JP2016150179A - Motion measuring device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a motion measuring device that can be securely mounted on an ankle, and can detect a motion of the ankle with a high degree of precision.SOLUTION: A detection part 20 and a vibration generation part 30 are incorporated in a belt-like body 11. The belt-like body 11 has a flexible member 14 inside. While Achilles tendon 3 enters a recess 15, an inner support part 16a is brought into contact with a bone 4 inside, an outer support part 16b is brought into contact with a bone 5 outside, and the belt-like body 11 is mounted so as to hold the ankle with the belt-like body 11. The motion of the ankle 2 is detected by the detection part 20, and vibration is applied to the ankle from the vibration generation part 30.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a motion measuring apparatus that measures motion data by attaching a detection unit that detects motion of a foot to an ankle.

  An apparatus for attaching a sensor to an ankle is used as a movement measuring device that detects movement of a foot with a sensor and measures movement data. Patent Document 1 discloses a measurement device in which a measurement unit for measuring a person's movement / motion and a display unit for displaying a measurement result are provided separately, and the measurement unit is mounted near the Achilles tendon of a person's ankle. Have been described. The measurement unit is provided with a pressure sensor, and the measurement unit is attached to the ankle by winding a band or a tape around the ankle. Expansion and contraction of the Achilles tendon is detected by the pressure sensor, and the pressure data is recorded. Based on this pressure data, a person's sleeping state or standing state is identified.

JP 2006-305311 A

  Since the sensor described in Patent Document 1 is mounted using a band or a tape, the band or the tape itself is likely to rotate or shift due to walking or vibration, and normal data cannot be measured. is there.

  In order to prevent rotation and displacement, it is necessary to tighten the ankle with a band or tape, but if tightened strongly, muscles (such as anterior tibialis muscle), Achilles tendon, arteries, etc. will be excessively tightened, Not only will the wearing feeling worsen, it will also interfere with normal walking.

  The present invention solves the above-described conventional problems, and an object of the present invention is to provide a motion measurement device that can prevent rotation and displacement without tightening an ankle, and can measure accurate motion data while enhancing the wearing feeling. It is said.

The present invention relates to a motion measuring device that detects the motion of a foot.
A band-shaped main body attached to the ankle is provided, and a detection unit for detecting the movement of the foot is housed inside the band-shaped main body,
The band-shaped main body is formed with a support portion supported by at least one of the inner and outer heels of the ankle, and a detent portion provided across the Achilles tendon. is there.

  In the motion measuring device of the present invention, it is preferable that the rotation preventing portion is formed continuously following the outer shape of the Achilles tendon.

  The motion measuring device of the present invention can be configured such that an elastic member is provided inside the band-shaped main body, and the band-shaped main body sandwiches the inner side and the outer side of the ankle by the elastic force of the elastic member.

  In the motion measuring device of the present invention, the cross-sectional shape of the inner surface of the belt-shaped main body can be a shape that gradually spreads upward or downward of the foot.

  In the motion measuring device according to the present invention, it is preferable that the belt-like main body has a length that surrounds the ankle at 360 degrees or more.

  In this case, it is preferable that a gap or an open portion is formed between a portion of the inner surface of the belt-shaped main body facing the concave portion and the front portion of the ankle.

  In the motion measuring apparatus according to the present invention, the belt-like main body is supported by at least two points of the Achilles tendon and the heel, and the anti-rotation portion formed on the inner surface of the belt-like main body sandwiches the Achilles tendon from the left and right. It becomes difficult and the detection part provided in the strip | belt-shaped main body can operate | move integrally with an ankle. For this reason, it is possible to detect the movement of the ankle with high accuracy in various motions such as walking and running.

  In addition, since it does not shift even if it is not tightened and held on the ankle part, it can suppress the pressure on the muscles, and the ankle movement in the same state as the non-wearing state can be suppressed without disturbing the walking movement. It can be detected accurately.

  In addition, since the entire ankle is not tightened like a band or a tape, it is possible to eliminate the uncomfortable feeling at the time of wearing.

It is the side view which looked at the state with which the exercise | movement measuring device for right feet concerning the 1st Embodiment of this invention was mounted | worn with the right foot from the inner side of the right foot. It is the longitudinal cross-sectional view which looked at the state with which the exercise | movement measuring apparatus shown in FIG. 1 was mounted | worn with the right leg from the front of the right leg. It is a top view which shows the whole structure of the exercise | movement measuring apparatus for right feet shown in FIG. It is the plane sectional view which looked at the state where the motion measuring device for right legs shown in Drawing 1 was equipped on the right leg from the upper part of the right leg. It is a block diagram which shows schematic structure of the control apparatus which controls the movement measuring apparatus which concerns on embodiment of this invention. It is a top view which shows the exercise | movement measuring apparatus for right legs and left legs concerning embodiment of this invention. It is a longitudinal cross-sectional view which shows the state with which the exercise | movement measuring apparatus for right feet and left feet shown in FIG. 6 was mounted | worn on the right foot and the left foot, respectively. It is a top view which shows the exercise | movement measuring device for right feet concerning the 2nd Embodiment of this invention. It is a top view which shows the exercise | movement measuring device for right feet concerning the 3rd Embodiment of this invention. FIG. 9 is a cross-sectional view showing a state where the motion measuring device shown in FIG. 8 is attached to the right foot.

  Hereinafter, a motion measuring device according to an embodiment of the present invention will be described in detail with reference to the drawings. This motion measuring device measures motion data by attaching a sensor for detecting foot motion to the ankle.

  1 to 4 show a motion measuring apparatus 10 according to a first embodiment of the present invention. The motion measuring apparatus 10 shown in FIGS. 1 to 4 is used by being detachably attached to the ankle 2 of the right foot 1. The motion measuring device 10 includes a band-shaped main body 11 that is attached to the ankle 2. The band-shaped main body 11 is attached to the upper part of the inner collar (inner fruit) 4a and outer collar (outer fruit) 5a of the ankle 2. As shown in FIGS. 3 and 4, inside the cross section of the belt-shaped main body 11, a detection unit 20 provided with a sensor that detects the motion of the foot, a vibration generation unit 30 that is a stimulus applying unit that gives stimulation to the foot, A battery 50 for driving each part and a control device 60 for controlling each part are housed. A light emitting unit 40 is provided outside the belt-shaped main body 11 obliquely forward.

  As shown in FIG. 3, the belt-like main body 11 has a shape that circulates at an angle of 360 degrees or more so that one end 13a and the other end 13b overlap in a free state. As shown in FIG. 4, the band-shaped main body 11 is mounted so as to surround the ankle 2 at 360 degrees or more.

  The band-shaped body 11 is made of a flexible material made of a synthetic resin such as polyurethane or silicon, or an elastomer such as fluororubber, and an elastic member 14 formed of a metal leaf spring material is embedded therein to be in a free state. Thus, the circular shape shown in FIG. 3 can be maintained.

  As shown in FIG. 3, a recess 15 that sandwiches the Achilles tendon 3 is formed behind the inner surface 12 of the belt-shaped main body 11. Raised portions 15a and 15b projecting in the central direction are formed on both sides of the portion where the recess 15 is formed, and these portions are formed thicker inward and outward than the other portions of the belt-like body 11. Has been. As a result, the concave portion 15 can be formed deeply, and the inner surface 15c of the concave portion 15 can be formed into a concave curved surface. In this embodiment, the raised portions 15a and 15b constitute a rotation preventing portion.

  Inner support portions 16 a and outer support portions 16 b are formed on the left and right sides of the inner surface 12 of the belt-shaped main body 11. The elastic member 14 exerts an elastic force mainly in a direction in which the inner support portion 16a and the outer support portion 16b are brought close to each other.

  The band-shaped main body 11 is attached to the upper part of the ankle 2 as shown in FIGS. 2 and 4 with the end 13a and the end 13b spread apart from each other. When the Achilles tendon 3 is inserted into the recess 15 and is mounted so as to surround the ankle 2, the belt-like main body 11 has an inner support portion 16 a that is a part of the inner collar 4 a, specifically, an inner side of the ankle 2. When the bone (tibial bone including the inner rib 4a) 4 is slightly strengthened, the outer support portion 16b slightly hits the outer rib 5a, specifically, the outer bone (rib including the outer rib 5a) 5.

  The band-shaped main body 11 enters the concave surface 15 having a deep curved surface with the Achilles tendon 3 deeper, and an inner rib 4a (inner bone 4) and an outer rib 5a (outer bone 5) are formed by the inner support portion 16a and the outer support portion 16b. Since it is mounted so as to be sandwiched, the band-shaped main body 11 is easily fitted to the ankle 2, is not easily displaced in the rotation direction, and can easily follow the movement of the ankle 2. Since it can be supported by the heel and supported on the bone, it is not affected by muscle hypertrophy or blood vessel pulsation during exercise, the body movement can be accurately detected, and there is no possibility of erroneous detection of movement.

  As shown in FIG. 2, the lower part 12a of the inner surface 12 of the strip-shaped main body 11 is formed in a taper shape whose diameter increases downward. As a result, the inner surface 12 of the band-shaped main body 11 fits to the protrusions of the inner collar 4a and the outer collar 5a of the ankle 2, so that the band-shaped main body 11 is attached to the ankle 2 in a state that is not easily displaced.

  The band-shaped main body 11 may be attached to the lower part of the inner heel 4a and the outer heel 5a of the ankle 2. In this case, the upper portion 12b of the inner surface 12 of the band-shaped main body 11 is formed in a taper shape whose diameter increases toward the upper end, so that it can be fitted to the protrusions of the inner collar 4a and the outer collar 5a.

  The belt-shaped main body 11 receives the elastic force of the inner support portion 16a and the outer support portion 16b and slightly abuts against the ankle 2. The support portion has an inner bone 4 and an outer bone 5 with a relatively hard surface. Therefore, the belt-like main body 11 is less likely to be displaced, and further, it is difficult to feel a pressure when worn.

  As shown in FIG. 4, muscle (anterior tibial muscle 6) is present in front of the ankle 2, but in this portion, a gap 17 is formed between the inner surface 12 of the band-shaped body 11 and the ankle 2. . The band-shaped body 11 is mounted so as to be integrated with the ankle 2 so as to surround the ankle 2 in a range of 360 degrees or more, but a gap 17 is formed between the inner surface 12 and the muscle (anterior tibial muscle 6). Therefore, when the ankle 2 is moved to perform walking, running, or various exercises, the muscle (anterior tibial muscle 6) is not compressed, and the wearing feeling is improved.

  Instead of the gap 17, an open portion where the strip-shaped main body is interrupted may be formed. By providing a gap 17 or an open part at the opposite location of the anterior tibial muscle 6, the anterior tibial muscle is not compressed by the belt-like body during operation, and can perform the same operation as when not worn, thus improving the accuracy of detection of walking movement To do.

  In this structure, the ankle 2 and the band-shaped main body 11 can be integrated with each other without tightening the entire ankle 2 using a band or a tape as in the prior art, and the band-shaped main body 11 follows the movement of the ankle 2. In addition, it becomes possible to eliminate a sense of incongruity at the time of wearing.

Next, the structure which measures exercise | movement data with such an exercise | movement measuring device 10 is demonstrated.
As shown in FIG. 4, the detection unit 20 embedded in the band-shaped main body 11 is provided with an orientation sensor 21, an acceleration sensor 22, and a circuit board that supports these sensors. The number of sensors provided in the detection unit 20 may be one or three or more. For example, in addition to the direction sensor 21 and the acceleration sensor 22, an angular velocity sensor such as a vibration gyroscope is used. You can also.

  The direction sensor 21 is composed of a magnetic gyro sensor that detects geomagnetism. The magnetic gyro sensor is provided with a magnetic sensing element arranged on three-axis orthogonal coordinates, thereby specifying which of the three axes is rotating when the ankle 2 is operated. The angular velocity at that time can also be detected. Further, the absolute azimuth of the ankle 2 can be detected.

  The acceleration sensor 22 has a predetermined mass and a support member, and the amount of deformation of the support member due to a force acting on the mass is detected. By providing the acceleration sensor 22, the posture of the ankle 2 with respect to the direction of gravity can be detected, and further, the impact received by the foot 1 during walking, running, or other movement can be detected. For example, it is possible to detect the movement state of walking or running and the landing state of the foot 1 itself.

  The vibration generating unit 30 embedded in the belt-shaped main body 11 is configured by, for example, a vibrator using an electromagnetic force exhibited by a magnetic field of a magnet and a current flowing through a coil, or a vibrator using distortion deformation of a piezoelectric element or the like. . By attaching such a vibration generating unit 30 to the ankle 2, for example, when the movement or posture of the foot 1 is bad, it is possible to directly give vibration to the ankle 2 and teach it. Note that the stimulus applying unit is not limited to the vibration generating unit 30, and a shock wave, intermittent pressure, or the like may be applied to the ankle 2 using, for example, an electromagnetic drive mechanism or a piezoelectric element.

  The light emitting unit 40 provided on the outer side obliquely forward of the band-shaped main body 11 includes a plurality of light emitting elements 41 configured by LEDs (Light Emitting Diodes). By attaching the light emitting unit 40 to the ankle 2, for example, when the movement or posture of the foot 1 is bad, it is possible to teach with light using the light emitting element 41. In this case, different teachings can be identified by changing the color of the plurality of light emitting elements 41 or changing the manner of blinking. Moreover, the light emitting element 41 can be taught with gradation by dimming control. Further, by providing the belt-shaped main body 11 with a voice teaching element (not shown), it is possible to teach using the voice teaching element when the movement or posture of the foot 1 is poor.

  In this embodiment, both the vibration generating unit 30 and the light emitting unit 40 constitute a clamping member. By this clamping member, information for informing the wearer of an abnormality in the exercise state or correcting the walking or running posture is given.

  The battery 50 provided in the band-shaped main body 11 is a secondary battery that can be used repeatedly by charging. The battery 50 supplies power to each unit such as the detection unit 20, the vibration generation unit 30, and the light emitting unit 40.

  As shown in FIG. 5, the orientation sensor 21 and the acceleration sensor 22 of the detection unit 20, the vibration generation unit 30, and the light emitting element 41 of the light emitting unit 40 are connected to the control device 60 of the motion measuring device 10.

  The control device 60 embedded in the belt-like main body 11 is mainly composed of a CPU (Central Processing Unit), a ROM, a RAM memory, and the like. The detection output detected by the azimuth sensor 21 is detected by the detection circuit 61 and given to the control device 60, and the detection output detected by the acceleration sensor 22 is detected by the detection circuit 62 and given to the control device 60. Further, a control signal is given from the control device 60 to the driver 63 to control the vibration generating unit 30, and a control signal is given from the control device 60 to the driver 64 to control the light emitting element 41. In the control device 60, motion data obtained based on the detection output of the azimuth sensor 21 and the acceleration sensor 22 obtained according to the movement of the foot 1 is stored in the memory. The control device 60 calculates the timing at which the vibration generating unit 30 and the light emitting element 41 should be operated based on this motion data, and teaches them by vibration, light, and sound according to the movement of the foot 1.

  Note that the control device 60 may include a wireless communication unit such as Bluetooth (registered trademark) or an RF transmitter that can perform wireless communication with a mobile phone or a smartphone. In this case, the control device 60 transmits the exercise data to a smartphone or a personal computer via the wireless communication unit. The timing for operating the vibration generating unit 30 and the light emitting element 41 is calculated by a smartphone or a personal computer, and the result is fed back to the control device 60 to control the vibration generating unit 30 and the light emitting element 41.

  The detection unit 20 is disposed to face the heel of the ankle 2 when the belt-shaped main body 11 is attached to the ankle 2. In the wearing example shown in FIG. 4, the detection unit 20 faces the inner collar 4a (the portion of the bone 4 inside the ankle 2). When the detection unit 20 is disposed in the bone portion of the ankle 2, the detection unit 20 is less affected by vibrations of the muscles of the ankle 2 (anterior tibial muscle 6) and arteries, and is detected during walking, running, or other exercises. It becomes easy to always keep the relative position of 20 and the ankle 2 appropriate, and it becomes possible to always acquire accurate motion data.

  In the motion measuring apparatus 10 shown in FIG. 4, the vibration generating unit 30 and the battery 50 are also arranged at a portion facing the inner collar 4a (the bone 4 inside the ankle 2). By making the vibration generating unit 30 face the bone 4, vibrations can be easily transmitted to the ankle 2 without being affected by vibrations of muscles and arteries. Further, by arranging the detecting unit 20, the vibration generating unit 30, the battery 50, and the control device 60 in one place so as to face the inner collar 4a of the ankle 2, these masses are received by the inner collar 4a of the ankle 2. Even if the motion measuring apparatus 10 is attached, walking and exercise can be performed without a sense of incongruity.

  The motion measurement device 10 can be used by wearing it on one foot such as the right foot, for example. As shown in FIG. 6, the motion measurement device 10A is attached to the right foot 1A and the motion measurement device 10B is attached to the left foot 1B. You can also

  The motion measurement device 10A for the right foot is the same as the motion measurement device 10 of the above-described embodiment, and the motion measurement device 10B for the left foot is configured to be symmetrical with the motion measurement device 10A for the right foot. FIG. 7 shows a state in which the motion measurement devices 10A and 10B are attached to the right foot 1A and the left foot 1B. By attaching the motion measurement devices 10A and 10B to the right foot 1A and the left foot 1B, respectively, it is possible to acquire motion data separately for the motion state of the right foot 1A and the left foot 1B, and vibrate separately for the right foot 1A and the left foot 1B. And can be taught with light.

  Note that the motion measurement device does not necessarily have to have separate structures for the right foot and the left foot. For example, the shape of the inner surface 12 of the belt-shaped main body 11 is vertically symmetric so that one type of motion measurement device 10 is connected to the right foot 1A. It can be worn on either the left foot 1B. In this case, when the motion measuring device 10 is worn on the left foot 1B, it is worn in an upside down posture with respect to the right foot 1A.

FIG. 8 and subsequent figures show a motion measuring apparatus according to another embodiment.
In the motion measuring apparatus 110 according to the second embodiment of the present invention shown in FIG. 8, when the open end 13c and the open end 13d of the belt-like main body 11 are separated from each other, as shown in FIG. The ankle 2 is attached to the rear portion and the inner and outer side portions, but the front portion is not covered.

  The band-shaped main body 11 is attached to the ankle 2 with the Achilles tendon 3 entering the recess 15 and the inner support portion 16a and the outer support portion 16b sandwiching the inner collar 4a and the outer collar 5a. Since the belt-like main body 11 is firmly fixed to the ankle 2, even if the open end 13c and the open end 13d are separated from each other, it is difficult to come off the ankle 2. Further, when the ankle 2 is moved to perform walking, running, or various exercises by causing the gap between the open end 13c and the open end 13d to face the muscle (anterior tibialis muscle 6) in front of the ankle 2, The muscle (anterior tibial muscle 6) is not compressed, and the wearing feeling is improved.

FIG. 9 shows a motion measuring apparatus 210 according to the third embodiment of the present invention.
In the motion measuring device 210, when the belt-like main body 11 is attached to the right foot 1A, the detection unit 20 faces the outer foot 5a of the right foot, and the vibration generating unit 30, the battery 50, and the control device 60 face the inner foot 4a. Is arranged. As described above, the devices may be arranged in a distributed manner in the belt-shaped main body 11. However, since many vibration sensations (receptors for detecting vibrations) are distributed in the foot bone, both of the inner ribs 4a or It is preferable to arrange in a portion facing the outer casing 5a.

  By making the detection unit 20 face the heel, the ankle movement can be directly detected, and by making the vibration generating unit 30 face the heel, it becomes easy to give vibration to the foot bone.

  The motion measuring device of the present invention is used in the field of kinematics to detect the orientation and posture of a foot during exercise and to teach an exerciser with vibration or light so as to be in an ideal motion state. The

  Moreover, in the medical field, it can be used for exercise measurement during rehabilitation of persons with lower limb disabilities.

1 foot (right foot)
1A Right foot 1B Left foot 2 Ankle 3 Achilles tendon 4 Inner bone 4a Inner rib 5 Outer bone 5a Outer rib 6 Anterior tibial muscle 10 Motion measurement device 10A Motion measurement device 10B for right foot Motion measurement device 11 for left foot Belt-like body 14 Elastic member 15 Recess 15a, 15b Raised part (rotating part)
15c Concave part 16a Inner support part 16b Outer support part 17 Gap 20 Detection part 21 Direction sensor 22 Acceleration sensor 30 Vibration generation part 40 Light emission part 41 Light emitting element 50 Battery 60 Controller 61, 62 Detection circuit 63, 64 Driver

Claims (6)

In the motion measurement device that detects the movement of the foot,
A band-shaped main body attached to the ankle is provided, and a detection unit for detecting the movement of the foot is housed inside the band-shaped main body,
In the band-shaped main body portion, a support portion supported by at least one of the inner and outer heels of the ankle,
A motion measuring device, comprising: a detent portion provided across the Achilles tendon.   The motion measuring device according to claim 1, wherein the rotation stopper is formed continuously following the outer shape of the Achilles tendon.   The motion measuring apparatus according to claim 1, wherein an elastic member is provided inside the band-shaped main body, and the band-shaped main body sandwiches the inner side and the outer side of the ankle by the elastic force of the elastic member.   The motion measuring device according to any one of claims 1 to 3, wherein a cross-sectional shape of the inner surface of the belt-like main body is a shape that gradually spreads upward or downward of the foot.   The motion measuring apparatus according to claim 1, wherein the belt-shaped main body has a length that surrounds the ankle at 360 degrees or more.   The motion measuring device according to claim 5, wherein a gap or an open portion is formed between a portion of the inner surface of the belt-like body facing the recess and a front portion of the ankle.

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