Waist protection cushion for maintaining pelvis stability and lumbar vertebra physiological curvature

Abstract

The utility model relates to a waist protection cushion for maintaining pelvis stability and lumbar vertebra physiological curvature, and belongs to the technical field of ergonomic protectors. Through a bionic curved surface and biomechanical coupling system, the cushion solves the problems of non-physiological backward movement of lumbar vertebra, sacrum suspension, insufficient biomechanical synergy and the like caused by fixed encircling type side wings and single ischial support design of a traditional waist protection cushion, and has the core innovation points that 1, a central convex curved surface adopts a composite curvature structure, so that the shape of the central convex curved surface is more than that of the central convex curved surface, and the shape of the central convex curved surface is more than that of the central convex curved surface; a lumbosacral continuous supporting area is covered, local pressure concentration is reduced, and the lumbar vertebra physiological curvature is adapted; 2, the non-encircling side wing curved surfaces allow the waist to naturally twist and laterally bend through backward gradual curvature change, so that the degree of freedom of movement is improved; 3, according to the ischium bearing area, the outer edge of the ischium tuberosity is covered by 10-15 mm through the bidirectional diffusion design, the W-shaped transverse radian and the V-shaped longitudinal radian are matched with 90% or above of the hip shape (according to GB / T 10000-2023), and pressure distribution is improved;

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ergonomic protective equipment, in particular to a waist support cushion capable of achieving pelvic stability and maintaining lumbar physiological curvature through a bionic curved surface and biomechanics coupling system, and is especially suitable for lumbar and pelvic protection of people who need to sit for a long time. BACKGROUND

[0002] The backrest of the existing waist support cushion adopts a ring-type side wing design, which can provide lateral support but limits the natural movement of the human waist (such as twisting and lateral bending), and long-term use can easily lead to muscle stiffness. In addition, the ischial support area of the traditional cushion is often designed with a flat surface or a single radius, which cannot adapt to different hip shapes, resulting in uneven pressure distribution and aggravating the load on the lumbar spine, and has the following defects: 1. The central lumbar support is delayed, and the ring-type side wing forces the lumbar spine to be in a non-physiological backward state, which cannot provide effective support; 2. The sacrum is suspended: most traditional cushions do not cover the sacral support area; 3. Insufficient biomechanics coordination: the ischial bearing area and the lumbar support part work independently, lack of mechanical coupling, only solve the single sitting problem, and cannot meet the overall support needs of the human spine and muscles in different sitting positions. SUMMARY

[0003] Technical solution: bionic lumbar support backrest and ischial bearing area; the bionic lumbar support backrest includes a central convex curved surface and two non-ring-type side wings continuously extending rearward, the central convex curved surface has an S-shaped continuous curvature change in the sagittal plane to adapt to the physiological curvature of the lumbar spine to the sacrum, and the curvature radius direction in the coronal plane is consistent with the anatomical direction of the lumbar transverse process; the non-ring-type side wing curved surface gradually changes in curvature toward the rear to form a non-ring-type side wing; the ischial bearing area includes a bidirectional diffusion curved surface centered on the ischial tuberosity area, and the lateral expansion angle of the bidirectional diffusion curved surface is positively correlated with the ischial tuberosity spacing. Technical effect: the convex height point of the central convex curved surface is located between the second and fourth lumbar vertebrae, and the curvature radius change direction in the sagittal plane is adapted to the physiological curvature axis of the spine; the non-ring-type side wing curved surface of the backrest gradually changes in curvature toward the rear, and the non-vertical included angle of the free edge of the side wing is 5-30°; the bidirectional diffusion curved surface of the ischial bearing area forms a W-shaped arc in the coronal plane and a V-shaped arc in the sagittal plane, and the lateral expansion range covers the outer edge of the ischial tuberosity projection area by 10-15mm, which adapts to more than 90% of hip shapes; the bionic lumbar support backrest and the ischial bearing area work together to control the dynamic change of the lordotic angle of the lumbar spine in the forward inclination / rearward inclination state of the pelvis.

[0004] Technical effects: The height of the central convex curved surface is located between the second and fourth lumbar vertebrae, and the direction of the change in the sagittal plane curvature radius matches the physiological curvature axis of the spine; the non-encircling side wings of the backrest have a gradually changing curvature towards the rear, and the non-perpendicular angle of the free edge of the side wings is 5-30°; the bidirectional diffusion curved surface of the ischial bearing area forms a W-shaped arc in the coronal plane and a V-shaped arc in the sagittal plane, with a lateral expansion range covering the outer edge of the ischial tuberosity projection area by 10-15mm, adapting to more than 90% of hip shapes; the bionic lumbar support backrest and the ischial bearing area work together to control the dynamic changes in the lumbar lordosis angle under pelvic tilt / retrograde states. Attached Figure Description

[0005] Figure 1 3D diagram of a lumbar support seat cushion;

[0006] Figure 2 : Schematic diagram of the three-dimensional structure of the lumbar support cushion (schematic diagram of the bionic lumbar support backrest and ischial tuberosity bearing area);

[0007] Figure 3 Top view of the lumbar support cushion and schematic diagram of the biomimetic lumbar support backrest structure and coronal plane angle;

[0008] Figure 4 : Main view of the lumbar support cushion and schematic diagram of the W-shaped ischial tuberosity support area;

[0009] Figure 5 Left view of the lumbar support cushion and schematic diagram of the V-shaped load-bearing area structure;

[0010] Figure 6 3D sectional view of a lumbar support seat cushion;

[0011] Figure 7 Diagrams illustrating the biomechanical function of the lumbar support cushion and the physiological curvature from the lumbar spine to the sacrum; Detailed Implementation

[0012] Please refer to Figures 1-6 The lumbar support cushion is composed of an integrally molded support frame and a buffer layer, and is divided into an upper and lower linked lumbar and sacral support backrest (A1-A4) and ischial bearing areas (B1-B4), forming a biomechanical coupling system. The lumbar and sacral support backrest is divided into a central raised area A1 (lumbar support area), a sacral support area A2, and lateral wing areas A3 and A4 extending backward on both sides, which together form a gradient support structure to support the lumbar spine and sacrum. The ischial bearing areas are divided into the ischial support central areas B1 and B2 and the remaining bearing areas B3 and B4. The lumbar and sacral support backrest and the ischial bearing areas work together to achieve the functional structure of maintaining pelvic stability and the physiological curvature of the lumbar spine.

[0013] Please refer to Figure 7The maximum convex height point of the central convex curved surface corresponds to the highest point section of the lumbar physiological curvature, and the section covers the first to fifth lumbar physiological curvature adaptation area.

[0014] Please refer to Figure 3 The backrest side wing curved surfaces A3 and A4 continuously extend to the rear sides, and the rear curvature gradually changes to form a non-encircling side wing structure. The non-encircling side wing curved surface gradually changes in the rear curvature. The non-perpendicular included angle of the side wing edge is 5-30°, which can provide local fitting lateral support for the waist during natural twisting and lateral bending activities of the human body, meet the lateral freedom requirement in the natural activity mode of the human body, and the two sides are non-encircling, which is suitable for most waist dimensions.

[0015] Please refer to Figure 3 、 Figure 7 The sagittal plane curvature radius of the central convex region A1 adapts to the lumbar physiological curvature to form an elliptical parabolic surface structure, and the lumbar support backrest and the ischial bearing area form a near-vertical angle. The neutral position sitting posture adapts to most waist curvatures.

[0016] Please refer to Figure 2 The ischial tuberosity bearing surfaces B1 and B2 are bidirectional diffusion curved surfaces, and the transverse development range covers the outer edge of the ischial tuberosity projection area by 10-15 mm. The transverse development angle of the bidirectional diffusion curved surface is positively correlated with the ischial tuberosity interval, that is, the larger the ischial tuberosity interval, the larger the transverse development angle, so as to adapt to different body types of users.

[0017] Please refer to Figure 2 、 Figure 7 At the lumbosacral joint, that is, the fifth lumbar vertebra and sacrum connection area, it has its particularity in statics: the body weight on the fifth lumbar vertebra is decomposed into two forces: one force acts on the sacral bottom, and the other force tends to slide forward, like on a slide; if the sacral bottom inclination increases, the lumbar pressure increases, so the importance of A1 sacrum support and A2 sacrum support is emphasized in the structural design of the lumbosacral backrest area.

Claims

1. A lumbar support cushion for maintaining pelvic stability and the physiological curvature of the lumbar spine, characterized in that... include: The biomimetic lumbar support backrest and ischial bearing area; the biomimetic lumbar support backrest includes a central convex curved surface and two non-encircling side wings that extend continuously backward on both sides. The central convex curved surface has an S-shaped continuous curvature change in the sagittal plane to adapt to the physiological curvature of the lumbar spine to the sacrum, and the direction of the curvature radius in the coronal plane is consistent with the anatomical direction of the transverse processes of the lumbar spine; the non-encircling side wings have a gradually changing curvature backward to form non-encircling side wings; the ischial bearing area includes a bidirectional diffusion curved surface centered on the ischial tuberosity area, and its lateral expansion angle is positively correlated with the distance between the ischial tuberosities.

2. The lumbar support cushion for maintaining pelvic stability and lumbar physiological curvature according to claim 1, characterized in that: The height of the central convex surface is located between the second and fourth lumbar vertebrae, and the direction of change of the sagittal plane curvature radius is adapted to the physiological curvature axis of the spine.

3. The lumbar support cushion for maintaining pelvic stability and lumbar physiological curvature according to claim 1, characterized in that: The non-encircling side wing curves of the backrest have a gradually changing rearward curvature, and the non-vertical included angle of the free edge of the side wing is 5-30°.

4. The lumbar support cushion for maintaining pelvic stability and lumbar physiological curvature according to claim 1, characterized in that: The bidirectional diffusion surface of the ischial bearing area forms a W-shaped arc in the coronal plane and a V-shaped arc in the sagittal plane. The lateral expansion range covers the outer edge of the ischial tuberosity projection area by 10-15mm, which is suitable for more than 90% of buttock shapes.

5. The lumbar support cushion for maintaining pelvic stability and lumbar physiological curvature according to claim 1, characterized in that: The biomimetic lumbar support backrest works in synergy with the ischial tuberosity bearing area to control the dynamic changes in the lumbar lordosis angle under pelvic tilt / retrograde states.

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