Cushion, preparation method thereof and chair

Abstract

The cushion comprises an outer frame, an elastic layer, an elastic connecting piece and a plurality of rebounding blocks, a mounting groove is formed in the outer frame, and the elastic layer is arranged in the mounting groove; the plurality of springback blocks are arranged in sequence and are connected with one another through the elastic connecting pieces to form a springback block group; one end of the rebound block group is embedded into the mounting groove and is arranged on the upper surface of the elastic layer; the springback block descends to different depths of the elastic layer under the action of pressure; and when the pressure is eliminated, the rebound block restores to the upper surface of the elastic layer under the action of the elastic connecting piece. The invention also discloses a chair comprising the cushion and a preparation method of the cushion. The seat cushion has the advantages that the seat cushion can be attached to the buttocks of the human body, the contact area between the buttocks and the seat cushion is enlarged, the pressure of the seat cushion on the buttocks is reduced, and meanwhile the good heat dissipation effect is achieved.

Description

Technical Field

[0001] The present invention relates to the field of furniture, and particularly to a seat cushion, a preparation method thereof, and a chair. Background Art

[0002] Modern people increasingly pay attention to improving the quality of life, especially office furniture. As people's working hours continue to increase, in addition to practical performance, there are more requirements for office furniture in terms of environmental protection, antibacterial, health, etc. However, most office chairs on the market at present do not conform to the ergonomic principle. They simply provide seats for people without considering how to reduce the fatigue generated by the human body during long-term work, thereby improving the comfort of office work and thus increasing work efficiency.

[0003] When a user sits on a traditional office chair, the hard seat cushion on the office chair does not conform to the shape of the user's buttocks, and the contact area between the user's buttocks and the hard seat cushion is small, resulting in a large pressure exerted by the hard seat cushion on the user's buttocks. Moreover, the heat dissipation effect of the traditional soft-packed seat cushion is poor. Therefore, both the hard seat cushion and the soft-packed seat cushion are difficult to bring a good user experience to the user, and improvements need to be made. Summary of the Invention

[0004] The purpose of the present invention is to provide a seat cushion that is adapted to the user's buttocks to reduce the pressure on the buttocks and has a good heat dissipation effect, a preparation method of the seat cushion, and a chair.

[0005] The present invention provides a seat cushion, which includes an outer frame, an elastic layer, elastic connectors, and a plurality of resilient blocks. An installation groove is formed inside the outer frame, and the elastic layer is arranged in the installation groove; The plurality of resilient blocks are arranged in sequence and are connected to each other through elastic connectors to form a resilient block group; One end of the resilient block group is embedded in the installation groove and is arranged on the upper surface of the elastic layer; when the resilient block is subjected to pressure, it descends to different depths of the elastic layer; when the pressure is eliminated, the resilient block returns to the upper surface of the elastic layer under the action of the elastic connector.

[0006] Preferably, the resilient blocks are arranged in sequence along the horizontal and vertical directions. Independent horizontal through holes and vertical through holes are formed on the resilient blocks. The horizontal through holes penetrate through the resilient blocks horizontally, and the vertical through holes penetrate through the resilient blocks vertically. The horizontal through holes and the vertical through holes are arranged in a staggered manner along the height direction of the resilient blocks; The elastic connectors include a first elastic connector and a second elastic connector. The first elastic connector is inserted into the horizontal through holes of the resilient blocks to connect the resilient blocks in series into several rows; the second elastic connector is inserted into the vertical through holes of the resilient blocks to connect the resilient blocks in series into several columns; Both ends of the first elastic connecting member and the second elastic connecting member are respectively fixed to the rebound blocks close to the inner side wall of the outer frame or to the inner side wall of the outer frame.

[0007] Preferably, the rebound block includes a mounting portion and a abutting portion. The abutting portion is located above the mounting portion. The transverse through hole and the longitudinal through hole are located on the mounting portion. The abutting portion is trapezoidal, and a V-shaped groove is formed between the abutting portions of two adjacent rebound blocks.

[0008] Preferably, through grooves are formed on the side surfaces of the two rebound blocks that abut against each other, and the through grooves communicate with the transverse through hole or the longitudinal through hole. Preferably, the rebound blocks include edge rebound blocks distributed along the inner peripheral side of the outer frame. A limiting block is formed at the top end of the outer frame. A limiting portion is formed on one side of the edge rebound block, and the limiting portion is located below the limiting block.

[0009] Preferably, the transverse through hole and the longitudinal through hole penetrate through the limiting portion. A transition groove and a receiving groove are further formed at the limiting portion of the edge rebound block. One end of the transition groove communicates with the receiving groove, and the other end of the transition groove communicates with the transverse through hole or the longitudinal through hole; the elastic connecting member is an elastic rope, and a knot is provided at the end of the elastic rope; one end of the elastic rope passes through the transition groove and the knot is clamped in the receiving groove.

[0010] Preferably, the edge rebound blocks include end rebound blocks arranged at the end corners. Two transverse through holes and two longitudinal through holes are formed on the end rebound blocks. The two transverse through holes or the two longitudinal through holes are arranged along the height direction of the rebound block, so that the rebound blocks located at the end corners of the outer frame can be used interchangeably.

[0011] Preferably, the elastic layer is composed of one or more of sponge material, air fiber material and polyurethane material.

[0012] Preferably, the elastic layer sequentially includes a first sponge layer, a second sponge layer and an air fiber layer from top to bottom, and the densities of the first sponge layer, the second sponge layer and the air fiber layer are all different.

[0013] The present invention also discloses a chair, which includes a seat cushion and also includes a base, and the seat cushion is fixedly arranged on the base.

[0014] Preferably, the chair further includes a backrest assembly, which includes a backrest frame and a backrest board. The backrest frame is fixedly installed at the bottom of the outer frame, and the backrest board is hinged to the backrest frame. The included angle between the backrest board and the seat cushion is A, and 90° < A < 130°. The base includes a seat frame, a lifting cylinder, and a plurality of rollers. The plurality of rollers are arranged at the bottom end of the seat frame, the lifting cylinder is fixedly arranged on the seat frame, and the seat cushion is installed on the lifting cylinder to drive the seat cushion to lift. Further, the present invention also discloses a preparation method for the above-mentioned seat cushion, including the following steps: S1. Arrange the resilient blocks in sequence along the horizontal and vertical directions in the same plane, and connect them to each other through elastic connectors to form a resilient block group; S2. The lower end of the outer frame is open, an installation groove is formed inside the outer frame, and a limiting block is formed at the top of the outer frame. The resilient blocks include edge resilient blocks distributed along the inner peripheral side of the outer frame, and a limiting portion is arranged on the outer side of the edge resilient blocks; install the resilient block group upward from the lower end of the outer frame until the edge limiting portion contacts the limiting block of the outer frame; S3. Install the elastic layer upward from the lower end of the outer frame to the lower surface position of the resilient block group; S4. Package a bottom plate on the lower surface of the resilient block group to fix the bottom plate on the outer frame.

[0015] Preferably, in step S1, the resilient blocks are arranged in a rectangle with N groups in the horizontal direction and M groups in the vertical direction in the same plane; The elastic connectors are elastic ropes, and the elastic ropes include N first elastic ropes and M second elastic ropes. Each first elastic rope passes through a group of horizontally arranged resilient blocks, and each second elastic rope passes through a group of vertically arranged resilient blocks, and both ends of the first elastic rope and the second elastic rope are limited on the edge resilient blocks; the first elastic rope and the second elastic rope are arranged alternately in the height direction.

[0016] From the above description of the present invention, the present invention has the following beneficial effects: 1. The seat cushion of the present invention includes a resilient block group, which is formed by connecting a plurality of independent resilient blocks. Each resilient block supports independent resilience, and an elastic layer is arranged at the bottom, which can reduce the pressure of the seat cushion on the buttocks and has a good heat dissipation effect at the same time.

[0017] 2. The elastic layer consists of a first sponge layer, a second sponge layer, and an air fiber layer with different densities; the multi-layer structure has different densities and different hardnesses, making the sinking depth of the elastic layer more reasonable and the force dispersion more uniform.

[0018] 3. The buttocks-supporting parts of the resilient blocks are arranged in a trapezoidal shape, so that a V-shaped groove is formed between the buttocks-supporting parts of two adjacent resilient blocks, increasing air circulation and making the seat cushion have a good heat dissipation effect, not stuffy and not airtight.

[0019] 4. The side surfaces of the resilient blocks that face each other and abut are each provided with a through groove, such that the elastic connecting member has a movable space within the through groove. When the resilient blocks are bent or lowered under pressure, the elastic connecting member has sufficient space for elastic expansion and contraction, facilitating the elastic deformation of the seat cushion. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of the overall structure of a chair according to an embodiment; Figure 2 is a front view of the base and backrest assembly according to an embodiment; Figure 3 is a state diagram of a chair according to an embodiment during use; Figure 4 is an exploded schematic diagram of the seat cushion according to an embodiment; Figure 5 is a schematic diagram of the first elastic connecting member penetrating into the transverse through hole according to an embodiment; Figure 6 is a schematic diagram of the second elastic connecting member penetrating into the longitudinal through hole according to an embodiment; Figure 7 is a schematic diagram of the outer frame according to an embodiment; Figure 8 is a cross-sectional view of the resilient block not distributed along the inner side wall of the outer frame according to an embodiment; Figure 9 is a front view of a chair according to an embodiment; Figure 10 is an embodiment Figure 9 partial enlarged view at B in; Figure 11 is an embodiment Figure 3 partial enlarged view at A in; Figure 12 is a partial cross-sectional view of the resilient block and the outer frame according to an embodiment; Figure 13 is a schematic diagram of the resilient block not distributed along the inner side wall of the outer frame according to an embodiment; Figure 14 is a schematic diagram of the edge resilient block according to an embodiment; Figure 15 is a schematic diagram of the end resilient block according to an embodiment; Figure 16 is a cross-sectional view of the seat cushion according to an embodiment.

[0021] Reference numerals: 1, base; 11, seat frame; 12, lifting cylinder; 13, roller; 2, backrest assembly; 21, backrest frame; 22, backrest board; 3, seat cushion; 31, outer frame; 311, installation groove; 313, limiting block; 314, frame body; 315, bottom plate; 32, elastic layer; 321, air fiber layer; 322, second sponge layer; 323, first sponge layer; 33, rebounding block; 331, abutting seat portion; 332, installation portion; 333, limiting portion; 334, transverse through hole; 335, elastic connecting piece; 3351, knot; 3352, first elastic connecting piece; 3353, second elastic connecting piece; 336, V-shaped groove; 337, transition groove; 338, accommodating groove; 339, longitudinal through hole; 4, through groove; 5, rebounding block group. Detailed implementation manners

[0022] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer and more understandable, the following further describes the present invention in detail with reference to the Figures 1 - 16 accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0023] Referring to Figure 1 , Figure 2 and Figure 3 , a chair includes a base 1, a backrest assembly 2 and a seat cushion 3. The base 1 includes a seat frame 11, a lifting cylinder 12 and a plurality of rollers 13. The plurality of rollers 13 are uniformly arranged at the bottom end of the seat frame 11. The lifting cylinder 12 is fixedly arranged on the seat frame 11, and the seat cushion 3 is fixedly installed on the telescopic rod of the lifting cylinder 12. The seat cushion 3 is lifted and adjusted by the drive of the lifting cylinder 12, so that the seat cushion 3 is at a suitable position height. The backrest assembly 2 includes a backrest frame 21 and a backrest board 22. The vertical section of the backrest frame 21 is in an "L" shape. The backrest frame 21 is fixedly installed between the bottom end of the seat cushion 3. The backrest board 22 is hinged and fixed to the backrest frame 21, so as to facilitate the angle adjustment of the backrest board 22. The included angle between the backrest board 22 and the seat cushion 3 is set to be "A", and the included angle between the backrest board 22 and the seat cushion 3 satisfies 90 degrees < A < 130 degrees. The backrest board 22 is kept at a suitable inclination angle, so that the backrest board 22 can adapt to and fit the human back, so as to achieve a good sitting and leaning experience.

[0024] Referring to Figures 4 - 11, the seat cushion 3 includes an outer frame 31, an elastic layer 32, and a plurality of resilient blocks 33. An installation groove 311 is formed in the outer frame 31, and the elastic layer 32 is installed in the installation groove 311. The elastic layer 32 includes an air fiber layer 321, a second sponge layer 322, and a first sponge layer 323 from bottom to top. A plurality of resilient blocks 33 are distributed on the first sponge layer 323. The resilient block 33 includes a buttocks contact portion 331 and an installation portion 332 from top to bottom. The installation portions 332 of the plurality of resilient blocks 33 are embedded in the installation groove 311 of the outer frame 31, so that the plurality of resilient blocks 33 are distributed on the surface of the first sponge layer 323.

[0025] On the side surface of the installation portion 332 of each resilient block 33, independent transverse through holes 334 and longitudinal through holes 339 are provided. The transverse through holes 334 penetrate the resilient block 33 horizontally, and the longitudinal through holes 339 penetrate the resilient block 33 vertically. The transverse through holes 334 and the longitudinal through holes 339 are in a cross shape and do not interfere with each other. The resilient blocks 33 are connected in series with each other through elastic connectors 335 to form a resilient block group 5. The elastic connectors 335 are further divided into first elastic connectors 3352 and second elastic connectors 3353. The resilient blocks 33 are arranged in several rows, and the transverse through holes 334 of the resilient blocks 33 in the same row correspond to each other. The first elastic connectors 3352 are inserted into the transverse through holes 334 of the resilient blocks 33 in the same row to connect the resilient blocks 33 in the same row in series. The resilient blocks 33 connected in series in several rows are arranged so that the two ends of the resilient blocks 33 in each row are flush with each other, and the longitudinal through holes 339 of the resilient blocks 33 in each row correspond to each other. The second elastic connectors 3353 are inserted into the longitudinal through holes 339 of the resilient blocks 33 in each row to connect the resilient blocks 33 in series to form a resilient block group 5. After the elastic connectors 335 connect the plurality of resilient blocks 33 in series, the two ends of the elastic connectors 335 are fixed to the resilient blocks 33 close to the inner side wall of the outer frame 31. The elastic connectors 335 can be elastic connection materials such as elastic ropes or springs.

[0026] Refer to Figure 11 and Figure 12 , when the user sits on the seat cushion 3, each resilient block 33 will receive different pressure values, and each resilient block 33 will descend by different depths according to different pressure values. Each resilient block 33 fits with the human buttocks, so as to expand the contact area between the seat cushion 3 and the human buttocks and disperse the pressure of the seat cushion 3 on the human buttocks. Since the densities and hardnesses of the air fiber layer 321, the second sponge layer 322, and the first sponge layer 323 are different, when the human body sits on the seat cushion 3, the sinking depth of the elastic layer 32 is more reasonable and the force dispersion is more uniform. When the human buttocks leave the seat cushion 3, each resilient block 33 rises to its original state under the action of the elastic connector 335, and the top surfaces of the resilient blocks 33 are kept on the same horizontal plane.

[0027] Refer to Figures 4 - 16, in order to keep each elastic block 33 stable in the installation groove 311 of the outer frame 31, a limiting block 313 is formed at the top end of the outer frame 31. The limiting block 313 is annular. Correspondingly, the elastic blocks 33 distributed along the inner side wall of the outer frame 31 are set as edge elastic blocks (as shown in Figure 14 ). A limiting part 333 is formed on the side of the edge elastic block close to the inner side wall of the outer frame 31. The limiting part 333 is located on one surface of the abutting part 331 of the elastic block 33 and does not distribute along the inner side wall of the outer frame 31. The elastic block 33 (as shown in Figure 13 ) is not provided with a limiting part 333 on one side. The outer frame 31 is set to be composed of a frame body 314 and a bottom plate 315. When installing each elastic block 33, the elastic block group 5 is installed into the frame body 314, so that the limiting part 333 on one side of the edge elastic block is embedded into the bottom end of the limiting block 313. The edge elastic block is limited by the limiting block 313 at the top end of the outer frame 31. At the same time, the elastic connecting piece 335 limits between the elastic blocks 33 to prevent the elastic block 33 with one end embedded in the installation groove 311 from falling out of the installation groove 311. Then, the elastic layer 32 is installed into the frame body 314, so that the upper surface of the elastic layer 32 abuts against the bottom end of the elastic block group 5. Finally, the bottom plate 315 and the frame body 314 are locked and fixed.

[0028] In order to further improve the installation efficiency of the elastic block 33, the four elastic blocks 33 located at the end corners of the outer frame 31 are set as end elastic blocks (as shown in Figure 15 ). Two transverse through holes 334 and two longitudinal through holes 339 are formed on the side surface of the end elastic block. The two transverse through holes 334 or the two longitudinal through holes 339 are arranged along the height direction of the end elastic block. When installing the four end elastic blocks located at the inner end corners of the outer frame 31, the limiting part 333 on the side surface of the end elastic block is placed at the bottom end of the limiting block 313. Thus, when two transverse through holes 334 and two longitudinal through holes 339 are formed on the side surfaces of the four end elastic blocks at the end corners of the outer frame 31, the four end elastic blocks at the end corners of the outer frame 31 can be replaced and used with each other.

[0029] After connecting each of the resilient blocks 33 in series through the elastic connecting member 335, in order to prevent the elastic connecting member 335 from falling off from the transverse through-hole 334 or the longitudinal through-hole 339 of the resilient block 33, a transition groove 337 and a receiving groove 338 are formed on the surface of the limiting portion 333 of the resilient block 33. One end of the transition groove 337 communicates with the receiving groove 338, and the other end of the transition groove 337 communicates with the transverse through-hole 334 or the longitudinal through-hole 339. Both ends of the elastic connecting member 335 pass through the transverse through-hole 334 or the longitudinal through-hole 339 of the resilient block 33 and are then embedded in the transition groove 337. The elastic connecting member 335 is arranged as an elastic rope, and knots 3351 are formed by tying both ends of the elastic rope, and the knots 3351 at both ends of the elastic connecting member 335 are clamped in the receiving groove 338, so that the elastic connecting member 335 is relatively fixed to one side of the resilient block 33 distributed along the inner side wall of the outer frame 31. The formation of the receiving groove 338 provides a receiving space for the knots 3351.

[0030] When the surface of the seat cushion 3 is pressed, two adjacent resilient blocks 33 are pressed to descend to different depths. Through grooves 4 are formed on the surfaces where two adjacent resilient blocks 33 are in contact with each other. The through grooves 4 are formed along the height direction of the resilient blocks 33 and are arranged corresponding to the transverse through-holes 334 or the longitudinal through-holes 339. When two adjacent resilient blocks 33 are pressed to descend to different depths, the elastic connecting member 335 deforms under the action of pressure, so that the elastic connecting member 335 bends between the two resilient blocks 33, and the bent section of the elastic connecting member 335 transitions in the through grooves 3 of the two adjacent resilient blocks 33, so as to avoid the elastic connecting member 335 being squeezed between the two adjacent resilient blocks 33 as much as possible.

[0031] When a person's buttocks sit on the seat cushion 3, in order to enable the surface of the seat cushion 3 to have a good heat dissipation effect, the abutting portion 331 of the resilient block 33 is arranged in a trapezoidal shape, so that a V-shaped groove 336 is formed between the abutting portions 331 of two adjacent resilient blocks 33, thereby increasing the air circulation on the surface of the seat cushion 3, so that the surface of the seat cushion 3 has a good heat dissipation effect. The resilient blocks 33 are made of wood materials, so that the surface of the seat cushion 3 has a high structural strength. When the descending depths of the resilient blocks 33 are different, the two adjacent resilient blocks 33 will rub against each other, and the resilient blocks 33 made of wood materials are not easily worn, so that the seat cushion 3 has a longer service life.

[0032] Combined Figure 4 As shown, the present invention discloses a preparation method of the above seat cushion, including the following steps: S1. Form a rebound block group 5 by combining several rebound blocks 33. First, arrange the rebound blocks 33 in sequence along the horizontal and vertical directions in the same plane, so that each rebound block 33 forms a rectangle with N groups in the horizontal direction and M groups in the vertical direction. Select elastic ropes as the elastic connectors 335, prepare N first elastic ropes and M second elastic ropes, respectively thread the N first elastic ropes into the horizontal through holes 334 of N groups of rebound blocks 33, and thread the M second elastic ropes into the vertical through holes 339 of M groups of rebound blocks 33, so that the N first elastic ropes and the M second elastic ropes are arranged staggered in the height direction. The two ends of the first elastic rope pass through the horizontal through hole 334 of the rebound block 33, and the two ends of the second elastic rope pass through the vertical through hole 339 of the rebound block 33. Embed the first elastic rope and the second elastic rope passing through the rebound block 33 into the transition groove 337 of the rebound block 33, and the knots 3351 at the ends of the first elastic rope and the second elastic rope are clamped into the receiving grooves 338 on the side surface of the rebound block 33 for fixation, so that several rebound blocks 33 are connected to each other to form a rebound block group 5.

[0033] S2. Separate the frame body 314 and the bottom plate 315 of the outer frame 31, turn the lower port of the frame body 314 upward, and install the assembled rebound block 33 group into the installation groove 311 of the outer frame 31 from the lower port of the frame body 314. During installation, the abutting parts 331 of each rebound block 33 face the limiting blocks 313 of the outer frame 31, and the abutting parts 331 of each rebound block 33 pass through the bottom opening of the outer frame 31, so that the limiting parts 333 on the side surfaces of the edge rebound blocks are abutted against the limiting blocks 313.

[0034] S3. Face one side of the first sponge layer 323 of the elastic layer 32 toward the rebound block group 5 in the outer frame 31, and install the first sponge layer 323 from the lower end of the outer frame 31 upward into the installation groove 311 of the outer frame 31, so that the first sponge layer 323 of the elastic layer 32 is abutted against the lower surface of the rebound block group 5. Then, install the second sponge layer 322 and the air fiber layer 321 from the lower end of the outer frame 31 upward in sequence.

[0035] S4. Cover the bottom plate 315 on the bottom end of the frame body 314, and make the bottom plate 315 abut against the air fiber layer 321. Then, fix the bottom plate 315 and the frame body 314 by bolt locking.

[0036] When the user sits on the seat cushion 3 of the chair, the human body exerts pressure on the surface of the seat cushion 3, and different positions on the surface of the seat cushion 3 will be subjected to different pressures, so that each resilient block 33 in the seat cushion 3 descends to different depths according to different pressures. The air fiber layer 321, the second sponge layer 322, and the first sponge layer 323 in the elastic layer 32 have different densities, making the sinking depths of the resilient blocks 33 more reasonable and the force dispersion more uniform, thereby expanding the contact area between the surface of the seat cushion 3 and the human buttocks, and thus reducing the pressure of the seat cushion 3 on the human buttocks. In addition, the user can adjust the angle of the backrest plate 22 so that a suitable angle is maintained between the backrest plate 22 and the seat cushion 3, increasing the contact area between the human back and the backrest plate 22 to disperse the pressure on the user's back, so as to achieve a good user experience.

[0037] Each resilient block 33 descends under the action of pressure. When two adjacent resilient blocks 33 are pressed to descend to different depths, the elastic connecting member 335 deforms under the action of pressure, and the elastic connecting member 335 bends between the two resilient blocks 33, and the bent section of the elastic connecting member 335 transitions in the through grooves 3 of the two adjacent resilient blocks 33. When the user stands up, each resilient block 33 returns to its original position under the action of the elastic connecting member 335, so that each resilient block 33 is on the same horizontal plane. The V-shaped grooves 336 formed between the resilient blocks 33 enable the surface of the seat cushion 3 to have a good heat dissipation effect. When the user sits on the chair, the seat cushion 3 can be adjusted to a suitable height through the lifting cylinder 12, so that the user has a good experience when using the chair.

[0038] The present invention has been described exemplarily above in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited by the above-mentioned manner. As long as various non-substantive improvements are made by adopting the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A cushion, characterized in that: it includes an outer frame, an elastic layer, elastic connectors and a plurality of resilient blocks. An installation groove is formed inside the outer frame, and the elastic layer is arranged in the installation groove; a plurality of the resilient blocks are arranged in sequence and are connected to each other through elastic connectors to form a resilient block group; one end of the resilient block group is embedded in the installation groove and is arranged on the upper surface of the elastic layer; when the resilient block is under pressure, it descends to different depths of the elastic layer; when the pressure is eliminated, the resilient block returns to the upper surface of the elastic layer under the action of the elastic connector.

2. The cushion according to claim 1, characterized in that: the resilient blocks are arranged in sequence along the transverse and longitudinal directions. Independent transverse through holes and longitudinal through holes are formed on the resilient blocks. The transverse through holes penetrate through the resilient blocks transversely, and the longitudinal through holes penetrate through the resilient blocks longitudinally. The transverse through holes and the longitudinal through holes are arranged in a staggered manner along the height direction of the resilient blocks; the elastic connectors include first elastic connectors and second elastic connectors. The first elastic connectors are inserted into the transverse through holes of the resilient blocks to connect the resilient blocks in series into several rows; the second elastic connectors are inserted into the longitudinal through holes of the resilient blocks to connect the resilient blocks in series into several columns; both ends of the first elastic connectors and the second elastic connectors are fixed to the resilient blocks close to the inner side wall of the outer frame or are fixed to the inner side wall of the outer frame.

3. The cushion according to claim 2, characterized in that: the resilient block includes an installation part and a resisting seat part. The resisting seat part is located above the installation part. The transverse through holes and the longitudinal through holes are located on the installation part. The resisting seat part is trapezoidal, and a V-shaped groove is formed between the resisting seat parts of two adjacent resilient blocks.

4. The cushion according to claim 3, characterized in that: through grooves are formed on the side surfaces of two resilient blocks that are abutted against each other, and the through grooves are communicated with the transverse through holes or the longitudinal through holes.

5. The cushion according to any one of claims 2 to 4, characterized in that: the resilient blocks include edge resilient blocks distributed along the inner peripheral side of the outer frame. A limiting block is formed at the top end of the outer frame. A limiting part is formed on one side of the edge resilient block, and the limiting part is located below the limiting block.

6. The cushion according to claim 5, characterized in that: the transverse through holes and the longitudinal through holes penetrate through the limiting part. A transition groove and a receiving groove are further formed at the limiting part of the edge resilient block. One end of the transition groove is communicated with the receiving groove, and the other end of the transition groove is communicated with the transverse through hole or the longitudinal through hole; the elastic connector is an elastic rope, and a knot is arranged at the end of the elastic rope; one end of the elastic rope passes through the transition groove and the knot is clamped in the receiving groove.

7. The cushion according to claim 6, characterized in that: the edge resilient blocks include end resilient blocks arranged at the corner positions. Two transverse through holes and two longitudinal through holes are formed on the end resilient blocks. The two transverse through holes or the two longitudinal through holes are arranged along the height direction of the resilient blocks, so that the resilient blocks located at the corners of the outer frame can be used interchangeably.

8. The cushion according to claim 1, characterized in that: The elastic layer is composed of one or more of sponge material, air fiber material, and polyurethane material.

9. A seat cushion according to claim 8, characterized in that: The elastic layer sequentially includes a first sponge layer, a second sponge layer, and an air fiber layer from top to bottom, and the densities of the first sponge layer, the second sponge layer, and the air fiber layer are all different.

10. A chair, characterized in that: It includes the seat cushion according to any one of claims 1-9, and further includes a base, and the seat cushion is fixedly arranged on the base.

11. The chair according to claim 10, characterized in that: The chair further includes a backrest assembly, the backrest assembly includes a backrest frame and a backrest plate, the backrest frame is fixedly installed at the bottom of the outer frame, the backrest plate is hinged to the backrest frame, and the included angle between the backrest plate and the seat cushion is A, and 90° < A < 130°; the base includes a seat frame, a lifting cylinder, and a plurality of rollers, the plurality of rollers are arranged at the bottom end of the seat frame, the lifting cylinder is fixedly arranged on the seat frame, and the seat cushion is installed on the lifting cylinder to drive the seat cushion to lift.

12. A method for preparing a seat cushion, characterized in that: Using the seat cushion according to any one of claims 1-9, including the following steps: S1. Arrange the rebound blocks in sequence in the same plane along the horizontal and vertical directions, and connect them to each other through elastic connectors to form a rebound block group; S2. The lower end of the outer frame is open, an installation groove is formed inside the outer frame, a limiting block is formed at the top end of the outer frame, the rebound blocks include edge rebound blocks distributed along the inner peripheral side of the outer frame, and a limiting portion is arranged on the outer side of the edge rebound blocks; Install the rebound block group from the lower end of the outer frame upwards until the edge limiting portion contacts the limiting block of the outer frame; S3. Install the elastic layer from the lower end of the outer frame upwards to the lower surface position of the rebound block group; S4. Seal a bottom plate on the lower surface of the rebound block group to fix the bottom plate on the outer frame.

13. The method for preparing a seat cushion according to claim 12, characterized in that: In step S1, the rebound blocks are arranged in a rectangle with N groups in the horizontal direction and M groups in the vertical direction in the same plane; The elastic connector is an elastic rope, the elastic rope includes N first elastic ropes and M second elastic ropes, each first elastic rope passes through a group of horizontally arranged rebound blocks, each second elastic rope passes through a group of vertically arranged rebound blocks, and both ends of the first elastic rope and the second elastic rope are limited on the edge rebound blocks; the first elastic rope and the second elastic rope are arranged staggered in the height direction.

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