CN108968466B

CN108968466B - Swivel chair

Info

Publication number: CN108968466B
Application number: CN201811130306.3A
Authority: CN
Inventors: 彭汉强
Original assignee: Zhejiang Yueqiang Furniture Technology Co Ltd
Current assignee: Zhejiang Yueqiang Furniture Technology Co Ltd
Priority date: 2018-09-27
Filing date: 2018-09-27
Publication date: 2024-07-19
Anticipated expiration: 2038-09-27
Also published as: CN108968466A

Abstract

This swivel chair seatpad, swivel chair include fixing base frame and connect two cantilevers on the fixing base frame, this seatpad is including swing base plate and buttock bedplate and swing base plate back and forth swing, inside having the confession the space that holds of swing base plate and swing base plate are located in the space, the both sides front end and the fixing base frame of swing base plate are articulated to be connected, the both sides front end and the fixing base frame of buttock bedplate are articulated to be connected, the rear end both sides of swing base plate are equipped with the restriction pin respectively, be equipped with respectively in the one end inboard that every cantilever is close to the fixing base frame supplies restriction pin one-to-one male waist type hole one, be equipped with respectively in the both sides rear end of buttock bedplate and supply restriction pin one-to-one male waist type hole two, this seatpad is still including fixing at the front bedplate of two cantilever suspended ends, be equipped with elastic connection structure between swing base plate and front bedplate.

Description

Swivel chair

Technical Field

The invention belongs to the technical field of chairs, and particularly relates to a swivel chair.

Background

Chairs are a common living article in life.

The chair comprises a bracket and a cushion fixed on the bracket, and a backrest is arranged on the bracket.

Many existing backrests have two types of fixed type and lifting type, and the lifting type backrests are adjusted in a lifting mode through screws and the like and then locked.

The lifting adjustment of the mode is complicated and the adjustment stability is poor.

Secondly, the existing backrest cannot swing left and right, and a section of the backrest, which is close to the neck, cannot independently tilt backwards, so that the use of the backrest is limited.

Disclosure of Invention

The invention aims to solve the problems and provide the swivel chair which is more convenient to adjust, better in stability and stronger in practicability.

In order to achieve the above purpose, the present invention adopts the following technical scheme: the swivel chair comprises a claw wheel assembly and a lifting device connected to the claw wheel assembly, wherein a fixed seat frame is connected to the lifting device, armrests are connected to two sides of the fixed seat frame, a backrest assembly is connected to the rear side of the fixed seat frame, the backrest assembly comprises a rectangular backrest frame, a support frame is connected to the top side of the back of the rectangular backrest frame through a triangular piece, the support frame comprises the fixed seat frame and a fixed column connected to the rear side of the fixed seat frame, a backrest support column is further included, a matching hole and a fixed column is arranged at the lower end of the backrest support column and is inserted into the matching hole, a plurality of adjusting holes are formed in the wall of the matching hole at intervals along the axial direction of the matching hole, a U-shaped elastic locking piece is inserted into one end of the fixing column, one end of the U-shaped elastic locking piece is inserted into any adjusting hole, an adjusting guide mechanism is arranged between one end of the fixing column inserted into the matching hole and the backrest support column, the upper end of the backrest support column is connected with the triangular piece through an elastic connection mechanism, and the headrest assembly is connected to the top of the rectangular backrest frame.

The claw wheel component and the lifting device are all in the prior art.

The upper two branches of the triangular piece are connected with the rectangular backrest frame through the cylindrical rubber connecting column. The U-shaped elastic locking piece is made of a metal bar in a bending mode. The design mating holes and the fixed columns can form axial guiding, and stability of lifting adjustment can be improved.

When the lifting adjustment is needed, one end of the U-shaped elastic locking piece, which is inserted into the adjusting hole under the adjustment of external force, is separated from the adjusting hole, and when the lifting adjustment is lifted to the set position, the external force is released, the corresponding end of the U-shaped elastic locking piece is forced to be inserted into the adjusting hole, so that the height adjustment of the backrest is achieved.

The designed adjusting guide mechanism can further improve the smoothness and stability of lifting adjustment.

The elastic connecting mechanism can realize independent backward inclination near the neck position, so that the use function is further enriched and the practicability is improved.

The elastic connecting mechanism comprises a columnar connecting piece made of rubber materials, a lower locating notch is formed in the upper end of a support column of the backrest and close to one side of a human body, an upper locating notch is formed in a corner of a triangular piece, the lower end of the columnar connecting piece is inserted into the lower locating notch, a lower fixed connecting structure is arranged between the columnar connecting piece and the lower locating notch, the upper end of the columnar connecting piece is inserted into the upper locating notch, an upper fixed connecting structure is arranged between the columnar connecting piece and the upper locating notch, a locating groove body axially arranged along the columnar connecting piece is formed in one face, close to the human body, of the columnar connecting piece, and an elastic block is clamped in the locating groove body, the upper end of the elastic block is clamped in the upper locating notch and fixed on the triangular piece through an upper locking piece penetrating through the columnar connecting piece, and the lower end of the elastic block is clamped in the lower locating notch and fixed at the upper end of the backrest through a lower locking piece penetrating through the columnar connecting piece of the support column. And the columnar connecting piece can realize left-right swing and backward deformation.

The bottom of the lower end of the positioning groove body is provided with a lower inclined surface which is obliquely and backwards arranged downwards, and the lower end of the elastic block is provided with a lower inclined fit surface which is fit with the lower inclined surface. The structure can further improve the elastic rebound performance of the joint and further enhance the structural strength.

The upper end of the positioning groove body is provided with an upper inclined surface which is obliquely arranged forwards and upwards, and the upper end of the elastic block is provided with an upper inclined matching surface which is matched with the upper inclined surface. The structure can further improve the elastic rebound performance of the joint and further enhance the structural strength.

One end of the elastic block inserted into the lower positioning notch is provided with a lower limiting step; one end of the elastic block inserted into the upper positioning notch is provided with an upper limit step. The structure can avoid excessive deep assembly. The outer wall of the rear side of the middle part of the elastic block is provided with a plurality of U-shaped decompression grooves which are arranged at intervals up and down. The structure can form self-protection.

The upper fixing connection structure comprises at least one upper positioning cylinder arranged in the upper positioning notch, and upper fixing holes for the upper positioning cylinders to be inserted one by one are formed in the rear side of the upper end of the elastic block. The upper locking piece passes through the upper centering locating cylinder.

The lower fixing and connecting structure comprises at least one lower positioning cylinder arranged in the lower positioning notch, and lower fixing holes for the lower positioning cylinders to be inserted one by one are formed in the rear side of the lower end of the elastic block. The lower locking piece passes through the lower centering positioning cylinder.

The adjusting and guiding mechanism comprises a guiding sliding block which is positioned in the adjusting hole and is vertically and slidably connected with the fixing column, at least one waist-shaped hole is formed in the fixing column, and at least one guiding pin which penetrates through the waist-shaped hole and is connected with the backrest supporting column is fixed on the guiding sliding block.

Through the guide pin along waist type hole removal, it can improve lift removal's ride comfort and stability, simultaneously, still further improved holistic structural strength. Alternatively, the adjusting and guiding mechanism comprises a guide rail and a sliding block structure which are connected with each other in a sliding way.

The back of the fixed column is provided with a strip-shaped groove, the guide sliding block is positioned in the strip-shaped groove, two sides of the guide sliding block are in sliding connection with the groove wall of the strip-shaped groove, and the middle part of the U-shaped elastic locking piece is attached to one surface, far away from the groove bottom of the strip-shaped groove, of the guide sliding block.

The design of the strip-shaped groove can enlarge the contact area with the guide sliding block and further improve the smoothness and stability of sliding. The U-shaped elastic locking piece can force the guide sliding block to move towards one side of a human body.

The guide sliding block comprises a rear plate and a sliding plate connected to the front surface of the rear plate, a first elastic structure contacting with the bottom of the strip-shaped groove is arranged on the sliding plate, a second elastic structure contacting with the wall of the strip-shaped groove is arranged on the sliding plate, and the middle part of the U-shaped elastic locking piece is attached to the rear surface of the rear plate.

The elastic structure I is designed, and can ensure that the U-shaped elastic locking piece is always contacted with the guide sliding block.

And the elastic structure II can provide elastic buffering and rebound after the backrest is twisted left and right.

The elastic structure I comprises cantilever type elastic pieces arranged at the upper end and the lower end of the sliding plate, a protruding part is arranged on one surface of the suspended end of each cantilever type elastic piece, which is close to the strip-shaped groove, and the protruding part is contacted with the bottom of the strip-shaped groove. The two cantilever spring plates are symmetrically arranged. The cantilever spring can ensure the elastic performance of the upper end and the lower end.

The upper end and the lower end of the rear plate are respectively provided with a yielding gap corresponding to the cantilever type elastic sheets one by one.

The designed yielding notch can ensure yielding after the cantilever spring plate is elastically deformed.

The second elastic structure comprises convex strips arranged on two sides of the sliding plate, and cantilever elastic parts are respectively arranged at two ends of each convex strip and are contacted with the bottoms of the strip-shaped grooves. The back plate is positioned between the two convex strips.

The raised strips not only improve the structural strength, but also can improve the stability of fixing the rear plate.

The waist-shaped holes are two and parallel to each other, two abdicating grooves are formed in one side, close to a human body, of the sliding plate, four groove bottoms of the four abdicating grooves are in contact with the groove bottoms of the strip-shaped grooves, and the abdicating grooves correspond to the waist-shaped holes one by one.

The structure can improve the stability of lifting adjustment and avoid the mutual circumferential rotation.

The backrest support column comprises a body with a positioning concave groove at the rear side and a cover plate for sealing the notch of the positioning concave groove, wherein the body and the cover plate form the matching hole. The structure is convenient to disassemble and assemble. The periphery of the cover plate is provided with a plurality of buckles, and the groove wall of the positioning concave groove is provided with a plurality of bayonets for the buckles to be clamped in one by one.

The headrest subassembly include the mount pad body, be equipped with the rectangular hole body of vertical setting on the mount pad body, and the lower extreme insert in the cushion pillar in the rectangular hole body is equipped with between cushion pillar and mount pad body and is used for adjusting the cushion pillar is relative the position control structure of rectangular hole body position, is connected with the head through the elastic connection spare of being made by rubber materials in the upper end of cushion pillar and leans on the frame, elastic connection spare upwards or the level sets up to human one side slope, is equipped with between the lower extreme of cushion pillar and mount pad body and is used for preventing cushion pillar stop gear that breaks away from upwards.

The designed position adjusting structure can enlarge the range of the user group. The elastic connecting part can realize left and right and backward inclination, so that the use function of the swivel chair can be further enriched and the practicability can be further improved. And the designed limiting mechanism can ensure the reliability of use.

The back cushion support is characterized in that a first positioning notch is formed in the upper end of the back cushion support, a first matching convex part clamped in the first positioning notch is formed in one end of the elastic connecting component, a second positioning notch is formed in the lower side of the head leaning frame, a second matching convex part clamped in the second positioning notch is formed in the other end of the elastic connecting component, a first fastening structure is arranged between the first matching convex part and the first positioning notch, and a second fastening structure is arranged between the second matching convex part and the second positioning notch. By adopting the structure, the structure can improve the structural strength and the stability of connection, matching and fixation, and simultaneously, the disassembly and assembly can be convenient.

The first fastening structure comprises a first positioning cylinder arranged in a first positioning notch, one end of the elastic connecting component is provided with a first positioning hole for the first positioning cylinder to be inserted, and a first fastening piece inserted into the first positioning cylinder and in threaded connection with the inner wall of the first positioning cylinder is arranged in the first positioning hole in a penetrating manner.

The fastening structure II comprises a positioning cylinder II arranged in the positioning notch II, a positioning hole II for the positioning cylinder II to be inserted is formed in the other end of the elastic connecting component, and a fastening piece II which is inserted into the positioning cylinder II and is in threaded connection with the inner wall of the positioning cylinder II is arranged in the positioning hole II in a penetrating manner.

The elastic connecting component circumference upper surface on be equipped with a plurality of intervals setting and both ends extend to the U-shaped cell body of elastic connecting component circumference both sides. The U-shaped groove body is a decompression groove, and can form stress dispersion of the U-shaped groove body.

The position adjusting structure comprises a plurality of adjusting matching grooves which are arranged on one side of the back cushion support close to a human body and are in discrete arrangement, an inverted U-shaped groove communicated with the rectangular hole body is formed on one side of the mounting seat body close to the human body, and cantilever type buckles are formed in the inverted U-shaped groove and buckled on any one of the adjusting matching grooves. The structure is convenient to adjust and fix.

The wall of the rectangular hole body is provided with a plurality of strip-shaped guide bulges which are axially arranged along the rectangular hole body.

The strip-shaped guide protrusions reduce the contact area between the rectangular hole body and the back cushion support, and can further improve the smoothness of disassembly and lifting adjustment.

The limiting mechanism comprises a cantilever type limiting block arranged at the lower end of the back cushion support, and the suspended end of the cantilever type limiting block is contacted with the end face of the lower end of the mounting seat body to prevent the back cushion support from being separated upwards. The cantilever type limiting block is an arc cantilever type limiting block.

The cantilever type limiting block has certain elastic performance, and can buffer during limiting.

The lower end of the mounting seat body is provided with a limiting notch communicated with the rectangular hole body, and when the suspended end of the cantilever type limiting block is clamped in the limiting notch, the cushion support column can be prevented from being separated upwards.

The handrail include the tube-shape post of fixing on the fixing base frame, and insert in the handrail fixed column in the tube-shape post, be equipped with the handrail board in the upper end of handrail fixed column, the tube-shape post slope set up forward, be equipped with along the ratchet of tube-shape post axial setting on the front side of the inner wall of tube-shape post, be connected with pawl and ratchet meshing through the hinge at the one end of handrail fixed column in the tube-shape post.

Adopt the slope to set up the structure of cooperation pawl and ratchet, the pawl is inserted on the ratchet by oneself and is engaged with the ratchet under the circumstances of dead weight, has realized the stability of structure to and lifting adjustment's convenience and maneuverability, the design is more reasonable and accords with the development trend of current social technology. The structure does not need to be disassembled, and the service life can be further prolonged.

The inner cylinder is arranged in the cylindrical column, the ratchet is arranged on the front inclined angle of the inner wall of the inner cylinder, the handrail fixing column is inserted in the inner cylinder, and an inclined guide structure is arranged between the handrail fixing column and the inner cylinder. The design of the inner barrel can facilitate assembly.

The inclined guide structure can further improve stability and smoothness of lifting adjustment.

The lower end of the armrest fixing column is provided with a pawl mounting groove, two ends of the hinge shaft are arranged on the groove wall of the pawl mounting groove in a penetrating manner, the pawl is positioned in the pawl mounting groove, and a swing limiting structure for preventing the pawl from excessively swinging backwards after the pawl is separated from the ratchet backwards is arranged between the pawl and the pawl mounting groove.

The mounting groove is designed, which can form protection and maximum utilization of space.

The swing limit structure can ensure the reliability of use.

The swing limit structure comprises a limit arm with one end connected with the pawl, a limit pin is arranged at one end, far away from the pawl, of the limit arm, an arc-shaped groove is formed in the groove wall of the pawl mounting groove, and the inner end of the limit pin is inserted into the arc-shaped groove.

That is, the limit pin can move along the arc-shaped groove to play two roles of guiding and limiting.

The inclined guide structure comprises a guide groove arranged at the rear side of the inner cylinder, and a guide convex rib which is clamped in the guide groove and is in clearance fit with the guide groove is arranged at the rear side of the handrail fixing column. That is, the guide rib is slidingly connected with the groove wall of the guide groove.

The upper end of the guide groove extends to the upper end of the inner cylinder and is communicated with the outside, and the lower end of the guide groove extends to the lower end of the inner cylinder. The cylindrical column is provided with a communication groove communicated with the guide groove.

The upper end of the communication groove extends to the upper end of the cylindrical column and is communicated with the outside, and the lower end of the communication groove extends to the lower end of the cylindrical column. The inner cylinder is formed by buckling two half bodies with the transverse sections of C. This construction facilitates the machining of the internal ratchet teeth and subsequent assembly.

The inclined guide structure further comprises an inner convex part arranged on the inner wall of the inner cylinder, a gap is reserved between the rear side edge of the inner convex part and the rear side edge of the inner wall of the inner cylinder, and a guide notch for the inner convex part to be clamped in is formed in the outer wall of the handrail fixing column. The structure can further improve the smoothness and stability of movement. The upper end of the armrest fixing column is provided with a blind hole body.

The handrail plate comprises a bottom plate for closing the orifice of the blind hole body, and a handrail lower shell and a handrail upper shell buckled on the handrail lower shell are arranged on the bottom plate. Connecting bolts with the upper ends in threaded connection with the armrest upper shell are arranged at the two ends of the armrest lower shell in a penetrating way. The structure is convenient for disassembly and assembly connection.

Two cantilevers on the fixing base frame are connected with a seat cushion between the two cantilevers, the seat cushion comprises a swing substrate and a hip seat plate, the swing substrate swings back and forth, a space for accommodating the swing substrate is formed in the hip seat plate, the swing substrate is located in the space, front ends of two sides of the swing substrate are hinged with the fixing base frame, front ends of two sides of the hip seat plate are hinged with the fixing base frame, limiting pins are respectively arranged on two sides of the rear end of the swing substrate, one end inner side of each cantilever close to the fixing base frame is respectively provided with a waist-shaped hole I for one-to-one insertion of the limiting pins, two side rear ends of the hip seat plate are respectively provided with a waist-shaped hole II for one-to-one insertion of the limiting pins, the seat cushion further comprises a front seat plate fixed at the suspension ends of the two cantilevers, and an elastic connection structure is arranged between the swing substrate and the front seat plate. The front hinge and the rear end can swing in the vertical direction, so that the seat cushion can swing in the vertical direction, and the use functions are enriched. By adopting the elastic connection structure, the mutual position change of the hip seat board and the front seat board can be realized, namely, the device is more in accordance with the ergonomic design and is better in use comfort, and is more in accordance with the use requirements of current people.

The elastic connection structure comprises a plurality of elastic cantilever blocks connected to the front end of the swing substrate, and a vertical spring is arranged between the lower surface of each elastic cantilever block and the front seat plate. The elastic cantilever blocks cooperate with the vertical springs, so that not only can the elastic performance of the connecting part be ensured, but also the structural strength of the connecting part can be ensured.

The hip panel above the swing substrate is arranged on the hip seat board, a first cavity is formed between the hip seat board and the hip panel, a second cavity is formed between the front seat board and the front panel, and the suspended end of the elastic cantilever block extends into the second cavity.

The buttock seat board is internally provided with a conical cavity, the upper end of the conical cavity is closed by a buttock panel, and the buttock panel and the upper end of the conical cavity are connected through a plurality of fasteners. The upper surface of the front seat board is provided with a plurality of reinforcing rib bodies which are longitudinally and transversely arranged.

The swing base plate front end both sides are equipped with the hinge pin respectively, are equipped with respectively in the front end both sides of buttock bedplate confession hinge pin one-to-one male through-hole one, be equipped with respectively in the suspension end of every cantilever confession hinge pin one-to-one male through-hole two, the hinge pin insert to in the through-hole two from the through-hole one. This structure can ensure stability of the hinge.

Compared with the prior art, the swivel chair has the advantages that:

1. When the lifting adjustment is needed, one end of the U-shaped elastic locking piece, which is inserted into the adjusting hole under the adjustment of external force, is separated from the adjusting hole, and when the lifting adjustment is lifted to the set position, the external force is released, the corresponding end of the U-shaped elastic locking piece is forced to be inserted into the adjusting hole, so that the height adjustment of the backrest is achieved.

2. The designed adjusting guide mechanism can further improve the smoothness and stability of lifting adjustment.

3. The elastic connecting mechanism can realize independent backward inclination near the neck position, so that the use function is further enriched and the practicability is improved.

Drawings

Fig. 1 is a schematic view of a swivel chair according to the present invention.

Fig. 2 is a schematic sectional view of a swivel chair according to the present invention.

Fig. 3 is an enlarged schematic view of the structure at a in fig. 2.

Fig. 4 is a schematic structural view provided by the present invention.

Fig. 5 is a schematic view of the partial explosion configuration of fig. 4.

Fig. 6 is a schematic diagram of an explosion structure of a guide slide block provided by the invention.

Fig. 7 is an enlarged schematic view of the structure at B in fig. 2.

Fig. 8 is an exploded view of the elastic connection mechanism according to the present invention.

Fig. 9 is a schematic view of a headrest assembly provided by the present invention.

Fig. 10 is a schematic view of the headrest assembly according to the present invention after being pulled out.

Fig. 11 is an exploded view of a headrest assembly provided by the present invention.

Fig. 12 is a schematic view of the structure of the handrail provided by the invention.

Fig. 13 is a schematic view of an exploded handrail structure provided by the present invention.

Fig. 14 is a schematic view of a concave-convex mating structure provided by the present invention.

FIG. 15 is a schematic view of the inner barrel according to the present invention.

Fig. 16 is a schematic view of an exploded structure of a seat cushion according to the present invention.

Fig. 17 is a schematic view of the structure of a seat cushion provided by the present invention.

Detailed Description

The following are specific embodiments of the invention and the technical solutions of the invention will be further described with reference to the accompanying drawings, but the invention is not limited to these embodiments.

As shown in fig. 1-2, the swivel chair comprises a claw wheel assembly 10 and a lifting device 20 connected to the claw wheel assembly 10, wherein a fixed seat frame a1 is connected to the lifting device 20, handrails are connected to two sides of the fixed seat frame a1, a backrest assembly is connected to the rear side of the fixed seat frame a1, specifically, the backrest assembly of the embodiment comprises a rectangular backrest frame a6, the top side of the back of the rectangular backrest frame a6 is connected with a supporting frame through a triangular piece a7, and a neck supporting frame is further connected to the triangular piece a 7.

The support frame comprises a fixed seat frame a1 and a fixed column a2 connected to the rear side of the fixed seat frame a1, and the transverse section of the fixed column a2 is rectangular.

As shown in fig. 1-4, the backrest support column a3 further comprises a backrest support column a3, a mating hole a31 is provided at the lower end of the backrest support column a3, and a fixing column a2 is inserted into the mating hole a31, specifically, the backrest support column a3 of the embodiment comprises a body a33 having a positioning recess a331 at the rear side, and a cover plate a34 closing the notch of the positioning recess a331, wherein the mating hole a31 is formed between the body a33 and the cover plate a 34.

The hole wall of the matching hole a31 is provided with a plurality of adjusting holes a32 which are axially arranged at intervals along the matching hole a31, one end of the fixing column a2 inserted into the matching hole a31 is penetrated with a U-shaped elastic locking piece a4, one end of the U-shaped elastic locking piece a4 is inserted into any adjusting hole a32, and an adjusting guide mechanism is arranged between one end of the fixing column a2 inserted into the matching hole a31 and the backrest support column a 3.

Specifically, the adjusting and guiding mechanism of the present embodiment includes a guiding slider a5 located in the adjusting hole a32 and vertically slidably connected to the fixing column a2, at least one waist-shaped hole a21 is provided on the fixing column a2, and at least one guiding pin a51 penetrating through the waist-shaped hole a21 and connected to the backrest support column a3 is fixed on the guiding slider a 5. In the optimized scheme, the two waist-shaped holes a21 are parallel to each other,

And the guide pins a51 are also provided with two guide pins and are inserted into the waist-shaped holes a21 one by one.

As shown in fig. 1 to 6, a bar-shaped groove a22 is arranged on the back surface of the fixed column a2, a guide sliding block a5 is positioned in the bar-shaped groove a22, two sides of the guide sliding block a5 are in sliding connection with the groove wall of the bar-shaped groove a22, and the middle part of the U-shaped elastic locking piece a4 is abutted against one surface, far away from the groove bottom of the bar-shaped groove a22, of the guide sliding block a 5. That is, two locking piece inserting holes are formed between the two waist-shaped holes a21 in the fixing column a2, the locking piece inserting hole located below is a blind hole, the locking piece inserting hole located above is a through hole, the lower end of the U-shaped elastic locking piece a4 is inserted into the blind hole, and the upper end of the U-shaped elastic locking piece a4 penetrates through the through hole and extends into any one of the adjusting holes a 32.

When the height needs to be adjusted, the U-shaped elastic locking piece a4 is forced to deform by external force so as to separate from the original adjusting hole a32, when the backrest support column a3 moves to a required position relative to the fixed column a2, the external force is released, and the U-shaped elastic locking piece a4 is reset and inserted into the corresponding adjusting hole a 32. When the backrest support column a3 is lifted, the guide slide block a5 is lifted synchronously, so that the smoothness and stability of lifting movement are ensured.

Specifically, the guide slider a5 of the present embodiment includes a rear plate a52 and a slide plate a53 attached to the front surface of the rear plate a52, and two connecting pins are provided between the rear plate a52 and the slide plate a 53.

The sliding plate a53 is provided with a first elastic structure contacting with the bottom of the strip-shaped groove a22, specifically, the first elastic structure in this embodiment includes cantilever spring plates a54 disposed at the upper and lower ends of the sliding plate a53, a protruding portion a55 is disposed at one side of the suspended end of each cantilever spring plate a54, which is close to the strip-shaped groove a22, and the protruding portion a55 contacts with the bottom of the strip-shaped groove a 22. The two cantilever spring plates a54 are symmetrically arranged.

Next, the upper and lower ends of the rear plate a52 are respectively provided with yielding notches a521 corresponding to the cantilever spring pieces a54 one by one.

The sliding plate a53 is provided with a second elastic structure contacted with the groove wall of the strip-shaped groove a22, and the middle part of the U-shaped elastic locking piece a4 is abutted against the rear surface of the rear plate a 52. Specifically, the second elastic structure of the present embodiment includes protruding strips a56 disposed on two sides of the sliding plate a53, and cantilever elastic portions a57 are disposed at two ends of each protruding strip a56, where the cantilever elastic portions a57 contact with the bottoms of the strip-shaped grooves a 22. The rear plate a52 is located between two convex strips a 56.

In addition, two abdicating grooves are formed on one surface of the sliding plate a53 close to a human body, four grooves are formed on one surface of the sliding plate a53, which is provided with the abdicating grooves, and the abdicating grooves are in contact with the bottoms of the strip-shaped grooves a22, and are in one-to-one correspondence with the waist-shaped holes a 21. The yielding groove reduces the contact area so as to improve the smoothness of the relative movement.

In addition, the mating hole a31 of the present embodiment is a rectangular hole, and a transverse cross section of one end of the fixing post a2 inserted into the mating hole a31 is rectangular and the rectangular holes are matched.

As shown in fig. 1-2 and fig. 7-8, the upper end of the back support column a3 is connected to the triangular piece a7 by an elastic connection mechanism a 8. Specifically, the elastic connection mechanism a8 of this embodiment includes a columnar connection member a81 made of a rubber material, a lower positioning notch a35 disposed at an upper end of the backrest support column a3 and close to one side of a human body, an upper positioning notch a71 disposed at a corner of the triangle member a7, a lower fixed connection structure disposed between the columnar connection member a81 and the lower positioning notch a35, an upper fixed connection structure disposed between the columnar connection member a81 and the upper positioning notch a71, a positioning groove a82 disposed along an axial direction of the columnar connection member a81 on a side of the columnar connection member a81 close to the human body, and an elastic block a83 disposed in the positioning groove a82, wherein the elastic block a83 is made of a metal plate.

The upper end of the elastic block a83 is clamped in the upper positioning notch a71 and is fixed on the triangular piece a7 through an upper locking piece a84 penetrating through the columnar connecting piece a81, and the lower end of the elastic block a83 is clamped in the lower positioning notch a35 and is fixed at the upper end of the backrest support column a3 through a lower locking piece a85 penetrating through the columnar connecting piece a 81.

The bottom of the lower end of the positioning groove body a82 is provided with a lower inclined surface a821 which is obliquely and backwards arranged downwards, and the lower end of the elastic block a83 is provided with a lower inclined matching surface a831 which is matched with the lower inclined surface a 821.

The upper end of the positioning groove body a82 is provided with an upper inclined surface a822 which is obliquely arranged forwards and upwards, and the upper end of the elastic block a83 is provided with an upper inclined matching surface a832 which is matched with the upper inclined surface a 822. The lower inclined surface a821 and the upper inclined surface a822 are parallel to each other.

One end of the elastic block a83 inserted into the lower positioning notch is provided with a lower limit step; an upper limit step is arranged at one end of the elastic block a83 inserted into the upper locating notch.

The outer wall of the rear side of the middle part of the elastic block a83 is provided with a plurality of U-shaped decompression grooves a833 which are arranged at intervals up and down.

The upper fixing and connecting structure comprises at least one upper positioning cylinder a72 arranged in the upper positioning notch, and upper fixing holes a86 for the upper positioning cylinders to be inserted one by one are formed in the rear side of the upper end of the elastic block a 83. The lower fixing and connecting structure comprises at least one lower positioning cylinder a36 arranged in the lower positioning notch, and lower fixing holes a87 for the lower positioning cylinders to be inserted one by one are formed in the rear side of the lower end of the elastic block a 83.

As shown in fig. 9-11, a headrest assembly is connected to the top of the rectangular backrest frame a6, the headrest assembly comprises a mounting base b1, a mounting protrusion b14 extending to one side of a human body is arranged at the lower end of the mounting base b1 for easy assembly and disassembly, and a plurality of mounting positioning holes b15 are formed in the mounting protrusion.

The mounting seat body b1 is provided with a rectangular hole body b11 which is vertically arranged, and a cushion support post b2 with the lower end inserted into the rectangular hole body b11, wherein the transverse cross section of the cushion support post b2 is rectangular and is matched with the rectangular hole body b 11.

Secondly, a plurality of strip-shaped guide protrusions b13 which are axially arranged along the rectangular hole body b11 are arranged on the wall of the rectangular hole body b 11. The cushion support b2 contacts the strip-shaped guide projection b13. An upper limit convex strip b25 is arranged at the upper end of the cushion pillar b 2.

The back cushion support b2 and the mounting seat body b1 are provided with a position adjusting structure for adjusting the position of the back cushion support b2 relative to the rectangular hole body b11, specifically, the position adjusting structure comprises a plurality of adjusting matching grooves b24 which are arranged on one surface of the back cushion support b2 close to a human body and are discretely arranged, one surface of the mounting seat body b1 close to the human body is provided with an inverted U-shaped groove b12 communicated with the rectangular hole body b11, cantilever type buckles b131 are formed in the inverted U-shaped groove b12, and the cantilever type buckles b131 are buckled on any one of the adjusting matching grooves b 24.

The upper end of the cushion support b2 is connected with a head leaning frame b4 through an elastic connecting part b3 made of rubber materials, the elastic connecting part b3 is obliquely upwards or horizontally arranged towards one side of a human body, and a limiting mechanism for preventing the cushion support b2 from being upwards separated is arranged between the lower end of the cushion support b2 and the mounting seat body b 1. Specifically, the limiting mechanism comprises a cantilever type limiting block b20 arranged at the lower end of the cushion support b2, and the cantilever type limiting block b20 can be contacted with the end face of the lower end of the mounting seat body b1 to prevent the cushion support b2 from being separated upwards.

The lower end of the mounting seat body b1 is provided with a limiting gap b10 communicated with the rectangular hole body b11, and when the suspended end of the cantilever type limiting block b20 is clamped in the limiting gap b10, the cushion support b2 can be prevented from being separated upwards.

In addition, a first positioning notch b21 is formed at the upper end of the cushion support b2, a first fitting protrusion b22 which is clamped in the first positioning notch b21 is formed at one end of the elastic connecting component b3, a second positioning notch b41 is formed at the lower side of the head leaning frame b4, a second fitting protrusion b31 which is clamped in the second positioning notch b41 is formed at the other end of the elastic connecting component b3, a first fastening structure is arranged between the first fitting protrusion b22 and the first positioning notch b21, and a second fastening structure is arranged between the second fitting protrusion b31 and the second positioning notch b 41. Further, the first fastening structure comprises a positioning cylinder b23 arranged in the positioning notch b21, a positioning hole b32 for inserting the positioning cylinder b23 is arranged at one end of the elastic connecting component b3, and a fastening piece b33 which is inserted into the positioning cylinder b23 and is in threaded connection with the inner wall of the positioning cylinder b23 is arranged in the positioning hole b32 in a penetrating manner. Further, the fastening structure II comprises a positioning cylinder II b42 arranged in the positioning notch II b41, a positioning hole II b34 for inserting the positioning cylinder II b42 is arranged at the other end of the elastic connecting component b3, and a fastening piece II b35 which is inserted into the positioning cylinder II b42 and is in threaded connection with the inner wall of the positioning cylinder II b42 is arranged in the positioning hole II b34 in a penetrating manner.

Further, a plurality of U-shaped grooves b36 are provided on the circumferential surface of the elastic connection member b3 at intervals and extend to both circumferential sides of the elastic connection member b3 at both ends. The U-shaped groove body b36 is a decompression groove.

The cantilever type buckle b131 is clamped on one of the adjusting and matching grooves b24, when the height position is required to be adjusted, the cushion support post b2 moves axially along the cushion support post under the action of external force so as to force the cantilever type buckle b131 to be separated from the adjusting and matching groove b24, and when the cantilever type buckle b131 moves to the set position, the cantilever type buckle b131 is clamped on the adjusting and matching groove b24 at the corresponding position.

As shown in fig. 12 to 15, the armrest comprises a cylindrical column c1 fixed on a fixed seat frame a1, and an armrest fixing column c2 inserted in the cylindrical column c1, wherein an armrest plate c3 is arranged at the upper end of the armrest fixing column c2, and further a blind hole body is arranged at the upper end of the armrest fixing column c 2.

The armrest plate c3 of the present embodiment includes a bottom plate c31 closing the blind hole body orifice, and an armrest lower case c32 and an armrest upper case c33 fastened to the armrest lower case c32 are mounted on the bottom plate c 31. The inner walls of the two sides of the lower handrail shell c32 are provided with concave-convex structures I34, and the inner walls of the two sides of the upper handrail shell c33 are provided with concave-convex structures II 35 matched with the concave-convex structures I. Specifically, the first concave-convex structure of the embodiment comprises a plurality of protrusions arranged at intervals, the second concave-convex structure comprises a plurality of notches arranged at intervals, and the protrusions are matched with the notches. Next, connecting bolts, the upper ends of which are screwed to the armrest upper case c33, are inserted into both ends of the armrest lower case c 32.

In the optimized scheme, the cylindrical column c1 of the embodiment is obliquely arranged forwards, the front inclined angle c11 on the inner wall of the cylindrical column c1 is provided with the ratchet c12 axially arranged along the cylindrical column c1, one end of the handrail fixing column c2 inserted into the cylindrical column c1 is connected with the pawl c5 through the hinge shaft c4, and the pawl c5 is meshed with the ratchet c 12. Pawl c5 engages ratchet c12, which forms a fixture.

Next, an inner cylinder c6 is provided in the cylindrical column c1, the ratchet c12 is provided on the front inclined slope c11 of the inner wall of the inner cylinder c6, the armrest fixing column c2 is inserted in the inner cylinder c6, and an inclined guide structure is provided between the armrest fixing column c2 and the inner cylinder c 6.

In addition, a pawl mounting groove c21 is formed in the lower end of the armrest fixing column c2, two ends of the hinge shaft c4 penetrate through the groove wall of the pawl mounting groove c21, the pawl c5 is located in the pawl mounting groove c21, and a swing limiting structure for preventing the pawl c5 from excessively swinging backwards after the pawl c5 is separated from the ratchet c12 backwards is arranged between the pawl c5 and the pawl mounting groove c 21. Specifically, the swing limiting structure comprises a limiting arm c51 with one end connected with a pawl c5, a limiting pin c52 is arranged at one end, far away from the pawl c5, of the limiting arm c51, an arc-shaped groove c22 is formed in the groove wall of the pawl mounting groove c21, and the inner end of the limiting pin c52 is inserted into the arc-shaped groove c 22.

Specifically, the inclined guiding structure of the present embodiment includes a guiding groove c61 provided at the rear side of the inner cylinder c6, and a guiding rib c23 engaged in the guiding groove c61 and in clearance fit with the guiding groove c61 is provided at the rear side of the handrail fixing column c 2. And the inclined guide structure further comprises an inner convex part c64 arranged on the inner wall of the inner cylinder, a gap is reserved between the rear side edge of the inner convex part c64 and the rear side edge c65 of the inner wall of the inner cylinder, and a guide notch c24 for the inner convex part c64 to be clamped in is arranged on the outer wall of the handrail fixing column c 2.

The guide groove c61 extends to the upper end of the inner tube c6 and communicates with the outside, and the guide groove c61 extends to the lower end of the inner tube c 6.

The cylindrical column c1 is provided with a communication groove c13 communicating with the guide groove c 61.

The upper end of the communication groove c13 extends to the upper end of the cylindrical column c1 and communicates with the outside, and the lower end of the communication groove c13 extends to the lower end of the cylindrical column c 1. The inner cylinder C6 is formed by buckling two half bodies with the transverse cross sections in a C shape. The lower end of the inner cylinder c6 is provided with a closing part c62, and a lock plunger c63 with the upper end in threaded connection with the closing part c62 is arranged at the joint of the fixed seat frame a1 and the cylindrical column c1 in a penetrating way.

In this embodiment, the armrest plate or the armrest fixing column c2 is grasped under the action of external force and is drawn upwards, the pawl c5 at this time is disengaged from the ratchet c12, and after the ratchet c5 rises to the set position, the pawl c5 at this time is meshed with the ratchet c12 under the action of self gravity, that is, the rising adjustment is completed. Otherwise, the descending adjustment is completed.

As shown in fig. 16 to 17, two cantilevers a100 on a fixed base frame a1 are connected with a seat cushion between the two cantilevers a100, the seat cushion includes a swing base plate d1 and a hip seat plate d2, and the swing base plate d1 swings back and forth, the swing base plate d1 is fixed on a lifting device, the lifting device is the prior art, and the lifting device is fixed on a universal wheel bracket.

The hip seat board d2 is internally provided with a space for accommodating the swing substrate d1, the swing substrate d1 is positioned in the space, front ends of two sides of the swing substrate d1 are hinged with the fixed seat frame a1, front ends of two sides of the hip seat board d2 are hinged with the fixed seat frame a1, specifically, two sides of the front end of the swing substrate d1 are respectively provided with a hinge pin d14, two sides of the front end of the hip seat board d2 are respectively provided with a through hole d23 for inserting the hinge pins d14 one by one, the suspension end of each cantilever a100 is respectively provided with a through hole two a102 for inserting the hinge pins d14 one by one, and the hinge pins d14 are inserted into the through holes two a102 from the through hole one d 23.

Limiting pins d3 are respectively arranged on two sides of the rear end of the swing substrate d1, waist-shaped holes a101 for the limiting pins d3 to be inserted one by one are respectively arranged on the inner side of one end, close to the fixed seat frame a1, of each cantilever a100, waist-shaped holes d21 for the limiting pins d3 to be inserted one by one are respectively arranged on the rear ends of two sides of the hip seat board d2, the seat cushion further comprises a front seat board d4 fixed at the suspension ends of the two cantilevers a100, and an elastic connecting structure is arranged between the swing substrate d1 and the front seat board d 4.

Specifically, the elastic connection structure of the present embodiment includes a plurality of elastic cantilever blocks d11 connected to the front end of the swing substrate d1, and a vertical spring d12 is provided between the lower surface of each elastic cantilever block d11 and the front seat plate d 4.

Secondly, a positioning cylinder d13 is arranged on the lower surface of the suspended end of the elastic cantilever block d11, the upper end of the vertical spring d12 is sleeved on the positioning cylinder d13, and the upper end part acts on the lower surface of the suspended end of the elastic cantilever block d 11. The upper surface of the hip seat board d2 is provided with a second positioning cylinder body d22 which corresponds to the first positioning cylinder body d13 one by one, the lower end of the vertical spring d12 is sleeved on the second positioning cylinder body d22, and the end part of the lower end acts on the upper surface of the hip seat board d 2.

The hip panel d5 above the swing substrate d1 is arranged on the hip seat board d2, a first cavity is formed between the hip seat board d2 and the hip panel d5, a front panel d6 is connected to the front seat board d4, a second cavity is formed between the front seat board d4 and the front panel d6, and the suspended end of the elastic cantilever block d11 extends into the second cavity. The upper surface of the buttock panel d5 is provided with an arc-shaped concave surface I, the upper surface of the front panel d6 is provided with an arc-shaped concave surface II, and the arc-shaped concave surface I and the arc-shaped concave surface II form an arc-shaped concave surface.

The swing substrate d1 of the present embodiment is made of a metal plate, and the elastic cantilever block d11 and the swing substrate d1 are integrally formed.

The upper surface of the elastic cantilever block d11 is provided with a reinforcing protrusion d110, and the lower surface of the elastic cantilever block d11 is provided with a recess corresponding to the reinforcing protrusion d 110. The buttocks seat board d2 and the front seat board d4 are respectively made of plastic.

In this embodiment, when the person sits on the seat cushion, the seat cushion receives gravity and the hip seat board d2 then moves downwards at this moment, and adopts the elastic connection structure, and it can play the subregion motion of preceding bedplate d4 and hip seat board d2, and the design is more reasonable and the travelling comfort is better.

Claims

1. The swivel chair comprises a claw wheel assembly (10) and a lifting device (20) connected to the claw wheel assembly (10), a fixed seat frame (a 1) is connected to the lifting device (20), armrests are connected to two sides of the fixed seat frame (a 1), a backrest assembly is connected to the rear side of the fixed seat frame (a 1), the swivel chair is characterized in that the backrest assembly comprises a rectangular backrest frame (a 6), the top side of the back of the rectangular backrest frame (a 6) is connected with a supporting frame through a triangular piece (a 7), the supporting frame comprises the fixed seat frame (a 1) and a fixed column (a 2) connected to the rear side of the fixed seat frame (a 1), the swivel chair further comprises a backrest supporting column (a 3), a matching hole (a 31) is arranged at the lower end of the backrest supporting column (a 3) and the fixed column (a 2) is inserted into the matching hole (a 31), a plurality of elastic pieces (a 32) are axially arranged at intervals along the matching hole wall of the matching hole (a 31), a U-shaped locking piece (a 4) is inserted into the matching hole (a 2) in the matching hole (a 3) and is arranged between one end of the elastic pieces (a 4 a) and one end (a 3) of the elastic piece (a) is connected to one end (a 3) of the elastic piece (a) in the elastic piece (a 3) which is connected to one end (a 3) of the elastic piece (a) through the elastic piece (a 4 a) inserted into the matching hole (a 3 a) and one end (a 3), a headrest component is connected to the top of the rectangular backrest frame (a 6);

The elastic connecting mechanism (a 8) comprises a columnar connecting piece (a 81) made of rubber materials, a lower locating notch (a 35) arranged at the upper end of a backrest support column (a 3) and close to one side of a human body, an upper locating notch (a 71) arranged at the corner of a triangular piece (a 7), the lower end of the columnar connecting piece (a 81) is inserted into the lower locating notch (a 35), a lower fixed connecting structure is arranged between the columnar connecting piece (a 81) and the lower locating notch (a 35), the upper end of the columnar connecting piece (a 81) is inserted into the upper locating notch (a 71), an upper fixed connecting structure is arranged between the columnar connecting piece (a 81) and the upper locating notch (a 71), a locating groove body (a 82) axially arranged along the columnar connecting piece (a 81) is arranged on one side of the columnar connecting piece (a 81), and an elastic block (a 83) clamped in the locating groove body (a 82), the upper end of the elastic block (a 83) is clamped in the upper locating notch (a 71) and is clamped in the upper corner of the upper locating notch (a 71) through an elastic block (a 3) and penetrates through the upper end of the columnar connecting piece (a 81) and is fixed at the lower end of the backrest support column (a 85) and passes through the lower end of the columnar connecting piece (a 85 a) and is fixed in the upper end of the supporting piece (a 3 a) and the upper end of the elastic connecting piece (a). The upper end of the positioning groove body (a 82) is provided with an upper inclined surface (a 822) which is obliquely arranged forwards and upwards, and the upper end of the elastic block (a 83) is provided with an upper inclined matching surface (a 832) which is matched with the upper inclined surface (a 822); the bottom of the lower end groove of the positioning groove body (a 82) is provided with a lower inclined surface (a 821) which is obliquely arranged backwards and downwards, and the lower inclined surface (a 821) and the upper inclined surface (a 822) are mutually parallel; one end of the elastic block (a 83) inserted into the lower positioning notch is provided with a lower limit step; an upper limit step is arranged at one end of the elastic block (a 83) inserted into the upper positioning notch; the outer wall of the rear side of the middle part of the elastic block (a 83) is provided with a plurality of U-shaped decompression grooves (a 833) which are arranged at intervals up and down.

2. Swivel chair according to claim 1, characterized in that the adjusting guide mechanism comprises a guide slide block (a 5) which is positioned in the adjusting hole (a 32) and is vertically and slidably connected with the fixed column (a 2), at least one waist-shaped hole (a 21) is arranged on the fixed column (a 2), at least one guide pin (a 51) which penetrates through the waist-shaped hole (a 21) and is connected with the backrest support column (a 3) is fixed on the guide slide block (a 5), a strip-shaped groove (a 22) is arranged on the back of the fixed column (a 2), the guide slide block (a 5) is positioned in the strip-shaped groove (a 22) and two sides of the guide slide block (a 5) are slidably connected with the groove wall of the strip-shaped groove (a 22), and the middle part of the U-shaped elastic locking piece (a 4) is attached to one surface of the guide slide block (a 5) far away from the groove bottom of the strip-shaped groove (a 22).

3. Swivel chair according to claim 1, wherein the headrest assembly comprises a mounting seat body (b 1), a rectangular hole body (b 11) arranged vertically is arranged on the mounting seat body (b 1), a back cushion support post (b 2) with the lower end inserted into the rectangular hole body (b 11), a position adjusting structure for adjusting the position of the back cushion support post (b 2) relative to the rectangular hole body (b 11) is arranged between the back cushion support post (b 2) and the mounting seat body (b 1), a head leaning frame (b 4) is connected to the upper end of the back cushion support post (b 2) through an elastic connecting part (b 3) made of rubber materials, the elastic connecting part (b 3) is arranged obliquely upwards or horizontally towards one side of a human body, and a limiting mechanism for preventing the upward detachment of the back cushion support post (b 2) is arranged between the lower end of the back cushion support post (b 2) and the mounting seat body (b 1).

4. A swivel chair according to claim 3, wherein the upper end of the cushion support (b 2) is provided with a first positioning notch (b 21), one end of the elastic connecting member (b 3) is provided with a first fitting protrusion (b 22) engaged in the first positioning notch (b 21), the lower side of the head cushion frame (b 4) is provided with a second positioning notch (b 41), the other end of the elastic connecting member (b 3) is provided with a second fitting protrusion (b 31) engaged in the second positioning notch (b 41), a first fastening structure is arranged between the first fitting protrusion (b 22) and the first positioning notch (b 21), and a second fastening structure is arranged between the second fitting protrusion (b 31) and the second positioning notch (b 41).

5. Swivel chair according to claim 1, characterized in that the armrest comprises a cylindrical column (c 1) fixed on the fixed seat frame (a 1), and an armrest fixing column (c 2) inserted in the cylindrical column (c 1), an armrest plate (c 3) is arranged at the upper end of the armrest fixing column (c 2), and the swivel chair is characterized in that the cylindrical column (c 1) is obliquely arranged forwards, a ratchet (c 12) arranged along the axial direction of the cylindrical column (c 1) is arranged on the front side inclined (c 11) of the inner wall of the cylindrical column (c 1), a pawl (c 5) is connected to one end of the armrest fixing column (c 2) inserted in the cylindrical column (c 1) through a hinge shaft (c 4), and the pawl (c 5) is meshed with the ratchet (c 12).

6. The swivel chair according to claim 5, wherein the cylindrical column (c 1) is provided with an inner cylinder (c 6), the ratchet teeth (c 12) are provided on a front inclined side (c 11) of an inner wall of the inner cylinder (c 6), the armrest fixing column (c 2) is inserted into the inner cylinder (c 6), and an inclined guide structure is provided between the armrest fixing column (c 2) and the inner cylinder (c 6).

7. Swivel chair according to claim 1, characterized in that two cantilevers (a 100) on the fixed seat frame (a 1) are connected with a seat cushion between the two cantilevers (a 100), the seat cushion comprises a swinging base plate (d 1) and a hip seat plate (d 2) and the swinging base plate (d 1) swings back and forth, the inside of the hip seat plate (d 2) is provided with a space for accommodating the swinging base plate (d 1) and the swinging base plate (d 1) is positioned in the space, the front ends of the two sides of the swinging base plate (d 1) are hinged with the fixed seat frame (a 1), the front ends of the two sides of the hip seat plate (d 2) are hinged with the fixed seat frame (a 1), the two sides of the rear end of the swinging base plate (d 1) are respectively provided with limiting pins (d 3), the inner side of one end of each cantilever (a 100) close to the fixed with the fixed seat cushion (d 1) is respectively provided with a waist-shaped hole (a 101) for the limiting pin (d 3) to be inserted one by one, the rear ends of the two sides of the hip seat plate (d 2) are respectively provided with waist-shaped limiting pins (d 3) to be inserted one by one, and the two cantilever structures (d 4) are arranged between the front ends of the cantilever seat plate (d 1) and the cantilever seat plate (d 1).

8. Swivel chair according to claim 7, characterized in that the elastic connection structure comprises several elastic cantilever blocks (d 11) connected to the front end of the swinging base plate (d 1), and a vertical spring (d 12) is provided between the lower surface of each elastic cantilever block (d 11) and the front seat plate (d 4).

9. Swivel chair according to claim 7, wherein the hip seat (d 2) is provided with a hip panel (d 5) above the swing base (d 1), a first cavity is formed between the hip seat (d 2) and the hip panel (d 5), a front panel (d 6) is connected to the front seat (d 4), and a second cavity is formed between the front seat (d 4) and the front panel (d 6); the swing base plate (d 1) front end both sides be equipped with hinge pin (d 14) respectively, be equipped with respectively in buttock bedplate (d 2) front end both sides supply hinge pin (d 14) one-to-one through-hole one (d 23), be equipped with respectively in the suspension end of every cantilever (a 100) supply hinge pin (d 14) one-to-one through-hole two (a 102), hinge pin (d 14) insert in through-hole two (a 102) from through-hole one (d 23).