Retention system for an operator and method for retaining an operator - Patents.com

Abstract

The support system (1) comprises a support device (10) for holding at least one body part of an operator and a release device (13) and serves to hold at least one body part of the operator in an adjustable position. The support device (10) has a control unit (12) designed to switch the support device (10) between a moving mode (B) and a holding mode (H), where the supported body part of the operator can move at least in an adjustment direction in the moving mode (B) and is held in the holding mode (H) in a position and / or orientation by the support unit. The control unit (12) is designed to switch the support device (10) from the moving mode (B) to the holding mode (H) when the supported body part of the operator remains at least substantially in a constant position and / or orientation for a predetermined time.

Description

[Technical field]

[0001] The present invention relates to a holding system for an operator in surgery as well as a holding system for, for example, laboratory personnel or dentists. [Background technology]

[0002] Support systems for operators, such as work chairs with or without armrests or footrests for the operator, are already known and generally serve to support an operator who normally stands at an operating table in such a support manner that the operator can carry out long operations, operations in forced positions and / or operations with special requirements for fine motor skills with or without reduced fatigue and, in the ideal case, can perform fine motor skills reliably and with high quality.

[0003] The operating chair is usually configured to be adjustable so as to suit the needs of the operator during the operation. For example, from DE 102020103861 C1 a operating chair is known which can be pivotally adjusted in height as well as laterally and fore-aft.

[0004] German utility model no. 202018102964 describes a height-adjustable work chair with two foot pedals, whereby adjustment of the work chair height by an operator sitting on the operator chair can be performed by means of the foot pedals. Furthermore, the work chair can store the adjusted height and return to the stored height upon restart.

[0005] Furthermore, a work chair with restrainable hinge arms is disclosed in EP 0 868 885 A1, which is arranged to support the arms of an operator sitting on the chair. The operator can adjust the inclination of the retaining arms by means of a foot pedal. When the operator activates the foot pedal, hydraulic oil is pumped by the hydraulic pump into the cylinder chamber, which causes a piston to be pulled against a spring element, releasing the rotation of the hinge arms. As soon as the operator releases his foot from the foot pedal, the hydraulic pump stops, which causes the spring element to push the piston back, blocking the hinge arms.

[0006] Furthermore, a working chair arranged on a drivable platform for use in laparoscopic surgery is described in US Patent Application Publication No. 2016 / 0000631. The working chair comprises a seat supported by a column, and a chest support at the front of the seat comprises a number of adjustable support pads. The chest support can be adjusted to achieve the most ergonomic sitting position for the operator. Thereby, for the adjustment of the sitting position, inputs must be made to the system before the operation regarding the position of the patient to be operated on, biometric information about the operator, and the desired position of the operator, e.g. seat height, seat inclination, or the desired height of the footrest above the platform. Based on this information, the working chair is then calibrated. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] German Patent Invention No. 102020103861 [Patent Document 2] German Utility Model No. 202018102964 [Patent Document 3] European Patent Application Publication No. 0868885 [Patent Document 4] US Patent Application Publication No. 2016 / 0000631 Summary of the Invention [Problem to be solved by the invention]

[0008] During surgery, it may happen that the operator frequently changes his position relative to the patient, which requires the operator to readjust the chair accordingly.

[0009] Since adjustment by foot can lead to incorrect adjustment of the work chair if the number of operating elements is large, manual adjustment is natural given the increasing number of functions and adjustability of the work chair, and also adjustment by means of an operating device that the operator can operate manually.

[0010] However, when the operating chair is manually adjusted, the operator must place the surgical instruments in his hands, and therefore must interrupt the operation process. The operator can continue the operation only after the operating chair is adjusted. Therefore, the operator is taken away from the operation process by the manual adjustment of the operating chair. In an operation that requires a large number of such position changes of the operator, the operation is prolonged.

[0011] Starting from that, it is an object of the present invention to provide a system and method by which the operator's body can be held in a large number of different positions which can be adjusted as simply and intuitively as possible. [Means for solving the problem]

[0012] This object is solved by a holding system for an operator according to claim 1.

[0013] The support system according to the invention comprises a support device for holding at least a body part of an operator and a release device. In particular, the support device is configured to hold at least a body part, such as an arm, one or both legs, the upper body or the whole body. The support device comprises a control device configured to switch the support device between a moving mode and a holding mode, such that a supported body part of the operator is movable in at least one adjustment direction in the moving mode and is held in the holding mode in a position and / or orientation by the support device. The adjustment direction can be, for example, the seat height of the operator, the lateral tilt angle or the upper body tilt angle of the seated operator. The release device is communicatively connected to the control device and configured to switch the support device from the holding mode to the moving mode, in particular when a respective signal is received from the release device. The control device is configured to switch the support device from the moving mode to the holding mode when the supported body part of the operator assumes a substantially constant position and / or orientation during a predefined time. The predefined time can be, for example, in the range of 0.5 to 4 seconds, preferably 1 to 3 seconds, preferably 2 to 3 seconds or at least 5 seconds. The predefined time during which the operator's body part must remain stationary in a constant position, at which the control device switches from the moving mode to the holding mode, can be adjusted to a period that the operator considers comfortable. The supported body part of the operator in particular assumes an at least substantially constant position when the moving speed of the body part in the adjusting direction is about 0 m / s, i.e. within a tolerance range centered on the value 0 m / s. The limits of the tolerance range can be, for example, ±0.2 m / s, ±0.1 m / s or ±0.05 m / s. In addition, the limits of the tolerance range can be adjusted with the time that the operator considers comfortable.

[0014] By activating the release device, the operator can switch the support device from the holding mode to the moving mode and move the supported body part in the adjustment direction. As soon as the operator is satisfied with the position of the supported body part, he can rest in this position. The control device detects that the supported body part of the operator is resting in a certain position and switches from the moving mode to the holding mode. This allows a particularly direct and intuitive operation of the support device by the operator's body movements. Also, complex operating units for adjusting the support device can be omitted, whereby the risk of incorrect operation of the support device is reduced. In the moving mode, the operator can take the desired position and / or orientation that is set after the end of a short time during which the operator is resting in this position. The simple adjustment of the position of the operator, held in the holding mode by the support device, makes time-consuming repositioning of the support device unnecessary. The operator can thus concentrate on the operation and is less distracted by the operation of the holding system. In this way, the operation can be performed in a short time and with potentially high quality.

[0015] A particularity of the support system of the present invention is a control device that switches the support device from a moving mode to a holding mode when the supported body part of the operator remains stationary in one position for a pre-set time.

[0016] During and / or after the release of the transfer mode, the control device may further generate an acoustic and / or optical signal to indicate to the operator the release of the transfer mode. A pre-set delay time may further be provided between the release of the transfer mode and the switching of the support device from the holding mode to the transfer mode. This is particularly advantageous when the operator is in a position that would make him unstable in the transfer mode. The delay time may be adjustable and may be, for example, at least 3 seconds, 2 seconds, 1 second, 0.5 seconds or 0.3 seconds.

[0017] Preferably, the support device comprises a sensor unit for detecting a movement of the supported body part, and the control device is configured to receive sensor data from the sensor unit and switch the support device from a moving mode to a holding mode based on the sensor data. The sensor unit allows the control device to determine whether the supported body part of the operator moves any further based on the sensor data. The sensor unit can detect the movement of the supported body part directly or indirectly based on the movement of individual parts, such as struts, rods or hinges of the support device. The sensor unit can comprise, for example, a pressure sensor at the lateral support or at another location. For example, the sensor unit can also comprise a separate position sensor attached to the piston rod of an occludable gas pressure spring supporting the height adjustment of the work chair. However, the sensor unit can also comprise a sensor or circuit arranged in an actuator that monitors the actuator, for example, provided for the supported movement of the part of the support device, in that, for example, the motor current of the actuator and / or the voltage applied to the actuator are detected and evaluated.

[0018] The release device preferably comprises at least one operating element for releasing the travel mode. For example, the operating element may comprise an electric switch, an electric button or a light barrier, or an inductive or capacitive sensor. The operating element of the release device is preferably arranged in the foot area of ​​the operator seated in the working chair, so that the operator can release the travel mode by a foot movement. The operating element preferably comprises a light barrier.

[0019] The release device is preferably arranged in such a way that the operating element is reachable by the operator at least with his feet, so that the operator can switch the support device from the holding mode to the transfer mode and from the transfer mode to the holding mode without using his hands.

[0020] In a particular embodiment, the release device preferably comprises at least two operating elements that are assigned to different adjustment directions of the support device in the travel mode. For example, the first operating element can be arranged so that the operator reaches the first operating element with his right foot. For example, the first operating element can be configured to release the adjustment of the height and / or the lateral pivot angle of the work chair. For example, the second operating element can be arranged so that the operator reaches the second operating element with his left foot. For example, the second operating element can be configured to release the travel mode for the adjustment of the upper body tilt angle of the operator. For example, the work chair can comprise a base support that can be configured to be height-specifically adjustable and laterally pivotable. Additional support elements can be attached to the base support, such as an upper body support device, at least one, preferably several lateral supports and / or armrests, and a seat. The additional support element is preferably attached to the upper end of the base support.

[0021] In particular, the support device comprises at least one actuator configured to move the support device in at least one adjustment direction in the holding mode and / or in the movement mode. For example, the at least one actuator can be an actuator that presses a release pin of a gas pressure spring in the movement mode. The actuator can further comprise, for example, one or more electric servo motors configured to move a part of the support device.

[0022] In one embodiment, the support device comprises a work chair having a seat and a first adjustment device for adjusting the seat height. An operator can sit on the seat during surgery. Preferably, the sensor unit comprises at least one sensor element located in the first adjustment device, whereby the sensor element is configured to detect the seat height.

[0023] Preferably, the first adjusting device is configured to support the movement of the operator in the movement mode by a force, whereby the supporting force counteracts the gravity of the supported body part of the operator. For example, the first adjusting device can comprise a closable gas pressure spring or a jack screw driven by an electric motor.

[0024] The working chair in particular comprises a second adjustment device for adjusting the lateral inclination of the seat, at least one lateral support and at least one force sensor unit arranged on the lateral support for detecting a lateral force acting on the lateral support. Preferably, the lateral support extends laterally adjacent to the seat of the working chair. The force sensor unit is preferably arranged on the inside of the lateral support facing the seat, thereby detecting, for example, a force with which the upper body of an operator seated on the seat presses laterally against the lateral support when the operator moves his or her upper body laterally. Thus, the sensor signal of the force sensor unit can be used to detect the lateral movement of the operator.

[0025] Preferably, the second adjusting device is configured to adjust the lateral inclination angle of the work chair based on the sensor signal of the force sensor unit. In this way, the operator can adjust the desired lateral inclination angle of the work chair as simply and intuitively as possible using his upper body in that he displaces his body weight so that his upper body presses against the lateral support. Preferably, the work chair comprises an additional lateral support with at least one additional force sensor unit arranged on the additional lateral support for detecting a force acting laterally on the additional lateral support. The additional lateral support preferably also extends laterally to the side of the seat of the work chair on the opposite side of the work chair. The additional force sensor unit is preferably arranged inside the additional lateral support facing the seat, whereby the additional force sensor unit detects the force with which the upper body of the operator seated on the seat presses laterally against the additional lateral support. Furthermore, a force variation, such as a force reduction, can be detected in order to start the installation of the work chair. When the operator presses his upper body against the force sensor unit of the lateral support located on the right side, the second adjusting device pivots the work chair to the right, whereas when the operator presses his upper body against the additional force sensor unit of the additional lateral support located on the left side, the second adjusting device pivots the work chair to the left.

[0026] Preferably, the control device is configured to switch the second adjusting device from the moving mode to the holding mode when the sensor signals of the force sensor units are at least substantially 0 N for a predetermined time. If the additional force sensor unit is located at the additional lateral support, the control unit is configured to switch the second adjusting device from the moving mode to the holding mode when the sensor signals of both force sensor units are at least substantially 0 N for a predetermined time.

[0027] In another embodiment, the work chair comprises an upper body retaining device with traction means, which is releasably connectable to a back part of a harness that may be worn by the operator. The traction means is preferably a belt, a wire rope with or without coating, etc. The upper body retaining device is preferably arranged such that in the retaining mode the upper body of the operator is held at an inclined angle. The upper body retaining device is preferably arranged behind the work chair, for example at shoulder height of the operator sitting in the work chair. The upper body retaining device is particularly configured to keep the traction means tight also in the transfer mode, so that the traction means cannot come loose and the risk of injury to the operator and / or bystanders therewith may be reduced.

[0028] Additionally or alternatively, the control device can be configured to switch the upper body holding device into a hover mode, the upper body holding device being configured to apply a traction force to the upper body of the operator in the hover mode via the traction means and the harness. The traction force supports the operator's tilting of his upper body. For example, upon activation of the release device, the control device can be configured to activate the hover mode of the upper body holding device for a predetermined period of time. For example, in this way, the operator can keep pressing the operating element for a predetermined period of time, such as 0.5 seconds, 1 second, or 1.5 seconds. If the operating element comprises a light barrier, the operator can release his feet for a predetermined period of time within the release range of the light barrier and activate the hover mode with his feet accordingly. The operator can move freely according to the operating requirements, without having to repeatedly activate the operating unit for changes in position and / or direction, but with a permanently applied reset force that is perceived by the operator as a slight resistance. The operator can move directly in the hover mode in this way without having to put down the implement, and the operator is nevertheless released or supported to some extent. The reset force can be, for example, 60%, 70%, 80%, 90% of the gravity of the supported body part.

[0029] Preferably, the control device is configured to switch the support device when the release device is repeatedly actuated from the hover mode to the hold mode, such that an operator can stop the hover mode by repeated actuation of the release device.

[0030] For example, the upper body support device can comprise an electrically driven winch around which the towing means is wound or wound on. The electric drive of the winch for the towing means can in particular be controlled to drive the winch with an approximately constant torque in the winding direction, whereby an approximately constant traction force is applied to the towing means. The electrically driven winch is preferably equipped with a gear with a variable speed ratio, whereby the winch is configured, for example, in an automatic locking manner.

[0031] This object is also solved by a method for retaining an operator according to claim 14.

[0032] The method according to the present invention comprises the following steps: holding at least one supported body part of the operator in a position and / or orientation; releasing a movement mode in which the supported body part of the operator may move at least in the adjustment direction; and switching from the movement mode to a holding mode when the supported body part of the operator assumes at least a substantially constant position and / or orientation for a predetermined time.

[0033] Preferably, in the hold mode, release of the movement mode can be performed by the foot.

[0034] All the features and advantages explained in connection with the retention system according to the invention are equally applicable to the method according to the invention.

[0035] Further details of advantageous embodiments or specifications of the invention can be derived from the drawings, the description and the dependent claims. [Brief description of the drawings]

[0036] [Figure 1] FIG. 1 is a schematic three-dimensional view of an embodiment of a retention system according to the invention; [Diagram 2] FIG. 1 is a schematic block diagram of one embodiment of a retention system. [Diagram 3] FIG. 13 is a schematic block diagram of another embodiment of a retention system. [Figure 4] FIG. 13 is a schematic block diagram of another embodiment of a retention system. [Diagram 5] 1 is a flow diagram of an embodiment of a method according to the present invention. [Figure 6] FIG. 13 is an example of sensor data during adjustment of the support system in a movement mode. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0037] FIG. 1 shows an embodiment of a support system 1 that serves to support an operator in a seated position, the operator's upper body being supported by a harness 23 having a backrest portion 4 that the operator may wear.

[0038] The support system 1 comprises a support device 10 with a height-adjustable and laterally pivotable work chair 18. The work chair comprises a seat part 15 and an upper body support device 22 with a traction means Z. An operator can sit on the seat part 15. Before the operator sits on the work chair 18, the operator can wear a harness 23 with a backrest part 4, which can be releasably coupled with the traction means Z of the upper body support device 22. The operator can thus lean forward, whereby the upper body of the operator is held by the traction means Z. The adjusted length L_Z of the traction means Z between the upper body support device 22 and the backrest part 4 of the harness 23 thereby determines the inclination angle of the upper body of the operator.

[0039] The support device 10 shown in Fig. 1 is further arranged on a drivable platform 2 with two foot rests 3, on which an operator can place his feet during operation. The foot rests 3 can further serve as a support for foot pedals for the operation of an instrument, such as a surgical instrument.

[0040] The task chair 18 comprises a first adjustment device 16 and a second adjustment device 19 .

[0041] In this example, the first adjusting device 16 comprises a closeable gas pressure spring and a sensor element 17 is located in the first adjusting device 16, which detects the seat height, i.e. the height of the seat 15 above the platform 2.

[0042] The second adjustment device 19 in this example comprises two linear drives (only the front one is shown) each arranged laterally adjacent to the work chair 18. The two linear drives are attached to the work chair 18 and to the platform 2 in such a way that a length change of the linear drives results in a pivoting movement of the work chair. The linear drives are operated to move in the opposite direction such that in the case of a positive length change of one linear drive the other linear drive performs a negative length change.

[0043] Above the seat 15, the support device 10 comprises a lateral support 20 and an additional lateral support 26 extending laterally adjacent to the seat. A force sensor unit 29 is located in the lateral support 20 on the inner side 5 of the lateral support 20 facing the seat, whereby the force sensor unit 21 detects the force with which the upper body of an operator seated on the seat 15 presses laterally against the lateral support 20. Similarly, an additional force sensor unit 27 is located in the additional lateral support 26.

[0044] Between the two lateral supports 20, 26 behind the seat 15, an upper body support system 22 further extends in the vertical direction compressing the mast 24. The upper body support device 22 comprises a traction means Z which can be attached to the backrest 4 of a harness 23 which the operator can wear on his upper body. The traction means Z of the upper body support device 22 can be wound or unwound, whereby the inclination angle of the operator's upper body can be adjusted via the length L_Z of the traction means Z. Furthermore, the upper body support device 22 comprises an adjustment means which can define the position at which the traction means Z exits the upper body support device 22. The adjustment means can, for example, be adjusted and / or fixed in position in an infinitely or discrete stepwise manner. In this way, the upper body support device 22 can be adapted to the height of the operator. The upper body support device 22 can preferably be adjusted so that the position at which the traction means Z exits the upper body support device 22 behind the operator seated on the seat is located at least at the height of the operator's shoulders.

[0045] The support device 10 further comprises a control device 12 configured to switch individual actuators of the support device 10 between a movement mode B and a holding mode H. In the movement mode B, the supported body part of the operator can be moved in an adjustment direction.

[0046] The support device 10 further comprises a release device 13 communicatively connected to the control device 12. The release device 13 is arranged on the upper side of the platform 2. The release device 13 comprises in this embodiment two operating elements 14, namely a first foot-operated element 6 and a second foot-operated element 7. The foot-operated elements 6 and 7 are provided on their upper sides with release areas for detecting the feet of the operator. The operating elements 14 and the release device 13 are arranged below the seat 15 between the footrest 3 and the working chair 18.

[0047] The first foot-operated element 6 can be reached by the operator's right foot and the second foot-operated element 7 can be reached by the operator's left foot. The release device 13 can also comprise one or more light barriers that define the range within which the operator's feet can be detected.

[0048] The control device 12 is configured to switch the support device 10 from the holding mode H to the moving mode B when the release device 13 is activated. After activating the release device 13 again, the control device 12 switches the support device 10 back from the moving mode B to the holding mode H again.

[0049] In this example, the first foot operating element 6 is assigned to the deactivation of the movement mode B of the first adjusting device 16 and the second adjusting device 19. However, the second foot operating element 7 is assigned to the deactivation of the movement mode B of the upper body supporting device 22.

[0050] For example, the release device 13 may be provided with an additional foot-operated element so that the release of the movement mode B of the first adjusting device 16 and the second adjusting device 19 can be assigned to a separate foot-operated element.

[0051] A block diagram of one embodiment of the support system 1 is shown in Fig. 2. The support device 10 comprises a task chair 18 having a seat 15 and a first adjustment device 16 having at least one actuator 25a. The actuator 25a comprises a drive 8a configured to generate a movement and / or force of the first adjustment device 16.

[0052] In this example, the support device 10 further comprises a sensor unit 17 configured to detect a measured parameter of the drive 8a. Such a measured parameter may for example be a position, an angular position, a velocity, an angular velocity, an acceleration, an angular acceleration, a force or a torque of the drive 8a.

[0053] The sensor unit 17 is communicatively connected to the control device 12, whereby the control device 12 is configured to receive and evaluate the sensor data D of the sensor unit 17. Furthermore, the control device 12 is connected to a release device 13 having at least one operating element 14. The control device 12 is configured to receive a release signal from the release device 13 when the operating element 14 is actuated. When the control device 12 receives a release signal from the release device 13, the control device 12 switches the mode in which the actuator 25a operates. Thereby, when the actuator 25a is operated until the holding mode H is reached, the control device 12 switches to the movement mode B. In the movement mode B, the actuator 25a is controlled such that the operator can at least move the first adjusting device 16 in the adjustment direction. If the first adjusting device 16 comprises, for example, a gas pressure spring and is configured to adjust the height of the work chair, the actuator 25a can be configured to press a release pin of the gas pressure spring, for example, in order to transfer the gas pressure spring to the movement mode B. When the control device 12 determines that the height of the work chair 18 remains at least substantially constant for a predetermined time I, it switches from the transfer mode B to the hold mode H.

[0054] FIG. 3 shows another embodiment of the support system 1. In the embodiment shown in FIG. 3, the above description applies accordingly on the basis of the already explained reference numbers. In addition, in this embodiment, the work chair 18 comprises a second adjustment device 19 comprising two actuators 25b, 25c each with one drive 8b, 8c. The control device 12 is connected to a force sensor unit 21 located on the lateral support 20 and to an additional force sensor unit 27 located on the additional lateral support 26. If the second adjustment device 19 is operated in the support mode H, the actuators 25b, 25c remain in their actual positions. Now, if the control device 12 receives a release signal from the release device 13, the control device 12 is configured to switch the second adjustment device 19 to the movement mode B. The actuators 25b, 25c are controlled on the basis of the sensor data D of the force sensor units 21, 27. When both force sensor units 21, 27 transmit measurements of at least substantially 0N to the control device 12 for a predefined time I, the control device 12 switches from the movement mode B to the holding mode H.

[0055] Another embodiment is shown in Fig. 4. The above description also applies to this embodiment. In addition, in this example, the support device 10 with the working chair 18 comprises an upper body support device 22. The control device 12 can be configured in this embodiment to directly determine the position of the actuator due to the actuator motor current and / or the voltage applied to the actuator 25d. Additionally or alternatively, the actuator 25d can comprise a stepper motor or a servo motor with an angle sensor 9. Both options are shown in Fig. 4 with dashed lines.

[0056] 5 is a flow diagram of the inventive method for holding an operator. The support device 10 of the holding system 1 is initially in holding mode H. In this step, the supported body part of the operator is held in a position and / or orientation. In step V1, the movement mode B is now released and the supported body part of the operator can be moved in an adjusting direction. If the movement mode B is not released, the holding system 1 further remains in the holding mode H. If the support device 10 of the holding system 1 is in the movement mode B and the state change is released by the operator (method step V1), the support device 10 is switched from the movement mode B to the holding mode H.

[0057] If during a predetermined time I the supported body part of the operator assumes at least a substantially constant position and / or orientation, the support device 2 is returned from the moving mode B to the holding mode H by the control device 12 in a second method step V2.

[0058] The support system 1 for an operator that has been described so far works as follows: To execute the operating support system 1, it is driven to the operating table by an operating unit, not shown, whereby the operating unit can comprise, for example, at least one operating lever and additional control buttons or other control elements. The operator puts on the harness 23 with the backrest part 4, enters the platform 2 and sits on the seat part 15 of the working chair 18. The backrest part 4 and the traction means Z are mechanically releasably connected to each other before or after sitting down.

[0059] A first connecting element is attached to the backrest part 4, which is complementary to a second connecting element attached to the end of the traction means Z. The first and second connecting elements are preferably provided with magnet elements so that they move towards each other in a pretensioned position while the first and second connecting elements connect to each other. In the pretensioned position, both connecting elements can be manually pressed into a latched position in which the two connecting elements releasably connect the traction means Z to the backrest part 26 of the harness 25. If the operator first puts on the harness 25 and then puts on a preferably sterile surgical gown with a rear opening, another person can connect the first connecting element to the second connecting element under the surgical gown without having to see both connecting elements. This speeds up the pre-operative process.

[0060] The support device 10, i.e., the height adjustable and laterally pivotable task chair 18 and the upper body support device 22, is initially in the support mode H.

[0061] FIG. 6 shows an example of sensor data D over time t, where the top row exemplarily shows sensor data D of the sensor unit 17 relating to the seat height, the middle row exemplarily shows sensor data D of the force sensor units 21, 27, and the bottom row exemplarily shows the length L_Z of the traction means between the backrest portion 4 and the upper body holding device 22.

[0062] The first adjusting device 16 is initially in the holding mode H. Here, the release device 13 for the first adjusting device 16 is released by the operator by actuating the operating element 14 with his foot (method step V1). The first adjusting device 16 is switched to the moving mode B so that the operator can adjust the height P_H of the work chair 18 by loading and unloading the seat 15 of the work chair 18 with his foot. During the adjustment of the height of the seat 15, the height P_H is detected by the sensor unit 17 and transmitted to the control device 12. As soon as the detected height P_H remains at least substantially constant over a predefined time I, the control device 12 switches the first adjusting device 16 from the moving mode B to the holding mode H (method step V2).

[0063] 6, the process previously described for the first adjusting device is now described for the second adjusting device 19. The sensor data D used for the control of the second adjusting device 19 are the force sensor units 21, 27 in the lateral supports 20, 26.

[0064] The second adjusting device 19 is also in the holding mode H. By releasing the release device 13 in method step V1, the second adjusting device 19 is switched from the holding mode H to the moving mode B by the control device 12. In this example, the operator first presses his upper body against the force sensor unit 21 in the right lateral support 20. The force acting on the lateral support 20 is detected by the force sensor unit 21. The force sensor unit 21 transmits a respective force signal F_R to the control device 12. The operator then presses his upper body against the force sensor unit 27 located in the left lateral support 26, thereby transferring the force signal F_L to the control device 12. The control device 12 is configured to evaluate the force signals F_R and F_L and to switch from the moving mode B to the holding mode H (method step V2) as soon as the force signals F_R, F_L have at least substantially the value 0N for a predefined time I.

[0065] In the bottom part of Fig. 6 the procedure described above is explained in relation to the upper body holding device 22. Here too, starting from the holding mode H in method step V1, the movement mode B of the upper body holding device 22 is released. Now the operator can change the inclination of his upper body, whereby the length L_Z of the traction means Z changes accordingly. In the upper body holding device 22 respective sensor units 22 are located which are configured to detect the length L_Z of the traction means Z. The sensor units 11 transmit respective sensor signals to the control device 12 which is configured to evaluate the sensor signals. As soon as the control device 12 detects that the change in the length L_Z of the traction means Z has at least substantially stopped changing, the upper body holding device 22 is switched from the movement mode B to the holding mode H (method step V2).

[0066] The support system 1 according to the invention, comprising a support device 10 for holding at least one body part of an operator and a release device 13, serves to hold at least a body part of an operator in an adjustable position and / or orientation. The support device 10 comprises a control device 12 configured to switch the support device 10 between a movement mode B and a holding mode H, in which the supported body part of the operator can be moved in at least one adjustable direction in the movement mode B and is held in its actual position by the support device in the holding mode H. If the supported body part of the operator remains at least substantially in a constant position for a predefined time, the control device 12 is configured to switch the support device 10 from the movement mode B to the holding mode H. This allows a particularly direct and intuitive operation of the support device by the operator's body movements. The operator can assume a position and / or orientation in the movement mode that is set after the end of a short time during which the operator remains in this position. [Explanation of symbols]

[0067] 1 Retention System 2. Platform 3 Footrest 4 Backrest 5. Inside of the lateral support part facing the seat part 6 First foot-operated element 7 Second Foot-Operated Element 8a..., 8d Actuator drive unit 9 Position Sensors 10 Supporting Devices 11 Sensor unit 12 Control Devices 13 Release Device 14 Operational elements 15 Seat area 16 First Regulating Device 17 Additional inner side of additional lateral support facing the seat 18 Work Chair 19 Second Adjustment Device 20 Lateral support 21 Force sensor unit 22 Upper body support device 23 Harness 24 Mast 25a…, 25d Actuator 26 Additional lateral support 27 Additional Force Sensor Units B. Movement Mode D Sensor Data F_R Force signal of the force sensor unit of the right lateral support F_L Force signal of the force sensor unit of the left lateral support H Hold Mode I Scheduled Time L_Z Length of towing vehicle P Actual position P_H Seat height S Hover Mode t time V1 Holding at least one supported body part of the surgeon in a holding mode Enter V2 travel mode V3 Switching from Move to Hold mode

Claims

1. A support system (1) for an operator, comprising: a support device (10) for holding at least one body part of the operator, the support device (10) comprising a control device (12) configured to switch the support device (10) between a movement mode (B) and a holding mode (H), wherein the supported body part of the operator can move in an adjustment direction in the movement mode (B) and is held in the holding mode (H) in a position (P) and / or orientation by the support device (10), a release device (13) communicatively connected to said control device (12) and configured to switch said support device (10) from said holding mode (H) to said moving mode (B), the control device (12) is configured to switch the support device (10) from the moving mode (B) to the holding mode (H) when the supported body part of the operator assumes at least a substantially constant position and / or orientation over a predetermined time (I). Retention system (1).

2. characterised in that the support device (10) comprises a sensor unit (11) for detecting a movement of the supported body part, and the control device (12) is configured to receive sensor data (D) from the sensor unit (11) and to switch the support device (10) from the moving mode (B) to the holding mode (H) based on the sensor data (D). A retention system (1) according to claim 1.

3. characterised in that the release device (13) comprises at least one operating element for releasing the movement mode (B), A retention system (1) according to claim 1 or 2.

4. characterised in that the release device (13) is arranged such that the operator can reach the operating element (14) at least with his foot. A retention system (1) according to any one of claims 1 to 3.

5. The support device (10) is provided with at least one actuator (25a) configured to move the support device (10) in at least one adjustment direction in the holding mode (H) and / or in the moving mode (B). . . . , 25d), A retaining system (1) according to any one of claims 1 to 4.

6. characterised in that the support device (10) comprises a task chair having a seat (15) and a first adjustment device (16) for adjusting the seat height, A retaining system (1) according to any one of the preceding claims.

7. characterised in that the sensor unit (11) comprises at least one sensor element (17) located in the first adjusting device (16), the sensor element (17) being configured to detect a seat height, A retention system (1) according to claim 6.

8. the first adjusting device (16) is configured to support the movement of the operator by a force (F_H) in the movement mode (B), A retention system (1) according to claim 6 or 7.

9. characterised in that the work chair (18) comprises a second adjusting device (19) for adjusting the lateral inclination of the seat, at least one lateral support (20) and at least one force sensor unit (21) arranged on the lateral support (20) for detecting lateral forces acting on the lateral support (20), A retention system (1) according to any one of claims 6 to 8.

10. the second adjusting device (19) is configured to adjust the lateral tilt angle of the working chair (18) in the movement mode (B) based on a sensor signal of the force sensor unit (21); characterised in that the control device is configured to switch the second adjusting device (19) from the moving mode (B) to the holding mode (H) if the sensor signal of the force sensor unit (21) is at least substantially 0N for the predetermined time (I). A retention system (1) according to claim 9.

11. the work chair (18) comprises an upper body support device (22) having a traction means (Z), the traction means (Z) being releasably attachable to a backrest portion (4) of a harness (23) which may be worn by the operator; the upper body support device (22) is arranged such that in the support mode (H) the upper body of the operator is supported at an inclined angle. A retaining system (1) according to any one of claims 6 to 10.

12. characterised in that in the case of release of the release device (13), the control device (12) is configured to switch the upper body holding device (22) to a hover mode (S) for a predetermined time, and the upper body holding device (22) is configured to apply a traction force (F_Z) to the upper body of the operator via the traction means (Z) and the harness (23) in the hover mode (S). A retention system (1) according to claim 11.

13. characterised in that, when the release device (13) is released again, the control device (12) is configured to switch from the hover mode (S) to the hold mode (H). A retention system (1) according to claim 12.

14. A method for holding an operator by means of a holding system (1) in particular according to any one of claims 1 to 13, said method comprising: - holding (H) at least one supported body part of said operator in a position (P) and / or orientation; - a step (V1) of disabling a movement mode (B) in which the supported body part of the operator can be moved in at least one adjustment direction; - a step (V2) of switching from said movement mode (B) to said holding mode (H) when said supported body part of said operator assumes an at least substantially constant position and / or orientation over a predetermined time (I), method.

15. In the holding mode (H), the release (V1) of the moving mode (B) can be performed by the foot, The method of claim 14.

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