An integrated plastic chair
Patent Information
- Application Number
- CN202522372200.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-08
- Publication Date
- 2026-10-09
- Estimated Expiration
- 2035-11-08
AI Technical Summary
[0003]本申请的目的是提供一种一体式塑料椅，避免现有平面座面导致的局部压迫及血液循环不畅问题，解决了现有椅背支撑不足的缺陷，且增强连接部的结构强度
1.该一种一体式塑料椅，通过椅座和椅背的弧形结构，提升人体适配性与舒适性，椅座的上表面呈适配人体臀部曲线的弧形结构，使用时能贴合臀部自然形态，分散臀部压力，避免现有平面座面导致的局部压迫及血液循环不畅问题；椅背的前侧面呈适配人体背部曲线的弧形结构，可贴合背部生理曲度，为背部提供均匀支撑，减少长时间就座的背部肌肉疲劳，解决了现有椅背支撑不足的缺陷；通过强化固定结构，增强椅座与椅腿连接部的稳定性，椅座与椅腿的连接处设有多个沿周向分布的凸起筋条，筋条一端连接椅座、另一端连接椅腿，可分散该应力集中区域的载荷，增强连接部的结构强度；配合凸起筋条截面呈弧形且厚度从两端向中间逐渐增加的设计，弧形截面能进一步分散应力，厚度渐变则提升了筋条的承重能力，有效减少椅子在承载或挪动时的变形，解决了现有结构易变形、易倾倒的问题。
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Figure CN224820083U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of furniture manufacturing technology, and in particular to a one-piece plastic chair. Background Technology
[0002] In existing technologies, one-piece plastic chairs are typically manufactured using a one-piece plastic molding process. Their structure generally includes a seat, legs, and backrest, and they are widely used in everyday situations due to their low cost and light weight. However, existing one-piece plastic chairs have significant drawbacks: insufficient ergonomic design; the seats are mostly flat structures that cannot conform to the natural curve of the buttocks, easily leading to poor blood circulation in the buttocks after prolonged use; the height and tilt angle of the backrest are fixed and unreasonable, failing to provide effective support for the back and easily causing back muscle fatigue. Simultaneously, structural stability is poor; the connection between the seat and legs is a stress concentration area, and existing structures lack reinforcement in this area. Under load or frequent movement, the inherent properties of the plastic material can easily cause deformation, even leading to the chair tipping over, posing a safety hazard. Therefore, this paper proposes a one-piece plastic chair. Utility Model Content
[0003] The purpose of this application is to provide a one-piece plastic chair that avoids the problems of local pressure and poor blood circulation caused by existing flat seat surfaces, solves the defects of insufficient back support in existing chairs, and enhances the structural strength of the connecting parts.
[0004] The one-piece plastic chair provided in this application adopts the following technical solution: it includes a one-piece molded seat, chair legs and backrest. The upper surface of the seat has an arc-shaped structure that conforms to the curve of the human hip. The front side of the backrest has an arc-shaped structure that conforms to the curve of the human back. The connection between the seat and the chair legs is provided with a reinforcing and fixing structure. Multiple reinforcing and fixing structures are provided. The multiple reinforcing and fixing structures are raised ribs distributed circumferentially along the connection between the seat and the chair legs. One end of the raised rib is connected to the seat and the other end is connected to the chair leg. By adopting the above technical solutions, the curved structure of the seat and backrest enhances human adaptability and comfort. The upper surface of the seat is curved to conform to the curve of the human buttocks, allowing it to fit the natural shape of the buttocks during use, distributing pressure and avoiding the localized pressure and poor blood circulation problems caused by existing flat seat surfaces. The front side of the backrest is curved to conform to the curve of the human back, conforming to the physiological curvature of the back and providing even support, reducing back muscle fatigue from prolonged sitting and solving the problem of insufficient support in existing backrests. By strengthening the fixing structure, the stability of the connection between the seat and the legs is enhanced. Multiple circumferentially distributed raised ribs are provided at the connection between the seat and the legs, with one end of the ribs connecting to the seat and the other end connecting to the legs, which can distribute the load in the stress concentration area and enhance the structural strength of the connection.
[0005] Preferably, the top height of the chair back is adapted to the position of the human shoulder blade, and a preset tilt angle is formed between the chair back and the seat.
[0006] By adopting the above technical solutions, the height of the top of the chair back is adapted to the position of the human shoulder blade, which can provide targeted support to the shoulder blade area and prevent the back from being unsupported; the preset tilt angle between the chair back and the seat conforms to the natural sitting posture of the human body, reduces back muscle tension, further optimizes the back support effect, and relieves the fatigue of sitting for a long time.
[0007] Preferably, the upper section of the chair leg is inclined away from the center of the seat, and the bottom of the chair leg is provided with an anti-slip part.
[0008] By adopting the above technical solution, the upper part of the chair legs is tilted away from the center of the seat, which expands the support span and reduces the risk of the chair tipping over; the anti-slip part at the bottom of the chair legs can enhance the friction with the ground and prevent slipping during use, thus doubly improving the overall placement stability and solving the safety hazards of existing plastic chairs being easy to slide and tip over.
[0009] Preferably, the edge of the seat is provided with an upwardly curved guard edge, which smoothly transitions with the upper surface of the seat.
[0010] By adopting the above technical solution, the upward-curving edge of the seat can slightly limit the buttocks and prevent the body from sliding; the smooth transition design between the edge and the upper surface of the seat prevents the edge from hurting the human body and improves the comfort of use.
[0011] Preferably, the anti-slip part is an anti-slip pad extending outward from the bottom of the chair leg, and the lower surface of the anti-slip pad is provided with anti-slip texture.
[0012] By adopting the above technical solution, the anti-slip part is an outward-extending anti-slip pad, which increases the contact area with the ground; the anti-slip texture on the lower surface of the anti-slip pad further enhances the friction, significantly improves the anti-slip effect, and ensures that the chair can be placed stably on a smooth surface.
[0013] Preferably, the cross-section of the raised rib at the connection between the seat and the leg is arc-shaped, and the thickness of the raised rib gradually increases from both ends to the middle.
[0014] By adopting the above technical solutions, the arc-shaped cross-section of the raised ribs can distribute stress more evenly and reduce local stress concentration; the thickness of the ribs gradually increases from both ends to the middle, which can enhance the load-bearing capacity of the ribs themselves and further improve the structural strength and durability of the connection between the seat and the legs.
[0015] Preferably, the end of the retaining edge is provided with a rounded corner, and the radius of the rounded corner is adapted to the thickness of the retaining edge.
[0016] By adopting the above technical solutions, the rounded corner design at the end of the guard edge can prevent sharp edges from hitting the human body and improve safety; the radius of the rounded corner is matched with the thickness of the guard edge, ensuring structural rationality while further optimizing contact comfort.
[0017] Preferably, the connection between the chair back and the seat is provided with a transition rounded corner, which makes the bottom of the chair back and the rear edge of the seat smoothly connected.
[0018] By adopting the above technical solution, the rounded corners at the connection between the chair back and the seat make the connection between the two smooth, reducing the local pressure on the connection between the back and buttocks; at the same time, the rounded corner structure can disperse the stress in this area, enhance the fracture resistance of the connection between the chair back and the seat, and improve the overall structural durability.
[0019] In summary, this application includes at least one of the following beneficial technical effects: 1. This integrated plastic chair enhances ergonomics and comfort through the curved structure of the seat and backrest. The upper surface of the seat is curved to conform to the curve of the human hip, allowing it to fit the natural shape of the buttocks during use, distributing pressure and avoiding the localized pressure and poor blood circulation problems caused by existing flat seat surfaces. The front side of the backrest is curved to conform to the curve of the human back, conforming to the physiological curvature of the back and providing even support, reducing back muscle fatigue during prolonged sitting and solving the problem of insufficient support in existing backrests. By strengthening the fixed structure, the stability of the connection between the seat and the legs is enhanced. Multiple circumferentially distributed raised ribs are provided at the connection between the seat and the legs, with one end of the ribs connecting to the seat and the other end connecting to the legs, which can distribute the load in the stress concentration area and enhance the structural strength of the connection. Combined with the design of the curved cross-section of the raised ribs and the gradual increase in thickness from both ends to the middle, the curved cross-section can further distribute stress, and the gradual change in thickness can improve the load-bearing capacity of the ribs, effectively reducing the deformation of the chair when carrying loads or moving it, solving the problems of easy deformation and tipping of existing structures.
[0020] 2. This one-piece plastic chair optimizes back support through its backrest height and angle design. The top of the backrest is height-adapted to the position of the human shoulder blades and forms a preset tilt angle with the seat. During use, the top of the backrest provides targeted support to the shoulder blade area. The tilt angle conforms to the natural posture of the back when seated, avoiding the problems of unsupported back or excessive forward tilt caused by unreasonable backrest height or angle in existing chairs, further reducing back muscle fatigue. The upper section of the chair legs is tilted away from the center of the seat, which expands the support span of the chair legs and enhances the chair's anti-tipping ability. Combined with the anti-slip parts at the bottom of the chair legs, especially when the anti-slip parts are outward-extending anti-slip pads with anti-slip texture, the anti-slip pads increase the contact area with the ground, and the anti-slip texture enhances friction, effectively preventing the chair from sliding during use and solving the safety hazards of insufficient stability in existing plastic chairs. Attached Figure Description
[0021] Figure 1 This is a schematic diagram of the structure as seen from the front in this application; Figure 2 This is a structural schematic diagram of the rear view of this application; Figure 3 This is a side view of the structure of this application; Figure 4 This is a top view structural diagram of this application; Figure 5 This is a structural diagram of this application viewed from below.
[0022] In the picture: 1. Seat; 2. Legs; 3. Backrest; 4. Reinforced fixing structure; 5. Anti-slip part; 6. Edge guard. Detailed Implementation
[0023] The following is in conjunction with the appendix Figure 1 - Appendix Figure 5 This application will be described in further detail below.
[0024] Example 1: A one-piece plastic chair, as shown in the figure. Figure 1 , Figure 2 and Figure 3The chair includes a one-piece molded seat 1, legs 2, and backrest 3. The upper surface of the seat 1 has an arc-shaped structure that conforms to the curve of the human hip. The front side of the backrest 3 has an arc-shaped structure that conforms to the curve of the human back. A reinforcing fixing structure 4 is provided at the connection between the seat 1 and the legs 2. Multiple reinforcing fixing structures 4 are raised ribs distributed circumferentially along the connection between the seat 1 and the legs 2, with one end of each rib connected to the seat 1 and the other end connected to the legs 2. The arc-shaped structure of the seat 1 and backrest 3 enhances ergonomic fit and comfort. The upper surface of the seat 1 has an arc-shaped structure that conforms to the curve of the human hip, allowing for a snug fit during use. The natural shape of the buttocks distributes pressure and avoids the local pressure and poor blood circulation problems caused by the existing flat seat surface. The front side of the backrest 3 has an arc structure that adapts to the curve of the human back, which can conform to the physiological curvature of the back and provide uniform support for the back, reducing back muscle fatigue during long-term sitting and solving the defect of insufficient support in the existing backrest 3. By strengthening the fixing structure 4, the stability of the connection between the seat 1 and the legs 2 is enhanced. The connection between the seat 1 and the legs 2 is provided with multiple circumferentially distributed protruding ribs. One end of the rib is connected to the seat 1 and the other end is connected to the legs 2, which can distribute the load in the stress concentration area and enhance the structural strength of the connection.
[0025] Reference Figure 3 , Figure 4 and Figure 5 The top height of the backrest 3 is adapted to the position of the human shoulder blade, and the backrest 3 and the seat 1 form a preset tilt angle. The upper part of the chair leg 2 is tilted away from the center of the seat 1, and the bottom of the chair leg 2 is provided with an anti-slip part 5. The top height of the backrest 3 is adapted to the position of the human shoulder blade, which can provide targeted support for the shoulder blade area and prevent the back from being unsupported. The preset tilt angle between the backrest 3 and the seat 1 conforms to the natural sitting posture of the human body, reduces back muscle tension, further optimizes the back support effect, and relieves fatigue from sitting for a long time. The upper part of the chair leg 2 is tilted away from the center of the seat 1, which expands the support span and reduces the risk of the chair tipping over. The anti-slip part 5 at the bottom of the chair leg 2 can enhance the friction with the ground and prevent slipping during use. This doubly improves the overall placement stability and solves the safety hazards of existing plastic chairs being easy to slide and tip over.
[0026] Reference Figure 2 , Figure 3 and Figure 5The seat 1 has an upward-curving edge 6 that smoothly transitions to the upper surface of the seat 1. The anti-slip part 5 is an outward-extending anti-slip pad from the bottom of the chair leg 2, and the lower surface of the anti-slip pad has anti-slip texture. The upward-curving edge 6 of the seat 1 can slightly limit the buttocks and prevent the body from sliding. The smooth transition design between the edge 6 and the upper surface of the seat 1 prevents the edge from hurting the body and improves the comfort of use. The outward-extending anti-slip pad of the anti-slip part 5 increases the contact area with the ground. The anti-slip texture on the lower surface of the anti-slip pad further enhances the friction and significantly improves the anti-slip effect, ensuring that the chair can be placed stably on a smooth surface.
[0027] Reference Figure 2 , Figure 3 and Figure 4 The raised ribs at the connection between the seat 1 and the legs 2 have an arc-shaped cross-section, and the thickness of the raised ribs gradually increases from both ends to the middle. The ends of the edge 6 are rounded, and the radius of the rounded corners matches the thickness of the edge 6. The connection between the backrest 3 and the seat 1 is provided with a transition rounded corner, which allows the bottom of the backrest 3 to smoothly connect with the rear edge of the seat 1. The arc-shaped cross-section of the raised ribs can more evenly distribute stress and reduce local stress concentration; the gradual increase in rib thickness from both ends to the middle can enhance the ribs' own load-bearing capacity and further improve... The structural strength and durability of the connection between the seat 1 and the legs 2 are enhanced by the rounded corner design at the end of the edge 6, which prevents sharp edges from hitting the human body and improves safety. The radius of the rounded corner is matched with the thickness of the edge 6, ensuring structural rationality while further optimizing contact comfort. The transition rounded corner at the connection between the backrest 3 and the seat 1 makes the connection between the two smooth, reducing the local pressure on the connection between the back and buttocks. At the same time, the rounded corner structure can disperse the stress in this area, enhance the fracture resistance of the connection between the backrest 3 and the seat 1, and improve the overall structural durability.
[0028] In this embodiment, the curved structure of the seat 1 and backrest 3 enhances human adaptability and comfort. The upper surface of the seat 1 is curved to conform to the curve of the human buttocks, allowing it to fit the natural shape of the buttocks during use, distributing pressure and avoiding the localized pressure and poor blood circulation problems caused by existing flat seat surfaces. The front side of the backrest 3 is curved to conform to the curve of the human back, fitting the physiological curvature of the back and providing even support, reducing back muscle fatigue from prolonged sitting, and solving the problem of insufficient support in existing backrests. Furthermore, the reinforced fixing structure… Structure 4 enhances the stability of the connection between the seat 1 and the leg 2. Multiple circumferentially distributed raised ribs are provided at the connection between the seat 1 and the leg 2. One end of the rib connects to the seat 1 and the other end connects to the leg 2, which can disperse the load in the stress concentration area and enhance the structural strength of the connection. In conjunction with the design of the raised ribs having an arc-shaped cross-section and a thickness that gradually increases from both ends to the middle, the arc-shaped cross-section can further disperse stress, and the gradual change in thickness can improve the load-bearing capacity of the ribs, effectively reducing the deformation of the chair when it is under load or moved, and solving the problem of easy deformation and easy tipping of the existing structure.
[0029] The implementation principle of this application embodiment is as follows: The seat 1, legs 2, and backrest 3 are formed into an integral structure using a one-piece molding process, ensuring the integrity and structural strength of the connection between each component, avoiding the risk of loosening in an assembled structure, and providing basic support for subsequent functional realization; the arc-shaped structure on the upper surface of the seat 1 conforms to the curve of the human buttocks, which can distribute the pressure on the buttocks and reduce local pressure during use; the arc-shaped structure on the front side of the backrest 3 conforms to the curve of the human back, and its top height is adapted to the position of the human shoulder blades and the preset tilt angle between it and the seat 1, which can provide uniform support for the back, guide a natural sitting posture, and reduce muscle tension; multiple protruding ribs at the connection between the seat 1 and the legs 2 are distributed circumferentially, with one end connected to the seat 1 and the other end connected to the legs 2, which can make the chair... The load borne by seat 1 is transferred to chair legs 2 and the stress is dispersed; the design of its arc-shaped cross-section and thickness gradually increasing from both ends to the middle further optimizes the stress distribution and enhances the deformation resistance of the connection; the upper part of chair legs 2 is inclined away from the center of seat 1, expanding the support span and reducing the risk of tipping over; the anti-slip part 5 at the bottom of chair legs 2 increases the friction with the ground and prevents the chair from sliding, forming a double stability guarantee in combination with the inclined design; the edge guard 6 of seat 1 is raised upward, providing slight restraint for the buttocks, and the smooth transition design avoids discomfort, while the rounded corners at the ends further improve contact safety; the rounded corners at the connection between backrest 3 and seat 1 make the connection smooth, reduce the pressure on the body contact area, and disperse the stress in this area, enhancing the structural durability.
Claims
1. A one-piece plastic chair, comprising a one-piece molded seat (1), legs (2), and backrest (3), characterized in that: The upper surface of the seat (1) is an arc-shaped structure adapted to the curve of the human hip; the front side of the backrest (3) is an arc-shaped structure adapted to the curve of the human back; a reinforcing fixing structure (4) is provided at the connection between the seat (1) and the legs (2), and multiple reinforcing fixing structures (4) are provided. The multiple reinforcing fixing structures (4) are raised ribs distributed circumferentially along the connection between the seat (1) and the legs (2), and one end of the raised rib is connected to the seat (1) and the other end is connected to the legs (2).
2. The one-piece plastic chair according to claim 1, characterized in that: The top height of the chair back (3) is adapted to the position of the human shoulder blade, and a preset tilt angle is formed between the chair back (3) and the seat (1).
3. The one-piece plastic chair according to claim 1, characterized in that: The upper part of the chair leg (2) is inclined away from the center of the seat (1), and the bottom of the chair leg (2) is provided with an anti-slip part (5).
4. The one-piece plastic chair according to claim 1, characterized in that: The edge of the seat (1) is provided with an upward-curving guard (6), and the guard (6) smoothly transitions to the upper surface of the seat (1).
5. The one-piece plastic chair according to claim 3, characterized in that: The anti-slip part (5) is an anti-slip pad extending outward from the bottom of the chair leg (2), and the lower surface of the anti-slip pad is provided with anti-slip texture.
6. The one-piece plastic chair according to claim 1, characterized in that: The cross-section of the raised rib at the connection between the seat (1) and the leg (2) is arc-shaped, and the thickness of the raised rib gradually increases from both ends to the middle.
7. The one-piece plastic chair according to claim 4, characterized in that: The end of the retaining edge (6) is provided with a rounded corner, and the radius of the rounded corner is adapted to the thickness of the retaining edge (6).
8. The one-piece plastic chair according to claim 1, characterized in that: The connection between the backrest (3) and the seat (1) is provided with a transition rounded corner, which makes the bottom of the backrest (3) and the rear edge of the seat (1) smoothly connected.