Low-frequency portable labyrinth type sound box

Abstract

The invention relates to a low-frequency portable labyrinth type sound box, and belongs to the technical field of loudspeakers. The sound box comprises a box body, a plurality of groups of sound barrier plates arranged in the box body and a sound production assembly, the sound barrier plates form a sound reproduction channel in the box body, one end of the sound reproduction channel is communicated with the back surface of the sound production assembly, and the other end of the sound reproduction channel penetrates through the side wall of the box body to be communicated with the outside. The box body is provided with a dustproof mechanism used for limiting dust from entering and a dust removal mechanism used for cleaning pollutants in the sound reproduction channel at the end part of the sound reproduction channel; the dustproof mechanism comprises a closing plate used for closing the sound reproduction channel, a first driving mechanism used for driving the closing plate to move, and a first sealing structure used for sealing the closing plate and the box body. According to the labyrinth type sound box, dust entering during outdoor use is reduced, and meanwhile, internal dust can be conveniently cleaned.

Description

Technical Field

[0001] The present application relates to the technical field of loudspeakers, and in particular to a low-frequency portable labyrinth speaker. Background Art

[0002] The labyrinth speaker, also known as the meander speaker or transmission line speaker, is a special type of speaker. Its design principle is to install multiple baffles inside the speaker, which form a long and tortuous sound-releasing pipe, so that the sound waves on the back of the speaker unit are reflected through this pipe and then propagated into the space.

[0003] This special structural design enables the labyrinth speaker to perform well in terms of low-frequency diving depth, thereby improving the overall sound effect of the speaker. In order to transmit low-frequency sound waves, the sound channel in the labyrinth speaker needs to be connected to the outside world. However, for some mobile labyrinth speakers used outdoors, dust, water vapor and other pollutants are likely to enter the sound channel during outdoor use or transportation, affecting the sound quality of the speaker during normal use, and long-term pollution will damage the internal structure of the speaker. Summary of the invention

[0004] In order to reduce the ingress of dust into a labyrinth speaker when it is used outdoors and to improve the cleaning effect of internal dust, the present application provides a low-frequency portable labyrinth speaker.

[0005] The present application provides a low-frequency portable maze-type speaker adopts the following technical solution: A low-frequency portable labyrinth speaker comprises a box body, a plurality of groups of sound-baffles arranged in the box body, and a sound-emitting component, wherein the sound-baffles form a sound-releasing channel in the box body, one end of the sound-releasing channel is connected to the back of the sound-emitting component, and the other end passes through the side wall of the box body and is connected to the outside, and the box body is provided with a dust-proof mechanism for limiting the entry of dust and a dust-removing mechanism for cleaning pollutants inside the sound-releasing channel at the end of the sound-releasing channel, and the dust-proof mechanism comprises a closing plate for closing the sound-releasing channel, a first driving mechanism for driving the closing plate to move, and a first sealing structure for sealing the closing plate and the box body.

[0006] By adopting the above technical solution, when using the above labyrinth speaker, the probability of dust and other particles in the air entering the sound release channel during transportation, outdoor unused state or daily storage of the speaker can be reduced by setting the dust-proof mechanism. The first driving mechanism is connected to the closing plate to control the opening and closing of the sound release channel, so that the closing plate is controlled according to the use of the speaker. At the same time, the setting of the first sealing structure further improves the sealing of the closing plate and the speaker. When the speaker is in use, dust still enters the sound release channel. The dust removal mechanism can be used to clean a small amount of dust in the sound release channel to ensure the cleanliness of the sound release channel.

[0007] Optionally, the closing plate is slidably arranged on the box body, the box body has a first sliding groove for arranging the closing plate, the first driving mechanism is arranged on one side of the first sliding groove, the box body has a sealing slot for inserting the closing plate, and the first sealing structure is arranged in the sealing slot.

[0008] By adopting the above technical solution, a matching method between the closing plate and the box body is disclosed. The closing plate is slidably installed on the box body through the first sliding groove. When the speaker is in use, the closing plate is entirely in the first sliding groove. At this time, the sound release channel and the outside air are connected to each other. When the speaker is not in use, the first driving mechanism drives the closing plate to slide along the first sliding groove, so that the closing plate is inserted into the sealing slot and cooperates with the first sealing structure to achieve a sealed cover on the sound release channel.

[0009] Optionally, the first sealing structure comprises a compression sealing ring arranged in the sealing slot, an isolation plate is arranged in the sealing slot, the isolation plate separates the sealing slot into an extrusion slot and a sealing slot, and the extrusion slot and the sealing slot are in communication; The compression sealing ring includes a sealing part arranged in the sealing groove and an extrusion part arranged in the extrusion groove; the closing plate has an extrusion plate for inserting into the extrusion groove and extruding the extrusion part, and the closing plate also has an abutting arc surface adapted to the expanded sealing part. When the extrusion plate squeezes the extrusion plate, the gas in the extrusion part flows to the sealing part, causing the sealing part to expand and seal against the sealing groove.

[0010] By adopting the above technical solution, the compression sealing ring includes a sealing part and an extrusion part, and the sealing part and the extrusion part are respectively arranged in the sealing groove and the extrusion groove. When the closing plate is inserted into the sealing slot, the extrusion plate abuts against the extrusion part at the bottom of the extrusion groove, so that the gas in the extrusion part flows to the sealing part, and the sealing part expands as a whole and seals against the sealing groove, thereby achieving a sealing effect.

[0011] Optionally, an elastic reset mechanism for driving the compression elastic ring to reset is also provided in the box body, the elastic reset mechanism includes a first push rod slidably installed on the side wall of the extrusion groove, a second push rod abutting and cooperating with the first push rod, and an elastic reset member, the side wall of the extrusion plate has a pushing portion for pushing the first push rod, the first push rod has a first inclined surface, the second push rod has a second inclined surface cooperating with the first inclined surface, the second push rod has an abutting surface abutting against the side wall of the sealing portion, and the elastic reset member abuts against the side of the second push rod facing away from the abutting surface.

[0012] By adopting the above technical solution and setting up the elastic reset mechanism, when the closing plate is inserted into or pulled out of the sealing slot, the second push rod can be moved horizontally, the volume of the sealing slot can be changed, the efficiency of the gas in the sealing part flowing back to the extrusion part is improved, and the overall sealing effect is improved. The above elastic reset mechanism has a simple structure and is easy to assemble.

[0013] Optionally, the closing plate further comprises a sealing arc surface for fitting the sealing portion, and the sealing arc surface abuts against a side of the sealing portion away from the sealing groove.

[0014] By adopting the above technical solution and setting the sealing arc surface, after the closing plate is inserted into the sealing slot, the sealing arc surface has a tight fit effect on the top surface of the sealing part, limiting the expansion of the sealing part away from the sealing groove, so that the sealing part as a whole seals the side wall of the sealing groove.

[0015] Optionally, the dust removal mechanism includes a dust removal fan arranged on the box body and a dust removal box for collecting garbage, the top of the box body has an installation chamber for installing the dust removal fan, the two sides of the installation chamber are respectively connected to the sound release channel and the outside world, the outer wall of the box body is slidably provided with a covering plate for covering the installation chamber, and the dust removal box is arranged at the bottom of the box body and corresponds to the dust removal fan.

[0016] By adopting the above technical solution, the structural composition of the dust removal mechanism is disclosed. When it is necessary to clean the dust in the sound release channel, the dust removal fan on the top of the box is started to generate negative pressure in the sound release channel, and the outside air flows to the sound release channel through the first installation chamber. The air flows from top to bottom, and the dust in the sound release channel is blown to the bottom side of the box, and collected by the dust removal box.

[0017] Optionally, an adjustment mechanism for adjusting the internal shape of the sound release channel is further provided in the box, the adjustment mechanism includes a push column connected to the sound release channel and a second driving mechanism that drives the push column to move, the push column is arranged at the corner of two adjacent channels of the sound release channel, and the sound barrier includes a fixed plate, a horizontal moving plate connected to the push column, and a folding and retractable plate arranged on both sides of the horizontal moving plate, and the folding and retractable plate has folding patterns.

[0018] By adopting the above technical solution and setting the adjustment mechanism, when blowing, the second driving mechanism is started, and the pushing column drives the fixed plate to move horizontally, so that the maze-like sound release channel is adjusted and stretched to a relatively vertical channel, so that the cleaning effect when the air flows in the sound release channel is more ideal. Compared with blowing cleaning in the maze-like channel, the above structure shortens the overall cleaning time.

[0019] Optionally, the pushing column and the horizontal moving plate are connected and fixed by a connecting member, a guide member for guiding the folding of the foldable telescopic plate is provided in the box body, the guide member includes a guide plate connected to the output shaft of the second driving member, and the guide plate is limitedly abutted against the outer wall of the foldable telescopic plate.

[0020] By adopting the above technical solution, the connecting piece will fix the pushing column and the horizontal moving plate. When the horizontal moving plate moves horizontally, it will drive the folding and telescopic plates on both sides of the fixed plate to fold and shrink. The setting of the guide piece can play a limiting and guiding role in the shrinkage of the folding and telescopic plates, so that the folding and telescopic plates maintain the same posture after unfolding, thereby ensuring the normal use of the maze speaker.

[0021] Optionally, the box body has a second installation chamber for arranging the dust removal box, the sound release channel has a collecting slot connected to the second installation chamber, the second installation chamber passes through the side wall of the box body and is connected to the outside, and a second covering plate covering the second installation chamber is provided on the outside of the box body.

[0022] By adopting the above technical solution, a connection method between the dust removal box and the box body is disclosed. The dust in the sound release channel is blown into the dust removal box through the collecting slot by the flowing gas generated by the dust removal fan. Under the setting of the second covering plate, the second installation chamber is connected with the outside world. By pulling the second covering plate, the dust removal box can be taken out of the second installation chamber to process dust and impurities.

[0023] Optionally, a plurality of heating tubes are laid on the box body on a side of the first installation chamber facing the sound release channel.

[0024] By adopting the above technical solution, the heating tube is started while dust removal is being performed, and the dust removal fan blows the heat generated by the heating tube to the sound release channel, which can dry out the humid water vapor in the sound release channel and achieve a moisture-proof effect.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: 1. The present application includes a dust-proof mechanism, a first driving mechanism of the dust removal mechanism is connected to the closing plate, and is used to control the opening and closing of the sound release channel. At the same time, the setting of the first sealing structure further improves the sealing performance of the closing plate and the sound box. The setting of the dust removal mechanism can clean a small amount of dust in the sound release channel to ensure the cleanliness of the sound release channel; 2. The present application compresses the sealing ring and the closing plate. When the closing plate is inserted into the sealing slot, the extrusion plate abuts against the extrusion part at the bottom of the extrusion slot, so that the gas in the extrusion part flows to the sealing part, and the sealing part expands as a whole and seals against the sealing slot to achieve a sealing effect; 3. The present application starts the second driving mechanism by setting up the adjustment mechanism, and the pushing column drives the fixed plate to move horizontally, so that the maze-like sound release channel is adjusted and stretched to a relatively vertical channel, thereby making the cleaning effect of the air flowing in the sound release channel more ideal. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0027] Figure 2 It is an overall cross-sectional schematic diagram of an embodiment of the present application.

[0028] Figure 3 It is a cross-sectional schematic diagram of the extrusion portion of the embodiment of the present application in an expanded state.

[0029] Figure 4 yes Figure 2 A local enlarged schematic diagram of point A in the middle.

[0030] Figure 5 It is a schematic diagram of the structure of the adjustment mechanism of the embodiment of the present application.

[0031] Figure 6 It is a schematic diagram of the structure of the guide member of the embodiment of the present application.

[0032] Description of reference numerals: 1. box body; 11. sound release hole; 12. first slide groove; 13. sealing slot; 131. sealing bottom groove; 1311. extrusion groove; 1312. sealing groove; 132. isolation plate; 14. first installation chamber; 15. second installation chamber; 16. first cover plate; 17. second cover plate; 18. heating tube; 2. sound barrier; 21. sound release channel; 211. collecting slot; 22. fixing plate; 23. horizontal shift plate; 24. folding and retracting plate; 3. sound generating assembly; 4. dustproof mechanism; 41. closing plate; 411. extrusion plate; 4111. Pushing part; 412, sealing arc surface; 42, first driving mechanism; 43, compression sealing ring; 431, sealing part; 432, extrusion part; 5, elastic reset mechanism; 51, first push rod; 511, first inclined surface; 52, second push rod; 521, second inclined surface; 53, elastic reset member; 6, dust removal mechanism; 61, dust removal fan; 62, dust removal box; 7, adjustment mechanism; 71, pushing column; 72, second driving mechanism; 73, connecting member; 731, connecting plate; 732, connecting bolt; 74, guide plate; 741, guide fixing plate; 742, guide sliding plate. DETAILED DESCRIPTION

[0033] The following is combined with Figure 1-6 This application is described in further detail.

[0034] The embodiment of the present application discloses a low-frequency portable maze-type speaker.

[0035] Reference Figure 1 A low-frequency portable labyrinth speaker comprises a box body 1, a plurality of sound-blocking panels 2 arranged in the box body 1, a sound-generating component 3 arranged on one side of the top of the box body 1, and a dust-proof mechanism 4 for limiting the entry of dust.

[0036] Reference Figure 1 and Figure 2 The box body 1 is in the shape of a rectangular parallelepiped with a cavity inside, and a plurality of groups of sound-blocking panels 2 form a sound-releasing channel 21 in the box body 1. The sound-releasing channel 21 is bent in an S-shape, and its two ends are respectively connected to the top sound-emitting component 3, and the other end passes through the bottom side wall of the box body 1 and is connected to the outside air. The through hole in the box body 1 corresponding to the end of the sound-releasing channel 21 is defined as the sound-releasing through hole 11. The sound-emitting component 3 is fixedly arranged on the top of the box body 1, and its back side corresponds to one end of the sound-releasing channel 21. The structure of the sound-emitting component 3 is consistent with the sound-emitting unit of the prior art, and is not described in this application.

[0037] The dustproof mechanism 4 includes a closing plate 41 for closing the sound-releasing through hole 11, a first driving mechanism 42 for driving the closing plate 41 to slide, and a first sealing structure for sealing the closing plate 41 and the box body 1. The closing plate 41 is slidably mounted on the outer wall of the box body 1, and the box body 1 has a first slide groove 12 for sliding arrangement of the closing plate 41. The first slide groove 12 is vertically arranged along the height direction and is located at the top of the sound-releasing through hole 11 as a whole. The first driving mechanism 42 is fixedly arranged on the bottom wall of the first slide groove 12. In the embodiment of the present application, the first driving mechanism 42 is an electric push rod. In other embodiments, it can be a mechanical structure for realizing the linear movement of the closing plate 41, such as a cylinder, a motor screw, etc.

[0038] Reference Figure 2 and Figure 3 The sound release through hole 11 is provided with a sealing slot 13 for sealingly inserting the closing plate 41 on the side facing away from the first slide groove 12. The sealing slot 13 is a U-shaped slot with an opening upward, which includes a sealing bottom slot 131 at the bottom and sealing side slots located on both sides of the sealing bottom slot 131. An isolation plate 132 is integrally provided in the sealing slot 13, and the isolation plate 132 separates the sealing bottom slot 131 into an extrusion slot 1311 and a sealing slot 1312 in the horizontal direction. There is a gap between the isolation plate 132 and the bottom wall of the sealing bottom slot 131, so that the extrusion slot 1311 and the sealing slot 1312 are connected to each other.

[0039] Combination Figure 4The first sealing structure includes a compression seal ring 43, and air is pre-filled in the compression seal ring 43 so that the compression seal ring 43 can be deformed. The compression seal ring 43 includes a sealing portion 431 installed in the sealing groove 1312 and an extrusion portion 432 installed in the extrusion groove 1311. The cross-sections of the sealing portion 431 and the sealing insertion slot 13 are adapted to be U-shaped. The extrusion portion 432 and the sealing bottom groove 131 are adapted to be strip-shaped.

[0040] The bottom of the closing plate 41 has an extrusion plate 411 inserted into the extrusion ring, so that the closing plate 41 is an L-shaped plate as a whole. The bottom surface of the extrusion plate 411 is adapted to the top surface of the extrusion portion 432. When the extrusion plate 411 is inserted into the extrusion groove 1311 and pressed against the extrusion portion 432, the continued extension of the extrusion plate 411 can cause the extrusion portion 432 to deform and compress downward, so that the gas inside the extrusion portion 432 is squeezed to the sealing portion 431, and the sealing portion 431 expands in all directions. The sealing portion 431 fills and seals the sealing groove 1312. Among them, the bottom of the closing plate 41 has a sealing arc surface 412 corresponding to the sealing groove 1312. The sealing arc surface 412 covers the top opening of the sealing groove 1312. After the sealing portion 431 expands, the top is attached to the sealing arc surface 412, which limits the upward extension of the sealing portion 431.

[0041] In order to improve the squeezing effect of the compression elastic ring, an elastic reset mechanism 5 is further provided in the box body 1 on one side of the sealing groove 1312. The elastic reset mechanism 5 includes a first push rod 51, a second push rod 52 abutting against the first push rod 51, and an elastic reset member 53.

[0042] The first push rod 51 is slidably installed on the side of the extrusion groove 1311 facing away from the partition plate, and the side wall of the extrusion plate 411 is integrally provided with a pushing portion 4111 for abutting against the top of the first push rod 51. The outer side of the first push rod 51 is also limitedly sleeved with a return spring for return.

[0043] The second push rod 52 is arranged to slide horizontally below the sealing slot 13. The second push rod 52 has an L-shaped cross section in the height direction, and its horizontal part is arranged perpendicular to the first push rod 51. The bottom of the first push rod 51 has a first inclined surface 511, and the horizontal end of the second push rod 52 has a second inclined surface 521 that abuts against the first inclined surface 511. When the first push rod 51 moves downward and the first inclined surface 511 abuts against the second inclined surface 521, the first push rod 51 pushes the second push rod 52 to move horizontally. The vertical part of the second push rod 52 has an abutting surface that abuts against the side wall of the sealing portion 431. The elastic reset member 53 is arranged on the side of the second push rod 52 that is away from the abutting surface. In the embodiment of the present application, the elastic reset member 53 is a spring member.

[0044] Reference Figure 2 and Figure 5The box body 1 is provided with a dust removal mechanism 6 for cleaning dust and impurities in the sound release channel 21, and the dust removal mechanism 6 includes a dust removal fan 61 and a dust removal box 62. The top and bottom of the box body 1 are respectively provided with a first installation chamber 14 and a second installation chamber 15 for installing the dust removal fan 61 and the dust removal box 62, the two installation chambers correspond to each other, and the upper and lower sides of the two chambers are connected to the outside air and the sound release channel 21.

[0045] The top outer wall of the box body 1 is slidably provided with a first cover plate 16 for covering the opening of the first installation chamber 14, and the first cover plate 16 is controlled by an electric linear module. The dust removal fan 61 is a suction fan for sucking the outside air into the sound release channel 21, and conveying it along the sound release channel 21, and blowing out the dust or particulate impurities attached to the inner wall of the sound release channel 21.

[0046] The dust box 62 is a shell with an opening at the top, and the sound release channel 21 has a collection slot 211 corresponding to the top opening of the dust box 62, and the side walls around the collection slot 211 have guide arc surfaces. The bottom of the side wall of the box body 1 is slidably provided with a second covering plate 17 for covering the opening of the second installation chamber 15, and the second covering plate 17 is controlled by an electric linear module.

[0047] In order to improve the dust removal efficiency, an adjustment mechanism 7 for adjusting the shape of the sound release channel 21 is also provided in the box body 1. The adjustment mechanism 7 includes a push column 71 connected to the sound release channel 21 and a second drive mechanism 72 for driving the push column 71 to move horizontally. The shape of the sound release channel 21 is an S-shaped maze, and the push column 71 is located at the inner corner between two adjacent pipes. Among them, the sound barrier 2 includes a fixed plate 22 fixed to the inner wall of the box body 1, a horizontal moving plate 23 connected to the push column 71, and a folding and retractable plate 24 connecting the opposite sides of the horizontal moving plate 23. The folding and retractable plate 24 is a plate with a certain deformation ability, and a folding pattern is provided in the length direction, so that the folding and retractable plate 24 can be folded or unfolded in the horizontal direction.

[0048] The push column 71 and the horizontal moving plate 23 are fixedly connected by a connecting member 73. The connecting member 73 includes a connecting plate 731 and a connecting bolt 732. The connecting plate 731 and the horizontal moving plate 23 are fixedly connected by means of an adhesive or the like, and the end surfaces of both sides of the connecting plate 731 abut against the end of the push column 71 and the outer side surface of the horizontal moving plate 23 respectively, and the push column 71 and the connecting plate 731 are connected by the connecting bolt 732.

[0049] Reference Figure 5 and Figure 6 A guide member for guiding the folding and telescopic plate 24 to fold or unfold is provided in the box body 1, and the guide member includes a guide plate 74 connected to opposite sides of the push column 71. The guide plate 74 is a telescopic plate structure, including a guide fixed plate 741 fixed in the box body 1 and a guide sliding plate 742 slidably arranged in the guide fixed plate 741.

[0050] The box body 1 is also provided with a plurality of heating tubes 18 in the second chamber. The heating tubes 18 are located on the side of the dust removal fan 61 facing the sound release channel 21, so that when the dust removal fan 61 is started, the humid water vapor in the sound release channel 21 is dried at the same time to keep the sound release channel 21 dry and tidy.

[0051] The implementation principle of a low-frequency portable maze speaker in an embodiment of the present application is as follows: when the maze speaker is in daily storage, transportation or not in use outdoors, the extrusion plate 411 of the closing plate 41 is inserted into the extrusion groove 1311, so that the extrusion part 432 is deformed and compressed downward, and the gas in the extrusion part 432 is squeezed into the sealing part 431, and the sealing part 431 expands outward to fill the sealing groove 1312 to achieve sealing.

[0052] When the labyrinth speaker is used, the first driving mechanism 42 is used to drive the closing plate 41 to move upward, and the closing plate 41 is separated from the sealing groove 1312. Under the action of the elastic reset mechanism 5, the gas in the sealing portion 431 flows back to the extrusion portion 432 again, thereby resetting the valve of the compression sealing ring 43 and ensuring the normal use of the sound release channel 21.

[0053] When the interior needs to be cleaned after being used for a period of time, the dust removal mechanism 6 and the adjustment mechanism 7 are started, and the dust removal fan 61 delivers flowing air downward from the top of the box body 1. The adjustment mechanism 7 adjusts the sound release channel 21 to be a vertical pipe. The dust and impurities in the sound release channel 21 eventually fall into the dust removal box 62 under the flow of air. By opening the second cover plate 17, the dust removal box 62 can be taken out of the box body 1 for processing.

[0054] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A low-frequency portable labyrinth speaker, comprising a box (1), a plurality of groups of sound-blocking panels (2) and a sound-generating component (3) arranged in the box (1), wherein the sound-blocking panels (2) form a sound-releasing channel (21) in the box (1), one end of the sound-releasing channel (21) is connected to the back of the sound-generating component (3), and the other end of the sound-releasing channel (21) passes through the side wall of the box (1) and is connected to the outside, characterized in that: The housing (1) is provided with a dust prevention mechanism (4) for limiting the entry of dust and a dust removal mechanism (6) for cleaning pollutants inside the sound release channel (21) at the end of the sound release channel (21); the dust prevention mechanism (4) comprises a closing plate (41) for closing the sound release channel (21), a first driving mechanism (42) for driving the closing plate (41) to move, and a first sealing structure for sealing the closing plate (41) and the housing (1).

2. A low-frequency portable labyrinth speaker according to claim 1, characterized in that: The closing plate (41) is slidably arranged on the box body (1); the box body (1) has a first slide groove (12) for arranging the closing plate (41); the first driving mechanism (42) is arranged on one side of the first slide groove (12); the box body (1) has a sealing slot (13) for inserting the closing plate (41); and the first sealing structure is arranged in the sealing slot (13).

3. A low-frequency portable labyrinth speaker according to claim 2, characterized in that: The first sealing structure comprises a compression sealing ring (43) arranged in the sealing slot (13); an isolation plate (132) is arranged in the sealing slot (13); the isolation plate (132) separates the sealing slot (13) into an extrusion groove (1311) and a sealing groove (1312); the extrusion groove (1311) and the sealing groove (1312) are in communication; The compression seal ring (43) comprises a sealing portion (431) arranged in the sealing groove (1312) and an extrusion portion (432) arranged in the extrusion groove (1311); the closing plate (41) comprises an extrusion plate (411) for inserting into the extrusion groove (1311) and extruding the extrusion portion (432); when the extrusion plate (411) extrudes the extrusion plate (411), the gas in the extrusion portion (432) flows toward the sealing portion (431), causing the sealing portion (431) to expand and seal against the sealing groove (1312).

4. A low-frequency portable labyrinth speaker according to claim 3, characterized in that: The box body (1) is also provided with an elastic reset mechanism (5) for driving the compressed elastic ring to reset. The elastic reset mechanism (5) comprises a first push rod (51) slidably mounted on the side wall of the extrusion groove (1311), a second push rod (52) abutting and cooperating with the first push rod (51), and an elastic reset member (53). The side wall of the extrusion plate (411) has a pushing portion (4111) for pushing the first push rod (51). The first push rod (51) has a first inclined surface (511). The second push rod (52) has a second inclined surface (521) cooperating with the first inclined surface (511). The second push rod (52) has an abutting surface abutting against the side wall of the sealing portion (431). The elastic reset member (53) abuts against the side of the second push rod (52) facing away from the abutting surface.

5. A low-frequency portable labyrinth speaker according to claim 3, characterized in that: The closing plate (41) also has a sealing arc surface (412) for fitting with the sealing portion (431), and the sealing arc surface (412) abuts against a side of the sealing portion (431) away from the sealing groove (1312).

6. A low-frequency portable labyrinth speaker according to claim 1, characterized in that: The dust removal mechanism (6) comprises a dust removal fan (61) arranged on the box body (1) and a dust removal box (62) for collecting garbage. The top of the box body (1) has an installation chamber for installing the dust removal fan (61). Both sides of the installation chamber are connected to the sound release channel (21) and the outside respectively. The outer wall of the box body (1) is slidably provided with a covering plate for covering the installation chamber. The dust removal box (62) is arranged at the bottom of the box body (1) and corresponds to the dust removal fan (61).

7. A low-frequency portable labyrinth speaker according to claim 6, characterized in that: The box body (1) is also provided with an adjustment mechanism (7) for adjusting the internal shape of the sound release channel (21), the adjustment mechanism (7) comprising a push column (71) connected to the sound release channel (21) and a second drive mechanism (72) for driving the push column (71) to move, the push column (71) being arranged at the corner of two adjacent channels of the sound release channel (21), the sound barrier (2) comprising a fixed plate (22), a horizontal moving plate (23) connected to the push column (71), and folding and retractable plates (24) arranged on both sides of the horizontal moving plate (23), the folding and retractable plates (24) having folding patterns.

8. A low-frequency portable labyrinth speaker according to claim 7, characterized in that: The pushing column (71) and the horizontal moving plate (23) are connected and fixed via a connecting member (73); a guide member for guiding the folding of the foldable telescopic plate (24) is arranged in the box body (1); the guide member comprises a guide plate (74) connected to the output shaft of the second driving member; the guide plate (74) is limitedly abutted against the outer wall of the foldable telescopic plate (24).

9. A low-frequency portable labyrinth speaker according to claim 7, characterized in that: The box body (1) has a second installation chamber (15) for arranging the dust removal box (62), the sound release channel (21) has a collection slot (211) connected to the second installation chamber (15), the second installation chamber (15) passes through the side wall of the box body (1) and is connected to the outside, and a second covering plate (17) covering the second installation chamber (15) is arranged on the outside of the box body (1).

10. A low-frequency portable labyrinth speaker according to claim 1, characterized in that: The box body (1) is provided with a plurality of heating tubes (18) on a side of the first installation chamber (14) facing the sound emission channel (21).

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