8 is a cross-sectional view of the sound device of FIG. 5 taken along line C-C.

[ detailed description ] embodiments

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1 to 8, the sound production device comprises a frame 1, a vibration system 3 contained in the frame 1, a magnetic circuit system 5 fixed on the frame 1 and having a magnetic gap 5A, and a front cover 6 fixed on the frame 1, wherein the magnetic circuit system 5 is used for driving the vibration system 3 to vibrate and produce sound.

The frame 1 includes a receiving portion 11 connected to the front cover 6 and a peripheral portion 12 extending from the receiving portion 11 and fixing the magnetic circuit system 5.

The basin stand 1 and the front cover 6 are both made of metal materials. The front cover 6 has a welded portion 61, and the welded portion 61 and the receiving portion 11 are fixed by laser spot welding.

In the present embodiment, the welding portion 61 is provided in plural, and the welding portions 61 are provided at intervals. As shown in fig. 5, the four welding portions 61 are respectively located at the chamfers of the front cover 6. It is understood that, in the embodiment, the number and the position of the welding portions 61 are not limited thereto, and it is only necessary to ensure that the welding portions 61 can be welded and fixed with the receiving portion 11 of the frame 1, and after the welding and fixing, the welding portions 61 have sufficient connection strength therebetween, for example, the welding portions 61 can also be located on the major axis side or/and the minor axis side of the front cover 6.

The vibration system 3 includes a diaphragm 31 and a voice coil 33 inserted into the magnetic gap 5A to drive the diaphragm 31 to vibrate and generate sound. The voice coil 33 is electrically connected to an external circuit, and after the voice coil 33 is powered on, the voice coil 33 vibrates under the action of the magnetic field of the magnetic circuit system 5, and meanwhile, the voice coil 33 drives the diaphragm 31 to vibrate and generate sound.

The vibrating diaphragm 31 is fixed on the front cover 6 and forms an acoustic cavity 10 with the front cover 6 in a surrounding manner, and the front cover 6 is provided with a sound outlet 6A communicated with the acoustic cavity 10. Wherein, the sound generated by the vibration of the diaphragm 31 is transmitted through the sound cavity 10 and the sound outlet 6A.

Follow vibrating diaphragm 31's vibration direction, vibrating diaphragm 31 is in orthographic projection on the protecgulum 6 with receiving portion 11 is in orthographic projection on the protecgulum 6 does not overlap, so that welding portion 61 with basin frame 1 receiving portion 11 passes through laser spot welding when fixed, vibrating diaphragm 31 plays the effect of stepping down. Specifically, the diaphragm 31 has an edge portion 31A fixed to the front cover 6, and the edge portion 31A is spaced apart from both the welding portion 61 and the receiving portion 11.

The edge portion 31A includes a plurality of first edge portions 31C arranged at intervals and a second edge portion 31D arranged between two adjacent first edge portions 31C, the distance from the second edge portion 31D to the receiving portion 11 is D1, the distance from the first edge portion 31C to the receiving portion 11 is D2, and D1 > D2. As shown in fig. 2, four first edge portions 31C and four second edge portions 31D are provided, and the second edge portions 31D are located at corners, which is more favorable for laser spot welding and fixing the receiving portions 11 and the welding portions 61 of the front cover 6 at the corners.

In this embodiment, the sound generating device further includes an elastic supporting member 7 spaced apart from the diaphragm 31, a bobbin 34 is fixedly disposed on one side of the diaphragm 31 facing the magnetic circuit system 5, one end of the elastic supporting member 7 is fixed to the peripheral portion 12, the other end of the elastic supporting member is fixed to the bobbin 34, and the voice coil 33 is fixed to the bobbin 34. When the voice coil 33 vibrates, the framework 34 drives the diaphragm 31 and the elastic support 7 to vibrate together.

The skeleton 34 includes a main body portion 341 fixed to the diaphragm 31, and a first extending portion 343 and a second extending portion 345 respectively extending from the main body portion 341 in a direction away from the diaphragm 31, where the first extending portion 343 and the second extending portion 345 are disposed at an interval. Wherein, one end of the elastic supporting member 7 away from the frame 1 is fixed on the first extending part 343; the voice coil 33 is fixed to the second extension 345.

As shown in fig. 3, the main body portion 341 is a ring structure, the first extending portion 343 is formed by extending from an outer circumferential edge of the main body portion 341, and the second extending portion 345 is formed by extending from an inner circumferential edge of the main body portion 341. The main body portion 341 with a ring structure is beneficial to reduce the overall weight of the skeleton 34 to reduce the vibration mass of the sound generating device, thereby being beneficial to improve the sensitivity of the sound generating device.

In this embodiment, a plurality of slits 347 are formed in the second extension portion 345, and the plurality of slits 347 divide the second extension portion 345 into a plurality of isolated islands 345A. That is, the voice coil 33 is fixed to the plurality of isolation islands 345A of the second extension part 345. After the voice coil 33 is fixed to the second extension part 345 by arranging the plurality of gaps 347, an air flow channel is formed between the voice coil 33 and the second extension part 345, and the air flow channel can balance air pressure in the sounding device when the sounding device vibrates, so that the acoustic performance of the sounding device is improved.

The diaphragm 31 includes a film body 35 fixed to the front cover 6 and having a cut-out hole 351, and a dome 37 fixed to an inner peripheral edge of the film body and covering the cut-out hole 351. Wherein the outer periphery of the membrane body 35 is fixed to the front cover 6, that is, the edge portion 31A is at least a part of the outer periphery of the membrane body 35.

The elastic support member 7 includes a flexible circuit board 71 and an auxiliary diaphragm 73.

The flexible circuit board 71 includes a holding portion 711 fixed to the frame 1, a fixing portion 713 fixed to the first extending portion 343, and an elastic arm 715 connecting the holding portion 711 and the fixing portion 713.

In this embodiment, one of the flexible circuit boards 71 further includes a pad portion 717 extending from the fixing portion 713 in a bending direction of the diaphragm, and the pad portion 717 is provided with a lead electrically connected to the voice coil 33. On one hand, the flexible circuit board 71 plays a role of supporting and fixing the vibration system 3, and on the other hand, the holding portion 711 and the pad portion 717 of the flexible circuit board 71 are both provided with a pad (not shown), and the elastic arm 715 and the fixing portion 713 are provided with a conductive path for electrically connecting the holding portion 711 and the pad portion 717, wherein the pad on the pad portion 717 and the lead wire connection of the voice coil 33 play a role of electrically connecting the voice coil 33, the pad on the holding portion 711 is connected with an external circuit, so that the voice coil 33 is electrically connected with the external circuit through the flexible circuit board 71, and when the sound generating device works, an electrical signal of the external circuit is transmitted to the voice coil 33 through the flexible circuit board 71.

It is understood that, in other embodiments, the flexible circuit board 71 may not include a pad portion, and accordingly, a pad electrically connected to the lead of the voice coil 33 is provided on the fixing portion.

The auxiliary diaphragm 73 includes a first portion 731 fixed to the side of the holding portion 711 away from the frame 1, a second portion 733 fixed to the side of the fixing portion 713 away from the first extending portion 343, and a folded ring 735 connecting the first portion 731 and the second portion 733, wherein the folded ring 735 is protruded in a direction away from the flexible circuit board 71. The auxiliary diaphragm 73 is arranged to improve the acoustic performance of the sound production device.

The magnetic circuit system 5 includes a magnetic bowl 51 held in the peripheral portion 12 and a magnet portion 53 housed in the magnetic bowl 51.

The magnetic bowl 51 comprises a bottom wall 511 and a side wall 513 formed by bending and extending from the periphery of the bottom wall 511 to the direction of the diaphragm 31, and the magnet part 53 is fixedly arranged on the bottom wall 511 and forms the magnetic gap 5A with the side wall 513 at an interval.

The side wall 513 includes two first side walls 515 respectively located at two opposite sides of the bottom wall 511 and two second side walls 517 respectively located at two opposite sides of the bottom wall 511, one side of the first side wall 515 away from the voice coil 33 is provided with the elastic supporting member 7, the second side wall 517 bends and extends to a direction away from the voice coil 33 to form an extending portion 519, and the extending portion 519 is fixed to the peripheral portion 12.

The magnet portion 53 includes a permanent magnet 531 fixedly disposed on the bottom wall 511, and a pole core 533 fixedly disposed on a side of the permanent magnet 531 away from the bottom wall 511.

Wherein, the permanent magnet can be a natural magnet or an artificial magnet (for example, magnetic steel); the pole core 533 is made of a magnetically conductive material, so that the magnetic flux in the magnetic gap 5A can be enhanced.

It is understood that, in other embodiments, the magnet portion 53 may be only a permanent magnet, or may be formed by stacking a plurality of permanent magnets and a plurality of pole cores.

The utility model provides a sounding device is through inciting somebody to action weld part 61 welded fastening is in basin frame 1 to can reduce the risk that protecgulum or/and appearance break away from.

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. The utility model provides a sounding device, its include the basin frame, accept in the vibration system of basin frame, be fixed in the basin frame has magnetic gap's magnetic circuit and protecgulum, vibration system includes the vibrating diaphragm and inserts the magnetic gap is with the drive the voice coil loudspeaker voice coil of vibrating diaphragm vibration sound production, its characterized in that: the vibrating diaphragm is fixed in the protecgulum, the basin frame include with the accepting part that the protecgulum links to each other with certainly the accepting part is extended fixed magnetic circuit's peripheral portion follows the vibration direction of vibrating diaphragm, the vibrating diaphragm is in orthographic projection on the protecgulum with the accepting part is in orthographic projection on the protecgulum does not overlap, wherein, the basin frame with the protecgulum is made by metal material, the protecgulum has the welding part, the welding part with the accepting part is fixed through laser spot welding.

2. The sound production device of claim 1, wherein: the welding part is equipped with a plurality ofly, and is a plurality of the welding part interval sets up.

3. The sound production device of claim 2, wherein: the welding parts are respectively positioned at the chamfer angles of the front cover.

4. The sound production device of claim 2 or 3, wherein: the diaphragm is provided with an edge part fixed on the front cover, the edge part comprises a plurality of first edge parts arranged at intervals and a second edge part arranged between two adjacent first edge parts, and the distance from the second edge part to the bearing part is greater than the distance from the first edge part to the bearing part.

5. The sound production device of claim 1, wherein: the sounding device further comprises an elastic supporting piece arranged at an interval with the vibrating diaphragm, a framework is fixedly arranged on one side of the vibrating diaphragm facing the magnetic circuit system, the framework comprises a main body part fixed on the vibrating diaphragm, and a first extending part and a second extending part which are respectively formed by extending from the main body part to the direction away from the vibrating diaphragm, the first extending part and the second extending part are arranged at an interval, wherein one end of the elastic supporting piece is fixed on the peripheral part, and the other end of the elastic supporting piece is fixed on the first extending part; the voice coil is fixed to the second extension portion.

6. The sound production device of claim 5, wherein: the second extension part is provided with a plurality of gaps, and the second extension part is divided into a plurality of isolation islands by the gaps.

7. The sound production device of claim 5, wherein: the elastic support piece comprises a flexible circuit board and an auxiliary vibrating diaphragm, the flexible circuit board comprises a fixing part fixed on the peripheral part, a fixing part fixed on the first extending part and an elastic arm connected with the fixing part, the auxiliary vibrating diaphragm comprises a first part fixedly arranged on the fixing part and far away from one side of the peripheral part, a second part fixed on the fixing part and far away from one side of the first extending part, and a folding ring connected with the first part and the second part, and the folding ring deviates from the direction of the flexible circuit board in a protruding mode.

8. The sound emitting device according to any one of claims 5-7, wherein: the magnetic circuit system comprises a magnetic bowl fixed on the peripheral part and a magnet part contained in the magnetic bowl, the magnetic bowl comprises a bottom wall and a side wall formed by bending and extending from the periphery of the bottom wall to the direction of the vibrating diaphragm, and the magnet part is fixedly arranged on the bottom wall and forms the magnetic gap with the side wall at intervals.

9. The sound production device of claim 8, wherein: the side wall includes that two are located respectively the first side wall of the relative both sides of diapire and two are located respectively the second side wall of the other relative both sides of diapire, one side that first side wall kept away from the voice coil loudspeaker voice coil is equipped with elastic support spare, the second side wall is to keeping away from the direction of voice coil loudspeaker voice coil is buckled and is extended and be formed with the extension portion, the extension portion is fixed in peripheral portion.