CN109069336A

CN109069336A - Chair

Info

Publication number: CN109069336A
Application number: CN201780018995.6A
Authority: CN
Inventors: 菲利普·蒂拉尔
Original assignee: Individual
Current assignee: Individual
Priority date: 2016-01-29
Filing date: 2017-01-27
Publication date: 2018-12-21
Also published as: EP3463242B1; EP3463242A1; FR3047169B1; FR3047169A1; WO2017129912A1

Abstract

A piece of seating furniture with a seat support (S1) and a back (S2), characterized in that the piece of seating furniture has an aid (1,1',2,3,4) for lifting a person sitting on the piece of seating furniture in an upright position, the aid (1,1',2,3,4) having a seat (1) placed on the seat support (S1), and a wire cloth (2) extending over the seat (1) and the back (S2), the wire cloth (2) having a stretching end (21) fixed to the seat (1) and an opposite winding end (23) engaging with a winding part (3) arranged behind the piece of seating furniture, so that winding of the wire cloth (2) by the winding part (3) tensions the wire cloth (2) to disengage the seat (1) from the back (S2).

Description

Chair

Technical field

The present invention relates to a kind of thing to sit on (siege) with chair base supporting part and the chair back.Term " thing to sit on " should be in broad sense On understood, in general including chair, armchair, including any are furnished with a seat and a chair back and suitable for connecing Receive the furniture that people takes a seat.Thing to sit on of the invention be advantageously employed in equipped with the chair of wheel and/or idler wheel for allowing to be easily moved or Wheelchair.The present invention is preferred for using from seating position to stand up position is stood with the people of certain difficulty.

Background technique

For a long time, having existed can be convenient for lifting the thing to sit on that people is located at the stand up position that stands.These things to sit on can be equipped with Hand can be supported on the handrail by handrail, people.Such thing to sit on example can also be enumerated, seat is arranged in a high position, so as to just In being moved to stand up position.A kind of seat especially collapsed, which may also aid in, lifts people.These different things to sit on are also in the prior art It is to need to provide the active force large enough to make one to be restored to stand stand up position to the people being seated.

Document WO2015/071616, JP2001/170113, JP2002/209947, US2012/025572 and US5039165 describes all aid-devices, and having can be tensioned to make one the silk cloth of the seat being kept fixed from it disengaging (or belt).The silk cloth of winding is tensioned between the leading edge of seat and the top of the chair back, limits a slope.But when When people is sitting on the thing to sit on, the silk cloth of tensioning is deformed mainly due to by the buttocks for wrapping up in received people.Silk cloth tensioning not only can So that lifting the buttocks for the people being seated vertically, and the buttocks for the people being seated can be made mobile to the front of thing to sit on, to make one As much as possible stand erectly.Therefore, the silk cloth of tensioning serves a dual purpose: first, slightly lift the buttocks and second of people vertically, The buttocks of people is pushed to the front of thing to sit on.Both liftable people of movement combined are located at the stand up position that stands.

But the defect of these aid-devices is, people can slide on the silk cloth of tensioning, may fall on, leg The people that power is not propped up is especially true.This is because silk cloth generates a kind of horizontal thrust component, cloth is caused to become a kind of slide, people's meeting It slides on.Therefore, people must both legs land, in order to avoid from the silk cloth of tensioning slip.

Summary of the invention

The present invention is directed to by propose it is a kind of can it is effortless or easily lift completely the people being seated be located at stand it is straight The thing to sit on of position is found to overcome defect in the prior art.The present invention, which also aims to, lifts the people's buttocks being seated vertically, and does not have to pair The buttocks for the people being seated imposes forward effect, to move the both feet that its center of gravity lands perpendicular to it.The present invention also aims to can be Implement the present invention on any commercially available thing to sit on.

For this purpose, the present invention proposes a kind of thing to sit on, there is the side for being located at stand up position for lifting the people being sitting on thing to sit on Device is helped, which has the seat being placed on chair base supporting part and the silk cloth extended on seat and the chair back, the silk Cloth have the stretching end for being fixed on seat and with the opposite winding end that is arranged in the subsequent winding unit of thing to sit on and engages so that silk Cloth is by the winding meeting of winding unit so that silk cloth is tensioned, so that seat and the chair back are detached from, seat is mounted to be arranged around the chair back Pivot at lower part is pivoted, so that silk cloth can make seat pivot around pivot, to slightly lift seat.

When pivoting seat, leading edge moves up the circular arc streaked using pivot as the center of circle.Therefore, because seat pivot Turn, increases the upward vertical shift of the buttocks for the people being seated.In view of seat leading edge at the beginning of pivot with regard to substantially vertical shifting It is dynamic, the buttocks of user can roughly vertical movement, while the buttocks by pushing the silk cloth user of the tensioning of the buttocks of user It is pushed to the leading edge of seat.In other words, the compound movement upwardly and forwardly that the silk cloth of tensioning provides, due to seat It pivots and increases.

According to a practical embodiment, seat includes rigid pedestal, after restriction one abuts with chair back lower part Edge, an opposite leading edge and two side edges, pivot are arranged in the rear edge of rigid pedestal；And seat lining Pad, is mounted on the pedestal of the rigidity, stretches end and is fixed on rigid pedestal near leading edge or at leading edge.Just The pedestal of property is supported on the chair base supporting part formed by the frame of thing to sit on.The effect of seat cushion is to ensure that the people being seated has Certain comfort.On traditional thing to sit on, the frame of thing to sit on forms chair base supporting part and the chair back, this chair base supporting part and the chair back The two components are engaged at the chair back lower part corresponding to seat rear portion.The pivot of seat can be positioned at chair back lower part Place, connects with the tail portion of chair base supporting part.

According to a preferred embodiment, seat cushion has the rear portion for being fixed on rigid pedestal and around positioned at leading edge Front and/or leading edge are fixed in the stretching end of the front that the torsion shaft at place is pivotally mounted, silk cloth, pass through under front, with Cause silk cloth that rigid pedestal can be made to pivot around pivot and pivot front around torsion shaft.Therefore, the orientation of front is different In rear portion, overturn because front is subjected to effect by the silk cloth being tensioned.Therefore, the silk cloth that the people being sitting on thing to sit on is tensioned to Preceding movement, so that its buttocks is seated on turnover front.Under the action of the silk cloth of tensioning, turnover front, which turns to, to be sat The front of tool orients, and fixed rear portion turns to the chair back orientation of thing to sit on.Therefore, be sitting in people on turnover front first by Pivot in the pedestal of rigidity and slightly lifted by roughly vertical, and due to front is overturn forward and by imposing work in front of thing to sit on With.As its name suggests, it is located in view of front at the front of seat, therefore, people is pushed forward and up at its buttocks, to make it The both feet that buttocks lands perpendicular to it.By means of the turnover front, the silk cloth of tensioning also causes another movement, this is another Kind movement enhances the pivoting action of seat and the strained movements of silk cloth.According to a practical embodiment, rear portion is in seat It is formed on about 2/3rds surface, front forms the surface of the about one third of seat.Certainly, front and rear is contemplated that it His ratio.

Another advantageous feature according to the present invention, the chair back are equipped with live-roller, and silk cloth passes through on the live-roller, so as to quilt It is transmitted to winding unit.The live-roller can be removably mounted on the top of the chair back, or then be pacified if it is chair or wheelchair At promotion handle.When the tensioning of silk cloth, silk cloth extends to live-roller from the leading edge of seat generally in straight line, and from biography Dynamic roller extends towards winding unit.

Another advantageous aspect according to the present invention, thing to sit on can also have a wheel, and wheel is equipped with locking system and distinctive Control unit, to make winding unit and locking system cooperate.It is in fact important that when the people being seated determines starting side It helps when lifting positioned at the aid-device of stand up position, thing to sit on is completely fixed.It therefore would be advantageous to make the locking system of wheel Starting with the winding unit of aid-device links.

According to a practical embodiment, winding unit has a reel, and reel is by the motor drive that is accommodated in reel Rotation.Winding unit can be removably mounted on the frame of thing to sit on, such as be mounted on behind the chair back, or be mounted on seat Behind or seat under, positioned at being optionally equipped at the chair leg of wheel.

According to a kind of practical embodiment, there are two shaft ends for pivot tool, the two shaft ends are in chair base supporting part and the chair back Between joint portion at be supported on thing to sit on frame.Therefore, it is highly susceptible to being placed in seat on common thing to sit on.

According to another characteristic of the invention, thing to sit on limits the thing to sit on frame to form the chair back and chair base supporting part, wherein has Seat, winding unit, silk cloth and the optionally aid-device of live-roller, are removedly mounted on thing to sit on frame.It is practical On, it is advantageous to aid-device of the invention can be made to be suitable for any commercially available thing to sit on, and can be dismantled.For this purpose, only need by Seat is mounted on the chair base supporting part of thing to sit on, live-roller is mounted at the top of the chair back and winding unit is mounted on seat Behind tool.

Inventive conception is that the tensioning using silk cloth pivots seat, while overturn the front of seat.Live-roller With detachable installation of the winding unit on the frame of thing to sit on, it is advantageous supplemental characteristic.The locking system and winder of thing to sit on Correlation between the starting of part constitutes a kind of advantageous safety precautions.

Detailed description of the invention

Now with reference to the attached drawing provided as non-limiting embodiment, illustrate multiple embodiment party of the invention in more detail Formula.

Attached drawing is as follows:

Fig. 1 is the diagrammatic vertical transverse direction that the chair of the aid-device in stand up position is lifted equipped with help of the invention Sectional view, the not configuration that can be restfully sitting in people on chair；

Fig. 2,3 and 4 be similar to Fig. 1, in for lift people be in stand up position aid-device silk cloth it is continuous Neutral configuration；

Fig. 5 is similar to aforementioned figures, shows the chair with aid-device, and aid-device, which is in, to be lifted people and be in orthostatic position The final configuration set；

Fig. 6 is the perspective view of seat used in chair shown in Fig. 1 to 5；

Fig. 7 is according to another simpler embodiment with the helpful aid-device for lifting people and being in stand up position Chair diagrammatic vertical transverse cross-sectional view；

Fig. 8 is the vertical transverse sectional view of the wheelchair equipped with aid-device shown in Fig. 1 to 6；And

Fig. 9 to 11 is another wheel equipped with the aid-device to work according to principle identical with principle shown in Fig. 1 to 6 The more detailed perspective schematic view of chair.

Specific embodiment

The major function of aid-device of the invention is to lift to be sitting in the people on thing to sit on and be supported on its both feet and be located at straight Vertical position.The function of aid-device of the invention is to install or be arranged on any thing to sit on including commercially available thing to sit on.

Firstly, being used to describe the structure of the aid-device according to the use of a preferred embodiment on chair with reference to Fig. 1. In general, the chair has a chair base supporting part S1, a chair back S2 and multiple for supporting chair leg S3 on the ground.This is chair The completely conventional and common structure of son.Optionally, this chair also has two handle S22, the two handles are in chair back S2 Extend in the prolongation at top, approximate horizontal and parallel orientation.

There is the seat 1 being arranged on chair base supporting part S1 according to the aid-device of the preferred embodiment, be arranged in chair It the subsequent winding unit 3 of son, the silk cloth 2 that winding unit 3 is extended to from seat 1 and is optionally mounted at the top of chair back S2 for example The live-roller 4 being mounted at handle S22.

Fig. 6 shows seat 1 in more detail.Seat has the pedestal 11 of rigidity, and the pedestal of the rigidity can be by one piece of reality The plate of core hollow out if necessary is formed, or is formed by the frame that Assembly rail or handle are constituted.After the pedestal 11 of the rigidity has Edge, the back edge are used to be located in the joint of the chair base supporting part S1 engagement chair back S2 of chair.The back edge is advantageously set There are two shaft end 12a, the two shaft ends are reversely outwardly directed, but alinement, to limit a pivot 12, such as Fig. 1 institute Show.The pedestal 11 of rigidity also forms two parallel edges and a leading edge, and leading edge forms a torsion shaft 13.Therefore, pivot Axis 12 and torsion shaft 13 extend in parallel at the back edge of the pedestal 11 of rigidity and leading edge respectively.Seat 1 also has a chair Seat pad pad, in the preferred embodiment, seat cushion formed one with rigidity pedestal 11 be connected rear portion 14 and one by Torsion shaft 13 is connected to the front 15 of rigid pedestal 11, so that the front 15 can surround torsion shaft relative to the pedestal 11 of rigidity 13 carry out circular movement.This should be readily appreciated that from the point of view of Fig. 6.Entire seat cushion can carry out certain deformation, improve user Comfort.Front 15 has rigid base 16, and the leading edge of rigid base is connected to torsion shaft 13.When front 15 is arranged to prop up Hold when on fixed pedestal 11, seat cushion is fully completed, the imperceptible seat cushion of user be divided into two it is different Part.According to an advantageous embodiment, rear portion 14 accounts for 2/3rds of seat, and front 15 accounts for the one third of seat.But It is that these ratios are not limiting.Obviously, rear portion 14 and front 15 can be formed with roughly the same size.

With reference to Fig. 1, it is seen that the seat 1 of Fig. 6 is arranged on thing to sit on, is supported on chair base supporting part S1, pivot 12 is arranged in The corner formed by the rear portion of chair base supporting part S1 and the lower part of chair back S2.Shaft end 12a can particularly simple be accommodated in the corner In angle, both vertical support was on chair base supporting part S1, and also level rests on chair back S2.Therefore, seat 1 can be freely positioned at chair On son, no setting is required for making seat be fixed on other components of chair.But, however not excluded that seat 1 can be for example in shaft end 12a Place is fixed together with chair.Also it is contemplated that the pedestal 11 of rigidity can reversibly be fixed on chair base supporting part S1, for allowing Seat 1 is pivoted relative to chair.

Here, winding unit 3 is removedly installed on the back leg S3 of chair by a mounting bracket 31.Winding unit 3 It is fixed into and keeps certain distance with chair base supporting part S1, however, it is possible to consider to arrange that winding unit 3 together with mounting bracket 31 Under chair base supporting part S1 nearby, the top of back leg S3.Without departing from the scope of the present invention, winding unit 3 can also be made to pacify Behind chair back S2.Winding unit has a reel, which is advantageously housed in electronic in reel by one Machine driving rotation.Therefore, the structure that winding unit has the compact of the beauty for not influencing chair and is difficult to be aware.

Silk cloth 2 can be made of any material, and condition is that have flexible, stretch-proof.Silk cloth can be with by warp and latitude The fabric or be made of flexible thin film that line is formed.Silk cloth 2 stretches end 21 and a winding rear end 23 before having one, before described It stretches end and is fixed on seat 1, the winding rear end is opposite with preceding stretching end 21 and engages with the reel of winding unit 3.Therefore, silk Cloth 2 can be such as rear visible on the reel of winding unit 3, to generate the tensioning for acting on seat 1.Preceding stretching end 21 It can be fixed at the leading edge of rigid pedestal 11, near torsion shaft 13.Interior stretching end can also be fixed on front 15 Rigid base 16.As it can be seen that silk cloth 2 pads 14 after covering on Fig. 1, pass through between two liners 14 and 15, then in preceding lining Extend under pad 15.Regardless of the preceding definite fixed position for stretching end 21, front 15 must be made relative to fixed pedestal 11 are overturn.Silk cloth 2 also extends in the prolongation at the rear portion of liner 14 on chair back S2.Then, silk cloth 2 is in live-roller Pass through on 4, live-roller is removedly fixed on the handle S22 of chair by another mounting bracket 41.Silk cloth 2 exists as a result, Winding unit 3 is transferred directly in the back side edge of chair.

Therefore, when people is sitting on the chair, buttocks is sitting on the part at the rear portion 14 of the covering liner of cloth 2.Its Back rests on the part of covering chair back S2 of cloth 2, and thigh support is on the unlapped front 15 of silk cloth 2.Since it is scratched Property, silk cloth 2 will not make the people being sitting on chair not feel well.Conversely, because the morphotropism of silk cloth, Si Bu can make one to feel very Comfortably.

Now illustrate the working condition of the aid-device just described referring to Fig.1 with 6 referring to Fig. 2,3,4 and 5 by successive.For letter For the sake of change, chair shows nobody and sits on, to be best understood from the different phase that the stretching of cloth 2 generates.

Referring to Fig. 2, it is seen that silk cloth 2 is placed in tensioning by winding unit 3, so that silk cloth has disengaged from rear portion 14 and chair back S2.Cause This, silk cloth 2 extends to live-roller 4 from seat 1 generally in straight line.More precisely, silk cloth 2 is tensioned, but seat 1 not yet changes Position.In the first stage, the people being sitting on chair still feels meeting so that the back of people is detached from of the silk cloth 2 of chair back S2 Tightly.In other words, the people being seated is imposed forward effect.In addition, its buttocks anteriorly 15 is moved from rear portion 14.

On Fig. 3, silk cloth 2 is further tensioned, so that silk cloth causes seat front 15 to overturn forward around torsion shaft 13.When When people is sitting on chair, this overturning is less obvious, because the buttocks of people is sitting on front 15.But when at this stage, it can feel Feel slightly disengaging front 15.In any case, the tensioning of silk cloth 2 is reinforced, can be further to towards front and being sitting on front 15 The buttocks of people impose effect.It may be clearly seen that the preceding stretching end 21 of silk cloth 2 is located under front 15 on Fig. 3.

On Fig. 4, the tensioning of silk cloth 2 is further enhanced, to cause seat 1 to pivot around pivot 12.Indeed, it is possible to See other than at pivot 12, rigid pedestal 11 is detached from chair base supporting part S1.In view of the pedestal 11 and seat branch of rigidity The angle formed between bearing member S1 is small, and the movement of front 15 is substantially vertical, and horizontal component is very small.Front 15 surrounds turn over always Shaft 13 is overturn forward.Conversely, because seat 1 pivots, rear portion 14 retains towards chair back S2.Therefore, front 15 and rear portion 14 have There is different orientations.In this stage, the roughly vertical raising of the people being sitting on chair, buttocks are supported on front 15.Silk cloth 2 Tensioning reinforce again, further act on the buttocks of user being sitting on front 15.It is same it can be said that the buttocks of user not It is sitting on front 15 again.Therefore, because its buttocks moves forward and up, user's both feet land, lower limb expansion.

On Fig. 5, aid-device is located at final lifting position.It can be seen that seat 1 further diverges from chair base supporting part S1, pivot 12 are supported on the joint between chair base supporting part S1 and chair back S2.Here, the pedestal of chair base supporting part S1 and rigidity Angle between 11 is about 30 °, is moved up so that front 15 is most of, and is seldom moved backward.The orientation of front 15 is always It is identical, that is, it is forwardly directed, and its orientation for turning to chair back S2 is reinforced at rear portion 14.Angle between front 15 and fixed pedestal 11 It further increases, is kept for about 45 °.In the terminal stage, the people being sitting on thing to sit on is almost located at the stand up position that stands, because The substantially the entirety of expansion of the lower limb for being arranged in user is kept for front 15 and its buttocks is no longer sitting on the leading edge of front 15 Such terrain clearance.Front 15 is forwardly directed, and effect is imposed forward to the buttocks of people, so that it is positioned generally perpendicular to The both feet to land.Therefore, reach standing place or close to standing place.People can be located at substantially without any assistance force Stand stand up position.

It can be seen that cloth 2 is made to be tensioned in succession or cumulatively generate a variety of compound actions:

- Si Bu directly imposes effect at the back of user and buttocks,

Seat 1 surrounds the pivot of pivot 12, and

Front 15 surrounds the overturning of torsion shaft 13.

By means of these it is relevant impose effect, people is detached from the chair back in succession, is pushed forward, and moves up, it is final completely In stand up position.

The embodiment just described is a preferred embodiment, still, one that design of the invention can be shown in Fig. 7 It is particularly simple implemented in the more simple embodiment of kind.In the embodiment of the simplification, seat 1' is relative to chair Seat supporting member S1 is fixed.In other words, any movement or shifting not can be carried out between seat 1' and chair base supporting part S1 It is dynamic.Seat 1' can be the component part of chair.On the contrary, the reduced form aid-device has silk cloth 2, a winding unit always 3 and a live-roller 4, it can be similar with first embodiment or identical.Silk cloth 2 is fixed on seat by stretching end 21 before it At the leading edge of 1', and it winds end 23 and is fixed on winding unit 3.In implementing modification, chair can also be fixed on by stretching end 21 At the top of leg S3.It is therefore readily appreciated that the effect for being tensioned cloth 2 is to be detached from chair back S2 and seat 1'.Therefore, it sits People on the chair is imposed effect forward and up, because of the inclined orientation between seat 1' and live-roller 4 of silk cloth 2.It is sitting in People on the chair cannot be lifted completely in stand up position, as in the first preferred embodiment of the invention, still, This simplified aid-device, which still can be convenient, to be lifted people and is in stand up position, and people must provide certain active force and can be only achieved Stand up position.

With reference to Fig. 8, it is seen that a kind of traditional push chairs equipped with preferred aid-device shown in Fig. 1 to 6.Completely conventionally, this Wheelchair has big rear-wheel S4 and front-wheel S5 two small.Seat 1 can be same or similar with seat shown in Fig. 1 to 6.Here, it passes Dynamic roller 4 is removedly fixed on the top of chair back S2.For example, live-roller 4, which can have, can dismantle fixing plug-in connector, it is inserted in shape In pipe end at the frame of chair back S2.Winding unit 3 can be identical as the winding unit of the first preferred embodiment shown in Fig. 1 to 6 Or it is similar.Winding unit has reel 30, and silk cloth 2 passes through the effect of a motor 32 being accommodated in reel 30, surrounds Reel 30 is wound.Winding unit 3 passes through the composition bar that the mounting bracket 31 that can be dismantled is fixed on the frame of wheelchair.

Now with reference to Fig. 9 to 11, another wheelchair is shown, the wheelchair is equipped with aid-device shown in one and Fig. 1 to 6 Same or similar aid-device.This wheelchair also has big rear-wheel S4 and small front-wheel S5.It also has handrail S6 and one Locking system S7, here, locking system act on big rear-wheel S4, to prevent its rotation.In the more perfect embodiment, Aid-device also has the control unit 5 being arranged at a handrail S6.For example, control unit 5 is mountable to be easy to empty at one Between on the flexible pipe 51 that positions.Control unit 5 is connected to winding unit 3 by a cable 52, and is connected by other cables 53 It is connected to locking system S7.Therefore, when user acts on these distinctive control units 5, make locking system S7 and winder Part S3 cooperates.This ensures when people acts on aid-device of the invention, and seat is completely fixed and steadily.Aid-device exists It is located at inoperative position on Fig. 9 and 10, and is located at final lifting position on Figure 11.Advantageously, turnover front 15 can be covered With anti-slip material, to be conducive to the buttocks that hook keeps people here.

By means of aid-device of the invention, people can be subjected to effect, or even return to be lifted from seating position completely Stand stand up position.An advantageous aspect of the invention is that the aid-device is entirely capable of dismantling, so that it is suitably adapted for appointing The thing to sit on of what type.

Claims

1. A seat with a seat support (S1) and a seat back (S2), and assisting devices (1, 1', 2, 3, 4 for lifting a person sitting on the seat in an upright position) ), the auxiliary device (1,1',2,3,4) has a seat (1; 1') placed on the seat support (S1), and a seat (1; 1') and a seat A silk cloth (2) extending on the back (S2) with a stretched end (21) fixed to the seat (1; 1') and a coiled part (3) arranged behind the seat The opposite winding ends (23) engaged, so that the winding of the silk cloth (2) by the winding part (3) will make the silk cloth (2) tension, so that the seat (1; 1') and the seat back ( S2) break away,

It is characterized in that the seat (1; 1') is pivotally mounted around a pivot (12) arranged at the lower part of the seat back (S2), so that the silk cloth (2) causes the seat (1; 1') to slightly Lift to pivot the seat about the pivot (12).

2. The seat according to claim 1, characterized in that the seat (1) has:

- a rigid base (11) defining a rear edge adjacent to the lower part of the chair back (S2), an opposite front edge and two side edges, the pivot (12) being arranged at the rigid base (11) at the rear edge, and

- Seat pads (14, 15) mounted on the rigid base (11), the stretched ends being fixed to the rigid base (11) near or at the front edge.

3. A seat according to claim 2, characterized in that the seat upholstery (14, 15) has a rear portion (14) fixed to a rigid base (11) and a pivot axis around the front edge (13) pivotally mounted front (15), the stretched end (21) of the silk cloth (2) is fixed to the front and/or front edge, passing under the front (15), so that the silk cloth (2 ) will pivot the rigid base (11) about the pivot (12) and the front (15) about the flip axis (13).

4. A seat according to claim 3, characterized in that the rear part (14) is formed on about two thirds of the surface of the seat and the front part (15) forms about one third of the surface of the seat .

5. The seat according to any one of the preceding claims, characterized in that the seat back (S2) is provided with a drive roller (4) on which the silk cloth (2) passes in order to be directed towards the winding part (3) Transmission.

6. A seat according to any one of the preceding claims, characterized in that it has wheels (S4) equipped with a locking system (S7) and a specific control part (5) for winding Part (3) and locking system (S7) work together.

7. Seat according to any one of the preceding claims, characterized in that the winding part (3) has a drum (30) driven by an electric motor (32) housed in the drum (30) rotate.

8. A seat according to any one of the preceding claims, characterized in that the pivot (12) has two shaft ends (12a) whose engagement between the seat support and the seat back The parts are supported on the seat frame.

9. A seat according to any one of the preceding claims, said seat defining a seat frame forming a seat back (S2) and a seat support (S1), characterized in that it has a seat (1), roll Auxiliary means (1, 2, 3, 4) of coils (3), wire cloth (2), and optionally drive rollers (4), are detachably mounted on the seat frame.