Flexible membrane assembly and light sound insulation board applying same

Abstract

The invention relates to a flexible membrane assembly and a light sound insulation board applying the flexible membrane assembly, the flexible membrane assembly comprises a first flexible membrane, a second flexible membrane and at least one mass block, the first flexible membrane and the second flexible membrane are stacked and connected with each other; limiting cavities which are in one-to-one correspondence with the mass blocks and are used for limiting the mass blocks are formed between the first flexible film and the second flexible film, and the mass blocks are arranged in the limiting cavities. According to the flexible membrane assembly, the limiting cavity for limiting the mass block is formed between the first flexible membrane and the second flexible membrane, it can be guaranteed that the mass block is not prone to falling off, the structural stability of the flexible membrane assembly is better, and the service life is longer. According to the light sound insulation board adopting the flexible membrane assembly, due to the fact that the structural stability of the flexible membrane assembly is good, the effective duration of the sound insulation effect of the light sound insulation board can be guaranteed.

Description

Technical Field

[0001] This invention relates to the field of sound insulation panel technology, and more particularly to a flexible membrane assembly and a lightweight sound insulation panel using the same. Background Technology

[0002] Thin-film acoustic metamaterial sound insulation panels exhibit excellent low-frequency sound insulation performance due to their localized resonance effect, overturning the "mass density law" followed by traditional sound insulation panels. This makes lightweight sound insulation technology possible and has become a research hotspot for many scholars in recent years. By setting mass blocks on the surface of the flexible film, the resonant frequency can be adjusted, thereby increasing the width of the sound insulation bandwidth.

[0003] In practical applications, the mass block is usually made of metal and is bonded to one surface of the flexible membrane. Due to vibration, there is a risk that the metal block may detach after prolonged use, which would weaken the sound insulation effect. In addition, to delay the detachment of the metal block, a strong adhesive is often required, which is relatively expensive. Summary of the Invention

[0004] The purpose of this invention is to provide a flexible membrane module and a lightweight sound insulation board using the same, which has a mass block that is not easy to fall off and has a long service life.

[0005] To achieve the above objectives, the present invention discloses a flexible membrane assembly, which includes a first flexible membrane, a second flexible membrane, and at least one mass block. The first flexible membrane and the second flexible membrane are stacked and connected to each other, and a limiting chamber is formed between the first flexible membrane and the second flexible membrane, which corresponds one-to-one with the mass block and is used to limit the mass block. The mass block is placed in the limiting chamber.

[0006] Preferably, the first flexible film has a first bonding area and at least one first forming area, the first bonding area surrounding the outer periphery of the first forming area; the second flexible film has a second bonding area and at least one second forming area, the second bonding area surrounding the outer periphery of the second forming area; the first forming area and the second forming area correspond one-to-one and cooperate to form a limiting cavity, the first bonding area and the second bonding area correspond to each other, and a partial area or all of the first bonding area is connected to the second bonding area.

[0007] Preferably, a portion or all of the first bonding area is bonded or heat-fused to the second bonding area.

[0008] Preferably, the first molding area and / or the second molding area have a recessed structure.

[0009] Preferably, the mass block is a solid block; or, the mass block is composed of several filaments, strips, or particles; or, the mass block is a liquid.

[0010] Preferably, the mass block is a solid block, or the mass block is composed of several filaments, strips, or particles, and the mass block fills or adheres to the limiting cavity.

[0011] Preferably, the mass block is a liquid, the limiting chamber is a closed chamber, and an injection channel corresponding to the limiting chamber is formed between the first flexible membrane and the second flexible membrane. One end of the injection channel is connected to the limiting chamber, and the other end of the injection channel is suspended.

[0012] Preferably, the mass block is a liquid with a density of not less than 1.5 kg / m³; the mass block is mineral oil, inorganic matter, or organic matter.

[0013] Preferably, the first flexible film and the second flexible film are made of one of the following materials: polyimide, polyethylene, polyvinyl chloride, polypropylene, silicone rubber, PEI, PET, PET, PAR, PPS, and PEEK.

[0014] The present invention also discloses a lightweight sound insulation board, which includes a frame and at least one of the above-mentioned flexible membrane components. The frame is provided with hollow holes corresponding to mass blocks, and the mass blocks are located at the center of the hollow holes. The first flexible membrane and / or the second flexible membrane are connected to the frame. The frame is made of rigid material or flexible material.

[0015] The present invention has the following beneficial effects: This invention, by forming a limiting chamber for the mass block between the first and second flexible membranes, ensures that the mass block is not easily detached, resulting in better structural stability and a longer service life for the flexible membrane assembly. Furthermore, lightweight sound insulation panels employing the aforementioned flexible membrane assembly can guarantee the effective duration of their sound insulation effect due to the good structural stability of the flexible membrane assembly. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of Example 1.

[0017] Figure 2 This is an exploded view of Example 1.

[0018] Figure 3 This is a cross-sectional view of Example 1.

[0019] Figure 4 This is a schematic diagram of Example 3.

[0020] Figure 5 This is a schematic diagram of Example 5.

[0021] Figure 6 This is a cross-sectional view of Example 5.

[0022] Figure 7 This is a cross-sectional view of Example 6.

[0023] Figure 8 This is a schematic diagram of the connection method between the frame and the flexible membrane assembly in Embodiment 7.

[0024] Figure 9 This is a schematic diagram of the second connection method between the frame and the flexible membrane assembly in Embodiment 7.

[0025] Figure 10 This is a schematic diagram of the first combination of the frame and flexible membrane assembly in Embodiment Seven.

[0026] Figure 11 This is a schematic diagram of the second combination of the frame and flexible membrane assembly in Embodiment Seven.

[0027] Figure 12 This is a schematic diagram of the third combination of the frame and flexible membrane assembly in Embodiment Seven.

[0028] Figure 13 This is a schematic diagram of the fourth combination of the frame and flexible membrane assembly in Embodiment Seven.

[0029] Note: For easier viewing, the first and second flexible membranes in the above figures have been thickened.

[0030] Explanation of symbols for main components: First flexible membrane 11, first bonding area 111, first forming area 112, second flexible membrane 12, second bonding area 121, second forming area 122, limiting chamber 13, injection channel 14, mass block 15, connecting node 16. Frame 20, first frame 21, second frame 22, cutout hole 23. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0032] Example 1 like Figures 1-3 As shown, this embodiment discloses a flexible membrane assembly, including a first flexible membrane 11, a second flexible membrane 12, and at least one mass block 15. The first flexible membrane 11 and the second flexible membrane 12 are films made of any one of the following materials: polyimide, polyethylene, polyvinyl chloride, polypropylene, silicone rubber, PEI, PET, PET, PAR, PPS, and PEEK. The mass block 15 is a solid block, such as a metal block. The first flexible membrane 11 and the second flexible membrane 12 are stacked and interconnected, and a limiting chamber 13 is formed between the first flexible membrane 11 and the second flexible membrane 12, corresponding one-to-one with the mass block 15 and used to limit the mass block 15. The mass block 15 is placed in the limiting chamber 13.

[0033] Taking a flexible membrane assembly with only one mass block 15 as an example, the first flexible membrane 11 has a first bonding area 111 and at least one first forming area 112, with the first bonding area 111 surrounding the outer periphery of the first forming area 112. The second flexible membrane 12 has a second bonding area 121 and at least one second forming area 122, with the second bonding area 121 surrounding the outer periphery of the second forming area 122. The first forming area 112 and the second forming area 122 correspond one-to-one and cooperate to form a limiting chamber 13. The first bonding area 111 corresponds to the second bonding area 121, and the entire area of ​​the first bonding area 111 is bonded or heat-fused to the second bonding area 121. By connecting the first bonding area 111 and the second bonding area 121, the limiting chamber 13 can be formed. During assembly, the first flexible membrane 11 can be laid flat, then the mass block 15 can be placed in each of the first forming areas 112, then the second flexible membrane 12 can be placed on top of the first flexible membrane 11, and then the bonding areas can be heat-fused. The formed limiting chamber 13 can effectively restrict the mass block 15, making it less likely to fall off.

[0034] Example 2 The difference between this embodiment and Embodiment 1 is that the mass block 15 is also bonded to the limiting chamber 13, that is, one side of the mass block 15 is bonded to the first flexible membrane 11, and the other side of the mass block 15 is bonded to the second flexible membrane 12. This arrangement makes the positional stability of the mass block 15 stronger and the mass block 15 less likely to fall off.

[0035] Example 3 The difference between this embodiment and any of the above embodiments is that only a partial area of ​​the first bonding area 111 is bonded or thermally fused to the second bonding area 121. For example, the connecting nodes 16 continuously surround the limiting cavity 13, as shown in the figure. Alternatively, the connecting nodes 16 may intermittently surround the limiting cavity 13. This arrangement reduces the number of connecting nodes 16 between the first flexible film 11 and the second flexible film 12, thus improving processing efficiency.

[0036] Example 4 The difference between this embodiment and any of the above embodiments is that the mass block 15 is composed of several filaments, strips, or granules. The filaments can be metal wires, the strips can be metal strips, and the granules can be small metal balls. This configuration of the mass block 15 allows for the utilization of processing waste or scraps, saving material costs and providing more options. The filaments, strips, or granules can be pre-aggregated to prevent them from scattering.

[0037] Example 5 like Figures 5-6As shown, the difference between this embodiment and Embodiment 1 is that the mass block 15 is a liquid. To prevent liquid loss, the limiting chamber 13 is required to be a sealed chamber. Furthermore, an injection channel 14 corresponding to the limiting chamber 13 is formed between the first flexible membrane 11 and the second flexible membrane 12. One end of the injection channel 14 connects to the limiting chamber 13, while the other end is suspended (i.e., connected to the outside of the flexible membrane). During assembly of the flexible membrane assembly, the first flexible membrane 11 and the second flexible membrane 12 are first connected, and then liquid is injected from the suspended end of the injection channel 14 to fill the limiting chamber 13. Afterward, the injection channel 14 is sealed. This embodiment uses liquid as the mass block 15, which has almost zero wear between it and the flexible membrane, and can fill all parts of the limiting chamber 13, providing a new option. In addition, different liquids have different resonant frequencies, offering more choices.

[0038] In addition, to prevent liquid evaporation, the liquid in the mass block 15 is required to have a density of not less than 1.5 kg / m³, and the liquid may be mineral oil, inorganic or organic matter.

[0039] Example 6 like Figure 7 As shown, the difference between this embodiment and Embodiment 5 is that the first forming area 112 and / or the second forming area 122 have a recessed structure. In this case, both the first forming area 112 and the second forming area 122 are shown as recessed structures, as shown in the figure. This configuration expands the space of the limiting chamber 13. When using the same liquid, the weight of the mass block 15 in this embodiment can be greater than that in Embodiment 5; and when a constant weight of the mass block 15 is required, a liquid with a lower density can be used in this embodiment compared to Embodiment 5. Of course, when the mass block 15 is a solid block, or when the mass block 15 is composed of several filaments, strips, or particles, the first forming area 112 and / or the second forming area 122 can also have a recessed structure. The recessed structure can be formed by locally stamping a flexible membrane.

[0040] Example 7 This embodiment discloses a lightweight sound insulation panel, which includes a frame 20 and a flexible membrane assembly as described in any of the above embodiments. The frame 20 has perforated holes 23 corresponding to mass blocks 15, with the mass blocks 15 located at the center of each perforated hole 23. A first flexible membrane 11 and / or a second flexible membrane 12 are connected to the frame 20. Generally, it is preferable that the perforated holes 23 are arranged in an array on the frame 20. For example, the flexible membrane assembly can be disposed on one side of the frame 20, with the first flexible membrane 11 bonded and fixed to the frame 20; this is one connection method. Figure 8As shown; for example, the frame 20 is divided into a first frame 21 and a second frame 22, and the flexible membrane assembly is placed between the first frame 21 and the second frame 22. The first frame 21 and the second frame 22 simultaneously clamp and fix the first flexible membrane 11 and the second flexible membrane 12. This is the second connection method, as shown. Figure 9 As shown. The frame 20 and the flexible membrane module can be paired in various ways. For example, a frame 20 may have only one perforation 23, corresponding to a flexible membrane module with only one mass block 15. This is one pairing method. Figure 10 As shown. For example, a frame 20 has 16 perforated holes 23 (arranged in a 4x4 array). This frame 20 corresponds to a flexible membrane assembly, which in turn has 16 mass blocks 15 (arranged in a 4x4 array). This is a second configuration method. Figure 11 As shown; or, the frame 20 corresponds to 16 sets of flexible membrane modules, each set of flexible membrane modules having only one mass block 15, this is the third configuration method, as shown. Figure 12 As shown; or, the frame 20 corresponds to 4 sets of flexible membrane modules, and each Tong'an flexible membrane module is equipped with 4 mass blocks 15. This is the fourth configuration method, as shown. Figure 13 As shown.

[0041] In this embodiment, the frame 20 can be supported by a rigid material, meaning the frame 20 is a rigid frame that cannot be bent. Alternatively, the frame 20 can also be made of a flexible material, meaning the frame 20 can be bent and deformed to a certain extent to adapt to complex installation scenarios.

[0042] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A flexible film assembly, characterized by: The flexible film assembly comprises a first flexible film, a second flexible film and at least one mass block, the first flexible film and the second flexible film are stacked and connected with each other, and a limiting cavity corresponding to the mass block and used for limiting the mass block is formed between the first flexible film and the second flexible film, and the mass block is arranged in the limiting cavity.

2. The flexible film assembly of claim 1, wherein: The first flexible film is provided with a first bonding area and at least one first forming area, the first bonding area surrounds the outer periphery of the first forming area; the second flexible film is provided with a second bonding area and at least one second forming area, the second bonding area surrounds the outer periphery of the second forming area; the first forming area and the second forming area correspond to each other and cooperate to form the limiting cavity, the first bonding area corresponds to the second bonding area, and the local area or the whole area of the first bonding area is connected with the second bonding area.

3. The flexible film assembly of claim 2, wherein: The local area or the whole area of the first bonding area is bonded or hot-melt connected with the second bonding area.

4. The flexible film assembly of claim 2, wherein: The first forming area and / or the second forming area are in a recessed structure.

5. The flexible film assembly of claim 1, wherein: The mass block is a solid block; or the mass block is composed of a plurality of filaments, strips or particles; or the mass block is a liquid.

6. The flexible film assembly of claim 5, wherein: The mass block is a solid block, or the mass block is composed of a plurality of filaments, strips or particles, and the mass block is filled or bonded in the limiting cavity.

7. The flexible film assembly of claim 5, wherein: The mass block is a liquid, the limiting cavity is a closed cavity, and an injection channel corresponding to the limiting cavity is further formed between the first flexible film and the second flexible film, one end of the injection channel communicates with the limiting cavity, and the other end of the injection channel is arranged in a suspended manner.

8. The flexible film assembly of claim 5, wherein: The mass block is a liquid with a density not less than 1.5 kg / m³; the mass block is a mineral oil or an inorganic or organic substance.

9. The flexible film assembly of claim 1, wherein: The material of the first flexible film and the second flexible film is one of polyimide, polyethylene, polyvinyl chloride, polypropylene, silicone rubber, PEI, PET, PET, PAR, PPS, PEEK.

10. A lightweight acoustical panel, characterized by: The flexible film assembly comprises a frame and at least one flexible film assembly according to any one of claims 1-9, the frame is provided with a hollow hole corresponding to the mass block, the mass block is located at the center position of the hollow hole, and the first flexible film and / or the second flexible film is connected with the frame; the frame is made of a hard material or a flexible material.

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