Elastic structure for weight dispersion, weight support and ventilation functions and seat cushion comprising same

Abstract

The present invention relates to an elastic structure for weight dispersion, weight support and ventilation functions, and a seat cushion comprising the same. The elastic structure according to the present invention comprises: an outer cylinder in the shape of a hexagonal column, the upper end and the lower end of the outer cylinder being open, and forming corners connecting side surfaces; and an inner cylinder disposed inside the outer cylinder and connected to the inner peripheral surface of the outer cylinder.

Description

Technical Field

[0001] The present invention relates to an elastic structure for dispersing body weight, supporting body weight and having ventilation functions, which can be used for seat cushions, mattresses and bed covers, and a seat cushion using the elastic structure. Background Art

[0002] Figure 22a This is an example of sitting in the wrong posture. Figure 22b This is an example of correct sitting posture (source: wikihow).

[0003] Reference Figure 22a When users sit at a desk, their gaze is directed forward, causing their upper body to unconsciously lean forward. Consequently, their lower body also tilts forward, causing the entire body to lean forward. As the body leans forward, the hips gradually shift upward and the knees drop, causing the body to slide down the chair. Ultimately, the buttocks rest on the edge of the chair. This, combined with prolonged use of the chair, can cause the spine to curve and even develop a forward head posture.

[0004] Therefore, in order to maintain Figure 22b The correct sitting posture shown requires a seat cushion that can maximize the fit of the buttocks and waist to the backrest, and stimulate and relax the spinal discs and muscles through the correct sitting posture. Summary of the Invention

[0005] Technical issues to be solved

[0006] The problems to be solved by the present invention are as follows.

[0007] First, an elastic structure is provided that can maintain a correct sitting posture by distributing the pressure while preventing the seat cushion from being overly compressed.

[0008] Second, to provide an elastic structure with strong elasticity and excellent durability.

[0009] Third, an elastic structure with excellent ventilation performance is provided, which prevents excessive compression of the seat cushion due to body weight, thereby enabling free air circulation and facilitating the dissipation of body heat.

[0010] Fourth, an elastic structure is provided that can achieve both weight distribution and weight support through limited deformation, thereby maintaining a correct sitting posture.

[0011] Fifth, an elastic structure is provided that reduces pressure on spinal discs, stimulates and relaxes muscles, improves blood circulation, and helps relieve fatigue through correct sitting posture.

[0012] The subject matter of the present invention is not limited to the subject matter mentioned above, and other technical subjects not mentioned will be clearly understood by those skilled in the art through the following description.

[0013] Technical solutions to technical issues

[0014] In order to solve the above-mentioned problems, an elastic structure according to one embodiment of the present invention includes: an outer column in the shape of a hexagonal column, with the upper and lower ends open to form sharp corners connecting the side surfaces; and an inner column arranged inside the outer column and connected to the inner circumferential surface of the outer column.

[0015] In addition, the elastic structure according to one embodiment of the present invention includes: a front elastic portion, formed at a position for placing the user's femur; and a rear elastic portion, arranged behind the front elastic portion, formed at a position for placing the user's ischium, the front elastic portion and the rear elastic portion include: an outer column, which is in the shape of a hexagonal column, with the upper and lower ends open to form sharp corners connecting the side surfaces; and an inner column, arranged inside the outer column and connected to the inner circumferential surface of the outer column.

[0016] Details of other embodiments will be included in the detailed description and accompanying drawings.

[0017] Effects of the Invention

[0018] The elastic structure and seat cushion according to the present invention have at least one or more of the following effects:

[0019] First, it is possible to provide an elastic structure that can maintain a correct sitting posture by preventing excessive compression while dispersing the pressure.

[0020] Second, an elastic structure having strong elasticity and excellent durability can be provided.

[0021] Third, it is possible to provide an elastic structure having excellent ventilation performance that allows for free air circulation and facilitates the dissipation of body heat by preventing the seat cushion from being excessively compressed due to body weight.

[0022] Fourth, an elastic structure can be provided that can achieve both weight distribution and weight support through limited deformation, thereby maintaining a correct sitting posture.

[0023] Fifth, a seat cushion can be provided that reduces pressure on spinal discs, stimulates and relaxes muscles, improves blood circulation, and helps relieve fatigue through correct sitting posture.

[0024] The effects of the present invention are not limited to the above-mentioned effects. Those skilled in the art will clearly understand other effects not mentioned above through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 FIG. 4 is an enlarged view of the surface of an elastic structure according to an embodiment of the present invention.

[0026] Figure 2 FIG. 4 is an enlarged view of the upper surface of the elastic structure according to one embodiment of the present invention.

[0027] Figure 3 for Figure 1 Sectional view 3-3.

[0028] Figure 4 for Figure 3 Enlarged view of point K in the middle.

[0029] Figure 5a FIG. 1 is a top view showing forces acting on an elastic structure according to an embodiment of the present invention.

[0030] Figure 5b FIG. 4 is a cross-sectional view showing forces acting on an elastic structure according to an embodiment of the present invention.

[0031] Figure 6a FIG. 1 is a top view illustrating the effect of an elastic structure according to an embodiment of the present invention.

[0032] Figure 6b Based on Figure 6a The cross-sectional view 9-9 illustrates the effect of the action.

[0033] Figure 7 For Figure 2 Other embodiments of the present invention are shown in the dotted hexagonal portion.

[0034] Figure 8 for Figure 7 Sectional view 8-8.

[0035] Figure 9 express Figure 7 The balance of forces when multiple elastic structures are combined.

[0036] Figure 10 For Figure 2 Other embodiments of the present invention are shown in the dotted hexagonal portion.

[0037] Figure 11 for Figure 10 Sectional view 11-11.

[0038] Figure 12 express Figure 10 The balance of forces when multiple elastic structures are combined.

[0039] Figure 13 For the general Figure 2 The dotted hexagonal part is separated to represent the top view.

[0040] Figure 14a for Figure 13 An embodiment of the cross-sectional view 14-14 is Figure 4 Further detailed diagram of .

[0041] Figure 14b for Figure 13 Other embodiments of the cross-sectional view 14-14.

[0042] Figure 14c for Figure 13 Another embodiment of the cross-sectional view 14-14.

[0043] Figure 15 For Figure 13 The balance of forces when multiple elastic structures are combined.

[0044] Figure 16 FIG. 4 is a perspective view of a seat cushion according to an embodiment of the present invention.

[0045] Figure 17 for Figure 16 Enlarged view of the S part in the middle.

[0046] Figure 18 To show from below Figure 16 Figure of the S part.

[0047] Figure 19 for Figure 17 Top view of part P in the middle.

[0048] Figure 20 This is a side view showing the degree of deformation at different positions when a user sits on the seat cushion. The top seat cushion represents the state before the user sits down, the seat cushion below it represents the deformed state when the user sits on the existing seat cushion, and the bottom seat cushion represents the deformed state when the user sits on the seat cushion of the present invention.

[0049] Figure 21 Indicates based on Figure 20 Pressure distribution on the seat cushion.

[0050] Figure 22a This is an example of an incorrect sitting posture. Figure 22b This is an example of correct sitting posture. DETAILED DESCRIPTION

[0051] The advantages, features and methods of achieving the same of the present invention are described in detail in the accompanying drawings. Figure 1 The embodiments described in detail will be clearly understood.

[0052] However, the present invention is not limited to the embodiments disclosed below and may be implemented in a variety of different forms. However, these embodiments are provided solely to fully disclose the present invention and enable those skilled in the art to fully understand the technical scope of the present invention. The present invention is defined solely by the scope of the claims. Throughout this specification, identical reference numerals denote identical components.

[0053] Hereinafter, the present invention will be described with reference to the accompanying drawings.

[0054] Figure 1 FIG. 4 is an enlarged view of the surface of an elastic structure according to an embodiment of the present invention. Figure 2 a is an enlarged view of the upper surface of the elastic structure according to one embodiment of the present invention. Figure 3 for Figure 1 Sectional view 3-3. Figure 4 for Figure 3 Enlarged view of point K in the middle.

[0055] Reference Figures 1 to 4 According to an embodiment of the present invention, the elastic structure includes: an inner cylinder 110, which is formed by a core portion 110a with a triangular vertical cross-section and a plurality of ribs 110b; and an outer cylinder 200, which is used to accommodate the inner cylinder 110, wherein the rib connecting surface 119 of the inner cylinder 110 is connected to the inner peripheral edge 210 of the outer cylinder 200.

[0056] The inner cylinder 110 is a combination of a core 110a and a plurality of ribs 110b. The core 110a and the plurality of ribs 110b may be formed as one piece. The outer cylinder 200 forms a cavity inside. The outer cylinder 200 accommodates the inner cylinder 110. The inner cylinder 110 and the outer cylinder 200 may be formed as one piece. The inner cylinder 110 and the outer cylinder 200 may be made of an elastic material such as silicone, memory foam, elastomer, or polyurethane. The upper and lower surfaces of the outer cylinder 200 are open structures for guiding air circulation.

[0057] In the following description, the corners 210 of the outer cylinder 200 refer to the corners formed on its side surfaces, which are formed in the vertical direction. The outer cylinder 200 can be a triangular prism, a square prism, a pentagonal prism, or a hexagonal prism. The corners 210 are formed on the inner circumference of the outer cylinder 200, and the inner cylinder 100 is in a form that is combined with the corners 210 on the inner circumference of the outer cylinder 200. Depending on the number of corners 210 of the outer cylinder 200, the number of the core portion 110a and the plurality of ribs 110b will also vary accordingly. The number of corners 210 of the outer cylinder 200 can be the same as the number of the core portion 110a and the plurality of ribs 110b.

[0058] The core 110a and the plurality of ribs 110b share an axis connecting the upper protrusion 115 and the lower protrusion 117. The core 110a and the plurality of ribs 110b form the upper protrusion 115 and the lower protrusion 117. The core 110a and the plurality of ribs 110b are combined to share the upper protrusion 115. The core 110a and the plurality of ribs 110b are combined to share the lower protrusion 117. The core 110a and the plurality of ribs 110b are combined to form an inner cylinder 100. The inner cylinder 100 has an upper protrusion 115 and a lower protrusion 117.

[0059] The protrusions formed on the core portion 110a can enhance the acupressure effect on soft tissues such as skin, fascia, and muscles.

[0060] The core portion 110a and the plurality of ribs 110b are arranged at equal angles with respect to the axis, and the core portion 110a and the plurality of ribs 110b are arranged at a 60-degree angle relative to each other. The size of this angle may vary depending on the number of core portions 110a and the plurality of ribs 110b. The angle refers to the angle between the core portion 110a and the plurality of ribs 110b. The angle refers to the included angle between adjacent core portions 110a and the plurality of ribs 110b formed with respect to the central axis. The included angle refers to the angle formed between two straight lines when they intersect.

[0061] A shrinkage-allowing groove 100a is formed between the core 110a and the plurality of ribs 110b to allow deformation caused by the vertical load of the core 110a and the plurality of ribs 110b. The protrusion 115 at the upper end and the protrusion 117 at the lower end are the parts that come into contact with the ground or the body and will undergo elastic deformation. Since the protrusion 115 at the upper end and the protrusion 117 at the lower end will move closer to each other and bend, space for deformation needs to be reserved. The shrinkage-allowing groove 100a is a hole for air circulation. Due to the elastic deformation of the protrusion 115 at the upper end, the protrusion 117 at the lower end and the outer column 200, the space is repeatedly contracted and relaxed, causing changes in air pressure. The air circulates through the changes in air pressure and discharges body heat to the outside.

[0062] The height of the protrusion 115 at the upper end connecting the core 110a and the plurality of ribs 110b, and the protrusion 117 at the lower end connecting the core 110a and the plurality of ribs 110b, do not exceed the height of the outer cylinder 200. If the upper protrusion 115 or the lower protrusion 117 were to protrude, it would generate excessive friction and finger pressure. Therefore, to achieve an optimal balance between friction and finger pressure, the height of the upper protrusion 115 and the lower protrusion 117 are selected. The height of the upper protrusion 115 and the lower protrusion 117 are determined relative to the height of the outer cylinder 200.

[0063] According to one embodiment of the present invention, the elastic structure includes: an inner cylinder 100, which is in the shape of a hexagonal cone and has a so-called cavity shrinkage-allowing groove 100a formed between each corner 210; and an outer cylinder 200, which is in the shape of a hexagonal cylinder and accommodates the inner cylinder 100, and the inner circumference is connected to the rib connection surface 119 of the inner cylinder 100.

[0064] The inner column 100 is triangular in shape, and is formed by combining a core portion 110 a with a protrusion 115 at the upper end and a protrusion 117 at the lower end coaxially with a plurality of ribs 110 b.

[0065] Figure 5a FIG. 1 is a top view showing forces acting on an elastic structure according to an embodiment of the present invention. Figure 5b FIG5 is a cross-sectional view showing forces acting on an elastic structure according to an embodiment of the present invention. FIG5 c is a cross-sectional view showing forces acting on an elastic structure according to another embodiment of the present invention.

[0066] Reference Figure 5a 、 Figure 5b 5c, the effects of the elastic structure according to the present invention are as follows.

[0067] When a user applies weight by lying down or sitting on the elastic structure, their weight acts on the upper protrusion 115 and the upper surface of the outer column 200. The weight applied to the upper protrusion 115 is distributed to the core 110a and the plurality of ribs 110b, and then transmitted to the inner corners 210 of the outer column 200.

[0068] The protrusion 117 at the lower end and the lower surface of the outer column 200 bear the upward force. The outer column 200, the core 110a and the plurality of ribs 110b are elastically deformed to maintain balance through action and reaction.

[0069] The elastic structure according to the present invention is composed of a combination of triangular structures. The outer column 200 and the inner column 100 form a truss structure. Therefore, compared with traditional vertical and horizontal structures, it is more stable geometrically. In other words, although the structure according to the present invention will produce elastic deformation due to the use of elastic materials, the deformation of the shape is minimized due to its structural characteristics. Limited deformation helps to maintain human posture. Limited deformation also increases the reaction force that relaxes the user's muscles. The truss structure prevents excessive deformation (bending) in a single direction, thereby relaxing the muscles evenly. By suppressing excessive deformation, the truss structure helps to maintain the user's posture.

[0070] Furthermore, the elastic structure minimizes bending, thereby improving durability. The truss structure maintains a predetermined shrinkage-allowing hole size, thereby uniformly maintaining ventilation function.

[0071] Figure 6a FIG. 1 is a top view illustrating the effect of an elastic structure according to an embodiment of the present invention. Figure 6b for Figure 6a Sectional view 9-9.

[0072] Reference Figure 6a and Figure 6b According to an embodiment of the present invention, the elastic structure enables air circulation through the shrinkage-permitting hole 100a. The shrinkage-permitting hole 100a not only allows the deformation of the inner cylinder 100 but also serves as a space for air circulation. In addition, a chamber s is formed between the inner cylinder 100 and the three-dimensional cylinder 200.

[0073] When a load is applied to the inner column 100 and the three-dimensional column 200, deformation occurs, which changes the shape of the chamber s. The deformation of the chamber s causes an air pressure difference, which induces air circulation.

[0074] Figure 7 For Figure 2 Another embodiment of the present invention is shown in the dotted hexagonal portion. Figure 8 for Figure 7 Sectional view 8-8.

[0075] Reference Figure 7 and Figure 8 According to an embodiment of the present invention, the elastic structure includes: an outer cylinder 200, which is in the shape of a hexagonal cylinder, with open upper and lower ends, and formed with corners 210 connecting side surfaces 220; and an inner cylinder 100, which is arranged inside the outer cylinder 200 and connected to the inner circumference of the outer cylinder 200, and the inner cylinder 100 includes: a circular core portion 110a-1, which is cylindrical, and the upper and lower ends are flat; and a plurality of square ribs 110b-1, connecting the outer circumference of the circular core portion 110a-1 and the inner circumference of the outer cylinder 200, and the circular core portion 110a-1, the square ribs 110b-1 and the outer cylinder 200 have the same height.

[0076] The square rib 110b-1 is rectangular, connecting the upper end of the circular core 110a-1 and the upper end of the outer column 200, and the lower end of the circular core 110a-1 and the lower end of the outer column 200. The square rib 110b-1 is connected to the corner 210 of the outer column 200, and its upper and lower ends are flat.

[0077] Figure 9 express Figure 7 The balance of forces when multiple elastic structures are combined.

[0078] Reference Figure 9 , and refer again Figure 8Since the inner column 110 and the outer column 200 are at the same height, the load applied from above is evenly distributed to the ground (below). Therefore, deformation due to vertical load is suppressed. In addition, even if a load is applied from the side, since the force balance is maintained with other elastic structures connected, deformation due to shear force is suppressed. Therefore, although deformation may occur due to the elasticity of the material itself and ventilation is allowed through shrinkage allowing hole 100a, the deformation is relatively minimized.

[0079] Figure 10 For Figure 2 Another embodiment of the present invention is shown in the dotted hexagonal portion. Figure 11 for Figure 10 Sectional view 11-11.

[0080] Reference Figure 10 and Figure 11 According to another embodiment of the present invention, an elastic structure includes: an outer column 200 in the shape of a hexagonal column, open at its upper and lower ends, and having corners 210 connecting side surfaces 220; and an inner column 110 disposed within and connected to the outer column 200. The inner column 110 includes: a protruding core 110a-2 in a cylindrical shape with a protrusion formed on at least one of its upper and lower ends; and a plurality of inclined ribs 110b-2, at least one of whose upper and lower ends is inclined. The inclined ribs 110b-2 connect the outer circumference of the protruding core 110a-2 to the side surfaces 220 of the outer column 200. The inclined ribs 110b-2 are connected to the side surfaces 220 of the outer column 200. The load applied to the inclined ribs 110b-2 acts on the side surfaces 220 of the outer column 200.

[0081] Figure 12 express Figure 10 The elastic structure is combined into multiple states of force balance.

[0082] Reference Figure 12 ,and Figure 9 and the following Figure 13 compared to, Figure 10 In the embodiment, when a load is applied to the inner column 110, the load is distributed to the corners 210 of the outer column 200 and the side surfaces 220 of the outer column 200. Therefore, the problem of the load transferred from the core being concentrated on the corners 210 of the outer column 200 can be alleviated. This load distribution helps improve the durability of the outer column 200 and the ribs. Therefore, when multiple such elastic structures are formed and connected, the forces between the structures are balanced, thereby maintaining the shape to the greatest extent possible.

[0083] Figure 13 For the general Figure 2 The dotted hexagonal part is separated to represent the top view. Figure 14a for Figure 13 An embodiment of the cross-sectional view 14-14 is Figure 4 Further detailed diagram of . Figure 14b for Figure 13 Other embodiments of the cross-sectional view 14-14. Figure 14c for Figure 13 Another embodiment of the cross-sectional view 14-14.

[0084] Reference Figure 13 、 Figure 14a 、 Figure 14b ,and Figure 14c According to another embodiment of the present invention, the elastic structure includes: an outer column 200, which is in the shape of a hexagonal column, with open upper and lower ends, and formed with corners 210 connecting the side surfaces 220; and an inner column 110, which is arranged inside the outer column 200 and connected to the outer column 200, and the inner column 110 includes: a protruding core portion 110a-3, 110a-4, 110a-5, which is cylindrical and has a protrusion formed on at least one of the upper and lower ends; and a plurality of inclined ribs 110b-3, 110b-4, 110b-5, at least one of the upper and lower ends is in an inclined shape.

[0085] according to Figure 14a In the embodiment, the upper protrusion 115 at the upper end and the lower protrusion 117 at the lower end of the protrusion-type core portion 110a-3 have the same height as the outer column 200. The protrusions are used to stimulate and relax muscles.

[0086] according to Figure 14b In an embodiment, an upper protrusion 116 is formed at the upper end of the protruding core portion 110a-4, and a lower protrusion 117 is formed at the lower portion of the protruding core portion 110a-4. The lower protrusion 117 is at the same height as the lower end of the outer column 200, while the upper protrusion 116 is higher than the upper end of the outer column 200. The upper protrusion 116 is exposed on the upper side of the outer column 200. At least one of the upper and lower ends of the protruding core portion 110a-4 can be formed to protrude higher than the outer column 200. The protruding core portion 110a-4 that protrudes upward above the outer column 200 has a higher stimulating effect on the muscles. In addition, the seat cushion 10 can be turned over for use, with the protruding protruding core portion 110a-4 facing the ground. In this case, the friction with the ground is increased. Thus, unnecessary movement of the seat cushion 10 caused by body movements is suppressed.

[0087] according to Figure 14cIn the embodiment, an upper protrusion 115 is formed at the upper end of the protruding core portion 110a-5. The lower end 118 of the protruding core portion 110a-5 is a flat surface without any protrusion. The lower end 118 of the protruding core portion 110a-5 is the same height as the outer column 200, so that it does not protrude from the outer column 200. The upper protrusion 115 at the upper end of the protruding core portion 110a-5 is the same height as the outer column 200. Since the lower end 118 is a cross-sectional flat surface, the contact area with the ground is maximized, thereby distributing the load and suppressing deformation of the lower side of the seat cushion 10.

[0088] Figure 15 for Figure 13 The elastic structure is combined into multiple states of force balance.

[0089] Reference Figure 15 The outer column 200 and the inner column 110 form a truss structure, distributing the loads applied to the outer column 200 and the inner column 110 while maintaining a force balance. Therefore, when multiple elastic structures of this type are formed and connected, the elastic structures balance the forces with each other, thereby maintaining the shape with maximum stability despite deformation caused by external forces.

[0090] For the vertical force, please refer to Figure 5b The description will be understood, therefore, it is omitted here.

[0091] Figure 16 FIG. 1 is a perspective view of a seat cushion 10 according to an embodiment of the present invention. Figure 17 for Figure 16 Enlarged view of the S part in the middle. Figure 18 To show from the bottom Figure 16 Figure of the S part. Figure 19 for Figure 17 Top view of part P in the figure.

[0092] Reference Figure 16 、 Figure 17 、 Figure 18 and Figure 19According to an embodiment of the present invention, the seat cushion 10 includes: a front elastic portion 20 formed at a position for placing the user's femur; and a rear elastic portion 30, arranged behind the front elastic portion 20, formed at a position for placing the user's ischium, the front elastic portion 20 and the rear elastic portion 30 including: an outer column 200 in the shape of a hexagonal column, with the upper and lower ends open to form an edge 210 connecting the side 220; and an inner column 110 arranged at the outer column The inner cylinder 110 of the front elastic portion 20 is located inside the body 200 and is connected to the inner circumference of the outer cylinder 200. The inner cylinder 110 includes: a circular core portion 110a-1, which is cylindrical in shape and has flat upper and lower ends; and a plurality of square ribs 110b-1, which are used to connect the outer circumference of the circular core portion 110a-1 with the inner circumference of the outer cylinder 200. The circular core portion 110a-1, the square ribs 110b-1 and the outer cylinder 200 have the same height.

[0093] The square rib 110b-1 is formed into a rectangle, and is used to connect the upper end of the circular core 110a-1 with the upper end of the outer column 200 and the lower end of the circular core 110a-1 with the lower end of the outer column 200. The square rib 110b-1 is connected to the corner 210 of the outer column 200, and the upper and lower ends are flat.

[0094] The inner cylinder 110 of the rear elastic portion 30 includes: a protruding core portion 110a-2, 110a-3, 110a-4, 110a-5, which is cylindrical and has a protrusion formed at at least one of the upper end and the lower end; and a plurality of inclined ribs 110b-2, 110b-3, 110b-4, 110b-5, at least one of the upper end and the lower end is inclined.

[0095] The seat cushion 10 according to one embodiment of the present invention comprises: a front elastic portion 20 formed at a position for placing the user's femur; and a rear elastic portion 30, arranged behind the front elastic portion 20, formed at a position for placing the user's ischium, the front elastic portion 20 and the rear elastic portion 30 comprising: an outer column 200 in the shape of a hexagonal column, with the upper and lower ends open to form an edge 210 connecting the side 220; and an inner column 110 arranged at the outer The interior of the column 200 is connected to the inner circumferential surface of the outer column 200. The inner column 110 of the rear elastic part 30 includes: a protruding core part 110a-2, 110a-3, 110a-4, 110a-5, which is cylindrical and has a protrusion formed at at least one of the upper end and the lower end; and a plurality of inclined ribs 110b-2, 110b-3, 110b-4, 110b-5, at least one of the upper end and the lower end is in an inclined shape.

[0096] The inclined ribs 110 b - 2 are used to connect the outer circumference of the protruding core portion 110 a - 2 and the side surface 220 of the outer column 200 .

[0097] Figure 21 The figure shows the deformation degree of each part when the user sits on the seat cushion 10. The uppermost seat cushion 10 in the figure shows the state S1 before the user sits down, the seat cushion 10 below it shows the deformed state S2 when the user sits on the conventional seat cushion, and the lowermost seat cushion 10 shows the deformed state S3 when the user sits on the seat cushion 10 of the present invention.

[0098] Figure 21 Indicates based on Figure 20 The pressure distribution acting on the seat cushion 10.

[0099] Reference Figure 21 As shown in Figure 22 , the shape S2 is explained as follows: The ischium is the part of the bone that contacts the chair when sitting. Because the ischium protrudes downward, the load is concentrated around the ischium X, resulting in the greatest deformation of the seat cushion 10. Therefore, the area around the ischium X is the most compressed part of the seat cushion 10. The buttocks behind the ischium are gently curved, so the corresponding area Y is also curved.

[0100] Furthermore, when the body leans forward, the corresponding position Y moves away from the center of gravity, thus reducing the load on the seat bones. Consequently, the amount of compression at the rear portion Y of the ischial spine is reduced. However, the front portion Z of the seat cushion 10 bears an excessive load when the body leans forward. Therefore, the further the body leans forward, the more the front portion Z of the seat cushion 10 is compressed. As a result, the seat cushion 10 gradually lowers from the rear to the front, causing the body to gradually slide toward the front of the chair, ultimately leading to an unfavorable sitting posture where the user's buttocks hang over the front of the chair.

[0101] Regarding the S3 shape, according to the present invention, the front elastic portion 20 and the rear elastic portion 30 are formed from elastic structures having different structures. The front elastic portion 20 utilizes a circular core 110a-1 and a plurality of square ribs 110b-1. Compared to the rear elastic portion 30, its protrusions have superior load-bearing capacity, resulting in less deformation.

[0102] Furthermore, while the rear elastic portion 30 may experience greater deformation than the front elastic portion 20, the truss structure results in a relatively low level of deformation. Furthermore, the inner column 110 has a protrusion formed on its upper side. This structure reduces compression at the front of the seat cushion 10 while increasing compression at the rear. This prevents the lower body from sliding forward.

[0103] The preferred embodiments of the present invention are illustrated above, but the present invention is not limited to the above-mentioned specific embodiments. Ordinary technicians in this field can make various modifications and variations without departing from the spirit of the present invention as requested by the claims of the present invention. Moreover, these modified implementations should not be understood separately from the technical ideas or prospects of the present invention.

Claims

1. An elastic structure, wherein: include: The outer column is in the shape of a hexagonal column, with the upper and lower ends open to form corners connecting the side surfaces; as well as The inner cylinder is arranged inside the outer cylinder and connected to the inner circumference of the outer cylinder.

2. The elastic structure according to claim 1, wherein The inner cylinder comprises: a circular core portion having a cylindrical shape and planar upper and lower ends; and A plurality of square ribs are used to connect the outer circumference of the circular core portion and the inner circumference of the outer cylinder. The circular core, the square ribs and the outer column have the same height.

3. The elastic structure according to claim 1, wherein The square ribs are formed into a rectangle and are used to connect the upper end of the circular core and the upper end of the outer cylinder, as well as the lower end of the circular core and the lower end of the outer cylinder. The square ribs are connected to the corners of the outer column, and the upper and lower ends are flat.

4. The elastic structure according to claim 1, wherein The inner cylinder comprises: a protrusion-type core portion having a cylindrical shape and having a protrusion formed on at least one of an upper end and a lower end; and The plurality of inclined ribs have at least one inclined upper end and a lower end.

5. The elastic structure according to claim 4, wherein: The inclined ribs connect the outer peripheral surface of the protruding core portion and the side surface of the outer column. In the protruding core portion, at least one of the upper end and the lower end has the same height as the outer column.

6. The elastic structure according to claim 4, wherein: In the protruding core part, at least one of the upper end and the lower end is formed to protrude higher than the outer column, and the other of the upper end and the lower end has the same height as the outer column and is a flat surface.

7. A seat cushion, wherein: include: a front elastic portion formed at a position for placing a user's femur; as well as The rear elastic portion is arranged behind the front elastic portion and is formed at a position for placing the user's ischial bones. The front elastic portion and the rear elastic portion include: The outer column is in the shape of a hexagonal column, with the upper and lower ends open to form corners connecting the side surfaces; as well as The inner cylinder is arranged inside the outer cylinder and connected to the inner circumference of the outer cylinder.

8. The seat cushion according to claim 7, wherein: The inner cylinder of the front elastic portion includes: a circular core portion having a cylindrical shape and planar upper and lower ends; and A plurality of square ribs are used to connect the outer circumference of the circular core portion and the inner circumference of the outer cylinder. The circular core, the square ribs and the outer column have the same height.

9. The seat cushion according to claim 8, wherein: The square ribs are formed into a rectangle and are used to connect the upper end of the circular core part and the upper end of the outer cylinder, as well as the lower end of the circular core part and the lower end of the outer cylinder. The square ribs are connected to the corners of the outer column, and the upper and lower ends are flat.

10. The seat cushion according to claim 7, wherein The inner column of the rear elastic portion includes: a protrusion-type core portion having a cylindrical shape and having a protrusion formed on at least one of an upper end and a lower end; and The plurality of inclined ribs have at least one inclined upper end and a lower end.

11. The seat cushion according to claim 7, wherein: The inner column of the rear elastic portion includes: a protrusion-type core portion having a cylindrical shape and having a protrusion formed on at least one of an upper end and a lower end; and The plurality of inclined ribs have at least one inclined upper end and a lower end.

12. The seat cushion according to claim 11, wherein The inclined ribs are used to connect the outer peripheral surface of the protruding core portion and the side surface of the outer column.

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