CN102933119A - Lumbar support of chair - Google Patents

Abstract

A lumbar support of a chair is provided to alleviate strain of the human body and to prevent accumulation of fatigue. CONSTITUTION: A lumbar support of a chair comprises: a seat plate(1); a structure(2) supporting the seat plate; an elastic member in which one side thereof is fixed on the front of a guide rail and the other side thereof is fixed to a moving unit moving along the guide rail. The lower part of the structure is expanded to the lower part of a seat plate and is combined with the moving unit(6). The moving unit is combined with the guide rail and moves to the front and rear of the seat plate.

Description

Chair

Technical field

The present invention relates to a kind of chair, when being sitting in the worker that works on this chair forward or receding health, the seat of chair is moved forward and backward, can effectively support user's health whereby.

Background technology

Be sitting in for a long time the worker who carries out work on the chair, its health particularly back etc. is can accumulation a lot of tired, and people propose various effective solutions for this reason.Mainly contain and backrest is designed to be fit to the shape of body shape or makes backrest have the method etc. of suitable elastic force, the various schemes that namely have the optimization for the optimization of elastic force and shape to propose.But in described scheme, when turn forward health or when moving buttocks to the place ahead of seat, because separating between backrest and user's the back, so do not have any effect of chair user.The someone proposes along the scheme of fore-and-aft direction moving backrest body for this reason, but the movement of backrest and backrest is fixing very inconvenient.Fixedly backrest generally only is arranged on a side in the backrest left and right sides with fixture, so when back rest supports back, also the situation that backrest reverses to a side can occur.

For addressing the above problem, fixedly backrest device can be set respectively in the both sides of movable backrest, but the operation of described scheme is very inconvenient, it does not almost have practicality, and does not have actual example application yet.

There is the people to propose as described fixing means, offers phase a plurality of holes across a certain distance in the appropriate location of chair body, in the part position of removable backrest steady pin is set, and the scheme that the two chimeric mode is fixed.Another scheme proposes, the scheme that the frictional force by the cam that rotates centered by fixed axis is fixed.

When moving backrest, utilize user's strength moving backrest, so when backrest is larger, can become user's larger burden always.

For changing the Support Position of backrests according to user's the different bodily forms, the optimization scheme of proposition is moving backrest along the vertical direction, regulates whereby the scheme of backrest height.But for the height adjusting method of this backrest, the user must just can carry out the adjusting of backrest height by egress of chair.And, as user forward or when receding health, because the Support Position changes, so effective body support.

When the user turned forward health for work etc., the chair that wheel is installed can be to the workbench side shifting, so that user's back can effectively obtain the support of backrest, perhaps inserted back cushion between backrest and back, made backrest can effectively support back.But, sometimes come off because of the back cushion that adds or because the thickness of back cushion changes, and can't successfully manage the spacing between backrest and the user's back.

The user turns forward the seat of health or chair when moving forward, and can't solve described problem fully although the chair of wheel is installed, and also can solve some problems, and translational speed is also rapider.

As mentioned above, the movable chair of existing various backrests can't provide than the better convenience of the chair that wheel is installed, and does not also have the commercially actual example of realizing.

The user is in order to have a rest, when under being sitting in the state of chair back being relied on chair fully, to wish that the angle of backrest recedes a little.For this reason, existing various chair all can be given certain elastic force.But, because described elastic force provides the continuous action that is back to original position power, so the user has to resist described elastic force with certain strength.Simultaneously, different from backrest, because the seat of chair can be kept level, so user's health can be pushed to the place ahead.

When the user turned forward health near workbench, shank also can be made the action that turns forward, and the reason of making described action may be: in the middle of different operating, described posture may be comparatively comfortable posture.At this moment, seat also can keep level, so can't tackle user's posture.

Also there is technical scheme to propose, at the seat downside setting device at adjustable seat panel angle of inclination a little, but no matter be for rest purpose or work purpose, its angle of inclination all abundant not or elastic force does not meet user's requirement, so can't give the too large help of user, can't be widely used.

Summary of the invention

The user is turn forward health or when moving forward buttocks by seat, the effective ways that support user's back are, according to user's posture moving backrest of work.In the middle of actual life, the inconvenience of eliminating the user is to realize business-like prerequisite.

At the fixing means of the movable backrest of first to file in the following ways: the chair fixed position is offered porose, and the pin that will be arranged on the part position of movable backrest inserts the device that is fixed in this hole.The fixed position of described scheme arranges mutually across a certain distance, and inserts or can produce impact when breaking away from pin.Described method larger is fixingly used larger active force with frictional force for obtaining, so the loss of frictional contact surface is larger.Preferably backrest is fixed on required any position.Be used for fixing braking method, should be simple and reliable, guarantee durability, too large loss can not be arranged.

With brake apparatus to the left and right sides wherein a side is braked the time, for preventing the secund phenomenon of backrest, should brake simultaneously the left and right sides.But the brake apparatus of braking simultaneously the left and right sides can cause baroque problem.Therefore need to provide a kind of chair that does not hinder the work of interpolation equipment.

In described structure, need to utilize user's strength during moving backrest, but the size of backrest can become user's very large burden when very large, so the kinetic characteristic according to human body need to be provided, is exercisable device with less strength.Namely, the user forward or when receding back, all sites of backrest reply user's health provides suitable support.

Preferably, provide a kind of chair, when the user on being sitting in this chair turns forward health for work, even without easy disengaging or have certain thickness back cushion, also can successfully manage the distance between backrest and the user's back.

Preferably, provide a kind of chair, this chair can be regulated backrest height according to user's the bodily form, and the user not egress of chair also can regulate easily.

Preferably, provide a kind of chair, when being sitting in user on this chair near the workbench health that turns forward, when turning forward simultaneously shank, the certain angle that seat can be turned forward is tackled user's posture whereby.

Preferably, provide a kind of chair, the user on being sitting in this chair can according to different inclination torsion, provide different elastic forces forward or when turning forward health.

For being sitting in the user who has a rest on the chair, the backrest certain angle that recedes preferably, and should possess not can be because of elastic restoring force to the take inclination angle fixed mechanism of other pressure of user, simultaneously for sliding on the buttocks that prevents the user, and the certain angle that seat should be receded.At this moment, should possess the mechanism that sufficient fixing usefulness active force can be provided for opposing inclination torsion.

For addressing the above problem, the invention provides the device that a kind of fixedly backrest moves:

By the effect of " according to the operation of operating grip-handle, being fixed the brake(-holder) block on the body ", obtain braking effect.For the active force with brake(-holder) block and braking parts provides suitable frictional force to fixed body, form certain matsurface at body surface, and then available less active force, the useful effect power that backrest is fixed on the optional position can be provided.

Form braking effect and can act on to the braking parts of the left and right sides of chair, form the link gear of the braking maneuver of the linkage left and right sides, therefore available once-through operation can make the braking parts of the left and right sides start simultaneously easily.Composition is according to the mechanism of user's bodily form adjustable backrest height.For making things convenient for moving backrest, can provide the flexible member of elastic pulling force in the front end setting of movable part.The backrest that arranges can support user's waist and its top when the user relies on backrest with health.

In described structure, for the movement of the linkage element that do not hinder interlock left and right sides brake(-holder) block, at downside lid has been installed, enough spaces are provided whereby.Can make about brake(-holder) block or move up and down and be fixed the position according to the operation of brake handle, so the fixedly movement of backrest.When the user turned forward health in order to work, backrest can be rotated according to the distance between backrest and the user's back.The present invention be provided with the user not egress of chair also can regulate easily the backrest height governor motion of backrest height.The user is backward or when turning forward chair, and the elastic forces corresponding to the different sizes of the active force of different sizes can be provided.Described elastic force is provided by Compress Spring system and elongation spring system, and has respectively the elastic force governor motion.

When the user receded for relying on backrest, seat also can tilt, and therefore can prevent the slip of user's buttocks, and the present invention has the arrestment mechanism that all can provide effective bed knife arbitrarily angled.

Invention effect of the present invention is:

Because backrest can move, backrest can rest on the appropriate location, and can effectively be supported for forward health or move the user's of buttocks back to seat the place ahead of work.Be fixing described backrest, brake by " being fixed brake(-holder) block on the body according to the operation of operating grip-handle ".For the active force with brake(-holder) block and braking parts provides suitable frictional force to fixed body, form suitable matsurface at fixed body, and then available less active force, backrest can be fixed on the optional position.Compare with the direct friction mode of the frictional force of simple use cam, the present invention can significantly reduce the wearing and tearing of contact-making surface, can effectively guarantee its durability; With the mode that obtains bed knife in the pin insertion hole is compared, the present invention can and be fixed easily at required optional position noiselessness.

The braking effect effect is to the left and right sides of chair, so compare with the situation when a side is braked only, the present invention can prevent that backrest from turning round to the phenomenon of a side because of active force.Cause has the linkage element of linkage left and right sides braking parts, thus only can start easily the braking parts of the left and right sides with once-through operation, and then the inconvenience of left and right sides braking parts can not occur to operate respectively.

In described structure, for the movement of the linkage element that do not hinder interlock left and right sides brake(-holder) block, lid has been installed the bottom, therefore can provide enough spaces.And then also it can be used as the acnemia chair.When the downside of bottom cover arranges shank, can realize the function of conventional chair.Perhaps, can the chair shank that be comprised of a back shaft be installed in bottom cover, also can form height-adjustable structure and the Chair structure that wheel is installed.Because utilize user's strength moving backrest always, so can become user's larger burden when the backrest size is larger.Be the kinetic characteristic according to human body, with less strength also removable backrest, can provide the forward flexible member of elastic force in the setting of backrest movable part, so can eliminate the trouble that spurs forward backrest, when promoting backrest backward, can provide the back of larger active force to promote because using, so also there is not too large difficulty.

For the position that backrest should support, when the user moves forward, preferably support waist location, when the user retreats fully backward, preferably support user's whole back and head, but use a backrest can't realize simultaneously described hope.For this reason, arrange at backrest rear movably the thoracic vertebrae position that can support the user and head and with the backrest independently of backrest movably, therefore, when user's back retreats fully backward, can support user's whole back and head, move forward or when mobile and user makes resting guard backward, all can provide suitable support at backrest.

When the user turns forward health for work, in order not break away from easily or to have a certain thickness back cushion, also can successfully manage the distance between backrest and the user's back, by the movement of backrest or the rotation on backrest top, make backrest more effectively support the user according to user's posture.

For the support zone of tackling the chair user along with user's the bodily form and user's action and change, the backboard height adjusting system is set.The user is sitting on the chair can operate described height adjusting system, so can greatly improve its convenience.

When being sitting in the user who has a rest on the chair and relying on backrest to recede health, for the buttocks that prevents the user slides at seat, simultaneously seat is also receded.Because seat has the function that can tilt, thus when the user turns forward health and shank near workbench, the seat predetermined angular that also can turn forward according to user's posture, thereby can greatly improve user's convenience.

As mentioned above, when forward or when receding seat, the elastic acting force that turns forward when receding is different.The present invention is provided with can be according to different actions, and the flexible member of different elastic force is provided, thus can apply active force according to the inclination of human body, and then can give user's comfort.Described flexible member is arranged on the rear of chair, so the user can freely stretch forward shank.

The elastic force that will be back to original position when tilting because of seat in order to eliminate is to the take elastic restoring force of backrest of additonal pressure of user, being arranged on the angle of inclination can provide the arrestment mechanism of abundant bed knife, so can be easily fixing backrest, and the user can obtain not to be subjected to the comfort of elastic restoring force.

Description of drawings

Fig. 1 represents to contain the embodiment of all structures.

Fig. 2 be about compress the schematic diagram that brake(-holder) block contains the moving backrest system of auxiliary guide rail.

Fig. 3 be about compress the exploded view that brake(-holder) block contains the moving backrest system of auxiliary guide rail.

Fig. 4 compresses the moving backrest system of brake(-holder) block and the schematic diagram of backboard height adjusting system about containing.

Fig. 5 compresses the moving backrest system of brake(-holder) block and the rear schematic diagram of backboard height adjusting system about containing.

Fig. 6 compresses the moving backrest system of brake(-holder) block and the rear exploded view of backboard height adjusting system about containing.

Fig. 7 contains the moving backrest system of upper-lower compacting brake(-holder) block and the place ahead schematic diagram of backboard height adjusting system.

Fig. 8 contains the moving backrest system of upper-lower compacting brake(-holder) block and the rear exploded view of backboard height adjusting system.

Fig. 9 is the schematic diagram that contains the inclination angle adjusting device.

Figure 10 is the detailed maps of inclination angle shown in Figure 9 adjusting device.

Figure 11 is the chair exploded view that contains the chair inclination angle adjusting device that is located on the Chair structure body.

Figure 12 is arranged on the Compress Spring combination on the chair and extends the detailed maps (poised state) of spring assembly.

Figure 13 is the exploded view of Compress Spring combination and elongation spring assembly.

State diagram (compression work state) when Figure 14 is Compress Spring work.

State diagram (elongation duty) when Figure 15 is profound spring work.

Figure 16 is the fixedly exploded view of arrestment mechanism of seat inclination.

The specific embodiment

Comprise the embodiment of all structures of the present invention as shown in Figure 1.

The present invention is described in detail with reference to the accompanying drawings.

Fig. 2 to Fig. 8 represents to be equiped with the movably seat section of backrest.

Fig. 1 to Figure 10 represents, can move along fore-and-aft direction for making backrest, seat or chair body be installed with guide rail (10) and with described guide rail (10) in conjunction with and mobile movable part (6).Backrest comprises: be combined the guide rail (10) of the direction of motion that guides movable part with the backboard (1) of user's Body contact, the structure (2) that supports backboard, the movable part (6) of being combined with described structure, with movable part.The Lower Half of the upper structure (2) of composition backboard and the connecting rod (3) of the first half by passing the two of substructure body (5), formation can be along the joint portion of fore-and-aft direction rotation.Connecting rod (3) connects joint, the left and right sides, can be linked in joint, the left and right sides.

In the inside through hole of the binding site of the upper structure (2) by connecting rod (3) combination and substructure body (5), the inside of the wherein one of upper structure (2) and substructure body (5) is provided with screw thread, and described screw thread combines with the screw thread that is formed on connecting rod (3) two ends.Left and right sides screw thread is preferentially selected the opposite thread of hand of spiral.The two ends of connecting rod (3) are provided with retainer (4), and described retainer (4) can also use as handle.At the rotation retainer when (4), about two joint portions can be mobile round about along the connecting rod direction, so the joint portion of upper structure (2) and substructure body (5) can be pushed mutually.

Contact-making surface in the joint portion of upper structure (2) and substructure body (5) arranges jog, and when retainer (4) rotation and two structures when mutually pushing, this jog can effectively be resisted the revolving force that produces because of user's weight.The end of connecting rod (3) becomes handle by retainer (4), described connecting rod becomes the connecting pin that connects upper structure (2) and substructure body (5), and can be used as the STATEMENT OF FEDERALLY SPONSORED of two retainers about interlock, therefore convenient in the left and right sides any side all can regulate.The rotating range of described retainer (4) is in 180 degree, and this moment, the effect of screw thread equated with cam.Therefore, the screw thread category here comprises the effect of cam.

The substructure body (5) of backrest is installed in along in the through hole that forms along the vertical direction on the mobile movable part (6) of guide rail (10), therefore can regulate height along the vertical direction, one side of movable part (6) is provided with, it is fixing with retainer (16) to be used for preventing that the backrest structure body from moving up and down, and fixingly the backrest structure body can be adjusted to suitable position with retainer (16) by described.Described fixing can be screw thread combination or the mode of utilizing cam frictional force with retainer (16).

Described guide rail (10) is fixed on the seat (15) of chair, but when chair is the integrally formed chair of seat and lower body, also guide rail can be fixed on the body of seat (15) or chair.Prevent that mobile the fixing of movable part (6) is arranged on the movable part (6) with braking parts.Fig. 2 and Fig. 3 be arrange in expression auxiliary guide rail (11) about extruding with the composition diagram of the movable backrest system of brake(-holder) block (7).

Auxiliary guide rail (11) is arranged on chair seat or guide rail (10) body.The front end of movable part (6) cooperates with brake(-holder) block (7), and auxiliary guide rail (11) is by between the auxiliary guide rail (11), and when handle (8) was used in the operation braking, brake(-holder) block (7) extruding auxiliary guide rail (11) was braked whereby.With the contact-making surface between the handle (8) jog is set at auxiliary guide rail (11) and braking, can improves whereby brake force and anti-skidding (not shown).Braking can use the force transmission of handle (8) to opposite side braking with the connecting rod (9) of handle (8) by linkage left and right sides brake force.

Connecting rod (9) and brake(-holder) block (7) be by threaded engagement, when the hand of spiral of the left and right sides screw thread that cooperates with brake(-holder) block (7) is opposite, and more balanced active force about can providing, and then can effectively resist the torsion that reverses to the left and right from the outside.Present embodiment arranges auxiliary guide rail (11) separately, and with its as and the braking framework that cooperates of brake(-holder) block (7), can make whereby with the brake(-holder) block that cooperates of auxiliary guide rail (11) and have certain flexibility, it can absorb the slight distortion that causes because of braking, make the brake force between each brake(-holder) block (7) more even, improve stopping effect.

Extruding was with the composition diagram of brake(-holder) block about the brakes that Fig. 4 to Fig. 6 is illustrated in removable backrest had.At Fig. 4 to Fig. 6, brake(-holder) block (7) but move left and right be installed in the front end of movable part (6), the upper end of brake(-holder) block (7) is guided by guide rail (10) and moves forward and backward with movable part (6).Connecting rod (9) passes brake(-holder) block (7) and cooperates with brake(-holder) block, and connecting rod (9) and brake(-holder) block (7) pass through threaded engagement.During with engage thread assembling right side screw thread and left side screw thread, relative brake(-holder) block (7) can be close to each other and be in contact with one another in the fixed position or mutually away from.Described fixed position refers to the relatively movably immovable part of fixed part, is fixed on any part on the seat or any part of the chair body that is fixed such as seat or guide rail etc.Namely, the end of connecting rod (9) is fixed on braking with on the handle (8), when braking is rotated with handle (8), cooperation opposite direction because of screw thread, left and right sides brake(-holder) block (7) can be mobile round about, the fixed part branch contact of brake(-holder) block (7) is on guide rail (10), and then the movement of braking movable part (6).At this moment, should jog or matsurface be set at the contact-making surface of brake(-holder) block (7) and guide rail (10), thus when the user when relying on backrest, can obtain sufficient support force.

Braking when working, only needs the anglec of rotation less than semicircle with handle (8), and the effect of the working portion of screw thread is identical with the effect of cam at this moment.Namely only form the thread less than 180 degree, also can work, and then can think that the cooperation of screw thread is identical with the effect of cam.Only use the screw thread identical with described mode, get final product so that wherein two brake(-holder) blocks (7) play braking action.

At Fig. 4 to Fig. 6, use the brake(-holder) block (7) that is formed by 4 brake(-holder) blocks for obtaining stable braking effect, two brake(-holder) blocks also can serve the same role but remove wherein.Even only use a brake(-holder) block (7) also can play braking effect, but in order to obtain stable braking effect, preferred at least two the above brake(-holder) blocks (7) that use.

In described Fig. 4, Fig. 6, Fig. 7 and Fig. 8, brake(-holder) block (7) can be combined in the front end of the protuberance side of movable part (6) up or down, and brake(-holder) block (7) leaves a determining deviation and moves along fore-and-aft direction with movable part (6) between guide rail (10).Connecting rod (9) is installed on the movable part of the left and right sides.The contact site of brake(-holder) block (7) and connecting rod (9) is by cam (17) contact that is arranged on connecting rod (9).

The end face of connecting rod (9) is fixed on braking with on the handle (8), the described braking rotating energy of handle (8), be passed on the cam (17) that is formed on connecting rod (9) left and right sides, brake(-holder) block (7) moves up by the effect of cam (17), and its fixed position tightly is crimped on the guide rail (10), and then can brake the movement of movable part (6).

Contact-making surface at brake(-holder) block (7) and guide rail (10) should arrange jog or matsurface, so that when the user relies on backrest, can obtain sufficient support force.

At Fig. 7, Fig. 8, connecting rod (9) plays the effect of the connecting pin that is connected with brake(-holder) block (7) and drives the effect of brake(-holder) block, and the brake(-holder) block (7) that also plays interlock left and right sides braking parts makes the effect of the two interlock.Whereby, backrest can obtain the stable support force of the left and right sides, can effectively resist the torsion from the outside, braking parts in the left and right sides any side all can brake, only the operation with a side can obtain described braking effect.

To mode shown in Figure 11 lid (14) is installed such as Fig. 2 in the seat bottom, can be obtained whereby can not hinder the space that moves forward and backward of braking parts left and right sides connecting rod (9).As Fig. 2 of bottom surface shank ((chair lower structure body) 92) of not representing chair to situation shown in Figure 8, namely in the situation of acnemia chair, described lid (14) can directly contact with ground.

Because the downside of bottom cover (14) is provided with chair shank ((chair lower structure body) 92), so can obtain the function identical with conventional chair.Perhaps, can the chair shank that be comprised of the leg structure with a back shaft be installed in bottom cover, also can form height-adjustable structure or the structure of wheel is installed.

For making things convenient for the movement of backrest, in particular for the convenient operability that spurs forward the user of backrest, the elastomeric elements such as spring (12) are installed on the fixed part (13) in the front side that is fixed on movable part (6) and seat the place ahead, by the elastic force of described elastomeric element, make backrest obtain the thrust that moves forward.When the user turned forward or moves, braking was with handle (8) brake off state, by the elastic force of the elastomeric elements such as spring (12), backrest is moved forward with the user or advances, and made itself and user's health close contact.When backrest was in the appropriate location, braking entered on-position with handle (8), and the backrest that therefore is braked can effectively support user's back.

On the contrary, when the user recedes or moves, braking handle (8) brake off state, backrest enters the state that can move freely, this moment, the user can promote backrest backward with health, when backrest moved to the desired position, braking entered on-position locking backrest with handle (8).In described process, the user uses the strength of health, can realize easily promoting backward the step of backrest.

When the user moved forward, the preferred site that backrest should support should be user's lumbar vertebrae position.When the user retreats fully backward, preferably support user's whole back and head, but only can't realize described a plurality of hope with a backrest.For solving described problem, at first reduce the movably height of backrest, afterwards at the rear of backrest movably, append setting and can support user's thoracic vertebrae position and the backrest (Fig. 1) of head region, therefore when the user pushed back to rear fully, backrest can support user's whole back and head, namely, when backrest moves forward and rearward retreat, all can provide the support that can allow the user be in comfortable state.

Fig. 4 to Fig. 9 represents to be arranged on the backboard height adjusting system on the backboard (1).

Such as Fig. 6, shown in Figure 8, be fixed on the fixed part (101) on the backboard (1), can move up and down with structure (2).

The part of the structure of backboard height adjusting system (104), be fixed on the backboard (1) by fixed part (101), the extension of structure (104) is prolonged horizontal direction and is extended, the position, intermediate portion has tabular fixing with projection (106) along what protrude perpendicular to the direction of axle, the middle part of brake strip (105) is provided with, the perforation face of tabular projection is positioned at the horizontal component of structure (104) upward, so the horizontal component of structure (104) can guide brake strip (105).

Fixing with being provided with the spring (107) with elastic pulling force between the tabular lug boss in the middle of projection (106) and the brake strip (105), elastic pulling force by described spring, two ends, brake strip (105) outside and the jog engagement (please refer to Fig. 4 to Fig. 9) that is arranged on the backrest structure body (2), and then fixing backboard (1).

When regulating the height of backboard (1), by the handle of giving prominence to the below of brake strip (105), the two ends, the outside of brake off friction plate and be arranged on engagement between the jog on the backrest structure body, the state that backboard (1) can be moved up and down along backrest structure body (2).Namely, when holding the handle of brake strip (105) and promotion downwards, can regulate the height of backboard (1), after it arrives desired height, behind the handle of take-off the brake friction plate (105), the end of brake strip is by the elastic force and the jog engagement (please refer to Fig. 4 to Fig. 9) that is arranged on the backrest structure body (2) of spring (107), and then backboard (1) is fixed.

More downward more outstanding than the bottom of backboard (1) because of the handle of described brake strip (105), so the user of chair stretches out one's hand backward, can regulate the backboard height under the state of egress of chair not.

Fig. 9 to Figure 16 represents to be located at the inclination angle adjusting device on the chair.

The seat of chair with the horizontal structure element (91) of chair lower structure body as trunnion axis, one side of seat rotatably is set on the described axle, and opposite side is fixed on and is installed in the seat bottom surface or be used for covers seat support component (90) on the lid (14) of seat bottom surface.Namely, the upper end of seat support component (90) is fixed on the seat bottom surface or is used for covering the lid (14) of seat bottom surface, and the lower end is installed on the horizontal structure element (91), and then the seat of chair can be rotated along fore-and-aft direction.

For correspondence because of the inclination that chair rotation produces, buffer unit and original position return mechanism should be set, such as Fig. 9, Figure 10, shown in Figure 11, turning forward and sweptback spring assembly (53,73) of reply chair is set at the rear of chair.Spring assembly is arranged on the rear of chair, reserves the anterior position of chair, can guarantee chair user's can be the freely movable space of shank.

The below is respectively according to following state: chair is not subject to from the external force of user's etc. caused inclination and is in the state of the poised state of level, the Compress Spring work that recedes, the state of the extension spring work that turns forward, and described structure and various duty are carried out following explanation.

[poised state (Fig. 9 to Figure 12) of Compress Spring]: in compression spring set, but the two ends of compressed spring be fixed on support spring and have the upper end of wider area (71) and bottom plate (74) on, suppress the elastic-restoring force of spring with the elongate repression of swelling connector (72) that prevents spring elongation.The upper end of repression of swelling connector (72) is installed on the upper end (71), and the rotary supporting part (58) of the base side of spring system is passed and by as preventing that the nut (75) of release unit from keeping certain-length in the lower end.The chair seat does not have forward or recedes when being in level, and the elastic force of spring is in the poised state that any elastic force is not provided to seat.

[duty of Compress Spring (Figure 14)]: when the rotating chair seat receded it, compression spring set entered duty, and resisted in the following manner the inclination of chair seat.

The compression stress that rotation produces during seat is passed to the upper end (71) of compression spring set by being arranged on Compress Spring guide portion (70) on the seat, and then spring is accepted the compression stress that passes over.When compression, the bottom of repression of swelling connector (72) can freely be stretched out downwards by rotary supporting part (58), and then only understands Compress Spring, makes it have elastic-restoring force.

At this moment, the upper end of elongation groups of springs is fixed on the chair seat, and the lower end has following structure, and namely the bottom (54) of elongation spring can freely by being opened in the through hole on the rotary supporting part (58), therefore can not exert an influence to compression when compression.

[pressure regulating method of Compress Spring]: spring pressure adjusting portion (76) is combined with rotary supporting part (58) and screw thread, when rotating handles (77) moved up or down it, the spring pressure adjusting portion made progress or downward active force regulating spring pressure by bottom plate (74).

[poised state (Fig. 9 to Figure 12) of elongation spring]: in the elongation groups of springs, elongating the spring of installing is fixed on upper end (51) and bottom (54), because having certain distance between the head that is fixed on spring bottom (54) on the gravitation adjusting portion (56) and gravitation adjusting portion (56) by screw thread, so can suppress the upper end and the bottom is mutually close.Not having forward or the state of the seat that recedes, can be in the poised state that any elastic force is not provided to seat.

[duty (Figure 15) of elongation spring]: when the rotation seat turned forward it, the elongation groups of springs was started working, and the inclination of opposing seat.The extending force that produces because of the rotation of seat, by being installed in elongation spring section (50) and the rotating axle pin (52) on the seat, effect is to the upper end of extending groups of springs (51), gravitation adjusting portion (56) is because larger and can't be moved up by gravitation adjusting portion (56) and the suppressing portion that moves up (55) that is threaded than being opened in opening on the rotary supporting part (58), the lower end of spring is fixed on by gravitation adjusting portion (56) with by the bottom that is threaded (54) and upward can't moves, a segment distance is extended upward from the head of gravitation adjusting portion (56) in the upper end (51) that is connected to spring upper end, so have the elastic-restoring force that returns to original position.

At this, because of the semicircle protuberance of the upper end (71) of compression spring set be installed between the Compress Spring guide portion (70) on the seat certain distance is arranged, so can not exert an influence to the elongation of spring.

[the gravitation control method of elongation spring]: when regulating the gravitation of elongation spring, the suppressing portion that at first will move up (55) fully moves to lower position, prevent afterwards the rotation that is fixed on the bottom (54) on the gravitation adjusting portion (56) by screw thread, rotating afterwards gravitation regulating handle (57) moves up it, adjust whereby tensile force (tension), make after regulating the suppressing portion that moves up (55) again close contact on rotary supporting part (58).

Because the chair seat rotates, so the rotary supporting part of spring assembly (58) is rotatably installed on the rotation joint portion (59) of Chair structure body (92), and can keep stable angle corresponding to the elastic-restoring force of elongation spring and Compress Spring.

When utilizing user's huckle that the seat of chair is turned forward and when utilizing user's back and seat that body weight makes chair to recede, according to the difference of torque magnitude, adopts different Compress Springs and extend the spring force of spring.For example, can produce less torsion when turning forward seat, so should adopt the less spring (present embodiment uses the elongation spring) of elastic force that tilts for opposing this moment, should adopt the larger spring (present embodiment employing Compress Spring) of elastic force for the opposing inclination this moment can produce larger torsion when receding seat, so.Namely, elongation spring and Compress Spring as flexible member have different elastic-restoring forces according to different situations.

Figure 16 represents for the fixing operate portions of the brake apparatus at seat inclination angle.

The fixing brake apparatus at seat inclination angle: cam (85) is installed on the support (bracket) (86) that is located at braking parts housing (84) by rotating shaft (87).The guide portion (81,120) of brake(-holder) block (81,120) is embedded in the through hole of braking parts housing (84), and brake(-holder) block (81,120) is worked by the motion of cam.

To shown in Figure 11, be fixed with circular braking parts framework (83) such as Fig. 9 on the structure (92).With the rotation of seat to required angle, operation brake handle (82).The operation cam (85) of brake handle by being installed in the brake handle end, make brake(-holder) block (81,120) mutually near and compress braking parts framework (83), and then seat can be fixed on required angle.

Because braking parts framework (83) is designed to circle, thus can tackle wider angle of inclination, and it is designed to have the circle of relatively large radius, so the larger torsion that produces in the time of can tackling the seat rotation.Jog or matsurface can be set at the contact-making surface of braking parts framework and brake(-holder) block, but Effective Raise bed knife whereby.

For chair related to the present invention, such as the scope that request scope according to the present invention, detailed description and accompanying drawing thereof represent, can carry out various changes and enforceable various embodiment, all belong to protection scope of the present invention.

Industry applications

Be sitting in the people that chair carries out work, study, research and operation in fronts such as desk, workbench, because of ceaselessly turn forward health or rely on the action of backrest of action meeting.At this moment, if the chair that uses can't effectively support chair user's posture, the passing in elapsed time can accumulate user's fatigue, reduces its operating efficiency, and can cause bad sitting posture.

Chair of the present invention can successfully manage user's various body gestures, and is fit to user's uses such as described.Chair of the present invention can be eliminated user's sensual fatigue, improve user's concentration degree, increase work efficiency, can prevent the various diseases that causes because of bad sitting posture, and prevent the recurrence of the various diseases that causes because of bad sitting posture by correct sitting posture.

Claims (19)

1. chair, have on the seat of described chair or the framework of chair relative to seat and cooperate the movable part that moves along fore-and-aft direction along the fixing guide rail of fore-and-aft direction and with described guide rail, and have the backrest that can move along the fore-and-aft direction of chair, it is characterized in that:

Have the braking parts and the brake apparatus that prevent that described movable part from moving, by the operation of braking with handle brake(-holder) block is pressed on the movement that the chair fixed part also prevents described movable part whereby.

2. chair according to claim 1 is characterized in that: described brake apparatus have by about the braking of a side make the connecting rod of brake apparatus interlock and work with the operation of handle.

3. chair according to claim 1 is characterized in that: have the upper structure (2) that supports backrest and at the substructure body (5) of the downward open end in the left and right sides, described substructure body (5) cooperates with the up and down through hole of described movable part, and adjusts the height of backrest moving up and down.

4. chair according to claim 1 is characterized in that: have the elastomeric element (12) of elongation, the front of the movable part (6) of this elastomeric element connection backrest and the two ends of fixed part (13).

5. chair according to claim 1 is characterized in that: also have the rear that is arranged on movable backrest, be independent of movable backrest and irremovable backrest.

6. according to claim 1 to 5 described chairs, it is characterized in that: have seat bottom cover (14).

7. according to claim 1 to 5 described chairs, it is characterized in that: have the braking accepted with the brake(-holder) block (7) of handle effect, compress auxiliary guide rail (11) by connecting rod (9), and then the fixedly movement of backrest.

8. according to claim 1 to 5 described chairs, it is characterized in that: have the braking accepted with the brake(-holder) block (7) of handle effect, the connecting rod (9) of the side-to-side movement by the interlock brake(-holder) block is fixed part, and then the fixedly movement of backrest.

9. according to claim 1 to 5 described chairs, it is characterized in that: have the brake(-holder) block (7) of accepting to brake with the handle effect, move and be located at the cam (17) of connecting rod (9) by interlock left and right sides brake(-holder) block (7), be fixed along the vertical direction the brake(-holder) block (7) of part, and then the fixedly movement of backrest.

10. according to claim 1 to 5 described chairs, it is characterized in that: the upper structure of described backrest (2) and substructure body (5) are rotatably installed on the connecting rod (3), by the angle that is used for regulating backrest of retainer (4).

11. according to claim 1 to 5 described chairs, it is characterized in that: the height adjusting system with backboard (1) height of regulating along the vertical direction backrest, the handle outstanding to the below of brake strip (105) is more downward more outstanding than the bottom of backboard, thereby the user also can catch the described handle line operate of going forward side by side being sitting under the state of chair.

12. chair according to claim 11 is characterized in that: the part of the structure of described backboard height adjusting system (104) is fixed on the backboard (1), a part of level of the extension of structure forms, and the middle part has be fixed fixing with projection (106), the brake strip (105) of installing along the structure of protuberance both sides and and brake strip (105) be fixed together fixing with between the projection (106) spring (107) being installed, the jog kneading on described projection and the backrest structure body (2) that is located at brake strip (105) outside.

13. to 5 described chairs, it is characterized in that according to claim 1: it has the inclination angle adjusting device; Described inclination angle adjusting device possesses: an end is fixed on chair seat bottom, the horizontal structure element (91) that the other end forms on the top of Chair structure body and along left and right directions, the seat support component (90) of rotatably installing, forwards or rear rotation seat when it is tilted provide the flexible member (53,73) of the elastic force of different sizes according to different inclinations.

14. chair according to claim 13 is characterized in that: described flexible member has Compress Spring; The fixedly upper end (71) of Compress Spring upper end and the fixedly bottom plate of Compress Spring lower end (74), the spring pressure adjusting portion (76) that supports bottom plate (74) and cooperate with rotary supporting part (58); Connect upper end (71) and bottom plate (74), pass smoothly rotary supporting part (58), the bottom is by the elongate repression of swelling connector (72) that prevents that release unit (75) from forming; Be fixed on upper on the seat and the Compress Spring guide portion (70) that cooperates with the upside protuberance of end (71); Be rotatably installed in the rotary supporting part (58) on the rotation joint portion (59) that is located on the Chair structure body.

15. chair according to claim 14 is characterized in that: described spring pressure adjusting portion supports bottom plate (74), the spring pressure adjusting portion makes the spring pressure adjusting portion (76) of installing by rotary supporting part (58) and screw thread advance or retreat, and then the elastic force of regulating spring.

16. chair according to claim 13 is characterized in that: described flexible member has the elongation spring; The bottom (54) of the upper end (51) of fixing elongation spring upper end and fixing elongation spring lower end; Keep the gravitation adjusting portion (56) of the elasticity distance between upper end (51) and bottom (54); Be rotatably installed in the seat fixing not (50) that the elongation spring on the seat was gone up and be fixed in upper end (51) by rotating axle pin (52); Be rotatably installed in be located at the Chair structure body rotation joint portion (59) on rotary supporting part (58); Be installed on the gravitation adjusting portion (56) by screw thread, and be located at the suppressing portion that moves up (55) of rotary supporting part (58) downside.

17. chair according to claim 16 is characterized in that, described elongation spring is regulated pressure in the following manner: fixedly upper end (51), and make the bottom (54) of screw thread and gravitation adjusting portion (56) combination can be freely by being opened in the opening of rotary supporting part (58), and then make the larger suppressing portion that moves up of ratio open (55) and the gravitation adjusting portion (56) of being combined with screw thread moves forward and backward the elastic force of regulating spring.

18. according to claim 1 to 5 described chairs, it is characterized in that: the seat support component (90) with rotatably combination, the one end is fixed on the chair seat bottom, and the other end is horizontally set on structure element (91) on the Chair structure body along left and right directions; And be arranged on circular braking parts framework (83) on the Chair structure body with seat rotating shaft coaxle mode; The described seat support component (90) that is located on the chair seat applies effect for described braking parts framework (83), whereby the fixing arrestment mechanism of seat rotation.

19. chair according to claim 18 is characterized in that described arrestment mechanism comprises: be installed with braking parts housing (84) on the seat of standing part or the lid and be assemblied in brake(-holder) block (81) on the braking parts housing; Effect by described brake handle is pressed on cam (85) on the braking parts framework (83) with described brake(-holder) block (81).

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