Lumbar support cushion used to maintain pelvic stability and lumbar spine physiological curvature

Abstract

This invention herein relates to lumbar support cushion used to maintain pelvic stability and lumbar spine physiological curvature, belonging to technical field of ergonomic protective gear. The cushion uses bionic curved surface and biomechanical coupling system to solve problems of non-physiological posterior displacement of the lumbar spine, sacrum suspension and insufficient biomechanical coordination caused by fixed embracing side wings and single sciatic support of traditional lumbar cushions. The core innovations include: 1. Central convex curved surface adopts composite curvature structure to cover the continuous support area of the lumbar sacrum; 2. Non-embracing side wings curved surface allows natural waist twisting and lateral bending through the gradual change of curvature toward the back; 3. Sciatic bearing area adopts two-way diffusion covers the outer edge of ischial tuberosity by 10-15 mm, and W-shaped and V-shaped arcs are adapted to more than 90% of hip shapes (according to GB / T 10000-2023).

Description

TECHNICAL FIELD

[0001] This invention herein relates to the technical field of ergonomic protective gear, particularly relates to the lumbar support cushion used to maintain pelvic stability and lumbar spine physiological curvature through the bionic curved surface and biomechanical coupling system; and it is particularly suitable for protecting the lumbar spine and pelvis of people who need to long-time sitting.BACKGROUND OF THE PRESENT INVENTION

[0002] The existing cushions of lumbar support are mostly designed with embracing side wings. Although the lateral support can be supported, the natural movement of the human waist is limited (such as twisting and lateral bending). Long-term use can easily lead to muscle stiffness. In addition, the sciatic bearing area of traditional cushions often adopts the flat or single arc design, 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 lagging, and the embracing side wings force the lumbar spine to be in the non-physiological backward state, which cannot provide effective support; 2. The problem of sacrum suspension: Most traditional cushions do not cover the sacral support area; 3. Insufficient biomechanical coordination: The sciatic bearing area and the lumbar support components operate independently, lacking mechanical coupling, only solving the problem of one single sitting posture, and cannot meet the comprehensive support needs of the human body for the spine and muscles in different sitting postures.SUMMARY OF PRESENT INVENTION

[0003] Technical Solution: The core of the present invention herein is to construct the bionic dynamic coupling system, including the following innovative structures: 1. the central convex curved surface: the composite curvature structure is adopted, the radius of curvature of the coronal plane is consistent with the anatomical direction of the lumbar transverse process anatomy (radius r=50-80 mm, quoted from Gray's Anatomy), the convex height point is located between the second lumbar vertebra and the fourth lumbar vertebra; through bionic modeling optimization, continuous support from the first lumbar vertebra to the fifth lumbar vertebra and sacrum is achieved; and the full-fit support design is adopted for the lumbar sacral area to reduce local pressure concentration; this design is different from most products on the market that have the lumbar spine slightly bent backward and the sacrum suspended without support; it can better support the physiological curvature of the waist; 2. dynamic side wing curvature: the curvature of the side wings decreases gradually from the center to the back of the two sides; the curvature change rate matches the human body's lateral bending / torsion range of motion, ensuring the balance between the support and freedom during lateral motion; different from the embracing cushion designed on the market, this design focuses on strengthening the raised support effect of the middle lumbar sacrum; the two sides can move freely, adapting to most waist dimensions; 3. sciatic bearing area: the bidirectional diffusion surface is expanded horizontally to cover the outer edge of the ischial tuberosity projection area by 10-15 mm (suitable for 90% of hip shapes according to GB / T 10000-2023); the longitudinal extension is nonlinearly related to the sacral length; the arc-shaped wrapping design from the sciatic area to the front and back; the W-shaped in width and V-shaped longitudinal arcs are adapted to most of hip shapes; 4. biomechanical coupling system: the central curved surface and the sciatic curved surface are linked through the mechanical interaction conduction module, automatically adjusting the direction of the support forces when the pelvis tilts forward / backward; the angle between the support force vector and the spine axis is ≤15°, maintaining the safe pressure threshold of the intervertebral disc, which is better than the existing fixed-angle support design and can effectively maintain pelvic stability and lumbar physiological curvature.

[0004] Technical effects: a. dynamic adaptability: it covers 90% of adult body types in GB / T 10000-2023, providing appropriate support for people of different body types; b. multi-degree-of-freedom support: the gradient change rate of the side wing curvature is improved compared to the traditional design, which directly expands the free rotation range of the waist; it supports the waist without restricting the natural movement of the waist, allowing people to twist and bend freely when using the lumbar-support cushion; c. mechanical synergistic optimization: the coupling system reduces the load on the lumbar spine, and reduces the pressure on the spine (including the intervertebral disc) and the back; it also supports and protects the physiological curvature of the waist, and supports and relaxes the corresponding muscle groups.BRIEF DESCRIPTION OF THE DRAWINGS

[0005] FIG. 1 illustrates the 3D image of the lumbar support cushion herein;

[0006] FIG. 2 illustrates the schematic diagram of the three-dimensional structure of the lumbar support cushion herein (schematic diagram of bionic lumbar support cushion and sciatic bearing area);

[0007] FIG. 3 illustrates the top view of the lumbar support cushion and schematic diagram of the bionic lumbar support cushion structure and coronal plane angle;

[0008] FIG. 4 illustrates the front view of the lumbar support cushion and schematic diagram of the W-shaped sciatic bearing area structure;

[0009] FIG. 5 illustrates the left side view of the lumbar support cushion and schematic diagram of the V-shaped bearing area structure;

[0010] FIG. 6 illustrates the three-dimensional cross-sectional view of lumbar support cushion herein;

[0011] FIG. 7 illustrates the schematic diagram of biomechanical effect of lumbar support cushion and the schematic diagram of physiological curvature from lumbar spine to sacrum.DETAILED DESCRIPTION OF THE EMBODIMENT'S

[0012] Please referring to FIGS. 1-6, the lumbar support cushion is composed of the integrated support frame and the buffer layer; it is divided into the lumbar-sacral support backrest (A1-A4) and the sciatic bearing area (B1-B4) that are linked up and down to form the biomechanical coupling system; the lumbar-sacral support backrest is divided into the central convex curved area A1 (lumbar support area), the sacral support area A2, and lateral wing areas A3 and A4 extending backward on both sides, which together form the backrest with the gradient support structure to support the lumbar spine and sacrum; the sciatic bearing area is divided into the sciatic support center area B1, B2 and the remaining bearing areas B3, B4; the lumbar-sacral support backrest and the sciatic bearing area work together to achieve the functional structure for maintaining pelvic stability and lumbar physiological curvature.

[0013] Please referring to FIG. 7, the maximum convex height point of the said central convex curved surface corresponds to the highest point section of the lumbar physiological curvature lordosis, and the said section covers the physiological curvature adaptation area from the first lumbar vertebra to the fifth lumbar vertebra.

[0014] Please referring to FIG. 3, the said side wing curved surfaces A3 and A4 of the backrest gradually change in curvature toward the rear, and the non-vertical angle of the side wing edges is 5-30°, realizing non-encircling side wings; when the human body performs natural twisting, side bending and other activities, it can provide local lateral support for the waist, and meet the lateral freedom requirements of the human body in natural activity modes; and the two sides are non-encircling, adapting to most waist dimensions.

[0015] Please referring to FIG. 3 and FIG. 7, the sagittal curvature radius of the central convex area A1 adapts to the physiological curvature of the lumbar spine, forming the elliptical-like paraboloid structure; and the lumbar-sacral support backrest forms the nearly vertical angle with the sciatic bearing area, so that the neutral position adapts to the most lumbar curvatures.

[0016] Please referring to FIG. 2, the ischial tuberosity supporting surfaces B1 and B2 are bidirectional diffusion curved surfaces, and their lateral expansion range covers the outer edge of the ischial tuberosity projection area by 10-15 mm.

[0017] Please referring to FIG. 2 and FIG. 7, the lumbar symphysis, that is, the connection area between the fifth lumbar vertebra and the sacrum, has its own peculiarity in statics: the body weight on the fifth lumbar vertebra is decomposed into two forces: one force acts on the base of the sacrum, and the other force has the tendency to slide forward, just like on the slide; if the inclination of the sacral base becomes larger, the lumbar pressure increases; so the structural design of the lumbar backrest area emphasizes the importance of A1 support of the lumbar vertebra and A2 sacral support.

Examples

Embodiment Construction

[0012]Please referring to FIGS. 1-6, the lumbar support cushion is composed of the integrated support frame and the buffer layer; it is divided into the lumbar-sacral support backrest (A1-A4) and the sciatic bearing area (B1-B4) that are linked up and down to form the biomechanical coupling system; the lumbar-sacral support backrest is divided into the central convex curved area A1 (lumbar support area), the sacral support area A2, and lateral wing areas A3 and A4 extending backward on both sides, which together form the backrest with the gradient support structure to support the lumbar spine and sacrum; the sciatic bearing area is divided into the sciatic support center area B1, B2 and the remaining bearing areas B3, B4; the lumbar-sacral support backrest and the sciatic bearing area work together to achieve the functional structure for maintaining pelvic stability and lumbar physiological curvature.

[0013]Please referring to FIG. 7, the maximum convex height point of the said centr...

TECHNICAL FIELD

[0001] This invention herein relates to the technical field of ergonomic protective gear, particularly relates to the lumbar support cushion used to maintain pelvic stability and lumbar spine physiological curvature through the bionic curved surface and biomechanical coupling system; and it is particularly suitable for protecting the lumbar spine and pelvis of people who need to long-time sitting.BACKGROUND OF THE PRESENT INVENTION

[0002] The existing cushions of lumbar support are mostly designed with embracing side wings. Although the lateral support can be supported, the natural movement of the human waist is limited (such as twisting and lateral bending). Long-term use can easily lead to muscle stiffness. In addition, the sciatic bearing area of traditional cushions often adopts the flat or single arc design, 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 lagging, and the embracing side wings force the lumbar spine to be in the non-physiological backward state, which cannot provide effective support; 2. The problem of sacrum suspension: Most traditional cushions do not cover the sacral support area; 3. Insufficient biomechanical coordination: The sciatic bearing area and the lumbar support components operate independently, lacking mechanical coupling, only solving the problem of one single sitting posture, and cannot meet the comprehensive support needs of the human body for the spine and muscles in different sitting postures.SUMMARY OF PRESENT INVENTION

[0003] Technical Solution: The core of the present invention herein is to construct the bionic dynamic coupling system, including the following innovative structures: 1. the central convex curved surface: the composite curvature structure is adopted, the radius of curvature of the coronal plane is consistent with the anatomical direction of the lumbar transverse process anatomy (radius r=50-80 mm, quoted from Gray's Anatomy), the convex height point is located between the second lumbar vertebra and the fourth lumbar vertebra; through bionic modeling optimization, continuous support from the first lumbar vertebra to the fifth lumbar vertebra and sacrum is achieved; and the full-fit support design is adopted for the lumbar sacral area to reduce local pressure concentration; this design is different from most products on the market that have the lumbar spine slightly bent backward and the sacrum suspended without support; it can better support the physiological curvature of the waist; 2. dynamic side wing curvature: the curvature of the side wings decreases gradually from the center to the back of the two sides; the curvature change rate matches the human body's lateral bending / torsion range of motion, ensuring the balance between the support and freedom during lateral motion; different from the embracing cushion designed on the market, this design focuses on strengthening the raised support effect of the middle lumbar sacrum; the two sides can move freely, adapting to most waist dimensions; 3. sciatic bearing area: the bidirectional diffusion surface is expanded horizontally to cover the outer edge of the ischial tuberosity projection area by 10-15 mm (suitable for 90% of hip shapes according to GB / T 10000-2023); the longitudinal extension is nonlinearly related to the sacral length; the arc-shaped wrapping design from the sciatic area to the front and back; the W-shaped in width and V-shaped longitudinal arcs are adapted to most of hip shapes; 4. biomechanical coupling system: the central curved surface and the sciatic curved surface are linked through the mechanical interaction conduction module, automatically adjusting the direction of the support forces when the pelvis tilts forward / backward; the angle between the support force vector and the spine axis is ≤15°, maintaining the safe pressure threshold of the intervertebral disc, which is better than the existing fixed-angle support design and can effectively maintain pelvic stability and lumbar physiological curvature.

[0004] Technical effects: a. dynamic adaptability: it covers 90% of adult body types in GB / T 10000-2023, providing appropriate support for people of different body types; b. multi-degree-of-freedom support: the gradient change rate of the side wing curvature is improved compared to the traditional design, which directly expands the free rotation range of the waist; it supports the waist without restricting the natural movement of the waist, allowing people to twist and bend freely when using the lumbar-support cushion; c. mechanical synergistic optimization: the coupling system reduces the load on the lumbar spine, and reduces the pressure on the spine (including the intervertebral disc) and the back; it also supports and protects the physiological curvature of the waist, and supports and relaxes the corresponding muscle groups.BRIEF DESCRIPTION OF THE DRAWINGS

[0005] FIG. 1 illustrates the 3D image of the lumbar support cushion herein;

[0006] FIG. 2 illustrates the schematic diagram of the three-dimensional structure of the lumbar support cushion herein (schematic diagram of bionic lumbar support cushion and sciatic bearing area);

[0007] FIG. 3 illustrates the top view of the lumbar support cushion and schematic diagram of the bionic lumbar support cushion structure and coronal plane angle;

[0008] FIG. 4 illustrates the front view of the lumbar support cushion and schematic diagram of the W-shaped sciatic bearing area structure;

[0009] FIG. 5 illustrates the left side view of the lumbar support cushion and schematic diagram of the V-shaped bearing area structure;

[0010] FIG. 6 illustrates the three-dimensional cross-sectional view of lumbar support cushion herein;

[0011] FIG. 7 illustrates the schematic diagram of biomechanical effect of lumbar support cushion and the schematic diagram of physiological curvature from lumbar spine to sacrum.DETAILED DESCRIPTION OF THE EMBODIMENT'S

[0012] Please referring to FIGS. 1-6, the lumbar support cushion is composed of the integrated support frame and the buffer layer; it is divided into the lumbar-sacral support backrest (A1-A4) and the sciatic bearing area (B1-B4) that are linked up and down to form the biomechanical coupling system; the lumbar-sacral support backrest is divided into the central convex curved area A1 (lumbar support area), the sacral support area A2, and lateral wing areas A3 and A4 extending backward on both sides, which together form the backrest with the gradient support structure to support the lumbar spine and sacrum; the sciatic bearing area is divided into the sciatic support center area B1, B2 and the remaining bearing areas B3, B4; the lumbar-sacral support backrest and the sciatic bearing area work together to achieve the functional structure for maintaining pelvic stability and lumbar physiological curvature.

[0013] Please referring to FIG. 7, the maximum convex height point of the said central convex curved surface corresponds to the highest point section of the lumbar physiological curvature lordosis, and the said section covers the physiological curvature adaptation area from the first lumbar vertebra to the fifth lumbar vertebra.

[0014] Please referring to FIG. 3, the said side wing curved surfaces A3 and A4 of the backrest gradually change in curvature toward the rear, and the non-vertical angle of the side wing edges is 5-30°, realizing non-encircling side wings; when the human body performs natural twisting, side bending and other activities, it can provide local lateral support for the waist, and meet the lateral freedom requirements of the human body in natural activity modes; and the two sides are non-encircling, adapting to most waist dimensions.

[0015] Please referring to FIG. 3 and FIG. 7, the sagittal curvature radius of the central convex area A1 adapts to the physiological curvature of the lumbar spine, forming the elliptical-like paraboloid structure; and the lumbar-sacral support backrest forms the nearly vertical angle with the sciatic bearing area, so that the neutral position adapts to the most lumbar curvatures.

[0016] Please referring to FIG. 2, the ischial tuberosity supporting surfaces B1 and B2 are bidirectional diffusion curved surfaces, and their lateral expansion range covers the outer edge of the ischial tuberosity projection area by 10-15 mm.

[0017] Please referring to FIG. 2 and FIG. 7, the lumbar symphysis, that is, the connection area between the fifth lumbar vertebra and the sacrum, has its own peculiarity in statics: the body weight on the fifth lumbar vertebra is decomposed into two forces: one force acts on the base of the sacrum, and the other force has the tendency to slide forward, just like on the slide; if the inclination of the sacral base becomes larger, the lumbar pressure increases; so the structural design of the lumbar backrest area emphasizes the importance of A1 support of the lumbar vertebra and A2 sacral support.

Examples

Embodiment Construction

[0012]Please referring to FIGS. 1-6, the lumbar support cushion is composed of the integrated support frame and the buffer layer; it is divided into the lumbar-sacral support backrest (A1-A4) and the sciatic bearing area (B1-B4) that are linked up and down to form the biomechanical coupling system; the lumbar-sacral support backrest is divided into the central convex curved area A1 (lumbar support area), the sacral support area A2, and lateral wing areas A3 and A4 extending backward on both sides, which together form the backrest with the gradient support structure to support the lumbar spine and sacrum; the sciatic bearing area is divided into the sciatic support center area B1, B2 and the remaining bearing areas B3, B4; the lumbar-sacral support backrest and the sciatic bearing area work together to achieve the functional structure for maintaining pelvic stability and lumbar physiological curvature.

[0013]Please referring to FIG. 7, the maximum convex height point of the said centr...

Claims

1. Lumbar support cushion used to maintain pelvic stability and lumbar spine physiological curvature herein, characterized in that it further comprises: (a) bionic lumbar support backrest including the central convex curved surface and non-embracing side wings extending continuously to both sides and backwards; the said central convex curved surface presents the s-shaped continuous curvature change on the sagittal plane to adapt to the physiological curvature of the lumbar spine to the sacrum; the curvature radius direction of the coronal plane is consistent with the anatomical direction of the lumbar transverse process anatomy; the said non-embracing side wings curved surface gradually changes its curvature backwards to form the non-embracing side wings; (b) sciatic bearing area, including the bidirectional diffusion curved surface centered on the ischial tuberosity area; its lateral expansion angle is positively correlated with the distance between the ischial tuberosities.

2. Lumbar support cushion of claim 1, characterized in that it further comprises: the convex height point of the said central convex curved surface is located between the second lumbar vertebra and the fourth lumbar vertebra; the changing direction of the sagittal plane curvature radius is adapted to the physiological curvature axis of the spine.

3. Lumbar support cushion of claim 1, characterized in that it further comprises: the said non-embracing side wings curved surface of the backrest gradually changes its curvature backward; the non-vertical angle of the free edge of the side wing is 5-30.

4. Lumbar support cushion of claim 1, characterized in that it further comprises: the bidirectional diffusion surface of the said sciatic bearing area forms the w-shaped arc in the coronal plane and the v-shaped arc in the sagittal plane; the lateral expansion range covers 10-15 mm of the outer edge of the ischial tuberosity projection area; it is suitable for more than 90% of hip shapes.

5. Lumbar support cushion of claim 1, characterized in that it further comprises: the said bionic lumbar support backrest cooperates with the said sciatic bearing area to control the dynamic change of the lumbar lordosis angle in the pelvic forward tilt / backward tilt state.

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