WO2016095063A1 - Air-chamber seat - Google Patents

Abstract

The invention relates to a pivotable reclining seat (1) which is rotatably mounted on the wall (S1) of a swimming pool and the lower part (1b) of the seat of which is adjustable in height in a shallow swimming pool (S). The reclining seat (1) has chambers, in the form of a buoyancy chamber (4) and a nozzle chamber (8), which conduct variable quantities of water independently of one another, and the pump (14) is equipped to be reversible and has non-return valves, or is a pump (14) that rotates in one direction and that is operatively connected to a semi-automatic spherical valve (20).

Description

 Air chamber seat

Technical area

The invention relates to a reclining seat in a swimming pool or spa, which is mounted there rotatably mounted, equipped with a nozzle chamber and a Luftzumischung, as well as with a buoyancy chamber, which is controlled by a corresponding pump with a valve control and the seat bottom as needed

height adjustable, according to the preamble of the first claim.

State of the art

Relaxation pools have been known for a long time and only with the invention of the Jacuzzi Jacuzzi, the whirlpool bath with massage jets and air supply in the private area, in hotels and public institutions really got going. Application, forms and technical orientations and their advantages can be read in Wikipedia very well.

Common to all, that they have a correspondingly large and sometimes complex shaped tub, which are filled with appropriate nozzles and the user can control them as desired. Such a SPA is described in the design patent US D683.039S. A SPA with replaceable nozzle inserts can be found in US Pat. No. 5,754,989 and US 2007/0289057 A1.

A seat with discharge nozzles for a swimming pool, which is hinged, is described in the patent WO2013079736A1, as well as a floating seat with a device for discharging a water for massage purposes in the patent US 6,209, 148 B1. Presentation of the invention

The invention has for its object to install in a hot tub or swimming pool one or more reclining seats as independent massage and relaxation, which are adjustable in inclination and equipped with nozzles and nozzle elements, optionally additionally the water temperature of the water outlet can be regulated.

 In swimming pools, reclining seats are little in use, because a swimming pool is a place where swimming and would otherwise take too much swimming pool and therefore relaxing in firmly anchored bubble loungers is kept in a separate part, all the same spray or jet program with the same water leakage and Water temperature received.

The invention is not only intended to give the individual something special to relax with, but also to be able to respond specifically to the patient in the therapeutic application. It is central that the reclining seat can be folded away in the swimming pool when not in use and thus space in the bathroom for swimming or for games space, and if needed, the reclining seat can be quickly raised again, this elegant means recessed in the reclining buoyancy chambers as in the patent application WO 2014/79899, which is the basis for this document. Depending on the buoyancy volume in the buoyancy chamber, the reclining seat, which is attached by means of a pivot bearing on the retaining bracket on the edge of the pool. be folded up and held in various tilted positions, i. as a seat to intensive leg elevation, all this beneficial in the water.

In this regard, the reclining seat may e.g. be divided into three parts, which are, the back, the buttock and thigh part, the lower leg part by means of

Hinges held and connected by flexible hoses. Each of the parts can be controlled separately by means of a passage valve if necessary, so that e.g. in sitting position, only the legs are raised or just the entire body can be brought into a quasi-horizontal position.

 The adjustment of the inclination of the reclining seat is provided on the one hand by means of an electric pump which sucks the water from the buoyancy chamber, on the other hand, a valve which can be opened to admit water into the buoyancy chamber and thus to lower the reclining seat.

These reclining seats have to be relatively large in order to comfortably accommodate people, resp. to allow a massage from neck to toe. Often, however, the swimming pools are not deep enough around the reclining seat around the pivot bearing completely to the pool fold down wall. Therefore, the seat bottom is height adjustable by means of a rail and carriage.

 Today's SPAs here as an umbrella term for whirlpools. Wellness oases, jacuzzi pools and other names are all equipped with an appropriate number of nozzles, with the individual nozzles are designed for pulsating, rotating, oppressive, bubbling water massages, usually the individual nozzles can be set for an even more targeted massage even more. Furthermore, for the massage operation, the water, which acts double-acting from a single electric pump and by means of technical means, is pressurized, and by means of air admixture, a softer, pearling massage can be produced. By means of a variable speed pump, with the addition of air at the same time the pump speed can be increased or decreased, depending on the massage needs.

 The function to a buoyancy chamber, as well as a nozzle chamber, resp. To supply the individual nozzles with water under pressure, by means of an electric pump and a semi-automatic 3-way ball valve, which directs the water according to the ball cock position in one or the other direction, guaranteed. So that the layman can handle the system intuitively, thus easy, the ball valve is connected to an electrical switch, which starts the pump when pressing the switch or turns off when releasing to drain the buoyancy chamber accordingly from the water, otherwise the position of the ball valve by means of a spring and a single drive in the massage mode position. The various massage functions, whether with or without air supply, the water pressure, the hot water supply, strength of the vibration massage, start and stop of the electric motor and the like, can also be easily controlled by the reclining by means of mounted in the armrest control panel. According to the invention this is achieved by the features of the first claim.

Further advantageous embodiments of the invention will become apparent from the dependent claims.

The core of the invention is a reclining seat with two variably fillable water chambers by means of an electric, as variable speed pump and a semi-automatic 3

To operate the ball valve in order to extract in the first ball valve valve position, if necessary, the water in the buoyancy chamber and in the second ball valve position, the nozzle chamber with water under pressure to operate and there at the same time by means of an adjustable air supply into the water flow, the nozzle chamber enriched with air mixture and at Need to adjust the seat bottom height. Short description of the drawing

In the following, embodiments of the invention will be explained in more detail with reference to the drawings. Same elements are in the different figures with the same

Provided with reference numerals.

Show it:

Fig. 1 is a side view of a rotatably mounted reclining element with therein

 Single nozzles, connected to a buoyancy chamber and a water extraction, and an air exchange hose and filter, and a nozzle chamber connected to a water and air supply, as well as individual nozzles connected to individual air lines and a Ablassklappenventil in the buoyancy chamber, a pump, Essenz- and tablet dosing and lighting with a generator in reclining seat, as well as a technical armrest with individual nozzles and command buttons

Fig. 2 is a functional diagram of the water supply by means of a ball valve with a

 electrical contactor. Spring, rack and gear in operative connection with the rotatable ball with its T-bore, the pump, the water guide, the suction and discharge line, the valve opening on the buoyancy chamber and control means in the armrest

Fig. 3 is a three-dimensional view of two reclining seat elements in a swimming pool, once extended in the raised position with the height-adjustable seat bottom and once raised in the park position with the height-adjustable seat bottom.

Only the elements essential for the immediate understanding of the invention are shown. Way to carry out the invention

Fig. 1 shows a side view of a rotatably mounted reclining seat 1 with a pivot bearing 2 connected to the holder 3, wherein the reclining seat 1 has a buoyancy chamber 4 with a water extraction pipe 5, and an air exchange hose 6 and air filter 7, and a nozzle chamber 8 connected to a water supply pipe. 9 and air supply 10 and air filter 7, as well as individual nozzles 11 connected to a branched air line 12, and an air filter 7 and a discharge flap valve 13 in the buoyancy chamber 4, and in the reclining seat 1, an electric pump 14, an Essenz- 15 and a tablet dosing 15a, as also a lighting 16 with alternator 17, and an armrest 18, and an air valve 19 and a

Ball valve 20,

The reclining seat 1 can be made of plastic or metal or in mixed construction and has an integrated bicameral system, i. a buoyancy chamber 4 and a nozzle chamber 8, both of which are variable and independent

Run water. Is the reclining seat 1 in the park position by the buoyancy chamber 4 is filled with water, i. the discharge flapper valve 13 has been opened and thus the reclining seat 1 has been pivoted downwards about the pivot point of the rotary bearing 2 in the swimming pool S due to gravity, possibly with the aid of a closing spring. Thereafter, the Ablassklappenventil 13 with its sealing ring. be closed again by spring action and thus the reclining seat 1 can swing up again by the pump 14 with the correspondingly provided 3-way ball valve 20, the water by means of the water extraction pipe 5 from the buoyancy chamber 4 into the nozzle chamber 8 passes, from there into the water Swimming pool S, consequently the reclining seat 1 swings up until the pump 14 is switched off manually. respectively. automatically at a defined float position.

The change in the volume of water in the buoyancy chamber 4 is kept depressurized by means of an air exchange hose 6. The air filters 7 are at the two

Side ends of the air exchange hose 6 are attached and each represent a hydrophobic filter, ie are not water-permeable, as exemplified by the company. WL Gore & Associates and on the other hand, the air filter 7, which above the water line indicated in Fig. 5 WL, is at the same time exerts a noise-damping effect as soon as the air flow is active, which can take place in both directions.

If the 3-way ball valve valve 20 is set in the second direction, water is sucked up from the swimming pool by means of the suction nozzle 21 and the pump 14 and pressed into the nozzle chamber 8, which is part of the reclining seat 1 and where the individual nozzles 11 are located as well eg for the back, the thigh and the lower leg area, thus the water now shoots through the individual nozzles 11 and with pressure to the outside in the pool S, resp. powerful, depending on the speed of the pump 14, reaches the body parts of the user of the reclining seat 1. The individual nozzles 1 1, as shown in the prior art, can be configured with various nozzle arrangements for a rotating, wider or narrower jet and the like. In addition, an air supply 10 with the air filter 7 and air valve 19 is mounted on the nozzle chamber 8, so that if necessary, a certain amount of air can be added to the water, which makes the water pearls and a larger and softer

Water volume simulated.

The passive introduction of air after the Venturi effect may not act sufficiently and can by means of a separate air line 12, also equipped by an air valve 19, which individually operates the individual nozzles 11 with air by means of the Venturi effect and thus can produce a more effective effervescent effect , Again, an air filter 7 u.a. the noise insulation. Of course, the various air filters 7 described above can be combined in a large, central, similar air filter 7.

If an even more intense bubbling, resp. Massage effect available, so by means of an air pump 34, not shown here, as described in Fig. 2, additional air can be brought under pressure into the water.

In addition, the reclining seat 1 is a lighting 16, in the form of LED lamps or an LED chain designed as a light bar, which receives the power from a transformer that supplies the 24 V DC pump 14, or the power is generated by itself a mounted on an air line 12 alternator 17 which is driven by an impeller or the like and thus supplies power. The armrests 18 are pivotable and have further individual nozzles 1 1, wherein one armrest 18 has control buttons 22 for controlling the pump 14, the other - or both - armrests 18 are removable, an air line 12 which is extendable or shaped as a stretchable spiral so that a continuing massage can also take place on the breast and abdomen.

The reclining seat 1 further has a closable opening, which serves there to enter essences by means of an essence metering 15, which dissolve slowly when using the massage or bubbling function and deliver a corresponding fragrance in the swimming pool. Instead of the nozzle chamber 8, the

Essenzdosierung 15 also be mounted in the air supply 10 or air line 12. Another closable opening in the buoyancy chamber 4 is for administration of slow dissolving chlorine tablets or similar chemical agents, so as to prevent bacterial contamination of the water in the buoyancy chamber 4 by means of the tablet dosage 5a, which is an advantageous measure when the buoyancy chamber 4 over a long period of time is not in operation. In addition to the tablet dosing 15a, the reclining seat 1 can be automatically activated from time to time, so that the water circulates in the reclining seat 1 and thus ensures a "flushing" of the nozzle chamber 8 and buoyancy chamber 4.

Fig. 2 shows a functional diagram of the water supply by means of a ball valve 20 with an electrical contactor 27, spring 26, rack 25 and gear 24 in operative connection with the rotatable ball 28 with its T-bore 29, the rotating in one direction pump 14, the water supply by means of the intake nozzle 21, intermediate pipe 30, water supply pipe 9, the discharge opening 13 on the buoyancy chamber 4 and control means in the armrest 18th

It is crucial that the user of a reclining seat 1 without operating instructions can comfortably operate and adjust the device in the water. If the reclining seat 1 is folded down to the wall of the swimming pool, which also corresponds to the rest position and the user now wants to use the reclining seat 1, he must first swing the device in the position he would like to swing. This is done by means of actuation of the lifting button 23, which is coupled to the 3-way ball valve 20 and by means of a gear 24 which is in effect with the rack 25. The toothed rod 25 acts against a spring 26, wherein at the stroke end, a contactor 27th is appropriate. Is pressed by hand or foot on the lift button 23, thus the ball 28 rotates in the ball valve 20, which is in operative connection with the gear 24 by 90 ° degrees, so that the mounted in the ball 28 T-bore 29 is aligned so that the water, which is located in the buoyancy chamber 4, is sucked by means of the water extraction pipe 5 and intermediate pipe 30 to the pump 14. Finally passes from there under pressure via the water supply pipe 9 into the nozzle chamber 8 and is guided via the individual nozzles 11 in the swimming pool S. By pressing on the lifting button 23, which rotates the ball 28 by% rotation, then activates the electrical contact on the contactor 27 and starts the pump 14 and raises the reclining seat 1 accordingly. When the lifting button 23 is released, the spring 26 pushes the rack 25 up, rotates the gear 24 which is in operative connection with the ball 28, at the same time back to the former position, so that the T-hole 29 is ready for the massage or bubble function and which at the same time corresponds to the standard position of the ball valve 20. Such a semi-automatic ball valve 20 is extremely inexpensive to manufacture and fulfills all the desired functions, with regard to safety, space requirements and convenience. Of course, a 3-way electric ball valve 20 may be used. The lifting button 23 also has a lock 31, so that in case of carelessness, the reclining seat 1 can not be activated.

If now the bubble or massage function is called, the user presses the control button 22 on the armrest 18 or on the remote control not shown here, and thus starts the electric pump 14. The water is now from the intake 21, which extends into the pool S sucked and passed via the ball valve 20 to the intermediate pipe 30 to the pump 14 and under pressure to the water supply pipe 9 and finally enters the nozzle chamber eighth

The rudimentary functional image also shows optional facilities that increase the use of the reclining seat 1, such as the feeder 32, which allows the feeding of hot water. This is advantageous because a swimming pool often does not have the temperature that you would like to have when you are practically immobile on a reclining seat 1, so that at least locally at the individual nozzles 11 pleasantly warm water flows out. Are the reclining seat 1 side cheeks attached, not shown here, the heat remains much longer and more intense, because it does not mix so quickly with the rest of the swimming pool water. Downstream of the pump 14, an air introduction can be mounted, which is a passive air supply 10 with the adjustable air valve 19, which can be adjusted for example by means of a Bowden cable or electrically by means of the knob 33 on the armrest 18 or it is instead of the passive air supply 10th by means of the Venturi effect, an electric air pump 34 which actively introduces the air into the water flow WS and by means of the control buttons 22, the air volume can be adjusted electrically, and in addition an air heater 35 can be connected upstream of the air / water mixture instead of the hot water supply heated.

In order to obtain an optimal massage function, it is advantageous that the speed of the motor of the pump 14 can be regulated, which takes place by means of the controller 36 and also by means of the control buttons 22 on the armrest 18 can be made comfortable and there may also have a display, which displays desired information.

Identical to the attachment of the lifting button 23, e.g. laterally on or near the holder 3, the lowering button 37 can also be mounted opposite, laterally or close to the holder 3, which operates the discharge flap valve 13 via a linkage or Bowden cable 38 on the buoyancy chamber 4. This allows the user to lower or raise the reclining seat 1 at will at any time without having to get out of the swimming pool.

Also, the pump 14 may be reversible and can thus be dispensed with the ball valve 20: to bring the reclining seat 1 from the vertical position to a raised to horizontal position, the pump 14 receives the command to the connected electric motor, for example, clockwise to run let and thus drain the water from the buoyancy chamber 4 via water extraction pipe 5 and 21 intake into the pool S, wherein in the water extraction pipe 5 a check valve intervenes, which opens in this operation, as soon as a pressure difference of about 0.2 bar prevails. A second check valve in the water supply pipe 9, however, remains closed. If the pump 14 is allowed to run in the opposite direction by means of the electric motor, then the check valve closes in the water extraction pipe 5 and the check valve in the water supply pipe 9 opens for it. The water from the pool S flows now via intake 21 and via water supply pipe 9 under pressure into the nozzle chamber 8 and from there via the one-jet nozzles 1 1 back into the swimming pool S.

Fig. 3 shows a three-dimensional view of two reclining seats 1 in a swimming pool

 S, once extended in the raised position A with the height-adjustable seat bottom part 1 b and once raised in the parking position B with the height-adjustable seat base 1 b.

So that a reclining seat 1 is comfortable and can also be used comfortably by tall people, it has a certain length. In the parking position B of the reclining seat 1 is located on the pool wall S1, usually the pool floor S2 but not deep enough, respectively. the reclining seat 1 too long and thus the reclining seat 1 can not be swung back enough. In order to solve this unsatisfactory circumstance while not limiting the functionality of the reclining seat 1, the reclining seat 1 is made in two parts, which comprises a back part 1 a and a seat bottom part 1 b. The back part 1a is by means of

Rotary bearing 2 on the bracket 3, which is mounted on the pool wall S1, rotatably mounted and has a rail 39. The seat, the lower leg support, the buoyancy chamber 4 and the discharge flap valve 13 are combined in the seat bottom 1b and has a carriage 40 which fits into the rail 39, so that if the reclining seat 1 is swung up, i. in the

Position A, the seat bottom 1 b is in the extended position and thus represents a comfortable support surface for each person. If the reclining seat 1 is to be pivoted back into the parking position B, then the seat bottom 1b can touch the pool floor S2 and upon further pivoting of the recliner seat 1 to the swimming pool wall S1, the seat bottom 1b moves, possibly even with it

Ground roles fitted, at the back of 1a high and thus shortened the reclining seat 1 accordingly. Not shown here, the corresponding hoses, such. B. water extraction pipe 5, air exchange hose 6, air line and, if necessary, electrical line for a special lighting in the seat base 1 b. which continue to function and are flexibly connected to the back part 1a.

Thus, the reclining seat 1 safely pivots back to the pool wall S1, a correspondingly sized return spring 41 is installed on the pivot bearing 2. So that the seat base 1 b when Hochschwenken the reclining seat 1 safely extends again, generated by means of the buoyancy of the buoyancy chamber 4th which of the water is emptied and ultimately represents an air-filled canister, an extension spring, not shown here, which is fastened on the one hand to the seat base 1 b and on the other hand on the back part 1a and in this way ensures that the reclining seat 1 is extended. It is also conceivable a pull rope on the seat base 1 b, which is attached by means of a pulley at the end of the back part 1 and the pull rope is fastened to the pool wall 1 a and for pivoting the back part 1a positively controlled the seat bottom 1b on the rail 39 to the lower end of the back part 1 a is pulled, this simply by means of its own buoyancy.

In addition, an armrest control 18 a is mounted on the armrest 18, which the armrest 18 when pivoting the reclining seat 1 in the parking position B forcibly controlled in a quasi-vertical position against a spring force in

 Turning mechanism rotates. The rotation can be up or down, depending on the positioning of the armrest 18 on the reclining seat. 1

In addition, the head part 42 which is located approximately at the height of the pivot bearing 2, raised and / or pivoted so that the user's head can relax lean against it and when not in use, the head part 42 is elegantly sunk.

It is also advantageous if the back and seat section has an adapted body shape, i. light and soft indentations in the back and buttocks. Also, the surface of the reclining seat 1 with a z. B. closed-cell PU layer coated or manufactured, so that a kind Matratzengefühi arises and the surface is not just hard.

Of course, the invention is not limited to those shown and described

Embodiments limited. LIST OF REFERENCE NUMBERS

1 reclining seat

 1 a back part

 1 b seat base

 2 pivot bearings

 3 bracket

 4 buoyancy chamber

 5 water extraction pipe

 6 air exchange hose

 7 air filters

 8 nozzle chamber

 9 water supply pipe

 10 air supply

 11 individual nozzle

 12 air line

 13 discharge flap valve

 14 pump

 15 essence dosage

 15a tablet dosage

 16 lights

 17 alternator

 18 armrest

 18a armrest control

 19 air valve

 20 ball valve

 21 intake manifold

 22 control button

 23 Lift button

 24 gear

 25 rack

 26 spring

 27 contactor

 28 ball

 29 T-bore

30 intermediate pipe 31 lock

32 feeder

 33 knob

 34 air pump

 35 air heaters

36 controllers

 37 Lowering button

 38 Bowden cable

 39 rail

 40 sleds

41 return spring

 42 headboard

S swimming pool

 S1 Pool wall S2 Pool floor

WS water flow

 A position swung up

B parking position

Claims

claims Reclining seat (1) pivotally mounted on a pivot bearing (2) and fixed by means of a holder (3) on the swimming pool wall (S1)  characterized,  that the reclining seat (1) has two integrated chambers, in the form of a  Buoyancy chamber (4) and at least one nozzle chamber (8) which independently carry variable amounts of water and the pump (14) leads water under pressure for the massage and by means of a ball valve (20) or a check valve set the buoyancy chamber (4) emptied  or and the seat bottom (1b) is attached to the back (1a) by means of a rail (39) and slide (40) and spring return mechanism. Reclining seat (1) after the first claim  characterized,  in that the pump (14) is reversible, wherein a check valve is located in the water withdrawal tube (5) and another check valve is located in the water supply tube (9) Reclining seat (1) according to one of the preceding claims  characterized,  that the unidirectional rotating pump (14) is in combination with the  semi-automatic 3-way ball valve (20), which acts the water by means of manual actuation of the lifting button (23) on which a spring (26) and a contact surface to the contactor (27) and at the same time in operative connection with the ball (28) the one T-bore (29), the water promotes activation of the pump (14) from the buoyancy chamber (4) in the swimming pool (S) and when manually releasing the lift button (23), the ball (28) back in the normal position and by means of actuation the control button (22) the pump (4), the water from the swimming pool (S) via the intake manifold (21) flows under pressure into the nozzle chamber (8). 4. reclining seat (1) according to one of the preceding claims characterized, in that a direct air supply (10) or a branched air line (12) is fitted to the nozzle chamber (8) for producing a water-air mixture, equipped with an air valve (19) for a passive air introduction or for an active one  Air introduction by means of an air pump (34). Reclining seat (1) according to one of the preceding claims  characterized,  in that the unidirectional or reversible pump (14) permits a variable speed and thus promotes a variable amount of water when needed. Reclining seat (1) according to one of the preceding claims  characterized,  in that at least two technical elements are attached to the intermediate pipe (30) or to the water supply pipe (9), namely, a feed (32) for  Hot water. Pump (14), air pump (34), air supply (10). Reclining seat (1) according to one of the preceding claims  characterized,  that the tilt adjustment of the reclining seat (1) in the direction A means  Water extraction from the buoyancy chamber (4) and lowering into the  Parking position B by opening the discharge flap valve (13). Reclining seat (1) according to one of the preceding claims  characterized,  in that an air filter (7), which is hydrophobic and fulfills a noise-damping function, is attached individually to the air exchange hose (6), air supply (10), air line (12) or is coupled to a large air filter (7). Reclining seat (1) according to one of the preceding claims  characterized,  in that an air heater (35) is connected upstream of the air supply (10) or air line (12). 10. reclining seat (1) according to one of the preceding claims  characterized, that the pump (14) is in the reclining seat (1) or in the holder (3). Reclining seat (1) according to one of the preceding claims characterized, that in the nozzle chamber (8) or in the air supply (10) or air line (12) a closable opening for a Essenzdosierung (15) is mounted and if necessary in the buoyancy chamber (4) has a closable opening for a Tablet dosing (15a) is attached. Reclining seat (1) according to one of the preceding claims characterized, that on the armrest (18) control buttons (22), display, knob (33) and Single nozzles (1 1) are attached and to the armrest (18) a Armrest control 18a may be attached, which rotates the armrest (18) during pivoting of the reclining seat (1) in the parking position (B) positively controlled in a quasi-vertical position against a spring force in the rotating mechanism or Armrest (18) is removable if necessary and has an adjustable length air line (12) or and a water supply pipe (9). Reclining seat (1) according to one of the preceding claims characterized, in that the reclining seat (1) has lighting (16) which is fed by a low-voltage transformer or the current is generated by means of the alternator (17) which is driven by the water flow (WS) or by the air flow in the air line (12). Reclining seat (1) according to one of the preceding claims characterized, that the spring return mechanism is a return spring (41) which on the seat bottom (1 b) and the back part (1a) is fixed and the seat bottom (1 b) always away from the pivot bearing (2) presses or attached to the seat bottom (1 b) a pull rope is and together with a pulley on the back (1a) and Attachment of the pull rope to the pool wall (S1), constitutes a forced control and always moves the seat base (1 b) away from the pivot bearing (2) when the reclining seat (1) is raised. Reclining seat (1) according to one of the preceding claims characterized, in that the one-piece reclining seat (1) or the multi-part reclining seat (1) has at least one of the following properties, which means that the back part (1a) and the seat bottom part (1b) have laterally raised cheeks, that the reclining seat (1) as a whole or the back part (1 a), seat bottom part (1 b) is shaped like a body that the surface of the reclining seat (1) has a closed-cell, compressible and elastic surface.