EP1219277A1 - Orthopaedic chair - Google Patents
Orthopaedic chair Download PDFInfo
- Publication number
- EP1219277A1 EP1219277A1 EP01870001A EP01870001A EP1219277A1 EP 1219277 A1 EP1219277 A1 EP 1219277A1 EP 01870001 A EP01870001 A EP 01870001A EP 01870001 A EP01870001 A EP 01870001A EP 1219277 A1 EP1219277 A1 EP 1219277A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- user
- rotatable unit
- footrest
- lap restraint
- seat
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61H—PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
- A61H1/00—Apparatus for passive exercising; Vibrating apparatus ; Chiropractic devices, e.g. body impacting devices, external devices for briefly extending or aligning unbroken bones
- A61H1/02—Stretching or bending or torsioning apparatus for exercising
- A61H1/0218—Drawing-out devices
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61H—PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
- A61H2201/00—Characteristics of apparatus not provided for in the preceding codes
- A61H2201/16—Physical interface with patient
- A61H2201/1602—Physical interface with patient kind of interface, e.g. head rest, knee support or lumbar support
- A61H2201/1628—Pelvis
- A61H2201/163—Pelvis holding means therefor
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61H—PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
- A61H2201/00—Characteristics of apparatus not provided for in the preceding codes
- A61H2201/16—Physical interface with patient
- A61H2201/1602—Physical interface with patient kind of interface, e.g. head rest, knee support or lumbar support
- A61H2201/164—Feet or leg, e.g. pedal
- A61H2201/1642—Holding means therefor
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61H—PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
- A61H2203/00—Additional characteristics concerning the patient
- A61H2203/04—Position of the patient
- A61H2203/0425—Sitting on the buttocks
- A61H2203/0431—Sitting on the buttocks in 90°/90°-position, like on a chair
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61H—PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
- A61H2203/00—Additional characteristics concerning the patient
- A61H2203/04—Position of the patient
- A61H2203/0481—Hanging
- A61H2203/0493—Hanging by hanging the patient upside down or inclined downwardly
Abstract
Description
- The present invention relates to an orthopaedic chair for stretching the back of a user according to the preamble of the first claim.
- An orthopaedic chair for stretching the back of a user is for example known from WO-A-97/27904. This document discloses an orthopaedic chair comprising a stand on which a rotatable unit for seating a user is mounted. The rotatable unit is rotatable about a horizontal axis from an upright position to an inverted position, in which the user is turned upside down. The rotatable unit comprises a seat and a backrest for supporting the bottom and the back of the user. The seat and backrest are rigidly connected to each other. Below the seat, a pair of cushion rolls is provided on either side of a bar which extends from the middle of the bottom side of the seat. The cushion rolls are provided for engaging the ankles of the user, with the purpose of holding the legs of the user in position. The rotatable unit further comprises a removable lap restraint which is provided to rest over the upper thighs and lap area of the user and to be tightened over the thighs of the user to secure the user to the seat and prevent him from falling out of the chair when the rotatable unit is rotated to the inverted position.
- The orthopaedic chair disclosed in WO-A-97/27904 however has the disadvantage that in the inverted position the weight of the user causes him to hang not only on his thighs, which are secured to the seat by the lap restraint, but also on his ankles, which are engaged by the cushion rolls. This can lead to pressure on the ankles and can cause pain and bruises on the ankles.
- It is an aim of the present invention to provide an orthopaedic chair for stretching the back of a user with which pressure on the ankles of the user can be avoided.
- This aim is achieved according to the invention with an orthopaedic chair having the technical characteristics of the characterising part of the first claim.
- In the orthopaedic chair according to the invention, the rotatable unit comprises means for applying a force to the soles of the user's feet in the direction of the lap restraint. By applying this force in the direction of the lap restraint, the user's knees are pressed onto the lap restraint and the user's lower legs become clamped between the lap restraint and the force applying means. As a result, the user's lower legs are maintained in their position relative to the rotatable unit when rotated from the upright position to the inverted position. By providing the force applying means which engage the soles of the user's feet, it can be achieved that the user hangs only on his upper legs when in the inverted position, and the occurrence of pressure on the user's ankles can be minimised.
- By providing the means for applying a force to the soles of the user's feet, the provision of cushion rolls or other means to engage the user's ankles can be avoided. This is advantageous as the taking place of the user in the chair can be facilitated. The force applying means in the orthopaedic chair of the invention are provided to engage the soles of the user's feet and as such can be located lower on the chair than the cushion rolls or other means, thus forming less of a hindrance.
- The force applying means preferably comprise a footrest provided to engage the soles of the user's feet and moving means for moving the footrest from an open position to a clamping position. It is also possible to provide moving means which are provided to move the footrest between the open position and the clamping position, i.e. from the open position to the clamping position and back. With the footrest in the open position, the user's lower legs are loosely accommodated between the footrest and the lap restraint. With the footrest in the clamping position, the user's knees are pressed onto the lap restraint, so that the user's lower legs are clamped between the footrest and the lap restraint. The footrest provides an enlarged contact area between the force applying means and the soles of the user's feet. This has the advantage that the pressure exerted on the soles of the user's feet is spread over the whole of the contact area between the footrest and the soles of the user's feet, avoiding a large pressure on a small area of the soles of the user's feet. The movability of the footrest between the open position and the clamping position has the advantage, that the user can more easily sit himself in the chair before he is secured to the rotatable unit and rotated to the inverted position.
- The moving means for moving the footrest from the open position to the clamping position preferably comprise a pivotable lever on the rotatable unit which is provided to pivot about a substantially horizontal pivot axis extending transversally of the rotatable unit, and drive means for pivoting the lever. The pivotable lever preferably has a front end in front of the pivot axis onto which the footrest is mounted. The drive means are preferably connected to a rear end of the lever, which is located behind the pivot axis. In this way, the movement of the footrest from the open position to the clamping position, which is mainly directed in upward direction, can be obtained by a pivoting action of the lever. This pivoting action of the lever can easily be achieved by the drive means moving the rear end of the lever in a mainly downward direction. So providing the lever with associated drive means can provide a simple construction for the means for applying a force to the soles of the user's feet.
- The drive means for pivoting the pivotable lever preferably comprise a blockable gas spring which is mounted between the rear end of the lever and a bottom side of the seat. The drive means for pivoting the pivotable lever may however also comprise any other drive means known to the person skilled in the art. With the use of the gas spring as drive means for pivoting the lever and moving the footrest, it is possible to adjust the position of the footrest in which it exerts the most suitable clamping force onto the soles of the user's feet to the length of the user's lower legs.
- Due to the blockability of the gas spring by means of the valve, the movement of the piston rod out of the cylinder can be interrupted at any time by closing the valve. In this way, the user can decide himself how much clamping force is applied to his lower legs, as he can adjust the position of the footrest before the gas spring is blocked by the closing of the valve. This has the advantage that the user can adjust the amount of clamping force needed to maintain his lower legs in position to the amount he thinks is suitable. The blockability of the gas spring further has the advantage that the footrest can be held in the open position, i.e. the lowest position with respect to the seat with the rotatable unit in the upright position, to facilitate the taking place of the user in the chair.
- In the orthopaedic chair of the invention, the lap restraint is preferably movable between a lifted position, in which the user's upper legs are loosely accommodated between the lap restraint and the seat, and a securing position, in which the user's upper legs are clamped between the lap restraint and the seat, thereby securing the user to the seat. The movement of the lap restraint from the lifted position to the securing position can be achieved by moving means which are operable independently from the moving means for moving the footrest, but in a preferred embodiment of the invention, the lap restraint is connected to the moving means for moving the footrest in such a way that the lap restraint is moved from the lifted position to the securing position upon movement of the footrest from the open position to the clamping position. In this way, it is achieved that the lap restraint is moved from the lifted position to the securing position by the moving means together with the footrest being moved from the open position to the clamping position. This embodiment has the advantage that, upon operating the moving means, the user is secured to the seat together with the clamping of the user's lower legs. In a normal procedure, the user will be secured to the seat before he is rotated to the inverted position. So with this embodiment, it can be prevented that the user is secured to the seat and rotated to the inverted position without the user's lower legs being clamped between the lap restraint and the footrest, which may lead to difficulties for the user in maintaining his lower legs in their position with respect to the rotatable unit. So by coupling the lap restraint to the footrest in the manner described above, it can be ensured that the user's lower legs are clamped between the footrest and the lap restraint before the user is rotated to the inverted position.
- In a preferred embodiment of the orthopaedic chair of the invention, the distance between the footrest and the seat is adjustable. In this way the distance between the footrest and the seat, and thus also between the footrest and the lap restraint, can be adapted to the length of the user's lower legs, or in other words to the user's height. This has the advantage that the clamping force for maintaining the user's lower legs can be further optimised. The adjustability of the distance between the footrest and the seat can for example be obtained by mounting the pivotable lever, onto which the footrest is mounted, in a slidable bearing on the rotatable unit. The adjustability can however also be obtained by making the seat adjustable in height, or in any other way known to the person skilled in the art.
- The orthopaedic chair according to the invention is preferably provided with drive means for rotating the rotatable unit between the upright position and the inverted position. These drive means may comprise mechanical drive means, such as for example gear wheels which are operable by means of a handle, electric drive means, such as for example an electric motor, or any other drive means known to the person skilled in the art.
- The orthopaedic chair of the invention is preferably further provided with stopping means for stopping the rotation of the rotatable unit in any intermediate position between the upright position and the inverted position. By means of the stopping means, the user can stop the rotation of the rotatable unit in any intermediate position, i.e. with the direction of the backrest in any angle with respect to the horizontal plane, if he feels the inverted position to be uncomfortable, or if he does not wish to be rotated to the inverted position in one go. By releasing the stopping means the rotatable unit can be further rotated towards the inverted position.
- The orthopaedic chair of the invention is preferably further provided with limiting means for limiting the maximum angle over which the rotatable unit can be rotated. These limiting means allow the user to select a maximum rotation before rotating the rotatable unit. This has the advantage that the user can prevent himself to be rotated beyond a maximum position, which he can select in advance.
- The invention will be further elucidated by means of the following description and the appended figures.
- Figure 1 shows a preferred embodiment of the orthopaedic chair of the invention.
- Figure 2 shows a user being seated in the orthopaedic chair of figure 1, with the footrest in the open position and the lap restraint in the lifted position.
- Figure 3 shows the embodiment of figure 2, with the footrest in the clamping position and the lap restraint in the securing position.
- Figure 4 shows the embodiment of figure 2, with the rotatable unit rotated to the inverted position.
- Figure 5 shows a cross-sectional view of the preferred embodiment of figure 1, showing the drive means for rotating the rotatable unit and the mounting of the lap restraint on the rotatable unit in greater detail.
- Figures 6a and b show a second embodiment of the orthopaedic chair of the invention, respectively in the upright position and in the inverted position.
- The orthopaedic chair shown in figure 1 comprises a
rotatable unit 1 which is mounted on astand 2. Therotatable unit 1 is rotatable about a substantiallyhorizontal axis 22 between an upright position (shown in figures 1 and 2) and an inverted position (shown in figure 4). Therotatable unit 1 comprises aseat 3 for supporting the bottom of a user and abackrest 4 for supporting the back of the user. Therotatable unit 1 is provided with alap restraint 5 for securing the user to theseat 3 and means 6, 7, 8 for applying a force to the soles of the user's feet in the direction of thelap restraint 5. - The
seat 3 and thebackrest 4 are preferably rigidly connected to each other and enclose an angle α. This angle α is preferably about 90°, but may also be more or less than 90°. Theseat 3 and thebackrest 4 may also be movably connected to each other, the angle α being adjustable to the preferences of the user. Thebackrest 4 is preferably substantially straight over its entire length, but may also be curved or angled or have any other shape known to the person skilled in the art. - The
seat 3 may be fixed or adjustable in height. With aseat 3 which is adjustable in height it is achieved that the centre of gravity of therotatable unit 1 and a user therein can be adjusted to an optimal position in which the force required for rotation to the inverted position is minimal. The adjustablity of theseat 3 in height can for example be achieved by mounting it in a slidable mounting (not shown) on therotatable unit 1, the slidable mounting being such that the seat can be lowered or raised with respect to therotation axis 22 and that the seat can be fixed in height by means of screws or any other means known to the person skilled in the art. - In the embodiment shown in figure 1, the
means footrest 6 and movingmeans footrest 6. Thefootrest 6 is provided to engage the soles of the user's feet. The moving means 7, 8 are provided to move thefootrest 6 from an open position (shown in figures 1 and 2), in which the user's lower legs are loosely accommodated between thefootrest 6 and thelap restraint 5, to a clamping position (shown in figure 3), in which the user's lower legs are clamped between thefootrest 6 and thelap restraint 5. Theforce applying means - In the embodiment shown in figure 1, the moving
means pivotable lever 7 on therotatable unit 1 and drive means 8 for pivoting thepivotable lever 7. Thepivotable lever 7 is provided to pivot about a substantially horizontal pivot axis 9 extending transversally of therotatable unit 1. Thepivotable lever 7 is located below the seat 3 (when therotatable unit 1 is in the upright position) and has afront end 10, onto which thefootrest 6 is mounted, in front of the pivot axis 9 and arear end 11 behind the pivot axis 9. The drive means 8 for pivoting thelever 7 are connected to therear end 11 of thepivotable lever 7. In this way, thefootrest 6 is moved in generally upward direction towards the lap restraint when the drive means 8 move therear end 11 of thelever 7 in generally downward direction. The moving means 7, 8 for moving thefootrest 6 may however also comprise any other moving means known to the person skilled in the art. - The drive means 8 for pivoting the
lever 7 preferably comprise agas spring 8, which is preferably mounted between therear end 11 of thelever 7 and the bottom side of theseat 3. Such agas spring 8 is known in the art and will not be described here in great detail. It comprises apiston rod 12 which is slidably mounted in acylinder 13. The force for sliding thepiston rod 12 out of the cylinder is obtained by a pressurised gas inside the cylinder. Due to the mounting of thegas spring 8 between therear end 11 of thelever 7 and the bottom side of theseat 3, thefootrest 6 is moved from the open position towards the clamping position when thepiston rod 12 is forced out of thecylinder 13 by the pressurised gas. The drive means 8 for pivoting thelever 7 may however also comprise any other drive means 8 known to the person skilled in the art, such as for example a spring or a torsion spring. - The
gas spring 8 used as drive means for pivoting thelever 7 is preferably ablockable gas spring 8. This means that thegas spring 8 is provided with a closable valve (not shown), by means of which the movement of thepiston rod 12 in and out of thecylinder 13 can be interrupted. When the valve is opened, thepiston rod 12 is moved out of the cylinder by means of expansion of a pressurised gas inside thecylinder 13, or thepiston rod 12 can be pushed into thecylinder 13 by means of an external force, thereby compressing the gas inside thecylinder 13. When the valve is closed, the position of thepiston rod 12 relative to thecylinder 13 is maintained. - With the use of the
blockable gas spring 8 as drive means for pivoting thelever 7 and thus moving thefootrest 6, it can be achieved that a suitable force for clamping the user's lower legs is applied to the soles of the user's feet. This means that the force applied is not too large, which could hurt the user's lower legs, and not too small, which could cause the user difficulty to maintain his lower legs in position when in the inverted position. This can be achieved as, when the valve of thegas spring 8 is opened, the piston rod will be moved out of the cylinder by the compressed gas until the force exerted by thegas spring 8 on therear end 11 of thelever 7 is in balance with the force exerted by the user's feet on thefront end 10 of thelever 7. The latter force is a reaction force caused by the clamping of the user's lower legs between thelap restraint 5 and thefootrest 6. So when a suitable pressure is chosen for the compressed gas of the gas spring, it can be achieved that a suitable clamping force is exerted on the user's lower legs, i.e. a clamping force not too large and not too small. - It is obvious that the distance over which the
footrest 6 and thus also thepiston rod 12 is moved before the force balance mentioned in the former paragraph is reached depends on the length of the user's lower legs. As the movement of thepiston rod 12 continues until this force balance is reached, it can be achieved that the most suitable position for the footrest to apply the most suitable clamping force is adjusted to the length of the user's lower legs. So providing thegas spring 8 as drive means has the advantage that the orthopaedic chair of the invention is adapted to accommodate users having different heights. - The
blockable gas spring 8 is preferably operable by the user by means of a first handle (not shown) which is mounted on therotatable unit 1 and connected to thegas spring 8 by means of a cable. The first handle is preferably mounted on therotatable unit 1 within reach of the user's left or right hand, so that the user can operate the gas spring, i.e. open the valve, by pressing the first handle. Thegas spring 8 may however also be operated in any other way known to the person skilled in the art. - The
lap restraint 5 is preferably in such a way mounted on therotatable unit 1 that the user can easily move into and out of therotatable unit 1, without being hindered by thelap restraint 5. This can be achieved by providing a removably mounted lap restraint, so that the user can remove thelap restraint 5 to get into or out of the chair. Alternatively, this can be achieved by providing a lap restraint with a first lateral side releasably mounted on therotatable unit 1 and a second lateral side rotatably mounted on the rotatable unit about its longitudinal axis, so that the user can pivot thelap restraint 5 upwardly towards one lateral side to get into or out of the chair. Preventing the hindering of thelap restraint 5 can also be achieved in any other way known to the person skilled in the art. - In the embodiment shown in figure 1, the
lap restraint 5 is movably mounted on the rotatable unit between a lifted position (shown in figures 1 and 2) in which the user's upper legs are loosely accommodated between thelap restraint 5 and theseat 3, and a securing position (shown in figure 3) in which the user's upper legs are clamped between thelap restraint 5 and theseat 3. Thelap restraint 5 can be movable independently from thefootrest 6, but in the embodiment shown in figure 1, thelap restraint 5 is in such a way connected to the moving means 7, 8 that thelap restraint 5 is moved from the lifted position to the securing position upon movement of thefootrest 6 from the open position to the clamping position. - In the embodiment shown in figure 1 and in greater detail in figure 5, this is preferably achieved in the following way. The
lap restraint 5 is mounted on therotatable unit 1 in such a way that it is pivotable about a substantiallyhorizontal pivot axis 14 extending in transverse direction of the chair. On lateral sides of therotatable unit 1, thelap restraint 5 is connected to thelever 7 by means of connector bars 15. Each of these connector bars 15 has afirst end 16 connected to thelap restraint 5 in front of itspivot axis 14, and asecond end 17 connected to thelever 7 between itsrear end 11 and its pivot axis 9. In this way, when the drive means 8 move therear end 11 of the lever 9 in generally downward direction, the second ends 17 of the connector bars 15 are also moved in downward direction, so that the connector bars 15 pull thelap restraint 5 in downward direction towards theseat 3. So, as a result of a downward movement of therear end 11 of thelever 7, thefootrest 6 is moved in upward direction and thelap restraint 5 is moved in downward direction. In other words, a downward movement of therear end 11 of the lever causes thelap restraint 5 and thefootrest 6 to move towards each other. The movability of thelap restraint 5 together with thefootrest 6 may however also be achieved in any other way known to the person skilled in the art. - The
pivotable lever 7 can be fixed or adjustable in height. With apivotable lever 7 which is adjustable in height, the distance between thefootrest 6 and thelap restraint 5 can be adjusted to the length of the user's lower legs. In this way, the clamping force can be optimised for each user. In the embodiment shown in figure 1, the adjustability of thelever 7 in height is achieved by providing it with a slidable mounting 18 and by making the connector bars 15 adjustable in length. In this way, thelever 7 can be raised or lowered with respect to thelap restraint 5, while the position of thelap restraint 5 can be maintained by adjusting the length of the connector bars 15. The slidable mounting 18 of thelever 7 can be fixed by means of screws or any other fixing means known to the person skilled in the art. The adjustability of thelever 7 in height may however also be achieved in any other way known to the person skilled in the art. - In the embodiment of figure 1, the
lever 7 is preferably provided with a number of fixingpoints 19 for the second ends 17 of the connector bars 15. In figure 1, thelever 7 is provided with three fixingpoints 19, but it may also be provided with more or less fixing points 19. By proving a number of fixingpoints 19, the second ends 17 of the connector bars can be fixed closer to or further from therear end 11 of thelever 7, to which thegas spring 8 is connected. When the second ends 17 of the connector bars 15 are fixed closer to therear end 11 of thelever 7, i.e. further from the pivot axis 9 of thelever 7, the second ends 17 of the connector bars 15 and hence thelap restraint 5 will be moved a greater distance upon movement of thepiston rod 12 of thegas spring 8. When the second ends 17 of the connector bars 15 are fixed further from therear end 11 of thelever 7, i.e. closer to the pivot axis 9 of thelever 7, the second ends 17 of the connector bars 15 and hence thelap restraint 5 will be moved a smaller distance upon movement of thepiston rod 12 of thegas spring 8. In this way, the movement of thelap restraint 5 can be adjusted to the amount needed for achieving enough securing force for securing the user to theseat 3. In other words, providing the number of fixingpoints 19 has the advantage that the securing position of thelap restraint 5 can be adjusted to each user. - In the embodiment shown in figure 1, the rotatable unit preferably comprises a
main frame 20 to provide a simple mounting structure for all the parts of therotatable unit 1. Themain frame 20 preferably comprises twolateral bars 21 extending over substantially the entire height of therotatable unit 1. On top the lateral bars 21 are preferably connected by means of a top bar (not shown). Optionally, the lateral bars 21 may also be connected below by means of a bottom bar (not shown). The lateral bars 21 are rotatably mounted on thestand 2. They are provided to rotate about a substantiallyhorizontal rotation axis 22 extending in transversal direction of the chair. Thebackrest 4 and theseat 3 are mounted on theframe 20 in such a way that they are located behind the plane of theframe 20, with the top end of thebackrest 4 connected to the top bar and the front end of the seat connected to the lateral bars 21 below therotation axis 22. Thepivotable lever 7 is mounted on the lower part of theframe 20. As the frame extends over substantially the entire height of the rotatable unit, theframe 20 forms a rigid mounting structure for all the parts of therotatable unit 1. The rotatable unit may however comprise any other mounting structure known to the person skilled in the art. - As shown in figure 5, the lap restraint is preferably mounted in such a way on the
rotatable unit 1 that itspivot axis 14 is located behind theframe 20. In order to be removable, thelap restraint 5 preferably comprises aremovable member 26 which is slidable into and out of holding bars 27. The holding bars 27 extend from thepivot axis 14 towards the front of the chair. - The orthopaedic chair of the invention preferably comprises drive means 23, 24, 25 for rotating the
rotatable unit 1 between the upright position and the inverted position. These drive means are preferably operable by the user. In the embodiment shown in figure 1 and in greater detail in figure 4, the drive means comprise alarge gear wheel 23 which is rigidly mounted on thestand 2 and asmall gear wheel 24 which is provided to run along the circumference of thelarge gear wheel 23 and which is connected to therotatable unit 1. The centre of thelarge gear wheel 23 corresponds to therotation axis 22 of therotatable unit 1. Figure 5 clearly shows that therotation axis 22 is preferably located slightly in front of theframe 20, so that the centre of gravity of the rotatable unit and the user is located behind therotation axis 22, which can facilitate the rotation of the rotatable unit. The drive means further comprise alever 25 which is rigidly connected to thesmall gear wheel 24. By means of thelever 25, the user can rotate thesmall gear wheel 24 along the circumference of thelarge gear wheel 23, thereby rotating therotatable unit 1 between the upright position and the inverted position. As thegear wheel 23 is larger than thegear wheel 24 which can be operated by the user, the user has to apply less force to the lever to rotate therotatable unit 1 than would be the case if thegear wheels gear wheels lever 25, also a motor or any other drive means known to the person skilled in the art may be used in the orthopaedic chair of the invention. - The
gear wheels lever 25 are preferably located on a lateral side of the chair other than that on which the first handle for operating thegas spring 8 is located. This has the advantage that the user can operate the first handle with one hand and thelever 25 with the other hand. Thegear wheels lever 25 are preferably located on the right hand side and the first handle on the left hand side. They may however also be located on the same lateral side of the chair, either left or right. - The orthopaedic chair of the invention is preferably provided with stopping
means gas spring 8. This has the advantage that the user can operate the second handle with one hand and thereby release the stopping means, allowing the rotation of therotatable unit 1, while using his other hand to operate thelever 25 and rotate therotatable unit 1 to the inverted position. The second handle may however also be mounted on any other location of the orthopaedic chair which is deemed suitable by the person skilled in the art. - In the embodiment shown in figure 5, the stopping means comprise a
liftable member 28 which is provided to mesh with thelarge gear wheel 23 and which is provided to be lifted from the circumference of thelarge gear wheel 23 upon operation of the second handle (not shown). The stopping means further comprise aspring 29 for exerting a force onto theliftable member 28 in the direction of the circumference of thelarge gear wheel 23.Stops 30 are preferably provided to prevent theliftable member 28 from being lifted too far from the circumference of thelarge gear wheel 23. - The orthopaedic chair of the invention preferably further comprises limiting
means 31 for limiting the rotation of therotatable unit 1 to a maximum rotation angle. By means of the limiting means 31 the user can select a maximum rotation angle in advance, i.e. before rotating the rotatable unit to the inverted position. In other words, the user can adjust the inverted position to his preferences by means of the limiting means. In the embodiment shown in figure 5, the limiting means compriseholes 31 which are provided in thelarge gear wheel 23, slightly inwardly from the circumference of thelarge gear wheel 23. The limiting means further comprise a pin (not shown) which is insertable into either one of theholes 31 for selecting the maximum rotation angle of therotatable unit 1. When the pin is located in one of the holes, it protrudes from the side of thelarge gear wheel 23, so that the rotation is limited to the position in which the mountingplate 32, onto which thesmall gear wheel 24 and the stopping means 28, 29, 30 are mounted, contacts the pin. Hence, the maximum rotation angle of therotatable unit 1 can be selected in advance by inserting the pin into one of theholes 31. The limiting means for limiting the rotation of the rotatable unit may however also comprise any limiting means known to the person skilled in the art. - The orthopaedic chair of the invention preferably further comprises a
stop 33 for stopping therotatable unit 1 when it is rotated back to the upright position. By providing thestop 33, it can be prevented that therotatable unit 1 is rotated beyond the upright position. In the embodiment shown in figure 1, thisstop 33 is constructed as abar 33 on thestand 2 extending mainly in transverse direction of the chair. When in the upright position, theframe 20 contacts thisbar 33. By providing thisbar 33 it can be prevented that therotatable unit 1 is rotated further back, which could lead to theframe 20 coming into contact with the floor underneath the stand and could lead to damaging of the floor or theframe 20. Thestop 33 can also be constructed in any other way known to the person skilled in the art. - The orthopaedic chair of figure 1 is operated as follows. First, with the
rotatable unit 1 in the upright position (shown in figures 1 and 2), the user selects a preferred inverted position by inserting the pin into one of theholes 31 in thelarge gear wheel 23. Thelap restraint 5 is removed, allowing the user to easily take place in the chair. Then, thelap restraint 5 is put in position over the upper legs of the user. Next, the user operates the first handle (not shown), by which the valve of the gas spring is opened and thepiston rod 12 moves out of thecylinder 13. This movement of the piston rod causes the footrest to be moved from the open position (figures 1 and 2) to the clamping position (figure 3). Due to the provision of the connector bars 15, thelap restraint 5 is at the same time moved from the lifted position (figures 1 and 2) to the securing position (figure 3). The user then releases the first handle, so that the valve is closed and thefootrest 6 and thelap restraint 5 are locked in their respective positions. The user is now secured to theseat 3 and the user's lower legs are now clamped between thelap restraint 5 and thefootrest 6. Next, the user operates the second handle (not shown) with one hand to release theliftable member 28 of the stopping means from the circumference of thelarge gear wheel 23, thereby allowing the rotation of the rotatable unit. Without releasing the second handle, the user can now rotate himself to the inverted position (figure 4) by rotating thelever 25 with his other hand. The user can at any time stop the rotation by releasing the second handle, so that theliftable member 28 is pressed by thespring 29 against the circumference of thelarge gear wheel 23. In any case, the user can keep rotating therotatable unit 1 until the mountingplate 32, onto which thesmall gear wheel 24 and the stopping means 28, 29, 30 are mounted, contacts the pin of the limitingmeans 31 and the rotatable unit is in the inverted position (figure 4) which was selected in advance. The user can now release the second handle to lock therotatable unit 1 in the inverted position, so that he can maintain therotatable unit 1 in the inverted position for as long as he wishes to, without there being a risk that therotatable unit 1 rotates any further or back. In the inverted position, the user's back is stretched by the user's own body weight. Thelap restraint 5 prevents the user from falling out of the chair and the force applied by thefootrest 6 holds the user's lower legs in position. - In order to rotate the
unit 1 back to the upright position, the user operates the second handle to allow the rotation of theunit 1 and rotates thelever 25 until theframe 20 contacts thestop 33 and theunit 1 is back in the upright position (figure 3). In order to get out of the chair, the user again operates the first handle to open the valve of thegas spring 8, after which he can push down thefootrest 6 until it is back in the open position (figure 2). By pushing down thefootrest 6, thepiston rod 12 is moved back into thecylinder 13 of the gas spring, and thelap restraint 5 is moved back to the lifted position. By releasing the first handle, the valve is closed, so that thefootrest 6 and thelap restraint 5 are locked in their respective positions. To get out of the chair, the user removes thelap restraint 5. - In the second embodiment of the orthopaedic chair of the invention shown in figures 6a and b, the
rotatable unit 1 is provided with means 34-37 for enhancing the stretching force exerted on the user's back in the inverted position. These means preferably comprise aheadrest 34 for supporting the user's head which is located on the upper part of thebackrest 4 and protrudes from it. Thisheadrest 34 is in such a way mounted on thebackrest 4 that it is movable in longitudinal direction of the backrest. Theheadrest 34 is connected to aweight 35 by means of acable 36 which runs along adouble pulley 37 provided on the back side of thebackrest 4. As thecable 36 runs along thedouble pulley 37, theweight 35 only pulls theheadrest 34 towards the top of thebackrest 4 in the inverted position. By means of this arrangement, the stretching force exerted on the user's back in the inverted position can be enhanced, as the headrest pulls the head of the user slightly in the direction of the top of the backrest in the inverted position. A suitable weight value for theweight 35 is for example one or two kilograms or more or less. Theheadrest 34 preferably has a concave shape, for example a shell, so that the back of the user's head is easily accommodated on the headrest. -
- 1.
- Rotatable unit
- 2.
- Stand
- 3.
- Seat
- 4.
- Backrest
- 5.
- Lap restraint
- 6.
- Footrest
- 7.
- Pivotable lever
- 8.
- Gas spring
- 9.
- Pivot axis
- 10.
- Front end
- 11.
- Rear end
- 12.
- Piston rod
- 13.
- Cylinder
- 14.
- Pivot axis
- 15.
- Connector bars
- 16.
- First end
- 17.
- Second end
- 18.
- Slidable mounting
- 19.
- Fixing points
- 20.
- Frame
- 21.
- Lateral bars
- 22.
- Rotation axis
- 23.
- Large gear wheel
- 24.
- Small gearwheel
- 25.
- Lever
- 26.
- Removable member
- 27.
- Holding bars
- 28.
- Liftable member
- 29.
- Spring
- 30.
- Stops
- 31.
- Holes
- 32.
- Mounting plate
- 33.
- Stop
- 34.
- Headrest
- 35.
- Weight
- 36.
- Cable
- 37.
- Double pulley
Claims (10)
- An orthopaedic chair for stretching the back of a user, the chair comprising a rotatable unit (1) having a seat (3) and a backrest (4), the rotatable unit (1) being rotatable about a substantially horizontal axis (22) between an upright position and an inverted position, the rotatable unit (1) being provided with a lap restraint (5) for securing the user to the seat (3), characterised in that the rotatable unit (1) is provided with means (6-8) for applying a force to the soles of the user's feet in the direction of the lap restraint (5).
- An orthopaedic chair according to claim 1, characterised in that the force applying means (6-8) comprise a footrest (6) provided to engage the soles of the user's feet and moving means (7-8) for moving the footrest (6) from an open position, in which the user's lower legs are loosely accommodated between the footrest (6) and the lap restraint (5), to a clamping position, in which the user's lower legs are clamped between the footrest (6) and the lap restraint (5).
- An orthopaedic chair according to claim 2, characterised in that the moving means (7-8) comprise a pivotable lever (7) on the rotatable unit (1) which is provided to pivot about a substantially horizontal pivot axis (9) extending transversally of the rotatable unit (1), and drive means (8) for pivoting the lever (7), the pivotable lever (7) having a front end (10) in front of the pivot axis (9) onto which the footrest (6) is mounted and a rear end (11) behind the pivot axis (9) connected to the drive means (8).
- An orthopaedic chair according to claim 3, characterised in that the drive means (8) comprise a blockable gas spring (8) which is mounted between the rear end (11) of the lever and a bottom side of the seat (3).
- An orthopaedic chair according to any one of claims 2-4, characterised in that the lap restraint (5) is movably mounted on the rotatable unit (1) between a lifted position in which the user's upper legs are loosely accommodated between the lap restraint (5) and the seat (3), and a securing position in which the user's upper legs are clamped between the lap restraint (5) and the seat (3), and that the lap restraint (5) is in such a way connected to the moving means (7-8) that the lap restraint (5) is moved from the lifted position to the securing position upon movement of the footrest (6) from the open position to the clamping position.
- An orthopaedic chair according to any one of claims 2-5, characterised in that the distance between the footrest (6) and the seat (3) is adjustable.
- An orthopaedic chair according to any one of claims 1-6, characterised in that the chair comprises drive means (23-25) for rotating the rotatable unit (1) between the upright position and the inverted position.
- An orthopaedic chair according to any one of claims 1-7, characterised in that the chair is provided with stopping means (28-30) for stopping the rotation of the rotatable unit (1) in any intermediate position between the upright position and the inverted position.
- An orthopaedic chair according to any one of claims 1-8, characterised in that the chair is provided with limiting means (31-32) for limiting the maximum angle over which the rotatable unit (1) can be rotated.
- An orthopaedic chair according to any one of claims 1-9, characterised in that the chair is provided with means (34-37) for enhancing the stretching force exerted on the user's back in the inverted position.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT01870001T ATE281139T1 (en) | 2001-01-02 | 2001-01-02 | ORTHOPEDIC CHAIR |
EP01870001A EP1219277B1 (en) | 2001-01-02 | 2001-01-02 | Orthopaedic chair |
DE60106849T DE60106849D1 (en) | 2001-01-02 | 2001-01-02 | Orthopedic chair |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP01870001A EP1219277B1 (en) | 2001-01-02 | 2001-01-02 | Orthopaedic chair |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1219277A1 true EP1219277A1 (en) | 2002-07-03 |
EP1219277B1 EP1219277B1 (en) | 2004-11-03 |
Family
ID=8184911
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01870001A Expired - Lifetime EP1219277B1 (en) | 2001-01-02 | 2001-01-02 | Orthopaedic chair |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1219277B1 (en) |
AT (1) | ATE281139T1 (en) |
DE (1) | DE60106849D1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005002679A3 (en) * | 2003-07-07 | 2005-06-02 | Den Heever Barend J Van | Exercise apparatus |
ITCH20100018A1 (en) * | 2010-06-24 | 2011-12-25 | Gianleo Berardinelli | BENCH FOR TOTAL SPACH DECOMPRESSION |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0131167A2 (en) * | 1983-06-14 | 1985-01-16 | Hillar T. Lilles | Therapeutic device for body stretching |
US4531731A (en) * | 1984-01-09 | 1985-07-30 | Unique Functional Products | Gymnastic equipment |
GB2152381A (en) * | 1984-01-06 | 1985-08-07 | Benjamin Clovis Moomaw | Physiotherapy table for traction and/or massage |
US5070863A (en) * | 1990-03-08 | 1991-12-10 | Baltimore Therapeutic Equipment Co. | Back exercise apparatus |
WO1997027904A1 (en) * | 1996-01-31 | 1997-08-07 | Inversion International Limited | Inversion device |
US6004246A (en) * | 1998-03-27 | 1999-12-21 | Medx 96, Inc. | Lower back exercise machine including leg engaging assembly for isolating the lower torso |
-
2001
- 2001-01-02 EP EP01870001A patent/EP1219277B1/en not_active Expired - Lifetime
- 2001-01-02 AT AT01870001T patent/ATE281139T1/en not_active IP Right Cessation
- 2001-01-02 DE DE60106849T patent/DE60106849D1/en not_active Expired - Lifetime
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0131167A2 (en) * | 1983-06-14 | 1985-01-16 | Hillar T. Lilles | Therapeutic device for body stretching |
GB2152381A (en) * | 1984-01-06 | 1985-08-07 | Benjamin Clovis Moomaw | Physiotherapy table for traction and/or massage |
US4531731A (en) * | 1984-01-09 | 1985-07-30 | Unique Functional Products | Gymnastic equipment |
US5070863A (en) * | 1990-03-08 | 1991-12-10 | Baltimore Therapeutic Equipment Co. | Back exercise apparatus |
WO1997027904A1 (en) * | 1996-01-31 | 1997-08-07 | Inversion International Limited | Inversion device |
US6004246A (en) * | 1998-03-27 | 1999-12-21 | Medx 96, Inc. | Lower back exercise machine including leg engaging assembly for isolating the lower torso |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005002679A3 (en) * | 2003-07-07 | 2005-06-02 | Den Heever Barend J Van | Exercise apparatus |
CN100379475C (en) * | 2003-07-07 | 2008-04-09 | 巴伦德·J·范登赫弗 | Exercise apparatus |
ITCH20100018A1 (en) * | 2010-06-24 | 2011-12-25 | Gianleo Berardinelli | BENCH FOR TOTAL SPACH DECOMPRESSION |
Also Published As
Publication number | Publication date |
---|---|
DE60106849D1 (en) | 2004-12-09 |
ATE281139T1 (en) | 2004-11-15 |
EP1219277B1 (en) | 2004-11-03 |
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