Cushion capable of relieving lumbar muscle strain

Abstract

The utility model discloses a cushion for relieving lumbar muscle strain, which comprises a cushion body and an outer sleeve at least wrapping the side face of the cushion body, at least the side face part of the outer sleeve has elasticity, the cushion body comprises a bottom plate, a movable supporting piece is movably connected above the bottom plate, a seat plate is fixedly connected above the movable supporting piece, and the seat plate is fixedly connected above the movable supporting piece. An arc-shaped swing face is arranged at the lower end of the movable supporting piece, and the swing face abuts against the bottom plate in a swing mode. The utility model has the advantages that the structure is simple, and the waist strain can be effectively reduced.

Description

Technical Field

[0001] This utility model relates to the field of seat cushion technology, and in particular to a seat cushion that can reduce lumbar muscle strain. Background Technology

[0002] With changes in modern lifestyles and work habits, it's increasingly common for people to maintain a seated posture for extended periods, especially while working, studying, driving, or engaging in recreational activities. Maintaining a fixed sitting posture for long periods puts continuous pressure and strain on the spine, particularly the lumbar vertebrae and surrounding muscles and ligaments. This is because, under prolonged fixed postures, the muscles in the lumbar and pelvic regions experience a monotonous and unchanging stress pattern, leading to poor local blood circulation. The muscles remain in a state of tension, easily causing fatigue, stiffness, and even chronic inflammation. Over time, this can result in health problems such as lumbar muscle strain and herniated discs.

[0003] Existing seating, such as standard office chairs or armchairs, typically provides static support. Even chairs claiming ergonomic design or those with added lumbar support often offer fixed support. Users sitting in these chairs tend to maintain a relatively static posture for extended periods, which doesn't effectively change the stress on the lumbar muscles or promote microcirculation and dynamic adjustment in the lumbar region. Some people try to alleviate discomfort by frequently changing their posture, but this usually requires voluntary action and has limited effectiveness.

[0004] Therefore, it is necessary to further improve and perfect the existing technology to overcome these shortcomings, and this utility model is made based on this situation. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a seat cushion with a simple structure that can effectively reduce lumbar strain.

[0006] This utility model is achieved through the following technical solution:

[0007] To solve the above-mentioned technical problems, this utility model provides a seat cushion for relieving lumbar muscle strain, including a seat cushion body and an outer cover covering at least its sides. The outer cover has elasticity at least on its sides. The seat cushion body includes a base plate, a movable support member is movably connected above the base plate, and a seat plate is fixedly connected above the movable support member. The lower end of the movable support member is provided with an arc-shaped swing surface, and the swing surface can swing against the base plate.

[0008] In order to further solve the technical problem to be solved by this utility model, this utility model provides a seat cushion for relieving lumbar muscle strain, wherein the top surface of the base plate is provided with an arc-shaped groove, and the swing surface is placed in the arc-shaped groove and can swing therein.

[0009] In order to further solve the technical problem to be solved by this utility model, the present utility model provides a cushion for relieving lumbar muscle strain, wherein the surface of the arc-shaped groove is provided with a wear-resistant layer.

[0010] To further address the technical problem to be solved by this utility model, this utility model provides a seat cushion for relieving lumbar muscle strain, wherein the swing surface is a convex arc surface, the arc groove is a concave arc groove, and the radius of curvature of the arc groove is greater than the radius of curvature of the swing surface.

[0011] In order to further solve the technical problem to be solved by this utility model, the movable support member in the seat cushion for relieving lumbar muscle strain provided by this utility model has a hollow structure.

[0012] In order to further solve the technical problem to be solved by this utility model, the present utility model provides a seat cushion for relieving lumbar muscle strain, wherein the seat board includes a hard base and a flexible soft pad.

[0013] In order to further solve the technical problem to be solved by this utility model, the present utility model provides a seat cushion for relieving lumbar muscle strain, wherein the top surface of the seat plate is provided with a seat groove for supporting the human body.

[0014] In order to further solve the technical problem to be solved by this utility model, the present utility model provides a seat cushion for relieving lumbar muscle strain, wherein the top surface of the seat plate is provided with several flexible protrusions.

[0015] In order to further solve the technical problem to be solved by this utility model, the bottom plate of the seat cushion provided by this utility model for relieving lumbar muscle strain is made of rigid material.

[0016] In order to further solve the technical problem to be solved by this utility model, the movable support member of the cushion for relieving lumbar muscle strain provided by this utility model is made of rigid material or elastic material.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] This invention provides a seat cushion for reducing lumbar muscle strain. The cushion body incorporates a swingable structure consisting of a base plate, a movable support member, and a seat plate. The swingable contact between the arc-shaped swing surface at the lower end of the movable support member and the base plate (preferably with an arc-shaped groove on the base plate) allows the seat plate to dynamically tilt or swing within a defined range. Furthermore, an elastic outer cover (at least on the sides) provides a restoring force when the cushion body swings, thus forming a controlled, dynamic support mechanism with a reset function. Unlike existing static support seat cushions, this invention, by introducing this moderate, non-completely unstable dynamic, effectively encourages the user to naturally engage and coordinate the abdominal and lumbar muscles while seated, dispersing the long-term fixed force on the lower back, promoting local blood circulation, and significantly reducing lumbar strain caused by prolonged fixed sitting postures. Meanwhile, this utility model also has the advantages of relatively simple structure, small size, convenient use (can be placed directly on various existing chairs), significant effect, and can further improve durability, lightness, comfort and functionality through detailed design (such as wear-resistant layer, hollow structure, flexible seat plate, seat groove, flexible protrusion, etc.). Attached Figure Description

[0019] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, wherein:

[0020] Figure 1 This is an exploded view of the present invention;

[0021] Figure 2 This is a cross-sectional view of the present invention. Detailed Implementation

[0022] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] Reference Figure 1 and Figure 2 This utility model provides a seat cushion that can alleviate lumbar muscle strain. Its main structure includes a seat cushion body 1 and an outer cover 2 that wraps around the seat cushion body 1.

[0024] The outer cover 2 at least covers the sides of the seat cushion body 1, and the outer cover 2 at least has elasticity on the sides. The elastic design of the outer cover 2 helps it to wrap tightly around the seat cushion body 1, maintaining the overall compactness and neat appearance; on the other hand, and more importantly, this elasticity allows the seat cushion body 1 to have a certain amount of room to move on the base plate 11, and provides important return capability.

[0025] Specifically, when a user sits on the seat 13 and the movable support 12 and seat 13 swing relative to the base plate 11 due to adjustments in body posture or shifts in center of gravity, the elastic portion of the outer cover 2 covering the side of the seat cushion body 1 deforms accordingly. For example, on the side where the swing is tilted, the side material of the outer cover 2 will be stretched; while on the other side, it may be compressed or relaxed. This stretching and compression of the elastic material generates a restoring force, the direction of which always tends to pull the movable support 12 and seat 13 back to their center or vertical position relative to the base plate 11. In other words, the elastic side of the outer cover 2 provides a restoring torque, giving the seat cushion body 1 a tendency to automatically or assist the user in returning to a balanced position after the swing.

[0026] The restorative ability provided by the elasticity of the outer jacket 2, combined with the swaying motion generated by the lower end swing surface 121 of the movable support 12 on the base plate 11 (especially when it mates with the arc-shaped groove 111), constitutes the dynamic support mechanism of the seat cushion of this invention. Unlike structures that swing freely, it is not prone to instability. Instead, it provides moderate swaying to activate the abdominal and lumbar muscles while offering a gentle centering tendency, helping users find and maintain a dynamically balanced sitting posture more easily. This controlled, restorative dynamic support is key to reducing lumbar muscle strain caused by prolonged fixed sitting postures.

[0027] In a preferred embodiment, the outer cover 2 can be made of a fabric with good elasticity and abrasion resistance, such as a polyester / spandex blend or elastic synthetic leather. The outer cover 2 can be fixed to the seat cushion body 1 by sewing, zippers, elastic bands, or elastic wrapping, allowing for easy removal and washing. The elasticity, thickness, and fit of the outer cover 2 to the side of the seat cushion body can be designed and adjusted according to the desired swing amplitude and return force.

[0028] The seat cushion body 1 is the core structure of this utility model, which includes a base plate 11, a movable support member 12, and a seat plate 13.

[0029] The base plate 11 is used to abut against the surface of a chair or seat on which the cushion is placed. To provide a stable and flat contact surface, the base plate 11 is preferably made of a rigid material, such as, but not limited to, wood, engineering plastic sheets (such as PP, PE, ABS), or metal sheets. The shape of the base plate 11 can be square, round, oval, or other shapes suitable for fitting with the seat, and its dimensions can be designed according to the dimensions of commonly used seats.

[0030] The movable support member 12, located above the base plate 11, is a key component for achieving dynamic support of the seat cushion. The movable support member 12 establishes a swingable contact with the base plate 11 via an arc-shaped swing surface 121 at its lower end. When a user sits on the seat cushion, the movable support member 12 can swing within a limited range on the base plate 11, using the swing surface 121 as a fulcrum or contact area. The material of the movable support member 12 can be a rigid material (such as hard plastic or metal) or a material with a certain degree of elasticity (such as high-density foam, rubber, or materials with built-in elastic structures), depending on the desired swing characteristics and support feel. Rigid materials may provide a more direct swing response, while elastic materials may provide a softer or slightly damped swing feel.

[0031] The seat 13 is fixedly connected above the movable support 12 to directly support the user's body weight. Furthermore, the seat 13 includes a rigid base 13b and a flexible cushion 13a. The base 13b is preferably made of materials such as plastic, wood, or solidified gelatin to provide better support for the upper torso. The cushion 13a is preferably made of materials such as high-density sponge, latex, memory foam, or gel to provide a comfortable sitting experience and distribute pressure. The design of the rigid base 13b in the seat 13 provides better and more stable support for the user's upper body.

[0032] Of course, the cushion 13a is preferably designed to be integrated with the top surface of the outer cover 2.

[0033] Through the contact structure between the swing surface 121 at the lower end of the movable support 12 and the base plate 11, the cushion of this invention forms a defined unstable structure. When a user sits on the cushion, due to slight changes in the center of gravity or posture, the cushion will sway slightly on the base plate 11. This swaying is not complete instability, but rather a dynamic adjustment within a certain range. To adapt to the force brought about by this moderate instability, the user will instinctively engage and adjust the muscles in the waist, abdomen, and core area to maintain body balance and stability. This continuous, slight muscle activity can promote blood circulation in the waist, distribute the force points of the muscles, and prevent specific muscle groups from being in a state of static tension or overwork for a long time, thereby achieving the effect of reducing waist strain. Compared with a completely static sitting posture, this dynamic support helps to improve sitting habits and enhance the vitality of the core muscles.

[0034] To optimize the swing function and provide better stability guidance, in a preferred embodiment, the top surface of the base plate 11 is provided with an arc-shaped groove 111. The swing surface 121 of the movable support 12 is accommodated within this arc-shaped groove 111 and swings therein. This arc-shaped groove 111 provides a defined motion trajectory for the swing surface 121, helping to control the direction and amplitude of the swing and preventing excessive tilting. (Refer to...) Figure 1-2The swing surface 121 is usually a convex arc surface, while the arc groove 111 is a concave arc groove that matches it.

[0035] Furthermore, to ensure durability and smooth oscillation during long-term use, the surface of the arc-shaped groove 111 may be provided with a wear-resistant layer 3. This wear-resistant layer 3 may be made of a wear-resistant coating, a patch (such as a metal sheet), or a material with high wear resistance (such as polyurethane, Teflon coating, etc.) to reduce friction and wear between the oscillating surface 121 and the groove 111.

[0036] In a particularly preferred embodiment, the radius of curvature of the convex arc surface of the swing surface 121 is smaller than the radius of curvature of the concave arc groove of the arc groove 111. This design results in a relatively loose fit between the swing surface 121 and the arc groove 111, rather than a complete fit. When the cushion tilts, the contact point between the swing surface 121 and the groove 111 shifts, creating a motion mechanism similar to a "rocker" or "rocking chair." This curvature difference design helps provide a smoother swing experience and can achieve a certain degree of "automatic return to center," meaning that when the user's body posture tends to be upright, the cushion will naturally return to the center position. Furthermore, the length or depth of the arc groove 111 can further limit the maximum swing angle of the swing surface 121, thereby controlling the degree of dynamic instability of the cushion and keeping it within a comfortable and effective range.

[0037] To reduce overall weight and make the cushion easier to carry and place on various chairs, in a preferred embodiment, the movable support 12 is designed as a hollow structure. The hollow structure ensures sufficient support strength while effectively saving materials and reducing manufacturing costs.

[0038] In order to improve the user experience, the top surface of the seat 13 may be provided with some additional features. For example, in one embodiment, the top surface of the seat 13 is provided with a seat groove 131 for supporting the human body. The seat groove 131 can be designed according to the ergonomic curve to better fit the curves of the buttocks and thighs, provide additional support and positioning, and increase the stability and comfort of sitting.

[0039] In another embodiment, the top surface of the seat plate 13 may be provided with a plurality of flexible protrusions 132. These protrusions 132 can provide greater friction and cushioning when the user is seated. This increased friction allows the user to obtain better grip and control when making dynamic adjustments to the seat or slight changes in posture using the seat cushion. When the movable support 12 and the seat plate 13 swing, or when the user actively makes minor adjustments to their waist to adapt to the dynamics of the seat cushion, the local resistance provided by the protrusions 132 helps stabilize these minor movements and prevents unnecessary sliding or shifting of the body on the seat plate. This allows the user to control their center of gravity and waist muscle activity more precisely and stably, thereby responding more effectively to the dynamic feedback of the seat cushion and further enhancing the effect of relieving lumbar strain by mobilizing the abdominal and lumbar muscle groups. In short, these flexible protrusions 132 enhance the anti-slip function and provide the user with a safer and more controllable support platform during dynamic use. At the same time, the gaps between the protrusions can form ventilation channels, increasing breathability and preventing stuffiness during long-term sitting. The raised areas are preferably made of a material integrally molded with the seat material or a soft, elastic material to ensure comfort. The shape, size, and distribution of the raised areas can be adjusted as needed, such as in the form of rings, waves, strips, or dots. These raised areas also provide a certain degree of anti-slip function to prevent the user from sliding on the seat cushion.

[0040] The cushion of this invention is small in size and has a relatively simple structure. It can be easily placed on various existing ordinary chairs, office chairs, car seats, or even the ground for direct use without modifying existing seats. It has good versatility and portability.

[0041] It should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Within the scope of the concept of the present invention, those skilled in the art can make various modifications or variations, such as the internal structure of the movable support, the specific arc shape and size of the swing surface and groove, the details of the connection method of each component, the specific elastic material and fixing method of the outer sleeve, the thickness of the seat plate and the filling material, etc., and these modifications or variations should all be considered to fall within the scope of protection of the present invention.

Claims

1. A seat cushion for reducing strain on the lumbar muscles, characterized by: The cushion includes a seat body (1) and an outer cover (2) that covers at least its sides. The outer cover (2) is elastic at least on its sides. The seat body (1) includes a base plate (11). A movable support member (12) is movably connected above the base plate (11). A seat plate (13) is fixedly connected above the movable support member (12). The lower end of the movable support member (12) is provided with an arc-shaped swing surface (121). The swing surface (121) can swing against the base plate (11).

2. The cushion of claim 1, wherein: The top surface of the base plate (11) is provided with an arc-shaped groove (111), and the swing surface (121) is accommodated in the arc-shaped groove (111) and can swing therein.

3. The cushion of claim 2, wherein: The surface of the arc-shaped groove (111) is provided with a wear-resistant layer (3).

4. The cushion of claim 2, wherein: The swing surface (121) is a convex arc surface, the arc groove (111) is a concave arc groove, and the radius of curvature of the arc groove (111) is greater than the radius of curvature of the swing surface (121).

5. The cushion of claim 1, wherein: The movable support (12) is a hollow structure.

6. The cushion of claim 1, wherein: The seat plate (13) includes a rigid base (13b) and a flexible cushion (13a).

7. The cushion of claim 1, wherein: The top surface of the seat plate (13) is provided with a seat groove (131) for supporting the human body.

8. The cushion of claim 1, wherein: The top surface of the seat plate (13) is provided with several flexible protrusions (132).

9. The cushion of claim 1, wherein: The base plate (11) is made of a rigid material.

10. The cushion of claim 1, wherein: The movable support (12) is made of rigid or elastic material.

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