A chair with elastic space
By combining the curved seat cushion crossbar with the seat cushion board, an elastic deformation space is formed, which solves the problem of insufficient comfort of existing chair seat cushions, achieves a fit with the human body curve and a cushioning effect, and simplifies the structural design.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- XIAMEN ZHENXINGHE EXPERIENCE TECHNOLOGY CO LTD
- Filing Date
- 2025-06-23
- Publication Date
- 2026-07-14
AI Technical Summary
Existing chair cushions lack sufficient support and comfort, have complex structures and limited deformation, and cannot adapt to the dynamic changes in human sitting posture.
The curved seat cushion crossbar is combined with the seat cushion plate to form an elastic deformation space. The space gap between the curved seat cushion crossbar and the seat cushion plate provides elastic support and simplifies the structural design.
It improves sitting comfort, reduces costs and assembly difficulty, and achieves a fit and cushioning effect against the curves of the human body.
Smart Images
Figure CN224483429U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of furniture technology, specifically relating to a chair with elastic space that conforms to the human body curve and reduces fatigue. Background Technology
[0002] The existing chair seat support has the following defects:
[0003] 1. Insufficient comfort: Traditional seat cushions are in direct contact with rigid supports (such as straight crossbars), and there is no cushioning space when force is applied, which can easily cause a feeling of pressure.
[0004] 2. Complex structure: Some elastic seat cushions rely on auxiliary structures such as springs and foam, which increases cost and assembly difficulty;
[0005] 3. Limited Deformation: The direct connection between the rigid support and the seat cushion restricts the natural deformation of the seat cushion, making it unable to adapt to the dynamic changes in human sitting posture.
[0006] Therefore, there is an urgent need for a chair with a simple structure that combines support and a certain degree of flexibility.
[0007] With this agreement in place, this case arose. Summary of the Invention
[0008] The purpose of this utility model is to address the shortcomings of existing technologies by providing a chair with a reasonable structural design, improved sitting comfort, and simplified assembly.
[0009] This utility model is achieved through the following technical solution: a chair with elastic space, which is composed of a backrest frame and a seat cushion frame; the backrest frame and the seat cushion frame are fastened together by screws, and an arc-shaped seat cushion crossbar is arranged horizontally on the seat cushion frame.
[0010] The curved seat cushion crossbar is arched downwards and is installed in the middle of the seat cushion frame to provide basic support for the seat cushion.
[0011] The backrest frame is fitted with a backrest panel, which is arc-shaped and forms a stable structure that is narrow at the top and wide at the bottom. The front surface of the backrest panel is provided with two symmetrical semi-arc shapes.
[0012] The seat frame is provided with a seat board, which is S-shaped. The front surface of the seat board is not flat, but has a three-dimensional groove designed according to the natural shape of the human buttocks to form a buttocks recess structure for wrapping the buttocks.
[0013] The back edge of the seat cushion has a slot that directly engages with the crossbar of the seat cushion frame and is further secured with screws.
[0014] The seat cushion frame is constructed from an elliptical tube.
[0015] The beneficial effects of this utility model are as follows: Compared with the prior art, this utility model, by setting an arc-shaped crossbar on the seat cushion frame laterally, and using the seat cushion plate to match the arc-shaped crossbar, a certain space gap is formed between the seat cushion plate and the arc-shaped crossbar. The gap allows the seat cushion plate to deform naturally with the pressure of the human body, conform to the curve of the buttocks, distribute pressure, and reduce fatigue; by simply matching the arc-shaped crossbar with the seat cushion plate, no additional elastic parts are needed, which reduces costs and assembly difficulty. Attached Figure Description
[0016] The present invention will now be described in detail with reference to the accompanying drawings.
[0017] Figure 1 This is a schematic diagram of the present invention.
[0018] Figure 2 This is a reverse view of the seat cushion in this utility model.
[0019] The following are the specific names of the symbols in the diagram: 1. Backrest panel; 2. Backrest frame; 3. Curved seat cushion crossbar; 4. Seat cushion frame; 5. Seat cushion board; 6. Clamping block. Detailed Implementation
[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.
[0021] The space between the arc-shaped seat cushion and the seat plate in this invention provides space for the seat plate to deform elastically. When subjected to force, it is slightly pressed downwards and rebounds after the force is released.
[0022] like Figure 1 As shown, a chair with flexible space consists of a backrest frame 2 and a seat cushion frame 4. The backrest frame 2 and the seat cushion frame 4 are fastened together with screws. An arc-shaped seat cushion crossbar 3 is horizontally arranged on the seat cushion frame 4. The backrest frame 2 and the seat cushion frame 4 are made of metal. The seat cushion frame 4 is composed of two side support legs that are supported on the ground. The backrest frame 2 is fixed to the two side support legs. The arc-shaped seat cushion crossbar 3 and other crossbars are also installed between the two side support legs to provide basic support for the seat cushion.
[0023] In order to increase the firmness of the connection between the backrest frame 2 and the two side support legs, a clamping block 6 is also provided between the connection between the backrest frame 2 and the two side support legs. That is, the backrest frame 2 is fixed on the clamping block 6, and the tubes of the two side support legs are also fixed on the clamping block 6. Therefore, after this fixation, it is not easy to slip and the connection is more secure.
[0024] The curved seat cushion crossbar 3 is an arc shape that arches downwards. The curved seat cushion crossbar 3 is made of Φ18~25mm stainless steel pipe, which is bent into an arc shape with a radius of 80~150mm by a CNC pipe bending machine (to adapt to the human sitting posture curve). The two ends of the curved seat cushion crossbar 3 are connected to the two side support feet by screws.
[0025] The two side frame support feet are composed of elliptical tubes.
[0026] The backrest frame 2 is fitted with a backrest board 1, which has a certain arc shape to adapt to the curve of the human body. At the position corresponding to the spine, the backrest forms a clear, slightly concave longitudinal groove, providing a pressure-free passage for the spine. On both sides of the spinal groove, especially in the area corresponding to the waist, the backrest protrudes significantly outward, forming a strong support surface. The backrest board as a whole presents a stable structure that is narrower at the top and wider at the bottom. Its protruding lumbar support area visually resembles two symmetrical semi-peach arcs, combining below the spinal groove to form a complete, full heart-shaped or butterfly-wing-shaped lumbar support surface. This double semi-peach arc design perfectly matches the physiological curve of the human lower back; the protruding part firmly supports the lumbar muscles, helping to maintain a natural and healthy lumbar curvature and effectively relieving lower back fatigue; the narrower-than-wide shape provides a more fitting and stable support.
[0027] like Figure 2 As shown, a seat cushion board 5 is provided on the seat cushion frame 4. The reverse edge of the seat cushion board 5 has a groove that directly engages with the crossbar of the seat cushion frame. The seat cushion board 5 is S-shaped, and its surface is not flat but precisely shaped into a three-dimensional groove according to the natural shape of the human buttocks, resembling a slightly sunken buttocks dimple that gently wraps and gathers the user's buttocks. This concave-convex curved surface closely conforms to the curve of the buttocks, maximizing the contact area. When a person sits down, the pressure is evenly distributed across the entire contact surface, effectively avoiding numbness and pain caused by localized pressure. Simultaneously, the natural gaps formed by the curved surface promote air circulation, accelerate heat dissipation, and keep the buttocks dry and comfortable.
[0028] The seat cushion 5 is made of ABS plastic board (8-12mm thick) or solid wood laminate, with slots machined by CNC or molded from plastic in one piece. These slots directly engage with the curved seat crossbar 3 and other crossbars. The surface of the seat cushion 5 is sanded and textured with anti-slip patterns (such as frosted or striped) to enhance the tactile feel. Once the S-shaped seat cushion 5 is fixed, a certain gap is formed between it and the curved seat crossbar 3. Therefore, the seat cushion has a certain elasticity under pressure, increasing sitting comfort, much like a slightly drooping, elastic hammock. When the buttocks press down, the seat cushion 5 and the curved seat crossbar 3 naturally and evenly deform downwards within the elastic range supported by the elliptical tube, providing gradual cushioning. This ensures that the user sinks into the seat gently and with a cushioned feeling, rather than slamming hard onto the chair, effectively preventing a hard landing.
[0029] The assembly method of this utility model is as follows: the arc-shaped seat cushion crossbar 3 is welded or screwed to the preset position on the support feet of the two side frames to ensure levelness, and the other basic support crossbars are also installed in the same way; then the backrest plate 1 is put on the backrest frame 2 and fixed; finally, the seat cushion plate is snapped into the slot on the arc-shaped seat cushion crossbar 3 and the other crossbars. At this time, a space gap is formed between the arc-shaped seat cushion crossbar 3 and the seat cushion plate 5, realizing the combination of rigid support and cushioning deformation, effectively solving the problem of insufficient comfort of traditional chair seat cushions. The structure is extremely simple and the cost is controllable.
Claims
1. A chair with flexible space, comprising a backrest frame and a seat cushion frame; the backrest frame and the seat cushion frame are fastened together by screws, characterized in that, The seat frame has a horizontally curved seat crossbar. The curved seat cushion crossbar is arched downwards and is installed in the middle of the seat cushion frame to provide basic support for the seat cushion. The seat cushion is S-shaped, and its front surface is not flat. It has a three-dimensional groove designed according to the natural shape of the human buttocks, forming a buttocks recess structure to wrap around the buttocks.
2. A chair with a flexible space according to claim 1, characterized in that, A backrest panel is fitted onto the backrest frame. The backrest panel is arc-shaped and forms a stable structure that is narrow at the top and wide at the bottom. Two symmetrical semi-arc shapes are set on the front surface of the backrest panel.
3. A chair with a flexible space according to claim 1, characterized in that, The seat frame has a seat plate, and the reverse edge of the seat plate has a slot that directly engages with the crossbar of the seat frame.
4. A chair with a flexible space according to claim 1, characterized in that, The seat cushion frame is constructed from oval tubes.