阅读说明：本技术 一种基于内凹六边形负泊松比元胞结构的汽车座椅 (Car seat based on cellular structure of interior concave hexagon negative poisson ratio ) 是由 梁帅 周冠 闫鹏飞 李祥 郝岩 王鑫 于 2021-08-30 设计创作，主要内容包括：本发明提供一种基于内凹六边形负泊松比元胞结构的汽车座椅,包括头枕区、靠背区、坐垫区和座椅骨架,其特征在于,所述坐垫区包括用于缓冲的多层负泊松比结构以及填充于多层负泊松比结构之间的填充物；所述多层负泊松比结构由多个负泊松比元胞阵列而成,所述元胞的胞壁呈规则的内凹六边形状。本发明的负泊松比结构可以充分抵抗来自驾乘人员对于座椅的载荷压力,此外,当汽车在急加速状态下,本发明可以提高垫背以及靠枕的吸能效率,使后背所受到的冲击力更加平稳,大大改善驾乘人员的驾乘体验和舒适性。从汽车轻量化角度考虑,负泊松比结构与传统结构相比,质量大大减少,减少了整车质量,节约了汽车的行驶成本以及节省了汽车的内部空间。(The invention provides an automobile seat based on an inwards concave hexagonal negative Poisson ratio cellular structure, which comprises a headrest area, a backrest area, a cushion area and a seat framework, and is characterized in that the cushion area comprises a plurality of layers of negative Poisson ratio structures for buffering and fillers filled among the layers of negative Poisson ratio structures; the multilayer negative Poisson ratio structure is formed by a plurality of negative Poisson ratio cell arrays, and the cell walls of the cells are in regular concave hexagonal shapes. The negative Poisson ratio structure can fully resist the load pressure of a driver and a passenger on the seat, and in addition, when the automobile is in a rapid acceleration state, the negative Poisson ratio structure can improve the energy absorption efficiency of the cushion back and the back cushion, so that the impact force on the back is more stable, and the driving experience and the comfort of the driver and the passenger are greatly improved. From the light-weighted angle of car, negative poisson ratio structure compares with traditional structure, and the quality significantly reduces, has reduced whole car quality, has practiced thrift the cost of going of car and has saved the inner space of car.)

1. An automobile seat based on an inwards concave hexagonal negative Poisson ratio cellular structure comprises a headrest area (1), a backrest area (2), a cushion area (3) and a seat framework (4), and is characterized in that the cushion area (3) comprises a plurality of layers of negative Poisson ratio structures for buffering and fillers filled among the layers of negative Poisson ratio structures; the multilayer negative Poisson ratio structure is formed by a plurality of negative Poisson ratio cell arrays, and the cell walls of the cells are in regular concave hexagonal shapes.

2. The vehicle seat based on the interior hexagonal negative poisson's ratio cell structure of claim 1, wherein the negative poisson's ratio cells have equal thickness of cell walls, and each negative poisson's ratio cell structure is the same size.

3. The vehicle seat based on the cellular structure of concave hexagonal negative poisson's ratio of claim 1, wherein the negative poisson's ratio structure is 2 layers or more.

4. The vehicle seat based on the cellular structure with concave hexagonal negative poisson's ratio as claimed in claim 1, wherein the material of the multi-layer negative poisson's ratio structure is EVA resin material.

5. The vehicle seat based on the cellular structure with concave hexagonal negative poisson's ratio as claimed in claim 1, wherein the filler between the multiple layers of negative poisson's ratio structures is polyurethane sponge.

Technical Field

The invention relates to an automobile seat, in particular to an automobile seat based on an inwards concave hexagonal negative Poisson ratio cellular structure.

Background

At present, the foaming material of the automobile seat is generally foamed by adopting polyurethane soft material, and is obtained by reacting isocyanate, polyether or polyester polyol and other auxiliary agents. The foaming provides the shape and contour of the seat, and the characteristics of the foaming affect the comfort and H-point of the ride. The seat has good support performance, but is hard, so that the riding experience of a driver and a passenger is seriously influenced, and the seat is extremely uncomfortable especially in long-distance travel. Thus, the increase in the demand for riding experience of people cannot be achieved.

When a material is subjected to unidirectional stress or compression, the poisson ratio is the ratio of the absolute value of transverse positive strain to axial positive strain, and is also called a transverse deformation coefficient, and is an elastic constant representing transverse deformation of the material. The negative poisson's ratio effect describes how a material expands laterally in the elastic range when stretched and contracts laterally in the elastic range when compressed. Compared with the traditional (common) poisson ratio material, the negative poisson ratio material has many incomparable advantages compared with other materials in nature due to the special properties different from common materials, in particular to the physical and mechanical properties of the material, such as the improvement of the shear modulus of the material, the clearance of the material, the reduction of the quality of the material and the like.

Negative poisson's ratio materials are increasingly common in our daily lives. The negative Poisson ratio material vertically contracts in the lateral direction of the stress direction, expands in the stress direction when being subjected to external force compressive stress, and can offset the influence of external stress after expansion, so that the load resistance of the equipment is improved.

Disclosure of Invention

In order to overcome the defects, the invention provides an automobile seat based on an inwards concave hexagonal negative poisson ratio cellular structure.

The invention adopts the following technical scheme for solving the technical problems:

an automobile seat based on an inwards concave hexagonal negative Poisson ratio cellular structure comprises a headrest area, a backrest area, a cushion area and a seat framework, wherein the cushion area comprises a plurality of layers of negative Poisson ratio structures for buffering and fillers filled among the layers of negative Poisson ratio structures; the multilayer negative Poisson ratio structure is formed by a plurality of negative Poisson ratio cell arrays, and the cell walls of the cells are in regular concave hexagonal shapes.

Furthermore, the cell wall thickness of the negative poisson ratio cellular is equal, and the size of each negative poisson ratio cellular structure is the same.

Further, the negative poisson's ratio structure is more than or equal to 2 layers.

Furthermore, the multilayer negative poisson's ratio structure is made of EVA resin materials.

Further, the filler among the multiple layers of negative Poisson ratio structures is polyurethane sponge.

Compared with the prior art, the invention adopting the technical scheme has the following technical effects:

1. the cushion area of the invention is composed of a negative poisson ratio structure, and can greatly improve the buffer and vibration damping performance of the seat when being subjected to external load pressure, so that the impact force applied to drivers and passengers becomes more stable, the safety during collision is enhanced, and the comfort of the seat is improved.

2. The negative Poisson ratio cellular structure adopts an inwards concave hexagonal structure, and when the upper side and the lower side of the hexagon are subjected to axial pressure, cell walls on the two sides can contract inwards and narrow, so that the longitudinal thickness can be greatly increased. In the process of collision deformation, the longitudinal thickness is increased, the external load pressure can be fully offset and buffered, therefore, the change of the pressure on the seat can be very stable, the impact on the seat caused by collision of a driver and an automobile seat is reduced, the safety of the seat is improved, and the riding experience of the driver and the passenger is improved.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural diagram of the concave hexagonal cell structure array.

In fig. 1, 1 is a headrest area, 2 is a backrest area, 3 is a cushion area, and 4 is a seat frame.

Detailed Description

The technical scheme of the invention is further explained in detail by combining the attached drawings:

as shown in fig. 1, the present invention discloses an automobile seat based on a concave hexagonal negative poisson's ratio cellular structure, which includes a seat frame 4 for supporting the seat, a cushion area 3 for a driver and an occupant to sit on, and a backrest area 2 and a headrest area 1 for providing support to the back and head of the occupant.

The cushion area 3 comprises a plurality of layers of negative Poisson ratio structures for buffering and fillers filled between the layers of negative Poisson ratio structures; the multilayer negative Poisson ratio structure is formed by a plurality of negative Poisson ratio cell arrays, and the cell walls of the cells are in regular concave hexagonal shapes. The cell wall thickness of the negative poisson ratio cells is equal, and the size of each negative poisson ratio cell structure is the same. The negative Poisson ratio structure is more than or equal to 2 layers. The material of multilayer negative poisson ratio structure is EVA resin material, and the filler between the multilayer negative poisson ratio structure is the polyurethane sponge, and seat contact plane materiel chooses for use ordinary artificial leather material.

The width of the size of the cushion area 3 is 530mm, the length is 640mm, the width of the negative poisson's ratio material is 470mm, the length is 580mm, and the cross section of the three-dimensional negative poisson's ratio structure is formed by 8 multiplied by 2+7 unit cell arrays.

The single-cell structure of the negative Poisson ratio material is an inner concave hexagon, the cross section of the whole negative Poisson ratio material structure is shown in figure 1, the two inner concave hexagons are connected through an upper cell wall and a lower cell wall to form a unit, the units are connected through a left cell wall and a right cell wall of the inner concave hexagon, the units are transversely arrayed to form the cross section of the negative Poisson ratio material, and the cross section is stretched along the cross section direction shown in figure 1 to form the whole negative Poisson ratio material structure shown in figure 2.

When the upper and lower sides of the hexagon are subjected to axial pressure, the cell walls on the two sides shrink inwards to narrow, so that the longitudinal thickness is greatly increased. In the collision deformation process, the longitudinal thickness increase can fully offset and buffer the external load pressure, and the driving safety and comfort are both considered.

The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.