CN220384665U - Improved office chair with deformation elasticity - Google Patents

Abstract

The utility model provides an improved office chair with deformation elasticity, which relates to the technical field of office chairs and comprises a first component, wherein the first component is rotationally connected with one end of a second component, the other end of the second component is connected with a third component, the third component is rotationally connected with the first component, and lifting adjusting components and backrest adjusting components are arranged on two sides of the third component; the first component, the second component and the third component are connected to form a closed loop. The detachable closed-loop connecting first component, the detachable closed-loop connecting second component and the detachable closed-loop connecting third component are arranged, when a person sits down, the first arc-shaped stressed rod and the second arc-shaped stressed rod both play roles in deformation and support due to the pressure of the person, and the acting force can enable the person to have the rebound supporting feeling, so that the person sits down very comfortably.

Description

Improved office chair with deformation elasticity

Technical Field

The utility model relates to the technical field of office chairs, in particular to an improved office chair with deformation elasticity.

Background

Along with the development of technology, more and more work needs to be completed in office operation, so people have higher and higher requirements on office chairs, and many office chairs now have adjustable functions, including adjusting height and inclination, and the like, in order to make users sit comfortably, many office chairs can add many ergonomic design elements at the position of a chassis when equipment for users do not feel tired for long-term use, and the design elements are very comfortable when being used at the beginning, but because the structure is more, installation and debugging can take more time, and after the use is long, users can have bad experiences as well as the elasticity disappears and changes, so if one design is durable, the installation is simple, and the office chair structure with strong applicability is very important for the industry.

The technical contents disclosed in the Chinese patent document (application number: CN202122357989.X patent name: a novel office chair chassis and office chair) are as follows: the utility model discloses a novel office chair chassis and an office chair, which comprise a chair surface, wherein a filling layer is arranged in the chair surface, a spring rod is arranged below the filling layer, the same connecting blocks are arranged on two sides of the spring rod, a spring is arranged below the connecting blocks, the other end of the spring is arranged at the bottom of the chair surface, an extension plate is arranged at the bottom of the chair surface, a rotating shaft is arranged at the joint of the extension plate and the chair surface, an electric cylinder is arranged at the other end of the extension plate, a first telescopic rod is arranged on the electric cylinder, a buffer plate is arranged at the other end of the first telescopic rod, and the filling layer can be filled with soft materials to ensure that the comfort degree of the chair is better.

According to the embodiment, the filling layer and the springs are arranged on the office chair chassis, so that a user sits down with soft and comfortable feeling, but the elasticity of the filling layer or the springs is weakened after the office chair is used for a long time, so that the experience of the user is greatly reduced, the springs and the fillers are complex in installation, the working procedures are more, and the office chair is time-consuming and labor-consuming for installation personnel.

Disclosure of Invention

The utility model provides an improved office chair with deformation elasticity, which can overcome the defects of the prior art in the background technology.

In order to solve the technical problems, the utility model is realized by the following technical scheme:

an improved office chair with deformation elasticity comprises a first component, wherein the first component is rotationally connected with one end of a second component, the other end of the second component is connected with a third component, the third component is rotationally connected with the first component, and the first component is connected with a backrest;

the first component, the second component and the third component are connected to form a closed loop.

Still further, the first member, the second member, and the third member are detachably connected.

Further, lifting adjusting components and backrest adjusting components are arranged on two sides of the third component, the lifting adjusting components are connected with control bases, and the backrest adjusting components are connected with and control the backrest.

Still further, the first part includes first connecting seat and second connecting seat, the first connecting seat includes first connecting hole, the second connecting seat includes the second connecting hole, the second part includes the third connecting seat, the third connecting seat includes third connecting hole and third spread groove, the second part includes first arc atress pole, the third connecting seat is in the one end of first arc atress pole, the other end of first arc atress pole includes the second part inserted bar, the third spread groove with the second connecting seat is pegged graft together, the second connecting hole with the coaxial rotation of third connecting hole is connected, the second connecting hole with the equal coaxial grafting of third connecting hole has rotatory basic shaft, it has the TPE soft block to peg graft on the rotatory basic shaft, the TPE soft block includes the soft block jack, the soft block jack with the second connecting hole the third connecting hole is coaxial, one end of TPE soft block with first part is in the same place, the other end with the TPE soft block is pegged graft together with the second part.

Still further, the third part includes the fourth connecting seat, the fourth connecting seat includes the fourth connecting hole, the third part includes the second arc atress pole, the one end of second arc atress pole with the fourth connecting seat is connected, the other end of second arc atress pole is connected with the third part socket, the fourth connecting hole with first connecting hole coaxial rotation is connected, the third part socket with the second part inserted bar is pegged graft together, the first connecting seat includes first spread groove, the fourth connecting seat rotate peg graft in the inside of first spread groove.

Still further, the third part includes the third part closed loop and connects, the both ends that the third part closed loop was connected all with the fourth connecting seat is connected, the third part closed loop is connected the fourth connecting seat, the second arc atress pole with third part socket connection forms a closed loop, third part upper cover has been cup jointed to the both sides top of third part, the third part includes third part strengthening rib.

Still further, lift adjustment subassembly includes the lift switch, the lift wire is connected to the lift switch, lift starting piece is connected to the other end of lift wire, lift starting piece includes the start-up pivot, the start-up pivot with the second part links together, the second part includes the foot rest mounting hole, the both ends of start-up pivot are provided with lift wire connection position and start-up button respectively, start-up button is located directly over the foot rest mounting hole, lift wire connection position is connected the lift wire.

Still further, back regulation subassembly includes swing switch, swing switch includes the swing button base, the swing button base rotates and connects the swing button pivot, swing button pivot and swing button rigid coupling are in the same place, including a plurality of location pearl hole on the swing button, be provided with the location pearl on the swing button base, the location pearl with a plurality of the location pearl hole cup joints, swing button connects the swing wire, swing starting piece is connected to the other end of swing wire, swing starting piece includes the swing basal hole, swing basal hole rotates and pegs graft and has the swing pivot, the swing pivot with the second part is connected, the both sides of swing basal hole are provided with wire hookup location and swing fixture block respectively, the wire hookup location with swing wire is connected, the lower extreme of first part is close to second part department is provided with back swing locking position, the swing fixture block with back swing locking position activity joint.

Still further, the back includes first part installation position and waist support connecting hole, first part includes the back hookup location, the back hookup location with first part installation position is pegged graft together, waist support connecting hole peg graft has the waist to lean on, the waist is leaned on including the waist back board, including waist in the middle of the waist back board and lean on the regulating groove from top to bottom, waist lean on regulating groove sliding connection waist and lean on the regulating seat, waist lean on the regulating seat and including adjusting seat spliced pole, it is in to adjust seat spliced pole sliding connection waist lean on the regulating groove from top to bottom the inside, the one end of adjusting seat spliced pole is connected with the regulating groove lid, the waist lean on the regulating seat keep away from one end and the waist lean on the installation base and be connected with waist and lean on rotatory handle, waist lean on rotatory handle with waist lean on the regulating seat and be connected.

Furthermore, the foot seat comprises a lifting column, the lower end of the foot seat is connected with a plurality of universal wheels, and the lifting column is spliced with the foot seat mounting hole.

Compared with the prior art, the utility model has the beneficial effects that:

the utility model provides an improved office chair with deformation elasticity, which is provided with a first part, a second part and a third part which are connected together in a detachable closed loop, wherein the second part is provided with a first arc-shaped stress rod, the third part is provided with a second arc-shaped stress rod, the first part is rotationally connected with the second part, the first part is rotationally connected with the third part, when a person sits down, the first arc-shaped stress rod and the second arc-shaped stress rod both play the roles of deforming and supporting due to the pressure of the person, the acting force can enable the person to have the feeling of rebound supporting, so the sitting is very comfortable, and the rotational connection among the three parts enables slight rotational gaps to be formed among the three parts, so the office chair has a certain degree of deformation freedom, avoids rigid countermeasures, and increases the durability of the product. The adjusting component is arranged, so that a user can conveniently adjust the lifting of the chair and the front and back of the backrest, and each person can adjust the favorite angle. The three parts are easy and convenient to assemble and disassemble, are friendly to the workers for installation, and are comfortable to use and durable for the users, so that the product has high market value.

Drawings

FIG. 1 is an overall view of an office chair;

FIG. 2 is an exploded view of an office chair;

FIG. 3 is an exploded view of the lumbar support;

FIG. 4 is a first assembly view of the first, second and third components;

FIG. 5 is a first exploded view of the first, second and third components;

FIG. 6 is a second exploded view of the first, second and third components;

FIG. 7 is a second assembly view of the first, second and third components;

FIG. 8 is a first component schematic;

FIG. 9 is a second component schematic;

FIG. 10 is a third component schematic;

FIG. 11 is a schematic view of a second component in combination with a lift adjustment and back adjustment assembly;

FIG. 12 is an exploded view of the second component in combination with the lift adjustment and back adjustment assembly;

FIG. 13 is a schematic view of a lift adjustment assembly and a back rest adjustment assembly;

fig. 14 is a schematic view of a back adjustment assembly.

In the figure: 1. a first component; 101. a first connection base; 1011. a first connection hole; 1012. a first connection groove; 102. a second connecting seat; 1021. a second connection hole; 103. a rear swing locking position; 104. a backrest connecting position; 2. a second component; 201. a third connecting seat; 2011. a third connection hole; 2012. a third connecting groove; 202. a first arc-shaped stress rod; 203. a second component plunger; 204. a rotating base shaft; 205. TPE soft blocks; 2051. a soft block jack; 206. a foot mount hole; 3. a third component; 301. a fourth connecting seat; 3011. a fourth connection hole; 302. a second arc-shaped stress rod; 303. a third component socket; 304. the third component is connected in a closed loop; 305. a third component upper cover; 306. a third component stiffener; 307. adjusting the installation position; 4. a backrest; 401. lumbar support connecting holes; 402. a first component mounting location; 5. a waist rest; 501. a lumbar support plate; 5011. a waist rest up-down adjusting groove; 502. adjusting a groove cover plate; 503. a lumbar support adjusting seat; 5031. adjusting the seat insert column; 504. a lumbar support mounting base; 5041. a lumbar support rotating handle; 6. a lifting adjusting component; 601. a lifting switch; 602. lifting the lead; 603. a lifting starting piece; 6031. starting a rotating shaft; 6032. a wire connection site; 6033. starting a key; 7. a backrest adjustment assembly; 701. a swing switch; 7011. a swing button rotating shaft; 7012. a swing button; 70121. positioning the bead holes; 7013. positioning beads; 7014. a swing button base; 702. swinging the wire; 703. swinging the starting piece; 7031. a swing base hole; 7032. a wire connection site; 7033. swinging the clamping block; 7034. swinging the rotating shaft; 8. a foot stand; 801. lifting columns; 802. and a universal wheel.

Detailed Description

The preferred embodiments of the present utility model will be described below with reference to the accompanying drawings, it being understood that the preferred embodiments described herein are for illustration and explanation of the present utility model only, and are not intended to limit the present utility model.

As shown in fig. 1 to 14, an improved office chair with deformation elasticity comprises a first component 1, wherein the first component 1 is rotatably connected with one end of a second component 2, the other end of the second component 2 is connected with a third component 3, the third component 3 is rotatably connected with the first component 1, and the first component 1, the second component 2 and the third component 3 are connected into a closed loop. The two sides of the third component 3 comprise adjusting installation positions 307, the adjusting installation positions 307 on the two sides are respectively connected with a lifting adjusting component 6 and a backrest adjusting component 7, the lifting adjusting component 6 is used for being connected with a control foot seat 8, the height of the whole chair can be adjusted, the backrest adjusting component 6 is used for being connected with a control backrest 4, and the front and back angles of the backrest 4 of the chair can be adjusted.

The second part 2 is provided with first arc atress pole 202, the third part 3 is provided with second arc atress pole 302, first part 1 rotates with second part 2 to be connected, first part 1 rotates with third part 3 again to be connected, when the people sits down, because people's pressure, first arc atress pole 202 and second arc atress pole all play the effect of deformation and support, this effort can let the people have the sense of resilience support, consequently sit very comfortable, and the rotation connection between the three parts makes again has slight rotation clearance between the three, even the live time is difficult for deformation for a long time, the dismouting of three part is also very simple and convenient, be very friendly for the workman of installation, and for the user, not only use comfortablely, durable moreover, therefore this product possesses very high market value.

The first component 1, the second component 2 and the third component 3 are detachably mounted, so that although a certain component is damaged in the use process, the component can be replaced, and the space can be saved for transportation.

The first member 1 includes a first connection base 101 and a second connection base 102, the first connection base 101 includes a first connection hole 1011, and the second connection base 102 includes a second connection hole 1021. The second component 2 includes a third connecting seat 201, the third connecting seat 201 includes a third connecting hole 2011 and a third connecting groove 2012, the second component 2 includes a first arc-shaped stress rod 202, the third connecting seat 201 is at one end of the first arc-shaped stress rod 202, and the other end of the first arc-shaped stress rod 202 includes a second component insert rod 203. The third connecting groove 2012 is inserted into the second connecting seat 102, and the second connecting hole 1021 is coaxially and rotatably connected with the third connecting hole 2011. The second connecting hole 1021 and the third connecting hole 2011 are both coaxially inserted with the rotating base shaft 204, the rotating base shaft 204 is inserted with the TPE soft block 205, the TPE soft block 205 comprises a soft block insertion hole 2051, the soft block insertion hole 2051 is coaxial with the second connecting hole 1021 and the third connecting hole 2011, one end of the TPE soft block 205 is inserted with the first component 1, the other end of the TPE soft block 205 is inserted with the second component 2, and the TPE soft block 205 has a certain elasticity and plays a supporting role when being used for assisting human body to lean backwards, so that the leaning backwards experience is better, the human body is softer when leaning backwards, and the chair back is not perceived to be suddenly and then to fall down.

The third component 3 comprises a fourth connecting seat 301, the fourth connecting seat 301 comprises a fourth connecting hole 3011, the third component 3 comprises a second arc-shaped stressed rod 302, one end of the second arc-shaped stressed rod 302 is connected with the fourth connecting seat 301, the other end of the second arc-shaped stressed rod 302 is connected with a third component socket 303, the fourth connecting hole 3011 is coaxially and rotatably connected with the first connecting hole 1011, and the third component socket 303 is spliced with the second component inserted rod 203. Therefore, the second part 2 is rotationally connected with the first part 1, the first part 1 is rotationally connected with the third part 3, and the second part 2 and the third part 3 are spliced together, so that when a person sits down, the chassis is pressed, a deformation gap can be formed between the parts due to the rotational connection, and the first arc-shaped stress rod 202 and the second arc-shaped stress rod 302 also provide a deformation rebound effect, so that the durability of the base is greatly improved.

The first connecting seat 101 comprises a first connecting groove 1012, the fourth connecting seat 301 is rotationally inserted into the first connecting groove 1012, the first component 1 and the third component 3 are more firmly installed due to the design, the first component 1 and the third component 3 cannot be displaced left and right, and the whole structure is more accurate and smart.

The third component 3 includes a third component closed loop connection 304, two ends of the third component closed loop connection 304 are connected with the fourth connecting seats 301, in this embodiment, two ends of the third component closed loop connection 304 are connected with two fourth connecting seats 304, the other end of the fourth connecting seat 304 is connected with a second arc-shaped stress rod 302, the other end of the second arc-shaped stress rod 302 is connected with a third component socket 303 to form a closed loop, a third component upper cover 305 is sleeved above two sides of the third component 3, and the third component 3 includes a third component reinforcing rib 306. Therefore, the structure of the whole third component 3 is more stable, the middle part of the second arc-shaped stress rod 302 is arched more than two ends, so that when a person sits down, two sides of the thigh are provided with the surrounded feeling, and the parts of the buttocks and the thighs connected with the shanks are slightly lower than the middle part of the thighs, so that the whole person sits down and feels quite stable and has a safe feeling, and the structure of the whole chassis enables the chassis to have certain elasticity, thereby further increasing the comfort level of sitting down of the person.

The backrest adjusting assembly 7 comprises a swing switch 701, the swing switch 701 comprises a swing button base 7014, the swing button base 7014 is rotationally connected with a swing button rotating shaft 7011, the swing button rotating shaft 7011 is fixedly connected with a swing button 7012, a plurality of positioning ball holes 70121 are formed in the swing button 7012, positioning balls 7013 are arranged on the swing button base 7014, when the backrest 4 needs to be adjusted, the swing button 7012 is broken off, and then the swing button 7012 rotates along the swing button rotating shaft 7011, so that the positioning balls 7013 are sleeved with different positioning ball holes 70121, and the backrest 4 can be fixed in a certain gear after the positioning balls 7013 are sleeved.

The swinging button 7012 is connected with the swinging wire 702, the other end of the swinging wire 702 is connected with the swinging starting piece 703, the swinging starting piece 703 comprises a swinging base hole 7031, the swinging base hole 7031 is rotatably inserted with a swinging rotating shaft 7034, the swinging rotating shaft 7034 is connected with the second component 2, wire connection positions 7032 and swinging clamping blocks 7033 are respectively arranged on two sides of the swinging base hole 7031, a rear swinging locking position 103 is arranged at the lower end of the first component 1 close to the second component 2, when the swinging switch 701 is pressed, the swinging wire 702 is pulled, the other end of the swinging wire 702 pulls the swinging starting piece 703, the swinging clamping blocks 7033 of the swinging starting piece 703 are clamped between the rear swinging locking position 103 and the second component 2, no gap is reserved between the rear swinging locking position 103 and the second component 2, when the swinging clamping blocks 7033 are pulled away by the swinging wire 702, an adjustable angle is reserved between the rear swinging locking position 103 and the second component 2, and the gap is still reserved between the rear swinging clamping blocks 7033 and the second component 2 after adjustment is completed.

The lifting adjusting assembly 6 comprises a lifting switch 601, the internal structure of the lifting switch 601 is consistent with that of the swinging switch 701, therefore, details are omitted, the lifting switch 601 is connected with a lifting wire 602, the other end of the lifting wire 602 is connected with a lifting starting piece 603, the lifting starting piece 603 comprises a starting rotating shaft 6031, the starting rotating shaft 6031 is connected with the second component 2, the second component 2 comprises a foot seat mounting hole 206, two ends of the starting rotating shaft 6031 are respectively provided with a lifting wire connecting position 6032 and a starting key 6033, the starting key 6033 is located right above the foot seat mounting hole 206, the lifting wire connecting position 6032 is connected with the lifting wire 602, when the lifting switch 601 is pressed, the lifting wire 602 is pulled, the lifting wire connecting position 6032 is pulled, then the starting key 6033 acts and is pressed to a lifting cylinder located in the foot seat 8 right below the foot seat mounting hole 206, and therefore the foot seat 8 can be controlled to lift.

The backrest 4 comprises a first component mounting position 402 and a lumbar support connecting hole 401, the first component 1 comprises a backrest connecting position 104, the backrest connecting position 104 and the first component mounting position 402 are inserted together, the lumbar support connecting hole 401 is inserted with a lumbar support 5, the lumbar support 5 comprises a lumbar support plate 501, one side of the lumbar support plate 501, which is close to a human body, is in an inner arc shape, and can be well attached to the lumbar curve of the human body, a lumbar support up-down adjusting groove 5011 is formed in the middle of the lumbar support plate 501, the lumbar support up-down adjusting groove 5011 is slidingly connected with a lumbar support adjusting seat 503, the lumbar support adjusting seat 503 comprises an adjusting seat inserting column 5031, one end of the adjusting seat inserting column 5031 is connected with an adjusting groove cover plate 502, one end of the lumbar support adjusting seat 503, which is far away from the lumbar support plate 501, is connected with a lumbar support rotating handle 5041 in a rotating mode, the lumbar support rotating handle 5041 is connected with the lumbar support adjusting seat 503, and therefore the lumbar support 5 can be adjusted in a rotating mode relative to the backrest 4 in a vertical mode.

The foot stand 8 comprises a lifting column 801, the lower end of the foot stand 8 is connected with a plurality of universal wheels 802, and the lifting column 801 is spliced with the foot stand mounting holes 206.

Finally, it should be noted that: although the present utility model has been described in detail with reference to the embodiments, it should be understood that the utility model is not limited to the preferred embodiments, but is capable of modification and equivalents to some of the features described in the foregoing embodiments, but is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims (8)

1. An improved office chair with deformation elasticity is characterized by comprising a backrest, wherein the backrest is connected with a first component, the first component is rotatably connected with one end of a second component, the other end of the second component is connected with a third component, and the third component is rotatably connected with the first component;

the first component, the second component and the third component are connected to form a closed loop;

the first component comprises a first connecting seat and a second connecting seat, the first connecting seat comprises a first connecting hole, the second connecting seat comprises a second connecting hole, the second component comprises a third connecting seat, the third connecting seat comprises a third connecting hole and a third connecting groove, the second component comprises a first arc-shaped stressed rod, the third connecting seat is arranged at one end of the first arc-shaped stressed rod, the other end of the first arc-shaped stressed rod comprises a second component inserting rod, the third connecting groove is inserted with the second connecting seat, the second connecting hole and the third connecting hole are coaxially and rotatably connected, the second connecting hole and the third connecting hole are coaxially inserted with a rotating base shaft, a TPE soft block is inserted on the rotating base shaft, the TPE soft block comprises a soft block inserting hole, the soft block inserting hole and the second connecting hole are coaxial, the third connecting hole are coaxial, one end of the TPE soft block is inserted with the first component, and the other end of the TPE soft block is inserted with the second component;

the third part includes the fourth connecting seat, the fourth connecting seat includes the fourth connecting hole, the third part includes the second arc atress pole, the one end of second arc atress pole with the fourth connecting seat is connected, the other end of second arc atress pole is connected with the third part socket, the fourth connecting hole with coaxial rotation of first connecting hole is connected, the third part socket with the second part inserted bar is pegged graft together, the first connecting seat includes first spread groove, the fourth connecting seat rotate peg graft in the inside of first spread groove.

2. An improved office chair with deformation resilience according to claim 1, wherein the first, second and third members are detachably connected.

3. An improved office chair with deformation elasticity according to claim 1, wherein the third component is provided with a lifting adjusting component and a backrest adjusting component on two sides, wherein the lifting adjusting component is connected with a control foot seat, and the backrest adjusting component is connected with and controls the backrest.

4. The improved office chair with deformation elasticity according to claim 1, wherein the third component comprises a third component closed loop connection, two ends of the third component closed loop connection are connected with the fourth connecting seat, the third component closed loop connection and the fourth connecting seat are connected, the second arc-shaped stress rod and the third component socket are connected to form a closed loop, a third component upper cover is sleeved on the upper sides of two sides of the third component, and the third component comprises a third component reinforcing rib.

5. An improved office chair with deformation elasticity according to claim 3, wherein the lifting adjusting assembly comprises a lifting switch, the lifting switch is connected with a lifting wire, the other end of the lifting wire is connected with a lifting starting piece, the lifting starting piece comprises a starting rotating shaft, the starting rotating shaft is connected with the second component, the second component comprises a foot seat mounting hole, two ends of the starting rotating shaft are respectively provided with a lifting wire connecting position and a starting key, the starting key is located right above the foot seat mounting hole, and the lifting wire connecting position is connected with the lifting wire.

6. The improved office chair with deformation elasticity according to claim 3 or 5, wherein the backrest adjusting assembly comprises a swing switch, the swing switch comprises a swing button base, the swing button base is rotatably connected with a swing button rotating shaft, the swing button rotating shaft is fixedly connected with the swing button, the swing button comprises a plurality of positioning bead holes, the swing button base is provided with positioning beads, the positioning beads are sleeved with the positioning bead holes, the swing button is connected with a swing wire, the other end of the swing wire is connected with a swing starting piece, the swing starting piece comprises a swing base hole, the swing base hole is rotatably connected with a swing rotating shaft in a plugging manner, the swing rotating shaft is connected with the second component, two sides of the swing base hole are respectively provided with a wire connecting position and a swing clamping block, the wire connecting position is connected with the swing wire, the lower end of the first component is close to the second component and is provided with a rear swing locking position, and the swing clamping block is movably clamped with the rear swing locking position.

7. The improved office chair with deformation elastic force according to any one of claims 1 to 5, wherein the backrest comprises a first component mounting position and a lumbar support connecting hole, the first component comprises a backrest connecting position, the backrest connecting position and the first component mounting position are plugged together, the lumbar support connecting hole is plugged with a lumbar support, the lumbar support comprises a lumbar support plate, a lumbar support up-down adjusting groove is formed in the middle of the lumbar support plate, the lumbar support up-down adjusting groove is slidingly connected with a lumbar support adjusting seat, the lumbar support adjusting seat comprises an adjusting seat plug post, one end of the adjusting seat plug is connected with an adjusting groove cover plate, one end of the lumbar support adjusting seat away from the lumbar support plate is connected with a lumbar support mounting base, one end of the lumbar support mounting base away from the lumbar support adjusting seat is rotationally connected with a lumbar support rotating handle, and the lumbar support rotating handle is connected with the lumbar support adjusting seat.

8. The improved office chair with deformation elastic force according to claim 5, wherein the foot rest comprises a lifting column, the lower end of the foot rest is connected with a plurality of universal wheels, and the lifting column is spliced with the foot rest mounting hole.