Sound cloth covering device

CN224746662UActive Publication Date: 2026-09-11GUANGDONG HEYUNDA TECHNOLOGY CO LTD
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Patent Information

Application Number
CN202522060490.0
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-09-25
Publication Date
2026-09-11
Estimated Expiration
2035-09-25

AI Technical Summary

Technical Problem

[0003]目前,市面上针对音响腔体的套布作业,其实现方式较为传统,纯手工操作方式对操作人员的熟练度要求较高,生产效率低下,且操作过程中难以保证每一个音响腔体套布的一致性,容易出现网布套设位置偏移、纹理紊乱等质量问题,严重影响产品的标准化生产

Benefits of technology

[0015]综上所述,本实用新型至少具有以下有益之处:

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Abstract

The utility model relates to a sound box processing technical field discloses a kind of sound cloth covering device, comprising: cabinet, the first opening is equipped in cabinet top, lifting mechanism is equipped in cabinet, the drive end of lifting mechanism is equipped with sound positioning seat, and sound positioning seat extends first opening;And outer support mechanism, installation is in cabinet top, outer support mechanism includes outer support platform and several outer support cylinders, the middle position of outer support platform is equipped with second opening, second opening is coaxially arranged with first opening, several outer support cylinders are distributed and set around cloth covering mouth, the drive end of outer support cylinder is equipped with outer support piece, and outer support piece is used to cover net cloth;Wherein, several outer support cylinders are used to drive outer support piece and open net cloth, lifting mechanism is used to drive sound positioning seat and rise to second opening.The utility model's sound cloth covering device lifting mechanism cooperates outer support mechanism and realizes the function of automatic sound cloth covering, to ensure the consistency of product quality.
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Description

Technical Field

[0001] This utility model belongs to the field of speaker processing technology, specifically relating to a speaker mesh covering device. Background Technology

[0002] In the design and manufacturing of audio products, to meet design requirements such as aesthetic appearance, sound quality optimization, and protection of internal components, it is usually necessary to cover the speaker enclosure with fabric. Covering the speaker enclosure not only enhances the overall visual quality of the audio product, making it more in line with modern consumers' aesthetic demands for the integration of home décor and electronic products, but also reduces the entry of external dust and impurities into the speaker to a certain extent, thus protecting core components such as the speaker.

[0003] Currently, the fabric covering process for speaker enclosures is carried out in a relatively traditional way. The purely manual operation requires a high level of skill from the operators, resulting in low production efficiency. Furthermore, it is difficult to ensure the consistency of fabric covering for each speaker enclosure during the operation, which can easily lead to quality problems such as misalignment of the fabric covering position and disordered texture, seriously affecting the standardized production of products. Utility Model Content

[0004] To address the shortcomings of the existing technology, this utility model provides a speaker mesh covering device. The device uses a lifting mechanism inside the housing to drive the speaker positioning seat to lift the speaker equipment, and coordinates with the external support cylinder to drive the external support component to open the mesh, thereby achieving automated speaker mesh covering.

[0005] The technical effects to be achieved by this utility model are realized through the following aspects: This utility model provides a speaker mesh cover device, comprising: A cabinet, the top of which has a first opening, and a lifting mechanism inside the cabinet, the drive end of which has a speaker positioning seat extending out of the first opening; and An external support mechanism is installed above the box body. The external support mechanism includes an external support platform and several external support cylinders. A second opening is provided in the middle of the external support platform. The second opening is coaxially arranged with the first opening. Several external support cylinders are distributed around the fabric sleeve opening. The driving end of the external support cylinder is provided with an external support member. The external support member is used to sleeve the mesh fabric. Among them, several of the external support cylinders are used to drive the external support members to open the mesh fabric, and the lifting mechanism is used to drive the speaker positioning seat to rise to the second opening.

[0006] In some implementations, the included angle between the axes of two adjacent external support cylinders is equal, and the extension and retraction direction of each external support cylinder points to the axis of the second opening.

[0007] In some implementations, the outer support includes a connector and a fabric guide plate. The connector is used to connect the fabric guide plate to the drive end of the outer support cylinder. The length direction of the fabric guide plate is parallel to the axial direction of the second opening.

[0008] In some implementations, the fabric guide plate has an arc-shaped structure for contacting the mesh fabric, and both ends of the fabric guide plate are provided with rounded transition portions to avoid scratching the mesh fabric.

[0009] In some implementations, the external support cylinder is a double-rod cylinder.

[0010] In some implementations, the drive end of the lifting mechanism is detachably connected to the speaker positioning seat, and the side of the speaker positioning seat that abuts against the speaker device is provided with a positioning groove, which is adapted to the bottom contour of the speaker device.

[0011] In some implementations, the housing has a sliding hole at the edge near the first opening, and the lifting mechanism has at least two guide rods on both sides. One end of the guide rod passes through the sliding hole, and the guide rod is arranged parallel to the output direction of the lifting mechanism.

[0012] In some implementations, a linear bearing is provided inside the sliding hole, and the linear bearing is sleeved on the outside of the guide rod.

[0013] In some implementations, the lifting mechanism is a lifting servo screw module.

[0014] In some implementations, the lifting mechanism is a lifting drive cylinder.

[0015] In summary, this utility model has at least the following advantages: This utility model provides a speaker mesh covering device, including a housing and an external support mechanism. The device uses a lifting mechanism inside the housing to drive the speaker positioning seat to lift the speaker equipment, and coordinates with the external support cylinders to drive the external support components to open the mesh, thereby replacing the traditional manual covering method, improving production efficiency while meeting the needs of large-scale production. The external support cylinders are evenly distributed around the second opening, which can evenly open the mesh and ensure consistent tension throughout the mesh. At the same time, the first and second openings are coaxially arranged, and the lifting mechanism drives the speaker positioning seat to rise to the second opening, so that the speaker cavity and the opened mesh are precisely aligned, effectively avoiding problems such as mesh position deviation and texture disorder caused by manual operation, and ensuring the consistency of product quality. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the audio mesh cover device of Embodiment 1 of this utility model.

[0017] Figure 2 This is a partial exploded structural diagram of the audio mesh covering device in embodiments 1, 2, and 3 of this utility model.

[0018] Figure 3 This is a schematic diagram of the structure of the audio mesh cover device in embodiments 2 and 3 of this utility model.

[0019] Marked in the image: 1. Cabinet; 11. First opening; 12. Lifting mechanism; 13. Speaker positioning seat; 14. Linear bearing; 15. Guide rod; 16. Top of cabinet; 2. External support mechanism; 21. External support platform; 22. External support cylinder; 23. External support component; 231. Connecting component; 232. Fabric guide plate; 24. Second opening; 3. Audio equipment. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. The described embodiments are some, but not all, of the embodiments of this utility model.

[0021] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0022] Example 1: Please see Figures 1 to 2 The structure of the speaker mesh covering device of this utility model includes: a housing 1, with a first opening 11 on the top 16 of the housing, a lifting mechanism 12 inside the housing 1, a speaker positioning seat 13 on the driving end of the lifting mechanism 12, and the speaker positioning seat 13 extending out of the first opening 11; and an external support mechanism 2, installed above the housing 1, the external support mechanism 2 including an external support platform 21 and a plurality of external support cylinders 22, a second opening 24 on the middle of the external support platform 21, the second opening 24 being coaxially arranged with the first opening 11, the plurality of external support cylinders 22 being distributed around the covering opening, the driving end of the external support cylinders 22 being provided with an external support member 23, the external support member 23 being used to cover the mesh; wherein, the plurality of external support cylinders 22 are used to drive the external support member 23 to open the mesh, and the lifting mechanism 12 is used to drive the speaker positioning seat 13 to rise to the second opening 24.

[0023] Specifically, the components of the speaker mesh covering device are built on a housing 1. The housing 1 can house a compatible control system to regulate the various drive mechanisms on the device. A lifting mechanism 12 is installed inside the housing 1, and the drive end of the lifting mechanism 12 extends to the first opening 11 at the top 16 of the housing, allowing the speaker positioning seat 13 installed at the drive end of the lifting mechanism 12 to be lifted above the housing 1. An external support platform 21 is provided above the housing 1, and a second opening 24 is provided on the external support platform 21. The second opening 24 is located above the first opening 11 and is coaxially arranged with the first opening 11, so that the lifting mechanism 12 drives the speaker positioning seat 13 from the position of the first opening 11 to the position of the second opening 24, so that the external support member 23 on the external support platform 21 can cover the speaker equipment 3 on the speaker positioning seat 13. The outer support platform 21 is equipped with a number of outer support cylinders 22, which are arranged around the second opening 24. The outer support cylinders 22 are distributed in pairs at intervals. The second opening 24 can be a circular opening, and the driving end of each outer support cylinder 22 points to the center of the second opening 24.

[0024] The outer support cylinder 22 has an outer support member 23 on its drive end. All the outer support members 23 surround a shape that approximates the outer contour of the audio device 3. The mesh is fitted onto this outer contour and is expanded by the contraction of the outer support cylinder 22 so that the audio device 3 can be inserted into it.

[0025] Understandably, in the initial standby state, the drive end of the lifting mechanism 12 is at the first opening 11, the bottom of the speaker positioning seat 13 is flush with the top panel 16 of the cabinet, and the outer support cylinder 22 of the outer support mechanism 2 is in the extended state, so that the contact surface on the outer support member 23 for contacting the cover cloth forms a general outline of the speaker device 3. In the execution state, the outer support cylinder 22 retracts synchronously, causing the outer support member 23 to move away from the center position of the second opening 24.

[0026] It is worth noting that the outer support cylinder 22 can be optionally, but is not limited to, being configured in reverse. That is, when retracting, the outer support member 23 moves towards the center of the second opening 24, and when lifting, it moves away from the center of the second opening 24. The driving direction of the lifting mechanism 12 is perpendicular to the plane of the second opening 24 on the outer support platform 21, so that the audio equipment 3 can smoothly pass through the second opening 24, allowing the outer support mechanism 2 to open the mesh fabric to accommodate the audio equipment 3. In addition, the outer support mechanism 2 can optionally include, but is not limited to, four outer support cylinders 22 simultaneously performing the mesh fabric outward support action. The specific situation depends on the actual circumstances, and this application does not limit this.

[0027] In this embodiment, during the preparation stage, the operator places the mesh fabric over the outer support member 23 in its initial state, places the audio equipment 3 on the audio positioning seat 13, and then starts the audio mesh fabric covering device. After the device is started, the outer support cylinder 22 synchronously drives the outer support member 23 to open the mesh fabric, while the mesh fabric is always positioned above the second opening 24. The lifting mechanism 12 drives the audio positioning seat 13, causing the audio equipment 3 to pass through the second opening 24 and enter the mesh fabric. At this time, the lifting mechanism 12 continues to drive the audio equipment 3 to continue rising until the audio positioning seat 13 completely exceeds the height of the outer support member 23, so that the mesh fabric on the outer support member 23 is completely transferred to the audio equipment 3. The lifting mechanism 12 then performs a lowering action. After the lifting mechanism 12 returns to its initial state, the audio positioning seat 13 returns to the position of the first opening 11, and the outer support cylinder 22 synchronously drives the outer support member 23 to return to its initial state, thereby completing one mesh fabric covering process for the audio equipment 3.

[0028] Example 2: This embodiment is a further structural optimization of the audio mesh cover device of this utility model. Please refer to [link / reference]. Figure 2 and Figure 3 .

[0029] In some embodiments, the included angles of the axes of two adjacent external support cylinders 22 are equal, and the extension and retraction directions of each external support cylinder 22 are all directed toward the axis of the second opening 24.

[0030] Specifically, the second opening 24 is positioned directly above the first opening 11. To facilitate the installation of various types of audio equipment 3, the second opening 24 is circular, maximizing its area to accommodate audio equipment 3 with different outer contours. The arrangement of adjacent outer support cylinders 22 with equal included angles along their axes, combined with the design that the extension and retraction directions of each outer support cylinder 22 point towards the axis of the second opening 24, ensures that the tension applied to the mesh by the outer support member 23 is evenly distributed circumferentially when the mesh is opened. This avoids the problem of excessive or insufficient stretching of the mesh due to uneven force, ensuring that the mesh has a regular shape after being opened, such as a perfect circle or regular polygon, to meet the requirements for the mesh shape during installation.

[0031] In addition, the extension and retraction direction of the outer support cylinder 22 is directed towards the axis of the second opening 24, so that the center of the mesh is always aligned with the center of the second opening 24 during the process of the outer support member 23 opening the mesh. The second opening 24 is coaxial with the first opening 11, so when the lifting mechanism 12 drives the speaker positioning seat 13 to rise, the speaker equipment 3 can be accurately aligned with the center of the mesh, ensuring that the mesh can be accurately fitted onto the speaker equipment 3.

[0032] In some embodiments, the outer support member 23 includes a connector 231 and a fabric guide plate 232. The connector 231 is used to connect the fabric guide plate 232 to the drive end of the outer support cylinder 22. The length direction of the fabric guide plate 232 is parallel to the axial direction of the second opening 24.

[0033] Specifically, the outer support 23 includes a connector 231 and a fabric guide plate 232. The connector 231 fixes the fabric guide plate 232 to the drive end of the outer support cylinder 22. The connector 231 can be adapted to the installation angle of the outer support cylinder 22 and the size of the guide plate to ensure a stable connection between the fabric guide plate 232 and the drive end of the outer support cylinder 22, preventing loosening or detachment during repeated extension and retraction. The length direction of the fabric guide plate 232 is parallel to the axis of the second opening 24, forming a longitudinal guide structure for the mesh fabric to be stressed along the upward path of the audio equipment 3. When the lifting mechanism 12 drives the audio equipment 3 to rise and fit into the mesh fabric, the mesh fabric will be driven by it and slide upward along the fabric guide plate 232, ensuring that the mesh fabric is gradually smoothed out during the fitting process. The fabric guide plate 232 can prevent the mesh fabric from experiencing local jamming or displacement during the fitting process.

[0034] In some embodiments, the fabric guide plate 232 has an arc-shaped structure for contacting the mesh fabric, and both ends of the fabric guide plate 232 are provided with rounded corner transition portions to avoid scratching the mesh fabric.

[0035] Specifically, the curved structure changes the contact between the mesh and the fabric guide plate 232 from line or point contact to surface contact, significantly increasing the contact area. Simultaneously, the fabric guide plate 232 has rounded corners at both ends to avoid sharp edges on its structure. During mesh application and retrieval, the mesh edges will not scratch or snag against the ends of the fabric guide plate 232, preventing appearance defects caused by mechanical friction and ensuring a complete and flat appearance after application.

[0036] In some embodiments, the external support cylinder 22 is a double-rod cylinder.

[0037] Specifically, the external support cylinder 22 is a double-rod cylinder, which has two parallel piston rods. Compared to a single-rod cylinder, it can be synchronously guided and driven by the two rods to limit the radial displacement of the external support 23. When driving the external support 23 to open or close the mesh, the two piston rods of the double-rod cylinder can jointly constrain the movement trajectory of the external support 23, so that it can smoothly perform the extension and retraction action and avoid the external support 23 from shaking or tilting due to uneven force on a single rod.

[0038] In this embodiment, the external support cylinder 22 is a double-rod cylinder, distributed around the second opening 24. The included angle of the axes of adjacent external support cylinders 22 is equal, and they all perform extension and retraction actions in the direction of the axis of the second opening 24. The external support member 23 set on the driving end of the external support cylinder 22 is an arc-shaped fabric guide plate 232. The fabric guide plate 232 has rounded transition portions at both ends to ensure that the fabric can be flatly fitted onto the audio equipment 3.

[0039] Example 3: This embodiment is a further structural optimization of the audio mesh cover device of this utility model. Please refer to [link / reference]. Figures 2 to 3 .

[0040] In some embodiments, the drive end of the lifting mechanism 12 is detachably connected to the speaker positioning seat 13, and the speaker positioning seat 13 has a positioning groove on the side that abuts against the speaker device 3, and the positioning groove is adapted to the bottom contour of the speaker device 3.

[0041] Specifically, the speaker positioning seat 13 is detachably mounted on the drive end of the lifting mechanism 12, allowing operators to quickly replace the speaker positioning seat 13 with the corresponding specification according to the bottom size and shape of different models of speaker equipment 3. The speaker positioning seat 13 is provided with a matching positioning groove, ensuring precise fit with the bottom contour of the speaker equipment 3. This ensures that all types of speaker equipment 3 can be stably placed during the covering process, avoiding positioning offset caused by differences in cavity specifications. This significantly expands the device's adaptability to different product lines, eliminating the need to design separate covering equipment for each speaker model.

[0042] In some embodiments, the housing 1 has a sliding hole at the edge near the first opening 11, and the lifting mechanism 12 has at least two guide rods 15 on both sides. One end of the guide rod 15 passes through the sliding hole, and the guide rod 15 is arranged parallel to the output direction of the lifting mechanism 12.

[0043] Specifically, a through-hole is provided on the housing 1 near the first opening 11, and a pair of guide rods 15 are provided on both sides of the drive end of the lifting mechanism 12. The guide rods 15 pass through the through-hole and are slidably fixed together. One end of the guide rod 15 is fixed to the speaker positioning seat 13, and the other end is fixed to the lifting drive end. The cooperation between the guide rod 15 and the through-hole forms a guiding constraint on the lifting direction of the speaker positioning seat 13, which can effectively limit the radial sway of the lifting mechanism 12 during the driving process. When the lifting mechanism 12 drives the speaker positioning seat 13 to rise or fall, the guide rods 15 on both sides move linearly along the through-hole, which can counteract the tilting torque caused by uneven load, cylinder piston rod extension and contraction deviation, etc., and ensure that the speaker positioning seat 13 always moves smoothly along the axis of the first opening 11.

[0044] In some embodiments, a linear bearing 14 is provided inside the sliding hole, and the linear bearing 14 is sleeved on the outside of the guide rod 15.

[0045] Specifically, a linear bearing 14 is installed inside the sliding hole. The linear bearing 14 replaces the sliding friction between the guide rod 15 and the sliding hole with rolling friction, which can significantly reduce the resistance when the guide rod 15 moves. When the lifting mechanism 12 drives the audio positioning seat 13 to rise or fall, the guide rod 15 can slide smoothly along the linear bearing 14, avoiding the lifting and lowering jamming and sluggishness caused by excessive frictional resistance. This ensures that the audio equipment 3 can smoothly and continuously complete the rising and lowering reset actions, reducing the wrinkles or fitting deviations of the mesh fabric caused by uneven movement.

[0046] In some embodiments, the lifting mechanism 12 is a lifting servo screw module.

[0047] Specifically, the lifting servo screw module drives the screw to rotate via a servo motor, which can precisely control the rising height of the speaker positioning seat 13, ensuring that the speaker equipment 3 can accurately reach the optimal alignment position with the mesh fabric spread out in the outer support mechanism 2 each time. The motion characteristics of the screw drive are continuous and stable linear motion, without the impact sensation caused by the gas compression elasticity of cylinder drive.

[0048] In some embodiments, the lifting mechanism 12 is a lifting drive cylinder.

[0049] Specifically, the lifting mechanism 12 uses a lifting drive cylinder, which has a shorter single lifting cycle time, effectively shortening the fabrication cycle of a single audio device 3, thereby improving overall production efficiency. Furthermore, the lifting drive cylinder has lower requirements for the working environment, can operate stably in industrial environments with dust and slight vibration, and is not easily affected by temperature fluctuations. In this embodiment, a speaker positioning seat 13 is detachably installed on the drive end of the lifting mechanism 12, allowing for matching and replacement according to different models of speaker equipment 3. This enables the installation of covers for different product lines. Near the first opening 11 on the housing 1, there are two sliding holes with linear bearings 14 for the guide rod 15 to pass through. This ensures the stability and continuity of the speaker equipment 3 during transport when the lifting mechanism 12 drives the speaker positioning seat 13 to rise or fall. The lifting mechanism 12 can be implemented using, but is not limited to, a lifting drive cylinder or a lifting servo screw module to accommodate different speaker positioning seats 13 and adapt to different production needs.

[0050] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0051] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0052] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0053] In this invention, unless otherwise expressly specified and limited, "above or below" the first feature may include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on" the first feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the first feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0054] Although the description of this utility model has been given in conjunction with the specific embodiments described above, it is obvious to those skilled in the art that many substitutions, modifications, and variations can be made based on the above description. Therefore, all such substitutions, modifications, and variations are included within the spirit and scope of the appended claims.

Claims

1. A sound cloth covering device for a sound device, characterized by, include: The enclosure has a first opening at the top and a lifting mechanism inside. The driving end of the lifting mechanism has a speaker positioning seat, which extends out of the first opening. as well as An external support mechanism is installed above the box body. The external support mechanism includes an external support platform and several external support cylinders. A second opening is provided in the middle of the external support platform. The second opening is coaxially arranged with the first opening. Several external support cylinders are distributed around the fabric sleeve opening. The driving end of the external support cylinder is provided with an external support member. The external support member is used to sleeve the mesh fabric. Among them, several of the external support cylinders are used to drive the external support members to open the mesh, and the lifting mechanism is used to drive the speaker positioning seat to rise to the second opening.

2. The acoustic webbing sleeve device of claim 1, wherein, The included angle between the axes of two adjacent external support cylinders is equal, and the extension and retraction direction of each external support cylinder points to the axis of the second opening.

3. The acoustic webbing sleeve apparatus of claim 2, wherein, The outer support includes a connector and a fabric guide plate. The connector is used to connect the fabric guide plate to the drive end of the outer support cylinder. The length direction of the fabric guide plate is parallel to the axial direction of the second opening.

4. The audio mesh covering device according to claim 3, characterized in that, The fabric guide plate has an arc-shaped structure and is used to contact the mesh fabric. Both ends of the fabric guide plate are provided with rounded transition parts to avoid scratching the mesh fabric.

5. The acoustic mesh cover device according to any one of claims 1-4, characterized in that, The external support cylinder is a double-rod cylinder.

6. The acoustic webbing sleeve device of claim 1, wherein, The drive end of the lifting mechanism is detachably connected to the speaker positioning seat. The speaker positioning seat has a positioning groove on the side that abuts against the speaker equipment, and the positioning groove is adapted to the bottom contour of the speaker equipment.

7. The audio mesh covering device according to claim 1, characterized in that, The housing has a sliding hole at the edge near the first opening. The lifting mechanism has at least two guide rods on both sides. One end of the guide rod passes through the sliding hole, and the guide rod is arranged parallel to the output direction of the lifting mechanism.

8. The acoustic webbing sleeve device of claim 7, wherein, A linear bearing is provided inside the sliding hole, and the linear bearing is sleeved on the outside of the guide rod.

9. The audio mesh covering device according to claim 1, characterized in that, The lifting mechanism is a lifting servo screw module.

10. The audio mesh covering device according to claim 1, characterized in that, The lifting mechanism is a lifting drive cylinder.