Component structure of a chair

Abstract

The present application discloses a component structure of a chair, comprising a bottom piece and a resilient piece arranged in the bottom piece and forming a closed space with the bottom piece, the resilient piece having a support side arranged in the bottom piece and a pressure receiving top arranged in the support side, the support side being divided into a first support section connected to the bottom piece and a second support section connected between the first support section and the pressure receiving top; when the bottom piece and the resilient piece are combined into a seat cushion, an armrest or a backrest, the resilient piece has different elastic modulus at the support side, so that the resilient piece can generate nonlinear amplitude reduction after the pressure receiving top is pressed, thereby improving the structural stability, support and comfort.

Description

Technical Field

[0001] This invention relates to a chair, and more particularly to the component structure of a chair. Background Technology

[0002] The primary function of a chair is to provide a comfortable sitting posture and support. For example... Figure 1 As shown, the chair 10 mainly comprises a seat cushion 12 on the chair legs 11, a backrest 13 on the seat cushion 12, and armrests 14 on the backrest 13. The seat cushion 12 provides a comfortable seating experience, distributes weight, and reduces pressure on the buttocks and thighs. The backrest 13 provides back support, helping to maintain correct posture and reduce back fatigue. The armrests 14 support the arms, reducing pressure on the shoulders and arms, and contributing to maintaining good posture.

[0003] However, since the seat cushion 12, backrest 13, and armrests 14 of this chair 10 currently primarily use foam as the main structural component, it suffers from problems such as poor durability, high water absorption, insufficient support, and difficulty in cleaning, thus requiring improvement. Specifically, poor durability: low-density foam is prone to deformation and collapse over time, and may deform or lose elasticity after prolonged use. High water absorption: most foam materials easily absorb water, leading to internal dampness during prolonged sitting or in humid environments, affecting comfort and hygiene. Insufficient support: low-density foam provides insufficient support, which may cause muscle fatigue and discomfort after prolonged use. Difficult cleaning: the foam surface is difficult to clean, and stains easily penetrate, affecting appearance and hygiene. Summary of the Invention

[0004] The purpose of this invention is to provide a component structure for a chair that can solve one of the above-mentioned problems.

[0005] To achieve the aforementioned objective, the present invention provides a component structure for a chair, comprising: a base member; and an elastic member disposed on the base member and forming a closed space therewith. The elastic member has a supporting side portion disposed on the base member and a pressure-receiving top portion disposed on the supporting side portion. The supporting side portion is divided into a first supporting segment connecting the base member and a second supporting segment connecting the first supporting segment and the pressure-receiving top portion. The elastic modulus of the first supporting segment is greater than that of the second supporting segment, and the elastic modulus of the second supporting segment is greater than that of the pressure-receiving top portion.

[0006] The advantages of this invention are as follows: By combining the base component and the elastic component to form a seat cushion, armrest, or chair back, the elastic component is designed with different elastic moduli on its supporting side. This allows the elastic component to produce a non-linear reduction in pressure when the top of the elastic component is compressed, thereby improving structural stability, support, and comfort. In addition, the closed space designed in this invention, with the gas contained within the closed space as a medium, allows the applied force to be evenly transmitted to the overall structure of the elastic component, thereby effectively offsetting potential stress concentration areas and further reducing the risk of material damage due to elastic fatigue.

[0007] Preferably, the thickness of the support side gradually decreases from the bottom member toward the pressure-bearing top.

[0008] Preferably, the bottom member has an end face, an annular side face connecting the end face, and an annular recess disposed between the end face and the annular side face, and a portion of the first support section of the support side of the elastic member is engaged in the annular recess.

[0009] Preferably, it also includes a seal that seals the outer surface of the support side and the annular side surface of the base.

[0010] Preferably, the outer surface of the support side of the elastic member is provided with a plurality of interlocking convex and concave structures in the direction from the bottom member toward the pressure-bearing top.

[0011] Preferably, both the first and second support sections of the support side of the elastic member are arc-shaped.

[0012] Preferably, the first support segment of the support side of the elastic member is straight, and 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-bearing top of the elastic member has a pressure-bearing outer surface, and the component structure of the chair also has a reinforcing rib unit, which is disposed on the pressure-bearing outer surface of the elastic member and is formed by multiple reinforcing ribs interlacing.

[0015] Preferably, the pressure-bearing top of the elastic member has a pressure-bearing inner surface, and the component structure of the chair also has a reinforcing rib unit, which is disposed on the pressure-bearing inner surface of the elastic member and is formed by multiple reinforcing ribs interlacing. Attached Figure Description

[0016] Figure 1 It is a 3D model of an existing chair; Figure 2 This is a perspective view of the first embodiment of the present invention, showing the state in which the base and the elastic member are combined to form a seat cushion; Figure 3 This is a cross-sectional view of the first embodiment of the present invention; Figure 4A This is a schematic diagram of the usage state of the first embodiment of the present invention, showing the state in which the applied force is less than the elastic modulus of the compressed top; Figure 4B This is a schematic diagram of the usage state of the first embodiment of the present invention, showing the state in which the applied force is greater than the elastic modulus of the compressed top; Figure 4C This is a schematic diagram of the usage state of the first embodiment of the present invention, showing the state in which the applied force is greater than the elastic modulus of the second support segment; Figure 4D This is a schematic diagram of the usage state of the first embodiment of the present invention, showing the state in which the applied force is greater than the elastic modulus of the first support segment; Figure 5A This is a schematic diagram of the usage state of the first embodiment of the present invention, showing the force state of the elastic element when a positive force is applied; Figure 5B This is a schematic diagram of the usage state of the first embodiment of the present invention, showing the force state of the elastic element when a lateral force is applied; Figure 6A This is a cross-sectional view of the second embodiment of the present invention; Figure 6B This is a schematic diagram of the second embodiment of the present invention, showing the force state of the elastic element when a lateral force is applied; Figure 7 This is a cross-sectional view of the third embodiment of the present invention; Figure 8 This is a perspective view of the fourth embodiment of the present invention, showing the state in which the base and the elastic member are combined to form a handrail; Figure 9 This is a perspective view of the fifth embodiment of the present invention, showing the separated state of the elastic member having a reinforcing rib unit; Figure 10 This is a cross-sectional view of the fifth embodiment of the present invention, showing the cross-sectional state of the elastic member having reinforcing rib units; and Figure 11 This is a cross-sectional view of the sixth embodiment of the present invention, showing the cross-sectional state of the elastic member having a reinforcing rib unit.

[0017] 10…chairs 11… Chair legs 12…seat cushion 13… Chair back 14…Handrail 20, 20B... Bottom part 21…end face 22…Ring side 23… Circular Recess 30, 30A, 30B... Elastic components 31, 31A… Support side 311, 311A… First support section 312, 312A… Second support section 313…convex structure 314… Concave structure 32…Pressure Top 321…Compressed outer surface 322…Compressed inner surface 40…Seals 50… Enclosed space 100… cushion 200… handrail Detailed Implementation

[0018] See Figure 2 and Figure 3 As shown, the first embodiment of the present invention provides a chair component structure, which mainly consists of a base 20, an elastic member 30, and a sealing member 40. In this embodiment, the base 20, the elastic member 30, and the sealing member 40 are combined to form a seat cushion 100, wherein: The base 20 is plate-shaped and made of rigid material (nylon + glass fiber or polypropylene (PP) + glass fiber or polycarbonate (PC) + acrylonitrile-butadiene-styrene (ABS)). The base 20 has an end face 21, an annular side face 22 connecting the end face 21, and an annular recess 23 provided between the end face 21 and the annular side face 22.

[0019] The elastic element 30 is made of an elastic material (polypropylene (PP), thermoplastic polyurethane (TPU), or nylon elastomer) by injection molding. The elastic element 30 is disposed on the base 20 and forms a closed space 50 with the base 20. The closed space 50 contains gas. The elastic element 30 has a supporting side 31 disposed on the base 20 and a pressure-receiving top 32 disposed on the supporting side 31. The thickness of the supporting side 31 gradually decreases from the base 20 towards the pressure-receiving top 32, and the supporting side 31 is divided into a first supporting section 311 connecting to the base 20, and... A second support segment 312 connects the first support segment 311 and the pressure-bearing top 32. Both the first support segment 311 and the second support segment 312 are arc-shaped. The first support segment 311 is partially connected to the annular recess 23 of the base member 20. In addition, the elastic modulus of the first support segment 311 is greater than that of the second support segment 312, and the elastic modulus of the second support segment 312 is greater than that of the pressure-bearing top 32. In this embodiment, the elastic modulus is a physical quantity that measures the ability of the elastic member 30 to resist deformation when subjected to force. It is defined as the ratio between stress and strain of the elastic member 30 within the elastic deformation range.

[0020] The seal 40 is annular and is chemically bonded to the base 20 and the elastic member 30. In this embodiment, the seal 40 is applied to the outer surface of the support side 31 and the annular side surface 22 of the base 20 to improve the bonding strength and sealing performance between the base 20 and the elastic member 30.

[0021] The above describes the configuration of the main components in the first embodiment of the present invention. The operation and effects of the present invention are explained below.

[0022] When the user sits on the component of this invention (cushion 100), refer to Figure 4A As shown, when the pressure P1 applied to the elastic member 30 is less than the elastic modulus of the pressure-bearing top 32, the pressure-bearing top 32, the first support section 311, and the second support section 312 of the elastic member 30 will not deform, indicating that the cushion 100 has sufficient stability and support to withstand the pressure applied to the cushion 100 by the user.

[0023] See Figure 4B As shown, when the pressure P2 applied to the elastic member 30 is greater than the elastic modulus of the pressure-bearing top 32, but less than the sum of the elastic moduli of the pressure-bearing top 32 and the second support section 312, the pressure-bearing top 32 of the elastic member 30 will bend and deform, while the first support section 311 and the second support section 312 will not be deformed. This indicates that the seat cushion 100 has sufficient stability and support while being comfortable, and is sufficient to withstand the pressure applied to the seat cushion 100 by the user.

[0024] See Figure 4C As shown, when the pressure P3 applied to the elastic member 30 is greater than the sum of the elastic moduli of the pressure-bearing top 32 and the second support section 312, but less than the sum of the elastic moduli of the pressure-bearing top 32, the second support section 312, and the first support section 311, the pressure-bearing top 32 and the second support section 312 of the elastic member 30 will bend and deform, while the first support section 311 will not deform. This indicates that the seat cushion 100 is more comfortable and maintains its stability and support, which is sufficient to withstand the pressure applied to the seat cushion 100 by the user.

[0025] See Figure 4D As shown, when the pressure P4 applied to the elastic member 30 is greater than the sum of the elastic moduli of the pressure-bearing top 32, the second support section 312 and the first support section 311, the pressure-bearing top 32, the second support section 312 and the first support section 311 of the elastic member 30 will bend and deform, indicating that the seat cushion 100 is most comfortable and the pressure it can withstand is close to the limit, but it can still support the user's weight.

[0026] See Figure 5A and 5B As shown, since the present invention combines the base 20 and the elastic member 30 to form a seat cushion 100, a closed space 50 is formed. This closed space 50 contains gas. Therefore, due to Pascal's principle, regardless of whether a positive force is applied ( Figure 5A ) or lateral force ( Figure 5B When the elastic element 30 is subjected to gas in the enclosed space 50, the pressure applied to the elastic element 30 can be evenly distributed.

[0027] Accordingly, the present invention combines the base component and the elastic component to form a seat cushion, armrest, or chair back. By designing the supporting side of the elastic component with different elastic moduli, the elastic component can generate a non-linear reduction amplitude after being compressed at the top, thereby improving structural stability, support, and comfort. In addition, with the enclosed space designed in the present invention, the gas contained in the enclosed space serves as a medium, allowing the applied force to be evenly transmitted to the overall structure of the elastic component, thereby effectively offsetting potential stress concentration areas and further reducing the risk of material damage due to elastic fatigue.

[0028] It is worth mentioning that the elastic component of this invention is mainly made of elastic plastic, so it is not easily deformed or collapsed over time and can maintain its elasticity even after prolonged use. Furthermore, this elastic plastic does not absorb water, so it is less likely to cause internal dampness in environments with prolonged sitting or humidity, thus affecting comfort and hygiene. At the same time, the material is easy to clean; stains do not penetrate, effectively maintaining appearance and hygiene.

[0029] See Figure 6A and Figure 6B As shown, the component structure of the chair provided in the second embodiment of the present invention differs from that in the first embodiment in that: The outer surface of the supporting side 31 of the elastic member 30 is provided with a plurality of interlocking convex structures 313 and concave structures 314 in the direction from the bottom member 20 toward the pressure-bearing top 32; through the design of the convex structures 313 and concave structures 314, the elastic member 30 can withstand pressure in both positive and negative directions ( Figure 6A ) or lateral pressure ( Figure 6B Afterwards, once the pressure-bearing top 32, the second support section 312, and the first support section 311 deform, the deformation of the elastic member 30 will be directional and regular. Specifically, the elastic member 30 will preferentially deform from the concave structure 314, thereby avoiding irregular deformation and ensuring that comfort and support are not affected.

[0030] See Figure 7 As shown, the component structure of the chair provided in the third embodiment of the present invention differs from that in the first embodiment in that: The first support segment 311A ​​of the support side 31A of the elastic element 30A is straight, while the second support segment 312A remains curved. The design of the straight first support segment 311A ​​enhances the overall support of the elastic element 30A.

[0031] See Figure 8 As shown, the component structure of the chair provided in the fourth embodiment of the present invention differs from that in the first embodiment in that: The base component 20B and the elastic component 30B are combined to form the armrest 200, but this is not a limitation; they can also be combined to form a chair back or other support components. It is worth noting that when the bonding strength between the base component and the elastic component is sufficient, a sealing component is not required to bond the base component and the elastic component together.

[0032] See Figure 9 and Figure 10 As shown, the fifth embodiment of the present invention provides a chair component structure that differs from the first embodiment in that: The pressure-bearing top 32 of the elastic member 30 has a pressure-bearing outer surface 321; The chair's component structure also includes a reinforcing rib unit 60, which is disposed on the pressure-bearing outer surface 321 of the elastic member 30 and is formed by multiple reinforcing ribs 61 interlaced. In this embodiment, the reinforcing rib unit 60 and the elastic member 30 are made of the same material or different materials, and the reinforcing rib unit 60 is directly formed or separately disposed on the elastic member 30.

[0033] The design of the reinforcing rib unit 60 not only enhances the structural strength of the pressure-bearing top 32 of the elastic member 30, but also effectively reduces the concentrated deformation of the pressure-bearing top 32 of the elastic member 30 under pressure, thereby effectively improving the comfort and stability of the seat cushion 12.

[0034] See Figure 11 As shown, the sixth embodiment of the present invention provides a chair component structure that differs from the first embodiment in that: The pressure-receiving top 32 of the elastic member 30 has a pressure-receiving inner surface 322; The chair's component structure also includes a reinforcing rib unit 60, which is formed on the pressure-bearing inner surface 322 of the elastic member 30 and is formed by multiple reinforcing ribs 61 interlaced. In this embodiment, the reinforcing rib unit 60 and the elastic member 30 are made of the same material or different materials, and the reinforcing rib unit 60 is directly formed or separately disposed on the elastic member 30.

[0035] The design of the reinforcing rib unit 60 not only enhances the structural strength of the pressure-bearing top 32 of the elastic member 30, but also effectively reduces the concentrated deformation of the pressure-bearing top 32 of the elastic member 30 under pressure, thereby effectively improving the comfort and stability of the seat cushion 12.

[0036] The above are merely preferred embodiments of the present invention and are not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A component structure for a chair, characterized in that: Include: One bottom piece; An elastic member is disposed on the base member and forms a closed space with the base member. The elastic member has a supporting side portion disposed on the base member and a pressure-receiving top portion disposed on the supporting side portion. The supporting side portion is divided into a first supporting segment connecting the base member and a second supporting segment connecting the first supporting segment and the pressure-receiving top portion. The elastic modulus of the first supporting segment is greater than the elastic modulus of the second supporting segment, and the elastic modulus of the second supporting segment is greater than the elastic modulus of the pressure-receiving top portion.

2. The component structure of the chair as described in claim 1, characterized in that: The thickness of the supporting side gradually decreases from the bottom part toward the pressure-bearing top.

3. The component structure of the chair as described in claim 1, characterized in that: The bottom member has an end face, an annular side face connecting the end face, and an annular recess between the end face and the annular side face, and a portion of the first support section of the support side of the elastic member is attached to the annular recess.

4. The component structure of the chair as described in claim 3, characterized in that: It also includes a seal that is applied to the outer surface of the support side and the annular side of the base.

5. The component structure of the chair as described in claim 1, characterized in that: The outer surface of the supporting side of the elastic member has multiple interlocking convex and concave structures in the direction from the bottom member toward the pressure-bearing top.

6. The component structure of the chair as described in claim 1, characterized in that: Both the first and second support sections of the support side of the elastic element are arc-shaped.

7. The component structure of the chair as described in claim 1, characterized in that: The first support section of the support side of the elastic element is straight, and the second support section is arc-shaped.

8. The component structure of the chair as described in claim 1, characterized in that: The base and the elastic element are combined to form a seat cushion or armrest.

9. The component structure of the chair as described in claim 1, characterized in that: The elastic member has a pressure-bearing outer surface at the top of the elastic member. The component structure of the chair also has a reinforcing rib unit, which is provided on the pressure-bearing outer surface of the elastic member and is formed by multiple reinforcing ribs interlacing.

10. The component structure of the chair as described in claim 1, characterized in that: The elastic member has a pressure-bearing inner surface at the top of the elastic member. The component structure of the chair also has a reinforcing rib unit, which is provided on the pressure-bearing inner surface of the elastic member and is formed by multiple reinforcing ribs interlacing.

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