CN212628265U

CN212628265U - Speaker device and mobile terminal device

Info

Publication number: CN212628265U
Application number: CN202021331768.4U
Authority: CN
Inventors: 肖波; 令狐荣林
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: WO2022007026A1

Abstract

The utility model provides a loudspeaker device and adopt this loudspeaker device's mobile terminal equipment, loudspeaker device includes shell and speaker monomer, speaker monomer includes solid fixed ring, vibration system and magnetic circuit, vibration system includes the vibrating diaphragm, the vibrating diaphragm includes the intermediate part that is located the central point, from the outer peripheral edge of intermediate part outwards extend the book ring portion that forms, from the outer peripheral edge of book ring portion outwards extending the fixing portion and from the outer peripheral edge of fixing portion bending extension formation extension portion, fixing portion is fixed in the surface that the magnetic circuit was kept away from to the solid fixed ring along the direction of vibration, the shell includes the inner wall that encloses and forms accommodating space, solid fixed ring butt is fixed in the inner wall, the extension portion clamp is located between solid fixed ring and the inner wall, the surface of extension portion towards the inner wall is to the inner wall direction arch formation have the first bulge loop that encircles the solid fixed ring setting, the inner wall is to the direction recess formation, the first convex ring is accommodated and fixed in the first sealing groove.

Description

Speaker device and mobile terminal device

[ technical field ] A method for producing a semiconductor device

The utility model relates to an acoustoelectric field especially relates to a speaker device and adopt this speaker device's mobile terminal equipment.

[ background of the invention ]

With the advent of the mobile internet era, the number of intelligent mobile terminal devices is increasing. Among the mobile terminal devices, the mobile phone is undoubtedly the most common and portable mobile terminal device. At present, the functions of mobile phones are very diverse, one of them is a high-quality music function, and therefore, speaker devices for playing sound are widely used in present mobile terminal devices.

The loudspeaker device in the related art comprises a shell and a loudspeaker single body contained in the shell, wherein the loudspeaker single body comprises a vibration system, a magnetic circuit system for driving the vibration system to vibrate and generate sound and a fixing ring for fixing the magnetic circuit system in the shell, the vibration system comprises a vibration film and a voice coil, the vibration film and the shell enclose to form a containing space, the voice coil drives the vibration film to vibrate, the vibration film comprises a middle part, a folded ring part and a fixing part, the folded ring part and the fixing part sequentially extend outwards from the outer periphery of the middle part, and an extending part is formed by bending and extending the outer periphery of the fixing part, the fixing part is fixed on. However, such a speaker device is not only liable to cause air in the housing space to leak from the gap between the extension portion and the housing, but also liable to cause air outside the mobile terminal device to enter the mobile terminal device from the joint of the holding portion and the housing when such a speaker device is applied to the mobile terminal device.

Therefore, there is a need to provide a new speaker device to solve the above technical problems.

[ Utility model ] content

An object of the utility model is to provide a speaker device and adopt this speaker device's mobile terminal equipment, this speaker device and adopt this speaker device's mobile terminal equipment can guarantee speaker device accommodating space's gas tightness.

In order to achieve the above object, the present invention provides a speaker device, which includes a housing having an accommodating space and a speaker unit accommodated in the housing, wherein the speaker unit includes a fixing ring fixed to the housing, a vibration system fixed to the fixing ring, and a magnetic circuit system; the vibration system comprises a vibrating diaphragm which is used for vibrating and sounding and is fixed on the fixing ring, the vibrating diaphragm comprises a middle part which is positioned at a central position, a ring folding part which is formed by outwards extending the outer periphery of the middle part, a fixing part which is formed by outwards extending the outer periphery of the ring folding part, and an extending part which is formed by bending and extending the outer periphery of the fixing part, the fixing part is fixed on the surface of the fixing ring which is far away from the magnetic circuit system along the vibration direction, the shell comprises an inner wall which forms the containing space, the fixing ring is abutted and fixed on the inner wall, the extending part is clamped between the fixing ring and the inner wall, a first convex ring which is arranged around the fixing ring is convexly formed on the surface of the extending part towards the inner wall towards the direction of the inner wall, and the inner wall is sunken towards the direction, the first convex ring is fixedly accommodated in the first sealing groove.

Preferably, the first convex ring is fixed in the first sealing groove in an extruding manner.

Preferably, the speaker device further includes a casing pressed on the surface of one side of the fixing part far away from the fixing ring, a second convex ring surrounding the folded ring part is convexly formed on the surface of the fixing part far away from the fixing ring in the casing direction, a second sealing groove corresponding to the second convex ring is concavely formed on the surface of the casing facing the fixing part in the direction far away from the fixing part, and the second convex ring is accommodated and fixed in the second sealing groove.

Preferably, the second convex ring is fixed in the second sealing groove in a pressing manner.

Preferably, the magnetic circuit system includes a magnetic yoke fixed to the housing, a main magnetic portion fixed to one side of the magnetic yoke facing the diaphragm, and an auxiliary magnetic portion surrounding the main magnetic portion, the main magnetic portion and the auxiliary magnetic portion are disposed at an interval to form a magnetic gap, and a voice coil is inserted into the magnetic gap.

Preferably, the auxiliary magnetic part includes a plurality of auxiliary magnets fixed to one side of the magnetic yoke facing the diaphragm and disposed around the main magnetic part, and a clamp plate covering one side of the plurality of auxiliary magnets away from the magnetic yoke.

Preferably, the vibration system further comprises a supporting device arranged at an interval with the holding part along the vibration direction, one end of the supporting device is clamped between the fixing ring and the shell, and the other end of the supporting device is connected with the vibrating diaphragm through a framework.

Preferably, the supporting device includes a flexible circuit board and an auxiliary diaphragm, the flexible circuit board includes a first fixing portion fixed to the fixing ring, a second fixing portion fixed to the frame, an elastic connecting portion connecting the first fixing portion and the second fixing portion, and a pad portion formed by extending the second fixing portion, an outer edge of the auxiliary diaphragm is fixed to the first fixing portion, an inner edge of the auxiliary diaphragm is fixed to the second fixing portion, a first pad connected to an external circuit is formed on the first fixing portion, and a second pad electrically connected to the voice coil is formed on the pad portion.

Preferably, the middle portion has a cut-out hole, a reinforcing plate is disposed in the cut-out hole, the bobbin includes a first connecting portion connecting the reinforcing plate and the middle portion, a second connecting portion extending from the first connecting portion to the magnetic circuit system, and a third connecting portion spaced from the second connecting portion, the voice coil is fixed to a side of the second connecting portion away from the first connecting portion, and the supporting device is fixed to a side of the third connecting portion away from the first connecting portion.

Preferably, an isolation assembly is arranged in the housing and spaced from the diaphragm in the vibration direction, the isolation assembly divides the accommodating space into a first cavity and a second cavity, the isolation assembly includes a support ring fixed to the magnetic yoke and a breathable isolation member fixed to the support ring and the magnetic yoke, a breathable channel is formed between the support ring and the magnetic yoke, the first cavity and the second cavity are in airflow communication with the breathable channel through the breathable isolation member, the housing protrudes into the first cavity to form a bump for supporting the support ring, the isolation assembly and the housing enclose to form the first cavity, and the diaphragm, the housing and the isolation assembly enclose to form the second cavity.

Preferably, one side of the magnetic yoke, which is far away from the diaphragm, is fixedly connected with the breathable isolating piece.

Preferably, the magnetic yoke and the main magnetic part are provided with through holes extending along the vibration direction, and the ventilation isolation piece covers the through holes.

Preferably, the casing includes a main body portion, a first bending portion formed by bending and extending from an edge of the main body portion to a direction away from the voice coil, and a second bending portion formed by bending and extending from an end of the first bending portion away from the main body portion, wherein the protrusion is located on the main body portion, the first bending portion is located on a side of the fixing ring departing from the fixing portion, and the extension portion is clamped between the fixing ring and the second bending portion.

The utility model also provides a mobile terminal equipment, including foretell speaker device, speaker device's casing does mobile terminal equipment's casing.

Compared with the prior art, the utility model discloses a speaker device and adopt this speaker device's mobile terminal passes through the extension orientation one side arch of shell is formed with the environment gu the first bulge loop that solid fixed ring set up, and form first seal groove on the inner wall of shell 1, during first bulge loop acceptd and is fixed in first seal groove, first bulge loop is in gu fixed ring with form sealing connection with first seal groove under the effect of shell clamping force to can guarantee speaker device accommodating space's gas tightness.

[ description of the drawings ]

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained without inventive work, wherein:

fig. 1 is an exploded view of a preferred embodiment of a speaker device according to the present invention;

fig. 2 is an enlarged view of a portion a of the speaker device shown in fig. 1;

fig. 3 is a schematic structural view of a flexible circuit board in the speaker device shown in fig. 1;

fig. 4 is a schematic view of the structure of a housing in the speaker device shown in fig. 1;

fig. 5 is a schematic structural view of a frame in the speaker device shown in fig. 1;

fig. 6 is an assembled perspective view of the speaker device shown in fig. 1;

fig. 7 is a sectional view of the speaker apparatus shown in fig. 6 in a direction a-a;

fig. 8 is an enlarged view of a portion b of the speaker device shown in fig. 7;

fig. 9 is a sectional view of the speaker apparatus shown in fig. 6 in the direction B-B;

fig. 10 is a schematic view of the structure of the enclosure and the cabinet in the speaker device shown in fig. 9.

[ 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 efforts belong to the protection scope of the present invention.

Referring to fig. 1 to 10, a speaker device includes a housing 100, a housing 1 having a receiving space 10, and a speaker unit 2 received in the housing 1, where the housing 1 includes an inner wall 151 enclosing the receiving space 10.

The loudspeaker unit 2 comprises a fixed ring 5 fixed in the shell 1, a vibration system 3 fixed on the fixed ring 5 and a magnetic circuit system 4.

Vibration system 3 is including vibrating the sound production and being fixed in gu fixed ring 5's vibrating diaphragm 31 and drive the voice coil 33 of vibrating diaphragm 31 vibration.

The diaphragm 31 includes a middle portion 311 located at a central position, a folded ring portion 313 formed by extending outward from an outer peripheral edge of the middle portion 311, a holding portion 315 formed by extending outward from an outer peripheral edge of the folded ring portion 313, and an extending portion 317 formed by bending and extending from an outer peripheral edge of the holding portion 315, the holding portion 315 is fixed to a surface of the fixed ring 5 away from the magnetic circuit system 4 along the vibration direction X, and the extending portion 317 is sandwiched between the fixed ring 5 and the inner wall 151 of the housing 1.

Wherein, the surface of the extension 317 facing the inner wall 151 is convex towards the inner wall 151 to form a first convex ring 318 arranged around the fixing ring 5.

The inner wall 151 is recessed in a direction away from the extension 317 to form a first sealing groove 1A, and the first protruding ring 318 is received and fixed in the first sealing groove 1A. When the diaphragm 31 is assembled with the housing 1 and the fixing ring 5, the first protruding ring 318 is accommodated and fixed in the first sealing groove 1A, and the first protruding ring 318 and the first sealing groove 1A form a sealing connection, that is, are fixed in the first sealing groove 1A by extrusion under the clamping force between the fixing ring 5 and the housing 1.

In this embodiment, the casing 100 is pressed on a surface of the holding portion 315 away from the fixing ring 5, and a second protruding ring 319 disposed around the folded ring portion 313 is formed on a surface of the holding portion 315 away from the fixing ring 5 and protruding toward the casing 100. The surface of the casing 100 facing the holding portion 315 is recessed towards a direction away from the holding portion 315 to form a second sealing groove 100A corresponding to the second convex ring 319, and the second convex ring 319 is received and fixed in the second sealing groove 100A. When the casing 100 is fixed to the fixing portion 315, the second protruding ring 319 forms a sealing connection with the second sealing groove 100A under the clamping force between the fixing ring 5 and the casing 100, that is, the second protruding ring 319 is fixed in the second sealing groove 100A by pressing, so that the airtightness between the casing 100 and the fixing portion 315 can be ensured.

The magnetic circuit system 4 includes a yoke 41 fixed relative to the housing 1, a main magnetic portion 43 fixed to the yoke 41 and facing the diaphragm 31, and a secondary magnetic portion 45 surrounding the main magnetic portion 43, the main magnetic portion 43 and the secondary magnetic portion 45 are disposed at an interval to form a magnetic gap 4A, and the voice coil 33 is inserted into the magnetic gap 4A.

The main magnet portion 43 includes a main magnet 431 fixed to the yoke 41 on a side facing the diaphragm 31, and a pole core 433 fixed to a side of the main magnet 431 away from the yoke 41. The magnetic flux in the magnetic gap 4A can be increased by the magnetic conduction action of the pole core 433.

The main magnet 431 may be magnetic steel or a natural magnet. In this embodiment, the main magnet 431 is preferably magnetic steel.

The sub-magnetic portion 45 includes a plurality of sub-magnets 451 fixed to the yoke 41 on a side facing the diaphragm 31 and surrounding the main magnetic portion 43, and a clamp 453 covering a side of the plurality of sub-magnets 451 remote from the yoke 41.

The auxiliary magnet 451 may be a magnetic steel or a natural magnet. In the present embodiment, the sub-magnet 451 is preferably magnetic steel.

In the present embodiment, the chucking plate 453 is made of a magnetically conductive material. The magnetic flux in the magnetic gap 4A can be increased by the magnetic conductive action of the clamp plate 453, and thus the acoustic performance of the speaker device can be improved. It will be appreciated that in other embodiments, the clamping plates may also be made of a non-magnetically conductive material.

As shown in fig. 7 and 9, the pole body 433 is located in the through hole of the chucking plate 453 and is located in the same horizontal plane as the chucking plate 453.

As shown in fig. 1, 6 and 7, the main magnetic part 43 has a rectangular overall configuration, and four sub-magnets 451 are provided, two of the sub-magnets 451 being provided at intervals along the short axis side of the main magnetic part 43, and the other two sub-magnets 451 being provided at intervals along the long axis side of the main magnetic part 43.

It is to be understood that the structure of the main magnetic portion 43 and the sub magnetic portion 45 described above is not limited thereto. For example, the main magnet portion 43 may include only the main magnet; the main magnet 331 and the auxiliary magnet 451 can be formed by overlapping a plurality of magnetic steels along the vibration direction X, and in the vibration direction X, a pole core can be further arranged between two adjacent magnetic steels.

An isolation component 6 is arranged in the housing 1 and spaced from the diaphragm 31 along the vibration direction X, and the isolation component 6 divides the accommodating space 10A into a first cavity 10B and a second cavity 10C. The isolation component 6 and the housing 1 enclose to form the first cavity 10B, and the diaphragm 31, the housing 1 and the isolation component 6 enclose to form the second cavity 10C.

The spacer assembly 6 includes a support ring 61 fixed to the yoke 41 and a ventilation spacer 63 fixed to the support ring 61 and the yoke 41, a ventilation passage 4B is formed between the support ring 61 and the yoke 41, the first cavity 10B and the second cavity 10C are in airflow communication with each other through the ventilation spacer 63 and the ventilation passage 4B, and the housing 1 protrudes into the first cavity 10B to form a protrusion 7 supporting the support ring 61. An air-permeable passage 4B is formed between the support ring 61 and the yoke 41. By providing the air-permeable passage 4B, the first chamber 10B and the second chamber 10C can be made to be in air-flow communication via the air-permeable partition 63. The magnetic circuit system 4 can be fixed in the housing 1 by the cooperation of the fixing ring 5, the supporting ring 61 and the protrusion 7, which not only has a simple structure to facilitate the assembly of the speaker device, but also divides the accommodating space 10A into a first cavity 10B and a second cavity 10C by the isolation component 6, and the first cavity 10B and the second cavity 10C can be in air flow communication through the air-permeable partition 63 of the isolation component 6, so that the first cavity 10B can be filled with a sound-absorbing material (not shown) to improve the acoustic performance of the speaker device.

As shown in fig. 7, both ends of the yoke 41 in the short axis direction of the voice coil 33 are fixed to the support ring 61, and both ends thereof in the long axis direction of the voice coil 33 are spaced from the support ring 61 to form the air-permeable passage 4B.

In this embodiment, a side of the yoke 41 away from the diaphragm 31 is fixedly connected to the air-permeable spacer 63.

As shown in fig. 7 and 9, a through hole 4C extending in the vibration direction X is formed through the yoke 41 and the main magnetic portion 43, and the air-permeable spacer 63 covers the through hole 4C. The through hole 4C can increase the volume of airflow circulation when airflow exchange occurs between the first cavity 10B and the second cavity 10C, thereby facilitating improvement of the acoustic performance of the speaker device. It is understood that, in other embodiments, the through holes may not be formed on the yoke 41 and the main magnetic portion 43.

Wherein, the sound-absorbing material can be sound-absorbing cotton, sound-absorbing particles, sound-absorbing powder and the like. In the present embodiment, the sound-absorbing material is sound-absorbing particles or/and sound-absorbing powder.

As shown in fig. 4 and 6, in order to facilitate filling the sound-absorbing material in the first cavity 10B, a powder filling hole 1B communicated with the first cavity 10B is penetratingly formed at a position of the housing 1 corresponding to the first cavity 10B, and correspondingly, a sealing cover 1C for sealing the powder filling hole 1B is further fixedly formed on the housing 1.

As shown in fig. 1, the projection 7 is stamped and formed from the housing 1; the bump 7 is provided with a plurality of bumps 7, and the bumps 7 are arranged at intervals. It is understood that in other embodiments, the bumps 7 may be arranged in a ring structure.

The housing 1 includes a main body 11, a first bending portion 13 formed by bending and extending from an edge of the main body 11 in a direction away from the voice coil 33, and a second bending portion 15 formed by bending and extending from an end of the first bending portion 13 away from the main body 11, wherein the bump 7 is located on the main body 11, the first bending portion 13 is located on a side of the fixing ring 5 away from the fixing portion 315, and the extending portion 317 is sandwiched between the fixing ring 5 and the second bending portion 15. It should be understood that the housing 1 is open at one end, that is, the second bent portion 15 is surrounded to form an opening, and the diaphragm 31 is fixed to the second bent portion 15 and covers the opening of the housing 1, that is, the speaker device in this embodiment is without a front cover.

The vibration system 3 further includes a supporting device 35 disposed at an interval with the holding portion 315 along the vibration direction X, one end of the supporting device 35 is clamped between the fixing ring 5 and the first bending portion 13, and the other end of the supporting device is connected to the diaphragm 31 through a framework 8. When the voice coil 33 is energized, the voice coil 33 will vibrate under the action of the magnetic field of the magnetic circuit system 4, and at the same time, the voice coil 33 will drive the diaphragm 31 to vibrate together, and the diaphragm 31 will drive the support device 35 to vibrate together when vibrating.

As shown in fig. 7 and 8, two supporting devices 35 are provided, and the two supporting devices 35 are spaced apart along the long axis of the main magnetic portion 43. The support device 35 can limit the swing of the voice coil 33 along the long axis direction, and the pure sound effect of the loudspeaker device is improved.

The supporting device 35 includes a flexible circuit board 37 and an auxiliary diaphragm 39, the flexible circuit board 37 includes a first fixing portion 371 fixed to the fixing ring 5, a second fixing portion 373 fixed to the bobbin 8, an elastic connection portion 375 connecting the first fixing portion 371 and the second fixing portion 373, and a pad portion 377 extending from the second fixing portion 373, an outer edge of the auxiliary diaphragm 39 is fixed to the first fixing portion 371, and an inner edge of the auxiliary diaphragm 39 is fixed to the second fixing portion 373, wherein a first pad 378 connected to an external circuit is formed on the first fixing portion 371, a second pad 379 electrically connected to the voice coil 33 is formed on the pad portion 377, and a window 131 exposing the first pad 378 is formed on the first bending portion 13. The voice coil 33 can be electrically connected to an external circuit by providing the flexible circuit board 37, and the acoustic performance of the speaker device can be improved by providing the auxiliary diaphragm 39.

In the present embodiment, it is preferable that the flexible circuit board 37 of only one of the supporting devices 35 is electrically connected to the voice coil 33. This can reduce the welding and wire sealing processes.

Referring to fig. 1, it is further preferable that, when only one flexible circuit board 37 of the supporting device 35 is electrically connected to the voice coil 33, the other flexible circuit board 37 is not provided with the first pad, the pad portion, and the second pad formed on the pad portion.

Still further preferably, when the flexible circuit board 37 of only one of the supporting devices 35 is electrically connected to the voice coil 33, the other flexible circuit board may be replaced by a non-conductive board made of the base material of the flexible circuit board or made of other materials, so that the use cost of the circuit board can be reduced.

As shown in fig. 8, the first fixing portion 371 is fixed to the fixing ring 5, the second fixing portion 373 is fixed to the frame 8, and the outer edge of the auxiliary diaphragm 39 is further fixed to the first bending portion 13. It is to be understood that, in an embodiment of the present invention, the first fixing portion may be further fixed to the first bending portion, an outer edge of the auxiliary diaphragm is further fixed to the fixing ring, an inner edge of the auxiliary diaphragm is fixed to the framework, and accordingly, an opening of the edge of the auxiliary diaphragm is disposed to be away from the upper diaphragm.

It is understood that in other embodiments, the support device 35 may not include the auxiliary diaphragm.

In the present embodiment, the intermediate portion 311 has a cutout hole 31A, the reinforcing plate 9 is provided in the cutout hole 31A, the bobbin 8 includes a first connecting portion 81 connecting the reinforcing plate 9 and the intermediate portion 311, a second connecting portion 83 extending from the first connecting portion 81 in the direction of the magnetic circuit system 4, and a third connecting portion 85 provided at an interval from the second connecting portion 83, the voice coil 33 is fixed to a side of the second connecting portion 83 away from the first connecting portion 81, and the support device 35 is fixed to a side of the third connecting portion 85 away from the first connecting portion 81.

Compared with the prior art, the utility model discloses a speaker device and adopt mobile terminal equipment of this speaker device pass through extension 317 orientation one side arch of shell 1 is formed with the ring around the first bulge loop 318 that solid fixed ring 5 set up, and forms first seal groove 1A on shell 1's the inner wall 151, and first bulge loop 318 accepts and is fixed in first seal groove 1A, first bulge loop 318 is in gu fixed ring 5 with form sealing connection with first seal groove 1A under the effect of shell 1 clamping force to can guarantee speaker device accommodating space's gas tightness.

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 loudspeaker device comprises a shell with an accommodating space and a loudspeaker single body accommodated in the shell, wherein the loudspeaker single body comprises a fixing ring fixed on the shell, a vibration system fixed on the fixing ring and a magnetic circuit system, the vibration system comprises a vibrating diaphragm which is used for vibrating and sounding and fixed on the fixing ring, the vibrating diaphragm comprises a middle part positioned at a central position, a folded ring part formed by outwards extending the outer periphery of the middle part, a fixing part outwards extending the outer periphery of the folded ring part and an extending part formed by bending and extending the outer periphery of the fixing part, the fixing part is fixed on the surface of the fixing ring far away from the magnetic circuit system along the vibration direction, the loudspeaker device is characterized in that the shell comprises an inner wall surrounding the accommodating space, the fixing ring is abutted and fixed on the inner wall, and the extending part is clamped between the fixing ring and the inner wall, the extension part towards the surface of inner wall to the inner wall direction arch is formed with and encircles the first bulge loop that solid fixed ring set up, the inner wall is to keeping away from the sunken first seal groove that forms of direction of extension part, first bulge loop is acceptd and is fixed in first seal groove.

2. The speaker assembly of claim 1 wherein said first collar is press fit into said first seal groove.

3. The speaker device according to claim 1, further comprising a housing pressed on a surface of the fixing portion away from the fixing ring, wherein a second protruding ring protruding toward the housing is formed on a surface of the fixing portion away from the fixing ring, and the second protruding ring is recessed toward the fixing portion to form a second sealing groove corresponding to the second protruding ring, and the second protruding ring is received and fixed in the second sealing groove.

4. The speaker assembly of claim 3 wherein said second collar is press fit into said second seal groove.

5. The speaker device as claimed in claim 1, wherein the magnetic circuit system includes a yoke fixed to the housing, and a main magnetic portion fixed to a side of the yoke facing the diaphragm and a sub magnetic portion disposed around the main magnetic portion, the main magnetic portion and the sub magnetic portion being disposed at an interval to form a magnetic gap, and a voice coil being inserted into the magnetic gap.

6. The speaker device as claimed in claim 5, wherein the sub magnetic portion includes a plurality of sub magnets fixed to a side of the yoke facing the diaphragm and disposed around the main magnetic portion, and a clamp plate covering a side of the plurality of sub magnets away from the yoke.

7. The speaker device according to any one of claims 5 or 6, wherein the vibration system further includes a supporting device spaced from the holding portion along the vibration direction, one end of the supporting device is sandwiched between the fixing ring and the housing, and the other end of the supporting device is connected to the diaphragm through a skeleton.

8. The speaker device according to claim 7, wherein the supporting device includes a flexible circuit board and an auxiliary diaphragm, the flexible circuit board includes a first fixing portion fixed to the fixing ring, a second fixing portion fixed to the frame, an elastic connecting portion connecting the first fixing portion and the second fixing portion, and a pad portion formed by extending from the second fixing portion, an outer edge of the auxiliary diaphragm is fixed to the first fixing portion, and an inner edge of the auxiliary diaphragm is fixed to the second fixing portion, wherein a first pad connected to an external circuit is formed on the first fixing portion, and a second pad electrically connected to the voice coil is formed on the pad portion.

9. The speaker device as claimed in claim 8, wherein the middle portion has a cutout hole, a reinforcing plate is disposed in the cutout hole, the bobbin includes a first connecting portion connecting the reinforcing plate and the middle portion, a second connecting portion extending from the first connecting portion toward the magnetic circuit system, and a third connecting portion spaced from the second connecting portion, the voice coil is fixed to the second connecting portion on a side away from the first connecting portion, and the support device is fixed to the third connecting portion on a side away from the first connecting portion.

10. The speaker device according to claim 5, wherein an isolation assembly is disposed in the housing and spaced from the diaphragm along a vibration direction, the isolation assembly separates the accommodating space into a first cavity and a second cavity, the isolation assembly includes a support ring fixed to the yoke and a ventilation spacer fixed to the support ring and the yoke, a ventilation channel is formed between the support ring and the yoke, the first cavity and the second cavity are in airflow communication with each other through the ventilation spacer and the ventilation channel, and the housing protrudes into the first cavity to form a protrusion for supporting the support ring, wherein the isolation assembly and the housing enclose the first cavity, and the diaphragm, the housing and the isolation assembly enclose the second cavity.

11. A loudspeaker device as claimed in claim 10, characterized in that the side of the yoke facing away from the diaphragm is fixedly connected to the air-permeable partition.

12. The speaker device as claimed in claim 11, wherein said yoke and said main magnetic portion are perforated with through holes extending in said vibration direction, and said air-permeable partition member covers said through holes.

13. The speaker device according to claim 10, wherein the housing includes a main body portion, a first bending portion formed by bending and extending from an edge of the main body portion in a direction away from the voice coil, and a second bending portion formed by bending and extending from an end of the first bending portion away from the main body portion, wherein the protrusion is located on the main body portion, the first bending portion is located on a side of the fixing ring away from the fixing portion, and the extending portion is sandwiched between the fixing ring and the second bending portion.

14. A mobile terminal device comprising a speaker arrangement according to any of claims 1-13, the housing of the speaker arrangement being a housing of the mobile terminal device.