CN1676059A

CN1676059A - Chair

Info

Publication number: CN1676059A
Application number: CN 200410080377
Authority: CN
Inventors: 小岛清志; 植村敏基; 石田弘
Original assignee: Kokuyo Co Ltd
Current assignee: Kokuyo Co Ltd
Priority date: 2004-03-30
Filing date: 2004-09-29
Publication date: 2005-10-05
Anticipated expiration: 2024-09-29
Also published as: JP2005279065A; CN100443016C

Abstract

Provided is a suitably swingable chair having a structure capable of keeping required sufficient strength and being miniaturized. The chair has a swing mechanism 6 provided with a turning member 604 abutting on a part of a seat receiver 31 all times, whose abutment part p at the front position of a support part A is vertically moved independent of the seat receiver 31 and a seat body 30, for swinging the seat part 3 with the support part A as a fulcrum following the operation of the turning member 604.

Description

Chair

Technical field

The present invention relates to chair that a portion is waved.

Background technology

In the past, developed a kind of in order to alleviate the user's who causes because of taking a seat for a long time fatigue, and the chair that a portion is waved with some cycles.Such chair, by seat portion being supported on the shank, and making the place ahead of a portion with the some cycles lifting simultaneously with back shaft etc., a portion is waved repeatedly, thereby can alleviate buttocks, huckle, the fatigue of the small of the back and the swelling of lower limb of the user when taking a seat.Such chair, specifically, possess by the elevating mechanism that will constitute by the crank that driving force produced rotatablely moves the cam that is transformed into knee-action and will be passed to a portion by the knee-action power that cam produced of motor, and make a portion wave (for example, with reference to patent documentation 1) with some cycles by the place ahead that aforementioned knee-action power is passed to a portion.The result of this formation is, owing to avoided buttocks, huckle, the small of the back to act on the state that load is arranged at specific position with respect to the user, also can stimulate circulation simultaneously by waving, so the fatigue that the user causes because of taking a seat for a long time obtains relaxing, and, particularly the chair put down in writing of patent documentation 1 even also can avoid user's sight line is teetered under the state that a portion is waved, thereby can be avoided bringing sense of discomfort to the user effectively.

Patent documentation 1: the spy opens 2003-38286

Summary of the invention

But, the chair of structure as described above, a portion is minimum to be needed cam and 2 parts of crank except passing to for the driving force with motor, textural, from motor via cam, crank to seat portion 3 positions that are pivoted of minimum needs.This situation certainly will make the part number that constitutes elevating mechanism increase, and becomes the main cause that the structure that makes chair complicates.On the other hand, though on aforementioned elevating mechanism, requirement has the support strength of the load of taking a seat that a portion that withstands bears, but because its structure is very complicated as previously mentioned, therefore have to make each part that constitutes elevating mechanism to maximize to improve intensity, this situation has just become constitute the obstruction of elevating mechanism small-sizedly.

The present invention is conceived to such unfavorable condition, provide a kind of have keep necessary full intensity and chair structure, that can wave ideally that can miniaturization.

The present invention has taked following device in order to reach such purpose.Promptly, chair of the present invention, be to possess the seat body that bears the load of bringing by the user of taking a seat, from this seat body of supported underneath and be supported on supporter on the shank, with on aforementioned supporter, being that fulcrum makes aforementioned seat body and the supporter chair along the wabbler mechanism that teeters by the support portion that aforementioned shank was supported, it is characterized in that, aforementioned wabbler mechanism is constituted as to possess all the time and touches mutually with the part of aforementioned supporter, and do not exist with ... aforementioned supporter and seat body and make the knee-action portion that touches the position knee-action in the anterior position of aforementioned support portion or rear position with respect to the part of aforementioned at least supporter, action along with this knee-action portion, with aforementioned support portion is fulcrum, and aforementioned supporter and seat body wave integratedly.

According to such invention, because knee-action portion is the structure that directly makes the supporter knee-action, therefore to compare with the chair in the past that cam also is provided with crank and a plurality of positions that are pivoted not only is set in order making it to move up and down, can to cut down the part number effectively, make to constitute and oversimplify.In addition, even if adopt by giving necessary full intensity and can withstand the structure that acts on the load of taking a seat on seat body and the supporter fully for each part, because the reduction of part number also can constitute whole in miniaturization ground.And then, because knee-action portion remains the state of touching with respect to supporter, therefore formed knee-action portion and touched the structure that the position can not be collided in action, thereby the impact that can avoid this collision effectively is delivered to user's situation, damage and the wearing and tearing also avoiding aforementioned collision effectively simultaneously and caused can improve the durability of supporter and knee-action portion.Moreover, the present invention's said " supporter ", so long as the supporting seat body and with seat body integratedly the parts of interlock get final product, be to express with the notion that for example comprises positions such as seat support, framework, shell or parts.

To be easy to realize stable action in order adopting, to be easy to improve rotatablely moving of precision and to make the supporter knee-action, be preferably the rotary part that carries out knee-action along with spinning movement is set in aforementioned knee-action portion, make touching from the below with respect to the part of aforementioned supporter upward of this rotary part.

In addition, for adopt its be shaped as with respect to from the load of top etc., come from the external force in the outside or rounded parts are seen in vertical section that pressure has stronger structure, constitute knee-action portion more satisfactoryly, the vertical section preferably is set in aforementioned rotary part sees rounded rotary part body, the central axis of this rotary part body and the central axis skew ground that rotation drives the main shaft of aforementioned rotary part are set.For rotary part in detail, can be set forth in the countershaft that the aforementioned main shaft that can install rotatably with respect to aforementioned shank further is set in the aforementioned knee-action portion and is fixed on the aforementioned main shaft, has central axis, with the example of this countershaft as the rotary middle spindle of aforementioned rotary part body in the position that the central axis from this main shaft has been offset.

For one side is kept the function that supporter and seat portion are cosily waved, one side improves the free degree of the specification of rotary part, and prevent spinning movement by rotary part that cause with frictional resistance supporter and thing followed wearing and tearing, be preferably with aforementioned rotary part be set at have the aforementioned rotary part body that rotates together with aforementioned main shaft and countershaft and along the periphery configuration of this rotary part body and touch parts with the part of aforementioned supporter touches mutually.And then, in order to avoid supporter effectively and to touch the generation and the wearing and tearing of the frictional heat between the parts, preferably be provided with between aforementioned rotary part body and touch between the parts, make and touch the lost motion components of parts with respect to the rotation of rotary part body.

In order to avoid the wearing and tearing between main shaft and the shank and the generation of frictional heat effectively, preferably between aforementioned main shaft and aforementioned shank, be provided with the parts of bearings that rotatably supports this main shaft, the rotating part that rotates with aforementioned main shaft be set on this parts of bearings and be fixed on the fixed part that on the aforementioned shank, rotatably supports aforementioned rotating part.In order more effectively to avoid friction and wear, the slide unit that preferably is provided with between aforementioned rotating part and aforementioned fixation portion, aforementioned rotating part is slided with respect to aforementioned fixation portion, in addition, as being used for main shaft is fixed on preferred scheme on the shank, can enumerate with aforementioned shank be made as possess become the leg of its major part body and between this leg body and aforementioned supporter, cover the housing of at least a portion of aforementioned knee-action portion, and make the example of aforementioned main shaft support on this housing.

On the other hand, for avoid effectively because of the specific position of supporter with touch parts touch cause wearing and tearing, the situation of deterioration, the liner that touches mutually with aforementioned rotary part on preferred aforementioned supporter is set at and possesses the supporter body and be installed in this supporter body, all the time.Simultaneously, in order to eliminate the assembly error that touches parts and supporter when the assembling chair effectively, preferably forming on aforementioned liner can be with respect to the installation site of aforementioned supporter body along the vertical direction and the position-regulation portion of fore-and-aft direction adjusting.Specification as this liner, as preferred scheme, can enumerate aforementioned liner and be fixed on via bolt on the wall that aforementioned supporter body had, the aforementioned location adjusting portion is made as the slotted hole that tilts as direction and fore-and-aft direction up and down and is formed on example on the aforementioned wall and bolt penetration hole that aforementioned bolt can be passed.

For by set supporter and the position that touches that touches parts than high-freedom degree ground, and miniaturization ground constitutes wabbler mechanism integral body, and more satisfactory the design freedom that improves about the setting of the position of knee-action portion, preferably on aforementioned supporter body, be formed with peristome, aforementioned liner is installed on this peristome.

According to the present invention, because knee-action portion is the structure that directly makes the supporter knee-action, therefore to compare with the chair in the past that cam also is provided with crank and a plurality of positions that are pivoted not only is set in order making it to move up and down, can to cut down the part number effectively, make to constitute and oversimplify.In addition, even if adopt by giving the intensity of necessary abundance and can sustain the structure that acts on the load of taking a seat on seat body and the supporter fully for each part, because reduction by the part number, also can constitute integral body in miniaturization ground, therefore can make the chair of good chair of appearance and available low-cost production.And then, because knee-action portion remains the state of touching with respect to supporter, therefore can form knee-action portion and touch the structure that the position can not be collided in action, thereby the impact that can avoid this collision effectively is delivered to user's situation, simultaneously avoid caused damage of aforementioned collision and wearing and tearing effectively, thereby can improve the durability of supporter and knee-action portion.

Description of drawings

Fig. 1 is the stereogram of the chair of an example of the present invention.

Fig. 2 is the major part side view of the chair of this example.

Fig. 3 is the major part stereogram of the chair of this example.

Fig. 4 is the major part drawing in side sectional elevation of the chair of this example.

Fig. 5 is this major part profilograph.

Fig. 6 is the schematic plane of major part of the chair of this example of expression.

Fig. 7 is the action specification figure of the chair of this example.

Fig. 8 is the action specification figure of the chair of this example.

Label declaration

1 chair, 2 shanks

30 seat bodies, 31 supporters (seat support)

310b wall (sidewall) 310 supporter bodies (seat support body)

312 peristomes, 313 liners

313a position-regulation portion, bolt penetration hole (bolt penetration hole)

6 wabbler mechanisms, 60 knee-action portions

The central axis of 602 main shaft 602a main shafts (central shaft of main shaft)

The central axis (central shaft of rotating shaft) of 603 countershafts (rotating shaft) 603a countershaft

604 rotary part 604a touch parts (touching ring)

604b lost motion components (bearing part) 604c rotary part body

63 mechanism's housings, 632 parts of bearings

632a rotating part 632b fixed part

632c slide unit (bearing part) A support portion

B bolt p touches the position

The specific embodiment

Below, with reference to accompanying drawing an example of the present invention is described.

The chair 1 of in Fig. 1, having showed this example.This chair 1 possesses shank 2, seat portion 3, back 4 and pair of armrests portion 5, and wherein shank 2 possesses spoke shape leg 21 and the leg pillar 22 that has scroll wheel C; Seat portion 3 possess the seat body 30 that bears the load of bringing by the user of taking a seat and from the supporter of this seat body 30 of supported underneath, be seat support 31; Back 4 is supported on the shank 2 and is supporting the lower end by the pair of right and left carriage F that erects to the rear from the side of seat portion 3 simultaneously; Pair of armrests portion 5 is by erecting on this a pair of carriage F.

In addition, to adopt when making back 4 hypsokinesis not with seat portion 3 interlocks with the central portion F1 among the carriage F be the wabbler mechanism of a hypsokinesis to the chair 1 of this example.

And, the chair 1 of this example, via as an angulation part, by making a portion 3 of the shank 2 that does not exist with ... a portion 3 with the wabbler mechanism 6 that the some cycles change is waved a portion 3, shank 2 and seat portion 3 are assembled.Below, to the structure of this chair 1, utilize Fig. 2, Fig. 3, Fig. 4, Fig. 5 and Fig. 6 to be described in detail.Moreover in this example, the downside that has omitted present portion 3 covers the diagram of the decorative shell of seat support 31 and wabbler mechanism 6.In addition, in Fig. 3, omitted the diagram of carriage F.

Wabbler mechanism 6 comprises knee-action portion 60, drive division 61, power supply unit 62 and mechanism's housing 63, in detail, but along continuous straight runs be installed in rotatably leg pillar 22 above the inside or the outside of mechanism's housing 63, be assembled with knee-action portion 60, drive division 61 and power supply unit 62.

Power supply unit 62, for example as shown in Figure 3, power switch 622 that has the battery 621 at the rear portion that is fixed on mechanism's housing 63, exposes from the sidepiece of mechanism's housing 63 and connector 623 and then upper end are more outstanding and be contained the switch 64 of taking a seat of the inside of present portion 3 than mechanism housing 63, and have by the AC adapter that connector 623 is not shown via figure is connected with family expenses 100V socket and electric power after battery 621 charged, will charge simultaneously to the function of drive division 61 supplies.And, in the chair 1 of this example, supply with to the electric power of drive division 61, only be set under the power switch 622 and the switch 64 of taking a seat are all the state of ON and just can carry out.Moreover, having only power switch 622, become the wait state that could exist with ... the switch 64 of taking a seat that electric power is supplied with under the state of ON.

Drive division 61 is as Fig. 3 and shown in Figure 4, by the motor 610 of the inside that is incorporated in mechanism's housing 63, be installed in the driven wheel 611 on the driving shaft of motor 610 and be installed in the driver that the figure on the control substrate that figure do not show do not show and constitute.In addition, the motor 610 of this example adopts the DC brushless motor.Driver is in the time will being provided for driver by the electric power that power supply unit is supplied with, and for CD-ROM drive motor 610 electric current and frequency has been passed through the device that the alternating current of controlling leads to motor 610.In addition, driver also has the load of detection effect on motor 610, and the electric current that control is in real time supplied with and the function of frequency.Be delivered to knee-action portion 60 via driven wheel 611 by the driving force that motor 610 produced.

Knee-action portion 60, as Fig. 3, Fig. 4 and shown in Figure 5, possesses the reduction gearing 601 of transmitting the driving force of motor 610 via driven wheel 611 respectively, the main shaft 602 that rotates by this reduction gearing 601, at the both ends of this main shaft 602, be configured in the locational pair of rotary shafts 603 that has been offset from central shaft 602a as countershaft, and with the central shaft 603a of this rotating shaft 603 to be that the vertical section at center is seen rounded, be that a pair of rotary part 604 that is discoideus is seen in the side.

Reduction gearing 601 makes torque improve when the rotary speed of motor 610 is suitably slowed down by adopting the gear of Duoing than above-mentioned driven wheel 611 numbers of teeth, converts in order to make a portion 3 wave the driving force of being wished most and passes to main shaft 602.In this example as this example, with driven wheel 611: the gear ratio of reduction gearing 601 is set at 1: 3.

Main shaft 602, making the driving force transmitted by reduction gearing 601 when a pair of rotary part 604 both end sides that is positioned at this main shaft 602, that be positioned at the both sides of mechanism's housing 63 simultaneously transmits, also be supported on the dead eye of being located on mechanism's housing 63 631 via parts of bearings 632.In detail, parts of bearings 632 possesses with the rotating part 632a of main shaft 602 rotation and is fixed on mechanism's housing 63 and rotatably supports the fixed part 632b of aforementioned rotating part 632a, and then between rotating part 632a and fixed part 632b, be provided as the bearing part 632c of slide unit, reduce the loss of the driving force that causes by the friction when main shaft 602 rotations thus.This bearing part 632c is made of a plurality of balls that equally spaced dispose on the inner peripheral surface of fixed part 632b, and the depression by the spherical calotte shape on the outer peripheral face that can be maintained at the inner peripheral surface of being located at fixed part 632b and rotating part 632a rotatably, be on the bearing part support, make the relative position of each ball certain, rotating part 632a can be rotated with respect to fixed part 632b.In addition, between each ball and bearing part support, be filled with enough lubricating oil, make the friction that takes place by each ball reach irreducible minimum.

Rotating shaft 603 as countershaft, as mentioned above, be installed on the position that has been offset with respect to main shaft 602, around this rotating shaft 603, be provided with rotary part body 604c simultaneously with rotating shaft 603 rotations, simultaneously, also be equipped with along the touching of periphery configuration of rotating shaft 603 and rotary part body 604c and encircle 604a, and at rotary part body 604c and touch ring and dispose bearing part 604b between the 604a, can freely rotate with respect to rotating shaft 603 and rotary part body 604c so that touch ring 604a as lost motion components.This bearing part 604b and the above-mentioned bearing part 632c that is located on the parts of bearings 632 are same, constitute by a plurality of balls of equally spaced being disposed on the inner peripheral surface that touches ring 604a, and rotatably be maintained at the spherical calotte shape on the outer peripheral face of being located at the inner peripheral surface that touches ring and rotary part body 604c depression, be on the bearing part support.In addition, between each ball and bearing part support, be filled with enough lubricating oil, make the friction that takes place by each ball reach irreducible minimum.And, by rotary part body 604c, touch ring 604a and bearing part 604b and constitute rotary part 604.

And mechanism's housing 63 as Fig. 3 and shown in Figure 4, is the casing of die casting (die casting) system for example, on the both sides of this mechanism's housing 63, and formation dead eye 631 as described above and dispose pair of bearings parts 632.In addition, a pair of support component 633 that is used for supporting seat support 31 also is installed in both sides.

On the other hand, in the seat portion 3 that is being supported by wabbler mechanism 6, seat body 30 has the cushion body (buffer body) of the buffering person's of taking a seat load in inside, also is formed with the recess (figure does not show) that is used for from the below the above-mentioned switch 64 of taking a seat being accommodated in inside simultaneously.Seat support 31, as Fig. 2, Fig. 3 and shown in Figure 5, the seat support body 310 and the liner 313 that are made of welding and bending by for example steel plate constitute.

Seat support body 310, the pair of upstanding wall that is the antetheca 310a that will erect forwardly and the erects shape that to be sidewall 310b dispose in the mode of covering mechanism housing 63 in the side, simultaneously, on pair of sidewalls 310b, be formed with the supported hole 311 that is positioned at central authorities substantially on the fore-and-aft direction, be positioned at the peristome 312 located a little on the front than supported hole 311, be positioned at peristome 312 above 2 internal thread hole 312a.

In addition, liner 313 is that the section that for example is made of high-intensity metal as the steel that quenched is seen the piece that is L word shape, as shown in Figure 5, liner 313 is installed on the top 312b of peristome 312 with bolt b in the position of internal thread hole 312a.In addition, shown in the schematic diagram of Fig. 6, the bolt penetration hole 313a of the position-regulation portion that liner 313 is provided with slotted hole that direction up and down and fore-and-aft direction tilt, promptly regulate as direction and fore-and-aft direction up and down, the installation site with respect to the liner 313 of seat support body 310 can be set to position that dotted line represents, get final product so that the installation site along the vertical direction and the fore-and-aft direction displacement.

And, wabbler mechanism 6 and seat portion 3, by will be installed on mechanism's housing 63 support component 633 be located at supported hole 311 on the seat support body 310 be pivoted constitute support portion A in, make touching of rotary part 604 encircle touching mutually at the liner 313 on touching position p and being installed in seat support body 310 from the below upward of 604a, thereby assemble.At this moment, the actuator 642 of the switch 64 of taking a seat, its top is positioned at the inside of the cushion body that seat body 30 had.

Then, the action that utilizes Fig. 3, Fig. 7, Fig. 8 pair of wabbler mechanism 6 that couples together with seat portion 3 that a portion 3 is waved describes.

At first, power switch 622 at power supply unit 62 is under the wait state of ON, when actuator 642 made the switch 64 of taking a seat be placed in ON along with the bending corresponding actions of the cushion body of the inside that is seated at the seat body 30 that assigned position causes because of the user thus, the electric power that are stored in the battery 621 drove motor 610 by driver.The driving force of motor 610 is delivered to main shaft 602 by driven wheel 611 and reduction gearing 601, and main shaft 602 one sides are supported on one side rotation on mechanism's housing 63.So, rotary part 604, as Fig. 7 (a), Fig. 7 (b), Fig. 7 (c), Fig. 7 (d) schematically show, rotation along with main shaft 602, the central shaft 603a of rotating shaft 603 rotates around the round shape ground that is on every side of the central shaft 602a of main shaft 602, simultaneously, be the center with rotating shaft 602, rotate along with moving of the fore-and-aft direction of chair and above-below direction.At this moment, rotary part 604 touch ring 604a remain be installed in seat support body 310 on the state that touches mutually of liner 313, touch position p when fore-and-aft direction moves what touch ring 604a and liner 313, the position of liner 313 is also along with the action of rotary part 604 moves up and down slightly.Correctly say, as shown in Figure 8, liner 313 and the seat support 31 that this liner 313 has been installed carry out with support portion A be fulcrum, travel to and fro between with the position shown in the solid line to the rotational motion between the position shown in the dotted line.That is be that fulcrum makes supporter 31, is that seat body 30 and supporter 31 edges teeter, with support portion A.In addition, be installed on the rotating shaft 603 via bearing part 604b, therefore encircle moving of 604a, do not rub substantially, and only rotate forwards, backwards with respect to touching of liner 313 owing to touch ring 604a as mentioned above.

As previously discussed, the chair 1 of this example is constituted as: wabbler mechanism 6, possess and touch and do not exist with ... seat support 31 and seat support body 30 all the time mutually with the liner 313 that as supporter is the part of seat support 31 and make liner 313 and the knee-action portion 60 that touches position p knee-action that touches ring 604a in the anterior position of support portion A, action along with this knee-action portion 60, with support portion A is fulcrum, makes seat body 30 and as the seat support 31 of supporter, promptly seat portion 3 waves.

By setting such device for, because knee-action portion 60 is formations that seat support 31 is moved up and down, therefore with the chair in the past that cam also is provided with crank and a plurality of positions that are pivoted not only to be set in order making it to move up and down to compare, can cut down the part number effectively, make to constitute and oversimplify.In addition, even adopt the structure that can sustain the load of taking a seat in the present portion 3 of effect by giving necessary full intensity for each part fully, because the reduction of part number also can constitute whole than miniaturization ground.And then, because the ring 604a that touches of knee-action portion 60 keeps the state that touches all the time with respect to the liner 313 as the part of seat support 31, therefore formed and touched the structure that ring 604a and liner 313 can not collide in action, thereby the impact of having avoided this collision effectively is delivered to user's situation, thereby a portion 3 is cosily waved, also can avoid the damage or the wearing and tearing that cause because of aforementioned collision in addition effectively, thereby can improve the durability of seat support 31 and knee-action portion 60 and the action stability of knee-action portion 60 effectively.

And, owing to make touching from the below with respect to the liner 313 that as supporter is the part of seat support 31 upward of rotary part 604, therefore, be easy to make action stable by employing, be easy to improve rotatablely moving of precision, seat support 31 is cosily moved up and down.In addition, see that by making the vertical section central shaft 603a of rotating shaft 603 of rounded rotary part 604 and the central shaft 602a skew ground of main shaft 602 sets, adopt the strong shape of external force resistance, be that rounded parts are seen in the vertical section, can constitute knee-action portion 60 more satisfactoryly.

In addition, because main shaft 602 can be installed rotatably with respect to the mechanism's housing 63 as the part of shank 2, and rotating shaft 603 as countershaft is installed on off normal ground on this main shaft 602, therefore a portion 3 is cosily waved with respect to shank 2.And then, because rotary part 604 is by along the periphery configuration as the rotating shaft 603 of rotary part body, and have as with the part of seat support 31 touch touch parts touch ring 604a, therefore can suitably select this to touch the specification of ring 604a and make desirable rotary part 604.In addition, because use is to touch the bearing part 604b of ring 604a with respect to the lost motion components of rotating shaft 603 idle running as making, so can avoid liner 313 effectively and touch generation and the wearing and tearing that encircle the frictional heat between the 604a.

And then, the chair 1 of this example, because what seat support 31 adopted is the structure that liner 313 is installed on the present rack body 310, therefore can avoid effectively because of the specific position of seat support body 310 with touch ring 604a and touch and cause local wearing and tearing, fatigue.And, as the position-regulation portion that can regulate with respect to the installation site of the liner 313 of seat support body 310, bolt penetration hole 313a is made as the slotted hole that direction up and down and fore-and-aft direction tilt, thereby can eliminates the assembly error that touches parts 604 and liner 313 when assembling chair 1 effectively.

Particularly, in the chair 1 of this example, owing to be formed with peristome 312 on the present rack body 310, on this peristome 312, liner 313 is installed, therefore touch place p by the position of suitably setting peristome 313, the suitable setting, can improve the relevant design freedom that the position of knee-action portion 60 is set.

In addition, owing between main shaft 602 and mechanism's housing 63, be provided with parts of bearings 632, between the rotating part 632a of parts of bearings 632 and fixed part 632b, be provided with bearing part 632c, therefore avoided the friction and the wearing and tearing of main shaft 602 and mechanism's housing 63 effectively as slide unit.

And, in this example,, main shaft 602 is supported on mechanism's housing 63 as the part of shank as the form that main shaft 602 is fixed on the shank 2, therefore can stably make 60 actions of knee-action portion.

More than, though example of the present invention is illustrated, the concrete formation of each one is not limited to above-mentioned example.

For example, though adopted the vertical section to see rounded rotary part as knee-action of the present invention portion, but the shape of the parts that are rotated is not limited to circle, ellipse or other shape also can constitute the present invention, thus, also can constitute the simple sway mode in addition that moves up and down by rotatablely moving of certain speed.And then, being located at that peristome on the seat support is not only limited to only is the hole of opening, make the position that touches that knee-action portion touches from the below as long as can constitute, even for example have downwards or the shape of sideways open also passable, in addition, also can be such opening or exploitation position not to be set fully and the form that directly touches the supporter of seat support etc. from the below.

In addition, also be not limited to above-mentioned example, in the scope that does not break away from aim of the present invention, can carry out various distortion for the concrete formation of each one.

Claims

1. chair, it is to possess the seat body that bears the load of being brought by the user of taking a seat, from this seat body of supported underneath and by the supporter of thigh support, with on aforementioned supporter, being that fulcrum makes aforementioned seat body and the supporter chair along the wabbler mechanism that teeters by the support portion that aforementioned shank was supported, it is characterized in that, aforementioned wabbler mechanism is constituted as to possess with the part of aforementioned supporter and touches mutually all the time, and do not exist with ... aforementioned supporter and seat body and make the knee-action portion that touch position knee-action relative, along with the action of this knee-action portion is that fulcrum waves aforementioned supporter and seat body integratedly with aforementioned support portion with the part of aforementioned at least supporter in the anterior position or the rear position of aforementioned support portion.

2. chair as claimed in claim 1, wherein aforementioned knee-action portion possesses the rotary part that carries out knee-action along with spinning movement, makes touching from the below with respect to the part of aforementioned supporter upward of this rotary part.

3. chair as claimed in claim 2, wherein aforementioned rotary part possess the vertical section and see rounded rotary part body, and the central axis of this rotary part body and the central axis skew ground that rotation drives the main shaft of aforementioned rotary part are set.

4. chair as claimed in claim 3, wherein aforementioned knee-action portion further possesses the aforementioned main shaft of rotatably installing with respect to aforementioned shank and is fixed on the aforementioned main shaft, has in the position that the central axis from this main shaft has been offset the countershaft of central axis, with the rotary middle spindle of this countershaft as aforementioned rotary part body.

5. chair as claimed in claim 4, wherein aforementioned rotary part have the aforementioned rotary part body that rotates together with aforementioned main shaft and countershaft and along the periphery configuration of this rotary part body and touch parts with the part of aforementioned supporter touches mutually.

6. as claim 4 or 5 described chairs, it possesses between aforementioned rotary part body and touches between the parts, makes to touch the lost motion components of parts with respect to the idle running of rotary part body.

7. as claim 3,4,5 or 6 described chairs, wherein be provided with the parts of bearings that rotatably supports this main shaft between aforementioned main shaft and aforementioned shank, this parts of bearings possesses the rotating part that rotates with aforementioned main shaft and is fixed on the fixed part that on the aforementioned shank, rotatably supports aforementioned rotating part.

8. chair as claimed in claim 7, it possesses between aforementioned rotating part and aforementioned fixation portion, the slide unit that aforementioned rotating part is slided with respect to aforementioned fixation portion.

9. as claim 3,4,5,6,7 or 8 described chairs, wherein aforementioned shank possess become the leg of its major part body and between this leg body and aforementioned supporter, cover the housing of at least a portion of aforementioned knee-action portion, make aforementioned main shaft support on this housing.

10. as claim 2,3,4,5,6,7,8 or 9 described chairs, the liner that touches mutually with aforementioned rotary part on wherein aforementioned supporter possesses the supporter body and is installed in this supporter body, all the time.

11. chair as claimed in claim 10, wherein on aforementioned liner, be formed with can be along the vertical direction and fore-and-aft direction regulate position-regulation portion with respect to the installation site of aforementioned supporter body.

12. chair as claimed in claim 11, wherein aforementioned liner is fixed on via bolt on the wall that aforementioned supporter body had, and the aforementioned location adjusting portion is the slotted hole that tilts as direction and fore-and-aft direction up and down and be formed on the bolt penetration hole of passing aforementioned bolt on the aforementioned wall.

13. as claim 10,11 or 12 described chairs, wherein on aforementioned supporter body, be formed with peristome, aforementioned liner be installed on this peristome.