Negative Poisson's ratio structure and conch player accessory thereof

Abstract

The utility model discloses a negative Poisson's ratio structure and a conch player accessory thereof, the structure is composed of a plurality of unit bodies, each unit body is of a frame structure, the frame structure is composed of an upper transverse edge, a lower transverse edge and triangular bevel edges which are concave inwards in the left-right direction, and the frame structure is symmetrical in the left-right direction and the up-down direction by taking the center as the center. The upper and lower adjacent unit bodies are connected through transverse edges, and the left and right adjacent unit bodies are connected through triangular bevel edges; and a net bag with a negative Poisson's ratio structure is arranged, so that more unique mechanical properties are achieved, and internal components can be more tightly attached to the shell. Meanwhile, better impact resistance and energy absorption capacity are achieved, so that when the shell is damaged due to impact, internal components are still not damaged. And the stability of the self structure is ensured due to higher rigidity and strength.

Description

Technical Field

[0001] The utility model belongs to the technical field of Poisson's ratio, and in particular relates to a negative Poisson's ratio structure and conch player accessories. Background Art

[0002] Negative Poisson's ratio materials and structures undergo lateral contraction when subjected to axial compression, or lateral expansion when subjected to axial tension. These materials, also known as auxetic materials, exhibit high indentation resistance, excellent impact resistance, good sound absorption, and excellent properties such as unidirectional bending and crack propagation resistance. They are widely used in industries such as automotive, aviation, and marine. Typical negative Poisson's ratio materials and structures include foam polymers, honeycomb structures, polypropylene fibers, and certain crystalline structures.

[0003] Players have a variety of appearances and are mostly made of easy-to-process materials such as plastic or wood. Most of the structures are regular. For the conch structure with better sound amplification, its principle is to use acoustic resonance to amplify the sound through the resonance effect of the resonance cavity. There is a resonance cavity inside it. When external sound enters the resonance cavity, it will cause the air in the cavity to resonate, so that the sound is amplified. However, the traditional sound-producing structure on the market cannot be fitted into the conch, and the snail structure has to be destroyed, affecting the appearance.

[0004] Therefore, in order to better utilize the excellent acoustic characteristics of conch sound propagation and the working principle of internal structure function, the inventor adopted a negative Poisson's ratio structure, so that the conch player has the functions of audio external playback, music storage, music audio playback, enhanced bass decoration and beautification. Summary of the Invention

[0005] The purpose of the utility model is to provide a negative Poisson's ratio structure, and through the accessories designed with the negative Poisson's ratio structure, a player can be fitly placed inside a conch-shaped shell.

[0006] In order to achieve the above purpose, the technical solution adopted by the present utility model is as follows:

[0007] A negative Poisson's ratio structure, characterized in that: the structure is composed of a plurality of unit bodies, the unit bodies are in a frame structure, the frame structure is composed of an upper horizontal edge, a lower horizontal edge, and triangular oblique edges that are concave on the left and right sides. The frame structure achieves left-right and top-bottom symmetry with its center, and adjacent unit bodies above and below are connected by horizontal edges, and adjacent unit bodies on the left and right are connected by triangular oblique edges.

[0008] Furthermore, the angle A formed by the hypotenuse of the inwardly concave triangle is greater than 90°.

[0009] Furthermore, the unit body is made of polypropylene material.

[0010] Furthermore, the negative Poisson's ratio structure was fabricated by 3D printing.

[0011] A conch player accessory with a negative Poisson's ratio structure is provided. The conch player accessory is made of a cylindrical body with a negative Poisson's ratio structure. A player circuit board and a speaker are placed in the cylindrical body, and the entire conch player accessory is placed in a conch shell.

[0012] The above technical solution can achieve the following beneficial effects:

[0013] The negative Poisson's ratio structure designed in this utility model has excellent impact resistance. When the structure is subjected to an impact, its unique deformation mechanism can effectively disperse and absorb energy, thereby reducing damage to internal electrical components. It has excellent energy absorption capacity. When subjected to external forces, the unit structure deforms, effectively converting mechanical energy into internal energy, thereby achieving energy absorption. It is lightweight, reducing overall weight, and can be used in conjunction with a bionic conch player to achieve a lightweight effect. The transverse thermal expansion coefficient is opposite to the longitudinal thermal expansion coefficient, creating a fixed effect of becoming thinner when compressed forward and thicker when stretched backward, thus adapting the structure to the conch structure.

[0014] The negative Poisson's ratio net bag accessory designed in this utility model allows internal components to fit more tightly with the conch shell. It also exhibits improved impact resistance and energy absorption, ensuring that even if the shell is damaged by an impact, the internal components remain intact. Its high rigidity and strength also ensure its structural stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the negative Poisson's ratio structure.

[0016] Figure 2 This is a schematic diagram of the conch player accessories.

[0017] Figure 3 This is a schematic diagram of the conch player accessories.

[0018] In the picture:

[0019] In the figure: 1, unit body; 2, triangle hypotenuse; 3, upper horizontal side; 4, lower horizontal side. DETAILED DESCRIPTION

[0020] The present invention will be further described below with reference to the accompanying drawings:

[0021] like Figure 1As shown, a negative Poisson's ratio structure is characterized in that: the structure is composed of a plurality of unit bodies 1, the unit bodies are in a frame structure, the frame structure is composed of an upper horizontal edge 3, a lower horizontal edge 4 and a triangular oblique edge 2 that is concave to the left and right. The frame structure is symmetrical with the center to the left and right and up and down. The adjacent unit bodies above and below are connected by the horizontal edges, and the adjacent unit bodies on the left and right are connected by the triangular oblique edges.

[0022] Furthermore, the angle A formed by the hypotenuse of the inwardly concave triangle is greater than 90°.

[0023] Furthermore, the unit body is made of polypropylene material.

[0024] Furthermore, the negative Poisson's ratio structure was fabricated by 3D printing.

[0025] Figure 2-3 As shown, a conch player accessory with a negative Poisson's ratio structure is made into a cylindrical body using the negative Poisson's ratio structure. The player circuit board and speaker are placed in the cylindrical body, and the entire conch player accessory is placed in the conch shell.

[0026] Example: A conch-structured audio player shell is designed. Its natural conch structure driven by bionics combines the spiral curve characteristics and mathematical models to have good acoustic characteristics of the natural conch, so the high-frequency and low-frequency speaker audio transmission effects are better.

[0027] The negative Poisson's ratio structural net bag is printed using 3D printing technology, using PP flexible material to create a cylindrical negative Poisson's ratio three-dimensional structure, which is then used to encapsulate the internal player structure (circuit board and speaker). Because this structure has unique mechanical properties, during thermal expansion, its lateral thermal expansion coefficient is in the opposite direction to the longitudinal thermal expansion coefficient, giving the material unique thermal stability in thermal environments. This characteristic allows the structure to maintain good performance in various environments, including high temperature, low temperature, and room temperature. Therefore, placing it in the internal cavity of the spiral structure of the conch can also ensure better fit, without the need to modify the internal cavity of the conch, maximizing the good acoustic characteristics of the conch, while at the same time providing better protection for the player structure (circuit board and speaker) through the negative Poisson's ratio structural net bag.

[0028] This negative Poisson's ratio structure offers improved impact resistance and energy absorption capabilities. When subjected to external forces, its unique deformation mechanism effectively absorbs and disperses impact energy, minimizing structural damage. Furthermore, its internal structural deformation effectively converts mechanical energy into internal energy, achieving energy absorption. Furthermore, its unique mechanical properties make this structure highly versatile. Even if the external structure is damaged by an impact, the internal structure can be removed and replaced at any time.

[0029] The player structure is composed of a tweeter and a woofer, which are connected by a 3.5mm audio data cable. This ensures that the sound of the tweeter and woofer can be played normally, and after being optimized by the natural conch structure, it has a better tone.

[0030] The negative Poisson's ratio mesh bag also houses a built-in Bluetooth chip and wireless charging receiver. This allows the speaker to be charged both wired and wirelessly. This multi-charging capability makes the speaker more convenient and flexible, while the Bluetooth chip can be connected to a mobile phone for operation.

[0031] In summary, the principle of sound transmission in conch shells is exploited to eliminate short circuits between the tweeter and woofer, suppressing their acoustic resonance. By leveraging the conch shell's superior acoustic properties and the ability of bare wire to amplify sound, the conch speaker's output is made fuller, more three-dimensional, and more vivid. The flexible structure of negative Poisson's ratio material within the conch shell allows for a more precise fit between the speaker's internal components and the outer shell. This material becomes thinner when compressed forward and thicker when stretched backward, creating a fixed effect. Furthermore, when subjected to external forces, the negative Poisson's ratio material's lateral expansion counteracts these forces, significantly improving the load-bearing capacity of the internal components.

[0032] Compared to other products, this application features a negative Poisson's ratio net bag with unique mechanical properties, allowing internal components to fit more tightly to the outer shell. Furthermore, it offers superior impact resistance and energy absorption, ensuring that even if the outer shell is damaged by an impact, the internal components remain intact. Its high rigidity and strength also ensure its structural stability.

[0033] The above are all preferred embodiments of the present invention. For ordinary technicians in this technical field, without departing from the principle of the present invention, various equivalent modifications to the present invention are within the scope of protection of the claims attached to this application.

Claims

1. A negative Poisson's ratio structure, characterized in that: The structure is composed of a plurality of unit bodies, and the unit bodies are in a frame structure. The frame structure is composed of an upper horizontal edge, a lower horizontal edge, and triangular oblique edges that are concave inward on the left and right. The frame structure realizes left-right and top-bottom symmetry with the center. The upper and lower adjacent unit bodies are connected by horizontal edges, and the left and right adjacent unit bodies are connected by triangular oblique edges.

2. A negative Poisson's ratio structure according to claim 1, characterized in that: The angle A formed by the hypotenuse of the inwardly concave triangle is greater than 90°.

3. The negative Poisson's ratio structure according to claim 1, characterized in that: The unit body is made of polypropylene.

4. The negative Poisson's ratio structure according to claim 1, characterized in that: The negative Poisson's ratio structure was made by 3D printing.

5. A conch player accessory with a negative Poisson's ratio structure, characterized by: The conch player accessory is made of a cylindrical body using the negative Poisson's ratio structure described in any one of claims 1 to 4. The player circuit board and the speaker are placed in the cylindrical body, and the entire conch player accessory is placed in the conch shell.

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