Motion state display device and motion state display method

Abstract

The invention provides an exercise state display device and an exercise state display method, which can evaluate the performance of the actual motion along the physical exercise. A motion state display device (1) is provided with: a cable (4) that is released in accordance with the motion of a user; a spool (5) around which the cable (4) is wound; a rotary encoder (8) that detects the rotation state of the spool (5); a magnetorheological fluid device (9) that applies a braking force to the spool (5); a control means (10) for controlling the braking force with respect to the stroke amount of the cable (4) calculated on the basis of the output value of the rotary encoder (8), and changing the load of the operation; and a display device (D) that displays an actually measured waveform of the speed at which the cable (4) is released.

Description

Technical Field

[0001] The invention relates to a motion state display device and a motion state display method. Background Art

[0002] When performing muscle strengthening or rehabilitation training, training equipment that utilizes the weight of a weight is often used. Such training equipment for weight training is usually configured to use a specific muscle or body part as a target for muscle training, perform a prescribed action that applies a load to the target intensively, and is designed to be able to adjust the size of the load by the weight of the weight.

[0003] On the other hand, there is also known a training device that can adjust the size of the load without using weights. For example, the muscle training device disclosed in Patent Documents 1 and 2 is configured so that the trainee rotates a handle-shaped operating portion to apply electromagnetic rotational resistance in a manner that resists the operation. More specifically, in these prior arts, a rotating body that rotates in conjunction with the rotation operation of the handle performed by the trainee is arranged in an electrorheological fluid or a magnetorheological fluid, and the viscous resistance to rotation is controlled by controlling the size of the electricity or magnetism applied to the rheological fluid, thereby adjusting the load on the user.

[0004] In addition, in the prior art of Patent Document 2, the following muscle strength characteristic evaluation method is exemplified: muscle strength characteristics are evaluated based on the angle, angular velocity, torque, and power data calculated from the rotation angles obtained by operating the handles in the training device, and output to a display, etc.

[0005] Prior art literature

[0006] Patent Literature

[0007] Patent Document 1: Japanese Patent Application Publication No. 2002-126122

[0008] Patent Document 2: Japanese Patent No. 4956808 Summary of the invention

[0009] Technical problem to be solved by the invention

[0010] However, in the muscle strength characteristic evaluation method performed by the training device as described above, since the load is applied to the simple movement of the muscle or body part of the training object, it is not necessarily a load application method suitable for the actual movement of sports, and it may not be possible to evaluate the movement state suitable for improving the performance of sports. In particular, in the muscle strength characteristic evaluation method involved in the above-mentioned prior art, since the movement form is limited by the structure of the device, it is not suitable for evaluating the movement state for the purpose of improving the performance, in addition to being unable to form a training state that makes the muscles of the whole body move in conjunction.

[0011] The present invention has been made in view of such circumstances, and an object of the present invention is to provide an exercise status display device and an exercise status display method capable of evaluating performance along actual movements of sports.

[0012] Technical solutions adopted to solve technical problems

[0013] <First aspect of the present invention>

[0014] A first aspect of the present invention is a motion state display device, comprising: a cable that is released in accordance with a user's movement; a measuring unit that measures a stroke of the cable; a magnetorheological fluid device that applies a braking force to the cable; a control unit that controls the braking force based on the stroke of the cable calculated based on an output value of the measuring unit to change the load of the movement; and a display device that displays a release speed of the cable.

[0015] The motion state display device involved in the first embodiment of the present invention calculates the stroke amount of the cable following the user's action, and changes the braking force for releasing the cable according to the stroke amount, thereby being able to change the magnitude of the load during the action. At this time, the user's action in three-dimensional space is not limited by the structure of the device, and the load is applied in actual actions such as linking the muscles of the whole body. Therefore, according to the motion state display device, the release speed of the cable during the actual action can be visualized, and the performance evaluation along the actual action of the sport can be performed.

[0016] <Second Aspect of the Invention>

[0017] A second embodiment of the present invention is a motion state display device, which comprises: a cable that is released in accordance with the user's movement; a measuring unit that measures the stroke of the cable; a magnetorheological fluid device that applies a braking force to the cable; a control unit that controls the braking force based on the stroke of the cable calculated based on the output value of the measuring unit to change the load of the movement; and a display device that displays information on the speed of the cable.

[0018] The motion state display device involved in the second embodiment of the present invention calculates the stroke of the cable accompanying the user's action, and changes the braking force for releasing the cable according to the stroke, thereby being able to change the magnitude of the load during the action. At this time, the user's action in three-dimensional space is not limited by the structure of the device, for example, in actual actions such as linking the muscles of the whole body, the load is applied. Therefore, according to the motion state display device, it is possible to visualize the information of the speed of the cable during the actual action, and to evaluate the performance along the actual action of the sport.

[0019] <Third Aspect of the Invention>

[0020] A third embodiment of the present invention is a motion state display device, comprising: a cable that is released in accordance with the user's movements; a measuring unit that measures the stroke of the cable; a magnetorheological fluid device that applies a braking force to the cable; a control unit that controls the braking force based on the stroke of the cable calculated based on the output value of the measuring unit to change the load of the movement; and a display device that displays a measured waveform of the speed at which the cable is released.

[0021] The motion state display device involved in the third embodiment of the present invention calculates the stroke of the cable following the user's movement, and changes the braking force for releasing the cable according to the stroke, thereby being able to change the magnitude of the load during the movement. At this time, the user's movement in three-dimensional space is not limited by the structure of the device, and for example, the load is applied in actual movements such as linking the muscles of the whole body. Therefore, according to the motion state display device, it is possible to visualize the speed changes during the actual movement process, and to perform performance evaluation along the actual movement of the sport.

[0022] <Fourth aspect of the present invention>

[0023] A fourth aspect of the present invention is an exercise status display device, wherein in the third aspect of the present invention, the display device displays the target waveform of the speed.

[0024] According to the exercise status display device according to the fourth aspect of the present invention, the user can compare and understand the actually measured waveform and the target waveform at each timing, and can evaluate the exercise status suitable for improving performance.

[0025] <Fifth Aspect of the Invention>

[0026] A fifth aspect of the present invention is an exercise state display device, wherein in the third or fourth aspect of the present invention, the display device displays a waveform of the load relative to the stroke amount.

[0027] According to the exercise status display device involved in the fifth embodiment of the present invention, by displaying the measured waveform of speed and the waveform of load together, the user can visualize whether the speed of the timed action at the peak of the load is excessively reduced, and can evaluate whether the action is appropriate for the desired training.

[0028] <Sixth Aspect of the Invention>

[0029] A sixth aspect of the present invention is a motion status display method, comprising: a stroke measurement step of measuring the stroke of a cable released in accordance with a user's movement; a load change step of applying a braking force to the cable according to the stroke to change the load of the movement; and a display step of displaying a release speed of the cable.

[0030] According to the exercise state display method involved in the sixth aspect of the present invention, the stroke amount of the cable following the user's action is calculated, and the braking force for releasing the cable is changed according to the stroke amount, thereby making it possible to change the magnitude of the load during the action. At this time, the user's action in three-dimensional space is not restricted, and the load is applied in actual actions such as linking the muscles of the whole body. Therefore, according to the exercise state display method, the release speed of the cable during the actual action process can be visualized, and the performance evaluation along the actual action of the sport can be performed.

[0031] <Seventh Aspect of the Invention>

[0032] The seventh embodiment of the present invention is a motion status display method, which includes: a stroke measurement step, measuring the stroke of the cable released as the user moves; a load change step, applying a braking force to the cable according to the stroke to change the load of the movement; and a display step, displaying information on the speed of the cable.

[0033] According to the motion state display method involved in the seventh mode of the present invention, the stroke of the cable following the user's action is calculated, and the braking force for releasing the cable is changed according to the stroke, thereby making it possible to change the magnitude of the load during the action. At this time, the user's action in three-dimensional space is not restricted, and the load is applied in actual actions such as linking the muscles of the whole body. Therefore, according to the motion state display method, the information of the speed of the cable during the actual action can be visualized, and the performance evaluation along the actual action of the sport can be performed.

[0034] <Eighth Aspect of the Invention>

[0035] The eighth aspect of the present invention is a motion status display method, which includes: a stroke measurement step, measuring the stroke of the cable released as the user moves; a load change step, applying a braking force to the cable according to the stroke to change the load of the action; and a display step, displaying a measured waveform of the speed at which the cable is released.

[0036] According to the motion state display method involved in the eighth embodiment of the present invention, the stroke of the cable following the user's action is calculated, and the braking force for releasing the cable is changed according to the stroke, thereby making it possible to change the size of the load during the action. At this time, the user's action in three-dimensional space is not restricted, for example, the load is applied in actual actions such as linking the muscles of the whole body. Therefore, according to the motion state display method, the speed change during the actual action process can be visualized, and the performance evaluation along the actual action of the sport can be performed.

[0037] <Ninth Aspect of the Invention>

[0038] A ninth aspect of the present invention is an exercise status display method, wherein in the eighth aspect of the present invention, in the display step, a target waveform of the speed is displayed.

[0039] According to the exercise status display method according to the ninth aspect of the present invention, the user can compare and understand the actually measured waveform and the target waveform at each timing, and can evaluate the exercise status suitable for improving performance.

[0040] <Tenth Aspect of the Invention>

[0041] A tenth aspect of the present invention is an exercise state display method, wherein in the eighth or ninth aspect of the present invention, in the display step, a waveform of the load relative to the stroke amount is displayed.

[0042] According to the exercise status display method involved in the tenth embodiment of the present invention, by displaying the measured waveform of speed and the waveform of load together, the user can visualize whether the speed of the timed action at the peak of the load is excessively reduced, for example, and can evaluate whether the action is appropriate for the desired training.

[0043] Effects of the Invention

[0044] According to the present invention, it is possible to provide an exercise status display device and an exercise status display method capable of evaluating performance along actual movements of a sport. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 It is a schematic diagram showing a usage example of the exercise status display device according to the first embodiment.

[0046] Figure 2 2 is a schematic diagram showing the internal structure of the motion status display device.

[0047] Figure 3 It is a waveform diagram showing the motion speed and load curve corresponding to a series of motions.

[0048] Figure 4It is a perspective view of the appearance of the exercise status display device involved in the second embodiment.

[0049] Figure 5 It is a schematic diagram showing a usage example of the exercise status display system involved in the third embodiment.

[0050] Description of Reference Numerals

[0051] 1… motion state display device; 2… housing; 3… opening; 4… cable; 5… reel; 6… rotating shaft; 7… coil spring; 8… rotary encoder; 9… magnetorheological fluid device; 10… control unit; B… bat; P… support; D… display device. DETAILED DESCRIPTION

[0052] The embodiments of the present invention are described in detail below with reference to the accompanying drawings. In addition, the present invention is not limited to the contents described below, and can be arbitrarily changed in the scope of the main purpose. In addition, the drawings used in the description of the embodiments are all drawings schematically showing the components, and some parts are emphasized, enlarged, reduced or omitted in order to deepen the understanding, and sometimes the scale, shape, etc. of the components are not accurately shown.

[0053] <First Embodiment>

[0054] Figure 1 1 is a schematic diagram showing a use case of the motion state display device 1 involved in the first embodiment. The motion state display device 1 is a device that can generate an actual load that matches the movements of various sports to perform performance evaluation. In this embodiment, the motion state display device 1 is described by using an example of use during baseball batting practice.

[0055] The motion state display device 1 is configured in appearance to release a cable 4 from an opening 3 provided on the front of a housing 2, and the front end of the cable 4 is connected to a position near the core of a bat B. In addition, the motion state display device 1 provides resistance to the force of pulling the cable 4 according to the stroke of the cable 4 released in accordance with the hitting action of the user, as described in detail later, thereby displaying the waveform of the swing speed when the training load is changed during the swing of the bat B on the display device D. In addition, the cable 4 may be connected to the wrist of the user.

[0056] In addition, in this embodiment, the motion status display device 1 is fixed to a predetermined position of the support P, but the fixed position may be changed in accordance with the action or the user, and may be fixed to a wall, ceiling or floor according to the usage.

[0057] Figure 21 is a schematic diagram showing the internal structure of the motion state display device 1. The housing 2 mainly includes a reel 5, a rotating shaft 6, a spiral spring 7, a rotary encoder 8, a magnetorheological fluid device 9, and a control unit 10.

[0058] The drum 5 is a cylindrical member for winding the cable 4. The rotating shaft 6 is fixed to the axis of the drum 5. The coil spring 7 is composed of a strip of metal wound around the rotating shaft 6, with the inner end fixed to the rotating shaft 6 and the outer end fixed to the inner wall surface of the housing 2, for example, so as to apply force to make the drum 5 wind up the unwound cable 4.

[0059] The rotary encoder 8 is fixed to the housing 2 and detects the rotation state of the drum 5 via the rotating shaft 6. Here, the rotation state is, for example, time series information of the rotation angle, which is used to calculate the stroke amount or the release speed when the cable 4 is released. That is, in this embodiment, the drum 5 around which the cable 4 is wound and the rotary encoder 8 that detects the rotation state of the drum 5 constitute a "measuring unit" for measuring the stroke amount of the cable 4.

[0060] The magnetorheological fluid device 9 is a well-known MRF (Magneto-Rheological Fluid) device, which controls the magnitude of the applied magnetism to cause viscous resistance to act on the input rotational force. In this embodiment, the magnetorheological fluid device 9 applies a braking force to the rotation of the drum 5 via the rotating shaft 6, thereby applying a load to the release of the cable 4. The braking force is released when the force for releasing the cable 4 does not work, and the cable 4 is wound on the drum 5 by the applied force of the coil spring 7.

[0061] The control unit 10 is composed of, for example, a known microcomputer control circuit, and calculates the length of the cable 4 that has been unwound, that is, the stroke amount, based on the output value of the rotary encoder 8. In addition, the control unit 10 stores a load curve (see FIG. 1 ) showing the relationship between the stroke amount of the cable 4 and the braking force of the magnetorheological fluid device 9. Figure 3 ), the magnetorheological fluid device 9 generates a braking force that follows a load curve described later in response to the stroke amount that changes with the action.

[0062] Figure 3 is a waveform diagram showing the motion speed and load curve corresponding to a series of motions. More specifically, Figure 3 The upper figure shows the change in form of the hitting action illustrated in the present embodiment, and shows how the stroke amount of the cable 4 changes in accordance with the change in form.

[0063] At this time, inside the motion state display device 1, the cable 4 wound around the drum 5 is unwound in accordance with the user's motion, and the rotary encoder 8 detects the rotation state of the drum 5. In addition, the control unit 10 measures the stroke amount of the cable 4 based on the rotation state of the drum 5 (stroke amount measuring step). Furthermore, the control unit 10 controls the magnetorheological fluid device 9 to apply a braking force to the drum 5 according to the calculated stroke amount to change the load of the motion (load changing step).

[0064] Then, the control unit 10 calculates the speed at which the cable 4 is released corresponding to the stroke amount based on the output value of the rotary encoder 8, and transmits it to the display device D via a wired or wireless communication unit (not shown). Figure 3 As shown by the solid line in the lower figure, the display device D displays the measured waveform of the speed at which the cable 4 is paid out (display step).

[0065] By using the exercise status display method including the above series of steps, the user of the exercise status display device 1 can confirm the performance of his own movements on the display device D. More specifically, Figure 3 As shown in the figure below, the display device D visualizes how the speed of the cable 4 changes with respect to the stroke amount [mm] corresponding to each instantaneous form through a waveform. Therefore, the user can know the swing speed at each moment during the batting action.

[0066] In addition to displaying the measured waveform of the swing speed, the display device D can also superimpose a target waveform of the speed. Thus, the user can compare the measured waveform with the target waveform and evaluate the exercise state suitable for improving performance. For example, when there is excess force in the swing action, it can be confirmed that the timing of the measured speed rising earlier than the target speed (ΔS) or the force is dispersed and the peak speed does not rise sufficiently (ΔV).

[0067] Furthermore, in addition to displaying the waveform of the swing speed, the display device D can also overlap and display a load curve representing the change in the load W [kg] of the braking force generated by the magnetorheological fluid device 9. The load curve is a waveform of the load borne by the user in action relative to the stroke amount, and is set in advance according to the type or characteristics of the action. In the case of a batting action such as the present embodiment, the waveform is set in such a way that the load is low at the beginning of the swing of the bat B and reaches the maximum load Wmax at the moment of the strike shown in (5) in the figure. More specifically, here, for example, a waveform is set to reach the maximum load Wmax = 16 [kg] at the moment of the stroke amount = 150 [mm].

[0068] By superimposing and displaying the load curve, the user can visualize whether the swing speed is not excessively reduced (SD) at the peak of the load, for example, and evaluate whether the shot is not inferior to the impact at the moment of impact.

[0069] In addition, the load curve is measured and set in advance based on the theoretical value of each action. According to parameters such as the assumed ball speed or ball type, the size or peak position of the maximum load Wmax at the hitting point can be adjusted as a waveform change of the load curve.

[0070] Here, the load curve may be stored in the control unit 10 as a plurality of waveforms with different characteristics, or may be appropriately received from the outside as load curve data. Then, the user can select and adjust the load curve so that the load changes along the course of his or her own movement, thereby being able to evaluate the motion state in the actual movement that meets the purpose.

[0071] As described above, the exercise status display device 1 of this embodiment can reproduce the actual load without limiting the motion form by changing the load size based on the stroke amount of the cable 4. Therefore, the exercise status display device 1 can perform performance evaluation along the actual motion of the sport.

[0072] <Second Embodiment>

[0073] Next, a second embodiment of the present invention will be described. The motion state display device 11 involved in the second embodiment is different from the first embodiment in the release portion of the cable 4 in the motion state display device 1 of the first embodiment. Below, the parts different from the first embodiment will be described, and the same reference numerals are given to the components common to the first embodiment, and detailed descriptions are omitted.

[0074] Figure 4 2 is a perspective view of the appearance of the motion state display device 11 according to the second embodiment. The housing 2 and its internal structure of the motion state display device 11 are substantially the same as those of the motion state display device 1 according to the first embodiment, and a cable angle detection unit 20 for detecting the cable angle θ at which the cable 4 is released is provided on the front of the housing 2.

[0075] More specifically, the cable angle detection unit 20 in the present embodiment is a mechanism for detecting the angle at which the cable 4 extends in the vertical direction, and includes a pair of support portions 21 , a rotating portion 22 , a protruding portion 23 , and an angle sensor 24 .

[0076] One end of a pair of support parts 21 is fixed to the front of the housing 2, and the other end extends in a manner that becomes a rotation axis in the horizontal direction relative to the rotating part 22. The rotating part 22 is formed with a through hole for inserting the cable 4 extending from the opening part 3 of the housing 2, and is rotatably connected to the pair of support parts 21. The protrusion 23 is not a necessary structure of the cable angle detection part 20, but is a component for making the rotation displacement of the rotating part 22 easily follow the extension direction of the cable 4. The angle sensor 24 can detect the rotation angle of the support part 21 and the rotating part 22, for example, using the same sensor as the above-mentioned rotary encoder 8.

[0077] In this way, when the extension direction of the cable 4 released from the opening 3 changes due to the action of the user, the cable angle detection unit 20 can detect the cable angle θ (-90°<θ<90°) by detecting the rotation angle of the rotating unit 22 rotating to follow the extension direction through the angle sensor 24. The cable angle θ is always sent from the angle sensor 24 to the control unit 10 during the operation of the motion state display device 11.

[0078] Thus, the control unit 10 can detect the cable angle θ in the vertical direction in addition to the stroke amount of the cable 4. Therefore, the control unit 10 can more accurately recognize the state of the user's action at each moment, and can control the braking force of the magnetorheological fluid device 9 according to the stroke amount and the cable angle θ to change the magnitude of the load.

[0079] In addition, the structure of the cable angle detection unit 20 is only an example, and other structures with the same function can be used. In addition, in the present embodiment, the cable angle θ in the vertical direction can be detected by the cable angle detection unit 20, but the cable angle φ in the horizontal direction can also be detected by combining the same structure. In this case, the motion state display device 11 obtains the cable angle θ and the cable angle φ in addition to the stroke amount, thereby determining the position of the front end of the cable 4 in the three-dimensional space, so that more detailed load control can be performed in accordance with the trajectory of the action. In addition, the motion state display device 11 can detect the measured speed along the swing trajectory in the three-dimensional space.

[0080] <Third Embodiment>

[0081] Next, the third embodiment of the present invention is described. The motion state display system 12 involved in the third embodiment is different from the first embodiment in that a plurality of the motion state display devices 1 of the first embodiment are used in conjunction with each other. Below, the parts different from the first embodiment are described, and the same reference numerals are given to the components common to the first embodiment, and detailed descriptions are omitted.

[0082] Figure 51 is a schematic diagram showing a use example of the motion state display system 12 of the third embodiment. The motion state display system 12 includes a first motion state display device 12a and a second motion state display device 12b, both of which are composed of the motion state display device 1 of the first embodiment, and the first motion state display device 12a and the second motion state display device 12b are configured separately from each other. In addition, in this embodiment, the front end of the cable 4 of each of the first motion state display device 12a and the second motion state display device 12b is connected to a position near the core of the bat B.

[0083] However, the force required for the hitting action changes moment by moment as shown by the dotted line arrow on the swing trajectory of the bat B. Therefore, the load more suitable for the actual action also changes direction along the swing trajectory.

[0084] Therefore, in the motion state display system 12 of the present embodiment, the load curves of the first motion state display device 12a and the second motion state display device 12b are set to different waveforms as shown in Wa and Wb, respectively, and the two cooperate to change the direction of the load. More specifically, Wa and Wb are set in such a way that the composite vector of the load applied to the cables 4 of the first motion state display device 12a and the second motion state display device 12b at each moment becomes the load. In addition, the trajectory of the action is calculated based on the difference in the stroke amount of the first motion state display device 12a and the second motion state display device 12b.

[0085] Therefore, according to the motion state display system 12 involved in the third embodiment, the size of the load relative to the stroke of the cable 4 is linked between the first motion state display device 12a and the second motion state display device 12b by coordinating the trajectory of the action, so that the motion state can be displayed with a load that is more suitable for the actual action.

[0086] In addition, in the first motion state display device 12a and the second motion state display device 12b, the configuration of the action or the track thereof is appropriately set. In addition, the first motion state display device 12a and the second motion state display device 12b can also respectively connect the front end of the cable 4 to different positions of the bat B to generate complex loads.

[0087] The above is the end of the description of the embodiments, but the present invention is not limited to the above embodiments. For example, in the above embodiments, the method used in the batting action of baseball is illustrated, but by appropriately setting the installation position and load curve of the motion state display device, it can also be used for different items or actions such as baseball pitching, tennis or golf swings, rowing paddling operations, and volleyball hitting. For example, in the case of rowing paddle operations, a cable 4 is connected from the part of the paddle that the user holds to the front end of the fulcrum to provide resistance to the paddling operation. In addition, it can also be applied to training devices for rehabilitation training.

[0088] In addition, in the above-mentioned embodiments, the control unit 10 sends information such as the speed of the cable 4 to the display device D for display, but it can also be sent to a portable terminal such as the user's smartphone or tablet computer, a smart watch, smart glasses, VR goggles, AR goggles and other wearable terminals for display.

[0089] In addition, in each of the above-mentioned embodiments, as a measuring unit for measuring the stroke amount of the cable 4, a method using the reel 5 and the rotary encoder 8 is exemplified, but other methods may be used as long as the stroke amount of the cable 4 following the user's movement can be calculated. For example, a wireless communication mother unit may be provided in the housing 2 of the motion state display device 1, and a wireless communication child unit may be provided at the front end side of the cable 4, so as to calculate the stroke amount of the cable 4 by using changes in the radio wave strength or signal propagation time between the mother unit and the child unit.

[0090] In addition, in the housing 2 of the motion state display device 1, a camera may be used instead of the rotary encoder 8 to detect the rotation state of the reel 5. In this case, for example, a disk with circular marks applied at equal intervals is provided on the rotating shaft 6 of the reel 5, and the stroke amount of the cable 4 can be detected by the interval of the reading time of the marks photographed by the camera and the rotation speed.

Claims

1. A motion status display device, comprising: Cables, which are released in response to the user's movements; a measuring unit for measuring a stroke amount of the cable; a magnetorheological fluid device that imparts a braking force to the cable; a control unit configured to control the braking force to change the load of the operation with respect to the stroke amount of the cable calculated based on the output value of the measuring unit; and A display device displays a pay-out speed at which the cable is paid out.

2. A motion status display device, comprising: Cables, which are released in response to the user's movements; a measuring unit for measuring a stroke amount of the cable; a magnetorheological fluid device that imparts a braking force to the cable; a control unit configured to control the braking force to change the load of the operation with respect to the stroke amount of the cable calculated based on the output value of the measuring unit; and A display device displays the speed information of the cable.

3. A motion status display device, comprising: Cables, which are released in response to the user's movements; a measuring unit for measuring a stroke amount of the cable; a magnetorheological fluid device that imparts a braking force to the cable; a control unit configured to control the braking force to change the load of the operation with respect to the stroke amount of the cable calculated based on the output value of the measuring unit; and A display device displays a measured waveform of the speed at which the cable is paid out.

4. The motion status display device according to claim 3, wherein: The display device displays the target waveform of the speed.

5. The motion status display device according to claim 3 or 4, wherein: The display device displays a waveform of the load with respect to the stroke amount.

6. A method for displaying a motion state, comprising: a stroke amount measuring step of measuring the stroke amount of the cable released in response to the user's action; a load changing step of applying a braking force to the cable in accordance with the stroke amount to change the load of the action; and The display step is to display the pay-out speed of the cable.

7. A method for displaying a motion state, comprising: a stroke amount measuring step of measuring the stroke amount of the cable released in response to the user's action; a load changing step of applying a braking force to the cable in accordance with the stroke amount to change the load of the action; as well as The display step displays the speed information of the cable.

8. A method for displaying a motion state, comprising: a stroke amount measuring step of measuring the stroke amount of the cable released in response to the user's action; a load changing step of applying a braking force to the cable in accordance with the stroke amount to change the load of the action; as well as The step of displaying is to display a measured waveform of the speed at which the cable is paid out.

9. The method for displaying the motion status according to claim 8, wherein: In the display step, the target waveform of the speed is displayed.

10. The method for displaying the motion status according to claim 8 or 9, wherein: In the display step, a waveform of the load relative to the stroke amount is displayed.

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