CN114125602A

CN114125602A - Sound box

Info

Publication number: CN114125602A
Application number: CN202111297659.4A
Authority: CN
Inventors: 李震
Original assignee: Goertek Techology Co Ltd
Current assignee: Goertek Techology Co Ltd
Priority date: 2021-11-04
Filing date: 2021-11-04
Publication date: 2022-03-01
Anticipated expiration: 2041-11-04
Also published as: CN114125602B

Abstract

The invention provides a sound box, which comprises a shell, a loudspeaker, a moving part and a magnetic component, wherein an accommodating cavity is formed in the shell, and the shell is provided with a sound outlet communicated with the accommodating cavity; the loudspeaker is accommodated in the accommodating cavity and plugs the sound outlet; the moving piece is transversely separated from the accommodating cavity to divide the accommodating cavity into a rear cavity and a buffer cavity, the pressure relief hole of the loudspeaker is communicated with the rear cavity, and the moving piece can reciprocate in the accommodating cavity to change the volumes of the rear cavity and the buffer cavity; the magnetic assembly comprises a first magnetic piece and a second magnetic piece, the first magnetic piece is arranged on the moving piece, and the second magnetic piece is arranged on the shell and matched with the first magnetic piece to block the moving piece from vibrating to one side of the buffer cavity. The technical scheme of this application can improve the electroacoustic conversion efficiency and the sensitivity of audio amplifier.

Description

Sound box

Technical Field

The invention relates to the technical field of sound boxes, in particular to a sound box.

Background

In the existing closed type sound box, the speaker is disposed at the sound outlet of the housing to radiate sound outward, and the space inside the housing forms the rear cavity of the speaker. Because the back chamber of closed audio amplifier is sealed completely, just can make the volume of back chamber produce the change when the speaker vibrating diaphragm vibration sound production, lead to the pressure change in the back chamber, appear hindering the phenomenon of vibrating diaphragm vibration to influence the electro-acoustic conversion efficiency of speaker, lead to the sensitivity of closed audio amplifier lower.

Disclosure of Invention

The invention mainly aims to provide a sound box, aiming at improving the electroacoustic conversion efficiency and the sensitivity of the sound box.

In order to achieve the above object, the present invention provides a sound box, including:

the sound-emitting device comprises a shell, a sound-emitting component and a sound-absorbing component, wherein an accommodating cavity is formed in the shell, and the shell is provided with a sound outlet communicated with the accommodating cavity;

the loudspeaker is accommodated in the accommodating cavity and seals the sound outlet;

the moving piece is transversely separated from the accommodating cavity to divide the accommodating cavity into a rear cavity and a buffer cavity, a pressure relief hole of the loudspeaker is communicated with the rear cavity, and the moving piece can reciprocate in the accommodating cavity to change the volumes of the rear cavity and the buffer cavity; and

the magnetic component comprises a first magnetic piece and a second magnetic piece, the first magnetic piece is arranged on the moving piece, the second magnetic piece is arranged on the shell and matched with the first magnetic piece to block the moving piece from vibrating on one side of the buffer cavity.

In an embodiment of the sound box of the present invention, the second magnetic element is disposed in the buffer cavity, the second magnetic element and the first magnetic element are disposed opposite to each other along a vibration direction of the movable element, and magnetic poles of the second magnetic element and the first magnetic element disposed opposite to each other have the same magnetism.

In an embodiment of the sound box of the present invention, the first magnetic element is disposed on a side surface of the movable element facing the buffer cavity, and is spaced from the second magnetic element.

In an embodiment of the sound box of the present invention, the sound box further includes sound-absorbing cotton, the sound-absorbing cotton is laid on the bottom wall of the buffer cavity, and the second magnetic member is circumferentially disposed along the sound-absorbing cotton.

In an embodiment of the sound box of the present invention, the second magnetic member is disposed at an interval from the sound-absorbing cotton along a vibration direction of the movable member.

In an embodiment of the sound box, the bottom wall of the buffer cavity is convexly provided with a plurality of limiting steps, the limiting steps are arranged at intervals along the circumferential direction of the sound-absorbing cotton, and the second magnetic part is supported on the limiting steps.

In an embodiment of the sound box of the present invention, the movable member is a rigid member, and the movable member is slidably disposed in the accommodating cavity.

In an embodiment of the sound box of the present invention, the first magnetic element is disposed around the movable element in a circumferential direction of the movable element.

In an embodiment of the sound box of the present invention, a limit step is convexly disposed on a bottom wall of the buffer cavity, and the second magnetic member is supported on the limit step;

the top of the limiting step is convexly provided with a guide post, and the guide post extends towards the moving part and penetrates through the moving part and the first magnetic part.

In an embodiment of the sound box of the present invention, the housing includes an upper shell and a lower shell, the upper shell and the lower shell cover each other to enclose the accommodating cavity, the upper shell is provided with the sound outlet, the speaker is disposed in the upper shell, and the moving member and the magnetic element are both disposed in the lower shell.

According to the technical scheme, the loudspeaker is arranged at the sound outlet of the shell to radiate sound outwards, and the moving piece is arranged in the shell of the sound box to divide the containing cavity in the shell into the rear cavity and the buffer cavity, so that the pressure relief hole of the loudspeaker is communicated with the rear cavity, and meanwhile, the moving piece can move in the containing cavity. So set up, when the speaker circular telegram, the vibrating diaphragm vibration makes a sound, because the speaker passes through pressure release hole and back cavity intercommunication, the pressure of back cavity just can produce the change when the vibrating diaphragm vibrates in order to order about the corresponding activity of moving part, in order to slow down the pressure change of back cavity, thereby reduce the loss of the mechanical energy that the vibrating diaphragm obtained in the opposition back cavity pressure change in-process, and then make more mechanical energy be used for ordering about vibrating diaphragm vibration sound production, avoid back cavity pressure to change too big vibrating diaphragm amplitude that leads to and reduce, the electroacoustic conversion efficiency and the sensitivity of improvement audio amplifier. Namely, the pressure change in the back cavity is transferred into the buffer cavity, so that the pressure in the back cavity is kept stable, the phenomenon that the vibration diaphragm moves is obstructed due to the pressure change of the back cavity is avoided, and the electro-acoustic conversion efficiency and the sensitivity of the sound box are improved.

Meanwhile, when the moving part moves towards one side of the rear cavity, the pressure in the buffer cavity is reduced to generate a suction force for blocking the moving part to move towards the rear cavity, and when the moving part moves to the maximum amplitude along with the vibrating diaphragm, the suction force applied to the moving part by the buffer cavity is the maximum, so that the moving part is rapidly reset and the vibrating diaphragm is driven to rapidly reset, and the vibrating diaphragm timely responds to the change of a subsequent electric signal to move and sound; when the moving part moves to cushion chamber one side, thereby the increase of pressure intensity in the cushion chamber produces the repulsion that hinders the moving part to the motion of cushion chamber one side, when the moving part moves to the maximum amplitude along with the vibrating diaphragm, the effort that the cushion chamber applyed to the moving part is the biggest, and simultaneously, the magnetic component who sets up in the audio amplifier also can hinder the moving part to move to cushion chamber one side, also can exert the effort that moves to chamber one side to the moving part when the moving part resets to chamber one side backward, make the moving part reset rapidly and order about the vibrating diaphragm and reset fast under the magnetic force effect of cushion chamber repulsion and magnetic component, so that the vibrating diaphragm in time responds follow-up signal of telecommunication change vibration sound production, thereby make the audio amplifier have better transient characteristic. That is, this application has improved the electroacoustic conversion efficiency and the sensitivity of audio amplifier through the mode that sets up moving part and magnetic component in the casing, and makes the audio amplifier have better transient characteristic.

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 the structures shown in the drawings without creative efforts.

FIG. 1 is a structural diagram of an embodiment of the speaker of the present invention;

FIG. 2 is a cross-sectional view of the enclosure of FIG. 1;

fig. 3 is an exploded view of the enclosure of fig. 1.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				100	Sound box	16	Limiting step
10	Shell body	20	Loudspeaker
				11	Upper casing	21	Vibrating diaphragm
111	Sound outlet	22	Pressure relief hole
				12	Lower casing	30	Movable part
13	Containing cavity	31	Guide hole
				131	Rear cavity	40	Magnetic assembly
132	Buffer cavity	41	First magnetic part
				14	Guide post	42	Second magnetic part
15	Limiting column	50	Sound-absorbing cotton

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

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, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.

In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

In view of the technical problems reflected in the background art, the present invention provides a sound box 100 to improve the electroacoustic conversion efficiency and the sensitivity of the sound box 100, and simultaneously maintain the better transient characteristics.

The following description will be made of a specific structure of the sound box 100 according to the present invention in a specific embodiment:

as shown in fig. 1 to 3, in some embodiments of the acoustic enclosure 100 of the present invention, the acoustic enclosure 100 includes:

the loudspeaker comprises a shell 10, wherein an accommodating cavity 13 is formed in the shell 10, and the shell 10 is provided with a sound outlet 111 communicated with the accommodating cavity 13;

the loudspeaker 20 is accommodated in the accommodating cavity 13, and the sound outlet 111 is sealed by the loudspeaker 20;

the movable element 30, the movable element 30 is transversely separated from the accommodating cavity 13 to divide the accommodating cavity 13 into a rear cavity 131 and a buffer cavity 132, the pressure relief hole 22 of the speaker 20 is communicated with the rear cavity 131, and the movable element 30 can reciprocate in the accommodating cavity 13 to change the volumes of the rear cavity 131 and the buffer cavity 132; and

the magnetic component 40, the magnetic component 40 includes a first magnetic component 41 and a second magnetic component 42, the first magnetic component 41 is disposed on the movable component 30, and the second magnetic component 42 is disposed on the housing 10 and cooperates with the first magnetic component 41 to hinder the movable component 30 from vibrating toward the buffer cavity 132 side.

The present application provides a sound box 100, a multi-finger enclosed sound box 100. In a conventional closed type sound box, a housing 10 is provided as an installation base, a receiving cavity 13 is formed in the housing 10 for installing a speaker 20, and the receiving cavity 13 of the housing 10 is communicated with a pressure relief hole 22 of the speaker 20 to form a rear cavity 131 of the speaker 20 in a conventional state. With the sound radiation direction of the loudspeaker 20 as the front side, because the casing 10 is closed, when the diaphragm 21 moves backwards, the instantaneous volume of the back cavity 131 is reduced, so that the pressure in the back cavity 131 is increased, and a forward pushing force is generated on the diaphragm 21, so that the diaphragm 21 is pushed to move forwards and reset quickly; when the diaphragm 21 moves forward, the instantaneous volume increase of the back cavity 131 causes the pressure in the back cavity 131 to decrease and generate a backward suction force to the diaphragm 21, so as to drive the diaphragm 21 to move backward and reset quickly, so that the diaphragm 21 has a better transient characteristic, and the characteristics of the sound effect are that when playing music with fast change or rich content, the diaphragm 21 can reset quickly to respond to the changed electric signal quickly, and the delay is low.

However, in the existing closed-type sound box, the change of the pressure in the back cavity 131 also causes the motion amplitude of the diaphragm 21 when sensing the motion of the electrical signal to decrease, for example, during the process that the diaphragm 21 senses the motion of the electrical signal to move forward, the pressure in the back cavity 131 gradually decreases and generates a suction force that hinders the forward motion of the diaphragm 21, and at this time, the electrical signal drives a part of the mechanical energy of the forward motion of the diaphragm 21 to resist the suction force of the back cavity 131, resulting in the motion amplitude of the forward motion of the electrical signal sensed by the diaphragm 21 decreasing; during the backward movement of the diaphragm 21 induced by the electrical signal, the pressure in the back cavity 131 gradually increases and generates a repulsive force that hinders the backward movement of the diaphragm 21, and at this time, a part of the mechanical energy of the electrical signal driving the backward movement of the diaphragm 21 is used to resist the repulsive force of the back cavity 131, resulting in a decrease in the movement amplitude of the forward movement of the electrical signal induced by the diaphragm 21. That is, although the change of the pressure in the back cavity 131 when the diaphragm 21 vibrates can drive the diaphragm 21 to reset rapidly after the induced electrical signal moves, the change of the pressure in the back cavity 131 also causes a hindrance to the electrical signal driving the diaphragm 21 to move, so that the mechanical energy portion of the electrical signal driving the diaphragm 21 to vibrate is used to resist the resistance applied to the diaphragm 21 by the back cavity 131, resulting in the loss of mechanical energy, and the motion amplitude of the diaphragm 21 induced the electrical signal moves is reduced, the electro-acoustic conversion efficiency of the speaker 20 is reduced, and the sensitivity of electro-acoustic conversion is affected.

In order to solve the problem of low electroacoustic conversion efficiency of the closed type sound box 100, a scheme of opening a pressure relief hole 22 in the rear cavity 131 is adopted in a common solution, which is specifically embodied in that a small hole communicating the rear cavity 131 with the outside is opened in the casing 10 of the closed type sound box 100, when the vibrating diaphragm 21 moves backwards, the pressure relief is performed to the outside through the small hole, and when the vibrating diaphragm 21 moves forwards, the pressure is increased into the casing 10, namely, the pressure change in the rear cavity 131 when the vibrating diaphragm 21 vibrates is reduced, so that the electroacoustic conversion efficiency is improved. However, once the opening is too small, resonance in the housing 10 is easily generated, and a resonance peak of a frequency response curve occurs, so that the sound effect of the sound box 100 is affected, and in order to avoid the generation of resonance, a foam is required to be attached to the opening, so that the electroacoustic conversion efficiency is undoubtedly reduced, and the problem cannot be fundamentally solved; when the opening is too large, wind noise is easily generated, which causes sound dyeing and also affects the sound effect of the sound box 100.

Another way to solve the low efficiency of electro-acoustic conversion of the enclosed sound box 100 is to use a phase inversion type sound box 100 design. Namely, a pipeline is arranged in the casing 10, and an air outlet of the pipeline is arranged on the casing 10, namely, a large opening is formed in the side wall of the casing 10, so that sound waves and sound pressure behind the diaphragm 21 are released to the outside. Such designs also suffer from wind and sound staining, and such designs have fallen outside the scope of the enclosed enclosure 100 and do not have the characteristics of the enclosed enclosure 100.

The present application, in turn, provides a movable member 30 within the housing 10 of the sound box 100. The movable member 30 is transversely partitioned in the accommodating cavity 13 to divide the accommodating cavity 13 into a rear cavity 131 and a buffer cavity 132, the rear cavity 131 and the buffer cavity 132 are isolated from each other, and the speaker 20 is communicated with the rear cavity 131 through the pressure relief hole 22. Meanwhile, the movable element 30 can reciprocate in the accommodating cavity 13 to adjust the volumes of the back cavity 131 and the buffer cavity 132 in the moving process, wherein the movable element 30 can be an elastic membrane or a rigid element, when the movable element 30 is an elastic membrane, the edge of the elastic membrane is fixedly connected with the cavity wall of the accommodating cavity 13, so that the elastic membrane is transversely separated in the accommodating cavity 13, and when the elastic membrane is driven by the vibrating membrane 21 to vibrate and deform in a reciprocating manner, the volumes of the back cavity 131 and the buffer cavity 132 can be adjusted. When the movable member 30 is a rigid member, it may be a plate-shaped member or other shape structure, and only the accommodating cavity 13 needs to be divided into the rear cavity 131 and the buffer cavity 132, and at this time, the movable member 30 is integrally slidably disposed in the accommodating cavity 13, so that the diaphragm 21 drives the movable member 30 to integrally move in the accommodating cavity 131, thereby adjusting the volumes of the rear cavity 131 and the buffer cavity 132.

The operation of the sound box 100 of the present application is as follows.

With the direction of sound radiation from the front of the speaker 20 as the front, when the speaker 20 is powered on to make the diaphragm 21 induce an electrical signal to move forward, the volume of the back cavity 131 increases to make the pressure of the back cavity 131 decrease, thereby generating a suction force to the movable member 30 to drive the movable member 30 to move forward, so as to slow down the volume and pressure change of the back chamber 131, thereby reducing the suction force of the back chamber 131 to hinder the forward movement of the diaphragm 21, thereby reducing the mechanical energy for resisting the suction force of the back cavity 131 when the diaphragm 21 is driven to move forwards by the electrical signal, reducing the loss of the mechanical energy, so that more mechanical energy is used for driving the diaphragm 21 to move forwards, that is, the movable part 30 can avoid the overlarge pressure change in the back cavity 131 when moving forwards along with the diaphragm 21, so that the diaphragm 21 can be driven by the electric signal to move forward sufficiently, and the electroacoustic conversion efficiency and the electroacoustic conversion sensitivity of the loudspeaker 20 are improved.

Meanwhile, when the moving member 30 moves forward along with the diaphragm 21, the volume of the buffer cavity 132 gradually increases to gradually decrease the pressure of the buffer cavity 132, so that gradually increased suction applied to the moving member 30 is generated, the forward movement speed of the moving member 30 is gradually reduced, when the diaphragm 21 moves to the maximum amplitude, the moving member 30 also stops moving, at this time, the suction applied to the buffer cavity 132 by the moving member 30 is the maximum, so that the moving member 30 can be quickly reset backwards to increase the volume of the back cavity 131, and the pressure of the back cavity 131 is reduced, so that the suction applied to the diaphragm 21 is generated to drive the diaphragm 21 to reset. For a traditional closed type sound box, in the process that the diaphragm 21 is reset backwards, the volume of the back cavity 131 is continuously reduced, and the suction force of the back cavity 131 to the diaphragm 21 is gradually reduced; in the present application, the movable member 30 moves backward when the diaphragm 21 is reset, so that the volume of the back cavity 131 is increased, and the pressure is reduced, thereby providing a larger suction force to the diaphragm 21 to drive the diaphragm 21 to reset more quickly, so that the diaphragm 21 timely responds to the vibration sound of the subsequent electrical signal, and the transient characteristic of the sound box 100 is improved.

Similarly, when the diaphragm 21 induces the electrical signal to move backward, the volume of the back cavity 131 is reduced to increase the pressure of the back cavity 131, so that a repulsive force to the moving member 30 is generated to drive the moving member 30 to move backward, thereby reducing a repulsive force of the back cavity 131 hindering the backward movement of the diaphragm 21, further reducing mechanical energy for resisting the repulsive force of the back cavity 131 when the electrical signal drives the diaphragm 21 to move backward, reducing mechanical energy loss, and enabling more mechanical energy to be used for driving the diaphragm 21 to move backward, that is, when the moving member 30 moves backward with the diaphragm 21, avoiding an excessive pressure change in the back cavity 131, so that the diaphragm 21 can fully move backward under the driving of the electrical signal, and improving the electro-acoustic conversion efficiency and the electro-acoustic conversion sensitivity of the speaker 20.

Meanwhile, when the moving member 30 moves backward along with the diaphragm 21, the volume of the buffer chamber 132 gradually decreases to gradually increase the pressure of the buffer chamber 132, so that an increasing repulsive force applied to the moving member 30 is generated, the backward movement speed of the moving member 30 is gradually slowed down, when the diaphragm 21 moves to the maximum amplitude, the moving member 30 also stops moving, and at this time, the repulsive force applied to the buffer chamber 132 is the maximum, so that the moving member 30 can be rapidly restored forward to reduce the volume of the back chamber 131, increase the pressure of the back chamber 131, and thus the repulsive force applied to the diaphragm 21 is generated to drive the diaphragm 21 to restore. For a traditional closed type sound box, in the process of forward resetting of the vibrating diaphragm 21, the volume of the rear cavity 131 is continuously increased, and the repulsive force of the rear cavity 131 to the vibrating diaphragm 21 is gradually reduced; in the present application, the movable member 30 moves forward when the diaphragm 21 is reset, so that the volume of the back cavity 131 is reduced, and the pressure is increased, thereby providing a larger repulsive force to the diaphragm 21 to drive the diaphragm 21 to reset faster, so that the diaphragm 21 timely responds to a subsequent electrical signal to sound with vibration, and the transient characteristic of the sound box 100 is improved.

It is not difficult to understand, compare in traditional closed audio amplifier 100, the audio amplifier 100 of this application can drive the reciprocating motion of moving part 30 when vibrating diaphragm 21 vibrates in order to slow down the volume and the pressure change of back chamber 131, make back chamber 131 pressure change diminish, the resistance that hinders vibrating diaphragm 21 motion that back chamber 131 produced because of pressure change when vibrating diaphragm 21 response electric signal motion has so reduced, thereby the loss of mechanical energy that vibrating diaphragm 21 obtained is in the process of antagonizing back chamber 131 pressure change has been reduced, can make more mechanical energy be used for driving vibrating diaphragm 21 vibration sound production, avoid back chamber 131 pressure change great influence vibrating diaphragm 21 vibration, the acoustoelectric conversion efficiency of audio amplifier 100 has been improved. Meanwhile, since the pressure of the buffer chamber 132 changes when the moving member 30 moves, and a restoring force for restoring the moving member 30 and the diaphragm 21 is generated, the diaphragm 21 can be quickly restored after the motion of the induced electrical signal to respond to a subsequent electrical signal for vibration and sound generation, so that the sound box 100 has better transient characteristics.

Further, the sound box 100 of the present application is further provided with a magnetic component 40, the magnetic component 40 includes a first magnetic component 41 and a second magnetic component 42, the first magnetic component 41 is disposed on the movable component 30 to vibrate together with the movable component 30, and the second magnetic component 42 is disposed on the housing 10 and cooperates with the first magnetic component 41 to apply a magnetic force to hinder the movable component 30 from moving to the side of the buffer cavity 132. It will be appreciated that as the diaphragm 21 vibrates backwards, the pressure in the back chamber 131 increases, driving the moveable member 30 towards the buffer chamber 132, during this process, the pressure in the buffer chamber 132 gradually increases, and a gradually increasing repulsive force is generated to the movable member 30, at the same time, the second magnetic member 42 applies a magnetic force to the first magnetic member 41 while blocking the vibration of the movable member 30, so that the moving speed of the movable member 30 is gradually slowed, so that when the amplitude of the movement of the movable element 30 toward the buffer chamber 132 reaches a maximum, the acting force of the buffer chamber 132 on the movable element 30 is the maximum, and at this time, in addition to the magnetic force provided by the magnetic element 40, the restoring force for restoring the movable element 30 toward the rear chamber 131 side is larger, so that the movable element 30 can be restored faster and the diaphragm 21 can be restored faster, so that the diaphragm 21 can respond to the subsequent electrical signal in time to vibrate and sound, and the sound box 100 has better transient characteristics. When the moving member 30 is subjected to a magnetic repulsive force of the adjusting mechanism 40 in the process of moving to the side away from the buffer cavity 132, the force applied to the moving member 30, which is mainly generated by the pressure changes of the rear cavity 131 and the buffer cavity 132, reduces the movement of the moving member 30, and drives the moving member 30 to be rapidly reset after the moving member 30 moves to the maximum amplitude, so that the diaphragm 21 timely responds to a subsequent electrical signal to vibrate and sound.

In addition, when the sound box 100 does not operate, the superposition of the pressure of the buffer chamber 132 and the magnetic force between the second magnetic member 42 and the first magnetic member 41 maintains a balanced state with the pressure of the back chamber 131, so that the movable member 30 maintains a fixed position and shape, and the movable member 30 is prevented from moving to the buffer chamber 132 side due to external force such as vibration or the action of self gravity, thereby maintaining the position and the structure stability of the movable member 30 and the diaphragm 21.

In this embodiment, the second magnetic member 42 applies a magnetic force to the first magnetic member 41 to prevent the movable member 30 from moving to the buffer cavity 132 side, the second magnetic member 42 may be disposed in the rear cavity 131 to apply a magnetic attraction force to the first magnetic member 41, in this case, one of the first magnetic member 41 and the second magnetic member 42 may be a magnet, the other one of the first magnetic member 41 and the second magnetic member 42 may be a magnetically conductive material that can be attracted by the magnet, or both the first magnetic member 41 and the second magnetic member 42 may be a magnet. Of course, the second magnetic member 42 may be disposed in the buffer cavity 132 to apply a magnetic repulsive force to the first magnetic member 41, and at this time, the first magnetic member 41 and the second magnetic member 42 are both magnets, and the magnetic poles disposed oppositely are the same. It should be noted that, in the present embodiment, when the movable element 30 is an elastic membrane, the elastic membrane is fixedly connected to the cavity wall of the accommodating cavity 13, and the first magnetic element 41 can be disposed in the middle of the elastic membrane to vibrate along with the elastic membrane.

Therefore, it can be understood that, in the technical solution of the present invention, the speaker 20 is disposed at the sound outlet 111 of the casing 10 to radiate sound outwards, and the movable element 30 is disposed in the casing 10 of the sound box 100 to divide the accommodating chamber 13 in the casing 10 into the rear chamber 131 and the buffer chamber 132, so that the pressure relief hole 22 of the speaker 20 is communicated with the rear chamber 131, and the movable element 30 can reciprocate in the accommodating chamber 13. So set up, when speaker 20 circular telegram, vibrating diaphragm 21 vibrates and makes a sound, because speaker 20 communicates with back chamber 131 through pressure release hole 22, the pressure in back chamber 131 just can produce the change when vibrating diaphragm 21 vibrates in order to order about the corresponding activity of moving part 30, in order to slow down and reduce the pressure change in back chamber 131, thereby can reduce the mechanical energy that vibrating diaphragm 21 obtained and be in the loss of antagonism back chamber 131 pressure change in-process, can make more mechanical energy be used for ordering about vibrating diaphragm 21 vibration sound production, avoid back chamber 131 pressure change too big lead to vibrating diaphragm 21 amplitude to reduce, the electroacoustic conversion efficiency and the sensitivity of audio amplifier 100 have been improved. That is, the pressure change in the back chamber 131 is transferred to the buffer chamber 132, so that the pressure in the back chamber 131 is kept stable, and the phenomenon that the diaphragm 21 is obstructed due to the pressure change in the back chamber 131 is avoided, thereby improving the electroacoustic conversion efficiency and the sensitivity of the sound box 100.

Meanwhile, when the moving member 30 moves towards one side of the back cavity 131, the pressure in the buffer cavity 132 is reduced to generate a suction force for blocking the moving member 30 from moving towards the back cavity 131, and when the moving member 30 moves to the maximum amplitude along with the diaphragm 21, the suction force applied by the buffer cavity 132 to the moving member 30 is the maximum, so that the moving member 30 is rapidly reset and the diaphragm 21 is driven to rapidly reset, and the diaphragm 21 timely responds to the change of a subsequent electric signal to vibrate and sound; when the moving member 30 moves to the side of the buffer cavity 132, the pressure in the buffer cavity 132 increases to generate a repulsive force that hinders the moving member 30 from moving to the side of the buffer cavity 132, when the moving member 30 vibrates to the maximum amplitude along with the diaphragm 21, the acting force exerted by the buffer cavity 132 to the moving member 30 is the maximum, and at the same time, the magnetic component 40 disposed in the sound box 100 also hinders the moving member 30 from moving to the side of the buffer cavity 132, and when the moving member 30 resets to the side of the back cavity 131, the acting force that moves to the side of the back cavity 131 can be exerted to the moving member 30, so that the moving member 30 resets rapidly and drives the diaphragm 21 to reset rapidly under the repulsive force of the buffer cavity 132 and the magnetic force of the magnetic component 40, so that the diaphragm 21 responds to the subsequent electrical signal change in time to vibrate and sound, thereby enabling the sound box 100 to have better transient characteristics. That is, in the present invention, the movable element 30 and the magnetic element 40 are disposed in the housing 10, so that the electroacoustic conversion efficiency and the sensitivity of the sound box 100 are improved, and the sound box 100 has better transient characteristics.

Referring to fig. 2, in some embodiments of the sound box 100 of the present invention, the second magnetic member 42 is disposed in the buffer cavity 132, the second magnetic member 42 and the first magnetic member 41 are disposed oppositely along the vibration direction of the movable member 30, and the magnetic poles of the second magnetic member 42 and the first magnetic member 41 are the same.

In this embodiment, the first magnetic member 41 and the second magnetic member 42 are both magnets, and may be a substance with magnetism, such as a permanent magnetic material (specifically, an alnico permanent magnetic alloy, an iron-chromium-cobalt permanent magnetic alloy, a permanent magnetic ferrite, a rare earth permanent magnetic material, a composite permanent magnetic material, etc.), or may be formed by combining a soft magnetic material (specifically, iron, an iron alloy, nickel, a nickel alloy, cobalt, a cobalt alloy, etc.) with a coil, and preferably, the first magnetic member 41 and the second magnetic member 42 are made of a permanent magnetic material. At this time, the second magnetic member 42 is disposed in the buffer cavity 132, and the magnetic poles of the second magnetic member 42 and the first magnetic member 41 are the same, so that the first magnetic member 41 and the second magnetic member 42 repel each other, and the magnetic repulsion between the first magnetic member 41 and the second magnetic member 42 can prevent the first magnetic member 41 and the movable member 30 from moving to the buffer cavity 132 side, so as to drive the movable member 30 and the diaphragm 21 to rapidly return when the movable member 30 moves backward along with the diaphragm 21, compared with the way that the second magnetic member 42 is disposed at the rear cavity 131 side to provide the magnetic attraction to the first magnetic member 41, the second magnetic member 42 is disposed in the buffer cavity 132 to apply the magnetic repulsion to the first magnetic member 41, so that the magnetic force provided by the magnetic member 40 to the movable member 30 is gradually increased when the movable member 30 moves to the buffer cavity 132 side, so that the movable member 30 having the maximum amplitude can receive the maximum magnetic force of the magnetic member 40 even when the movable member 30 has the maximum repulsion received by the buffer cavity 132, therefore, the movable element 30 is rapidly reset under the repulsive force of the buffer cavity 132 and the magnetic force of the magnetic component 40, and drives the diaphragm 21 to be rapidly reset, so that the diaphragm 21 timely responds to the subsequent electrical signal change to vibrate and sound, and the sound box 100 has better transient characteristics.

In this embodiment, the second magnetic member 42 is disposed in the buffer cavity 132 and is repulsive to the first magnetic member 41. When the movable member 30 moves toward the rear chamber 131 side with the diaphragm 21, there are the following cases: when the movable member 30 moves to the rear chamber 131 side, the first magnetic member 41 and the second magnetic member 42 are always in a repulsive state; before the movable member 30 moves to the rear chamber 131 to the maximum amplitude, the first magnetic member 41 and the second magnetic member 42 are far away from each other and do not repel each other; when the movable member 30 moves to the maximum amplitude toward the rear chamber 131, the first and second magnetic members 41 and 42 just exceed the magnetic field range therebetween. In a preferred embodiment, the first magnetic member 41 and the second magnetic member 42 are always in a repulsive state when the movable member 30 moves along with the diaphragm 21, and at this time, the movable member 30 is always driven by the pressure change of the back cavity 131 and the magnetic repulsive force of the magnetic assembly 40 when moving to the side of the back cavity 131, so as to respond to the vibration of the diaphragm 21 quickly, reduce and lessen the pressure change of the back cavity 131 quickly, and avoid the vibration of the diaphragm 21 being affected by an excessive pressure difference of the back cavity 131; meanwhile, when the moveable member 30 is restored to the side of the buffer chamber 132, the problem that the acting force applied to the moveable member 30 suddenly changes in a step-like manner due to the magnetic repulsion of the magnetic element 40 during the restoration process of the moveable member 30, which affects the stability of the moveable member 30 during the movement process, is avoided.

Referring to fig. 2, in some embodiments of the sound box 100 of the present invention, the first magnetic element 41 is disposed on a side surface of the movable element 30 facing the buffer cavity 132, and is spaced apart from the second magnetic element 42.

In this embodiment, the first magnetic member 41 is disposed on a side surface of the movable member 30 facing the buffer cavity 132 and spaced apart from the second magnetic member 42, so as to couple with the second magnetic member 42 to block the movable member 30 from moving to the buffer cavity 132 side. With such an arrangement, the first magnetic member 41 can be prevented from colliding with the speaker 20 when the movable element 30 vibrates, thereby improving the safety in use.

Further, in some embodiments, the movable element 30 may be made of a magnetic shielding material, so as to prevent the magnetic force of the first magnetic element 41 and the second magnetic element 42 from affecting the magnetic field in the speaker 20, and prevent the diaphragm 21 from vibrating to radiate sound, thereby ensuring that the speaker 20 has a better sound effect.

Referring to fig. 100, in some embodiments of the sound box 100 of the present invention, the sound box 100 further includes a sound-absorbing cotton 50, the sound-absorbing cotton 50 is laid on the bottom wall of the buffer cavity 132, and the second magnetic member 42 is disposed around the sound-absorbing cotton 50.

In this embodiment, the sound absorption cotton 50 is laid on the bottom wall of the buffer cavity 132, when the moving member 30 vibrates under the driving of the vibrating diaphragm 21, pressure changes exist in the buffer cavity 132, and at this time, the sound absorption cotton 50 can absorb partial pressure difference generated in the buffer cavity 132, so as to avoid that the vibration of the moving member 30 is influenced by the excessive change of the pressure difference in the buffer cavity 132. Simultaneously, inhale sound cotton 50's setting, the noise when also transmitting the sound wave in holding chamber 13 and the moving part 30 vibration when absorbing speaker 20 vibrating diaphragm 21 vibration, avoid the sound wave to produce the resonance in holding chamber 13 internal repeated reflection, lead to tone quality to contain muddy, inhale sound cotton 50's setting and can effectively improve audio amplifier 100's tone quality. In this embodiment, since the second magnetic member 42 is also disposed in the buffer cavity 132, the second magnetic member 42 is disposed around the sound-absorbing cotton 50, so that the sound-absorbing cotton 50 is disposed over the moving member 30 and the speaker 20 to a greater extent, and directly absorbs the sound wave of the speaker 20 and the noise of the moving member 30, thereby preventing the second magnetic member 42 from blocking the transmission of the sound wave.

Referring to fig. 2, in some embodiments of the sound box 100 of the present invention, the second magnetic member 42 is disposed along the vibration direction of the movable member 30 and spaced apart from the sound-absorbing cotton 50.

Due to the arrangement, the sound absorption cotton 50 can be laid on the bottom wall of the buffer cavity 132 to the maximum extent, and the laying area of the sound absorption cotton 50 is increased, so that the sound absorption efficiency is improved; meanwhile, the second magnetic piece 42 is prevented from extruding the sound absorption cotton 50, so that the sound absorption cotton 50 is compressed to influence the sound absorption effect.

Referring to fig. 2 and 3, in some embodiments of the sound box 100 of the present invention, the bottom wall of the buffer cavity 132 is convexly provided with a plurality of limiting steps 16, the plurality of limiting steps 16 are arranged at intervals along the circumferential direction of the sound-absorbing cotton 50, and the second magnetic member 42 is supported on the plurality of limiting steps 16.

According to the technical scheme of the application, the magnetic component 40 is arranged, and the second magnetic element 42 applies a magnetic repulsive force to the first magnetic element 41 to block the movable element 30 from moving to one side of the buffer cavity 132; it is understood that the magnetic repulsive force between the second magnetic member 42 and the first magnetic member 41 interacts, and the first magnetic member 41 also applies the magnetic repulsive force to the second magnetic member 42; in this embodiment, the plurality of limiting steps 16 are convexly disposed on the bottom wall of the buffer cavity 132 for supporting the second magnetic member 42, so that the second magnetic member 42 is prevented from moving in a direction away from the first magnetic member 41 under the action of the magnetic repulsive force of the first magnetic member 41, the position stability of the second magnetic member 42 in the buffer cavity 132 is improved, and the magnetic repulsive force applied to the first magnetic member 41 and the moving member 30 by the second magnetic member 42 due to the movement of the second magnetic member 42 is also prevented from being reduced, so that the moving member 30 cannot be rapidly reset, and the transient characteristic of the speaker 20 is affected. Further, a plurality of spacing steps 16 set up along inhaling the circumference interval of sound cotton 50, compare in making spacing step 16 encircle the mode that sets up along the circumference of inhaling sound cotton 50, and a plurality of spacing steps 16 that the interval set up can reduce the area occupied of spacing step 16 on the diapire to the increase inhales the area of laying of sound cotton 50, improve and inhale sound efficiency.

Referring to fig. 2, in some embodiments of the sound box 100 of the present invention, the movable element 30 is a rigid element, and the movable element 30 is slidably disposed in the accommodating cavity 13 to vibrate back and forth under the driving of the diaphragm 21 of the speaker 20.

In this embodiment, the movable element 30 is integrally slidably disposed in the accommodating chamber 13, so that the diaphragm 21 drives the movable element 30 to vibrate integrally, thereby adjusting the volumes of the back chamber 131 and the buffer chamber 132. Meanwhile, the movable member 30 is a rigid member, which may be but not limited to a plastic material, a metal material, a ceramic material, or the like, and may be a plate-shaped structure or other shape structure, and only the accommodation chamber 13 needs to be divided into the rear chamber 131 and the buffer chamber 132, and the rigid movable member 30 is deformed and reduced under the action of an external force, so that the pressure and the magnetic force are mainly used for driving the movable member 30 to slide in the accommodation chamber 13 in a reciprocating manner, thereby reducing the loss of mechanical energy in the vibration process of the movable member 30.

Referring to fig. 3, in some embodiments of the sound box 100 of the present invention, the first magnetic element 41 is disposed around the movable element 30 in a circumferential direction.

In the technical solution of the foregoing embodiment, the movable element 30 is made of a rigid material, and is driven by the diaphragm 21 to slide in the accommodating cavity 13 in a reciprocating manner, so as to adjust the volumes of the back cavity 131 and the buffer cavity 132, thereby improving the electroacoustic conversion efficiency and sensitivity of the sound box 100, and meanwhile, the magnetic element 40 is arranged to cooperate with the buffer cavity 132 to enable the movable element 30 and the diaphragm 21 to reset rapidly, so that the sound box 100 has a better transient characteristic. In the embodiment, the first magnetic element 41 of the magnetic element 40 is circumferentially disposed along the circumferential direction of the movable element 30, so that the magnetic force applied to the first magnetic element 41 by the second magnetic element 42 is uniformly distributed along the circumferential direction of the movable element 30, and the movable element 30 is subjected to the uniformly distributed magnetic force during the movement process, so that the sliding of the movable element 30 in the accommodating cavity 13 is more stable.

Referring to fig. 2 and 3, in some embodiments of the sound box 100 of the present invention, the movable member 30 is provided with a guide hole 31, a guide post 14 is disposed in the housing 10, the guide post 14 extends along a moving direction of the movable member 30, and the guide post 14 is disposed through the guide hole 31.

In the solution of the foregoing embodiment, the movable element 30 is slidably disposed in the accommodating chamber 13 as a whole to adjust the volumes of the back chamber 131 and the buffer chamber 132, so as to improve the electroacoustic conversion efficiency and the sensitivity of the sound box 100. In this embodiment, a guiding structure is disposed in the sound box 100, the guiding structure includes a guiding post 14 and a guiding hole 31 that are matched with each other, wherein the guiding hole 31 is correspondingly disposed on the moving member 30, the guiding post 14 is disposed in the housing 10 and extends along the moving direction of the moving member 30, and the guiding post 14 is disposed in the guiding hole 31 in a penetrating manner, so that the moving member 30 slides along the guiding post 14, and the stability of the moving process of the moving member 30 is improved. Of course, the guide post 14 may also be disposed on the moving element 30, and a connecting portion is correspondingly disposed in the accommodating cavity 13, and a guide hole 31 is formed in the connecting portion, so that the moving element 30 can slide along the guide post 14 by the guide post 14 being disposed in the guide hole 31 in a penetrating manner, and the stability of the moving process of the moving element 30 is also improved.

Referring to fig. 3, in some embodiments of the sound box 100 of the present invention, the bottom wall of the buffer cavity 132 is protruded with a limit step 16, and the second magnetic member 42 is supported on the limit step 16;

the top of the limit step 16 is convexly provided with a guide post 14, and the guide post 14 extends toward the movable member 30 and penetrates through the movable member 30 and the first magnetic member 41.

In this embodiment, the second magnetic member 42 is disposed in the buffer cavity 132 and disposed opposite to the first magnetic member 41, and the magnetic poles of the second magnetic member 42 and the first magnetic member 41 are opposite, so that the first magnetic member 41 and the second magnetic member 42 repel each other, and the movable member 30 is driven to rapidly reset after the movable member 30 moves to one side of the buffer cavity 132 along with the diaphragm 21. In addition, in the technical solution of this embodiment, the limiting step 16 is convexly disposed on the bottom wall of the buffer cavity 132, and is used for supporting the second magnetic member 42 to limit the second magnetic member 42, so as to prevent the second magnetic member 42 from being displaced by the repulsive force of the first magnetic member 41, and improve the position stability of the second magnetic member 42.

Further, the guide post 14 is convexly disposed on the top surface of the limit step 16, and the guide post 14 is disposed through the movable element 30 and the first magnetic element 41, so as to improve the stability of the movable element 30 during the movement process. Still further, the limiting step 16 is a multi-step structure, the second magnetic member 42 is supported on the step surface of the first step and is spaced from the top surface of the multi-step structure, and the guide post 14 is protruded on the top surface of the multi-step structure, so that when the moving member 30 and the first magnetic member 41 slide along the guide post 14, the moving member 30 and the second magnetic member 42 are prevented from colliding with each other and being damaged, and the use safety is improved.

In some embodiments, the sound-absorbing cotton 50 is laid on the bottom wall of the buffer cavity 132, the plurality of limiting steps 16 are convexly arranged on the bottom wall of the buffer cavity 132, the plurality of limiting steps 16 are arranged along the circumferential interval of the sound-absorbing cotton 50, at this time, the top surface of each limiting step 16 is convexly provided with one guide post 14, and compared with a mode that the guide posts 14 are directly arranged on the bottom wall in a protruding manner, the occupied areas of the limiting steps 16 and the guide posts 14 on the bottom wall can be effectively reduced, so that the laying area of the sound-absorbing cotton 50 is increased, and the sound-absorbing efficiency is improved.

Referring to fig. 3, in some embodiments of the sound box 100 of the present invention, the guiding post 14 is disposed on a side wall of the accommodating cavity 13, and the guiding hole 31 is opened on an edge of the movable member 30.

In this embodiment, the guide hole 31 is disposed on the moving element 30 and located at the edge of the moving element 30, and the guide post 14 is correspondingly disposed on the cavity wall of the accommodating cavity 13, so that the contact area between the guide post 14 and the guide hole 31 can be reduced, the contact area between the moving element 30 and the housing 10 can be reduced, the friction between the moving element 30 and the housing 10 during the moving process can be reduced, and the sliding process of the moving element 30 in the housing 10 can be smoother.

Further, in some embodiments, the guide hole 31 is provided in plural, the plural guide holes 31 are spaced apart from each other along the circumferential direction of the movable member 30, the plural guide posts 14 are provided, and each guide post 14 is inserted into one of the plural guide holes 31.

It can be understood that the stability of the moving process of the movable member 30 can be further improved by providing a plurality of sets of guide structures in the sound box 100, with a guide hole 31 and a guide post 14 cooperating with each other as a set of guide structures.

In some embodiments of the sound box 100 of the present invention, the circumferential side wall of the movable member 30 is attached to the cavity wall of the accommodating cavity 13;

or, a lubricating layer is arranged between the circumferential side wall of the moving part 30 and the cavity wall of the accommodating cavity 13.

According to the technical scheme, the movable piece 30 is transversely separated from the accommodating cavity 13 of the shell 10, the accommodating cavity 13 is separated into the rear cavity 131 and the buffer cavity 132 which are isolated from each other, the movable piece 30 slides in the accommodating cavity 13 in a reciprocating manner when the vibrating diaphragm 21 moves, and the fact that the sound-electricity conversion efficiency and the sensitivity of the loudspeaker 20 are influenced by the pressure change in the rear cavity 131 is avoided. It can be understood that, in the sliding process of the moving member 30, the moving member 30 needs to always isolate the rear cavity 131 from the buffer cavity 132, that is, the moving member 30 has better sealing performance in the sliding process, at this time, the moving member 30 and the housing 10 can be completely attached to meet the sealing requirement, and in order to reduce the friction between the sliding process of the moving member 30 and the cavity wall of the accommodating cavity 13, the circumferential side wall of the moving member 30 and the cavity wall of the accommodating cavity 13 can be kept at a higher finish degree. Or, a lubricating layer is arranged between the circumferential side wall of the moving part 30 and the cavity wall of the accommodating cavity 13, which may be but is not limited to lubricating oil and lubricating grease, and the grease material can effectively fill the gap between the circumferential side wall of the moving part 30 and the cavity wall of the accommodating cavity 13, so that the sealing capability is high, the friction between the sliding process of the moving part 30 and the cavity wall of the accommodating cavity 13 can be reduced, and the sliding of the moving part 30 can be smoother due to the good sealing performance of the moving part 30 in the sliding process.

Referring to fig. 1 and 3, in some embodiments of the sound box 100 of the present invention, the housing 10 includes:

the upper shell 11, the sound outlet 111 is opened on the upper shell 11, and the speaker 20 is arranged in the upper shell 11; and

the inferior valve 11, inferior valve 11 with the mutual lid of epitheca 11 closes in order to enclose and close formation the holding chamber 13, the moving part 30 with magnetic component 40 all locates in the inferior valve 11.

In this embodiment, the housing 10 is provided as a split type upper housing 11 and a split type lower housing 11, wherein the upper housing 11 and the lower housing 11 are mutually covered to enclose the accommodating cavity 13. In this embodiment, mounting spaces are formed in the upper casing 11 and the lower casing 11, the upper casing 11 is further provided with the sound outlet 111, and at this time, the speaker 20 is mounted in the mounting space of the upper casing 11 and aligned with the sound outlet 111 so as to radiate sound outwards after the upper casing 11 and the lower casing 11 are closed; the movable member 30 and the magnetic member 40 are further disposed in the lower case 11. So set up, only need dismantle epitheca 11 and inferior valve 11, can part sound production subassembly and adjusting part in audio amplifier 100 for audio amplifier 100's dismouting is more convenient. In this embodiment, the connection manner between the upper shell 11 and the lower shell 11 may be, but is not limited to, a threaded connection, a snap connection, a magnetic attraction, an adhesion, or a combination of two or more of the foregoing connection manners, and is not limited herein.

With further reference to fig. 2 and 3, in some embodiments of the sound box 100 of the present invention, the opening of the lower shell 11 is convexly provided with a plurality of limiting pillars 15, the plurality of limiting pillars 15 are arranged at intervals along the circumferential direction of the opening, the upper shell 11 covers the opening of the lower shell 11, and the plurality of limiting pillars 15 abut against the inner sidewall of the upper shell 11;

so set up, can increase the area of contact of epitheca 11 and inferior valve 11, make epitheca 11 and a plurality of spacing post 15 block simultaneously, can improve the stability of being connected between epitheca 11 and the inferior valve 11, also be convenient for fix a position when epitheca 11 and inferior valve 11 equipment, improve audio amplifier 100's installation convenience.

Similarly, in some embodiments, the protruding a plurality of spacing posts 15 that are equipped with of opening of epitheca 11, it is a plurality of spacing post 15 is followed open-ended circumference interval sets up, inferior valve 11 shroud in the opening of epitheca 11, it is a plurality of spacing post 15 butt in the inside wall of inferior valve 11 can increase the area of contact of epitheca 11 with inferior valve 11 equally, makes epitheca 11 and a plurality of spacing post 15 block simultaneously, can improve the stability of being connected between epitheca 11 and the inferior valve 11, also is convenient for fix a position when epitheca 11 and inferior valve 11 assemble, improves audio amplifier 100's installation convenience.

Of course, the position-limiting columns 15 may be provided on both the upper casing 11 and the lower casing 11 of the sound box 100, so as to further improve the connection stability between the upper casing 11 and the lower casing 11.

In some embodiments, the movable member 30 is a rigid member, and the guide post 14 is disposed on the side wall of the accommodating cavity 13 and penetrates through the movable member 30 to guide the movable member 30 to slide along the guide post 14, so that the sliding process of the movable member 30 is more stable, at this time, the limiting post 15 and the guide post 14 can be integrally disposed, that is, the guide post 14 is disposed on the inner side wall of the lower shell 11, and the guide post 14 is extended into the upper shell 11, so that the portion protruding out of the lower shell 11 forms the limiting post 15; or, the guide posts 14 are arranged on the inner side wall of the upper shell 11, and the guide posts 14 are arranged to extend into the lower shell 11, so that the limiting posts 15 are formed on the part protruding out of the upper shell 11, and the production and the processing are convenient.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. An acoustic enclosure, comprising:

2. The sound box according to claim 1, wherein the second magnetic member is disposed in the buffer chamber, the second magnetic member and the first magnetic member are disposed opposite to each other along a vibration direction of the movable member, and magnetic poles of the second magnetic member and the first magnetic member disposed opposite to each other are the same.

3. The sound box according to claim 2, wherein the first magnetic member is disposed on a side surface of the movable member facing the buffer chamber and spaced apart from the second magnetic member.

4. The sound box according to claim 2, further comprising sound-absorbing cotton laid on a bottom wall of the buffer chamber, wherein the second magnetic member is circumferentially disposed along the sound-absorbing cotton.

5. An acoustic enclosure according to claim 4, wherein the second magnetic member is spaced from the acoustic wool along the direction of vibration of the movable member.

6. The sound box according to claim 5, wherein a plurality of limiting steps are protruded from a bottom wall of the buffer chamber, the plurality of limiting steps are arranged at intervals along a circumferential direction of the sound-absorbing cotton, and the second magnetic member is supported by the plurality of limiting steps.

7. The acoustic enclosure according to claim 1, wherein the movable member is a rigid member, the movable member being slidably disposed within the receiving cavity.

8. The acoustic enclosure of claim 7, wherein the first magnetic member is circumferentially disposed about the movable member.

9. The sound box according to claim 7, wherein a limiting step is convexly arranged on the bottom wall of the buffer cavity, and the second magnetic member is supported on the limiting step;

10. The sound box according to any one of claims 1 to 9, wherein the housing comprises an upper shell and a lower shell, the upper shell and the lower shell cover each other to enclose the accommodation chamber, the upper shell is opened with the sound outlet, the speaker is disposed in the upper shell, and the movable member and the magnetic member are both disposed in the lower shell.