Chair component structure

Abstract

A chair component structure, comprising: a base part (20); and an elastic element (30) arranged on the bottom part (20) and forming a closed space (50) together with the bottom part (20) and comprising a support side section (31) provided on the bottom part (20) and a pressure-absorbing upper section (32) provided on the support side section (31), wherein the support side section (31) is divided into a first support segment (311) connected to the bottom part (20) and a second support segment (312) located between the first support segment (311) and the pressure-absorbing upper section (32) and connected to both of them, wherein the elastic modulus of the first support segment (311) is greater than the elastic modulus of the second support segment (312) and the elastic modulus of the second support segment (312) is greater than the elastic modulus of the pressure-absorbing upper section (32).

Description

Field of invention

[0001] The present invention relates to a chair and in particular to a chair component structure. State of the art

[0002] The main function of a chair is to provide a comfortable sitting posture and support. As in Fig. As shown in Figure 1, the components of the chair 10 primarily comprise a seat cushion 12 arranged on chair legs 11, a backrest 13 attached to the seat cushion 12, and armrests 14 attached to the backrest 13. The seat cushion 12 is designed to provide a comfortable seating experience, distribute body weight, and reduce pressure on the buttocks and thighs. The backrest 13 is designed to support the back, thereby promoting correct posture and reducing back fatigue. The armrests 14 are designed to support the arms, reduce pressure on the shoulders and arms, and promote good posture.

[0003] However, since foam is currently predominantly used as the main structural element for components such as the seat cushion 12, the backrest 13 or the armrests 14 of the chair 10, there are problems such as low durability, high water absorption, insufficient support and difficult cleaning, so there is a need for improvement.The following applies: Low durability: Low-density foams tend to deform over time and can lose their shape or elasticity after prolonged use; High water absorption: Most foam materials readily absorb water, which can lead to internal moisture buildup during prolonged sitting or in humid environments, compromising comfort and hygiene; Insufficient support: Low-density foams offer inadequate support, which can lead to muscle fatigue and discomfort during prolonged use; Difficulty cleaning: The surface of foams is difficult to clean, allowing dirt to penetrate easily, affecting appearance and hygiene. Object of the invention

[0004] The invention is based on the objective of solving the problems mentioned above and providing a chair component structure.

[0005] To solve the above-mentioned problem, the present invention provides a chair component structure comprising: a base part; and an elastic element arranged on the base part, forming a closed space together with the base part, and comprising a support side section and a pressure-absorbing upper section provided on the base part, wherein the support side section is divided into a first support segment connected to the base part and a second support segment located between the first support segment and the pressure-absorbing upper section and connected to both of them, wherein the elastic modulus of the first support segment is greater than the elastic modulus of the second support segment and the elastic modulus of the second support segment is greater than the elastic modulus of the pressure-absorbing upper section.

[0006] The advantageous effects of the present invention consist in the fact that, after combining the base section with the elastic element to form a seat cushion, armrest, or backrest, the design of the support side section of the elastic element with different moduli of elasticity ensures that, after loading the pressure-bearing upper section of the elastic element, a non-linear deflection of the elastic element occurs, thereby improving structural stability, support, and comfort. Furthermore, in combination with the enclosed space according to the invention, the gas contained therein, serving as the medium, distributes the applied force uniformly across the entire structure of the elastic element, effectively compensating for potential stress concentration areas and further reducing the risk of material damage due to elastic fatigue.

[0007] Preferably, the thickness of the support side section gradually decreases from the bottom part towards the pressure-bearing upper section.

[0008] Preferably, the bottom part has an end surface, an annular side surface connected to the end surface, and an annular recess provided between the end surface and the annular side surface.

[0009] Preferably, the chair component structure further comprises a sealing element, wherein the sealing element seals the outer surface of the support side section and the annular side surface of the base part.

[0010] Preferably, several intersecting protruding structures and recessed structures are formed on the outer surface of the support side section of the elastic element from the bottom part towards the pressure-bearing upper section.

[0011] Preferably, both the first support segment and the second support segment of the support side section of the elastic element are arc-shaped.

[0012] Preferably, the first support segment of the support side section of the elastic element is straight, while the second support segment is arc-shaped.

[0013] Preferably, the base and the elastic element are combined to form a seat cushion or armrest.

[0014] Preferably, the pressure-absorbing upper section of the elastic element has a pressure-absorbing outer surface, wherein the chair component structure further comprises a reinforcing rib unit which is arranged on the pressure-absorbing outer surface of the elastic element and consists of several intersecting reinforcing ribs.

[0015] Preferably, the pressure-absorbing upper section of the elastic element has a pressure-absorbing inner surface, wherein the chair component structure further comprises a reinforcing rib unit which is arranged on the pressure-absorbing inner surface of the elastic element and consists of several intersecting reinforcing ribs. Brief description of the drawings Fig. Figure 1 shows a perspective view of a conventional chair; Fig. Figure 2 shows a perspective view according to a first embodiment of the present invention, in which the base part and the elastic element are combined to form a seat cushion; Fig. 3 shows a sectional view according to the first embodiment of the present invention; Fig. Figure 4A shows a schematic view of the state of use according to the first embodiment of the present invention, in which the applied force is smaller than the modulus of elasticity of the pressure-bearing upper section; Fig. Figure 4B shows a schematic view of the state of use according to the first embodiment of the present invention, in which the applied force is greater than the modulus of elasticity of the pressure-bearing upper section; Fig. Figure 4C shows a schematic view of the state of use according to the first embodiment of the present invention, in which the applied force is greater than the modulus of elasticity of the second support segment; Fig. Figure 4D shows a schematic view of the state of use according to the first embodiment of the present invention, in which the applied force is greater than the modulus of elasticity of the first support segment; Fig. Figure 5A shows a schematic view of the state of use according to the first embodiment of the present invention, which shows the force state of the elastic element under axial force; Fig. Figure 5B shows a schematic view of the state of use according to the first embodiment of the present invention, which shows the force state of the elastic element under lateral force; Fig. 6A shows a sectional view according to a second embodiment of the present invention; Fig. Figure 6B shows a schematic view of the state of use according to the second embodiment of the present invention, which shows the force state of the elastic element under lateral force; Fig. 7 shows a sectional view according to a third embodiment of the present invention; Fig. Figure 8 shows a perspective view according to a fourth embodiment of the present invention, in which the base part and the elastic element are combined to form an armrest; Fig. Figure 9 shows a perspective view according to a fifth embodiment of the present invention in the separated state, in which the elastic element is provided with a reinforcing rib unit; Fig. Figure 10 shows a sectional view according to the fifth embodiment of the present invention, in which the elastic element is provided with a reinforcing rib unit; Fig. Figure 11 shows a sectional view according to a sixth embodiment of the present invention, in which the elastic element is provided with a reinforcing rib unit. Detailed description of the exemplary implementations

[0016] It will be directed to the Fig. 2 and Fig. Reference is made to Figure 3, which shows the chair component structure according to a first embodiment of the present invention. The chair component structure primarily consists of a base part 20, an elastic element 30, and a sealing element 40. In the present embodiment, the base part 20, the elastic element 30, and the sealing element 40 are combined to form a seat cushion 100.

[0017] The base part 20 is plate-shaped and made of a rigid material (nylon + glass fiber or polypropylene (PP) + glass fiber or polycarbonate (PC) + acrylonitrile butadiene styrene (ABS)). The base part 20 has an end surface 21, an annular side surface 22 connected to the end surface 21, and an annular recess 23 provided between the end surface 21 and the annular side surface 22.

[0018] The elastic element 30 is manufactured from an elastic material (polypropylene (PP), thermoplastic polyurethane (TPU), or nylon elastomer) using injection molding. The elastic element 30 is arranged on the base part 20 and, together with the base part 20, forms a closed chamber 50, which contains a gas. The elastic element 30 has a support side section 31 provided on the base part 20 and a pressure-bearing upper section 32 provided on the support side section 31. The thickness of the support side section 31 gradually decreases from the base part 20 towards the pressure-bearing upper section 32. The support side section 31 is subdivided into a first support segment 311 connected to the base part 20 and a second support segment 312 located between and connected to the first support segment 311 and the pressure-bearing upper section 32.Both the first support segment 311 and the second support segment 312 are arc-shaped, with a portion of the first support segment 311 connected to the annular recess 23 of the base section 20. Furthermore, the elastic modulus of the first support segment 311 is greater than the elastic modulus of the second support segment 312, and the elastic modulus of the second support segment 312 is greater than the elastic modulus of the pressure-bearing upper section 32. In this embodiment, the term "elastic modulus" refers to a physical quantity that indicates the ability of the elastic element 30 to resist deformation under load, defined as the ratio between stress and strain in the elastic deformation range of the elastic element 30.

[0019] The sealing element 40 is ring-shaped and chemically connects the base part 20 and the elastic element 30. In the present embodiment, the sealing element 40 seals the outer surface of the support side section 31 and the ring-shaped side surface 22 of the base part 20 in order to increase the bond strength and tightness between the base part 20 and the elastic element 30.

[0020] The above description explains the configuration of the main components of the first embodiment of the present invention. The following section explains the function and advantageous effects of the present invention.

[0021] It will be on Fig. 4A. When a user sits on the component according to the invention (the seat cushion 100) and the load P1 exerted on the elastic element 30 is less than the modulus of elasticity of the pressure-bearing upper section 32, neither the pressure-bearing upper section 32 nor the first support segment 311 or the second support segment 312 experience any deformation. This shows that the seat cushion 100 provides sufficient stability and support to absorb the pressure exerted on the seat cushion 100 by the user.

[0022] It will be on Fig. Reference is made to 4B. If the load P2 exerted on the elastic element 30 is greater than the modulus of elasticity of the pressure-bearing upper section 32, but less than the sum of the moduli of elasticity of the pressure-bearing upper section 32 and the second support segment 312, the pressure-bearing upper section 32 undergoes bending deformation, while neither the first support segment 311 nor the second support segment 312 deforms. This shows that the seat cushion 100, with its increased comfort effect, still provides sufficient stability and support to absorb the pressure exerted on the seat cushion 100 by the user.

[0023] It will be on Fig. Reference is made to section 4C. If the load P3 exerted on the elastic element 30 is greater than the sum of the elastic moduli of the pressure-bearing upper section 32 and the second support segment 312, but less than the sum of the elastic moduli of the pressure-bearing upper section 32, the second support segment 312, and the first support segment 311, the pressure-bearing upper section 32 and the second support segment 312 of the elastic element 30 undergo bending deformation, while the first support segment 311 remains undeformed. This demonstrates that the seat cushion 100 offers further increased comfort while still providing sufficient stability and support to absorb the pressure exerted on the seat cushion 100 by the user.

[0024] It will be on Fig. 4D reference is made. If the load P4 exerted on the elastic element 30 is greater than the sum of the elastic moduli of the pressure-bearing upper section 32, the second support segment 312, and the first support segment 311, the pressure-bearing upper section 32, the second support segment 312, and the first support segment 311 of the elastic element 30 undergo bending deformation. This shows that the seat cushion 100 offers the highest level of comfort, with the load-bearing capacity reaching a limit, but still being able to support the user's weight while seated.

[0025] It will be directed to the Fig. 5A and Fig. Reference is made to 5B. In the present invention, the base part 20 and the elastic element 30 are combined to form the seat cushion 100, creating a closed space 50. The closed space 50 contains a gas. Due to the influence of Pascal's principle, therefore, regardless of whether an axial force is applied ( Fig. 5A) or a lateral force ( Fig. 5B) on the elastic element 30, the pressure exerted on the elastic element 30 is evenly distributed by the gas contained in the closed space 50.

[0026] Accordingly, in the present invention, after combining the base section with the elastic element to form a seat cushion, armrest, or backrest, the design of the support side section of the elastic element with different moduli of elasticity ensures that, after loading the pressure-bearing upper section of the elastic element, a non-linear deflection of the elastic element occurs, thereby improving structural stability, support, and comfort. Furthermore, in combination with the enclosed space designed according to the invention, the gas contained within it, serving as the medium, distributes the applied force uniformly across the entire structure of the elastic element, effectively compensating for potential stress concentration areas and further reducing the risk of material damage due to elastic fatigue.

[0027] It is worth emphasizing that in the present invention, the elastic element is predominantly made of elastic plastic and therefore does not easily deform or sag over time, so that its elasticity is maintained even after prolonged use. Furthermore, this elastic plastic does not absorb water, so that even during prolonged sitting or in humid environments, no internal dampness occurs that could impair comfort or hygiene. At the same time, this material has good cleaning properties, as dirt does not penetrate it and the external appearance and hygiene are effectively maintained.

[0028] It will be directed to the Fig. 6A and Fig. Reference is made to Figure 6B, which shows the chair component structure according to a second embodiment of the present invention. The difference to the first embodiment is described below:

[0029] On the outer surface of the support side section 31 of the elastic element 30, several intersecting projecting structures 313 and recessed structures 314 are formed from the bottom section 20 towards the pressure-bearing upper section 32. The projecting structures 313 and the recessed structures 314 are designed to ensure that the elastic element 30 is supported under both axial loading ( Fig. 6A) as well as under lateral load ( Fig. 6B), as soon as the pressure-bearing upper section 32, the second support segment 312 and the first support segment 311 are deformed, exhibits a directed and ordered deformation. Specifically, the deformation of the elastic element 30 preferably occurs starting from the recessed structures 314, thereby avoiding irregular deformations and ensuring that comfort and support are not impaired.

[0030] It will be on Fig. Reference is made to Figure 7, which shows the chair component structure according to a third embodiment of the present invention. The difference to the first embodiment is described below:

[0031] The first support segment 311A ​​of the support side section 31A of the elastic element 30A is straight, while the second support segment 312A remains curved. The straight design of the first support segment 311A ​​increases the overall support effect of the elastic element 30A.

[0032] It will be on Fig. Reference is made to Figure 8, which shows the chair component structure according to a fourth embodiment of the present invention. The difference from the first embodiment is described below:

[0033] The base section 20B and the elastic element 30B are combined to form an armrest 200, but this is not a limitation. They can also be combined to form a backrest or other components designed for leaning against. It should be noted that if the connection between the base section and the elastic element is sufficiently strong, a sealing element is not required to join them into a single unit.

[0034] It will be directed to the Fig. 9 and Fig. Reference is made to Figure 10, which shows the chair component structure according to a fifth embodiment of the present invention. The difference from the first embodiment is described below:

[0035] The pressure-absorbing upper section 32 of the elastic element 30 has a pressure-absorbing outer surface 321.

[0036] The chair component structure further comprises a reinforcing rib unit 60, which is arranged on the pressure-bearing outer surface 321 of the elastic element 30 and consists of several intersecting reinforcing ribs 61. In the present embodiment, the reinforcing rib unit 60 and the elastic element 30 are made of the same material or of different materials, wherein the reinforcing rib unit 60 is either directly molded onto the elastic element 30 or attached to it separately.

[0037] The reinforcement rib unit 60 is designed in such a way that not only is the structural strength of the pressure-absorbing upper section 32 of the elastic element 30 increased, but also, in view of the fact that the pressure-absorbing upper section 32 of the elastic element 30 experiences a locally concentrated deformation under load, an effective reduction is achieved, thereby effectively improving the comfort and stability of the seat cushion 12.

[0038] It will be on Fig. Reference is made to 11, which shows the chair component structure according to a sixth embodiment of the present invention. The difference from the first embodiment is described below:

[0039] The pressure-absorbing upper section 32 of the elastic element 30 has a pressure-absorbing inner surface 322.

[0040] The chair component structure further comprises a reinforcing rib unit 60, which is arranged on the pressure-bearing inner surface 322 of the elastic element 30 and consists of several intersecting reinforcing ribs 61. In the present embodiment, the reinforcing rib unit 60 and the elastic element 30 are made of the same material or of different materials, wherein the reinforcing rib unit 60 is either directly molded onto the elastic element 30 or attached to it separately.

[0041] The reinforcement rib unit 60 is designed in such a way that not only is the structural strength of the pressure-absorbing upper section 32 of the elastic element 30 increased, but also, in view of the fact that the pressure-absorbing upper section 32 of the elastic element 30 experiences a locally concentrated deformation under load, an effective reduction is achieved, thereby effectively improving the comfort and stability of the seat cushion 12.

[0042] The present invention relates to a chair component structure comprising a base part; and an elastic element arranged on the base part and forming a closed space together with the base part, comprising a support side section provided on the base part and a pressure-absorbing upper section provided on the support side section, wherein the support side section is divided into a first support segment connected to the base part and a second support segment located between the first support segment and the pressure-absorbing upper section and connected to both of them.After combining the base section with the elastic element to form a seat cushion, armrest or backrest, the design of the support side section of the elastic element with different moduli of elasticity ensures that, after the load is applied to the pressure-absorbing upper section of the elastic element, a non-linear lowering of the elastic element is achieved, thereby improving structural stability, support and comfort.

Claims

[1] A chair component structure, comprising: a base part (20); and an elastic element (30) arranged on the bottom part (20) and forming a closed space (50) together with the bottom part (20) and comprising a support side section (31) provided on the bottom part (20) and a pressure-absorbing upper section (32) provided on the support side section (31), wherein the support side section (31) is divided into a first support segment (311) connected to the bottom part (20) and a second support segment (312) located between the first support segment (311) and the pressure-absorbing upper section (32) and connected to both of them, wherein the elastic modulus of the first support segment (311) is greater than the elastic modulus of the second support segment (312) and the elastic modulus of the second support segment (312) is greater than the elastic modulus of the pressure-absorbing upper section (32). [2] Chair component structure according to claim 1, wherein the thickness of the support side section (31) gradually decreases from the bottom section (20) towards the pressure-bearing upper section (32). [3] Chair component structure according to claim 1, wherein the base part (20) has an end surface (21), an annular side surface (22) connected to the end surface (21) and an annular recess (23) provided between the end surface (21) and the annular side surface (22). [4] Chair component structure according to claim 3, wherein the chair component structure further comprises a sealing element (40), the sealing element (40) being sealing on the outer surface of the support side section (31) and the annular side surface of the base part (20). [5] Chair component structure according to claim 1, in which several intersecting protruding structures (313) and recessed structures (314) are formed on the outer surface of the support side section (31) of the elastic element (30) from the base section (20) towards the pressure-bearing upper section (32). [6] Chair component structure according to claim 1, wherein both the first support segment (311) and the second support segment (312) of the support side section (31) of the elastic element (30) are arc-shaped. [7] Chair component structure according to claim 1, wherein the first support segment (311) of the support side section (31) of the elastic element (30) is straight, while the second support segment (312) is curved. [8] Chair component structure according to claim 1, wherein the base part (20) and the elastic element (30) are combined to form a seat cushion (12) or an armrest (14). [9] Chair component structure according to claim 1, wherein the pressure-absorbing upper section (32) of the elastic element (30) has a pressure-absorbing outer surface (321), the chair component structure further comprising a reinforcing rib unit (60) arranged on the pressure-absorbing outer surface (321) of the elastic element (30) and consisting of several intersecting reinforcing ribs (61). [10] Chair component structure according to claim 1, wherein the pressure-absorbing upper section (32) of the elastic element (30) has a pressure-absorbing inner surface (322), the chair component structure further comprising a reinforcing rib unit (60) arranged on the pressure-absorbing inner surface (322) of the elastic element (30) and consisting of several intersecting reinforcing ribs (61).

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