Bluetooth lossless music player

Abstract

The present invention relates to the technical field of music players and discloses a Bluetooth lossless music player, which solves the problem of poor dustproof and heat dissipation effects of existing Bluetooth lossless music players. The Bluetooth lossless music player comprises a shell, a plurality of cooling fans are fixedly arranged at the bottom end of a second support frame, an air inlet is provided at one end of the bottom of the shell, a detachable filter plate is provided at the top end of the inside of the air inlet, a lifting cover plate is provided at the top end of the inside of the air inlet, an air outlet is provided at one end of the top of the shell, a rotating cover plate is provided inside the air outlet, a sound amplification port matching the speaker is provided at one end of the shell near the speaker, a flexible sealing curtain is provided on the outside of the inside of the sound amplification port, and the flexible sealing curtain, the lifting cover plate and the rotating cover plate are all connected by a combined adjustment mechanism; the Bluetooth lossless music player can improve the overall dustproof and heat dissipation effects, and effectively improve the use effect and service life.

Description

Technical Field

[0001] The present invention belongs to the technical field of music players, in particular to a Bluetooth lossless music player. Background Art

[0002] Although there are many types and quantities of music players, existing music players still have certain problems, especially music players that are fixedly installed indoors, such as music classrooms, concert halls, and music players inside cinemas, which have some disadvantages during use.

[0003] During use, existing music players that are fixedly installed indoors are generally not easy to protect the speakers from dust. The interior of the speakers is easily clogged with dust, affecting the sound quality, which greatly limits the use of the music players. At the same time, the existing music players have poor heat dissipation effects, and the heat dissipation air inlets and outlets are also prone to dust intrusion, affecting the service life of the internal electronic components. Summary of the Invention

[0004] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a Bluetooth lossless music player, which effectively solves the problems of poor dustproof and heat dissipation effects of the existing Bluetooth lossless music players.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a Bluetooth lossless music player, comprising a housing, a mounting bracket fixedly provided at a middle position at the top end of the housing, a speaker provided at one end inside the housing, the speaker fixedly connected to the inner side wall of the housing via a first support frame, a main control module, a Bluetooth module, and a power module provided in sequence at the other end inside the housing, the main control module, the Bluetooth module, and the power module all fixedly connected to the inner side wall of the housing via a second support frame, a plurality of cooling fans fixedly provided at the bottom end inside the second support frame, an air inlet provided at one end of the bottom of the housing, a removable filter plate provided at the top end inside the air inlet, a lifting cover plate provided at the top end inside the air inlet, a wiring board fixedly provided at one end of the housing away from the speaker, an air outlet provided at one end of the top of the housing, a rotating cover plate provided inside the air outlet, a sound amplification port matching the speaker provided at one end of the housing near the speaker, protective grids fixedly provided inside the sound amplification port and the air outlet, a flexible sealing curtain provided on the outside of the sound amplification port, and the flexible sealing curtain, the lifting cover plate, and the rotating cover plate all being connected by a combined adjustment mechanism.

[0006] Preferably, the combined adjustment mechanism is composed of a dual-axis servo motor, a lifting adjustment component, a rotation adjustment component, a curtain expansion adjustment component and a curtain reset adjustment component. The dual-axis servo motor is fixedly connected to the inside of the shell, the lifting adjustment component is connected between the dual-axis servo motor and the lifting cover plate, the rotation adjustment component is connected between the dual-axis servo motor and the rotary cover plate, the curtain expansion adjustment component is connected between the flexible sealing curtain and the lifting adjustment component, and the curtain reset adjustment component is connected between the flexible sealing curtain and the rotation adjustment component.

[0007] Preferably, the lifting and lowering adjustment component is composed of a rotating shaft 1, a driving gear, a driven gear ring, a screw sleeve and a lifting screw. The rotating shaft 1 is fixedly connected to the output shaft of the dual-axis servo motor, the driving gear is fixedly connected to the bottom end of the rotating shaft 1, the driven gear ring is fixedly connected to the top of the screw sleeve and meshes with the driving gear, the lifting screw is inserted into the driven gear ring and the screw sleeve, and the lifting screw and the driven gear ring have a non-contact structure. The rotating shaft 1 is connected to the inner wall of the shell through a limiting sleeve 1, and the screw sleeve is connected to the inner wall of the shell through a limiting sleeve 2. The bottom end of the lifting screw is fixedly connected to the lifting cover plate, and the other end of the top of the lifting cover plate is provided with a limiting guide rod inserted into the shell.

[0008] Preferably, the rotation adjustment assembly consists of a second rotating shaft, a worm, a worm wheel, a main gear, a double-sided rack and a sub-gear. The second rotating shaft is fixedly connected to the output shaft of the dual-axis servo motor, the worm is fixedly connected to the top of the second rotating shaft, the worm wheel is fixedly connected to the front of the main gear and meshes with the worm, the worm wheel and the main gear are connected to the inner wall of the shell through the movable rotating shaft one, the double-sided rack is located between the main gear and the sub-gear and meshes with the main gear and the sub-gear respectively, the rotary cover plate is connected to the shell through the movable rotating shaft two, and the sub-gear is fixedly connected to one end of the movable rotating shaft two.

[0009] Preferably, the curtain unfolding adjustment assembly is composed of a bevel gear 1, a bevel gear 2, a pulley 1, several guide wheels 1 and a traction rope 1, the bevel gear 1 is fixedly connected to the rotating shaft 1, the bevel gear 2 is meshed with the bevel gear 1, the pulley 1 is fixedly connected to the bevel gear 2, a limiting beam is fixedly provided at the bottom end of the flexible sealing curtain, and the traction rope 1 is connected between the pulley 1, the guide wheel 1 and the limiting beam.

[0010] Preferably, the curtain reset adjustment assembly is composed of bevel gear three, bevel gear four, pulley two, several guide wheels two, traction rope two, pulley three and a winding roller, bevel gear three is fixedly connected to rotating shaft two, bevel gear four is meshed with bevel gear three, pulley two is fixedly connected to one side of bevel gear four, pulley three is fixedly connected to one end of the winding roller, traction rope two is connected between pulley two, guide wheel two and pulley three, and the winding roller is connected to the flexible sealing curtain.

[0011] Preferably, a first strip-shaped limiting sliding groove matching the double-sided rack is provided at the top of the interior of the shell, and a second strip-shaped limiting sliding groove matching the limiting beam is provided on both sides of the interior of the sound expansion port.

[0012] Preferably, an elliptical clamping plate is provided in the middle position of the top end of the lifting sealing plate, a handwheel matching the elliptical clamping plate is provided in the middle position of the bottom end of the lifting sealing plate, a rotating disk matching the elliptical clamping plate is movably provided in the middle position of the bottom end of the detachable filter plate, and both ends of the detachable filter plate are provided with a pin matching the shell, the pin is connected to the detachable filter plate by a limit spring, and the pin is connected to the rotating disk by a pull rope.

[0013] Preferably, arc-shaped limiting plates and limiting protrusions matching the elliptical clamping plates are provided on both sides of the interior of the rotating disk, and the arc-shaped limiting plates and limiting protrusions are an integrated structure with the rotating disk.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] (1) During operation, the music player is provided with a lifting cover plate, a rotating cover plate, a flexible sealing curtain, and a combined adjustment mechanism consisting of a dual-axis servo motor, a lifting adjustment component, a rotating adjustment component, a curtain expansion adjustment component, and a curtain reset adjustment component. The air inlet and outlet and the sound amplification port of the music player can be sealed when the music player is not in use, thereby preventing dust from entering the interior of the music player and affecting its performance and service life;

[0016] (2) By providing a detachable filter plate, a dust removal effect can be achieved when the music player is in use and dissipating heat, thereby preventing dust from entering the interior of the music player. By providing an elliptical card plate, a hand wheel, a rotating disk, a latch, a limit spring and a pull rope, the detachable filter plate can be quickly installed and removed using a lifting cover plate, thereby improving the convenience of cleaning and replacing the detachable filter plate. By providing a cooling fan, an air inlet and an air outlet, the main control module, the Bluetooth module and the power module can be cooled when the music player is in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0018] In the attached figure:

[0019] Figure 1 This is a schematic diagram of the structure of the Bluetooth lossless music player of the present invention;

[0020] Figure 2 This is a schematic diagram of the internal structure of the Bluetooth lossless music player of the present invention;

[0021] Figure 3 This is the second schematic diagram of the internal structure of the Bluetooth lossless music player of the present invention;

[0022] Figure 4 This is a schematic structural diagram of the combined adjustment mechanism of the present invention;

[0023] Figure 5 This is a schematic diagram of the shell structure of the present invention;

[0024] Figure 6 This is a schematic diagram of the connection structure between the detachable filter plate and the lifting cover plate of the present invention;

[0025] Figure 7 This is a schematic diagram of the structure of the rotating disk of the present invention;

[0026] In the figure: 1. Shell; 2. Mounting frame; 3. Speaker; 4. Main control module; 5. Bluetooth module; 6. Power module; 7. Cooling fan; 8. Air inlet; 9. Removable filter plate; 10. Lifting cover plate; 11. Terminal block; 12. Air outlet; 13. Rotating cover plate; 14. Sound amplification port; 15. Protective grid; 16. Flexible sealing curtain; 17. Combined adjustment mechanism; 18. Dual-axis servo motor; 19. Lifting adjustment assembly; 20. Rotating adjustment assembly; 21. Curtain expansion adjustment assembly; 22. Curtain reset adjustment assembly; 23. Rotating shaft 1; 24. Driving gear; 25. Driven gear ring; 26. Screw sleeve; 27. Lifting screw; 28. Limit guide rod; 29, rotating shaft 2; 30, worm; 31, worm wheel; 32, main gear; 33, double-sided rack; 34, sub-gear; 35, bevel gear 1; 36, bevel gear 2; 37, pulley 1; 38, guide wheel 1; 39, traction rope 1; 40, limiting beam; 41, bevel gear 3; 42, bevel gear 4; 43, pulley 2; 44, guide wheel 2; 45, traction rope 2; 46, pulley 3; 47, winding roller; 48, strip-shaped limiting slide 1; 49, strip-shaped limiting slide 2; 50, elliptical clamping plate; 51, handwheel; 52, rotating disk; 53, latch; 54, limiting spring; 55, pull rope; 56, arc-shaped limiting plate; 57, limiting protrusion. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0028] Embodiment 1, by Figures 1 to 6The present invention provides a Bluetooth lossless music player comprising a shell 1, a mounting bracket 2 is fixedly provided at the middle position of the top of the shell 1, a speaker 3 is provided at one end inside the shell 1, and the speaker 3 is fixedly connected to the inner wall of the shell 1 through a support frame 1, and a main control module 4, a Bluetooth module 5 and a power module 6 are sequentially provided at the other end inside the shell 1, and the main control module 4, the Bluetooth module 5 and the power module 6 are all fixedly connected to the inner wall of the shell 1 through a support frame 2, and a plurality of cooling fans 7 are fixedly provided at the bottom end inside the support frame 2, an air inlet 8 is provided at one end of the bottom of the shell 1, a detachable filter plate 9 is provided at the top inside the air inlet 8, and a lifting cover plate 10 is provided at the top inside the air inlet 8, a terminal board 11 is fixedly provided at the end of the shell 1 away from the speaker 3, an air outlet 12 is provided at one end of the top of the shell 1, a rotating cover plate 13 is provided inside the air outlet 12, and a rotary cover plate 13 is provided at the end of the shell 1 close to the speaker 3 A matching sound expansion port 14 is provided. A protective grid 15 is fixedly provided inside the sound expansion port 14 and the air outlet 12. A flexible sealing curtain 16 is provided on the outside of the sound expansion port 14. The flexible sealing curtain 16, the lifting cover plate 10 and the rotating cover plate 13 are all connected by a combined adjustment mechanism 17. The combined adjustment mechanism 17 is composed of a dual-axis servo motor 18, a lifting adjustment component 19, a rotation adjustment component 20, a curtain expansion adjustment component 21 and a curtain reset adjustment component 22. The dual-axis servo motor 18 is fixedly connected to the inside of the housing 1. The lifting adjustment component 19 is connected between the dual-axis servo motor 18 and the lifting cover plate 10. The rotation adjustment component 20 is connected between the dual-axis servo motor 18 and the rotating cover plate 13. The curtain expansion adjustment component 21 is connected between the flexible sealing curtain 16 and the lifting adjustment component 19. The curtain reset adjustment component 22 is connected between the flexible sealing curtain 16 and the rotation adjustment component 20.

[0029] When the Bluetooth lossless music player is in normal use, air intake and exhaust are achieved through the air inlet 8 and the air outlet 12, and the cooling fan 7 can accelerate the air flow, so that the main control module 4, the Bluetooth module 5 and the power module 6 can be quickly cooled. The incoming air is filtered by the detachable filter plate 9 to prevent dust from entering the inside of the shell 1 through the air inlet 8. When the Bluetooth lossless music player is in normal use, the lifting cover plate 10, the rotating cover plate 13 and the flexible sealing curtain 16 are synchronously driven to open through the combined adjustment mechanism 17. When the Bluetooth lossless music player is not in use, the lifting cover plate 10, the rotating cover plate 13 and the flexible sealing curtain 16 are synchronously driven to close through the combined adjustment mechanism 17 to improve the overall sealing effect.

[0030] Example 2: Figures 1 to 6It is given that the lifting and adjusting component 19 is composed of a rotating shaft 23, a driving gear 24, a driven gear ring 25, a screw sleeve 26 and a lifting screw 27. The rotating shaft 23 is fixedly connected to the output shaft of the dual-axis servo motor 18, the driving gear 24 is fixedly connected to the bottom end of the rotating shaft 23, the driven gear ring 25 is fixedly connected to the top of the screw sleeve 26 and meshes with the driving gear 24, the lifting screw 27 is inserted into the driven gear ring 25 and the screw sleeve 26, and the lifting screw 27 and the driven gear ring 25 have a non-contact structure. The rotating shaft 23 is connected to the inner wall of the shell 1 through a limiting shaft sleeve 1, and the screw sleeve 26 is connected to the inner wall of the shell 1 through a limiting shaft sleeve 2. The bottom end of the lifting screw 27 is fixedly connected to the lifting cover plate 10, and the other end of the top of the lifting cover plate 10 is provided with a limiting guide rod 28 inserted into the shell 1;

[0031] When the lifting adjustment component 19 adjusts the lifting cover plate 10, the dual-axis servo motor 18 drives the rotating shaft 23 to rotate, the rotating shaft 23 drives the driving gear 24 to rotate, and the driving gear 24 drives the driven gear ring 25 and the screw sleeve 26 to rotate synchronously. Since the position of the screw sleeve 26 is fixed, it moves relative to the lifting screw 27 during the rotation of the screw sleeve 26, so that the lifting screw 27 rises or falls along the screw sleeve 26, thereby driving the lifting cover plate 10 to rise or fall, thereby opening and closing the air inlet 8. The lifting cover plate 10 can be vertically limited by the limiting guide rod 28 to improve the stability of the movement.

[0032] Example 3: Figures 1 to 5 It is given that the rotation adjustment assembly 20 is composed of a second rotating shaft 29, a worm 30, a worm wheel 31, a main gear 32, a double-sided rack 33 and a sub-gear 34. The second rotating shaft 29 is fixedly connected to the output shaft of the dual-axis servo motor 18, the worm 30 is fixedly connected to the top of the second rotating shaft 29, the worm wheel 31 is fixedly connected to the front of the main gear 32 and meshes with the worm 30, the worm wheel 31 and the main gear 32 are connected to the inner wall of the housing 1 through the movable rotating shaft 1, the double-sided rack 33 is located between the main gear 32 and the sub-gear 34 and meshes with the main gear 32 and the sub-gear 34 respectively, the rotary cover plate 13 is connected to the housing 1 through the movable rotating shaft 2, and the sub-gear 34 is fixedly connected to one end of the movable rotating shaft 2;

[0033] When the rotary adjustment component 20 adjusts the rotary cover plate 13, the dual-axis servo motor 18 drives the second rotating shaft 29 to rotate, and the second rotating shaft 29 drives the worm 30 to rotate. The worm 30 drives the worm wheel 31 and the main gear 32 to rotate synchronously, and the main gear 32 drives the double-sided rack 33 to move, and the double-sided rack 33 drives the sub-gear 34 to rotate, and the sub-gear 34 drives the rotary cover plate 13 to rotate, so that the air outlet 12 can be opened and closed, and the sealing effect of the air outlet is improved. Since the worm wheel 31 cannot drive the worm 30 to rotate, the worm 30 and the worm wheel 31 can achieve self-locking of the entire combined adjustment mechanism 17 to prevent the components from moving on their own and improve the overall stability.

[0034] Embodiment 4, by Figures 1 to 5 The curtain expansion adjustment assembly 21 is given, and is composed of a bevel gear 35, a bevel gear 36, a pulley 37, a plurality of guide wheels 38 and a traction rope 39. The bevel gear 35 is fixedly connected to the rotating shaft 23, the bevel gear 36 is meshed with the bevel gear 35, and the pulley 37 is fixedly connected to the bevel gear 2 36. The bottom end of the flexible sealing curtain 16 is fixedly provided with a limit beam 40, and the traction rope 39 is connected between the pulley 37, the guide wheel 38 and the limit beam 40. The curtain reset adjustment assembly 22 is composed of a bevel gear 3 41, a bevel gear 42, a pulley 2 43, a plurality of guide wheels 2 44, a traction rope 2 45 , rope pulley three 46 and winding roller 47, bevel gear three 41 is fixedly connected to rotating shaft two 29, bevel gear four 42 is meshed with bevel gear three 41, rope pulley two 43 is fixedly connected to one side of bevel gear four 42, rope pulley three 46 is fixedly connected to one end of winding roller 47, traction rope two 45 is connected between rope pulley two 43, guide wheel two 44 and rope pulley three 46, winding roller 47 is connected to flexible sealing curtain 16, the top of the interior of shell 1 is provided with strip limiting slide groove one 48 matching with double-sided rack 33, and strip limiting slide groove two 49 matching with limiting beam 40 are provided on both sides of the interior of sound expansion port 14;

[0035] When the curtain expansion adjustment component 21 opens the flexible sealing curtain 16, the rotating shaft 1 23 synchronously drives the bevel gear 1 35 to rotate, the bevel gear 1 35 drives the bevel gear 2 36 to rotate, and the bevel gear 2 36 drives the pulley 1 37 to rotate, and the traction rope 1 39 is wound through the pulley 1 37, and the traction rope 1 39 pulls the flexible sealing curtain 16 from the winding roller 47 to release it, and the sound expansion port 14 is closed by the flexible sealing curtain 16. At the same time, the curtain reset adjustment component 22 releases the flexible sealing curtain 16 through the winding roller 47, the rotating shaft 2 29 drives the bevel gear 4 42 to reverse, the bevel gear 42 drives the pulley 2 43 to reverse, and the pulley 2 43 releases the traction rope 2 45, thereby releasing the restriction on the winding roller 47, and realizing the release of the flexible sealing curtain 16. If the flexible sealing curtain 16 needs to be reset, the dual-axis servo motor 18 is reversed to drive the entire component to move in the opposite direction.

[0036] Embodiment 5, by Figure 1 、 Figure 4 、 Figure 6 and Figure 7 It is given that an elliptical card plate 50 is provided in the middle position of the top of the lifting and sealing cover plate 10, and a handwheel 51 matching the elliptical card plate 50 is provided in the middle position of the bottom end of the lifting and sealing cover plate 10. A rotating disk 52 matching the elliptical card plate 50 is movably provided in the middle position of the bottom end of the detachable filter plate 9. Both ends of the interior of the detachable filter plate 9 are provided with card pins 53 matching the housing 1. The card pin 53 and the detachable filter plate 9 are connected by a limit spring 54. The card pin 53 and the rotating disk 52 are connected by a pull rope 55. Both sides of the interior of the rotating disk 52 are provided with arc-shaped limit plates 56 and limit protrusions 57 matching the elliptical card plate 50. The arc-shaped limit plates 56 and the limit protrusions 57 are integrated with the rotating disk 52.

[0037] When there is a lot of dust inside the detachable filter plate 9 and it needs to be cleaned or replaced, when the lifting cover plate 10 is in the closed state, the hand wheel 51 is turned by hand to drive the elliptical card plate 50 to rotate, and the elliptical card plate 50 is rotated to the position of the arc-shaped limit plate 56 and the limit protrusion 57. The arc-shaped limit plate 56 and the limit protrusion 57 are used to limit the elliptical card plate 50 vertically and horizontally respectively. The elliptical card plate 50 is continued to be rotated, thereby driving the rotating disk 52 to rotate. The rotating disk 52 pulls the pull rope 55, and the pull rope 55 drives the latch pin 53 to retract, releasing the limit on the detachable filter plate 9, and driving the detachable filter plate 9 to move downward during the descending process of the lifting cover plate 10, and then the detachable filter plate 9 can be manually taken out.

[0038] During operation, the music player is equipped with a lifting cover plate, a rotating cover plate, a flexible sealing curtain and a combined adjustment mechanism composed of a dual-axis servo motor, a lifting adjustment component, a rotating adjustment component, a curtain expansion adjustment component and a curtain reset adjustment component. The air inlet and exhaust vents and the sound amplification port of the music player can be closed when the music player is not in use, thereby preventing dust from entering the interior of the music player and affecting its use effect and service life; the detachable filter plate can achieve a dust removal effect when the music player is in use and dissipates heat, thereby preventing dust from entering the interior of the music player; the elliptical card plate, hand wheel, rotating disk, pin, limit spring and pull rope can be used to quickly install and disassemble the detachable filter plate using the lifting cover plate, thereby improving the convenience of cleaning and replacing the detachable filter plate; the cooling fan, air inlet and air outlet can be provided, so that the main control module, Bluetooth module and power module can be cooled when the music player is in use.

Claims

1. A Bluetooth lossless music player, comprising a housing (1), characterized in that: A mounting frame (2) is fixedly provided at the middle position of the top of the shell (1), a speaker (3) is provided at one end inside the shell (1), and the speaker (3) is fixedly connected to the inner wall of the shell (1) through the first support frame. A main control module (4), a Bluetooth module (5) and a power module (6) are sequentially provided at the other end inside the shell (1), and the main control module (4), the Bluetooth module (5) and the power module (6) are all fixedly connected to the inner wall of the shell (1) through the second support frame. A plurality of cooling fans (7) are fixedly provided at the bottom end of the second support frame. An air inlet (8) is provided at one end of the bottom of the shell (1), and a detachable filter plate (9) is provided at the top of the air inlet (8). A lifting cover plate (10) is provided at the top, a terminal board (11) is fixedly provided at one end of the shell (1) away from the speaker (3), an air outlet (12) is provided at one end of the top of the shell (1), a rotating cover plate (13) is provided inside the air outlet (12), a sound amplification port (14) matching the speaker (3) is provided at one end of the shell (1) close to the speaker (3), a protective grid (15) is fixedly provided inside the sound amplification port (14) and the air outlet (12), a flexible sealing curtain (16) is provided on the outside of the inside of the sound amplification port (14), and the flexible sealing curtain (16), the lifting cover plate (10) and the rotating cover plate (13) are all connected in coordination via a combined adjustment mechanism (17); The combined adjustment mechanism (17) is composed of a dual-axis servo motor (18), a lifting adjustment component (19), a rotation adjustment component (20), a curtain expansion adjustment component (21) and a curtain reset adjustment component (22), wherein the dual-axis servo motor (18) is fixedly connected to the interior of the housing (1), the lifting adjustment component (19) is connected between the dual-axis servo motor (18) and the lifting cover plate (10), the rotation adjustment component (20) is connected between the dual-axis servo motor (18) and the rotary cover plate (13), the curtain expansion adjustment component (21) is connected between the flexible sealing curtain (16) and the lifting adjustment component (19), and the curtain reset adjustment component (22) is connected between the flexible sealing curtain (16) and the rotation adjustment component (20); When the Bluetooth lossless music player is in normal use, the combined adjustment mechanism (17) synchronously drives the lifting cover plate (10), the rotating cover plate (13) and the flexible sealing curtain (16) to open; when the Bluetooth lossless music player is not in use, the combined adjustment mechanism (17) synchronously drives the lifting cover plate (10), the rotating cover plate (13) and the flexible sealing curtain (16) to close.

2. The Bluetooth lossless music player according to claim 1, characterized in that: The lifting adjustment assembly (19) is composed of a rotating shaft (23), a driving gear (24), a driven gear ring (25), a screw sleeve (26) and a lifting screw (27). The rotating shaft (23) is fixedly connected to the output shaft of the dual-axis servo motor (18), the driving gear (24) is fixedly connected to the bottom end of the rotating shaft (23), the driven gear ring (25) is fixedly connected to the top end of the screw sleeve (26) and meshes with the driving gear (24), and the lifting screw (27) is inserted into the driven gear ring (25). The gear ring (25) and the screw sleeve (26), the lifting screw (27) and the driven gear ring (25) are non-contact structures, the rotating shaft (23) is connected to the inner wall of the shell (1) through the limiting shaft sleeve (1), the screw sleeve (26) is connected to the inner wall of the shell (1) through the limiting shaft sleeve (2), the bottom end of the lifting screw (27) is fixedly connected to the lifting cover plate (10), and the other end of the top of the lifting cover plate (10) is provided with a limiting guide rod (28) inserted into the shell (1).

3. The Bluetooth lossless music player according to claim 2, characterized in that: The rotation adjustment assembly (20) is composed of a second rotating shaft (29), a worm (30), a worm wheel (31), a main gear (32), a double-sided rack (33) and a sub-gear (34). The second rotating shaft (29) is fixedly connected to the output shaft of the double-axis servo motor (18). The worm (30) is fixedly connected to the top of the second rotating shaft (29). The worm wheel (31) is fixedly connected to the front of the main gear (32) and meshes with the worm (30). The worm wheel (31) and the main gear (32) are connected to the inner wall of the housing (1) through the movable rotating shaft (1). The double-sided rack (33) is located between the main gear (32) and the sub-gear (34) and meshes with the main gear (32) and the sub-gear (34) respectively. The rotary cover plate (13) is connected to the housing (1) through the movable rotating shaft (2). The sub-gear (34) is fixedly connected to one end of the movable rotating shaft (2).

4. The Bluetooth lossless music player according to claim 3, characterized in that: The curtain unfolding adjustment assembly (21) is composed of a bevel gear 1 (35), a bevel gear 2 (36), a rope pulley 1 (37), a plurality of guide wheels 1 (38) and a traction rope 1 (39). The bevel gear 1 (35) is fixedly connected to the rotating shaft 1 (23), the bevel gear 2 (36) is meshed with the bevel gear 1 (35), the rope pulley 1 (37) is fixedly connected to the bevel gear 2 (36), a limit beam (40) is fixedly provided at the bottom end of the flexible sealing curtain (16), and the traction rope 1 (39) is connected between the rope pulley 1 (37), the guide wheel 1 (38) and the limit beam (40).

5. The Bluetooth lossless music player according to claim 4, characterized in that: The curtain reset adjustment assembly (22) is composed of a bevel gear three (41), a bevel gear four (42), a rope wheel two (43), a plurality of guide wheels two (44), a traction rope two (45), a rope wheel three (46) and a winding roller (47), wherein the bevel gear three (41) is fixedly connected to the rotating shaft two (29), the bevel gear four (42) is meshed with the bevel gear three (41), the rope wheel two (43) is fixedly connected to one side of the bevel gear four (42), the rope wheel three (46) is fixedly connected to one end of the winding roller (47), the traction rope two (45) is connected between the rope wheel two (43), the guide wheel two (44) and the rope wheel three (46), and the winding roller (47) is connected to the flexible sealing curtain (16).

6. The Bluetooth lossless music player according to claim 4, characterized in that: The top end of the shell (1) is provided with a first strip-shaped limiting slide groove (48) matching the double-sided rack (33), and both sides of the sound expansion port (14) are provided with a second strip-shaped limiting slide groove (49) matching the limiting beam (40).

7. The Bluetooth lossless music player according to claim 1, characterized in that: An elliptical card plate (50) is provided at the middle position of the top of the lifting cover plate (10), a hand wheel (51) matching the elliptical card plate (50) is provided at the middle position of the bottom of the lifting cover plate (10), a rotating disk (52) matching the elliptical card plate (50) is movably provided at the middle position of the bottom end of the detachable filter plate (9), and a card pin (53) matching the housing (1) is provided at both ends of the detachable filter plate (9), the card pin (53) and the detachable filter plate (9) are connected by a limit spring (54), and the card pin (53) and the rotating disk (52) are connected by a pull rope (55).

8. The Bluetooth lossless music player according to claim 7, characterized in that: Both sides of the rotating disk (52) are provided with arc-shaped limiting plates (56) and limiting protrusions (57) that match the elliptical clamping plate (50). The arc-shaped limiting plates (56) and the limiting protrusions (57) are an integrated structure with the rotating disk (52).

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