CN114431658B

CN114431658B - Ergonomic seat

Info

Publication number: CN114431658B
Application number: CN202111655371.XA
Authority: CN
Inventors: 毛立; 孙杰; 沈杰; 陆翰南; 魏磊
Original assignee: Sunon Technology Co Ltd
Current assignee: Sunon Technology Co Ltd
Priority date: 2021-12-30
Filing date: 2021-12-30
Publication date: 2024-10-15
Anticipated expiration: 2041-12-30
Also published as: CN114431658A

Abstract

The invention discloses an ergonomic chair, a base configured to support with a main body of the chair; the rotary supporting seat is connected to the rear end of the base; the rotary supporting seat is configured to be used for connecting and supporting a back supporting body and a seat supporting body of the seat; the back support body is fixedly connected to the rear end of the rotary support seat; two sides of the rear end of the seat support body are respectively connected with the rotary support seat; the swinging device comprises a rotating cross shaft penetrating through the base along the left-right direction, a fulcrum is formed at a position corresponding to the middle of the base and the rotating cross shaft, and the rotating cross shaft is in rotating fit with the fulcrum so that the rotating cross shaft can rotate left and right relative to the base; both ends of the rotating transverse shaft penetrate out of the base and are connected with the rotating supporting seat; the rotary supporting seat synchronously rotates left and right relative to the base along with the rotary transverse shaft so as to drive the back supporting body and the seat supporting body to swing left and right; the seat and the back can correspondingly swing left and right according to the dynamic sitting posture change of a user, so that the seat is flexible and comfortable to use.

Description

Ergonomic seat

Technical Field

The invention relates to the field of seats, in particular to an ergonomic seat.

Background

In the prior art, a seat generally includes three parts, a base, a seat support, and a seat back, wherein the seat back is used to support the back of an occupant. Currently, existing chair backs generally include a fixed type and an adjustable angle type, and most of the adjustable angle type also refers to an adjustable tilting angle of the chair back, so as to provide different supporting angles to correspond to different riding requirements. There are also seats with a back capable of swinging left and right, but the office chair of this part can realize the small amplitude deflection of the back capable of swinging left and right by the connection of springs or other elastic materials, the deflection amplitude is limited, and the design does not consider the connection between the chair seat and the back, and the synchronous swinging of the chair seat cannot be realized. Therefore, an ergonomic chair needs to be designed, so that the chair back and the chair seat can swing dynamically, and the user can use the ergonomic chair comfortably.

According to investigation, a part of chairs only can rotate left and right, the dynamic sitting posture of a user changes integrally with the buttocks and the back, if only the chairs rotate left and right and the chair seat is fixed; instead, the use is relatively hard, and the effect is not ideal.

Still further, the utility model patent number CN202120829676.7 discloses a chair capable of swinging left and right, comprising a chair foot rest supported on the ground, a tray connected to the top end of the chair foot rest, and a chair back connected to the rear end of the tray; the top of the tray is fixedly connected with a fixing seat; the fixed seat is provided with a rotating shaft extending along the front and rear directions and penetrating through the front and rear side walls of the fixed seat, a seat is arranged above the fixed seat, and the front and rear ends of the seat are fixedly connected with the front and rear ends of the rotating shaft respectively; the two sides of the fixed seat are fixedly connected with an armrest frame which avoids the left-right swinging range of the seat and extends upwards, and the armrest frame is higher than the top of the seat and is provided with an armrest structure for supporting arms. The chair has the beneficial effects that the function of swinging left and right is separated from the tray, so that the structure of the chair is more reasonable, and the swinging stability is improved. The chair realizes the left-right swing of the chair seat by arranging the rotating shaft extending in the front-back direction; but fixing base fixed connection is on the tray, and the back of the chair is connected at the tray rear end, and this just makes only the seat support can swing about relative tray, and the back of the chair can not accomplish the swing effect again. And, the pivot runs through in the fixing base along the fore-and-aft direction, and certainly occupation space is bigger, and the tray inside of seat often still needs to set up control structure or gas pole adjustment mechanism etc. of acting as go-between for the structure installation is inconvenient.

Disclosure of Invention

The invention aims to overcome the defects in the prior art, and provides the ergonomic chair, wherein the base and the rotary support seat are in rotary fit through the horizontal rotary transverse shaft, the rotary transverse shaft can swing left and right relative to the base, and the occupied space of the base is small; both ends of the rotating cross shaft penetrate through and are connected with the rotating support seat; so that the rotary supporting seat can swing left and right relative to the base; the back support body and the seat support body are both connected to the rotary support seat, so that when a user uses the seat, the seat support body and the back support body can correspondingly swing left and right in a manner of matching with the dynamic sitting posture change of the user, the seat is better in flexibility, and the seat is more comfortable to use.

The technical scheme of the invention is realized as follows:

An ergonomic chair comprising: a base configured to support a main body of the seat; the rotary supporting seat is connected to the rear end of the base; the rotary supporting seat is configured to be used for connecting and supporting a back supporting body and a seat supporting body of the seat; the back support body is fixedly connected to the rear end of the rotary support seat; the seat support body is arranged above the base, and two sides of the rear end of the seat support body are respectively connected with the rotating support seat; the swinging device is arranged between the rear part of the base and the rotating support seat; the swinging device comprises a rotating cross shaft penetrating through the base along the left-right direction, a fulcrum is formed at a position corresponding to the middle of the base and the rotating cross shaft, and the rotating cross shaft is in rotating fit with the fulcrum so that the rotating cross shaft can rotate left and right relative to the base; both ends of the rotating cross shaft penetrate out of the base and are connected with the rotating support seat; the rotary supporting seat synchronously rotates left and right relative to the base along with the rotary transverse shaft so as to drive the back supporting body and the seat supporting body to swing left and right.

Preferably, the rear end of the base is provided with a matching part, the middle position of the matching part is provided with a mounting seat, and a first rotating groove which horizontally penetrates through the mounting seat is arranged in the mounting seat; the height of the first rotating groove in the vertical direction is larger than the diameter of the rotating transverse shaft; the rotating cross shaft is arranged in the first rotating groove in a penetrating way; and a rotating structure which enables the rotating cross shaft to rotate left and right relative to the mounting seat is arranged between the rotating cross shaft and the mounting seat. The mounting seat is arranged at the middle position of the matching part, the rotating transverse shaft is penetrated and rotatably matched in the mounting seat, and the structure is stable; and the rotary transverse shaft can rotate left and right relative to the middle position of the matching part; so that the rotation transverse axis is rotationally balanced.

Preferably, the rotating structure comprises a limit supporting shaft arranged in the mounting seat along the front-rear direction; the limiting support shaft is positioned at the middle position of the mounting seat, and is positioned at the lower end in the first rotating groove; correspondingly, a rotating groove which can be in rotating fit with the limiting support shaft is correspondingly formed in the bottom of the middle position of the rotating transverse shaft; the limiting support shaft is embedded in the rotating groove, the part, which is contacted with the rotating transverse shaft, of the limiting support shaft forms the fulcrum, and the rotating transverse shaft can rotate left and right around the limiting support shaft. A limit supporting shaft is arranged in the mounting seat along the front-rear direction, and a rotating groove is correspondingly arranged on the rotating transverse shaft; so that the limit support shaft is embedded and rotationally matched in the rotating groove; the limiting support shaft can limit the left-right offset of the rotating cross shaft and enable the rotating cross shaft to rotate by taking the limiting support shaft as a fulcrum; the utility model has two functions, and the structural design is ingenious.

Preferably, a through hole is arranged at the rear end of the matching part, and the limit support shaft passes through the through hole and is arranged in the mounting seat in a penetrating way; and the limiting support shaft is in interference fit with the mounting seat. The limiting support shaft is in interference fit with the mounting seat, and the contact friction force between the limiting support shaft and the mounting seat is large, so that the limiting support shaft can be limited to be separated from the mounting seat, and the connection is convenient.

Preferably, the spacing supporting shaft is a knurling shaft. The spacing supporting shaft further adopts the knurling shaft, so that the surface of the spacing supporting shaft is rough, the friction force between the spacing supporting shaft and the mounting seat is larger, and the interference fit effect is better; in addition, when the rotating transverse shaft rotates around the limiting support shaft, certain rotation damping exists.

Preferably, the base is hollow, a space is formed between the two sides of the mounting seat and the outer side wall of the matching part, and a sink groove arranged along the front-rear direction is formed at the space; reset spring pieces arranged along the front-back direction are respectively arranged in the sinking grooves at the two sides, the front ends of the reset spring pieces are connected with the base, and the rear ends of the reset spring pieces are tilted relative to the base and are positioned at the bottom of the rotating transverse shaft; the rotating cross shaft rotates downwards to press and act on the reset elastic piece. The mounting seat is just spaced from the outer side wall of the matching part, so that a sinking groove for mounting the reset spring plate can be correspondingly formed, the internal structure of the base is fully utilized, and the layout is reasonable; under the action of the reset elastic piece, the reset elastic piece on the corresponding side can be extruded when the transverse shaft is rotated to swing left and right; the seat support body and the back support body have good damping effect all the time in the swinging process, and the use is comfortable; and the reset spring piece can provide a reset spring force for rotating the transverse shaft after deformation, so that the seat support body and the back support body can be reset by themselves after a user leaves the seat.

Preferably, the reset spring is in a strip shape arranged along the front-back direction, an inserting bayonet is further arranged below the front of the base positioned in the sinking groove, and the front end of the reset spring is obliquely inserted into the inserting bayonet downwards; the front end of the sinking groove is provided with an abutting part, and the bottom surface of the reset spring piece abuts against the abutting part so that the rear end of the reset spring piece is tilted. The width of the base is effective, so that a strip-shaped reset spring piece is arranged in the front-back direction; through this mounting structure of shell fragment resets for reset shell fragment rear end perk makes reset shell fragment rear end can take place elastic deformation in vertical direction, then can respond the rotation action of rotation cross axle and take place elastic deformation.

Preferably, a second rotating groove through which the avoidance rotating transverse shaft passes is correspondingly formed in the outer side wall of the matching part, and the height of the second rotating groove in the vertical direction is larger than that of the first rotating groove. The rotating cross shaft takes the central position of the mounting seat as a rotating point, and then the farther away from the mounting seat, the larger the swinging distance of the rotating cross shaft in the vertical direction is; the second rotating groove is then designed to be larger than the first rotating groove; the design is ingenious and consideration is given.

Preferably, the rear end of the base is provided with a matching part, and the rotating transverse shaft is horizontally penetrated in the matching part; the front end of the rotary supporting seat is correspondingly provided with a notch for accommodating the matching part, and two sides of the notch are respectively provided with a rotary connecting seat for connecting a rotary transverse shaft; the matching parts are embedded in the gaps, and two sides of the rotating transverse shaft respectively penetrate out of the matching parts and are connected to the rotating connecting seat. The matching part at the rear end of the base is embedded and arranged in the rotary supporting seat, so that the base and the rotary supporting seat are tightly connected together; the integrity is better.

Preferably, the rotary connecting seat is detachably connected with the rotary transverse shaft, and the part of the rotary transverse shaft penetrating out of the matching part comprises shaft milling planes respectively arranged at the front end and the rear end and rotary cambered surfaces respectively positioned at the upper end and the lower end; the inner side wall of the rotary connecting seat is provided with a connecting circular groove which can be in rotary fit with the rotary transverse shaft and an avoidance channel which is communicated with the connecting circular groove and is arranged along the front-back direction, and the opening of the avoidance channel is positioned at the front end; the height of the notch of the avoidance channel is matched with the front-back distance between two adjacent shaft milling planes on the rotation transverse shaft. When the rotary support seat is installed, the rotary support seat is required to be vertically placed so that the opening of the avoidance channel is vertically downward, then the rotary transverse shaft can enter the connection circular groove through the avoidance channel, and after the rotary transverse shaft enters the connection circular groove, the rotary cambered surface is in rotary fit with the connection circular groove, and then the rotary support seat can be rotated backwards to be based on the same horizontal plane with the base; and in this position, the rotation cross shaft cannot enter the avoidance channel again, so that the rotation cross shaft can be restricted from being separated from the connection circular groove.

Preferably, the matching part is in a narrowed state relative to the base, and the width of the front end of the rotating support seat is matched with the width of the base. After the base and the rotary supporting seat are in rotary fit, the width between the base and the rotary supporting seat is consistent, and the integral degree is higher.

Preferably, a torsion member is provided between the front end of the seat support and the base; the both ends of torsion member are connected with seat supporter and base respectively, and torsion member can take place elastic torsion deformation in the left and right directions. The front end of the seat support body can correspondingly swing when the rear end of the seat support body swings along with the rotating support seat, so that the overall swing effect of the seat support body is good.

Preferably, the torsion member is inclined obliquely upward from the back to the front; the lower end of the torsion piece is connected with the base, and the upper end of the torsion piece is connected with the base support body; the base support is in a picking state relative to the base. The front end of the seat support body is connected with the base through the torsion piece, and the rear end of the seat support body is connected with the rotating support seat; so that the base support is hollow relative to the base, and the structure is simple and attractive; and the seat support body is enabled to be lighter and more flexible when being forced to swing left and right relative to the base.

Preferably, the torsion member is made of spring steel sheet. Adopts a spring steel sheet to form a spring, the strength is high and the durability is high; the connection strength between the seat support body and the base can be ensured while the left and right elastic deformation is satisfied.

Preferably, the seat support body is of a frame structure, and comprises seat side support bodies respectively positioned at the left side and the right side; the rotary support seat comprises support arms which extend towards two sides in a mirror image mode, and the seat side support bodies are respectively connected with the support arms on the corresponding sides.

Preferably, the back support body is of a frame structure, and comprises a back support at the bottom and back side support bodies respectively positioned at two vertical sides; the back support is fixedly connected to the rear end of the rotary support seat; the bottom of the back side support body is provided with a downward extending connecting rod, and the connecting rod is configured to be connected with the rear end of the seat support body. The side support body is connected to the seat support body through the connecting rod, so that the integrity between the back support body and the seat support body is better, and the back support body and the seat support body are mutually related when swinging left and right.

The design starting point, the idea and the beneficial effects of the invention adopting the technical scheme are as follows:

1, the ergonomic chair of the invention can swing left and right relative to the base by arranging a horizontal rotation cross shaft in a matching part at the rear end of the base; both ends of the rotating cross shaft penetrate through the base, and the penetrating end of the rotating cross shaft is connected with the rotating support seat; so that the rotary supporting seat can swing left and right relative to the base; the back support body and the seat support body are both connected to the rotary support seat, so that when a user uses the seat, the seat support body and the back support body can correspondingly swing left and right in matching with the dynamic sitting posture change of the user, the seat has better flexibility, and the user is more comfortable to use; only a horizontal rotating cross shaft is required to be arranged at the rear end of the base in a penetrating mode, so that occupied space is small, and connection is more convenient.

2, A mounting seat is arranged in the matching part, and a rotating transverse shaft is arranged in the mounting seat in a penetrating way from left to right; the limit support shaft is arranged at the rear end of the matching part in a penetrating manner along the front-rear direction, and can be arranged in the mounting seat in a penetrating manner and matched with the mounting seat; the bottom of the middle position of the rotating cross shaft is correspondingly provided with a rotating groove which can be in rotating fit with the limiting support shaft; so that the limit support shaft is inserted into the rotation groove; the rotating cross shaft can rotate left and right around the limiting support shaft by taking the limiting support shaft as a fulcrum; the limiting support shaft is embedded in the rotating groove and can also limit the left-right offset of the rotating transverse shaft, so that the rotating transverse shaft is stable in rotation; the design is ingenious. The limit support shaft is in interference fit with the matching part, so that the connection is convenient; the spacing supporting shaft also adopts a knurling shaft, so that the surface of the spacing supporting shaft is rough, the friction force between the spacing supporting shaft and the mounting seat is larger, and the interference fit effect is better; in addition, when the rotating transverse shaft rotates around the limiting support shaft, certain rotation damping exists.

3, A space is arranged between the two sides of the mounting seat and the outer side wall of the matching part respectively, so that a sinking groove for mounting the reset spring plate is arranged in the space, the internal structure of the base is fully utilized, and the layout is reasonable; the front end of the reset spring piece is connected with the base, and the rear end of the reset spring piece is tilted relative to the base and is positioned at the bottom of the rotating transverse shaft; under the action of the reset elastic piece, the reset elastic piece on the corresponding side can be extruded when the rotary transverse shaft swings left and right; the seat support body and the back support body have good damping effect all the time in the swinging process, and the use is comfortable; and the reset spring piece can provide a reset spring force for rotating the transverse shaft after deformation, so that the seat support body and the back support body can be reset by themselves after a user leaves the seat.

4, A torsion piece capable of generating elastic torsion deformation in the left-right direction is arranged between the front end of the seat support body and the base; the both ends of torsion piece are connected with seat supporter and base respectively for when the seat supporter rear end follows rotation supporting seat swing, the front end of seat supporter also can corresponding swing, makes the whole swing effect of seat supporter good. The torsion piece inclines obliquely upwards from back to front; the lower end of the torsion piece is connected with the base, and the upper end of the torsion piece is connected with the base support body; the base support is in a picking state relative to the base. The front end of the seat support body is connected with the base through the torsion piece, and the rear end of the seat support body is connected with the rotating support seat; so that the base support is hollow relative to the base, and the structure is simple and attractive; and the seat support body is enabled to be lighter and more flexible when being forced to swing left and right relative to the base.

Drawings

FIG. 1 is a side view of the seat of the present invention in an embodiment;

FIG. 2 is a schematic perspective view of the seat according to the embodiment of the present invention;

FIG. 3 is a schematic top view of a three-dimensional structure of the seat according to an embodiment of the present invention;

FIG. 4 is a schematic perspective view of a rotary support base, a back support and a base support according to an embodiment of the present invention;

FIG. 5 is an exploded view of the base in combination with a rotating support and a rotating cross shaft in an embodiment of the present invention;

FIG. 6 is a schematic perspective view of the rotary support base and the rotary transverse shaft in the embodiment of the invention;

FIG. 7 is a schematic perspective view of the base and the rotating cross shaft in an embodiment of the present invention;

FIG. 8 is a schematic diagram of a perspective structure of a rotary support base rotating left and right with respect to a base in an embodiment of the present invention;

FIG. 9 is a side cross-sectional view of a rotary transverse shaft mated with a reset spring in an embodiment of the present invention;

FIG. 10 is a schematic perspective view of a connection between a limiting support shaft and a base in an embodiment of the present invention;

FIG. 11 is a schematic perspective view of a spacing support shaft and a rotating cross shaft in an embodiment of the present invention;

FIG. 12 is a side cross-sectional view of the spacing support shaft mated with the rotating cross shaft in an embodiment of the present invention;

Fig. 13 is a side cross-sectional view of another angle of the engagement of the spacing support shaft with the rotary cross shaft in an embodiment of the present invention.

The reference numerals are as follows: a base 1; the support seat 2 is rotated; a support arm 2a; a chair pole 3; a seat support 4; a seat side support 4a; a back support 5; a back support 5a; a back side support 5b; a rotating cross shaft 6; a fitting portion 7; an outer side wall 7a; a mounting base 8; a first rotating groove 9; a connecting rod 10; a torsion member 11; a limit support shaft 12; the rotating groove 13; a perforation 14; a second rotating groove 15; a sink 16; a reset spring 17; a bayonet 18; an abutment portion 19; a clamping column 20; a notch 21; rotating the connecting seat 22; a decorative cover plate 23; an axis milling plane 24; a connecting circular groove 25; dodge channel 26; a rotating arc surface 27; fulcrum a.

Detailed Description

In order that the above-recited objects, features and advantages of the present application will be more clearly understood, a more particular description of the application 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 application 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 invention, but the present invention may be practiced in other ways than those described herein, and therefore the scope of the present invention is not limited to the specific embodiments disclosed below.

In the description of the present invention, the term "at least one" refers to one or more, unless explicitly defined otherwise. The terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The present embodiment relates to reference orientations of the respective portions, with the position of the back support body as the rear end.

The specific embodiments of the present invention are as follows:

As shown in fig. 1 to 13, the present invention provides an ergonomic chair comprising a base 1 and a rotation support base 2 coupled to the rear end of the base 1; the base 1 is configured as a main body support of a seat, and the base 1 is used for being connected with a seat rod 3 of the seat bottom; the rotation support base 2 is configured to connect and support a base support body 4 and a back support body 5 of the seat; the back support body 5 is fixedly connected to the rear end of the rotary support seat 2; the seat support body 4 is arranged above the base 1, and two sides of the rear end of the seat support body 4 are respectively connected with the rotary support seat 2; a swinging device is arranged between the rear end of the base 1 and the rotary supporting seat 2, the swinging device comprises a rotary transverse shaft 6 penetrating through the base 1 along the left-right direction, a fulcrum A is formed at a position corresponding to the middle of the base 1 and the rotary transverse shaft 6, and the rotary transverse shaft 6 is in rotary fit with the fulcrum A so that the rotary transverse shaft 6 can rotate left and right relative to the base 1; both ends of the rotation cross shaft 6 penetrate through the base 1 and are connected with the rotation support seat 2, so that the rotation support seat 2 can rotate left and right relative to the base 1 through the rotation cross shaft 6, and then the back support body 5 and the seat support body 4 can be driven to swing left and right; therefore, when a user uses the seat, the seat support body 4 and the back support body 5 can correspondingly swing left and right in matching with the dynamic sitting posture change of the user, so that the seat has better flexibility and is more comfortable to use.

The specific method is as follows: as shown in fig. 3-8, the back support 5 and the seat support 4 are both in a frame structure, and the back support 5 includes a back bracket 5a at the bottom and back supports 5b respectively located at two vertical sides; the back support 5a is fixedly connected to the rear end of the rotary support seat 2, so that the back support body 5 and the rotary support seat 2 keep synchronous left-right rotation. The seat support body 4 includes seat side support bodies 4a located in both sides respectively, and the rotation support seat 2 still includes the mirror image support arm 2a that stretches out towards both sides, and the seat support body 4a of arbitrary side is connected with the support arm 2a of corresponding one side to make rotation support seat 2 can stabilize support seat support body 4a. As shown in fig. 3 and 4: at the bottom of the back side support 5b there is also a downwardly extending connecting rod 10, which connecting rod 10 is configured for connection to the rear end of the seat side support 4 a; therefore, the integrity between the back support body 5 and the seat support body 4 is better, and the back support body and the seat support body keep linkage when swinging leftwards and rightwards, so that the whole swinging effect is better.

As shown in fig. 2-8, a torsion piece 11 is arranged between the front end of the seat support body 4 and the base 1, and two ends of the torsion piece 11 are respectively connected with the seat support body 4 and the base 1; the torsion member 11 is made of spring steel sheet, so that the torsion member 11 can elastically and torsionally deform in the left-right direction; the spring steel sheet is adopted, so that the strength is high and the durability is high; the connection strength between the seat support body 4 and the base 1 can be ensured while the left and right elastic deformation is satisfied. Further, from the back to the front, the torsion member 11 is inclined obliquely upward; the lower end of the torsion piece 11 is connected with the base 1, and the upper end of the torsion piece 11 is connected with the seat support body 4; the seat support body 4 is in a picking state relative to the base 1, and the structure is simple and attractive; then, by arranging the elastic torsion piece 11 between the front end of the seat support body 4 and the base 1, the front end of the seat support body 4 can correspondingly swing while the rear end of the seat support body 4 swings along with the rotation support seat 2, so that the overall swing effect of the seat support body 4 is good; the torsion piece 11 deforms and provides elastic force for enabling the seat support body 4 to swing and reset; and the seat support body 4 is lifted up relative to the base 1, so that the seat support body 4 is lighter and more flexible when being stressed to swing left and right relative to the base 1.

As shown in fig. 5-13, the base 1 is hollow and has a receiving space, a matching part 7 is provided at the rear end of the base 1, a mounting seat 8 is provided at the middle position of the matching part 7, and a first rotating groove 9 penetrating horizontally is provided in the mounting seat 8; the height of the first rotating groove 9 in the vertical direction is larger than the diameter of the rotating cross shaft 6, and the rotating cross shaft 6 is arranged in the first rotating groove 9 in a penetrating way; and be equipped with between rotation cross axle 6 and the mount pad 8 and make rotation cross axle 6 can rotate relative mount pad 8 side-to-side's rotation structure, specifically: as shown in fig. 10-13, the rotating structure includes a limiting support shaft 12 disposed in the mounting seat 8 along the front-rear direction, and the limiting support shaft 12 is located at the middle position of the mounting seat 8; a through hole 14 is arranged at the rear end of the mounting seat 8, and the limit support shaft 12 is penetrated into the mounting seat 8 from the through hole 14. After the limiting support shaft 12 is arranged in the mounting seat 8 in a penetrating way, the limiting support shaft 12 is positioned at the lower end in the first rotating groove 9; correspondingly, a rotating groove 13 which can be in rotating fit with the limit supporting shaft 12 is correspondingly arranged at the bottom of the rotating transverse shaft 6. During installation, the rotary transverse shaft 6 is firstly arranged in the installation seat 8 in a left-right penetrating way and is positioned in the middle position of the installation seat 8; then, the limiting support shaft 12 is penetrated in the mounting seat 8 along the front-rear direction, the limiting support shaft 12 is just embedded in the rotating groove 13 and matched with the rotating transverse shaft 6, and the part of the limiting support shaft 12 in rotating contact with the rotating groove 13 forms the fulcrum A; the limiting support shaft 12 is a knurled shaft, and after the limiting support shaft 12 is arranged on the mounting seat 8 in a penetrating manner, the limiting support shaft 12 is in interference fit with the mounting seat 8; the spacing support shaft 12 adopts a knurling shaft, so that the surface of the spacing support shaft 12 is rough, and the contact friction force between the spacing support shaft 12 and the mounting seat 8 is large, thereby being capable of limiting the spacing support shaft 12 to be separated from the mounting seat 8; and, when the rotation cross shaft 6 rotates around the limit support shaft 12, a certain rotation damping exists. As shown in fig. 11 to 13, after the limit support shaft 12 is engaged with the rotation cross shaft 6, the rotation cross shaft 6 can rotate left and right around the limit support shaft 12 with the limit support shaft 12 as a "fulcrum". The limiting support shaft 12 is embedded in the rotating groove 13, so that the limiting support shaft 12 can also limit the left-right offset of the rotating transverse shaft 6, the rotating transverse shaft 6 can only swing left and right, and the swinging of the rotating transverse shaft 6 is more stable; the limiting support shaft 12 can play a role in two purposes, and the structural design is ingenious.

As shown in fig. 5-9, the outer side walls 7a at both sides of the mating portion 7 are correspondingly provided with second rotating grooves 15 through which the avoidance rotating cross shafts 6 pass, and the height of the second rotating grooves 15 in the vertical direction is greater than that of the first rotating grooves 9. The rotation cross shaft 6 takes the center position of the mounting seat 8 as a rotation point, and then the farther away from the mounting seat 8, the larger the swing distance of the rotation cross shaft 6 in the vertical direction; the second rotary groove 15 is then designed to be larger than the first rotary groove 9; the design is ingenious and consideration is given. Further, the method comprises the following steps: the two sides of the mounting seat 8 are respectively spaced from the outer side wall 7a of the matching part 7, and a sink 16 arranged along the front-rear direction is correspondingly formed at the spacing between the mounting seat 8 and the outer side wall 7a of the matching part; the two sides of the sinking groove 16 are respectively provided with a strip-shaped reset spring piece 17 arranged along the front-back direction, the front end of the reset spring piece 17 is connected with the base 1, and the rear end of the reset spring piece 17 is tilted relative to the base 1 and is positioned at the bottom of the rotating transverse shaft 6; so that when the rotary cross shaft 6 rotates downwards, the extrusion is acted on the reset spring piece 17; specifically: as shown in fig. 7 and 9, a bayonet 18 is also provided at the front lower part of the base 1 at the sink 16; the front end of the reset spring 17 is obliquely downwards inserted into the inserting bayonet 18, the upper wall surface of the inserting bayonet 18 is provided with a vertically downwards extending clamping column 20, the clamping column 20 is clamped on the reset spring 17, and the reset spring 17 is prevented from being separated from the inserting bayonet 18. The front end of the sinking groove 16 is provided with an abutting part 19, the bottom surface of the reset spring piece 17 abuts against the abutting part 19, so that the rear end of the reset spring piece 17 is in a tilting state, the reset spring piece 17 is positioned at the bottom of the rotation transverse shaft 6, and therefore when the rotation transverse shaft 6 rotates left and right, the reset spring piece 17 on the corresponding side is extruded to generate elastic deformation, so that the seat support body 4 and the back support body 5 always have good damping sense in the swinging process, and the use is comfortable; and the reset spring piece 17 can provide the reset spring force of the rotating cross shaft 6 after deformation, so that the seat support body 4 and the back support body 5 can be reset by the user after leaving the seat. Moreover, because the mounting seat 8 is just spaced from the outer side wall 7a of the matching part 7, a sinking groove for mounting the reset spring 17 can be just formed, the internal structure of the base 1 is fully utilized, and the layout is reasonable. In addition, still connect and be equipped with a decoration apron 23 in the upper end of base 1, rotate cross axle 6 and rotate the back of supporting seat 2 installation completion, decorate apron 23 and connect in base 1 upper end, can cover base 1 inner structure, hide the connection trace, beautify the outward appearance.

As shown in fig. 5-8, a notch 21 for accommodating the mating part 7 is correspondingly arranged at the front end of the rotation supporting seat 2, and rotation connecting seats 22 for connecting the rotation transverse shaft 6 are respectively formed at two sides of the notch 21; the rotary supporting seat 2 is detachably connected with the rotary transverse shaft 6, and specifically means that: as shown in fig. 6, the portion of the rotation cross shaft 6 passing through the mating portion 7 includes vertical milling planes 24 respectively disposed at the front and rear ends, and rotation cambered surfaces 27 respectively disposed at the upper and lower ends; the inner side wall of the rotary connecting seat 22 is provided with a connecting circular groove 25 which can be in rotary fit with the rotary transverse shaft 6, and an avoidance channel 26 which is communicated with the connecting circular groove 25 and is arranged along the front-back direction, and the opening of the avoidance channel 26 is positioned at the front end. And the height of the notch of the avoidance channel 26 is matched with the front-back distance between two adjacent shaft milling planes 24 on the rotation transverse shaft 6, and the height of the notch of the avoidance channel 26 is smaller than the diameter of the rotation transverse shaft 6. Then, when the rotary support seat 2 is installed, the rotary support seat 2 is required to be vertically placed so that the opening of the avoidance channel 26 faces downwards vertically, then the rotary transverse shaft 6 can enter the connection circular groove 25 through the avoidance channel 26, and after the rotary transverse shaft 6 enters the connection circular groove 25, the rotary cambered surface 27 is in rotary fit with the connection circular groove 25, and then the rotary support seat 2 can be rotated backwards to be based on the same horizontal plane with the base 1; in this position, the rotation cross shaft 6 cannot enter the avoidance channel 26 again, so that the rotation cross shaft 6 can be restricted from being separated from the connection circular groove 25; adopt above-mentioned connection structure for the connection structure between rotation supporting seat 2 and the rotation cross axle 6 is simple ingenious, can realize quick assembly disassembly. Furthermore, the matching part 7 is in a narrowed state relative to the base 1, and the width of the front end of the rotating support seat 2 is matched with the width of the base 1; after the matching part 7 is embedded in the notch 21, the base 1 and the rotary supporting seat 2 are tightly connected front and back, and the width is consistent; so that the integrity is better.

In summary, according to the ergonomic chair of the present invention, the horizontal rotation cross shaft 6 is provided in the engagement portion 7 at the rear end of the base 1, so that the rotation cross shaft 6 can swing left and right with respect to the base 1; both ends of the rotating cross shaft 6 penetrate through the base 1, and the penetrating end of the rotating cross shaft 6 is connected with the rotating support seat 2; so that the rotary supporting seat 2 can swing left and right relative to the base 1; the back support body 5 and the seat support body 4 are both connected to the rotary support seat 2, so that when a user uses the seat, the seat support body 4 and the back support body 5 can correspondingly swing left and right in matching with the dynamic sitting posture change of the user, the seat flexibility is better, and the use is more comfortable. A torsion piece 11 capable of elastically deforming left and right is arranged between the front end of the seat support body 4 and the base 1, and a reset spring piece 17 positioned at the bottom of the rotation transverse shaft 6 is also arranged in the base 1; the seat support body 4 and the back support body 5 have good damping sense in the process of swinging left and right, and the use is comfortable; and torsion piece 11 and reset shell fragment 17 can also provide elasticity after deformation for seat support body 4 and back support body 5 can reset by oneself, use more humanizedly.

Claims

1. An ergonomic chair, comprising:

a base configured to support a main body of the seat; the rear end of the base is provided with a matching part, the middle position of the matching part is provided with a mounting seat, and a first rotating groove which horizontally penetrates through the mounting seat is arranged in the mounting seat; the base is hollow, a space is formed between the two sides of the mounting seat and the outer side wall of the matching part, and a sinking groove arranged along the front-back direction is formed at the space;

The rotary supporting seat is connected to the rear end of the base; the rotary supporting seat is configured to be used for connecting and supporting a back supporting body and a seat supporting body of the seat; the back support body is fixedly connected to the rear end of the rotary support seat; the seat support body is arranged above the base, two sides of the rear end of the seat support body are respectively connected with the rotating support seat, and the seat support body is in a picking state relative to the base;

The swinging device is arranged between the rear part of the base and the rotating support seat; the swinging device comprises a rotation transverse shaft penetrating in the first rotation groove along the left-right direction, and the height of the first rotation groove in the vertical direction is larger than the diameter of the rotation transverse shaft; the base forms a fulcrum at a position corresponding to the middle of the rotating cross shaft, a rotating structure enabling the rotating cross shaft to rotate left and right relative to the mounting seat is arranged at the fulcrum, and the rotating cross shaft is matched with the rotating structure so that the rotating cross shaft can rotate left and right relative to the base; both ends of the rotating cross shaft penetrate out of the base and are connected with the rotating support seat; the rotary supporting seat synchronously rotates left and right relative to the base along with the rotary transverse shaft so as to drive the back supporting body and the seat supporting body to swing left and right;

Reset spring pieces arranged along the front-back direction are respectively arranged in the sinking grooves at the two sides of the rear end of the base, the front end of each reset spring piece is connected with the base, and the rear end of each reset spring piece is tilted relative to the base and is positioned at the bottom of the rotating transverse shaft; the rotating cross shaft rotates downwards to squeeze and act on the reset elastic piece; a torsion piece is arranged between the front end of the seat support body and the base; the torsion piece is inclined obliquely upwards from back to front; the lower end of the torsion piece is connected with the base, and the upper end of the torsion piece is connected with the base support body; the torsion piece can elastically and torsionally deform in the left-right direction, so that the rear end of the seat support body can correspondingly swing while swinging along with the rotation support seat.

2. The ergonomic chair of claim 1 wherein: the rotating structure comprises a limiting support shaft arranged in the mounting seat along the front-rear direction; the limiting support shaft is positioned at the middle position of the mounting seat, and is positioned at the lower end in the first rotating groove; correspondingly, a rotating groove which can be in rotating fit with the limiting support shaft is correspondingly formed in the bottom of the middle position of the rotating transverse shaft; the limiting support shaft is embedded in the rotating groove, the part, which is contacted with the rotating transverse shaft, of the limiting support shaft forms the fulcrum, and the rotating transverse shaft can rotate left and right around the limiting support shaft.

3. An ergonomic chair according to claim 2, characterized in that: the rear end of the matching part is provided with a perforation, and the limit supporting shaft passes through the perforation and is arranged in the mounting seat in a penetrating way; and the limiting support shaft is in interference fit with the mounting seat.

4. An ergonomic chair according to claim 2 or 3, characterized in that: the limiting support shaft is a knurled shaft.

5. The ergonomic chair of claim 1 wherein: the reset spring piece is in a long strip shape arranged along the front-back direction, an inserting bayonet is further arranged below the front of the base positioned in the sinking groove, and the front end of the reset spring piece is obliquely inserted into the inserting bayonet downwards; the front end of the sinking groove is provided with an abutting part, and the bottom surface of the reset spring piece abuts against the abutting part so that the rear end of the reset spring piece is tilted.

6. The ergonomic chair of claim 1 wherein: the outer side wall of the matching part is correspondingly provided with a second rotating groove which is penetrated by the avoidance rotating transverse shaft, and the height of the second rotating groove in the vertical direction is larger than that of the first rotating groove.

7. The ergonomic chair of claim 1 wherein: the rear end of the base is provided with a matching part, and the rotating transverse shaft is horizontally arranged in the matching part in a penetrating way; the front end of the rotary supporting seat is correspondingly provided with a notch for accommodating the matching part, and two sides of the notch are respectively provided with a rotary connecting seat for connecting a rotary transverse shaft; the matching parts are embedded in the gaps, and two sides of the rotating transverse shaft respectively penetrate out of the matching parts and are connected to the rotating connecting seat.

8. The ergonomic chair of claim 7 wherein: the rotary connecting seat is detachably connected with the rotary transverse shaft, and the part of the rotary transverse shaft penetrating out of the matching part comprises shaft milling planes which are respectively arranged at the front end and the rear end and rotary cambered surfaces which are respectively arranged at the upper end and the lower end; the inner side wall of the rotary connecting seat is provided with a connecting circular groove which can be in rotary fit with the rotary transverse shaft and an avoidance channel which is communicated with the connecting circular groove and is arranged along the front-back direction, and the opening of the avoidance channel is positioned at the front end; the height of the notch of the avoidance channel is matched with the front-back distance between two adjacent shaft milling planes on the rotation transverse shaft.

9. The ergonomic chair of claim 7 wherein: the matching part is in a narrowed state relative to the base, and the width of the front end of the rotary supporting seat is matched with the width of the base.

10. The ergonomic chair of claim 1 wherein: the torsion part is made of spring steel sheets.

11. The ergonomic chair of claim 1 wherein: the seat support body is of a frame type structure and comprises seat side support bodies respectively positioned at the left side and the right side; the rotary support seat comprises support arms which extend towards two sides in a mirror image mode, and the seat side support bodies are respectively connected with the support arms on the corresponding sides.

12. The ergonomic chair of claim 1 wherein: the back support body is of a frame structure and comprises a back support at the bottom and back side support bodies respectively vertical to two sides; the back support is fixedly connected to the rear end of the rotary support seat; the bottom of the back side support body is provided with a downward extending connecting rod, and the connecting rod is configured to be connected with the rear end of the seat support body.