阅读说明：本技术 具有肢体支架的训练设备以及确定作用于训练设备的肢体支架上的力的方法 (Training device with a limb support and method for determining a force acting on a limb support of a training device ) 是由 O·霍贝尔 于 2020-01-03 设计创作，主要内容包括：本发明涉及一种用于训练至少一个肢体的训练设备,所述训练设备具有承载框架(2)和至少一个曲柄(4)以及至少一个肢体支架(7),所述曲柄布置在被指配给所述承载框架(2)的转轴(5)处,所述肢体支架能够以距所述转轴(5)的不同径向距离(9)紧固在所述至少一个曲柄(4)处。设置有用于检测所述至少一个肢体支架(7)与所述转轴的径向距离(9)的装置。本发明还涉及一种肢体支架(7)以及一种用于确定作用于训练设备(1)的肢体支架(7)上的力的方法。(The invention relates to a training device for training at least one limb, having a carrying frame (2) and at least one crank (4) which is arranged at a rotary shaft (5) assigned to the carrying frame (2), and having at least one limb support (7) which can be fastened at different radial distances (9) from the rotary shaft (5) at the at least one crank (4). Means are provided for detecting the radial distance (9) of the at least one limb support (7) from the axis of rotation. The invention also relates to a limb support (7) and to a method for determining a force acting on a limb support (7) of an exercise device (1).)

1. Training device for training at least one limb, having a carrying frame (2) and at least one crank (4) arranged at a rotation axis (5) assigned to the carrying frame (2), and at least one limb support (7) fastenable at the at least one crank (4) at different radial distances (9) from the rotation axis (5); characterized in that means are provided for detecting the radial distance (9) of the at least one limb support (7) from the axis of rotation (5).

2. Training device according to claim 1, characterized in that the means are designed for automatically detecting the radial distance (9) of the limb support (7) from the swivel axis (5), and that the radial distance (9) detected by the means can be fed as a measured value to an analysis unit (12) for calculating the force exerted on the limb support (7).

3. Training equipment as claimed in claim 1 or 2, characterized in that the means are formed by at least one sensor selected from the group comprising: a hall sensor (13), an ultrasonic sensor, a laser sensor and a photoelectric cell as part of a grating.

4. Training device according to claim 3, with a sensor formed by the Hall sensor (13), characterized in that the Hall sensor (13) is positioned on a plate (14) arranged immovably with respect to the rotation shaft (5) and in that a receptacle (10) and/or an elongated hole is formed in a crank (4) passing through the plate (14), into which receptacle the limb support (7) can be inserted by means of a pin (11) with a magnet (15).

5. Training equipment as claimed in claim 4, wherein the pin (11) has a bar magnet with north-south pole orientation coaxial with the pin axis.

6. Training equipment as claimed in claim 4 or 5, characterized in that a plurality of Hall sensors (13) are arranged on the plate body (14).

7. Training device according to claim 6, wherein the Hall sensor (13) arranged on the plate body (14) is arranged on a straight line which does not pass through the rotation shaft (5).

8. A limb support for an exercise device (1) according to one of claims 1 to 7, characterized in that there is a pin (11) with a bar magnet having a north-south pole orientation coaxial with the pin axis.

9. The limb brace of claim 8, wherein the orientation of the polar orientation can be used to identify a membership to an accessory group.

10. A method for determining a force acting on a limb support (7) of a training device (1), the method comprising the steps of: -positioning the limb support (7) at a radial distance (9) from the axis of rotation (5) of a crank (4) at which the radial distance (9) is detected by means of at least one sensor, and-analyzing the measured values detected by the sensor in combination with the torque acting at the axis of rotation (5) in an analysis unit (12).

Technical Field

The invention relates to a training device for training at least one limb, having a carrying frame and at least one crank arranged at a rotation axis assigned to the carrying frame, and at least one limb support which can be fastened at the at least one crank at different radial distances from the rotation axis. The invention also relates to a limb support and a method for determining a force acting on a limb support of an exercise device.

Background

A training device of the type mentioned in the opening paragraph is known, for example, from DE 102011055200B 3, which is suitable in particular for targeted training of individual muscle groups of a limb, as is required when a patient is rehabilitated. However, such training devices are also used in the leisure sector as sports equipment, for example as ergometers or for the targeted training of top-class athletes. It is to be noted here that precise control of the load, in particular the forces acting on the limb support, is required, in particular when the patient is rehabilitating. By way of example, mention may be made here of the case where the artificial hip is used at the discretion of the treating physician, and the load on the limb having the artificial hip during rehabilitation should not exceed a predetermined value, for example 20kg and the forces associated therewith. Since the current training devices can be individually adapted to different users in the rehabilitation field by varying the radial distance of the limb support from the axis of rotation, this results in that the load cannot be unambiguously derived from the applied torque due to the simple relation "torque equals force times lever arm". Alternatively, the following possibilities also exist: the training device is provided with a motor providing a certain torque at the rotation axis for passive training, but wherein the forces acting on the patient cannot be unambiguously derived from the torque without knowing the radial distance due to the above-mentioned dependency, thereby risking a recovery success rate or even possibly causing damage to the patient's health. In order to avoid these disadvantages, it is known to assign a limb support, for example a foot support (Fu β schale) for the leg, to a sensor for detecting the force (i.e. a strain gauge sensor). However, this has the disadvantage that it leads to a considerable price increase of the training device and thus to a burden on the budget required for rehabilitation.

Disclosure of Invention

It is therefore a basic object of the invention to create an exercise apparatus of the type mentioned in the opening paragraph, which exercise apparatus makes it possible to control the forces acting on the user of the exercise apparatus in a simple and inexpensive manner.

It is also an object of the invention to show an improved limb support, and an improved method for determining a force acting on a limb support of an exercise device. The object of the part relating to a training device is achieved by a training device of the type mentioned in the opening paragraph in that: means are provided for detecting the radial distance of the at least one limb support from the axis of rotation.

The invention takes the following recognition as a starting point: not only is there the possibility of measuring the force directly at the limb support, but the force can also be determined as a derived variable if, in addition to the applied torque, the radial distance of the limb support from the axis of rotation is also known. Thus, according to the invention, a device for detecting the radial distance of a limb support from a rotational axis is proposed, with which knowledge the force can then be determined in combination with the torque generated by the patient or the torque applied to the patient. In the case of healthy athletes, it can be assumed that symmetrical force variations are present at the right and left limbs, wherein this assumption is not always correct in the rehabilitation field, so that each limb support is advantageously assigned a corresponding device.

It is further preferred that the device is designed for automatically detecting the radial distance of the limb support from the axis of rotation, and that the radial distance detected by the device can be supplied as a measured value to an analysis unit for calculating the force exerted on the limb support. With the analysis provided by the analysis unit the following possibilities arise: control is exercised over the targeted training and in particular the motor is acted upon in some cases to reduce the generated drive torque or signal to the patient in a biofeedback sense that the generated force has been exceeded. The analysis unit can also be supplemented by a display unit, by means of which the calculated force is displayed as a numerical value, so that the information of the patient or the information of the physiotherapist in charge of the patient is not limited to reaching or falling below a threshold value.

Very particularly preferably, the device is formed by at least one sensor selected from the group consisting of: a hall sensor, an ultrasonic sensor, a laser sensor, and a photoelectric cell as part of a grating.

The training device with a sensor formed by a hall sensor is characterized in that the hall sensor is positioned on a plate arranged stationary relative to the axis of rotation, and a receptacle and/or an elongated hole is formed in the crank passing through the plate, into which receptacle the limb support can be inserted by means of a pin with a magnet. This results in the following advantages: the selected crank radius, i.e. the distance of the limb support from the axis of rotation, can be identified in the passing crank. It is also possible here to detect by means of a hall sensor whether a north or south magnetic pole is passing through, so that the pin expediently has a bar magnet with a north-south pole orientation which is coaxial with the pin axis. The limb support that can be inserted into the receptacle or the slot can thus be divided into two distinctly different groups, for example for leg training and arm training, i.e. for example for leg training the north pole is arranged on the side facing the crank and for arm training the south pole is oriented toward the crank, i.e. the bar magnet is rotated by 180 °.

It is further preferred that a plurality of hall sensors are arranged on the plate body, which provides advantages in particular when no receptacles are separately spaced apart from one another but rather a long hole or a corresponding sliding groove is used, since the position of the limb support in the long hole can be continuously calculated by signal deflection (Verrechnen) by using a plurality of sensors.

A further advantage is obtained when the hall sensors arranged on the plate body are arranged on a straight line which does not pass through the axis of rotation (i.e. the straight line defined by the hall sensors is not present in a strictly radial orientation, but rather is inclined with respect to the radial orientation), because then the position of the crank with respect to the plate body is always the same when the magnet passes through and thus the plate body can also be used as an indexing indicator.

The object of the parts relating to a limb support is achieved by a limb support in which there is a pin with a bar magnet having a north-south pole orientation coaxial with the pin receptacle. Since in such a limb support it is possible to detect not only the passage of the magnet but also its orientation when it is used for training, further possibilities arise: the orientation of the polar orientation can be used to identify a dependency relationship with a set of accessories.

The object of the relevant part of the method is achieved by a method for determining a force acting on a limb support of an exercise device, the method comprising the steps of: the method comprises the steps of positioning the limb support at a radial distance from a rotational axis of a crank, and detecting the radial distance by means of at least one sensor, and analyzing the measured values detected by the sensor in an analysis unit in combination with a torque acting at the rotational axis.

Drawings

The invention is explained in more detail below with the aid of embodiments shown in the drawings; in the drawings:

figure 1 shows a schematic view of the training arrangement in a side view,

figure 2 shows in perspective an enlarged view of the part of the training arrangement required for explaining the invention,

FIG. 3 shows a perspective view from a different perspective than FIG. 2, and

fig. 4 shows a side view of the object from fig. 2, but without the limb support.

Detailed Description

In fig. 1, an exercise device 1 is shown which is suitable for exercising a pair of limbs, i.e. both legs, wherein this embodiment is only intended to illustrate the invention, which can also be used for exercising other pairs of limbs, i.e. arms. The training device 1 has a carrying frame 2, which in the embodiment shown is arranged on preferably brakable rollers 3. This embodiment has two cranks 4 which are arranged at the rotary shaft 5 assigned to the carrying frame 2. Furthermore, the training device 1 has a motor 6 for driving the rotary shaft 5 and two limb supports 7, namely two foot rests 8, which can be fixed at different radial distances 9 from the rotary shaft 5 of the respectively assigned cranks 4, namely in the following manner: in the exemplary embodiment shown, two receptacles 10 are formed in each crank 4, into which a pin 11 assigned to one of the foot rests 8 can be inserted.

A device for detecting the radial distance 9 of the limb support from the axis of rotation is provided, which is designed for automatic detection, wherein the radial distance 9 detected by the device can be supplied as a measured value to the evaluation unit 12 in order to calculate the force exerted on the limb support 7 by means of the formula "force equals torque divided by lever arm", wherein the lever arm is given by the radial distance 9 of the limb support 7 from the axis of rotation 5. The torque is generated by the motor 6 and is known or applied by the patient, so that the force derived therefrom, whether the training of the patient is effective or not and at the same time avoiding overloading can be controlled by means of the detected torque and the known radial distance 9.

Ultrasonic sensors, laser sensors and opto-electronic units as part of the grating are suitable for detecting the radial distance. In the exemplary embodiment shown, the use of hall sensors 13, i.e. two hall sensors which are positioned on a plate 14 arranged stationary relative to the axis of rotation 5, is shown, wherein a receptacle 10 is formed in the crank 4 which passes through the plate 14 and into which the limb support 7 can be inserted by means of a pin 11 having a magnet 15. The receiving portion 10 can also be combined into a long hole; there may also be more than two receivers 10 in the crank 4. The pin 11 has a bar magnet with north-south orientation coaxial with the pin axis, so that it is possible to distinguish between two sets of accessories characterized by the orientation of the bar magnet, for example for leg training and for arm training.

As can be seen in particular from fig. 2 and 4, a plurality of hall sensors 13 are arranged on the plate body 14, by means of which hall sensors a straight line is defined which does not pass through the rotational axis 5, i.e. which encloses an angle with the radial orientation, so that the position of the crank relative to the available sensors is always the same when the magnet 15 passes through.

The use of the training device 1 and the method required for this purpose for determining the force acting on the limb support 7 will be explained below. For this purpose, the limb support 7 (i.e. the foot rest 8 shown in fig. 2) is first positioned at a radial distance 9 from the axis of rotation 5 by inserting the pin 11 with the magnet 15 into one of the two shown receptacles 10. By orienting the bar magnet, for example with the north pole pointing towards the receptacle 10 of the crank, the limb support 7 can be identified as a foot rest 8, for example to distinguish from a support for arm training (in which the south pole points towards the receptacle 10).

By means of the two hall sensors 13 arranged on the plate body 14, the radial distance 9 of the foot rest 8 from the rotational axis 5 can be determined in order to determine, in the evaluation unit 12, in combination with the torque acting on the rotational axis 5, the force which is output as a value in the display unit 16 in some cases.

List of reference numerals

1 training device

2 bearing frame

3 roller

4 crank

5 rotating shaft

6 Motor

7 limbs support

8 foot support

9 radial distance

10 receiving part

11 Pin

12 analysis unit

13 Hall sensor

14 plate body

15 magnet

16 display unit