CN219128237U

CN219128237U - Backplate based on negative poisson's ratio structure

Info

Publication number: CN219128237U
Application number: CN202223549352.1U
Authority: CN
Inventors: 田豪; 李鹏举; 刘璎汉; 陈锋; 赵喆
Original assignee: Xian University of Architecture and Technology
Current assignee: Xian University of Architecture and Technology
Priority date: 2022-12-29
Filing date: 2022-12-29
Publication date: 2023-06-06
Anticipated expiration: 2032-12-29

Abstract

A guard board based on a negative Poisson ratio structure comprises an outer stress layer, a negative Poisson ratio filling layer and a bonding layer; the negative poisson ratio filling layer is arranged between the outer stress layer and the attaching layer, and the three layers are fixed in an attaching mode, and the negative poisson ratio filling layer is a three-dimensional cell structure layer of a concave hexagon; the guard board is of a hollow structure. The filling layer adopts the concave hexagonal negative poisson ratio structure, and the overall quality is reduced because the filling layer is of a net structure, and meanwhile, the filling layer can provide better energy absorption effect to improve the buffering capacity of the filling layer because of the excellent mechanical property of the negative poisson ratio structure. Meanwhile, the carbon fiber material adopted by the outside is light in weight and high in strength, and is not easy to damage when external force is received. The adhesive layer adopts silica gel, so that friction force can be increased, and the adhesive layer is soft and does not generate uncomfortable feeling.

Description

Backplate based on negative poisson's ratio structure

Technical Field

The utility model relates to the technical field of motion protection, in particular to a guard plate based on a negative poisson ratio structure.

Background

During exercise, a vigorous physical challenge is frequently generated, and if the player's body is kicked during the challenge, serious injury is caused. Therefore, the proper protection guard board is also required by athletes to wear, and the guard board with good protection performance is essential for protecting the athletes.

The currently used shields are broadly divided into three materials, wood, plastic, and titanium fibers. The structure is usually a stressed outer side, a middle filling layer and a silica gel laminating layer. However, the common materials have large weight and uncomfortable wearing, and meanwhile, the existing guard plates have insufficient capability of absorbing impact energy, so that the protection of athletes is insufficient.

Disclosure of Invention

The utility model aims to provide a guard plate based on a negative poisson ratio structure so as to solve the problems.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

a guard board based on a negative Poisson ratio structure comprises an outer stress layer, a negative Poisson ratio filling layer and a bonding layer; the negative poisson ratio filling layer is arranged between the outer stress layer and the attaching layer, and the three layers are fixed in an attaching mode, and the negative poisson ratio filling layer is a three-dimensional cell structure layer of a concave hexagon; the guard board is of a hollow structure.

Furthermore, the three-dimensional cell structure layer of the concave hexagon is formed by connecting a plurality of three-dimensional cell structures of the concave hexagon side by side.

Further, the three-dimensional cell structure of the concave hexagon is a structure formed by crossing two concave hexagons in a cross manner, and an extension piece is arranged at the waist of the concave hexagons.

Further, when the plurality of concave hexagonal three-dimensional cell structures are connected side by side, the extension pieces of the adjacent concave hexagonal three-dimensional cell structures are fixedly connected.

Further, the concave hexagonal three-dimensional cell structure is made of PC polycarbonate material.

Further, the three-layer structure is capable of conforming to the body part to be protected.

Furthermore, the outer stress layer is made of carbon fiber materials.

Further, the bonding layer is a rubber bonding layer; the rubber attaching layer is attached with lining cloth.

Compared with the prior art, the utility model has the following technical effects:

the filling layer adopts the concave hexagonal negative poisson ratio structure, and the overall quality is reduced because the filling layer is of a net structure, and meanwhile, the filling layer can provide better energy absorption effect to improve the buffering capacity of the filling layer because of the excellent mechanical property of the negative poisson ratio structure. Meanwhile, the carbon fiber material adopted by the outside is light in weight and high in strength, and is not easy to damage when external force is received. The adhesive layer adopts silica gel, so that friction force can be increased, and the adhesive layer is soft and does not generate uncomfortable feeling.

The negative poisson ratio structure adopted by the utility model can generate three deformation stages when receiving external force, the stress can be compressed and absorbed at first, the second stage is entered when the external force is large enough, the internal structure is compressed and compacted, and finally, the external force resistance can be stronger after the compaction.

The PC polycarbonate material adopted by the utility model is tough thermoplastic resin, and has high strength and elastic coefficient, high impact strength, good fatigue resistance and good dimensional stability.

The utility model adopts a three-layer structure, the outer layer high-strength stressed material is not easy to damage, the middle filling layer has good buffering and energy absorbing effects, and the third silica gel attaching layer can be well attached to the legs of athletes. The protective performance is greatly enhanced, and the protective material is very suitable for popularization and application in vigorous countermeasures.

Drawings

FIG. 1 is a cross-sectional view of the present utility model;

FIG. 2 is a three-dimensional model diagram of the present utility model;

FIG. 3 is a schematic diagram of a cell structure with a negative Poisson's ratio structure according to the present utility model;

FIG. 4 shows a negative poisson's ratio filling structure used in the present utility model, which is formed by tiling and connecting cells;

FIG. 5 is a diagram showing the stress shrinkage of a negative Poisson's ratio cell structure employed in the present utility model;

an outer stress layer 1, a negative poisson ratio filling layer 2 and a bonding layer 3.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that, as the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like are used for convenience in describing the present utility model and simplifying the description based on the azimuth or positional relationship shown in the drawings, it should not be construed as limiting the present utility model, but rather should indicate or imply that the devices or elements referred to must have a specific azimuth, be constructed and operated in a specific azimuth. Furthermore, the terms "first," "second," "third," and the like, as used herein, are used for descriptive purposes only and are not to be construed as indicating or implying any relative importance.

In the description of the present utility model, it should be noted that unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "connected" should be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

The utility model provides a guard plate based on a negative poisson ratio structure, which comprises the following components: an outer stress layer, a negative poisson ratio structural layer, a silica gel laminating layer and a lining which are designed from outside to inside.

The outer stress layer is made of carbon fiber material.

The surface is provided with the air holes, and the weight can be reduced.

The middle filling layer is filled by adopting a negative poisson ratio structure, so that the buffering energy absorption is enhanced, and the protection degree is improved.

The cell structure with the negative poisson ratio is that two concave hexagons are mutually vertically distributed in the axial direction. The negative poisson ratio structure is made of PC material.

The third lamination layer of the guard plate adopts a silica gel material to externally attach a layer of soft lining cloth.

Referring to fig. 1, a guard plate with a negative poisson's ratio structure provided in an embodiment of the present utility model includes: an outer stress layer 1, a negative poisson ratio filling layer 2 and a silica gel attaching layer 3 which are sequentially attached from outside to inside;

in the implementation, the first stress protection layer is made of carbon fiber materials, and the carbon fiber has excellent high temperature resistance and friction resistance and high strength and modulus. The diameter of the carbon fiber is only 5 microns, which is equivalent to ten to twelve times of one hair, and the strength of the carbon fiber is more than 4 times of that of the aluminum alloy. Good strength can be ensured while the material is light.

In implementation, the second filling layer is a negative poisson ratio structure, and the selected negative poisson ratio structure is a three-dimensional cell structure of a concave hexagon, as shown in fig. 3, and the negative poisson ratio cell structure is filled in the second filling layer in a combined manner and can be filled according to different appearance structures.

Referring to fig. 4, when a plurality of three-dimensional concave hexagonal structures are closely connected together, a negative poisson's ratio structure is macroscopically formed.

In the implementation, the third layer of silica gel laminating layer adopts silica gel material, not only laminating sportsman's shank that can be fine, can also increase frictional force, plays fine anti-skidding anti-drop effect to because silica gel material is softer, can also play the effect of buffering.

In practice, the body temperature of the athlete is raised and sweat is easily generated during the competition, in order to enhance the ventilation property of the guard plate, a three-dimensional model of the guard plate is provided, see fig. 2, and a plurality of elliptic ventilation holes are formed in the front face.

The negative poisson's ratio structure referred to in the present utility model is not limited to the concave hexagonal structure referred to herein, but encompasses all structures having negative poisson's ratio performance.

The foregoing is merely a preferred embodiment of the present utility model, and is not intended to limit the scope of the present utility model. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present utility model are included in the protection scope of the present utility model.

Claims

1. The guard plate based on the negative poisson ratio structure is characterized by comprising an outer stress layer (1), a negative poisson ratio filling layer (2) and a bonding layer (3); the negative poisson ratio filling layer (2) is arranged between the outer stress layer (1) and the attaching layer (3), and the three layers are fixed in an attaching mode, and the negative poisson ratio filling layer (2) is a three-dimensional cell structure layer with a concave hexagon; the guard board is of a hollow structure.

2. The guard plate based on the negative poisson ratio structure according to claim 1, wherein the concave hexagonal three-dimensional cell structure layer is formed by connecting a plurality of concave hexagonal three-dimensional cell structures side by side.

3. The guard plate based on the negative poisson ratio structure according to claim 2, wherein the concave hexagonal three-dimensional cell structure is a structure formed by crossing two concave hexagons in a crisscross manner, and extension pieces are arranged at the waist of the concave hexagons.

4. A guard plate based on a negative poisson's ratio structure according to claim 3, wherein when a plurality of concave hexagonal three-dimensional cell structures are connected side by side, extension pieces of adjacent concave hexagonal three-dimensional cell structures are fixedly connected.

5. The guard plate based on the negative poisson's ratio structure according to claim 2, wherein the concave hexagonal three-dimensional cell structure is made of PC polycarbonate material.

6. The sheeting of claim 1, wherein the three-layer structure is adapted to conform to a body part to be protected.

7. The guard plate based on the negative poisson ratio structure according to claim 1, wherein the outer stress layer (1) is made of carbon fiber material.

8. The guard plate based on the negative poisson ratio structure according to claim 1, wherein the attaching layer (3) is a rubber attaching layer; the rubber attaching layer is attached with lining cloth.