CN1925771A - Chair - Google Patents

Abstract

A chair, comprising a leg column (1), a seat (3), and a back support (4). An intermediate support body (9) is fitted to the top end of the leg column (1), the seat (3) and a back frame (5) are fitted to the intermediate support body (9), and the back support (4) is fitted to the top end of the back frame (5) through a joint device (11). The seat (3) is formed in a rectangular shape in plan view, and horizontally swingably mounted on the intermediate support body (9). The back support (4) can be freely rotated about a first axis (13), and freely swung about a second axis (12). Since the seat (3) and the back support (4) can be changed in various attitudes, the chair can be changed in various use modes.

Description

Chair

Technical field

The invention of this application relates to chair.

Background technology

As a kind of chair, there is the swivel chair of seat horizontal rotation.Have some swivel chairs to have backrest, and other swivel chairs do not have backrest.In having the swivel chair of backrest, the flat shape at seat forms roughly square usually, and for example office chair is suitable for taking one's seat for a long time.And, because there is backrest, so, when the user is sitting on the chair, always can keep the opposite planar attitude of user consistently with respect to chair.Many swivel chairs with backrest also are equipped with handrail.

In the prior art, be to improve the comfort of taking one's seat at swivel chair that does not have backrest and the subject matter that has in the swivel chair of backrest.Chairs manufacturers pays attention to developing following Chair structure especially, and when the user was sitting on this chair for a long time, this Chair structure can not make this user's fatigue.Chair is sat comfortable importantly certainly.Therefore, it is very suitable being assigned in the improvement of feeling of taking one's seat with exploiting natural resources, even also do not lose meaning now.

Simultaneously, illustrate in patent documentation 1 (JP-A-10-215978) the rest apparatus is arranged to horizontal hunting, the people that takes one's seat can rest two arms on this rest apparatus, and the people that takes one's seat can lean against forward on this rest apparatus.According to this structure of the document, when taking one's seat the people when feeling fatigue such as the desk work of operation personal computer etc., this people that takes one's seat can have a rest in this rest apparatus that goes to the people front side of taking one's seat.

Summary of the invention

The problem that invention will solve

Incidentally, huge transformation has taken place in people's working recently.Following variation has more specifically taken place; promptly; the individual does not have zero-address system (no district system) popular of private tables and chairs in office; the lineup is engaged in the turnover of the project system of project in meeting; with SOHO (small office, family office) is the development of the individualized/small-scaleization of example; thereby the network system service class purpose progress that the individual in the same occupation often meets and promotes business when working together, the company clerk carries out in the company of separate traffic professional extension of setting up etc. in company.

Under the background of this transformation of people's working, exist the trend of respecting individual freedom.Can improve people's creativity by respect with the interaction that in-depth exchanges, thereby be appreciated that the satisfaction and the productivity ratio that can improve the worker individual freedom.So,, need the atmosphere that freely loosen in order to increase individual freedom degree or in-depth interchange.

Chair is the furniture of contact worker health.But we can say that in the prior art, almost the viewpoint that does not help to produce climate of freedom from chair is developed the chair that uses under the non-family occasion such as office etc.And we can say, allow the user to use the motion novelty of chair or diversity and modern design can be mentioned as the necessary condition of chair that helps to produce climate of freedom with joyful mood.

On the contrary, when the people held meet, meeting etc. in office etc., such people will use material etc. usually.Therefore, these materials etc. should be placed on where just become a problem.Loosen on the chair that people can illustrate in above-mentioned document and have a rest.But when people's intention waits by utilizing this chair to hold meet, will produce the problem that such chair lacks versatility, this is because of the desk that needs respectively to place such as the article of material.

The invention of having made this application improves these existing situations.

The means of dealing with problems

The chair of the invention of this application comprises: the seat, and the people is sitting on this seat; The roughly tabular back of the body supports, and this back of the body supports has stayed surface, and the people that takes one's seat can lean against back on this stayed surface; And back of the body framework, the back of the body supports and is coupled on this back of the body framework by being different from surface-supported part.

Then, to carry on the back under the situation of at least one motion in allowing first motion and second motion to support and be coupled on the back of the body framework, the back of the body supports by first motion and rotates around passing the upwardly extending axis of surface-supported side, the back of the body supports by second motion and turns to horizontal level from lowering position, stayed surface directed forward in this lowering position, and directly over stayed surface points in this horizontal level.

In the invention of this application, offering first motion and second motion that the back of the body supports all is respectively that the novelty that conventional chair does not have is moved, the various uses that can provide chair up to now not have to the user by these novel motions.For example, support when carrying out second motion at the back of the body, the back of the body supports can be at its lowering position as backrest, and can be at its horizontal level as handrail or stand.Can support and " playing " by when utilizing first motion, rotating the back of the body to support the people that opposed attitude is sitting on the chair with the back of the body.And because can use the back of the body to support in many ways, perhaps the novelty motion of back of the body support is very interesting, thereby this chair can help to produce the environment that loosens.

The invention of this application comprises many mode of extensions (preference pattern).As a pattern in these patterns, when observing in the face of surface-supported direction, the back of the body supports and forms the long and narrow shape with length direction and width, and on the back of the body framework back of the body is supported to carry out first motion by carrying on the back to support to be coupled to, thereby the back of the body supports around first axle and rotates, and this first axle passes the approximate centre part on length direction and the width.

The shape that the back of the body supports because supporting, the back of the body forms elongated shape, so can for example be changed into the lengthwise attitude and the attitude of growing crosswise according to first motion.Therefore, when the back of the body supported as backrest, the user can select to satisfy user's the hobby or the attitude of physique.And, on being sitting in chair and in the face of carrying on the back the people who supports, make its belly contact back of the body support or elbow is rested in the situation of carrying on the back on supporting, be arranged to present when growing crosswise attitude when the back of the body supports, the user can make belly or elbow be in natural posture, thereby can improve ease of use.

When back of the body support can be carried out first motion and second motion, preferably can increase the use pattern of chair.The invention of this application comprises that allowing the back of the body to support carries out first motion and second structure of moving.

More specifically, in this example, rolling bearing is coupled to the upper end of back of the body framework, thereby the back of the body supports from forward attitude roughly and freely turns to attitude upwards when observing from the side, and the back of the body supports and to be coupled on this rolling bearing, thereby extends on the surface-supported direction that the back of the body supports and upwardly extending axis rotates in the side that the pivot center with joint intersects vertically around passing.Because in this structure center tap vertical rotation, thereby the supporting construction that the back of the body supports becomes firm.

In the invention of this application, also comprise the ameliorative measure of seating mode.In this ameliorative measure, from top view the time, the seat forms the long and narrow shape with length direction and width, and the seat is supported with the approximate centre part of horizontal on described length direction and described width by leg and turns round.

The seat has under the situation of long and narrow shape from top view the time, and when the seat horizontal rotation, the seat changes with respect to the relative attitude that the back of the body supports.In other words, the attitude that the back of the body supports can not only be changed, and the attitude at seat can also be changed.As a result, greatly increased chair and used the variation of pattern, thereby greatly improved ease of use.

When the people rides on the seat, this people that takes one's seat will carry on the back article can be placed in the back of the body support after support is positioned at his or she the place ahead or elbow can be rested the back of the body at him or she and support.In this case, because the seat has long and narrow shape, so the people can ride on the seat with the attitude of loosening.In other words, the user can select to be sitting in the pattern that makes his or her knee close on the chair naturally, perhaps rides on the pattern of on the seat his or her knee being separated.As a result, this selection makes back of the body support have a variety of use patterns more definitely.

In a preferred development example of the invention of this application, back of the body framework is supported to horizontally rotate by the leg post, and the centre of gyration of back of the body framework is consistent with the center of this leg post, and the seat is supported with around the position horizontal rotation that departs from the centre of gyration in the horizontal direction of carrying on the back framework by leg.

According to this structure, because back of the body framework energy horizontal rotation just can support any position that move to his or she next door with the back of the body so the people that takes one's seat need not to change attitude.And, if the center of the horizontal rotation at seat motion is consistent with the center of leg post, then may be because the people's that takes one's seat center of gravity is too far away from the leg post, the instability so the people's that takes one's seat attitude will become.In this case, the centre of gyration at seat is positioned to depart from the leg post, and the people's that takes one's seat center of gravity can be positioned as close to the leg post and place.As a result, can improve the stability of chair.

In another expansion example of the invention of this application, chair also comprises: intermediate support, this intermediate support are set to the upper end of leg post with horizontal rotation; Wherein carry on the back frame fixation on intermediate support, and the seat is coupled to being offset on the part in the outside, with horizontal rotation from the leg post of intermediate support from top view the time.Because back of the body framework and seat are coupled on this common intermediate support, so can simplify the general structure of chair.

In the another expansion example of the invention of this application, the surface-supported profile that the flat shape at seat and the back of the body support forms Pear-Shaped respectively, this Pear-Shaped mid portion in the longitudinal direction forms to constitute has the narrowest portion of narrow width, and not exclusively rounded portions is connected on the both sides of this narrow portion.

Brief description of drawings

Fig. 1 (A) is the front view according to the chair of first embodiment, and Fig. 1 (B) is the right view according to the chair of first embodiment.

Fig. 2 is the plane according to the chair of first embodiment.

Fig. 3 is the profile from the line III-III observation of Fig. 2.

Fig. 4 is the decomposition diagram of seat receiver part.

Fig. 5 is the decomposition view of seat receiver part.

Fig. 6 is the plane of the partly cut-away of seat receiver part.

Fig. 7 is the separation side view of the partly cut-away of seat receiver part.

Fig. 8 (A) is the profile from the line VIIIA-VIIIA observation of Fig. 6, Fig. 8 (B) is the profile from the line B-B observation of Fig. 8 (A), Fig. 8 (C) is the profile that the motion of bar is shown, Fig. 8 (D) is the profile that another example of bar holding device is shown, and Fig. 8 (E) is the plane of the bar holding device of Fig. 8 (D).

Fig. 9 is the decomposition diagram of connector unit.

Figure 10 is the decomposition view of connector unit.

Figure 11 (A) is the plane of connector unit, and Figure 11 (B) is the side view of connector unit, and Figure 11 (C) is the plane of the partly cut-away of connector unit.

Figure 12 (A) is the vertical profile side view of connector unit, and Figure 12 (B) is the profile from the line B-B observation of Figure 12 (A), and Figure 12 (C) is the profile from the line C-C observation of Figure 12 (A).

Figure 13 (A) is the vertical profile side view of connector unit, the back of the body is shown supports the state that can not move to horizontal level, and Figure 13 (B) is the plane of chair.

Figure 14 (A) is the vertical profile side view when the back of the body is supported on its horizontal level, and Figure 14 (B) is the profile from the line B-B observation of Figure 14 (A), and Figure 14 (C) is the plane of chair.

Figure 15 is the plane that the use-case of chair is shown.

Figure 16 is the vertical profile side view according to the connector unit of second embodiment.

Figure 17 (A) is the vertical profile side view according to the connector unit of the 3rd embodiment, and Figure 17 (B) is the profile from the line B-B observation of Figure 17 (A).

Figure 18 is the vertical profile side view according to the connector unit of the 4th embodiment.

Figure 19 (A) is the perspective view according to the connector unit of the 5th embodiment, and Figure 19 (B) is the vertical profile side view according to the connector unit of the 5th embodiment.

The explanation of reference number and symbol

1 leg post (inflator)

2 legs

3 seats

4 back ofs the body support

The narrow portion of 4a

The incomplete rounded portions of 4b

5 back of the body frameworks

8 seat receiver parts

9 intermediate supports

11 connector units

12 second axis

13 first axles

37 rigid bearings

38 auxiliary bearings

40 rolling bearings

The optimal mode that carries out an invention

The summary of (1) first embodiment

Fig. 1 to Figure 15 illustrates first embodiment.The summary of chair at first, is described below with reference to Fig. 1 and Fig. 2.This chair comprises: the leg 2 with leg post 1; Seat 3, this seat 3 is supported by leg post 1, makes the height-adjustable at seat 3; The back of the body supports 4, and the people that takes one's seat can lean against this back of the body and support on 4; And back of the body framework 5, the back of the body supports 4 and is coupled on this back of the body framework 5.

Leg 2 has a plurality of supporting legs 6 from the 1 radial extension of leg post during from top view.Caster 7 is set to the top of each supporting leg 6.Adopt inflator as leg post 1, the inner/outer tube of this inflator can cooperatively interact to move both vertically and to relatively rotate.In this example, enhancing tube 1a constitutes inner core, and urceolus 1b constitutes stationary magazine creel.

Seat receiver part 8 is arranged between leg post 1 and the seat 3.Seat receiver part 8 has the intermediate support (seat receiver base portion) 9 of upward opening.The flat shape of intermediate support 9 forms teardrop shaped, and its width dimensions increases to the other end gradually from an end, and is slick and sly on the whole.And intermediate support 9 constitutes the three-dimensional shape of boat-shapeds, and two end all tilts when observing from the side, and is crooked during from forward observation.And intermediate support 9 is being positioned at the upper end that near the narrow end part place is fixed to enhancing tube 1a.And the bar 10 that is used to move up and down seat 3 exposes from the outside of middle supporter 9.

As shown in Figure 2, the flat shape at seat 3 prolongs in one direction, and is slick and sly on the whole.More specifically, the flat shape at seat 3 constitutes Pear-Shaped, and it is made of narrow 3a and the incomplete rounded portions 3b that extends on the both sides of narrow 3a.And as shown in Figure 2, seat 3 is engaged to departing from the part of leg post 1 of intermediate support 9 rotationally from top view the time.

Back of the body framework 5 forms L shaped, and it has horizontal component 5a at its lower end.Horizontal component 5a is fixed by welding to the rear portion of intermediate support 9.And the rising part of back of the body framework 5 is positioned at the outside of the turning circle at seat 3.Thereby no matter the position of back of the body framework 5 how, seat 3 can both turn round.In other words, seat 3 and back of the body framework 5 can at random turn round relatively.Select the shape of cross section of hollow circular, but can select other cross sectional shape, for example hollow square, hollow elliptical etc. as back of the body framework 5.

The back of the body supports 4 and is roughly plate shape, and its thickness is minimum, and have the stayed surface 4 of general planar ', the people that takes one's seat lean against this stayed surface 4 ' on.Stayed surface 4 ' profile prolong in one direction, and be slick and sly on the whole.More specifically, the same with seat 3, stayed surface 4 ' profile constitute the shape (Pear-Shaped) that constitutes by narrow 4a and the incomplete rounded portions 4b that on both sides, extends.The back of the body supports 4 and is set to dimensionally less than seat 3, but they can be arranged to roughly the same size certainly.

Back of the body support 4 is engaged to the upper end of back of the body framework 5 by connector unit 11.And, the back of the body supports 4 can turn to horizontal level around second axis 12 from lowering position, at this lowering position, and stayed surface 4 ' directed forward shown in the solid line of Fig. 1 (A), and at this horizontal level, stayed surface 4 ' points upwards shown in the chain-dotted line of Fig. 1 (B) and Fig. 2.And the back of the body supports 4 and can rotate around first axle 13 in lowering position, this first axle 13 along thickness direction by the mid portion on length and the width.

Carrying on the back and supporting 4 motions of rotating around first axle 13 is first motion, and the motions that back of the body support 4 is rotated around second axis 12 are second motion.From forward observation the time, the back of the body supports 4 can present the lengthwise attitude or the attitude of growing crosswise according to first motion.And when observing from the side, the back of the body supports 4 can be according to second motion and its attitude is changed to the horizontal level of stayed surface 4 ' points upwards from the lowering position of stayed surface 4 ' directed forward.The back of the body supports 4 and takes sweptback a little attitude at lowering position.

In this specification, adopt term " from forward observation the time " and term " when observing from the side ".In this case, term " from forward observation the time " is meant that from the seat 3 are positioned at nearside and the back of the body and support 4 and be positioned at the rear side direction (in other words, the user supports in 4 situations that fall in the face of stayed surface 4 ' direction at the back of the body) the observation chair, and term " when observing from the side " is meant from horizontal direction observation chair, and this horizontal direction intersects vertically with the direction of " from forward observation the time " and the direction of " from top view the time ".

The details of various piece then, hereinafter will be described.

(2) details of seat receiver part

At first, hereinafter the details of seat receiver part 8 will be described with reference to figure 3 to Fig. 8.For example, as understanding from Fig. 3 or Fig. 7, taper receiving barrel 14 is fixed on the intermediate support 9, and this receiving barrel 14 is engaged on the upper end of enhancing tube 1a.Enhancing tube 1a has the promotion valve 15 that is used to switch free state and lock-out state, and under this free state, this 1a can move up and down, and forbids moving both vertically of this 1a under this lock-out state.It is outstanding from the upper surface of enhancing tube 1a to promote valve 15.As already described, enhancing tube 1a is coupled among the urceolus 1b rotationally.Therefore, intermediate support 9 and each parts of being installed on it can be around the axis of enhancing tube 1a horizontal rotations freely.

Lid shape supporting plate 16 is fixed by welding on the intermediate support 9.The reduction part 16a that the latter half of formation of lid shape supporting plate 16 is provided with lowlyer than first half.The bar receiver 18 that is kept for bar 10 that the promotion valve 15 of enhancing tube 1a is operated is fixed to by screw 19 and reduces on the part 16a.Seat 3 is coupled on the part away from leg post 1 of supporting plate 16, with horizontal rotation by cylindrical shell 20.That is, depart from seat 3 under the state of leg post 1 certain size, seat 3 is coupled on the intermediate support 9.

For example, as Fig. 3 and shown in Figure 7, seat 3 has the structure of loading onto seat cushion 22 on substrate 21, and this substrate 21 is by making such as rigid materials such as glued boards.From top view the time, circular metal (resin) protruding part 23 is fixed on the core of lower surface of substrate 21.This protruding part 23 is coupled in the cylindrical shell 20 rotationally by the lining of being made by synthetic resin 24.

Protruding part 23 has the major diameter part 23a that is stacked on the supporting plate 16.The flange portion 24a that is used to receive the major diameter part 23a of protruding part 23 is formed on the upper end of lining 24.A plurality of slit 24b under shed along the circumferential direction are formed in the lining 24 discretely.Protruding part 23 has base plate 23b.Can keep this protruding part 23 in the non-removable mode that makes progress by screwing screw 25, this screw 25 enters base plate 23b from the bottom by the bottom of intermediate support 9.The lid 26 that the upper surface of intermediate support 9 is formed from a resin covers.

Be used to promote the bar 10 of operation by round metal bars manufacturing as material.For example, as Fig. 4 or shown in Figure 6, from top view the time, bar 10 is arranged to extend through intermediate support 9, and two ends of bar 10 all pass intermediate support 9, and exposes the outside to the intermediate support 9.Resin thumb pad 27 is installed on the exposed portions serve of bar 10.For example, shown in Fig. 4 or Fig. 8 (A), bar 10 with the overlapping part of intermediate support 9 from forward observation the time as M sigmoid roughly, and the left and right sides mid portion of bar 10 constitutes respectively near the promotion part 10a that promotes valve 15.

And, bar 10 as the zone line of the part of M sigmoid roughly in form the center engaging groove 28 of upward opening, and in the part of the left and right sides, form the side engagement groove 29 of upward opening respectively.

Simultaneously, bar receiver 18 is formed from a resin, and has groove part 18a, and this groove part 18a fits closely to the crooked part as outstanding downwards ridged of bar 10 from upside.Be coupled to the center engaging groove 28 of bar 10 and the center copulational protuberance 30 in the side engagement groove 29 and side engagement projection 31 respectively and be separately positioned on the upper bottom surface of groove part 18a, thus outstanding downwards.

Because the carinate sweep of bar 10 is coupled in the bar receiver 18, its attitude is restricted, thereby bar 10 can not be around its axial-movement.And, as understanding from Fig. 8 (C), even on any direction in the direction up and down, promote or during pull lever 10, such bar 10 makes and is the side engagement groove 29 of fulcrum and any motion in the side engagement projection 31, promotes valve 15 then downwards.

For example, as shown in Figure 4, be used for preventing that the otch 32 of interfering with bar 10 is formed on supporting plate 16.And the hole of passing bar 10 33 of intermediate support 9 forms elongated hole respectively, and these holes vertically prolong to allow the vertical rotation of bar 10.And, as shown in Figure 4, in the flat part of bar receiver 18, leave and be used to avoid the off-loading hole 18b that interferes with enhancing tube 1a.

In the present embodiment, bar receiver 18 and bar 10 can be coupled in the bar receiver 18 and accurate location by the sweep with bar 10.So, under this state, can be just when bar receiver 18 is fixed on the supporting plate 16 by screw 19 depending post 10 simply.

And, even when bar 10 moves along the either direction in the direction up and down, also closely be combined together as the side engagement groove 29 and the side engagement projection 31 of rotating fulcrum.Therefore, the shortcoming that does not exist bar 10 to break away from from bar receiver 18.

In this case, be not always to need center engaging groove 28 and center copulational protuberance 30.And copulational protuberance can be formed on the bar 10, and engaging groove can be formed in the bar receiver 18.In addition, bar receiver 18 can be formed by metal.And from the viewpoint of handiness and assurance assembling accuracy, preferred bar receiver 18 should form the integrative-structure as present embodiment.But bar 10 can be kept by the bar receiver that separates two positions.

Fig. 8 (D) (E) illustrates another example of the fit structure of bar 10.In this example, the basic model of bar 10 and bar receiver 18 is identical with the basic model of having described.But this example has following feature, that is, from top view the time outwards outstanding projection 34 by extrusion molding be set to bar 10 from two ends that bar receiver 18 exposes, as being used for the device that anti-stopping bar 10 breaks away from.Therefore, 30,31 pairs of the groove 28,29 that provides in the above-mentioned example and projections are not set.Like this, this fit structure is splendid aspect intensity, and makes processing simple.

(3) fit structure of back of the body support

Then, hereinafter will describe the back of the body in detail and support 4 fit structure with reference to figure 9 to Figure 14.For example, as shown in Figure 9, the back of the body supports 4 and has following structure, that is, seat cushion 36 is placed on by on the substrate of making such as rigid materials such as glued boards 35.In this case, can adopt the structure that cloth etc. is layered on the structure on the substrate 35 or only is made of substrate 35.

For example, as understanding from Fig. 9, connector unit 11 has rigid bearing 37 on the upper end that is fixed to back of the body framework 5, is coupled to auxiliary bearing 38 on this rigid bearing 37, be coupled to rolling bearing (rotor) 40 on rigid bearing 37 and the auxiliary bearing 38 rotationally, be built in stop pin 41 in the rolling bearing 40, be used for to the spring (coil compression springs) 42 of stop pin 41 energizes and be fixed to the back of the body supporting gripper shoe 43 on 4 by horizontal supporting shaft 39.

In the present embodiment, the axis of back shaft 39 is as second axis 12, and the axis of stop pin 41 is as first axle 13.Second axis 12 that embodies by back shaft 39 support at the back of the body 4 the back side core near horizontal-extending, and its bearing of trend is almost parallel with the tangential direction at seat 3 when being arranged in from top view.

Rigid bearing 37 has downward projection 37a, and projection 37a is fixed on the back of the body framework 5 by screw 44.And the top of rigid bearing 37 is configured as board 37b, and this board 37b has discoideus virtual profile.Cut-away portions 45 to the opposition side opening at seat 3 is formed among the board 37b.This cut-away portions 45 is roughly being expanded in 90 scopes of spending.

Auxiliary bearing 38 has two circular board 38a on the board 37b that is stacked on rigid bearing 37 respectively.Two circular board 38a one connections by connecting portion 38b, this connecting portion 38b is engaged in the cut-away portions 45 of rigid bearing 37.Then, as seeing easily from Figure 12, the external diameter of the connecting portion 38b of auxiliary bearing 38 is arranged to the virtual outer surface less than the board 37b of rigid bearing 37.And, on the upper end of the connecting portion 38b of auxiliary bearing 38, form the step part 38c of upward opening.

Therefore, form the conjugate foramen 46 of upward opening by the mating reaction of the connecting portion 38b of the cut-away portions 45 of rigid bearing 37 and auxiliary bearing 38.For example, as shown in figure 10, conjugate foramen 46 is configured as rectangle, thereby from top view the time, the groove width W1 on horizontal direction (axial direction of back shaft 39) is set to bigger than in a longitudinal direction groove width W2.Here, conjugate foramen 46 can be formed directly in the rigid bearing 37.In this case, can omit auxiliary bearing 38.

Rolling bearing 40 forms cylindrical on the whole, and its leading section is configured as forked part 40a, and this forked part 40a boring is with among the board 37b and auxiliary bearing 38 that are coupled to rigid bearing 37.And this forked part 40a is coupled on rigid bearing 37 and the auxiliary bearing 38 by back shaft 39.In the present embodiment, adopt bolt, and keep back shaft 39 in the mode that is difficult for unclamping by nut 47 as back shaft 39.In this case, nut 47 is maintained on the rolling bearing 40 and does not rotate.

Stop pin 41 forms has different diameters, makes the front side have major diameter, and forms the copulational protuberance 48 with essentially rectangular cross sectional shape on leading section.Stop pin 41 is coupled in the rolling bearing 40 rotating, but does not unclamp backward.Therefore, being formed on hole 49 in the rolling bearing 40 also forms and has step-like different-diameter.

And the copulational protuberance 48 of stop pin 41 has rectangular cross sectional shape, and conjugate foramen 46 also has rectangular shape.Copulational protuberance 48 size L (seeing Fig. 9 and Figure 10) in a longitudinal direction is arranged to be slightly smaller than conjugate foramen 46 groove width size W1 in the longitudinal direction, but is arranged to greater than the groove width size W2 of conjugate foramen 46 on width.Therefore, stop pin 41 is coupled to the attitude in the conjugate foramen 46 or is unworthy of being incorporated into attitude in the conjugate foramen 46 having when its axis rotates.The spring 42 that is coupled on the small diameter portion of stop pin 41 promotes stop pins 41 to rigid bearing 37.

The rear end 41a of stop pin 41 has non-circular otch, and this rear end 41a is coupled in the gripper shoe 43 un-rotatably.Then, substrate 35, gripper shoe 43 and the stop pin 41 of back of the body support 4 tighten together by screw 50 under this state.Gripper shoe 43 is fixed on the substrate 35 by screw 51.In this case, stop pin 41 can be fixed on the gripper shoe 43.Be used for being formed on gripper shoe 43 from the 43a of tube portion of outer side covers rolling bearing 40.

(4) motion of back of the body support

As seeing from Figure 12 to Figure 14, the movement travel (range of movement on the axis of back shaft 39) of the copulational protuberance 48 by stop pin 41 is regulated the back of the body and is supported 4 angles of rotation around back shaft 39.And when back of the body support 4 was positioned at its lowering position, stop pin 41 can rotate in rolling bearing 40, and therefore back of the body support 4 can freely be rotated around the axis of stop pin 41.

When back of the body support 4 is positioned at its lowering position, the outer surface of the top contact of the copulational protuberance 48 of stop pin 41 or the connecting portion 38b of close auxiliary bearing 38.In other words, when back of the body support 4 was positioned at its lowering position, stop pin 41 moved backward along the direction antagonistic spring 42 that comes out from rolling bearing 40.For this reason, can not make the back of the body support 4 axial directions along stop pin 41 basically moves.

When having only copulational protuberance 48 when stop pin 41 to present the attitude (that is, the state on the width from forward observation the time) that the axis that is parallel to back shaft 39 extends longly, copulational protuberance 48 just can be coupled in the conjugate foramen 46.Copulational protuberance 48 be not in be parallel to back shaft 39 extend in the situation of long attitude, as shown in figure 13, the copulational protuberance 48 of stop pin 41 supports 4 at the back of the body and stretches when uprightly being provided with and crosses conjugate foramen 46, moves to its horizontal level thereby can not make the back of the body support 4.

On the contrary, as shown in figure 14, when the copulational protuberance 48 of stop pin 41 presents the attitude (that is the state on the width during, from forward observation) of the axis that is parallel to back shaft 39, copulational protuberance 48 is engaged in the conjugate foramen 46, can move to its horizontal level thereby the back of the body supports 4.

Then, the copulational protuberance 48 of stop pin 41 has and is supporting 4 the identical upwardly extending rectangular cross sectional shape in side of longitudinal direction with the back of the body.Therefore, as shown in figure 14, can not make the back of the body support 4 and move to its horizontal level, unless the back of the body support 4 from top view the time, be in along the seat 3 tangential direction extend long attitude.In other words, support 4 and be arranged on the attitude of growing crosswise and just can make the back of the body support 4 to move to its horizontal level up to carrying on the back from its lowering position.

From top view the time, when the back of the body supports 4 when presenting along the seat attitude that 3 tangential direction extends longly, this back of the body supports 4 and is positioned at leg 2 and can the stable support back of the body supports in 4 the zone (that is the zone that produces by connection caster 7).Therefore, even when any part that the back of the body is supported 4 applies big load, chair also never falls down.

On the contrary, shown in Figure 13 (B), from top view the time, when the back of the body supports 4 when being horizontally set on along the seat attitude that 3 radial direction extends longly, the back of the body supports the stable support zone that leg 2 is left in 4 end.Like this, when this end of the back of the body being supported 4 applied big load, chair may fall down.But, can avoid this situation in the present embodiment.

Be in the impetus by spring 42 of stop pin 41 under the state of its horizontal level and be coupled in the conjugate foramen 46 because support 4, remain and do not fall/rotate and out-of-level revolution thereby the back of the body supports 4 at the back of the body.Then, support 4 antagonistic springs 42 and when its horizontal level is mentioned at the back of the body, it is released that stop pin 41 enters the cooperation of conjugate foramen 46, can turn to lowering position thereby the back of the body supports 4.

Mating reaction or the stop pin 41 of stop pin 41 in the conjugate foramen 46 removed the effect that cooperates from conjugate foramen 46 and is classified as: have only when this back of the body support 4 presents just to allow to carry on the back the rotation regulatory function that support 4 moves to horizontal level when growing crosswise attitude when observing from the front; The back of the body is supported 4 remain on its horizontal level and the anti-fall lock function that do not fall; And will carry on the back and support 4 and remain on its horizontal level and horizontally rotating of out-of-level rotation prevents function.As the device that is used to realize these three functions, need device for regulating rotary, anti-fall locking device and horizontally rotate anti-locking apparatus.Adopting a structure to come shared in the present embodiment is three devices, but these three devices can be provided by independent structure.

As can understanding from Figure 12 (A), Figure 13 (A) and Figure 14 (A), no matter how the back of the body supports 4 attitude, the forked part 40a of rolling bearing 40 hides the cut-away portions 45 of rigid bearing 37.Therefore, this cut-away portions is never hooked user's finger.

In this case, the material of bearing 37,38,40 is not particularly limited, and these bearings can for example be made by resin, metal die casting etc.Can not adopt bolt as back shaft 39, but can adopt pin, and by this pins of locking such as snap rings.The back of the body supports 4 upright positions that can fall when observing from the side.Adopting the back of the body to support 4 during, can preferably carry on the back and support 4 angles that should recede a little as the present invention falls as backrest.

(5) chair uses the example of pattern

Can use above-mentioned chair with various patterns.At first, seat 3 has three use patterns, that is: A. user is sitting on the chair that is in the attitude of growing crosswise; B. the user is sitting on the chair that is in the lengthwise attitude; Be sitting on the chair that is in the attitude of growing crosswise with C. user, thereby in crooked two knees, left and right sides shin be placed on the upper surface of chair.

Simultaneously, the back of the body supports 4 and has six use patterns, that is: a. back of the body is supported on the behind that is positioned at the people that takes one's seat in its lowering position; B. the back of the body is supported on the chest side that is positioned at the people that takes one's seat in its lowering position; C. the back of the body is supported on right side or the left side that is positioned at the people that takes one's seat in its lowering position; D. the back of the body is supported on the behind that is positioned at the people that takes one's seat in its horizontal level; E. the back of the body is supported on the front that is positioned at the people that takes one's seat in its horizontal level; Be supported on the right or the left side that is positioned at the people's side of taking one's seat in its horizontal level with the f. back of the body.

Then, the people can adopt various patterns according to use Mode A to the combination of the use pattern a to f of C and back of the body support 4 at seat 3.Support 4 at the back of the body and be set under the state of lowering position, the function of backrest is mainly played in back of the body support 4.

Incidentally, sometimes, when being desirably in the people and using chair, the people loosens by the health that tilts largely.At this on the one hand, since the seat 3 and the back of the body support 4 the two all have elongated shape in the present embodiment, so, seat 3 be arranged at lengthwise attitude and the back of the body support 4 vertically be arranged at longitudinal attitude, then will take one's seat a little place the front side at seat 3 after, can tilt to a great extent his or his the upper part of the body of user.And, because supporting 4, the back of the body has long and narrow shape, so, supporting 4 when being arranged on the lengthwise attitude at the back of the body, the people that takes one's seat can when the back of the body supports on 4 be placed on an arm back of the body and support on 4 the upper surface in that back is remained to.

Support 4 some examples that are arranged at the use pattern under the state of its horizontal level at the back of the body shown in Figure 15.In this case, in Figure 15, support 4 to describe the back of the body with the roughly the same size in seat 3.In the use-case that Figure 15 (A) illustrates, the back of the body supports 4 and is arranged to parallelly with seat 3, and the people is sitting on the chair and back is placed on the back of the body supports on 4 the end face.That is, the back of the body supports 4 as backrest.Because in carrying on the back support 4, have narrow 4a, support 4 thereby the people's that takes one's seat vertebra can not contact the back of the body, so the user can use back of the body support 4 and not have uncomfortable sensation.And shown in chain-dotted line, the user can lean against the back of the body that is horizontal and support on 4, and the user can also be placed on two elbows or an elbow after him or she, and these two elbows or an elbow are placed on the back of the body support on 4.In other words, the user can use the back of the body to support 4 purposes as backrest and handrail simultaneously.

In the example that Figure 15 (B) illustrates, the people that takes one's seat will carry on the back support 4 and be placed on his or her side, use the back of the body to support 4 as handrail then.Use the back of the body to support 4 during as handrail the people, this people can support 4 with the back of the body be positioned at the place ahead of the people that takes one's seat, and two elbows can be placed on the back of the body and support on 4.

Support 4 examples at Figure 15 (C) to using shown in Figure 15 (E) to carry on the back as stand.That is, the user can support on 4 at the back of the body and take notes, and perhaps can support on 4 at the back of the body and place document, notebook computer etc.In Figure 15 (E), the people rides on seat 3.Because seat 3 has narrow 3a, thus the his or her left and right sides of the people's tensible leg of taking one's seat, so the user can ride on seat 3 with the attitude of loosening.

In the example that Figure 15 (F) illustrates, back of the body support 4 is presented on the people the place ahead of taking one's seat and extends than long attitude (as mentioned above, can not adopt this use pattern in first embodiment).In this case, the back of the body supports 4 and can be used as stand and handrail.Be arranged on its horizontal level and people when not being sitting on the chair when the back of the body supports 4, the user can use the seat 3 and the back of the body to support 4 as the material mounting table.

(6) second embodiment (Figure 16)

Figure 16 illustrates second embodiment.This embodiment is the variant that the back of the body supports fit structure among first embodiment.

In this second embodiment, reinforcement 53 is fixed on the top end surface of rolling bearing 40 by screw 54.This reinforcement 53 is coupled in the hole 55 slidably, and this hole 55 is formed on the substrate 35 of back of the body support 4.And reinforcement 53 is kept in the mode that is difficult for unclamping by gripper shoe 43.In addition, stop pin 41 is fixed on the substrate 35 of back of the body support 4, can not rotate.

The advantage of Cun Zaiing is in this embodiment, because reinforcement 53 is coupled in the hole 55 of substrate 35, thereby can make the fit structure of back of the body support 4 more firm.

(7) the 3rd embodiment (Figure 17)

Figure 17 illustrates the 3rd embodiment.The 3rd embodiment is the variant of first embodiment, and it is characterized in that carrying on the back the fit structure of support 4.The difference of the 3rd embodiment and first embodiment is that the copulational protuberance 48 of stop pin 41 forms and has circular section shape.

In this embodiment, when this copulational protuberance 48 was coupled in the conjugate foramen 46, this copulational protuberance 48 was not had a directionality.Therefore, no matter the back of the body supports 4 and has what attitude at its lowering position from forward observation the time, the back of the body supports 4 can both move to its horizontal level, and the back of the body supports 4 and can also horizontally rotate in its horizontal level.Can adopt this structure with user's wish.

(8) the 4th embodiment (Figure 18)

Figure 18 illustrates the 4th embodiment.This embodiment is characterised in that connector unit 11.The basic structure and first embodiment of this embodiment center tap unit 11 are common.Yet, as with the difference of first embodiment, can list following aspect: stop pin 41 is coupled in the rolling bearing 40 and can not rotates; And back of the body support 4 is coupled in the stop pin 41 rotatable.In this embodiment, when back of the body support 4 moves to lowering position and horizontal level, without limits to attitude (directionality).

(9) the 5th embodiment (Figure 19)

Figure 19 illustrates the 5th embodiment.This embodiment is characterised in that connector unit 11.Similar with first embodiment, the connector unit 11 of this embodiment has rigid bearing 37, rolling bearing 40, back shaft 31, stop pin 41, spring 42 and gripper shoe 43.Yet this connector unit 11 does not have the auxiliary bearing 38 of first embodiment, and conjugate foramen 46 is formed directly in the rigid bearing 37.Copulational protuberance 48 with rectangular cross sectional shape is arranged in the stop pin 41, and this is similar with first embodiment on the one hand.

And stop pin 41 remains on the back of the body and supports in 4 the substrate 35, can not unclamp and can not relatively rotate, thereby and slide in the slight distance that also cooperates in the axial direction by screw 50 of stop pin 41.For example placing, bag waits the hook 57 of article to be coupled on the rigid bearing 37.

(10) other

The invention of this application can be embodied as the various patterns except the foregoing description.For example, the seat and the back of the body support Pear-Shaped and the circle shown in being not limited to.Can be provided with such as essentially rectangular, ellipse, two ends and form different shape as circular-arc rectangle, polygon, circle etc.The seat supports with the back of the body can form different shapes.And, can look concrete condition and implement the ad hoc structure of back of the body framework and connector unit in every way.

Be supported for circle or square and the back of the body at the back of the body and support under the situation only have first action, when the back of the body support fit in make that this back of the body supports can be when the part that departs from its core be rotated, the height of back of the body support can change along with its rotation.And the user can play by rotating back of the body support repeatedly.Therefore, when back of the body support can only have first action, the back of the body supports should always not be configured as elongated shape.

Can adopt the structure that independently to adjust back of the body bearing height, perhaps can adopt the structure at the interval that can adjust between seat and the back of the body support (from top view time interval).The back of the body supports can be by two-fold.And the invention of this application can be applied to leg and be fixed to the sort of chair (being irremovable chair) on the floor.Do not have problems even the stayed surface that the back of the body supports is uneven a little or circular yet.

Claims (7)

1. chair comprises:

The seat, the people is sitting on this seat;

The roughly tabular back of the body supports, and this back of the body supports has stayed surface, and the people that takes one's seat can lean against back on this stayed surface; And

Back of the body framework, the back of the body supports and is coupled on this back of the body framework by being different from surface-supported part;

Wherein will carry on the back under the situation of at least one motion in allowing first motion and second motion to support and be coupled on the back of the body framework, the back of the body supports by first motion and rotates around passing the upwardly extending axis of surface-supported side, the back of the body supports by second motion and turns to horizontal level from lowering position, stayed surface directed forward in this lowering position, and directly over stayed surface points in this horizontal level.

2. chair according to claim 1, wherein, when observing in the face of surface-supported direction, the back of the body supports and forms the long and narrow shape with length direction and width, and on the back of the body framework back of the body is supported to carry out first motion by carrying on the back to support to be coupled to, thereby the back of the body supports around first axle and rotates, and this first axle passes the approximate centre part on length direction and the width.

3. chair according to claim 1 and 2, wherein, allow the back of the body to support the upper end that the rolling bearing that carries out second motion is coupled to back of the body framework, thereby the back of the body supports from forward attitude roughly and freely turns to attitude upwards when observing from the side, and the back of the body supports and to be coupled on this rolling bearing, thereby extends on the surface-supported direction that the back of the body supports and upwardly extending axis rotates in the side that the pivot center with joint intersects vertically around passing.

4. according to each described chair in the claim 1 to 3, wherein, from top view the time, the seat forms the long and narrow shape with length direction and width, and the seat is supported with the approximate centre part of horizontal on described length direction and described width by leg and turns round.

5. according to each described chair in the claim 1 to 4, wherein carry on the back framework and supported horizontally rotating, and the centre of gyration of back of the body framework is consistent with the center of this leg post by the leg post, and

The seat is supported with around the position horizontal rotation that departs from the centre of gyration in the horizontal direction of carrying on the back framework by leg.

6. chair according to claim 5 also comprises:

Intermediate support, this intermediate support are set to the upper end of leg post with horizontal rotation;

Wherein carry on the back frame fixation on intermediate support, and the seat is coupled to being offset on the part in the outside, with horizontal rotation from the leg post of intermediate support from top view the time.

7. according to each described chair in the claim 2 to 6, wherein the surface-supported profile of the flat shape at seat and back of the body support forms Pear-Shaped respectively, the mid portion of this Pear-Shaped on described length direction forms to constitute has the narrowest portion of narrow width, and not exclusively rounded portions is connected on the both sides of this narrow portion.

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