CN221179903U

CN221179903U - Novel chair seat

Info

Publication number: CN221179903U
Application number: CN202322511042.9U
Authority: CN
Inventors: 程军; 刘洋; 刘拥华
Original assignee: UE Furniture Co Ltd
Current assignee: UE Furniture Co Ltd
Priority date: 2023-09-12
Filing date: 2023-09-12
Publication date: 2024-06-21
Anticipated expiration: 2033-09-12

Abstract

The utility model provides a novel chair seat, which comprises: the elastic cushion and the elastic plate with elastic force are fixed together to form an integral cushion, and then the elastic plate is fixed above the seat frame, so that when the cushion is subjected to downward sitting force, the elastic plate can realize elastic deformation and resetting in the cavity of the seat frame; under the premise of ensuring comfortable sitting feeling of the cushion, the effect of installing the cushion on the seat frame capable of installing the mesh cloth is realized, and the universality of the seat frame is improved.

Description

Novel chair seat

Technical Field

The utility model relates to the field of ergonomic chairs, in particular to a novel chair seat.

Background

Most of the seats of the existing ergonomic chairs are mesh seats, supporting pieces of the mesh seats are seat frames, hollow states are kept between the upper end and the lower end of the seat frames, the mesh seats are formed by fixing a layer of tight mesh cloth above the seat frames, and the mesh seats are breathable and fresh for sitting feeling of people due to the characteristics of light, thin and porous mesh cloth, and the shape of the seat frames is attractive; however, due to the light and thin design of the mesh cloth, the rebound resilience generated by sitting feeling is poor; this elasticity does not meet the sitting requirements of the user.

Therefore, the cotton seat is installed on the ergonomic chair to be a new use requirement for people, and the sitting piece of the cotton seat is a cotton pad, and the cotton pad ensures the comfortable sitting feeling of the cotton seat which can rebound by additionally installing a plurality of spring bags inside the elastic cotton pad; the problem of poor rebound resilience generated by mesh cloth is solved, but the thickness of the cotton pad is far greater than that of a common cotton pad due to the addition of the spring package; the processing cost of the cotton pad is greatly increased while the processing efficiency of the cotton pad is affected; the special structure of the cotton pad makes the support piece of the cotton pad and the seat frame structure as the mesh support piece have great difference; that is, the cotton seat cannot be directly mounted on the seat frame like a mesh cloth, but is exposed to the outside; to manufacture an ergonomic chair with a cotton seat, a support must be remade that matches the cotton seat; the result of the different structures of the cotton pad and the mesh cloth is that the supporting pieces of the cotton pad and the mesh cloth cannot be unified into a seat frame with the same structure, so that the universality of the seat frame is reduced, the production cost of the cotton seat is increased, and the processing technology is also complicated.

To this end, the present inventors have found a method for solving the above-mentioned problems through beneficial studies and studies, and the technical solutions to be described below are made in this context.

Disclosure of Invention

In order to solve the technical problems, the utility model aims to provide a novel chair seat: the elastic cushion and the elastic plate with elastic force are fixed together to form an integral cushion, and then the elastic plate is fixed above the seat frame, so that when the cushion is subjected to downward sitting force, the elastic plate can realize elastic deformation and resetting in the cavity of the seat frame; under the premise of ensuring comfortable sitting feeling of the cushion, the effect of installing the cushion on the seat frame capable of installing the mesh cloth is realized, and the universality of the seat frame is improved.

The technical scheme of the utility model is realized as follows:

A novel chair seat comprises a seat frame and a seat cushion fixed above the seat frame; the cushion comprises an elastic plate and a cushion which is fixed above the elastic plate and has elastic deformation capability;

The center of the seat frame is concave downwards, so that a substrate is formed at the bottom of the seat frame, and a cavity is formed between the substrate and the left side and the right side of the seat frame; the elastic plate is positioned in the cavity, and an empty space for deformation of the elastic plate is reserved between the elastic plate and the substrate;

the seat has an initial state and an elastic deformation state; when the cushion is subjected to downward sitting force, the elastic plate in the cushion is elastically deformed; at this time, the chair seat is in an elastic deformation state; when the sitting force is removed from the seat cushion, the spring plate and the seat are restored to the original states.

Preferably, the left side and the right side of the seat frame and the front side and the rear side of the seat frame form an annular edge on the seat frame; the elastic plate is fixed on the inner side of the annular edge; thereby providing a support structure for the seat cushion mounting.

Preferably, the soft cushion comprises an elastically deformable soft cushion body and a covering sleeve made of cloth or leather material and covered outside the soft cushion body, and the covering sleeve and the elastic plate are fixed at the edge of the elastic plate through gun nails; therefore, when the soft cushion is pressed, the elastic plate and the soft cushion can synchronously elastically deform.

Preferably, at least four rows of through holes which are symmetrically arranged along the left-right direction and are arranged at intervals are arranged at the rear of the elastic plate; the elastic plate is more easily elastically deformed behind the elastic plate subjected to the downward pressing sitting force, and the elastic supporting sense of the elastic plate is enhanced.

Preferably, the left and right adjacent rows of through holes are staggered in the front-rear direction; so that the elasticity of the elastic plate is uniformly distributed in all directions.

Preferably, the number of through holes in each row is sequentially reduced from the middle of the elastic plate to the left and right ends, so that a conical elastic supporting area is formed on the elastic plate; so that the elasticity of the elastic plate is gradually increased from front to back, and the human engineering is met.

Preferably, a through groove is arranged behind the cushion, and the through groove is positioned in an elastic supporting area on the elastic plate; the cushion is convenient for contact with the elastic supporting area on the elastic plate better when the cushion is subjected to downward sitting force, and then the elastic plate is elastically deformed.

Preferably, the through hole on the elastic plate is a rectangular hole; the rectangular holes enable the elastic plate to generate elastic force when being stressed so as to achieve the best effect.

Preferably, the outer side of the annular edge of the seat frame is fixedly connected with an annular barrier strip; the outer side of the barrier strip extends upwards and outwards to form an annular tilted edge above the barrier strip; the annular raised edge is higher than the annular edge above the seat frame; thereby the joint of the seat frame and the cushion is surrounded, and the function of protecting the seat frame is played.

Preferably, the annular raised edge of the barrier strip and the outer side of the soft cushion form a smooth transition surface, and then a decoration piece is formed on the seat; so that the chair seat is more exquisite in appearance.

Preferably, a mounting screw hole is formed below the seat frame, a mounting hole is formed in the inner edge of the barrier strip, and a threaded fastener penetrates through the mounting hole and then is screwed into the mounting screw hole to fix the mounting screw hole and the barrier strip together; so that the barrier strip is integrated with the seat frame in appearance.

Preferably, counter sunk holes are formed in the inner side of the annular edge of the seat frame, and the counter sunk holes and the mounting screw holes are staggered, so that interference between the elastic plate and the barrier strip threaded fastener is avoided; the inner edge of the elastic plate is provided with a threaded hole, and the threaded fastener penetrates through the countersunk head hole and then is screwed into the threaded hole to fix the elastic plate and the countersunk head hole together; the elastic plate has the foundation of stress rebound.

Preferably, a positioning part is arranged above the elastic plate, and the positioning part comprises positioning bosses which are arranged at intervals along the periphery of the elastic plate; positioning holes are arranged at intervals along the periphery of the soft cushion below the soft cushion; the positioning convex table is clamped in the positioning hole; the threaded holes of the elastic plates are arranged on the positioning bosses; the elastic plate is convenient to align when fixed with the soft cushion.

Preferably, a positioning structure is arranged between the elastic plate and the seat frame, and comprises a convex rib formed by protruding upwards at the front side of the seat frame and a clamping groove formed by recessing upwards below the front side of the elastic plate; the convex rib is clamped in the clamping groove; the elastic plate is convenient to align when fixed with the seat frame.

Preferably, when the cushion is fixed on the seat frame, the elastic plate is arranged at the upper end of the seat frame and is positioned at the inner side of the annular edge of the seat frame, and at the moment, the annular edge and the outer side of the cushion form a smooth transition surface, so that a decoration piece is formed on the seat; so that the seat can look more attractive in appearance.

The principle and beneficial effects of the utility model adopting the technical scheme are as follows:

The utility model provides a novel chair seat, which is formed by fixing an elastic cushion and an elastic plate with elastic force together into an integral cushion; the cushion has the comfort of the cushion and the rebound resilience of the elastic plate; the elastic plate is fixed on the seat frame, and when the cushion is subjected to downward sitting force, the elastic plate can realize elastic deformation and resetting in the cavity of the seat frame; the design ensures that the seat frame does not need to be independently configured for the cotton pad type sitting piece when the seat is processed; by improving the universality of the seat frame, the manufacturing process of the seat is simplified, and the production cost is reduced.

Drawings

FIG. 1 is an exploded view of the seat of embodiment 1;

FIG. 2 is a schematic view of the structure of the seat frame in embodiment 1 at different angles;

FIG. 3 is a schematic view of the structure of the cushion;

FIG. 4 is a schematic structural view of a spring plate;

FIG. 5 is a top view of the seat;

FIG. 6 is an enlarged cross-sectional view of the seat in example 1;

FIG. 7 is a partial enlarged view of the seat frame and the spring plate of the embodiment 1;

FIG. 8 is a schematic view of the structure of the barrier rib in embodiment 1;

FIG. 9 is an enlarged cross-sectional view of the seat in example 2;

The reference numerals are as follows: the seat comprises a seat body, a cushion, a 2-elastic plate, a 3-seat frame, a 4-baffle strip, a 6-cushion, a 101-positioning hole, a 102-groove, a 103-through groove, a 201-threaded hole, a 202-through hole, a 203-elastic supporting area, a 204-middle area, a 205-convex strip, a 206-clamping groove, a 207-positioning boss, a 301-countersunk hole, a 302-mounting screw hole, a 303-cavity, a 304-annular edge, a 305-substrate, a 306-side baffle, a 307-convex strip, a 401-annular edge-lifting area, a 402-mounting hole and a 403-avoiding area.

Detailed Description

In order that the above-recited objects, features and advantages of the present utility model will be more clearly understood, a more particular description of the utility model will be rendered by reference to the appended drawings and appended detailed description. It should be noted that, without conflict, the embodiments of the present utility model and features in the embodiments may be combined with each other.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model, but the present utility model may be practiced in other ways than those described herein, and therefore the scope of the present utility model is not limited to the specific embodiments disclosed below.

As shown in fig. 1-9, the utility model provides a novel chair seat, so that a seat frame used for installing mesh cloth on the chair seat can be provided with a cotton pad type seat piece, and the universality of the seat frame is improved; the utility model includes various embodiments, specific embodiments being as follows:

Example 1: as shown in fig. 1 to 8, the present embodiment provides a novel seat comprising a seat frame 3 and a seat cushion 6 fixed above the seat frame 3; the cushion 6 comprises an elastic plate 2 and a cushion 1 which is fixed above the elastic plate 2 and has elastic deformation capability;

As shown in fig. 2, the seat frame 3 is a supporting frame body which is generally made of plastic and is hollow in the interior; the center of the seat frame 3 is concave downwards, so that a substrate 305 is formed at the bottom of the seat frame 3, and a cavity 303 is formed between the substrate 305 and the left side and the right side of the seat frame 3; so that there is enough space inside the seat frame 3; the left side and the right side of the seat frame 3 and the front side and the rear side of the seat frame 3 form an annular edge 304 on the seat frame 3; the elastic plate 2 is fixed inside the annular edge 304; the annular edge 304 provides a support structure for the mounting of the seat cushion 6.

Specifically, the spring plate 2 is typically made of an elastic plastic, so that excellent resilience and portability of the spring plate 2 are maintained; the spring plate 2 is used for supporting the soft cushion 1, so that the spring plate 2 is required to provide supporting force and resilience force for the soft cushion 1; in fact, if a plurality of springs are arranged below the cushion 1 to support the cushion 1, the elasticity of the springs can also enable the cushion 1 to generate resilience force when being subjected to downward sitting force, but in order to support the cushion 1, a plurality of springs are necessarily arranged in the cavity 303 of the seat frame 3, and the design not only makes the seat processing technology complex and increases the manufacturing cost, but also is most important that the seat cannot be completely attached to the cushion 1, so that a pressing sense can be generated by a user, and the use experience of the seat is affected; therefore, the support piece of the cushion 1 is selected as the elastic plate of the elastic plate 2, and compared with a spring, the structure is light and convenient, and the support piece can be attached to the cushion 1 to the greatest extent, so that the use experience of the chair seat is further optimized.

Further, as shown in fig. 4 to 7, the rear of the elastic plate 2 is usually the main sitting area of the user, that is, the effect of rebound should be better when the rear of the elastic plate 2 is subjected to downward sitting force; to achieve such an effect, at least four rows of through holes 202 are provided symmetrically in the left-right direction at intervals at the rear of the elastic plate 2; compared with the area of the elastic plate 2, which is not provided with the through holes 202, the symmetrical through holes 202 enable the stress in the elastic plate 2 to be further released when the back of the elastic plate 2 is subjected to downward pressure, so that resilience force is better generated to optimize the sitting feel of the chair seat.

Still further, if only for making the elastic force behind the elastic plate 2 larger than that of other areas on the elastic plate 2, the through holes 202 of each row in the left-right direction may be aligned in the front-rear direction; however, since a middle area 204 is formed between each through hole 202 of each column, if each through hole 202 of each column is arranged in an aligned manner, the middle area 204 of each through hole 202 of each column forms a long strip area without holes, so that the resilience force on the long strip area is smaller, and the resilience force behind the whole elastic plate 2 is uneven; therefore, in order to make the distribution of the resilience force behind the elastic plate 2 uniform, the left and right adjacent rows of through holes 202 are arranged in a staggered manner in the front-rear direction on the rear of the elastic plate 2; so that the elastic plate 2 achieves the optimal rebound effect.

Still further, when the user uses the seat to make the rear of the elastic plate 2 receive the downward pressure, the stress on the elastic plate 2 must be gradually increased from front to back in consideration of the sitting state of the human body, which requires that the resilience of the elastic plate 2 also be gradually increased from front to back, so that in order to provide the user with a better sitting resilience, the number of through holes 202 in each row provided at the rear of the elastic plate 2 is sequentially reduced from the middle to left and right ends of the elastic plate 2, and a tapered elastic support region 203 is formed on the elastic plate 2; thereby achieving the effect that the resilience force generated on the resilient plate 2 is gradually reduced from front to back.

Still further, the purpose of forming the through hole 202 on the elastic plate 2 is to keep the elastic plate 2 elastic, from this point of view, the shape of the through hole 202 may be any pattern, and when the elastic plate 2 is subjected to downward sitting force, the through hole 202 may be configured as a circular hole for smooth release of stress on the elastic plate 2; however, when the elastic plate 2 is subjected to downward sitting force, the elastic plate 2 is elastically deformed, and the periphery of the round hole is pulled by deformation forces generated in multiple directions, so that the periphery of the round hole is easily cracked; in addition, because the sitting force generated by the user when using the seat mainly changes in the front-back direction, the through hole 202 on the elastic plate 2 is set to be a rectangular hole, the rectangular hole design accords with the changing direction of the sitting force, the tensile pulling effect on the outer side of the through hole 202 is better, the optimal resilience force is provided for the elastic plate 2, and the service life of the elastic plate 2 can be ensured to the greatest extent.

As shown in fig. 3 to 5, the cushion 1 comprises a cushion body which can be elastically deformed and a cover (not shown) which is made of cloth or leather and is covered outside the cushion body, and the material of the cushion body is usually sponge or rubber; when the seat is under downward sitting force, the cushion body can generate elastic deformation, and provides comfortable sitting feeling for the sitting person.

In order to carry out dust-proof and water-proof treatment on the installation combination position of the elastic plate 2, the cushion 1 and the seat frame 3, specifically, the baffle strip 4 and the seat frame 3 are fixed together in the following way: as shown in fig. 6 and 8, the barrier strip 4 is sleeved on the outer side of the lower part of the seat frame 3, so that the seat frame 2 passes through the avoidance area 403 inside the barrier strip 4; the lower part of the seat frame 3 is provided with a mounting screw hole 302, the inner edge of the barrier strip 4 is provided with a mounting hole 402, and a threaded fastener penetrates through the mounting hole 402 and then is screwed into the mounting screw hole 302 to fix the two.

Specifically, a cover (not shown) around the cushion body is turned down to be attached to an outer edge of the lower portion of the elastic plate 2, and the cover (not shown) and the elastic plate 2 are fixed together by using a gun nail at the attachment portion.

Further, as shown in fig. 3-7, in order to facilitate positioning when the cushion 1 and the elastic plate 2 are combined and fixed, a positioning part is arranged above the elastic plate 2, and the positioning part comprises positioning bosses 207 which are arranged at intervals along the periphery of the elastic plate 2; positioning holes 101 are arranged at intervals along the periphery of the soft cushion 1 below the soft cushion 1; the positioning boss 207 is clamped in the positioning hole 101; the threaded holes 201 of the elastic plate 2 are arranged on the positioning bosses 207; when the cushion 1 is placed above the elastic plate 2, the positioning boss 207 is clamped into the positioning hole 101, so that the cushion 1 can be quickly aligned above the elastic plate 2, and then the fixation with the elastic plate 2 is completed; a raised line 205 integrally formed with the elastic plate 2 is arranged above the front side of the elastic plate 2, the raised line 205 extends upwards, and when the positioning boss 207 is clamped in the positioning hole 101, the raised line 205 is clamped in the groove 102; thereby playing an auxiliary positioning role when the soft cushion 1 and the elastic plate 2 are combined and fixed.

Still further, in order to make the cushion 1 transmit the pressure to the elastic plate 2 to the maximum extent when receiving the downward sitting force, a through slot 103 is provided behind the cushion 1, and the through slot 103 is an internal stress release slot on the cushion 1; the through groove 103 is positioned in an elastic supporting area 203 on the elastic plate 2; when the cushion 1 is pressed, the through groove 103 plays a role of stress release, so that the elastic deformation degree of the front side and the rear side of the through groove 103 on the cushion 1 is increased, the lower side of the cushion 1 is tightly attached to the supporting area 203, and the elastic plate 2 provides larger resilience force for the cushion 1.

Specifically, the spring plate 2 and the seat frame 3 are fixed together in such a way that: as shown in fig. 2 and 9, counter bores 301 are arranged inside the annular edge 304 of the seat frame 3, and the counter bores 301 and the mounting screw holes 302 are staggered to avoid interference with the fixing piece for mounting the barrier strip 4; the inner edge of the elastic plate 2 is provided with a threaded hole 201, the threaded hole 201 is positioned on the positioning boss 207, and a threaded fastener penetrates through the counter bore 301 and is screwed into the threaded hole 201 to fix the two.

Specifically, in order to align the position of the spring plate 2 more quickly when the spring plate 2 is fixed to the seat frame 3, a positioning structure is provided between the spring plate 2 and the seat frame 3, and the positioning structure includes a protruding rib 307 protruding upwards from the front side of the seat frame 3 and a clamping groove 206 recessed inwards from the lower side of the front side of the spring plate 2; when the spring plate 2 is placed on the seat frame 3, the convex rib 307 is clamped in the clamping groove 206 below the spring plate 2, so that the spring plate 2 can be quickly aligned when being installed, and is more quickly installed with the seat frame 3.

As shown in fig. 6, the installed seat provides a comfortable sitting feel for the seated user while also maintaining good resilience of the seat cushion 6; the special body shows an elastic deformation state and a reset state of the chair seat; when the seat cushion 6 receives a downward seating force, the elastic plate 2 in the seat cushion 6 is elastically deformed in the cavity 303; at this time, the chair seat is in an elastic deformation state; when the sitting force is removed from above the seat cushion 6, the spring plate 2 is reset in the cavity 303; at this time, the chair seat is switched to a reset state; the cushion 1 is fixed on the hollow seat frame 3, and a spring structure is not required to be arranged in the cushion 1, so that the universality of the seat frame 3 is improved, and the internal structure of the cushion 1 with elasticity is simplified.

Furthermore, the barrier strip 4 plays a role in decoration of the chair seat besides waterproof and dustproof; when the cushion 6 is fixed on the seat frame 3, the elastic plate 2 is lapped at the upper end of the seat frame 3 and is positioned at the inner side of the annular tilted edge 401 of the baffle strip 4, at the moment, the annular tilted edge 401 and the outer side of the cushion 1 form a smooth transition surface, and the appearance gives a pleasant feel, so that a decoration piece is formed on the seat; so that the appearance of the whole seat can be more attractive.

Example 2: the present embodiment is different from embodiment 1 in that in this embodiment, the barrier strip 4 and the seat frame 3 are integrally formed, that is, the seat frame 3 itself provides the waterproof, dustproof and decorative functions for the seat.

Specifically, as shown in fig. 9, when the barrier rib 4 is integrally formed with the seat frame 3, the annular edge 304 corresponds to the annular flange 401 of the barrier rib 4 in embodiment 1; that is, when the seat cushion 6 is fixed on the seat frame 3, the elastic plate 2 is mounted on the upper end of the seat frame 3 and is located inside the annular edge 304 of the seat frame 3, the annular edge 304 surrounds the outer side of the elastic plate 2, and meanwhile, the annular edge 304 and the outer side of the cushion 1 form a smooth transition surface, so that a decoration piece is formed on the seat; thereby the seat frame 3 has both the waterproof and dustproof functions and the decoration functions.

The utility model and its embodiments have been described above by way of illustration and not limitation, and the utility model is illustrated in the accompanying drawings and described in the drawings in which the actual structure is not limited thereto. Therefore, if one of ordinary skill in the art is informed by this disclosure, the structural mode and the embodiments similar to the technical scheme are not creatively designed without departing from the gist of the present utility model.

Claims

1. A novel chair seat, characterized in that: comprises a seat frame (3) and a cushion (6) fixed above the seat frame (3); the cushion (6) comprises an elastic plate (2) and a cushion (1) which is fixed above the elastic plate (2) and has elastic deformation capability;

The center of the seat frame (3) is concave downwards, a substrate (305) is formed at the bottom of the seat frame (3), and a cavity (303) is formed between the substrate (305) and the left side and the right side of the seat frame (3); the elastic plate (2) is positioned in the cavity (303), and an empty space for deformation of the elastic plate (2) is reserved between the elastic plate (2) and the substrate (305);

The seat has an initial state and an elastic deformation state; when the cushion (6) is subjected to downward sitting force, the elastic plate (2) in the cushion (6) is elastically deformed; at this time, the chair seat is in an elastic deformation state; when the sitting force is removed from the seat cushion (6), the elastic plate (2) and the seat are restored to the original states.

2. A novel chair according to claim 1, wherein: the left side and the right side of the seat frame (3) and the front side and the back side of the seat frame (3) form an annular edge (304) on the seat frame (3); the elastic plate (2) is fixed inside the annular edge (304).

3. A novel chair according to claim 1, wherein: the soft cushion (1) comprises an elastically deformable soft cushion body and a covering sleeve which is coated outside the soft cushion body and made of cloth or leather materials, and the covering sleeve and the elastic plate (2) are fixed at the edge of the elastic plate (2) through gun nails.

4. A novel chair according to claim 1, wherein: at least four rows of through holes (202) which are symmetrically distributed along the left-right direction at intervals are arranged at the rear of the elastic plate (2).

5. The novel chair according to claim 4, wherein: the left and right adjacent rows of through holes (202) are staggered in the front-rear direction.

6. The novel chair according to claim 4, wherein: the number of through holes (202) in each row is sequentially reduced from the middle of the elastic plate (2) to the left and right ends, and a conical elastic supporting area (203) is formed on the elastic plate (2).

7. The novel chair seat of claim 6 wherein: a through groove (103) is formed in the rear of the cushion (1), and the through groove (103) is located in an elastic supporting area (203) on the elastic plate (2).

8. The novel chair according to claim 4, wherein: the through holes (202) on the elastic plate (2) are rectangular holes.

9. A novel chair according to claim 2, wherein: the outer side of the annular edge (304) of the seat frame (3) is fixedly connected with an annular barrier strip (4); the outer side of the barrier strip (4) extends upwards and outwards to form an annular tilted edge (401) above the barrier strip (4); so that the annular raised edge (401) is higher than the annular edge (304) above the seat frame (3).

10. The novel seat according to claim 9, wherein: the annular raised edge (401) of the baffle strip (4) and the outer side of the soft cushion (1) form a smooth transition surface, and then a decoration piece is formed on the chair seat.

11. The novel seat according to claim 9, wherein: the mounting screw hole (302) is formed in the lower portion of the seat frame (3), the mounting hole (402) is formed in the inner edge of the barrier strip (4), and the threaded fastener penetrates through the mounting hole (402) and then is screwed into the mounting screw hole (302) to fix the mounting screw hole and the barrier strip together.

12. The novel seat according to claim 11, wherein: the inner side of the annular edge (304) of the seat frame (3) is provided with countersunk holes (301), the countersunk holes (301) and the mounting screw holes (302) are distributed in a staggered mode, the inner edge of the elastic plate (2) is provided with threaded holes (201), and the threaded fasteners penetrate through the countersunk holes (301) and then are screwed into the threaded holes (201) to fix the countersunk holes and the mounting screw holes together.

13. A novel chair according to claim 12, wherein: a positioning part is arranged above the elastic plate (2), and comprises positioning bosses (207) which are arranged at intervals along the periphery of the elastic plate (2); positioning holes (101) which are distributed at intervals along the periphery of the soft cushion (1) are arranged below the soft cushion (1); the positioning boss (207) is clamped in the positioning hole (101); the threaded holes (201) of the elastic plate (2) are arranged on the positioning bosses (207).

14. A novel chair according to claim 1, wherein: a positioning structure is arranged between the elastic plate (2) and the seat frame (3), and comprises a convex rib (307) which is formed by protruding upwards from the front side of the seat frame (3) and a clamping groove (206) which is formed by recessing inwards from the lower direction of the front side of the elastic plate (2); the convex rib (307) is clamped in the clamping groove (206).

15. A novel chair according to claim 2, wherein: the outer side of the annular edge (304) extends upwards and outwards, and forms a smooth transition surface with the outer side of the soft cushion (1), so that a decoration piece is formed on the seat.