CN1713841A - Structure of chair backrest - Google Patents

Structure of chair backrest Download PDF

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Publication number
CN1713841A
CN1713841A CN 200380101142 CN200380101142A CN1713841A CN 1713841 A CN1713841 A CN 1713841A CN 200380101142 CN200380101142 CN 200380101142 CN 200380101142 A CN200380101142 A CN 200380101142A CN 1713841 A CN1713841 A CN 1713841A
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CN
China
Prior art keywords
backboard
body framework
framework
angle
bend
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN 200380101142
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Chinese (zh)
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CN100420404C (en
Inventor
中村贵士
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kokuyo Furniture Co Ltd
Takano Co Ltd
Original Assignee
Kokuyo Furniture Co Ltd
Takano Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2002299716A external-priority patent/JP2004129966A/en
Priority claimed from JP2002299697A external-priority patent/JP4185754B2/en
Application filed by Kokuyo Furniture Co Ltd, Takano Co Ltd filed Critical Kokuyo Furniture Co Ltd
Publication of CN1713841A publication Critical patent/CN1713841A/en
Application granted granted Critical
Publication of CN100420404C publication Critical patent/CN100420404C/en
Anticipated expiration legal-status Critical
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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/36—Support for the head or the back
    • A47C7/40—Support for the head or the back for the back
    • A47C7/46—Support for the head or the back for the back with special, e.g. adjustable, lumbar region support profile; "Ackerblom" profile chairs
    • A47C7/462—Support for the head or the back for the back with special, e.g. adjustable, lumbar region support profile; "Ackerblom" profile chairs adjustable by mechanical means

Abstract

A structure of a chair backrest that can be used with a back board set at a preferred angle of bend. The structure comprises a back support member (61) having a first back frame (1) tiltably attached to a seat-receiving member (8) and a second back frame (5) tiltably attached to the first back frame (1), and comprises a back board (2) having a back board-bending region (2e), a back board upper portion (2a) positioned more upward than the back board-bending region (2e), and a back board lower portion (2b) positioned more downward than the back board-bending region (2e). The back board lower portion (2b) is fixed to the first back frame (1), and the back board upper portion (2a) is supported by the second back frame (5). The back board (2) is bendable forward by deforming the back board-bending region (2e). A bending angle-adjusting mechanism (3) is provided in the structure, and the mechanism makes it possible that an angle of bend of the back board is varied and fixed by adjusting the tilt angle of the second back frame (5) with respect to the first back frame (1).

Description

The backrest structure of chair
Technical field
The present invention relates to the back structure.In more detail, the present invention relates to make the improvement of the supporting structure of the deformable backboard of back rest shape.
Background technology
In the past, the known force mechanism that a kind of basis person's of taking a seat body weight arranged made the backrest structure (EP0591933A) of the chair of backboard bending.This backrest structure as shown in figure 46, utilize 103 pairs on axle to carry out a back of the body pole 101 of supporting to the backboard 102 of strain and be provided with slotted hole 104 towards front and back, insert slotted hole 104 by the pin 105 that will be installed in backboard 102 lower ends, the lower end of backboard 102 can be connected with back of the body pole 102 movablely.In addition, between back of the body pole 101 and backboard 102, be provided with the spring 106 of backboard 102 towards the place ahead application of force.
Back of the body pole 101 can be installed on the seat board 107 with fascinating, by not shown spring mechanism all the time towards the direction application of force of standing up.The application of force that back of the body pole 101 overcomes spring mechanism is fascinated, so when the person of taking a seat leans against on the backboard 102 gently, carry on the back pole 101 and tilt less towards the rear.And when the person of taking a seat firmly leaned against on the backboard 102, back of the body pole 101 was tilted bigger towards the rear.
When the person of taking a seat leans against on the backboard 102, then the middle and upper part, upper and lower of backboard 102 is urged heavylier, and shown in the double dot dash line of Figure 46, backboard 102 is to fascinate so that upper side is toppled over towards the rear in the center with axle 103.At this moment, the lower end of backboard 102 is connected with back of the body pole 101 by pin 105, thus can't move towards the place ahead, in slotted hole 104 towards above mobile.Therefore, the below of axle 103, outstanding towards the place ahead by middle body in the bottom of backboard 102, backboard 102 bulk deformations are crooked shape.
When the person of taking a seat leans against on the backboard 102 lightly, then backboard 102 is crooked less, leans on heavyly that then backboard 102 bendings must be bigger.That is, the angle of bend of backboard 102 changes with the intensity that the person of taking a seat leans against on the backboard 102.
But in the above-mentioned backrest structure, because the angle of bend of backboard 102 changes with the intensity that the person of taking a seat leans on, when the person of taking a seat firmly leans on when back of the body pole 101 is tilted greatly towards the rear, backboard 102 is crooked serious.Therefore, can't under backboard 102 crooked less states, back of the body pole 101 be tilted towards the rear significantly.
In addition, the person of taking a seat leans on when making less towards the rear inclinations of back of the body pole 101 gently, can't make backboard 102 bending greatly.Therefore, can't make back of the body pole 101 less ground tilted rearward under the bigger state of backboard 102 bendings making.
And, as long as the person of taking a seat does not lean against on the backrest, just can't make backboard 102 bendings, keep its state.That is, can't be set at angle of bend under the state of angle of hobby and use chair backboard 102.
In addition, as deformable traditional backrest structure, for example, there is a kind of Japan Patent spy to drive the chair that discloses for 2000-23778 number the shape of backrest.This chair is carried on the back pole and is made of the upper boom 201 and the lower frame 202 of on-deformable rigid body respectively for 1 group about being configured in as shown in figure 47.Upper boom 201 props up member 203 with lower frame 202 by pivot and is connected variable-angle.In addition, the carriage 204 of on-deformable rigid body is installed near the upper end of upper boom 201 variable-angle, the band-like body 205 as deflection reinforcement material, that formed by rubber-like materials such as resins is installed between carriage 204 and lower frame 202.Backboard 206 clips left and right sides band-like body and is installed on carriage 204 and the lower frame 202.
Backboard 206 is made of lower case 206b and upper body 206c, is that the boundary connects flexiblely with bend 206a.When the person of taking a seat leaned against on the backrest, lower case 206b moved towards the rear, and upper body 206c rotates towards the place ahead by the tension force of band-like body 205 and the elasticity of backboard 206.Therefore, for example, also can be supported the person's of taking a seat back when on leaning against backrest, seeing the monitor picture of personal computer etc. by backrest.
But, this back support structure to backboard 206 at left and right directions (width of chair) two ends non-yielding prop, even so pliability materials such as backboard 206 usefulness resins are formed, or in the centre of backboard 206 grooving etc. is set and makes backboard 206 easy deformation, in fore-and-aft direction (depth direction of chair) deformable, but can't give backboard 206 for the deflection at center and distortion with the center of the backrest axle by length direction (mainly being above-below direction), be difficult to make the backboard 206 and the person of taking a seat to follow the posture of reversing of health to be out of shape accordingly.For example, when the person's of taking a seat health leans against the right side of backrest with reversing, Yi Bian be difficult to make the backboard 206 1 edge persons' of taking a seat back to obtain backrest posture etc. towards the distortion of rear torsion ground, right side.
And this back support structure can't make the backboard distortion so that release towards the place ahead near the waist when backrest is tilted towards the rear.
Summary of the invention
The objective of the invention is to, provide a kind of state that the angle of bend of backboard can be set in the angle of hobby can use the backrest structure of the chair of chair down.In addition, the objective of the invention is to, provide a kind of basis person's of taking a seat posture to make the backrest structure of the chair that backboard is out of shape well.
In order to achieve the above object, the backrest structure of chair of the present invention comprises: have at least 1 the 1st back of the body framework can installing on the present member to undertake, the back of the body supporting frame that can be installed at least 1 the 2nd back of the body framework on the 1st back of the body framework with fascinating with fascinating; Has the backboard bending area, be positioned at the backboard top of the upside of this backboard bending area, be positioned at the backboard of backboard bottom of the downside of described backboard bending area, also comprise the angle of bend governor motion, it is fixed in described the 1st back of the body framework with in described backboard top and the described backboard bottom either party, the opposing party is by described the 2nd back of the body supporting framework simultaneously, by make the distortion of described backboard bending area make described the opposing party with respect to a described side towards front and back to toppling over, described backboard is flexible as a whole, by regulating the turning angle of described the 2nd back of the body framework with respect to described the 1st back of the body framework, but the angle of bend of described backboard is changed and the stationary curved angle.
Therefore, can operate the angle of bend governor motion is adjusted to hobby with the angle of bend with backboard angle.After the angle of bend of backboard was adjusted to the angle of hobby, operation angle of bend governor motion stationary curved angle was even angle of bend no longer changes.Even the person of taking a seat firmly leans against on the backboard, the angle of bend of backboard also can be kept by the angle of bend governor motion.Like this, can be adjusted at angle of bend under the state of angle of hobby and use, can improve the take one's seat comfortableness and the ease of use of chair backboard.
In addition, backrest structure of the present invention, the 1st back of the body framework is fixed in the backboard bottom, but backboard top fore-and-aft direction is fascinated, the angle of bend governor motion is constituted, comprising: lower end and the 1st back of the body framework are connected and the upper end is that framework the 2nd is carried on the back towards front and back to what can fascinate in the center with this tie point; The jockey that upper end and the backboard top of the 2nd back of the body framework is connected and absorbs their relative displacement; Be arranged on the position of leaving the tie point between the 1st back of the body framework and the 2nd back of the body framework and make the 1st back of the body framework and the 2nd carry on the back the gearshift that the distance between the framework changes.
Therefore, change when the operative position moving device makes the distance of the 1st back of the body framework and the 2nd back of the body framework, then the 2nd back of the body framework fascinates with respect to the 1st back of the body framework.Because the upper end of the 2nd back of the body framework is connected with backboard top, so the angle of bend of backboard changes because of the 2nd fascinating of framework of the back of the body.At this moment, because the amount of movement of the upper end of the 2nd back of the body framework is different with the amount of movement of the coupling part of the 2nd back of the body framework of backboard, so produce relative displacement between the 2nd back of the body framework coupling part of the upper end of the 2nd back of the body framework and backboard, but, this relative displacement is connected and partially absorbs, and makes fascinating of the 2nd back of the body framework slick and sly with the bending of backboard.That is, can regulate the angle of bend of backboard, the angle of bend of backboard is adjusted to the angle of hobby with simple adjusting operation by the operation of gearshift.In addition, can by jockey absorb the 2nd back of the body framework upper end and backboard the 2nd carry on the back the relative displacement that produces between the framework coupling part, thereby can constitute mechanism.
In addition, the backrest structure of chair of the present invention comprises: deformable backboard; At least at least 1 back of the body supporting member forming by the pliability resin of the part that is connected with described backboard.Therefore, when the person of taking a seat leaned against on the backboard, back of the body supporting member was according to the load size, direction and the position that apply and deflection makes the backboard easy deformation simultaneously, thereby backboard can follow the person's of taking a seat posture and trend distortion, can improve the comfortableness of backrest.
In addition, back structure of the present invention has the jockey that upper end and the top of backboard of back of the body supporting member is connected and absorbs their relative displacement.This occasion when making backboard distortion, produce relative displacement between the upper end of then carrying on the back supporting member and the back of the body supporting member coupling part of backboard, but the coupling part absorbs this relative displacement, can make that backboard is bigger to be out of shape more sleekly.That is, can absorb the relative displacement of back of the body supporting member and backboard by jockey.Therefore, can prevent from the coupling part of back of the body supporting member and backboard is applied irrational power, can make more easy deformation of backboard, further improve the comfortableness of backrest.
In addition, the backrest structure of chair of the present invention comprises: have at least 1 the 1st back of the body framework can installing on the present member to undertake, the back of the body supporting frame that can be installed at least 1 the 2nd back of the body framework on the 1st back of the body framework with fascinating with fascinating; Have the backboard bending area, be positioned at the upside of this backboard bending area backboard top, be positioned at the downside of described backboard bending area and be fixed in the backboard of backboard bottom of described the 1st back of the body framework 1; And the jockey that upper end and the described backboard top of described the 2nd back of the body framework is connected and absorbs their relative displacement, by making described backboard bending area distortion, make described backboard top with respect to described backboard bottom towards front and back to toppling over, described backboard is flexible as a whole, at least the described backboard upper deformable of described backboard, simultaneously described the 2nd back of the body framework is formed by flexual resin.
Therefore, when the person of taking a seat leans against on the backboard, the 2nd the back of the body framework fascinated in backboard top, thereby can make backboard with the backboard bending area be the center towards front and back to bending.Simultaneously, can make backboard easily according to the 2nd back of the body load size, direction and the position that apply of framework and deflection, the posture that makes backboard follow the person of taking a seat is easily followed distortion or the local deformation of reversing, and can improve the comfortableness of backrest.
In addition, the backrest structure of chair of the present invention comprises: have at least 1 the 1st back of the body framework can installing on the present member to undertake, the back of the body supporting frame that can be installed at least 1 the 2nd back of the body framework on the 1st back of the body framework with fascinating with fascinating; And has a backboard bending area, be positioned at the backboard top of the upside of this backboard bending area, be positioned at the downside of described backboard bending area and be fixed in the described the 1st and carry on the back the backboard of the backboard bottom of framework 1, also comprise the angle of bend governor motion, it is by making described backboard bending area distortion, make described backboard top with respect to described backboard bottom towards front and back to toppling over, described backboard is flexible as a whole, by regulating the turning angle of described the 2nd back of the body framework with respect to described the 1st back of the body framework, but the angle of bend of described backboard is changed and the stationary curved angle, simultaneously, described angle of bend governor motion comprises: the lower end is connected with described the 1st back of the body framework, and the upper end with this tie point be the center towards front and back to can fascinate described the 2nd the back of the body framework; The jockey that upper end and the described backboard top of described the 2nd back of the body framework is connected and absorbs their relative displacement; Be arranged on the position of leaving the described tie point between described the 1st back of the body framework and described the 2nd back of the body framework and make described the 1st back of the body framework and the described the 2nd carry on the back the gearshift that the distance between the framework changes, at least the described backboard upper deformable of described backboard, simultaneously described the 2nd back of the body framework is formed by flexual resin.
In this occasion, when the person of taking a seat leaned against on the backboard, the 2nd back of the body framework was according to the load size, direction and the position that apply and deflection makes the backboard easy deformation simultaneously.That is, can suppress of the obstruction of the 2nd back of the body framework, thereby posture and trend that backboard can be followed the person of taking a seat carry out the part or follow the distortion of reversing, can improve the comfortableness of backrest backboard distortion.In addition, operation angle of bend governor motion can be the angle that the fore-and-aft direction angle of bend at center is adjusted to hobby with the bending area with backboard.After the angle of bend of backboard was adjusted to the angle of hobby, as this angle of bend is fixed, even then the person of taking a seat firmly leans against on the backboard, the angle of bend of backboard also can be kept by the angle of bend governor motion.
That is, change when the operative position moving device makes the distance of the 1st back of the body framework and the 2nd back of the body framework, then the 2nd back of the body framework fascinates with respect to the 1st back of the body framework.Because the upper end of the 2nd back of the body framework is connected with backboard top, so the angle of bend of backboard changes because of the 2nd fascinating of framework of the back of the body.At this moment, because the amount of movement of the upper end of the 2nd back of the body framework is different with the amount of movement of the coupling part of the 2nd back of the body framework of backboard, so produce relative displacement between the 2nd back of the body framework coupling part of the upper end of the 2nd back of the body framework and backboard, but, this relative displacement is connected and partially absorbs, and makes fascinating of the 2nd back of the body framework slick and sly with the bending of backboard.
That is, can regulate the angle of bend of backboard, the angle of bend of backboard is adjusted to the angle of hobby with simple adjusting operation by the operation of gearshift.In addition, can by jockey absorb the 2nd back of the body framework upper end and backboard the 2nd carry on the back the relative displacement that produces between the framework coupling part, thereby can constitute mechanism.
In addition, the backrest structure of chair of the present invention, gearshift comprises: be arranged on the adjustment screw on either party in the 1st back of the body framework and described the 2nd back of the body framework; Be arranged on the opposing party, have a female threaded member of the screw that inserts adjustment screw: but the angle changeable device that the angle above-below direction of at least one side in adjustment screw and the female threaded member is changed.
Therefore, when the rotary manipulation adjustment screw, the interior amount of screw that then screws in female threaded member will change.Therefore, change with the 1st back component of position of the tie point of the 2nd back of the body framework and the distance between the 2nd back component leaving the 1st back of the body framework, the 2nd turning angle of carrying on the back framework changes, and the angle of bend of backboard changes.That is,, can regulate the angle of bend of backboard by the rotary manipulation adjustment screw.In addition, along with the variation of the angle of bend of the 2nd back of the body turning angle of framework and backboard, the adjustment screw of gearshift and the relative angle of screw also change, but the angle changeable device absorbs this variation, so there is not irrational masterpiece to be used for gearshift, can be with light power operation.
In addition, back structure of the present invention, jockey comprises: the axial region with profile of the circle that forms in the upper end at least of the 2nd back of the body framework; With respect to axial region rotation freely and at the connecting portion that endwisely slips freely; And connecting portion freely is installed in axle device described backboard on towards upper and lower to rotation with respect to backboard, connecting portion has not can be from the come off length of degree of axial region.
Therefore, the axial relative displacement of the 2nd back of the body framework for example can be slided vertically with respect to axial region by the connecting portion of cover shape and be absorbed.In addition, the angle variation of the above-below direction of the 2nd back of the body framework and backboard can be by connecting portion with respect to backboard towards upper and lower to rotation, promptly angle changes and absorbs.And the angle of the horizontal direction of the 2nd back of the body framework and backboard changes and can absorb by the rotation of connecting portion with respect to axial region.That is, can distinguish the angle variation that the horizontal direction of the angle variation of the above-below direction of framework and backboard, the 2nd back of the body framework and backboard is carried on the back in the axial relative displacement, the 2nd that absorbs the 2nd back of the body framework well.
In addition, back structure of the present invention, jockey comprises: the axial region with profile of the circle that forms in the upper end at least of the 2nd back of the body framework; The back side and the axial region that is arranged on backboard inserts, forms the axle carrier of the insertion mouth that allows this axial region inclination from the below; And be arranged on a carrier the top, mark off the member in the space that the front end that allows axial region moves.
Therefore, move vertically with respect to the axle carrier, thereby absorb the 2nd axial relative displacement of carrying on the back framework by axial region.In addition, the angle of the above-below direction of the 2nd back of the body framework and backboard changes and the angle of left and right directions changes and can mouthful smash sauce and move and absorb with respect to inserting by axial region.And the angle variation of the horizontal direction of the 2nd back of the body framework and backboard can be rotated with respect to the axle carrier by axial region and be absorbed.Its result can improve the free degree of motion of the coupling part of the 2nd back of the body framework and backboard.In addition, can reduce the number of building block, reduce manufacturing process thus, can reduce manufacturing cost.
In addition, back structure of the present invention by form 1 grooving at least at the backboard bending area, makes backboard top or Ke Chao front and back, backboard bottom to fascinating.This occasion, the grooving rigidity is local to descend backboard because of existing, and is backboard bending area easy deformation in this part that rigidity is descended, can make backboard top or backboard bottom easily towards front and back to fascinating.That is, can with simple structure make backboard towards front and back to bending.This occasion as the shape of grooving being made at least towards the outstanding shape of direction U font for example, then can make the outstanding support portion that forms of a part of backboard.In addition, by the shape of grooving is made rectilinear form, can prevent that the part of backboard is outstanding.The backboard bending area also comprises final diastrophic zone sometimes in order to make backboard and to carry out bending in position arbitrarily and deliberately forming, and forms between the standing part of backboard and coupling part.
In addition, back structure of the present invention is rotatably installed in the upper end of backboard with the supporting member of auxiliary backrest, and supporting member and the 1st back of the body framework be connected by connecting rod, and the bending of supporting member and backboard is rotated linkedly.Therefore, even lean against the posture that head etc. erects on the backboard, also can be supported head etc. by supporting member while the person of taking a seat adopts.Therefore, can improve the ease of use of chair.
And, back structure of the present invention, resin also has the nylon of glass.
The simple declaration of accompanying drawing
Fig. 1 is the cutaway view of an example of the backrest structure of expression chair of the present invention.
Fig. 2 is the backrest structure of the same chair of expression, makes the cutaway view of backboard than the state of macrobending.
Fig. 3 is the rearview of backboard of the backrest structure of the same chair of expression.
Fig. 4 is the jockey of the backrest structure of the same chair of expression, is the square from it cutaway view of seeing.
Fig. 5 is a same jockey of expression, is the cutaway view of seeing from its side.
Fig. 6 is the cutaway view of the 1st example of gearshift of the backrest structure of the same chair of expression.
Fig. 7 is a same gearshift of expression, is to make the cutaway view of backboard than the macrobending state.
Fig. 8 is the stereogram of the angle changeable device of the same gearshift of expression.
Fig. 9 is the vertical view that expression is installed in the gas spring on the same backrest structure.
Figure 10 is the side view of the same gas spring of expression.
Figure 11 is the rearview of cover plate of the backrest structure of the same chair of expression.
Figure 12 is that expression will be installed in the rearview of the situation on the backboard with upper cover plate.
Figure 13 is the side view of other examples of the jockey of the expression backrest structure that constitutes chair of the present invention.
Figure 14 is the cutaway view of the 2nd example of gearshift of the backrest structure of the same chair of expression.
Figure 15 is the 2nd example of the same gearshift of expression, is to make the cutaway view of backboard than the macrobending state.
Figure 16 is the cutaway view of the 3rd example of gearshift of the backrest structure of the same chair of expression.
Figure 17 is the 3rd example of the same gearshift of expression, is to make the cutaway view of backboard than the macrobending state.
Figure 18 is the cutaway view of the 4th example of gearshift of the backrest structure of the same chair of expression.
Figure 19 is the 4th example of the same gearshift of expression, is to make the cutaway view of backboard than the macrobending state.
Figure 20 is the side view of the 1st variation of the backrest structure of expression chair of the present invention.
Figure 21 is the 2nd example of backrest structure of expression chair of the present invention, and the bottom that expression makes backboard is the side view of the moving state of square neck forward.
Figure 22 is the figure of user mode of the chair of expression Figure 20.
Figure 23 is the figure of user mode of the same chair of expression, and the bottom that expression makes backboard is the figure of the moving state of square neck forward.
Figure 24 is the side view of the 3rd example of the backrest structure of expression chair of the present invention.
Figure 25 is the 2nd variation of backrest structure of expression chair of the present invention, is the bottom side view of the moving state of square neck forward that expression makes backboard.
Figure 26 is the cutaway view of the 4th example of the backrest structure of expression chair of the present invention.
Figure 27 is the user mode of chair that the backrest structure of Figure 26 has been used in expression, is the figure of expression child situation about using.
Figure 28 is the user mode of chair that the backrest structure of Figure 26 has been used in expression, is the figure of expression adult situation about using.
Figure 29 has represented to use the 5th example of the backrest structure of chair of the present invention, is with the cutaway view of mobile state towards the rear of resting the head on.
Figure 30 represents the 5th example of the backrest structure of the same chair, is the cutaway view with the state that moves towards the place ahead of headrest.
Figure 31 has represented to use the user mode of chair of the backrest structure of Figure 29, is the cutaway view of state that headrest is moved towards the rear.
Figure 32 has represented to use the user mode of the chair of the same backrest structure, is that headrest is moved towards the place ahead, make backrest integral body against the figure of state.
Figure 33 is illustrated in the rearview that the situation of step is set on the grooving of backboard.
Figure 34 is the rearview that is illustrated in the situation that 2 undercut grooves are set on the backboard.
Figure 35 is the rearview that is illustrated in the situation that 1 undercut groove is set on the backboard.
Figure 36 is the cutaway view of other examples of the expression jockey that constitutes the backrest structure used chair of the present invention.
Figure 37 is the concept map that is used to illustrate the motion of inserting degree of lip-rounding shape and protuberance.
Figure 38 is the cutaway view of the another example of the expression jockey that constitutes the backrest structure used chair of the present invention.
Figure 39 represents the 6th example of the backrest structure of chair of the present invention, has the person's of taking a seat shoulder blade part to the supporter that head supports as supporting member, makes the figure of the state that this supporter moves towards the rear.
Figure 40 represents the 6th example of the same backrest structure, is that supporter is moved towards the place ahead, make backrest integral body against the figure of state.
Figure 41 is the stereogram of situation of the top torsional deflection of backboard.
Figure 42 is the backboard central authorities stereograms of the situation of outstanding distortion towards the rear.
Figure 43 is the one-sided stereogram of the situation of outstanding distortion towards the rear of backboard.
Figure 44 is the 1st back of the body framework, the backboard of the 7th example of backrest structure of expression chair of the present invention and the summary structure chart of the 2nd back of the body framework.
Figure 45 is the 7th example of backrest structure of expression chair of the present invention, be make backboard against the summary structure chart of the 1st back of the body framework, backboard and the 2nd back of the body framework of state.
Figure 46 is the side view of the backrest structure of the traditional chair of expression.
Figure 47 is the side view of the backrest structure of other traditional chairs of expression.
The specific embodiment
Below, with reference to optimal morphology shown in the drawings structure of the present invention is elaborated.But, same member in each example is put on prosign, and the repetitive description thereof will be omitted.
Fig. 1～Figure 12 represents the 1st example of the backrest structure of chair of the present invention.The backrest structure of this chair (hereinafter to be referred as backrest structure) has back of the body supporting member 61 and backboard 2, wherein, this back of the body supporting member 61 has at least 1 the 1st back of the body framework 1 can installing on the present member to undertake 8 with fascinating and can be installed at least 1 the 2nd back of the body framework 5 on the 1st back of the body framework 1 with fascinating, and this backboard 2 has backboard bending area 2e, at the backboard bottom 2b of the downside of backboard top 2a, the backboard bending area 2e of the upside of this backboard bending area 2e.Among backboard top 2a and the backboard bottom 2b either party is fixed in the 1st back of the body framework 1, the opposing party is supported on the 2nd back of the body framework 5, by with backboard bending area 2e being the center distortion, make backboard top 2a or backboard bottom 2b with respect to backboard bottom 2b or backboard top 2a towards front and back to inclination, backboard 2 is flexible as a whole.
The backrest structure of this example, backboard bottom 2b is fixed on the 1st back of the body framework 1, backboard top 2a can be connected also supported with the 2nd back of the body framework 5 at fore-and-aft direction simultaneously, by make backboard top 2a with respect to backboard bottom 2b towards front and back to inclination, make backboard bending area 2e distortion, backboard 2 is that the center is provided with flexiblely with bending area 2e.But, backboard 2 is not limited to above-mentioned example with respect to the installation relation of back of the body supporting member 61, but also backboard top 2a is fixed on the 1st back of the body framework 1, and backboard bottom 2b is supported on the 2nd back of the body framework 5 simultaneously.
The back of the body supporting member 61 of the supporting backrest in the backrest structure of this example, constitute by 1 the 1st back of the body framework 1 and 1 the 2nd back of the body framework 5, wherein, the 1st back of the body framework 1 integratedly constitutes by installing swingably that 2 side plate 1d and backboard assembly wall 1f and stiffener 1g etc. on the present member to undertake 8 are connected, and the 2nd carry on the back framework 5 and integrated constitute by being installed in respectively that the 1st club of carrying on the back 2 rigid bodies such as steel pipe on the side plate 1d of framework 1 is connected with connecting plate 11,12 with fascinating.
In addition, backrest structure has angle of bend governor motion 3, and this angle of bend governor motion 3 is by regulating and fixedly make the angle of bend variation of backboard 2 and stationary curved angle to the 2nd back of the body framework 5 with respect to the turning angle of the 1st back of the body framework 1.The angle of bend governor motion 3 of this example is a structure of utilizing feed screw mechanism, the variable spaced between the 1st back of the body framework 1 and the 2nd back of the body framework 5.That is, the 2nd back of the body framework 5 is arranged to, and its lower end is connected by the rear end of pin 4 with the 1st back of the body framework 1, is that the center can be towards front and back to fascinating with this connecting pin 4.Angle of bend governor motion 3 is connected the 1st back of the body framework 1 by the 2nd back of the body framework 5, with the jockey 6 that is connected with backboard top 2a of upper end of the 2nd back of the body framework 5, in the position of the pin 4 that leaves connection and makes the 1st to carry on the back the gearshift 7 that changes apart from the interval that framework 1 and the 2nd carries on the back between the framework 5 and constitute with the 2nd back of the body framework 5.
The 1st back of the body framework 1 can fascinate on the present member to undertake 8 of ground 3 installations.The backboard bottom 2b of backboard 2 is fixed in the 1st back of the body framework 1.The 1st back of the body framework 1 is installed on the present member to undertake 8 swingably by connecting pin 81, applies the power that erects all the time by the 83 pairs of backboards 2 in reaction force unit that are contained on the member to undertake 8.Seat member to undertake 8 has slotted hole 85 in front, and axle 84 is connected this slotted hole 85, can support movably forward and backward seat 9.The rear end side hook of seat 9 is on the axle 82 that connects back of the body supporting member 61 and by 61 supportings of back of the body supporting member.Therefore, along with fascinating of seat supporting member 61 moves forward and backward, rear side is sunk or lift.
Backboard bottom 2b utilizes backboard assembly wall 1f to fix by screw or Screw.In addition, the member of putting on symbol 1g among the figure be connect about the connecting elements of the 1st back component 1.
Backboard 2 for example is made of the pliability material.In this example, for example backboard 2 is by ester mouldings such as polypropylene, nylon.But, the resin that becomes the material of backboard 2 is not limited thereto, and backboard 2 also can be by the material forming beyond the resin.In this example, backboard 2 by by have flexual material for example resin etc. constitute, thereby flexible, but also can utilize hinge etc. to connect backboard top 2a and backboard bottom 2b, make backboard 2 flexible.This occasion, hinge are exactly backboard bending area 2e.As hinge, for example, can use and the backboard top 2a of backboard 2 or backboard bottom 2b is integrally formed and the resin that uses resin than the material that constitutes backboard top 2a and backboard bottom 2b to have more flexibility forms resin hinge, in addition, can use with the backboard top 2a of backboard 2 or backboard bottom 2b is integrally formed and thin by making wall ratio backboard top 2a and backboard bottom 2b, make it have the hinge of flexibility.
Under the situation of this example, backboard 2, its both side edges portion is by towards the place ahead bending, but by forming grooving 10, forms easily towards front and back to the bending area 2e of bending.In this example, adopted at least towards the grooving of the outstanding shape of the direction grooving 10 of U font for example, but the shape of grooving 10 is not limited thereto, but the such shape of spade mark that also for example is reverse U shape, H font, V font and even inverted v-shaped, W shape up and down or is similar to, or other shapes with them.The ledge of the grooving 10 of backboard 3 becomes tongue piece portion 2c for upper portion in the present embodiment.
In addition, the shape of grooving 10 is not limited to illustrated U font, also rectilinear form.This occasion, grooving 10 also can for example as shown in figure 34, be provided with 2 undercut grooves 10, or 1 undercut groove 10 is set as shown in figure 35, even the grooving 10 more than 3 can be set as long as there is 1.Like this, form grooving 10 and easy deformation, can make backboard top 2a above the bending area 2e or following backboard bottom 2b with bending area 2e be the center towards front and back to fascinating.At this, bending area 2e is meant that backboard 2 is fixed in the position of the 1st back of the body framework 1 and is connected zone between the position on the 2nd back component 5.More particularly, bending area 2e is meant grooving 10 or has near the hinge with grooving 10 identical functions zone, and being speculated as roughly is by the zone of strain energetically in the scope shown in the imaginary line among Fig. 3, Figure 33, Figure 34, Figure 35.But, this bending area 2e is in order to make backboard 2 flexible and intentional formation also comprises final diastrophic zone sometimes in position arbitrarily.
Shown in Fig. 3 waits, the shape of grooving 10 is made the U font with under the situation that forms tongue piece portion 2c, promptly, make under the outstanding down situation of tongue piece portion 2c, the top that makes backboard 2 is towards the rear during oblique bending, can make tongue piece portion 2c outstanding, can be supported the person's of taking a seat waist etc. by outstanding tongue piece portion 2c towards the place ahead.In addition, when not needing to make tongue piece portion 2c outstanding or make tongue piece portion 2c outstanding when not so good, the shape of grooving 10 is made rectilinear form, or with bending area 2e with continuous resin hinge formation.That is, by the shape of grooving 10 is made rectilinear form, even backboard 2 bendings can prevent that also the part of backboard 2 is outstanding.
The 2nd back of the body framework 5 with bending area 2e is being the back board part that the boundary is fixed on the opposition side of the side on the 1st back of the body framework 1, promptly, backboard top 2a rotation above the occasion bending area 2e of this example is connected on the backboard 2 freely and sliding freely, and 2a supports to backboard top.In this example, the 2nd back of the body framework 5 for example adopts circular pipe, is provided with 2 about for example, supports with the two ends to the width (horizontal direction) of backboard 2.The 2nd back of the body framework 5 is connected by 2 connecting plates 11,12.Lower end at the connecting plate 12 of downside is connected with a pair of carriage 12a, and this carriage 12a is to clamp the state configuration of the 1st back of the body framework 1 from both sides.By connecting axle (hereinafter to be referred as axle 4) being connected each carriage 12a and the 1st back of the body framework 1, the connecting plate 12 i.e. lower end of the 2nd back of the body framework 5 be that the center rotation is carried on the back framework 1 and is connected with the 1st freely with axle 4, can be with the upper end towards front and back to swing.The 2nd carries on the back 2 pipes of framework 5 usefulness connecting plates, 11,12 connections forms roughly Y shape, the arm above the connecting plate 11, and the interval between them enlarges, and the upper end is connected with the bight of the upside of backboard 2 is neighbouring by jockey 6.But, the radical of the 2nd back of the body framework 5 is not limited to 2, also more than 1 or 3.For example, the occasion of 1 the 2nd back of the body framework 5 also can support the central authorities of backboard 2, also can make T shape the two ends of backboard 2 are supported.But, pipe system the 2nd back of the body framework 5 in the left and right sides is connected by 2 connecting plates 11,12, but also can utilize 1 connecting plate to needing the scope of rigidity to connect at least as the 2nd back of the body framework 5 sometimes.In addition, the 2nd back of the body framework 5 is made of circular tubing, but also can be by the bar that does not have dirt, also square tube or square rod material sometimes.
Jockey 6 comprises for example as shown in Figure 5: the axial region 13 with profile of the circle that forms in the upper end at least of the 2nd back of the body framework 5; With respect to 13 rotations of this axial region freely and at the connecting portion 14 that endwisely slips freely; Connecting portion 14 is propped up device 15 around the axle that horizontal rotational shaft is installed on the backboard 2 freely.In this example, the shape of cross section of the 2nd back of the body framework 5 is circular pipe, so the upper end of the 2nd back of the body framework 5 constitutes axial region 13.In addition, connecting portion 14 is to leave slightly gap to be embedded in the cover with circular inner peripheral surface (hereinafter referred to as cover 14) on the axial region 13.But, be not limited to cover, for example also encircle etc. as linking part 14.In addition, the outer peripheral face shape of axial region 13 and the inner peripheral surface shape of connecting portion 14 do not need strict circle, so long as allow the shape of rotation to get final product in the required movable range between them.
Axle device 15 is by being fixed in carriage 14a on the cover 14, being fixed in carriage 2d on the backboard 2, connecting axle 16 knuckle joints that constitute that these carriages 2d, 14a and rotation connect freely.
Cover 14 is embedded on the axial region 13 from above.Bigger slightly by the internal diameter of cover 14 is made than the external diameter of axial region 13, can be freely and endwisely slipping freely with respect to axial region 13 rotation.Cover 14 has in the moving range of the 2nd back of the body framework 5 not from the come off length of degree of axial region 13.That is, though cover 14 by the 2nd back of the body framework 5 fascinate and the bending of backboard 2 is slided with respect to axial region 13, cover 14 can not come off from axial region 13 yet.
The occasion of this example, gearshift 7 is made of a certain side's who is arranged on the 1st back of the body framework 1 and the 2nd back of the body framework 5 adjustment screw 17, the female threaded member 21 that is arranged on the opposing party.Female threaded member 21 is bar-shaped, has to connect the screw 18 that its adjustment screw 17 radially screws togather, and is configured to vertical with adjustment screw 17.But female threaded member 21 and adjustment screw 17 are installed in to angular adjustment respectively on the 1st back of the body framework 1 and the 2nd back of the body framework 5.But, in this example, adjustment screw 17 is installed on the connecting plate 12 that connects the 2nd back of the body framework 5, on the 1st back of the body framework 1, is provided with female threaded member 21.
The words that illustrate in greater detail, adjustment screw 17 by thrust bearing 20 pass than this adjustment screw 17 slightly major diameter or slotted hole (long on the short transverse of backrest) be opened in hole (not shown) on the connecting plate 12, rotatable freely and adjustable tilt and position and can not be installed on the connecting plate 12 with coming off.In addition, female threaded member 21 is configured in between outstanding side plate 1d, the 1d of the backboard assembly wall 1f of the 1st back of the body framework 1, and the screw 22,22 on the same axle of its two ends and the side plate 1d, the 1d that connect the 1st back of the body framework 1 screws togather and supported.Screw 22 breakthrough forms are formed in the through hole 1e of the side plate 1d of the 1st back of the body framework 1, screw in the screw that forms at the two ends of female threaded member 21.Therefore, female threaded member 21 is that the center is rotatably supported on the 1st back of the body framework 1 by by screw 22 and the supported freely angle changeable device 19 of side plate 1d rotation with screw 22.
Screw 18 radially connects the central authorities of female threaded member rod 21.The front end of the adjustment screw 17 in screwing in screw 18 is equipped with stop plectane 23, so that adjustment screw 17 is not deviate from from screw 18.The handle 43 of operation usefulness is fixed on the end of adjustment screw 17, is arranged to utilize this handle 43 these adjustment screw 17 of rotation.
In this backrest structure, by the following method the angle of bend of backboard 2 is adjusted to the angle of hobby.
In Fig. 1 and state shown in Figure 6, when rotation adjustment screw 17, enlarge the interval of the 1st back of the body framework 1 and the 2nd back of the body framework 5 after, the 2nd to carry on the back framework 5 be to fall down towards the rear in the center with axle 4.At this moment, the upper end of the 2nd back of the body framework 5 spurs the backboard top 2a of backboard 2 towards the rear with respect to the backboard bottom 2b that is fixed in the 1st back of the body framework 1, makes backboard 2 carry out bending (Fig. 2, Fig. 7) in bending area 2e strain.
When the rotary manipulation that stops adjustment screw 17, the interval of the 1st back of the body framework 1 and the 2nd back of the body framework 5 no longer changes, so the turning angle of the 2nd back of the body framework 5 is kept necessarily, therefore, the angle of bend of backboard 2 can be kept necessarily, can use chair with this state.
In addition, when with adjustment screw 17 towards and the rotation of aforesaid operations opposition side, then the 1st back of the body framework 1 narrows down with the interval of the 2nd back of the body framework 5, the 2nd back of the body framework 5 is that the center rotates towards the place ahead backboard 2 is stood up with axle 4.Thus, can reduce the power of the 2nd back of the body framework 5, reduce the angle of bend of backboard 2 towards the direction pulling of backboard 2.That is,, can make the angle of bend reinstatement of backboard 2 as Fig. 1 and shown in Figure 6.
Like this,, the angle of bend of backboard 2 is changed by regulating the turning angle of the 2nd back of the body framework 5 with respect to the 1st back of the body framework 1, but and stationary curved angle.At this, when the 2nd back of the body framework 5 is fascinated more greatly with respect to the 1st back of the body framework 1, can make backboard 2 crooked significantly, and when the 2nd back of the body framework 5 is carried on the back framework 1 less fascinating with respect to the 1st, can make backboard 2 less ground crooked.That is, can regulate the angle of bend of backboard 2.
In the backrest structure of the present invention, the person of taking a seat leans against on the backboard 2, when making backboard 2 accept framework 8 and fascinate with respect to seat, promptly against the time, can not make the power of adjustment screw 17 rotations, so the situation of the angle of bend variation of backboard 2 can in use not take place yet.
That is, the person of taking a seat can be adjusted to the angle of bend of backboard 2 angle of hobby by the operation to adjustment screw 17, can use chair under the state of the angle that backboard 2 is bent to hobby.Its result can improve the ease of use of chair.In addition, rotate adjustment screw 17 easily, it is simple to regulate operation.Thereby can improve the ease of use of chair.
Under the big state of the angle of bend that makes backboard 2, use chair, for example, thereby the 1st back of the body framework 1 is fascinated make backrest integral body against the time, can further unfold spine, can obtain the effect that stretch at better back.
The gas spring 24 of carrying on the back the with locking mechanism midway of framework 1 by the rear end and the 1st that makes Connection Block accept framework 8 stretches, and the 1st back of the body framework 1 is fascinated with respect to seat member to undertake 8.Promptly, the gas spring 24 of the with locking mechanism that can be at an arbitrary position expanding-contracting action be limited constitutes leg-of-mutton linkage with seat member to undertake 8 and the 1st back of the body framework 1, remove gas spring 24 locking mechanism and when scalable, the 1st back of the body framework 1 can fascinate, but by making locking mechanism, for example make the locking mechanism action that stops the action gas flow, under the situation of the length of fixed gas spring 24, the 1st back of the body framework 1 is fascinated.Solid and the releasing of the length of gas spring 24 can make the mobile relief valve of prevention working gas open and close by the operation by bar 25 and carry out.This bar 25 is configured in the following side space of lateral margin of backboard 2, as long as the person of taking a seat just need not bend over towards the place ahead and can put down hand just can catch under the state on the backboard 2 will leaning against, can operate like this.Therefore, carry out bar operation easily, Yi Bian and on one side action bars 25 utilize the back to push the action of backboard 2 easily.In addition, talk about towards the left and right directions extension link 26 of chair, then can directly bar 25 be installed on this connecting rod 26, can adopt reasonable configuration as valve operating portion from gas spring 24.That is, can be installed on the chair under the Componentized state in that gas spring 24 and connecting rod 26 and bar 25 etc. are assembled in advance, make the assembling operation of chair easy.
When the angle of inclination of the 2nd back of the body framework 5 changes, the then height of adjustment screw 17 and the variation thereupon of tilting, so female threaded member 21 changes with the intersecting angle of adjustment screw 17, but make the rotation of female threaded member 21 with respect to the pitman 12 of adjustment screw 17 by micromatic setting and angle changeable device 19, adjustment screw 17 and screw 18 are disposed in a straight line all the time, can rotate adjustment screw 17 all the time sleekly.Therefore, can operate adjustment screw 17 with light power, easy to use.
When fascinating the 2nd back of the body framework 5 when regulating 3 angle of bend of backboard 2, because the amount of movement of the upper end of the 2nd back of the body framework 5 and the part of the 2nd back of the body framework 5 that connects backboard 2 are that the amount of movement of coupling part is different, so the 2nd carry on the back between the connecting rod coupling part of the upper end of framework 5 and backboard 2 and produce relative displacement.But this relative displacement is connected device 6 and absorbs.That is, the axial relative displacement of the 2nd back of the body framework 5 can be slided vertically with respect to axial region 13 by cover 14 and be absorbed.In addition, to change can be that the center changes the relative angle of backboard 2 and cover 14 to absorb by the fulcrum 16 that props up device 15 with axle to the angle of the 2nd back of the body framework 5 and the above-below direction of backboard 2.And the 2nd back of the body framework 5 changes and can absorb with respect to axial region 13 rotations by cover 14 with the angle of the horizontal direction of backboard 2.
Like this, the relative displacement that produces between the upper end of the 2nd back of the body framework 5 and the connecting rod coupling part of backboard 2 can absorb by jockey 6, so the 2nd back of the body framework 5 is fascinated, constitutes the mechanism that makes backboard 2 bendings.In addition, the 2nd back of the body framework 5 does not have the effect of irrational power with the coupling part of backboard 2 yet, so can move sleekly, can make backboard 2 bendings with light power, and is easy to use and usability good.And, can prevent that irrational power to the effect of the 2nd back of the body framework 5 with the coupling part of backboard 2, so can prevent the concentrated member that causes of stress, the breakage and the loss of parts, prolonging the life-span of product.In addition, can improve the free degree of combination of materials of framework, the parts of the free degree that the material of each member, parts selects, sliding-contact.
In addition, the backboard 2 of this example that constitutes by the pliability material, cover 14 is rotated with respect to axial region 13, sees from above as shown in figure 41, can easily make backboard 2 bendings so that the central authorities of backboard 2 are outstanding towards the rear.That is, when the person of taking a seat leans against on the backboard 2, can easily make the shape bending of backboard 2 corresponding to the back.Therefore, can further improve the comfortableness of taking one's seat.
In Fig. 1～Fig. 3, Fig. 6, Fig. 7, omitted diagram, the pad material 27 in the cover 28 of folding and unfolding at the bag shape has been installed in the front of backboard 2.Cover 28 as shown in figure 11, last ora terminalis overleaf is provided with the return portion 28a of bag shape, in addition the position relative with the grooving 10 of backboard 2 be provided with towards above the 28b of pocket portion of opening.The shape of the 28b of pocket portion becomes the shape corresponding shape with grooving 10 and tongue piece portion 2c.In return portion 28a, put into the liner plate 29 of elastically deformable, align, prevent that simultaneously wrinkle or bending from appearring in return portion 28a, return portion 28a is torn easily with the shape of the last ora terminalis of cover 28.
In order to be installed on the backboard 2 by the mat 27 that cover 28 covers, the grooving 10 that at first 28b of pocket portion of cover 28 is passed backboard 2 is after cover the tongue piece portion 2c of backboard 2 down, and the last ora terminalis that the return portion 28a above tearing on one side covers backboard 2 gets final product.At this moment, after cover 28 covers and becomes to make the 28b of pocket portion to move the tongue piece portion 2c of backboard 2 to,, installed the return portion 28a on pulling expansion up makes on one side Yi Bian covering the upper end of backboard 2.In addition, because be the last ora terminalis that the return portion 28a of cover 28 is covered backboard 2, make the 28b of pocket portion cover tongue piece portion 2c, so cover 28 can not misplace at left and right directions with respect to backboard 2 yet.
Like this, need only return portion 28a, pass grooving 10 and just pad material 27 can be installed on the backboard 2, make installation exercise very simple from the following covering pocket 28b of portion from top covering cover 28.And, pad material 27 can be installed in all correct position of above-below direction, left and right directions.
That is, in traditional method, when being installed in the cover 28 of folding and unfolding pad material 27 on the backboard 2, be cover 28 to be fixed on the backboard 2 by pin, or fixing with face button (so-called seta is pasted band).In addition, have ora terminalis on the cover 28 be provided with return portion 28a with cover backboard 2 on the example of ora terminalis, but the bottom of this occasion cover 28 also uses pin or face to buckle to be fixed on the backboard 2.Therefore, in traditional method, the cover 28 of folding and unfolding pad material 27 is installed in trouble on the backboard 2, operation is poor.By contrast, installation method according to the cover of this example, do not need to use pin or face to tip the fixing so loaded down with trivial details operation of row in, do not need pin or face are tipped in the row location, also do not needed cover 28 itself is positioned such operation to backboard yet, operation is very good, can reduce manufacturing cost.
In addition, can see the return portion 28a and the 28b of pocket portion of cover 28 behind the chair, so can be different with the color of cover 28 by the color that makes backboard 2, return portion 28a and the 28b of pocket portion become a key element in the design, unexistent in the past design can be made, differentiation can be realized with the chair of other kinds.
In addition, under the state that cover 28 is installed on the backboard 2, also the 28b of pocket portion can be used as the pocket of putting into pocket-handkerchieves such as mobile phone.
Above-mentioned form is an example of preferable form of the present invention, but is not limited thereto, and can carry out various distortion and implement in the scope that does not break away from aim of the present invention.
For example, in the example of Fig. 1～Figure 12, backboard 2 is as can be towards the material or the structure of any direction distortion, and the 2nd back of the body framework 5 formed has flexual works.Specifically, backboard 2 is identical with above-mentioned example, is that resins such as polypropylene, nylon are made.In addition, the 2nd back of the body framework 5, the part that is connected with backboard 2 forms by having flexual resin at least.At this, as the resin that forms the 2nd back of the body framework 5, for well, but the posture of following the person of taking a seat in this way is out of shape backboard 2 well with the structure of strengthening materials such as filling glass fibre or carbon fiber, and have the structure that constitutes the required rigidity of backrest structure, do not do special qualification.In this example, for example use the nylon that has glass.In addition, do not need all parts of the 2nd back of the body framework 5 are made identical rigidity, can change rigidity partly yet.For example, it is littler than the rigidity of bottom also can to compare the rigidity of this arm with the part that is connected by connecting plate 11 of the 2nd back of the body framework 5.Means as changing rigidity for example make the charging quantity of the glass of putting into nylon different with downside at upside, can consider that sometimes the first half is the nylon of band glass fibre, and Lower Half is a metal system, with they combinations.Like this, backboard 2 is made deformable, and the part that is connected with backboard 2 at least for example the 2nd back of the body framework 5 is by having flexual resin when forming, backboard 2 can be followed the person's of taking a seat posture and be moved easily and be out of shape, and can improve the comfortableness of backrest.
For example, when the person of taking a seat rests on one-sided (position of departing from the center line 59 of backboard 2) of backboard 2, above the position that connects by connecting plate 11 of the 2nd back of the body framework 5 in 2 arms of branch, the person's of taking a seat body weight firmly a side's of effect arm bigger deflection takes place, a body weight not side's of effect arm is spurred towards the place ahead because of the distortion of backboard 2.That is, backboard 2 as shown in figure 41, the upper end of backboard 2 is the center torsional deflection with the center line 59 of backboard 2.That is,, can make backboard 2 be deformed into the shape of the posture of following the person of taking a seat significantly because of the 2nd arm of carrying on the back framework 5 reverses the distortion that is difficult for hindering backboard 2.In addition, when the person of taking a seat leans against the center (on the line of center line 59) of backboard 2,2 inwards deflections of arm of the 2nd back of the body framework 5, as shown in figure 42, the central authorities of backboard 2 are crooked significantly with outstanding towards the rear form.That is,, can make backboard 2 be deformed into the shape of the posture of following the person of taking a seat significantly because of the arm flex of the 2nd back of the body framework 5 is difficult for hindering the distortion of backboard 2.And, as shown in figure 43, also can only make the one-sided distortion of backboard 2.That is, only folk prescription deflection significantly in 2 arms of the 2nd back of the body framework 5 can make backboard 2 be deformed into the shape of the posture of following the person of taking a seat significantly.In addition, also can make of the state bending of the upside of backboard 2 with layback.This occasion, jockey 6 not to backboard 2 and the 2nd back of the body between the framework 5 reverse or the mobile of deflection suppresses, this is moved sleekly carries out.
Except the 2nd back of the body framework 5, also the 1st back of the body framework 1 usefulness can be had for example formation such as nylon after the reinforcement such as glass fibre of flexual resin.This occasion is compared by having the occasion that flexual resin forms with the 2nd back of the body framework 5 only, and backboard 2 easy deformation especially as shown in figure 41, are effective during with backboard 2 torsional deflections.
Among the present invention, the part of the connection backboard 2 of at least the 2 back of the body framework 5 forms by having flexual resin, so that do not hinder the distortion of backboard 2.Therefore, can improve the free degree of the distortion of backboard 2, not increase the parts number simultaneously with easy structure.
In addition, at least the part that the top of backboard 2 is supported of backboard 2 and back of the body supporting member 61 is made in the deformable above-mentioned backrest structure, seat board 2 also can be implemented alone under the situation of bending from bending area towards front and back not needing, this occasion, be not to be that metal system the 1st back of the body framework 1 and fortified resin system the 2nd back of the body framework 5 constitute back of the body supporting member 61, but it is integrally formed that the 1st back of the body framework 1 and the 2nd is carried on the back framework 5 by other members.That is,, make easy deflection and get final product as long as the part that is connected with backboard 2 at least and supports backboard 2 of back of the body supporting member 61 for example forms by having flexual resin on top.That is, in the scope that backboard 2 is out of shape well, as long as the top at least of back of the body supporting member 61 forms by having flexual resin.
In addition, the mounting structure of pad material 27 is with the structure-irrelevant of back of the body supporting member 61, so long as grooving 10 is set and is formed with the backboard 2 of tongue piece portion 2c just applicable.
In addition, the above-mentioned pocket 28b of portion is towards the top opening, but also can be with the 28b of pocket portion downwardly facing opening.This occasion as shown in figure 33, is made reverse U shape with grooving 10 with forming tongue piece portion 2c up.
In addition, also can replace the 28b of pocket portion certainly, the device that setting can end with tongue piece portion 2c card, for example filler rod portion (バ Application De portion) etc.When filler rod portion for example is set with the replacement pocket 28b of portion, when being U font or reverse U shape, filler rod portion and tongue piece portion 2c card can both be ended by grooving 10, so that cover 28 is installed on the backboard 2.In addition, as shown in figure 33, deviate from from tongue piece portion 2c, also can stage portion 10a be set at grooving 10 in order to prevent the 28c of filler rod portion.
In addition, in above-mentioned each example, jockey 6 has axial region 13, cover 14, an axle cover 15, but also is not such structure.For example, also but the jockey shown in the image pattern 13 6 is such, and connecting rod lateral bracket 30 is fixed in the 2nd upper end of carrying on the back framework 5, with the axial setting of slotted hole 31 along the 2nd back of the body framework 5, simultaneously backboard lateral bracket 32 is fixed on the backboard 2, the pin 33 that connects in the slotted hole 31 is installed on this backboard lateral bracket 32.Move in slotted hole 31 by pin 33, can absorb the 2nd back of the body framework 5 in axial relative displacement.In addition, in slotted hole 31, rotate, can absorb the 2nd back of the body framework 5 and backboard 2 and change in the angle of above-below direction by pin 33.In the example of Figure 13, slotted hole 31 is set, pin 33 is set, but also can pin 33 be set, slotted hole 31 is set in backboard 2 sides in the 2nd back of the body framework 5 sides in backboard 2 sides in the 2nd back of the body framework 5 sides.
In addition, for example shown in Figure 34～36, jockey 6 also comprises: the axial region 51 with profile of the circle that forms in the upper end at least of the 2nd back of the body framework 5; The back side, the axial region 51 that is arranged on backboard 2 inserts, forms the axle carrier 53 of the insertion mouth 52 that allows these axial region 51 inclinations from the below; Be arranged on a carrier 53 the top, mark off the member 55 in the space 54 that the front end that allows axial region 51 moves.In the example of Figure 36,, form case portion (hereinafter referred to as case portion 55) at the back side of backboard 2 as member 55, with the diapire of case portion 55 as axle carrier 53, with the inner space of case portion 55 as space 54.But, be not limited to case portion 55 certainly as the structure that is used to form a carrier 53 and space 54.
The notion of insertion mouth 52 as shown in figure 37.The opening that inserts mouth 52 forms respectively towards the taper seat of the inboard of axle carrier 53 and the expansion of table side.Therefore, axial regions 51 that insert to insert in mouthfuls 52 can easily be smash the sauce motion with respect to axle carrier 53, and the free degree of the relative motion between backboard 2 and the 2nd back of the body framework 5 is compared with the situation of axial region 13 combinations with the cover 14 of Fig. 5 and is improved.
The 2nd back of the body framework 5 is fascinated when regulating the angle of bend of backboard 2, because the amount of movement of the upper end of the 2nd back of the body framework 5 and the 2nd part of carrying on the back framework 5 that connects backboard 2 are that the amount of movement of connecting rod coupling part is different, so produce relative displacement between the upper end of the 2nd back of the body framework 5 and the connecting rod coupling part of backboard 2, but this relative displacement is connected device 6 and absorbs.That is, the axial relative displacement of the 2nd back of the body framework 5 can be moved vertically with respect to axle carrier 53 by axial region 51 and be absorbed.In addition, the relative angle variation of the 2nd back of the body framework 5 and backboard 2 can be smash sauce with respect to axle carrier 53 by axial region 51 and moved and absorb.And the 2nd back of the body framework 5 changes and can absorb with respect to 53 rotations of axle carrier by axial region 51 with the angle of the horizontal direction of backboard 2.
In the jockey 6 of the above-mentioned type, can omit jockey shown in Figure 56 a required axle device is hinge 15.Therefore, structure is simpler than shown in Figure 5, can reduce the parts number, can reduce manufacturing process simultaneously, improves the free degree of motion, can also reduce manufacturing cost.
But, as shown in figure 38, also the case portion 55 of jockey 6 can be connected with backboard 2 by pin 56, the 55 above-below directions rotation of case portion is installed on the backboard 2 freely.
In addition, gearshift 7 also can make Figure 14 and as shown in Figure 15, by the structure that constitutes of slotted hole 34 with a plurality of recess 34a and the pin 36 that connects this slotted hole 34.The plate 35 that formation is had the slotted hole 34 of a plurality of recess 34a is installed on the 2nd back of the body framework 5 or the connecting plate 12, will sell 36 simultaneously and be installed on the 1st back of the body framework 1, will sell 36 and pass slotted hole 34.In addition, be provided with slotted hole 37 near the lower end of plate 35, axle 4 is connected this slotted hole 37, being arranged to the 2nd back of the body framework 5 can integral body move up and down.
According to this gearshift 7, when changing the turning angle of the 2nd back of the body framework 5, the 2nd back of the body framework 5 is lifted, recess 34a from slotted hole 34 deviates from pin 36, change the turning angle of the 2nd back of the body framework 5, make pin 36, make 5 declines of the 2nd back of the body framework under this state with adjacent or other recess 34a is relative.That is, by change pin 36 the position of chimeric recess 34a, can regulate the angle of bend of backboard 2.Can break away from from recess 34a by the anti-shotpin 36 of weight of the 2nd back of the body framework 5 grades,, can fix the angle of bend that uses dorsulum 2 so can fix the turning angle of the 2nd back of the body framework 5.
Among Figure 14, Figure 15 illustration the situation of the 2 recess 34a of place is set, the number of recess 34a is not limited to 2 places certainly.By increasing the number of recess 34a, the turning angle number of selectable the 2nd back of the body framework 5 is increased, can regulate the angle of bend of backboard 2 multistagely.
In addition, also gearshift 7 can be made cam structure.Figure 16 and Figure 17 are examples of gearshift 7 being made cam structure.In this gearshift 7, utilize pin 46 with lobe plate 38 rotations be installed in freely connecting plate 12 on the flange 12b of backboard 2 side-prominent settings.On lobe plate 38, form slotted hole 38a, by steady pin 39 is connected slotted hole 38a, can be in certain scope with lobe plate 38 rotatable angle limits.By the not shown action bars of rotary manipulation, make lobe plate 38 rotations, the 2nd back of the body framework 5 and the interval of backboard 2 are changed.Operation of cam plate 38, when the interval of the 2nd back of the body framework 5 and backboard 2 is narrowed down, that is, and during with the state of lobe plate 38 from the state of operation of Figure 17 to Figure 16, thereby backboard 2 is desired to return to the original form by the elastic force of self and reduced angle of bend, so lobe plate 38 can not leave from backboard 2.That is, when the power of pushing open of having removed lobe plate 38, then backboard 2 reduces angle of bend with the elastic force of self.But, the rotary manipulation of lobe plate 38 is direct driving cam plate 38 both, also rotatable pin 46.
In the gearshift 7 that utilizes cam structure, be fixed on angle arbitrarily by the anglec of rotation with lobe plate 38, the angle of bend of backboard 2 can be carried out step-less adjustment.In addition,, the turning angle of the 2nd back of the body framework 5 is changed by stages, the angle of bend of backboard 2 can be carried out multistage adjusting by the shape of the cam portion of lobe plate 38 is made polygonal.
In addition, also gearshift 7 can be made Figure 18 and bar linkage structure as shown in Figure 19.In this gearshift 7, the connecting plate 12 that is fixed on the 2nd back of the body framework 5 is connected by 2 connecting rods 40,41 that are being connected flexiblely with backboard 2, and backspring 42 is installed between connecting plate 12 and the backboard 2 with the state of compression simultaneously.Under the state of Figure 19,, the 2nd framework 5 is toppled over towards the rear, increase the angle of bend of backboard 2 while 2 connecting rods 40,41 are stretched by the application of force of backspring 42.In addition, shrink i.e. bending as the application of force that 2 connecting rods 40,41 is overcome backspring 42, then as shown in figure 18, the 2nd back of the body framework 5 erects, and the angle of bend of backboard 2 reduces.By not shown operating means the angle of bend of 2 connecting rods 40,41 is changed, fix its angle, thereby can regulate the angle of bend of backboard 2.Utilize in the gearshift 7 of bar linkage structure, by 2 connecting rods 40,41 being fixed on arbitrarily on the angle of bend, so but the angle of bend of step-less adjustment backboard 2.
In addition, in the above-mentioned explanation, by the upper end of the 2nd framework 5 being toppled over towards the rear to increase the angle of bend of backboard 2, for example, against the time, the person's of taking a seat spine can further be stretched, obtain the extension effects at back better, but also be not such structure.
For example, as Figure 20～shown in Figure 23, the backboard bottom 2b that also can utilize backboard 2 supports the person's of taking a seat buttocks.In this example, the 1st back of the body framework 1 is stretched out towards the top, the backboard top 2a of backboard 2 is fixed on the 1st back of the body framework 1.In addition, the backboard bottom 2b of backboard 2 can be towards front and back to fascinating.The upper end of the 2nd back of the body framework 5 is suspended on the 1st back of the body framework 1, is mounted to and can rotates freely.In addition, the lower end of the 2nd back of the body framework 5 is connected with the backboard bottom 2b of backboard 2.By the operation of gearshift 7, make the 2nd back of the body framework 5 moving towards anteversion and retroversion, the angle of bend of backboard 2 is changed, make backboard bottom 2b carry out front and back and fascinate.For example, the backboard bottom 2b by making backboard 2 square neck forward is moving, and backboard bottom 2b becomes the buttocks that supports the person's of taking a seat buttocks and supports the support sense in the time of obtaining taking one's seat.But, the boundary of the backboard top 2a of backboard 2 and backboard bottom 2b is partly by formation bending area 2e such as resin hinges.
As Figure 24 and shown in Figure 25, also can omit the 2nd back of the body framework 5, between the bottom 2b of the 1st back of the body framework 1 and backboard 2, gearshift 7 is set, the displacement of gearshift 7 directly is passed to backboard bottom 2b.This occasion also can change the angle of bend of backboard 2 by the operation of gearshift 7, and backboard bottom 2b is fascinated before and after buttocks supports.
In addition, as shown in figure 26, also can make the height that to regulate backboard 2.The 1st back of the body framework 1 further is divided into downside framework 1a and upside framework 1b, simultaneously upside framework 1b is inserted the front end be arranged on downside framework 1a, in the cylindrical portion 1c of vertical opening, regulate the height of backboard 2 by upside framework 1b is slided with respect to cylindrical portion 1c.Upside framework 1b and the connection of cylindrical portion 1c are connecting pin 49 to be connected to carry out under the consistent state in the hole 48 that for example makes a plurality of holes 47 of being arranged on the upside framework 1b and cylindrical portion 1c.By upside framework 1b and cylindrical portion 1c card are ended, backboard 2 can be fixed on the height after the adjusting.By regulating the height of backboard 2, can change the height of the sweep of backboard 2.As Figure 27 and shown in Figure 28, the physique that the height of backboard 2 is regulated according to the person of taking a seat can be carried out, thereby can improve the comfortableness of taking one's seat.Figure 27 represents the situation that child takes one's seat, and Figure 28 represents the situation that the adult takes one's seat.
In addition, as Figure 29～shown in Figure 32, the supporting member of auxiliary backrest can be set also except backrest.That is, can be with supporting member 44 towards front and back to the upper end that is installed in backboard 2 rotatably, supporting member 44 is connected by connecting rod 45 with the 1st back of the body framework 1 simultaneously, and the supporting member 44 and the bending of backboard 2 are fascinated linkedly.As supporting member 44, can enumerate headrest 44.In addition, their user mode such as Figure 31 and shown in Figure 32.Headrest 44 lower end is rotatably installed in the upper end of backboard 2, framework 1 is carried on the back by connecting rod 45 and the 1st in the upper end of headrest 44 be connected.Connecting rod 45 is with respect to the 1 rotatable connection freely of headrest the 44 and the 1st back of the body framework.As Figure 29 and shown in Figure 31, under the state that not too makes backboard 2 bendings, headrest 44 moves towards the rear, can not hinder the person of taking a seat.When make backboard 2 bendings from this state, then as Figure 30 and shown in Figure 32, headrest 44 moves towards the place ahead, can support the person's of taking a seat head.
As supporting member 44, be not limited to the headrest that the head to the person of taking a seat supports.For example, as Figure 39 and shown in Figure 40, the also structure that person's of taking a seat shoulder blade part is supported to head.The supporting member 44 of this Figure 39 and Figure 40, while when for example operating personal computer and leaning against on the backboard 2, the posture of the person of taking a seat in order to see monitor, become that the top that makes the back of the body sits up a little.This occasion by supporting member 57, can support the person's of taking a seat the upper part of the body.
In the above-mentioned example, connecting rod 45 is set, supporting member 44 is moved with the bending of backboard 2 with being connected, but also can with the motion of supporting member 44 not with the crooked interlock of backboard 2.Also supporting member 44 can be fixed on the backboard 2, also the operating means of operating supporting member 44 from the bending of backboard 2 independently can be set sometimes, by this operating means to supporting member 44 operation of fascinating.
In addition, also can utilize aforesaid operations bar etc. that gearshifts 7 such as adjustment screw 17, lobe plate 38, connecting rod 40,41 are operated (not shown) such as the maneuverable position of the person of taking a seat setting operation bars.
In addition,, also can adopt the motor of rotations such as making screw 17, lobe plate 38, connecting rod 40,41, utilize switching manipulation to make motor starting, stop, by electric operating gearshift 7 as the drive unit of gearshift 7.
In addition, as gearshift 7, the bag by fluid expansion, contraction can be set also, should be connected with the 2nd back of the body framework 5 and backboard 2 by bag simultaneously,, make bag expansion or contraction by fluids such as air being injected and being attracted in the bag, the 2nd back of the body framework 5 is fascinated, that is, make backboard 2 change angle of bend.
And, also can apply the present invention to seat, the angle of bend of seat board is regulated.That is, but also have a framework, front portion or rear portion and be fixed in the seat board of a framework and rear portion or front portion above-below direction bending, the angle of bend of seat board changed and the holder structure of the chair of the angle of bend governor motion of stationary curved angle.
In addition, but a kind of have the front portion and be fixed in the seat board of a framework and rear portion above-below direction bending, the angle of bend of seat board changed and the holder structure of the chair of the angle of bend governor motion of stationary curved angle, also the bottom of backboard 2 can be fixed in the rear portion of seat board, towards the below bending, then backboard 2 is followed it and is fascinated towards the rear with the rear portion of seat board.
And, in the backrest structure of Fig. 1, the connecting plate 12 of 2 pipes by different component by connections such as welding, carried on the back framework 5 thereby form the 2nd, but also integrally formed.That is, also can the 2nd back of the body framework 5 and connecting plate 12 and carriage 12a is integrally formed with die cast metals such as for example aluminium die casting etc.In addition, be not limited to the integrally formed of die cast metal, also resinous integrally formed or the punching press of metal system integrally formed.
In addition, narrated to make and had flexual deformable backboard 2, the part that is connected with backboard 2 at least of the back of the body supporting member 61 of its supporting is had flexual backrest structure, in the example of Fig. 1～shown in Figure 12, can be implemented, in each example of Figure 13～shown in Figure 45, also can be implemented certainly.That is, when the person of taking a seat against the time, the backrest structure that backboard 2 can be out of shape according to its posture, both only this independent enforcement, again can with backboard 2 bending area 2e towards front and back the backrest structure to bending implement simultaneously.
For example, also can be applicable to not have the chair of angle of bend governor motion 3, i.e. the chair of the structure that directly backboard 2 is supported by back of the body supporting member 61.This occasion, the distortion of backboard 2 is easy, follows the person's of taking a seat motion easily and is out of shape, the backrest comfortableness is good, can with easy structure improve backboard 2 the distortion free degree, need not to increase aspect such as parts number identical with above-mentioned backrest structure.
For example, also can prepare 1 group of use level of having regulated intensives such as glass fibre so that only the part that is connected with the top of backboard 2 bring into play flexual resinous back of the body supporting member 61, with the bigger part of rigidity of each back of the body supporting member 61 bottom fixed bearing to backboard 2, and be connected the top rotation of backboard 2 on the fore-end with flexual back of the body supporting member 61 freely and sliding freely, about back of the body supporting member 61 fascinate according to the person's of taking a seat backrest posture respectively, make the backrest distortion.At this, back of the body supporting member 61 both can about fascinate independently, also can connect integrated by transverse stiffener in installation position side to seat member to undertake 8 to the fixing position of seat subordinate portion.
For example, also can omit gearshift 7, comprise: have the 1st back of the body framework 1 that to install on the present member to undertake 8, the back of the body supporting frame 61 that can be installed in the 2nd back of the body framework 5 on the 1st back of the body framework 1 with fascinating with fascinating; Have backboard bending area 2e, be positioned at the upside of this backboard bending area 2e backboard top 2a, be positioned at the downside of backboard bending area 2e and be fixed in the backboard 2 of backboard bottom 2b of the 1st back of the body framework 1; The jockey 6 that upper end and the backboard top 2a of the 2nd back of the body framework 5 is connected and absorbs their relative displacement.This occasion by making backboard bending area 2e distortion, makes towards front and back backboard top 2a backboard 2 bendings, the top of the backboard at least 2a deformable of backboard 2 to toppling over respect to backboard bottom 2b.At this, form by having flexual resin by the 2nd back of the body framework 5, backboard 2 further is out of shape at the horizontal plane intort.This example such as Figure 44 and shown in Figure 45.When the person of taking a seat leaned against on the backboard 2, the 2nd back of the body framework 5 made the backboard top 2a bending of backboard 2.The 2nd back of the body framework 5 is followed the person's of taking a seat posture deflection simultaneously, so can make the backboard top 2a of backboard 2 follow the person's of taking a seat posture distortion easily.That is, this occasion, the distortion of backboard 2 is also easy, follows the person's of taking a seat trend distortion easily, can improve the comfortableness of taking one's seat, with easy structure improve backboard 2 the distortion free degree, not increase aspect such as parts number identical with above-mentioned backrest structure.

Claims (12)

1. the backrest structure of a chair comprises: have 1 the 1st back of the body framework can installing on the present member to undertake, the back of the body supporting frame that can be installed in 1 the 2nd back of the body framework on the 1st back of the body framework at least at least with fascinating with fascinating; Has the backboard bending area, be positioned at the backboard top of the upside of this backboard bending area, be positioned at the backboard of backboard bottom of the downside of described backboard bending area, also comprise the angle of bend governor motion, it is fixed in described the 1st back of the body framework with in described backboard top and the described backboard bottom either party, the opposing party is by described the 2nd back of the body supporting framework simultaneously, by making described backboard bending area distortion, make described the opposing party with respect to a described side towards front and back to toppling over, described backboard is flexible as a whole, by regulating the turning angle of described the 2nd back of the body framework with respect to described the 1st back of the body framework, but the angle of bend of described backboard is changed and the stationary curved angle.
2. back structure as claimed in claim 1, it is characterized in that, described the 1st back of the body framework is fixed in described backboard bottom, but described backboard top fore-and-aft direction is fascinated, described angle of bend governor motion constitutes, and comprising: lower end and described the 1st back of the body framework are connected and the upper end is that framework the described the 2nd is carried on the back towards front and back to what can fascinate in the center with this tie point; The jockey that upper end and the described backboard top of described the 2nd back of the body framework is connected and absorbs their relative displacement; Be arranged on the position of leaving the described tie point between described the 1st back of the body framework and described the 2nd back of the body framework and make described the 1st back of the body framework and the described the 2nd carry on the back the gearshift that the distance between the framework changes.
3. the backrest structure of a chair is characterized in that, comprising: deformable backboard; At least at least 1 back of the body supporting member forming by the pliability resin of the part that is connected with described backboard.
4. back structure as claimed in claim 3 is characterized in that, has the jockey that the upper end of described back of the body supporting member and the top of described backboard is connected and absorbs their relative displacement.
5. the backrest structure of a chair is characterized in that, comprising: have at least 1 the 1st back of the body framework can installing on the present member to undertake, the back of the body supporting frame that can be installed at least 1 the 2nd back of the body framework on the 1st back of the body framework with fascinating with fascinating; Have the backboard bending area, be positioned at the upside of this backboard bending area backboard top, be positioned at the downside of described backboard bending area and be fixed in the backboard of backboard bottom of described the 1st back of the body framework 1; And the jockey that upper end and the described backboard top of described the 2nd back of the body framework is connected and absorbs their relative displacement, by making described backboard bending area distortion, make described backboard top with respect to described backboard bottom towards front and back to toppling over, described backboard is flexible as a whole, at least the described backboard upper deformable of described backboard, simultaneously described the 2nd back of the body framework is formed by flexual resin.
6. the backrest structure of a chair is characterized in that, comprising: have at least 1 the 1st back of the body framework can installing on the present member to undertake, the back of the body supporting frame that can be installed at least 1 the 2nd back of the body framework on the 1st back of the body framework with fascinating with fascinating; And has a backboard bending area, be positioned at the backboard top of the upside of this backboard bending area, be positioned at the downside of described backboard bending area and be fixed in the described the 1st and carry on the back the backboard of the backboard bottom of framework 1, also comprise the angle of bend governor motion, it is by making described backboard bending area distortion, make described backboard top with respect to described backboard bottom towards front and back to toppling over, described backboard is flexible as a whole, by regulating the turning angle of described the 2nd back of the body framework with respect to described the 1st back of the body framework, but the angle of bend of described backboard is changed and the stationary curved angle, simultaneously, described angle of bend governor motion comprises: the lower end is connected with described the 1st back of the body framework, and the upper end with this tie point be the center towards front and back to can fascinate described the 2nd the back of the body framework; The jockey that upper end and the described backboard top of described the 2nd back of the body framework is connected and absorbs their relative displacement; Be arranged on the position of leaving the described tie point between described the 1st back of the body framework and described the 2nd back of the body framework and make described the 1st back of the body framework and the described the 2nd carry on the back the gearshift that the distance between the framework changes, at least the described backboard upper deformable of described backboard, simultaneously described the 2nd back of the body framework is formed by flexual resin.
7. as claim 2 or the described back structure of claim 6, it is characterized in that described gearshift comprises: be arranged on the adjustment screw on either party in described the 1st back of the body framework and described the 2nd back of the body framework; Be arranged on the opposing party, have a female threaded member of the screw that inserts described adjustment screw; But the angle changeable device that the angle above-below direction that makes at least one side in described adjustment screw and the described female threaded member changes.
8. as each described back structure in the claim 2,4,5,6, it is characterized in that described jockey comprises: axial region with profile of the circle that forms in the upper end at least of described the 2nd back of the body framework; With respect to the rotation of described axial region freely and at the connecting portion that endwisely slips freely; And described connecting portion freely is installed in axle device described backboard on towards upper and lower to rotation with respect to described backboard, described connecting portion has not can be from the come off length of degree of described axial region.
9. as each described back structure in the claim 2,4,5,6, it is characterized in that described jockey comprises: axial region with profile of the circle that forms in the upper end at least of described the 2nd back of the body framework; The back side and the described axial region that is arranged on described backboard inserts, forms the axle carrier of the insertion mouth that allows this axial region inclination from the below; And be arranged on described axle carrier the top, mark off the member in the space that the front end that allows described axial region moves.
10. as each described back structure in the claim 1,2,5,6, it is characterized in that,, make described backboard top or Ke Chao front and back, described backboard bottom to fascinating by forming 1 grooving at least at described backboard bending area.
11. as each described back structure in the claim 1,2,5,6, it is characterized in that, the supporting member of auxiliary backrest is rotatably installed in the upper end of described backboard, and described supporting member is connected by connecting rod with described the 1st back of the body framework, and the bending of described supporting member and described backboard is rotated linkedly.
12., it is characterized in that described resin is the nylon that has glass as each described back structure in the claim 3 to 6.
CNB2003801011427A 2002-10-11 2003-10-08 Structure of chair backrest Expired - Fee Related CN100420404C (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2002299716A JP2004129966A (en) 2002-10-11 2002-10-11 Backrest structure of chair
JP299716/2002 2002-10-11
JP299697/2002 2002-10-11
JP2002299697A JP4185754B2 (en) 2002-04-08 2002-10-11 Chair backrest structure

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CN1713841A true CN1713841A (en) 2005-12-28
CN100420404C CN100420404C (en) 2008-09-24

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CN (1) CN100420404C (en)
AU (1) AU2003272952A1 (en)
WO (1) WO2004037047A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101801241A (en) * 2007-03-13 2010-08-11 Hni技术公司 Dynamic chair back lumbar support system
CN101953592A (en) * 2010-04-16 2011-01-26 天津开发区奥金高新技术有限公司 Automatically adjustable back cushion
CN103799740A (en) * 2012-11-06 2014-05-21 国誉家具株式会社 Chair
US8752896B2 (en) 2009-10-26 2014-06-17 Itoki Corporation Rocking chair
CN110833279A (en) * 2018-08-17 2020-02-25 大河精工有限公司 Chair with tension chair back

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5524564B2 (en) * 2009-10-19 2014-06-18 株式会社岡村製作所 Chair back
DE102012109710A1 (en) 2012-10-11 2014-06-12 Grammer Ag Vehicle seat with changeable backrest shape
CN106108442A (en) * 2016-08-22 2016-11-16 南宁曦聚绰新能源有限公司 A kind of Multi-purpose chair

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Publication number Priority date Publication date Assignee Title
JP2507575Y2 (en) * 1991-01-31 1996-08-14 株式会社イトーキクレビオ Chair backrest device
JP2536735Y2 (en) * 1991-04-05 1997-05-28 デュポン アジアパシフィック リミテッド Chair with backrest
DE4233627A1 (en) * 1992-10-06 1994-04-07 Comforto Gmbh Chair with backrest
JP3884186B2 (en) * 1998-07-09 2007-02-21 株式会社岡村製作所 Chair
CN1330907A (en) * 2000-06-09 2002-01-16 普罗科德有限公司 Chair with synchronous swing seat and back

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101801241A (en) * 2007-03-13 2010-08-11 Hni技术公司 Dynamic chair back lumbar support system
CN101801241B (en) * 2007-03-13 2013-06-05 Hni技术公司 Dynamic chair back lumbar support system
US8752896B2 (en) 2009-10-26 2014-06-17 Itoki Corporation Rocking chair
CN102595972B (en) * 2009-10-26 2015-12-02 株式会社伊藤喜 Rocking chair
CN101953592A (en) * 2010-04-16 2011-01-26 天津开发区奥金高新技术有限公司 Automatically adjustable back cushion
CN101953592B (en) * 2010-04-16 2012-09-05 天津开发区奥金高新技术有限公司 Automatically adjustable back cushion
CN103799740A (en) * 2012-11-06 2014-05-21 国誉家具株式会社 Chair
CN103799740B (en) * 2012-11-06 2017-10-27 国誉株式会社 Chair
CN110833279A (en) * 2018-08-17 2020-02-25 大河精工有限公司 Chair with tension chair back

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AU2003272952A1 (en) 2004-05-13
WO2004037047A1 (en) 2004-05-06

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