Motion state display device

Abstract

To provide a motion state display device and a motion state display method capable of performing performance evaluation in accordance with practical movements of sports.SOLUTION: A motion state display device 1 includes: a cable 4 delivered with movements of a user; a reel 5 for winding the cable 4; a rotary encoder 8 for detecting a rotational state of the reel 5; a magnetic viscous fluid device 9 for imparting a brake force to the reel 5; a control unit 10 for changing a load of movements by controlling a brake force relative to a stroke quantity of the cable 4 calculated based on an output value of the rotary encoder 8; and a display device D for displaying a delivery speed at which the cable 4 is delivered.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to an exercise status display device. Place Regarding. [Background technology]

[0002] When strengthening muscles or carrying out rehabilitation, training equipment that utilizes weights is often used. Such training equipment for weight training is generally designed to perform a predetermined movement that applies a load intensively to a specific muscle or part of the body as a target for muscle training, and the size of the load can be adjusted by changing the weight of the weight.

[0003] On the other hand, training equipment capable of adjusting the magnitude of the load without using weights is also known. For example, the muscle training equipment disclosed in Patent Documents 1 and 2 is configured so that the trainee rotates a handle-shaped operating part, and electromagnetic rotational resistance is applied to resist the operation. More specifically, these conventional techniques place a rotating body that rotates in conjunction with the trainee's rotation of the handle in an electrorheological fluid or a magnetorheological fluid, and adjust the load received by the user by controlling the magnitude of the electricity or magnetism applied to the viscous fluid to control the viscous resistance to the rotation.

[0004] Furthermore, the conventional technology in Patent Document 2 exemplifies a muscle strength characteristic evaluation method in which muscle strength characteristics are evaluated based on the angle of rotation, angular velocity, and torque generated by operating a handle on training equipment, as well as power data calculated from these, and output to a display or the like. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2002-126122 A [Patent Document 2] Patent No. 4956808 Summary of the Invention [Problem to be solved by the invention]

[0006] However, in the muscle strength evaluation method using the training equipment as described above, since a load is applied to a simple movement that focuses on the muscles or body parts to be trained, the load is not necessarily suitable for practical movements in sports, and there is a risk that the evaluation of the exercise state suitable for improving sports performance cannot be performed. In particular, in the muscle strength evaluation method according to the conventional technology described above, the movement form is limited by the structure of the equipment, so it is not possible to create a training state that links the muscles of the entire body, and it is not suitable for evaluating the exercise state for the purpose of improving performance.

[0007] The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an exercise status display device capable of performing performance evaluation according to practical movements in sports. Place The purpose is to provide. [Means for solving the problem]

[0008] <First aspect of the present invention> A first aspect of the present invention is a movement status display device comprising a cable that is reeled out in response to a user's movement, a measuring means for measuring the stroke amount of the cable, a magnetorheological fluid device for applying a braking force to the cable, a control unit for controlling the braking force in relation to the stroke amount of the cable calculated based on the output value of the measuring means, thereby changing the load of the movement, and a display device for displaying the reeling speed at which the cable is reeled out.

[0009] The exercise status display device according to the first aspect of the present invention calculates the stroke amount of the cable accompanying the user's movement, and changes the braking force against the payout of the cable according to the stroke amount, thereby changing the magnitude of the load during the movement. In this case, the user's movement in three-dimensional space is not restricted by the structure of the device, but the load is received during an actual movement that involves, for example, coordination of the muscles of the entire body. Therefore, the exercise status display device can visualize the payout speed of the cable during the actual movement, and can perform performance evaluation in line with practical movements in sports.

[0010] <Second aspect of the present invention> A second aspect of the present invention is a movement status display device comprising a cable that is reeled out in response to a user's movement, a measuring means that measures the stroke amount of the cable, a magnetorheological fluid device that applies a braking force to the cable, a control unit that controls the braking force in relation to the stroke amount of the cable calculated based on the output value of the measuring means, thereby changing the load of the movement, and a display device that displays information on the speed of the cable.

[0011] The exercise status display device according to the second aspect of the present invention calculates the stroke amount of the cable accompanying the user's movement, and changes the braking force against the payout of the cable according to the stroke amount, thereby changing the magnitude of the load during the movement. In this case, the user's movement in three-dimensional space is not restricted by the structure of the device, but the load is received during an actual movement, for example, in which the muscles of the entire body are coordinated. Therefore, the exercise status display device can visualize information on the speed of the cable during the actual movement, and can perform performance evaluation in line with practical movements in sports.

[0012] <The present invention 3 Aspects of The present invention 3This aspect is a movement status display device comprising: a cable that is reeled out in response to a user's movement; a measuring means for measuring the stroke amount of the cable; a magnetorheological fluid device for applying a braking force to the cable; a control unit for controlling the braking force in relation to the stroke amount of the cable calculated based on the output value of the measuring means, thereby changing the load of the movement; and a display device for displaying an actual waveform of the speed at which the cable is reeled out.

[0013] The present invention 3 The exercise status display device according to the above aspect calculates the stroke amount of the cable accompanying the user's movement, and changes the braking force for the payout of the cable according to the stroke amount, thereby changing the magnitude of the load during the movement. At this time, the user's movement in three-dimensional space is not restricted by the structure of the device, and the load is received during actual movement, for example, in which the muscles of the entire body are coordinated. Therefore, the exercise status display device can visualize the speed change during the actual movement, and can perform performance evaluation in line with practical movements in sports.

[0014] <The present invention 4 Aspects of The present invention 4 The above-mentioned embodiment of the present invention is 3 In this aspect, the display device is a motion status display device that displays a target waveform of the speed.

[0015] The present invention 4 According to the exercise status display device of this aspect, the user can compare the actual measured waveform with the target waveform for each timing and understand it, thereby enabling an evaluation of the exercise status suitable for improving performance.

[0016] <The present invention 5 Aspects of The present invention 5 The above-mentioned embodiment of the present invention is 3 or 4 In an embodiment, the display device is an exercise status display device that displays a waveform of the load relative to the stroke amount.

[0017] The present invention 5 According to the exercise status display device according to the embodiment, the measured speed waveform and the load waveform are displayed together, so that the user can visualize whether the speed of the movement is excessively reduced at the timing of the peak of the load, for example, and can evaluate whether the movement is appropriate for the desired training. 。 Effect of the Invention

[0018] According to the present invention, a motion status display device capable of evaluating performance in accordance with practical movements in sports is provided. Place can be provided. [Brief description of the drawings]

[0019] [Figure 1] FIG. 2 is a conceptual diagram showing an example of use of the exercise status display device according to the first embodiment. [Diagram 2] FIG. 2 is a schematic diagram showing the internal structure of the exercise status display device. [Diagram 3] FIG. 11 is a waveform diagram showing motion speed and load curves corresponding to a series of motions. [Figure 4] FIG. 11 is an external perspective view of an exercise status display device according to a second embodiment. [Diagram 5] FIG. 11 is a conceptual diagram showing an example of use of the exercise status display system according to the third embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] Hereinafter, the embodiments of the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the contents described below, and can be modified as desired without departing from the gist of the present invention. In addition, the drawings used in the description of the embodiments are all schematic representations of components, and may be partially emphasized, enlarged, reduced, or omitted to facilitate understanding, and may not accurately represent the scale, shape, etc. of the components.

[0021] First Embodiment 1 is a conceptual diagram showing an example of use of the exercise status display device 1 according to the first embodiment. The exercise status display device 1 is a device that can generate practical loads that match the movements in various sports and perform performance evaluation. In this embodiment, the exercise status display device 1 will be described through an example of use when practicing baseball batting.

[0022] Exercise status display device 1 is configured so that cable 4 is let out from opening 3 provided on the front of housing 2, and the tip of cable 4 is connected to a position near the core of bat B. Then, as will be described in detail later, exercise status display device 1 applies resistance to the force pulling cable 4 according to the stroke amount of cable 4 let out in accordance with the user's batting motion, thereby displaying on display device D the waveform of the swing speed when the training load is changed during the swing process of bat B. Note that cable 4 may be connected to the user's wrist.

[0023] In this embodiment, the exercise status display device 1 is fixed to a predetermined position on the support P, but the fixing position may be changed to suit the movement or user, and it may be fixed to a wall, ceiling, or floor depending on the usage form.

[0024] 2 is a schematic diagram showing the internal structure of the motion state display device 1. Inside the housing 2, 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 are mainly provided.

[0025] Reel 5 is a cylindrical member for winding up cable 4. Rotating shaft 6 is fixed to the axis of reel 5. Power spring 7 is made of a strip-shaped metal wound around rotating shaft 6, and has an inner end fixed to rotating shaft 6 and an outer end fixed, for example, to the inner wall surface of housing 2, thereby biasing reel 5 to wind up the unwound cable 4.

[0026] The rotary encoder 8 is fixed to the housing 2 and detects the rotational state of the reel 5 via the rotating shaft 6. Here, the rotational state is, for example, time-series information of the rotation angle, and is used to calculate the stroke amount and the payout speed when the cable 4 is paid out. That is, in this embodiment, the reel 5 that winds up the cable 4 and the rotary encoder 8 that detects the rotational state of the reel 5 constitute a "measurement means" that measures the stroke amount of the cable 4.

[0027] The magnetorheological fluid device 9 is a known MRF device (Magneto-Rheological Fluid) that exerts viscous resistance on an input rotational force by controlling the magnitude of the applied magnetism. In this embodiment, the magnetorheological fluid device 9 applies a braking force to the rotation of the reel 5 via the rotating shaft 6, thereby applying a load to the payout of the cable 4. When no force is acting to pay out the cable 4, the braking force is released, and the cable 4 is wound onto the reel 5 by the biasing force of the spiral spring 7.

[0028] The control unit 10 is composed of, for example, a known microcomputer control circuit, and calculates the length of the cable 4 to be paid out, i.e., the stroke amount, based on the output value of the rotary encoder 8. The control unit 10 also stores a load curve (see FIG. 3) that indicates the relationship between the stroke amount of the cable 4 and the braking force of the magnetorheological fluid device 9, and causes the magnetorheological fluid device 9 to generate a braking force in accordance with the load curve (described later) in response to the stroke amount that changes with operation.

[0029] Fig. 3 is a waveform diagram showing the motion speed and load curve corresponding to a series of motions. More specifically, the upper diagram of Fig. 3 shows the change in form of the batting motion exemplified in this embodiment, and shows how the stroke amount of the cable 4 changes in response to the change in form.

[0030] At this time, inside the exercise state display device 1, the cable 4 wound around the reel 5 is unwound in accordance with the user's movement, and the rotation state of the reel 5 is detected by the rotary encoder 8. The control unit 10 measures the stroke amount of the cable 4 based on the rotation state of the reel 5 (stroke amount measurement process). Furthermore, the control unit 10 controls the magnetorheological fluid device 9 to apply a braking force to the reel 5 in accordance with the calculated stroke amount to change the load of the movement (load change process).

[0031] Then, the control unit 10 calculates the speed at which the cable 4 is paid out in correspondence with the stroke amount based on the output value of the rotary encoder 8, and transmits the calculated speed to the display device D via a wired or wireless communication means (not shown). As a result, the display device D displays the measured waveform of the speed at which the cable 4 is paid out, as shown by the solid line in the lower diagram of Fig. 3 (display process).

[0032] The exercise status display method including the above-mentioned series of steps allows the user of the exercise status display device 1 to check the performance of his / her own movement on the display device D. More specifically, as shown in the lower diagram of Fig. 3, the display device D visualizes in a waveform how the speed of the cable 4 changes with respect to the stroke amount [mm] corresponding to the form at each moment. This allows the user to know the swing speed at each timing during the batting movement.

[0033] Furthermore, the display device D can display the target waveform of the speed in addition to the actual measured waveform of the swing speed. This allows the user to compare the actual measured waveform with the target waveform and evaluate the exercise state suitable for improving performance. For example, if there is unnecessary strain in the swing motion, it is possible to confirm that the timing of the rise of the actual measured speed is earlier than the target speed (ΔS), and the force is dispersed and the peak speed does not increase sufficiently (ΔV).

[0034] Furthermore, the display device D can display, in addition to the waveform of the swing speed, a load curve showing 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 received by the user during the movement relative to the stroke amount, and is set in advance according to the type and characteristics of the movement. In the case of a batting movement as in this embodiment, the load is low at the start of the swing of the bat B, and the waveform is set so that the load becomes the maximum load Wmax at the timing of the impact shown in (5) in the figure. More specifically, it is assumed here that the waveform is set so that the maximum load Wmax = 16 [kg] at the timing when the stroke amount = 150 [mm], for example.

[0035] By displaying the load curve overlaid, the user can visualize, for example, whether the swing speed is dropping excessively at the timing of the peak load (SD) and evaluate whether the batting is able to withstand the shock at the moment of impact.

[0036] Furthermore, the load curve is set based on theoretical values ​​for each movement through prior measurements, and characteristics such as the magnitude of the maximum load Wmax at the impact point and the peak position can be adjusted by changing the waveform of the load curve depending on parameters such as the expected ball speed and type of ball.

[0037] Here, the load curve may be stored in the control unit 10 as a plurality of variations of waveforms with different characteristics, or may be received from an external source as load curve data. The user may select and adjust the load curve to change the magnitude of the load according to the process of his / her own movement, thereby evaluating the state of motion in a practical movement suited to the purpose.

[0038] As described above, the exercise status display device 1 in this embodiment can reproduce an actual load without restricting the movement form by changing the magnitude of the load based on the stroke amount of the cable 4. Therefore, the exercise status display device 1 can perform performance evaluation in accordance with practical movements in sports.

[0039] <Second embodiment> Next, a second embodiment of the present invention will be described. The exercise status display device 11 according to the second embodiment differs from the first embodiment in the portion where the cable 4 is paid out in the exercise status display device 1 of the first embodiment described above. Below, the portions different from the first embodiment will be described, and the components common to the first embodiment will be given the same reference numerals and detailed descriptions will be omitted.

[0040] 4 is an external perspective view of an exercise status display device 11 according to the second embodiment. The exercise status display device 11 has a housing 2 and an internal structure that are substantially the same as those of the exercise status display device 1 of the first embodiment, and is provided with a cable angle detector 20 on the front side of the housing 2 for detecting the cable angle θ at which the cable 4 is reeled out.

[0041] More specifically, in this embodiment, the cable angle detection unit 20 is a mechanism for detecting the angle of the cable 4 extending 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.

[0042] The pair of support parts 21 have one end fixed to the front surface of the housing 2, and the other end extending so as to serve as a horizontal rotation axis for the rotating part 22. The rotating part 22 has a through hole formed therein through which the cable 4 extending from the opening 3 of the housing 2 is inserted, and is rotatably connected to the pair of support parts 21. The protrusion 23 is not an essential component of the cable angle detection unit 20, but is a member for making it easier for the rotational displacement of the rotating part 22 to follow the extension direction of the cable 4. The angle sensor 24 can be, for example, a sensor similar to the rotary encoder 8 described above, and detects the rotation angle between the support part 21 and the rotating part 22.

[0043] In this way, when the extending direction of cable 4 paid out from opening 3 changes in accordance with the user's movement, cable angle detection unit 20 can detect cable angle θ (-90°<θ<90°) by using angle sensor 24 to detect the rotation angle of rotating unit 22, which rotates following the extending direction. The cable angle θ is constantly transmitted from angle sensor 24 to control unit 10 during the operation of exercise status display device 11.

[0044] This allows the control unit 10 to 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 motion at each moment, and can change the magnitude of the load by controlling the braking force of the magnetorheological fluid device 9 with respect to the stroke amount and the cable angle θ.

[0045] The configuration of the cable angle detector 20 is merely an example, and other configurations having similar functions may be adopted. In the present embodiment, the cable angle detector 20 is configured to detect the vertical cable angle θ, but a similar configuration may be combined to detect the horizontal cable angle φ as well. In this case, the exercise status display device 11 can specify the position of the tip of the cable 4 in three-dimensional space by acquiring the cable angle θ and the cable angle φ in addition to the stroke amount, so that more detailed load control can be performed according to the trajectory of the movement. In addition, the exercise status display device 11 can detect the actual speed along the swing trajectory in three-dimensional space.

[0046] <Third embodiment> Next, a third embodiment of the present invention will be described. The exercise status display system 12 according to the third embodiment differs from the first embodiment in that a plurality of exercise status display devices 1 according to the first embodiment are used in conjunction with each other. Below, only the parts that differ from the first embodiment will be described, and the same reference numerals will be used to designate the same components as the first embodiment, and detailed descriptions thereof will be omitted.

[0047] 5 is a conceptual diagram showing an example of use of the exercise status display system 12 according to the third embodiment. The exercise status display system 12 includes a first exercise status display device 12a and a second exercise status display device 12b, both of which are made up of the exercise status display device 1 of the first embodiment, and are arranged apart from each other. In this embodiment, the ends of the cables 4 of the first exercise status display device 12a and the second exercise status display device 12b are connected to positions near the core of the bat B.

[0048] The force required for batting motion changes from moment to moment as shown by the dashed arrow on the swing trajectory of the bat B, which is shown by the dashed line. For this reason, the load suitable for more practical motion also changes direction along the swing trajectory.

[0049] Therefore, in the exercise status display system 12 of this embodiment, the load curves of the first exercise status display device 12a and the second exercise status display device 12b are set to different waveforms as shown by Wa and Wb, respectively, and the two work together to change the direction of the load. More specifically, Wa and Wb are set so that the resultant vector of the loads applied to the cables 4 of the first exercise status display device 12a and the second exercise status display device 12b at each moment becomes the load. The trajectory of the movement is calculated based on the difference in the stroke amount between the first exercise status display device 12a and the second exercise status display device 12b.

[0050] As a result, according to the exercise status display system 12 of the third embodiment, the magnitude of the load relative to the stroke amount of the cable 4 is coordinated between the first exercise status display device 12a and the second exercise status display device 12b in accordance with the trajectory of the movement, making it possible to display the exercise status with a load that is more suitable for practical movements.

[0051] The first and second motion status display devices 12a, 12b are appropriately positioned according to the motion and its trajectory. The first and second motion status display devices 12a, 12b may generate a complex load by connecting the ends of the cables 4 to different positions on the bat B.

[0052] Although the description of the embodiments is finished above, the present invention is not limited to the above-mentioned embodiments. For example, in the above-mentioned embodiments, the form used for batting motion in baseball is exemplified, but by appropriately setting the installation position and load curve of the motion state display device, it can be used for different sports and motions such as pitching in baseball, swinging in tennis or golf, rowing an oar in rowing, and attacking in volleyball. For example, in the case of rowing in rowing, a cable 4 is connected from the part of the oar that the user grips to the tip of the fulcrum, and a resistance force is applied to the rowing motion. It can also be applied to a training device for rehabilitation.

[0053] In addition, in each of the above embodiments, an example has been given of the control unit 10 transmitting information such as the speed of the cable 4 to the display device D for display, but the information may also be transmitted to, for example, a mobile terminal such as a user's smartphone or tablet, or a wearable terminal such as a smart watch, smart glasses, VR goggles, or AR goggles for display.

[0054] In addition, in each of the above embodiments, the reel 5 and rotary encoder 8 are used as a measuring means for measuring the stroke amount of the cable 4, but other methods may be used as long as the stroke amount of the cable 4 associated with the user's movement can be calculated. For example, by providing a wireless communication master unit in the housing 2 of the exercise status display device 1 and a wireless communication slave unit at the tip of the cable 4, the stroke amount of the cable 4 may be calculated using changes in the radio wave intensity and signal propagation time between the master unit and slave unit.

[0055] Furthermore, in the housing 2 of the motion state display device 1, the rotation state of the reel 5 may be detected using a camera instead of the rotary encoder 8. In this case, for example, a disk with markings at equal intervals in a circle is provided on the rotation axis 6 of the reel 5, and the stroke amount of the cable 4 can be detected from the interval of time and the number of rotations for reading the markings photographed by the camera. [Explanation of symbols]

[0056] 1. Exercise status display device 2. Chassis 3 Opening 4 Cable 5 Reels 6 Rotation Axis 7. Mainspring 8 Rotary Encoders 9. Magnetorheological Fluid Device 10. Control Unit B Bat P-post D Display device

Claims

1. A cable that is unwound in response to the user's movements; A measuring means for measuring the stroke amount of the cable; a magnetorheological fluid device for applying a braking force to the cable; a control unit that controls the braking force with respect to the stroke amount of the cable calculated based on the output value of the measuring means to change the load of the operation; A motion status display device comprising: a display device that displays an actual measured waveform of the speed at which the cable is reeled out.

2. The exercise status display device according to claim 1 , wherein the display device displays a target waveform of the speed.

3. The exercise status display device according to claim 1 or 2, wherein the display device displays a waveform of the load relative to the stroke amount.

4. a stroke amount measuring step for measuring a stroke amount of a cable that is paid out in accordance with a user's movement; a load changing step of applying a braking force to the cable with respect to the stroke amount to change the load of the operation; and a display step of displaying an actual measured waveform of the speed at which the cable is paid out.

5. 5. The exercise status display method according to claim 4, wherein said display step displays a target waveform of said speed.

6. 6. The exercise status display method according to claim 4, wherein the display step displays a waveform of the load relative to the stroke amount.

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