RU2250067C1 - Office or domestic arm-chair and device for physical stretching of legs in sitting posture - Google Patents

Abstract

FIELD: manufacture of furniture; arm-chairs for long-distance trains and personnel transport facilities.

SUBSTANCE: proposed arm-chair is provided with built-in stretching units with pneumatic loaders and force control system. Each stretching unit is made in form of individual module provided with pneumatic loader and swinging lever mounted on body. Footrests are mounted for motion along lever and may be reset and locked in neutral position. Body is located in hollow elbow-rest at level of seat. Physical leg stretching unit includes pneumatic cylinders articulated on body; pneumatic chambers of these cylinders are brought into communication. Kinematic linkage connecting the rods of cylinders with power levers is provided with cam mechanism having slotted disk receiving the pins secured on cylinder rods. When rods are fully extended, pins are located at far wall of slots.

EFFECT: comfort for user due to reduced hypodynamia.

10 cl, 5 dwg

Description

The invention relates to furniture and can be used in the development of home or office chairs that provide increased comfort to the user of the chair, in particular, to reduce the effects of physical inactivity for a long time in the chair. The invention can also be used on vehicles, for example, in long-distance trains, airplanes, buses, as well as in personal vehicles, the owners of which want to have increased comfort on long trips.

The emergence of new technologies related to computers and televisions has significantly changed the working and leisure conditions of the majority of the world's population, and unlike a non-computerized society, it is necessary for a modern person to create conditions for comfortable physical exercises directly at the workplace or at home, mainly in a sitting position a chair with a built-in system for performing physical exercises. The chair should ensure its operation both in normal mode and when performing physical exercises with the regulation of the applied force in accordance with the requirements of the user and with the exception of injuring him when the physical warm-up is terminated.

An office or home chair is known that contains a base, seat, backrest, armrests and a means of physical leg warming built into the chair, which is an exercise bike mounted under the chair seat with pedals that are advanced forward and are placed on the reclining front wall of the chair (see US Pat. No. 5,470,298, NKI 482/130, 11/28/1995). The exercise bike, like any other friction type loader, provides user safety. Sitting in this chair, you can perform only one exercise with alternating movement of legs back and forth, simulating cycling. In the working position, the exercise bike occupies a fairly large space in front of the chair. To bring the exercise bike to its working position and to clean it, you need to get up from the chair, which makes this design not convenient enough for the user.

A passenger seat is also known that contains a base, a seat, a back, armrests and two means of physical leg warming built into the chair, each of which has a tubular cylindrical body fixed to the seat of the chair with a spring-loaded retractable rod, at the lower end of which a spring-loaded swinging foot support is fixed ( see application EP No. 1304144 A1, A 63 B 23/04, 04/23/2003). The technical solution proposed in this application can be used in any chairs, however, its possibilities for performing exercises are extremely limited both in the nature of movements and in the amount of effort. Stoppers are not provided in the loaders, which makes it possible to obtain light scratches or bruises if the foot falls off the support. In addition, the leg support is always in front of the chair, which creates certain inconvenience when using the chair.

Closest to the proposed invention in terms of essential features is a chair containing a base, seat, back, two means of physical leg warming built into the chair, each of which has a piston pneumatic loader kinematically connected with a piston pneumatic loader, a swinging power arm with a support mounted on it for the leg and the force control system on the swinging power arm, including the receiver connected to the piston pneumatic loaders, is set lenny under the seat. In this chair, piston pneumatic loaders are placed under his seat, and the swinging power levers are brought forward immediately in front of the chair seat. The swinging power levers are connected to the piston rods by a kinematic transmission, which includes a multi-link articulated mechanism and flexible traction. The force control system includes an electronic control unit, an air compressor, and sensors monitoring the operation of the means for physical warming up the legs (see PCT application No. WO 97/45168, A 63 V 21/008, 04/04/1997). The known design provides both alternate and simultaneous movement of the legs back and forth with the regulation of the applied force, which provides a variety of physical loads when performing exercises. User safety is provided by high-speed electrically operated drain valves. However, the accepted arrangement of placing physical exercise equipment in the chair is inconvenient for the user, since the swinging levers are always in front of the chair, and such placement is acceptable for the simulator, but not acceptable for the home or office chair, where the space in front of the chair should be free. The adopted scheme for regulating the force on a swinging power arm requires a compressor and an electronic control system in the chair, which makes it difficult to use it in home chairs, which can be placed anywhere in the living room. In addition, the presence of an electronic control system complicates the operation of the chair. The design has a very large mass, which also makes it unacceptable for movable chairs (home or office).

A large number of means are known for physical warming up, including for physical warming up of legs, in which air compression in piston cylinders is used to create force. As a prototype, a means for physically warming up the legs in a sitting position was adopted, comprising a pneumatic piston loader with a pneumatic piston cylinder, a swinging power lever with a foot support and a kinematic transmission connecting the swinging power lever with the piston rod. The kinematic transmission includes a multi-link articulated mechanism containing a rigid rod and a single-arm rocking chair, and a flexible rod connecting the rigid rod to the rod (see PCT application No. WO 97/45168, A 63 V 21/008, 12/04/1997). The main advantage of pneumatic loaders is associated with a wide range of load control and the absence of any leaks. A disadvantage of the known pneumatic loaders is that they provide only one-sided loading during the stroke of the piston (air compression). During the reverse movement, it is necessary to hold the swinging power lever and if the lever is accidentally released, the user risks injury.

The task to which the invention is directed is to create a chair and means for physical warming up of the legs, providing increased comfort to the user due to the ability to perform physical exercises in a sitting position, which do not interfere with the use of the chair in normal mode (performing any work) , the operation of which provides a reduced likelihood of injury to the user. Another objective of the invention is the creation of a chair during operation of which the user himself can choose the most acceptable mode of operation of the chair. Another objective of the invention is the creation of a chair equipped with built-in means for physical warming up of legs, the appearance of which will not differ significantly from the usual forms of home, office or other working and passenger seats. An additional object of the invention is the creation of a chair that the user can freely move in the room and place it anywhere without reference to the power supply system. Another objective of the invention is the creation of a chair in which, when performing physical exercises, the efforts exerted by the user remain virtually unchanged and are regulated directly by the user. An additional object of the invention is to provide a means for physical warm-up of legs, the design of which allows its effective use both for the right and left legs.

The stated technical problems are solved in that an office or home chair containing a base, seat, back, two means of physical leg warming built into the chair, each of which has a piston pneumatic loader and a swinging power arm kinematically connected with the piston pneumatic loader with a support mounted on it for the foot, and a force control system on the swinging power arm, including a receiver connected to the piston pneumatic loaders mounted under the seat, with According to the invention, it is equipped with hollow armrests, and each means for physical warming up of the legs is made in the form of an autonomous module, which includes a supporting body, inside of which there is a piston pneumatic loader, and a swinging power arm extending downwardly pivotally mounted, while the leg support installed with the ability to move along the swinging power arm with the permutation from the worker to the neutral position and fixing it in the indicated positions, and the supporting body is installed in Lost armrest and fixed it on the seat of the chair level.

In addition, in the working position, the leg support is installed on the lower part of the swinging power lever, while the supports for the right and left legs are mounted on the levers towards each other, and in the neutral position, the leg support is installed on the upper part of the swinging power lever, while the supports for the right and left legs mounted on levers parallel to each other and the side edge of the seat of the chair.

The force control system on the swinging power arm is equipped with a control valve block located between the receiver and the piston pneumatic loaders and includes an input manifold to which both piston pneumatic loaders are connected, an output manifold to which the receiver is connected, and an atmospheric air return check valve connected to the input manifold, a parallel check valve for supplying compressed air to the receiver and a valve-switch modes connecting the input and output manifolds between each other, and a controlled pressure control valve in the receiver, connected to the output manifold.

At the same time, the control valve block is placed on one of its armrests.

In addition, each armrest is equipped with a sash that covers its cavity from the outside.

To achieve the goals in a means for physical warm-up of legs in a sitting position, containing a power structure, on which a piston pneumatic loader with a pneumatic piston cylinder, a swinging power lever with support for the legs and a kinematic transmission connecting the swinging power lever with the piston rod rod are fixed, according to of the invention, the piston pneumatic loader is equipped with a second pneumatic cylinder, made similar to the first pneumatic cylinder and installed steam Along with it, both cylinders are pivotally mounted on the power structure, and the kinematic gear is equipped with a grooved cam mechanism, which includes at least one disk with two arc slots located diametrically opposite to each other, in each of which there is a finger fixed respectively on one of the rods of the pneumatic cylinders, while the disk is mounted on the axis of the power lever so that each slot is placed symmetrically relative to the longitudinal axis of the lever; when the rods are fully extended, both fingers are located at the far wall of the slots; pneumatic cavities of the cylinders are interconnected.

In this case, the slots are made along the arc sector with an angle of 90 °.

In addition, the cam mechanism is equipped with two discs mounted on an axis parallel to each other, while the rods of the pneumatic cylinders of the piston pneumatic loader are placed in the gap between the disks.

In this case, the power structure is made in the form of a bearing housing, covering pneumatic cylinders and a cam mechanism, and the swinging power lever is located outside the bearing housing and is connected to the cam mechanism disk by an axis passed through the wall of the bearing housing.

The essence of the invention lies in the fact that the increased comfort and reduced likelihood of injury to the user when performing any work, for example when working when you often need to get out of the chair, are achieved by freeing up the space in front of the seat of the chair from any elements protruding outside the chair, including leg supports, for which each of the two means for physical warming up of the legs built into the chair is made in the form of an autonomous module, which includes a supporting body, inside of which a pneumatic loader, and a swinging power arm extending downwardly pivotally mounted pivotally mounted, while the leg support is mounted to move along the swinging power arm, shifting from the worker to the neutral position and fixing it in the indicated positions, and the supporting body is installed in the armrest cavity and fixed in it at the level of the seat of the chair, as a result of which all elements of the means for physical warm-up of the legs are located to the right and left of the seat of the chair, while maintaining the usual For the user, the outlines of the back, seat and armrests. As in the prototype, the presence in the chair of the force control system on the swinging power arm, which includes a receiver connected to the piston pneumatic loaders, mounted under the seat of the chair, provides comfortable conditions for performing physical exercises.

Placing leg supports in the working position on the lower part of the swinging power lever with the orientation of the legs for the right and left legs on the levers towards each other makes it possible to move the leg supports to the position in front of the seat of the chair, which provides the user with comfortable conditions when performing physical exercises, as legs continue to be in the usual position relative to the seat. Moving the supports to the working position and fixing them does not cause difficulties, since the user can perform these operations simply by bending forward without getting up from the chair.

Placing the leg supports in the neutral position on the upper part of the swinging power arm with the orientation of the legs for the right and left legs on the levers parallel to each other and the side edge of the chair seat allows the user to remove the legs in a neutral position without getting up from the chair, just bending forward.

The equipment of the force control system on the swinging power arm with a control valve block located between the receiver and the piston pneumatic loaders and including an input manifold to which both piston pneumatic loaders are connected, an output manifold to which the receiver is connected, an air return valve from the atmosphere, connected to the inlet manifold, a parallel check valve for supplying compressed air to the receiver and a valve-switch modes connecting the inlet and the output manifolds between each other, and a controlled pressure control valve in the receiver, connected to the output manifold, allows the user to freely move the chair around the room and place it anywhere, since air injection into the receiver is provided by the pneumatic loaders themselves, and the choice of pressure in the receiver and , accordingly, the level of physical load on the swinging power levers is performed by the user himself, depending on his sensations, while the ultimate pressure in the receiver and pneumatic loads s can be limited by setting an appropriate volume of the receiver, which prevents operation of the chair with increased effort on the rocking levers of power, preventing accidental injury to the user.

Placing a control valve block on one of its armrests provides comfortable conditions when setting up a force control system on a swinging power arm.

Equipping each armrest with a shutter that covers its cavity from the outside allows you to save the exterior shape of the chair that is familiar to the user.

The proposed design of means for physical warming up of the legs in a sitting position provides a lesser chance of injury to the user, since in any situation with an accidental release of effort, for example, a leg jumps off a support, the swinging power lever cannot move to a neutral position due to the kinematic gear being equipped with a slotted cam mechanism, including at least one disk with two arc slots located diametrically opposite to each other, in each of which a finger is attached, respectively mounted on one of the rods of the pneumatic cylinders, while the disk is fixed on the axis of the power lever so that each slot is placed symmetrically relative to the longitudinal axis of the lever; when the rods are fully extended, both fingers are located at the far wall of the slots. In case of accidental removal of the leg from the support, the piston, moving to its limit position, turns the disk to a position in which both slots will stand symmetrically relative to the longitudinal axis of the piston pneumatic loader, and the power lever will stand perpendicular to the longitudinal axis of the loader, which corresponds to its neutral position. It does not matter which piston of which of the two cylinders will move to the extreme position. The presence of two identical pneumatic cylinders mounted in parallel with each other in a piston pneumatic loader, the pneumatic cavities of which are connected to each other, with the selected kinematic transmission design, makes it possible to obtain lever forces during forward and reverse swings, and each cylinder will operate independently of each other, which ensures the same amount of effort on the lever for forward and reverse swing, and also makes it possible to use the same pneumatic load Atel when it is installed on the right or the left of the seat. The articulation of both pneumatic piston cylinders simplifies the design of the pneumatic loader.

Making slots in the arc sector with an angle of 90 ° provides the most rational range of swing of the power arm.

Equipping the cam mechanism with two discs mounted on an axis parallel to each other, while the piston rod pneumatic cylinder piston rods are located in the gap between the discs, increases the kinematic transmission rigidity and eliminates the appearance of lateral forces in the groove cam mechanism.

The implementation of the power design of the piston pneumatic loader in the form of a bearing housing, covering the pneumatic cylinders and the cam mechanism, with the placement of the swinging power lever outside the bearing housing and connecting it to the cam mechanism disk with an axis passed through the wall of the bearing housing, allows the means for physical leg warming up in the form autonomous module.

Figure 1 shows a General view of the chair when performing physical exercises (a flap that closes the cavity of the left armrest is shifted to the "open" position); figure 2 - General view of the chair in normal operating position; figure 3 is a pneumatic diagram of a control system of effort on a swinging power arm; figure 4 and 5 is a structural diagram of a means for physical warm-up legs in two projections.

The chair (XR-Chair, XRS-Chair or FUCHAIR) contains a base 1 on which the power frame is fixed 2. The chair has a seat 3, a back 4 with a headrest 5, right 6 and left 7 armrests. The chair has a built-in system for performing physical exercises in the sitting position, equipped with two means for physical warming up of the legs, each of which has a supporting body 8 with a piston pneumatic loader 9 located inside it and a swinging power arm 10, which is pivotally mounted on the body 8, and has a downward swinging power arm with it mounted prop 11 for the foot. The housing 8 and the swinging power levers 10 are placed on both sides relative to the seat 3 of the chair. Each housing 8 is placed in the cavity of one of the armrests and is fixed in it at the seat level of the chair, and the swinging power lever 10 is placed on the outside of the housing.

The leg support 11 is mounted movably relative to the swinging power arm 10 with the possibility of shifting from the position for performing the physical exercises shown in FIG. 1 to the neutral position shown in FIG. 2, with its fixation in the indicated positions. In the position for performing physical exercises, the leg support 11 is mounted on the lower part of the swinging power lever 10, while the supports 11 for the right and left legs are mounted on the levers towards each other. In the neutral position, the leg support is mounted on the top of the swinging power arm 10 parallel to the side edge of the chair seat, while the supports for the right and left legs are parallel to each other.

Each armrest is equipped with a sash 12, covering its cavity from the outside. The sash is suspended from the armrest using any known design.

The seat has a force control system on the swinging power arm, equipped with a receiver 13 connected to the piston pneumatic loaders 9 through a control valve block 14, which includes an input manifold 15, to which both the loaders 9 are connected, an output manifold 16, to which the receiver 13 is connected, check valve 17 for air intake from the atmosphere, connected to the inlet manifold 15, parallel installed check valve 18 for supplying compressed air to the receiver 13 and the valve switch 19 modes connecting the input 15 and output 16 collectors between themselves, and a controlled valve 20 for monitoring pressure in the receiver connected to the output manifold 16. At the output of the controlled valve 20 for controlling pressure in the receiver, a noise muffler 21 is installed. The receiver 13 is installed under the seat 3. The control valve block 14 is placed on one of the armrests of the chair, for example on the right armrest 6.

As the valve switch 19 modes can be used with any locking device having two positions: "open" and "closed". As the controlled valve 20, any pressure regulator in front of itself can be used.

Means for the physical warm-up of legs in a sitting position, located on the right and left sides of the seat, are made of the same type and only one of them is described below. Each of these means contains a bearing housing 8, inside of which is placed a piston pneumatic loader 9, having two pneumatic piston cylinders 22 and 23, and a swinging power arm 10 kinematically connected with the piston pneumatic loader 9. The cylinders are mounted parallel to each other and made identical. A piston 24 is installed in the cylinder 22 with a rod 25 protruding beyond the cylinder. A piston 26 is installed in the cylinder 23 with the rod 27 protruding beyond the cylinder. The pneumatic cavities 28 and 29 of the cylinders are connected by a flexible pipe 30 and have a common outlet pipe 31 connecting them to the input manifold 15. The rod cavity of each cylinder is connected to the atmosphere by any known method (drainage hole, lack of stem seal, etc., not shown in the drawing). Both piston cylinders are pivotally mounted on the end wall 32 of the housing 8. The oscillating power lever 10 is located outside the housing 8 and is rigidly fixed on the axis 33, passed through the side wall of the housing. The axis 33 passes between the rods 25 and 27 and is connected with them by a kinematic transmission equipped with a groove cam mechanism, including two parallel disks 34, in each of which two arc slots 35 and 36 are made, which are diametrically opposed to each other. The slots are made along the arc sector with an angle of 90 °. The disks 34 are mounted on the axis 33 of the swinging power lever 10 so that each slot is placed symmetrically with respect to the longitudinal axis of the lever 10. The rods 25 and 27 of the piston cylinders of the loader 9 are placed in the gap between the disks 34. The fingers 37 and 38 are placed in the slots 35 and 36, fixed respectively, on the rods 25 and 27 of the piston cylinders. When the rods 25 and 27 are fully extended, both fingers are located at the far wall of the slots 35 and 36. The housing 8 covers the piston cylinders 22 and 23 and the cam discs 34.

The leg support 11 is equipped with a sleeve 39 movable relative to the power lever 10. A groove 40 is made on the inner surface of the sleeve, in which a wedge holder 41 with a tongue 42 is mounted. An elastic ring 43 is installed at the end of the power lever, preventing the support 11 from being displaced beyond the power lever.

In the normal working position of the chair, when the user performs routine work, for example, on a computer or watching TV, the leg supports 11 are in the upper position, are parallel to the side edge of the chair seat and do not interfere with the user, who can freely get up, sit down and place his legs as he wants to. For the period of physical exercises (physical warm-up of the legs), the user opens the sash 12, removes the latch 41, moves one or both supports 11 to the lower position, turns each of them 270 ° and fixes them in this position. Moving can be carried out by the user without leaving the chair.

The user, sitting in a chair, adjusts the controlled valve 20 to the pressure corresponding to the required effort, sets the valve switch 19 to the "closed" position and begins to work with means for performing physical exercises with legs. With the simultaneous swaying of both power levers 10, both pneumatic loaders 9 will work to pump air into the receiver 13, and both loaders work the same. After the previous physical warm-up, the pneumatic system will always retain some residual pressure, under the influence of which the pistons 24 and 26 are displaced to the extreme position, as shown in Fig. 4. The fingers 37 and 38 are located at the far wall of the grooves 35 and 36. The power lever 10 can swing back and forth within 90 °. When the power lever 10 is shifted forward, the disks 34 of the grooved cam mechanism are rotated forward. The finger 37 moves along an arc of a circle and moves the piston 24 forward, compressing the air in the cavity 28 of the piston cylinder 22. The piston 26 remains in the final position, as the slot 36 is able to move freely relative to the finger 38. Compressed air is pumped through the check valve 18 into the receiver 13 . With the reverse movement of the power lever 10, the piston 26 continues to remain in the final position, and the piston 24 under the action of compressed air in the cavity 29 begins to shift in the opposite direction until the pressure in the cavities 28 and 29 is equal to atmospheric, and the piston 24 stops at a certain intermediate position. The power lever 10 continues to move, and the disks 34 rotate with it until the front end wall of the groove 35 comes into contact with the finger 37. With the further movement of the power lever 10, the finger 37 moves together with the disks 34 and moves the piston 24. The pressure in the cavities 28 and 29 falls and through the check valve 17 a new portion of atmospheric air is sucked in. The air injection continues until the controlled valve 20 controls the pressure in the receiver and the physical exercises with the nominal force on the swinging power levers 10 can begin. The valve switch 19 modes is put into the "open" position and the pressure in the receiver 13 and piston pneumatic loaders 9 is leveled. Pistons 24 and 26 in both pneumatic loaders move to the extreme position shown in FIG. 4. When swinging the power lever 10 relative to the neutral position, one of the pistons will always move, reducing the volume of the air cavity in its cylinder. Moreover, in the adjacent cylinder parallel to it during the entire cycle of this swing, the air cavity will have a maximum volume and, taking into account the volume of the receiver 13, the piston displacement will not lead to a significant change in pressure in the pneumatic loaders, keeping the force on the swinging power levers 10 unchanged, regardless of whether whether simultaneous or alternating leg movements. At the end of the physical warm-up, the swinging power arms 10 will always be in a neutral position. The user releases the latch, turns the leg support 11 to 270 °, moves it up to the neutral position and fixes it in this position. Then the user closes the sash 12, returning the chair to the usual working appearance. There are no obstacles to the performance of routine work.

At the request of the user, the chair can be equipped with inflatable pillows with connecting them to the receiver through the valve block, as shown in PCT application WO 01/040012.

The proposed chair can be manufactured industrially using modern materials and technologies. When implementing the invention, various designs of stoppers, airbags and other elements of the chair can be used, different from those described in this application and shown in the drawings illustrating the invention, without departing from the essence and scope of the present invention defined by the scope of the claims set forth in the claims.

Claims (10)

1. An office or home chair containing a base, a seat, a backrest, built-in means of physical warming up of the legs, each of which includes a piston pneumatic loader and a swinging power arm kinematically connected with the loader with foot support, and a force control system on the power arm including with loaders, a receiver located under the seat, characterized in that each means for the physical warm-up of the legs is made in the form of an autonomous module including a housing, inside of which there is a piston eva pneumatic loader, and a swinging power lever pointing downward pivotally mounted on the outside, while the leg supports are mounted to move along the lever with shifting from the worker to the neutral position and fixing in these positions, and the module case is located in the armrest cavity at the seat level armchairs. 2. The chair according to claim 1, characterized in that in the working position the leg supports are mounted on the bottom of the power levers towards one another. 3. The chair according to claim 1, characterized in that in the neutral position the leg supports are located on top of the power levers parallel to one another and the side edge of the seat. 4. The chair according to claim 1, characterized in that the control system of the effort on the levers is equipped with a control valve block located between the receiver and pneumatic loaders, including an input manifold connected to the loaders, an output manifold connected to the receiver, an air return valve from the atmosphere connected to the inlet manifold, a parallel check valve for supplying compressed air to the receiver and a valve - a mode switch connecting the inlet and outlet manifolds and a controlled valve con pressure monitoring in the receiver, connected to the output manifold. 5. The chair according to claim 4, characterized in that the control valve block is located in one of the armrests. 6. The chair according to claim 1, characterized in that each armrest is equipped with a sash covering its cavity from the outside. 7. Means for physical leg warm-up in a sitting position, comprising a power structure on which a pneumatic loader with a piston cylinder is fixed, a swinging power lever with leg supports and a kinematic transmission connecting the lever with the piston rod, characterized in that the piston pneumatic loader is equipped the second piston cylinder, similar to the first, placed parallel to it, both cylinders are pivotally mounted on the power structure, and their pneumatic cavities are interconnected, kin the mating gear is equipped with a cam mechanism, including at least one disk with two arcuate slots located diametrically opposite to each other, each of which has a finger attached to the rod of the pneumatic cylinder, while the disk is mounted on the axis of the power lever so that each slot is placed symmetrically relative to the longitudinal axis of the lever, and when the rods are fully extended, both fingers are located at the far wall of the slots. 8. The tool according to claim 7, characterized in that the slots are made along an arc of a sector with an angle of 90 °. 9. The tool according to claim 7, characterized in that the cam mechanism is equipped with two disks mounted on an axis parallel to each other, while the rods of the pneumatic cylinders are placed in the gap between the disks. 10. The tool according to claim 7, characterized in that the power structure includes a housing covering the pneumatic cylinders and the cam mechanism, and the power lever is placed on the housing and connected to the mechanism disk by an axis passing through the wall of the housing.

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