CN209219613U - A kind of office chair - Google Patents

Abstract

The utility model relates to a kind of office chairs, including seat and seat support component, and the seat support component includes chassis；The seat includes: the upper plate for connection cushion, and the lower plate below upper plate, upper plate and lower plate are to being combined and be connected by fastener, the middle part fovea superior of the lower plate forms the first accommodating area, the two sides of first accommodating area form down convex occlusion part, and chassis is completely or partially arranged in the first accommodating area.By the way that a lower plate is arranged, lower plate can be according to preset shape, the separately machined molding of size, and fovea superior forms the first accommodating area in the middle part of lower plate, chassis is assemblied in the first accommodating area, and the first accommodating area two sides are because difference in height forms occlusion part, installing rear chassis can be hidden in occlusion part completely or partially, so that office chair integrally seems relatively beautiful.

Description

A kind of office chair

Technical field

The utility model relates to chair more particularly to a kind of office chairs.

Background technique

Office chair refers in routine work and social activities to be the work conveniently various chairs of outfit.Present social work Pressure is big, works heavy, therefore more stringent requirements are proposed to the comfort of office chair.

The patent of Patent No. 01126410.1 disclose it is a kind of with the office chair of function of lying is sat, with sleeve pipe structure Seat extension, include extension inner and outer tubes, wherein extend inner tube connect with seat extended surface supporting leg, outer tube and chair top phase Even, when needing rest, can will extend after inner tube trails, foot can rest on seat extended surface supporting leg, to obtain preferably Rest.But this office chair, when collapsing, seat extended surface supporting leg can protrude from seat bottom surface, very unsightly.Except this Except, the seat bottom surface of this office chair is plane, and is directly installed on chassis, and chassis is completely exposed outside, to office The aesthetics of chair entirety impacts.

The utility model patent of Patent No. " 201420463332.9 " discloses a kind of rota-cline seat with flexible heel brace, Including adjusting chassis 1, chair leg 2, the chair back 3 and seat 4, adjusts chassis 1 and fixed including tray rack 11, chair back fixed frame 12, seat Frame 13, retaining mechanism 14 and seat synchronous regulation mechanism, chair back fixed frame 12 are rotatably installed on tray rack 11, chair leg 2, chair Back 3, seat 4 are fixed with tray rack 11, chair back fixed frame 12, seat fixed frame 13 respectively, are equipped with telescopic leg below seat Support mechanism, telescopic leg support mechanism include the first guide rod, the second guide rod, the first guide rod seat, the second guide rod seat, heel brace plate, first turn Dynamic seat and the second rotation seat, the first guide rod, the second guide rod are arranged in parallel, and sliding is pacified respectively in parallel for the first guide rod, the second guide rod On the first guide rod seat, the second guide rod seat, heel brace plate is rotatably installed in the first guide rod seat, on the second guide rod seat.This is practical After the expansion of Novel pin fagging, support distances are longer, compact-sized when heel brace plate is shunk.In the utility patent, the first guide rod, Two guide rods be located at adjust chassis 1 the left and right sides, the utility patent the problem is that: adjust chassis 1 be connected to seat 4 Bottom surface on, specifically, seat 4 is fixed with tray rack 11, chair back fixed frame 12, seat fixed frame 13 respectively, in this way adjusting Chassis 1 is most of to be externally exposed, and equally, telescopic leg support mechanism is in contraction state, and is exposed, therefore influences whole chair Aesthetic measure.

The utility model patent of the applicant's Patent No. " 201621375533.9 " discloses a kind of chair convenient for rest Son, including seat, the drawing and pulling type being set on the seat leg rest regulating mechanism and putting for leg rest regulating mechanism front end is set Foot pillow, the first half of the seat is provided with accommodation space, and when leg rest regulating mechanism is in receiving state, leg rest pillow is complete It collapses in accommodation space.By the way that accommodation space is arranged on seat, when leg rest regulating mechanism is in rounding state, leg rest pillow It collapses in accommodation space completely, appearance can only apparently find out whole seat, and cannot make out leg rest regulating mechanism and leg rest Pillow, appearance are simple and beautiful.Although concealing leg rest pillow to a certain extent, chassis is installed on seat bottom surface, and most of It is still not perfect outside being exposed to.

Summary of the invention

In order to solve the above technical problems, the purpose of the utility model is to provide one kind completely or partially to hide The office chair on chassis；Chassis can be completely or partially hidden in seat bottom by the office chair, be conducive to improve exterior appearance degree；Again Further the office chair has concealed leg rest portion and leg rest regulating mechanism again simultaneously, this makes office chair integrally and have higher Overall aesthetic degree.

In order to achieve the above purpose, the utility model uses technical solution below:

Office chair, including seat and seat support component, the seat support component includes chassis；The seat It include: the upper plate for connection cushion, and the lower plate below upper plate, upper plate and lower plate are to being combined And be connected by fastener, the middle part fovea superior of the lower plate forms the first accommodating area, and the two sides of the first accommodating area are formed down Convex occlusion part, chassis are completely or partially arranged in the first accommodating area.

By being arranged a lower plate, lower plate can be according to preset shape, the separately machined molding of size, and in lower plate Portion's fovea superior forms the first accommodating area, and chassis is assemblied in the first accommodating area, and the first accommodating area two sides are because difference in height forms Occlusion part, installing rear chassis can be hidden in occlusion part completely or partially, so that office chair integrally seems relatively beautiful.

Preferably, the top surface of the first accommodating area constitutes plate-like portion, the plate-like portion is integrally formed with occlusion part.Plate Shape portion and occlusion part are integrally formed, and are produced, are installed more convenient, and intensity is more preferable.

Preferably, the plate-like portion is affixed with upper plate, the chassis passes through plate-like portion by screw and connects Upper plate.The thickness of chassis carrier is increased in this way, and the installation on chassis can be made more solid and reliable.

Preferably, the occlusion part respectively forms the zones of extensibility with curved surfaces to extension at left and right sides of seat, The thickness of lower plate is gradually thinning to zones of extensibility by occlusion part.Corner angle can be reduced to the greatest extent in this way, meet beautiful requirement.

Preferably, the office chair further includes handrail, the handrail has handrail installation portion, the shape on zones of extensibility At there is handrail installing zone, the handrail installation portion is fixed in handrail installing zone.Handrail installation portion is tight by screw etc. Firmware is installed in handrail installing zone, and screw is screwed into stronger reliable in upper plate across zones of extensibility.

Preferably, plate-like portion with a thickness of 2mm-8mm, occlusion part with a thickness of 15mm-30mm, zones of extensibility with a thickness of 10mm-30mm.It is arranged by reasonable size, so that seat integrally will not excessively show thick, avoids lofty sense, improve beauty Degree.

Preferably, the office chair further includes having the leg rest regulating mechanism of drawing and pulling type and being arranged before leg rest regulating mechanism The leg rest portion at end, the leg rest regulating mechanism are connected with upper plate；The whole of seat is shorter in length than in front-rear direction lower plate Body length forms the second accommodating area beyond the lower part of lower plate length thereof in the front of lower plate and seat；In leg rest portion When in rounding state, leg rest portion is exactly in the second accommodating area.The second accommodating area formed in front of lower plate has been given again The space of leg rest portion is accommodated when gathering, leg rest portion, occlusion part and seat almost combine together in overall appearance, do not see Internal mechanical structure, appearance is more beautiful.

Preferably, the second accommodating area is filled completely just, and after leg rest portion when leg rest portion is in the second accommodating area It holds and leans with the front end of lower plate, the width of leg rest portion is equal to the overall width of lower plate.Leg rest portion is just by second in this way Accommodating area filling is full, and the thickness of leg rest portion is equal to the thickness of bottom front edge of board, in rounding state, leg rest portion in above-below direction and Left and right directions melts as an entirety with seat all without lofty sense, is almost embedded in seat, is concealed design.

Preferably, leg rest regulating mechanism is in the left and right sides on chassis, the leg rest regulating mechanism include outer tube and Inner tube, inner tube are in outer tube and slidably reciprocate under external force along outer tube, and outer tube is directly or indirectly connected to upper plate bottom On face；Leg rest portion is connected to the front end of inner tube.Leg rest regulating mechanism is in the left and right sides on chassis, and width meets certain requirements, So that leg rest portion will not shake easily when pulling out use state, state is more stable, improves the use good opinion of user.

Preferably, outer tube is locked on upper plate bottom surface by fixing seat and screw cooperation.Tear appearance open in this way It unloads more convenient.

Preferably, the left and right sides of lower plate respectively forwardly extends, there are two baffles, before two baffles extend to seat It holds, the spacing between two baffles is greater than the width of the first accommodating area；Between the front of lower plate, two baffles and seat is super The lower part of lower plate length thereof collectively forms the second accommodating area out；When leg rest portion is in rounding state, leg rest portion is just hidden It ensconces in the second accommodating area.Leg rest portion is more hidden in seat, so that from side under rounding state When, it can't see leg rest portion, be completely embedded into seat.

Preferably, baffle is integrally formed with lower plate.It processes so more convenient, is also convenient for assembling.

Preferably, the seat support component further includes pedestal and the support rod for being vertically arranged in base center, The upper end connecting base plate of support rod.The preferably flexible gas bar of the support rod, can control lifting.

Preferably, upper plate is plank, lower plate is made of plastics.Preferably PP material is made.

Preferably, plate-like portion with a thickness of 3.5mm-6mm, occlusion part with a thickness of 20mm-28mm, the thickness of zones of extensibility For 2mm-28mm.

A kind of office chair, including seat and seat support component, the seat support component includes chassis；Described Seat includes: the upper plate for connection cushion, and the lower plate below upper plate, and upper plate and lower plate pairing exist It is connected together and by fastener, lower plate is symmetrical two pieces, spaced, two pieces of lower plates between two pieces of lower plates Between region form first accommodating area that is recessed upwards, the two sides of the first accommodating area form down convex occlusion part, and chassis is complete Portion or part are arranged in the first accommodating area.

It alternatively, is that lower plate is divided into symmetrical two pieces, the interval region between two pieces of lower plates Form the first accommodating area.

Preferably, the chassis directly passes through screw connection upper plate.

Preferably, the occlusion part respectively forms the zones of extensibility with curved surfaces to extension at left and right sides of seat, The thickness of lower plate is gradually thinning to zones of extensibility by occlusion part.

Preferably, occlusion part with a thickness of 15mm-30mm, zones of extensibility with a thickness of 10mm-30mm.

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

1. lower plate can be according to preset shape, the separately machined molding of size, and goes to the bottom by one lower plate of setting Fovea superior forms the first accommodating area in the middle part of plate, and chassis is assemblied in the first accommodating area；Again alternatively, lower plate is symmetrical two Block forms the first accommodating area between two pieces of lower plates；And the first accommodating area two sides are installed because difference in height forms occlusion part Complete rear chassis can be hidden in occlusion part completely or partially, so that office chair integrally seems relatively beautiful；Further say, under The space that leg rest portion is accommodated when collapsing, the leg rest in overall appearance have been given in the second accommodating area formed in front of bottom plate again Portion, occlusion part and seat almost combine together, do not see internal mechanical structure, appearance is more beautiful.

2. lower plate is integrated injection molding, can be separately machined, under the premise of keeping lower cost, screening is met The requirement of gear has practical value very much.

3. a part of outer tube is mounted in escape groove, and make escape groove by the way that escape groove is arranged in occlusion part Height and outer tube consistency of thickness, the width of escape groove and the equivalent width of outer tube namely outer tube and evacuation groove groove wall are close Fitting, this set makes outer tube, and stability is guaranteed after mounting, effectively reduces the vibration of outer tube, guarantees that leg rest is adjusted Mechanism steadily operates.

4. the spacing that leg rest regulating mechanism is arranged between chassis two sides, two inner tubes is larger, after leg rest portion is installed It is more stable.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of office chair in embodiment 1.

Fig. 2 is the structural schematic diagram (unfolded state) of seat, chassis, lower plate and leg rest.

Fig. 3 is the construction profile of office chair.

Fig. 4 is the structural schematic diagram (rounding state) of seat, chassis, lower plate and leg rest.

Fig. 5 is the cooperation schematic diagram between seat, chassis, lower plate, leg rest and backrest.

Fig. 6 is the cooperation schematic diagram of seat, chassis, lower plate and leg rest.

Fig. 7 is the structural schematic diagram of inner tube and sliding block.

Fig. 8 is the structural schematic diagram of inner tube, sliding block, substrate and bottom case.

Fig. 9 is the structural schematic diagram of inner tube and leg rest portion.

Figure 10 is the structural schematic diagram of leg rest portion.

Figure 11 is the combining structure schematic diagram of substrate and bottom case.

Figure 12 is the fractionation structural representation of bottom case and upper cover.

Figure 13 is the cooperation schematic diagram of substrate, tension spring and bottom case；

Figure 14 is the bottom surface structure schematic diagram of office chair in embodiment 2；

Figure 15 is the disassembled form schematic diagram of office chair seat, chassis and lower plate in embodiment 3.

It is identified in figure as follows:

Pedestal 1, contracting gas bar 2, chassis 3, seat 4, leg rest regulating mechanism 5, leg rest 6, lower plate 7, backrest 8, first accommodate Area 24, the second accommodating area 9, handrail 10, plate-like portion 71, occlusion part 72, baffle 73, escape groove 721, outer tube 51, inner tube 52, substrate 61, bottom case 62, upper cover 63, cushion 64, transverse slat 611,613, second hook of the hook of otic placode 612, first 621, tension spring 65, sliding slot 521, sliding block 522.

Specific embodiment

Specific embodiment of the present utility model is made a detailed explanation with reference to the accompanying drawing.Other side in the present embodiment To positioning be normally sitting on chair with people when, people orientation judgement on the basis of.With human body at this time towards direction be before, with people After the direction of body backwards is, on the left of human body for a left side, be the right side on the right side of human body, upper on vertical direction be it is upper, on vertical direction Under be under.And in embodiment the leg rest regulating mechanism, lower plate front end, rear end be to determine referring to above-mentioned orientation Justice；Such as the front end of leg rest regulating mechanism refers to that the front end of inner tube, the rear end of leg rest regulating mechanism refer to the rear end of outer tube.

Embodiment 1: the office chair as shown in Fig. 1~Figure 13, including backrest 8, seat 4 and seat support component 21, institute The seat support component 21 stated include chassis 3, pedestal 1 and the support rod 2 for being vertically arranged in 1 center of pedestal, support rod 2 it is upper Hold connecting base plate 3；Specifically, support rod 2 can be the star base of foot wheel using flexible gas bar, pedestal 1.Chassis 3 is mating Using adaptive line traffic control, there is adaptation function, the people of different weight has similar impression, eliminates and manually adjust spring Trouble.Using line traffic control mode man-machineization, facilitate operation.There is fourth gear lock function on chassis, and backrest maximum reclining state can be free Locking, and there are four different angles is available for backrest, it is possible to provide more comfortable impression.

The seat 4 includes: the upper plate 22 for connection cushion 23, and the lower plate in 22 lower section of upper plate 7, upper plate 22 is plank, and lower plate 7 is made of plastics or PP material；Upper plate 22 and about 7 lower plate are to being combined simultaneously It is connected by fastener, fastener uses screw；As shown in Figure 5,6, the middle part fovea superior of the lower plate 7 forms the first accommodating Area 24, the two sides of the first accommodating area 24 form down convex occlusion part 72, and the front and back of the first accommodating area 24 is connected to outside, chassis 3 all or part of settings are in the first accommodating area 24.

The top surface of first accommodating area 24 constitutes plate-like portion 71, and the plate-like portion 71 is integrally formed with occlusion part 72；Again Furtherly, plate-like portion 71 with a thickness of 4mm-5mm, occlusion part 72 with a thickness of 22mm-26mm.The plate-like portion 71 with it is upper Bottom plate 22 is affixed, and the chassis 3 passes through plate-like portion 71 by screw four corner parts and connects upper plate 22；It installs Rear chassis 3 can be hidden in completely or partially in occlusion part 72, and chassis 3 only has lower end fraction and is exposed from the side, even When occlusion part 72 is downwardly projecting enough, chassis 3 can be completely shielded, and people can't see chassis when side is observed obliquely in station, Improve aesthetic measure.

The occlusion part 72 respectively forms the zones of extensibility 25 with curved surfaces, bottom to extension at left and right sides of seat 4 The thickness of plate 7 is gradually thinning to zones of extensibility 25 by occlusion part 72；The office chair further includes handrail 10, and the handrail 10 has There is handrail installation portion 101, handrail installing zone 26 is formed on zones of extensibility 25, the handrail installation portion 101 is fixed at In handrail installing zone 26.

It further says, as shown in figure 9, the office chair further includes having the leg rest regulating mechanism 5 of drawing and pulling type and setting to exist The leg rest portion 6 of 5 front end of leg rest regulating mechanism, the leg rest regulating mechanism 5 are connected with upper plate 22；As shown in figures 1 to 6, preceding The entire length for being shorter in length than seat 4 of rear direction lower plate 7 respectively forwardly extends in the left and right sides of the front end of lower plate 7 There are two baffle 73, two baffles 73 extend to 4 front end of seat, and the spacing between two baffles 73 is greater than the first accommodating area 24 Width；Between the front of lower plate 7, two baffles 73 and seat 4 beyond the lower part of 7 length thereof of lower plate collectively forms the Two accommodating areas 9；When leg rest portion 6 is in rounding state, leg rest portion 6 is hidden in the second accommodating area 9 just；That designs in this way is good Place is: one come leg rest portion 6 shape design it is more diversified, such as the whole shape that front-thin-rear-thick can be set into of leg rest portion 6, In this way after being inserted into the second accommodating area 9, can perfectly it be mused together with lower plate 7, without lofty sense；Two are putting Setting knob 100, can very easily touch knob 100, facilitate pull on 6 bottom surface of foot.

Specifically, as shown in Fig. 6,7,8,9, leg rest regulating mechanism 5 is in the left and right sides on chassis 3, the leg rest Regulating mechanism 5 includes outer tube 51 and inner tube 52, and inner tube 52 is in outer tube 51 and slidably reciprocates under external force along outer tube 51, Outer tube 51 is directly or indirectly connected on 22 bottom surface of upper plate；Leg rest portion 6 is connected to the front end of inner tube 52；In the present embodiment, Outer tube 51 is locked on 22 bottom surface of upper plate by fixing seat 511 and screw cooperation.

72 inner hollow of occlusion part is equipped with the escape groove 721 for avoiding leg rest regulating mechanism 5 in occlusion part 72, puts The outer tube 51 of foot regulating mechanism 5 is partially located in escape groove 721, and the front opening of escape groove 721 exposes for outer tube 51.

As shown in figures 10-13, from bottom to top, leg rest portion 6 includes substrate 61, bottom case 62, upper cover 63 and cushion 64.Substrate 61 include the transverse slat 611 cooperated with inner tube 52 and the otic placode 612 for being symmetrically disposed on 611 two sides of transverse slat, otic placode 612 and transverse slat 611 are vertically arranged.

The left and right sides of substrate 61 is connected by sliding block with two inner tubes 52, and specifically, sliding block is divided into the first sliding block 523 With the second sliding block 522, inner tube 52 is hollow, and sliding slot 521 is equipped on the tube wall of 52 front end of inner tube, and the first sliding block 523 is arranged in cunning In slot 521, the second sliding block 522 penetrates sliding slot 521 and 523 pairing of the first sliding block, on the first sliding block 523 and the second sliding block 522 It is correspondingly provided with mounting hole 524, through-hole 525 is equipped on transverse slat 611, through-hole 525 is aligned with mounting hole 524, and screw screws in wherein It tightens and transverse slat 611 and the first sliding block 523, the second sliding block 522 links together, the second sliding block 522 plays position-limiting action, so that Substrate 61 for inner tube 52, can only along the chute 522 length range sliding.

The left and right sides in bottom case 62 is equipped with the groove body 622 for avoiding 52 front of inner tube, in contraction state, inner tube 52 Front is inserted into groove body 622；In front-rear direction, the length of substrate 61 is less than or equal to the half of 62 length of bottom case；On a left side Right direction, the width of substrate 61 are 4th/2nd to five/3rds of 62 width of bottom case.

Whole more beautiful to make, the latter half of bottom surface of bottom case 62 is equipped with decanting zone 624, and the setting of transverse slat 611 is settling In area 624, the bottom surface of transverse slat 611 and the bottom surface of bottom case 62 are in the same plane；Otic placode 612 is inserted into groove body 622 and groove body 622 side walls are affixed and pass through shaft 623 and are rotatablely connected, so that bottom case 62 can relatively rotate with around the shaft 623 with substrate 61, Alternatively bottom case 62 rotates in perpendicular around the two shafts 623；Shaft 623 can use screw, on the one hand play On the other hand connection function also functions to rotary action.

Shaft 623 is in 61 front position of substrate, and tension spring 65 is equipped between substrate 61 and bottom case 62；Specifically, exist Be provided with the first hook 613 at 611 rear end medium position of transverse slat, and be provided in the middle part of 62 rear end of bottom case end closure on one, under The shell 66 of end opening is equipped with the second hook 621 in 66 upper end of shell, and tension spring 65 is connected to the first hook 613 and the second hook Between 621, and tension spring 65 is hidden in shell 66；After user rests on foot in leg rest portion 6, as shown in figure 13, bottom case 62 stress can rotate certain angle, by installing tension spring between substrate 61 and bottom case 62, plays certain buffer function, makes Foot is more comfortable, finds the suitable position placed under the premise of comfortable；After foot leaves, bottom case 62 can automatically reset again.

Cushion 64 together with the upper surface gluing of upper cover 63, and after being wrapped with plain cotton fabric, followed closely with rifle solid by plain cotton fabric edge It is fixed, so far complete the assembling of cushion 64 and upper cover 63；Cushion 64 can be used certain thickness sponge, upper cover 63 using plastics or PP material is made, and 64 shape of cushion, size match with 63 shape of upper cover, size.

As shown in Figure 10,12, upper cover 63 and 62 assembling process of bottom case are as follows: multiple mounting posts are provided in bottom case 62 67, steel is fixed with by screw 677 in each mounting post 67 and buckles 68；The steel button 68 extends downwardly for surrounding and peripheral region The steel disc of pawl 69 is distributed with, has hole eye 688 to pass through among steel button 68 for screw；Multiple and peace is offered on 63 bottom surface of upper cover The pilot hole 70 that dress column 67 matches；The pilot hole 70 of upper cover 63 is directed at mounting post 67, is pressed down, steel button 68 is made to enter assembly So far, the assembling of upper cover 63 and bottom case 62 is completed because upper cover 63 cannot extract the reason of pawl in hole 70.

Embodiment 2: it as shown in figure 14, in the entire length for being shorter in length than seat 4 of front-rear direction lower plate 7, is going to the bottom Lower part the second accommodating area 9 of formation of the front of plate 7 and seat 4 beyond 7 length thereof of lower plate；It is in and collapses in leg rest portion 6 When state, leg rest portion 6 is exactly in the second accommodating area 9.

When leg rest portion 6 is in the second accommodating area 9, the second accommodating area 9 is filled just it is full, and the rear end of leg rest portion 6 with The front end of lower plate 7 leans, and the width of leg rest portion 6 is equal to the overall width of lower plate 7.

Embodiment 3: as shown in figure 15, this embodiment differs from embodiment 1 in that: lower plate 7 is symmetrical Two pieces, lower plate 7 is made of plastics, spaced between two pieces of lower plates 7, region between two pieces of lower plates 7 formed one to First accommodating area 24 of upper recess, the two sides of the first accommodating area 24 form down convex occlusion part 72, all or part of setting in chassis 3 In the first accommodating area 24.In this case, the chassis 3 is directly contacted with upper plate 22, i.e., chassis 3 is directly connected by screw Connect bottom plate 22.

Above content is only illustrate to examples for clearly illustrating the present invention described in this specification.The utility model Person of ordinary skill in the field can make various modifications or additions to the described embodiments or using class As mode substitute, content without departing from the utility model specification or surmount model defined in the claims It encloses, all should belong to the protection range of the utility model.

Claims (20)

1. a kind of office chair, including seat (4) and seat support component, the seat support component includes chassis (3)；Institute The seat (4) stated includes: the upper plate (22) for connection cushion, and the lower plate (7) below upper plate (22), on Bottom plate (22) and lower plate (7) are to being combined and be connected by fastener, it is characterised in that: on the middle part of the lower plate Spill is formed down convex occlusion part (72) at the first accommodating area (24), the two sides of the first accommodating area (24), chassis (3) whole or portion Set up separately and sets in the first accommodating area (24).

2. office chair according to claim 1, it is characterised in that: the top surface of the first accommodating area (24) constitutes plate-like portion (71), the plate-like portion (71) is integrally formed with occlusion part (72).

3. office chair according to claim 2, it is characterised in that: the plate-like portion (71) is affixed with upper plate (22), The chassis (3) passes through plate-like portion (71) by screw and connects upper plate (22).

4. office chair according to claim 1, it is characterised in that: the occlusion part (72) is respectively to seat (4) left and right Two sides are extended the zones of extensibility (25) to be formed with curved surfaces, and the thickness of lower plate (7) is by occlusion part (72) to zones of extensibility (25) It is gradually thinning.

5. office chair according to claim 4, it is characterised in that: the office chair further includes handrail (10), described Handrail (10) has handrail installation portion (101), is formed on zones of extensibility (25) handrail installing zone (26), the handrail installation Portion (101) is fixed in handrail installing zone (26).

6. office chair according to claim 4, it is characterised in that: plate-like portion (71) with a thickness of 2mm-8mm, occlusion part (72) with a thickness of 15mm-30mm, zones of extensibility (25) with a thickness of 10mm-30mm.

7. office chair according to claim 1 or 4, it is characterised in that: the office chair further includes the leg rest tune for having drawing and pulling type Mechanism (5) and setting are saved at the leg rest portion (6) of leg rest regulating mechanism (5) front end, the leg rest regulating mechanism (5) and upper bottom Plate (22) is connected；In the entire length for being shorter in length than seat (4) of front-rear direction lower plate (7), the front of lower plate (7) with And seat (4) forms the second accommodating area (9) beyond the lower part of lower plate (7) length thereof；Rounding state is in leg rest portion (6) When, leg rest portion (6) is exactly in the second accommodating area (9).

8. office chair according to claim 7, it is characterised in that: leg rest portion (6) be in the second accommodating area (9) it is interior when, just It is good to fill the second accommodating area (9) completely, and the rear end of leg rest portion (6) and the front end of lower plate (7) lean, leg rest portion (6) Width is equal to the overall width of lower plate (7).

9. office chair according to claim 7, it is characterised in that: leg rest regulating mechanism (5) is in the left and right two on chassis (3) Side, the leg rest regulating mechanism (5) include outer tube (51) and inner tube (52), and inner tube (52) is in outer tube (51) and in external force It slidably reciprocates under effect along outer tube (51), outer tube (51) is directly or indirectly connected on upper plate (22) bottom surface；Leg rest portion (6) is even It is connected to the front end of inner tube (52).

10. office chair according to claim 9, it is characterised in that: occlusion part (72) inner hollow, in occlusion part (72) Equipped with the escape groove (721) for avoiding leg rest regulating mechanism (5), the outer tube (51) of leg rest regulating mechanism (5), which is partially located in, to be kept away It allows in slot (721), the front opening of escape groove (721) exposes for outer tube (51).

11. office chair according to claim 9 or 10, it is characterised in that: outer tube (51) cooperates by fixing seat and screw It is locked on upper plate (22) bottom surface.

12. office chair according to claim 7, it is characterised in that: the left and right sides of lower plate (7) is respectively forwardly extended with Two baffles (73), two baffles (73) extend to seat (4) front end, and the spacing between two baffles (73) is greater than the first accommodating The width in area (24)；Between the front of lower plate (7), two baffles (73) and seat (4) exceeds lower plate (7) length thereof Lower part collectively form the second accommodating area (9)；When leg rest portion (6) is in rounding state, leg rest portion (6) is hidden in second just In accommodating area (9).

13. office chair according to claim 12, it is characterised in that: baffle (73) is integrally formed with lower plate (7).

14. office chair according to claim 1, it is characterised in that: the seat support component further include pedestal (1) with And it is vertically arranged in the support rod (2) at pedestal (1) center, the upper end connecting base plate (3) of support rod (2).

15. office chair according to claim 1, it is characterised in that: upper plate (22) is plank, and lower plate (7) is plastics Material is made.

16. office chair according to claim 6, it is characterised in that: plate-like portion (71) with a thickness of 3.5mm-6mm, block Portion (72) with a thickness of 20mm-28mm, zones of extensibility (25) with a thickness of 2mm-28mm.

17. a kind of office chair, including seat (4) and seat support component, the seat support component includes chassis (3)； The seat (4) includes: the upper plate (22) for connection cushion, and the lower plate (7) below upper plate (22), Upper plate (22) and lower plate (7) are to being combined and be connected by fastener, it is characterised in that: lower plate (7) is left and right pair Two pieces claimed, it is spaced between two pieces of lower plates (7), the region between two pieces of lower plates (7) formed one be recessed upwards the One accommodating area (24), the two sides of the first accommodating area (24) are formed down convex occlusion part (72), and chassis (3) completely or partially setting exists In first accommodating area (24).

18. a kind of office chair according to claim 17, it is characterised in that: the chassis (3) is directly connected by screw Connect bottom plate (22).

19. a kind of office chair according to claim 17, it is characterised in that: the occlusion part (72) is respectively to seat (4) left and right sides, which is extended, forms the zones of extensibility (25) with curved surfaces, and the thickness of lower plate (7) is extremely extended by occlusion part (72) Area (25) is gradually thinning.

20. a kind of office chair according to claim 19, it is characterised in that: occlusion part (72) with a thickness of 15mm-30mm, Zones of extensibility (25) with a thickness of 10mm-30mm.