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Cushion structure

A technology of structure and cushion, applied in the field of cushion structure, can solve the problems of large deformation, large sinking, muscle deformation, etc.

Inactive Publication Date: 2004-07-07
DELTA TOOLING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, when the load characteristic of the cushion part is higher than that of the muscle, and the shape difference between the cushion part and the muscle is large, due to the reaction force from the cushion part (mainly in the normal direction in the hard cushion part) force, in cushion parts that are harder but softer than muscles, mainly the force in the shear direction), the muscles are greatly deformed and compressed, resulting in a shift in blood flow or an increase in the burden on the muscles
On the other hand, when the load characteristic of the cushion part is significantly lower than that of the muscle, the deformation of the muscle can be suppressed, but the deformation of the cushion part is large and the amount of sinking is large, so it mainly works by shear force , but brought about an increase in muscle burden
For example, in the case of laminating soft urethane foam board and viscoelastic urethane foam, compared with the case of using other materials, relatively soft load characteristics can be produced, but because of the amount of deformation of the cushion part Large, so there is a problem of increasing the burden on the muscles due to the above-mentioned shearing force

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-5

[0165] about figure 1 The first embodiment shown (Example 1), figure 2 The second embodiment (Example 2) shown, image 3 The 3rd embodiment (Example 3) shown, Figure 4 The fourth embodiment shown (Example 4), Figure 5 The load characteristics of the entire cushion structure of the fifth embodiment (Example 5) shown were measured. In addition, the three-dimensional braided fabric used as the upper elastic members 11, 21, 31 in Embodiment 1-3 and the first and sixth elastic members 51, 56 in Embodiment 5 was obtained in the above-mentioned Test Example 2. The material used in is laid with 0% elongation so that the longitudinal direction of the convex part is along the gap direction between the side frames. In Example 4, the material used in the above-mentioned Test Example 1 was used as the upper elastic member 41 . The measurement was performed by pressing a circular compression plate with a diameter of 98 mm to 100 N (about 10 kg) from the surface of the three-dimensio...

Embodiment 6

[0171] will have as Figure 10 as well as Figure 11 The three-dimensional braided fabric with concave and convex portions shown (Example 6) was placed on a flat plate, and the size (diameter) of the pressing plate was changed to measure the load characteristics. The result is as Figure 17-Figure 19 shown. Figure 17In the case of using a pressure plate with a diameter of 30mm and pressing to 100N, Figure 18 In the case of using a pressure plate with a diameter of 98mm and pressing to 100N, Figure 19 This is a case where a pressure plate with a diameter of 200 mm is used to pressurize to 1000 N. In addition, the speed of all the pressing plates was 50 mm / min. In addition, in all cases, except that no concavo-convex part was formed by vibration melting, the same procedure was carried out for a three-dimensional knitted fabric (comparative example) without a concavo-convex part structure produced under exactly the same conditions as in Example 6. Determination.

[0172...

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Abstract

A cushioning structure effective to alleviate a blood stream trouble and loads on muscles and to prevent an outbreak of trouble caused by them such as economy-class syndrome and the like is provided. The structure includes an upper elastic member 11 composed of a three-dimensional net member formed by connecting a pair of ground knitted fabrics disposed apart from each other using connecting yarn, and a spring constant in the range of initial load during a pressurizing process is set in the range of 0.1 to 20 N / mm and, at the same time, during a restoring process, a spring constant after restoring to an amount of displacement of 20 mm or less, at the latest, to 2 mm, is set to be lower than the spring constant in the range of initial load during the aforementioned pressurizing process. As a result, when a person comes into contact with a cushioning member by a sitting movement or a standing movement, temporal set in fatigue (stroke) of about several millimeters to about ten and several millimeters is created, thereby improving a feeling of fitting (compatibility) which makes a person feel comfortable, and effectively alleviate a blood stream trouble and loads on muscles.

Description

technical field [0001] The present invention relates to a cushion structure including a three-dimensional braided fabric, in particular to a cushion structure suitable for making a seat structure that reduces blood flow obstruction or muscle burden. technical background [0002] In recent years, a seat cushion structure using a three-dimensional mesh material (three-dimensional woven fabric) having a large number of voids and excellent air permeability has become known. The three-dimensional three-dimensional knitted fabric is a three-dimensional structure made by combining a pair of ground knitted fabrics arranged separately from each other with a plurality of connecting yarns, and is excellent in air permeability, body pressure distribution characteristics, and rebound elasticity. [0003] However, when the load characteristic of the cushion part is higher than that of the muscle, and the shape difference between the cushion part and the muscle is large, due to the reactio...

Claims

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Application Information

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IPC IPC(8): A47C7/28A47C7/00A47C7/35A47C27/12B60N2/90B68G11/02D04B21/14
CPCD04B21/12D10B2403/0221A47C27/122D10B2505/08Y10T442/102Y10T442/40Y10T442/413A47C27/12
Inventor 上野义雪藤田悦则川崎诚司小仓由美菊水美穗
Owner DELTA TOOLING CO LTD