An indoor sound absorbing device

Abstract

This utility model relates to the field of acoustic decoration technology, specifically an indoor sound-absorbing device that solves the problems mentioned in the background art. It includes a sound-absorbing body with a trapezoidal cross-section, fixed in a corner of the room. An adjustable gap is left between the rear end face of the sound-absorbing body and the corner, forming a corner cavity. An adjustable angle mounting base is provided at the bottom of the sound-absorbing body. The adjustable angle mounting base includes a base with symmetrically arranged L-shaped substrates. The L-shaped substrates have an arc-shaped adjustment groove, which includes an outer groove and an inner groove, marked with angle graduations. A slider is installed in the outer groove, and the slider is fixedly connected to the bottom of the sound-absorbing body. A locking bolt passes through the slider and is threadedly connected to the inner groove. This utility model combines decorative appeal with convenient operation, comprehensively solving the technical problems of difficult adjustment, limited frequency band, and unstable installation in traditional corner sound-absorbing devices.

Description

Technical Field

[0001] This utility model relates to the field of acoustic decoration technology, specifically to an indoor sound absorption device. Background Technology

[0002] Indoor sound-absorbing devices are used to improve the acoustic environment inside buildings. Their main functions are to absorb or reduce sound reflections, reduce reverberation time, decrease noise interference, and improve speech intelligibility and auditory comfort. They are widely used in conference rooms, theaters, recording studios, offices, classrooms, hotels, and other places with high acoustic requirements.

[0003] Chinese patent application number 202321755491.1 discloses an indoor sound-absorbing device, including a sound absorber with a trapezoidal cross-section. The sound absorber is fixed in a corner of the room, with a gap between the rear end face of the sound absorber and the corner corner, forming a corner cavity. While this technical solution can reduce the size of the sound absorber and maximize mid-to-low frequency absorption using the corner cavity structure, and its side has a certain angle, allowing it to perfectly fit the wall with Z-shaped or V-shaped frames, this invention lacks an angle adjustment device, making it unsuitable for non-right-angle walls. During use, it suffers from technical problems such as difficulty in adjusting the sound-absorbing device, limited frequency band, and unstable installation. Utility Model Content

[0004] To solve the above problems, this utility model provides the following technical solution: an indoor sound-absorbing device, including a sound-absorbing body with a trapezoidal cross-section, fixed in a corner of the room, with an adjustable gap between the rear end face of the sound-absorbing body and the corner corner to form a corner cavity, and an adjustable angle mounting base at the bottom of the sound-absorbing body, the adjustable angle mounting base including a base, with L-shaped base plates symmetrically arranged on the base, the L-shaped base plates having an arc-shaped adjustment groove, the arc-shaped adjustment groove including an outer groove and an inner groove, and marked with angle scales, the outer groove being fitted with a slider, the slider being fixedly connected to the bottom of the sound-absorbing body, and the locking bolt passing through the slider and threadedly connected to the inner groove.

[0005] As a further improvement to the above technical solution:

[0006] The sound absorber is composed of multiple layers of composite sound-absorbing material, including a perforated decorative panel, a porous sound-absorbing layer and a backing damping layer arranged sequentially from the outside to the inside.

[0007] The locking bolt is a wing nut.

[0008] The base is equipped with a vacuum suction cup at its bottom.

[0009] The central angle of the arc-shaped adjusting groove is 0° to 30°, and the width of the outer groove is greater than that of the inner groove, forming a stepped guide groove structure.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] By combining the trapezoidal cross-section sound absorber with the adjustable-gap corner cavity, the sound absorption frequency band is significantly widened and the low-frequency sound absorption performance is improved. The stepped arc-shaped sliding base with angle scale, together with the vacuum suction cup for fixation, achieves precise angle adjustment of the sound absorber from 0° to 30° and stable installation. The multi-layer composite sound absorption structure (perforated decorative panel + porous sound absorption layer + backing damping layer) combined with the butterfly nut quick-locking design ensures a wide frequency absorption effect while also being decorative and easy to operate. It solves the technical problems of traditional corner sound absorption devices, such as difficulty in adjustment, single frequency band, and unstable installation. Attached Figure Description

[0012] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0013] Figure 1 This is a schematic diagram of the overall front view of the present invention;

[0014] Figure 2 This is a schematic diagram of the L-shaped substrate structure of this utility model;

[0015] Figure 3 This is a schematic diagram of the sound absorber structure of this utility model;

[0016] Figure 4 This is a top view of the structure of this utility model.

[0017] In the diagram: 1. Sound absorber; 2. Corner; 3. Corner cavity; 4. Adjustable angle mounting base; 41. Base; 42. L-shaped substrate; 43. Arc-shaped adjustment groove; 431. Outer groove; 432. Inner groove; 44. Slider; 45. Locking bolt; 5. Perforated decorative panel; 6. Porous sound-absorbing layer; 7. Backing damping layer; 8. Wing nut; 9. Vacuum suction cup. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0019] like Figure 1-4As shown, the indoor sound-absorbing device of this embodiment includes a sound-absorbing body 1 with a trapezoidal cross-section. It is fixed in a corner 2 of the room. An adjustable gap is left between the rear end face of the sound-absorbing body 1 and the corner 2 to form a corner cavity 3. The bottom of the sound-absorbing body 1 is provided with an adjustable angle mounting base 4. The adjustable angle mounting base 4 includes a base 41. The base 41 is symmetrically provided with an L-shaped base plate 42. The L-shaped base plate 42 is provided with an arc-shaped adjustment groove 43. The arc-shaped adjustment groove 43 includes an outer groove 431 and an inner groove 432, and is marked with angle scale. A slider 44 is installed in the outer groove 431. The slider 44 is fixedly connected to the bottom of the sound-absorbing body 1. A locking bolt 45 passes through the slider 44 and is threadedly connected to the inner groove 432.

[0020] The sound absorber 1 is composed of multiple layers of composite sound-absorbing materials, including a perforated decorative panel 5, a porous sound-absorbing layer 6, and a backing damping layer 7 arranged sequentially from the outside to the inside. The multi-layer composite structure enhances the overall strength and prevents deformation after long-term use.

[0021] The locking bolt 45 uses a wing nut 8, which improves the convenience of adjustment and stability.

[0022] The base 41 is equipped with a vacuum suction cup 9 at its bottom for temporary fixation to a wall or ground, allowing for manual adjustment and enhancing installation flexibility, making it suitable for different scenarios.

[0023] The central angle of the arc-shaped adjusting groove 43 is 0° to 30°, and the width of the outer groove 431 is greater than that of the inner groove 432, forming a stepped guide groove structure. The inner groove 432 is provided with threads for threaded connection with the locking bolt 45.

[0024] The working principle of this utility model:

[0025] The trapezoidal cross-section of the sound absorber 1 forms an adjustable gap cavity 3 with the corner of the wall, enhancing the low-frequency sound absorption effect using the Helmholtz resonance principle. Simultaneously, the multi-layered composite structure (perforated decorative panel 5 + porous sound-absorbing layer 6 + backing damping layer 7) works synergistically to absorb high, medium, and low-frequency sound waves respectively. By changing the angle of the sound absorber 1 (0°~30°), the incident direction of the sound waves is adjusted, optimizing the sound absorption efficiency. An arc-shaped adjusting groove 43: The slider 44 slides along the outer groove 431, allowing precise adjustment of the sound absorber's tilt angle via an angle scale. The outer groove 431 is wider than the inner groove 432. The inner groove 432 is used for threaded connection with the locking bolt 45. After tightening the wing nut, the slider position is fixed to ensure stability. The vacuum suction cup 9 temporarily adheres to the ground / wall surface for convenient single-person operation and adjustment.

[0026] First, place the device in a corner of the room and press the vacuum suction cup 9 at the bottom of the base 41 to attach and fix it. Then, loosen the wing nut 8 and slide the sound absorber 1 to the desired angle (0°-30° range) according to the angle scale on the arc-shaped groove. Optimize the sound absorption effect by changing the angle between the sound absorber 1 and the wall. After adjustment, tighten the wing nut 8 to fix the position of the slider 44. Simultaneously, the gap between the rear end face of the sound absorber 1 and the corner of the wall can be adjusted using the overall moving device to control the low-frequency sound absorption performance. Finally, check that all connections are secure to complete the installation and debugging. The entire process requires no professional tools; a single person can quickly and accurately adjust the angle and gap to achieve optimal indoor acoustic effects.

[0027] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An indoor sound-absorbing device, comprising a sound-absorbing body (1), wherein the cross-section of the sound-absorbing body (1) is trapezoidal, and it is fixed at a corner (2) of the room, wherein an adjustable gap is left between the rear end face of the sound-absorbing body (1) and the corner (2) to form a corner cavity (3), characterized in that: The bottom of the sound absorber (1) is provided with an adjustable angle mounting base (4). The adjustable angle mounting base (4) includes a base (41). The base (41) is symmetrically provided with an L-shaped substrate (42). The L-shaped substrate (42) is provided with an arc-shaped adjustment groove (43). The arc-shaped adjustment groove (43) includes an outer groove (431) and an inner groove (432), and is marked with an angle scale. The outer groove (431) is equipped with a slider (44). The slider (44) is fixedly connected to the bottom of the sound absorber (1). It also includes a locking bolt (45). The locking bolt (45) passes through the slider (44) and is threadedly connected to the inner groove (432).

2. The indoor sound-absorbing device according to claim 1, characterized in that: The sound absorber (1) is composed of multiple layers of composite sound-absorbing materials, including a perforated decorative panel (5), a porous sound-absorbing layer (6), and a backing damping layer (7) arranged sequentially from the outside to the inside.

3. The indoor sound-absorbing device according to claim 1 or 2, characterized in that: The locking bolt (45) is a wing nut (8).

4. The indoor sound-absorbing device according to claim 3, characterized in that: The base (41) is provided with a vacuum suction cup (9) at its bottom.

5. The indoor sound-absorbing device according to claim 1, characterized in that: The central angle of the arc-shaped adjusting groove (43) is 0° to 30°, and the width of the outer groove (431) is greater than that of the inner groove (432), forming a stepped guide groove structure.

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