Acoustic metamaterial structure assembly with double-layer frame

Abstract

The utility model provides an acoustic metamaterial structure assembly with a double-layer frame, which comprises an acoustic metamaterial body, an outer ring frame located at the bottom of the acoustic metamaterial body, the acoustic metamaterial body is connected with the outer ring frame through a locking piece, an inner ring frame located in a cavity of the outer ring frame, and an outer ring frame located in the cavity of the inner ring frame. The utility model relates to the technical field of acoustic meta-materials, a mass block and a single-frame unit-cell structure are replaced by a mass-block-free double-layer concentric circle frame structure, under the condition that the system mass is the same, the mass block-free double-layer concentric circle frame structure is adopted, the mass block-free double-layer concentric circle frame structure is adopted, and the mass block-free double-layer concentric circle frame structure is adopted. Compared with a unit cell structure, the double-layer concentric circle frame structure is more excellent in noise reduction capacity in a low-frequency wave band, the noise reduction frequency band is wider at a lower frequency position in a high sound insulation amount area, and the effect of improving the effective quality or obtaining the negative effective quality is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to acoustic metamaterial technical field especially is related to an acoustic metamaterial structure assembly with double -deck frame. BACKGROUND

[0002] Acoustic metamaterial is a new type of artificial design material, realizes the super normal acoustics or mechanics performance that conventional material does not have, for the thin film type acoustic metamaterial (MAM) of possessing round mass block, mass block and frame structure are the most classic model, although breaking the mass law, but its performance in low frequency noise reduction is not ideal, so people change the geometry shape, material and assembly mode of model in various ways to improve the noise reduction capacity to meet the demand.

[0003] The traditional acoustic metamaterial is through placing mass block on the membrane to reach the effect of improving sound insulation capacity, but the design of mass block is not ideal for improving effective mass or obtaining the effect of negative effective mass. UTILITY MODEL CONTENT

[0004] The utility model discloses a kind of acoustic metamaterial structure assemblies with double -deck frame, to solve the problem that the effect of traditional acoustic metamaterial is not ideal for improving effective mass or obtaining negative effective mass by placing mass block on the membrane.

[0005] The utility model provides a kind of acoustic metamaterial structure assembly with double -deck frame, including acoustic metamaterial body, load-bearing assembly is installed on the acoustic metamaterial body, and the load-bearing assembly is used to support the acoustic metamaterial body;

[0006] The load-bearing assembly includes outer ring frame, inner ring frame, connecting piece and locking piece;

[0007] The outer ring frame is located at the bottom of the acoustic metamaterial body, and the acoustic metamaterial body is connected by the locking piece and the outer ring frame;The inner ring frame is located in the cavity of the outer ring frame, and the inner ring frame is connected by the connecting piece and the outer ring frame.

[0008] Preferably, the connecting piece includes sleeve, screw rod and top pin;

[0009] The sleeve and the outer periphery of the inner ring frame are fixedly connected, the screw rod and the sleeve are screw-connected, the top pin is fixedly connected to the end of the screw rod away from the sleeve, and the top pin is inserted into the limiting groove of the outer ring frame.

[0010] Preferably, the locking piece includes sleeve ring and positioning pin;

[0011] The inner cavity of the collar is adapted to the outer diameter of the outer ring frame, the acoustic metamaterial body is located between the collar and the outer ring frame, and the collar is connected to the outer ring frame via the positioning pin.

[0012] Preferably, the acoustic metamaterial body is a latex film.

[0013] Preferably, the outer ring frame and the inner ring frame are both made of ethylene and vinyl acetate copolymer.

[0014] Preferably, the outer ring frame and the inner ring frame are arranged in concentric circles.

[0015] Preferably, the thickness of the inner ring frame is 0.3-0.5 mm.

[0016] Preferably, the radius of the outer ring frame is 6-8 mm.

[0017] Preferably, the outer ring frame and the inner ring frame have the same height.

[0018] Preferably, the outer circumference of the outer ring frame is processed with grooves adapted to the positioning pins, and the grooves are evenly distributed along the outer ring frame.

[0019] The utility model provides an acoustic metamaterial structural component with a double-layer frame:

[0020] Through the coordinated use of acoustic metamaterial bodies, outer ring frames, inner ring frames, etc., the mass block and single-frame unit cell structure are replaced with a mass-block-free double-layer concentric circle frame structure. Under the condition of the same system mass, the double-layer concentric circle frame structure has better noise reduction capability in the low-frequency band than the unit cell structure, which is manifested in the high-volume isolation area at lower frequencies and a wider noise reduction band, thereby increasing the effective mass or obtaining the effect of negative effective mass. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 This is a schematic diagram of the structure of the utility model;

[0023] Figure 2 This is a schematic structural diagram of the sleeve ring, positioning pin and outer ring frame in the utility model;

[0024] Figure 3The structure schematic view of the sleeve, the screw rod and the ejector pin in the utility model is shown in the figure.

[0025] Figure 4 The structure schematic view of the outer ring frame, the inner ring frame and the connecting piece in the utility model is shown in the figure.

[0026] Figure 5 The structure schematic view of the outer ring frame, the inner ring frame and the sleeve ring in the utility model is shown in the figure.

[0027] Mark explanation:

[0028] 1-acoustic metamaterial body, 2-bearing assembly, 21-outer ring frame, 22-inner ring frame, 23-connecting piece, 231-sleeve, 232-screw rod, 233-ejector pin, 24-locking piece, 241-sleeve ring, 242-positioning pin. Specific implementation

[0029] The technical scheme of the utility model will be described clearly and completely in combination with the embodiments, obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.

[0030] In the description of the utility model, it is understood that the orientation or position relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0031] In the description of the present invention, it should be understood that the terms "first"-"second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first"-"second" may explicitly or implicitly include one or more of the said features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed"-"connected"-"connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be a communication between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0032] In this embodiment, if Figure 1 and Figure 2 As shown, an acoustic metamaterial structural component with a double-layer frame includes an acoustic metamaterial body 1, on which a bearing assembly 2 is installed. The bearing assembly 2 is used to support the acoustic metamaterial body 1. The bearing assembly 2 includes an outer ring frame 21, an inner ring frame 22, a connector 23 and a locking member 24. The outer ring frame 21 is located at the bottom of the acoustic metamaterial body 1, and the acoustic metamaterial body 1 is connected to the outer ring frame 21 through the locking member 24. The inner ring frame 22 is located in the cavity of the outer ring frame 21, and the inner ring frame 22 is connected to the outer ring frame 21 through the connector 23.

[0033] Therefore, the outer ring frame 21 and the inner ring frame 22 are placed in concentric circles, and the outer ring frame 21 and the inner ring frame 22 are connected by using a connector 23, so that the outer ring frame 21 and the inner ring frame 22 form a double-layer concentric circle frame, and the acoustic metamaterial body 1 is placed on one side of the outer ring frame 21 and the inner ring frame 22, and the locking member 24 is used to fix the position of the acoustic metamaterial body 1 on the outer ring frame 21. The traditional mass block and single-frame single-cell structure are replaced with a mass-free outer ring frame 21 and an inner ring frame 22 to form a double-layer concentric circle frame. Under the condition of the same system quality, the outer ring frame 21 and the inner ring frame 22 double-cell structure has better noise reduction ability in the low-frequency band than the single-cell structure.

[0034] Specifically, during installation, the centers of the outer ring frame 21 and the inner ring frame 22 coincide, and the acoustic metamaterial body 1 only closes one side of the outer ring frame 21 and the inner ring frame 22, while the other side is open. There are symmetrically distributed slots in the outer ring frame 21.

[0035] In some embodiments, as Figure 3As shown, the connecting member 23 includes a sleeve 231, a screw 232 and a push pin 233. The sleeve 231 is fixedly connected to the outer periphery of the inner ring frame 22, the screw 232 is connected to the inner thread of the sleeve 231, and the push pin 233 is fixedly connected to the end of the screw 232 away from the sleeve 231. The push pin 233 is inserted into the limiting groove of the outer ring frame 21.

[0036] Specifically, two sleeves 231 are provided, and the sleeves 231 are symmetrically distributed on the outer circumference of the inner ring frame 22. The sleeves 231 are processed with internal threaded holes that are compatible with the screw 232. The ejector pin 233 is processed with protrusions that are compatible with the symmetrically distributed grooves in the outer ring frame 21.

[0037] In addition, the outer ring frame 21 and the inner ring frame 22 can be fixed using other connection structures. While the outer ring frame 21 and the inner ring frame 22 are in a concentric state, the outer ring frame 21 and the inner ring frame 22 can also be directly connected to the external air duct.

[0038] In some embodiments, as Figure 5 As shown, the locking member 24 includes a collar 241 and a positioning pin 242;

[0039] The inner cavity of the collar 241 is adapted to the outer diameter of the outer ring frame 21 , the acoustic metamaterial body 1 is located between the collar 241 and the outer ring frame 21 , and the collar 241 is connected to the outer ring frame 21 via a positioning pin 242 ;

[0040] Specifically, the collar 241 is machined with an inner edge, which is designed to press the acoustic metamaterial body 1 onto the outer ring frame 21. Four positioning pins 242 are provided, and the outer walls of the positioning pins 242 are machined with threads. The positioning pins 242 are used to fix the position of the collar 241 on the outer ring frame 21.

[0041] In addition, the outer ring frame 21 and the acoustic metamaterial body 1 can also be directly connected by glue.

[0042] In some embodiments, as Figure 1 As shown, the acoustic metamaterial body 1 is a latex film.

[0043] The acoustic metamaterial body 1 is made of latex film and is fixed at the top openings of the outer ring frame 21 and the inner ring frame 22. The latex film area is divided into two parts, a central circular area and an outer annular area.

[0044] In some embodiments, as Figure 4 As shown, the outer ring frame 21 and the inner ring frame 22 are both made of ethylene and vinyl acetate copolymer.

[0045] Specifically, the outer ring frame 21 and the inner ring frame 22 are made of ethylene and vinyl acetate copolymer, taking advantage of the good flexibility, elasticity and chemical corrosion resistance of ethylene and vinyl acetate copolymer.

[0046] In some embodiments, as Figure 3 As shown, the outer ring frame 21 and the inner ring frame 22 are arranged in concentric circles.

[0047] The outer ring frame 21 and the inner ring frame 22 are designed to be concentric, which facilitates supporting the acoustic metamaterial body 1 .

[0048] In some embodiments, as Figure 4 As shown, the thickness of the inner ring frame 22 is 0.3-0.5 mm.

[0049] The thickness of the inner ring frame 22 is designed to be 0.3-0.5 mm so that the inner ring frame 22 and the acoustic metamaterial body 1 have sufficient contact.

[0050] In some embodiments, as Figure 4 As shown, the radius of the outer ring frame 21 is 6-8 mm.

[0051] Specifically, the inner radius of the outer ring frame 21 is set to 6-8 mm, which is smaller than or equal to the radius of the acoustic metamaterial body 1 , so as to facilitate attaching the acoustic metamaterial body 1 to the outer ring frame 21 .

[0052] In some embodiments, as Figure 1 As shown, the outer ring frame 21 and the inner ring frame 22 have the same height.

[0053] It should be noted that the heights of the outer ring frame 21 and the inner ring frame 22 are consistent, which facilitates the smooth connection of the top edges of the outer ring frame 21 and the inner ring frame 22 with the acoustic metamaterial body 1, and the outer ring frame 21 is sleeved on the outer layer of the inner ring frame 22 to better form a twin-cell coupling structure to support the acoustic metamaterial body 1.

[0054] In some embodiments, as Figure 1 As shown, the outer circumference of the outer ring frame 21 is processed with grooves that match the positioning pins 242 , and the grooves are evenly distributed along the outer ring frame 21 .

[0055] There are four slots designed, and the slots correspond to the positioning pins 242 to facilitate the ring 241 to fix the acoustic metamaterial body 1 at the opening of the outer ring frame 21.

[0056] The working principle of this application is described below with a preferred embodiment:

[0057] Place the inner ring frame 22 at the center of the outer ring frame 21, then rotate the screw 232 in the sleeve 231, and the screw 232 drives the ejector pin 233 to be placed in the slot of the outer ring frame 21, thereby fixing the use position of the inner ring frame 22. Place the inner ring frame 22 and the outer ring frame 21 flat on the table (or other flat surface), cover the circular acoustic metamaterial body 1 on the top of the outer ring frame 21, and then place the ring 241 on the outer ring frame 21. Use the inner edge of the ring 241 to press the acoustic metamaterial body 1 onto the outer ring frame 21, and use the positioning pin 242 to connect the ring 241 and the outer ring frame 21, thereby completing the assembly of the inner ring frame 22, the outer ring frame 21 and the acoustic metamaterial body 1.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An acoustic metamaterial structural component with a double-layer frame, comprising an acoustic metamaterial body (1), characterized in that: A bearing assembly (2) is mounted on the acoustic metamaterial body (1), and the bearing assembly (2) is used to support the acoustic metamaterial body (1); The bearing assembly (2) comprises an outer ring frame (21), an inner ring frame (22), a connecting piece (23) and a locking piece (24); The outer ring frame (21) is located at the bottom of the acoustic metamaterial body (1), the acoustic metamaterial body (1) is connected to the outer ring frame (21) via the locking piece (24), the inner ring frame (22) is located in the cavity of the outer ring frame (21), and the inner ring frame (22) is connected to the outer ring frame (21) via the connecting piece (23).

2. The acoustic metamaterial structural component with a double-layer frame according to claim 1, characterized in that: The connecting member (23) includes a sleeve (231), a screw (232) and a push pin (233); The sleeve (231) is fixedly connected to the outer periphery of the inner ring frame (22), the screw rod (232) is internally threadedly connected to the sleeve (231), the ejector pin (233) is fixedly connected to one end of the screw rod (232) away from the sleeve (231), and the ejector pin (233) is inserted into the limiting groove of the outer ring frame (21).

3. The acoustic metamaterial structural component with a double-layer frame according to claim 1, characterized in that: The locking member (24) includes a collar (241) and a positioning pin (242); The inner cavity of the collar (241) is adapted to the outer diameter of the outer ring frame (21); the acoustic metamaterial body (1) is located between the collar (241) and the outer ring frame (21); and the collar (241) is connected to the outer ring frame (21) via the positioning pin (242).

4. The acoustic metamaterial structural component with a double-layer frame according to claim 1, characterized in that: The acoustic metamaterial body (1) is a latex film.

5. The acoustic metamaterial structural component with a double-layer frame according to claim 1, characterized in that: The outer ring frame (21) and the inner ring frame (22) are both made of ethylene and vinyl acetate copolymer.

6. The acoustic metamaterial structural component with a double-layer frame according to claim 1, characterized in that: The outer ring frame (21) and the inner ring frame (22) are arranged in concentric circles.

7. The acoustic metamaterial structural component with a double-layer frame according to claim 1, characterized in that: The thickness of the inner ring frame (22) is 0.3-0.5 mm.

8. The acoustic metamaterial structural component with a double-layer frame according to claim 1, characterized in that: The radius of the outer ring frame (21) is 6-8 mm.

9. The acoustic metamaterial structural component with a double-layer frame according to claim 1, characterized in that: The outer ring frame (21) and the inner ring frame (22) have the same height.

10. The acoustic metamaterial structural component with a double-layer frame according to claim 3, characterized in that: The outer periphery of the outer ring frame (21) is processed with a clamping groove adapted to the positioning pin (242), and the clamping grooves are evenly distributed along the outer ring frame (21).

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