CN214627352U

CN214627352U - Loudspeaker

Info

Publication number: CN214627352U
Application number: CN202023200894.9U
Authority: CN
Inventors: 肖波; 令狐荣林; 孔晨亮; 章统
Original assignee: AAC Acoustic Technologies Shenzhen Co Ltd; AAC Microtech Changzhou Co Ltd
Current assignee: AAC Technologies Holdings Shenzhen Co Ltd; AAC Microtech Changzhou Co Ltd
Priority date: 2020-12-25
Filing date: 2020-12-25
Publication date: 2021-11-05
Anticipated expiration: 2030-12-25

Abstract

The utility model provides a loudspeaker, including basin frame, rigid coupling in the vibration system of basin frame and the magnetic circuit that has the magnetic gap, magnetic circuit includes the lower plate, set up in the lower plate towards the limit magnet steel that has the magnetic gap between the upward vibrating diaphragm one side of inner magnet steel periphery and the inner magnet steel and set up in the punch holder of limit magnet steel towards upward vibrating diaphragm one side, the punch holder is fixed in basin frame, this loudspeaker are still including setting up in the screen cloth of lower plate back to upward vibrating diaphragm one side, wherein: a through hole is formed in the first long shaft side of the upper clamping plate; a groove is arranged on the second long shaft side of the screen cloth corresponding to the through hole; in addition, a plurality of reinforcing ribs are arranged at the contact positions of the first long shaft edge of the upper clamping plate and the side magnetic steel, and avoidance parts are arranged at the positions of the side magnetic steel corresponding to the reinforcing ribs. The loudspeaker is larger in powder filling volume and better in sound production effect, can resist vibration caused by sound frequency outside the broadcast and amplification volume, and is not easy to damage.

Description

Loudspeaker

[ technical field ] A method for producing a semiconductor device

The utility model relates to an acoustoelectric conversion field especially relates to a loudspeaker.

[ background of the invention ]

With the advent of the mobile internet age, the number of portable intelligent devices is increasing. Among the various portable devices, the smart phone is undoubtedly the most common and portable intelligent device. At present, the functions of a smart phone are very diverse, one of them is a high-quality audio play function, and a speaker in the smart phone is one of the necessary conditions for realizing the high-quality audio play function.

The existing loudspeaker generally comprises a frame for accommodating a magnetic circuit system and a vibration system, wherein the magnetic circuit system comprises an annular edge magnet and magnetic steel assembled in the annular edge magnet and forming a magnetic gap with the annular edge magnet; the vibration system comprises a vibration diaphragm fixedly arranged on the periphery of the basin frame and a voice coil inserted into the magnetic gap and driving the vibration diaphragm to vibrate. When the voice coil is electrified, the voice coil in the magnetic gap can move under the action of a magnetic field, and along with the change of the current, the movement can also change, so that the vibrating diaphragm is driven to vibrate up and down, and the sound is generated.

However, the shape of the housing of the speaker is irregular, and the sound-transmitting mesh is arranged in the horizontal direction, so that the space for filling the sound-absorbing material in the speaker is insufficient, and the acoustic performance of the speaker is poor. In addition, to cope with some application scenarios requiring a large volume of outgoing audio, the vibration of the speaker is intensified. As shown in fig. 2, the upper plate 204 'and the side magnetic steel 205' of the conventional speaker do not have any reinforcing structure, and the vibration when playing audio with large volume may cause damage to the speaker.

Therefore, there is a need for a loudspeaker that overcomes the above-mentioned disadvantages.

[ Utility model ] content

An object of the utility model is to provide a irritate bigger, the better speaker of sound production of powder volume to this speaker can tolerate and broadcast the vibration that the volume playback frequency brought and be difficult to damage.

The utility model discloses in one aspect technical scheme as follows: the utility model provides a loudspeaker, including basin frame, rigid coupling in the vibration system of basin frame and the magnetic circuit that has the magnetic gap, vibration system is including being fixed in the last vibrating diaphragm of basin frame with insert and locate the voice coil loudspeaker voice coil in magnetic gap, magnetic circuit include the lower plate, set up in the lower plate orientation interior magnet steel, the ring of going up vibrating diaphragm one side are located interior magnet steel periphery and with have between the interior magnet steel the limit magnet steel in magnetic gap with set up in the limit magnet steel orientation the punch holder of going up vibrating diaphragm one side, the punch holder is fixed in the basin frame, wherein:

the upper clamping plate comprises a first short shaft side and a first long shaft side which is adjacent to the edge of the first short shaft side, and the first long shaft side is provided with a through hole; the loudspeaker also comprises a mesh cloth arranged on one side of the lower clamping plate back to the upper vibrating diaphragm, the mesh cloth comprises a second short shaft side and a second long shaft side adjacent to the edge of the second short shaft side, the second long shaft side and the first long shaft side are arranged opposite to each other along the vibration direction of the upper vibrating diaphragm, and a groove which is sunken towards the upper clamping plate is arranged on the second long shaft side corresponding to the through hole;

the first long shaft edge of the upper clamping plate is provided with a plurality of reinforcing ribs at the contact positions with the side magnetic steels, and the side magnetic steels correspond to the reinforcing ribs and are provided with avoidance parts.

Preferably, the width of the reinforcing bead is equal to the width of the first major-axis side.

Preferably, two reinforcing ribs are respectively arranged on each first long shaft edge of the upper clamping plate, and the adjacent reinforcing ribs on different first long shaft edges are arranged in pairwise symmetry.

Preferably, the reinforcing bars have a rectangular cross section, which is parallel to the vibration direction of the vibration system.

Preferably, the groove is formed by enclosing a first side wall and a bottom wall, the first side wall is at least partially located in the through hole, the bottom wall is located in the through hole, and the bottom wall is flush with the surface of one side, facing the upper diaphragm, of the upper clamping plate.

Preferably, the vibration system further comprises a voice coil for driving the upper vibrating diaphragm to sound, a flexible circuit board electrically connected with the voice coil and an external electric signal, a framework fixed on the flexible circuit board and supporting the upper vibrating diaphragm, and a lower vibrating diaphragm located below the flexible circuit board.

Preferably, the framework comprises a support table fixed on the upper vibrating diaphragm and a side wall extending from the support table to a direction far away from the upper vibrating diaphragm to be in contact with the flexible circuit board.

Preferably, the magnetic circuit system further comprises a pole core and an external magnetic steel which are sequentially arranged on the internal magnetic steel, wherein the external magnetic steel is convex and comprises a protruding portion, and the protruding portion protrudes along the vibration direction of the vibration system and away from the internal magnetic steel.

Preferably, the vibration system further comprises a frame-shaped vibration ring sleeved on the protruding portion of the external magnetic steel and a middle vibration film filled between the frame-shaped vibration ring and the framework.

Preferably, the upper diaphragm includes a dome located on the skeleton and surrounding the middle diaphragm, and a corrugated rim surrounding the dome.

The beneficial effects of the utility model reside in that: the second major axis limit of screen cloth is provided with the sunken recess of splint in the orientation corresponding to the through-hole, and this recess can be used for pouring sound absorbing material, has increased the equivalent volume that is used for filling sound absorbing material's space and speaker rear chamber in the speaker, has improved the sound producing effect of speaker.

In addition, the reinforcing ribs are arranged on the upper clamping plate in the magnetic circuit system, so that the strength of the upper clamping plate is improved, and the hidden danger of deformation of the upper clamping plate under the vibration of the voice coil is prevented; meanwhile, an avoiding part which is sunken towards the protruding direction of the reinforcing rib is formed on the side magnetic steel, and the avoiding part is formed at a position corresponding to the reinforcing rib.

[ description of the drawings ]

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, 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 according to these drawings without creative efforts.

Fig. 1 is an exploded schematic view of a speaker according to the present invention;

FIG. 2 is a schematic view of the side magnets and top clamp plate of a prior art loudspeaker;

fig. 3 is a schematic view of the side magnetic steel, the upper clamp plate and the mesh cloth of the speaker provided by the present invention;

fig. 4 is a top view and a cross-sectional view along a-a of the speaker provided by the present invention;

fig. 5 is a schematic diagram of a part of components of a speaker provided by the present invention;

fig. 6 is a schematic diagram of a part of components of a speaker provided by the present invention;

fig. 7 is a schematic diagram of a framework in a speaker provided by the present invention;

fig. 8 is a schematic view of magnets constituting a magnetic circuit system of a speaker according to the present invention;

fig. 9 is a schematic diagram of a part of components of the speaker provided by the present invention.

[ 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. It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

In an embodiment of the present invention, as shown in fig. 1, 3 and 4, a speaker 100 is provided, which includes a frame 40, a vibration system 30 fixed to the frame 40, and a magnetic circuit system 20 having a magnetic gap, where the vibration system 30 includes an upper diaphragm 301 fixed to the frame 40 and a voice coil 305 inserted into the magnetic gap, the magnetic circuit system 20 includes a lower plate 206, an inner magnetic steel 203 disposed on a side of the lower plate 206 facing the upper diaphragm 301, an edge magnetic steel 205 annularly disposed around a periphery of the inner magnetic steel 203 and having a magnetic gap with the inner magnetic steel 203, and an upper plate 204 disposed on a side of the edge magnetic steel 205 facing the upper diaphragm 301, and the upper plate 204 is fixed to the frame 40.

The upper splint 204 includes a first short axis edge 204b and a first long axis edge 204a adjacent to the edge of the first short axis edge 204b, and the first long axis edge 204a is provided with a through hole 2042; the speaker 100 further includes a mesh 10 disposed on a side of the lower clamp plate 206 facing away from the upper diaphragm 301, where the mesh 10 includes a second short-axis side 10b and a second long-axis side 10a adjacent to an edge of the second short-axis side 10b, the second long-axis side 10a is disposed opposite to the first long-axis side 204a along a vibration direction of the upper diaphragm 301, and the second long-axis side 10a is provided with a groove 101 recessed toward the upper clamp plate 204 corresponding to the through hole 2042.

In addition, a plurality of reinforcing ribs 2041 are further arranged at the positions, which are in contact with the side magnetic steels 205, on the first long-axis side 204a of the upper clamping plate 204, and escape parts 2051 are arranged at the positions, corresponding to the reinforcing ribs 2041, of the side magnetic steels 205.

Specifically, the frame 40 serves as an integral frame of the speaker 100, and has a receiving space therein, the magnetic circuit system 20 and the vibration system 30 are received in the receiving space, the magnetic circuit system 20 includes an upper plate 204, and an inner magnetic steel 203 and a side magnetic steel 205 attached to the upper plate 204, and the upper plate 204 is used for clamping the inner magnetic steel 203 and the side magnetic steel 205 on the frame 40.

Further, the upper diaphragm 301 is disposed on a side of the voice coil 305 away from the upper plate 204, and is supported by a bobbin 307 described below. When the voice coil 305 is energized, electromagnetic induction is generated and the voice coil vibrates by interacting with the magnetic field of the magnetic circuit system 20, so that the upper diaphragm 301 is driven to vibrate and generate sound. In order to allow the magnetic field of the voice coil 305 to interact with the magnetic field generated by the magnetic circuit system 20, the voice coil 305 is at least partially disposed in the magnetic gap, i.e. the voice coil 305 is in the magnetic field generated between the inner magnetic steel 203 and the side magnetic steel 205.

As shown in fig. 3, in the embodiment provided by the present invention, at least one reinforcing rib 2041 is respectively disposed on the first long axis sides 204a on both sides of the upper plate 204, and the reinforcing ribs 2041 are symmetrically distributed for enhancing the strength of the upper plate 204 and enhancing the reliability of the speaker 100. In contrast, as shown in fig. 2, in the prior art, the upper clamp plate 204 'and the side magnetic steel 205' of the conventional speaker do not have any reinforcing structure, and the upper clamp plate without the reinforcing ribs is prone to deformation under the vibration caused by the loud external sound frequency of the speaker.

Furthermore, the loudspeaker 100 may further comprise a mesh fabric 10, preferably the mesh fabric 10 is a mesh fabric. The mesh cloth 10 is disposed on a side of the lower clamp plate 206 facing away from the upper diaphragm 301. The web 10 includes a second minor edge 10b and a second major edge 10a, the second major edge 10a being adjacent an edge of the second minor edge 10 b. The second long axial side 10a is provided with a groove 101, and the groove 101 is recessed toward the upper clamp plate 34 so that a notch of the groove 101 faces away from the upper diaphragm 301. The groove 101 may be used to pour a sound-absorbing material when the speaker 100 is installed in a speaker box, thereby increasing a space for filling the sound-absorbing material in the speaker 100 and an equivalent volume of a rear cavity of the speaker 100, thereby improving a sound-emitting effect of the speaker 100. As shown in fig. 3, the second long axis side 10a and the first long axis side 204a are disposed opposite to each other along the vibration direction of the upper diaphragm 301, the first long axis side 204a is provided with a through hole 2042 adapted to the groove 101, and the through hole 2042 is used for avoiding the groove 101.

As shown in fig. 3, the side magnetic steel 205 is formed with an escape portion 2051 that is recessed in a direction in which the rib 2041 protrudes, and the escape portion 2051 is provided at a position corresponding to the rib 2041. Specifically, the avoiding portion 2051 is recessed to form a space for accommodating the rib 2041, and the avoiding portion 2051 is formed at a position corresponding to the rib 2041, so that the upper plate 204 and the side magnetic steel 205 can be tightly combined, thereby further enhancing the reliability of the speaker 100.

In another specific embodiment, as shown in fig. 3, the width of the rib 2041 is equal to the width of the first long-axis side 204 a. Preferably, for optimum reinforcement, the width of the rib 2041 is equal to the width of the first long axis side 204a of the upper clamping plate 204, i.e., the rib 2041 is distributed over the first long axis side 204a of the upper clamping plate 204 in the transverse direction.

In another specific embodiment, as shown in fig. 3 and 4, each first long-axis side 204a of the upper clamping plate 204 is provided with two reinforcing ribs 2041, and the adjacent reinforcing ribs 2041 on different first long-axis sides 204a are arranged symmetrically in pairs. Specifically, in order to further enhance the reliability of the speaker 100, two reinforcing ribs 2041, four reinforcing ribs 2041 in total, are respectively disposed on two sides of the upper plate 204 surrounding the internal magnetic steel 203, and the reinforcing ribs 2041 on two sides of the upper plate 204 are symmetrically distributed, and a preset distance is provided between the two reinforcing ribs 2041 on each side. Correspondingly, the side magnetic steel 205 is also provided with four avoiding portions 2051, and the positions of the avoiding portions are in one-to-one correspondence with the reinforcing ribs 2041.

In another specific embodiment, as shown in fig. 4, the ribs 2041 have a rectangular cross section that is parallel to the direction of vibration of the vibration system 30. Specifically, in order to further enhance the reliability of the speaker 100, the rib 2041 has a rectangular cross section, which may be square or rectangular, and may be determined according to the actual shape of the speaker 100. Further, the rib 2041 may be a block protruding perpendicularly to the top surface of the upper plate 204, and the block has a rectangular cross section. In some alternative embodiments, the corners of the ribs 2041 may be chamfered or rounded to achieve good retention and reduce damage to the device during production and transportation. Correspondingly, the shape of the avoiding portion 2051 on the side magnetic steel 205 is matched with the shape of the rib 2041, so that the rib 2041 can be accommodated in a space formed by the avoiding portion 2051.

In another alternative embodiment, the ribs 2041 have a non-rectangular cross-section that is parallel to the direction of vibration of the diaphragm 301. The non-rectangular shape may be a hexagonal shape or a trapezoidal shape, and may be determined according to the actual shape of the speaker 100. Correspondingly, the shape of the avoiding portion 2051 on the side magnetic steel 205 is matched with the shape of the rib 2041, so that the rib 2041 can be accommodated in a space formed by the avoiding portion 2051.

In another specific embodiment, as shown in fig. 3, the groove 101 is formed by a first sidewall 101a and a bottom wall 101b, the first sidewall 101a is at least partially located in the through hole 2042, the bottom wall 101b is located in the through hole 2042, and the bottom wall 101b is flush with the surface of the upper clamp plate 204 facing the side of the upper diaphragm 301.

Specifically, the through hole 2042 is disposed opposite to the groove 101 in the vibration direction of the upper diaphragm 301, and the first sidewall 101a forming the groove 101 is at least partially located in the through hole 2042. It should be noted that the bottom wall 101b forming the groove 101 may be located in the through hole 2042, so that the bottom wall 101b is flush with the surface of the upper clamping plate 204 facing the upper diaphragm 301; in some alternative embodiments, the bottom wall 101b forming the groove 101 may not be located in the through hole 2042, so that the bottom wall 101b protrudes from the surface of the upper clamping plate 204 facing the upper diaphragm 301. In some alternative embodiments, through-hole 2042 is fitted to groove 101, meaning that through-hole 2042 has the same shape as groove 101 and the size of through-hole 2042 is larger than that of groove 101, so that first sidewall 101a and bottom wall 101b forming groove 101 can be located within through-hole 2042.

Specifically, the flexible wiring board 50 is provided on the short axis side of the frame 40, converts an external electric signal input from the external terminal 502 into a current for driving the voice coil 305, and transmits the current to the voice coil 305 through the connection terminal 501, and the voice coil 305 drives the upper diaphragm 301 to vibrate by the current. In an alternative embodiment, the flexible circuit board 50 is disposed on both of the opposing short axis sides of the basin stand 40.

In another specific embodiment, as shown in fig. 1 and 6, wherein fig. 6 is a bottom view of the speaker 100, the vibration system 30 further includes a flexible circuit board 50 electrically connecting the voice coil 305 and an external electrical signal, a bobbin 301 fixed to the flexible circuit board 50 and supporting the upper diaphragm 301, and a lower diaphragm 306 located below the flexible circuit board 50.

Specifically, the lower diaphragm 306 is located on the short axis side of the frame 40 and connected to the flexible wiring board 50, and the vibration generated by the voice coil 305 can be conducted to the lower diaphragm 306 and cause the lower diaphragm 306 to vibrate and emit sound.

In another specific embodiment, as shown in fig. 1 and fig. 7, the framework 307 includes a supporting base 307a fixed to the upper diaphragm 301 and a second sidewall 307b extending from the supporting base 307a to a direction away from the upper diaphragm 301 to contact with the flexible circuit board 50.

Specifically, the skeleton 307 is used to connect the vibration system 30 and the flexible wiring board 50, and drive the vibration system 30 to vibrate, and the skeleton 307 surrounds the magnetic circuit system 20, and includes a support base 307a connected to the upper diaphragm 301, and a second sidewall 307b in contact with the flexible wiring board 50 and away from the vibration system 30.

In another specific embodiment, as shown in fig. 8, the magnetic circuit system 20 further includes a pole core 202 and an external magnetic steel 201 sequentially disposed on an internal magnetic steel 203, the external magnetic steel 201 is of a convex shape and includes a protrusion 201a, and the protrusion 201a protrudes along the vibration direction of the vibration system 30 and away from the internal magnetic steel 203.

Specifically, in order to increase the magnetic field strength of the magnetic circuit system 20, the magnetic circuit system 20 includes, in addition to the inner magnetic steel 203 and the side magnetic steel 205, a pole core 202 and an outer magnetic steel 201 sequentially disposed on the inner magnetic steel 203, wherein the pole core 202 is sandwiched between the inner magnetic steel 203 and the outer magnetic steel 201. The projection shapes of the pole core 202 and the external magnetic steel 201 along the vibration direction of the vibration system 30 are the same as those of the internal magnetic steel 203.

In another specific embodiment, as shown in fig. 9, the vibration system 30 further includes a frame-shaped vibration ring 303 sleeved on the external magnetic steel 201, and a middle vibration film 304 filled between the frame-shaped vibration ring 303 and the skeleton 307.

Specifically, the frame-shaped vibration ring 303 is sleeved on the protruding portion 201a of the outer magnet 201 and used for fixing the middle vibration film 304. Further, the middle diaphragm 304 may isolate the magnetic circuit system 20 from the upper diaphragm 301, so as to avoid an acoustic short circuit problem caused by communication between the magnetic circuit system 20 and the upper diaphragm 301. In addition, the upper diaphragm 301, the middle diaphragm 304 and the lower diaphragm 306 can also limit the movement of the voice coil 305 in the non-vibration direction, so that the anti-swing capacity of the product is greatly improved, the performance of the product can be improved, and especially for a speaker with ultra-large amplitude, the effect is more obvious.

In another specific embodiment, still referring to fig. 9, the upper diaphragm 301 includes a dome 302 disposed on the skeleton 307 and surrounding the middle diaphragm 304, and a corrugated rim 301a surrounding the dome 302. Specifically, the dome 302 is attached to the frame 307, and the dome 302 has a flat structure and an opening in the middle. Specifically, the above-mentioned corrugated rim 301a surrounds the dome 302 and is recessed toward the inner magnetic steel 203 in the vibration direction of the vibration system 30, forming an arc-shaped structure.

In another alternative embodiment, the ribs 2041 are bonded to the relief 2051 by adhesion. Specifically, in order to further enhance the reliability of the speaker 100, the rib 2041 is bonded to the avoiding portion 2051, so as to prevent the rib 2041 from being separated from the avoiding portion 2051 due to vibration caused by the vibration system 30 when the speaker 100 plays audio, and the rib 2041 may be bonded by a material having a bonding property such as glue or double-sided tape, and the material may be selected as long as the rib 2041 can be bonded to the avoiding portion 2051. In other alternative embodiments, the bonding may be performed by a flexible bonding material, so that the rib 2041 and the relief portion 2051 have a certain cushion therebetween.

In another alternative embodiment, the ribs 2041 are interference fit with the relief 2051. Specifically, in order to simplify the process, the accommodating space formed by the avoiding portion 2051 on the side magnetic steel 205 can be in interference fit with the reinforcing rib 2041 protruding from the upper plate 204, that is, pressure is applied to the reinforcing rib 2041, so that the reinforcing rib is directly extruded into the accommodating space formed by the avoiding portion 2051.

The technical features of the above embodiments may be arbitrarily combined, and for the sake of brief description, all possible combinations of the technical features in the above embodiments are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features. Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The above examples only represent some embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. The utility model provides a loudspeaker, including basin frame, rigid coupling in the vibration system of basin frame and the magnetic circuit that has the magnetic gap, vibration system is including being fixed in the last vibrating diaphragm of basin frame with insert and locate the voice coil loudspeaker voice coil in magnetic gap, magnetic circuit include the lower plate, set up in the lower plate orientation interior magnet steel, the ring of going up vibrating diaphragm one side are located interior magnet steel periphery and with have between the interior magnet steel the limit magnet steel in magnetic gap with set up in the limit magnet steel orientation the punch holder of last vibrating diaphragm one side, the punch holder is fixed in basin frame, its characterized in that:

2. The loudspeaker of claim 1, wherein: the width of the reinforcing rib is equal to the width of the first long shaft side.

3. The loudspeaker of claim 1, wherein: two reinforcing ribs are respectively arranged on each first long shaft edge of the upper clamping plate, and different reinforcing ribs adjacent to the first long shaft edges are arranged in a pairwise symmetrical mode.

4. A loudspeaker according to any one of claims 1 to 3, wherein: the reinforcing ribs have rectangular cross sections, and the rectangular cross sections are parallel to the vibration direction of the vibration system.

5. The loudspeaker of claim 1, wherein: the groove is formed by enclosing a first side wall and a bottom wall, the first side wall is at least partially positioned in the through hole, the bottom wall is positioned in the through hole, and the bottom wall is flush with the surface of one side, facing the upper vibrating diaphragm, of the upper clamping plate.

6. The loudspeaker of claim 1, wherein: the vibration system further comprises a flexible circuit board, a framework and a lower vibrating diaphragm, wherein the flexible circuit board is electrically connected with the voice coil and an external electric signal, the framework is fixed on the flexible circuit board and supports the upper vibrating diaphragm, and the lower vibrating diaphragm is located below the flexible circuit board.

7. The loudspeaker of claim 6, wherein: the skeleton is including being fixed in go up the brace table of vibrating diaphragm and certainly the brace table is to keeping away from go up the vibrating diaphragm direction extend to with the second lateral wall of flexible line way board contact.

8. The loudspeaker of claim 7, wherein: the magnetic circuit system further comprises a pole core and an external magnetic steel which are sequentially arranged on the internal magnetic steel, the external magnetic steel is convex and comprises a protruding portion, and the protruding portion protrudes along the vibration direction of the vibration system and deviates from the internal magnetic steel.

9. The loudspeaker of claim 8, wherein: the vibration system further comprises a frame-shaped vibration ring sleeved on the protruding portion of the outer magnetic steel and a middle vibration film filled between the frame-shaped vibration ring and the framework.

10. The loudspeaker of claim 9, wherein: the upper vibrating diaphragm comprises a ball top and a folding ring, wherein the ball top is positioned on the framework and surrounds the middle vibrating diaphragm, and the folding ring surrounds the ball top.