CN1457240A

CN1457240A - Chair, especially office chair

Info

Publication number: CN1457240A
Application number: CN02800423A
Authority: CN
Inventors: A·斯特普拉; A·克林霍兹
Original assignee: INTELSCHTUR OFFICE FURNITURE GmbH
Current assignee: INTELSCHTUR OFFICE FURNITURE GmbH
Priority date: 2001-02-28
Filing date: 2002-02-26
Publication date: 2003-11-19
Also published as: JP2004518507A; WO2002067726A8; US20030075961A1; WO2002067726A1; DE10109624C1

Abstract

The invention relates to a chair, especially an office chair, having a seat part and a downward-slanting guide track for furnishing a combined downward and rearward motion or a combined upward and forward motion for the seat part. The seat part accordingly slides along a predetermined guide track, in many cases in cushioned fashion, to the rear and downward. To improve the ergonomics of such a chair, a swiveling device with an at least horizontal pivot shaft can be provided for pivotably disposing the seat part; the swiveling device is disposed between the seat part and the guide track, and the swiveling device is disposed so as to be movable together with the seat part along the guide track. As a result, a combined motion of the seat part can be generated, which is composed of the cooperation of the predetermined guide track and the swiveling motion about the pivot shaft of the swiveling device.

Description

Chair, the chair of particularly handling official business

The present invention relates to especially a kind of office chair of a kind of chair, this chair has a seat support part and a downward-sloping guide rail, so that this seat support partly produces the moving or make progress and travel forward of combination downwards and backward.

For example document DE 199 00 454 A1 have proposed this chair.At this place, the seat support that constitutes as the seat support carriage of rigidity is arranged in end in face of the seat of seat bracket, and this seat bracket then can lead mobile at a guide that is positioned at chair leg upper end.So this seat bracket can be along a guide rail movement in guide.When the user of chair sat on this chair, the seat support carriage of this rigidity in a kind of mode of aggregate motion not only downwards but also motion backward.This motion is to be used for producing by the elastic force that overcomes a special spring assembly.Described a kind of spring assembly in the document, the elastic force of this device increases from certain camber of spring and begins to descend.This director element dips down and tiltedly arranges and the design of the direction convex curved of present dishes served at a feast ground.So move along a circuit orbit basically.So not only the seat face can move downwards and backward, and backrest also can be followed this motion process.By using flexible seat support carriage, owing to also can make backrest produce additional inclination in this place's bigger lever force of effect.

DE 433 1987 A1 disclose another kind of chair, and its seat support can roughly be positioned at an IA rotating shaft of pin that is sitting in top people around one and be circular arc backward and be rotated down.For this reason, adopted a circular arc director element, this guide is fixed on the post leg support.Seat bracket can carry out the slide-and-guide motion therein, sinks in this director element so this support can overcome the power of compression spring corresponding to rotatablely moving of seat support.

But in the prior art, this class Chair structure is arranged also, except the seat face rotatablely move or flip-flop movement, also produce the flip-flop movement of the transmission that the pressure of backrest connects.For example proposed a kind ofly to produce four of this motion and be hinged transmission by document EP 0645976 B1.But this Chair structure can not use downward-sloping guide rail, and this guide rail can provide more stable structure.

The shortcoming of this class chair is that for example the guidance system of DE 4,331 987 A1 designs quite highly, and produces sizable moving downward when little motion backward.Though known a kind of more flat constructional variant from DE 199 00 454A1, this chair then wait to improve aspect ergonomics.

So the objective of the invention is to propose a kind of can satisfy ergonomics that require with chair simple in structure.

According to the present invention, this purpose is achieved in that and is provided with a whirligig that has feathering axis at least that so that rotatably arrange the seat support part, this whirligig and this seat support partly are arranged together and can be along guide rail movement.Except along guide rail movement, seat support partly also can additionally center on the rotating shaft rotation of whirligig.Thereby can produce an additional motion component.Should point out as an example, can make thus seat support part than guide rail according to its shape can carry out separately downward-sloping faster.Certain this structure also can produce other motion process.So the motion of seat support part singly is not to be decided by the guide rail that tilts, but also can be rotated around the rotating shaft of whirligig.For this reason, whirligig must connect between guide rail and seat support part.

When guide rail moved or move, what relate to was a main motion that promotes the seat support part, rather than the compensating motion for fear of tension force and so at whirligig.So whirligig more preferably greater than 30 millimeters, is preferably 60 millimeters along the maximum shift motion of guide rail.When a kind of special construction pattern, this shift motion is between 120 and 130 millimeters.Moving downwards and backward of combination should cause the realizable of seat support part to be moved.

In addition, the maximum anglec of rotation around the rotation of the rotating shaft of whirligig can be preferably 10 ° greater than 5 °.In a special embodiment, it is between 12 ° and 15 °.This also should make the user of chair feel significantly is a significant motion process.Particularly can reach a seat support componental movement optimization, combination in conjunction with above-mentioned moving process.

In order to reduce wear, this guide rail can make rail plate or rolling guide, even the office chair that loading is big so also can reach the quite long life-span.At this moment, the seat support part can move along this rail plate or rolling guide.

In a kind of structural shape, be provided with a connection transmission mechanism like this, promptly the moving movement along guide rail is forced to be connected with the rotatablely moving of rotating shaft that centers on whirligig.Therefore, two motion processes are directly related and can not carry out separately.The exactly determined anglec of rotation that causes centering on rotating shaft along the predetermined movement travel of guide rail.These kinematic parameters can mate mutually, to reach the structure of best ergonomics.Connect transmission mechanism itself and be well known in the prior art, so allow the insider to get final product by selecting suitable parameters to produce desirable motion process.

This connection transmission mechanism is such design, when the seat support part is moved, can be rotated motion around the rotating shaft of whirligig, so that support moving downward of seat support Background Region partly downwards and backward.Like this, the seat support part is verted just fast in the speed of the direction of motion regulation of guide rail than it backward, so the guide rail and the whirligig acting in conjunction of mild structure also can produce the motion process that ergonomics is wished.

Scheme according to the front portion that the rotating shaft of whirligig is arranged in the seat support part can increase this effect especially effectively.By this measure, seat support partly shows obviously especially around rotatablely moving of rotating shaft.

Connect transmission mechanism and can comprise a Connection Element, this Connection Element is arranged on the one hand in the rotating shaft of whirligig, and can be around the bottom point of rotation rotation with feathering axis, it is arranged in equally in the rotating shaft of whirligig on the other hand, be rotated in the point of rotation of bottom and can connect with the seat support part by a hinge with feathering axis.The bottom point of rotation to the distance of the rotating shaft of whirligig and the bottom point of rotation to hinged distance and the hinge distance that is connected to the rotating shaft of whirligig all can regulate according to desirable concrete condition.Can preferentially determine the desirable motion process of ergonomics by this Connection Element.The notion of Connection Element can be regarded as whole part and assemblies here, and they connect transmission corresponding to one and support this motion.So, distribute in order to carry out power well, also can (on the left side and right side of chair) be provided with separately, symmetrical structure, these structures can be used as the described Connection Element of claim 8 and understand.

The guide rail and the bottom point of rotation that is used for this Connection Element layout that can interfix by favourable mode.Like this, they just can bear whole supporting forces at the fixed position of determining, whirligig and pin joint then can move on predetermined track.

This structural shape that this Connection Element is designed to the part of backrest is particularly advantageous.Like this, in whole motion process, backrest is just considered together.So the gearratio between the inclination of seat support part and the inclination of backrest is realized too together.

According to a scheme, connecting transmission mechanism is design like this, and the seat face of the bearing-surface of backrest and seat support part is connected ground backward around the rotating shaft of the bottom point of rotation or tilt around the rotating shaft of the rotating mechanism that moves along guide rail backward with about 1.5: 1 to 2.5: 1 preferably about 2: 1 angles than being forced to property.About 2: 1 gearratio is considered to particularly advantageous aspect ergonomics.Particularly, the anglec of rotation of the present dishes served at a feast greater than 5 °, during more preferably greater than a kind of structural shape of 10 °, the anglec of rotation of backrest is at least 10 °, is preferably 20 °.In an advantageous embodiments, this anglec of rotation is between 24 ° and 30 °.

The simple especially pattern to be achieved of a kind of structure for example is, this whirligig has a guide rail, and this guide rail can lead mobile along fixed guide.Here refer to member as far as possible all telescopic or that can move mutually.These members are done very firmly, thereby the heavier people of body weight also is well suited for.

In order to reach big as far as possible stability, the support of the whirligig on guide rail is centrally aligned supporting surface basically preferably.The supporting surface here is meant the plane that the contact point on chair and ground struts.If whirligig for example is arranged in the proparea of seat support part, for example above-mentioned guide rail of proper device then need be set, this guide supporting is in the center of supporting surface.So just can cause power transmission of the best on the guide rail and less load.

In addition, a spring assembly can be set, moving downwards and backward of seat support part can overcome the elastic force effect of this spring assembly at least.Like this, seat support part and TV structure pattern and fixed backrest just can be got back to original position automatically after chair unloads.Can influence seat comfort by variety of way by spring assembly.Here so-called spring assembly is meant the structure that all can overcome recuperability and can move.As for example available tension spring of spring assembly or compression spring, torsionspring, elastomeric spring or the like.

According to a kind of scheme, if spring assembly has an operative orientation that extends along guide rail basically, then spring assembly can be packed in the general structure well, this spring assembly can accurately be worked in moving direction, thus can utilize it whole elastic force effects and just wherein component or a part wherein.According to a kind of structural shape, if guide rail is made crooked,, but extend straight as long as the elastic force effect is not crooked the extension, then can realize big as far as possible near (tangent line, string or the like).

Spring assembly preferably includes a regulon that is used for regulating the elastic force effect.Like this, chair just can be transferred to the total weight grade as far as possible, and reaches the camber of spring performance an of the best.Regulon is made usually and can be regulated by hand by a suitable handle.

But also there is the possibility that a damping device is set, reduces the vibration of carrying out around the rotating shaft of whirligig that rotatablely moves with this damping device.If whirligig is installed in a seat support front end area partly, then can reaches good especially damping effect.

In addition, this damping device has an operative orientation, and this damping device is substantially perpendicular to around the radius of gyration of the rotating shaft of whirligig and works.Can reach the power transmission of the best in the damping device by this measure.Because the direction of observed radius is constantly to change when rotated, so this damping device can mate this swing-around trajectory with its action direction, or when the action direction of straight line, can carry out one big as far as possible near (tangent line, string or the like).Particularly, with one can obtain mutual vertically extending operative orientation thus when guide rail has the spring assembly acting in conjunction of an operative orientation, these mutual vertically extending operative orientations are to support mutually concerning a kind of desirable pressure connects.

In order to produce a kind of rocking chair effect of the formula of playing on a swing, damping device can be provided with the cushioning effect that progressively increases.In other words, rotating distance is big more, and cushioning effect is also obvious, has so just set up an increasing resistance.Particularly with a spring assembly acting in conjunction time, can produce varied desirable spring shock absorption effect thus.

Damping device constitutes with a kind of elastomeric bumpers, is quite cheap.Cushioning effect very little during beginning can improve arbitrarily very simply with the sort buffer device.In order to reach certain cushioning effect, the suitable construction to elastomeric bumpers has proposed abundant suggestion in the prior art.

According to a kind of structural shape, if a spring/damping device affacts on this connection transmission mechanism, this spring/damping device is a spring/damping device that increases gradually when the moving downwards and backward of seat support part at least.Then normally particularly advantageous.Like this, whole connection transmission all participates in this spring/damping process of relevant apparatus.

According to a kind of scheme,, be favourable then to desired motion process if guide rail is crooked towards seat support part projection ground.Here the curved shape of particularly suitable is that circular arc, parabolic branch are linear or the like.

In this case, the theoretical flexural center of averaging of guide rail preferably is positioned at the below of chair placement surface.So just can cause a guider that structure is very mild, because can select quite mild curvilinear motion for use by bending.So with the whirligig acting in conjunction time, can reach the favourable tilt variation of the ergonomics of seat part.

A post leg support preferably is set, arranges guide rail in the top.Concerning the office chair, for example available with an intermediate studdle and on each end section of a supporting arm with a post leg support roller, that be generally five arms.

This post leg support is preferably also arranged a bottom point of rotation in upper end areas.Supporting for this bottom point of rotation directly realizes by the post leg support this moment.This is equally applicable to be furnished with the structural shape of guide rail thereon.

The post leg support can be designed to by favourable mode regulate in its height.This mechanism is early known by the people in the office chair, and has improved total controllability of chair.

Chair preferably has a headrest.When seat support part with may also have backrest to move far backward or when being rotated down, headrest is useful especially.In addition, the backrest that may be provided with needn't design De Taigao and satisfies identical purpose.

Rest the head on and preferably partly be connected with seat support.Produce unique advantage thus, that is: headrest causes the moving movement of seat support part or rotatablely moves, because headrest is to be connected with the whirligig that moves along guide rail by the seat support part.If one for example rotating distance greater than seat support part and be arranged on the chair with backrest that seat support is partly forced to be connected, then headrest can be met the head to the chair user, and his head is supported in reinforcement when backrest rotates backward, therefore, give the such sensation of user, he rotates far more backward, and then particularly head is supported must be good more.Thereby obtain extremely comfortable seat sensation, particularly when rotatablely moving.

This principle also reflects in claim 29, this claim relates to a kind of chair, each this chair of particularly aforementioned every claim, this chair comprises backrest and pressure bindiny mechanism of the seat support part of a rotatable layout, a rotatable layout, so that force the rotation of connection and transmission seat support part and backrest.In addition, be provided with a headrest, move is connected this headrest and seat support part (directly or without transmission ground).Up to now, in the prior art, always a headrest is connected with a backrest of chair usually.Exactly, headrest is arranged on the movable seat support part, gives the sensation of a kind of secure support of user of chair, particularly the seat support part downwards and backward rotate far the time.The notion of " motion connects " is meant direct be connected (for example the anglec of rotation and straight line shift motion equate) without transmission with the seat support part.So base portion and headrest carry out a common motion, backrest then carries out the motion of a transmission.

Describe some embodiments of the present invention in detail below in conjunction with accompanying drawing.Accompanying drawing is represented:

Fig. 1 is positioned at the diagrammatic side view of first embodiment of a kind of chair of handling official business of a upright zero position;

Fig. 2 is positioned at the diagrammatic side view of position by the office chair of Fig. 1 that recedes;

Fig. 3 is positioned at the diagrammatic side view of a forward tilt position by the office chair of Fig. 1;

Fig. 4 not only had been positioned at Fig. 1 zero position by the office chair of Fig. 1 but also had been positioned at the recede schematic diagram of position of Fig. 2;

Fig. 5 is positioned at the diagrammatic side view of second embodiment of a kind of chair of handling official business of a upright zero position;

Fig. 6 is arranged in the diagrammatic side view by the office chair of Fig. 5 of the position that recedes;

Fig. 7 is by the diagrammatic rear view of the office chair among Fig. 5;

The handle official business exploded view of the 3rd embodiment of chair of Fig. 8 has been omitted seat face and back upholstery among the figure;

Fig. 9 shows the full section of the office chair guide rail of seat face, and wherein, chair is positioned at and has the upright zero position that maximum weight is set up;

The view that Figure 10 is similar to Fig. 9, the chair of wherein handling official business is positioned at a sweptback position;

Figure 11 show the seat face, according to the full section of the office chair guide rail of Fig. 8, wherein, chair is positioned at and has the upright zero position that minimum weight is set up;

The view that Figure 12 is similar to Figure 11, this office chair is positioned at a sweptback position among the figure.

Office chair 1 shown in Figure 1 mainly comprises a bottom section 2 and a seat area disposed thereon 3.

Bottom section 2 comprises that a chair shank divides 4, and this chair shank branch has five and is the supporting arm 5 that ray shape is stretched out from a center, has fixed a runner 6 that stretch out, rotatable layout respectively downwards at the free end of these supporting arms.Upwards erect a pillar 7 at the center of bottom section 2.Runner 6 usefulness its underpart contact points are determined the chair placement surface, and this placement surface overlaps with ground when runner 6 places ground.Be provided with a base plate 8 in the upper end of Height Adjustable pillar 7, this base plate is used for a seat area 3 and is connected on the bottom section 2.Base plate 8 provides a guide rail 9 on the one hand, and this guide rail tilts to extend upward and convex curved.On the other hand, base plate 8 has disposed a bottom point of rotation 10, and this point of rotation has the rotating shaft of a level, and base plate 8 is fixed on pillar 7 upper ends and can rotates around a vertical axis.Only schematically show guide rail 9 among the figure.The guide rail 9 that schematically illustrates is understood to representative and is used for along whole guide frames of a sliding surface or rolling surface, and this class formation is allowed a moving movement that support is arranged.

One is that the guide rail 11 that schematically illustrates can lead mobile on this guide rail 9 equally.The curvature shapes of its curvature coupling guide rail 9 of guide rail 11 usefulness also can be slided along guide rail 9.The center of curvature of averaging of guide rail 11 or guide rail 9 is positioned at the below of theoretical chair placement surface.Like this, guide rail 11 can be done quite gently, and only occupies very little total height in its total movement process.Certainly, some such mechanisms can be set also, be engaged on the guide rail 9, perhaps mesh in contrast to this, so that reach stable guiding by them or guide rail 11 back.

In guide rail 9 and guide rail 11 guidance systems, a spring assembly can be set.This spring assembly can with document DE 4331987 A1 or the described structural similarity of DE 19900454 A1.But also can increase according to the elastic force that document DE 19900454 A1 cancellation is successively decreased.For example can be by on base plate 8, hanging the spring action that simple tension spring obtains to require, the other end of this tension spring is suspended on the guide rail 11.One of reference number 12 expression is used for regulating the regulating handle of the spring action of this spring assembly.Also can make seat area 3 always get back to position shown in Figure 1 again by this spring assembly.This regulating handle generally is made of a knob, and this turn-knob can be regulated the firm banking of this spring assembly by a thread mechanism or gear mechanism and kindred organization.

Be provided with a rotating shaft 13 at front end, on this rotating shaft 13, rotatably arrange the front end area 14 of seat support part 15 with horizontal alignment as the guide rail 11 of rotating mechanism part.So being provided with the seat support part 15 of a seat cushion bearing 16 can not only move, and can additionally be rotated motion around rotating shaft 13 along guide rail 9 backward but also downwards in combination by means of guide rail 11.Carry out in order to make this motion be forced to connect, be provided with the connector 17 that a quilt is swung, this connector is rotatably installed on the bottom point of rotation 10 of base plate 8, and a regional at an upper portion thereof backrest 18 that is transited into seat area 3.In back-end region, seat support part 15 is provided with a vertically extending support 19 in zero position, and its upper end is hinged on the connector 17 by the pin joint 20 of a band flapping articulation axle.Consequent connection transmission has guaranteed the rotation that is forced to lead of the bearing-surface 22 of the seat face 21 of seat support part 15 and backrest 18.

Certainly, the tubular construction that schematically shows in Fig. 1 can be constructed on the opposite side of chair symmetrically, and like this, some above-mentioned parts also exist in the opposite side symmetry, and intermediate gaps then supports 16 fillings with seat cushion, and backrest 18 is carried out similar filling.

Between the downside 24 of the upside 23 of guide rail 11 and seat support part 15 or seat cushion supporting 16, be provided with the damper element of elastomeric bumpers 25 forms, this buffer has guaranteed the cushioning effect that increases progressively when seat support part 15 is rotated around rotating shaft 13, and spring body buffer 25 can be made different shapes by various mode for desired cushioning effect according to its material composition or according to its moulding.Certainly, other damping device of also can packing into reaches identical or similar effect.

Distance between distance between the rotating shaft 13 and the bottom point of rotation 10 and rotating shaft 13 and the pin joint 20, pin joint 20 are grouped under the influence that guide rail 9 and guide rail 11 constitute one to the distance of the bottom point of rotation 10 and their space and have guaranteed that mutually desirable pressure is connected motion, so when spring deflection, seat support part 15 not only can downwards but also can have been moved and recede simultaneously backward, in this case, tilt and not only carry out, but also can carry out around the center of curvature of determining by guide rail 9 of averaging around rotating shaft 13.But meanwhile, the bearing-surface 22 of backrest 18 not only can make progress but also can recede.Connect by this pressure, produce between the present dishes served at a feast 21 and the bearing-surface 22 and move.In the above-described embodiments, the angular movement ratio between the seat face 21 of the bearing-surface 22 of backrest 18 and seat support part 15 is 2: 1.

Fig. 2 shows in detail the receding of seat area 3 of office chair 1.Particularly, guide rail 11 moves backward and downwards along guide rail 9 as can be seen.Thereby reduced the distance between the rotating shaft 13 and the bottom point of rotation 10.According to this fact that remains unchanged of the distance between the distance between rotating shaft 13 and the pin joint 20 and the bottom point of rotation 10 and the pin joint 20, produced above-mentioned moving, so bearing-surface 22 recede strongerly, as the situation of seat face 21.In this process, the spring assembly that is not shown specifically in spring track 9 and guide rail 11 these systems, spring into or eject (on packing into compression spring or tension spring decide).And the compression that between the downside 24 of the upside 23 of guide rail 11 and seat support part 15, also produces elastomeric bumpers 25.This elastomeric bumpers 25 guarantees that resistance becomes increasing downwards and backward when further moving, thereby gives a kind of safe seat sensation of user of chair.

Except the zero position shown in Figure 1 that can find out seat face 21 substantial horizontal layout, also can find out the situation that this seat face slightly turns forward from Fig. 3.For this reason, the seat face is slided more forward and to upper edge guide rail 9.Can know from Fig. 3 and to find out that regulating handle 12 is much closer than at Fig. 1 the time from base plate 8.A seat face 21 that slightly turns forward particularly on the operating position, usually is popular concerning many sitting postures.By the pressure connection that connects transmission the bearing-surface 22 of backrest 18 is also correspondingly turned forward.By the backstop of determining fixing also can make this position that turns forward 3 at least concerning the spring assembly that is not shown specifically as new zero position, so office chair 1 is always pushed back this position again when unloading.

In Fig. 4, compare in conjunction with the position of Fig. 1 and Fig. 2, can be clear that very much the effect of total.When seat face 21 has tilted an angle [alpha], 22 of the bearing-surfaces of backrest 18 angle beta that tilted.In this example, angle beta is the twice of angle [alpha].As mentioned above, this is that especially connector 17 is realized by the connection transmission.Can know also from Fig. 4 and to find out that rotating shaft 13 just moves downward rarely that so front end area 14 also just descends rarely, the Background Region of seat face 21 then descends quite obviously.

Here should be pointed out that angle [alpha] has a summit of moving from rotating shaft 13.This is owing to due to the aggregate motion of guide rail 9.

By pressing structure of the present invention, office chair 1 can be implemented under the stable as far as possible situation of structure from the viewpoint of ergonomics, has best verticity or tilt capabilities.Require the excessive decline that can not cause seat face 21 of moving between the bearing-surface 22 of the present dishes served at a feast 21 and backrest 18 from the viewpoint of ergonomics.Exactly, reached effect, so avoided the uncomfortable sensation of tumbling backward with the comfortable formula of playing on a swing that increases progressively elastic force.

In addition, headrest, handrail, backrest height adjusting, lordosis rest and seat depth adjustment also can be set on chair.It is possible equally that in the chair art of particularly handling official business other regulated possibility.Stop device also can be set to be fixed on seat support part or backrest in the position arbitrarily or in the position of preliminary election.

Describe second embodiment in detail below in conjunction with Fig. 5 to 7 by office chair 1 of the present invention.Here only relate to the main distinction part with last embodiment, thus structure identical or act on identical part can be with reference to top explanation.For this reason, structure is identical or act on identical part and still continue to use identical reference number.

Here the office chair 1 that illustrates except the chair shank divide the layout of a supporting arm 5 of 4 and a thicker pillar 7 (in pillar 7, being provided with office chair spring vibration damper commonly used) different, the guide rail 9 of its straight line is different with last example.Guide rail 11 leads in a guide rail 9, and this guide rail 9 constitutes as a C shape section bar 27 that stands on head.Thereby spring vibration damper upwards is capped fully by the cross web that is closed 26 (seeing Fig. 7 especially) of C shape section bar 27.So elastomeric bumpers also is arranged in by in C shape section bar 27 area surrounded.Regulating handle 12 that zero position uses is arranged near the rotating shaft 13 the front area.Handle 12 affacts on the screw rod 28, and this screw rod carries out desired adjusting between guide rail 11 and the C shape section bar 27.

Be with another main distinction of last embodiment, the structure of the support 19 of seat area 3, exactly, this support is led by a middleware 29 to pin joint 20.In home position shown in Figure 5, support 19 and zones that carry out the transition to the connector 17 in the backrest 18 and extend abreast, middleware 29 is then from supporting 19 perpendicular to pin joint 20 extensions.Set up two sidelines of seat area 3 by supporting 19 this shape, wherein, supported 19 and be transited into handrail 30 in the top.This handrail is arranged essentially parallel to seat face 21 ground and extends.

Embodiment shown in Fig. 5 to 7 has disposed a headrest 31 of loading onto cushion, and this headrest is positioned at the upper end of backrest 18.Headrest 31 is arranged on the rotary support 32, but rotation can only be carried out with respect to a machine made resistance of for example many backstops.Rotary support 32 is connected one and inserts in the support, and this support is contained in the upper end of branching rod structure 34.Branching rod structure 34 can be two poles or the unique pole of making by bending.This branching rod structure supports 33 from inserting, and extends in the home position that is arranged essentially parallel to backrest 18 of chair.The free end 35 of pole extends downwards and to pin joint 20.Pole free end 35 is connected and is connected with seat area 3 thus with middleware 29 in the scope of pin joint 20.31 carry out identical rotatablely moving and motion backward together with seat face 21 so rest the head on.The anglec of rotation of the seat face 21 that from the comparison of Fig. 5 and 6, draws in other words, 31 the anglec of rotation that equals to rest the head on.In contrast, under the situation of 18 selected gearratios of backrest, rotate the angle of twice by connecting transmission here in common mode.Can clearly be seen that from Fig. 6, headrest 31 with respect to the upper end of backrest 18 than protruding more forward when Fig. 5.So, with backrest 18 relatively, not only when seat support part 15 is rotated backward but also backrest 18 when rotating backward, headrest 31 can both support chair user's head.Therefore, the chair user has obtained such sensation, and promptly head has obtained better support when rotating backward, thereby has obtained safe seat sensation when rotating backward.

Headrest 31 also can be provided with in principle highly and regulate, and for example can realize by the corresponding moulding of support 33 of the insertion in being pegged graft in the zone on top and branching rod structure 34.Supporting construction 34 is preferably a metallic rod that bends, thereby can reach the support of quite stable.

Below in conjunction with Fig. 8 to 12 in detail by handle official business the 3rd embodiment of chair 1 of explanation the present invention.Here only relate to the main distinction part with last embodiment, thus structure identical or act on identical part can be with reference to top explanation.For this reason, structure is identical or act on identical part and still continue to use identical reference number.

In this example, base plate 8 is made up of the box-shaped guide rails 37 that a steel plate bends part 36 and two layouts that are parallel to each other.Box-shaped guide rail 37 has a U-shaped cross-section, can pack into wherein so be arranged in a coil expander 38 of its below respectively.The front end of box-shaped guide rail 37 seals with a gripper shoe 39.The inboard of gripper shoe 39 is fixed an end of the coil expander 38 that each velamen packs into respectively.Bend at steel plate and to be provided with a bearing 40 that is used for fixing axle journal 41 on the part 36 with one heart.Divide 4 rotation generally in pillar 7, to carry out with respect to the chair shank.The suitable system that constitutes this pillar 7 is that the people is known and widely-used.

Guide rail 11 is made of a pair of siding track 42, and they interconnect by a stiffening frame 43 in its back-end.In addition, guide rail 11 comprises a guide rail cover plate 44 made from working of plastics.Siding track 42 and stiffening frame 43 all are arranged in the guide rail cover plate 44.Wherein siding track 42 is shelved on the protuberance 46 with the sidewall 45 that is parallel to guide rail cover plate 44 with having distance.So the downside of guide rail cover plate 44 can slide at the upside of box-shaped guide rail 37, guiding movement then can be carried out along the box-shaped guide rail uncovered from the back side 37 in siding track 42 both sides.Box-shaped guide rail 37 bends fixing on the part 36 at steel plate and realizes by the hold-down support 40 of arranged concentric.Framework 43 is such moulding, and promptly it contacts and can be used as thus the terminal backstop use (seeing following explanation for details) of the zero position of office chair with the rear end face of box-shaped guide rail 37.

In the front area of guide rail cover plate 44, a snubber block bearing 47 is set, elastomeric bumpers 25 is arranged in this bearing.Below this bearing 47, be provided with a screwed hole 48 that is parallel to the direction of motion extension of guide rail 9.In this screwed hole 48, can screw in and a screw rod 28 can be installed with screwing out.The head of screw rod 28 rotatably is supported on the traverse rod 49, this traverse rod is connected with the front end of siding track 42, on this root traverse rod 49, arranged be not shown specifically, the motion that is engaged on the turbine type in the screw rod 28 for example of a regulating handle 12 and, so that make screw rod 28 motions, make screw rod 28 around its rotation, so guide rail cover plate 44 moves along screw rod 28 by rotation regulating handle 12.Along siding track 42 lath 50 that extends in parallel and axle journal 51 actings in conjunction that are arranged on box-shaped guide rail 37 both sides, rise to prevent guide rail 9.

Second end of tension spring 38 is fixed on the rear end of a sealing of guide rail cover plate 44.In addition, because outward appearance has also been adorned an outer cover 52 at this superstructure of guide rail cover plate 44.

In the front area of the framework of seat support part 15 a pressure rail 53 has been installed, this presses rail to contact with elastomeric bumpers 25.

Elastomeric bumpers 25 exceeds the upside of track cover plate 44 and outer cover 52 and can compress by pressure rail 53.

Though the third structural shape does not illustrate handrail and headrest, also can dispose this two parts undoubtedly according to the related description of front second embodiment.

Describe the motion process that carries out along the guide rail 9 of the third embodiment in detail below in conjunction with Fig. 9 to 12.

Fig. 9 represents the upright zero position of chair.Can make guide rail cover plate 44 fully backward and move down by regulating handle 12, thus tension spring 38 in this zero position by the pre-tensioning in the biggest ground.In this zero position, stiffening frame 43 contacts with box-shaped guide rail 37 and with the back side of hold-down support 40.Elastomeric bumpers 25 complete discharges, but almost with the following side contacts of pressing rail 53.From this zero position, chair is loaded and is transformed in the sweptback position shown in Figure 10.Can know from figure and find out that tension spring 38 is by further tensioning.Guide rail cover plate 44 can be estimated to box-shaped guide rail 37 with to the distance at the back side of hold-down support 40 with stiffening frame 43 with respect to the shift motion of box-shaped guide rail 37.So it is considerably far away that box-shaped guide rail 37 stretches out from guide rail cover plate 44.Block hold-down support 40 by bearing 47 and also just accurately determined rotation backward or the final position of moving backward along guide rail 9.

Elastomeric bumpers 25 is pressed rail 53 to compress significantly now.So with tension spring 38 actings in conjunction the time, produce the spring/cushioning effect that increases progressively, thereby when rotating backward, give the sensation of a safety of user.By pressing rail 53 to be pressed onto the front portion of elastomeric bumpers 25, this buffer is just brought into play its whole cushioning effect.

The difference of Figure 11 and Fig. 9 only is that guide rail cover plate 44 has been pulled to the position foremost of regulating handle 12 tops.Press rail 53 in zero position shown in Figure 11, to contact thereby make with the zone line of elastomeric bumpers 25.Rotating backward and when lower edge guide rail 9 moves to Figure 12 position, pressing 53 parts of rail effectively to contact, so the damping performance that shows is also different with elastomeric bumpers 25.When the zero position shown in Figure 11, tension spring 38 is opened so longly also no longer as shown in Fig. 9 by pre-.This adjusting is particularly suitable for the lighter people of body weight, and the adjusting of Fig. 9 then is fit to the heavier people of body weight.When pressing Figure 11 and 12 adjustings, suitable stop device also can guarantee the stop in the position shown in Figure 12.

What also will remark additionally is, according to elastomeric bumpers 25 and press the moulding of rail 53 can produce multiple damping performance.The material character of elastomeric bumpers 25 and its structure or structure also can change damping performance.According to selected zero position (regulating) by regulating handle 12, press rail 53 can be pressed on the elastomeric bumpers 25 of different shaping (not only the material of thrum gonosome but also refer to its shape or structure), so that obtain a predetermined damping process in the rotary course of the present dishes served at a feast 21.The also available different material of elastomeric bumpers 25 is made as composite.

Claims

1. chair, especially the chair of handling official business, have a seat support (15) and a downward-sloping guide rail (9), so that seat support (15) produces moving downward of combination and the moving upward and travel forward of motion or combination backward, it is characterized by, be provided with a whirligig that has a feathering axis (13) at least, so that rotatably arrange seat support (15), and this whirligig is arranged along guide rail (9) movingly with seat support (15).

2. by the described chair of claim 1, it is characterized by, guide rail (9) constitutes as rail plate or rolling guide.

3. by claim 1 or 2 chair, it is characterized by, this whirligig greater than 30 millimeters, is preferably 60 millimeters along the maximum shift motion of guide rail (9).

4. by each described chair of claim 1 to 3, it is characterized by, greater than 5 °, be preferably 10 ° around the maximum anglec of rotation of the rotating shaft (13) of whirligig.

5. by each described chair of claim 1 to 4, it is characterized by, be provided with a connection transmission mechanism, this transmission mechanism is forcing to couple together along the moving movement of guide rail (9) with around the rotatablely moving of rotating shaft (13) of whirligig.

6. by the described chair of claim 5, it is characterized by, this connection transmission mechanism is to constitute like this, and when seat support (15) moved downwards and backward, the rotating shaft (13) that centers on whirligig produced and rotatablely moves to support moving downward of seat support rear portion.

7. by each described chair of claim 1 to 6, it is characterized by, the rotating shaft of whirligig (13) is arranged in the front portion (14) of seat support.

8. by each described chair of aforementioned claim, it is characterized by, this connection transmission mechanism comprises a connector (17), this connector be arranged on the one hand rotating shaft (13) with a certain distance from whirligig in and can be around the bottom point of rotation (10) rotation with feathering axis, on the other hand it be arranged in equally rotating shaft (13) with a certain distance from whirligig in and the articulated mounting (20) that can have a feathering axis and seat support by one partly (15) in the bottom point of rotation (10), be rotated.

9. by the described chair of claim 8, it is characterized by, the bottom point of rotation (10) mutual alignment of guide rail (9) and connector (17) is fixedly arranged.

10. by claim 8 or 9 described chairs, it is characterized by, connector (17) constitutes as the part of backrest (18).

11. by the described chair of claim 10, it is characterized by, connecting transmission mechanism is design like this, and the seat face (21) of the bearing-surface (22) of backrest (18) and seat support part (15) is forced to be connected ground backward around the rotating shaft of the bottom point of rotation (10) or center on backward along the rotating shaft (13) of the mobile whirligig of guide rail (9) with 1.5: 1 to 2.5: 1 best 2: 1 angle ratio.

12. by each described chair of claim 1 to 11, it is characterized by, whirligig has a guide rail (11), this guide rail can lead mobile along fixing guide rail (9).

13. by each described chair of claim 1 to 12, it is characterized by, whirligig is supported on the centre that position on the guide rail (9) is essentially supporting surface.

14., it is characterized by by each described chair of claim 1 to 12, be provided with a spring assembly, moving downwards and backward of seat support part (15) can overcome the elastic force effect of this spring assembly at least.

15. by the described chair of claim 14, it is characterized by, this spring assembly has an action direction that extends along guide rail (9) basically.

16. by claim 14 or 15 described chairs, it is characterized by, this spring assembly comprises a regulon (12) that is used for regulating the elastic force effect.

17. by each described chair of claim 1 to 16, it is characterized by, be provided with a damping device (25), the rotatablely moving of this this whirligig of damping device damping.

18. by the described chair of claim 17, it is characterized by, damping device (25) has an action direction, the radius of gyration that this damping device is substantially perpendicular to the rotating shaft (13) around whirligig works.

19. by claim 17 or 18 described chairs, it is characterized by, damping device (25) has the cushioning effect that increases progressively.

20. by the described chair of claim 19, it is characterized by, damping device (25) constitutes as elastomeric bumpers.

21. by each described chair of claim 5 to 20, it is characterized by, a spring/damping device affacts on this connection transmission mechanism, when seat support part (15) was moved downwards and backward, this spring/damping device produced the spring/damping force that increases progressively at least.

22. by each described chair of claim 1 to 21, it is characterized by, guide rail (9) is crooked towards seat support part (15) projection ground.

23. by the described chair of claim 22, it is characterized by, the theoretical center of curvature of averaging of guide rail (9) is positioned at the below of chair placed side.

24., it is characterized by by each described chair of claim 1 to 23, be provided with a post leg support, arrange guide rail (9) in the upper end areas of this support.

25., it is characterized by by each described chair of claim 1 to 24, be provided with a post leg support, arrange the bottom point of rotation (10) in the upper end areas of this support.

26. by claim 24 or 25 described chairs, it is characterized by, it highly is adjustable that the post leg support is designed to it.

27. by each described chair of claim 1 to 26, it is characterized by, be provided with a headrest (31).

28. by the described chair of claim 27, it is characterized by, headrest (31) is connected with seat support part (15).

29. particularly by each described chair of aforementioned claim, comprise that backrest (18) that seat support part (15) that a rotation arranges, rotation are arranged and one are used for forcing to be connected the partly pressure jockey of the rotation of (15) and backrest (18) of transmission seat support also, it is characterized by, be provided with a headrest (31), this headrest partly moves with this seat support and is connected.