CN1647724A

CN1647724A - Chair

Info

Publication number: CN1647724A
Application number: CNA200510003832XA
Authority: CN
Inventors: 北浦均; 森坚太郎; 三木章利; 浅井里佳
Original assignee: Omron Healthcare Co Ltd
Current assignee: Omron Healthcare Co Ltd
Priority date: 2004-01-19
Filing date: 2005-01-12
Publication date: 2005-08-03
Also published as: KR20050076623A; EP1555005A2; JP2005198979A; TW200531656A; EP1555005A3

Abstract

The chair comprises: a chair body having a seat surface part and the backrest part and a support part for supporting the chair body, and the reclining mechanism which moves the backrest part forward simultaneously with the backward falling in a state where an angle between the seat surface part and the backrest part is fixed constant is arranged between the support part and the chair body. To provide a chair having a reclining mechanism, by which an occupancy area is reduced as much as possible, while preventing the backward protrusion of a backrest part in the case of reclining and the contact position with a body such as shoulders is not changed.

Description

Chair

Technical field

The present invention relates to be suitable for the chair of massage armchair etc., relate in particular to a kind of backrest.

Background technology

The chair that in the past had backrest when backrest was fallen, is compared when upright with backrest and is rearward stretched out a lot.Therefore, when close wall was placed, the state that backrest was fallen also was provided with and the spacing of between the walls with regard to envisioning.

Stretch out in order to prevent that back-rest like this is rearward, in patent documentation 1, propose when it was fallen, the scheme that the bottom and the seat portion of back-rest are forwards slided along support.

But, patent documentation 1 described backrest, the angle that is seat portion is for spending the structure of necessarily only back-rest being fallen, and seat portion is forwards outstanding a lot, strengthened the occupied area of chair integral body, if having the problem that the space that do not have enough areas just can't be used.In addition, owing to changed the shoulder position on the back-rest when falling state, so even have adjustment is massaged when being used for massage armchair shoulder position, a problem that the angle of also falling with change is offset at the back-rest state that erects.

[patent documentation 1] spy opens the 2001-178575 communique

Summary of the invention

The present invention is in order to solve such problem in the past, and its purpose is to provide a kind of chair, and it has the backrest that can prevent that when falling back-rest from rearward stretching out and dwindling as far as possible occupied area and not changing Body contact positions such as shoulder.

In order to achieve the above object, chair of the present invention, have: be provided with the chair body of seat portion and back-rest and from the support portion of this chair body of supported underneath, it is characterized in that: between described support portion and chair body, be provided with backrest, this backrest under the state that the angle of described seat portion and back-rest is fixed, forwards moves described seat portion and back-rest in action that described back-rest was rearward fallen.

In addition, chair of the present invention, backrest has: link near the bend of support portion and the linkage component of back-rest, the seat portion that is located at the chair body and back-rest moving part, direction is installed the orbit portion of this moving part flexibly movably and can be changed the actuator of chair body posture forwards, backwards.

In addition, described actuator is a stretching structure, and the moving part of an end and chair body links, and the other end and support portion link.

In addition, described actuator is a stretching structure, and is linked between support portion and the seat portion.

In addition, described actuator is a stretching structure, and is linked between support portion and the back-rest.

In addition, be provided with the wheel of the contact of rolling on described moving part, actuator can be to rotate the rotary actuator that drives wheels such as rubber tyre.

In addition, chair of the present invention, on the support portion, front and back are provided with front support pin and back support pin with leaving, have on the backrest: be located at the anterior moving part on the described front support pin, along described seat portion setting and forwards, backwards direction assembled the anterior orbit portion of described anterior moving part flexibly movably, be located at the rear portion moving part on the described back support pin, along the back-rest setting and forwards, backwards direction assembled the rear portion orbit portion of described rear portion moving part flexibly movably, and be linked to telescopic actuator between chair body and the support portion, utilize the flexible of actuator can change chair body posture.In addition, this front portion moving part and rear portion moving part also can be the structures that can roll flexibly along described orbit portion.

In addition, described actuator is linked between the front support pin and chair body seat portion of support portion.In addition, also can be the structure that is linked between the back-rest of the back support pin of support portion and chair body.

In addition, chair of the present invention, be provided with the supporting walls that is positioned at about the chair body on the support portion, be provided with on the backrest: be located at anterior moving part and rear portion moving part on supporting walls and chair body one side, with be located at that the opposing party goes up and forwards, backwards direction support described anterior moving part and rear portion moving part flexibly movably, and along with the chair body towards the place ahead and to respect to the anterior moving part of rear portion moving part top guiding, the track that the posture of back-rest was rearward fallen, and be linked between chair body and the support portion and can change the telescopic actuator of chair body posture.

In addition, described track is provided in a side of the rail groove on the supporting walls, and anterior moving part and rear portion moving part are the protuberances that can be embedded in slidably flexibly in the rail groove.In addition, this front portion moving part and rear portion moving part also can be can be along the flexible structure of rolling rotatably of described track.

In addition, it is characterized in that: guide the track of described rear portion moving part, have the gradient of step-down forwards, guide the track of anterior moving part, have the gradient that forwards uprises.

In addition, described backrest has: link the quadric chain of the seat portion of chair body and support portion and be located at the expansion actuator of this quadric chain diagonal.

In addition, in described backrest, be provided with the tooth bar that is disposed near the pinion the boundary of seat portion and back-rest and is disposed at the support portion and closes with described little tooth wheel Nogami.

In addition, chair of the present invention also goes for having at back-rest the massage armchair of massage apparatus.In addition, the present invention also can be as the massage armchair that has the foot massage utensil on leg support.

(invention effect)

According to the present invention since between support portion and the chair body, be provided with angle at seat portion and back-rest and be fixed under the state rearward to fall and make its forwards mobile backrest when moving, so can prevent that back-rest from rearward stretching out with back-rest.And,,, and can dwindle occupied area so ratio had shortened the forwards outstanding size of seat portion when only falling back-rest because seat portion is only lifted back-rest upward by the part of falling.And, even because the back-rest that fell does not change the shape of chair body yet, so health does not have mobile with respect to the contact position of back-rest.

In addition, because backrest has near the bend that links support portion and the linkage component of back-rest, the seat portion that is located at the chair body and back-rest moving part, direction has been installed the orbit portion of this moving part flexibly movably and can have been changed the actuator of chair body posture forwards, backwards, so the position of the waist that takes a seat can keep the action of intactly falling.

In addition, because actuator is flexible structure, the moving part of an end and chair body links, and the other end and support portion link, so movable part is concentrated in the support portion, therefore, sense does not overbear under the state that covers movable part.

In addition, because actuator is flexible structure, and is linked between support portion and the seat portion, so can concentrate movable part tinily.

In addition, because actuator is flexible structure, and is linked between support portion and the back-rest, back-rest is rearward when falling stretches out so can eliminate fully.

In addition, owing to be provided with the wheel of the contact of rolling on moving part, actuator is to rotate the rotary actuator that drives wheels such as rubber tyre, thus do not need special orbit portion, not by railway clamp master's danger.

In addition, be on the preceding feet and back feet that is provided with before and after on the support portion owing to backrest with leaving, can seat portion and back-rest be installed movably flexibly and have utilized stretching of actuator to change the structure of chair body posture, so can obtain succinct outward appearance, and can weight reduction.

In addition, because actuator is to be linked to the front support pin of support portion and the structure between the chair body seat portion, thus movable part can be concentrated under the seat portion, unshowy.

In addition, owing to be provided with the supporting walls that is positioned at about the chair body on the support portion, and backrest is located between supporting walls and the chair body, so protect movable part in the side with wall easily, improve security.

In addition, because the guiding protuberance is the structure that can be embedded in slidably flexibly in the rail groove, so can lead reliably.

In addition, because track has the gradient of step-down forwards, and guides the track of anterior moving part to have the gradient that forwards uprises, so can strengthen the inclination of chair body.

In addition, owing to utilize quadric chain and expansion actuator to constitute backrest, so can be with the action of falling of simple structure.

In addition, on above-mentioned backrest, because rack-and-pinion that Xiang Hu Nogami is closed is located between chair body and the support portion, so can be non-slip and can move reliably.

In addition, when being located at massage apparatus on the back-rest,, also can not change the adjusting position of massage apparatus, so need not adjust the position of massage apparatus once more even fell action.

Description of drawings

Fig. 1 is the stereogram of the Chair frame structure of the embodiment of the invention 1.

Fig. 2 (A) is the side view that the back portion of Fig. 1 erects state, (B) is the fell side view of state of back-rest.

Fig. 3 is the schematic diagram of the chair of the embodiment of the invention 2, (A) is the stereogram of skeleton construction, and (B) back-rest erects the side view of state, (C) is the fell side view of state of back-rest.

Fig. 4 is the chair schematic diagram of the embodiment of the invention 3, (A) is the stereogram of skeleton construction, and (B) back-rest erects the side view of state, (C) is the fell side view of state of back-rest.

Fig. 5 is the schematic diagram of the chair of the embodiment of the invention 4, (A) is the stereogram of skeleton construction, and (B) back-rest erects the side view of state, (C) is the fell side view of state of back-rest.

Fig. 6 is the schematic diagram of the variation of the embodiment of the invention 4, (A) is the stereogram of skeleton construction, and (B) back-rest erects the side view of state, (C) is the fell side view of state of back-rest.

Fig. 7 is the schematic diagram of the chair of the embodiment of the invention 5, (A) is the stereogram of skeleton construction, and (B) back-rest erects the side view of state, (C) is the fell side view of state of back-rest.

Fig. 8 is the schematic diagram of the variation of the embodiment of the invention 5, (A) is the stereogram of skeleton construction, and (B) back-rest erects the side view of state, (C) is the fell side view of state of back-rest.

Fig. 9 is the schematic diagram of the chair of the embodiment of the invention 6, is the stereogram of skeleton construction (A), and (B) back-rest erects side view of the state, (C) is the back-rest side view of the state that fell.

Among the figure: 1-chair, 2-seat portion, 3-back-rest, 4-chair body, 5,205,305,405,505, the 605-support portion, the 6-backrest, 7-leg support portion, 41-indulges framework, the 42-crossing frame, 44, the 45-central frame, the 61-linkage component, the 62-roller, 63-roller track, 64-actuator, the frame section of 41a-back-rest, 62a-installing plate, 62b-connection shaft, 64a, the 464-motor, 64b-cylindrical shell, 64c-push rod, 251-front support pin, 252-back support pin, 206,306,406, the 606-backrest, the anterior roller of 262-, 163-roller track, 265-rear portion roller, 166-rear portion roller track, 351-supporting walls, the anterior slide block protuberance of 362-, 365-rear portion slide block protuberance, the anterior orbit hole of 363-, 366-rear portion orbit hole, the 462-wheel, 451-framework, 467, the 468-limit switch, the 469a-pinion, 469b-tooth bar, 551-rail walls, the 552-diapire, 661-quadric chain, 662-front link parts, 663-rear link parts, 662a, the 663a-fixed head, the 651-bearing.

The specific embodiment

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

Embodiment 1

Fig. 1 and Fig. 2 are the schematic diagrames of the chair bone case frame of the embodiment of the invention 1.1 expression chair integral body, it roughly has: possess the chair body 4 of seat portion 2 and back-rest 3, the pedestal shape support portion 5 of support chair body 4, the backrest 6 that between support portion 5 and chair body 4, is provided with, this backrest 6 can rearward fall back-rest 3 under the fixed angle with seat portion 2 and back-rest 3 is certain state and seat portion 2 and back-rest 3 forwards can be moved.

The place ahead in the seat portion 2 of chair body 4 is provided with leg support portion 7, and with whole back-rest 3, seat portion 2 and the leg support portion 7 of forming of a belfry.Promptly, have

vertical framework

41,41 of pair of right and left and a pair of

crossing frame

42,42 in front and back, and will indulge the paddy shape that framework 41 bends to predetermined angular at the back-rest 3 and the intersection of seat portion 2, bend to the chevron shape of predetermined angular at the seat portion 2 and the intersection of leg support portion 7.

Support portion 5 also is OBL belfry, and the chair body 4 that back-rest 3 is in the state that roughly erects is set in view field's scope of top upright projection.Backrest 6, have: the

linkage component

61,61 that links support portion 5 and back-rest 3, and near the sidepiece of the seat portion 2 that is located at the chair body 4 that vertical framework 41 constituted and the bend of back-rest 3, as a pair of roller 62 of moving part and conduct can be rotated flexibly and forwards, backwards direction installed movably flexibly roller 62 orbit portion a pair of C font roller track 63, can change the actuator 64 of chair body 4 postures.

Linkage component

61,61 is set as pair of right and left, and the centerpivot of the left and right sides frame section 41a of difference one end and back-rest 3 links the other end and the binding of the left and right sides, 5 rear end, support portion corner part pivot.Roller 62 can be installed on the lateral surface of the installing plate 62a that is fixed in frame section 41a bottom, back-rest 3 left and right sides in this embodiment flexibly rotationally.About

roller

62,62 between, be bonded a spool 62b and link.About

roller

62,62 and connection shaft 62b constitute moving part.

In addition, roller track 63 on the left and right sides of support portion 5

framework

51,51, will embed the C font groove of roller 62 towards the inboard and only fixing in parallel to each other length of stipulating.Actuator 64 is structures of direction linear telescopic forwards, backwards, and the connection shaft 62b pivot between its rear end and the roller 62 links, the front baffle 52 pivots binding of front end and support portion 5.

Actuator 64 so long as the structure of telescopic drive get final product, be not particularly limited, in this embodiment, it is the telescopic drive mechanism that feed screw mechanism and motor 64a by not shown screw thread feed shaft and nut combinations constitute, between the push rod 64c in cylindrical shell 64b and insertion cylindrical shell 64b, constituted not shown feed screw mechanism.

The following describes the chair action of embodiment 1.When falling back-rest 3, actuator 64 is shunk.Like this, as shown in Figure 2, then roller 62 forwards rolls along roller track 63 and moves, and forwards move the lower end of back-rest 3, and is lied down the angle of regulation by linkage component 61 traction back-rests 3.Forwards to move while back-rest 3 lower ends of falling in this wise, can prevent that back-rest 3 from rearward stretching out.

On the other hand, owing to fixed the seat portion 2 of chair body 4 and the angle of leg support portion 7 and seat portion 2 and back-rest 3, so the part that back-rest 3 was fallen is lifted upward with 2 of seat portion in leg support portion 7, when only falling back-rest 3 (with reference to chain-dotted line among Fig. 2), forwards Tu Chu size can shorten the b size, and reduces occupied area.

In addition, back-rest 3 even fall, but because the shape of chair body 4 does not change, so the contact position of health and back-rest 3 does not change, when when back-rest 3 is provided with the massage armchair of massage apparatus, because the adjusting position no change of massage apparatus, so need not adjust the massage position once more in the moment that has changed back-rest 3 angles.And,,, therefore have the effect of eliminating foot's edema in the back-rest 3 that fell so the foot that is supported by the leg support portion highly also is elevated because the angle of seat portion 2 and leg support portion 7 does not change.

Below, other embodiment of the present invention are described.In the following description, the difference of main explanation and the foregoing description uses identical symbol and omits its explanation for identical component part.

Embodiment 2

Fig. 3 is the schematic diagram of the chair of the embodiment of the invention 2.In this embodiment 2, the front support pin 251 and the back support pin 252 that leave before and after on support portion 205, being provided with.Front support pin 251 and back support pin 252 are parts of U word shape, and are one by vertical framework 253 bindings of direction extension forwards, backwards.In addition, the top of front support pin 251 is linked by the front baffle 254 to horizontal extension.

Backrest 206, have: as the anterior roller 262 that is located at the anterior moving part on the front support pin 251, with be provided with along seat portion 2, can rotate flexibly and forwards, backwards direction assembled anterior roller 262 flexibly movably, anterior roller track 263 as orbit portion, with be arranged on the back support pin 252, rear portion roller 265 as the rear portion moving part, with be provided with and can rotate flexibly along back-rest 3 and forwards, backwards direction assembled rear portion roller 265 flexibly movably, rear portion roller track 266 as orbit portion, and link between the central frame 255 of the back-rest 3 of chair body 4 and seat portion 2 boundarys and support portion 205 front baffles 254, scalable actuator 64, utilize the flexible of actuator 64, can change chair body 4 postures.

Actuator 64 is configured in the following side of seat portion 2, but also can be configured in back-rest 3 sides, and is linked between the back-rest 3 of the back support pin 252 of support portion 205 and chair body 4.In addition, actuator 64 also can be the structure that is linked between the back-rest 3 of indulging framework 253 and chair body 4.

Present embodiment 2 also is when falling back-rest 3, shown in Fig. 3 (B), (C), actuator 64 is shunk.Like this, then anterior roller 262 and rear portion roller 265 forwards roll mobile along anterior roller track 263 and rear portion roller track 266, relatively forwards move the lower end of back-rest 3, and the front end of seat portion 2 lifts upward, so the fallen angle of regulation of back-rest 3.Forwards to move, can prevent that back-rest 3 from rearward stretching out like this while the back-rest 3 that fell.

On the other hand, and meanwhile owing to change angle sliding seats portion 2 and leg support portion 7 obliquely upward, so with when horizontal direction moves, compare, shortened outstanding size forwards, and can reduce occupied area.In addition, because the shape of chair body 4 do not change, so the not variation of the position contacting of health and back-rest 3.And, according to the structure of present embodiment 2, owing to do not have the linkage component of the such support back-rest 3 of embodiment 1, so have the chair profile that approaches not manifest movable part.In addition, this embodiment 2, different with embodiment 1, the structure that constitutes seat portion 2, back-rest 3 and the leg support portion 7 of chair body 4 is not the integrative-structure of framework, but the structure that will constitute the frame body of seat portion 2 and leg support portion 7, be combined into one with the frame body that constitutes back-rest 3, but that the angle of each one is this point of fixing is identical.

Embodiment 3

Fig. 4 is the schematic diagram of the chair of the embodiment of the invention 3.

This embodiment 3, be with the difference of embodiment 2: the support portion 305 of pedestal shape is provided with a pair of supporting walls 351 that is positioned at chair body about 4, and at two places, front and back chair body 4 is supported on this supporting walls 351.In illustrated example, on the seat portion 2 outstanding be provided with relative with supporting walls 351 to a pair of fixation wall 21, and fixation wall 21 is supported on the supporting walls 351.

Backrest 306, it is characterized in that, be provided with: be located at front portion slip protuberance 362 and rear portion slip protuberance 365 on the set fixation wall 21 on the seat portion 2 of chair body 4, with be arranged on the supporting walls 351 and forwards, backwards direction be slidably supported anterior slip protuberance 362 and rear portion slip protuberance 365 flexibly, and along with chair body 4 is directed to the front portion protuberance 362 that slides with respect to rear portion slip protuberance 365 top positions and guiding rearward the fell anterior rail groove 363 and the rear portion rail groove 366 of back-rest 3 postures towards the place ahead, and links between chair body 4 and the support portion 305 and can change the telescopic actuator 64 of chair body 4 postures.

Anterior slip protuberance 362 and rear portion slip protuberance 365 are entrenched in anterior rail groove 363 and the rear portion rail groove 366 flexibly slidably.The rear portion rail groove 366 of guiding rear portion slip protuberance 365 has the gradient low towards the place ahead, guides the anterior rail groove 363 of anterior slip protuberance 362 to have the gradient high towards the place ahead.

Actuator 64, the one end links with bearing 352 pivots on the support portion of lower end, supporting walls 35 1 rear portion that is positioned at support portion 305, and the other end is carried out pivots bindings with axle 22 central authorities that stride across between the front portion slip protuberance 362 of the fixation wall 21 front end bottoms of chair body 4.Actuator 64 is positioned on the roughly same oblique line with anterior rail groove 363.

Present embodiment 3 shown in Fig. 4 (B), (C), when falling back-rest 3, makes actuator 64 elongations.Like this, anterior slip protuberance 362 and rear portion slip protuberance 365 can forwards slide along anterior rail groove 363 and rear portion rail groove 366 and move, and forwards move back-rest 3 lower ends, and simultaneously, seat portion 2 front ends lift upward, and with back-rest 3 predetermined angular that fell.Forwards to move, can prevent that back-rest 3 from rearward stretching out like this while the back-rest 3 that fell.

On the other hand, on one side because to change angle obliquely upward mobile seat portion 2 and leg support portion 7, so with reduced in comparison when horizontal direction moves outstanding size forwards, and can reduce occupied area.In addition, because the shape of chair body 4 do not change, so the not variation of the contact position of health and back-rest 3.

According to the structure of present embodiment 3, owing to hidden actuator 64 etc. with supporting walls 351 and fixation wall 21, so protect movable part easily.But, also can replace fixation wall 21, and from supported underneath chair body 4, and use slide protuberance 362 and rear portion slip protuberance 365 of front portion is supported in the frame parts of side.

Embodiment 4

Fig. 5 is the schematic diagram of the chair of the embodiment of the invention 4.In this embodiment 4, backrest 406, have: link the support portion 405 of frame shaped and the linkage component 61 of back-rest 3, and be set near the seat portion 2 of chair body 4 and back-rest 3 boundarys, as the wheel 462 of moving part and be used to change chair body 4 postures, as the motor 464 of actuator.That is, used the wheel 462 that rolls and contact, used rotation to drive the motor 464 of wheel 462 as actuator as moving part.

Support portion 405 and embodiment 1 are the same to be rectangular framework, but the width of the framework 451 about having widened, and wheel 462 can rollably contact above the left and right sides framework 451 with this flexibly.On wheel 462, used rubber tyre, and can be installed in rotatably flexibly on the seat portion 2 and near the installing plate 462a back-rest 3 boundarys that is fixed in chair body 4, utilized with the frictional force of framework 451 mobile on framework 451.

Motor 464 has not disposed motor drive shaft to the mode that protrude the side along framework 451 with support portion 405.Because the driving shaft of motor 464 is relative vertical with wheel 462, so can change the direction of transferring power by the Poewr transmission mechanism that is made of not shown turbine worm.

In addition, for the angle limits of back-rest 3 in prescribed limit, be provided with and detect back-rest 3 the fell minimum position (set-up positions) of angle and the limit switch 467,468 of maximum position (position that maximum was fallen).In diagram, limit switch 467,468 is configured on the framework 41a of back-rest 3 with the linking part of clamping linkage component 61, and according to the inclination of linkage component 61 and break-make.

Present embodiment 4 shown in Fig. 5 (B), (C), when falling back-rest 3, drives wheels 462 by motor 464 rotation, and 405 left and right sides framework 451 forwards rolls mobile along the support portion to make wheel 462.Like this, when forwards moved back-rest 3 lower ends, the front end of seat portion 2 lifted upward.When falling predetermined angular, linkage component 61 pushings one side's limit switch 467 also stops.When erecting, make motor 464 reversings and the wheel 462 of back-rest 3 lower ends is retreated.When erecting predetermined angular, linkage component 61 pushing the opposing party's limit switch 468 also stops.

Forwards to move, can prevent that back-rest 3 from rearward stretching out like this while the back-rest 3 that fell.On the other hand, on one side because to change angle obliquely upward mobile seat portion 2 and leg support portion 7, so with reduced in comparison when horizontal direction moves outstanding size forwards, can reduce occupied area.In addition, because the shape of chair body 4 do not change, so the not variation of the contact position of health and back-rest 3.

The variation of embodiment 4

Fig. 6 is the variation of the embodiment of the invention 4.This variation is on the backrest 406 of embodiment 4, appends near be configured in seat portion 2 and back-rest 3 boundarys pinion 469a, closes and be configured in tooth bar 469b on the support portion 405 with above-mentioned pinion 469a Nogami.

With wheel 462 arranged coaxial pinion 469a, and by motor 464 one rotations driving pinion 469a and wheel 462.This pinion 469a and wheel 462 can only drive wheel 462, also can a driving pinion 469a.In addition, also can not establish wheel 462, utilize pinion 469a to support chair body 4.

Embodiment 5

Fig. 7 is the schematic diagram of the chair of the embodiment of the invention 5.This embodiment 5, different with the structure of the support portion of embodiment 4 and actuator, but other structures are identical with embodiment 4.That is, support portion 505 is not a frame structure, be the blocks that has left and right sides rail walls 551 and link the diapire 552 of rail walls 551 lower ends, the left and right sides, and rail walls 551 is top higher.Backrest 506, has the linkage component 61 that links support portion 505 and back-rest 3, and be located near the seat portion 2 of chair body 4 and back-rest 3 boundarys, as the wheel 462 of moving part, the wheel 462 of back-rest 3 lower ends can rolling on left and right sides rail walls 551.

And actuator 64 is not rotary, but stretching structure similarly to Example 1, actuator 64 is installed between support portion 505 and the back-rest 3.In illustrated example, the upper end of actuator 64 be arranged on the central frame 44 that is positioned at back-rest 3 short transverse centre positions and link.Central frame 44 is crossed between the left and right sides of back-rest 3 framework 41,41.In addition, the lower end of actuator 64 can be attached on the diapire 552 of support portion 505 flexibly rotationally.

According to the chair of embodiment 5, when falling back-rest, actuator 64 is shunk.When actuator 64 shrank, wheel 462 forwards rolled along left and right sides rail walls 551 and moves, and when forwards moved back-rest 3 lower ends, back-rest 3 was drawn by linkage component 61 and the angle of the regulation of falling.Forwards to move, can prevent that back-rest 3 from rearward stretching out like this while the back-rest 3 that fell.On the other hand, because the angle of the seat portion 2 of having fixed chair body 4 and leg support portion 7 and seat portion 2 and back-rest 3, so

seat portion

2 and 7 of leg support portions have been raised the part that back-rest 3 had been fallen upward.In addition, even fell back-rest 3, the shape of chair body 4 does not change yet, so the contact position of health and back-rest 3 does not change.

The variation of embodiment 5

Fig. 8 is the variation of the embodiment of the invention 5.This variation is that actuator 64 is installed between support portion 505 and the seat portion 2.As shown in the figure, the upper end of actuator 64 links with the central frame 45 that is located at seat portion 2 leading sections.And the lower end of actuator 64 can be flexibly links with the diapire 552 of support portion 505 rotationally.

When falling back-rest 3, shown in Fig. 8 (B), (C), make actuator 64 elongations.When actuator 64 elongations, the front end of seat portion 2 lifts, and when forwards moved back-rest 3 lower ends, back-rest 3 was drawn and the predetermined angular that fell by linkage component 61.

Embodiment 6

Fig. 9 is the schematic diagram of the chair of the embodiment of the invention 6.This embodiment 6, the chair body is the same with embodiment 1, but the structure of backrest is different basically.That is, backrest 606 has the quadric chain 661 of the seat portion 2 that links chair body 4 and support portion 605 and the actuator 64 of the stretching structure that is provided with along the diagonal of this quadric chain 661.

Quadric chain 661, constitute by the front link parts 662 of pair of right and left and the rear link parts 663 of pair of right and left, front link parts 662 be installed in chair body 4 seat portion 2, between the forward a little position and support portion 605 of central authorities, rear link parts 663 are installed in seat portion 2 and back-rest 3 boundarys are neighbouring and the centre position of support portion 605 between.

The upper end of front link parts 662 and rear link parts 663, can be attached at rotationally flexibly on the fixed head 662a on left and right sides framework 41b, the 41b that is fixed in seat portion 2, the lower end of front link parts 662 and rear link parts 663 can be attached on the support portion 605 flexibly rotationally by bearing.

Front link parts 662 are longer than rear link parts 663, in the position that back-rest 3 erects, shown in Fig. 9 (B), front link parts 662 all are the posture of upper end than lower end tilted rearward with rear link parts 663, and rear link parts 663 rearward angles of inclination are little.When being that fulcrum makes front link parts 662 and rear link parts 663 counter clockwise direction when rotation in figure with the lower end, the rotational angle of rear link parts 663 is big, be in the maximum position that fell at back-rest 3, the upper end of front link parts 662 is ground, no show extreme higher position tilted rearward also, but the upper end of rear link parts 663 is in the posture of inclination forwards by extreme higher position and upper end, forwards moved with rearward the fall lower end of action time back-rest 3 of back-rest 3, and carried out the action that the front end with seat portion 2 lifts upward.

Actuator 64, the same with embodiment 1 is expansion actuator, in Fig. 9 (B) side view (C), be configured between the upper end position of the lower end position of front link parts 662 and rear link parts 663 with being tilted, the front end of actuator 64 can be attached on the bearing 651 that is fixed on the support portion 605 flexibly rotationally, and the rear end of actuator 64 can be attached near seat portion 2 central frame 43 central authorities with back-rest 3 boundarys that are arranged at chair body 4 flexibly rotationally.

Below, the effect of present embodiment 6 is described.The posture that Fig. 9 (B) expression back-rest erects.Actuator 64 is long status of stretching under this state, when falling back-rest 3, actuator 64 is shunk.When actuator 64 shrinks, because rear link parts 663 and front link parts 662 are simultaneously to counterclockwise rotating, the displacement upward of the upper end of front link parts 662 is bigger than the upper end of rear link parts 663, and rear link parts 663 displacement forwards is bigger than front link parts 662 displacement forwards, so back-rest 3 rearward fell on one side and forwards moved on one side, the front end of seat portion 2 lifts upward, can prevent that back-rest 3 from rearward stretching out and can dwindle occupied area.

Though chair of the present invention is suitable for the massage armchair that back-rest possesses massage apparatus, is not limited to massage armchair, can be applicable to the various chairs of the action of falling.In addition, in the above-described embodiments, be that the chair with band leg support portion is that example has illustrated chair of the present invention, mode also can be applicable to the chair of not being with the leg support portion but this falls.

Claims

1. chair has: be provided with the chair body of seat portion and back-rest and from the support portion of this chair body of supported underneath, it is characterized in that:

Be provided with backrest, this backrest under the state that the angle of described seat portion and back-rest is fixed, forwards moves described seat portion and back-rest in action that described back-rest was rearward fallen.

2. chair according to claim 1, it is characterized in that: described backrest has: link near the bend of the linkage component of described support portion and back-rest, the seat portion that is located at the chair body and back-rest moving part, direction is installed the orbit portion of this moving part flexibly movably and can be changed the actuator of chair body posture forwards, backwards.

3. chair according to claim 2 is characterized in that: described actuator is a stretching structure, and the moving part of an end and described chair body links, and the other end and support portion link.

4. chair according to claim 2 is characterized in that: described actuator is a stretching structure, and is linked between described support portion and the seat portion.

5. chair according to claim 2 is characterized in that: described actuator is a stretching structure, and is linked between described support portion and the back-rest.

6. chair according to claim 1, it is characterized in that: on described support portion, front and back are provided with front support pin and back support pin with leaving, have on the backrest: be located at the anterior moving part on the described front support pin, along described seat portion setting and forwards, backwards direction assembled the anterior orbit portion of described anterior moving part flexibly movably, be located at the rear portion moving part on the described back support pin, along the back-rest setting and forwards, backwards direction assembled the rear portion orbit portion of described rear portion moving part flexibly movably, and be linked to telescopic actuator between described chair body and the support portion, utilize the flexible of actuator can change chair body posture.

7. chair according to claim 6 is characterized in that: described actuator is linked between the front support pin and chair body seat portion of described support portion.

8. chair according to claim 1, it is characterized in that: be provided with the supporting walls that is positioned at about the chair body on the described support portion, be provided with on the backrest: be located at anterior moving part and rear portion moving part on supporting walls and chair body one side, with be located at that the opposing party goes up and forwards, backwards direction support described anterior moving part and rear portion moving part flexibly movably, and along with the chair body towards the place ahead and to respect to the anterior moving part of rear portion moving part top guiding, the track that the posture of back-rest was rearward fallen, and be linked between chair body and the support portion and can change the telescopic actuator of chair body posture.

9. chair according to claim 8 is characterized in that: described track is provided in a side of the rail groove on the supporting walls, and anterior moving part and rear portion moving part are the protuberances that can be embedded in slidably flexibly in the rail groove.

10. chair according to claim 8 is characterized in that: guide the track of described rear portion moving part, have the gradient of step-down forwards, guide the track of anterior moving part, have the gradient that forwards uprises.

11. chair according to claim 9 is characterized in that: guide the track of described rear portion moving part, have the gradient of step-down forwards, guide the track of anterior moving part, have the gradient that forwards uprises.

12. chair according to claim 1 is characterized in that: described backrest has: link the quadric chain of the seat portion of chair body and support portion and be located at the expansion actuator of this quadric chain diagonal.

13. chair according to claim 1, it is characterized in that: described backrest has near the moving part of the bend that links described support portion and the linkage component of back-rest, the seat portion that is located at the chair body and back-rest and makes the actuator of the posture change of chair body.

14. chair according to claim 13 is characterized in that: be provided with the wheel of the contact of rolling on described moving part, described actuator is the rotary actuator that rotation drives described wheel.

15. chair according to claim 13 is characterized in that: in described backrest, be provided with the tooth bar that is disposed near the pinion the boundary of seat portion and back-rest and is disposed at the support portion and closes with described little tooth wheel Nogami.

16., it is characterized in that: be applicable to the massage armchair that has massage apparatus at back-rest according to any described chair in the claim 1～15.