CN2680110Y

CN2680110Y - Device for adjusting back length and gradient of chair

Info

Publication number: CN2680110Y
Application number: CN 03208084
Authority: CN
Inventors: 萧诒伦
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-09-27
Filing date: 2003-09-27
Publication date: 2005-02-23
Anticipated expiration: 2013-09-27

Abstract

The utility model discloses a device for adjusting back length and gradient of chair. The upper and the lower ends of at least one link arm are provided with adjusting and positioning device respectively linking between the seat cushion and the back. The adjusting and positioning device at the upper end comprises a fixing seat with flange positioned at the side surface, and the lateral surface of the flange is provided with ratchet part. The surface corresponding to the link arm is also provided with ratchet part meshing with the surface. The outer side of the link arm is penetrated with screws sleeved with elastic members to be combined to the fixing seat, so that the two ratchet parts are elasticly meshed. The adjusting and positioning device at the other lower end comprises a fixing seat with the flange at the outer side, and the circle surface of the flange is provided with a ratchet part. The ratchet part meshes with the pawl part pivoted in the groove of the corresponding link arm. The clamping and separation of the pawl part and the ratchet part of the adjusting and positioning device at the lower part can make the swinging of the link arm, so that the front and back depth location of the back can be adjusted. Simultaneously, the jumping teeth action in the ratchet part of the adjusting and positioning device at the upper part can realize any rotation of the back, so that the desired gradient can be adjusted.

Description

Can adjust the device of chair back depth and gradient

Technical field

The utility model relates to adjust the device of chair back depth and gradient, the upper and lower end axle pivot that at least one link arm is provided is between the seat cushion and the chair back, and the engagement that this pivot place is ratchet structure location, and then make the chair back except the adjustment of depth before and after can doing, and can adjust the gradient that is fit to human body back dependence.

Background technology

The chair back of general chair tool is for the occupant can be lain to layback; usually can make chair back lower end axle pivot on the seat cushion or on the skeleton of chair tool; simultaneously also can be provided with elastic mechanism in axle pivot place; allow the chair back can along with the occupant when layback is lain weight and tilt naturally; make the occupant obtain comfortable facing upward by effect; but the chair back all is a rear end of being located at seat cushion usually; but (especially when when working or comparatively petite stature) under the different situations; may not can maybe whole seat cushion can't be occupied; and make its buttocks or waist not be posted by on the chair back; only be 2/3rds or 1/2nd (even may still less) that occupy seat cushion; so the occupant just can't allow its leaning on back on the chair back; but in order to keep good sitting posture; then must straighten oneself and ridge; get off for a long time, the occupant must feel and can't ache all over lastingly under without any the situation that can lean on.

The structural design that can adjust depth before and after the chair back is in fact also arranged, but also only limit to adjust the depth position, front and back of the chair back, can't adjust the gradient of the chair back more at all, and the back that can't offer the occupant meets the comfortable dependence of ergonomics.

The utility model content

The purpose of this utility model provides a kind of device of adjusting chair back depth and gradient, and this device can allow the occupant, is keeping under the good correct sitting posture, and the back also can rest on the chair back.

Desire is improved the existing chair back can't have disappearances such as adjustment depth, gradient and operation are difficult for concurrently, and this novel technical scheme is:

The two ends of establishing a link arm at least respectively are hubbed on the seat cushion and the chair back, and the axle pivot place of link arm and seat cushion or the chair back is provided with the adjustment positioner, make the chair back can be under the swing of link arm and can before and after adjust the adjustment of its depth position, and the chair back can be done the rotation location at the link arm upper end again, enable to obtain suitable gradient, so make the occupant can be, and freely adjust chair back depth position and gradient according to the rider positions of actual institute palpus.

The adjustment positioner at the axle pivot place of above-mentioned link arm two ends and the seat cushion or the chair back, the all discs that can be the set flange in the outside of a holder are provided with ratchet part, and with the set groove of corresponding link arm in the ratchet portion engagement that is pivoted, by the blocking of ratchet portion and ratchet part or from taking off, and make link arm and chair back rotation arbitrarily, rotation and location, allow the chair back can adjust depth position and gradient.

Again, the adjustment positioner at the axle pivot place of above-mentioned link arm two ends and the seat cushion or the chair back, the flange outer sides face that the side was convexly equipped with that can be a holder is provided with ratchet part, and the face corresponding with link arm also is provided with the ratchet part that can be engaged with, between link arm and the seat cushion or the chair back, be provided with flexible member again again, wear then with screw in conjunction with two, enable to make link arm and chair back rotation arbitrarily, rotation and urgent location, allow the chair back can adjust depth position and gradient by the jumping tooth of ratchet part.

In addition, aforementioned two kinds of heteroid positioners can be located at the two ends of link arm respectively and locate, and make the chair back also can reach the adjustment of depth position and gradient.

Secondly, positioner between the link arm and the chair back, also can be designed to the automatically reset structure of tool elasticity, even the link arm upper end is arranged with the scalloped recess that two ends respectively are equiped with flexible member, then convexing with the fan-shaped convex body that holds to go in the groove with chair back axle pivot corresponding position, and make the two-side elastic element withstand the convex body both sides and allow the chair back remain on a specific angle, so after the chair back is adjusted to different depths position, as long as occupant person back is close to the chair back, just can make the chair back rotate freely to the gradient of palpus.

A kind of device of adjusting chair back depth and gradient is to comprise the upper and lower side of establishing a link arm at least, respectively is provided with upper and lower adjustment positioner and is linked between the seat cushion and the chair back, wherein:

A rise device of adjusting, be to comprise that one can be fixed on the holder outboard end on the chair back, be convexly equipped with a lateral surface and be provided with the flange of ratchet part, and the medial surface of the relative link arm of flange upper end, be provided with the groove that can hold flange, and also be provided with ratchet part, wear the screw that a cover has elastic component by the link arm outside then at bottom land, combine with holder, flexible member is to the pushing tow of link arm and two relative ratchet parts can flexiblely be meshed;

Reduce a device of adjusting, be to comprise that one can fix holder outboard end on cushion, be provided with the local flange that ratchet part is set in all discs top, with the medial surface of corresponding link arm lower end, be provided with the groove that can be installed with flange, and axle is established a ratchet portion in groove, the tooth portion of one end of ratchet portion can mesh with ratchet part, another termination one of ratchet portion is hubbed at the control lever on the link arm, flange outer sides face below is provided with a plurality of location shrinkage pool, at the bottom of the link arm groove with shrinkage pool corresponding position, aforementioned location, then establish a slotted eye that is installed with flexible member and positioning bead in regular turn, positioning bead can be embedded in the shrinkage pool of arbitrary location.

The described device of adjusting chair back depth and gradient, wherein the adjust lateral surface at ratchet part place of a device of downward modulation is established and is an inclined-plane, locate in bottom surface, corresponding groove place, be concaved with the depression and the shrinkage pool that can be installed with clamping block and flexible member, the place is provided with one and is corresponding inclined-plane with the inclined-plane of ratchet part in the middle of the clamping block, and be positioned at the inclined-plane above locate to establish a clamping edge, make and between inclined-plane and clamping edge, form an end face, can lean on the back side of ratchet portion, and force clamping block to submerge in the depression, allow and maintain a certain distance between ratchet part two inclined-planes corresponding with clamping block, and when the compressing of the controlled bar of ratchet portion is rotated and after detaching ratchet part, clamping block emersion depression and the tooth portion of ratchet portion is equipped on the clamping edge, two inclined-planes that ratchet part is corresponding with clamping block then can be close together.

The described device of adjusting chair back depth and gradient, the upper and lower adjustment positioner that wherein links the link arm two ends of the chair back and seat cushion can exchange setting.

The described device of adjusting chair back depth and gradient, the two ends that wherein link the link arm of the chair back and seat cushion can be provided with an identical rise device of adjusting.

The described device of adjusting chair back depth and gradient, the two ends that wherein link the link arm of the chair back and seat cushion can be provided with an identical downward modulation device of adjusting.

The described device of adjusting chair back depth and gradient, wherein descend the control lever of the compressing ratchet portion rear end of adjusting device to replace by a jacking block, promptly on the link arm that is positioned at above the ratchet portion rear end, offer a tank that can be installed with button, one end of button protrudes out outside the link arm, the other end is then established to be and can be installed with aforesaid jacking block ㄇ shape section, the two side walls of ㄇ shape section is set as helical teeth portion, make and the floating helical teeth portion engagement of establishing in jacking block two sides, but remain with certain space length between the tooth top of the helical teeth portion of two corresponding engagements and tooth paddy, and then make jacking block be convexly equipped with a pushing part corresponding to the rear end of ratchet portion, lean above the rear end of ratchet portion, and establish a flexible member again and can be passed by elasticity backward jacking block.

The described device of adjusting chair back depth and gradient, wherein going up adjusting device can make the holder outboard end that is installed on the chair back be convexly equipped with a fan-shaped convex body, and can be located in the set scalloped recess of medial surface on the link arm, between inner two ends of scalloped recess and convex body, respectively be installed with and have elastic component.

The described device of adjusting chair back depth and gradient, wherein going up adjusting device can make the outboard end that is installed in the holder on the chair back convex with arc leading portion and fan-shaped convex body, and can be located in the groove that establish in the medial surface place on the link arm, and the counterparty in groove is to being provided with arc guide barrel and fan-shaped block body, make on convex body and block body and be provided with interpolation slit, and between holder and link arm, establish a flexible member, allow the foot at two ends of flexible member insert respectively in the interpolation slit of convex body and block body.

Basis is novel can be understood and get fully by following embodiment and conjunction with figs., and implements according to this.

Description of drawings

Fig. 1 is this novel three-dimensional appearance schematic diagram;

Fig. 2 is the adjust decomposing schematic representation of a device of this novel downward modulation;

Fig. 3 is the adjust decomposing schematic representation of a device of this novel rise;

Fig. 4 is the adjust cutaway view of a device of this novel downward modulation;

Fig. 5 is the adjust cutaway view of a device of this novel rise;

Fig. 6 is the state of this novel chair back when not adjusting the depth position;

Fig. 7 is the state that this novel chair back is adjusted depth position and gradient;

Fig. 8 is the adjust state of a device of the downward modulation before this novel chair back is desired to reset;

Fig. 9 is the adjust state of a device of the downward modulation of this novel chair back when desiring to reset;

Figure 10 be this novel adjustment positioner different situation is set;

Figure 11 is the adjust embodiment two of a device of this novel rise;

Figure 12 is the adjust action schematic diagram of a device embodiment two of this novel rise;

Figure 13 is the adjust embodiment three of a device of this novel rise;

Figure 14 is the adjust action schematic diagram of a device embodiment three of this novel rise;

Figure 15 is the adjust embodiment two of a device of this novel downward modulation;

Figure 16 is that this novel downward modulation is adjusted before a device side analyses and observe action;

Figure 17 is that this novel downward modulation is adjusted after a device side analyses and observe action;

Figure 18 is the adjust front cross sectional view of a device of this novel downward modulation.

The specific embodiment

Please consult shown in Figure 1ly, the utility model is that the both sides between the seat cushion 1 and the chair back 2 respectively are provided with link arm 3 and are linked to therebetween, and in the two ends of link arm 3 and the axle pivot junction of the seat cushion 1 and the chair back, respectively is provided with upper and lower adjustment positioner 5,4, wherein:

The rise device 5 of adjusting, see also shown in Fig. 3 and 5, be to establish a holder 51 to be fixed on the chair back 2, and establish a flange 511 at the outboard end of holder 51, and the lateral surface at flange 511 is provided with ratchet part 512, make flange 511 can stretch in the set groove 37 in link arm 3 upper ends, and be provided with in groove 37 bottom surfaces can with the ratchet part 371 of ratchet part 512 engagements, the lateral surface place of link arm 3 establishes one more in addition and holds groove 372 then, make and to pack into for a flexible member 52, multiple pass link arm 3 backs and be fixed on the holder 51 with a screw 53, so elasticity compressing by 52 pairs of link arms 3 of flexible member, make two ratchet parts 512,371 produce flexible engagement, and then make two ratchet parts 512, elasticity can take place between 371 jump the effect of tooth, the chair back 2 can be rotated arbitrarily adjust its gradient and location, allow its head when living link arm 3 simultaneously when screw 53 is screwed, can stop elasticity jumping tooth and prevent the rotation of the chair back 2.

Reduce the device 4 of adjusting, see also shown in Fig. 2,4,5 and 6, it is the bottom surface that to be fixed in seat cushion 1 of establishing a holder 41, and be convexly equipped with a flange 411 at the outboard end of holder 41, and make that the part is provided with ratchet part 412 on all discs of flange 411, and the lateral surface that makes ratchet part 412 places establishes and is an inclined-plane 413, and then is provided with a plurality of location shrinkage pool 414 in the place, below of flange 411 lateral surfaces; Multiple medial surface place in said flange 411 pairing link arms 3 lower ends, be arranged with a groove 31 that can be installed with flange 411, and make groove 31 bottom surfaces with shrinkage pool 414 corresponding positions, aforementioned location, if one is installed with in regular turn and has elastic component 462 and the slotted eye 333 of positioning bead 461, and positioning bead 461 can be embedded in arbitrary location shrinkage pool 414; In addition, in the groove 31 of flange 411 set ratchet parts 412 tops, consolidate a ratchet portion 42 with a pivot pin 451 pivots more again, and make ratchet portion 42 1 ends be provided with tooth portion 421 and ratchet part 412 engagements, then middle the establishing of the other end is concavity 424, make concavity 424 places be positioned at 34 places, stop section that groove 31 sidewalls are convexly equipped with, and be provided with a flexible member 423 at the end face place that is positioned at tooth portion 421, and make flexible member 423 be located in the set appearance cave 35, groove 31 tops, the elasticity that makes ratchet portion 42 1 ends be subjected to flexible member 423 is oppressed, even tooth portion 421 Elastic Meshing are gone on the ratchet part 412; In addition, in the place of the engagement place that is positioned at ratchet part 412 and ratchet portion 42 corresponding to groove 31 bottom surfaces, be concaved with the depression 331 and the shrinkage pool 332 that can be installed with clamping block 43 and flexible member 433, and wherein clamping block 43 in the middle of the place be provided with one and be corresponding inclined-plane 432 with the inclined-plane 413 at ratchet part 412 places, and be positioned at inclined-plane 432 above locate then to establish a clamping edge 431, make and between inclined-plane 432 and clamping edge 431, form an end face 434, and be positioned at inclined-plane 432 below locate then to establish a lower face, so clamping block 43 moves down in the outside pushing of flexible member 433, end face 434 is leaned on the back side of the tooth portion 421 of ratchet portion 42, and maintain a certain distance between corresponding two inclined-planes 413,432 of ratchet part 412 and clamping block 43; On the link arm 3 above concavity 424 ends of ratchet portion 42, again with the solid control lever 47 of pivot pin 452 pivots, make the roof pressure portion 471 at an end end of control lever 47, it is the top, rear end that relies on ratchet portion 42, the other end of control lever 47 then is to stretch out in outside the link arm 3, can pull control for the occupant, establish one again in the lateral surface of the link arm 3 of ratchet portion 42 at last and cover 30 and cover.

Please cooperate Fig. 6 again, shown in 7, when the occupant does not occupy on seat cushion 1, promptly can hand inwardly be passed by the chair back 2, make adjust ratchet portion 42 in the device 4 of the downward modulation of link arm 3 lower ends, meeting elasticity escape is on ratchet part 412, (the depth position, front and back that is the chair back 2) located and located at the back that makes the chair back 2 can adjust close occupant person, cooperate two ratchet parts 512 that raise in the device 5 of adjusting simultaneously, 371 Elastic Meshing effect, and the gradient of 2 palpuses of the adjustment chair back, and the chair back 2 be adjusted to must gradient after, screw 53 can be screwed and make between two ratchet parts 512,371 fully closely chimeric, the chair back 2 can't be rotated, so the chair back 2 can be posted by fully on occupant's the back, order must be endured the work of sitting for a long time, makes its waist and back can obtain a comfortable dependence.

Otherwise, as Fig. 8, shown in 9, if desire to make the chair back 2 to reset or backward during reclining, then control lever 47 can be pulled downwards, the other end that makes control lever 47 presses down the concavity end of ratchet portion 42, make the tooth portion 421 of the other end of ratchet portion 42 detach ratchet part 412, and cross the clamping edge 431 of clamping block 43, make clamping block 43 under the pushing tow of flexible member 433 to outer displacement, make tooth portion 421 be stuck on the clamping edge 431 and detach ratchet part 412 fully, and the inclined-plane 432 of clamping block 43 and the inclined-plane 413 of ratchet part 412 are close together, so allow outwards rotation of link arm 3, even the chair back 2 can be pushed rearward and move, and after the chair back 2 is pushed to the limit, under the gradually high compressing in the inclined-plane 413 of ratchet part 412, make clamping block 43 meetings along with in the depression 331 that submerges gradually, and then allow clamping edge 431 detach the tooth portion 421 of ratchet portion 42 at last, make ratchet portion 42 under the pushing tow of flexible member 423, and make its tooth portion 421 snap in once again on the ratchet part 412, the chair back 2 can be moved inward once again and adjust depth position before and after it.

In addition, as shown in figure 10, link arm 3 upper and lower sides can be provided with the structure that a device 5 is adjusted in identical rise, or reduce the device 4 of adjusting, or upper and lower adjustment positioner 5,4 can exchange use.

Next, a device 51 is adjusted in rise also can be as Figure 11.Shown in 12, be that holder 51 outboard ends that order is installed on the chair back 2 are convexly equipped with a fan-shaped convex body 54, link arm 3 upper end medial surfaces then correspondence one scalloped recess 32 is set, and respectively be installed with at the two ends, inside of scalloped recess 32 and have elastic component 6, after making in convex body 54 is packed scalloped recess 32 into, two-side elastic element 6 just in time presses closer in the two ends of convex body 54, and allow convex body 54 remain on the centre of scalloped recess 32, and then make the chair back 2 remain on a specific angle, so after the chair back 2 is adjusted to different depth positions, when as long as occupant's back leans against on the chair back 2, mat just can make the chair back 2 rotate to the gradient that abuts in the back automatically under the strength compressing of leaning on back; Or as Figure 13, shown in 14, the outboard end of holder 51 convexes with arc and leads portion 56 and fan-shaped convex body 55, and in the groove 382 at the medial surface place of link arm 3 upper ends, also correspondence is provided with arc guide barrel 380 and fan-shaped block body 381, and on convex body 55 and block body 381, be provided with interpolation slit 57,383, after making portion of leading 56 and convex body 55 be installed with in groove 382 and the guide groove 380, therebetween establish a flexible member 7, and the foot that makes the two ends of flexible member 7 inserts the interpolation slit 57 of convex body 55 and block body 381 respectively, in 383, it is so same after the chair back 2 is adjusted to different depth positions, need only strength, just can make the chair back 2 rotate to the gradient that abuts in the back automatically by occupant's leaning on back.

In addition, reduce the structure at the original control lever place of the device 4 of adjusting, also can be as Figure 15, structure shown in 16 and 18 replaces, promptly offer a tank 39 on the link arm of locating above the ratchet portion 42 3 being positioned at, and make tank 39 inwalls be provided with terrace edge 391, pack in the tank 39 and establish a button 8 again, and make the terrace edge 81 that establishes in places in the middle of the button 8 can block at tank 39 terrace edges 391 places, and then an end that makes button 8 is ㄇ shape section, and make two side walls be set as helical teeth portion 82, multiple establishing again in the ㄇ shape section that a jacking block 9 can be located in button, and the floating helical teeth portion 91 that is engagement with helical teeth portion 82 that is provided with in the both sides that make jacking block 9, but the helical teeth portion 82 of two corresponding engagements, between 91 tooth top and tooth paddy, maintain certain space length, and then be convexly equipped with a pushing part 92 corresponding to ratchet portion 42 rear end in jacking block 9, it is leaned above the concavity end of ratchet portion 42, on covering 30 medial surfaces, be provided with a stopper 301 again, make between stopper 301 and jacking block 9 and be provided with flexible member 93, make jacking block 9 be covered 30 meetings simultaneously jacking block 9 is leaned by elasticity passing backward; So shown in Figure 16,67 and 18, when being pressed downward, button 8 compels and when moving inward, because of the position of the hypotenuse of its helical teeth portion 82 changes, can force jacking block 9 to move and go 42 rotations of pushing tow ratchet portion inwardly, and then make the tooth portion 421 of ratchet portion 42 detach ratchet part 412, make the chair back 2 can do the adjustment of depth position, front and back equally.

Claims

1. the device that can adjust chair back depth and gradient is characterized in that, is to comprise the upper and lower side of establishing a link arm at least, respectively is provided with upper and lower adjustment positioner and is linked between the seat cushion and the chair back, wherein:

2. the device of adjusting chair back depth and gradient as claimed in claim 1, it is characterized in that, the adjust lateral surface at ratchet part place of a device of described downward modulation is established and is an inclined-plane, locate in bottom surface, corresponding groove place, be concaved with the depression and the shrinkage pool that can be installed with clamping block and flexible member, the place is provided with one and is corresponding inclined-plane with the inclined-plane of ratchet part in the middle of the clamping block, and be positioned at the inclined-plane above locate to establish a clamping edge, make and between inclined-plane and clamping edge, form an end face, can lean on the back side of ratchet portion, and force clamping block to submerge in the depression, allow and maintain a certain distance between ratchet part two inclined-planes corresponding with clamping block, and when the compressing of the controlled bar of ratchet portion is rotated and after detaching ratchet part, clamping block emersion depression and the tooth portion of ratchet portion is equipped on the clamping edge, two inclined-planes that ratchet part is corresponding with clamping block then can be close together.

3. the device of adjusting chair back depth and gradient as claimed in claim 1 is characterized in that, the upper and lower adjustment positioner at the link arm two ends of the described binding chair back and seat cushion can exchange setting.

4. the device of adjusting chair back depth and gradient as claimed in claim 1 is characterized in that, the two ends of the link arm of the described binding chair back and seat cushion can be provided with an identical rise device of adjusting.

5. the device of adjusting chair back depth and gradient as claimed in claim 1 is characterized in that, the two ends of the link arm of the described binding chair back and seat cushion can be provided with an identical downward modulation device of adjusting.

6. the device of adjusting chair back depth and gradient as claimed in claim 1, it is characterized in that, the described control lever of the compressing ratchet portion rear end of adjusting device down can be replaced by a jacking block, promptly on the link arm that is positioned at above the ratchet portion rear end, offer a tank that can be installed with button, one end of button protrudes out outside the link arm, the other end is then established to be and can be installed with aforesaid jacking block ㄇ shape section, the two side walls of ㄇ shape section is set as helical teeth portion, make and the floating helical teeth portion engagement of establishing in jacking block two sides, but remain with certain space length between the tooth top of the helical teeth portion of two corresponding engagements and tooth paddy, and then make jacking block be convexly equipped with a pushing part corresponding to the rear end of ratchet portion, lean above the rear end of ratchet portion, and establish a flexible member again and can be passed by elasticity backward jacking block.

7. the device of adjusting chair back depth and gradient as claimed in claim 1, it is characterized in that, the described adjusting device of going up can make the holder outboard end that is installed on the chair back be convexly equipped with a fan-shaped convex body, and can be located in the set scalloped recess of medial surface on the link arm, between inner two ends of scalloped recess and convex body, respectively be installed with and have elastic component.

8. the device of adjusting chair back depth and gradient as claimed in claim 1, it is characterized in that, described upward adjusting device can make the outboard end that is installed in the holder on the chair back convex with arc and lead portion and fan-shaped convex body, and can be located in the groove that establish in the medial surface place on the link arm, and the counterparty in groove is to being provided with arc guide barrel and fan-shaped block body, make on convex body and block body and be provided with interpolation slit, and between holder and link arm, establish a flexible member, allow the foot at two ends of flexible member insert respectively in the interpolation slit of convex body and block body.