WO2022126786A1

WO2022126786A1 - Loudspeaker box

Info

Publication number: WO2022126786A1
Application number: PCT/CN2020/141854
Authority: WO
Inventors: 任璋; 钟志威
Original assignee: 瑞声声学科技(深圳)有限公司; 瑞声光电科技(常州)有限公司
Priority date: 2020-12-18
Filing date: 2020-12-30
Publication date: 2022-06-23
Also published as: CN213906846U

Abstract

The present invention provides a loudspeaker box, comprising a front cover, a rear cover which is assembled with the front cover to form an accommodating cavity, and a sound generating unit and an air-permeable isolation cover provided in the accommodating cavity. The front cover is provided with a bottom wall and a support wall; the air-permeable isolation cover separates the sound generating unit from a rear cavity; the sound generating unit comprises a basket, and a vibration system and a magnetic circuit system respectively fixed to the basket, and an elastic support member; the elastic support member comprises a flexible circuit board; the flexible circuit board comprises a holding portion connected to the basket, a bonding portion connected to the vibration system, and an elastic arm which connects the holding portion and the bonding portion; the air-permeable isolation cover comprises a cover body attached to the magnetic circuit system, a gluing part fixed on the support wall, and a collapsing part which connects the cover body and the gluing part; the cover body is closer to the rear cover relative to the collapsing part; a positive projection of the elastic arm on the air-permeable isolation cover is located within the range of the collapsing part; and the elastic arm does not collide with the collapsing part when the flexible circuit board vibrates.

Description

speaker box

technical field

The invention relates to the field of acoustics and electricity, in particular to a speaker box used in portable electronic products.

Background technique

With the advent of the mobile Internet era, the number of smart mobile devices continues to rise. Among many mobile devices, mobile phones are undoubtedly the most common and portable mobile terminal devices. At present, the functions of mobile phones are extremely diverse, one of which is the high-quality music function. Therefore, speaker boxes for playing sound are widely used in today's smart mobile devices.

The loudspeaker box includes a housing with an accommodating cavity, and a sound-generating unit accommodated in the housing and dividing the accommodating cavity into a front cavity and a rear cavity, and the sound-generating unit includes a flexible circuit board. The full filling structure of the speaker box in the related art relies on a ventilating isolation cover (the ventilating isolation cover is a three-dimensional mesh or a metal mesh) covering the surrounding area of the sounding monomer to separate the sounding monomer and the powder application space to meet the powder filling requirements. However, such speaker enclosures cannot take advantage of the form space overflowed by the vibration of the flexible circuit board to be filled with powder.

Therefore, it is necessary to provide a new speaker box to solve the above technical problems.

technical problem

The purpose of the present invention is to provide a speaker box, which can improve the powder filling space.

technical solutions

In order to achieve the above object, the present invention provides a speaker box, comprising a front cover, a rear cover assembled with the front cover to form a accommodating cavity, a sounding unit and a ventilating isolation cover disposed in the accommodating cavity, the The sound-generating unit divides the accommodating cavity into a front chamber and a rear chamber, the front cover has a bottom wall and a support wall extending from the bottom wall and surrounding the sound-generating unit, the sound-generating unit is fixed on the The support wall and the air-permeable isolation cover separate the sound-generating unit from the rear cavity, and the sound-generating unit includes a basin frame, a vibration system and a magnetic circuit system respectively fixed on the basin frame, and an elastic support The elastic support member includes a flexible circuit board, and the flexible circuit board includes a holding part connected with the basin frame, a joint part connected with the vibration system, and an elastic force connecting the holding part and the joint part arm, the breathable isolation cover includes a cover body attached to the magnetic circuit system, a glued part fixed on the support wall, and a collapsed part connecting the cover body and the glued part, wherein the cover The body is closer to the back cover than the collapsed part, the orthographic projection of the elastic arm on the air-permeable isolation cover is located within the range of the collapsed part, and when the flexible circuit board vibrates, the elastic arm Does not collide with the collapsed portion.

Preferably, the elastic arm includes a non-deformable area extending from the holding portion toward the magnetic circuit system and a deformable area connecting the non-deformable area and the joint portion, the deformation area and the holding portion The parts are arranged at intervals, the collapsed part protrudes toward the bottom wall to form a convex hull, the orthographic projection of the non-deformation area on the air-permeable isolation cover is located within the range of the convex hull, and the deformation area The contour of the orthographic projection on the air-permeable isolation cover is spaced from the convex hull.

Preferably, the non-deformable area is attached to the convex hull.

Preferably, the vibration system includes a vibrating membrane fixed on the basin frame and enclosed with the bottom wall to form the front cavity and a voice coil for driving the vibrating membrane to vibrate and produce sound, the vibrating membrane facing the sound One side of the ring is connected with a frame, and the frame includes a frame body fixed on the diaphragm, a first connection part extending from the outer periphery of the frame body to a direction away from the diaphragm, and a frame body from the frame body A second connecting part is formed by extending the inner periphery of the diaphragm away from the vibrating membrane, the connecting part is connected with the first connecting part, and the voice coil is connected with the second connecting part.

Preferably, the elastic support further includes an auxiliary diaphragm, and the auxiliary diaphragm includes a first fixing portion fixed to the basin frame, a second fixing portion fixed to the first connecting portion, and connecting the first fixing portion to the first connecting portion. A fixing portion and a folded ring portion of the second fixing portion, the holding portion is fixed to the side of the first fixing portion away from the basin frame, and the joint portion is fixed to the second fixing portion away from all On one side of the first connecting portion, the folded ring portion protrudes in a direction away from the flexible circuit board, and the orthographic projection of the elastic arm on the auxiliary diaphragm is located within the range of the folded ring portion .

Preferably, a pad extending into the rear cavity is formed on the holding portion along a direction parallel to the bottom wall, the support wall is provided with a notch for avoiding the pad, and the front cover is further There is a boss extending from the bottom wall to the rear cavity, the speaker box further includes a soldering piece, and the soldering piece includes a main body part fixed on the bottom wall by injection molding, extending from the main body part to a first electrical connection part outside the accommodating cavity and fixed by injection molding on the bottom wall; an extension part formed by bending and extending from the main body part and injection molding in the boss; and a first electrical connection part formed by bending and extending from the extension part and injection-molded and fixed to the second electrical connection portion of the boss, wherein the first electrical connection portion is electrically connected to an external circuit, and the second electrical connection portion is exposed on the side of the boss away from the bottom wall , the pad is arranged on the second electrical connection part and is electrically connected with the second electrical connection part.

Preferably, the front cover includes a plastic part and a reinforcing rigid body that is injection-molded and fixed to the plastic part, the support wall is located on the plastic part, and the welding piece is injection-molded and fixed to the plastic part.

Preferably, the reinforcing rigid body comprises a main body and a plurality of surrounding walls extending from the main body into the plastic part, the surrounding walls enclose a conical through hole, and the conical through hole is formed by the plastic part. The conical through hole includes a first opening and a second opening, the first opening and the second opening are respectively provided at both ends of the conical through hole, and the second openings are opposite to each other. As the first opening is closer to the accommodating cavity, the size of the tapered through hole gradually decreases along the direction from the first opening to the second opening.

Preferably, the reinforcing rigid body is made of metal material, and the surrounding wall is stamped and formed from the body.

Preferably, the front cover or/and the rear cover is provided with a powder filling hole at a position facing the rear cavity, and the powder filling hole is covered with a sealing cover.

beneficial effect

Compared with the related art, the speaker box of the present invention includes a cover body attached to the magnetic circuit system, a glued part fixed on the support wall, and a collapse connecting the cover body and the glued part by arranging the breathable isolation cover. The cover body is closer to the back cover than the collapsed part, the orthographic projection of the elastic arm on the air-permeable isolation cover is located in the range of the collapsed part, and when the flexible circuit board vibrates, the The elastic arm does not collide with the collapsed portion, and when the auxiliary diaphragm vibrates, the ring portion does not collide with the collapsed portion. This maximizes the powder filling area by taking advantage of the flex overflow form factor.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, under the premise of no creative work, other drawings can also be obtained from these drawings, wherein:

FIG. 1 is an exploded view of a preferred embodiment of the speaker box of the present invention.

FIG. 2 is an exploded view of the front cover of the speaker enclosure shown in FIG. 1 .

FIG. 3 is an exploded view of a sound-generating unit in the speaker cabinet shown in FIG. 1 .

FIG. 4 is a schematic structural diagram of the flexible circuit board in the sounding unit shown in FIG. 3 .

FIG. 5 is a schematic structural diagram of the auxiliary diaphragm in the sound generating unit shown in FIG. 3 .

FIG. 6 is a schematic structural diagram of the skeleton in the sounding monomer shown in FIG. 3 .

FIG. 7 is a schematic structural diagram of a ventilating isolation cover in the speaker box shown in FIG. 1 .

FIG. 8 is a schematic structural diagram of a soldering piece in the speaker box shown in FIG. 1 .

FIG. 9 is a schematic structural diagram of the speaker box shown in FIG. 1 after the front cover and the solder tab are assembled.

FIG. 10 is a schematic structural diagram of the assembled speaker box shown in FIG. 1 .

FIG. 11 is a cross-sectional view of the speaker box shown in FIG. 10 along the direction A-A.

FIG. 12 is an enlarged view of part a in the speaker cabinet shown in FIG. 11 .

FIG. 13 is a cross-sectional view of the speaker box shown in FIG. 10 along the B-B direction.

Embodiments of the present invention

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Please refer to FIG. 1 to FIG. 13 , the speaker box includes a front cover 1 , a rear cover 2 assembled with the front cover 1 to form an accommodating cavity 10 , a sounding unit 3 and a ventilating isolation cover disposed in the accommodating cavity 10 4. The sounding unit 3 divides the accommodating cavity 10 into a front cavity 10A and a rear cavity 10B.

The front cover 1 has a bottom wall 1A and a support wall 1B extending from the bottom wall 1A and surrounding the sound-generating unit 3 , and the sound-generating unit 3 is held on the support wall 1B. The front cover 1 is also provided with a sound guide channel 10C that communicates with the outside world and the front cavity 10A, and the sound emitted by the sound-generating unit 3 is sequentially transmitted through the front cavity 10A and the sound guide channel 10C to the outside world.

The sound generating unit 3 includes a basin frame 5 , a vibration system 6 and a magnetic circuit system 7 respectively fixed on the basin frame 5 , and an elastic support 8 .

The vibration system 6 includes a diaphragm 61 fixed on the basin frame 5 and enclosed with the bottom wall 1A to form the front cavity 10A, and a voice coil 63 for driving the diaphragm 61 to vibrate and produce sound.

A frame 65 is connected to the side of the diaphragm 61 facing the voice coil 63 , the voice coil 63 is connected to the frame 65 , one end of the elastic support 8 is fixed to the basin frame 5 , and the other end thereof is fixed to the frame 65 . The voice coil 63 is connected to an external circuit. After the voice coil 63 is energized, the voice coil 63 vibrates under the action of the magnetic field of the magnetic circuit system 7. At the same time, the voice coil 63 drives the The diaphragm 61 , the frame 65 and the elastic support 8 vibrate together.

The frame 65 includes a frame body 651 fixed to the diaphragm 61 , a first connecting portion 653 extending from the outer periphery of the frame body 651 in a direction away from the diaphragm 61 , and a connecting portion 653 from the frame body 651 . A second connecting portion 655 formed on the inner periphery extending away from the diaphragm 63 , the elastic support 8 is connected to the first connecting portion 653 , and the voice coil 63 is connected to the second connecting portion 655 .

The magnetic circuit system 7 includes a yoke 71 , a main magnet 73 and a secondary magnet 75 fixed on the yoke 71 , a pole core 77 covered on the main magnet 73 , and a secondary magnet 75 covered on the main magnet 75 . The upper clamping plate 79 on the upper plate, the auxiliary magnet 75 is arranged around the main magnet 73 and forms a magnetic gap 7A with the main magnet 73, and the upper clamping plate 79 is fixed on the basin frame 5 to realize the magnetic The circuit system 7 is fixed on the basin frame 5 , and the voice coil 63 is inserted into the magnetic gap 7A, so that after the voice coil 63 is energized, the voice coil 63 will be in the magnetic field of the magnetic circuit system 7 . Vibrate under the action.

In this embodiment, the upper clamping plate 79 and the pole core 77 are both made of magnetically conductive material, so that the magnetic flux in the magnetic gap 7A can be enhanced.

The elastic support member 8 includes a flexible circuit board 81 and an auxiliary diaphragm 83 . As shown in FIG. 3 , there are two flexible circuit boards 81 and two auxiliary diaphragms 83 , wherein the flexible circuit boards 81 are a first flexible circuit board 81 a and a second flexible circuit board 81 b respectively.

The auxiliary diaphragm 83 includes a first fixing portion 831 fixed to the basin frame 5 , a second fixing portion 833 fixed to the first connecting portion 653 , and connecting the first fixing portion 831 and the second fixing portion 833 . The folded ring portion 835 of the fixed portion 833 .

The flexible circuit board 81 includes a holding portion 811 fixed on the side of the first fixing portion 831 away from the basin frame 5 , and a combination fixed on the side of the second fixing portion 833 away from the first connecting portion 653 . part 813 and the elastic arm 815 connecting the holding part 811 and the joint part 813, the ring part 835 protrudes in the direction away from the flexible circuit board 81, and the elastic arm 815 is in the auxiliary vibration The orthographic projection on the membrane 83 is located within the range of the collar portion 835 . That is to say, the holding portion 811 is connected to the basin frame 5 through the first fixing portion 831 of the auxiliary diaphragm 83 , and the coupling portion 813 is connected to the second fixing portion 833 of the auxiliary diaphragm 83 . It is fixed on the first connecting part 653 , and the connecting part 813 is connected with the vibration system 6 through the second fixing part 833 and the first connecting part 653 .

It can be understood that, in other embodiments, the elastic support member may also be configured to include only a flexible circuit board, that is, the holding portion of the flexible circuit board is fixed to the basin frame, and all the flexible circuit board The connecting portion is fixed to the first connecting portion.

On the one hand, the flexible circuit board 81 plays a role of supporting and fixing the frame 65 , and on the other hand, the first flexible circuit board 81 a is also used for connecting the voice coil 63 and an external circuit.

As shown in FIG. 4 , an extension portion 816 and a pad portion 817 are formed to extend from the coupling portion 813 of the first flexible circuit board 81a in sequence, and extend from the holding portion 811 of the first flexible circuit board 81a A pad 819 is formed parallel to the bottom wall 1A and extending into the back cavity 10B, and a gap 1C for avoiding the pad 819 is formed on the support wall 1B. Wherein, the holding portion 811 , the joint portion 813 , the elastic arm 815 and the extension portion 816 of the first flexible circuit board 81 a are provided with conductive paths to electrically connect the pads 819 and all of them. The pad portion 817 is connected to the lead wire of the voice coil 63 to electrically connect the voice coil 63, and the pad 819 is connected to an external circuit, so that the voice coil 63 The first flexible circuit board 81a is electrically connected to an external circuit, and when the sound-emitting device operates, the electrical signal of the external circuit is transmitted to the voice coil 63 through the first flexible circuit board 81a.

The front cover 1 also has a boss 1D extending from the bottom wall 1A into the rear cavity 10B.

The speaker box further includes a soldering piece 9, the soldering piece 9 includes a main body portion 91 that is injection-molded and fixed to the bottom wall 1A, extends from the main body portion 91 to the outside of the accommodating cavity 10 and is injection-molded and fixed to the bottom. The first electrical connection portion 93 of the wall 1A, the extension portion 95 formed by bending and extending from the main body portion 91 and injection-molded into the boss 1D, and the extension portion 95 being bent and extending from the extension portion 95 and being injection-molded and fixed to the The second electrical connecting portion 97 of the boss 1D, wherein the first electrical connecting portion 93 is electrically connected to an external circuit, wherein the second electrical connecting portion 97 is when the boss 1D is away from the bottom wall 1A. The side is exposed, and the pad 819 is disposed on the second electrical connection portion 97 and is electrically connected with the second electrical connection portion 97 to realize the electrical connection between the first flexible circuit board 81a and an external circuit. By arranging the soldering piece 9 to be injection-molded with the front cover 1 , it not only avoids the soldering piece from occupying the space of the rear cavity 10B, thereby helping to improve the powder filling space in the rear cavity 10B, and reducing the The assembly complexity of the speaker box also avoids the problem of using the injection molding joint to ensure the relative position of the pads and the breaking of the basin frame after injection molding.

As shown in FIG. 9 , the bonding pad 819 is far away from the outer contour of the product (the soldering piece 9 has a longer length), and the first electrical connection of the soldering piece 9 cannot be guaranteed depending on the strength of the soldering piece 9 itself The relative position of the part 93 and the second electrical connection part 97 in the injection mold. In this embodiment, the main body portion 91 is provided with a positioning hole 911 . By arranging the positioning holes 911 on the main body portion 91 , the relative positions of the first electrical connection portion 93 and the second electrical connection portion 97 in the injection mold can be ensured.

In this embodiment, the surface of the second electrical connection portion 97 on the side away from the extension portion 95 and the surface of the boss 1D away from the bottom wall 1A are coplanar.

As shown in FIG. 1 and FIG. 9 , two of the pads 819 and the solder tabs 9 are provided, and the two pads are respectively a positive pad and a negative pad, and are located on the side of the sounding unit 3 . On the same side, the two welding pieces 9 are respectively a positive electrode welding piece and a negative electrode welding piece. It can be understood that, in other embodiments, grounding pads and grounding pads may also be provided.

In this embodiment, the front cover 1 includes a plastic part 11 and a reinforcing rigid body 13 that is injection-molded and fixed to the plastic part 11 , the support wall 1B is located on the plastic part 11 , and the soldering piece 9 is injection-molded and fixed to the plastic part 11 . The plastic part 11 . That is to say, at least a part of the plastic part 11 is located on the bottom wall 1A so that the main body part 91 and the first electrical connection part 93 can be injection-molded and fixed on the bottom wall 1A, the plastic part 11 at least Another part constitutes the boss 1D so that the extension part 95 and the second electrical connection part 97 can be injection-molded and fixed to the boss 1D. In the case that the speaker box has the same volume, by arranging the front cover 1 to include a plastic part 11 and a reinforcing rigid body 13 fixed to the plastic part 11 by injection molding, it is beneficial to reduce the wall thickness of the front cover 1, Thereby, it is beneficial to increase the powder filling space of the speaker box.

Wherein, the sound guiding channel 10C is formed on the plastic part 11 .

The reinforcing rigid body 13 includes a main body 131 and a plurality of surrounding walls 133 extending from the main body 131 into the plastic part 11 . The surrounding walls 133 enclose a conical through hole 135 , and the conical through hole 135 is filled with the plastic of said plastic part 11 .

The tapered through hole 135 includes a first opening 137 and a second opening 138, the first opening 137 and the second opening 138 are respectively provided at both ends of the tapered through hole 135, and the second opening 138 is closer to the accommodating cavity 10 than the first opening 137 , and the size of the tapered through hole 135 gradually decreases along the direction from the first opening 137 to the second opening 138 . The size of the tapered through hole 135 is set to gradually decrease in the direction from the first opening 137 to the second opening 138 , so that the reinforcing rigid body 13 has a higher height after being injection-molded and fixed to the plastic part 11 . connection strength.

In this embodiment, the reinforcing rigid body 13 is made of metal material, and the surrounding wall 133 is stamped and formed by the body 131 . The reinforcing rigid body 13 made of metal material is not only conducive to strengthening the strength of the front cover 1, but also conducive to heat dissipation of the speaker box. Normally, the reinforcing rigid body 13 is made of steel material.

It can be understood that, in other embodiments, the composition of the front cover 1 is not limited to this, for example, the front cover 1 can also be configured to be made of plastic only.

The air-permeable isolation cover 4 is fixed on the support wall 1B and covers the sound-generating unit 3, so that the sound-generating unit 3 is separated from the back cavity 10B, so that the back cavity 10B can be filled Install sound-absorbing powder or particles to improve the acoustic performance of the speaker cabinet.

In this embodiment, the front cover 1 and the rear cover 2 are provided with a powder filling hole 20 at the position facing the rear cavity 10B, and the powder filling hole 20 is covered with a sealing cover 30 .

It can be understood that, in other embodiments, the front cover 1 or the rear cover 2 may also be provided with a powder filling hole 20 at the position facing the rear cavity 10B, and the powder filling hole 20 is covered with a powder filling hole 20 . Seal cover 30 .

The breathable isolation cover 4 includes a cover body 41 attached to the magnetic circuit system 7 , an adhesive portion 43 fixed on the support wall 1B, and a collapsed portion 45 connecting the cover body 41 and the adhesive portion 43 . , wherein the cover body 41 is closer to the back cover 2 than the collapsed portion 45 , the orthographic projection of the elastic arm 815 on the breathable isolation cover 4 is located within the range of the collapsed portion 45 , and When the flexible circuit board 81 vibrates, the elastic arm 815 does not collide with the collapsed portion 45 . Generally speaking, when the flexible circuit board 81 vibrates to a maximum position away from the vibrating film 61 , the closer the distance between the elastic arm 815 and the collapsed portion 45 is, the more favorable it is for the flexible circuit board 81 to vibrate and overflow. The outer space maximizes the powder filling area (that is, when the electrical signal input by the voice coil 63 is under normal working conditions, when the flexible circuit board 81 vibrates to the maximum position away from the diaphragm 61, the elastic arm 815 and the The collapsed portion 45 is the limit position when it contacts but does not collide). However, in order to prevent the elastic arm 815 from colliding with the collapsed portion 45 due to the abnormal electrical signal input from the voice coil 63, when the electrical signal input from the voice coil 63 is under normal working conditions, the flexible circuit board 81 vibrates to a distance away from When the diaphragm 61 is at the maximum position, the elastic arm 815 and the collapsed portion 45 are generally set to have a certain distance. As shown in FIG. 13 , the dotted line a in the figure is the maximum position where the flexible circuit board 81 vibrates away from the diaphragm 61 when the electrical signal input by the voice coil 63 belongs to the normal working condition.

In this embodiment, the elastic arm 815 includes a non-deformable region 81A extending from the holding portion 811 toward the magnetic circuit system 7 and a deformable region connecting the non-deformable region 81A and the joint portion 813 81B, the deformation zone 81B is spaced apart from the holding portion 811 , the collapsed portion 45 protrudes toward the bottom wall 1A to form a convex hull 47 , and the non-deformation zone 81A is on the breathable isolation cover 4 The orthographic projection of is located within the range of the convex hull 47 , and the contour of the orthographic projection of the deformation zone 81B on the air-permeable isolation cover 4 is spaced from the convex hull 47 .

In this embodiment, the non-deformable area 81A is attached to the convex hull 47 .

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

Claims

A speaker box, comprising a front cover, a rear cover assembled with the front cover to form an accommodating cavity, a sounding unit and a ventilating isolation cover arranged in the accommodating cavity, the sounding monomer separating the accommodating cavity It is a front cavity and a rear cavity. The front cover has a bottom wall and a supporting wall extending from the bottom wall and surrounding the sounding unit. The cover separates the sound-generating unit from the rear cavity, and the sound-generating unit includes a basin frame, a vibration system and a magnetic circuit system respectively fixed on the basin frame, and an elastic support member, and the elastic support member includes a flexible A circuit board, the flexible circuit board includes a holding part connected to the basin frame, a joint part connected to the vibration system, and an elastic arm connecting the holding part and the joint part, characterized in that the ventilation The isolation cover includes a cover body attached to the magnetic circuit system, a glued part fixed on the support wall, and a collapsed part connecting the cover body and the glued part, wherein the cover body is opposite to the The collapsed part is closer to the back cover, the orthographic projection of the elastic arm on the air-permeable isolation cover is within the range of the collapsed part, and when the flexible circuit board vibrates, the elastic arm does not interact with the collapsed part Department collision.
The loudspeaker box according to claim 1, wherein the elastic arm comprises a non-deformable area extending from the holding portion toward the magnetic circuit system, and a non-deformable area connecting the non-deformable area and the joint portion. Deformation zone, the deformation zone and the holding part are arranged at intervals, the collapsed part protrudes toward the bottom wall to form a convex hull, and the orthographic projection of the non-deformation zone on the air-permeable isolation cover is located in the within the range of the convex hull, and the contour of the orthographic projection of the deformation zone on the air-permeable isolation cover is spaced from the convex hull.
The loudspeaker box according to claim 2, wherein the non-deformable area is attached to the convex hull.
The speaker box according to claim 1, wherein the vibration system comprises a vibrating membrane fixed on the basin frame and enclosed with the bottom wall to form the front cavity, and a vibrating membrane that drives the vibrating membrane to vibrate and emit sound. A voice coil, a skeleton is connected to the side of the diaphragm facing the voice coil, and the skeleton includes a skeleton body fixed on the diaphragm, extending from the outer periphery of the skeleton body in a direction away from the diaphragm The first connecting part of the skeleton body and the second connecting part extending from the inner peripheral edge of the frame body to the direction away from the diaphragm, the connecting part is connected with the first connecting part, and the voice coil is connected with the the second connecting part.
The speaker box according to claim 4, wherein the elastic support member further comprises an auxiliary diaphragm, and the auxiliary diaphragm includes a first fixing portion fixed to the basin frame and fixed to the first connection The second fixing part of the first fixing part and the folded ring part connecting the first fixing part and the second fixing part, the holding part is fixed on the side of the first fixing part away from the basin frame, and the combination The hinge part is fixed on the side of the second fixing part away from the first connecting part, the folded ring part protrudes in the direction away from the flexible circuit board, and the elastic arm is on the auxiliary diaphragm. The orthographic projection is located within the range of the ring portion.
The speaker box according to claim 1, wherein the holding portion extends along a direction parallel to the bottom wall to form a pad extending into the rear cavity, and the support wall is provided with a shelter The front cover also has a boss extending from the bottom wall to the rear cavity, the speaker box further includes a soldering piece, and the soldering piece is fixed on the bottom wall by injection molding. The main body part, the first electrical connection part that extends from the main body part to the outside of the receiving cavity and is injection-molded and fixed to the bottom wall, the extension that is bent and extended from the main body part and is injection-molded into the boss and a second electrical connecting portion formed by bending and extending from the extending portion and being fixed on the boss by injection molding, wherein the first electrical connecting portion is electrically connected to an external circuit, and the second electrical connecting portion is The boss is exposed on a side away from the bottom wall, and the pad is arranged on the second electrical connection part and is electrically connected with the second electrical connection part.
The speaker box according to claim 6, wherein the front cover comprises a plastic part and a reinforced rigid body fixed by injection molding on the plastic part, the support wall is located on the plastic part, and the welding piece is fixed by injection molding on the plastic parts.
The speaker box according to claim 7, wherein the reinforcing rigid body comprises a main body and a plurality of surrounding walls extending from the main body into the plastic part, the surrounding walls enclosing a conical through hole , the conical through hole is filled with the plastic of the plastic part, the conical through hole includes a first opening and a second opening, and the first opening and the second opening are respectively provided in the conical through hole At both ends of the hole, the second opening is closer to the accommodating cavity than the first opening, and the size of the tapered through hole gradually decreases along the direction from the first opening to the second opening.
The speaker box according to claim 8, wherein the reinforcing rigid body is made of metal material, and the surrounding wall is stamped and formed from the body.
The loudspeaker box according to claim 1, wherein a powder filling hole is opened on the front cover or/and the rear cover at a position facing the rear cavity, and the powder filling hole is covered with a sealing cover .