Device for supporting the practitioner

Abstract

The device according to the present invention serves to support a surgeon. The device (1) comprises a movable platform (3), a base (5) having a seat (7) extending from the platform (3), an upper body support device (9), and at least one actuation unit (15). The actuation unit (15) is located in the area (B) between the seat surface of the seat (7) and the platform (3) so that the surgeon's feet can reach the actuation unit (15). As a result, the feet, particularly the heels or soles, of a surgeon sitting on the seat (7) of the device (1) can easily reach the actuation unit (15) from any position.

Description

[Technical Field]

[0001] The present invention relates to a device for supporting a practitioner or surgeon, respectively, and in particular to a device for supporting the practitioner's body during a medical procedure such as a surgical procedure. [Background technology]

[0002] Support systems for practitioners or surgeons, respectively, such as operating or surgical chairs, are commonly known and serve to support the practitioner, usually standing in front of an operating table, so that medical operations, which often involve long, forced positions or which make particular demands on the practitioner's fine motor skills, can be performed without fatigue or in a fatigue-free manner, and ideally with high reliability and quality.

[0003] Patent Document 1 discloses an operating chair or surgical chair, respectively, that serves to support a surgeon. The surgeon can sit on the surgical chair during surgery. The surgical chair has a seat supported by height-adjustable columns, which stand on a joint device that defines two tilt axes of the columns, and the joint device is assigned to a locking device for locking the manually adjusted tilt position so that the columns maintain the desired tilt position. The columns extend from the upper side of an easy-to-walk platform, on which several foot-operated control switches are located that can lock and unlock the columns. The platform also serves as a platform on which the surgeon or surgeon places his or her feet during surgery. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] German Patent Invention No. 102020103861 Summary of the Invention [Problem to be solved by the invention]

[0005] In an operating room, the space available for the operating table and additional equipment, such as a surgical chair, is usually limited. This limits the dimensions of the operating chair and, therefore, the platform of the operating chair. In particular, the size of the area on the platform where the surgeon or surgeon can place their feet during surgery is limited. The operating chair must also be operable as close to the surgical area as possible to minimize the distance between the surgeon sitting on the operating chair and the surgical site and to provide the surgeon with a surgical position that is as comfortable as possible. The control switch can be configured, for example, as a foot pedal. The foot-operated control switch for operating the surgical chair is located in this limited area of ​​the platform, which can cause the surgeon to trip over the control switch when entering the platform and / or accidentally and / or mistakenly operate the control switch during surgery.

[0006] Based on this, it is an object of the present invention to provide an improved device for supporting a surgeon, which reduces the risk of the surgeon tripping or accidentally mishandling the device. [Means for solving the problem]

[0007] This object is realized and achieved by a device for supporting a practitioner (surgeon) according to claim 1.

[0008] The device according to the present invention comprises a platform from which extends a height-adjustable base column with an attached seat for the surgeon. The device further comprises an upper body support device with traction means, at the end of which a harness worn by the surgeon can be connected and disconnected. The device also comprises at least one actuation unit for controlling the base column and / or the upper body support device, which actuation unit is located in the area between the seat surface and the platform so that the surgeon's feet, preferably the heels or soles, can reach the actuation unit. The actuation unit is particularly ergonomic, as the surgeon's feet can reach the actuation unit without overstretching their feet or legs.

[0009] As a result, the actuation units for controlling the base column and / or the upper body support device are arranged in a space-saving manner on the platform, and in particular are not arranged in the front area of ​​the platform, where the practitioner (surgeon) can place his / her feet during medical operations (surgery). Thus, the platform can be configured only for the practitioner's feet to be placed, thereby reducing the risk of the practitioner tripping or operating incorrectly.

[0010] An important feature of the device according to the invention is in particular the fact that the actuation unit is located below the seat, which allows for a particularly ergonomic and intuitive operation of the actuation unit and does not take up much space on the platform, and the surgeon can, for example, kick his foot backwards with a relatively full movement so that the heel or sole reaches the actuation unit, without having to concentrate on the actuation process.

[0011] In particular, the actuation unit is arranged at least approximately perpendicular to the platform, which allows the actuation unit to have a large actuation surface that the practitioner can use to control the device. Thus, the practitioner can reach the actuation unit with their feet without having to concentrate on the actuation process. Furthermore, the platform can have a simpler design, for example by designing the top of the platform as a flat surface, which can make it easier to clean and / or disinfect the device before and after surgery.

[0012] The actuation unit may have several, preferably at least two, separately operable actuation elements that can be operated by the practitioner's feet. The actuation directions of the actuation elements of the actuation unit are preferably aligned parallel to each other and / or parallel to the surface of the platform.

[0013] The platform may have a trapezoidal or rectangular profile. In particular, the platform may also have a T-shaped profile, so that its narrow end can be advanced under the operating table, reducing the risk of collision with the columns supporting the operating table. The device preferably has an electric drive arranged below the platform. The device is preferably capable of moving along at least two directions of travel using the drive.

[0014] The adjustable base column can extend at least approximately perpendicular to the platform (in the basic position). For example, the adjustable base column can be height adjustable and / or pivotable laterally and / or pivotable forward and backward. The traction means of the upper body support device can be, for example, a belt, strap or (wire) rope.

[0015] The upper body support device may have a contact portion for the traction means, for example, an electric winch that can wind and unwind the traction means. Thus, by winding or unwinding the traction means on the winch, the length of the traction means can be changed by the upper body support device. When the end of the traction means is connected to a harness worn by the practitioner, the inclination angle at which the practitioner's upper body is supported can be adjusted by changing the length of the traction means. The practitioner's harness may be a practitioner upper body harness in which the connecting portion is located on the practitioner's back when the practitioner wears the harness.

[0016] In particular, the actuation unit is arranged in a region that extends at least approximately between the seat and the platform. The region in which the actuation unit is arranged is in particular truncated pyramidal in shape, with an upper surface defined by the height of the seat and a lower surface defined by the height of the platform, the centers of the upper and lower surfaces preferably being arranged perpendicular to each other. The upper and lower surfaces of the truncated pyramid can be formed, for example, as a polygon, a rectangle, a square, or a circle. If the seat is height-adjustable, the upper surface of the region is preferably defined at the height of the lowest possible height setting of the seat.

[0017] The upper surface of the area can be determined by a unit seating area, which is defined as an area that can accommodate the dimensions of an average surgeon's buttocks projected onto the unit seating area. For example, the unit seating area can be defined as a square with a width and length of at least approximately 0.4 m. If the unit seating area is defined as a circle, the diameter of the unit seating area can be at least approximately 0.4 m.

[0018] The bottom area of ​​the area may be determined by the unit standing area, which is defined as an area that can accommodate the shoulder dimensions of an average surgeon projected onto the unit standing area. For example, if the unit standing area is defined as a rectangle, the width of the unit standing area may be at least approximately 0.6 m, and the length thereof may be at least approximately 0.4 m. If the unit standing area is defined as a circle, the diameter of the unit standing area may be at least approximately 0.6 m. In particular, between the bottom of the truncated pyramid and the front of the platform is the surgeon's tread surface, on which the surgeon can place his or her feet, at least in part.

[0019] Preferably, the actuation unit, when actuated, switches the operating mode of the upper body support device and / or the base. For example, the base and / or the upper body support device may initially be in an operating mode in which the setting of the base and / or the upper body support device is locked. When actuated, the actuation unit may switch the operating mode of the base and / or the upper body support device to an operating mode in which the length of the traction means of the base or the upper body support device is movable, i.e., unlocked, thereby allowing the practitioner (surgeon) to adjust the device. When actuated again, the actuation unit may, for example, set the operating mode of the base and / or the upper body support device back to the locked state.

[0020] The platform has a front side that faces the surgical area during surgery, and the actuation unit is preferably positioned facing the front side, which allows the heel or sole of the surgeon to easily reach the actuation unit.

[0021] The upper side of the platform, particularly between the base and the front side of the platform, is provided with at least one tread surface for the surgeon's foot. The tread surface may, for example, be at least partially flat, on which the surgeon can place or rest his or her foot during surgery.

[0022] The actuation unit preferably has at least one actuation element having an actuation surface, where the actuation element is movable between a first position and a second position and is resiliently (spring-loaded) held in the first position. The actuation surface may be at least partially flat and / or at least partially concave. The actuation direction in which the actuation element is movable from the first position to the second position is preferably at least approximately horizontal. In particular, the actuation unit defines an actuation pivot axis along which the actuation element can pivot to actuate the actuation unit, the actuation pivot axis extending at least approximately parallel to the surface of the platform. The actuation pivot axis is preferably located below the surface of the platform, and the actuation unit is triggered regardless of the height of the actuation element at which the exerciser's foot contacts the actuation element when stepping back. The first position of the actuation element is preferably located closer to the tread surface than the second position of the actuation element.

[0023] Preferably, the actuation unit transmits a switching signal to the control device of the base mast and / or the upper body support device when the actuation element is in the second position.

[0024] In particular, the working surface of the working element is arranged at a predetermined angle to the tread surface. The predetermined angle between the working surface and the tread surface may be, for example, 100° to 45°, in particular 95° to 50°, preferably 90° to 60°, and particularly preferably at least approximately 90°. By arranging the working surface perpendicular to the tread surface, the foot of the surgeon, for example the heel or sole, can be more easily reached by the working unit.

[0025] The adjustable base is preferably pivotable at least laterally about a pivot axis. The base is preferably height adjustable.

[0026] The working surface of the actuation unit is preferably at least rectangular. This is the simplest possible design of the working surface. The height-to-width ratio of the working surface is in particular greater than 2:1, preferably greater than 3:1, particularly preferably greater than 4:1. In particular, the area of ​​the working surface is less than 0.06 m 2Above, especially 0.07m 2 That's all. The working surface is therefore made as large as possible so that it can be contacted as easily as possible by the practitioner's foot (surgeon's foot).

[0027] In an alternative embodiment, the actuation unit is attached to or integrated into the base. The base, and thus the actuation unit, is positioned at least approximately below the seat surface of the seat, but still within reach of the practitioner's feet, preferably the heels or soles. Thus, the platform of the device can be configured solely as a support surface for the practitioner's feet. Fixedly arranging and integrating the actuation unit into an adjustable base can also be advantageous, since the actuation unit is always fixed relative to the adjustable base. When the base is adjusted relative to the platform, for example, by pivoting the base laterally and / or pivoting the base back and forth, the position and / or orientation of the actuation unit also change with the base. This can further improve the operability of the actuation unit for the practitioner (surgeon).

[0028] In this embodiment, the height at which the actuation unit is positioned from the platform is in particular not more than one-third of the height of the truncated pyramid, preferably not more than one-quarter of the height of the truncated pyramid, particularly preferably not more than one-fifth of the height of the truncated pyramid.

[0029] The actuation surface of the actuation unit is in particular arranged at a distance from the platform, preferably greater than 0.05 m, in particular greater than 0.10 m, particularly preferably greater than 0.15 m, as a result of which the actuation unit can be particularly easily operated with the foot, and the practitioner can trigger the actuation unit and at the same time support his or her own weight, for example even in a strongly reclined position.

[0030] In a particular embodiment, the actuation unit has in particular at least two actuation elements, which are preferably arranged in the heel region of the practitioner's left and right legs, and which are designed so that they can be actuated independently of one another.

[0031] Further details of the advantages, further embodiments or details of the invention can be obtained from the drawings, the description and the claims. [Brief explanation of the drawings]

[0032] [Figure 1] FIG. 1 is a perspective view of a first embodiment of a device for supporting a practitioner according to the present invention. [Figure 2] FIG. 2 is a perspective view of a second embodiment of a device for supporting a practitioner according to the present invention. [Figure 3] FIG. 3 is a detailed view of the actuation unit according to the first embodiment. [Figure 4] FIG. 4 is a detailed view of the actuation unit according to the second embodiment. [Figure 5] FIG. 5 is a detailed view of the actuation unit according to the third embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0033] FIG. 1 shows a first embodiment of a device 1 for supporting a practitioner (surgeon). The device 1 features a walkable platform 3, under which a drive device 2 is located. The drive device 2 can have at least three, e.g., motorized, rollers. At least one of the three motorized rollers can be rotatable about a vertical axis. In FIG. 1, the drive device 2 has four motorized rollers, but only two of the four rollers, 4a and 4b, are shown in FIG. 1. In the drive device 2 shown in FIG. 1, at least two of the rollers are rotatable about a vertical axis. Thus, the device 1 can be driven to a desired position.

[0034] The apparatus 1 also includes a base 5 that extends at least approximately perpendicularly from the platform 3. The base 5 shown in Figure 1 is height adjustable and laterally pivotable. The lateral pivoting occurs about a lateral pivot axis S that is defined in a plane formed by the platform 3.

[0035] The device 1 of FIG. 1 also includes an upper body support device 9. In the example shown in FIG. 1, the upper body support device 9 is attached to the base column 5. Alternatively, the upper body support device 9 can also be arranged separately on the platform 3, for example, behind the base column 5. The upper body support device 9 includes a traction means Z, and an end 11 of the traction means Z can be connected and disconnected to a harness 13 worn by the practitioner. In the example shown in FIG. 1, the harness 13 also has a back plate 12 to which a suspension point of the harness 13 is attached. The back plate 12 of the harness 13 can also have a coupling connection portion, and the end 11 of the traction means Z includes a connection portion so that the end 11 of the traction means Z can be detachably connected to the harness 13. It is preferable that the coupling connection portion of the harness 13 and the connection portion of the end 11 of the traction means Z are complementary to each other.

[0036] The upper body support device 9 shown in FIG. 1 forms an abutment for the traction means Z, to which the upper body of the practitioner (surgeon) can be coupled. For this purpose, the upper body support device 9 includes, for example, an electric winch that can wind and unwind the traction means Z. The upper body support device 9 is preferably disposed behind the practitioner positioned within the apparatus 1 so that the practitioner can lean forward while the upper body is held in a specific position by the traction means. The practitioner can first set the tilt angle at which he or she is held and supported by controlling the length of the traction means.

[0037] A seat 7 on which a practitioner (surgeon) can sit is also attached to the base column 5. In the example shown in FIG. 1 , a longitudinal beam 6 is attached to the upper end of the base column 5, and the longitudinal beam 6 extends from the base column 5 toward the front side 19 of the platform 3. The longitudinal beam can be disposed at least approximately horizontally. The seat 7 on which a practitioner can sit is disposed at the front end of the longitudinal beam 6.

[0038] The device 1 has an operating unit 15 arranged in area B between the seat 7 and the platform 3, and the operating unit 15 is arranged perpendicular to the surface of the platform 3. Area B extends below the seat 7 from the seat toward the platform 3, and area B always extends rearward of the tread surface 17. Area B, where the operating unit 15 can be arranged, is a truncated pyramid with a square upper surface 30 and a rectangular bottom surface 29, and centers M29, M30 of the upper surface 30 and the bottom surface 29 are positioned perpendicular to each other. The upper surface is defined by the unit seating surface, and the bottom surface is defined by the unit standing surface.

[0039] In the example shown in Figure 1, the actuation unit 15 has two actuation elements 21a and 21b. Each of the actuation elements 21a and 21b has an actuation surface 23a and 23b, respectively. The actuation surfaces 23a and 23b are large. The length of the actuation surfaces 23a and 23b can correspond, for example, to at least half, one-third, or one-quarter of the height of the area B. Thus, the feet of a practitioner sitting on the seat 7 can reach the actuation surfaces 23a and 23b.

[0040] The platform 3 has a front side 19 and a rear side 20, with the front side 19 being the side that faces the surgical area during surgery. The base post 5 is disposed between the front side 19 and the rear side 20 of the platform 3. The base post 5 can be disposed, for example, at least approximately in the center of the platform. A tread surface 17 is formed on the upper side of the platform 3 between the front side 19 and the base post 5, and a surgeon can step on the tread surface 17 when entering the platform and place their feet on the tread surface 17 when sitting on the seat. The tread surface 17 provides the surgeon with a degree of support needed, for example, if the surgeon wishes to change the height of the base post or pivot the base post 5 laterally.

[0041] 1, actuation element 21a is assigned to the practitioner's right leg and actuation element 21b is assigned to the practitioner's left leg. Further actuation elements may be provided in actuation unit 15.

[0042] The actuation unit 15 is communicatively connected to the control device 8. A signal line 24 connects the actuation unit 15 to the control device 8. When one of the actuation surfaces 23a, 23b is actuated, the actuation unit 15 sends a switching signal to the control device 8. The control device 8 is also communicatively connected to the adjustable base 5 and the upper body support device 9. The connection between the control device 8 and the base 5 and the connection between the control device 8 and the upper body support device 9 can be configured separately, for example, via signal lines 25 and 26. Alternatively, the communication can also take place via a bus system.

[0043] In Figure 1, two additional support surfaces 18a and 18b are further attached to the front side 19 of the platform 3. The additional support surfaces 18a and 18b can be used as support surfaces for any foot pedals of the instrument. This means that the tread surface 17 is still free of foot pedals, and as a result, there is no risk of the practitioner (surgeon) tripping.

[0044] FIG. 2 shows a second embodiment of the device 1. The second embodiment differs from the first embodiment in that an actuation unit 15 for controlling the base 5 and the upper body support device 9 is attached to or integrated into the base 5. In the device 1 shown in FIG. 2, the actuation unit 15 is attached to the base 5. The actuation unit 15 is located at a predetermined distance D from the platform 3. Alternatively, the actuation unit 15 can also be integrated into the base 5. The actuation unit 15 is located in area B between the seat 7 and the platform 3 and is attached to the base 5 using a fixing element 31. Area B extends below the seat 7 from the seat toward the platform 3, and always extends rearward of the tread surface 17. Area B, in which the actuation unit 15 can be located, is a truncated pyramid with a square top surface 30 and a rectangular bottom surface 29, with the centers of the top surface 30 and the bottom surface 29 positioned perpendicular to each other. The height at which the actuation unit 15 is located from the platform 3 is approximately one-quarter of the height of the truncated pyramid in the example shown in FIG.

[0045] By attaching the actuation unit 15 to the base 5 or incorporating the actuation unit 15 into the base 5, the actuation unit 15 always maintains a constant relationship to the surgeon's own position, even if the base 5 is rotated at a large angle or has a large height setting. Thus, the surgeon can more easily find the actuation unit with his or her feet without being forced to look at where the actuation unit 15 is currently located.

[0046] 3 shows a cross-sectional view of an example of an actuation unit 15. In this example, the actuation unit 15 is attached to the platform 3 and oriented at least approximately perpendicular to the platform 3. On the side of the actuation unit 15 facing the front side 19 of the platform 3 are actuation elements 21a, 21b that are spring-loaded and held in a first position P1.

[0047] The actuating elements 21a, 21b can move from a first position P1 to a second position P2 against the spring force of a spring element 28. The spring element 28 can define a pressure for actuating the actuating elements 21a, 21b. The spring element 28 can be configured, for example, as a nonlinear compression spring. The first position P1 of the actuating elements 21a, 21b is defined by a stop surface 27 provided on the housing 16 of the actuating element 15. The actuating elements 21a, 21b have actuating surfaces 23a, 23b that the practitioner can press during actuation. The actuating elements 21a, 21b are provided with at least one hinge 32 defining an actuating axis X, about which the actuating elements 21a, 21b can pivot. In the illustrated example, the actuating axis X is located at the lower end of the actuating elements 21a, 21b. The actuating axis X extends at least approximately parallel to a surface 33 of the platform 3. However, the hinge 32 can also be located at the right end, left end or upper end of the actuation elements 21 a, 21 b. In the example shown in FIG. 3, the hinge 32 defining the actuation axis X is housed in a recess 34 below the surface 33 of the platform 3 and attached to the platform 3. This prevents the practitioner from accidentally hitting the hinge 32 with their foot rather than the actuation surfaces 23 a, 23 b, which would not trigger the actuation unit 15. In FIG. 3, a protective element 35 is also attached to the surface 33 of the platform 3 below the actuation surfaces 23 a, 23 b. The protective element 35 separates the actuation unit 15 from the tread surface 17.

[0048] 3, the working surfaces 23a, 23b are substantially perpendicular to the tread surface 17. The angle α between the tread surface 17 and the working surfaces 23a, 23b is approximately 90° when the working elements 21a, 21b are in the first position P1.

[0049] A switch element 10 is arranged in the actuation unit 15. The switch element 10 is attached to the platform 3 by a positioning element 22. The switch element 10 has an actuation pin 14 that rests against the backside of the actuation elements 21a, 21b. When the actuation elements 21a, 21b are pushed into the second position P2, the actuation pin 14 is pushed into the switch element 10. The switch element 10 is connected to the control device 8 via a signal line 24. When the actuation elements 21a, 21b are in the second position P2, the switch element 10 sends a switching signal to the control device 8. The control device 8 is communicatively connected to the base column 5 and the upper body support device 9 via signal lines 25, 26.

[0050] Contrary to what is shown in FIG. 3, the spring element 28 can also be arranged within the switch element 10 .

[0051] Figure 4 shows a cross-sectional view of a further example of an actuation unit 15. The example shown in Figure 4 corresponds to the example of Figure 3 in view of the reference numbers, but the actuation unit 15 is mounted on a base post 15.

[0052] 5 shows a cross-sectional view of a further example of an actuation unit 15. In this example, the actuation unit 15 is integrated into the base post 5. This means that the actuation unit 15 does not have a separate housing. Rather, the actuation unit 15 is housed in a housing 29 of the base post 5.

[0053] The features shown in Figures 3 to 5 can be combined.

[0054] The device according to the present invention serves to support a surgeon. The device 1 comprises a movable platform 3, a base 5 having a seat 7 protruding from the platform 3, an upper body support device 9, and at least one actuation unit 15. The actuation unit 15 is located in an area B between the seat surface of the seat 7 and the platform 3 so that the surgeon's feet can reach the actuation unit 15. As a result, the feet, particularly the heels or soles, of a surgeon sitting on the seat 7 of the device 1 can easily reach the actuation unit from any position. [Explanation of symbols]

[0055] 1 device 2. Drive unit 3. Platform 4a, 4b, 4c Electric rollers 5 Base Pillar 6 Longitudinal beams 7 Seat area 8 Control Device 9 Upper body support device 10 Switch Elements 11 End of towing means 12 Harness backboard 13 Harness 14 Actuation pin 15 Actuating Elements 16 Housing of actuating element 17 Tread surface 18a, 18b Support surface 19 Front of the platform 20 Rear of the platform 21a, 21b Actuating elements 22 Positioning Elements 23a, 23b working surface 24 Signal line from actuation unit to control device 25 Signal line from control unit to base pole 26 Signal line from control device to upper body support device 27 Stops of actuating elements 28 Spring Elements 29 Bottom 30 Top side 31 Fixed Elements 32 Hinge 33 Platform Surface 34 Platform recess B area D Distance between the operating unit and the platform H Main axis of pillar P1 1st position P2 2nd position S pivot axis X operating pivot Z Traction means α Angle between the working surface and the tread surface

Claims

1. A device (1) for supporting a practitioner, comprising: a platform (3) from which an adjustable base (5) projects, on which a seat (7) is mounted for the practitioner; an upper body support device (9) having at least one traction means (Z), the upper body support device (9) being capable of connecting and disconnecting a harness (13) worn by the practitioner at an end (11) of the traction means (Z); At least one actuation unit (15) for controlling the base (5) and / or the upper body support device (9) is arranged in the area (B) between the seat surface of the seat (7) and the platform (3) so that the feet of the practitioner can reach the actuation unit (15). Device (1).

2. The region (B) has a truncated pyramidal shape having an upper surface (30) defined by the height of the seat (7) and a bottom surface (29) defined by the height of the platform (3), and the centers (M29, M30) of the upper surface (30) and the bottom surface (29) are preferably arranged vertically to each other.

2. The device (1) according to claim 1.

3. The actuation unit (15) is substantially perpendicular to the platform (3).

3. Device (1) according to claim 1 or 2.

4. The platform (3) has at least one front side (19) facing the surgical area during surgery, and the actuation unit (15) is arranged facing the front side (19). A device (1) according to any one of claims 1 to 3.

5. The upper side of the platform (3) between the actuation unit (15) and the front side (19) of the platform (3) is provided with at least one tread surface (17) for the practitioner's feet.

5. The device (1) according to claim 4.

6. The actuation unit (15) includes at least one actuation element (21a, 21b) having an actuation surface (23a, 23b) movable between a first position (P1) and a second position (P2), and a spring held in the first position. A device (1) according to any one of claims 1 to 5.

7. The actuation unit (15) defines an actuation pivot axis (X) about which the actuation element (21) is pivotable, the actuation pivot axis (X) extending at least approximately parallel to the surface of the platform (3). A device (1) according to any one of claims 1 to 6.

8. The actuation pivot axis (X) is located below the surface of the platform (3).

8. The device (1) according to claim 7.

9. The actuation unit (15) comprises at least one actuation element (21a, 21b) having an actuation surface (23a, 23b) movable between a first position (P1) and a second position (P2), and a spring held in the first position; The first position (P1) is disposed closer to the tread surface (17) than the second position (P2).

6. The device (1) according to claim 5.

10. The actuation unit (15), when actuated, switches the operating mode of the base (5) and / or the upper body support device (9). A device (1) according to any one of claims 1 to 9.

11. The actuation unit (15) transmits a switching signal to the control device (8) of the base (5) and / or the upper body support device (9) when the actuation elements (21a, 21b) are in the second position (P2). A device (1) according to any one of claims 5 to 9.

12. The actuating surfaces (23a, 23b) of the actuating element (21) are disposed at a predetermined angle (α) with respect to the tread surface (17). Device (1) according to any one of claims 1 to 11, in particular claim 6.

13. The predetermined angle (α) between the working surfaces (23a, 23b) and the tread surface (17) is between 100° and 45°, particularly between 95° and 50°, and preferably between 90° and 60°. Device (1) according to any one of claims 1 to 12, in particular claim 9.

14. The base post (5) is laterally pivotable about a pivot axis (S). A device (1) according to any one of claims 1 to 13.

15. The actuation unit (15) is attached to or integrated into the base (5). A device (1) according to any one of claims 1 to 14.

16. The working surface (23) is substantially rectangular, and preferably the height to width ratio of the working surface (23) is greater than 2:1, preferably greater than 3:1, particularly preferably greater than 4:

1. Device (1) according to any one of claims 1 to 15, in particular claim 6.

17. The area of ​​the working surface (23) is 0.06 m ２ More than 0.07m, preferably 0.07m ２ That's all Device (1) according to any one of claims 1 to 16, in particular claim 6.

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