CN212628260U - Loudspeaker box - Google Patents

Abstract

The utility model provides a loudspeaker box, which comprises a lower cover, an upper cover, a sounding monomer and a ventilating separator, wherein the upper cover is covered on the lower cover and jointly forms an accommodating space; the upper cover comprises an upper cover body, a first supporting wall and a second supporting wall, the first supporting wall and the second supporting wall respectively extend from the upper cover body to the lower cover in a protruding mode, the sound generating unit comprises a magnetic circuit system, and the sound generating unit is fixed on the first supporting wall; the second support wall surrounds the first support wall and is at least partially spaced from the first support wall; the breathable isolating piece comprises a main body part and an extension wall, wherein the main body part is arranged on the sounding single body in a covering mode and is spaced from the lower cover, the extension wall is bent and extends towards the upper cover body from the periphery of the main body part, the extension wall is fixed on the second support wall and is sealed with the second support wall, the main body part is provided with a through hole, the magnetic circuit system is exposed through the through hole, and the main body part is pressed on the magnetic circuit system and is sealed with the magnetic circuit system. Compared with the prior art, the utility model discloses a speaker box low frequency acoustic performance is excellent, and assembly efficiency is high.

Description

Loudspeaker box

[ technical field ] A method for producing a semiconductor device

The utility model relates to an electroacoustic conversion equipment technical field especially relates to a loudspeaker box.

[ background of the invention ]

With the advent of the mobile internet age, the number of smart mobile devices is increasing. Among the mobile devices, the mobile phone is undoubtedly the most common and portable mobile terminal device. At present, the functions of a mobile phone are very diverse, one of which is a high-quality music function, and thus, a speaker box for playing sound is widely applied to the current smart mobile devices.

The loudspeaker box in the related art comprises an upper cover, a lower cover, a sounding single body, an annular bracket and a ventilating partition, wherein the lower cover and the upper cover are assembled to form an accommodating space; the support is fixed the upper cover and encircles the setting of sound production monomer, the periphery of ventilative separator is fixed in the support, sound production monomer and ventilative isolating component will jointly accommodating space separates for front chamber and back chamber to but realize the interior full filling structure of back chamber.

However, in the speaker box of the related art, the bracket and the upper cover are assembled and glued first, and then the air-permeable partition is assembled and glued to the bracket, so as to realize the above-mentioned full-filling sound-generating single body isolation scheme. The structure has more assembling and gluing steps, and the assembling and production efficiency is seriously influenced.

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

[ Utility model ] content

An object of the utility model is to provide a speaker box that low frequency acoustic performance is excellent and assembly efficiency is high.

In order to achieve the above object, the present invention provides a speaker box, which comprises a lower cover, an upper cover covering the lower cover and enclosing an accommodating space, a sounding unit and a ventilating partition accommodated in the accommodating space; the upper cover comprises an upper cover body covered on the lower cover and a first supporting wall protruding and extending from the upper cover body to the lower cover direction, the sounding unit comprises a magnetic circuit system, and the sounding unit is supported and fixed on the first supporting wall; the breathable isolating piece comprises a main body part and an extension wall, wherein the main body part is covered on the sounding single body and is arranged at an interval with the lower cover, the extension wall is bent and extended from the periphery of the main body part to the upper cover body, the extension wall is fixed on the second supporting wall and is sealed with the second supporting wall, the main body part is provided with a through hole penetrating through the main body part, part of the magnetic circuit system passes through the through hole to be exposed, and the main body part is pressed on the magnetic circuit system and is sealed with the magnetic circuit system.

Preferably, the second supporting wall comprises two oppositely arranged first side walls and two second side walls which are oppositely arranged at intervals and are connected with the two first side walls, and at least one of the first side walls is oppositely arranged at intervals with the first supporting wall.

Preferably, one of the two first side walls is arranged opposite to the first supporting wall at a spacing, and the other side wall abuts against the first supporting wall; the two second side walls are respectively abutted against the first supporting wall.

Preferably, the upper cover further includes a support pillar protruding and extending from the upper cover body toward the lower cover, the support pillar is located between the first side wall and the first support wall, and the main body portion is supported by the support pillar.

Preferably, the extension wall includes a first extension wall extending from the periphery of the main body to the upper cover body in a bending manner, and a second extension wall extending from the first extension wall to a position away from the sounding unit in a bending manner, and the second extension wall is fixed to the second support wall.

Preferably, the extension wall further includes a third extension wall extending from the second extension wall to the upper cover body in a bending manner, and the third extension wall abuts against the side surface of the second support wall.

Preferably, the second extending wall and the second supporting wall are sealed by gluing.

Preferably, the magnetic circuit system comprises a magnetic yoke fixed on the sounding single body and far away from the upper cover body, the magnetic yoke is sunken to form a glue containing groove for containing glue, the main body part extends into the glue containing groove and is glued and sealed with the magnetic yoke, and the magnetic yoke is partially exposed through the through hole.

Preferably, the breathable isolating piece is positioned between the sound-producing single body and the lower cover, and the breathable isolating piece and the sound-producing single body jointly divide the accommodating space into a front cavity and a rear cavity; the rear cavity is filled with sound-absorbing particles, and the sound-absorbing particles are packaged in the rear cavity by the breathable partition piece.

Preferably, the speaker box further comprises a circuit board, one end of the circuit board is fixedly and electrically connected with the sound generating unit, and the other end of the circuit board extends out of the accommodating space through the rear cavity; the second supports the wall and is equipped with by its one end that is close to the main part is to keeping away from the sunken groove of stepping down that forms of lower cover direction, the circuit board joint in the groove of stepping down and warp the groove of stepping down extends.

Preferably, the circuit board comprises a first section fixed between the extension wall and the second support wall in a clamping manner, a second section extending from two opposite ends of the first section to the sounding monomer and electrically connected with the sounding monomer, and a third section bent from the first section to a position far away from the sounding monomer; the first section is clamped in the abdicating groove, and the third section penetrates through the upper cover and extends out of the accommodating space.

Compared with the prior art, the loudspeaker box of the utility model has the advantages that the sound production single body is supported and fixed on the first supporting wall, the breathable isolating piece comprises the main body part which is arranged on the sound production single body in a covering way and is separated from the lower cover and the extending wall which is bent and extended from the periphery of the main body part to the upper cover body, the extending wall is arranged around the periphery of the sound production single body, the extending wall is fixed on the second supporting wall and is sealed with the second supporting wall, so that the breathable isolating piece and the sound production single body can jointly separate the accommodating space into the front cavity and the rear cavity, the structure is that the rear cavity far away from one side of the sound production single body can be completely filled with sound absorption particles as a virtual sound cavity, so as to improve the filling efficiency of the sound absorption particles of the rear cavity and effectively improve the low-frequency acoustic performance, meanwhile, through the arrangement of the second supporting wall, the process of gluing and fixing the, the breathable isolating piece is directly fixed on the second supporting wall in a sealing manner, so that the production efficiency is effectively improved; in addition, through setting up the through-hole at ventilative isolator, the magnetic circuit part can realize exposing through the through-hole for sound production monomer is fixed with ventilative isolator after, can not lead to the increase of inner structure's overall height because of the stack of structure, is favorable to the miniaturization of speaker box.

[ 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 a schematic perspective view of a speaker box according to the present invention;

fig. 2 is an exploded schematic view of a part of the three-dimensional structure of the speaker box of the present invention;

fig. 3 is a schematic perspective view of the upper cover of the present invention;

FIG. 4 is a sectional view taken along line A-A of FIG. 1;

FIG. 5 is a partial enlarged view of the portion indicated by B in FIG. 4;

figure 6 is a schematic partial cross-sectional view of a derivative embodiment of the loudspeaker enclosure of the present invention;

fig. 7 is a schematic structural view of another embodiment of the arrangement of the powder filling hole in the speaker box according to the present invention;

fig. 8 is a schematic structural diagram of another embodiment of the arrangement of the powder filling hole in the speaker box according to 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.

Referring to fig. 1-5, the present invention provides a speaker box 100, which includes a lower cover 1, an upper cover 2, a sound generating unit 3 and a ventilation spacer 4. The lower cover 1 is arranged on the upper cover 2 and jointly forms an accommodating space 10.

Specifically, the upper cover 2 includes an upper cover body 21 covering the lower cover 1, a first support wall 22 and a second support wall 23 in a ring shape and protruding from the upper cover body 21 in the direction of the lower cover 1, and a sound guide passage 24 formed in the upper cover body 21, the second support wall 23 is disposed around the outer peripheral side of the first support wall 22, and at least a portion of the second support wall 23 and the first support wall 22 are disposed at an interval.

It should be noted that the specific structural form of the second supporting wall 23 is not limited, for example, in the present embodiment, taking the second supporting wall 23 as a rectangle as an example for expansion, the second supporting wall 23 includes two oppositely disposed first side walls 231 and two oppositely disposed second side walls 232, the two first side walls 231 are respectively located on both sides of the short axis of the second supporting wall 23, and the two second side walls 232 are respectively located on both sides of the long axis of the second supporting wall 23; each second side wall 232 is connected with two first side walls 231, and at least one first side wall 231 is arranged opposite to the first support wall 22 at intervals; of course, it is also possible for the second supporting wall to be circular.

Further, one of the two first side walls 231 is located on a side of the upper cover 2 away from the first support wall 22 and is disposed opposite to the first support wall 22 at a distance, and the other is located on a side of the upper cover 2 close to the first support wall 22 and abuts against the first support wall 22; the two second side walls 232 abut against the first supporting wall 22 respectively; of course, in other embodiments it is also possible that the second support wall is completely spaced from the first support wall, i.e. both the first side walls and both the second side walls are spaced from the first support wall.

The sounding single body 3 is accommodated in the accommodating space 10 and supported on the upper cover 2. The sounding unit 3 comprises a basin frame 31, and a vibration system 32 and a magnetic circuit system 33 which are respectively fixed on two opposite sides of the basin frame 31, wherein the magnetic circuit system 33 is used for providing driving force to drive the vibration system 32 to vibrate and sound; the magnetic circuit system 33 includes a yoke 331 fixed to a side of the frame 31 remote from the upper cover body 21.

The sounding single body 3 is supported and fixed on the first supporting wall 22 through the basin frame 31. In this embodiment, the periphery of the frame 31 is fixed to the first support wall 22 by gluing.

The breathable partition piece 4 is accommodated in the accommodating space 10 and is positioned between the sounding single body 3 and the lower cover 1, and the accommodating space 10 is divided into a front cavity 101 and a rear cavity 102 by the breathable partition piece 4 and the sounding single body 3.

The front cavity 101 is used for sound production, and the sound guide channel 24 forms the front cavity 101 into a side sound production structure. The rear cavity 102 is filled with sound-absorbing particles 5, and the air-permeable partition 4 encapsulates the sound-absorbing particles 5 in the rear cavity 102 to form a DBASS virtual sound cavity for further improving low-frequency acoustic performance.

The vibration system 32 and the upper cover body 21 form a front sound cavity 6 at intervals, and the sound guide channel 24 communicates the front sound cavity 6 with the outside and jointly forms the front cavity 101 for forming a side sound production structure. The sound generating unit 3, the air permeable partition 4, the upper cover 2 and the lower cover 1 jointly enclose the rear cavity 102 for improving low-frequency acoustic performance.

Specifically, the ventilation spacer 4 includes a main body portion 41 that covers the sound generating unit 3 and is spaced apart from the lower cover 1, and an extension wall 42 that is bent and extended from a peripheral edge of the main body portion 41 toward the upper cover body 21, where the extension wall 42 is disposed around a peripheral side of the sound generating unit 3, the extension wall 42 is fixedly supported on the second support wall 23 and sealed with the second support wall 23, a part of the main body portion 41 is pressed against a yoke 331 of the magnetic circuit system 33 and sealed with the magnetic circuit system 33, and another part is spaced apart from the sound generating unit 3; the ventilating isolation piece 4, the sounding single body 3 and the upper cover 2 jointly enclose an inner sound cavity 103.

Through one of them first lateral wall 231 with first support wall 22 separates the setting each other, makes second support wall 23 with certain interstitial space has been reserved between the first support wall 22, thereby guarantees to form interior sound cavity 103 has enough big cavity volume, more is favorable to improving speaker box 100's low frequency acoustic performance, simultaneously, interior sound cavity 103 with through between the back chamber 102 extend the wall 42 with the main part 41 with the part of sound production monomer 3 interval realizes the air intercommunication, guarantees interior sound cavity 103 with the smoothness of the air intercommunication between the back chamber 102, improves interior sound cavity 103 to the gas compliance that back chamber 102 was revealed, further improves low frequency acoustic performance.

Here, ventilative separator 4 forms spatial structure, ventilative separator 4 with yoke 331 will jointly interior sound chamber 103 with back cavity 102 is separated, prevents to inhale sound granule 5 and follows back cavity 102 gets into interior sound chamber 103, and then get into the inside sound production performance that influences of sound production monomer 3, the effectual sound production reliability that has improved speaker box 100.

In the structure, the rear cavity 102 of the ventilating partition 4 far away from one side of the sounding monomer 3 can be completely filled with the sound absorption particles 5 to serve as a D-BASS virtual sound cavity, so that the filling efficiency of the sound absorption particles 5 of the rear cavity 102 is greatly improved, and the low-frequency acoustic performance of the loudspeaker box 100 is effectively improved. Meanwhile, through the arrangement of the second supporting wall 23, the process of gluing and fixing a bracket for supporting the breathable partition in the related art is omitted, and the breathable partition 4 is directly fixed on the second supporting wall 23 in a sealing manner, so that the assembly process is simplified, and the production efficiency is effectively improved; in addition, by providing the through hole 40 on the main body 41 of the air-permeable partition 4, the yoke 331 of the magnetic circuit system 33 can be exposed to the interior sound cavity 103 through the through hole 40, so that after the sound-emitting unit 3 and the air-permeable partition 4 are fixed, the overall height of the internal structure is not increased due to the superposition of the structures, the space utilization rate of the interior is effectively improved, and the miniaturization design of the speaker box 100 is facilitated.

Preferably, in order to prevent the air-permeable partition 4 from being extruded and deformed by the sound-absorbing particles 5 during the powder filling process of the rear cavity 102, in this embodiment, the upper cover 2 further includes a supporting wall 25 protruding from the upper cover body 21 toward the lower cover 1, the supporting column 25 is located between the first side wall 231 spaced apart from the first supporting wall 22 and the first supporting wall 22, and the main body portion 41 is supported by the supporting column 25. Certainly, the number of the supporting pillars 25 and the positional relationship thereof are not limited, for example, in the present embodiment, the ventilating partition 4 is illustrated as a rectangle, the supporting pillars 25 include two supporting pillars 25, and the two supporting pillars 25 are respectively disposed at two adjacent corners of the first side wall 231 spaced from the first supporting wall 22, so as to provide a fixed support for the ventilating partition 4, effectively improve the overall compressive strength of the ventilating partition 4, effectively prevent the ventilating partition 4 from being crushed in the powder filling process, effectively improve the assembly reliability of the ventilating partition 4, and further provide the reliability of the speaker box 100.

Further, the extension wall 42 is a structure that is continuously bent and extended, and includes a first extension wall 421 that is bent and extended from the periphery of the main body 41 to the upper cover body 21, and a second extension wall 422 that is bent and extended from the first extension wall 421 to a position away from the sound-generating unit 3, and more specifically, in this embodiment, the second extension wall 422 is fixed to the second support wall 23, the extension wall 42 forms a seal with the second support wall 23 through the second extension wall 422, and the second extension wall 422 is a flanging structure, so that a connection area between the second support wall 23 and the extension wall 42 can be effectively increased, and reliability of sealing and fixing of the two can be ensured.

It should be noted that the sealing manner between the second extending wall 422 and the second supporting wall 23 is not limited, for example, in the present embodiment, the sealing between the second extending wall 422 and the second supporting wall 23 is performed by gluing; in order to ensure the gluing area between the second extending wall 422 and the second supporting wall 23, the thickness of the glue applied between the second extending wall 422 and the second supporting wall 23 needs to be ensured, the second extending wall 422 needs to have a certain width, the second supporting wall 23 needs to have a certain wall thickness, and the glue can be set according to practical situations, here, a preferable scheme is mentioned, the thickness of the second supporting wall 23 is 0.60mm, and the glue can be applied between the second extending wall 422 and the second supporting wall 23 for 0.60mm, so as to ensure the reliability of the gluing and sealing between the second extending wall 422 and the second supporting wall 23.

Furthermore, as a more preferred embodiment, as shown in fig. 6, the extending wall 42a of the air-permeable partition 4a further includes a third extending wall 423a extending from the second extending wall 422a to the upper cover body 21a in a bending manner, and the third extending wall 423a abuts against the side surface of the second supporting wall 23a, this arrangement further increases the connecting area between the air-permeable partition 4a and the second supporting wall 23a, so that the reliability of sealing and fixing between the two walls is higher.

As shown in fig. 1 to 5, preferably, in order to further improve the reliability of the fixing between the air-permeable partition 4 and the yoke 331, the yoke 331 is recessed to form a glue receiving groove 3310 for receiving glue, the body portion 41 extends into the glue receiving groove 3310 and presses against the yoke 331, and the glue between the body portion 41 and the yoke 331 is sealed by applying glue in the glue receiving groove 3310.

The loudspeaker box 100 further comprises a circuit board 7, one end of the circuit board 7 is fixedly and electrically connected with the sound generating unit 3, and the other end of the circuit board 7 extends out of the accommodating space 10 through the rear cavity 102 to introduce an external electric signal into the sound generating unit 3; the second supporting wall 23 is provided with a yielding groove 230 formed by recessing the end of the second supporting wall close to the main body portion 41 away from the lower cover 1, and the circuit board 7 is clamped in the yielding groove 230 and extends out of the accommodating space 10 through the yielding groove 230.

Specifically, the circuit board 7 includes a first section 71 sandwiched and fixed between the extension wall 42 and the second support wall 23 and the sound generating unit 3, a second section 72 extending from two opposite ends of the first section 71 to the sound generating unit 3 and electrically connected to the sound generating unit 3, and a third section 73 bent from the first section 71 to a position away from the sound generating unit 3; the first section 71 is clamped in the receding groove 230, and the third section 73 penetrates through the upper cover 2 and extends to the outside of the accommodating space 10 for connecting an external electrical signal.

In this embodiment, the upper cover 2 is further provided with a supporting wall 26 protruding from the outer side thereof, and the third section 73 is attached to the supporting wall 26, so as to support the third section 73 and facilitate connection with an external electrical signal source.

Preferably, a positioning column 261 is arranged on one side of the supporting wall 26 close to the third section 73, the third section 73 is provided with a positioning hole 731 penetrating through the third section, and the positioning column 261 is inserted into the positioning hole 731 to position the third section 73, so that on one hand, the assembly efficiency is improved, on the other hand, the third section 73 is prevented from moving, and the stability of signal connection with an external power supply is improved.

The loudspeaker box 100 is further provided with a powder filling hole 9 and a sealing cover 91 covering the powder filling hole 9, wherein the powder filling hole 9 is communicated with the rear cavity 102 and is used for filling the sound absorption particles 5 into the rear cavity 102.

As shown in fig. 2, the powder filling holes 9 include at least two holes, and are respectively disposed on the upper cover 2 and the lower cover 1.

Of course, the arrangement of the powder filling hole 9 is not limited to the above manner, and may also be separately arranged:

as shown in fig. 7, the powder filling hole 409 is disposed through the upper cover 402, and the sealing cover 491 is disposed on the powder filling hole 409.

As shown in fig. 8, in the speaker box 500, the powder filling hole 509 is disposed through the lower cover 501, and the sealing cover 591 is disposed over the powder filling hole 509.

Compared with the prior art, the loudspeaker box of the utility model has the advantages that the sound production single body is supported and fixed on the first supporting wall, the breathable isolating piece comprises the main body part which is arranged on the sound production single body in a covering way and is separated from the lower cover and the extending wall which is bent and extended from the periphery of the main body part to the upper cover body, the extending wall is arranged around the periphery of the sound production single body, the extending wall is fixed on the second supporting wall and is sealed with the second supporting wall, so that the breathable isolating piece and the sound production single body can jointly separate the accommodating space into the front cavity and the rear cavity, the structure is that the rear cavity far away from one side of the sound production single body can be completely filled with sound absorption particles as a virtual sound cavity, so as to improve the filling efficiency of the sound absorption particles of the rear cavity and effectively improve the low-frequency acoustic performance, meanwhile, through the arrangement of the second supporting wall, the process of gluing and fixing the, the breathable isolating piece is directly fixed on the second supporting wall in a sealing manner, so that the production efficiency is effectively improved; in addition, through setting up the through-hole at ventilative isolator, the magnetic circuit part can realize exposing through the through-hole for sound production monomer is fixed with ventilative isolator after, can not lead to the increase of inner structure's overall height because of the stack of structure, is favorable to the miniaturization of speaker box.

The above only is the embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structures or equivalent processes of the present invention are used in the specification and the attached drawings, or directly or indirectly applied to other related technical fields, and the same principle is included in the protection scope of the present invention.

Claims (11)

1. A loudspeaker box comprises a lower cover, an upper cover, a sound production single body and a ventilation isolating piece, wherein the upper cover is covered on the lower cover and jointly forms an accommodating space; the upper cover comprises an upper cover body covered on the lower cover and a first supporting wall protruding and extending from the upper cover body to the lower cover direction, the sounding unit comprises a magnetic circuit system, and the sounding unit is supported and fixed on the first supporting wall; the breathable isolating piece comprises a main body part and an extension wall, wherein the main body part is covered on the sounding single body and is arranged at an interval with the lower cover, the extension wall is bent and extended from the periphery of the main body part to the upper cover body, the extension wall is fixed on the second supporting wall and is sealed with the second supporting wall, the main body part is provided with a through hole penetrating through the main body part, part of the magnetic circuit system passes through the through hole to be exposed, and the main body part is pressed on the magnetic circuit system and is sealed with the magnetic circuit system.

2. A loudspeaker enclosure according to claim 1, wherein the second support wall comprises two oppositely disposed first side walls and two oppositely spaced apart second side walls connecting the two first side walls, at least one of the first side walls being oppositely spaced apart from the first support wall.

3. A loudspeaker enclosure according to claim 2, wherein one of the two first side walls is spaced opposite the first support wall and the other of the two first side walls abuts the first support wall; the two second side walls are respectively abutted against the first supporting wall.

4. A loudspeaker enclosure according to claim 3, wherein the upper cover further comprises a support post extending convexly from the upper cover body towards the lower cover, the support post being located between the first side wall spaced from the first support wall and the first support wall, the main body portion being supported by the support post.

5. The speaker box according to claim 1, wherein the extension wall includes a first extension wall extending from a periphery of the main body portion to the upper cover body, and a second extension wall extending from the first extension wall to a position away from the sound-generating unit, and the second extension wall is fixed to the second support wall.

6. The speaker box of claim 5, wherein the extension wall further comprises a third extension wall extending from the second extension wall to be bent toward the upper cover body, the third extension wall being in abutment with the second support wall side.

7. A loudspeaker enclosure according to claim 5, wherein the second extension wall is sealed to the second support wall by adhesive.

8. The speaker box as claimed in claim 1, wherein the magnetic circuit system includes a magnetic yoke fixed to the sound generating unit away from the upper cover body, the magnetic yoke is recessed to form a glue containing groove for containing glue, the main body extends into the glue containing groove and is sealed with the magnetic yoke by gluing, and the magnetic yoke is partially exposed through the through hole.

9. The loudspeaker box according to claim 1, wherein the air-permeable partition is located between the sound-generating unit and the lower cover, and the air-permeable partition and the sound-generating unit jointly divide the accommodating space into a front cavity and a rear cavity; the rear cavity is filled with sound-absorbing particles, and the sound-absorbing particles are packaged in the rear cavity by the breathable partition piece.

10. The speaker box according to claim 9, further comprising a circuit board, wherein one end of the circuit board is electrically connected to the sound generating unit, and the other end of the circuit board extends out of the accommodating space through the rear cavity; the second supports the wall and is equipped with by its one end that is close to the main part is to keeping away from the sunken groove of stepping down that forms of lower cover direction, the circuit board joint in the groove of stepping down and warp the groove of stepping down extends.

11. The speaker box according to claim 10, wherein the circuit board includes a first section fixed between the extension wall and the second support wall, a second section extending from opposite ends of the first section to the sound generating unit and electrically connected to the sound generating unit, and a third section bent from the first section to a position away from the sound generating unit; the first section is clamped in the abdicating groove, and the third section penetrates through the upper cover and extends out of the accommodating space.

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