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Title:
EXAMINATION CHAIR
Document Type and Number:
WIPO Patent Application WO/2003/103561
Kind Code:
A1
Abstract:
A seat/chair for medical examination and/or treatment is described, comprising a seatplate (50), a back plate (52) and one or more foot plates (51; 80, 80'), said plates (50, 52, 51, 80, 80') are mutual stepless variable, said seat/chair comprises the following bodies: a first body for raising and lowering the seat/chair in the vertical direction; a second body for adjusting the position of the seat/chair about a generally horisontal axis; a third body for adjusting the seat/chair's position about a second, generally horisontal axis; a fourth body for adjusting the position of the back plate (52) in relation to the seat plate (50); a fifth body for adjusting the position of the seat plate (50) in relation to a generally horisontal plane; a sixth body for adjusting the position of the foot plate or plates (51; 80, 80') in relation for the seat plate (50).

Inventors:
Øvereng, Sigmund (Agathe Brondahlsgate 26, Oslo, N-0478, NO)
Application Number:
PCT/NO2003/000190
Publication Date:
December 18, 2003
Filing Date:
June 10, 2003
Export Citation:
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Assignee:
Confidence, Medesign AS. (Oscarsgate 36A, Oslo, N-0258, NO)
Øvereng, Sigmund (Agathe Brondahlsgate 26, Oslo, N-0478, NO)
International Classes:
A61G15/00; A61G15/04; A61G5/14; A61G7/00; (IPC1-7): A61G15/04
Foreign References:
US4847929A
US4168099A
US3984146A
US4558857A
Attorney, Agent or Firm:
Protector, Consultants IP. AS. (P.O. Box 5074 Majorstuen, Oslo, N-0301, NO)
Download PDF:
Claims:
Claims
1. 1. Chair/seat for medical examination and/or treatment, comprising a seat plate (50), a back plate (52) and one or more footplates (51 ; 80; 80'), said plates (50, 52,51, 80,80') are mutual stepless variable, characterised in that the chair/seat comprises the following bodies: a first body for raising and lowering the chair/seat in a vertical direction, a second body for adjusting the position of the chair/seat about the first, generally horizontal axis, a third body for adjusting the position of the chair/seat about a second, generally horizontal axis, a fourth body for adjusting the position of the back plate (52) in relation to the seat plate (50), a fifth body for adjusting the position of the seat plate (50) in a generally horizontal plane, and a sixth body for adjusting of the position of the footplate or footplates (51 ; 80,80') in relation to the seat plate (50). *& 2.
2. Chair/seat for medical examination and/or treatment in accordance with claim 1, characterised in that the first body for raising and lowering of the chair/seat in the vertical direction is comprised of a parallelogram mechanism comprising a base (1) with two upwardly extending posts (2,3), a first pair of struts (4,5), a second pair of struts (6,7) and a pair of generally Lshaped beams (8,9), said first pair of struts (4,5) are rotationally fastened at their one ends to their own upwardly extending post (2,3) and at their other ends, are rotationally fastened near one end to their own Lshaped beams (8,9), said second pair of struts (6,7) are rotationally fastened at their one ends near the upper end to their own upwardly extending post (2,3) and at their other end rotationally fastened to their own Lshaped beam (8,9) and also an electric, mechanical or pneumatic actuator (12) which, at its one end, is connected to the base (1) and at its other end, is connected to a plateformed body (11) that connects the Lformed beams (8,9) or an additional beam (13) that connects the Lshaped beams (8,9).*& 3.
3. Chair/seat for medical examination and/or treatment in accordance with one or more of the preceding claims, characterised in that the second body for adjusting the position of the chair/seat about a first, generally horizontal axis, i. e. adjusting the seat plate (50) of the chair/seat to a forward leaning or backward leaning position, comprises a platelike element (14) having an approximately central, through hole (15), with the bare part of the element (14) being rotationally connected to each of the Lshaped beams (8,9) with the help of a pair of rotational shafts (16), and an actuator (17) which, in its one end, is connected to the plateformed element (14) and, at its other end, to the additional beam (13) which connects the two Lshaped beams (8,9).*& 4.
4. Chair/seat for medical examination and/or treatment in accordance with claim 3, characterised in that the third body for adjusting the position of the chair/seat about a second, generally horizontal axis, i. e. adjusting the position of the seat plate (50) sideways, comprises an adjustment element (18) arranged in the through hole (15) in the plateformed body (14), said adjustment element (18) being rotationally connected at both ends to the plateformed body (14) with a pair of shafts (20,20'), said third body comprises a mechanism for locking of the position of the seat plate (50).*& 5.
5. Chair/seat for medical examination and/or treatment in accordance with one or more of the preceding claims, characterised in that the fourth body for adjusting the position of the back plate (52) in relation to the seat plate (50) comprises a rotational hinge connection between the back plate (52) and the seat plate (50) and an adjustment body (61) in the form of an electric, mechanical or pneumatic actuator for stepless adjustment of position of the back plate (52) in relation to the seat plate (50).*& 6.
6. Chair/seat for medical examination and/or treatment in accordance with one or more of the preceding claims, characterised in that the fifth body for adjusting the position of the seat plate (50) in a generally horizontal plane comprises a downwardly extending knob (29) arranged on the underside of the seat plate (50), said knob (29) being rotationally arranged in the through hole (19) in the adjustment body (18).*& 7.
7. Chair/seat for medical examination and/or treatment in accordance with one or more of the preceding claims, characterised in that the sixth body for adjusting the position of the footplate (51) in relation to the seat plate (50) comprises a hinge device that connects the seat plate (50) and the footplate (51), and also an adjusting device (58) for adjusting the angle of the footplate (51) in relation to the seat plate (51), said adjustment device being a manually adjustable spring device or a mechanical, electric or pneumatic actuator.*& 8.
8. Chair/seat for medical examination and/or treatment in accordance with one or more of the claims 17, characterised in that the sixth body for adjusting the position of the footplates (80,80') in relation to the seat plate (50) comprises an arm (81) which is rotationally connected, at its one end, to one of the footplates (80,80') with the help of an articulated connection (84) and, at its other end, rotationally connected to a bracket (83), an adjustment body (82) which, in its one end, is rotationally connected to the footplate (80,80') and, in its other end, connected to the articulated connection (84) for stepless adjustment of the position of the footplate (80,80') in relation to the arm (81), an adjustment body (85) for stepless adjustment of the position of the arm (81) in relation to the bracket (83), said adjustment body (85) is connected, at its one end, to the arm (81) and, at its other end, is connected to the bracket (83), said bracket (83) also comprises a knob (86) that is rotationally connected to the seat plate (50), the back plate (52) or the hinge connection between the mentioned plates, and also to a locking mechanism (85) for locking of the movement of the bracket (85) to the back plate (52).*& 9.
9. Chair/seat for medical examination and/or treatment in accordance with one or more of the preceding claims, characterised in that the first body is mobile in the order of 0500mm, the second body is mobile in the order of 020°, the third body is mobile in the order of 10°, the fourth body is mobile in the order of 090° and the fifth body is mobile in the order of 90'. New claims 1. Chair/seat for medical examination and/or treatment, comprising a seat plate (50), a back plate (52) and one or more footplates (51 ; 80,80'), said plates (50, 52,51, 80,80') are mutual stepless variable, characterised in that the chair/seat comprises the following bodies: a first body for raising and lowering the chair/seat in a vertical direction, a second body for adjusting the position of the chair/seat about the first, generally horizontal axis a third body for adjusting the position of the chair/seat about a second, generally horizontal axis, a fourth body for adjusting the position of the back plate (52) in relation to the seat plate (50), a fifth body for adjusting the position of the seat plate (50) in a generally horizontal plane, and a sixth body for adjusting the position of the footplate or footplates (51 ; 80,80') in relation to the seat plate (50). Said second body for adjusting the position of the chair/seat about a first, generally horizontal axis, i. e. adjusting the sitting plate (50) of the chair/seat to a forward leaning or backward leaning position, comprising a platelike element (14) with an approximately central, through hole (15), as the bare part of the element (14) is rotationally connected to each of the Lshaped beams (8,9) with the help of a pair of rotational shafts (16), and an actuator (17) which, in its one end, is connected to the plateformed element (14) and, at its other end, to the additional beam (13) that connects the two Lshaped beams (8,9). And said third body for adjusting the position of the chair/seat about a second, generally horizontal axis, i. e. adjusting the position of the seat plate (50) sideways, comprising an adjustment element (18) arranged in the through hole (15) in the plateformed body (14), said adjustment element (18) is rotationally connected, at both ends, to the plate formed body (14) with a pair of shafts (20,20'), said third body comprises a mechanism for locking the position of the seat plate (50). *& 2.
10. Chair/seat for medical examination and/or treatment in accordance with claim 1, characterised in that the first body for raising and lowering of the chair/seat in the vertical direction is comprised of a parallelogram mechanism comprising a base (1) having two upwardly extending posts (2,3), a first pair of struts (4,5), a second pair of struts (6,7) and a pair of generally Lshaped beams (8,9), said first pair of struts (4,5) are rotationally fastened, at their one ends, to their own upwardly extending post (2,3) and, at their other ends, are rotationally fastened near one end to their own Lshaped beam (8,9), said second pair of struts (6,7) are rotationally fastened, at their one ends, near the upper end, to their own upwardly extending post and, at their other end, rotationally fastened to their own Lshaped beam (8,9), and also an electric, mechanical or pneumatic actuator (12) which is connected, at its one end, to the base (1) and, at its other end, is connected to a plateformed body (11) that connects the Lshaped beams (8,9) or an additional beam (13) that connects the Lshaped beams (8,9).*& 3.
11. Chair/seat for medical examination and/or treatment in accordance with one or more of the preceding claims, c h a r c t e r i s e d i n that the fourth body for adjustment of the position of the back plate (52) in relation to the seat plate (50) comprises a rotational hinge connection between the back plate (52) and the seat plate (50) and an adjustment body (61) in the form of an electric, mechanical or pneumatic actuator, for stepless adjustment of the position of the back plate (52) in relation to the seat plate (50).*& 4.
12. Chair/seat for medical examination and/or treatment in accordance with one or more of the preceding claims, c h a r c t e r i s e d i n that the fifth body for adjustment of the position of the seat plate (50) in a generally horizontal plane comprises a downwardly extending knob (29) arranged on the underside of the seat plate (50), said knob (29) is rotationally arranged in the though hole (19) in the adjustment body (18).*& 5.
13. Chair/seat for medical examination and/or treatment in accordance with one or more of the preceding claims, c h a r c t e r i s e d i n that the sixth body for adjustment of the position of the footplate (51) in relation to the seat plate (50) comprises a hinge device which connects the seat plate (50) and the footplate (51), and an adjustment device (58) for adjusting the angle of the footplate (51) in relation to the seat plate (51), said adjustment device is a manually adjustable spring device or a mechanical, electric or pneumatic actuator.*& 6.
14. Chair/seat for medical examination and/or treatment in accordance with one or more of the claims 15, c h a r c t e r i s e d i n that the sixth body for adjustment of the position of the footplates (80,80') in relation to the seat plate (50) comprises an arm (81) which, at its one end, is rotationally connected to one of the footplates (80,80') with the help of an articulated connection (84) and rotationally connected to a bracket (83) at its other end, an adjustment body (82) which is rotationally connected, at its one end, to the footplate (80,80') and, at its other end, is connected to the articulated connection (84) for stepless adjustment of the position of the footplate (80,80') in relation to the arm (81), an adjustment body (85) for stepless adjustment of the position of the arm (81) in relation to the bracket (83), said adjustment body (85) is connected, at its one end, to the arm (81) and connected to the bracket (83) at its other end, said bracket (83) also comprises a knob (86) which is rotationally connected to the seat plate (50), the back plate (52) or the hinge connection between the mentioned plates, in addition to a locking mechanism (85) for locking the movement of the bracket (83) to the back plate (52).*& 7.
15. Chair/seat for medical examination and/or treatment in accordance with one or more of the preceding claims, c h a r c t e r i s e d i n that the first body is mobile in the order of 0500 mm, the second body is mobile in the order of 020°, the third body is mobile in the order of 10°, the fourth body is mobile in the order of 090° and the fifth body is mobile in the order of i90°.
Description:
Examination chair The present invention relates to an examination chair according to the preamble of the independent claims.

In the subsequent description and claims, the term examination chair will be used for a device according to the invention, but the term is also meant to include examination chairs/seats.

A series of different examination chairs of the type mentioned initially are previously known, but most of these known examination chairs fulfil one function only.

For example, examination chairs for use in dentist surgeries are known, but these chairs/seats can only be moved in the vertical direction, at the same time as the back of the chair and foot rest can be moved independently of each other. Furthermore, similar chairs/seats for use in gynaecological examinations are known, with corresponding movement possibilities, and which in addition are equipped with leg supports. A disadvantage with these types of examination chairs is that the patient must"climb into" the chair because the leg supports normally have a limited freedom of movement in the vertical direction. Furthermore, a series of different examination chairs that can move in the vertical direction are known, and which, in addition, have independently adjustable back and/or foot support elements.

Thus, most of the known examination chairs have a limited number of position possibilities, something which leads to it often being necessary to use several types of examination chairs (for example a seat and a chair) to achieve the most common examination positions.

An aim of the present invention is to provide an examination chair treatment of the type mentioned initially, that can be used for a number of different treatment forms or examination methods, for example, gynaecological, cardiological, ear-nose-throat examinations or treatments or the like. The chair according to the invention can be a combination of a common treatment seat/chair and a gynaecological chair.

Another aim of the invention is to provide an examination chair that has more position possibilities than previously known chairs.

Yet another aim of the invention is to provide an examination chair of the type mentioned initially which replaces several of the products that usually are present in a treatment room.

This is achieved with a chair/seat for medical examination and/or treatment, comprising a seat plate, a back plate and one or more footplates, said plates are mutual stepless variable, characterised in that the chair/seat comprises the following bodies: - a first body for raising and lowering of the seat/chair in the vertical direction, - a second body for adjusting the position of the seat/chair about the first in a generally horizontal axis, - a third body for adjusting the position of the seat/chair about a second, generally horizontal axis, - a fourth body for adjusting the position of the back plate in relation to the seat plate, - a fifth body for adjusting the position of the seat plate in a generally horizontal plane, and - a sixth body for adjusting the position of the footplate or footplates in relation to the seat plate.

The first body for raising and lowering of the seat/chair in the vertical direction is preferably comprised of a parallelogram mechanism comprising a base with two upwardly extending posts, a first pair of struts, a second pair of struts and a pair of generally L-shaped beams, said first pair of struts are rotationally fastened, at their one ends, to their own upwardly extending post and, at their other ends, are rotationally fastened near one end to their own L-shaped beam, said other pair of struts are rotationally fastened at their one ends, near the upper end, to their own upwardly extending post and at their other ends, rotationally fastened to their own L-shaped beam, in addition to an electric, mechanical or pneumatic actuator that, at its one end is

connected to the base and at its other end is connected to a plate-formed body which connects the L-shaped beams or to a further beam that connects the L-shaped beams.

The second body for adjusting the position of the seat/chair about a first, generally horizontal axis, i. e. adjusting the seat plate of the seat/chair to a forward leaning or backward leaning position, preferably comprises a plate-like element with an approximately central, through hole, with the bare part of the element being rotationally connected to each of the L-shaped beams with the aid of a pair of rotational shafts, as well as an actuator which, at its one end, is connected to the plate-formed element and at its other end to the additional beam that connects the two L-shaped beams.

The third body for adjusting the position of the seat/chair about a second, generally horizontal axis, i. e. adjusting the position of the seat plate sideways, comprises an adjustment element placed in the through hole in the plate-formed body, said adjustment element is rotationally connected at each of its ends to the plate-formed body by a pair of shafts, said third body comprises a mechanism for locking the position of the seat plate.

The fourth body for adjusting the position of the back plate in relation to the seat plate preferably comprises a rotational hinge-connection between the back plate and the seat plate and an adjustment body in the form of an electric, mechanical or pneumatic actuator for stepless adjustment of the position of the back plate in relation to the seat plate.

The fifth body for adjusting the position of the seat plate in a generally horizontal plane preferably comprises a downwardly extending knob arranged on the underside of the seat plate, said knob being rotationally arranged in the through hole in the adjustment body.

The sixth body for adjusting the position of the footplate in relation to the seat plate preferably comprises a hinge device that connects the seat plate and the footplate, in addition to an adjustment device for adjustment of the angle of the

footplate in relation to the seat plate, said adjustment device is a manually adjustable spring device or a mechanical, electric or pneumatic actuator.

In accordance with a special embodiment, the sixth body for adjusting the position of the footplate in relation to the seat plate preferably comprises an arm, which, in its one end, is rotationally connected to one of the footplates with the help of an articulated connection and, at its other end, is rotationally connected to a bracket, an adjustment body, which, in its one end, is rotationally connected to the footplate and, at its other end, is connected to the articulated connection for stepless adjustment of the position of the footplate in relation to the arm, an adjustment body for stepless adjustment of the position of the arm in relation to the bracket, said adjustment body is connected, at its one end, to the arm and, at its other end, connected to the bracket, said bracket also comprises a knob which is rotationally connected to the seat plate, back plate or the hinge-connection between the mentioned plates, in addition to a locking mechanism for locking the movement of the bracket to the back plate.

The first body is preferably movable in the order of 0-500 mm, the second body is movable in the order of 0-20°, the third body is movable in the order of 10', the fourth body is movable in the order of 0-90° and the fifth body is movable in the order of 90'.

More details of the invention will be given in the following with the help of embodiment examples, with reference to the enclosed figures, in which: Figs. 1-2 show an embodiment of the examination chair according to the present invention.

Fig 3 shows an embodiment of a mechanism for raising/lowering of the examination chair according to figs. 1-3, said mechanism is shown in a raised position.

Fig. 4 shows the mechanism for raising/lowering of the examination chair in a lowered position.

Fig. 5 shows an embodiment of a mechanism for adjusting the sitting plate of the examination chair forwards and backwards.

Figs. 6-8 show an embodiment of a mechanism for adjusting the inclined position of the examination chair sideways.

Fig. 9 shows an embodiment of the lying plates of the chair viewed from below.

Figs 10 and 11 show an embodiment of the invention which is especially appropriate for carrying out gynaecological examinations.

Figs. 12 a) -c) show sections of the lying plates of the chair.

In the following, the examination chair will be described in more detail with the help of an embodiment example. A preferred embodiment of the examination chair is shown in the figures 1 and 2, that show a perspective view of the chair in different positions. The examination chair shown comprises, as shown in figs. 1-2, a seat plate 50, a leg plate 51 and a back plate 52. The plates 50-52 are independently adjustable in relation to each other, whilst the examination chair is equipped with different mechanisms to give it a series of different movement options and adjustment options. In the following, these different mechanisms will be separately described in more detail, whereupon the whole assembly of the chair will be explained.

Figs. 10-11 show a special embodiment of the examination chair according to the present invention especially adapted for gynaecological examinations.

Figs. 12 a) -c) show how the sitting/lying plates are built up.

Figure 1 shows the examination chair in a first, so-called entering position, in which the chair has a position corresponding to that of an ordinary chair.

Figure 2 shows the examination chair in a second, lying position with the back plate 52, seat plate 50 and the leg plate 51 in a mutually, approximately horizontal position.

Figs. 3 and 4 show an advantageous mechanism for raising/lowering of the examination chair according to the present invention. Fig. 3 shows the mechanism in a raised position, while fig. 4 shows the mechanism in a lowered position. The raising/lowering mechanism comprises a base 1 with two upwardly extending posts 2,3, a first pair of struts 4, 5, a second pair of struts 6,7 and a pair of generally L-shaped beams 8,9. The first pair of struts 4,5 are, at their one ends, rotationally fastened to their own upwardly extending post 2,3 and at their other end rotationally fastened near the end to their own L-shaped beam 8,9. The second pair of struts 6,7 are, at their one ends, rotationally fastened near the upper end of their own upwardly extending post 2,3 and at their other ends rotationally fastened to their own L-shaped beam 8,9. The second pair of struts 6,7 may also be mutually connected with the help of a plate- formed body 10, and correspondingly, the L-shaped beams 8,9 may be connected to each other with the help of a plate-formed body 11 (figs. 1 and 2). For clarity, the plate- formed body 11 is not shown in figs. 3 and 4. In addition, the raising/lowering mechanism embraces an actuator 12, in the form of, for example, a hydraulic, pneumatic or electric actuator 12, that is connected to the base 1 at its one end and at its other end, is connected to the plate-formed body 11 that connects the L-shaped beams 8, 9 or possibly, or in addition, a further beam 13 that connects the two L-shaped beams 8, 9.

The upwardly extending posts 2,3, the first and second pairs of struts 4, 5 6,7 and the L-shaped beams 8,9 will together form a parallelogram. In activating the actuator 12, the L-shaped beams 8,9 will be raised, at the same time as the relative position of the L-shaped beams 8,9 will be retained. The upper arm of the L-shaped beams, which in the position shown in fig. 4 has an approximately horizontal position,

will move upwards when the actuator 12 is activated, at the same time as the approximately horizontal position of the upper arms of the L-shaped beams 8,9 is maintained.

The lifting height of the mechanism is preferably of the order of 50 cm.

An embodiment of a mechanism for adjusting the seat plate of the examination chair to a forward leaning and backward leaning position is shown in fig.

5. This mechanism comprises a plate-like element 14 with an approximately central, through hole 15. The rear part of the plate-formed element 14 is rotationally connected to each of the L-shaped beams 8,9 with the help of a pair of rotational shafts 16, of which only one is shown in fig. 5. To show the mechanism more clearly, the plate- formed body 11 in figs. 3,4, that connects the two L-shaped beams 8,9, is omitted in fig. 3. The mechanism further comprises an actuator 17, which, at its one end, is connected to the plate-formed element 14 and, at its other end, to the additional beam 13 that connects the two L-shaped beams 8,9. Similarly to the actuator 12 (figs. 3 and 4), this actuator 17 can be driven, for example, hydraulically, pneumatically or electrically.

In activating the actuator 17, the plate-formed element 14 will be able to rotate about the shafts 16 and, as explained in the following, move the sitting plate 50 of the examination chair to a forward leaning and backward leaning position, respectively, in an angular motion of about 20°.

Figs. 6 and 7 show schematically the mechanism for inclining the sitting plate 50 sideways, in the following described as a sideways tilt.

The sideways tilt mechanism comprises an adjustment element generally designated with reference number 18. This adjustment element 18 comprises a through hole 19, the function of which will be further explained later, and is placed in the through hole 15 in the plate-formed body 14. In each of its end, at the front and back, respectively, the adjustment element 18 is rotationally connected to the plate-formed body 14 with the help of shafts 20, 20'. This means that the adjustment element 18 can

be rotated about an axis A-A that runs between the two shafts 20, 20' and thereby sideways tilt the chair by up to 10'when this is placed onto the chassis.

Figs. 7 and 8 show in more detail a body for adjusting and locking the sideways tilt of the adjustment element 18. Figure 7 is somewhat simplified, as only the L-shaped beams 8,9 and the plate-formed body 14 are shown. The other elements are removed. In figure 7, the plate-formed body 14 is shown equipped with a bracket 21 provided with through holes 22,22', 22". In the embodiment shown, there are three through holes, but there can be more or fewer holes. Also shown is a spring-loaded knob 23 that extends into one of the holes 22,22', 22". The knob 23 has a conical shape in the end that extends into one of the holes 22,22', 22"to prevent any slack. At its other end, the knob 23 is equipped with a bracket 25. Figure 8 is a simplified view of how the sideways tilt mechanism works. Here, the plate-formed body 14 is removed to show the mechanism more clearly. The adjustment element 18 is equipped with a bracket 24 at its lower end, to secure a wire of the like which is also connected to the bracket 25 on the spring-loaded knob 23. When the bracket 25 is pulled towards the bracket 24, the spring-loaded knob 23 will disengage with the hole 22,22', 22", and the adjustment element 18 can rotate about the axis A-A (fig. 6), until the knob 23 enters into another of the holes 22,22', 22".

To prevent the seat plate 50 and thereby the whole chair from rotating about a vertical axis B-B (fig. 8) when the seat plate is tilted sideways, the adjustment element 18 is equipped with a further spring-loaded knob 26 that will extend into complimentary formed holes on the underside of the seat plate 50. The spring-loaded knob 26 can be activated, for example, with the help of a wire or a mechanical transmission, corresponding to the activation of the knob 23 (fig. 7) for adjustment of the sideways tilt. In a non-locked position, the seat plate can be rotated 90'absout an axis which is perpendicular to the floor plane.

An embodiment of the seat plates of the chair itself is shown in figure 8.

As previously mentioned, these comprise a seat plate 50, a footplate 51 and a back plate 52. Each of these plates is hinge-connected to each other and is thereby independently

adjustable. The footplate 51 is hinge-connected to the seat plate 50 and the seat plate 50 and the footplate 51 are connected to each other with the help of an adjustment device 58. This adjustment device is connected at its one end to the seat plate 50 and, at its other end, connected to the footplate 51. The adjustment device can be a spring-loaded device, for example, that enables the footplate to retain its position when adjusted manually. The adjustment device 58 can also be an actuator of a type similar to the actuators 12,17 that are described previously, so that the footplate 51 can be adjusted automatically.

Correspondingly, the back plate 51 is hinge-connected to the seat plate 50.

The seat plate 50 and the back plate 52 are also adjustable in relation to each other with the help of an adjustment device 61. This adjustment device 61 can be of the same type as the adjustment device 58 between the seat plate 50 and the footplate 51, but is preferably a hydraulically, pneumatically or electrically driven actuator. One end of this adjustment device 61 is connected to the back plate 52, while the other end is connected to a bracket 53 on the seat plate 50. Furthermore, the examination chair can be provided with armrests 54 that are secured to the seat plate 50 and/or the back plate 52. The seat plate 50 is also equipped with a pipe-formed or cylinder-formed knob 29. When the chair itself is placed on the chassis, the knob 29 will extend down into the hole 19 in the adjustment body 18 (fig. 6) and thereby be connected to the chassis, possibly with the help of a bearing (not shown).

With help of the mechanisms described above, the examination chair, according to the present invention, can be moved up, down and sideways, and the chair itself can be rotated. In addition, the different elements of the chair itself are independently mobile in relation to each other.

Figures 10 and 11 show a special embodiment of the examination chair according to the present invention, in which the footplate 51 (figs. 1,2) is replaced by two separate footplates 80,80'. This embodiment is especially appropriate for use in gynaecological examinations. A problem with known chairs for such examinations was that the patients had to climb into the chair and thereafter lift their legs onto the

footplates. This was a difficult operation, particularly for elderly people and people with restricted mobility. The two footplates 80,80'and the associated adjustment mechanism are mirror symmetrical so that the function of only one of the footplates 80,80'will be explained. Figure 11 shows in more detail a footplate 80 with associated adjustment body. The adjustment body comprises an arm 81 that is articulately connected 84, at its one end, to the footplate 80 and connected to a bracket 83 at its other end. Between the arm 81 and the footplate 80, an adjustment body 82 is provided, for example, in the form of a gas lift or possibly an actuator of the type corresponding to the actuators 17, 61. With the help of the joint 84 and the adjustment body 82, the angle of the footplate 80 in relation to the arm 81 can be steplessly adjusted and locked. The other end of the arm 81 is rotationally connected to the bracket 83 and comprises a further adjustment body 85 for adjustment and locking of the position of the arm 81 in relation to the bracket 83. This adjustment body 85 is preferably a gas lift, but can possibly also be in the form of an actuator corresponding to the actuators 17,61, 82, described earlier. This rotational fastening of the arm 81 to the bracket 83 results in the arm being able to swing outwards.

The bracket 83 is further equipped with a knob 86 which is arranged to be rotationally led into a complimentary shaped opening in the seat plate 50 or the back plate 52, preferably in the corresponding opening that the armrest 54 is secured to (see fig. 9). The bracket 83 is further equipped with an adjustment body 87 for stepless adjustment and locking of the rotation of the knob 86 in the mentioned opening. The bracket 83 is equipped with a bracket 89 which is secured to the adjustment body 87 and which can rotate about the bracket 86. The bracket 89 is connected to a locking mechanism 88 in the form of a spring-loaded knob to lock the rotation of the knob 86.

The aim of the locking mechanism is that the arm 81 and thereby the footplates 80 and 80'will be raised when the back plate is lowered backwards.

The shape of the footplate 80 and the adjustment mechanism described above means that a patient who is to be examined can sit up in the chair while it has a position corresponding to a normal chair (as shown in fig. 1, apart from the footplate 51 being replaced by the footplates 80,80'and these having an approximate vertical

position). When the back plate 52 is lowered backwards, the footplates 80,80'are raised and the patient's legs achieve a position that is appropriate for gynaecological examinations.

The lying/sitting plate itself 50,52 is shown in section in figures 12 a)-c).

The plate comprises a relatively rigid shell 70, manufactured by, for example, compressed wood material or moulded plastic that acts as a load-bearing structure.

Arranged on top of this shell 70 is a relatively thin cushion, comprising a relatively compact and hard upper layer 72 and a softer lower layer 71. The upper layer 72, for example, can be a foamed plastic material with closed pores, while the lower layer 71 can be a foamed plastic material with open pores. The aim of this composition of the lying/sitting plate is to provide a relatively thin plate with a defined surface, in which the patient does not sink into the cushion, at the same time as a good pressure relief is maintained. When the patient lies on his/her back or stomach (as shown in fig. 9b) the plate-pressure per unit of area is relatively low, and the lower layer will be compressed to a small extent. If the patient, for example, lies on his/her side (as shown in fig. 9c) the plate-pressure on some of the parts of the body will increase, and the lower layer will be compressed so that the cushion provides better support to the patient. In addition, the edges of the seat plate 50 and/or the back plate 52 can be bent slightly upwards to provide further support for the patient and at the same time prevent that the patient rolls off the chair when it is inclined.